Merge branch 'develop' of https://bitbucket.hdfgroup.org/scm/hdffv/hdf5 into merge_hyperslab_updates

451 files changed, 37928 insertions, 31489 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e2acd30..435fe9a 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,5 +1,5 @@
-cmake_minimum_required (VERSION 3.2.2)
-PROJECT (HDF5_SRC C CXX)
+cmake_minimum_required (VERSION 3.10)
+project (HDF5_SRC C)
 
 #-----------------------------------------------------------------------------
 # Apply Definitions to compiler in this directory and below
@@ -113,6 +113,14 @@ set (H5CS_HDRS
 IDE_GENERATED_PROPERTIES ("H5CS" "${H5CS_HDRS}" "${H5CS_SOURCES}" )
 
 
+set (H5CX_SOURCES
+    ${HDF5_SRC_DIR}/H5CX.c
+)
+set (H5CX_HDRS
+)
+IDE_GENERATED_PROPERTIES ("H5CX" "${H5CX_HDRS}" "${H5CX_SOURCES}" )
+
+
 set (H5D_SOURCES
     ${HDF5_SRC_DIR}/H5D.c
     ${HDF5_SRC_DIR}/H5Dbtree.c
@@ -454,6 +462,7 @@ set (H5O_SOURCES
     ${HDF5_SRC_DIR}/H5Oflush.c
     ${HDF5_SRC_DIR}/H5Ofsinfo.c
     ${HDF5_SRC_DIR}/H5Oginfo.c
+    ${HDF5_SRC_DIR}/H5Oint.c
     ${HDF5_SRC_DIR}/H5Olayout.c
     ${HDF5_SRC_DIR}/H5Olinfo.c
     ${HDF5_SRC_DIR}/H5Olink.c
@@ -516,6 +525,9 @@ IDE_GENERATED_PROPERTIES ("H5PB" "${H5PB_HDRS}" "${H5PB_SOURCES}" )
 
 set (H5PL_SOURCES
     ${HDF5_SRC_DIR}/H5PL.c
+    ${HDF5_SRC_DIR}/H5PLint.c
+    ${HDF5_SRC_DIR}/H5PLpath.c
+    ${HDF5_SRC_DIR}/H5PLplugin_cache.c
 )
 
 set (H5PL_HDRS
@@ -529,6 +541,7 @@ IDE_GENERATED_PROPERTIES ("H5PL" "${H5PL_HDRS}" "${H5PL_SOURCES}" )
 set (H5R_SOURCES
     ${HDF5_SRC_DIR}/H5R.c
     ${HDF5_SRC_DIR}/H5Rdeprec.c
+    ${HDF5_SRC_DIR}/H5Rint.c
 )
 set (H5R_HDRS
     ${HDF5_SRC_DIR}/H5Rpkg.h
@@ -689,6 +702,7 @@ set (common_SRCS
     ${H5B2_SOURCES}
     ${H5C_SOURCES}
     ${H5CS_SOURCES}
+    ${H5CX_SOURCES}
     ${H5D_SOURCES}
     ${H5E_SOURCES}
     ${H5EA_SOURCES}
@@ -768,6 +782,7 @@ set (H5_PRIVATE_HEADERS
     ${HDF5_SRC_DIR}/H5Bprivate.h
     ${HDF5_SRC_DIR}/H5Cprivate.h
     ${HDF5_SRC_DIR}/H5CSprivate.h
+    ${HDF5_SRC_DIR}/H5CXprivate.h
     ${HDF5_SRC_DIR}/H5Dprivate.h
     ${HDF5_SRC_DIR}/H5Eprivate.h
     ${HDF5_SRC_DIR}/H5EAprivate.h
@@ -816,7 +831,7 @@ set (H5_GENERATED_HEADERS
     ${HDF5_SRC_DIR}/H5overflow.h
 )
 
-option (HDF5_GENERATE_HEADERS "Rebuild Generated Files" OFF)
+option (HDF5_GENERATE_HEADERS "Rebuild Generated Files" ON)
 if (HDF5_GENERATE_HEADERS)
   set_source_files_properties(${H5_GENERATED_HEADERS} PROPERTIES GENERATED TRUE)
   find_package (Perl)
@@ -839,98 +854,100 @@ if (HDF5_GENERATE_HEADERS)
 endif ()
 
 #-----------------------------------------------------------------------------
-# Setup the H5Detect utility which generates H5Tinit with platform
+# Setup the H5detect utility which generates H5Tinit with platform
 # specific type checks inside
 #-----------------------------------------------------------------------------
 add_executable (H5detect ${HDF5_SRC_DIR}/H5detect.c)
+target_include_directories(H5detect PRIVATE ${HDF5_BINARY_DIR})
 TARGET_C_PROPERTIES (H5detect STATIC " " " ")
 if (MSVC OR MINGW)
   target_link_libraries (H5detect "ws2_32.lib")
 endif ()
+if (CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
+  set_property(TARGET H5detect PROPERTY LINK_FLAGS "-O0")
+endif ()
 
-set (CMD $<TARGET_FILE:H5detect>)
 add_custom_command (
     OUTPUT ${HDF5_BINARY_DIR}/H5Tinit.c
-    COMMAND ${CMD}
+    COMMAND $<TARGET_FILE:H5detect>
     ARGS > ${HDF5_BINARY_DIR}/H5Tinit.c
     DEPENDS H5detect
 )
 
 add_executable (H5make_libsettings ${HDF5_SRC_DIR}/H5make_libsettings.c)
+target_include_directories(H5make_libsettings PRIVATE ${HDF5_BINARY_DIR})
 TARGET_C_PROPERTIES (H5make_libsettings STATIC " " " ")
 if (MSVC OR MINGW)
   target_link_libraries (H5make_libsettings "ws2_32.lib")
 endif ()
+if (CMAKE_SYSTEM_NAME STREQUAL "Emscripten")
+  set_property(TARGET H5make_libsettings PROPERTY LINK_FLAGS "-O0")
+endif ()
 
-set (CMD $<TARGET_FILE:H5make_libsettings>)
 add_custom_command (
     OUTPUT ${HDF5_BINARY_DIR}/H5lib_settings.c
-    COMMAND ${CMD}
+    COMMAND $<TARGET_FILE:H5make_libsettings>
     ARGS > ${HDF5_BINARY_DIR}/H5lib_settings.c
     DEPENDS H5make_libsettings
     WORKING_DIRECTORY ${HDF5_BINARY_DIR}
 )
 
 #-----------------------------------------------------------------------------
-# Add H5Tinit source to build - generated by H5Detect/CMake at configure time
+# Add H5Tinit source to build - generated by H5detect/CMake at configure time
 #-----------------------------------------------------------------------------
 set (gen_SRCS ${HDF5_BINARY_DIR}/H5Tinit.c ${HDF5_BINARY_DIR}/H5lib_settings.c)
 
 add_library (${HDF5_LIB_TARGET} STATIC ${common_SRCS} ${gen_SRCS} ${H5_PUBLIC_HEADERS} ${H5_PRIVATE_HEADERS} ${H5_GENERATED_HEADERS})
+target_include_directories(${HDF5_LIB_TARGET} PUBLIC "${HDF5_SRC_DIR};${HDF5_BINARY_DIR}")
 TARGET_C_PROPERTIES (${HDF5_LIB_TARGET} STATIC " " " ")
-target_link_libraries (${HDF5_LIB_TARGET} ${LINK_LIBS})
+target_link_libraries (${HDF5_LIB_TARGET} PRIVATE ${LINK_LIBS} ${LINK_COMP_LIBS})
 if (NOT WIN32)
-  target_link_libraries (${HDF5_LIB_TARGET} dl)
-endif ()
-if (H5_HAVE_PARALLEL AND MPI_C_FOUND)
-  target_link_libraries (${HDF5_LIB_TARGET} ${MPI_C_LIBRARIES})
+  target_link_libraries (${HDF5_LIB_TARGET} PUBLIC ${CMAKE_DL_LIBS})
 endif ()
 set_global_variable (HDF5_LIBRARIES_TO_EXPORT ${HDF5_LIB_TARGET})
-H5_SET_LIB_OPTIONS (${HDF5_LIB_TARGET} ${HDF5_LIB_NAME} STATIC)
+H5_SET_LIB_OPTIONS (${HDF5_LIB_TARGET} ${HDF5_LIB_NAME} STATIC 0)
 set_target_properties (${HDF5_LIB_TARGET} PROPERTIES
     FOLDER libraries
-    INTERFACE_INCLUDE_DIRECTORIES "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>"
+    INTERFACE_INCLUDE_DIRECTORIES $<INSTALL_INTERFACE:$<INSTALL_PREFIX>/include>
 )
 
+## all_packages="AC,B,B2,D,F,FA,FL,FS,HL,I,O,S,ST,T,Z"
+#all_packages="AC,B2,CX,D,F,HL,I,O,S,ST,T,Z"
 option (HDF5_ENABLE_DEBUG_APIS "Turn on extra debug output in all packages" OFF)
 if (HDF5_ENABLE_DEBUG_APIS)
   set_target_properties (${HDF5_LIB_TARGET} PROPERTIES
       COMPILE_DEFINITIONS
-          "H5Z_DEBUG;H5T_DEBUG;H5ST_DEBUG;H5S_DEBUG;H5O_DEBUG;H5I_DEBUG;H5HL_DEBUG;H5F_DEBUG;H5D_DEBUG;H5B2_DEBUG;H5AC_DEBUG"
+          "H5Z_DEBUG;H5T_DEBUG;H5ST_DEBUG;H5S_DEBUG;H5O_DEBUG;H5I_DEBUG;H5HL_DEBUG;H5F_DEBUG;H5D_DEBUG;H5CX_DEBUG;H5B2_DEBUG;H5AC_DEBUG"
   )
 endif ()
 set (install_targets ${HDF5_LIB_TARGET})
 
 if (BUILD_SHARED_LIBS)
   file (MAKE_DIRECTORY "${HDF5_BINARY_DIR}/shared")
-  set (CMD $<TARGET_FILE:H5detect>)
   add_custom_command (
       OUTPUT ${HDF5_BINARY_DIR}/shared/H5Tinit.c
-      COMMAND ${CMD}
+      COMMAND $<TARGET_FILE:H5detect>
       ARGS > ${HDF5_BINARY_DIR}/shared/H5Tinit.c
       DEPENDS H5detect
       WORKING_DIRECTORY ${HDF5_BINARY_DIR}/shared
   )
-  set (CMD $<TARGET_FILE:H5make_libsettings>)
   add_custom_command (
       OUTPUT ${HDF5_BINARY_DIR}/shared/H5lib_settings.c
-      COMMAND ${CMD}
+      COMMAND $<TARGET_FILE:H5make_libsettings>
       ARGS > ${HDF5_BINARY_DIR}/shared/H5lib_settings.c
       DEPENDS H5make_libsettings
       WORKING_DIRECTORY ${HDF5_BINARY_DIR}
   )
   set (shared_gen_SRCS ${HDF5_BINARY_DIR}/shared/H5Tinit.c ${HDF5_BINARY_DIR}/shared/H5lib_settings.c)
   add_library (${HDF5_LIBSH_TARGET} SHARED ${common_SRCS} ${shared_gen_SRCS} ${H5_PUBLIC_HEADERS} ${H5_PRIVATE_HEADERS} ${H5_GENERATED_HEADERS})
+  target_include_directories(${HDF5_LIBSH_TARGET} PUBLIC "${HDF5_SRC_DIR};${HDF5_BINARY_DIR}")
   TARGET_C_PROPERTIES (${HDF5_LIBSH_TARGET} SHARED " " " ")
-  target_link_libraries (${HDF5_LIBSH_TARGET} ${LINK_SHARED_LIBS})
+  target_link_libraries (${HDF5_LIBSH_TARGET} PRIVATE ${LINK_LIBS} ${LINK_COMP_LIBS})
   if (NOT WIN32)
-    target_link_libraries (${HDF5_LIBSH_TARGET} dl)
-  endif ()
-  if (H5_HAVE_PARALLEL AND MPI_C_FOUND)
-    target_link_libraries (${HDF5_LIBSH_TARGET} ${MPI_C_LIBRARIES})
+    target_link_libraries (${HDF5_LIBSH_TARGET} PUBLIC ${CMAKE_DL_LIBS})
   endif ()
   set_global_variable (HDF5_LIBRARIES_TO_EXPORT "${HDF5_LIBRARIES_TO_EXPORT};${HDF5_LIBSH_TARGET}")
-  H5_SET_LIB_OPTIONS (${HDF5_LIBSH_TARGET} ${HDF5_LIB_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
+  H5_SET_LIB_OPTIONS (${HDF5_LIBSH_TARGET} ${HDF5_LIB_NAME} SHARED "LIB")
   set_target_properties (${HDF5_LIBSH_TARGET} PROPERTIES
       FOLDER libraries
       COMPILE_DEFINITIONS "H5_BUILT_AS_DYNAMIC_LIB"
@@ -942,7 +959,7 @@ if (BUILD_SHARED_LIBS)
         APPEND PROPERTY COMPILE_DEFINITIONS
             "H5_HAVE_THREADSAFE"
     )
-    target_link_libraries (${HDF5_LIBSH_TARGET} Threads::Threads)
+    target_link_libraries (${HDF5_LIBSH_TARGET} PUBLIC Threads::Threads)
   endif ()
 
   if (HDF5_ENABLE_DEBUG_APIS)
@@ -962,6 +979,7 @@ if (NOT HDF5_INSTALL_NO_DEVELOPMENT)
       FILES
           ${H5_PUBLIC_HEADERS}
           ${H5_GENERATED_HEADERS}
+          ${HDF5_BINARY_DIR}/H5pubconf.h
       DESTINATION
           ${HDF5_INSTALL_INCLUDE_DIR}
       COMPONENT
@@ -990,3 +1008,51 @@ if (HDF5_EXPORTED_TARGETS)
       INCLUDES DESTINATION include
   )
 endif ()
+
+#-----------------------------------------------------------------------------
+# Create pkgconfig files
+#-----------------------------------------------------------------------------
+set (_PKG_CONFIG_PREFIX ${CMAKE_INSTALL_PREFIX})
+set (_PKG_CONFIG_EXEC_PREFIX \${prefix})
+set (_PKG_CONFIG_LIBDIR \${exec_prefix}/lib)
+set (_PKG_CONFIG_INCLUDEDIR \${prefix}/include)
+set (_PKG_CONFIG_LIBNAME "${HDF5_LIB_CORENAME}")
+set (_PKG_CONFIG_VERSION "${HDF5_PACKAGE_VERSION}")
+
+foreach (libs ${LINK_LIBS} ${LINK_COMP_LIBS})
+  set (_PKG_CONFIG_LIBS_PRIVATE "${_PKG_CONFIG_LIBS_PRIVATE} -l${libs}")
+endforeach ()
+
+set (_PKG_CONFIG_LIBS "${_PKG_CONFIG_LIBS} -l${HDF5_LIB_CORENAME}")
+if (BUILD_SHARED_LIBS)
+  set (_PKG_CONFIG_SH_LIBS "${_PKG_CONFIG_SH_LIBS} -l${HDF5_LIB_CORENAME}")
+endif ()
+
+set (_PKG_CONFIG_REQUIRES)
+set (_PKG_CONFIG_REQUIRES_PRIVATE)
+
+configure_file (
+    ${HDF_RESOURCES_DIR}/libhdf5.pc.in
+    ${HDF5_BINARY_DIR}/CMakeFiles/${HDF5_LIB_CORENAME}-${HDF5_PACKAGE_VERSION}.pc
+    @ONLY
+)
+install (
+    FILES ${HDF5_BINARY_DIR}/CMakeFiles/${HDF5_LIB_CORENAME}-${HDF5_PACKAGE_VERSION}.pc
+    DESTINATION ${HDF5_INSTALL_LIB_DIR}/pkgconfig
+    COMPONENT libraries
+)
+
+if (NOT WIN32)
+  set (_PKG_CONFIG_COMPILER ${CMAKE_C_COMPILER})
+  configure_file (
+      ${HDF_RESOURCES_DIR}/libh5cc.in
+      ${HDF5_BINARY_DIR}/CMakeFiles/h5cc
+      @ONLY
+  )
+  install (
+      FILES ${HDF5_BINARY_DIR}/CMakeFiles/h5cc
+      DESTINATION ${HDF5_INSTALL_BIN_DIR}
+      PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
+      COMPONENT libraries
+  )
+endif ()
diff --git a/src/COPYING b/src/COPYING
index 6903daf..6497ace 100644
--- a/src/COPYING
+++ b/src/COPYING
@@ -5,12 +5,9 @@
 
   The files and subdirectories in this directory are part of HDF5.  
   The full HDF5 copyright notice, including terms governing use, 
-  modification, and redistribution, is contained in the files COPYING 
-  and Copyright.html.  COPYING can be found at the root of the source 
-  code distribution tree; Copyright.html can be found at the root 
-  level of an installed copy of the electronic HDF5 document set and 
-  is linked from the top-level documents page.  It can also be found 
-  at http://www.hdfgroup.org/HDF5/doc/Copyright.html.  If you do not 
-  have access to either file, you may request a copy from 
+  modification, and redistribution, is contained in the COPYING file
+  which can be found at the root of the source code distribution tree
+  or in https://support.hdfgroup.org/ftp/HDF5/releases.  If you do
+  not have access to either file, you may request a copy from 
   help@hdfgroup.org. 
 
diff --git a/src/H5.c b/src/H5.c
index 41fb3ba..552330d 100644
--- a/src/H5.c
+++ b/src/H5.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -21,16 +19,18 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"          /* Generic Functions                    */
-#include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Dprivate.h"         /* Datasets                             */
-#include "H5Eprivate.h"         /* Error handling                       */
-#include "H5FLprivate.h"        /* Free lists                           */
-#include "H5Lprivate.h"         /* Links                                */
-#include "H5MMprivate.h"        /* Memory management                    */
-#include "H5Pprivate.h"         /* Property lists                       */
-#include "H5SLprivate.h"        /* Skip lists                           */
-#include "H5Tprivate.h"         /* Datatypes                            */
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5ACprivate.h"        /* Metadata cache                           */
+#include "H5CXprivate.h"        /* API Contexts                             */
+#include "H5Dprivate.h"         /* Datasets                                 */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5FLprivate.h"        /* Free lists                               */
+#include "H5FSprivate.h"        /* File free space                          */
+#include "H5Lprivate.h"         /* Links                                    */
+#include "H5MMprivate.h"        /* Memory management                        */
+#include "H5Pprivate.h"         /* Property lists                           */
+#include "H5SLprivate.h"        /* Skip lists                               */
+#include "H5Tprivate.h"         /* Datatypes                                */
 
 /****************/
 /* Local Macros */
@@ -81,9 +81,9 @@ hbool_t H5_libterm_g = FALSE;   /* Library isn't being shutdown */
 hbool_t H5_MPEinit_g = FALSE;	/* MPE Library hasn't been initialized */
 #endif
 
-char			H5_lib_vers_info_g[] = H5_VERS_INFO;
+char                    H5_lib_vers_info_g[] = H5_VERS_INFO;
 static hbool_t          H5_dont_atexit_g = FALSE;
-H5_debug_t		H5_debug_g;		/*debugging info	*/
+H5_debug_t              H5_debug_g; /* debugging info */
 
 
 /*******************/
@@ -206,6 +206,10 @@ H5_init_library(void)
      * property classes.
      * The link interface needs to be initialized so that link property lists
      * have their properties registered.
+     * The FS module needs to be initialized as a result of the fix for HDFFV-10160:
+     *   It might not be initialized during normal file open. 
+     *   When the application does not close the file, routines in the module might
+     *   be called via H5_term_library() when shutting down the file.
      */
     if(H5E_init() < 0)
         HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize error interface")
@@ -219,6 +223,8 @@ H5_init_library(void)
         HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize metadata caching interface")
     if(H5L_init() < 0)
         HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize link interface")
+    if(H5FS_init() < 0)
+        HGOTO_ERROR(H5E_FUNC, H5E_CANTINIT, FAIL, "unable to initialize FS interface")
 
     /* Debugging? */
     H5_debug_mask("-all");
@@ -238,11 +244,6 @@ done:
  *
  * Return:	void
  *
- * Programmer:	Robb Matzke
- *              Friday, November 20, 1998
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 void
@@ -266,6 +267,9 @@ H5_term_library(void)
     /* Indicate that the library is being shut down */
     H5_TERM_GLOBAL = TRUE;
 
+    /* Push the API context without checking for errors */
+    H5CX_push_special();
+
     /* Check if we should display error output */
     (void)H5Eget_auto2(H5E_DEFAULT, &func, NULL);
 
@@ -276,11 +280,11 @@ H5_term_library(void)
      */
 #define DOWN(F)								      \
     (((n = H5##F##_term_package()) && (at + 8) < sizeof loop)?	      \
-     (sprintf(loop + at, "%s%s", (at ? "," : ""), #F),			      \
+     (HDsprintf(loop + at, "%s%s", (at ? "," : ""), #F),			      \
       at += HDstrlen(loop + at),					      \
       n):                                                                     \
      ((n > 0 && (at + 5) < sizeof loop) ?				      \
-     (sprintf(loop + at, "..."),					      \
+     (HDsprintf(loop + at, "..."),					      \
       at += HDstrlen(loop + at),					      \
      n) : n))
 
@@ -350,17 +354,20 @@ H5_term_library(void)
             /* Don't shut down the skip list code until everything that uses it is down */
             if(pending == 0)
                 pending += DOWN(SL);
-            /* Don't shut down the free list code until _everything_ else is down */
+            /* Don't shut down the free list code until everything that uses it is down */
             if(pending == 0)
                 pending += DOWN(FL);
+            /* Don't shut down the API context code until _everything_ else is down */
+            if(pending == 0)
+                pending += DOWN(CX);
         } /* end if */
     } while(pending && ntries++ < 100);
 
     if(pending) {
         /* Only display the error message if the user is interested in them. */
         if(func) {
-            fprintf(stderr, "HDF5: infinite loop closing library\n");
-            fprintf(stderr, "      %s\n", loop);
+            HDfprintf(stderr, "HDF5: infinite loop closing library\n");
+            HDfprintf(stderr, "      %s\n", loop);
 #ifndef NDEBUG
             HDabort();
 #endif /* NDEBUG */
@@ -408,6 +415,8 @@ H5_term_library(void)
     /* Mark library as closed */
     H5_INIT_GLOBAL = FALSE;
 
+    /* Don't pop the API context (i.e. H5CX_pop), since it's been shut down already */
+
 done:
 #ifdef H5_HAVE_THREADSAFE
     H5_API_UNLOCK
@@ -435,11 +444,6 @@ done:
  *		Failure:	negative if this function is called more than
  *				once or if it is called too late.
  *
- * Programmer:	Robb Matzke
- *              Friday, November 20, 1998
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -474,11 +478,6 @@ H5dont_atexit(void)
  *
  *		Failure:	negative
  *
- * Programmer:	Quincey Koziol
- *              Saturday, March 11, 2000
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -523,13 +522,6 @@ done:
  *
  *		Failure:	negative
  *
- * Programmer:	Quincey Koziol
- *              Wednesday, August 2, 2000
- *
- * Modifications:   Neil Fortner
- *                  Wednesday, April 8, 2009
- *                  Added support for factory free lists
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -573,9 +565,6 @@ done:
  *
  * Return:      void
  *
- * Programmer:  Robb Matzke
- *              Wednesday, August 19, 1998
- *
  *-------------------------------------------------------------------------
  */
 static void
@@ -627,7 +616,7 @@ H5_debug_mask(const char *s)
 		            } /* end if */
                 } /* end for */
                 if (i>=(size_t)H5_NPKGS)
-                    fprintf(stderr, "HDF5_DEBUG: ignored %s\n", pkg_name);
+                    HDfprintf(stderr, "HDF5_DEBUG: ignored %s\n", pkg_name);
             } /* end if-else */
 
         } else if (HDisdigit(*s)) {
@@ -667,8 +656,6 @@ H5_debug_mask(const char *s)
  *
  * Return:	MPI_SUCCESS
  *
- * Programmer:	Mohamad Chaarawi, February 2015
- *
  *-------------------------------------------------------------------------
  */
 static int H5_mpi_delete_cb(MPI_Comm H5_ATTR_UNUSED comm, int H5_ATTR_UNUSED keyval, void H5_ATTR_UNUSED *attr_val, int H5_ATTR_UNUSED *flag)
@@ -693,13 +680,6 @@ static int H5_mpi_delete_cb(MPI_Comm H5_ATTR_UNUSED comm, int H5_ATTR_UNUSED key
  *
  * Return:	Non-negative on success/Negative on failure
  *
- * Programmer:	Unknown
- *
- * Modifications:
- * 	Robb Matzke, 4 Mar 1998
- *	Now use "normal" data types for the interface.  Any of the arguments
- *	may be null pointers
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -733,13 +713,6 @@ done:
  *
  *		Failure:	abort()
  *
- * Programmer:	Robb Matzke
- *              Tuesday, April 21, 1998
- *
- * Modifications:
- *	Albert Cheng, May 12, 2001
- *	Added verification of H5_VERS_INFO.
- *
  *-------------------------------------------------------------------------
  */
 #define VERSION_MISMATCH_WARNING \
@@ -864,11 +837,6 @@ done:
  *
  * Return:	Non-negative on success/Negative on failure
  *
- * Programmer:  Robb Matzke
- *              Tuesday, December  9, 1997
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -891,11 +859,6 @@ done:
  *
  * Return:	Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *              Friday, January 30, 1998
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -944,7 +907,7 @@ H5allocate_memory(size_t size, hbool_t clear)
 {
     void *ret_value = NULL;
 
-    FUNC_ENTER_API_NOINIT;
+    FUNC_ENTER_API_NOINIT
     H5TRACE2("*x", "zb", size, clear);
 
     if(clear)
@@ -952,7 +915,7 @@ H5allocate_memory(size_t size, hbool_t clear)
     else
         ret_value = H5MM_malloc(size);
 
-    FUNC_LEAVE_API(ret_value)
+    FUNC_LEAVE_API_NOINIT(ret_value)
 } /* end H5allocate_memory() */
 
 
@@ -985,12 +948,12 @@ H5resize_memory(void *mem, size_t size)
 {
     void *ret_value = NULL;
 
-    FUNC_ENTER_API_NOINIT;
+    FUNC_ENTER_API_NOINIT
     H5TRACE2("*x", "*xz", mem, size);
 
     ret_value = H5MM_realloc(mem, size);
 
-    FUNC_LEAVE_API(ret_value)
+    FUNC_LEAVE_API_NOINIT(ret_value)
 } /* end H5resize_memory() */
 
 
@@ -1009,13 +972,13 @@ H5resize_memory(void *mem, size_t size)
 herr_t
 H5free_memory(void *mem)
 {
-    FUNC_ENTER_API_NOINIT;
+    FUNC_ENTER_API_NOINIT
     H5TRACE1("e", "*x", mem);
 
     /* At this time, it is impossible for this to fail. */
     H5MM_xfree(mem);
 
-    FUNC_LEAVE_API(SUCCEED)
+    FUNC_LEAVE_API_NOINIT(SUCCEED)
 } /* end H5free_memory() */
 
 
@@ -1032,20 +995,19 @@ H5free_memory(void *mem)
 herr_t
 H5is_library_threadsafe(hbool_t *is_ts)
 {
-    herr_t ret_value = SUCCEED;
-
     FUNC_ENTER_API_NOINIT
     H5TRACE1("e", "*b", is_ts);
 
     HDassert(is_ts);
  
+    /* At this time, it is impossible for this to fail. */
 #ifdef H5_HAVE_THREADSAFE
     *is_ts = TRUE;
 #else /* H5_HAVE_THREADSAFE */
     *is_ts = FALSE;
 #endif /* H5_HAVE_THREADSAFE */
 
-    FUNC_LEAVE_API(ret_value)
+    FUNC_LEAVE_API_NOINIT(SUCCEED)
 } /* end H5is_library_threadsafe() */
 
 
diff --git a/src/H5A.c b/src/H5A.c
index 7eb77ca..8e64eda 100644
--- a/src/H5A.c
+++ b/src/H5A.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -26,6 +24,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5Apkg.h"		/* Attributes				*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free Lists				*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -93,7 +92,7 @@ static const H5I_class_t H5I_ATTR_CLS[1] = {{
     H5I_ATTR,                   /* ID class value */
     0,                          /* Class flags */
     0,                          /* # of reserved IDs for class */
-    (H5I_free_t)H5A_close       /* Callback routine for closing objects of this class */
+    (H5I_free_t)H5A__close_cb   /* Callback routine for closing objects of this class */
 }};
 
 /* Flag indicating "top" of interface has been initialized */
@@ -252,7 +251,6 @@ H5Acreate2(hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id,
     H5G_loc_t           loc;                    /* Object location */
     H5T_t		*type;                  /* Datatype to use for attribute */
     H5S_t		*space;                 /* Dataspace to use for attribute */
-    hid_t               dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t		ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -272,12 +270,12 @@ H5Acreate2(hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id,
     if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&aapl_id, H5P_CLS_AACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&aapl_id, H5P_CLS_AACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Go do the real work for attaching the attribute to the object */
-    if(NULL == (attr = H5A_create(&loc, attr_name, type, space, acpl_id, dxpl_id)))
+    if(NULL == (attr = H5A__create(&loc, attr_name, type, space, acpl_id)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create attribute")
 
     /* Register the new attribute and get an ID for it */
@@ -286,7 +284,7 @@ H5Acreate2(hid_t loc_id, const char *attr_name, hid_t type_id, hid_t space_id,
 
 done:
     /* Cleanup on failure */
-    if(ret_value < 0 && attr && H5A_close(attr) < 0)
+    if(ret_value < 0 && attr && H5A__close(attr) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -330,13 +328,8 @@ H5Acreate_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
 {
     H5A_t	        *attr = NULL;           /* Attribute created */
     H5G_loc_t           loc;                    /* Object location */
-    H5G_loc_t           obj_loc;                /* Location used to open group */
-    H5G_name_t          obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t           obj_oloc;            	/* Opened object object location */
-    hbool_t             loc_found = FALSE;      /* Entry at 'obj_name' found */
     H5T_t		*type;                  /* Datatype to use for attribute */
     H5S_t		*space;                 /* Dataspace to use for attribute */
-    hid_t               dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t		ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -359,33 +352,28 @@ H5Acreate_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
     if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&aapl_id, H5P_CLS_AACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&aapl_id, H5P_CLS_AACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Find the object's location */
-    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
+    if(H5P_DEFAULT != lapl_id) {
+        if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
+        H5CX_set_lapl(lapl_id);
+    } /* end if */
 
-    /* Go do the real work for attaching the attribute to the dataset */
-    if(NULL == (attr = H5A_create(&obj_loc, attr_name, type, space, acpl_id, dxpl_id)))
+    /* Create the attribute on the object */
+    if(NULL == (attr = H5A__create_by_name(&loc, obj_name, attr_name, type, space, acpl_id)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create attribute")
 
     /* Register the new attribute and get an ID for it */
     if((ret_value = H5I_register(H5I_ATTR, attr, TRUE)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID")
+
 done:
-    /* Release resources */
-    if(loc_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
-    if(ret_value < 0 && attr && H5A_close(attr) < 0)
-            HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
+    /* Cleanup on failure */
+    if(ret_value < 0 && attr && H5A__close(attr) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
 } /* H5Acreate_by_name() */
@@ -415,7 +403,6 @@ H5Aopen(hid_t loc_id, const char *attr_name, hid_t aapl_id)
 {
     H5G_loc_t    	loc;            /* Object location */
     H5A_t               *attr = NULL;   /* Attribute opened */
-    hid_t               dxpl_id  = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t		ret_value;
 
     FUNC_ENTER_API(FAIL)
@@ -429,17 +416,13 @@ H5Aopen(hid_t loc_id, const char *attr_name, hid_t aapl_id)
     if(!attr_name || !*attr_name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&aapl_id, H5P_CLS_AACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&aapl_id, H5P_CLS_AACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Read in attribute from object header */
-    if(NULL == (attr = H5O_attr_open_by_name(loc.oloc, attr_name, dxpl_id)))
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to load attribute info from object header for attribute: '%s'", attr_name)
-
-    /* Finish initializing attribute */
-    if(H5A__open_common(&loc, attr) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to initialize attribute")
+    if(NULL == (attr = H5A__open(&loc, attr_name)))
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to load attribute info from object header for attribute: '%s'", attr_name)
 
     /* Register the attribute and get an ID for it */
     if((ret_value = H5I_register(H5I_ATTR, attr, TRUE)) < 0)
@@ -448,7 +431,7 @@ H5Aopen(hid_t loc_id, const char *attr_name, hid_t aapl_id)
 done:
     /* Cleanup on failure */
     if(ret_value < 0)
-        if(attr && H5A_close(attr) < 0)
+        if(attr && H5A__close(attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -482,7 +465,6 @@ H5Aopen_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
 {
     H5G_loc_t    	loc;            /* Object location */
     H5A_t               *attr = NULL;   /* Attribute opened */
-    hid_t               dxpl_id  = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t		ret_value;
 
     FUNC_ENTER_API(FAIL)
@@ -497,18 +479,19 @@ H5Aopen_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
     if(!attr_name || !*attr_name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
-    if(H5P_DEFAULT == lapl_id)
-        lapl_id = H5P_LINK_ACCESS_DEFAULT;
-    else
+
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&aapl_id, H5P_CLS_AACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    if(H5P_DEFAULT != lapl_id) {
         if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
-
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&aapl_id, H5P_CLS_AACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+        H5CX_set_lapl(lapl_id);
+    } /* end if */
 
     /* Open the attribute on the object header */
-    if(NULL == (attr = H5A_open_by_name(&loc, obj_name, attr_name, lapl_id, dxpl_id)))
+    if(NULL == (attr = H5A__open_by_name(&loc, obj_name, attr_name)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
 
     /* Register the attribute and get an ID for it */
@@ -518,7 +501,7 @@ H5Aopen_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
 done:
     /* Cleanup on failure */
     if(ret_value < 0)
-        if(attr && H5A_close(attr) < 0)
+        if(attr && H5A__close(attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -555,7 +538,6 @@ H5Aopen_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 {
     H5A_t       *attr = NULL;   /* Attribute opened */
     H5G_loc_t	loc;	        /* Object location */
-    hid_t       dxpl_id  = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t	ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -573,18 +555,19 @@ H5Aopen_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
-    if(H5P_DEFAULT == lapl_id)
-        lapl_id = H5P_LINK_ACCESS_DEFAULT;
-    else
+
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&aapl_id, H5P_CLS_AACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    if(H5P_DEFAULT != lapl_id) {
         if(TRUE != H5P_isa_class(lapl_id, H5P_LINK_ACCESS))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link access property list ID")
-
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&aapl_id, H5P_CLS_AACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+        H5CX_set_lapl(lapl_id);
+    } /* end if */
 
     /* Open the attribute in the object header */
-    if(NULL == (attr = H5A_open_by_idx(&loc, obj_name, idx_type, order, n, lapl_id, dxpl_id)))
+    if(NULL == (attr = H5A__open_by_idx(&loc, obj_name, idx_type, order, n)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open attribute")
 
     /* Register the attribute and get an ID for it */
@@ -594,7 +577,7 @@ H5Aopen_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 done:
     /* Cleanup on failure */
     if(ret_value < 0)
-        if(attr && H5A_close(attr) < 0)
+        if(attr && H5A__close(attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -622,8 +605,6 @@ H5Awrite(hid_t attr_id, hid_t dtype_id, const void *buf)
 {
     H5A_t *attr;                /* Attribute object for ID */
     H5T_t *mem_type;            /* Memory datatype */
-    hid_t  dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
-    hid_t  aapl_id = H5P_DEFAULT;  /* temp access plist */
     herr_t ret_value;           /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -637,12 +618,12 @@ H5Awrite(hid_t attr_id, hid_t dtype_id, const void *buf)
     if(NULL == buf)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null attribute buffer")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&aapl_id, H5P_CLS_AACC, &dxpl_id, attr_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(attr_id) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set collective metadata read")
 
     /* Go write the actual data to the attribute */
-    if((ret_value = H5A__write(attr, mem_type, buf, dxpl_id)) < 0)
+    if((ret_value = H5A__write(attr, mem_type, buf)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "unable to write attribute")
 
 done:
@@ -671,8 +652,6 @@ H5Aread(hid_t attr_id, hid_t dtype_id, void *buf)
 {
     H5A_t *attr;                /* Attribute object for ID */
     H5T_t *mem_type;            /* Memory datatype */
-    hid_t  dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
-    hid_t  aapl_id = H5P_DEFAULT;  /* temp access plist */
     herr_t ret_value;           /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -686,12 +665,8 @@ H5Aread(hid_t attr_id, hid_t dtype_id, void *buf)
     if(NULL == buf)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null attribute buffer")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&aapl_id, H5P_CLS_AACC, &dxpl_id, attr_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
     /* Go write the actual data to the attribute */
-    if((ret_value = H5A__read(attr, mem_type, buf, dxpl_id)) < 0)
+    if((ret_value = H5A__read(attr, mem_type, buf)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_READERROR, FAIL, "unable to read attribute")
 
 done:
@@ -719,8 +694,7 @@ hid_t
 H5Aget_space(hid_t attr_id)
 {
     H5A_t	*attr;                  /* Attribute object for ID */
-    H5S_t      *ds = NULL;
-    hid_t	ret_value;
+    hid_t	ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("i", "i", attr_id);
@@ -729,19 +703,9 @@ H5Aget_space(hid_t attr_id)
     if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
 
-    if(NULL == (ds = H5A_get_space(attr)))
+    if((ret_value = H5A_get_space(attr)) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get space ID of attribute")
-
-    /* Atomize */
-    if((ret_value = H5I_register(H5I_DATASPACE, ds, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom")
-
 done:
-    if(ret_value < 0) {
-        if(ds && (H5S_close(ds) < 0))
-            HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release dataspace")
-    } /* end if */
-
     FUNC_LEAVE_API(ret_value)
 } /* H5Aget_space() */
 
@@ -765,9 +729,8 @@ done:
 hid_t
 H5Aget_type(hid_t attr_id)
 {
-    H5A_t	*attr;          /* Attribute object for ID */
-    H5T_t      *dt = NULL;
-    hid_t	 ret_value;     /* Return value */
+    H5A_t *attr;        /* Attribute object for ID */
+    hid_t ret_value;     /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("i", "i", attr_id);
@@ -776,19 +739,10 @@ H5Aget_type(hid_t attr_id)
     if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
 
-    if(NULL == (dt = H5A_get_type(attr)))
-        HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get space ID of attribute")
-
-    /* Create an atom */
-    if((ret_value = H5I_register(H5I_DATATYPE, dt, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register datatype")
+    if((ret_value = H5A__get_type(attr)) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get datatype ID of attribute")
 
 done:
-    if(ret_value < 0) {
-        if(dt && (H5T_close(dt) < 0))
-            HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release datatype")
-    } /* end if */
-
     FUNC_LEAVE_API(ret_value)
 } /* H5Aget_type() */
 
@@ -827,7 +781,7 @@ H5Aget_create_plist(hid_t attr_id)
     if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
 
-    if((ret_value = H5A_get_create_plist(attr)) < 0)
+    if((ret_value = H5A__get_create_plist(attr)) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "can't get creation property list for attr")
 
 done:
@@ -904,7 +858,6 @@ H5Aget_name_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 {
     H5G_loc_t   loc;            /* Object location */
     H5A_t	*attr = NULL;   /* Attribute object for name */
-    hid_t       dxpl_id  = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     ssize_t	ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -923,12 +876,12 @@ H5Aget_name_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Open the attribute on the object header */
-    if(NULL == (attr = H5A_open_by_idx(&loc, obj_name, idx_type, order, n, lapl_id, dxpl_id)))
+    if(NULL == (attr = H5A__open_by_idx(&loc, obj_name, idx_type, order, n)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
 
     /* Get the length of the name */
@@ -943,7 +896,7 @@ H5Aget_name_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 
 done:
     /* Release resources */
-    if(attr && H5A_close(attr) < 0)
+    if(attr && H5A__close(attr) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -1042,7 +995,6 @@ H5Aget_info_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
 {
     H5G_loc_t   loc;                    /* Object location */
     H5A_t	*attr = NULL;           /* Attribute object for name */
-    hid_t       dxpl_id  = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1060,12 +1012,12 @@ H5Aget_info_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
     if(NULL == ainfo)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid info pointer")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Open the attribute on the object header */
-    if(NULL == (attr = H5A_open_by_name(&loc, obj_name, attr_name, lapl_id, dxpl_id)))
+    if(NULL == (attr = H5A__open_by_name(&loc, obj_name, attr_name)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
 
     /* Get the attribute information */
@@ -1073,8 +1025,8 @@ H5Aget_info_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to get attribute info")
 
 done:
-    /* Cleanup on failure */
-    if(attr && H5A_close(attr) < 0)
+    /* Release resources */
+    if(attr && H5A__close(attr) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -1101,7 +1053,6 @@ H5Aget_info_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 {
     H5G_loc_t   loc;                    /* Object location */
     H5A_t	*attr = NULL;           /* Attribute object for name */
-    hid_t       dxpl_id  = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1122,12 +1073,12 @@ H5Aget_info_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     if(NULL == ainfo)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid info pointer")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Open the attribute on the object header */
-    if(NULL == (attr = H5A_open_by_idx(&loc, obj_name, idx_type, order, n, lapl_id, dxpl_id)))
+    if(NULL == (attr = H5A__open_by_idx(&loc, obj_name, idx_type, order, n)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute")
 
     /* Get the attribute information */
@@ -1136,7 +1087,7 @@ H5Aget_info_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
 
 done:
     /* Release resources */
-    if(attr && H5A_close(attr) < 0)
+    if(attr && H5A__close(attr) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -1174,11 +1125,15 @@ H5Arename(hid_t loc_id, const char *old_name, const char *new_name)
     if(HDstrcmp(old_name, new_name)) {
         H5G_loc_t loc;                /* Object location */
   
-        if(H5G_loc(loc_id, & loc) < 0)
+        if(H5G_loc(loc_id, &loc) < 0)
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set collective metadata read")
+
         /* Call private attribute rename routine */
-        if(H5O_attr_rename(loc.oloc, H5AC_ind_read_dxpl_id, old_name, new_name) < 0)
+        if(H5A__rename(&loc, old_name, new_name) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
     } /* end if */
 
@@ -1223,17 +1178,16 @@ H5Arename_by_name(hid_t loc_id, const char *obj_name, const char *old_attr_name,
     /* Avoid thrashing things if the names are the same */
     if(HDstrcmp(old_attr_name, new_attr_name)) {
         H5G_loc_t loc;                /* Object location */
-        hid_t dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by the library */
 
-        /* Verify access property list and get correct dxpl */
-        if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, TRUE) < 0)
-            HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+        /* Verify access property list and set up collective metadata if appropriate */
+        if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+            HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
-        if(H5G_loc(loc_id, & loc) < 0)
+        if(H5G_loc(loc_id, &loc) < 0)
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
         /* Call private attribute rename routine */
-        if(H5A_rename_by_name(loc, obj_name, old_attr_name, new_attr_name, lapl_id, dxpl_id) < 0)
+        if(H5A__rename_by_name(loc, obj_name, old_attr_name, new_attr_name) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
     } /* end if */
 
@@ -1287,9 +1241,6 @@ herr_t
 H5Aiterate2(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order,
     hsize_t *idx, H5A_operator2_t op, void *op_data)
 {
-    H5A_attr_iter_op_t attr_op; /* Attribute operator */
-    hsize_t	start_idx;      /* Index of attribute to start iterating at */
-    hsize_t	last_attr;      /* Index of last attribute examined */
     herr_t	ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1303,19 +1254,10 @@ H5Aiterate2(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Build attribute operator info */
-    attr_op.op_type = H5A_ATTR_OP_APP2;
-    attr_op.u.app_op2 = op;
-
     /* Call attribute iteration routine */
-    last_attr = start_idx = (idx ? *idx : 0);
-    if((ret_value = H5O_attr_iterate(loc_id, H5AC_ind_read_dxpl_id, idx_type, order, start_idx, &last_attr, &attr_op, op_data)) < 0)
+    if((ret_value = H5A__iterate(loc_id, idx_type, order, idx, op, op_data)) < 0)
         HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
 
-    /* Set the last attribute information */
-    if(idx)
-        *idx = last_attr;
-
 done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Aiterate2() */
@@ -1370,15 +1312,6 @@ H5Aiterate_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     hid_t lapl_id)
 {
     H5G_loc_t	loc;	        /* Object location */
-    H5G_loc_t   obj_loc;        /* Location used to open group */
-    H5G_name_t  obj_path;       /* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;       /* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
-    hid_t       obj_loc_id = (-1);      /* ID for object located */
-    H5A_attr_iter_op_t attr_op; /* Attribute operator */
-    hsize_t	start_idx;      /* Index of attribute to start iterating at */
-    hsize_t	last_attr;      /* Index of last attribute examined */
-    hid_t       dxpl_id  = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t	ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1397,46 +1330,15 @@ H5Aiterate_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location */
-    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
-
-    /* Open the object */
-    if((obj_loc_id = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
-
-    /* Build attribute operator info */
-    attr_op.op_type = H5A_ATTR_OP_APP2;
-    attr_op.u.app_op2 = op;
-
-    /* Call attribute iteration routine */
-    last_attr = start_idx = (idx ? *idx : 0);
-    if((ret_value = H5O_attr_iterate(obj_loc_id, dxpl_id, idx_type, order, start_idx, &last_attr, &attr_op, op_data)) < 0)
+    /* Call attribute iteration by name routine */
+    if((ret_value = H5A__iterate_by_name(&loc, obj_name, idx_type, order, idx, op, op_data)) < 0)
         HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
 
-    /* Set the last attribute information */
-    if(idx)
-        *idx = last_attr;
-
 done:
-    /* Release resources */
-    if(obj_loc_id > 0) {
-        if(H5I_dec_app_ref(obj_loc_id) < 0)
-            HDONE_ERROR(H5E_ATTR, H5E_CANTDEC, FAIL, "unable to close temporary object")
-    } /* end if */
-    else if(loc_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
-
     FUNC_LEAVE_API(ret_value)
 } /* H5Aiterate_by_name() */
 
@@ -1472,8 +1374,12 @@ H5Adelete(hid_t loc_id, const char *name)
     if(!name || !*name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set collective metadata read")
+
     /* Delete the attribute from the location */
-    if(H5O_attr_remove(loc.oloc, name, H5AC_ind_read_dxpl_id) < 0)
+    if(H5A__delete(&loc, name) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
 
 done:
@@ -1502,11 +1408,6 @@ H5Adelete_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
     hid_t lapl_id)
 {
     H5G_loc_t	loc;		        /* Object location */
-    H5G_loc_t   obj_loc;                /* Location used to open group */
-    H5G_name_t  obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1522,29 +1423,15 @@ H5Adelete_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
     if(!attr_name || !*attr_name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location */
-    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Delete the attribute from the location */
-    if(H5O_attr_remove(obj_loc.oloc, attr_name, dxpl_id) < 0)
+    if(H5A__delete_by_name(&loc, obj_name, attr_name) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
 
 done:
-    /* Release resources */
-    if(loc_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
-
     FUNC_LEAVE_API(ret_value)
 } /* H5Adelete_by_name() */
 
@@ -1578,11 +1465,6 @@ H5Adelete_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     H5_iter_order_t order, hsize_t n, hid_t lapl_id)
 {
     H5G_loc_t	loc;		        /* Object location */
-    H5G_loc_t   obj_loc;                /* Location used to open group */
-    H5G_name_t  obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1600,29 +1482,15 @@ H5Adelete_by_idx(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location */
-    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Delete the attribute from the location */
-    if(H5O_attr_remove_by_idx(obj_loc.oloc, idx_type, order, n, dxpl_id) < 0)
+    if(H5A__delete_by_idx(&loc, obj_name, idx_type, order, n) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
 
 done:
-    /* Release resources */
-    if(loc_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
-
     FUNC_LEAVE_API(ret_value)
 } /* H5Adelete_by_idx() */
 
@@ -1687,15 +1555,15 @@ H5Aexists(hid_t obj_id, const char *attr_name)
     H5TRACE2("t", "i*s", obj_id, attr_name);
 
     /* check arguments */
-    if(H5I_ATTR == H5I_get_type(obj_id))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
-    if(H5G_loc(obj_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(!attr_name || !*attr_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
+    if (H5I_ATTR == H5I_get_type(obj_id))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
+    if (H5G_loc(obj_id, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+    if (!attr_name || !*attr_name)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
 
     /* Check if the attribute exists */
-    if((ret_value = H5O_attr_exists(loc.oloc, attr_name, H5AC_ind_read_dxpl_id)) < 0)
+    if((ret_value = H5A__exists(&loc, attr_name)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
 
 done:
@@ -1721,27 +1589,26 @@ H5Aexists_by_name(hid_t loc_id, const char *obj_name, const char *attr_name,
     hid_t lapl_id)
 {
     H5G_loc_t   loc;                    /* Object location */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;     /* dxpl used by library */
     htri_t	ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("t", "i*s*si", loc_id, obj_name, attr_name, lapl_id);
 
     /* check arguments */
-    if(H5I_ATTR == H5I_get_type(loc_id))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
-    if(H5G_loc(loc_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(!obj_name || !*obj_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
-    if(!attr_name || !*attr_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
-
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    if((ret_value = H5A_exists_by_name(loc, obj_name, attr_name, lapl_id, dxpl_id)) < 0)
+    if (H5I_ATTR == H5I_get_type(loc_id))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
+    if (H5G_loc(loc_id, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+    if (!obj_name || !*obj_name)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name")
+    if (!attr_name || !*attr_name)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no attribute name")
+
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    if ((ret_value = H5A__exists_by_name(loc, obj_name, attr_name)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
 
 done:
diff --git a/src/H5AC.c b/src/H5AC.c
index e2271c5..5eccf9e 100644
--- a/src/H5AC.c
+++ b/src/H5AC.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -41,6 +39,7 @@
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACpkg.h"		/* Metadata cache			*/
 #include "H5Cprivate.h"		/* Cache                                */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"		/* Files				*/
 #include "H5FDprivate.h"	/* File drivers				*/
@@ -68,7 +67,7 @@ static herr_t H5AC__check_if_write_permitted(const H5F_t *f,
 static herr_t H5AC__ext_config_2_int_config(H5AC_cache_config_t *ext_conf_ptr,
     H5C_auto_size_ctl_t *int_conf_ptr);
 #if H5AC_DO_TAGGING_SANITY_CHECKS
-static herr_t H5AC__verify_tag(hid_t dxpl_id, const H5AC_class_t * type);
+static herr_t H5AC__verify_tag(const H5AC_class_t * type);
 #endif /* H5AC_DO_TAGGING_SANITY_CHECKS */
 
 
@@ -83,20 +82,6 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
 /* Library Private Variables */
 /*****************************/
 
-/* Default dataset transfer property list for metadata I/O calls (coll write, ind read) */
-hid_t H5AC_ind_read_dxpl_id = (-1);
-#ifdef H5_HAVE_PARALLEL
-/* collective metadata read property */
-hid_t H5AC_coll_read_dxpl_id = (-1);
-#endif /* H5_HAVE_PARALLEL */
-
-/* DXPL to be used in operations that will not result in I/O calls */
-hid_t H5AC_noio_dxpl_id = (-1);
-
-/* Default DXPL to be used for raw data I/O operations when one is not
-   provided by the user (fill values in H5Dcreate) */
-hid_t H5AC_rawdata_dxpl_id = (-1);
-
 #ifdef H5_HAVE_PARALLEL
 /* Environment variable for collective API sanity checks */
 hbool_t H5_coll_api_sanity_check_g = false;
@@ -189,18 +174,7 @@ done:
 herr_t
 H5AC__init_package(void)
 {
-#if defined H5_DEBUG_BUILD | defined H5_HAVE_PARALLEL
-    H5P_genplist_t  *xfer_plist;    /* Dataset transfer property list object */
-#endif /* defined H5_DEBUG_BUILD | defined H5_HAVE_PARALLEL */
-#ifdef H5_DEBUG_BUILD
-    H5FD_dxpl_type_t  dxpl_type;    /* Property indicating the type of the internal dxpl */
-#endif /* H5_DEBUG_BUILD */
-#ifdef H5_HAVE_PARALLEL
-    H5P_coll_md_read_flag_t coll_meta_read;
-#endif /* H5_HAVE_PARALLEL */
-    herr_t ret_value = SUCCEED;     /* Return value */
-
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_NOERR
 
 #ifdef H5_HAVE_PARALLEL
     /* check whether to enable strict collective function calling
@@ -214,81 +188,7 @@ H5AC__init_package(void)
     }
 #endif /* H5_HAVE_PARALLEL */
 
-#if defined(H5_HAVE_PARALLEL) || defined(H5_DEBUG_BUILD)
-    /* Get an ID for the internal independent metadata dxpl */
-    if((H5AC_ind_read_dxpl_id = H5P_create_id(H5P_CLS_DATASET_XFER_g, FALSE)) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTCREATE, FAIL, "unable to register property list")
-
-    /* Get an ID for the no I/O internal dxpl */
-    if((H5AC_noio_dxpl_id = H5P_create_id(H5P_CLS_DATASET_XFER_g, FALSE)) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTCREATE, FAIL, "unable to register property list")
-
-    /* Get an ID for the raw data (H5AC) dxpl */
-    if((H5AC_rawdata_dxpl_id = H5P_create_id(H5P_CLS_DATASET_XFER_g, FALSE)) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTCREATE, FAIL, "unable to register property list")
-
-    /* if this is a debug build, set the dxpl type flag on the
-       independent metadata dxpl and create the noio and raw data internal dxpls */
-#ifdef H5_DEBUG_BUILD
-    /* Get the property list object */
-    if (NULL == (xfer_plist = (H5P_genplist_t *)H5I_object(H5AC_ind_read_dxpl_id)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get new property list object")
-    /* Insert the dxpl type property  */
-    dxpl_type = H5FD_METADATA_DXPL;
-    if(H5P_set(xfer_plist, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set dxpl type property")
-
-    /* Get the property list object */
-    if (NULL == (xfer_plist = (H5P_genplist_t *)H5I_object(H5AC_noio_dxpl_id)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get new property list object")
-    /* Insert the dxpl type property  */
-    dxpl_type = H5FD_NOIO_DXPL;
-    if(H5P_set(xfer_plist, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set dxpl type property")
-
-    /* Get the property list object */
-    if (NULL == (xfer_plist = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get new property list object")
-    /* Insert the dxpl type property  */
-    dxpl_type = H5FD_RAWDATA_DXPL;
-    if(H5P_set(xfer_plist, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set dxpl type property")
-#endif /* H5_DEBUG_BUILD */
-
-    /* if this is a parallel build, create an internal dxpl for
-       collective metadata reads */
-#ifdef H5_HAVE_PARALLEL
-    /* Get an ID for H5AC_coll_read_dxpl_id */
-    if((H5AC_coll_read_dxpl_id = H5P_create_id(H5P_CLS_DATASET_XFER_g, FALSE)) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTCREATE, FAIL, "unable to register property list")
-    /* Get the property list object */
-    if (NULL == (xfer_plist = (H5P_genplist_t *)H5I_object(H5AC_coll_read_dxpl_id)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get new property list object")
-    /* set 'collective metadata read' property */
-    coll_meta_read = H5P_USER_TRUE;
-    if(H5P_set(xfer_plist, H5_COLL_MD_READ_FLAG_NAME, &coll_meta_read) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set collective metadata read flag")
-
-    /* if we have a debug build, set the dxpl type to metadata on the
-       collective metadata dxpl */
-#ifdef H5_DEBUG_BUILD
-    /* set metadata dxpl type */
-    dxpl_type = H5FD_METADATA_DXPL;
-    if(H5P_set(xfer_plist, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set dxpl type property")
-#endif /* H5_DEBUG_BUILD */
-#endif /* H5_HAVE_PARALLEL */
-
-#else /* defined(H5_HAVE_PARALLEL) || defined(H5_DEBUG_BUILD) */
-    H5AC_ind_read_dxpl_id = H5P_DATASET_XFER_DEFAULT;
-    H5AC_noio_dxpl_id = H5P_DATASET_XFER_DEFAULT;
-    H5AC_rawdata_dxpl_id = H5P_DATASET_XFER_DEFAULT;
-#endif /* defined(H5_HAVE_PARALLEL) || defined(H5_DEBUG_BUILD) */
-
-#if defined(H5_DEBUG_BUILD) | defined(H5_HAVE_PARALLEL)
-done:
-#endif /* defined(H5_DEBUG_BUILD) | defined(H5_HAVE_PARALLEL) */
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5AC__init_package() */
 
 
@@ -309,46 +209,13 @@ done:
 int
 H5AC_term_package(void)
 {
-    int	n = 0;
-
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    if(H5_PKG_INIT_VAR) {
-        if(H5AC_ind_read_dxpl_id > 0 || H5AC_noio_dxpl_id > 0 || H5AC_rawdata_dxpl_id > 0
-#ifdef H5_HAVE_PARALLEL
-           || H5AC_coll_read_dxpl_id > 0
-#endif /* H5_HAVE_PARALLEL */
-           ) {
-#if defined(H5_HAVE_PARALLEL) || defined(H5_DEBUG_BUILD)
-            /* Indicate more work to do */
-            n = 1; /* H5I */
-
-            /* Close H5AC dxpls */
-            if(H5I_dec_ref(H5AC_ind_read_dxpl_id) < 0 ||
-               H5I_dec_ref(H5AC_noio_dxpl_id) < 0 ||
-               H5I_dec_ref(H5AC_rawdata_dxpl_id) < 0
-#ifdef H5_HAVE_PARALLEL
-               || H5I_dec_ref(H5AC_coll_read_dxpl_id) < 0
-#endif /* H5_HAVE_PARALLEL */
-               )
-                H5E_clear_stack(NULL); /*ignore error*/
-#endif /* defined(H5_HAVE_PARALLEL) || defined(H5_DEBUG_BUILD) */
-
-            /* Reset static IDs */
-            H5AC_ind_read_dxpl_id = (-1);
-            H5AC_noio_dxpl_id = (-1);
-            H5AC_rawdata_dxpl_id = (-1);
-#ifdef H5_HAVE_PARALLEL
-            H5AC_coll_read_dxpl_id = (-1);
-#endif /* H5_HAVE_PARALLEL */
-        } /* end if */
-
+    if(H5_PKG_INIT_VAR)
         /* Reset interface initialization flag */
-        if(0 == n)
-            H5_PKG_INIT_VAR = FALSE;
-    } /* end if */
+        H5_PKG_INIT_VAR = FALSE;
 
-    FUNC_LEAVE_NOAPI(n)
+    FUNC_LEAVE_NOAPI(0)
 } /* end H5AC_term_package() */
 
 
@@ -600,7 +467,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_dest(H5F_t *f, hid_t dxpl_id)
+H5AC_dest(H5F_t *f)
 {
 #ifdef H5_HAVE_PARALLEL
     H5AC_aux_t * aux_ptr = NULL;
@@ -648,15 +515,13 @@ H5AC_dest(H5F_t *f, hid_t dxpl_id)
      * Must not flush in the R/O case, as this will trigger the 
      * free space manager settle routines.
      */
-    if ( ( H5F_ACC_RDWR & H5F_INTENT(f) ) && 
-         ( H5AC__flush_entries(f, dxpl_id) < 0 ) )
-
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush")
-
+    if(H5F_ACC_RDWR & H5F_INTENT(f))
+        if(H5AC__flush_entries(f) < 0)
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush")
 #endif /* H5_HAVE_PARALLEL */
 
     /* Destroy the cache */
-    if(H5C_dest(f, dxpl_id) < 0)
+    if(H5C_dest(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "can't destroy cache")
     f->shared->cache = NULL;
 
@@ -698,7 +563,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_evict(H5F_t *f, hid_t dxpl_id)
+H5AC_evict(H5F_t *f)
 {
     hbool_t log_enabled;             /* TRUE if logging was set up */
     hbool_t curr_logging;            /* TRUE if currently logging */
@@ -716,7 +581,7 @@ H5AC_evict(H5F_t *f, hid_t dxpl_id)
         HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "unable to get logging status")
 
     /* Evict all entries in the cache except the pinned superblock entry */
-    if(H5C_evict(f, dxpl_id) < 0)
+    if(H5C_evict(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "can't evict cache")
 
 done:
@@ -745,8 +610,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_expunge_entry(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type,
-    haddr_t addr, unsigned flags)
+H5AC_expunge_entry(H5F_t *f, const H5AC_class_t *type, haddr_t addr,
+    unsigned flags)
 {
 #if H5AC__TRACE_FILE_ENABLED
     char                trace[128] = "";
@@ -783,7 +648,7 @@ H5AC_expunge_entry(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type,
 }
 #endif /* H5AC__TRACE_FILE_ENABLED */
 
-    if(H5C_expunge_entry(f, dxpl_id, type, addr, flags) < 0)
+    if(H5C_expunge_entry(f, type, addr, flags) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTEXPUNGE, FAIL, "H5C_expunge_entry() failed")
 
 done:
@@ -822,7 +687,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_flush(H5F_t *f, hid_t dxpl_id)
+H5AC_flush(H5F_t *f)
 {
 #if H5AC__TRACE_FILE_ENABLED
     char 	  trace[128] = "";
@@ -857,13 +722,13 @@ H5AC_flush(H5F_t *f, hid_t dxpl_id)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "H5C_clear_coll_entries() failed")
 
     /* Attempt to flush all entries from rank 0 & Bcast clean list to other ranks */
-    if(H5AC__flush_entries(f, dxpl_id) < 0)
+    if(H5AC__flush_entries(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush")
 #endif /* H5_HAVE_PARALLEL */
 
     /* Flush the cache */
     /* (Again, in parallel - writes out the superblock) */
-    if(H5C_flush_cache(f, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(H5C_flush_cache(f, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush cache")
 
 done:
@@ -902,7 +767,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_force_cache_image_load(H5F_t *f, hid_t dxpl_id)
+H5AC_force_cache_image_load(H5F_t *f)
 {
     herr_t ret_value = SUCCEED;      /* Return value */
 
@@ -913,7 +778,7 @@ H5AC_force_cache_image_load(H5F_t *f, hid_t dxpl_id)
     HDassert(f->shared);
     HDassert(f->shared->cache);
 
-    if(H5C_force_cache_image_load(f, dxpl_id) < 0)
+    if(H5C_force_cache_image_load(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, FAIL, "Can't load cache image")
 
 done:
@@ -1005,8 +870,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_insert_entry(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type, haddr_t addr,
-    void *thing, unsigned int flags)
+H5AC_insert_entry(H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *thing,
+    unsigned int flags)
 {
 #if H5AC__TRACE_FILE_ENABLED
     char          	trace[128] = "";
@@ -1050,12 +915,12 @@ H5AC_insert_entry(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type, haddr_t add
 #endif /* H5AC__TRACE_FILE_ENABLED */
 
 #if H5AC_DO_TAGGING_SANITY_CHECKS
-    if(!H5C_get_ignore_tags(f->shared->cache) && H5AC__verify_tag(dxpl_id, type) < 0)
+    if(!H5C_get_ignore_tags(f->shared->cache) && H5AC__verify_tag(type) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, FAIL, "Bad tag value")
 #endif /* H5AC_DO_TAGGING_SANITY_CHECKS */
 
     /* Insert entry into metadata cache */
-    if(H5C_insert_entry(f, dxpl_id, type, addr, thing, flags) < 0)
+    if(H5C_insert_entry(f, type, addr, thing, flags) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTINS, FAIL, "H5C_insert_entry() failed")
 
 #if H5AC__TRACE_FILE_ENABLED
@@ -1075,7 +940,7 @@ H5AC_insert_entry(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type, haddr_t add
 
         /* Check if we should try to flush */
         if(aux_ptr->dirty_bytes >= aux_ptr->dirty_bytes_threshold)
-            if(H5AC__run_sync_point(f, dxpl_id, H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN) < 0)
+            if(H5AC__run_sync_point(f, H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't run sync point")
     } /* end if */
 }
@@ -1433,12 +1298,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_move_entry(H5F_t *f, const H5AC_class_t *type, haddr_t old_addr, 
-                haddr_t new_addr, hid_t 
-#ifndef H5_HAVE_PARALLEL
-H5_ATTR_UNUSED
-#endif /* H5_HAVE_PARALLEL */
-                dxpl_id)
+H5AC_move_entry(H5F_t *f, const H5AC_class_t *type, haddr_t old_addr, haddr_t new_addr)
 {
 #if H5AC__TRACE_FILE_ENABLED
     char          	trace[128] = "";
@@ -1488,7 +1348,7 @@ H5_ATTR_UNUSED
 #ifdef H5_HAVE_PARALLEL
     /* Check if we should try to flush */
     if(NULL != aux_ptr && aux_ptr->dirty_bytes >= aux_ptr->dirty_bytes_threshold)
-        if(H5AC__run_sync_point(f, dxpl_id, H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN) < 0)
+        if(H5AC__run_sync_point(f, H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't run sync point")
 #endif /* H5_HAVE_PARALLEL */
 
@@ -1593,7 +1453,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_prep_for_file_close(H5F_t *f, hid_t dxpl_id)
+H5AC_prep_for_file_close(H5F_t *f)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -1604,7 +1464,7 @@ H5AC_prep_for_file_close(H5F_t *f, hid_t dxpl_id)
     HDassert(f->shared);
     HDassert(f->shared->cache);
 
-    if(H5C_prep_for_file_close(f, dxpl_id) < 0)
+    if(H5C_prep_for_file_close(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "cache prep for file close failed")
 
 done:
@@ -1703,8 +1563,8 @@ done:
  *-------------------------------------------------------------------------
  */
 void *
-H5AC_protect(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type, haddr_t addr,
-    void *udata, unsigned flags)
+H5AC_protect(H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *udata,
+    unsigned flags)
 {
 #if H5AC__TRACE_FILE_ENABLED
     char                trace[128] = "";
@@ -1757,11 +1617,11 @@ H5AC_protect(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type, haddr_t addr,
 #endif /* H5AC__TRACE_FILE_ENABLED */
 
 #if H5AC_DO_TAGGING_SANITY_CHECKS
-    if(!H5C_get_ignore_tags(f->shared->cache) && H5AC__verify_tag(dxpl_id, type) < 0)
+    if(!H5C_get_ignore_tags(f->shared->cache) && H5AC__verify_tag(type) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, NULL, "Bad tag value")
 #endif /* H5AC_DO_TAGGING_SANITY_CHECKS */
 
-    if(NULL == (thing = H5C_protect(f, dxpl_id, type, addr, udata, flags)))
+    if(NULL == (thing = H5C_protect(f, type, addr, udata, flags)))
         HGOTO_ERROR(H5E_CACHE, H5E_CANTPROTECT, NULL, "H5C_protect() failed")
 
 #if H5AC__TRACE_FILE_ENABLED
@@ -2041,8 +1901,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_unprotect(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type, haddr_t addr,
-    void *thing, unsigned flags)
+H5AC_unprotect(H5F_t *f, const H5AC_class_t *type, haddr_t addr, void *thing,
+    unsigned flags)
 {
 #if H5AC__TRACE_FILE_ENABLED
     char                trace[128] = "";
@@ -2113,13 +1973,13 @@ H5AC_unprotect(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type, haddr_t addr,
     } /* end if */
 #endif /* H5_HAVE_PARALLEL */
 
-    if(H5C_unprotect(f, dxpl_id, addr, thing, flags) < 0)
+    if(H5C_unprotect(f, addr, thing, flags) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPROTECT, FAIL, "H5C_unprotect() failed")
 
 #ifdef H5_HAVE_PARALLEL
     /* Check if we should try to flush */
     if((aux_ptr != NULL) && (aux_ptr->dirty_bytes >= aux_ptr->dirty_bytes_threshold))
-        if(H5AC__run_sync_point(f, dxpl_id, H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN) < 0)
+        if(H5AC__run_sync_point(f, H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't run sync point")
 #endif /* H5_HAVE_PARALLEL */
 
@@ -2767,33 +2627,19 @@ done:
  *
  *------------------------------------------------------------------------------
  */
-herr_t
-H5AC_tag(hid_t dxpl_id, haddr_t metadata_tag, haddr_t *prev_tag)
+void
+H5AC_tag(haddr_t metadata_tag, haddr_t *prev_tag)
 {
-    H5P_genplist_t *dxpl;           /* Dataset transfer property list */
-    herr_t ret_value = SUCCEED;     /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check Arguments */
-    if(NULL == (dxpl = (H5P_genplist_t *)H5I_object_verify(dxpl_id, H5I_GENPROP_LST)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADTYPE, FAIL, "not a property list")
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
 
     /* Get the current tag value and return that (if prev_tag is NOT null) */
-    if(prev_tag) {
-        haddr_t tag;                    /* Tag value */
+    if(prev_tag)
+        *prev_tag = H5CX_get_tag();
 
-        if((H5P_get(dxpl, H5AC_TAG_NAME, &tag)) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to query dxpl")
-        *prev_tag = tag;
-    } /* end if */
-
-    /* Set the provided tag in the dxpl_id. */
-    if(H5P_set(dxpl, H5AC_TAG_NAME, &metadata_tag) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set tag in dxpl")
+    /* Set the provided tag */
+    H5CX_set_tag(metadata_tag);
 
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOID
 } /* H5AC_tag */
 
 
@@ -2845,7 +2691,7 @@ done:
  *------------------------------------------------------------------------------
  */
 herr_t
-H5AC_flush_tagged_metadata(H5F_t * f, haddr_t metadata_tag, hid_t dxpl_id)
+H5AC_flush_tagged_metadata(H5F_t *f, haddr_t metadata_tag)
 {
     /* Variable Declarations */
     herr_t ret_value = SUCCEED;
@@ -2858,7 +2704,7 @@ H5AC_flush_tagged_metadata(H5F_t * f, haddr_t metadata_tag, hid_t dxpl_id)
     HDassert(f->shared);
 
     /* Call cache level function to flush metadata entries with specified tag */
-    if(H5C_flush_tagged_entries(f, dxpl_id, metadata_tag) < 0)
+    if(H5C_flush_tagged_entries(f, metadata_tag) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Cannot flush metadata")
 
 done:
@@ -2880,7 +2726,7 @@ done:
  *------------------------------------------------------------------------------
  */
 herr_t
-H5AC_evict_tagged_metadata(H5F_t * f, haddr_t metadata_tag, hbool_t match_global, hid_t dxpl_id)
+H5AC_evict_tagged_metadata(H5F_t *f, haddr_t metadata_tag, hbool_t match_global)
 {
     /* Variable Declarations */
     herr_t ret_value = SUCCEED;
@@ -2893,7 +2739,7 @@ H5AC_evict_tagged_metadata(H5F_t * f, haddr_t metadata_tag, hbool_t match_global
     HDassert(f->shared);
 
     /* Call cache level function to evict metadata entries with specified tag */
-    if(H5C_evict_tagged_entries(f, dxpl_id, metadata_tag, match_global) < 0)
+    if(H5C_evict_tagged_entries(f, metadata_tag, match_global) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Cannot evict metadata")
 
 done:
@@ -2914,7 +2760,7 @@ done:
  *------------------------------------------------------------------------------
  */
 herr_t
-H5AC_expunge_tag_type_metadata(H5F_t *f, hid_t dxpl_id, haddr_t tag, int type_id, unsigned flags)
+H5AC_expunge_tag_type_metadata(H5F_t *f, haddr_t tag, int type_id, unsigned flags)
 {
     /* Variable Declarations */
     herr_t ret_value = SUCCEED;
@@ -2927,7 +2773,7 @@ H5AC_expunge_tag_type_metadata(H5F_t *f, hid_t dxpl_id, haddr_t tag, int type_id
     HDassert(f->shared);
 
     /* Call cache level function to expunge entries with specified tag and type id */
-    if(H5C_expunge_tag_type_metadata(f, dxpl_id, tag, type_id, flags)<0)
+    if(H5C_expunge_tag_type_metadata(f, tag, type_id, flags)<0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Cannot expunge tagged type entries")
 
 done:
@@ -3021,21 +2867,15 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__verify_tag(hid_t dxpl_id, const H5AC_class_t *type)
+H5AC__verify_tag(const H5AC_class_t *type)
 {
-    H5P_genplist_t *dxpl;               /* DXPL for operation */
     haddr_t tag;                        /* Entry tag to validate */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
 
-    /* Get the dataset transfer property list */
-    if(NULL == (dxpl = (H5P_genplist_t *)H5I_object_verify(dxpl_id, H5I_GENPROP_LST)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-
-    /* Get the tag from the DXPL */
-    if((H5P_get(dxpl, H5AC_TAG_NAME, &tag)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to query property value")
+    /* Get the current tag */
+    tag = H5CX_get_tag();
 
     /* Verify legal tag value */
     if(H5C_verify_tag(type->id, tag) < 0)
@@ -3097,67 +2937,23 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-herr_t
-H5AC_set_ring(hid_t dxpl_id, H5AC_ring_t ring, H5P_genplist_t **dxpl,
-    H5AC_ring_t *orig_ring)
+void
+H5AC_set_ring(H5AC_ring_t ring, H5AC_ring_t *orig_ring)
 {
-    herr_t ret_value = SUCCEED;   /* return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    /* Sanity checks */
-    HDassert(dxpl);
-    HDassert(orig_ring);
+    /* Get the current ring value and return that (if orig_ring is NOT null) */
+    if(orig_ring)
+        *orig_ring = H5CX_get_ring();
 
-    /* Set the ring type in the DXPL */
-    if(NULL == ((*dxpl) = (H5P_genplist_t *)H5I_object_verify(dxpl_id, H5I_GENPROP_LST)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-    if((H5P_get((*dxpl), H5AC_RING_NAME, orig_ring)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get original ring value")
-    if((H5P_set((*dxpl), H5AC_RING_NAME, &ring)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set ring value")
+    /* Set the provided ring */
+    H5CX_set_ring(ring);
 
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOID
 } /* end H5AC_set_ring() */
 
 
 /*-------------------------------------------------------------------------
- * Function:       H5AC_reset_ring
- *
- * Purpose:        Routine to reset the original ring on a DXPL (after passing
- *                 through to the metadata cache).
- *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
- *
- * Programmer:     Quincey Koziol
- *                 Tuesday, September 8, 2015
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5AC_reset_ring(H5P_genplist_t *dxpl, H5AC_ring_t orig_ring)
-{
-    herr_t ret_value = SUCCEED;   /* return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Reset the ring in the DXPL, if it's been changed */
-    if(orig_ring) {
-        /* Sanity check */
-        HDassert(dxpl);
-
-        if((H5P_set(dxpl, H5AC_RING_NAME, &orig_ring)) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set property value")
-    } /* end if */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5AC_reset_ring() */
-
-
-/*-------------------------------------------------------------------------
  * Function:    H5AC_unsettle_entry_ring()
  *
  * Purpose:     Advise the metadata cache that the specified entry's metadata
diff --git a/src/H5ACdbg.c b/src/H5ACdbg.c
index 6073288..c6d71a8 100644
--- a/src/H5ACdbg.c
+++ b/src/H5ACdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5AClog.c b/src/H5AClog.c
index 780373e..51a2050 100644
--- a/src/H5AClog.c
+++ b/src/H5AClog.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5ACmodule.h b/src/H5ACmodule.h
index a8dba59..e218b31 100644
--- a/src/H5ACmodule.h
+++ b/src/H5ACmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5ACmpio.c b/src/H5ACmpio.c
index 945aaba..7671abc 100644
--- a/src/H5ACmpio.c
+++ b/src/H5ACmpio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -39,6 +37,7 @@
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACpkg.h"		/* Metadata cache			*/
 #include "H5Cprivate.h"		/* Cache                                */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"		/* Files				*/
 #include "H5MMprivate.h"        /* Memory management                    */
@@ -96,20 +95,19 @@ static herr_t H5AC__construct_candidate_list(H5AC_t *cache_ptr,
     H5AC_aux_t *aux_ptr, int sync_point_op);
 static herr_t H5AC__copy_candidate_list_to_buffer(const H5AC_t *cache_ptr,
     unsigned *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
-static herr_t H5AC__propagate_and_apply_candidate_list(H5F_t  *f, hid_t dxpl_id);
-static herr_t H5AC__propagate_flushed_and_still_clean_entries_list(H5F_t  *f,
-    hid_t dxpl_id);
+static herr_t H5AC__propagate_and_apply_candidate_list(H5F_t  *f);
+static herr_t H5AC__propagate_flushed_and_still_clean_entries_list(H5F_t  *f);
 static herr_t H5AC__receive_haddr_list(MPI_Comm mpi_comm, unsigned *num_entries_ptr,
     haddr_t **haddr_buf_ptr_ptr);
 static herr_t H5AC__receive_candidate_list(const H5AC_t *cache_ptr,
     unsigned *num_entries_ptr, haddr_t **haddr_buf_ptr_ptr);
-static herr_t H5AC__receive_and_apply_clean_list(H5F_t *f, hid_t dxpl_id);
+static herr_t H5AC__receive_and_apply_clean_list(H5F_t *f);
 static herr_t H5AC__tidy_cache_0_lists(H5AC_t *cache_ptr, unsigned num_candidates,
     haddr_t *candidates_list_ptr);
-static herr_t H5AC__rsp__dist_md_write__flush(H5F_t *f, hid_t dxpl_id);
-static herr_t H5AC__rsp__dist_md_write__flush_to_min_clean(H5F_t *f, hid_t dxpl_id);
-static herr_t H5AC__rsp__p0_only__flush(H5F_t *f, hid_t dxpl_id);
-static herr_t H5AC__rsp__p0_only__flush_to_min_clean(H5F_t *f, hid_t dxpl_id);
+static herr_t H5AC__rsp__dist_md_write__flush(H5F_t *f);
+static herr_t H5AC__rsp__dist_md_write__flush_to_min_clean(H5F_t *f);
+static herr_t H5AC__rsp__p0_only__flush(H5F_t *f);
+static herr_t H5AC__rsp__p0_only__flush_to_min_clean(H5F_t *f);
 
 
 /*********************/
@@ -1228,7 +1226,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__propagate_and_apply_candidate_list(H5F_t  *f, hid_t dxpl_id)
+H5AC__propagate_and_apply_candidate_list(H5F_t  *f)
 {
     H5AC_t             * cache_ptr;
     H5AC_aux_t         * aux_ptr;
@@ -1277,7 +1275,7 @@ H5AC__propagate_and_apply_candidate_list(H5F_t  *f, hid_t dxpl_id)
         aux_ptr->write_permitted = TRUE;
 
         /* Apply the candidate list */
-        result = H5C_apply_candidate_list(f, dxpl_id, cache_ptr, num_candidates,
+        result = H5C_apply_candidate_list(f, cache_ptr, num_candidates,
             candidates_list_ptr, aux_ptr->mpi_rank, aux_ptr->mpi_size);
 
         /* Disable writes again */
@@ -1395,7 +1393,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__propagate_flushed_and_still_clean_entries_list(H5F_t  *f, hid_t dxpl_id)
+H5AC__propagate_flushed_and_still_clean_entries_list(H5F_t  *f)
 {
     H5AC_t     * cache_ptr;
     H5AC_aux_t * aux_ptr;
@@ -1417,10 +1415,9 @@ H5AC__propagate_flushed_and_still_clean_entries_list(H5F_t  *f, hid_t dxpl_id)
             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't broadcast clean slist.")
         HDassert(H5SL_count(aux_ptr->c_slist_ptr) == 0);
     } /* end if */
-    else {
-        if(H5AC__receive_and_apply_clean_list(f, dxpl_id) < 0)
+    else
+        if(H5AC__receive_and_apply_clean_list(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't receive and/or process clean slist broadcast.")
-    } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1429,7 +1426,7 @@ done:
 
 /*-------------------------------------------------------------------------
  *
- * Function:    H5AC_receive_haddr_list()
+ * Function:    H5AC__receive_haddr_list()
  *
  * Purpose:     Receive the list of entry addresses from process 0,
  *		and return it in a buffer pointed to by *haddr_buf_ptr_ptr.
@@ -1496,7 +1493,7 @@ done:
             haddr_buf_ptr = (haddr_t *)H5MM_xfree((void *)haddr_buf_ptr);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5AC_receive_haddr_list() */
+} /* H5AC__receive_haddr_list() */
 
 
 /*-------------------------------------------------------------------------
@@ -1518,7 +1515,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__receive_and_apply_clean_list(H5F_t *f, hid_t dxpl_id)
+H5AC__receive_and_apply_clean_list(H5F_t *f)
 {
     H5AC_t             * cache_ptr;
     H5AC_aux_t         * aux_ptr;
@@ -1543,7 +1540,7 @@ H5AC__receive_and_apply_clean_list(H5F_t *f, hid_t dxpl_id)
 
     if(num_entries > 0)
         /* mark the indicated entries as clean */
-        if(H5C_mark_entries_as_clean(f, dxpl_id, num_entries, haddr_buf_ptr) < 0)
+        if(H5C_mark_entries_as_clean(f, num_entries, haddr_buf_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "Can't mark entries clean.")
 
     /* if it is defined, call the sync point done callback.  Note
@@ -1661,7 +1658,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__rsp__dist_md_write__flush(H5F_t *f, hid_t dxpl_id)
+H5AC__rsp__dist_md_write__flush(H5F_t *f)
 {
     H5AC_t     * cache_ptr;
     H5AC_aux_t * aux_ptr;
@@ -1696,15 +1693,20 @@ H5AC__rsp__dist_md_write__flush(H5F_t *f, hid_t dxpl_id)
         if(H5AC__copy_candidate_list_to_buffer(cache_ptr, &num_entries, &haddr_buf_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't construct candidate buffer.")
 
-        /* initial sync point barrier */
-        if(MPI_SUCCESS != (mpi_result = MPI_Barrier(aux_ptr->mpi_comm)))
-            HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_result)
+        /* Initial sync point barrier
+         * 
+         * When flushing from within the close operation from a file,
+         * it's possible to skip this barrier (on the second flush of the cache).
+         */
+        if(!H5CX_get_mpi_file_flushing())
+            if(MPI_SUCCESS != (mpi_result = MPI_Barrier(aux_ptr->mpi_comm)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_result)
 
         /* Enable writes during this operation */
         aux_ptr->write_permitted = TRUE;
 
         /* Apply the candidate list */
-        result = H5C_apply_candidate_list(f, dxpl_id, cache_ptr, num_entries,
+        result = H5C_apply_candidate_list(f, cache_ptr, num_entries,
             haddr_buf_ptr, aux_ptr->mpi_rank, aux_ptr->mpi_size);
 
         /* Disable writes again */
@@ -1803,7 +1805,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__rsp__dist_md_write__flush_to_min_clean(H5F_t *f, hid_t dxpl_id)
+H5AC__rsp__dist_md_write__flush_to_min_clean(H5F_t *f)
 {
     H5AC_t     * cache_ptr;
     H5AC_aux_t * aux_ptr;
@@ -1832,7 +1834,7 @@ H5AC__rsp__dist_md_write__flush_to_min_clean(H5F_t *f, hid_t dxpl_id)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't construct candidate list.")
 
         /* propagate and apply candidate list -- all processes */
-        if(H5AC__propagate_and_apply_candidate_list(f, dxpl_id) < 0)
+        if(H5AC__propagate_and_apply_candidate_list(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't propagate and apply candidate list.")
     } /* evictions enabled */
 
@@ -1878,7 +1880,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__rsp__p0_only__flush(H5F_t *f, hid_t dxpl_id)
+H5AC__rsp__p0_only__flush(H5F_t *f)
 {
     H5AC_t     * cache_ptr;
     H5AC_aux_t * aux_ptr;
@@ -1896,12 +1898,16 @@ H5AC__rsp__p0_only__flush(H5F_t *f, hid_t dxpl_id)
     HDassert(aux_ptr->magic == H5AC__H5AC_AUX_T_MAGIC);
     HDassert(aux_ptr->metadata_write_strategy == H5AC_METADATA_WRITE_STRATEGY__PROCESS_0_ONLY);
 
-    /* to prevent "messages from the future" we must 
+    /* To prevent "messages from the future" we must 
      * synchronize all processes before we start the flush.  
      * Hence the following barrier.
+     *
+     * However, when flushing from within the close operation from a file,
+     * it's possible to skip this barrier (on the second flush of the cache).
      */
-    if(MPI_SUCCESS != (mpi_result = MPI_Barrier(aux_ptr->mpi_comm)))
-        HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_result)
+    if(!H5CX_get_mpi_file_flushing())
+        if(MPI_SUCCESS != (mpi_result = MPI_Barrier(aux_ptr->mpi_comm)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_result)
 
     /* Flush data to disk, from rank 0 process */
     if(aux_ptr->mpi_rank == 0) {
@@ -1911,7 +1917,7 @@ H5AC__rsp__p0_only__flush(H5F_t *f, hid_t dxpl_id)
         aux_ptr->write_permitted = TRUE;
 
         /* Flush the cache */
-        result = H5C_flush_cache(f, dxpl_id, H5AC__NO_FLAGS_SET);
+        result = H5C_flush_cache(f, H5AC__NO_FLAGS_SET);
 
         /* Disable writes again */
         aux_ptr->write_permitted = FALSE;
@@ -1921,7 +1927,7 @@ H5AC__rsp__p0_only__flush(H5F_t *f, hid_t dxpl_id)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush.")
 
         /* this code exists primarily for the test bed -- it allows us to
-         * enforce posix semantics on the server that pretends to be a 
+         * enforce POSIX semantics on the server that pretends to be a 
          * file system in our parallel tests.
          */
         if(aux_ptr->write_done)
@@ -1929,7 +1935,7 @@ H5AC__rsp__p0_only__flush(H5F_t *f, hid_t dxpl_id)
     } /* end if */
 
     /* Propagate cleaned entries to other ranks. */
-    if(H5AC__propagate_flushed_and_still_clean_entries_list(f, dxpl_id) < 0)
+    if(H5AC__propagate_flushed_and_still_clean_entries_list(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't propagate clean entries list.")
 
 done:
@@ -1980,7 +1986,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5AC__rsp__p0_only__flush_to_min_clean(H5F_t *f, hid_t dxpl_id)
+H5AC__rsp__p0_only__flush_to_min_clean(H5F_t *f)
 {
     H5AC_t     * cache_ptr;
     H5AC_aux_t * aux_ptr;
@@ -2032,7 +2038,7 @@ H5AC__rsp__p0_only__flush_to_min_clean(H5F_t *f, hid_t dxpl_id)
             aux_ptr->write_permitted = TRUE;
 
             /* Flush the cache */
-            result = H5C_flush_to_min_clean(f, dxpl_id);
+            result = H5C_flush_to_min_clean(f);
 
             /* Disable writes again */
             aux_ptr->write_permitted = FALSE;
@@ -2049,7 +2055,7 @@ H5AC__rsp__p0_only__flush_to_min_clean(H5F_t *f, hid_t dxpl_id)
                 (aux_ptr->write_done)();
         } /* end if */
 
-        if(H5AC__propagate_flushed_and_still_clean_entries_list(f, dxpl_id) < 0)
+        if(H5AC__propagate_flushed_and_still_clean_entries_list(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't propagate clean entries list.")
     } /* end if */
 
@@ -2090,7 +2096,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC__run_sync_point(H5F_t *f, hid_t dxpl_id, int sync_point_op)
+H5AC__run_sync_point(H5F_t *f, int sync_point_op)
 {
     H5AC_t     * cache_ptr;
     H5AC_aux_t * aux_ptr;
@@ -2132,12 +2138,12 @@ HDfprintf(stdout, "%d:H5AC_propagate...:%u: (u/uu/i/iu/r/ru) = %zu/%u/%zu/%u/%zu
         case H5AC_METADATA_WRITE_STRATEGY__PROCESS_0_ONLY:
 	    switch(sync_point_op) {
                 case H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN:
-	            if(H5AC__rsp__p0_only__flush_to_min_clean(f, dxpl_id) < 0)
+	            if(H5AC__rsp__p0_only__flush_to_min_clean(f) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "H5AC__rsp__p0_only__flush_to_min_clean() failed.")
 		    break;
 
 		case H5AC_SYNC_POINT_OP__FLUSH_CACHE:
-	            if(H5AC__rsp__p0_only__flush(f, dxpl_id) < 0)
+	            if(H5AC__rsp__p0_only__flush(f) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "H5AC__rsp__p0_only__flush() failed.")
 		    break;
 
@@ -2150,12 +2156,12 @@ HDfprintf(stdout, "%d:H5AC_propagate...:%u: (u/uu/i/iu/r/ru) = %zu/%u/%zu/%u/%zu
 	case H5AC_METADATA_WRITE_STRATEGY__DISTRIBUTED:
 	    switch(sync_point_op) {
                 case H5AC_SYNC_POINT_OP__FLUSH_TO_MIN_CLEAN:
-	            if(H5AC__rsp__dist_md_write__flush_to_min_clean(f, dxpl_id) < 0)
+	            if(H5AC__rsp__dist_md_write__flush_to_min_clean(f) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "H5AC__rsp__dist_md_write__flush_to_min_clean() failed.")
 		    break;
 
 		case H5AC_SYNC_POINT_OP__FLUSH_CACHE:
-	            if(H5AC__rsp__dist_md_write__flush(f, dxpl_id) < 0)
+	            if(H5AC__rsp__dist_md_write__flush(f) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "H5AC__rsp__dist_md_write__flush() failed.")
 		    break;
 
@@ -2286,7 +2292,7 @@ H5AC__tidy_cache_0_lists(H5AC_t *cache_ptr, unsigned num_candidates,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC__flush_entries(H5F_t *f, hid_t dxpl_id)
+H5AC__flush_entries(H5F_t *f)
 {
     herr_t        ret_value = SUCCEED;      /* Return value */
 
@@ -2298,7 +2304,7 @@ H5AC__flush_entries(H5F_t *f, hid_t dxpl_id)
 
     /* Check if we have >1 ranks */
     if(H5C_get_aux_ptr(f->shared->cache))
-        if(H5AC__run_sync_point(f, dxpl_id, H5AC_SYNC_POINT_OP__FLUSH_CACHE) < 0)
+        if(H5AC__run_sync_point(f, H5AC_SYNC_POINT_OP__FLUSH_CACHE) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't run sync point.")
 
 done:
diff --git a/src/H5ACpkg.h b/src/H5ACpkg.h
index 77ba0ae..409d914 100644
--- a/src/H5ACpkg.h
+++ b/src/H5ACpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -427,8 +425,8 @@ H5_DLL herr_t H5AC__log_flushed_entry(H5C_t *cache_ptr, haddr_t addr,
 H5_DLL herr_t H5AC__log_inserted_entry(const H5AC_info_t *entry_ptr);
 H5_DLL herr_t H5AC__log_moved_entry(const H5F_t *f, haddr_t old_addr,
     haddr_t new_addr);
-H5_DLL herr_t H5AC__flush_entries(H5F_t *f, hid_t dxpl_id);
-H5_DLL herr_t H5AC__run_sync_point(H5F_t *f, hid_t dxpl_id, int sync_point_op);
+H5_DLL herr_t H5AC__flush_entries(H5F_t *f);
+H5_DLL herr_t H5AC__run_sync_point(H5F_t *f, int sync_point_op);
 H5_DLL herr_t H5AC__set_sync_point_done_callback(H5C_t *cache_ptr,
     void (*sync_point_done)(unsigned num_writes, haddr_t *written_entries_tbl));
 H5_DLL herr_t H5AC__set_write_done_callback(H5C_t * cache_ptr,
diff --git a/src/H5ACprivate.h b/src/H5ACprivate.h
index a724394..99cc0e9 100644
--- a/src/H5ACprivate.h
+++ b/src/H5ACprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -52,11 +50,6 @@
 #define H5AC__SOHM_TAG         (haddr_t)5
 #define H5AC__GLOBALHEAP_TAG   (haddr_t)6
 
-/* Definitions for cache "tag" property */
-#define H5AC_TAG_NAME          "H5AC_tag"
-#define H5AC_TAG_SIZE          sizeof(haddr_t)
-#define H5AC_TAG_DEF           (H5AC__INVALID_TAG)
-
 /* Types of metadata objects cached */
 typedef enum {
     H5AC_BT_ID = 0,             /* ( 0) B-tree nodes                                */
@@ -232,24 +225,7 @@ typedef struct H5AC_proxy_entry_t {
                                         /* (Note that this currently duplicates some cache functionality) */
 } H5AC_proxy_entry_t;
 
-
-#define H5AC_RING_NAME  "H5AC_ring_type"
-
-/* Dataset transfer property lists for metadata calls */
-H5_DLLVAR hid_t H5AC_ind_read_dxpl_id;
-#ifdef H5_HAVE_PARALLEL
-H5_DLLVAR hid_t H5AC_coll_read_dxpl_id;
-#endif /* H5_HAVE_PARALLEL */
-
-/* DXPL to be used in operations that will not result in I/O calls */
-H5_DLLVAR hid_t H5AC_noio_dxpl_id;
-
-/* DXPL to be used for raw data I/O operations when one is not
-   provided by the user (fill values in H5Dcreate) */
-H5_DLLVAR hid_t H5AC_rawdata_dxpl_id;
-
 /* Default cache configuration. */
-
 #define H5AC__DEFAULT_METADATA_WRITE_STRATEGY   \
                                 H5AC_METADATA_WRITE_STRATEGY__DISTRIBUTED
 
@@ -413,29 +389,29 @@ H5_DLL herr_t H5AC_create(const H5F_t *f, H5AC_cache_config_t *config_ptr,
     H5AC_cache_image_config_t * image_config_ptr);
 H5_DLL herr_t H5AC_get_entry_status(const H5F_t *f, haddr_t addr,
     unsigned *status_ptr);
-H5_DLL herr_t H5AC_insert_entry(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type,
+H5_DLL herr_t H5AC_insert_entry(H5F_t *f, const H5AC_class_t *type,
     haddr_t addr, void *thing, unsigned int flags);
 H5_DLL herr_t H5AC_pin_protected_entry(void *thing);
-H5_DLL herr_t H5AC_prep_for_file_close(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5AC_prep_for_file_close(H5F_t *f);
 H5_DLL herr_t H5AC_create_flush_dependency(void *parent_thing, void *child_thing);
-H5_DLL void * H5AC_protect(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type,
-    haddr_t addr, void *udata, unsigned flags);
+H5_DLL void * H5AC_protect(H5F_t *f, const H5AC_class_t *type, haddr_t addr,
+    void *udata, unsigned flags);
 H5_DLL herr_t H5AC_resize_entry(void *thing, size_t new_size);
 H5_DLL herr_t H5AC_unpin_entry(void *thing);
 H5_DLL herr_t H5AC_destroy_flush_dependency(void *parent_thing, void *child_thing);
-H5_DLL herr_t H5AC_unprotect(H5F_t *f, hid_t dxpl_id, const H5AC_class_t *type,
-    haddr_t addr, void *thing, unsigned flags);
-H5_DLL herr_t H5AC_flush(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5AC_unprotect(H5F_t *f, const H5AC_class_t *type, haddr_t addr,
+    void *thing, unsigned flags);
+H5_DLL herr_t H5AC_flush(H5F_t *f);
 H5_DLL herr_t H5AC_mark_entry_dirty(void *thing);
 H5_DLL herr_t H5AC_mark_entry_clean(void *thing);
 H5_DLL herr_t H5AC_mark_entry_unserialized(void *thing);
 H5_DLL herr_t H5AC_mark_entry_serialized(void *thing);
 H5_DLL herr_t H5AC_move_entry(H5F_t *f, const H5AC_class_t *type,
-    haddr_t old_addr, haddr_t new_addr, hid_t dxpl_id);
-H5_DLL herr_t H5AC_dest(H5F_t *f, hid_t dxpl_id);
-H5_DLL herr_t H5AC_evict(H5F_t *f, hid_t dxpl_id);
-H5_DLL herr_t H5AC_expunge_entry(H5F_t *f, hid_t dxpl_id,
-    const H5AC_class_t *type, haddr_t addr, unsigned flags);
+    haddr_t old_addr, haddr_t new_addr);
+H5_DLL herr_t H5AC_dest(H5F_t *f);
+H5_DLL herr_t H5AC_evict(H5F_t *f);
+H5_DLL herr_t H5AC_expunge_entry(H5F_t *f, const H5AC_class_t *type,
+    haddr_t addr, unsigned flags);
 H5_DLL herr_t H5AC_remove_entry(void *entry);
 H5_DLL herr_t H5AC_get_cache_auto_resize_config(const H5AC_t * cache_ptr,
     H5AC_cache_config_t *config_ptr);
@@ -452,24 +428,23 @@ H5_DLL herr_t H5AC_load_cache_image_on_next_protect(H5F_t *f, haddr_t addr,
     hsize_t len, hbool_t rw);
 H5_DLL herr_t H5AC_validate_cache_image_config(H5AC_cache_image_config_t *config_ptr);
 H5_DLL hbool_t H5AC_cache_image_pending(const H5F_t *f);
-H5_DLL herr_t H5AC_force_cache_image_load(H5F_t * f, hid_t dxpl_id);
+H5_DLL herr_t H5AC_force_cache_image_load(H5F_t * f);
 H5_DLL herr_t H5AC_get_mdc_image_info(H5AC_t *cache_ptr, haddr_t *image_addr,
     hsize_t *image_len);
 
 /* Tag & Ring routines */
-H5_DLL herr_t H5AC_tag(hid_t dxpl_id, haddr_t metadata_tag, haddr_t *prev_tag);
-H5_DLL herr_t H5AC_flush_tagged_metadata(H5F_t * f, haddr_t metadata_tag, hid_t dxpl_id);
-H5_DLL herr_t H5AC_evict_tagged_metadata(H5F_t * f, haddr_t metadata_tag, hbool_t match_global, hid_t dxpl_id);
+H5_DLL void H5AC_tag(haddr_t metadata_tag, haddr_t *prev_tag);
+H5_DLL herr_t H5AC_flush_tagged_metadata(H5F_t *f, haddr_t metadata_tag);
+H5_DLL herr_t H5AC_evict_tagged_metadata(H5F_t * f, haddr_t metadata_tag, hbool_t match_global);
 H5_DLL herr_t H5AC_retag_copied_metadata(const H5F_t *f, haddr_t metadata_tag);
 H5_DLL herr_t H5AC_ignore_tags(const H5F_t *f);
 H5_DLL herr_t H5AC_cork(H5F_t *f, haddr_t obj_addr, unsigned action, hbool_t *corked);
 H5_DLL herr_t H5AC_get_entry_ring(const H5F_t *f, haddr_t addr, H5AC_ring_t *ring);
-H5_DLL herr_t H5AC_set_ring(hid_t dxpl_id, H5AC_ring_t ring, H5P_genplist_t **dxpl,
-    H5AC_ring_t *orig_ring);
-H5_DLL herr_t H5AC_reset_ring(H5P_genplist_t *dxpl, H5AC_ring_t orig_ring);
+H5_DLL void H5AC_set_ring(H5AC_ring_t ring, H5AC_ring_t *orig_ring);
 H5_DLL herr_t H5AC_unsettle_entry_ring(void *entry);
 H5_DLL herr_t H5AC_unsettle_ring(H5F_t * f, H5AC_ring_t ring);
-H5_DLL herr_t H5AC_expunge_tag_type_metadata(H5F_t *f, hid_t dxpl_id, haddr_t tag, int type_id, unsigned flags);
+H5_DLL herr_t H5AC_expunge_tag_type_metadata(H5F_t *f, haddr_t tag, int type_id,
+    unsigned flags);
 H5_DLL herr_t H5AC_get_tag(const void *thing, /*OUT*/ haddr_t *tag);
 
 /* Virtual entry routines */
@@ -477,7 +452,7 @@ H5_DLL H5AC_proxy_entry_t *H5AC_proxy_entry_create(void);
 H5_DLL herr_t H5AC_proxy_entry_add_parent(H5AC_proxy_entry_t *pentry, void *parent);
 H5_DLL herr_t H5AC_proxy_entry_remove_parent(H5AC_proxy_entry_t *pentry, void *parent);
 H5_DLL herr_t H5AC_proxy_entry_add_child(H5AC_proxy_entry_t *pentry, H5F_t *f,
-    hid_t dxpl_id, void *child);
+    void *child);
 H5_DLL herr_t H5AC_proxy_entry_remove_child(H5AC_proxy_entry_t *pentry, void *child);
 H5_DLL herr_t H5AC_proxy_entry_dest(H5AC_proxy_entry_t *pentry);
 
diff --git a/src/H5ACproxy_entry.c b/src/H5ACproxy_entry.c
index cee9b72..498d023 100644
--- a/src/H5ACproxy_entry.c
+++ b/src/H5ACproxy_entry.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -286,8 +284,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5AC_proxy_entry_add_child(H5AC_proxy_entry_t *pentry, H5F_t *f, hid_t dxpl_id,
-    void *child)
+H5AC_proxy_entry_add_child(H5AC_proxy_entry_t *pentry, H5F_t *f, void *child)
 {
     herr_t ret_value = SUCCEED;         	/* Return value */
 
@@ -305,7 +302,7 @@ H5AC_proxy_entry_add_child(H5AC_proxy_entry_t *pentry, H5F_t *f, hid_t dxpl_id,
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "temporary file space allocation failed for proxy entry")
 
         /* Insert the proxy entry into the cache */
-        if(H5AC_insert_entry(f, dxpl_id, H5AC_PROXY_ENTRY, pentry->addr, pentry, H5AC__PIN_ENTRY_FLAG) < 0)
+        if(H5AC_insert_entry(f, H5AC_PROXY_ENTRY, pentry->addr, pentry, H5AC__PIN_ENTRY_FLAG) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTINSERT, FAIL, "unable to cache proxy entry")
 
         /* Proxies start out clean (insertions are automatically marked dirty) */
diff --git a/src/H5ACpublic.h b/src/H5ACpublic.h
index 5fdb3f4..654a877 100644
--- a/src/H5ACpublic.h
+++ b/src/H5ACpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -70,65 +68,65 @@ extern "C" {
  *      version number, or an error will be flagged.
  *
  * rpt_fcn_enabled: Boolean field used to enable and disable the default
- *	reporting function.  This function is invoked every time the
- *	automatic cache resize code is run, and reports on its activities.
+ *    reporting function.  This function is invoked every time the
+ *    automatic cache resize code is run, and reports on its activities.
  *
- *	This is a debugging function, and should normally be turned off.
+ *    This is a debugging function, and should normally be turned off.
  *
  * open_trace_file: Boolean field indicating whether the trace_file_name
- * 	field should be used to open a trace file for the cache.
+ *     field should be used to open a trace file for the cache.
  *
  *      *** DEPRECATED *** Use H5Fstart/stop logging functions instead
  *
- * 	The trace file is a debuging feature that allow the capture of
- * 	top level metadata cache requests for purposes of debugging and/or
- * 	optimization.  This field should normally be set to FALSE, as
- * 	trace file collection imposes considerable overhead.
+ *     The trace file is a debuging feature that allow the capture of
+ *     top level metadata cache requests for purposes of debugging and/or
+ *     optimization.  This field should normally be set to FALSE, as
+ *     trace file collection imposes considerable overhead.
  *
- * 	This field should only be set to TRUE when the trace_file_name
- * 	contains the full path of the desired trace file, and either
- * 	there is no open trace file on the cache, or the close_trace_file
- * 	field is also TRUE.
+ *     This field should only be set to TRUE when the trace_file_name
+ *     contains the full path of the desired trace file, and either
+ *     there is no open trace file on the cache, or the close_trace_file
+ *     field is also TRUE.
  *
  * close_trace_file: Boolean field indicating whether the current trace
- * 	file (if any) should be closed.
+ *     file (if any) should be closed.
  *
  *      *** DEPRECATED *** Use H5Fstart/stop logging functions instead
  *
- * 	See the above comments on the open_trace_file field.  This field
- * 	should be set to FALSE unless there is an open trace file on the
- * 	cache that you wish to close.
+ *     See the above comments on the open_trace_file field.  This field
+ *     should be set to FALSE unless there is an open trace file on the
+ *     cache that you wish to close.
  *
  * trace_file_name: Full path of the trace file to be opened if the
- * 	open_trace_file field is TRUE.
+ *     open_trace_file field is TRUE.
  *
  *      *** DEPRECATED *** Use H5Fstart/stop logging functions instead
  *
- * 	In the parallel case, an ascii representation of the mpi rank of
- * 	the process will be appended to the file name to yield a unique
- * 	trace file name for each process.
+ *     In the parallel case, an ascii representation of the mpi rank of
+ *     the process will be appended to the file name to yield a unique
+ *     trace file name for each process.
  *
- * 	The length of the path must not exceed H5AC__MAX_TRACE_FILE_NAME_LEN
- * 	characters.
+ *     The length of the path must not exceed H5AC__MAX_TRACE_FILE_NAME_LEN
+ *     characters.
  *
  * evictions_enabled:  Boolean field used to either report the current
- * 	evictions enabled status of the cache, or to set the cache's
- *	evictions enabled status.
- *
- * 	In general, the metadata cache should always be allowed to
- * 	evict entries.  However, in some cases it is advantageous to
- * 	disable evictions briefly, and thereby postpone metadata
- * 	writes.  However, this must be done with care, as the cache
- * 	can grow quickly.  If you do this, re-enable evictions as
- * 	soon as possible and monitor cache size.
- *
- * 	At present, evictions can only be disabled if automatic
- * 	cache resizing is also disabled (that is, ( incr_mode ==
- *	H5C_incr__off ) && ( decr_mode == H5C_decr__off )).  There
- *	is no logical reason why this should be so, but it simplifies
- *	implementation and testing, and I can't think of any reason
- *	why it would be desireable.  If you can think of one, I'll
- *	revisit the issue.
+ *     evictions enabled status of the cache, or to set the cache's
+ *    evictions enabled status.
+ *
+ *     In general, the metadata cache should always be allowed to
+ *     evict entries.  However, in some cases it is advantageous to
+ *     disable evictions briefly, and thereby postpone metadata
+ *     writes.  However, this must be done with care, as the cache
+ *     can grow quickly.  If you do this, re-enable evictions as
+ *     soon as possible and monitor cache size.
+ *
+ *     At present, evictions can only be disabled if automatic
+ *     cache resizing is also disabled (that is, ( incr_mode ==
+ *    H5C_incr__off ) && ( decr_mode == H5C_decr__off )).  There
+ *    is no logical reason why this should be so, but it simplifies
+ *    implementation and testing, and I can't think of any reason
+ *    why it would be desireable.  If you can think of one, I'll
+ *    revisit the issue.
  *
  * set_initial_size: Boolean flag indicating whether the size of the
  *      initial size of the cache is to be set to the value given in
@@ -368,80 +366,80 @@ extern "C" {
  *
  * PHDF5 uses several strategies to prevent such inconsistencies in metadata,
  * all of which use the fact that the same stream of dirty metadata is seen
- * by all processes for purposes of synchronization.  This is done by 
+ * by all processes for purposes of synchronization.  This is done by
  * having each process count the number of bytes of dirty metadata generated,
- * and then running a "sync point" whenever this count exceeds a user 
+ * and then running a "sync point" whenever this count exceeds a user
  * specified threshold (see dirty_bytes_threshold below).
  *
- * The current metadata write strategy is indicated by the 
+ * The current metadata write strategy is indicated by the
  * metadata_write_strategy field.  The possible values of this field, along
  * with the associated metadata write strategies are discussed below.
  *
  * dirty_bytes_threshold:  Threshold of dirty byte creation used to
- * 	synchronize updates between caches. (See above for outline and
- *	motivation.)
+ *     synchronize updates between caches. (See above for outline and
+ *    motivation.)
  *
- *	This value MUST be consistant across all processes accessing the
- *	file.  This field is ignored unless HDF5 has been compiled for
- *	parallel.
+ *    This value MUST be consistant across all processes accessing the
+ *    file.  This field is ignored unless HDF5 has been compiled for
+ *    parallel.
  *
  * metadata_write_strategy: Integer field containing a code indicating the
- *	desired metadata write strategy.  The valid values of this field
- *	are enumerated and discussed below:
+ *    desired metadata write strategy.  The valid values of this field
+ *    are enumerated and discussed below:
  *
  *
- *	H5AC_METADATA_WRITE_STRATEGY__PROCESS_0_ONLY:
+ *    H5AC_METADATA_WRITE_STRATEGY__PROCESS_0_ONLY:
  *
- *	When metadata_write_strategy is set to this value, only process 
- *	zero is allowed to write dirty metadata to disk.  All other 
- *	processes must retain dirty metadata until they are informed at
- *	a sync point that the dirty metadata in question has been written
- *	to disk.
+ *    When metadata_write_strategy is set to this value, only process
+ *    zero is allowed to write dirty metadata to disk.  All other
+ *    processes must retain dirty metadata until they are informed at
+ *    a sync point that the dirty metadata in question has been written
+ *    to disk.
  *
- *	When the sync point is reached (or when there is a user generated
- *	flush), process zero flushes sufficient entries to bring it into
- *	complience with its min clean size (or flushes all dirty entries in
- *	the case of a user generated flush), broad casts the list of 
- *	entries just cleaned to all the other processes, and then exits
- *	the sync point.
+ *    When the sync point is reached (or when there is a user generated
+ *    flush), process zero flushes sufficient entries to bring it into
+ *    complience with its min clean size (or flushes all dirty entries in
+ *    the case of a user generated flush), broad casts the list of
+ *    entries just cleaned to all the other processes, and then exits
+ *    the sync point.
  *
- *	Upon receipt of the broadcast, the other processes mark the indicated
- *	entries as clean, and leave the sync point as well.
+ *    Upon receipt of the broadcast, the other processes mark the indicated
+ *    entries as clean, and leave the sync point as well.
  *
  *
- *	H5AC_METADATA_WRITE_STRATEGY__DISTRIBUTED:
+ *    H5AC_METADATA_WRITE_STRATEGY__DISTRIBUTED:
  *
- *	In the distributed metadata write strategy, process zero still makes
- *	the decisions as to what entries should be flushed, but the actual 
- *	flushes are distributed across the processes in the computation to 
- *	the extent possible.
+ *    In the distributed metadata write strategy, process zero still makes
+ *    the decisions as to what entries should be flushed, but the actual
+ *    flushes are distributed across the processes in the computation to
+ *    the extent possible.
  *
- *	In this strategy, when a sync point is triggered (either by dirty
- *	metadata creation or manual flush), all processes enter a barrier.
+ *    In this strategy, when a sync point is triggered (either by dirty
+ *    metadata creation or manual flush), all processes enter a barrier.
  *
- *	On the other side of the barrier, process 0 constructs an ordered
- *	list of the entries to be flushed, and then broadcasts this list
- *	to the caches in all the processes.
+ *    On the other side of the barrier, process 0 constructs an ordered
+ *    list of the entries to be flushed, and then broadcasts this list
+ *    to the caches in all the processes.
  *
- *	All processes then scan the list of entries to be flushed, flushing
- *	some, and marking the rest as clean.  The algorithm for this purpose
- *	ensures that each entry in the list is flushed exactly once, and 
- *	all are marked clean in each cache.
+ *    All processes then scan the list of entries to be flushed, flushing
+ *    some, and marking the rest as clean.  The algorithm for this purpose
+ *    ensures that each entry in the list is flushed exactly once, and
+ *    all are marked clean in each cache.
  *
- *	Note that in the case of a flush of the cache, no message passing
- *	is necessary, as all processes have the same list of dirty entries, 
- *	and all of these entries must be flushed.  Thus in this case it is 
- *	sufficient for each process to sort its list of dirty entries after 
- *	leaving the initial barrier, and use this list as if it had been 
- *	received from process zero.
+ *    Note that in the case of a flush of the cache, no message passing
+ *    is necessary, as all processes have the same list of dirty entries,
+ *    and all of these entries must be flushed.  Thus in this case it is
+ *    sufficient for each process to sort its list of dirty entries after
+ *    leaving the initial barrier, and use this list as if it had been
+ *    received from process zero.
+ *
+ *    To avoid possible messages from the past/future, all caches must
+ *    wait until all caches are done before leaving the sync point.
  *
- *	To avoid possible messages from the past/future, all caches must
- *	wait until all caches are done before leaving the sync point.
- *      
  ****************************************************************************/
 
-#define H5AC__CURR_CACHE_CONFIG_VERSION 	1
-#define H5AC__MAX_TRACE_FILE_NAME_LEN		1024
+#define H5AC__CURR_CACHE_CONFIG_VERSION     1
+#define H5AC__MAX_TRACE_FILE_NAME_LEN        1024
 
 #define H5AC_METADATA_WRITE_STRATEGY__PROCESS_0_ONLY    0
 #define H5AC_METADATA_WRITE_STRATEGY__DISTRIBUTED       1
@@ -451,9 +449,9 @@ typedef struct H5AC_cache_config_t
     /* general configuration fields: */
     int                      version;
 
-    hbool_t		     rpt_fcn_enabled;
+    hbool_t             rpt_fcn_enabled;
 
-    hbool_t		     open_trace_file;
+    hbool_t             open_trace_file;
     hbool_t                  close_trace_file;
     char                     trace_file_name[H5AC__MAX_TRACE_FILE_NAME_LEN + 1];
 
@@ -512,7 +510,7 @@ typedef struct H5AC_cache_config_t
  *
  * structure H5AC_cache_image_config_t
  *
- * H5AC_cache_image_ctl_t is a public structure intended for use in public 
+ * H5AC_cache_image_ctl_t is a public structure intended for use in public
  * APIs.  At least in its initial incarnation, it is a copy of struct
  * H5C_cache_image_ctl_t.
  *
@@ -526,47 +524,47 @@ typedef struct H5AC_cache_config_t
  * generate_image:  Boolean flag indicating whether a cache image should
  *      be created on file close.
  *
- * save_resize_status:	Boolean flag indicating whether the cache image 
- *	should include the adaptive cache resize configuration and status.
- *	Note that this field is ignored at present.
+ * save_resize_status:    Boolean flag indicating whether the cache image
+ *    should include the adaptive cache resize configuration and status.
+ *    Note that this field is ignored at present.
  *
- * entry_ageout:	Integer field indicating the maximum number of 
- *	times a prefetched entry can appear in subsequent cache images.
- *	This field exists to allow the user to avoid the buildup of 
- *	infrequently used entries in long sequences of cache images.
+ * entry_ageout:    Integer field indicating the maximum number of
+ *    times a prefetched entry can appear in subsequent cache images.
+ *    This field exists to allow the user to avoid the buildup of
+ *    infrequently used entries in long sequences of cache images.
  *
- *	The value of this field must lie in the range
- *	H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE (-1) to 
- *	H5AC__CACHE_IMAGE__ENTRY_AGEOUT__MAX (100).
+ *    The value of this field must lie in the range
+ *    H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE (-1) to
+ *    H5AC__CACHE_IMAGE__ENTRY_AGEOUT__MAX (100).
  *
- *	H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE means that no limit 
- *	is imposed on number of times a prefeteched entry can appear
- *	in subsequent cache images.
+ *    H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE means that no limit
+ *    is imposed on number of times a prefeteched entry can appear
+ *    in subsequent cache images.
  *
- *	A value of 0 prevents prefetched entries from being included 
- *	in cache images.
+ *    A value of 0 prevents prefetched entries from being included
+ *    in cache images.
  *
- *	Positive integers restrict prefetched entries to the specified
- *	number of appearances.
+ *    Positive integers restrict prefetched entries to the specified
+ *    number of appearances.
  *
- *	Note that the number of subsequent cache images that a prefetched
- *	entry has appeared in is tracked in an 8 bit field.  Thus, while
- *	H5AC__CACHE_IMAGE__ENTRY_AGEOUT__MAX can be increased from its 
- *	current value, any value in excess of 255 will be the functional 
- *	equivalent of H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE.
+ *    Note that the number of subsequent cache images that a prefetched
+ *    entry has appeared in is tracked in an 8 bit field.  Thus, while
+ *    H5AC__CACHE_IMAGE__ENTRY_AGEOUT__MAX can be increased from its
+ *    current value, any value in excess of 255 will be the functional
+ *    equivalent of H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE.
  *
  ****************************************************************************/
 
-#define H5AC__CURR_CACHE_IMAGE_CONFIG_VERSION 	1
+#define H5AC__CURR_CACHE_IMAGE_CONFIG_VERSION     1
 
-#define H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE	-1
-#define H5AC__CACHE_IMAGE__ENTRY_AGEOUT__MAX	100
+#define H5AC__CACHE_IMAGE__ENTRY_AGEOUT__NONE    -1
+#define H5AC__CACHE_IMAGE__ENTRY_AGEOUT__MAX    100
 
 typedef struct H5AC_cache_image_config_t {
-    int32_t                             version;
+    int                                 version;
     hbool_t                             generate_image;
     hbool_t                             save_resize_status;
-    int32_t                             entry_ageout;
+    int                                 entry_ageout;
 } H5AC_cache_image_config_t;
 
 #ifdef __cplusplus
diff --git a/src/H5Abtree2.c b/src/H5Abtree2.c
index a9c77d2..07da8e2 100644
--- a/src/H5Abtree2.c
+++ b/src/H5Abtree2.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -56,7 +54,6 @@
 typedef struct H5A_fh_ud_cmp_t {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     const char  *name;                  /* Name of attribute to compare      */
     const H5A_dense_bt2_name_rec_t *record;     /* v2 B-tree record for attribute */
     H5A_bt2_found_t found_op;           /* Callback when correct attribute is found */
@@ -160,7 +157,7 @@ const H5B2_class_t H5A_BT2_CORDER[1]={{ /* B-tree class information */
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5A__dense_fh_name_cmp(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5A__dense_fh_name_cmp(const void *obj, size_t obj_len, void *_udata)
 {
     H5A_fh_ud_cmp_t *udata = (H5A_fh_ud_cmp_t *)_udata;         /* User data for 'op' callback */
     H5A_t *attr = NULL;                 /* Pointer to attribute created from heap object */
@@ -170,7 +167,7 @@ H5A__dense_fh_name_cmp(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_ud
     FUNC_ENTER_STATIC
 
     /* Decode attribute information */
-    if(NULL == (attr = (H5A_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_ATTR_ID, (const unsigned char *)obj)))
+    if(NULL == (attr = (H5A_t *)H5O_msg_decode(udata->f, NULL, H5O_ATTR_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, FAIL, "can't decode attribute")
 
     /* Compare the string values */
@@ -272,7 +269,6 @@ H5A__dense_btree2_name_compare(const void *_bt2_udata, const void *_bt2_rec, int
         /* Prepare user data for callback */
         /* down */
         fh_udata.f = bt2_udata->f;
-        fh_udata.dxpl_id = bt2_udata->dxpl_id;
         fh_udata.name = bt2_udata->name;
         fh_udata.record = bt2_rec;
         fh_udata.found_op = bt2_udata->found_op;
@@ -289,7 +285,7 @@ H5A__dense_btree2_name_compare(const void *_bt2_udata, const void *_bt2_rec, int
         HDassert(fheap);
 
         /* Check if the user's attribute and the B-tree's attribute have the same name */
-        if(H5HF_op(fheap, bt2_udata->dxpl_id, &bt2_rec->id, H5A__dense_fh_name_cmp, &fh_udata) < 0)
+        if(H5HF_op(fheap, &bt2_rec->id, H5A__dense_fh_name_cmp, &fh_udata) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
 
         /* Callback will set comparison value */
diff --git a/src/H5Adense.c b/src/H5Adense.c
index 3dc3a42..3701022 100644
--- a/src/H5Adense.c
+++ b/src/H5Adense.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -74,7 +72,6 @@
 typedef struct H5A_bt2_od_wrt_t {
     /* downward */
     H5F_t  *f;                  /* Pointer to file that fractal heap is in */
-    hid_t dxpl_id;              /* DXPL for operation */
     H5HF_t *fheap;              /* Fractal heap handle to operate on */
     H5HF_t *shared_fheap;       /* Fractal heap handle for shared messages */
     H5A_t  *attr;               /* Attribute to write */
@@ -88,7 +85,6 @@ typedef struct H5A_bt2_od_wrt_t {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
     H5HF_t      *shared_fheap;          /* Fractal heap handle for shared messages */
     hsize_t     count;                  /* # of attributes examined          */
@@ -111,7 +107,6 @@ typedef struct {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     const H5A_dense_bt2_name_rec_t *record;     /* v2 B-tree record for attribute */
 
     /* upward */
@@ -135,7 +130,6 @@ typedef struct H5A_bt2_ud_rm_t {
 typedef struct H5A_bt2_ud_rmbi_t {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
     H5HF_t      *shared_fheap;          /* Fractal heap handle for shared messages */
     H5_index_t  idx_type;               /* Index type for operation */
@@ -170,7 +164,7 @@ typedef struct H5A_bt2_ud_rmbi_t {
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_create
+ * Function:	H5A__dense_create
  *
  * Purpose:	Creates dense attribute storage structures for an object
  *
@@ -183,7 +177,7 @@ typedef struct H5A_bt2_ud_rmbi_t {
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_create(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo)
+H5A__dense_create(H5F_t *f, H5O_ainfo_t *ainfo)
 {
     H5HF_create_t fheap_cparam;         /* Fractal heap creation parameters */
     H5B2_create_t bt2_cparam;           /* v2 B-tree creation parameters */
@@ -192,7 +186,7 @@ H5A_dense_create(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo)
     H5B2_t *bt2_corder = NULL;          /* v2 B-tree handle for creation order */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -212,7 +206,7 @@ H5A_dense_create(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo)
     fheap_cparam.max_man_size = H5O_FHEAP_MAX_MAN_SIZE;
 
     /* Create fractal heap for storing attributes */
-    if(NULL == (fheap = H5HF_create(f, dxpl_id, &fheap_cparam)))
+    if(NULL == (fheap = H5HF_create(f, &fheap_cparam)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create fractal heap")
 
     /* Retrieve the heap's address in the file */
@@ -246,7 +240,7 @@ HDfprintf(stderr, "%s: fheap_id_len = %Zu\n", FUNC, fheap_id_len);
             H5O_FHEAP_ID_LEN;           /* Fractal heap ID */
     bt2_cparam.split_percent = H5A_NAME_BT2_SPLIT_PERC;
     bt2_cparam.merge_percent = H5A_NAME_BT2_MERGE_PERC;
-    if(NULL == (bt2_name = H5B2_create(f, dxpl_id, &bt2_cparam, NULL)))
+    if(NULL == (bt2_name = H5B2_create(f, &bt2_cparam, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create v2 B-tree for name index")
 
     /* Retrieve the v2 B-tree's address in the file */
@@ -267,7 +261,7 @@ HDfprintf(stderr, "%s: ainfo->name_bt2_addr = %a\n", FUNC, ainfo->name_bt2_addr)
                 H5O_FHEAP_ID_LEN;       /* Fractal heap ID */
         bt2_cparam.split_percent = H5A_CORDER_BT2_SPLIT_PERC;
         bt2_cparam.merge_percent = H5A_CORDER_BT2_MERGE_PERC;
-        if(NULL == (bt2_corder = H5B2_create(f, dxpl_id, &bt2_cparam, NULL)))
+        if(NULL == (bt2_corder = H5B2_create(f, &bt2_cparam, NULL)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create v2 B-tree for creation order index")
 
         /* Retrieve the v2 B-tree's address in the file */
@@ -280,15 +274,15 @@ HDfprintf(stderr, "%s: ainfo->corder_bt2_addr = %a\n", FUNC, ainfo->corder_bt2_a
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for creation order index")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_create() */
+} /* end H5A__dense_create() */
 
 
 /*-------------------------------------------------------------------------
@@ -326,7 +320,7 @@ H5A__dense_fnd_cb(const H5A_t *attr, hbool_t *took_ownership, void *_user_attr)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_open
+ * Function:	H5A__dense_open
  *
  * Purpose:	Open an attribute in dense storage structures for an object
  *
@@ -339,7 +333,7 @@ H5A__dense_fnd_cb(const H5A_t *attr, hbool_t *took_ownership, void *_user_attr)
  *-------------------------------------------------------------------------
  */
 H5A_t *
-H5A_dense_open(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *name)
+H5A__dense_open(H5F_t *f, const H5O_ainfo_t *ainfo, const char *name)
 {
     H5A_bt2_ud_common_t udata;          /* User data for v2 B-tree modify */
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
@@ -349,7 +343,7 @@ H5A_dense_open(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *na
     htri_t attr_exists;                 /* Attribute exists in v2 B-tree */
     H5A_t *ret_value = NULL;            /* Return value */
 
-    FUNC_ENTER_NOAPI(NULL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -359,11 +353,11 @@ H5A_dense_open(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *na
     HDassert(name);
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to open fractal heap")
 
     /* Check if attributes are shared in this file */
-    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, NULL, "can't determine if attributes are shared")
 
     /* Get handle for shared message heap, if attributes are sharable */
@@ -371,24 +365,23 @@ H5A_dense_open(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *na
         haddr_t shared_fheap_addr;      /* Address of fractal heap to use */
 
         /* Retrieve the address of the shared message's fractal heap */
-        if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+        if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, NULL, "can't get shared message heap address")
 
         /* Check if there are any shared messages currently */
         if(H5F_addr_defined(shared_fheap_addr)) {
             /* Open the fractal heap for shared header messages */
-            if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+            if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to open fractal heap")
         } /* end if */
     } /* end if */
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to open v2 B-tree for name index")
 
     /* Create the "udata" information for v2 B-tree record find */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.fheap = fheap;
     udata.shared_fheap = shared_fheap;
     udata.name = name;
@@ -399,26 +392,26 @@ H5A_dense_open(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *na
     udata.found_op_data = &ret_value;
 
     /* Find & copy the attribute in the 'name' index */
-    if((attr_exists = H5B2_find(bt2_name, dxpl_id, &udata, NULL, NULL)) < 0)
+    if((attr_exists = H5B2_find(bt2_name, &udata, NULL, NULL)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "can't search for attribute in name index")
     else if(attr_exists == FALSE)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "can't locate attribute in name index")
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, NULL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, NULL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, NULL, "can't close v2 B-tree for name index")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_open() */
+} /* end H5A__dense_open() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_insert
+ * Function:	H5A__dense_insert
  *
  * Purpose:	Insert an attribute into dense storage structures for an object
  *
@@ -431,7 +424,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
+H5A__dense_insert(H5F_t *f, const H5O_ainfo_t *ainfo, H5A_t *attr)
 {
     H5A_bt2_ud_ins_t udata;             /* User data for v2 B-tree insertion */
     H5HF_t *fheap = NULL;               /* Fractal heap handle for attributes */
@@ -444,7 +437,7 @@ H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
     htri_t attr_sharable;               /* Flag indicating attributes are sharable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -454,7 +447,7 @@ H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
     HDassert(attr);
 
     /* Check if attributes are shared in this file */
-    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't determine if attributes are shared")
 
     /* Get handle for shared message heap, if attributes are sharable */
@@ -470,7 +463,7 @@ H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
             mesg_flags |= H5O_MSG_FLAG_SHARED;
         else {
             /* Should this attribute be written as a SOHM? */
-            if(H5SM_try_share(f, dxpl_id, NULL, 0, H5O_ATTR_ID, attr, &mesg_flags) < 0)
+            if(H5SM_try_share(f, NULL, 0, H5O_ATTR_ID, attr, &mesg_flags) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "error determining if message should be shared")
 
             /* Attributes can't be "unique be shareable" yet */
@@ -478,19 +471,19 @@ H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
         } /* end else */
 
         /* Retrieve the address of the shared message's fractal heap */
-        if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+        if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared message heap address")
 
         /* Check if there are any shared messages currently */
         if(H5F_addr_defined(shared_fheap_addr)) {
             /* Open the fractal heap for shared header messages */
-            if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+            if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
         } /* end if */
     } /* end if */
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Check for inserting shared attribute */
@@ -523,17 +516,16 @@ H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
 
         /* Insert the serialized attribute into the fractal heap */
         /* (sets the heap ID in the user data) */
-        if(H5HF_insert(fheap, dxpl_id, attr_size, attr_ptr, &udata.id) < 0)
+        if(H5HF_insert(fheap, attr_size, attr_ptr, &udata.id) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to insert attribute into fractal heap")
     } /* end else */
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Create the callback information for v2 B-tree record insertion */
     udata.common.f = f;
-    udata.common.dxpl_id = dxpl_id;
     udata.common.fheap = fheap;
     udata.common.shared_fheap = shared_fheap;
     udata.common.name = attr->shared->name;
@@ -545,36 +537,36 @@ H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
     /* udata.id already set */
 
     /* Insert attribute into 'name' tracking v2 B-tree */
-    if(H5B2_insert(bt2_name, dxpl_id, &udata) < 0)
+    if(H5B2_insert(bt2_name, &udata) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to insert record into v2 B-tree")
 
     /* Check if we should create a creation order index v2 B-tree record */
     if(ainfo->index_corder) {
         /* Open the creation order index v2 B-tree */
         HDassert(H5F_addr_defined(ainfo->corder_bt2_addr));
-        if(NULL == (bt2_corder = H5B2_open(f, dxpl_id, ainfo->corder_bt2_addr, NULL)))
+        if(NULL == (bt2_corder = H5B2_open(f, ainfo->corder_bt2_addr, NULL)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
         /* Insert the record into the creation order index v2 B-tree */
-        if(H5B2_insert(bt2_corder, dxpl_id, &udata) < 0)
+        if(H5B2_insert(bt2_corder, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to insert record into v2 B-tree")
     } /* end if */
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for creation order index")
     if(wb && H5WB_unwrap(wb) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close wrapped buffer")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_insert() */
+} /* end H5A__dense_insert() */
 
 
 /*-------------------------------------------------------------------------
@@ -649,7 +641,7 @@ H5A__dense_write_bt2_cb(void *_record, void *_op_data, hbool_t *changed)
     /* Check for modifying shared attribute */
     if(record->flags & H5O_MSG_FLAG_SHARED) {
         /* Update the shared attribute in the SOHM info */
-        if(H5O_attr_update_shared(op_data->f, op_data->dxpl_id, NULL, op_data->attr, NULL) < 0)
+        if(H5O__attr_update_shared(op_data->f, NULL, op_data->attr, NULL) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update attribute in shared storage")
 
         /* Update record's heap ID */
@@ -660,12 +652,11 @@ H5A__dense_write_bt2_cb(void *_record, void *_op_data, hbool_t *changed)
             H5A_bt2_ud_common_t udata;          /* User data for v2 B-tree modify */
 
             /* Open the creation order index v2 B-tree */
-            if(NULL == (bt2_corder = H5B2_open(op_data->f, op_data->dxpl_id, op_data->corder_bt2_addr, NULL)))
+            if(NULL == (bt2_corder = H5B2_open(op_data->f, op_data->corder_bt2_addr, NULL)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
             /* Create the "udata" information for v2 B-tree record modify */
             udata.f = op_data->f;
-            udata.dxpl_id = op_data->dxpl_id;
             udata.fheap = NULL;
             udata.shared_fheap = NULL;
             udata.name = NULL;
@@ -676,7 +667,7 @@ H5A__dense_write_bt2_cb(void *_record, void *_op_data, hbool_t *changed)
             udata.found_op_data = NULL;
 
             /* Modify record for creation order index */
-            if(H5B2_modify(bt2_corder, op_data->dxpl_id, &udata, H5A__dense_write_bt2_cb2, &op_data->attr->sh_loc.u.heap_id) < 0)
+            if(H5B2_modify(bt2_corder, &udata, H5A__dense_write_bt2_cb2, &op_data->attr->sh_loc.u.heap_id) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to modify record in v2 B-tree")
         } /* end if */
 
@@ -708,20 +699,20 @@ H5A__dense_write_bt2_cb(void *_record, void *_op_data, hbool_t *changed)
 {
     size_t obj_len;             /* Length of existing encoded attribute */
 
-    if(H5HF_get_obj_len(op_data->fheap, op_data->dxpl_id, &record->id, &obj_len) < 0)
+    if(H5HF_get_obj_len(op_data->fheap, &record->id, &obj_len) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGETSIZE, FAIL, "can't get object size")
     HDassert(obj_len == attr_size);
 }
 #endif /* NDEBUG */
         /* Update existing attribute in heap */
         /* (might be more efficient as fractal heap 'op' callback, but leave that for later -QAK) */
-        if(H5HF_write(op_data->fheap, op_data->dxpl_id, &record->id, changed, attr_ptr) < 0)
+        if(H5HF_write(op_data->fheap, &record->id, changed, attr_ptr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update attribute in heap")
     } /* end else */
 
 done:
     /* Release resources */
-    if(bt2_corder && H5B2_close(bt2_corder, op_data->dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for creation order index")
     if(wb && H5WB_unwrap(wb) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close wrapped buffer")
@@ -731,7 +722,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_write
+ * Function:	H5A__dense_write
  *
  * Purpose:	Modify an attribute in dense storage structures for an object
  *
@@ -744,7 +735,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_write(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
+H5A__dense_write(H5F_t *f, const H5O_ainfo_t *ainfo, H5A_t *attr)
 {
     H5A_bt2_ud_common_t udata;          /* User data for v2 B-tree modify */
     H5A_bt2_od_wrt_t op_data;           /* "Op data" for v2 B-tree modify */
@@ -754,7 +745,7 @@ H5A_dense_write(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
     htri_t attr_sharable;               /* Flag indicating attributes are sharable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -766,7 +757,7 @@ H5A_dense_write(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
     HDassert(attr);
 
     /* Check if attributes are shared in this file */
-    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't determine if attributes are shared")
 
     /* Get handle for shared message heap, if attributes are sharable */
@@ -774,28 +765,27 @@ H5A_dense_write(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
         haddr_t shared_fheap_addr;      /* Address of fractal heap to use */
 
         /* Retrieve the address of the shared message's fractal heap */
-        if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+        if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared message heap address")
 
         /* Check if there are any shared messages currently */
         if(H5F_addr_defined(shared_fheap_addr)) {
             /* Open the fractal heap for shared header messages */
-            if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+            if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
         } /* end if */
     } /* end if */
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Create the "udata" information for v2 B-tree record modify */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.fheap = fheap;
     udata.shared_fheap = shared_fheap;
     udata.name = attr->shared->name;
@@ -807,27 +797,26 @@ H5A_dense_write(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, H5A_t *attr)
 
     /* Create the "op_data" for the v2 B-tree record 'modify' callback */
     op_data.f = f;
-    op_data.dxpl_id = dxpl_id;
     op_data.fheap = fheap;
     op_data.shared_fheap = shared_fheap;
     op_data.attr = attr;
     op_data.corder_bt2_addr = ainfo->corder_bt2_addr;
 
     /* Modify attribute through 'name' tracking v2 B-tree */
-    if(H5B2_modify(bt2_name, dxpl_id, &udata, H5A__dense_write_bt2_cb, &op_data) < 0)
+    if(H5B2_modify(bt2_name, &udata, H5A__dense_write_bt2_cb, &op_data) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to modify record in v2 B-tree")
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_write() */
+} /* end H5A__dense_write() */
 
 
 /*-------------------------------------------------------------------------
@@ -845,7 +834,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5A__dense_copy_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5A__dense_copy_fh_cb(const void *obj, size_t obj_len, void *_udata)
 {
     H5A_fh_ud_cp_t *udata = (H5A_fh_ud_cp_t *)_udata;       /* User data for fractal heap 'op' callback */
     herr_t ret_value = SUCCEED;   /* Return value */
@@ -859,7 +848,7 @@ H5A__dense_copy_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_uda
      *  HDF5 routine, it could attempt to re-protect that direct block for the
      *  heap, causing the HDF5 routine called to fail)
      */
-    if(NULL == (udata->attr = (H5A_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_ATTR_ID, (const unsigned char *)obj)))
+    if(NULL == (udata->attr = (H5A_t *)H5O_msg_decode(udata->f, NULL, H5O_ATTR_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDECODE, FAIL, "can't decode attribute")
 
     /* Set the creation order index for the attribute */
@@ -875,7 +864,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_rename
+ * Function:	H5A__dense_rename
  *
  * Purpose:	Rename an attribute in dense storage structures for an object
  *
@@ -888,7 +877,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *old_name,
+H5A__dense_rename(H5F_t *f, const H5O_ainfo_t *ainfo, const char *old_name,
     const char *new_name)
 {
     H5A_bt2_ud_common_t udata;          /* User data for v2 B-tree modify */
@@ -901,7 +890,7 @@ H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     htri_t attr_exists;                 /* Attribute exists in v2 B-tree */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -912,7 +901,7 @@ H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     HDassert(new_name);
 
     /* Check if attributes are shared in this file */
-    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't determine if attributes are shared")
 
     /* Get handle for shared message heap, if attributes are sharable */
@@ -920,28 +909,27 @@ H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
         haddr_t shared_fheap_addr;      /* Address of fractal heap to use */
 
         /* Retrieve the address of the shared message's fractal heap */
-        if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+        if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared message heap address")
 
         /* Check if there are any shared messages currently */
         if(H5F_addr_defined(shared_fheap_addr)) {
             /* Open the fractal heap for shared header messages */
-            if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+            if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
         } /* end if */
     } /* end if */
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Create the "udata" information for v2 B-tree record modify */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.fheap = fheap;
     udata.shared_fheap = shared_fheap;
     udata.name = old_name;
@@ -952,7 +940,7 @@ H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     udata.found_op_data = &attr_copy;
 
     /* Get copy of attribute through 'name' tracking v2 B-tree */
-    if((attr_exists = H5B2_find(bt2_name, dxpl_id, &udata, NULL, NULL)) < 0)
+    if((attr_exists = H5B2_find(bt2_name, &udata, NULL, NULL)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "can't search for attribute in name index")
     else if(attr_exists == FALSE)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "can't locate attribute in name index")
@@ -972,12 +960,12 @@ H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     attr_copy->shared->name = H5MM_xstrdup(new_name);
 
     /* Recompute the version to encode the attribute with */
-    if(H5A_set_version(f, attr_copy) < 0)
+    if(H5A__set_version(f, attr_copy) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "unable to update attribute version")
 
     /* Insert renamed attribute back into dense storage */
     /* (Possibly making it shared) */
-    if(H5A_dense_insert(f, dxpl_id, ainfo, attr_copy) < 0)
+    if(H5A__dense_insert(f, ainfo, attr_copy) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to add to dense storage")
 
     /* Was this attribute shared? */
@@ -985,7 +973,7 @@ H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
         hsize_t attr_rc;                /* Attribute's ref count in shared message storage */
 
         /* Retrieve ref count for shared attribute */
-        if(H5SM_get_refcount(f, dxpl_id, H5O_ATTR_ID, &attr_copy->sh_loc, &attr_rc) < 0)
+        if(H5SM_get_refcount(f, H5O_ATTR_ID, &attr_copy->sh_loc, &attr_rc) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve shared message ref count")
 
         /* If the newly shared attribute needs to share "ownership" of the shared
@@ -997,36 +985,36 @@ H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
          */
         if(attr_rc == 1) {
             /* Increment reference count on attribute components */
-            if(H5O_attr_link(f, dxpl_id, NULL, attr_copy) < 0)
+            if(H5O__attr_link(f, NULL, attr_copy) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust attribute link count")
         } /* end if */
     } /* end if */
     else if(shared_mesg == 0) {
         /* Increment reference count on attribute components */
         /* (so that they aren't deleted when the attribute is removed shortly) */
-        if(H5O_attr_link(f, dxpl_id, NULL, attr_copy) < 0)
+        if(H5O__attr_link(f, NULL, attr_copy) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust attribute link count")
     } /* end if */
     else if(shared_mesg < 0)
 	HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "error determining if message should be shared")
 
     /* Delete old attribute from dense storage */
-    if(H5A_dense_remove(f, dxpl_id, ainfo, old_name) < 0)
+    if(H5A__dense_remove(f, ainfo, old_name) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute in dense storage")
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
     if(attr_copy)
         H5O_msg_free(H5O_ATTR_ID, attr_copy);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_rename() */
+} /* end H5A__dense_rename() */
 
 
 /*-------------------------------------------------------------------------
@@ -1067,12 +1055,11 @@ H5A__dense_iterate_bt2_cb(const void *_record, void *_bt2_udata)
         /* Prepare user data for callback */
         /* down */
         fh_udata.f = bt2_udata->f;
-        fh_udata.dxpl_id = bt2_udata->dxpl_id;
         fh_udata.record = record;
         fh_udata.attr = NULL;
 
         /* Call fractal heap 'op' routine, to copy the attribute information */
-        if(H5HF_op(fheap, bt2_udata->dxpl_id, &record->id, H5A__dense_copy_fh_cb, &fh_udata) < 0)
+        if(H5HF_op(fheap, &record->id, H5A__dense_copy_fh_cb, &fh_udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPERATE, H5_ITER_ERROR, "heap op callback failed")
 
         /* Check which type of callback to make */
@@ -1127,7 +1114,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_iterate
+ * Function:	H5A__dense_iterate
  *
  * Purpose:	Iterate over attributes in dense storage structures for an object
  *
@@ -1140,7 +1127,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_iterate(H5F_t *f, hid_t dxpl_id, hid_t loc_id, const H5O_ainfo_t *ainfo,
+H5A__dense_iterate(H5F_t *f, hid_t loc_id, const H5O_ainfo_t *ainfo,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_attr,
     const H5A_attr_iter_op_t *attr_op, void *op_data)
 {
@@ -1151,7 +1138,7 @@ H5A_dense_iterate(H5F_t *f, hid_t dxpl_id, hid_t loc_id, const H5O_ainfo_t *ainf
     haddr_t bt2_addr;                   /* Address of v2 B-tree to use for lookup */
     herr_t ret_value = FAIL;            /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1191,11 +1178,11 @@ H5A_dense_iterate(H5F_t *f, hid_t dxpl_id, hid_t loc_id, const H5O_ainfo_t *ainf
         htri_t attr_sharable;               /* Flag indicating attributes are sharable */
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
         /* Check if attributes are shared in this file */
-        if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+        if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't determine if attributes are shared")
 
         /* Get handle for shared message heap, if attributes are sharable */
@@ -1203,24 +1190,23 @@ H5A_dense_iterate(H5F_t *f, hid_t dxpl_id, hid_t loc_id, const H5O_ainfo_t *ainf
             haddr_t shared_fheap_addr;      /* Address of fractal heap to use */
 
             /* Retrieve the address of the shared message's fractal heap */
-            if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+            if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared message heap address")
 
             /* Check if there are any shared messages currently */
             if(H5F_addr_defined(shared_fheap_addr)) {
                 /* Open the fractal heap for shared header messages */
-                if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+                if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
             } /* end if */
         } /* end if */
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(f, bt2_addr, NULL)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for index")
 
         /* Construct the user data for v2 B-tree iterator callback */
         udata.f = f;
-        udata.dxpl_id = dxpl_id;
         udata.fheap = fheap;
         udata.shared_fheap = shared_fheap;
         udata.loc_id = loc_id;
@@ -1231,7 +1217,7 @@ H5A_dense_iterate(H5F_t *f, hid_t dxpl_id, hid_t loc_id, const H5O_ainfo_t *ainf
 
         /* Iterate over the records in the v2 B-tree's "native" order */
         /* (by hash of name) */
-        if((ret_value = H5B2_iterate(bt2, dxpl_id, H5A__dense_iterate_bt2_cb, &udata)) < 0)
+        if((ret_value = H5B2_iterate(bt2, H5A__dense_iterate_bt2_cb, &udata)) < 0)
             HERROR(H5E_ATTR, H5E_BADITER, "attribute iteration failed");
 
         /* Update the last attribute examined, if requested */
@@ -1241,27 +1227,27 @@ H5A_dense_iterate(H5F_t *f, hid_t dxpl_id, hid_t loc_id, const H5O_ainfo_t *ainf
     else {
         /* Build the table of attributes for this object */
         /* (build table using the name index, but sort according to idx_type) */
-        if(H5A_dense_build_table(f, dxpl_id, ainfo, idx_type, order, &atable) < 0)
+        if(H5A__dense_build_table(f, ainfo, idx_type, order, &atable) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "error building table of attributes")
 
         /* Iterate over attributes in table */
-        if((ret_value = H5A_attr_iterate_table(&atable, skip, last_attr, loc_id, attr_op, op_data)) < 0)
+        if((ret_value = H5A__attr_iterate_table(&atable, skip, last_attr, loc_id, attr_op, op_data)) < 0)
             HERROR(H5E_ATTR, H5E_CANTNEXT, "iteration operator failed");
     } /* end else */
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for index")
-    if(atable.attrs && H5A_attr_release_table(&atable) < 0)
+    if(atable.attrs && H5A__attr_release_table(&atable) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute table")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_iterate() */
+} /* end H5A__dense_iterate() */
 
 
 /*-------------------------------------------------------------------------
@@ -1291,37 +1277,37 @@ H5A__dense_remove_bt2_cb(const void *_record, void *_udata)
     /* Check for removing the link from the creation order index */
     if(H5F_addr_defined(udata->corder_bt2_addr)) {
         /* Open the creation order index v2 B-tree */
-        if(NULL == (bt2_corder = H5B2_open(udata->common.f, udata->common.dxpl_id, udata->corder_bt2_addr, NULL)))
+        if(NULL == (bt2_corder = H5B2_open(udata->common.f, udata->corder_bt2_addr, NULL)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
         /* Set up the user data for the v2 B-tree 'record remove' callback */
         udata->common.corder = attr->shared->crt_idx;
 
         /* Remove the record from the creation order index v2 B-tree */
-        if(H5B2_remove(bt2_corder, udata->common.dxpl_id, udata, NULL, NULL) < 0)
+        if(H5B2_remove(bt2_corder, udata, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTREMOVE, FAIL, "unable to remove attribute from creation order index v2 B-tree")
     } /* end if */
 
     /* Check for removing shared attribute */
     if(record->flags & H5O_MSG_FLAG_SHARED) {
         /* Decrement the reference count on the shared attribute message */
-        if(H5SM_delete(udata->common.f, udata->common.dxpl_id, NULL, &(attr->sh_loc)) < 0)
+        if(H5SM_delete(udata->common.f, NULL, &(attr->sh_loc)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to delete shared attribute")
     } /* end if */
     else {
         /* Perform the deletion action on the attribute */
         /* (takes care of shared & committed datatype/dataspace components) */
-        if(H5O_attr_delete(udata->common.f, udata->common.dxpl_id, NULL, attr) < 0)
+        if(H5O__attr_delete(udata->common.f, NULL, attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
 
         /* Remove record from fractal heap */
-        if(H5HF_remove(udata->common.fheap, udata->common.dxpl_id, &record->id) < 0)
+        if(H5HF_remove(udata->common.fheap, &record->id) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTREMOVE, FAIL, "unable to remove attribute from fractal heap")
     } /* end else */
 
 done:
     /* Release resources */
-    if(bt2_corder && H5B2_close(bt2_corder, udata->common.dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for creation order index")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1329,7 +1315,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_remove
+ * Function:	H5A__dense_remove
  *
  * Purpose:	Remove an attribute from the dense storage of an object
  *
@@ -1342,7 +1328,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *name)
+H5A__dense_remove(H5F_t *f, const H5O_ainfo_t *ainfo, const char *name)
 {
     H5A_bt2_ud_rm_t udata;              /* User data for v2 B-tree record removal */
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
@@ -1352,7 +1338,7 @@ H5A_dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     htri_t attr_sharable;               /* Flag indicating attributes are sharable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1362,11 +1348,11 @@ H5A_dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     HDassert(name && *name);
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Check if attributes are shared in this file */
-    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't determine if attributes are shared")
 
     /* Get handle for shared message heap, if attributes are sharable */
@@ -1374,24 +1360,23 @@ H5A_dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
         haddr_t shared_fheap_addr;      /* Address of fractal heap to use */
 
         /* Retrieve the address of the shared message's fractal heap */
-        if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+        if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared message heap address")
 
         /* Check if there are any shared messages currently */
         if(H5F_addr_defined(shared_fheap_addr)) {
             /* Open the fractal heap for shared header messages */
-            if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+            if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
         } /* end if */
     } /* end if */
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Set up the user data for the v2 B-tree 'record remove' callback */
     udata.common.f = f;
-    udata.common.dxpl_id = dxpl_id;
     udata.common.fheap = fheap;
     udata.common.shared_fheap = shared_fheap;
     udata.common.name = name;
@@ -1401,22 +1386,22 @@ H5A_dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     udata.corder_bt2_addr = ainfo->corder_bt2_addr;
 
     /* Remove the record from the name index v2 B-tree */
-    if(H5B2_remove(bt2_name, dxpl_id, &udata, H5A__dense_remove_bt2_cb, &udata) < 0)
+    if(H5B2_remove(bt2_name, &udata, H5A__dense_remove_bt2_cb, &udata) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTREMOVE, FAIL, "unable to remove attribute from name index v2 B-tree")
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
     if(attr_copy)
-        H5O_msg_free_real(H5O_MSG_ATTR, attr_copy);
+        H5O__msg_free_real(H5O_MSG_ATTR, attr_copy);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_remove() */
+} /* end H5A__dense_remove() */
 
 
 /*-------------------------------------------------------------------------
@@ -1448,7 +1433,6 @@ H5A__dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
 
     /* Set up the user data for fractal heap 'op' callback */
     fh_udata.f = bt2_udata->f;
-    fh_udata.dxpl_id = bt2_udata->dxpl_id;
     fh_udata.record = record;
     fh_udata.attr = NULL;
 
@@ -1461,7 +1445,7 @@ H5A__dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
     /* Check whether to make a copy of the attribute or just need the shared location info */
     if(H5F_addr_defined(bt2_udata->other_bt2_addr) || !(record->flags & H5O_MSG_FLAG_SHARED)) {
         /* Call fractal heap 'op' routine, to make copy of attribute to remove */
-        if(H5HF_op(fheap, bt2_udata->dxpl_id, &record->id, H5A__dense_copy_fh_cb, &fh_udata) < 0)
+        if(H5HF_op(fheap, &record->id, H5A__dense_copy_fh_cb, &fh_udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPERATE, FAIL, "attribute removal callback failed")
         HDassert(fh_udata.attr);
 
@@ -1490,7 +1474,6 @@ H5A__dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
 
             /* Set up the user data for the v2 B-tree 'record remove' callback */
             other_bt2_udata.f = bt2_udata->f;
-            other_bt2_udata.dxpl_id = bt2_udata->dxpl_id;
             other_bt2_udata.fheap = bt2_udata->fheap;
             other_bt2_udata.shared_fheap = bt2_udata->shared_fheap;
             other_bt2_udata.name = fh_udata.attr->shared->name;
@@ -1500,13 +1483,13 @@ H5A__dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
         } /* end else */
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(bt2_udata->f, bt2_udata->dxpl_id, bt2_udata->other_bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(bt2_udata->f, bt2_udata->other_bt2_addr, NULL)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for index")
 
         /* Set the common information for the v2 B-tree remove operation */
 
         /* Remove the record from the "other" index v2 B-tree */
-        if(H5B2_remove(bt2, bt2_udata->dxpl_id, &other_bt2_udata, NULL, NULL) < 0)
+        if(H5B2_remove(bt2, &other_bt2_udata, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTREMOVE, FAIL, "unable to remove record from 'other' index v2 B-tree")
     } /* end if */
 
@@ -1521,23 +1504,23 @@ H5A__dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
             sh_loc_ptr = &(fh_udata.attr->sh_loc);
 
         /* Decrement the reference count on the shared attribute message */
-        if(H5SM_delete(bt2_udata->f, bt2_udata->dxpl_id, NULL, sh_loc_ptr) < 0)
+        if(H5SM_delete(bt2_udata->f, NULL, sh_loc_ptr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to delete shared attribute")
     } /* end if */
     else {
         /* Perform the deletion action on the attribute */
         /* (takes care of shared & committed datatype/dataspace components) */
-        if(H5O_attr_delete(bt2_udata->f, bt2_udata->dxpl_id, NULL, fh_udata.attr) < 0)
+        if(H5O__attr_delete(bt2_udata->f, NULL, fh_udata.attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
 
         /* Remove record from fractal heap */
-        if(H5HF_remove(fheap, bt2_udata->dxpl_id, &record->id) < 0)
+        if(H5HF_remove(fheap, &record->id) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTREMOVE, FAIL, "unable to remove attribute from fractal heap")
     } /* end else */
 
 done:
     /* Release resources */
-    if(bt2 && H5B2_close(bt2, bt2_udata->dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for index")
     if(fh_udata.attr)
         H5O_msg_free(H5O_ATTR_ID, fh_udata.attr);
@@ -1547,7 +1530,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_remove_by_idx
+ * Function:	H5A__dense_remove_by_idx
  *
  * Purpose:	Remove an attribute from the dense storage of an object,
  *		according to the order within an index
@@ -1561,8 +1544,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t n)
+H5A__dense_remove_by_idx(H5F_t *f, const H5O_ainfo_t *ainfo, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n)
 {
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
     H5HF_t *shared_fheap = NULL;        /* Fractal heap handle for shared header messages */
@@ -1571,7 +1554,7 @@ H5A_dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
     haddr_t bt2_addr;                   /* Address of v2 B-tree to use for operation */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1608,11 +1591,11 @@ H5A_dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
         htri_t attr_sharable;           /* Flag indicating attributes are sharable */
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
         /* Check if attributes are shared in this file */
-        if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+        if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't determine if attributes are shared")
 
         /* Get handle for shared message heap, if attributes are sharable */
@@ -1620,37 +1603,36 @@ H5A_dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
             haddr_t shared_fheap_addr;      /* Address of fractal heap to use */
 
             /* Retrieve the address of the shared message's fractal heap */
-            if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+            if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared message heap address")
 
             /* Check if there are any shared messages currently */
             if(H5F_addr_defined(shared_fheap_addr)) {
                 /* Open the fractal heap for shared header messages */
-                if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+                if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
             } /* end if */
         } /* end if */
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(f, bt2_addr, NULL)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for index")
 
         /* Set up the user data for the v2 B-tree 'record remove' callback */
         udata.f = f;
-        udata.dxpl_id = dxpl_id;
         udata.fheap = fheap;
         udata.shared_fheap = shared_fheap;
         udata.idx_type = idx_type;
         udata.other_bt2_addr = idx_type == H5_INDEX_NAME ? ainfo->corder_bt2_addr : ainfo->name_bt2_addr;
 
         /* Remove the record from the name index v2 B-tree */
-        if(H5B2_remove_by_idx(bt2, dxpl_id, order, n, H5A__dense_remove_by_idx_bt2_cb, &udata) < 0)
+        if(H5B2_remove_by_idx(bt2, order, n, H5A__dense_remove_by_idx_bt2_cb, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTREMOVE, FAIL, "unable to remove attribute from v2 B-tree index")
     } /* end if */
     else {
         /* Build the table of attributes for this object */
         /* (build table using the name index, but sort according to idx_type) */
-        if(H5A_dense_build_table(f, dxpl_id, ainfo, idx_type, order, &atable) < 0)
+        if(H5A__dense_build_table(f, ainfo, idx_type, order, &atable) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "error building table of attributes")
 
         /* Check for skipping too many attributes */
@@ -1658,27 +1640,27 @@ H5A_dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
             HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified")
 
         /* Delete appropriate attribute from dense storage */
-        if(H5A_dense_remove(f, dxpl_id, ainfo, ((atable.attrs[n])->shared)->name) < 0)
+        if(H5A__dense_remove(f, ainfo, ((atable.attrs[n])->shared)->name) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute in dense storage")
     } /* end else */
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for index")
-    if(atable.attrs && H5A_attr_release_table(&atable) < 0)
+    if(atable.attrs && H5A__attr_release_table(&atable) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute table")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_remove_by_idx() */
+} /* end H5A__dense_remove_by_idx() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_exists
+ * Function:	H5A__dense_exists
  *
  * Purpose:	Check if an attribute exists in dense storage structures for
  *              an object
@@ -1692,7 +1674,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5A_dense_exists(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *name)
+H5A__dense_exists(H5F_t *f, const H5O_ainfo_t *ainfo, const char *name)
 {
     H5A_bt2_ud_common_t udata;          /* User data for v2 B-tree modify */
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
@@ -1701,7 +1683,7 @@ H5A_dense_exists(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     htri_t attr_sharable;               /* Flag indicating attributes are sharable */
     htri_t ret_value = TRUE;            /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1711,11 +1693,11 @@ H5A_dense_exists(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     HDassert(name);
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Check if attributes are shared in this file */
-    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID, dxpl_id)) < 0)
+    if((attr_sharable = H5SM_type_shared(f, H5O_ATTR_ID)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't determine if attributes are shared")
 
     /* Get handle for shared message heap, if attributes are sharable */
@@ -1723,24 +1705,23 @@ H5A_dense_exists(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
         haddr_t shared_fheap_addr;      /* Address of fractal heap to use */
 
         /* Retrieve the address of the shared message's fractal heap */
-        if(H5SM_get_fheap_addr(f, dxpl_id, H5O_ATTR_ID, &shared_fheap_addr) < 0)
+        if(H5SM_get_fheap_addr(f, H5O_ATTR_ID, &shared_fheap_addr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't get shared message heap address")
 
         /* Check if there are any shared messages currently */
         if(H5F_addr_defined(shared_fheap_addr)) {
             /* Open the fractal heap for shared header messages */
-            if(NULL == (shared_fheap = H5HF_open(f, dxpl_id, shared_fheap_addr)))
+            if(NULL == (shared_fheap = H5HF_open(f, shared_fheap_addr)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
         } /* end if */
     } /* end if */
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Create the "udata" information for v2 B-tree record 'find' */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.fheap = fheap;
     udata.shared_fheap = shared_fheap;
     udata.name = name;
@@ -1751,20 +1732,20 @@ H5A_dense_exists(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo, const char *
     udata.found_op_data = NULL;
 
     /* Find the attribute in the 'name' index */
-    if((ret_value = H5B2_find(bt2_name, dxpl_id, &udata, NULL, NULL)) < 0)
+    if((ret_value = H5B2_find(bt2_name, &udata, NULL, NULL)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "can't search for attribute in name index")
 
 done:
     /* Release resources */
-    if(shared_fheap && H5HF_close(shared_fheap, dxpl_id) < 0)
+    if(shared_fheap && H5HF_close(shared_fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_exists() */
+} /* end H5A__dense_exists() */
 
 
 /*-------------------------------------------------------------------------
@@ -1798,7 +1779,7 @@ H5A__dense_delete_bt2_cb(const void *_record, void *_bt2_udata)
         H5SM_reconstitute(&sh_mesg, bt2_udata->f, H5O_ATTR_ID, record->id);
 
         /* Decrement the reference count on the shared attribute message */
-        if(H5SM_delete(bt2_udata->f, bt2_udata->dxpl_id, NULL, &sh_mesg) < 0)
+        if(H5SM_delete(bt2_udata->f, NULL, &sh_mesg) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to delete shared attribute")
     } /* end if */
     else {
@@ -1807,33 +1788,32 @@ H5A__dense_delete_bt2_cb(const void *_record, void *_bt2_udata)
         /* Prepare user data for callback */
         /* down */
         fh_udata.f = bt2_udata->f;
-        fh_udata.dxpl_id = bt2_udata->dxpl_id;
         fh_udata.record = record;
         /* up */
         fh_udata.attr = NULL;
 
         /* Call fractal heap 'op' routine, to copy the attribute information */
-        if(H5HF_op(bt2_udata->fheap, bt2_udata->dxpl_id, &record->id, H5A__dense_copy_fh_cb, &fh_udata) < 0)
+        if(H5HF_op(bt2_udata->fheap, &record->id, H5A__dense_copy_fh_cb, &fh_udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTOPERATE, FAIL, "heap op callback failed")
         attr = fh_udata.attr;
 
         /* Perform the deletion action on the attribute */
         /* (takes care of shared/committed datatype & dataspace components) */
-        if(H5O_attr_delete(bt2_udata->f, bt2_udata->dxpl_id, NULL, fh_udata.attr) < 0)
+        if(H5O__attr_delete(bt2_udata->f, NULL, fh_udata.attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
     } /* end else */
 
 done:
     /* Release resources */
     if(attr)
-        H5O_msg_free_real(H5O_MSG_ATTR, attr);
+        H5O__msg_free_real(H5O_MSG_ATTR, attr);
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5A__dense_delete_bt2_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_delete
+ * Function:	H5A__dense_delete
  *
  * Purpose:	Delete all dense storage structures for attributes on an object
  *
@@ -1846,13 +1826,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_delete(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo)
+H5A__dense_delete(H5F_t *f, H5O_ainfo_t *ainfo)
 {
     H5A_bt2_ud_common_t udata;          /* v2 B-tree user data for deleting attributes */
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1861,12 +1841,11 @@ H5A_dense_delete(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo)
     HDassert(ainfo);
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, ainfo->fheap_addr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Create the "udata" information for v2 B-tree 'delete' */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.fheap = fheap;
     udata.shared_fheap = NULL;
     udata.name = NULL;
@@ -1876,33 +1855,33 @@ H5A_dense_delete(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo)
     udata.found_op_data = NULL;
 
     /* Delete name index v2 B-tree */
-    if(H5B2_delete(f, dxpl_id, ainfo->name_bt2_addr, NULL, H5A__dense_delete_bt2_cb, &udata) < 0)
+    if(H5B2_delete(f, ainfo->name_bt2_addr, NULL, H5A__dense_delete_bt2_cb, &udata) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete v2 B-tree for name index")
     ainfo->name_bt2_addr = HADDR_UNDEF;
 
     /* Release resources */
-    if(H5HF_close(fheap, dxpl_id) < 0)
+    if(H5HF_close(fheap) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
     fheap = NULL;
 
     /* Check if we should delete the creation order index v2 B-tree */
     if(H5F_addr_defined(ainfo->corder_bt2_addr)) {
         /* Delete the creation order index, without adjusting the ref. count on the attributes  */
-        if(H5B2_delete(f, dxpl_id, ainfo->corder_bt2_addr, NULL, NULL, NULL) < 0)
+        if(H5B2_delete(f, ainfo->corder_bt2_addr, NULL, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete v2 B-tree for creation order index")
         ainfo->corder_bt2_addr = HADDR_UNDEF;
     } /* end if */
 
     /* Delete fractal heap */
-    if(H5HF_delete(f, dxpl_id, ainfo->fheap_addr) < 0)
+    if(H5HF_delete(f, ainfo->fheap_addr) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete fractal heap")
     ainfo->fheap_addr = HADDR_UNDEF;
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_delete() */
+} /* end H5A__dense_delete() */
 
diff --git a/src/H5Adeprec.c b/src/H5Adeprec.c
index ba792ff..9b592b0 100644
--- a/src/H5Adeprec.c
+++ b/src/H5Adeprec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -40,6 +38,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5Apkg.h"		/* Attributes				*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"		/* Datasets				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -89,12 +88,12 @@
  PURPOSE
     Creates an attribute on an object
  USAGE
-    hid_t H5Acreate1(loc_id, name, type_id, space_id, plist_id)
+    hid_t H5Acreate1(loc_id, name, type_id, space_id, acpl_id)
         hid_t loc_id;       IN: Object (dataset or group) to be attached to
         const char *name;   IN: Name of attribute to create
         hid_t type_id;      IN: ID of datatype for attribute
         hid_t space_id;     IN: ID of dataspace for attribute
-        hid_t plist_id;     IN: ID of creation property list (currently not used)
+        hid_t acpl_id;      IN: ID of creation property list (currently not used)
  RETURNS
     Non-negative on success/Negative on failure
 
@@ -112,16 +111,16 @@
 --------------------------------------------------------------------------*/
 hid_t
 H5Acreate1(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
-	  hid_t plist_id)
+    hid_t acpl_id)
 {
-    H5A_t	        *attr = NULL;           /* Attribute created */
-    H5G_loc_t           loc;                    /* Object location */
-    H5T_t		*type;                  /* Datatype to use for attribute */
-    H5S_t		*space;                 /* Dataspace to use for attribute */
-    hid_t		ret_value;              /* Return value */
+    H5A_t	*attr = NULL;           /* Attribute created */
+    H5G_loc_t   loc;                    /* Object location */
+    H5T_t	*type;                  /* Datatype to use for attribute */
+    H5S_t	*space;                 /* Dataspace to use for attribute */
+    hid_t	ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    H5TRACE5("i", "i*siii", loc_id, name, type_id, space_id, plist_id);
+    H5TRACE5("i", "i*siii", loc_id, name, type_id, space_id, acpl_id);
 
     /* check arguments */
     if(H5I_ATTR == H5I_get_type(loc_id))
@@ -137,8 +136,12 @@ H5Acreate1(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
     if(NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, H5I_INVALID_HID, "can't set collective metadata read")
+
     /* Go do the real work for attaching the attribute to the dataset */
-    if(NULL==(attr = H5A_create(&loc, name, type, space, plist_id, H5AC_ind_read_dxpl_id)))
+    if(NULL == (attr = H5A__create(&loc, name, type, space, acpl_id)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to create attribute")
 
     /* Register the new attribute and get an ID for it */
@@ -146,6 +149,10 @@ H5Acreate1(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
         HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register attribute for ID")
 
 done:
+    /* Cleanup on failure */
+    if(ret_value < 0 && attr && H5A__close(attr) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
+
     FUNC_LEAVE_API(ret_value)
 } /* H5Acreate1() */
 
@@ -175,9 +182,9 @@ done:
 hid_t
 H5Aopen_name(hid_t loc_id, const char *name)
 {
-    H5G_loc_t    	loc;            /* Object location */
-    H5A_t               *attr = NULL;   /* Attribute opened */
-    hid_t		ret_value;
+    H5G_loc_t   loc;            /* Object location */
+    H5A_t       *attr = NULL;   /* Attribute opened */
+    hid_t	ret_value;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("i", "i*s", loc_id, name);
@@ -191,7 +198,7 @@ H5Aopen_name(hid_t loc_id, const char *name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
     /* Open the attribute on the object header */
-    if(NULL == (attr = H5A_open_by_name(&loc, ".", name, H5P_LINK_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)))
+    if(NULL == (attr = H5A__open_by_name(&loc, ".", name)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "can't open attribute: '%s'", name)
 
     /* Register the attribute and get an ID for it */
@@ -201,7 +208,7 @@ H5Aopen_name(hid_t loc_id, const char *name)
 done:
     /* Cleanup on failure */
     if(ret_value < 0)
-        if(attr && H5A_close(attr) < 0)
+        if(attr && H5A__close(attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -247,8 +254,8 @@ H5Aopen_idx(hid_t loc_id, unsigned idx)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
     /* Open the attribute in the object header */
-    if(NULL == (attr = H5A_open_by_idx(&loc, ".", H5_INDEX_CRT_ORDER, H5_ITER_INC, (hsize_t)idx, H5P_LINK_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)))
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open attribute")
+    if(NULL == (attr = H5A__open_by_idx(&loc, ".", H5_INDEX_CRT_ORDER, H5_ITER_INC, (hsize_t)idx)))
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open attribute")
 
     /* Register the attribute and get an ID for it */
     if((ret_value = H5I_register(H5I_ATTR, attr, TRUE)) < 0)
@@ -257,7 +264,7 @@ H5Aopen_idx(hid_t loc_id, unsigned idx)
 done:
     /* Cleanup on failure */
     if(ret_value < 0)
-        if(attr && H5A_close(attr) < 0)
+        if(attr && H5A__close(attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "can't close attribute")
 
     FUNC_LEAVE_API(ret_value)
@@ -285,9 +292,9 @@ done:
 int
 H5Aget_num_attrs(hid_t loc_id)
 {
-    H5O_loc_t    	*loc;	/* Object location for attribute */
-    void           	*obj;
-    int			ret_value;
+    H5O_loc_t   *loc;	/* Object location for attribute */
+    void        *obj;
+    int		ret_value;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("Is", "i", loc_id);
@@ -333,7 +340,7 @@ H5Aget_num_attrs(hid_t loc_id)
     } /*lint !e788 All appropriate cases are covered */
 
     /* Look up the # of attributes for the object */
-    if((ret_value = H5O_attr_count(loc, H5AC_ind_read_dxpl_id)) < 0)
+    if((ret_value = H5A__get_num_attrs(loc)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOUNT, FAIL, "can't get attribute count for object")
 
 done:
@@ -381,10 +388,7 @@ done:
 herr_t
 H5Aiterate1(hid_t loc_id, unsigned *attr_num, H5A_operator1_t op, void *op_data)
 {
-    H5A_attr_iter_op_t  attr_op;        /* Attribute operator */
-    hsize_t		start_idx;      /* Index of attribute to start iterating at */
-    hsize_t		last_attr;      /* Index of last attribute examined */
-    herr_t	        ret_value;      /* Return value */
+    herr_t	ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("e", "i*Iux*x", loc_id, attr_num, op, op_data);
@@ -393,19 +397,10 @@ H5Aiterate1(hid_t loc_id, unsigned *attr_num, H5A_operator1_t op, void *op_data)
     if(H5I_ATTR == H5I_get_type(loc_id))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "location is not valid for an attribute")
 
-    /* Build attribute operator info */
-    attr_op.op_type = H5A_ATTR_OP_APP;
-    attr_op.u.app_op = op;
-
     /* Call attribute iteration routine */
-    last_attr = start_idx = (hsize_t)(attr_num ? *attr_num : 0);
-    if((ret_value = H5O_attr_iterate(loc_id, H5AC_ind_read_dxpl_id, H5_INDEX_CRT_ORDER, H5_ITER_INC, start_idx, &last_attr, &attr_op, op_data)) < 0)
+    if((ret_value = H5A__iterate_old(loc_id, attr_num, op, op_data)) < 0)
         HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
 
-    /* Set the last attribute information */
-    if(attr_num)
-        *attr_num = (unsigned)last_attr;
-
 done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Aiterate1() */
diff --git a/src/H5Aint.c b/src/H5Aint.c
index e31cd83..e666e8c 100644
--- a/src/H5Aint.c
+++ b/src/H5Aint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -35,14 +33,15 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Apkg.h"		/* Attributes	  			*/
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Opkg.h"             /* Object headers			*/
-#include "H5SMprivate.h"	/* Shared Object Header Messages	*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Apkg.h"             /* Attributes                               */
+#include "H5CXprivate.h"        /* API Contexts                             */
+#include "H5Dprivate.h"         /* Datasets                                 */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5MMprivate.h"        /* Memory management                        */
+#include "H5Opkg.h"             /* Object headers                           */
+#include "H5SMprivate.h"        /* Shared Object Header Messages            */
 
 
 /****************/
@@ -57,7 +56,6 @@
 /* Data exchange structure to use when building table of compact attributes for an object */
 typedef struct {
     H5F_t       *f;             /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;        /* DXPL for operation                */
     H5A_attr_table_t *atable;   /* Pointer to attribute table to build */
     size_t curr_attr;           /* Current attribute to operate on */
     hbool_t bogus_crt_idx;      /* Whether bogus creation index values need to be set */
@@ -75,7 +73,6 @@ typedef struct {
     H5F_t *file;                /* file                 */
     hbool_t *recompute_size;    /* Flag to indicate if size changed */
     H5O_copy_t *cpy_info;       /* Information on copying options   */
-    hid_t dxpl_id;              /* DXPL for operation               */
     const H5O_loc_t *oloc_src;
     H5O_loc_t *oloc_dst;
 } H5A_dense_file_cp_ud_t;
@@ -90,6 +87,9 @@ typedef struct {
 /* Local Prototypes */
 /********************/
 
+static H5A_t *H5A__create_common(const H5G_loc_t *loc, const char *name,
+    const H5T_t *type, const H5S_t *space, hid_t acpl_id);
+static herr_t H5A__open_common(const H5G_loc_t *loc, H5A_t *attr);
 static herr_t H5A__compact_build_table_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
     unsigned sequence, unsigned *oh_flags_ptr, void *_udata/*in,out*/);
 static herr_t H5A__dense_build_table_cb(const H5A_t *attr, void *_udata);
@@ -99,11 +99,19 @@ static int H5A__attr_cmp_corder_inc(const void *attr1, const void *attr2);
 static int H5A__attr_cmp_corder_dec(const void *attr1, const void *attr2);
 static herr_t H5A__attr_sort_table(H5A_attr_table_t *atable, H5_index_t idx_type,
     H5_iter_order_t order);
+static herr_t H5A__iterate_common(hid_t loc_id, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t *idx, H5A_attr_iter_op_t *attr_op, void *op_data);
 
 /*********************/
 /* Package Variables */
 /*********************/
 
+/* Format version bounds for attribute */
+const unsigned H5O_attr_ver_bounds[] = {
+    H5O_ATTR_VERSION_1,         /* H5F_LIBVER_EARLIEST */
+    H5O_ATTR_VERSION_3,         /* H5F_LIBVER_V18 */
+    H5O_ATTR_VERSION_LATEST     /* H5F_LIBVER_LATEST */
+};
 
 /*****************************/
 /* Library Private Variables */
@@ -119,28 +127,20 @@ H5FL_SEQ_DEFINE(H5A_t_ptr);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_create
+ * Function:	H5A__create_common
  *
- * Purpose:
- *      This is the guts of creating an attribute.
- * Usage:
- *  hid_t H5A_create(ent, name, type, space)
- *      const H5G_entry_t *ent;   IN: Pointer to symbol table entry for object to attribute
- *      const char *name;   IN: Name of attribute
- *      H5T_t *type;        IN: Datatype of attribute
- *      H5S_t *space;       IN: Dataspace of attribute
- *      hid_t acpl_id       IN: Attribute creation property list
+ * Purpose:     This is the guts of creating an attribute.
  *
- * Return: attribute structure on success, NULL on Failure.
+ * Return:      Attribute structure on success, NULL on Failure.
  *
  * Programmer:	Quincey Koziol
  *		April 2, 1998
  *
  *-------------------------------------------------------------------------
  */
-H5A_t *
-H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
-    const H5S_t *space, hid_t acpl_id, hid_t dxpl_id)
+static H5A_t *
+H5A__create_common(const H5G_loc_t *loc, const char *name, const H5T_t *type,
+    const H5S_t *space, hid_t acpl_id)
 {
     H5A_t	*attr = NULL;           /* Attribute created */
     hssize_t	snelmts;	        /* elements in attribute */
@@ -148,9 +148,9 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
     htri_t      exists;                 /* Whether attribute exists */
     H5A_t	*ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->oloc->addr, NULL)
+    FUNC_ENTER_STATIC_TAG(loc->oloc->addr)
 
-    /* check args */
+    /* Check args */
     HDassert(loc);
     HDassert(name);
     HDassert(type);
@@ -161,7 +161,7 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
      *  name, but it's going to be hard to unwind all the special cases on
      *  failure, so just check first, for now - QAK)
      */
-    if((exists = H5O_attr_exists(loc->oloc, name, dxpl_id)) < 0)
+    if((exists = H5O__attr_exists(loc->oloc, name)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "error checking attributes")
     else if(exists > 0)
         HGOTO_ERROR(H5E_ATTR, H5E_ALREADYEXISTS, NULL, "attribute already exists")
@@ -211,18 +211,16 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
     if(H5T_set_loc(attr->shared->dt, loc->oloc->file, H5T_LOC_DISK) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "invalid datatype location")
 
-    /* Set the latest format for datatype, if requested */
-    if(H5F_USE_LATEST_FLAGS(loc->oloc->file, H5F_LATEST_DATATYPE))
-        if(H5T_set_latest_version(attr->shared->dt) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of datatype")
+    /* Set the version for datatype */
+    if(H5T_set_version(loc->oloc->file, attr->shared->dt) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set version of datatype")
 
     /* Copy the dataspace for the attribute */
     attr->shared->ds = H5S_copy(space, FALSE, TRUE);
 
-    /* Set the latest format for dataspace, if requested */
-    if(H5F_USE_LATEST_FLAGS(loc->oloc->file, H5F_LATEST_DATASPACE))
-        if(H5S_set_latest_version(attr->shared->ds) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of dataspace")
+    /* Set the version for dataspace */
+    if(H5S_set_version(loc->oloc->file, attr->shared->ds) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set version of dataspace")
 
     /* Copy the object header information */
     if(H5O_loc_copy(&(attr->oloc), loc->oloc, H5_COPY_DEEP) < 0)
@@ -235,20 +233,19 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
     /* Check if any of the pieces should be (or are already) shared in the
      * SOHM table
      */
-    if(H5SM_try_share(attr->oloc.file, dxpl_id, NULL, 0, H5O_DTYPE_ID, attr->shared->dt, NULL) < 0)
+    if(H5SM_try_share(attr->oloc.file, NULL, 0, H5O_DTYPE_ID, attr->shared->dt, NULL) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, NULL, "trying to share datatype failed")
-    if(H5SM_try_share(attr->oloc.file, dxpl_id, NULL, 0, H5O_SDSPACE_ID, attr->shared->ds, NULL) < 0)
+    if(H5SM_try_share(attr->oloc.file, NULL, 0, H5O_SDSPACE_ID, attr->shared->ds, NULL) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, NULL, "trying to share dataspace failed")
 
     /* Check whether datatype is committed & increment ref count
      * (to maintain ref. count incr/decr similarity with "shared message"
      *      type of datatype sharing)
      */
-    if(H5T_committed(attr->shared->dt)) {
+    if(H5T_committed(attr->shared->dt))
         /* Increment the reference count on the shared datatype */
-        if(H5T_link(attr->shared->dt, 1, dxpl_id) < 0)
+        if(H5T_link(attr->shared->dt, 1) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, NULL, "unable to adjust shared datatype link count")
-    } /* end if */
 
     /* Compute the size of pieces on disk.  This is either the size of the
      * datatype and dataspace messages themselves, or the size of the "shared"
@@ -272,19 +269,123 @@ H5A_create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
     attr->obj_opened = TRUE;
 
     /* Set the version to encode the attribute with */
-    if(H5A_set_version(attr->oloc.file, attr) < 0)
+    if(H5A__set_version(attr->oloc.file, attr) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, NULL, "unable to update attribute version")
 
     /* Insert the attribute into the object header */
-    if(H5O_attr_create(&(attr->oloc), dxpl_id, attr) < 0)
+    if(H5O__attr_create(&(attr->oloc), attr) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, NULL, "unable to create attribute in object header")
 
+    /* Set return value */
     ret_value = attr;
+
 done:
-    if(NULL == ret_value && attr && H5A_close(attr))
+    /* Cleanup on failure */
+    if(NULL == ret_value && attr && H5A__close(attr))
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* H5A_create() */
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* H5A__create_common() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__create
+ *
+ * Purpose:     Entry point for creating attribute on an object
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              creating attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:      Attribute structure on success, NULL on Failure.
+ *
+ * Programmer:	Quincey Koziol
+ *		December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+H5A_t *
+H5A__create(const H5G_loc_t *loc, const char *name, const H5T_t *type,
+    const H5S_t *space, hid_t acpl_id)
+{
+    H5A_t	*ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(name);
+    HDassert(type);
+    HDassert(space);
+
+    /* Go do the real work for attaching the attribute to the object */
+    if(NULL == (ret_value = H5A__create_common(loc, name, type, space, acpl_id)))
+	HGOTO_ERROR(H5E_ATTR, H5E_CANTCREATE, NULL, "unable to create attribute")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__create_by_name
+ *
+ * Purpose:	Create an attribute on object, according to it's name
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+H5A_t *
+H5A__create_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name,
+    const H5T_t *type, const H5S_t *space, hid_t acpl_id)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
+    H5A_t       *attr = NULL;           /* Attribute from object header */
+    H5A_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* check args */
+    HDassert(loc);
+    HDassert(obj_name);
+    HDassert(attr_name);
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "object not found")
+    loc_found = TRUE;
+
+    /* Go do the real work for attaching the attribute to the object */
+    if(NULL == (attr = H5A__create_common(&obj_loc, attr_name, type, space, acpl_id)))
+	HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to create attribute")
+
+    /* Set return value */
+    ret_value = attr;
+
+done:
+    /* Release resources */
+    if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, NULL, "can't free location")
+
+    /* Cleanup on failure */
+    if(ret_value == NULL)
+        if(attr && H5A__close(attr) < 0)
+            HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__create_by_name() */
 
 
 /*-------------------------------------------------------------------------
@@ -294,7 +395,7 @@ done:
  *      Finishes initializing an attributes the open
  *
  * Usage:
- *  herr_t H5A__open_common(loc, name, dxpl_id)
+ *  herr_t H5A__open_common(loc, name)
  *      const H5G_loc_t *loc;   IN: Pointer to group location for object
  *      H5A_t *attr;            IN/OUT: Pointer to attribute to initialize
  *
@@ -305,12 +406,12 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-herr_t
+static herr_t
 H5A__open_common(const H5G_loc_t *loc, H5A_t *attr)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(loc);
@@ -345,7 +446,56 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_open_by_idx
+ * Function:	H5A__open
+ *
+ * Purpose:	Open an attribute in an object header
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              creating attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		December 9, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+H5A_t *
+H5A__open(const H5G_loc_t *loc, const char *attr_name)
+{
+    H5A_t       *attr = NULL;           /* Attribute from object header */
+    H5A_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* check args */
+    HDassert(loc);
+    HDassert(attr_name);
+
+    /* Read in attribute from object header */
+    if(NULL == (attr = H5O__attr_open_by_name(loc->oloc, attr_name)))
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to load attribute info from object header for attribute: '%s'", attr_name)
+
+    /* Finish initializing attribute */
+    if(H5A__open_common(loc, attr) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to initialize attribute")
+
+    /* Set return value */
+    ret_value = attr;
+
+done:
+    /* Cleanup on failure */
+    if(ret_value == NULL)
+        if(attr && H5A__close(attr) < 0)
+            HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__open_by_idx
  *
  * Purpose: 	Open an attribute according to its index order
  *
@@ -357,8 +507,8 @@ done:
  *-------------------------------------------------------------------------
  */
 H5A_t *
-H5A_open_by_idx(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, hid_t lapl_id, hid_t dxpl_id)
+H5A__open_by_idx(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n)
 {
     H5G_loc_t   obj_loc;                /* Location used to open group */
     H5G_name_t  obj_path;            	/* Opened object group hier. path */
@@ -367,7 +517,7 @@ H5A_open_by_idx(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
     H5A_t       *attr = NULL;           /* Attribute from object header */
     H5A_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     /* check args */
     HDassert(loc);
@@ -379,12 +529,12 @@ H5A_open_by_idx(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
     H5G_loc_reset(&obj_loc);
 
     /* Find the object's location */
-    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
+    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "object not found")
     loc_found = TRUE;
 
     /* Read in attribute from object header */
-    if(NULL == (attr = H5O_attr_open_by_idx(obj_loc.oloc, idx_type, order, n, dxpl_id)))
+    if(NULL == (attr = H5O__attr_open_by_idx(obj_loc.oloc, idx_type, order, n)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "unable to load attribute info from object header")
 
     /* Finish initializing attribute */
@@ -401,15 +551,15 @@ done:
 
     /* Cleanup on failure */
     if(ret_value == NULL)
-        if(attr && H5A_close(attr) < 0)
+        if(attr && H5A__close(attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5A_open_by_idx() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__open_by_idx() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_open_by_name
+ * Function:	H5A__open_by_name
  *
  * Purpose:	Open an attribute in an object header, according to it's name
  *
@@ -421,8 +571,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5A_t *
-H5A_open_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name,
-    hid_t lapl_id, hid_t dxpl_id)
+H5A__open_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name)
 {
     H5G_loc_t   obj_loc;                /* Location used to open group */
     H5G_name_t  obj_path;            	/* Opened object group hier. path */
@@ -431,7 +580,7 @@ H5A_open_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_na
     H5A_t       *attr = NULL;           /* Attribute from object header */
     H5A_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI(NULL)
+    FUNC_ENTER_PACKAGE_VOL
 
     /* check args */
     HDassert(loc);
@@ -444,12 +593,12 @@ H5A_open_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_na
     H5G_loc_reset(&obj_loc);
 
     /* Find the object's location */
-    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
+    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, NULL, "object not found")
     loc_found = TRUE;
 
     /* Read in attribute from object header */
-    if(NULL == (attr = H5O_attr_open_by_name(obj_loc.oloc, attr_name, dxpl_id)))
+    if(NULL == (attr = H5O__attr_open_by_name(obj_loc.oloc, attr_name)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to load attribute info from object header")
 
     /* Finish initializing attribute */
@@ -466,11 +615,11 @@ done:
 
     /* Cleanup on failure */
     if(ret_value == NULL)
-        if(attr && H5A_close(attr) < 0)
+        if(attr && H5A__close(attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5A_open_by_name() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__open_by_name() */
 
 
 /*--------------------------------------------------------------------------
@@ -490,7 +639,7 @@ done:
     This function reads a complete attribute from disk.
 --------------------------------------------------------------------------*/
 herr_t
-H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id)
+H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf)
 {
     uint8_t		*tconv_buf = NULL;	/* datatype conv buffer*/
     uint8_t		*bkg_buf = NULL;	/* background buffer */
@@ -503,7 +652,7 @@ H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id)
     size_t		buf_size;		/* desired buffer size	*/
     herr_t		ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL_TAG(attr->oloc.addr)
 
     HDassert(attr);
     HDassert(mem_type);
@@ -525,7 +674,7 @@ H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id)
         else {  /* Attribute exists and has a value */
             /* Convert memory buffer into disk buffer */
             /* Set up type conversion function */
-            if(NULL == (tpath = H5T_path_find(attr->shared->dt, mem_type, NULL, NULL, dxpl_id, FALSE)))
+            if(NULL == (tpath = H5T_path_find(attr->shared->dt, mem_type)))
                 HGOTO_ERROR(H5E_ATTR, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dst datatypes")
 
             /* Check for type conversion required */
@@ -545,7 +694,7 @@ H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id)
                 HDmemcpy(tconv_buf, attr->shared->data, (src_type_size * nelmts));
 
                 /* Perform datatype conversion.  */
-                if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf, dxpl_id) < 0)
+                if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "datatype conversion failed")
 
                 /* Copy the converted data into the user's buffer */
@@ -572,7 +721,7 @@ done:
     if(bkg_buf)
 	bkg_buf = H5FL_BLK_FREE(attr_buf, bkg_buf);
 
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
 } /* H5A__read() */
 
 
@@ -593,7 +742,7 @@ done:
     This function writes a complete attribute to disk.
 --------------------------------------------------------------------------*/
 herr_t
-H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id)
+H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf)
 {
     uint8_t		*tconv_buf = NULL;	/* datatype conv buffer */
     hbool_t             tconv_owned = FALSE;    /* Whether the datatype conv buffer is owned by attribute */
@@ -607,7 +756,7 @@ H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id)
     size_t		buf_size;		/* desired buffer size	*/
     herr_t		ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, attr->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_VOL_TAG(attr->oloc.addr)
 
     HDassert(attr);
     HDassert(mem_type);
@@ -626,7 +775,7 @@ H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id)
 
         /* Convert memory buffer into disk buffer */
         /* Set up type conversion function */
-        if(NULL == (tpath = H5T_path_find(mem_type, attr->shared->dt, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath = H5T_path_find(mem_type, attr->shared->dt)))
             HGOTO_ERROR(H5E_ATTR, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dst datatypes")
 
         /* Check for type conversion required */
@@ -646,7 +795,7 @@ H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id)
             HDmemcpy(tconv_buf, buf, (src_type_size * nelmts));
 
             /* Perform datatype conversion */
-            if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf, dxpl_id) < 0)
+            if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "datatype conversion failed")
 
             /* Free the previous attribute data buffer, if there is one */
@@ -671,7 +820,7 @@ H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id)
         } /* end else */
 
         /* Modify the attribute in the object header */
-        if(H5O_attr_write(&(attr->oloc), dxpl_id, attr) < 0)
+        if(H5O__attr_write(&(attr->oloc), attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "unable to modify attribute")
     } /* end if */
 
@@ -686,7 +835,7 @@ done:
     if(bkg_buf)
         bkg_buf = H5FL_BLK_FREE(attr_buf, bkg_buf);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
 } /* H5A__write() */
 
 
@@ -712,7 +861,7 @@ H5A__get_name(H5A_t *attr, size_t buf_size, char *buf)
     size_t              copy_len, nbytes;
     ssize_t		ret_value = -1;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_PACKAGE_NOERR
 
     /* get the real attribute length */
     nbytes = HDstrlen(attr->shared->name);
@@ -737,94 +886,97 @@ H5A__get_name(H5A_t *attr, size_t buf_size, char *buf)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_get_space
+ * Function:    H5A_get_space
  *
- * Purpose:	Returns dataspace of the attribute.
+ * Purpose:     Returns dataspace of the attribute.
  *
- * Return:	Success:	dataspace
+ * Return:      Success:    A valid ID for the dataspace of an attribute
  *
- *		Failure:	NULL
- *
- * Programmer:	Mohamad Chaarawi
- *		March, 2012
+ *              Failure:    H5I_INVALID_ID
  *
  *-------------------------------------------------------------------------
  */
-H5S_t *
+hid_t
 H5A_get_space(H5A_t *attr)
 {
-    H5S_t *ret_value = NULL;
+    H5S_t      *ds = NULL;
+    hid_t       ret_value = H5I_INVALID_HID;
 
     FUNC_ENTER_NOAPI_NOINIT
 
     HDassert(attr);
 
     /* Copy the attribute's dataspace */
-    if(NULL == (ret_value = H5S_copy(attr->shared->ds, FALSE, TRUE)))
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to copy dataspace")
+    if (NULL == (ds = H5S_copy(attr->shared->ds, FALSE, TRUE)))
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, H5I_INVALID_HID, "unable to copy dataspace")
+
+    /* Atomize */
+    if ((ret_value = H5I_register(H5I_DATASPACE, ds, TRUE)) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register dataspace atom")
 
 done:
+    if (H5I_INVALID_HID == ret_value && ds && H5S_close(ds) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, H5I_INVALID_HID, "unable to release dataspace")
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5A_get_space() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_get_type
- *
- * Purpose:	Returns datatype of the dataset.
+ * Function:    H5A__get_type
  *
- * Return:	Success:	datatype
+ * Purpose:     Returns an ID for the datatype of an attribute
  *
- *		Failure:	NULL
+ * Return:      Success:    A valid ID for the datatype of an attribute
  *
- * Programmer:	Mohamad Chaarawi
- *		March, 2012
+ *              Failure:	H5I_INVALID_HID
  *
  *-------------------------------------------------------------------------
  */
-H5T_t *
-H5A_get_type(H5A_t *attr)
+hid_t
+H5A__get_type(H5A_t *attr)
 {
     H5T_t *dt = NULL;
-    H5T_t *ret_value = NULL;
+    hid_t ret_value = H5I_INVALID_HID;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     HDassert(attr);
 
     /* Patch the datatype's "top level" file pointer */
-    if(H5T_patch_file(attr->shared->dt, attr->oloc.file) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to patch datatype's file pointer")
+    if (H5T_patch_file(attr->shared->dt, attr->oloc.file) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, H5I_INVALID_HID, "unable to patch datatype's file pointer")
 
-    /*
-     * Copy the attribute's datatype.  If the type is a named type then
+    /* Copy the attribute's datatype.  If the type is a named type then
      * reopen the type before returning it to the user. Make the type
      * read-only.
      */
-    if(NULL == (dt = H5T_copy(attr->shared->dt, H5T_COPY_REOPEN)))
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "unable to copy datatype")
+    if (NULL == (dt = H5T_copy(attr->shared->dt, H5T_COPY_REOPEN)))
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, H5I_INVALID_HID, "unable to copy datatype")
 
     /* Mark any datatypes as being in memory now */
-    if(H5T_set_loc(dt, NULL, H5T_LOC_MEMORY) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "invalid datatype location")
+    if (H5T_set_loc(dt, NULL, H5T_LOC_MEMORY) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5I_INVALID_HID, "invalid datatype location")
 
     /* Lock copied type */
-    if(H5T_lock(dt, FALSE) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to lock transient datatype")
+    if (H5T_lock(dt, FALSE) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5I_INVALID_HID, "unable to lock transient datatype")
 
-    ret_value = dt;
+    /* Atomize */
+    if ((ret_value = H5I_register(H5I_DATATYPE, dt, TRUE)) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register datatype")
 
 done:
-    if(!ret_value && dt && (H5T_close(dt) < 0))
-        HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, NULL, "unable to release datatype")
+    if(H5I_INVALID_HID == ret_value && dt && (H5T_close(dt) < 0))
+        HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, H5I_INVALID_HID, "unable to release datatype")
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_get_type() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5A__get_type() */
 
 
 /*--------------------------------------------------------------------------
  NAME
-    H5A_get_create_plist
+    H5A__get_create_plist
  PURPOSE
     private version of H5Aget_create_plist
  RETURNS
@@ -839,14 +991,14 @@ done:
     resource leaks will occur.
 --------------------------------------------------------------------------*/
 hid_t
-H5A_get_create_plist(H5A_t* attr)
+H5A__get_create_plist(H5A_t* attr)
 {
     H5P_genplist_t      *plist;              /* Default property list */
     hid_t               new_plist_id;        /* ID of ACPL to return */
     H5P_genplist_t      *new_plist;          /* ACPL to return */
     hid_t               ret_value = H5I_INVALID_HID;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     if(NULL == (plist = (H5P_genplist_t *)H5I_object(H5P_LST_ATTRIBUTE_CREATE_ID_g)))
         HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "can't get default ACPL")
@@ -865,7 +1017,7 @@ H5A_get_create_plist(H5A_t* attr)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5Aget_create_plist() */
+} /* end H5A__get_create_plist() */
 
 
 /*-------------------------------------------------------------------------
@@ -910,7 +1062,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_copy
+ * Function:	H5A__copy
  *
  * Purpose:	Copies attribute OLD_ATTR.
  *
@@ -928,13 +1080,13 @@ done:
  *-------------------------------------------------------------------------
  */
 H5A_t *
-H5A_copy(H5A_t *_new_attr, const H5A_t *old_attr)
+H5A__copy(H5A_t *_new_attr, const H5A_t *old_attr)
 {
     H5A_t	*new_attr = NULL;
     hbool_t     allocated_attr = FALSE;   /* Whether the attribute was allocated */
     H5A_t	*ret_value = NULL;        /* Return value */
 
-    FUNC_ENTER_NOAPI(NULL)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(old_attr);
@@ -969,15 +1121,15 @@ H5A_copy(H5A_t *_new_attr, const H5A_t *old_attr)
 
 done:
     if(ret_value == NULL)
-        if(allocated_attr && new_attr && H5A_close(new_attr) < 0)
+        if(allocated_attr && new_attr && H5A__close(new_attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_copy() */
+} /* end H5A__copy() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_free
+ * Function:	H5A__free
  *
  * Purpose:	Frees all memory associated with an attribute, but does not
  *              free the H5A_t structure (which should be done in H5T_close).
@@ -992,11 +1144,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_free(H5A_t *attr)
+H5A__free(H5A_t *attr)
 {
     herr_t ret_value = SUCCEED;           /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     HDassert(attr);
 
@@ -1006,7 +1158,7 @@ H5A_free(H5A_t *attr)
         attr->shared->name = NULL;
     }
     if(attr->shared->dt) {
-        if(H5T_close(attr->shared->dt) < 0)
+        if(H5T_close_real(attr->shared->dt) < 0)
 	    HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release datatype info")
         attr->shared->dt = NULL;
     }
@@ -1020,11 +1172,43 @@ H5A_free(H5A_t *attr)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_free() */
+} /* end H5A__free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_close
+ * Function:	H5A__close_cb
+ *
+ * Purpose:	Frees an attribute and all associated memory.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		Sunday, February 18, 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__close_cb(H5A_t *attr)
+{
+    herr_t ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(attr);
+    HDassert(attr->shared);
+
+    /* Call the actual close routine */
+    if(H5A__close(attr) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, FAIL, "problem closing attribute")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5A__close_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__close
  *
  * Purpose:	Frees an attribute and all associated memory.
  *
@@ -1033,18 +1217,14 @@ done:
  * Programmer:	Robb Matzke
  *		Monday, December  8, 1997
  *
- * Modifications:
- *              Raymond Lu
- *              4 June 2008
- *              Changed some attribute object information to be shared.
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_close(H5A_t *attr)
+H5A__close(H5A_t *attr)
 {
     herr_t ret_value = SUCCEED;           /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     HDassert(attr);
     HDassert(attr->shared);
@@ -1053,10 +1233,10 @@ H5A_close(H5A_t *attr)
     if(attr->obj_opened && (H5O_close(&(attr->oloc), NULL) < 0))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release object header info")
 
-    /* Reference count can be 0.  It only happens when H5A_create fails. */
+    /* Reference count can be 0.  It only happens when H5A__create fails. */
     if(attr->shared->nrefs <= 1) {
         /* Free dynamicly allocated items */
-        if(H5A_free(attr) < 0)
+        if(H5A__free(attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't release attribute info")
 
         /* Destroy shared attribute struct */
@@ -1077,7 +1257,7 @@ H5A_close(H5A_t *attr)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_close() */
+} /* end H5A__close() */
 
 
 /*-------------------------------------------------------------------------
@@ -1175,7 +1355,40 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_exists_by_name
+ * Function:	H5A__exists
+ *
+ * Purpose:     Private version of H5Aexists
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              detecting attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:	Success:	TRUE/FALSE
+ *		Failure:        Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+htri_t
+H5A__exists(const H5G_loc_t *loc, const char *name)
+{
+    htri_t ret_value = FAIL;    /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check if the attribute exists */
+    if((ret_value = H5O__attr_exists(loc->oloc, name)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__exists() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__exists_by_name
  *
  * Purpose:	Private version of H5Aexists_by_name
  *
@@ -1188,8 +1401,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5A_exists_by_name(H5G_loc_t loc, const char *obj_name, const char *attr_name,
-                   hid_t lapl_id, hid_t dxpl_id)
+H5A__exists_by_name(H5G_loc_t loc, const char *obj_name, const char *attr_name)
 {
     H5G_loc_t   obj_loc;                /* Location used to open group */
     H5G_name_t  obj_path;            	/* Opened object group hier. path */
@@ -1197,7 +1409,7 @@ H5A_exists_by_name(H5G_loc_t loc, const char *obj_name, const char *attr_name,
     hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
     htri_t	ret_value = FAIL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Set up opened group location to fill in */
     obj_loc.oloc = &obj_oloc;
@@ -1205,12 +1417,12 @@ H5A_exists_by_name(H5G_loc_t loc, const char *obj_name, const char *attr_name,
     H5G_loc_reset(&obj_loc);
 
     /* Find the object's location */
-    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
+    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
     loc_found = TRUE;
 
     /* Check if the attribute exists */
-    if((ret_value = H5O_attr_exists(obj_loc.oloc, attr_name, dxpl_id)) < 0)
+    if((ret_value = H5O__attr_exists(obj_loc.oloc, attr_name)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "unable to determine if attribute exists")
 
 done:
@@ -1218,8 +1430,8 @@ done:
     if(loc_found && H5G_loc_free(&obj_loc) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5A_exists_by_name() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__exists_by_name() */
 
 
 /*-------------------------------------------------------------------------
@@ -1268,7 +1480,7 @@ H5A__compact_build_table_cb(H5O_t H5_ATTR_UNUSED *oh, H5O_mesg_t *mesg/*in,out*/
     } /* end if */
 
     /* Copy attribute into table */
-    if(NULL == (udata->atable->attrs[udata->curr_attr] = H5A_copy(NULL, (const H5A_t *)mesg->native)))
+    if(NULL == (udata->atable->attrs[udata->curr_attr] = H5A__copy(NULL, (const H5A_t *)mesg->native)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")
 
     /* Assign [somewhat arbitrary] creation order value, if requested */
@@ -1284,7 +1496,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_compact_build_table
+ * Function:	H5A__compact_build_table
  *
  * Purpose:     Builds a table containing a sorted list of attributes for
  *              an object
@@ -1301,14 +1513,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_compact_build_table(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_index_t idx_type,
+H5A__compact_build_table(H5F_t *f, H5O_t *oh, H5_index_t idx_type,
     H5_iter_order_t order, H5A_attr_table_t *atable)
 {
     H5A_compact_bt_ud_t udata;                  /* User data for iteration callback */
     H5O_mesg_operator_t op;             /* Wrapper for operator */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(f);
@@ -1321,7 +1533,6 @@ H5A_compact_build_table(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_index_t idx_type,
 
     /* Set up user data for iteration */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.atable = atable;
     udata.curr_attr = 0;
     udata.bogus_crt_idx = (hbool_t)((oh->version == H5O_VERSION_1 ||
@@ -1330,7 +1541,7 @@ H5A_compact_build_table(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_index_t idx_type,
     /* Iterate over existing attributes, checking for attribute with same name */
     op.op_type = H5O_MESG_OP_LIB;
     op.u.lib_op = H5A__compact_build_table_cb;
-    if(H5O_msg_iterate_real(f, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+    if(H5O__msg_iterate_real(f, oh, H5O_MSG_ATTR, &op, &udata) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error building attribute table")
 
     /* Correct # of attributes in table */
@@ -1345,7 +1556,7 @@ H5A_compact_build_table(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_index_t idx_type,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_compact_build_table() */
+} /* end H5A__compact_build_table() */
 
 
 /*-------------------------------------------------------------------------
@@ -1381,7 +1592,7 @@ H5A__dense_build_table_cb(const H5A_t *attr, void *_udata)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTALLOC, H5_ITER_ERROR, "can't allocate attribute")
 
     /* Copy attribute information.  Share the attribute object in copying. */
-    if(NULL == H5A_copy(udata->atable->attrs[udata->curr_attr], attr))
+    if(NULL == H5A__copy(udata->atable->attrs[udata->curr_attr], attr))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")
 
     /* Increment number of attributes stored */
@@ -1393,7 +1604,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_dense_build_table
+ * Function:	H5A__dense_build_table
  *
  * Purpose:     Builds a table containing a sorted list of attributes for
  *              an object
@@ -1411,14 +1622,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
+H5A__dense_build_table(H5F_t *f, const H5O_ainfo_t *ainfo,
     H5_index_t idx_type, H5_iter_order_t order, H5A_attr_table_t *atable)
 {
     H5B2_t *bt2_name = NULL;            /* v2 B-tree handle for name index */
     hsize_t nrec;                       /* # of records in v2 B-tree */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(f);
@@ -1428,7 +1639,7 @@ H5A_dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
     HDassert(atable);
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Retrieve # of records in "name" B-tree */
@@ -1458,8 +1669,8 @@ H5A_dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
         attr_op.u.lib_op = H5A__dense_build_table_cb;
 
         /* Iterate over the links in the group, building a table of the link messages */
-        if(H5A_dense_iterate(f, dxpl_id, (hid_t)0, ainfo, H5_INDEX_NAME,
-                H5_ITER_NATIVE, (hsize_t)0, NULL, &attr_op, &udata) < 0)
+        if(H5A__dense_iterate(f, (hid_t)0, ainfo, H5_INDEX_NAME, H5_ITER_NATIVE,
+                (hsize_t)0, NULL, &attr_op, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")
 
         /* Sort attribute table in correct iteration order */
@@ -1471,11 +1682,11 @@ H5A_dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
 
 done:
     /* Release resources */
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_build_table() */
+} /* end H5A__dense_build_table() */
 
 
 /*-------------------------------------------------------------------------
@@ -1650,7 +1861,7 @@ H5A__attr_sort_table(H5A_attr_table_t *atable, H5_index_t idx_type,
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_attr_iterate_table
+ * Function:	H5A__attr_iterate_table
  *
  * Purpose:     Iterate over table containing a list of attributes for an object,
  *              making appropriate callbacks
@@ -1664,14 +1875,14 @@ H5A__attr_sort_table(H5A_attr_table_t *atable, H5_index_t idx_type,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_attr_iterate_table(const H5A_attr_table_t *atable, hsize_t skip,
+H5A__attr_iterate_table(const H5A_attr_table_t *atable, hsize_t skip,
     hsize_t *last_attr, hid_t loc_id, const H5A_attr_iter_op_t *attr_op,
     void *op_data)
 {
     size_t u;                           /* Local index variable */
     herr_t ret_value = H5_ITER_CONT;   /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(atable);
@@ -1729,11 +1940,11 @@ H5A_attr_iterate_table(const H5A_attr_table_t *atable, hsize_t skip,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_attr_iterate_table() */
+} /* end H5A__attr_iterate_table() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	  H5A_attr_release_table
+ * Function:	  H5A__attr_release_table
  *
  * Purpose:       Release table containing a list of attributes for an object
  *
@@ -1746,11 +1957,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_attr_release_table(H5A_attr_table_t *atable)
+H5A__attr_release_table(H5A_attr_table_t *atable)
 {
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(atable);
@@ -1761,7 +1972,7 @@ H5A_attr_release_table(H5A_attr_table_t *atable)
 
         /* Free attribute message information */
         for(u = 0; u < atable->nattrs; u++)
-            if(atable->attrs[u] && H5A_close(atable->attrs[u]) < 0)
+            if(atable->attrs[u] && H5A__close(atable->attrs[u]) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute")
     } /* end if */
     else
@@ -1771,11 +1982,11 @@ H5A_attr_release_table(H5A_attr_table_t *atable)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_attr_release_table() */
+} /* end H5A__attr_release_table() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5A_get_ainfo
+ * Function:    H5A__get_ainfo
  *
  * Purpose:     Retrieves the "attribute info" message for an object.  Also
  *              sets the number of attributes correctly, if it isn't set up yet.
@@ -1790,12 +2001,12 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5A_get_ainfo(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_ainfo_t *ainfo)
+H5A__get_ainfo(H5F_t *f, H5O_t *oh, H5O_ainfo_t *ainfo)
 {
     H5B2_t *bt2_name = NULL;    /* v2 B-tree handle for name index */
     htri_t ret_value = FAIL;    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oh->cache_info.addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(oh->cache_info.addr, FAIL)
 
     /* check arguments */
     HDassert(f);
@@ -1807,7 +2018,7 @@ H5A_get_ainfo(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_ainfo_t *ainfo)
 	HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "unable to check object header")
     if(ret_value > 0) {
         /* Retrieve the "attribute info" structure */
-        if(NULL == H5O_msg_read_oh(f, dxpl_id, oh, H5O_AINFO_ID, ainfo))
+        if(NULL == H5O_msg_read_oh(f, oh, H5O_AINFO_ID, ainfo))
 	    HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't read AINFO message")
 
         /* Check if we don't know how many attributes there are */
@@ -1815,7 +2026,7 @@ H5A_get_ainfo(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_ainfo_t *ainfo)
             /* Check if we are using "dense" attribute storage */
             if(H5F_addr_defined(ainfo->fheap_addr)) {
                 /* Open the name index v2 B-tree */
-                if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo->name_bt2_addr, NULL)))
+                if(NULL == (bt2_name = H5B2_open(f, ainfo->name_bt2_addr, NULL)))
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
                 /* Retrieve # of records in "name" B-tree */
@@ -1831,22 +2042,22 @@ H5A_get_ainfo(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_ainfo_t *ainfo)
 
 done:
     /* Release resources */
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5A_get_ainfo() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5A__get_ainfo() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5A_set_version
+ * Function:    H5A__set_version
  *
  * Purpose:     Sets the correct version to encode attribute with.
- *              Chooses the oldest version possible, unless the "use the
- *              latest format" flag is set.
+ *              Chooses the oldest version possible, unless the
+ *              file's low bound indicates otherwise.
  *
- * Return:	Success:        Non-negative
- *		Failure:	Negative
+ * Return:	Success:    Non-negative
+ *          Failure:    Negative
  *
  * Programmer:  Quincey Koziol
  *              koziol@hdfgroup.org
@@ -1855,21 +2066,18 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_set_version(const H5F_t *f, H5A_t *attr)
+H5A__set_version(const H5F_t *f, H5A_t *attr)
 {
     hbool_t type_shared, space_shared;  /* Flags to indicate that shared messages are used for this attribute */
-    hbool_t use_latest_format;          /* Flag indicating the latest attribute version support is enabled */
-    herr_t ret_value = SUCCEED;   /* Return value */
+    uint8_t version;                    /* Message version */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check arguments */
     HDassert(f);
     HDassert(attr);
 
-    /* Get the file's 'use the latest attribute version support' flag */
-    use_latest_format = H5F_USE_LATEST_FLAGS(f, H5F_LATEST_ATTRIBUTE);
-
     /* Check whether datatype and dataspace are shared */
     if(H5O_msg_is_shared(H5O_DTYPE_ID, attr->shared->dt) > 0)
         type_shared = TRUE;
@@ -1882,22 +2090,30 @@ H5A_set_version(const H5F_t *f, H5A_t *attr)
         space_shared = FALSE;
 
     /* Check which version to encode attribute with */
-    if(use_latest_format)
-        attr->shared->version = H5O_ATTR_VERSION_LATEST;      /* Write out latest attribute version */
-    else if(attr->shared->encoding != H5T_CSET_ASCII)
-        attr->shared->version = H5O_ATTR_VERSION_3;   /* Write version which includes the character encoding */
+    if(attr->shared->encoding != H5T_CSET_ASCII)
+        version = H5O_ATTR_VERSION_3;   /* Write version which includes the character encoding */
     else if(type_shared || space_shared)
-        attr->shared->version = H5O_ATTR_VERSION_2;   /* Write out version with flag for indicating shared datatype or dataspace */
+        version = H5O_ATTR_VERSION_2;   /* Write out version with flag for indicating shared datatype or dataspace */
     else
-        attr->shared->version = H5O_ATTR_VERSION_1;   /* Write out basic version */
+        version = H5O_ATTR_VERSION_1;   /* Write out basic version */
+
+    /* Upgrade to the version indicated by the file's low bound if higher */
+    version = MAX(version, (uint8_t)H5O_attr_ver_bounds[H5F_LOW_BOUND(f)]);
+
+    /* Version bounds check */
+    if(version > H5O_attr_ver_bounds[H5F_HIGH_BOUND(f)])
+        HGOTO_ERROR(H5E_ATTR, H5E_BADRANGE, FAIL, "attribute version out of bounds")
+
+    /* Set the message version */
+    attr->shared->version = version;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_set_version() */
+} /* end H5A__set_version() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5A_attr_copy_file
+ * Function:    H5A__attr_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
  *
@@ -1917,8 +2133,8 @@ done:
  *-------------------------------------------------------------------------
  */
 H5A_t *
-H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_size,
-    H5O_copy_t *cpy_info, hid_t dxpl_id)
+H5A__attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_size,
+    H5O_copy_t *cpy_info)
 {
     H5A_t      *attr_dst = NULL;        /* Destination attribute */
     hid_t       tid_src = -1;           /* Datatype ID for source datatype */
@@ -1933,7 +2149,7 @@ H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_si
     size_t	dst_dt_size;		/* Size of destination attribute datatype */
     H5A_t      *ret_value = NULL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(attr_src);
@@ -1998,9 +2214,9 @@ H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_si
      * final size of the messages.  This does nothing if the datatype is
      * committed or sharing is disabled.
      */
-    if(H5SM_try_share(file_dst, dxpl_id, NULL, H5SM_DEFER, H5O_DTYPE_ID, attr_dst->shared->dt, NULL) < 0)
+    if(H5SM_try_share(file_dst, NULL, H5SM_DEFER, H5O_DTYPE_ID, attr_dst->shared->dt, NULL) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, NULL, "can't share attribute datatype")
-    if(H5SM_try_share(file_dst, dxpl_id, NULL, H5SM_DEFER, H5O_SDSPACE_ID, attr_dst->shared->ds, NULL) < 0)
+    if(H5SM_try_share(file_dst, NULL, H5SM_DEFER, H5O_SDSPACE_ID, attr_dst->shared->ds, NULL) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, NULL, "can't share attribute dataspace")
 
     /* Compute the sizes of the datatype and dataspace. This is their raw
@@ -2060,9 +2276,9 @@ H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_si
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register destination file datatype")
 
             /* Set up the conversion functions */
-            if(NULL == (tpath_src_mem = H5T_path_find(attr_src->shared->dt, dt_mem, NULL, NULL, dxpl_id, FALSE)))
+            if(NULL == (tpath_src_mem = H5T_path_find(attr_src->shared->dt, dt_mem)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to convert between src and mem datatypes")
-            if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, attr_dst->shared->dt, NULL, NULL, dxpl_id, FALSE)))
+            if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, attr_dst->shared->dt)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to convert between mem and dst datatypes")
 
             /* Determine largest datatype size */
@@ -2111,7 +2327,7 @@ H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_si
 		    HGOTO_ERROR(H5E_ATTR, H5E_CANTALLOC, NULL, "memory allocation failed")
 
             /* Convert from source file to memory */
-            if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, bkg_buf, dxpl_id) < 0)
+            if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, bkg_buf) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "datatype conversion NULLed")
 
             HDmemcpy(reclaim_buf, buf, buf_size);
@@ -2121,12 +2337,12 @@ H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_si
 		HDmemset(bkg_buf, 0, buf_size);
 
             /* Convert from memory to destination file */
-            if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg_buf, dxpl_id) < 0)
+            if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg_buf) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "datatype conversion NULLed")
 
             HDmemcpy(attr_dst->shared->data, buf, attr_dst->shared->data_size);
 
-            if(H5D_vlen_reclaim(tid_mem, buf_space, dxpl_id, reclaim_buf) < 0)
+            if(H5D_vlen_reclaim(tid_mem, buf_space, reclaim_buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_BADITER, NULL, "unable to reclaim variable-length data")
         }  /* end if */
         else {
@@ -2139,7 +2355,7 @@ H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_si
     attr_dst->shared->crt_idx = attr_src->shared->crt_idx;
 
     /* Recompute the version to encode the destination attribute */
-    if(H5A_set_version(file_dst, attr_dst) < 0)
+    if(H5A__set_version(file_dst, attr_dst) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, NULL, "unable to update attribute version")
 
     /* Recompute the destination attribute's size, if it's a different version */
@@ -2172,15 +2388,15 @@ done:
         bkg_buf = H5FL_BLK_FREE(attr_buf, bkg_buf);
 
     /* Release destination attribute information on failure */
-    if(!ret_value && attr_dst && H5A_close(attr_dst) < 0)
+    if(!ret_value && attr_dst && H5A__close(attr_dst) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, NULL, "can't close attribute")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5A_attr_copy_file() */
+} /* H5A__attr_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5A_attr_post_copy_file
+ * Function:    H5A__attr_post_copy_file
  *
  * Purpose:     Finish copying a message from between files.
  *              We have to copy the values of a reference attribute in the
@@ -2196,13 +2412,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *attr_src,
-    H5O_loc_t *dst_oloc, const H5A_t *attr_dst, hid_t dxpl_id, H5O_copy_t *cpy_info)
+H5A__attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *attr_src,
+    H5O_loc_t *dst_oloc, const H5A_t *attr_dst, H5O_copy_t *cpy_info)
 {
     H5F_t  *file_src, *file_dst;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(src_oloc);
@@ -2231,7 +2447,7 @@ H5A_attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *attr_src,
         dst_oloc_dt->file = file_dst;
 
         /* Copy the shared object from source to destination */
-        if(H5O_copy_header_map(src_oloc_dt, dst_oloc_dt, dxpl_id, cpy_info, FALSE, NULL, NULL) < 0)
+        if(H5O_copy_header_map(src_oloc_dt, dst_oloc_dt, cpy_info, FALSE, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
 
         /* Update shared message info from named datatype info */
@@ -2241,9 +2457,9 @@ H5A_attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *attr_src,
     /* Try to share both the datatype and dataset.  This does nothing if the
      * datatype is committed or sharing is disabled.
      */
-    if(H5SM_try_share(file_dst, dxpl_id, NULL, H5SM_WAS_DEFERRED, H5O_DTYPE_ID, attr_dst->shared->dt, NULL) < 0)
+    if(H5SM_try_share(file_dst, NULL, H5SM_WAS_DEFERRED, H5O_DTYPE_ID, attr_dst->shared->dt, NULL) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "can't share attribute datatype")
-    if(H5SM_try_share(file_dst, dxpl_id, NULL, H5SM_WAS_DEFERRED, H5O_SDSPACE_ID, attr_dst->shared->ds, NULL) < 0)
+    if(H5SM_try_share(file_dst, NULL, H5SM_WAS_DEFERRED, H5O_SDSPACE_ID, attr_dst->shared->ds, NULL) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "can't share attribute dataspace")
 
     /* Only need to fix reference attribute with real data being copied to
@@ -2263,8 +2479,7 @@ H5A_attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *attr_src,
             ref_count = attr_dst->shared->data_size / H5T_get_size(attr_dst->shared->dt);
 
             /* Copy objects referenced in source buffer to destination file and set destination elements */
-            if(H5O_copy_expand_ref(file_src, attr_dst->shared->data, dxpl_id,
-                    file_dst, attr_dst->shared->data, ref_count, H5T_get_ref_type(attr_dst->shared->dt), cpy_info) < 0)
+            if(H5O_copy_expand_ref(file_src, attr_dst->shared->data, file_dst, attr_dst->shared->data, ref_count, H5T_get_ref_type(attr_dst->shared->dt), cpy_info) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, FAIL, "unable to copy reference attribute")
         } /* end if */
         else
@@ -2274,7 +2489,7 @@ H5A_attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *attr_src,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5A_attr_post_copy_file() */
+} /* H5A__attr_post_copy_file() */
 
 
 /*-------------------------------------------------------------------------
@@ -2307,12 +2522,10 @@ H5A__dense_post_copy_file_cb(const H5A_t *attr_src, void *_udata)
     HDassert(udata->file);
     HDassert(udata->cpy_info);
 
-    if(NULL == (attr_dst = H5A_attr_copy_file(attr_src, udata->file,
-            udata->recompute_size, udata->cpy_info,  udata->dxpl_id)))
+    if(NULL == (attr_dst = H5A__attr_copy_file(attr_src, udata->file, udata->recompute_size, udata->cpy_info)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")
 
-    if(H5A_attr_post_copy_file(udata->oloc_src, attr_src, udata->oloc_dst, attr_dst,
-            udata->dxpl_id, udata->cpy_info) < 0)
+    if(H5A__attr_post_copy_file(udata->oloc_src, attr_src, udata->oloc_dst, attr_dst, udata->cpy_info) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")
 
     /* Reset shared location information */
@@ -2320,17 +2533,17 @@ H5A__dense_post_copy_file_cb(const H5A_t *attr_src, void *_udata)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to reset attribute sharing")
 
     /* Set COPIED tag for destination object's metadata */
-    H5_BEGIN_TAG(udata->dxpl_id, H5AC__COPIED_TAG, H5_ITER_ERROR);
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Insert attribute into dense storage */
-    if(H5A_dense_insert(udata->file, udata->dxpl_id, udata->ainfo, attr_dst) < 0)
+    if(H5A__dense_insert(udata->file, udata->ainfo, attr_dst) < 0)
         HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to add to dense storage")
 
     /* Reset metadata tag */
-    H5_END_TAG(H5_ITER_ERROR);
+    H5_END_TAG
 
 done:
-    if(attr_dst && H5A_close(attr_dst) < 0)
+    if(attr_dst && H5A__close(attr_dst) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CLOSEERROR, FAIL, "can't close destination attribute")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2338,7 +2551,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5A_dense_post_copy_file_all
+ * Function:    H5A__dense_post_copy_file_all
  *
  * Purpose:     Copy all dense attributes from SRC to DST.
  *
@@ -2352,15 +2565,15 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_dense_post_copy_file_all(const H5O_loc_t *src_oloc, const H5O_ainfo_t *ainfo_src,
-    H5O_loc_t *dst_oloc, H5O_ainfo_t *ainfo_dst, hid_t dxpl_id, H5O_copy_t *cpy_info)
+H5A__dense_post_copy_file_all(const H5O_loc_t *src_oloc, const H5O_ainfo_t *ainfo_src,
+    H5O_loc_t *dst_oloc, H5O_ainfo_t *ainfo_dst, H5O_copy_t *cpy_info)
 {
     H5A_dense_file_cp_ud_t udata;       /* User data for iteration callback */
     H5A_attr_iter_op_t attr_op;         /* Attribute operator */
     hbool_t recompute_size = FALSE;     /* recompute the size */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check arguments */
     HDassert(ainfo_src);
@@ -2370,24 +2583,56 @@ H5A_dense_post_copy_file_all(const H5O_loc_t *src_oloc, const H5O_ainfo_t *ainfo
     udata.file = dst_oloc->file;              /* Destination file                 */
     udata.recompute_size = &recompute_size;   /* Flag to indicate if size changed */
     udata.cpy_info = cpy_info;                /* Information on copying options   */
-    udata.dxpl_id = dxpl_id;                  /* DXPL for operation               */
     udata.oloc_src = src_oloc;
     udata.oloc_dst = dst_oloc;
 
     attr_op.op_type = H5A_ATTR_OP_LIB;
     attr_op.u.lib_op = H5A__dense_post_copy_file_cb;
 
-    if(H5A_dense_iterate(src_oloc->file, dxpl_id, (hid_t)0, ainfo_src, H5_INDEX_NAME,
+    if(H5A__dense_iterate(src_oloc->file, (hid_t)0, ainfo_src, H5_INDEX_NAME,
             H5_ITER_NATIVE, (hsize_t)0, NULL, &attr_op, &udata) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_dense_post_copy_file_all */
+} /* end H5A__dense_post_copy_file_all */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__rename
+ *
+ * Purpose:     Private version of H5Arename
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              renaming attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__rename(const H5G_loc_t *loc, const char *old_name, const char *new_name)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Call object header attribute rename routine */
+    if(H5O__attr_rename(loc->oloc, old_name, new_name) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__rename() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_rename_by_name
+ * Function:	H5A__rename_by_name
  *
  * Purpose:     Private version of H5Arename_by_name
  *
@@ -2400,8 +2645,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_rename_by_name(H5G_loc_t loc, const char *obj_name, const char *old_attr_name,
-                   const char *new_attr_name, hid_t lapl_id, hid_t dxpl_id)
+H5A__rename_by_name(H5G_loc_t loc, const char *obj_name, const char *old_attr_name,
+    const char *new_attr_name)
 {
     H5G_loc_t   obj_loc;                /* Location used to open group */
     H5G_name_t  obj_path;            	/* Opened object group hier. path */
@@ -2409,29 +2654,376 @@ H5A_rename_by_name(H5G_loc_t loc, const char *obj_name, const char *old_attr_nam
     hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
-    /* Avoid thrashing things if the names are the same */
-    if(HDstrcmp(old_attr_name, new_attr_name)) {
-        /* Set up opened group location to fill in */
-        obj_loc.oloc = &obj_oloc;
-        obj_loc.path = &obj_path;
-        H5G_loc_reset(&obj_loc);
-
-        /* Find the object's location */
-        if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-            HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
-        loc_found = TRUE;
-
-        /* Call attribute rename routine */
-        if(H5O_attr_rename(obj_loc.oloc, dxpl_id, old_attr_name, new_attr_name) < 0)
-            HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
-    } /* end if */
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Call attribute rename routine */
+    if(H5O__attr_rename(obj_loc.oloc, old_attr_name, new_attr_name) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTRENAME, FAIL, "can't rename attribute")
 
 done:
     /* Release resources */
     if(loc_found && H5G_loc_free(&obj_loc) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
 
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__rename_by_name() */
+
+#ifndef H5_NO_DEPRECATED_SYMBOLS
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__get_num_attrs
+ *
+ * Purpose:     Private version of deprecated H5Aget_num_attrs
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              querying the attribute count that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5A__get_num_attrs(const H5O_loc_t *loc)
+{
+    int ret_value = FAIL;       /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Look up the # of attributes for the object */
+    if((ret_value = H5O__attr_count(loc)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTCOUNT, FAIL, "can't get attribute count for object")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__get_num_attrs() */
+#endif /* H5_NO_DEPRECATED_SYMBOLS */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__iterate_common
+ *
+ * Purpose:     Internal common version of H5Aiterate
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5A__iterate_common(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order,
+    hsize_t *idx, H5A_attr_iter_op_t *attr_op, void *op_data)
+{
+    hsize_t start_idx;          /* Index of attribute to start iterating at */
+    hsize_t last_attr;          /* Index of last attribute examined */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Call attribute iteration routine */
+    last_attr = start_idx = (idx ? *idx : 0);
+    if((ret_value = H5O__attr_iterate(loc_id, idx_type, order, start_idx, &last_attr, attr_op, op_data)) < 0)
+        HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
+
+    /* Set the last attribute information */
+    if(idx)
+        *idx = last_attr;
+
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5A_rename_by_name() */
+} /* H5A__iterate_common() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__iterate
+ *
+ * Purpose:     Private version of H5Aiterate2
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              iterating over attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__iterate(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order,
+    hsize_t *idx, H5A_operator2_t op, void *op_data)
+{
+    H5A_attr_iter_op_t  attr_op;        /* Attribute operator */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Build attribute operator info */
+    attr_op.op_type = H5A_ATTR_OP_APP2;
+    attr_op.u.app_op2 = op;
+
+    /* Call internal attribute iteration routine */
+    if((ret_value = H5A__iterate_common(loc_id, idx_type, order, idx, &attr_op, op_data)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error iterating over attributes")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__iterate() */
+
+#ifndef H5_NO_DEPRECATED_SYMBOLS
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__iterate_old
+ *
+ * Purpose:     Private version of H5Aiterate1
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__iterate_old(hid_t loc_id, unsigned *attr_num, H5A_operator1_t op,
+    void *op_data)
+{
+    H5A_attr_iter_op_t  attr_op;        /* Attribute operator */
+    hsize_t idx;                        /* Index of attribute to start iterating at */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Build attribute operator info */
+    attr_op.op_type = H5A_ATTR_OP_APP;
+    attr_op.u.app_op = op;
+
+    /* Set up index */
+    idx = (hsize_t)(attr_num ? *attr_num : 0);
+
+    /* Call internal attribute iteration routine */
+    if((ret_value = H5A__iterate_common(loc_id, H5_INDEX_CRT_ORDER, H5_ITER_INC, &idx, &attr_op, op_data)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error iterating over attributes")
+
+    /* Translate hsize_t index value to legacy unsigned index value*/
+    if(attr_num)
+        *attr_num = (unsigned)idx;
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__iterate_old() */
+#endif /* H5_NO_DEPRECATED_SYMBOLS */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__iterate_by_name
+ *
+ * Purpose:     Private version of H5Aiterate_by_name
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              iterating over attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__iterate_by_name(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type, H5_iter_order_t order, hsize_t *idx, H5A_operator2_t op,
+    void *op_data)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;               /* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;               /* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
+    hid_t       obj_loc_id = (-1);      /* ID for object located */
+    H5A_attr_iter_op_t  attr_op;        /* Attribute operator */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Open the object */
+    if((obj_loc_id = H5O__open_by_loc(&obj_loc, TRUE)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
+
+    /* Build attribute operator info */
+    attr_op.op_type = H5A_ATTR_OP_APP2;
+    attr_op.u.app_op2 = op;
+
+    /* Call attribute iteration routine */
+    if((ret_value = H5A__iterate_common(obj_loc_id, idx_type, order, idx, &attr_op, op_data)) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error iterating over attributes")
+
+done:
+    /* Release resources */
+    if(obj_loc_id > 0) {
+        if(H5I_dec_app_ref(obj_loc_id) < 0)
+            HDONE_ERROR(H5E_ATTR, H5E_CANTDEC, FAIL, "unable to close temporary object")
+    } /* end if */
+    else if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__iterate_by_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__delete
+ *
+ * Purpose:     Private version of H5Adelete
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              deleting attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__delete(const H5G_loc_t *loc, const char *name)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Call object header attribute delete attribute routine */
+    if(H5O__attr_remove(loc->oloc, name) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__delete() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__delete_by_name
+ *
+ * Purpose:     Private version of H5Adelete_by_name
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__delete_by_name(const H5G_loc_t *loc, const char *obj_name, const char *attr_name)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Delete the attribute from the location */
+    if(H5O__attr_remove(obj_loc.oloc, attr_name) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
+
+done:
+    /* Release resources */
+    if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__delete_by_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5A__delete_by_idx
+ *
+ * Purpose:     Private version of H5Adelete_by_idx
+ *
+ * Return:	Success:             Non-negative
+ *		Failure:             Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              December 6, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5A__delete_by_idx(const H5G_loc_t *loc, const char *obj_name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'obj_name' found */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(loc, obj_name, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Delete the attribute from the location */
+    if(H5O__attr_remove_by_idx(obj_loc.oloc, idx_type, order, n) < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
+
+done:
+    /* Release resources */
+    if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, FAIL, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5A__delete_by_idx() */
+
diff --git a/src/H5Amodule.h b/src/H5Amodule.h
index e347fe1..8ed056b 100644
--- a/src/H5Amodule.h
+++ b/src/H5Amodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Apkg.h b/src/H5Apkg.h
index 5858147..3315cc1 100644
--- a/src/H5Apkg.h
+++ b/src/H5Apkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -131,7 +129,6 @@ typedef herr_t (*H5A_bt2_found_t)(const H5A_t *attr, hbool_t *took_ownership, vo
 typedef struct H5A_bt2_ud_common_t {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
     H5HF_t      *shared_fheap;          /* Fractal heap handle for shared messages */
     const char  *name;                  /* Name of attribute to compare      */
@@ -184,93 +181,111 @@ H5_DLLVAR const H5B2_class_t H5A_BT2_CORDER[1];
 /******************************/
 
 /* Function prototypes for H5A package scope */
-H5_DLL H5A_t *H5A_create(const H5G_loc_t *loc, const char *name,
-    const H5T_t *type, const H5S_t *space, hid_t acpl_id, hid_t dxpl_id);
-H5_DLL H5A_t *H5A_open_by_name(const H5G_loc_t *loc, const char *obj_name,
-    const char *attr_name, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL H5A_t *H5A_open_by_idx(const H5G_loc_t *loc, const char *obj_name,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL herr_t H5A__open_common(const H5G_loc_t *loc, H5A_t *attr);
-H5_DLL H5A_t *H5A_copy(H5A_t *new_attr, const H5A_t *old_attr);
+H5_DLL H5A_t *H5A__create(const H5G_loc_t *loc, const char *attr_name,
+    const H5T_t *type, const H5S_t *space, hid_t acpl_id);
+H5_DLL H5A_t *H5A__create_by_name(const H5G_loc_t *loc, const char *obj_name,
+    const char *attr_name, const H5T_t *type, const H5S_t *space,
+    hid_t acpl_id);
+H5_DLL H5A_t *H5A__open(const H5G_loc_t *loc, const char *attr_name);
+H5_DLL H5A_t *H5A__open_by_name(const H5G_loc_t *loc, const char *obj_name,
+    const char *attr_name);
+H5_DLL H5A_t *H5A__open_by_idx(const H5G_loc_t *loc, const char *obj_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n);
+H5_DLL H5A_t *H5A__copy(H5A_t *new_attr, const H5A_t *old_attr);
+H5_DLL hid_t H5A__get_type(H5A_t *attr);
 H5_DLL herr_t H5A__get_info(const H5A_t *attr, H5A_info_t *ainfo);
-H5_DLL hid_t H5A_get_create_plist(H5A_t* attr);
-H5_DLL herr_t H5A_free(H5A_t *attr);
-H5_DLL herr_t H5A_close(H5A_t *attr);
-H5_DLL htri_t H5A_get_ainfo(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_ainfo_t *ainfo);
-H5_DLL herr_t H5A_set_version(const H5F_t *f, H5A_t *attr);
-H5_DLL herr_t H5A_rename_by_name(H5G_loc_t loc, const char *obj_name, const char *old_attr_name,
-    const char *new_attr_name, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL htri_t H5A_exists_by_name(H5G_loc_t loc, const char *obj_name, const char *attr_name,
-    hid_t lapl_id, hid_t dxpl_id);
-H5_DLL herr_t H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf, hid_t dxpl_id);
-H5_DLL herr_t H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf, hid_t dxpl_id);
+H5_DLL hid_t H5A__get_create_plist(H5A_t* attr);
+H5_DLL herr_t H5A__free(H5A_t *attr);
+H5_DLL herr_t H5A__close(H5A_t *attr);
+H5_DLL herr_t H5A__close_cb(H5A_t *attr);
+H5_DLL htri_t H5A__get_ainfo(H5F_t *f, H5O_t *oh, H5O_ainfo_t *ainfo);
+H5_DLL herr_t H5A__set_version(const H5F_t *f, H5A_t *attr);
+H5_DLL herr_t H5A__rename(const H5G_loc_t *loc, const char *old_name,
+    const char *new_name);
+H5_DLL herr_t H5A__rename_by_name(H5G_loc_t loc, const char *obj_name, const char *old_attr_name,
+    const char *new_attr_name);
+#ifndef H5_NO_DEPRECATED_SYMBOLS
+H5_DLL int H5A__get_num_attrs(const H5O_loc_t *loc);
+#endif /* H5_NO_DEPRECATED_SYMBOLS */
+H5_DLL herr_t H5A__iterate(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order,
+    hsize_t *idx, H5A_operator2_t op, void *op_data);
+H5_DLL herr_t H5A__iterate_by_name(const H5G_loc_t *loc, const char *obj_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t *idx, H5A_operator2_t op,
+    void *op_data);
+#ifndef H5_NO_DEPRECATED_SYMBOLS
+H5_DLL herr_t H5A__iterate_old(hid_t loc_id, unsigned *attr_num,
+    H5A_operator1_t op, void *op_data);
+#endif /* H5_NO_DEPRECATED_SYMBOLS */
+H5_DLL herr_t H5A__delete(const H5G_loc_t *loc, const char *name);
+H5_DLL herr_t H5A__delete_by_name(const H5G_loc_t *loc, const char *obj_name,
+    const char *attr_name);
+H5_DLL herr_t H5A__delete_by_idx(const H5G_loc_t *loc, const char *obj_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n);
+H5_DLL htri_t H5A__exists(const H5G_loc_t *loc, const char *name);
+H5_DLL htri_t H5A__exists_by_name(H5G_loc_t loc, const char *obj_name, const char *attr_name);
+H5_DLL herr_t H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf);
+H5_DLL herr_t H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf);
 H5_DLL ssize_t H5A__get_name(H5A_t *attr, size_t buf_size, char *buf);
 
 /* Attribute "dense" storage routines */
-H5_DLL herr_t H5A_dense_create(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo);
-H5_DLL H5A_t *H5A_dense_open(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
-    const char *name);
-H5_DLL herr_t H5A_dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
-    H5A_t *attr);
-H5_DLL herr_t H5A_dense_write(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
-    H5A_t *attr);
-H5_DLL herr_t H5A_dense_rename(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
+H5_DLL herr_t H5A__dense_create(H5F_t *f, H5O_ainfo_t *ainfo);
+H5_DLL H5A_t *H5A__dense_open(H5F_t *f, const H5O_ainfo_t *ainfo, const char *name);
+H5_DLL herr_t H5A__dense_insert(H5F_t *f, const H5O_ainfo_t *ainfo, H5A_t *attr);
+H5_DLL herr_t H5A__dense_write(H5F_t *f, const H5O_ainfo_t *ainfo, H5A_t *attr);
+H5_DLL herr_t H5A__dense_rename(H5F_t *f, const H5O_ainfo_t *ainfo,
     const char *old_name, const char *new_name);
-H5_DLL herr_t H5A_dense_iterate(H5F_t *f, hid_t dxpl_id, hid_t loc_id,
-    const H5O_ainfo_t *ainfo, H5_index_t idx_type, H5_iter_order_t order,
-    hsize_t skip, hsize_t *last_attr, const H5A_attr_iter_op_t *attr_op,
-    void *op_data);
-H5_DLL herr_t H5A_dense_remove(H5F_t *f, hid_t dxpl_id,
-    const H5O_ainfo_t *ainfo, const char *name);
-H5_DLL herr_t H5A_dense_remove_by_idx(H5F_t *f, hid_t dxpl_id,
-    const H5O_ainfo_t *ainfo, H5_index_t idx_type, H5_iter_order_t order,
-    hsize_t n);
-H5_DLL htri_t H5A_dense_exists(H5F_t *f, hid_t dxpl_id, const H5O_ainfo_t *ainfo,
+H5_DLL herr_t H5A__dense_iterate(H5F_t *f, hid_t loc_id, const H5O_ainfo_t *ainfo,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_attr,
+    const H5A_attr_iter_op_t *attr_op, void *op_data);
+H5_DLL herr_t H5A__dense_remove(H5F_t *f, const H5O_ainfo_t *ainfo,
     const char *name);
-H5_DLL herr_t H5A_dense_delete(H5F_t *f, hid_t dxpl_id, H5O_ainfo_t *ainfo);
+H5_DLL herr_t H5A__dense_remove_by_idx(H5F_t *f, const H5O_ainfo_t *ainfo,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n);
+H5_DLL htri_t H5A__dense_exists(H5F_t *f, const H5O_ainfo_t *ainfo,
+    const char *name);
+H5_DLL herr_t H5A__dense_delete(H5F_t *f, H5O_ainfo_t *ainfo);
 
 /* Attribute table operations */
-H5_DLL herr_t H5A_compact_build_table(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
+H5_DLL herr_t H5A__compact_build_table(H5F_t *f, H5O_t *oh, H5_index_t idx_type,
+    H5_iter_order_t order, H5A_attr_table_t *atable);
+H5_DLL herr_t H5A__dense_build_table(H5F_t *f, const H5O_ainfo_t *ainfo,
     H5_index_t idx_type, H5_iter_order_t order, H5A_attr_table_t *atable);
-H5_DLL herr_t H5A_dense_build_table(H5F_t *f, hid_t dxpl_id,
-    const H5O_ainfo_t *ainfo, H5_index_t idx_type, H5_iter_order_t order,
-    H5A_attr_table_t *atable);
-H5_DLL herr_t H5A_attr_iterate_table(const H5A_attr_table_t *atable,
+H5_DLL herr_t H5A__attr_iterate_table(const H5A_attr_table_t *atable,
     hsize_t skip, hsize_t *last_attr, hid_t loc_id,
     const H5A_attr_iter_op_t *attr_op, void *op_data);
-H5_DLL herr_t H5A_attr_release_table(H5A_attr_table_t *atable);
+H5_DLL herr_t H5A__attr_release_table(H5A_attr_table_t *atable);
 
 /* Attribute operations */
-H5_DLL herr_t H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr);
-H5_DLL H5A_t *H5O_attr_open_by_name(const H5O_loc_t *loc, const char *name,
-    hid_t dxpl_id);
-H5_DLL H5A_t *H5O_attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, hid_t dxpl_id);
-H5_DLL herr_t H5O_attr_update_shared(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-        H5A_t *attr, H5O_shared_t *sh_mesg);
-H5_DLL herr_t H5O_attr_write(const H5O_loc_t *loc, hid_t dxpl_id,
-    H5A_t *attr);
-H5_DLL herr_t H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id,
-    const char *old_name, const char *new_name);
-H5_DLL herr_t H5O_attr_remove(const H5O_loc_t *loc, const char *name,
-    hid_t dxpl_id);
-H5_DLL herr_t H5O_attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, hid_t dxpl_id);
-H5_DLL htri_t H5O_attr_exists(const H5O_loc_t *loc, const char *name, hid_t dxpl_id);
+H5_DLL herr_t H5O__attr_create(const H5O_loc_t *loc, H5A_t *attr);
+H5_DLL H5A_t *H5O__attr_open_by_name(const H5O_loc_t *loc, const char *name);
+H5_DLL H5A_t *H5O__attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n);
+H5_DLL herr_t H5O__attr_update_shared(H5F_t *f, H5O_t *oh, H5A_t *attr,
+    H5O_shared_t *sh_mesg);
+H5_DLL herr_t H5O__attr_write(const H5O_loc_t *loc, H5A_t *attr);
+H5_DLL herr_t H5O__attr_rename(const H5O_loc_t *loc, const char *old_name,
+    const char *new_name);
+H5_DLL herr_t H5O__attr_iterate(hid_t loc_id, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t skip, hsize_t *last_attr,
+    const H5A_attr_iter_op_t *op, void *op_data);
+H5_DLL herr_t H5O__attr_remove(const H5O_loc_t *loc, const char *name);
+H5_DLL herr_t H5O__attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n);
+H5_DLL htri_t H5O__attr_exists(const H5O_loc_t *loc, const char *name);
 #ifndef H5_NO_DEPRECATED_SYMBOLS
-H5_DLL int H5O_attr_count(const H5O_loc_t *loc, hid_t dxpl_id);
+H5_DLL int H5O__attr_count(const H5O_loc_t *loc);
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
-H5_DLL H5A_t *H5A_attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_size,
-    H5O_copy_t *cpy_info, hid_t dxpl_id);
-H5_DLL herr_t H5A_attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *mesg_src,
-    H5O_loc_t *dst_oloc, const H5A_t *mesg_dst, hid_t dxpl_id, H5O_copy_t *cpy_info);
-H5_DLL herr_t H5A_dense_post_copy_file_all(const H5O_loc_t *src_oloc, const H5O_ainfo_t * ainfo_src,
-    H5O_loc_t *dst_oloc, H5O_ainfo_t *ainfo_dst, hid_t dxpl_id, H5O_copy_t *cpy_info);
+H5_DLL H5A_t *H5A__attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_size,
+    H5O_copy_t *cpy_info);
+H5_DLL herr_t H5A__attr_post_copy_file(const H5O_loc_t *src_oloc, const H5A_t *mesg_src,
+    H5O_loc_t *dst_oloc, const H5A_t *mesg_dst, H5O_copy_t *cpy_info);
+H5_DLL herr_t H5A__dense_post_copy_file_all(const H5O_loc_t *src_oloc, const H5O_ainfo_t * ainfo_src,
+    H5O_loc_t *dst_oloc, H5O_ainfo_t *ainfo_dst, H5O_copy_t *cpy_info);
 
 /* Testing functions */
 #ifdef H5A_TESTING
-H5_DLL htri_t H5A_is_shared_test(hid_t aid);
-H5_DLL herr_t H5A_get_shared_rc_test(hid_t attr_id, hsize_t *ref_count);
+H5_DLL htri_t H5A__is_shared_test(hid_t aid);
+H5_DLL herr_t H5A__get_shared_rc_test(hid_t attr_id, hsize_t *ref_count);
 #endif /* H5A_TESTING */
 
 #endif /* _H5Apkg_H */
diff --git a/src/H5Aprivate.h b/src/H5Aprivate.h
index 6b62692..342ffc8 100644
--- a/src/H5Aprivate.h
+++ b/src/H5Aprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -78,14 +76,10 @@ typedef struct H5A_attr_iter_op_t {
 H5_DLL struct H5O_loc_t *H5A_oloc(H5A_t *attr);
 H5_DLL H5G_name_t *H5A_nameof(H5A_t *attr);
 H5_DLL H5T_t *H5A_type(const H5A_t *attr);
-H5_DLL H5T_t *H5A_get_type(H5A_t *attr);
-H5_DLL H5S_t *H5A_get_space(H5A_t *attr);
+H5_DLL hid_t H5A_get_space(H5A_t *attr);
 H5_DLL herr_t H5O_attr_iterate_real(hid_t loc_id, const H5O_loc_t *loc,
-    hid_t dxpl_id, H5_index_t idx_type, H5_iter_order_t order, hsize_t skip,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t skip,
     hsize_t *last_attr, const H5A_attr_iter_op_t *attr_op, void *op_data);
-H5_DLL herr_t H5O_attr_iterate(hid_t loc_id, hid_t dxpl_id, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t skip, hsize_t *last_attr,
-    const H5A_attr_iter_op_t *op, void *op_data);
 
 #endif /* _H5Aprivate_H */
 
diff --git a/src/H5Apublic.h b/src/H5Apublic.h
index 99ca90e..586940b 100644
--- a/src/H5Apublic.h
+++ b/src/H5Apublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Atest.c b/src/H5Atest.c
index 3dcca87..31fbe8e 100644
--- a/src/H5Atest.c
+++ b/src/H5Atest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -38,6 +36,7 @@
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5Apkg.h"		/* Attributes	  			*/
 #include "H5ACprivate.h"	/* Metadata cache			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5SMprivate.h"        /* Shared object header messages        */
@@ -79,7 +78,7 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_is_shared_test
+ * Function:	H5A__is_shared_test
  *
  * Purpose:     Check if an attribute is shared
  *
@@ -92,12 +91,12 @@
  *-------------------------------------------------------------------------
  */
 htri_t
-H5A_is_shared_test(hid_t attr_id)
+H5A__is_shared_test(hid_t attr_id)
 {
     H5A_t	*attr;                  /* Attribute object for ID */
     htri_t	ret_value = FAIL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
@@ -108,11 +107,11 @@ H5A_is_shared_test(hid_t attr_id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_is_shared_test() */
+} /* end H5A__is_shared_test() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5A_get_shared_rc_test
+ * Function:	H5A__get_shared_rc_test
  *
  * Purpose:     Retrieve the refcount for a shared attribute
  *
@@ -125,26 +124,34 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5A_get_shared_rc_test(hid_t attr_id, hsize_t *ref_count)
+H5A__get_shared_rc_test(hid_t attr_id, hsize_t *ref_count)
 {
     H5A_t	*attr;                  /* Attribute object for ID */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     if(NULL == (attr = (H5A_t *)H5I_object_verify(attr_id, H5I_ATTR)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an attribute")
 
+    /* Push API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Sanity check */
     HDassert(H5O_msg_is_shared(H5O_ATTR_ID, attr));
 
     /* Retrieve ref count for shared or shareable attribute */
-    if(H5SM_get_refcount(attr->oloc.file, H5AC_ind_read_dxpl_id, H5O_ATTR_ID,
-            &attr->sh_loc, ref_count) < 0)
+    if(H5SM_get_refcount(attr->oloc.file, H5O_ATTR_ID, &attr->sh_loc, ref_count) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve shared message ref count")
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_ATTR, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5A_get_shared_rc_test() */
+} /* end H5A__get_shared_rc_test() */
 
diff --git a/src/H5B.c b/src/H5B.c
index 2c49c81..fe09b42 100644
--- a/src/H5B.c
+++ b/src/H5B.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -105,7 +103,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5Bpkg.h"		/* B-link trees				*/
-#include "H5Dprivate.h"		/* Datasets				*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5MFprivate.h"	/* File memory management		*/
@@ -145,20 +143,15 @@ typedef struct H5B_ins_ud_t {
 /********************/
 /* Local Prototypes */
 /********************/
-static H5B_ins_t H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
-				   const H5B_class_t *type,
-				   uint8_t *lt_key,
-				   hbool_t *lt_key_changed,
-				   uint8_t *md_key, void *udata,
-				   uint8_t *rt_key,
-				   hbool_t *rt_key_changed,
-				   H5B_ins_ud_t *split_bt_ud/*out*/);
+static H5B_ins_t H5B__insert_helper(H5F_t *f, H5B_ins_ud_t *bt_ud,
+    const H5B_class_t *type, uint8_t *lt_key, hbool_t *lt_key_changed,
+    uint8_t *md_key, void *udata, uint8_t *rt_key, hbool_t *rt_key_changed,
+    H5B_ins_ud_t *split_bt_ud/*out*/);
 static herr_t H5B__insert_child(H5B_t *bt, unsigned *bt_flags,
                                unsigned idx, haddr_t child,
 			       H5B_ins_t anchor, const void *md_key);
-static herr_t H5B__split(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
-                        unsigned idx, void *udata,
-                        H5B_ins_ud_t *split_bt_ud/*out*/);
+static herr_t H5B__split(H5F_t *f, H5B_ins_ud_t *bt_ud, unsigned idx,
+    void *udata, H5B_ins_ud_t *split_bt_ud/*out*/);
 static H5B_t * H5B__copy(const H5B_t *old_bt);
 
 
@@ -218,8 +211,7 @@ H5FL_SEQ_DEFINE_STATIC(size_t);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B_create(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, void *udata,
-	   haddr_t *addr_p/*out*/)
+H5B_create(H5F_t *f, const H5B_class_t *type, void *udata, haddr_t *addr_p/*out*/)
 {
     H5B_t		*bt = NULL;
     H5B_shared_t        *shared=NULL;        /* Pointer to shared B-tree info */
@@ -252,23 +244,23 @@ H5B_create(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, void *udata,
     if(NULL == (bt->native = H5FL_BLK_MALLOC(native_block, shared->sizeof_keys)) ||
             NULL == (bt->child = H5FL_SEQ_MALLOC(haddr_t, (size_t)shared->two_k)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for B-tree root node")
-    if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)shared->sizeof_rnode)))
+    if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_BTREE, (hsize_t)shared->sizeof_rnode)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "file allocation failed for B-tree root node")
 
     /*
      * Cache the new B-tree node.
      */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_BT, *addr_p, bt, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_BT, *addr_p, bt, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't add B-tree root node to cache")
 #ifdef H5B_DEBUG
-    H5B__assert(f, dxpl_id, *addr_p, shared->type, udata);
+    H5B__assert(f, *addr_p, shared->type, udata);
 #endif
 
 done:
     if(ret_value < 0) {
         if(shared && shared->sizeof_rnode>0) {
             H5_CHECK_OVERFLOW(shared->sizeof_rnode,size_t,hsize_t);
-            (void)H5MF_xfree(f, H5FD_MEM_BTREE, dxpl_id, *addr_p, (hsize_t)shared->sizeof_rnode);
+            (void)H5MF_xfree(f, H5FD_MEM_BTREE, *addr_p, (hsize_t)shared->sizeof_rnode);
         } /* end if */
 	if(bt)
             /* Destroy B-tree node */
@@ -304,7 +296,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5B_find(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void *udata)
+H5B_find(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata)
 {
     H5B_t	*bt = NULL;
     H5UC_t	*rc_shared;             /* Ref-counted shared info */
@@ -339,7 +331,7 @@ H5B_find(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void *u
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree node")
 
     rt = bt->nchildren;
@@ -361,16 +353,16 @@ H5B_find(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void *u
     HDassert(idx < bt->nchildren);
 
     if(bt->level > 0) {
-	if((ret_value = H5B_find(f, dxpl_id, type, bt->child[idx], udata)) < 0)
+	if((ret_value = H5B_find(f, type, bt->child[idx], udata)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "can't lookup key in subtree")
     } /* end if */
     else {
-	if((ret_value = (type->found)(f, dxpl_id, bt->child[idx], H5B_NKEY(bt, shared, idx), udata)) < 0)
+	if((ret_value = (type->found)(f, bt->child[idx], H5B_NKEY(bt, shared, idx), udata)) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "can't lookup key in leaf node")
     } /* end else */
 
 done:
-    if(bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+    if(bt && H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -400,10 +392,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5B__split(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud, unsigned idx,
+H5B__split(H5F_t *f, H5B_ins_ud_t *bt_ud, unsigned idx,
     void *udata, H5B_ins_ud_t *split_bt_ud/*out*/)
 {
-    H5P_genplist_t *dx_plist;           /* Data transfer property list */
     H5B_shared_t  *shared;              /* Pointer to shared B-tree info */
     H5B_cache_ud_t cache_udata;         /* User-data for metadata cache callback */
     unsigned	nleft, nright;          /* Number of keys in left & right halves */
@@ -429,12 +420,8 @@ H5B__split(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud, unsigned idx,
     HDassert(shared);
     HDassert(bt_ud->bt->nchildren == shared->two_k);
 
-    /* Get the dataset transfer property list */
-    if(NULL == (dx_plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_BTREE, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
     /* Get B-tree split ratios */
-    if(H5P_get(dx_plist, H5D_XFER_BTREE_SPLIT_RATIO_NAME, &split_ratios[0]) < 0)
+    if(H5CX_get_btree_split_ratios(split_ratios) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTGET, FAIL, "can't retrieve B-tree split ratios")
 
 #ifdef H5B_DEBUG
@@ -483,12 +470,12 @@ H5B__split(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud, unsigned idx,
     /*
      * Create the new B-tree node.
      */
-    if(H5B_create(f, dxpl_id, shared->type, udata, &split_bt_ud->addr/*out*/) < 0)
+    if(H5B_create(f, shared->type, udata, &split_bt_ud->addr/*out*/) < 0)
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create B-tree")
     cache_udata.f = f;
     cache_udata.type = shared->type;
     cache_udata.rc_shared = bt_ud->bt->rc_shared;
-    if(NULL == (split_bt_ud->bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, split_bt_ud->addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (split_bt_ud->bt = (H5B_t *)H5AC_protect(f, H5AC_BT, split_bt_ud->addr, &cache_udata, H5AC__NO_FLAGS_SET)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree")
     split_bt_ud->bt->level = bt_ud->bt->level;
 
@@ -521,12 +508,12 @@ H5B__split(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud, unsigned idx,
     if(H5F_addr_defined(bt_ud->bt->right)) {
         H5B_t   *tmp_bt;
 
-        if(NULL == (tmp_bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, bt_ud->bt->right, &cache_udata, H5AC__NO_FLAGS_SET)))
+        if(NULL == (tmp_bt = (H5B_t *)H5AC_protect(f, H5AC_BT, bt_ud->bt->right, &cache_udata, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load right sibling")
 
         tmp_bt->left = split_bt_ud->addr;
 
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, bt_ud->bt->right, tmp_bt, H5AC__DIRTIED_FLAG) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, bt_ud->bt->right, tmp_bt, H5AC__DIRTIED_FLAG) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
     } /* end if */
 
@@ -535,7 +522,7 @@ H5B__split(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud, unsigned idx,
 
 done:
     if(ret_value < 0) {
-        if(split_bt_ud->bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, split_bt_ud->addr, split_bt_ud->bt, split_bt_ud->cache_flags) < 0)
+        if(split_bt_ud->bt && H5AC_unprotect(f, H5AC_BT, split_bt_ud->addr, split_bt_ud->bt, split_bt_ud->cache_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
         split_bt_ud->bt = NULL;
         split_bt_ud->addr = HADDR_UNDEF;
@@ -560,7 +547,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B_insert(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void *udata)
+H5B_insert(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata)
 {
     /*
      * These are defined this way to satisfy alignment constraints.
@@ -601,11 +588,11 @@ H5B_insert(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
     bt_ud.addr = addr;
-    if(NULL == (bt_ud.bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (bt_ud.bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to locate root of B-tree")
 
     /* Insert the object */
-    if((int)(my_ins = H5B__insert_helper(f, dxpl_id, &bt_ud, type, lt_key,
+    if((int)(my_ins = H5B__insert_helper(f, &bt_ud, type, lt_key,
             &lt_key_changed, md_key, udata, rt_key, &rt_key_changed,
             &split_bt_ud/*out*/)) < 0)
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to insert key")
@@ -635,7 +622,7 @@ H5B_insert(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void
      * "moving".
      */
     H5_CHECK_OVERFLOW(shared->sizeof_rnode,size_t,hsize_t);
-    if(HADDR_UNDEF == (old_root_addr = H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)shared->sizeof_rnode)))
+    if(HADDR_UNDEF == (old_root_addr = H5MF_alloc(f, H5FD_MEM_BTREE, (hsize_t)shared->sizeof_rnode)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "unable to allocate file space to move root")
 
     /*
@@ -648,12 +635,12 @@ H5B_insert(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void
 
     /* Unprotect the old root so we can move it.  Also force it to be marked
      * dirty so it is written to the new location. */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_BT, bt_ud.addr, bt_ud.bt, H5AC__DIRTIED_FLAG) < 0)
+    if(H5AC_unprotect(f, H5AC_BT, bt_ud.addr, bt_ud.bt, H5AC__DIRTIED_FLAG) < 0)
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release old root")
     bt_ud.bt = NULL;  /* Make certain future references will be caught */
 
     /* Move the location of the old root on the disk */
-    if(H5AC_move_entry(f, H5AC_BT, bt_ud.addr, old_root_addr, dxpl_id) < 0)
+    if(H5AC_move_entry(f, H5AC_BT, bt_ud.addr, old_root_addr) < 0)
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to move B-tree root node")
     bt_ud.addr = old_root_addr;
 
@@ -677,7 +664,7 @@ H5B_insert(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void
     HDmemcpy(H5B_NKEY(new_root_bt, shared, 2), rt_key, shared->type->sizeof_nkey);
 
     /* Insert the modified copy of the old root into the file again */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_BT, addr, new_root_bt, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_BT, addr, new_root_bt, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTFLUSH, FAIL, "unable to add old B-tree root node to cache")
 
 done:
@@ -686,16 +673,16 @@ done:
             HDONE_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "unable to free B-tree root node");
 
     if(bt_ud.bt)
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, bt_ud.addr, bt_ud.bt, bt_ud.cache_flags) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, bt_ud.addr, bt_ud.bt, bt_ud.cache_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to unprotect old root")
 
     if(split_bt_ud.bt)
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, split_bt_ud.addr, split_bt_ud.bt, split_bt_ud.cache_flags) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, split_bt_ud.addr, split_bt_ud.bt, split_bt_ud.cache_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to unprotect new child")
 
 #ifdef H5B_DEBUG
     if(ret_value >= 0)
-        H5B__assert(f, dxpl_id, addr, type, udata);
+        H5B__assert(f, addr, type, udata);
 #endif
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -807,12 +794,9 @@ H5B__insert_child(H5B_t *bt, unsigned *bt_flags, unsigned idx,
  *-------------------------------------------------------------------------
  */
 static H5B_ins_t
-H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
-                  const H5B_class_t *type,
-                  uint8_t *lt_key, hbool_t *lt_key_changed,
-                  uint8_t *md_key, void *udata,
-		  uint8_t *rt_key, hbool_t *rt_key_changed,
-		  H5B_ins_ud_t *split_bt_ud/*out*/)
+H5B__insert_helper(H5F_t *f, H5B_ins_ud_t *bt_ud, const H5B_class_t *type,
+    uint8_t *lt_key, hbool_t *lt_key_changed, uint8_t *md_key, void *udata,
+    uint8_t *rt_key, hbool_t *rt_key_changed, H5B_ins_ud_t *split_bt_ud/*out*/)
 {
     H5B_t       *bt;                    /* Convenience pointer to B-tree */
     H5UC_t	*rc_shared;             /* Ref-counted shared info */
@@ -884,7 +868,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
 	 * must necessarily be at level zero.
 	 */
 	HDassert(0 == bt->level);
-	if((type->new_node)(f, dxpl_id, H5B_INS_FIRST, H5B_NKEY(bt, shared, 0), udata,
+	if((type->new_node)(f, H5B_INS_FIRST, H5B_NKEY(bt, shared, 0), udata,
 			     H5B_NKEY(bt, shared, 1), bt->child + 0/*out*/) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, H5B_INS_ERROR, "unable to create leaf node")
 	bt->nchildren = 1;
@@ -892,7 +876,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
 	idx = 0;
 
 	if(type->follow_min) {
-	    if((int)(my_ins = (type->insert)(f, dxpl_id, bt->child[idx], H5B_NKEY(bt, shared, idx),
+	    if((int)(my_ins = (type->insert)(f, bt->child[idx], H5B_NKEY(bt, shared, idx),
                      lt_key_changed, md_key, udata, H5B_NKEY(bt, shared, idx + 1),
                      rt_key_changed, &new_child_bt_ud.addr/*out*/)) < 0)
 		HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "unable to insert first leaf node")
@@ -906,10 +890,10 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
              * Follow the minimum branch out of this node to a subtree.
              */
             child_bt_ud.addr = bt->child[idx];
-            if(NULL == (child_bt_ud.bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, child_bt_ud.addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+            if(NULL == (child_bt_ud.bt = (H5B_t *)H5AC_protect(f, H5AC_BT, child_bt_ud.addr, &cache_udata, H5AC__NO_FLAGS_SET)))
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to load node")
 
-            if((int)(my_ins = H5B__insert_helper(f, dxpl_id, &child_bt_ud, type,
+            if((int)(my_ins = H5B__insert_helper(f, &child_bt_ud, type,
                     H5B_NKEY(bt,shared,idx), lt_key_changed, md_key,
                     udata, H5B_NKEY(bt, shared, idx + 1), rt_key_changed,
                     &new_child_bt_ud/*out*/)) < 0)
@@ -920,7 +904,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
              * current node.  Follow the minimum branch to a leaf node and let
              * the subclass handle the problem.
              */
-            if((int)(my_ins = (type->insert)(f, dxpl_id, bt->child[idx], H5B_NKEY(bt, shared, idx),
+            if((int)(my_ins = (type->insert)(f, bt->child[idx], H5B_NKEY(bt, shared, idx),
                     lt_key_changed, md_key, udata, H5B_NKEY(bt, shared, idx + 1),
                     rt_key_changed, &new_child_bt_ud.addr/*out*/)) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert minimum leaf node")
@@ -932,7 +916,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
              */
             my_ins = H5B_INS_LEFT;
             HDmemcpy(md_key, H5B_NKEY(bt,shared,idx), type->sizeof_nkey);
-            if((type->new_node)(f, dxpl_id, H5B_INS_LEFT, H5B_NKEY(bt, shared, idx), udata,
+            if((type->new_node)(f, H5B_INS_LEFT, H5B_NKEY(bt, shared, idx), udata,
                     md_key, &new_child_bt_ud.addr/*out*/) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert minimum leaf node")
             *lt_key_changed = TRUE;
@@ -952,10 +936,10 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
             */
             idx = bt->nchildren - 1;
             child_bt_ud.addr = bt->child[idx];
-            if(NULL == (child_bt_ud.bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, child_bt_ud.addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+            if(NULL == (child_bt_ud.bt = (H5B_t *)H5AC_protect(f, H5AC_BT, child_bt_ud.addr, &cache_udata, H5AC__NO_FLAGS_SET)))
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to load node")
 
-            if((int)(my_ins = H5B__insert_helper(f, dxpl_id, &child_bt_ud, type,
+            if((int)(my_ins = H5B__insert_helper(f, &child_bt_ud, type,
                     H5B_NKEY(bt, shared, idx), lt_key_changed, md_key, udata,
                     H5B_NKEY(bt, shared, idx + 1), rt_key_changed,
                     &new_child_bt_ud/*out*/)) < 0)
@@ -967,7 +951,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
              * the subclass handle the problem.
              */
             idx = bt->nchildren - 1;
-            if((int)(my_ins = (type->insert)(f, dxpl_id, bt->child[idx], H5B_NKEY(bt, shared, idx),
+            if((int)(my_ins = (type->insert)(f, bt->child[idx], H5B_NKEY(bt, shared, idx),
                     lt_key_changed, md_key, udata, H5B_NKEY(bt, shared, idx + 1),
                     rt_key_changed, &new_child_bt_ud.addr/*out*/)) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert maximum leaf node")
@@ -980,7 +964,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
             idx = bt->nchildren - 1;
             my_ins = H5B_INS_RIGHT;
             HDmemcpy(md_key, H5B_NKEY(bt, shared, idx + 1), type->sizeof_nkey);
-            if((type->new_node)(f, dxpl_id, H5B_INS_RIGHT, md_key, udata,
+            if((type->new_node)(f, H5B_INS_RIGHT, md_key, udata,
                     H5B_NKEY(bt, shared, idx + 1), &new_child_bt_ud.addr/*out*/) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert maximum leaf node")
             *rt_key_changed = TRUE;
@@ -1007,10 +991,10 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
 	 */
 	HDassert(idx < bt->nchildren);
 	child_bt_ud.addr = bt->child[idx];
-        if(NULL == (child_bt_ud.bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, child_bt_ud.addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+        if(NULL == (child_bt_ud.bt = (H5B_t *)H5AC_protect(f, H5AC_BT, child_bt_ud.addr, &cache_udata, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to load node")
 
-	if((int)(my_ins = H5B__insert_helper(f, dxpl_id, &child_bt_ud, type,
+	if((int)(my_ins = H5B__insert_helper(f, &child_bt_ud, type,
                 H5B_NKEY(bt, shared, idx), lt_key_changed, md_key, udata,
                 H5B_NKEY(bt, shared, idx + 1), rt_key_changed, &new_child_bt_ud/*out*/)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert subtree")
@@ -1019,7 +1003,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
 	 * Follow a branch out of this node to a leaf node of some other type.
 	 */
 	HDassert(idx < bt->nchildren);
-	if((int)(my_ins = (type->insert)(f, dxpl_id, bt->child[idx], H5B_NKEY(bt, shared, idx),
+	if((int)(my_ins = (type->insert)(f, bt->child[idx], H5B_NKEY(bt, shared, idx),
                   lt_key_changed, md_key, udata, H5B_NKEY(bt, shared, idx + 1),
                   rt_key_changed, &new_child_bt_ud.addr/*out*/)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert leaf node")
@@ -1070,7 +1054,7 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
 	 * If this node is full then split it before inserting the new child.
 	 */
 	if(bt->nchildren == shared->two_k) {
-	    if(H5B__split(f, dxpl_id, bt_ud, idx, udata, split_bt_ud/*out*/) < 0)
+	    if(H5B__split(f, bt_ud, idx, udata, split_bt_ud/*out*/) < 0)
 		HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, H5B_INS_ERROR, "unable to split node")
 	    if(idx < bt->nchildren) {
 		tmp_bt = bt;
@@ -1113,11 +1097,11 @@ H5B__insert_helper(H5F_t *f, hid_t dxpl_id, H5B_ins_ud_t *bt_ud,
 
 done:
     if(child_bt_ud.bt)
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, child_bt_ud.addr, child_bt_ud.bt, child_bt_ud.cache_flags) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, child_bt_ud.addr, child_bt_ud.bt, child_bt_ud.cache_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to unprotect child")
 
     if(new_child_bt_ud.bt)
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, new_child_bt_ud.addr, new_child_bt_ud.bt, new_child_bt_ud.cache_flags) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, new_child_bt_ud.addr, new_child_bt_ud.bt, new_child_bt_ud.cache_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to unprotect new child")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1139,7 +1123,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5B__iterate_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
+H5B__iterate_helper(H5F_t *f, const H5B_class_t *type, haddr_t addr,
     H5B_operator_t op, void *udata)
 {
     H5B_t               *bt = NULL;     /* Pointer to current B-tree node */
@@ -1170,21 +1154,21 @@ H5B__iterate_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t ad
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5_ITER_ERROR, "unable to load B-tree node")
 
     /* Iterate over node's children */
     for(u = 0; u < bt->nchildren && ret_value == H5_ITER_CONT; u++) {
         if(bt->level > 0)
-            ret_value = H5B__iterate_helper(f, dxpl_id, type, bt->child[u], op, udata);
+            ret_value = H5B__iterate_helper(f, type, bt->child[u], op, udata);
         else
-            ret_value = (*op)(f, dxpl_id, H5B_NKEY(bt, shared, u), bt->child[u], H5B_NKEY(bt, shared, u + 1), udata);
+            ret_value = (*op)(f, H5B_NKEY(bt, shared, u), bt->child[u], H5B_NKEY(bt, shared, u + 1), udata);
         if(ret_value < 0)
             HERROR(H5E_BTREE, H5E_BADITER, "B-tree iteration failed");
     } /* end for */
 
 done:
-    if(bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+    if(bt && H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5_ITER_ERROR, "unable to release B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1206,7 +1190,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B_iterate(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
+H5B_iterate(H5F_t *f, const H5B_class_t *type, haddr_t addr,
     H5B_operator_t op, void *udata)
 {
     herr_t ret_value = FAIL;            /* Return value */
@@ -1223,7 +1207,7 @@ H5B_iterate(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
     HDassert(udata);
 
     /* Iterate over the B-tree records */
-    if((ret_value = H5B__iterate_helper(f, dxpl_id, type, addr, op, udata)) < 0)
+    if((ret_value = H5B__iterate_helper(f, type, addr, op, udata)) < 0)
         HERROR(H5E_BTREE, H5E_BADITER, "B-tree iteration failed");
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1255,10 +1239,9 @@ H5B_iterate(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
  *-------------------------------------------------------------------------
  */
 static H5B_ins_t
-H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *type,
-		  int level, uint8_t *lt_key/*out*/,
-		  hbool_t *lt_key_changed/*out*/, void *udata,
-		  uint8_t *rt_key/*out*/, hbool_t *rt_key_changed/*out*/)
+H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
+    uint8_t *lt_key/*out*/, hbool_t *lt_key_changed/*out*/, void *udata,
+    uint8_t *rt_key/*out*/, hbool_t *rt_key_changed/*out*/)
 {
     H5B_t	*bt = NULL, *sibling = NULL;
     unsigned	bt_flags = H5AC__NO_FLAGS_SET;
@@ -1293,7 +1276,7 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__NO_FLAGS_SET)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to load B-tree node")
 
     rt = bt->nchildren;
@@ -1314,9 +1297,9 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
     HDassert(idx < bt->nchildren);
     if(bt->level > 0) {
 	/* We're at an internal node -- call recursively */
-	if((int)(ret_value = H5B__remove_helper(f, dxpl_id,
-                 bt->child[idx], type, level + 1, H5B_NKEY(bt, shared, idx)/*out*/,
-                 lt_key_changed/*out*/, udata, H5B_NKEY(bt, shared, idx + 1)/*out*/,
+	if((int)(ret_value = H5B__remove_helper(f, bt->child[idx], type,
+                level + 1, H5B_NKEY(bt, shared, idx)/*out*/,
+                lt_key_changed/*out*/, udata, H5B_NKEY(bt, shared, idx + 1)/*out*/,
                  rt_key_changed/*out*/)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, H5B_INS_ERROR, "key not found in subtree")
     } else if(type->remove) {
@@ -1325,9 +1308,9 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
 	 * has a removal method.  Pass the removal request to the pointed-to
 	 * object and let it decide how to progress.
 	 */
-	if((int)(ret_value = (type->remove)(f, dxpl_id,
-                  bt->child[idx], H5B_NKEY(bt, shared, idx), lt_key_changed, udata,
-                  H5B_NKEY(bt, shared, idx + 1), rt_key_changed)) < 0)
+	if((int)(ret_value = (type->remove)(f, bt->child[idx],
+                H5B_NKEY(bt, shared, idx), lt_key_changed, udata,
+                H5B_NKEY(bt, shared, idx + 1), rt_key_changed)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, H5B_INS_ERROR, "key not found in leaf node")
     } else {
 	/*
@@ -1393,7 +1376,7 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
                  * "critical" for any child in its node to maintain this
                  * consistency (and avoid breaking key/child consistency) */
                 if(H5F_addr_defined(bt->left)) {
-                    if(NULL == (sibling = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, bt->left, &cache_udata, H5AC__NO_FLAGS_SET)))
+                    if(NULL == (sibling = (H5B_t *)H5AC_protect(f, H5AC_BT, bt->left, &cache_udata, H5AC__NO_FLAGS_SET)))
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to load node from tree")
 
                     /* Copy right-most key from deleted node to right-most key
@@ -1405,12 +1388,12 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
 
                     sibling->right = bt->right;
 
-                    if(H5AC_unprotect(f, dxpl_id, H5AC_BT, bt->left, sibling, H5AC__DIRTIED_FLAG) < 0)
+                    if(H5AC_unprotect(f, H5AC_BT, bt->left, sibling, H5AC__DIRTIED_FLAG) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release node from tree")
                     sibling = NULL;   /* Make certain future references will be caught */
                 } /* end if */
                 if(H5F_addr_defined(bt->right)) {
-                    if(NULL == (sibling = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, bt->right, &cache_udata, H5AC__NO_FLAGS_SET)))
+                    if(NULL == (sibling = (H5B_t *)H5AC_protect(f, H5AC_BT, bt->right, &cache_udata, H5AC__NO_FLAGS_SET)))
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to unlink node from tree")
 
                     /* Copy left-most key from deleted node to left-most key in
@@ -1422,7 +1405,7 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
 
                     sibling->left = bt->left;
 
-                    if(H5AC_unprotect(f, dxpl_id, H5AC_BT, bt->right, sibling, H5AC__DIRTIED_FLAG) < 0)
+                    if(H5AC_unprotect(f, H5AC_BT, bt->right, sibling, H5AC__DIRTIED_FLAG) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release node from tree")
                     sibling = NULL;   /* Make certain future references will be caught */
                 } /* end if */
@@ -1435,7 +1418,7 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
                 /* Delete the node from disk (via the metadata cache) */
 		bt_flags |= H5AC__DIRTIED_FLAG | H5AC__FREE_FILE_SPACE_FLAG;
                 H5_CHECK_OVERFLOW(shared->sizeof_rnode, size_t, hsize_t);
-                if(H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, bt_flags | H5AC__DELETED_FLAG) < 0) {
+                if(H5AC_unprotect(f, H5AC_BT, addr, bt, bt_flags | H5AC__DELETED_FLAG) < 0) {
                     bt = NULL;
                     bt_flags = H5AC__NO_FLAGS_SET;
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to free B-tree node")
@@ -1530,13 +1513,13 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
         HDassert(level > 0);
 
         /* Update the rightmost key in the left sibling */
-        if(NULL == (sibling = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, bt->left, &cache_udata, H5AC__NO_FLAGS_SET)))
+        if(NULL == (sibling = (H5B_t *)H5AC_protect(f, H5AC_BT, bt->left, &cache_udata, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to protect node")
 
         HDmemcpy(H5B_NKEY(sibling, shared, sibling->nchildren),
                 H5B_NKEY(bt, shared, 0), type->sizeof_nkey);
 
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, bt->left, sibling, H5AC__DIRTIED_FLAG) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, bt->left, sibling, H5AC__DIRTIED_FLAG) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release node from tree")
         sibling = NULL;   /* Make certain future references will be caught */
     } /* end if */
@@ -1545,19 +1528,19 @@ H5B__remove_helper(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *typ
         HDassert(level > 0);
 
         /* Update the lefttmost key in the right sibling */
-        if(NULL == (sibling = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, bt->right, &cache_udata, H5AC__NO_FLAGS_SET)))
+        if(NULL == (sibling = (H5B_t *)H5AC_protect(f, H5AC_BT, bt->right, &cache_udata, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to protect node")
 
         HDmemcpy(H5B_NKEY(sibling, shared, 0),
                 H5B_NKEY(bt, shared, bt->nchildren), type->sizeof_nkey);
 
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, bt->right, sibling, H5AC__DIRTIED_FLAG) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, bt->right, sibling, H5AC__DIRTIED_FLAG) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release node from tree")
         sibling = NULL;   /* Make certain future references will be caught */
     } /* end else */
 
 done:
-    if(bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, bt_flags) < 0)
+    if(bt && H5AC_unprotect(f, H5AC_BT, addr, bt, bt_flags) < 0)
 	HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1581,7 +1564,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B_remove(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void *udata)
+H5B_remove(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata)
 {
     /* These are defined this way to satisfy alignment constraints */
     uint64_t	_lt_key[128], _rt_key[128];
@@ -1600,16 +1583,15 @@ H5B_remove(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void
     HDassert(H5F_addr_defined(addr));
 
     /* The actual removal */
-    if(H5B__remove_helper(f, dxpl_id, addr, type, 0, lt_key, &lt_key_changed,
-			  udata, rt_key, &rt_key_changed) == H5B_INS_ERROR)
+    if(H5B_INS_ERROR == H5B__remove_helper(f, addr, type, 0, lt_key, &lt_key_changed, udata, rt_key, &rt_key_changed))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to remove entry from B-tree")
 
 #ifdef H5B_DEBUG
-    H5B__assert(f, dxpl_id, addr, type, udata);
+    H5B__assert(f, addr, type, udata);
 #endif
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5B_remove() */
 
 
 /*-------------------------------------------------------------------------
@@ -1626,7 +1608,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B_delete(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void *udata)
+H5B_delete(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata)
 {
     H5B_t	*bt = NULL;             /* B-tree node being operated on */
     H5UC_t	*rc_shared;             /* Ref-counted shared info */
@@ -1652,14 +1634,14 @@ H5B_delete(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree node")
 
     /* Iterate over all children in tree, deleting them */
     if(bt->level > 0) {
         /* Iterate over all children in node, deleting them */
         for(u = 0; u < bt->nchildren; u++)
-            if(H5B_delete(f, dxpl_id, type, bt->child[u], udata) < 0)
+            if(H5B_delete(f, type, bt->child[u], udata) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTLIST, FAIL, "unable to delete B-tree node")
 
     } /* end if */
@@ -1671,16 +1653,16 @@ H5B_delete(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr, void
             /* Iterate over all entries in node, calling callback */
             for(u = 0; u < bt->nchildren; u++) {
                 /* Call user's callback for each entry */
-                if((type->remove)(f, dxpl_id,
-                          bt->child[u], H5B_NKEY(bt, shared, u), &lt_key_changed, udata,
-                          H5B_NKEY(bt, shared, u + 1), &rt_key_changed) < H5B_INS_NOOP)
+                if((type->remove)(f, bt->child[u], H5B_NKEY(bt, shared, u),
+                        &lt_key_changed, udata, H5B_NKEY(bt, shared, u + 1),
+                        &rt_key_changed) < H5B_INS_NOOP)
                     HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "can't remove B-tree node")
             } /* end for */
         } /* end if */
     } /* end else */
 
 done:
-    if(bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+    if(bt && H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node in cache")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1875,7 +1857,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5B__get_info_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
+H5B__get_info_helper(H5F_t *f, const H5B_class_t *type, haddr_t addr,
     const H5B_info_ud_t *info_udata)
 {
     H5B_t *bt = NULL;           /* Pointer to current B-tree node */
@@ -1913,7 +1895,7 @@ H5B__get_info_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t a
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree node")
 
     /* Cache information from this node */
@@ -1926,7 +1908,7 @@ H5B__get_info_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t a
     info_udata->bt_info->num_nodes++;
 
     /* Release current node */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
     bt = NULL;
 
@@ -1937,7 +1919,7 @@ H5B__get_info_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t a
     while(H5F_addr_defined(next_addr)) {
         /* Protect the next node to the right */
         addr = next_addr;
-        if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "B-tree node")
 
         /* Cache information from this node */
@@ -1948,7 +1930,7 @@ H5B__get_info_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t a
         info_udata->bt_info->num_nodes++;
 
         /* Unprotect node */
-        if(H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
         bt = NULL;
     } /* end while */
@@ -1956,12 +1938,12 @@ H5B__get_info_helper(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t a
     /* Check for another "row" of B-tree nodes to iterate over */
     if(level > 0) {
 	/* Keep following the left-most child until we reach a leaf node. */
-	if(H5B__get_info_helper(f, dxpl_id, type, left_child, info_udata) < 0)
+	if(H5B__get_info_helper(f, type, left_child, info_udata) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTLIST, FAIL, "unable to list B-tree node")
     } /* end if */
 
 done:
-    if(bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+    if(bt && H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1981,7 +1963,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B_get_info(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
+H5B_get_info(H5F_t *f, const H5B_class_t *type, haddr_t addr,
     H5B_info_t *bt_info, H5B_operator_t op, void *udata)
 {
     H5B_info_ud_t       info_udata;     /* User-data for B-tree size iteration */
@@ -2006,13 +1988,13 @@ H5B_get_info(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr,
     info_udata.udata = udata;
 
     /* Iterate over the B-tree nodes */
-    if(H5B__get_info_helper(f, dxpl_id, type, addr, &info_udata) < 0)
+    if(H5B__get_info_helper(f, type, addr, &info_udata) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_BADITER, FAIL, "B-tree iteration failed")
 
     /* Iterate over the B-tree records, making any "leaf" callbacks */
     /* (Only if operator defined) */
     if(op)
-        if((ret_value = H5B__iterate_helper(f, dxpl_id, type, addr, op, udata)) < 0)
+        if((ret_value = H5B__iterate_helper(f, type, addr, op, udata)) < 0)
             HERROR(H5E_BTREE, H5E_BADITER, "B-tree iteration failed");
 
 done:
@@ -2033,7 +2015,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5B_valid(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr)
+H5B_valid(H5F_t *f, const H5B_class_t *type, haddr_t addr)
 {
     H5B_t               *bt = NULL;             /* The B-tree */
     H5UC_t              *rc_shared;             /* Ref-counted shared info */
@@ -2064,12 +2046,12 @@ H5B_valid(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type, haddr_t addr)
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree node")
 
 done:
     /* Release the node */
-    if(bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+    if(bt && H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5B2.c b/src/H5B2.c
index e9f6150..1f964b8 100644
--- a/src/H5B2.c
+++ b/src/H5B2.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -137,7 +135,7 @@ H5FL_DEFINE_STATIC(H5B2_t);
  *-------------------------------------------------------------------------
  */
 H5B2_t *
-H5B2_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam, void *ctx_udata)
+H5B2_create(H5F_t *f, const H5B2_create_t *cparam, void *ctx_udata)
 {
     H5B2_t      *bt2 = NULL;            /* Pointer to the B-tree */
     H5B2_hdr_t  *hdr = NULL;            /* Pointer to the B-tree header */
@@ -156,7 +154,7 @@ H5B2_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam, void *ctx_udat
     HDcompile_assert(H5B2_NUM_BTREE_ID == NELMTS(H5B2_client_class_g));
 
     /* Create shared v2 B-tree header */
-    if(HADDR_UNDEF == (hdr_addr = H5B2__hdr_create(f, dxpl_id, cparam, ctx_udata)))
+    if(HADDR_UNDEF == (hdr_addr = H5B2__hdr_create(f, cparam, ctx_udata)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, NULL, "can't create v2 B-tree header")
 
     /* Create v2 B-tree wrapper */
@@ -164,7 +162,7 @@ H5B2_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam, void *ctx_udat
         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, NULL, "memory allocation failed for v2 B-tree info")
 
     /* Look up the B-tree header */
-    if(NULL == (hdr = H5B2__hdr_protect(f, dxpl_id, hdr_addr, ctx_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (hdr = H5B2__hdr_protect(f, hdr_addr, ctx_udata, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, NULL, "unable to protect v2 B-tree header")
 
     /* Point v2 B-tree wrapper at header and bump it's ref count */
@@ -183,10 +181,10 @@ H5B2_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam, void *ctx_udat
     ret_value = bt2;
 
 done:
-    if(hdr && H5B2__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5B2__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, NULL, "unable to release v2 B-tree header")
     if(!ret_value && bt2)
-        if(H5B2_close(bt2, dxpl_id) < 0)
+        if(H5B2_close(bt2) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTCLOSEOBJ, NULL, "unable to close v2 B-tree")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -208,7 +206,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5B2_t *
-H5B2_open(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *ctx_udata)
+H5B2_open(H5F_t *f, haddr_t addr, void *ctx_udata)
 {
     H5B2_t	*bt2 = NULL;            /* Pointer to the B-tree */
     H5B2_hdr_t	*hdr = NULL;            /* Pointer to the B-tree header */
@@ -221,7 +219,7 @@ H5B2_open(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *ctx_udata)
     HDassert(H5F_addr_defined(addr));
 
     /* Look up the B-tree header */
-    if(NULL == (hdr = H5B2__hdr_protect(f, dxpl_id, addr, ctx_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5B2__hdr_protect(f, addr, ctx_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, NULL, "unable to protect v2 B-tree header")
 
     /* Check for pending heap deletion */
@@ -248,10 +246,10 @@ H5B2_open(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *ctx_udata)
     ret_value = bt2;
 
 done:
-    if(hdr && H5B2__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5B2__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, NULL, "unable to release v2 B-tree header")
     if(!ret_value && bt2)
-        if(H5B2_close(bt2, dxpl_id) < 0)
+        if(H5B2_close(bt2) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTCLOSEOBJ, NULL, "unable to close v2 B-tree")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -272,7 +270,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_insert(H5B2_t *bt2, hid_t dxpl_id, void *udata)
+H5B2_insert(H5B2_t *bt2, void *udata)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
     herr_t	ret_value = SUCCEED;    /* Return value */
@@ -290,7 +288,7 @@ H5B2_insert(H5B2_t *bt2, hid_t dxpl_id, void *udata)
     hdr = bt2->hdr;
 
     /* Insert the record */
-    if(H5B2__insert(hdr, dxpl_id, udata) < 0)
+    if(H5B2__insert(hdr, udata) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into B-tree")
 
 done:
@@ -315,7 +313,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_update(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op, void *op_data)
+H5B2_update(H5B2_t *bt2, void *udata, H5B2_modify_t op, void *op_data)
 {
     H5B2_hdr_t	*hdr;           /* Pointer to the B-tree header */
     H5B2_update_status_t status = H5B2_UPDATE_UNKNOWN;   /* Whether the record was inserted/modified */
@@ -336,17 +334,17 @@ H5B2_update(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op, void *op_
     /* Check if the root node is allocated yet */
     if(!H5F_addr_defined(hdr->root.addr)) {
         /* Create root node as leaf node in B-tree */
-        if(H5B2__create_leaf(hdr, dxpl_id, hdr, &(hdr->root)) < 0)
+        if(H5B2__create_leaf(hdr, hdr, &(hdr->root)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create root node")
     } /* end if */
 
     /* Attempt to insert record into B-tree */
     if(hdr->depth > 0) {
-        if(H5B2__update_internal(hdr, dxpl_id, hdr->depth, NULL, &hdr->root, &status, H5B2_POS_ROOT, hdr, udata, op, op_data) < 0)
+        if(H5B2__update_internal(hdr, hdr->depth, NULL, &hdr->root, &status, H5B2_POS_ROOT, hdr, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update record in B-tree internal node")
     } /* end if */
     else {
-        if(H5B2__update_leaf(hdr, dxpl_id, &hdr->root, &status, H5B2_POS_ROOT, hdr, udata, op, op_data) < 0)
+        if(H5B2__update_leaf(hdr, &hdr->root, &status, H5B2_POS_ROOT, hdr, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update record in B-tree leaf node")
     } /* end else */
 
@@ -355,7 +353,7 @@ H5B2_update(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op, void *op_
 
     /* Use insert algorithm if nodes to leaf full */
     if(H5B2_UPDATE_INSERT_CHILD_FULL == status) {
-        if(H5B2__insert(hdr, dxpl_id, udata) < 0)
+        if(H5B2__insert(hdr, udata) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into B-tree")
     } /* end if */
     else if(H5B2_UPDATE_SHADOW_DONE == status || H5B2_UPDATE_INSERT_DONE == status) {
@@ -422,7 +420,7 @@ H5B2_get_addr(const H5B2_t *bt2, haddr_t *addr_p)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_iterate(H5B2_t *bt2, hid_t dxpl_id, H5B2_operator_t op, void *op_data)
+H5B2_iterate(H5B2_t *bt2, H5B2_operator_t op, void *op_data)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
     herr_t	ret_value = SUCCEED;    /* Return value */
@@ -440,11 +438,10 @@ H5B2_iterate(H5B2_t *bt2, hid_t dxpl_id, H5B2_operator_t op, void *op_data)
     hdr = bt2->hdr;
 
     /* Iterate through records */
-    if(hdr->root.node_nrec > 0) {
+    if(hdr->root.node_nrec > 0)
         /* Iterate through nodes */
-        if((ret_value = H5B2__iterate_node(hdr, dxpl_id, hdr->depth, &hdr->root, hdr, op, op_data)) < 0)
+        if((ret_value = H5B2__iterate_node(hdr, hdr->depth, &hdr->root, hdr, op, op_data)) < 0)
             HERROR(H5E_BTREE, H5E_CANTLIST, "node iteration failed");
-    } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* H5B2_iterate() */
@@ -474,8 +471,7 @@ H5B2_iterate(H5B2_t *bt2, hid_t dxpl_id, H5B2_operator_t op, void *op_data)
  *-------------------------------------------------------------------------
  */
 htri_t
-H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
-    void *op_data)
+H5B2_find(H5B2_t *bt2, void *udata, H5B2_found_t op, void *op_data)
 {
     H5B2_hdr_t  *hdr;                   /* Pointer to the B-tree header */
     H5B2_node_ptr_t curr_node_ptr;      /* Node pointer info for current node */
@@ -545,7 +541,7 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
         H5B2_node_ptr_t next_node_ptr;      /* Node pointer info for next node */
 
         /* Lock B-tree current node */
-        if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, &curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (internal = H5B2__protect_internal(hdr, parent, &curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree internal node")
 
         /* Unpin parent if necessary */
@@ -558,7 +554,7 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
         /* Locate node pointer for child */
         if(H5B2__locate_record(hdr->cls, internal->nrec, hdr->nat_off, internal->int_native, udata, &idx, &cmp) < 0) {
             /* Unlock current node before failing */
-            H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET);
+            H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET);
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
         } /* end if */
 
@@ -587,7 +583,7 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
             } /* end if */
 
             /* Unlock current node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             /* Keep track of parent if necessary */
@@ -601,14 +597,14 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
             /* Make callback for current record */
             if(op && (op)(H5B2_INT_NREC(internal, hdr, idx), op_data) < 0) {
                 /* Unlock current node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                 HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "'found' callback failed for B-tree find operation")
             } /* end if */
 
             /* Unlock current node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             /* Indicate record found */
@@ -623,7 +619,7 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
         H5B2_leaf_t *leaf;          /* Pointer to leaf node in B-tree */
 
         /* Lock B-tree leaf node */
-        if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, &curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, &curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
         /* Unpin parent if necessary */
@@ -636,13 +632,13 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
         /* Locate record */
         if(H5B2__locate_record(hdr->cls, leaf->nrec, hdr->nat_off, leaf->leaf_native, udata, &idx, &cmp) < 0) {
             /* Unlock current node before failing */
-            H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET);
+            H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET);
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
         } /* end if */
 
         if(cmp != 0) {
             /* Unlock leaf node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             /* Record not found */
@@ -652,7 +648,7 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
             /* Make callback for current record */
             if(op && (op)(H5B2_LEAF_NREC(leaf, hdr, idx), op_data) < 0) {
                 /* Unlock current node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                 HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "'found' callback failed for B-tree find operation")
@@ -681,7 +677,7 @@ H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_found_t op,
         } /* end else */
 
         /* Unlock current node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
     } /* end block */
 
@@ -715,8 +711,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order, hsize_t idx,
-    H5B2_found_t op, void *op_data)
+H5B2_index(H5B2_t *bt2, H5_iter_order_t order, hsize_t idx, H5B2_found_t op,
+    void *op_data)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
     H5B2_node_ptr_t curr_node_ptr;      /* Node pointer info for current node */
@@ -765,7 +761,7 @@ H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order, hsize_t idx,
         unsigned u;                         /* Local index variable */
 
         /* Lock B-tree current node */
-        if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, &curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (internal = H5B2__protect_internal(hdr, parent, &curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree internal node")
 
         /* Unpin parent if necessary */
@@ -783,7 +779,7 @@ H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order, hsize_t idx,
                 next_node_ptr = internal->node_ptrs[u];
 
                 /* Unlock current node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                 /* Keep track of parent if necessary */
@@ -802,14 +798,14 @@ H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order, hsize_t idx,
                 /* Make callback for current record */
                 if((op)(H5B2_INT_NREC(internal, hdr, u), op_data) < 0) {
                     /* Unlock current node */
-                    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
+                    if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                     HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "'found' callback failed for B-tree find operation")
                 } /* end if */
 
                 /* Unlock current node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                 HGOTO_DONE(SUCCEED);
@@ -829,7 +825,7 @@ H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order, hsize_t idx,
                 next_node_ptr = internal->node_ptrs[u];
 
                 /* Unlock current node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                 /* Keep track of parent if necessary */
@@ -852,7 +848,7 @@ H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order, hsize_t idx,
         H5B2_leaf_t *leaf;          /* Pointer to leaf node in B-tree */
 
         /* Lock B-tree leaf node */
-        if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, &curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, &curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
         /* Unpin parent if necessary */
@@ -868,14 +864,14 @@ H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order, hsize_t idx,
         /* Make callback for correct record */
         if((op)(H5B2_LEAF_NREC(leaf, hdr, idx), op_data) < 0) {
             /* Unlock current node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "'found' callback failed for B-tree find operation")
         } /* end if */
 
         /* Unlock current node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
     } /* end block */
 
@@ -904,8 +900,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_remove(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_remove_t op,
-    void *op_data)
+H5B2_remove(H5B2_t *bt2, void *udata, H5B2_remove_t op, void *op_data)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
     herr_t	ret_value = SUCCEED;    /* Return value */
@@ -929,7 +924,7 @@ H5B2_remove(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_remove_t op,
     if(hdr->depth > 0) {
         hbool_t depth_decreased = FALSE;  /* Flag to indicate whether the depth of the B-tree decreased */
 
-        if(H5B2__remove_internal(hdr, dxpl_id, &depth_decreased, NULL, NULL,
+        if(H5B2__remove_internal(hdr, &depth_decreased, NULL, NULL,
                 hdr->depth, &(hdr->cache_info), NULL, H5B2_POS_ROOT, &hdr->root,
                 udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree internal node")
@@ -949,7 +944,7 @@ H5B2_remove(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_remove_t op,
         } /* end for */
     } /* end if */
     else {
-        if(H5B2__remove_leaf(hdr, dxpl_id, &hdr->root, H5B2_POS_ROOT, hdr, udata, op, op_data) < 0)
+        if(H5B2__remove_leaf(hdr, &hdr->root, H5B2_POS_ROOT, hdr, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree leaf node")
     } /* end else */
 
@@ -979,8 +974,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_remove_by_idx(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order,
-    hsize_t idx, H5B2_remove_t op, void *op_data)
+H5B2_remove_by_idx(H5B2_t *bt2, H5_iter_order_t order, hsize_t idx,
+    H5B2_remove_t op, void *op_data)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
     herr_t	ret_value = SUCCEED;    /* Return value */
@@ -1012,7 +1007,7 @@ H5B2_remove_by_idx(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order,
     if(hdr->depth > 0) {
         hbool_t depth_decreased = FALSE;  /* Flag to indicate whether the depth of the B-tree decreased */
 
-        if(H5B2__remove_internal_by_idx(hdr, dxpl_id, &depth_decreased, NULL, NULL,
+        if(H5B2__remove_internal_by_idx(hdr, &depth_decreased, NULL, NULL,
                 hdr->depth, &(hdr->cache_info), NULL, &hdr->root, H5B2_POS_ROOT,
                 idx, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree internal node")
@@ -1032,7 +1027,7 @@ H5B2_remove_by_idx(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order,
         } /* end for */
     } /* end if */
     else {
-        if(H5B2__remove_leaf_by_idx(hdr, dxpl_id, &hdr->root, H5B2_POS_ROOT, hdr, (unsigned)idx, op, op_data) < 0)
+        if(H5B2__remove_leaf_by_idx(hdr, &hdr->root, H5B2_POS_ROOT, hdr, (unsigned)idx, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree leaf node")
     } /* end else */
 
@@ -1103,7 +1098,7 @@ H5B2_get_nrec(const H5B2_t *bt2, hsize_t *nrec)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_neighbor(H5B2_t *bt2, hid_t dxpl_id, H5B2_compare_t range, void *udata,
+H5B2_neighbor(H5B2_t *bt2, H5B2_compare_t range, void *udata,
     H5B2_found_t op, void *op_data)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
@@ -1127,11 +1122,11 @@ H5B2_neighbor(H5B2_t *bt2, hid_t dxpl_id, H5B2_compare_t range, void *udata,
 
     /* Attempt to find neighbor record in B-tree */
     if(hdr->depth > 0) {
-        if(H5B2__neighbor_internal(hdr, dxpl_id, hdr->depth, &hdr->root, NULL, range, hdr, udata, op, op_data) < 0)
+        if(H5B2__neighbor_internal(hdr, hdr->depth, &hdr->root, NULL, range, hdr, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "unable to find neighbor record in B-tree internal node")
     } /* end if */
     else {
-        if(H5B2__neighbor_leaf(hdr, dxpl_id, &hdr->root, NULL, range, hdr, udata, op, op_data) < 0)
+        if(H5B2__neighbor_leaf(hdr, &hdr->root, NULL, range, hdr, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "unable to find neighbor record in B-tree leaf node")
     } /* end else */
 
@@ -1161,8 +1156,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
-    void *op_data)
+H5B2_modify(H5B2_t *bt2, void *udata, H5B2_modify_t op, void *op_data)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
     H5B2_node_ptr_t curr_node_ptr;      /* Node pointer info for current node */
@@ -1208,7 +1202,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
         H5B2_node_ptr_t next_node_ptr;      /* Node pointer info for next node */
 
         /* Lock B-tree current node */
-        if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, &curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (internal = H5B2__protect_internal(hdr, parent, &curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree internal node")
 
         /* Unpin parent if necessary */
@@ -1221,7 +1215,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
         /* Locate node pointer for child */
         if(H5B2__locate_record(hdr->cls, internal->nrec, hdr->nat_off, internal->int_native, udata, &idx, &cmp) < 0) {
             /* Unlock current node before failing */
-            H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET);
+            H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET);
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
         } /* end if */
 
@@ -1251,7 +1245,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
             } /* end if */
 
             /* Unlock current node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             /* Keep track of parent if necessary */
@@ -1270,7 +1264,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
                 HDassert(changed == FALSE);
 
                 /* Unlock current node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTMODIFY, FAIL, "'modify' callback failed for B-tree find operation")
@@ -1280,7 +1274,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
             internal_flags |= changed ? H5AC__DIRTIED_FLAG : 0;
 
             /* Unlock current node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, internal_flags) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, internal_flags) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             HGOTO_DONE(SUCCEED);
@@ -1296,7 +1290,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
         hbool_t changed = FALSE;/* Whether the 'modify' callback changed the record */
 
         /* Lock B-tree leaf node */
-        if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, &curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, &curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
         /* Unpin parent if necessary */
@@ -1309,13 +1303,13 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
         /* Locate record */
         if(H5B2__locate_record(hdr->cls, leaf->nrec, hdr->nat_off, leaf->leaf_native, udata, &idx, &cmp) < 0) {
             /* Unlock current node before failing */
-            H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET);
+            H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET);
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
         } /* end if */
 
         if(cmp != 0) {
             /* Unlock leaf node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             /* Note: don't push error on stack, leave that to next higher level,
@@ -1335,7 +1329,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
                 HDassert(changed == FALSE);
 
                 /* Unlock current node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTMODIFY, FAIL, "'modify' callback failed for B-tree find operation")
@@ -1367,7 +1361,7 @@ H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata, H5B2_modify_t op,
         leaf_flags |= (changed ? H5AC__DIRTIED_FLAG : 0);
 
         /* Unlock current node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, leaf_flags) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, leaf_flags) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
     } /* end block */
 
@@ -1396,7 +1390,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_close(H5B2_t *bt2, hid_t dxpl_id)
+H5B2_close(H5B2_t *bt2)
 {
     haddr_t bt2_addr = HADDR_UNDEF;     /* Address of v2 B-tree (for deletion) */
     hbool_t pending_delete = FALSE;     /* Whether the v2 B-tree is pending deletion */
@@ -1447,7 +1441,7 @@ H5B2_close(H5B2_t *bt2, hid_t dxpl_id)
 
         /* Lock the v2 B-tree header into memory */
         /* (OK to pass in NULL for callback context, since we know the header must be in the cache) */
-        if(NULL == (hdr = H5B2__hdr_protect(bt2->f, dxpl_id, bt2_addr, NULL, H5AC__NO_FLAGS_SET)))
+        if(NULL == (hdr = H5B2__hdr_protect(bt2->f, bt2_addr, NULL, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect v2 B-tree header")
 
         /* Set the shared v2 B-tree header's file context for this operation */
@@ -1461,7 +1455,7 @@ H5B2_close(H5B2_t *bt2, hid_t dxpl_id)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDEC, FAIL, "can't decrement reference count on shared v2 B-tree header")
 
         /* Delete v2 B-tree, starting with header (unprotects header) */
-        if(H5B2__hdr_delete(hdr, dxpl_id) < 0)
+        if(H5B2__hdr_delete(hdr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to delete v2 B-tree")
     } /* end if */
     else {
@@ -1505,8 +1499,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *ctx_udata,
-    H5B2_remove_t op, void *op_data)
+H5B2_delete(H5F_t *f, haddr_t addr, void *ctx_udata, H5B2_remove_t op,
+    void *op_data)
 {
     H5B2_hdr_t	*hdr = NULL;            /* Pointer to the B-tree header */
     herr_t	ret_value = SUCCEED;    /* Return value */
@@ -1521,7 +1515,7 @@ H5B2_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *ctx_udata,
 #ifdef QAK
 HDfprintf(stderr, "%s: addr = %a\n", FUNC, addr);
 #endif /* QAK */
-    if(NULL == (hdr = H5B2__hdr_protect(f, dxpl_id, addr, ctx_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (hdr = H5B2__hdr_protect(f, addr, ctx_udata, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect v2 B-tree header")
 
     /* Remember the callback & context for later */
@@ -1536,14 +1530,14 @@ HDfprintf(stderr, "%s: addr = %a\n", FUNC, addr);
         hdr->f = f;
 
         /* Delete v2 B-tree now, starting with header (unprotects header) */
-        if(H5B2__hdr_delete(hdr, dxpl_id) < 0)
+        if(H5B2__hdr_delete(hdr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to delete v2 B-tree")
         hdr = NULL;
     } /* end if */
 
 done:
     /* Unprotect the header, if an error occurred */
-    if(hdr && H5B2__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5B2__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release v2 B-tree header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1564,7 +1558,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_depend(H5B2_t *bt2, hid_t dxpl_id, H5AC_proxy_entry_t *parent)
+H5B2_depend(H5B2_t *bt2, H5AC_proxy_entry_t *parent)
 {
     /* Local variables */
     H5B2_hdr_t  *hdr = bt2->hdr;        /* Header for B-tree */
@@ -1593,7 +1587,7 @@ H5B2_depend(H5B2_t *bt2, hid_t dxpl_id, H5AC_proxy_entry_t *parent)
         hdr->f = bt2->f;
 
         /* Add the v2 B-tree as a child of the parent (proxy) */
-        if(H5AC_proxy_entry_add_child(parent, hdr->f, dxpl_id, hdr->top_proxy) < 0)
+        if(H5AC_proxy_entry_add_child(parent, hdr->f, hdr->top_proxy) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSET, FAIL, "unable to add v2 B-tree as child of proxy")
 	hdr->parent = parent;
     } /* end if */
diff --git a/src/H5B2cache.c b/src/H5B2cache.c
index e9b6a41..2e1d37b 100644
--- a/src/H5B2cache.c
+++ b/src/H5B2cache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5B2dbg.c b/src/H5B2dbg.c
index 19ca89a..c4f56e5 100644
--- a/src/H5B2dbg.c
+++ b/src/H5B2dbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -88,7 +86,7 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth,
+H5B2__hdr_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth,
     const H5B2_class_t *type, haddr_t obj_addr)
 {
     H5B2_hdr_t	*hdr = NULL;            /* B-tree header info */
@@ -110,7 +108,7 @@ H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(type);
 
     /* Load the B-tree header  */
-    if(NULL == (hdr = H5B2__hdr_protect(f, dxpl_id, addr, f, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5B2__hdr_protect(f, addr, f, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header")
 
     /* Set file pointer for this B-tree operation */
@@ -162,7 +160,7 @@ H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     } /* end for */
 
 done:
-    if(hdr && H5B2__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5B2__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release v2 B-tree header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -183,7 +181,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth,
+H5B2__int_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth,
     const H5B2_class_t *type, haddr_t hdr_addr, unsigned nrec, unsigned depth, haddr_t obj_addr)
 {
     H5B2_hdr_t	*hdr = NULL;            /* B-tree header */
@@ -209,7 +207,7 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(nrec > 0);
 
     /* Load the B-tree header */
-    if(NULL == (hdr = H5B2__hdr_protect(f, dxpl_id, hdr_addr, f, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5B2__hdr_protect(f, hdr_addr, f, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load v2 B-tree header")
 
     /* Set file pointer for this B-tree operation */
@@ -220,8 +218,8 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
      */
     H5_CHECK_OVERFLOW(depth, unsigned, uint16_t);
     node_ptr.addr = addr;
-    H5_CHECKED_ASSIGN(node_ptr.node_nrec, unsigned, nrec, uint16_t)
-    if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, NULL, &node_ptr, (uint16_t)depth, FALSE, H5AC__READ_ONLY_FLAG)))
+    H5_CHECKED_ASSIGN(node_ptr.node_nrec, uint16_t, nrec, unsigned)
+    if(NULL == (internal = H5B2__protect_internal(hdr, NULL, &node_ptr, (uint16_t)depth, FALSE, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")
 
     /* Print opening message */
@@ -272,9 +270,9 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
               internal->node_ptrs[u].addr);
 
 done:
-    if(hdr && H5B2__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5B2__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release v2 B-tree header")
-    if(internal && H5AC_unprotect(f, dxpl_id, H5AC_BT2_INT, addr, internal, H5AC__NO_FLAGS_SET) < 0)
+    if(internal && H5AC_unprotect(f, H5AC_BT2_INT, addr, internal, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree internal node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -295,7 +293,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth,
+H5B2__leaf_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth,
     const H5B2_class_t *type, haddr_t hdr_addr, unsigned nrec, haddr_t obj_addr)
 {
     H5B2_hdr_t	*hdr = NULL;            /* B-tree header */
@@ -321,7 +319,7 @@ H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent
     HDassert(nrec > 0);
 
     /* Load the B-tree header */
-    if(NULL == (hdr = H5B2__hdr_protect(f, dxpl_id, hdr_addr, f, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5B2__hdr_protect(f, hdr_addr, f, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect v2 B-tree header")
 
     /* Set file pointer for this B-tree operation */
@@ -332,8 +330,8 @@ H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent
      */
     H5_CHECK_OVERFLOW(nrec, unsigned, uint16_t);
     node_ptr.addr = addr;
-    H5_CHECKED_ASSIGN(node_ptr.node_nrec, unsigned, nrec, uint16_t)
-    if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, NULL, &node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
+    H5_CHECKED_ASSIGN(node_ptr.node_nrec, uint16_t, nrec, unsigned)
+    if(NULL == (leaf = H5B2__protect_leaf(hdr, NULL, &node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
     /* Print opening message */
@@ -368,9 +366,9 @@ H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent
     } /* end for */
 
 done:
-    if(hdr && H5B2__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5B2__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree header")
-    if(leaf && H5AC_unprotect(f, dxpl_id, H5AC_BT2_LEAF, addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+    if(leaf && H5AC_unprotect(f, H5AC_BT2_LEAF, addr, leaf, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_PROTECT, FAIL, "unable to release B-tree leaf node")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5B2hdr.c b/src/H5B2hdr.c
index 251a33d..e9b6810 100644
--- a/src/H5B2hdr.c
+++ b/src/H5B2hdr.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -284,8 +282,7 @@ done:
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5B2__hdr_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam,
-    void *ctx_udata)
+H5B2__hdr_create(H5F_t *f, const H5B2_create_t *cparam, void *ctx_udata)
 {
     H5B2_hdr_t *hdr = NULL;             /* The new v2 B-tree header information */
     hbool_t inserted = FALSE;           /* Whether the header was inserted into cache */
@@ -308,7 +305,7 @@ H5B2__hdr_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam,
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, HADDR_UNDEF, "can't create shared B-tree info")
 
     /* Allocate space for the header on disk */
-    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)hdr->hdr_size)))
+    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_BTREE, (hsize_t)hdr->hdr_size)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, HADDR_UNDEF, "file allocation failed for B-tree header")
 
     /* Create 'top' proxy for extensible array entries */
@@ -317,13 +314,13 @@ H5B2__hdr_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam,
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCREATE, HADDR_UNDEF, "can't create v2 B-tree proxy")
 
     /* Cache the new B-tree node */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_BT2_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_BT2_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, HADDR_UNDEF, "can't add B-tree header to cache")
     inserted = TRUE;
 
     /* Add header as child of 'top' proxy */
     if(hdr->top_proxy)
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, dxpl_id, hdr) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, hdr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSET, HADDR_UNDEF, "unable to add v2 B-tree header as child of array proxy")
 
     /* Set address of v2 B-tree header to return */
@@ -338,7 +335,7 @@ done:
                     HDONE_ERROR(H5E_BTREE, H5E_CANTREMOVE, HADDR_UNDEF, "unable to remove v2 B-tree header from cache")
 
             /* Release header's disk space */
-            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_BTREE, dxpl_id, hdr->addr, (hsize_t)hdr->hdr_size) < 0)
+            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_BTREE, hdr->addr, (hsize_t)hdr->hdr_size) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTFREE, HADDR_UNDEF, "unable to free v2 B-tree header")
 
             /* Destroy header */
@@ -526,7 +523,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5B2_hdr_t *
-H5B2__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t hdr_addr, void *ctx_udata,
+H5B2__hdr_protect(H5F_t *f, haddr_t hdr_addr, void *ctx_udata,
     unsigned flags)
 {
     H5B2_hdr_cache_ud_t udata;          /* User data for cache callbacks */
@@ -548,7 +545,7 @@ H5B2__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t hdr_addr, void *ctx_udata,
     udata.ctx_udata = ctx_udata;
 
     /* Protect the header */
-    if(NULL == (hdr = (H5B2_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, &udata, flags)))
+    if(NULL == (hdr = (H5B2_hdr_t *)H5AC_protect(f, H5AC_BT2_HDR, hdr_addr, &udata, flags)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, NULL, "unable to load v2 B-tree header, address = %llu", (unsigned long long)hdr_addr)
     hdr->f = f;   /* (Must be set again here, in case the header was already in the cache -QAK) */
 
@@ -559,7 +556,7 @@ H5B2__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t hdr_addr, void *ctx_udata,
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCREATE, NULL, "can't create v2 B-tree proxy")
 
         /* Add header as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, dxpl_id, hdr) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, hdr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSET, NULL, "unable to add v2 B-tree header as child of proxy")
     } /* end if */
 
@@ -570,7 +567,7 @@ done:
     /* Clean up on error */
     if(!ret_value) {
         /* Release the header, if it was protected */
-        if(hdr && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+        if(hdr && H5AC_unprotect(hdr->f, H5AC_BT2_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, NULL, "unable to unprotect v2 B-tree header, address = %llu", (unsigned long long)hdr_addr)
     } /* end if */
 
@@ -592,7 +589,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__hdr_unprotect(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags)
+H5B2__hdr_unprotect(H5B2_hdr_t *hdr, unsigned cache_flags)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -602,7 +599,7 @@ H5B2__hdr_unprotect(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags)
     HDassert(hdr);
 
     /* Unprotect the header */
-    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_HDR, hdr->addr, hdr, cache_flags) < 0)
+    if(H5AC_unprotect(hdr->f, H5AC_BT2_HDR, hdr->addr, hdr, cache_flags) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to unprotect v2 B-tree header, address = %llu", (unsigned long long)hdr->addr)
 
 done:
@@ -701,7 +698,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__hdr_delete(H5B2_hdr_t *hdr, hid_t dxpl_id)
+H5B2__hdr_delete(H5B2_hdr_t *hdr)
 {
     unsigned cache_flags = H5AC__NO_FLAGS_SET;  /* Flags for unprotecting v2 B-tree header */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -727,7 +724,7 @@ H5B2__hdr_delete(H5B2_hdr_t *hdr, hid_t dxpl_id)
 
     /* Delete all nodes in B-tree */
     if(H5F_addr_defined(hdr->root.addr))
-        if(H5B2__delete_node(hdr, dxpl_id, hdr->depth, &hdr->root, hdr, hdr->remove_op, hdr->remove_op_data) < 0)
+        if(H5B2__delete_node(hdr, hdr->depth, &hdr->root, hdr, hdr->remove_op, hdr->remove_op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to delete B-tree nodes")
 
     /* Indicate that the heap header should be deleted & file space freed */
@@ -735,7 +732,7 @@ H5B2__hdr_delete(H5B2_hdr_t *hdr, hid_t dxpl_id)
 
 done:
     /* Unprotect the header with appropriate flags */
-    if(H5B2__hdr_unprotect(hdr, dxpl_id, cache_flags) < 0)
+    if(H5B2__hdr_unprotect(hdr, cache_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release v2 B-tree header")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5B2int.c b/src/H5B2int.c
index 47100fd..b3f855f 100644
--- a/src/H5B2int.c
+++ b/src/H5B2int.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -58,7 +56,7 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5B2__update_child_flush_depends(H5B2_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5B2__update_child_flush_depends(H5B2_hdr_t *hdr, 
     unsigned depth, const H5B2_node_ptr_t *node_ptrs, unsigned start_idx,
     unsigned end_idx, void *old_parent, void *new_parent);
 
@@ -148,9 +146,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_node_ptr_t *curr_node_ptr, unsigned *parent_cache_info_flags_ptr,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx)
+H5B2__split1(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
+    unsigned *parent_cache_info_flags_ptr, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx)
 {
     const H5AC_class_t *child_class;    /* Pointer to child node's class info */
     haddr_t left_addr, right_addr;      /* Addresses of left & right child nodes */
@@ -182,7 +180,7 @@ H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Create new internal node */
         internal->node_ptrs[idx + 1].all_nrec = internal->node_ptrs[idx + 1].node_nrec = 0;
-        if(H5B2__create_internal(hdr, dxpl_id, internal, &(internal->node_ptrs[idx + 1]), (uint16_t)(depth - 1)) < 0)
+        if(H5B2__create_internal(hdr, internal, &(internal->node_ptrs[idx + 1]), (uint16_t)(depth - 1)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create new internal node")
 
         /* Setup information for unlocking child nodes */
@@ -190,10 +188,10 @@ H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Protect both leaves */
         /* (Shadow left node if doing SWMR writes) */
-        if(NULL == (left_int = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_int = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         left_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_int = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_int = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -212,7 +210,7 @@ H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Create new leaf node */
         internal->node_ptrs[idx + 1].all_nrec = internal->node_ptrs[idx + 1].node_nrec = 0;
-        if(H5B2__create_leaf(hdr, dxpl_id, internal, &(internal->node_ptrs[idx + 1])) < 0)
+        if(H5B2__create_leaf(hdr, internal, &(internal->node_ptrs[idx + 1])) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create new leaf node")
 
         /* Setup information for unlocking child nodes */
@@ -220,10 +218,10 @@ H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Protect both leaves */
         /* (Shadow the left node if doing SWMR writes) */
-        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         left_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx + 1], FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -301,7 +299,7 @@ H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
     /* Update flush dependencies for grandchildren, if using SWMR */
     if(hdr->swmr_write && depth > 1)
-        if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, right_node_ptrs,
+        if(H5B2__update_child_flush_depends(hdr, depth, right_node_ptrs,
                 0, (unsigned)(*right_nrec + 1), left_child, right_child) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -319,9 +317,9 @@ H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
 done:
     /* Release child nodes (marked as dirty) */
-    if(left_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, left_addr, left_child, left_child_flags) < 0)
+    if(left_child && H5AC_unprotect(hdr->f, child_class, left_addr, left_child, left_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree leaf node")
-    if(right_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, right_addr, right_child, right_child_flags) < 0)
+    if(right_child && H5AC_unprotect(hdr->f, child_class, right_addr, right_child, right_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree leaf node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -343,7 +341,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__split_root(H5B2_hdr_t *hdr, hid_t dxpl_id)
+H5B2__split_root(H5B2_hdr_t *hdr)
 {
     H5B2_internal_t *new_root = NULL;   /* Pointer to new root node */
     unsigned new_root_flags = H5AC__NO_FLAGS_SET;   /* Cache flags for new root node */
@@ -383,23 +381,23 @@ H5B2__split_root(H5B2_hdr_t *hdr, hid_t dxpl_id)
 
     /* Create new internal node to use as root */
     hdr->root.node_nrec = 0;
-    if(H5B2__create_internal(hdr, dxpl_id, hdr, &(hdr->root), hdr->depth) < 0)
+    if(H5B2__create_internal(hdr, hdr, &(hdr->root), hdr->depth) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create new internal node")
 
     /* Protect new root node */
-    if(NULL == (new_root = H5B2__protect_internal(hdr, dxpl_id, hdr, &hdr->root, hdr->depth, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (new_root = H5B2__protect_internal(hdr, hdr, &hdr->root, hdr->depth, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
 
     /* Set first node pointer in root node to old root node pointer info */
     new_root->node_ptrs[0] = old_root_ptr;
 
     /* Split original root node */
-    if(H5B2__split1(hdr, dxpl_id, hdr->depth, &(hdr->root), NULL, new_root, &new_root_flags, 0) < 0)
+    if(H5B2__split1(hdr, hdr->depth, &(hdr->root), NULL, new_root, &new_root_flags, 0) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split old root node")
 
 done:
     /* Release new root node (marked as dirty) */
-    if(new_root && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, hdr->root.addr, new_root, new_root_flags) < 0)
+    if(new_root && H5AC_unprotect(hdr->f, H5AC_BT2_INT, hdr->root.addr, new_root, new_root_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree internal node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -421,8 +419,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__redistribute2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_internal_t *internal, unsigned idx)
+H5B2__redistribute2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
+    unsigned idx)
 {
     const H5AC_class_t *child_class;    /* Pointer to child node's class info */
     haddr_t left_addr, right_addr;      /* Addresses of left & right child nodes */
@@ -450,10 +448,10 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock left & right B-tree child nodes */
         /* (Shadow both nodes if doing SWMR writes) */
-        if(NULL == (left_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         left_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -476,10 +474,10 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock left & right B-tree child nodes */
         /* (Shadow both nodes if doing SWMR writes) */
-        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         left_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx + 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -544,7 +542,7 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Update flush dependencies for grandchildren, if using SWMR */
         if(hdr->swmr_write && depth > 1)
-            if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, left_node_ptrs,
+            if(H5B2__update_child_flush_depends(hdr, depth, left_node_ptrs,
                     (unsigned)(*left_nrec + 1), (unsigned)(*left_nrec + move_nrec + 1), right_child, left_child) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -600,7 +598,7 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Update flush dependencies for grandchildren, if using SWMR */
         if(hdr->swmr_write && depth > 1)
-            if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, right_node_ptrs,
+            if(H5B2__update_child_flush_depends(hdr, depth, right_node_ptrs,
                     0, (unsigned)move_nrec, left_child, right_child) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -641,9 +639,9 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
 done:
     /* Release child nodes (marked as dirty) */
-    if(left_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, left_addr, left_child, left_child_flags) < 0)
+    if(left_child && H5AC_unprotect(hdr->f, child_class, left_addr, left_child, left_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
-    if(right_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, right_addr, right_child, right_child_flags) < 0)
+    if(right_child && H5AC_unprotect(hdr->f, child_class, right_addr, right_child, right_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -665,8 +663,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx)
+H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx)
 {
     H5B2_node_ptr_t *left_node_ptrs = NULL, *right_node_ptrs = NULL; /* Pointers to childs' node pointer info */
     H5B2_node_ptr_t *middle_node_ptrs = NULL; /* Pointers to childs' node pointer info */
@@ -703,13 +701,13 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock B-tree child nodes */
         /* (Shadow all nodes if doing SWMR writes) */
-        if(NULL == (left_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx - 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx - 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         left_addr = internal->node_ptrs[idx - 1].addr;
-        if(NULL == (middle_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (middle_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         middle_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -737,13 +735,13 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock B-tree child nodes */
         /* (Shadow all nodes if doing SWMR writes) */
-        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx - 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx - 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         left_addr = internal->node_ptrs[idx - 1].addr;
-        if(NULL == (middle_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (middle_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         middle_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx + 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -814,7 +812,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
             /* Update flush dependencies for grandchildren, if using SWMR */
             if(hdr->swmr_write && depth > 1)
-                if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, left_node_ptrs,
+                if(H5B2__update_child_flush_depends(hdr, depth, left_node_ptrs,
                         (unsigned)(*left_nrec + 1), (unsigned)(*left_nrec + moved_middle_nrec + 1), middle_child, left_child) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -863,7 +861,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
             /* Update flush dependencies for grandchildren, if using SWMR */
             if(hdr->swmr_write && depth > 1)
-                if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, right_node_ptrs,
+                if(H5B2__update_child_flush_depends(hdr, depth, right_node_ptrs,
                         0, (unsigned)right_nrec_move, middle_child, right_child) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -912,7 +910,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
             /* Update flush dependencies for grandchildren, if using SWMR */
             if(hdr->swmr_write && depth > 1)
-                if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, middle_node_ptrs,
+                if(H5B2__update_child_flush_depends(hdr, depth, middle_node_ptrs,
                         0, (unsigned)left_nrec_move, left_child, middle_child) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -960,7 +958,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
             /* Update flush dependencies for grandchildren, if using SWMR */
             if(hdr->swmr_write && depth > 1)
-                if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, middle_node_ptrs,
+                if(H5B2__update_child_flush_depends(hdr, depth, middle_node_ptrs,
                         (unsigned)(curr_middle_nrec + 1), (unsigned)(curr_middle_nrec + right_nrec_move + 1), right_child, middle_child) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -1012,11 +1010,11 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
 done:
     /* Unlock child nodes (marked as dirty) */
-    if(left_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, left_addr, left_child, left_child_flags) < 0)
+    if(left_child && H5AC_unprotect(hdr->f, child_class, left_addr, left_child, left_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
-    if(middle_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, middle_addr, middle_child, middle_child_flags) < 0)
+    if(middle_child && H5AC_unprotect(hdr->f, child_class, middle_addr, middle_child, middle_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
-    if(right_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, right_addr, right_child, right_child_flags) < 0)
+    if(right_child && H5AC_unprotect(hdr->f, child_class, right_addr, right_child, right_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1039,9 +1037,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__merge2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_node_ptr_t *curr_node_ptr, unsigned *parent_cache_info_flags_ptr,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx)
+H5B2__merge2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
+    unsigned *parent_cache_info_flags_ptr, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx)
 {
     const H5AC_class_t *child_class;    /* Pointer to child node's class info */
     haddr_t left_addr, right_addr;      /* Addresses of left & right child nodes */
@@ -1070,10 +1068,10 @@ H5B2__merge2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock left & right B-tree child nodes */
         /* (Shadow the left node if doing SWMR writes) */
-        if(NULL == (left_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         left_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -1096,10 +1094,10 @@ H5B2__merge2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock left & right B-tree child nodes */
         /* (Shadow the left node if doing SWMR writes) */
-        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         left_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx + 1], FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -1126,7 +1124,7 @@ H5B2__merge2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Update flush dependencies for grandchildren, if using SWMR */
         if(hdr->swmr_write && depth > 1)
-            if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, left_node_ptrs,
+            if(H5B2__update_child_flush_depends(hdr, depth, left_node_ptrs,
                     (unsigned)(*left_nrec + 1), (unsigned)(*left_nrec + *right_nrec + 2), right_child, left_child) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -1175,11 +1173,11 @@ H5B2__merge2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
 done:
     /* Unlock left node (marked as dirty) */
-    if(left_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, left_addr, left_child, left_child_flags) < 0)
+    if(left_child && H5AC_unprotect(hdr->f, child_class, left_addr, left_child, left_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
 
     /* Delete right node & remove from cache (marked as dirty) */
-    if(right_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, right_addr, right_child, right_child_flags) < 0)
+    if(right_child && H5AC_unprotect(hdr->f, child_class, right_addr, right_child, right_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1202,9 +1200,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__merge3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_node_ptr_t *curr_node_ptr, unsigned *parent_cache_info_flags_ptr,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx)
+H5B2__merge3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
+    unsigned *parent_cache_info_flags_ptr, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx)
 {
     const H5AC_class_t *child_class;    /* Pointer to child node's class info */
     haddr_t left_addr, right_addr;      /* Addresses of left & right child nodes */
@@ -1241,13 +1239,13 @@ H5B2__merge3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock B-tree child nodes */
         /* (Shadow left and middle nodes if doing SWMR writes) */
-        if(NULL == (left_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx - 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx - 1], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         left_addr = internal->node_ptrs[idx - 1].addr;
-        if(NULL == (middle_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (middle_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         middle_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx + 1], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -1275,13 +1273,13 @@ H5B2__merge3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Lock B-tree child nodes */
         /* (Shadow left and middle nodes if doing SWMR writes) */
-        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx - 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (left_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx - 1], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         left_addr = internal->node_ptrs[idx - 1].addr;
-        if(NULL == (middle_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
+        if(NULL == (middle_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx], hdr->swmr_write, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         middle_addr = internal->node_ptrs[idx].addr;
-        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx + 1], FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (right_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx + 1], FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         right_addr = internal->node_ptrs[idx + 1].addr;
 
@@ -1334,7 +1332,7 @@ H5B2__merge3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Update flush dependencies for grandchildren, if using SWMR */
         if(hdr->swmr_write && depth > 1)
-            if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, left_node_ptrs,
+            if(H5B2__update_child_flush_depends(hdr, depth, left_node_ptrs,
                     (unsigned)(*left_nrec + 1), (unsigned)(*left_nrec + middle_nrec_move + 1), middle_child, left_child) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -1362,7 +1360,7 @@ H5B2__merge3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Update flush dependencies for grandchildren, if using SWMR */
         if(hdr->swmr_write && depth > 1)
-            if(H5B2__update_child_flush_depends(hdr, dxpl_id, depth, middle_node_ptrs,
+            if(H5B2__update_child_flush_depends(hdr, depth, middle_node_ptrs,
                     (unsigned)(*middle_nrec + 1), (unsigned)(*middle_nrec + *right_nrec + 2), right_child, middle_child) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child nodes to new parent")
 
@@ -1417,13 +1415,13 @@ H5B2__merge3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
 done:
     /* Unlock left & middle nodes (marked as dirty) */
-    if(left_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, left_addr, left_child, left_child_flags) < 0)
+    if(left_child && H5AC_unprotect(hdr->f, child_class, left_addr, left_child, left_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
-    if(middle_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, middle_addr, middle_child, middle_child_flags) < 0)
+    if(middle_child && H5AC_unprotect(hdr->f, child_class, middle_addr, middle_child, middle_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
 
     /* Delete right node & remove from cache (marked as dirty) */
-    if(right_child && H5AC_unprotect(hdr->f, dxpl_id, child_class, right_addr, right_child, right_child_flags) < 0)
+    if(right_child && H5AC_unprotect(hdr->f, child_class, right_addr, right_child, right_child_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1444,7 +1442,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__insert(H5B2_hdr_t *hdr, hid_t dxpl_id, void *udata)
+H5B2__insert(H5B2_hdr_t *hdr, void *udata)
 {
     herr_t	ret_value = SUCCEED;    /* Return value */
 
@@ -1457,23 +1455,23 @@ H5B2__insert(H5B2_hdr_t *hdr, hid_t dxpl_id, void *udata)
     /* Check if the root node is allocated yet */
     if(!H5F_addr_defined(hdr->root.addr)) {
         /* Create root node as leaf node in B-tree */
-        if(H5B2__create_leaf(hdr, dxpl_id, hdr, &(hdr->root)) < 0)
+        if(H5B2__create_leaf(hdr, hdr, &(hdr->root)) < 0)
 	    HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to create root node")
     } /* end if */
     /* Check if we need to split the root node (equiv. to a 1->2 node split) */
     else if(hdr->root.node_nrec == hdr->node_info[hdr->depth].split_nrec) {
         /* Split root node */
-        if(H5B2__split_root(hdr, dxpl_id) < 0)
+        if(H5B2__split_root(hdr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split root node")
     } /* end if */
 
     /* Attempt to insert record into B-tree */
     if(hdr->depth > 0) {
-        if(H5B2__insert_internal(hdr, dxpl_id, hdr->depth, NULL, &hdr->root, H5B2_POS_ROOT, hdr, udata) < 0)
+        if(H5B2__insert_internal(hdr, hdr->depth, NULL, &hdr->root, H5B2_POS_ROOT, hdr, udata) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into B-tree internal node")
     } /* end if */
     else {
-        if(H5B2__insert_leaf(hdr, dxpl_id, &hdr->root, H5B2_POS_ROOT, hdr, udata) < 0)
+        if(H5B2__insert_leaf(hdr, &hdr->root, H5B2_POS_ROOT, hdr, udata) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into B-tree leaf node")
     } /* end else */
 
@@ -1504,9 +1502,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__iterate_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    const H5B2_node_ptr_t *curr_node, void *parent, H5B2_operator_t op,
-    void *op_data)
+H5B2__iterate_node(H5B2_hdr_t *hdr, uint16_t depth, const H5B2_node_ptr_t *curr_node,
+    void *parent, H5B2_operator_t op, void *op_data)
 {
     const H5AC_class_t *curr_node_class = NULL; /* Pointer to current node's class info */
     void *node = NULL;                  /* Pointers to current node */
@@ -1529,7 +1526,7 @@ H5B2__iterate_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
         H5B2_internal_t *internal;     /* Pointer to internal node */
 
         /* Lock the current B-tree node */
-        if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, (H5B2_node_ptr_t *)curr_node, depth, FALSE, H5AC__READ_ONLY_FLAG))) /* Casting away const OK -QAK */
+        if(NULL == (internal = H5B2__protect_internal(hdr, parent, (H5B2_node_ptr_t *)curr_node, depth, FALSE, H5AC__READ_ONLY_FLAG))) /* Casting away const OK -QAK */
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
 
         /* Set up information about current node */
@@ -1548,7 +1545,7 @@ H5B2__iterate_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
         H5B2_leaf_t *leaf;             /* Pointer to leaf node */
 
         /* Lock the current B-tree node */
-        if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, (H5B2_node_ptr_t *)curr_node, FALSE, H5AC__READ_ONLY_FLAG)))   /* Casting away const OK -QAK */
+        if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, (H5B2_node_ptr_t *)curr_node, FALSE, H5AC__READ_ONLY_FLAG)))   /* Casting away const OK -QAK */
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
         /* Set up information about current node */
@@ -1565,7 +1562,7 @@ H5B2__iterate_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
     HDmemcpy(native, node_native, (hdr->cls->nrec_size * curr_node->node_nrec));
 
     /* Unlock the node */
-    if(H5AC_unprotect(hdr->f, dxpl_id, curr_node_class, curr_node->addr, node, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
+    if(H5AC_unprotect(hdr->f, curr_node_class, curr_node->addr, node, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
     if(hdr->swmr_write)
         node_pinned = TRUE;
@@ -1576,7 +1573,7 @@ H5B2__iterate_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
     for(u = 0; u < curr_node->node_nrec && !ret_value; u++) {
         /* Descend into child node, if current node is an internal node */
         if(depth > 0) {
-            if((ret_value = H5B2__iterate_node(hdr, dxpl_id, (uint16_t)(depth - 1), &(node_ptrs[u]), node, op, op_data)) < 0)
+            if((ret_value = H5B2__iterate_node(hdr, (uint16_t)(depth - 1), &(node_ptrs[u]), node, op, op_data)) < 0)
                 HERROR(H5E_BTREE, H5E_CANTLIST, "node iteration failed");
         } /* end if */
 
@@ -1589,7 +1586,7 @@ H5B2__iterate_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
     /* Descend into last child node, if current node is an internal node */
     if(!ret_value && depth > 0) {
-        if((ret_value = H5B2__iterate_node(hdr, dxpl_id, (uint16_t)(depth - 1), &(node_ptrs[u]), node, op, op_data)) < 0)
+        if((ret_value = H5B2__iterate_node(hdr, (uint16_t)(depth - 1), &(node_ptrs[u]), node, op, op_data)) < 0)
             HERROR(H5E_BTREE, H5E_CANTLIST, "node iteration failed");
     } /* end if */
 
@@ -1623,9 +1620,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__delete_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    const H5B2_node_ptr_t *curr_node, void *parent, H5B2_remove_t op,
-    void *op_data)
+H5B2__delete_node(H5B2_hdr_t *hdr, uint16_t depth, const H5B2_node_ptr_t *curr_node,
+    void *parent, H5B2_remove_t op, void *op_data)
 {
     const H5AC_class_t *curr_node_class = NULL; /* Pointer to current node's class info */
     void *node = NULL;                  /* Pointers to current node */
@@ -1643,7 +1639,7 @@ H5B2__delete_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
         unsigned u;                    /* Local index */
 
         /* Lock the current B-tree node */
-        if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, (H5B2_node_ptr_t *)curr_node, depth, FALSE, H5AC__NO_FLAGS_SET)))   /* Casting away const OK -QAK */
+        if(NULL == (internal = H5B2__protect_internal(hdr, parent, (H5B2_node_ptr_t *)curr_node, depth, FALSE, H5AC__NO_FLAGS_SET)))   /* Casting away const OK -QAK */
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
 
         /* Set up information about current node */
@@ -1653,14 +1649,14 @@ H5B2__delete_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Descend into children */
         for(u = 0; u < internal->nrec + (unsigned)1; u++)
-            if(H5B2__delete_node(hdr, dxpl_id, (uint16_t)(depth - 1), &(internal->node_ptrs[u]), internal, op, op_data) < 0)
+            if(H5B2__delete_node(hdr, (uint16_t)(depth - 1), &(internal->node_ptrs[u]), internal, op, op_data) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTLIST, FAIL, "node descent failed")
     } /* end if */
     else {
         H5B2_leaf_t *leaf;             /* Pointer to leaf node */
 
         /* Lock the current B-tree node */
-        if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, (H5B2_node_ptr_t *)curr_node, FALSE, H5AC__NO_FLAGS_SET)))     /* Casting away const OK -QAK */
+        if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, (H5B2_node_ptr_t *)curr_node, FALSE, H5AC__NO_FLAGS_SET)))     /* Casting away const OK -QAK */
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
         /* Set up information about current node */
@@ -1683,7 +1679,7 @@ H5B2__delete_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
 done:
     /* Unlock & delete current node */
-    if(node && H5AC_unprotect(hdr->f, dxpl_id, curr_node_class, curr_node->addr, node, (unsigned)(H5AC__DELETED_FLAG | (hdr->swmr_write ? 0 : H5AC__FREE_FILE_SPACE_FLAG))) < 0)
+    if(node && H5AC_unprotect(hdr->f, curr_node_class, curr_node->addr, node, (unsigned)(H5AC__DELETED_FLAG | (hdr->swmr_write ? 0 : H5AC__FREE_FILE_SPACE_FLAG))) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1704,8 +1700,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__node_size(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    const H5B2_node_ptr_t *curr_node, void *parent, hsize_t *btree_size)
+H5B2__node_size(H5B2_hdr_t *hdr, uint16_t depth, const H5B2_node_ptr_t *curr_node,
+    void *parent, hsize_t *btree_size)
 {
     H5B2_internal_t 	*internal = NULL;     	/* Pointer to internal node */
     herr_t 		ret_value = SUCCEED;  	/* Iterator return value */
@@ -1719,7 +1715,7 @@ H5B2__node_size(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
     HDassert(depth > 0);
 
     /* Lock the current B-tree node */
-    if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, (H5B2_node_ptr_t *)curr_node, depth, FALSE, H5AC__READ_ONLY_FLAG)))     /* Casting away const OK -QAK */
+    if(NULL == (internal = H5B2__protect_internal(hdr, parent, (H5B2_node_ptr_t *)curr_node, depth, FALSE, H5AC__READ_ONLY_FLAG)))     /* Casting away const OK -QAK */
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
 
     /* Recursively descend into child nodes, if we are above the "twig" level in the B-tree */
@@ -1728,7 +1724,7 @@ H5B2__node_size(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Descend into children */
         for(u = 0; u < internal->nrec + (unsigned)1; u++)
-            if(H5B2__node_size(hdr, dxpl_id, (uint16_t)(depth - 1), &(internal->node_ptrs[u]), internal, btree_size) < 0)
+            if(H5B2__node_size(hdr, (uint16_t)(depth - 1), &(internal->node_ptrs[u]), internal, btree_size) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTLIST, FAIL, "node iteration failed")
     } /* end if */
     else /* depth is 1: count all the leaf nodes from this node */
@@ -1738,7 +1734,7 @@ H5B2__node_size(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
     *btree_size += hdr->node_size;
 
 done:
-    if(internal && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node->addr, internal, H5AC__NO_FLAGS_SET) < 0)
+    if(internal && H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node->addr, internal, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1791,7 +1787,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__update_flush_depend(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned depth,
+H5B2__update_flush_depend(H5B2_hdr_t *hdr, unsigned depth,
     const H5B2_node_ptr_t *node_ptr, void *old_parent, void *new_parent)
 {
     const H5AC_class_t *child_class;    /* Pointer to child node's class info */
@@ -1822,7 +1818,7 @@ H5B2__update_flush_depend(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned depth,
             H5B2_internal_t *child_int;
 
             /* Protect child */
-            if(NULL == (child_int = H5B2__protect_internal(hdr, dxpl_id, new_parent, (H5B2_node_ptr_t *)node_ptr, (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))      /* Casting away const OK -QAK */
+            if(NULL == (child_int = H5B2__protect_internal(hdr, new_parent, (H5B2_node_ptr_t *)node_ptr, (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))      /* Casting away const OK -QAK */
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
             child_class = H5AC_BT2_INT;
             child = child_int;
@@ -1838,7 +1834,7 @@ H5B2__update_flush_depend(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned depth,
             H5B2_leaf_t *child_leaf;
 
             /* Protect child */
-            if(NULL == (child_leaf = H5B2__protect_leaf(hdr, dxpl_id, new_parent, (H5B2_node_ptr_t *)node_ptr, FALSE, H5AC__NO_FLAGS_SET)))    /* Casting away const OK -QAK */
+            if(NULL == (child_leaf = H5B2__protect_leaf(hdr, new_parent, (H5B2_node_ptr_t *)node_ptr, FALSE, H5AC__NO_FLAGS_SET)))    /* Casting away const OK -QAK */
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
             child_class = H5AC_BT2_LEAF;
             child = child_leaf;
@@ -1868,7 +1864,7 @@ H5B2__update_flush_depend(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned depth,
 done:
     /* Unprotect the child */
     if(child)
-        if(H5AC_unprotect(hdr->f, dxpl_id, child_class, node_ptr->addr, child, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_unprotect(hdr->f, child_class, node_ptr->addr, child, H5AC__NO_FLAGS_SET) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1889,7 +1885,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5B2__update_child_flush_depends(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned depth,
+H5B2__update_child_flush_depends(H5B2_hdr_t *hdr, unsigned depth,
     const H5B2_node_ptr_t *node_ptrs, unsigned start_idx, unsigned end_idx, 
     void *old_parent, void *new_parent)
 {
@@ -1909,7 +1905,7 @@ H5B2__update_child_flush_depends(H5B2_hdr_t *hdr, hid_t dxpl_id, unsigned depth,
     /* Loop over children */
     for(u = start_idx; u < end_idx; u++)
         /* Update parent for children */
-        if(H5B2__update_flush_depend(hdr, dxpl_id, depth - 1, &node_ptrs[u], old_parent, new_parent) < 0)
+        if(H5B2__update_flush_depend(hdr, depth - 1, &node_ptrs[u], old_parent, new_parent) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child node to new parent")
 
 done:
diff --git a/src/H5B2internal.c b/src/H5B2internal.c
index e74ae59..95ed769 100644
--- a/src/H5B2internal.c
+++ b/src/H5B2internal.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -58,8 +56,7 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5B2__shadow_internal(H5B2_internal_t *internal, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr);
+static herr_t H5B2__shadow_internal(H5B2_internal_t *internal, H5B2_node_ptr_t *curr_node_ptr);
 
 
 /*********************/
@@ -96,8 +93,8 @@ H5FL_DEFINE(H5B2_internal_t);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__create_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent,
-    H5B2_node_ptr_t *node_ptr, uint16_t depth)
+H5B2__create_internal(H5B2_hdr_t *hdr, void *parent, H5B2_node_ptr_t *node_ptr,
+    uint16_t depth)
 {
     H5B2_internal_t *internal = NULL;   /* Pointer to new internal node created */
     hbool_t inserted = FALSE;           /* Whether the internal node was inserted into cache */
@@ -141,17 +138,17 @@ H5B2__create_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent,
     internal->shadow_epoch = hdr->shadow_epoch;
 
     /* Allocate space on disk for the internal node */
-    if(HADDR_UNDEF == (node_ptr->addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)hdr->node_size)))
+    if(HADDR_UNDEF == (node_ptr->addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, (hsize_t)hdr->node_size)))
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for B-tree internal node")
 
     /* Cache the new B-tree node */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_BT2_INT, node_ptr->addr, internal, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_BT2_INT, node_ptr->addr, internal, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't add B-tree internal node to cache")
     inserted = TRUE;
 
     /* Add internal node as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, internal) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, internal) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSET, FAIL, "unable to add v2 B-tree node as child of proxy")
         internal->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -165,7 +162,7 @@ done:
                     HDONE_ERROR(H5E_BTREE, H5E_CANTREMOVE, FAIL, "unable to remove v2 B-tree internal node from cache")
 
             /* Release internal node's disk space */
-            if(H5F_addr_defined(node_ptr->addr) && H5MF_xfree(hdr->f, H5FD_MEM_BTREE, dxpl_id, node_ptr->addr, (hsize_t)hdr->node_size) < 0)
+            if(H5F_addr_defined(node_ptr->addr) && H5MF_xfree(hdr->f, H5FD_MEM_BTREE, node_ptr->addr, (hsize_t)hdr->node_size) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to release file space for v2 B-tree internal node")
 
             /* Destroy internal node */
@@ -192,8 +189,8 @@ done:
  *-------------------------------------------------------------------------
  */
 H5B2_internal_t *
-H5B2__protect_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent,
-    H5B2_node_ptr_t *node_ptr, uint16_t depth, hbool_t shadow, unsigned flags)
+H5B2__protect_internal(H5B2_hdr_t *hdr, void *parent, H5B2_node_ptr_t *node_ptr,
+    uint16_t depth, hbool_t shadow, unsigned flags)
 {
     H5B2_internal_cache_ud_t udata;     /* User data to pass through to cache 'deserialize' callback */
     H5B2_internal_t *internal = NULL;   /* v2 B-tree internal node */
@@ -218,20 +215,20 @@ H5B2__protect_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent,
     udata.depth = depth;
 
     /* Protect the internal node */
-    if(NULL == (internal = (H5B2_internal_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_BT2_INT, node_ptr->addr, &udata, flags)))
+    if(NULL == (internal = (H5B2_internal_t *)H5AC_protect(hdr->f, H5AC_BT2_INT, node_ptr->addr, &udata, flags)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, NULL, "unable to protect B-tree internal node")
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == internal->top_proxy) {
         /* Add internal node as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, internal) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, internal) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSET, NULL, "unable to add v2 B-tree internal node as child of proxy")
         internal->top_proxy = hdr->top_proxy;
     } /* end if */
 
     /* Shadow the node, if requested */
     if(shadow)
-        if(H5B2__shadow_internal(internal, dxpl_id, node_ptr) < 0)
+        if(H5B2__shadow_internal(internal, node_ptr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCOPY, NULL, "unable to shadow internal node")
 
     /* Set return value */
@@ -250,7 +247,7 @@ done:
             } /* end if */
 
             /* Unprotect internal node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, node_ptr->addr, internal, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, node_ptr->addr, internal, H5AC__NO_FLAGS_SET) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, NULL, "unable to unprotect v2 B-tree internal node, address = %llu", (unsigned long long)node_ptr->addr)
         } /* end if */
     } /* end if */
@@ -286,9 +283,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__neighbor_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_node_ptr_t *curr_node_ptr, void *neighbor_loc, H5B2_compare_t comp,
-    void *parent, void *udata, H5B2_found_t op, void *op_data)
+H5B2__neighbor_internal(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
+    void *neighbor_loc, H5B2_compare_t comp, void *parent, void *udata,
+    H5B2_found_t op, void *op_data)
 {
     H5B2_internal_t *internal;          /* Pointer to internal node */
     unsigned    idx = 0;                /* Location of record which matches key */
@@ -305,7 +302,7 @@ H5B2__neighbor_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
     HDassert(op);
 
     /* Lock current B-tree node */
-    if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (internal = H5B2__protect_internal(hdr, parent, curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
 
     /* Locate node pointer for child */
@@ -328,17 +325,17 @@ H5B2__neighbor_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
     /* Attempt to find neighboring record */
     if(depth > 1) {
-        if(H5B2__neighbor_internal(hdr, dxpl_id, (uint16_t)(depth - 1), &internal->node_ptrs[idx], neighbor_loc, comp, internal, udata, op, op_data) < 0)
+        if(H5B2__neighbor_internal(hdr, (uint16_t)(depth - 1), &internal->node_ptrs[idx], neighbor_loc, comp, internal, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "unable to find neighbor record in B-tree internal node")
     } /* end if */
     else {
-        if(H5B2__neighbor_leaf(hdr, dxpl_id, &internal->node_ptrs[idx], neighbor_loc, comp, internal, udata, op, op_data) < 0)
+        if(H5B2__neighbor_leaf(hdr, &internal->node_ptrs[idx], neighbor_loc, comp, internal, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "unable to find neighbor record in B-tree leaf node")
     } /* end else */
 
 done:
     /* Release the B-tree internal node */
-    if(internal && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr->addr, internal, H5AC__NO_FLAGS_SET) < 0)
+    if(internal && H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr->addr, internal, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release internal B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -359,9 +356,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__insert_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    unsigned *parent_cache_info_flags_ptr, H5B2_node_ptr_t *curr_node_ptr,
-    H5B2_nodepos_t curr_pos, void *parent, void *udata)
+H5B2__insert_internal(H5B2_hdr_t *hdr, uint16_t depth, unsigned *parent_cache_info_flags_ptr,
+    H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, void *parent,
+    void *udata)
 {
     H5B2_internal_t *internal = NULL;   /* Pointer to internal node */
     unsigned internal_flags = H5AC__NO_FLAGS_SET;
@@ -378,7 +375,7 @@ H5B2__insert_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock current B-tree node */
-    if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (internal = H5B2__protect_internal(hdr, parent, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
 
     /* Sanity check number of records */
@@ -415,35 +412,32 @@ H5B2__insert_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
             /* Attempt to redistribute records among children */
             if(idx == 0) {    /* Left-most child */
                 if(retries > 0 && (internal->node_ptrs[idx + 1].node_nrec < split_nrec)) {
-                    if(H5B2__redistribute2(hdr, dxpl_id, depth, internal, idx) < 0)
+                    if(H5B2__redistribute2(hdr, depth, internal, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__split1(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
+                    if(H5B2__split1(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split child node")
                 } /* end else */
             } /* end if */
             else if(idx == internal->nrec) { /* Right-most child */
                 if(retries > 0 && (internal->node_ptrs[idx - 1].node_nrec < split_nrec)) {
-                    if(H5B2__redistribute2(hdr, dxpl_id, depth, internal, (idx - 1)) < 0)
+                    if(H5B2__redistribute2(hdr, depth, internal, (idx - 1)) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__split1(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
+                    if(H5B2__split1(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split child node")
                 } /* end else */
             } /* end if */
             else { /* Middle child */
                 if(retries > 0 && ((internal->node_ptrs[idx + 1].node_nrec < split_nrec) ||
                             (internal->node_ptrs[idx - 1].node_nrec < split_nrec))) {
-                    if(H5B2__redistribute3(hdr, dxpl_id, depth, internal, &internal_flags, idx) < 0)
+                    if(H5B2__redistribute3(hdr, depth, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__split1(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
+                    if(H5B2__split1(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to split child node")
                 } /* end else */
             } /* end else */
@@ -477,11 +471,11 @@ H5B2__insert_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
     /* Attempt to insert node */
     if(depth > 1) {
-        if(H5B2__insert_internal(hdr, dxpl_id, (uint16_t)(depth - 1), &internal_flags, &internal->node_ptrs[idx], next_pos, internal, udata) < 0)
+        if(H5B2__insert_internal(hdr, (uint16_t)(depth - 1), &internal_flags, &internal->node_ptrs[idx], next_pos, internal, udata) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into B-tree internal node")
     } /* end if */
     else {
-        if(H5B2__insert_leaf(hdr, dxpl_id, &internal->node_ptrs[idx], next_pos, internal, udata) < 0)
+        if(H5B2__insert_leaf(hdr, &internal->node_ptrs[idx], next_pos, internal, udata) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into B-tree leaf node")
     } /* end else */
 
@@ -496,11 +490,11 @@ done:
     if(internal) {
         /* Shadow the node if doing SWMR writes */
         if(hdr->swmr_write && (internal_flags & H5AC__DIRTIED_FLAG))
-            if(H5B2__shadow_internal(internal, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_internal(internal, curr_node_ptr) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow internal B-tree node")
 
         /* Unprotect node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release internal B-tree node")
     } /* end if */
 
@@ -525,7 +519,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__update_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
+H5B2__update_internal(H5B2_hdr_t *hdr, uint16_t depth,
     unsigned *parent_cache_info_flags_ptr, H5B2_node_ptr_t *curr_node_ptr,
     H5B2_update_status_t *status, H5B2_nodepos_t curr_pos, void *parent,
     void *udata, H5B2_modify_t op, void *op_data)
@@ -546,7 +540,7 @@ H5B2__update_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock current B-tree node */
-    if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (internal = H5B2__protect_internal(hdr, parent, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
 
     /* Sanity check number of records */
@@ -593,11 +587,11 @@ H5B2__update_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
         /* Attempt to update record in child */
         if(depth > 1) {
-            if(H5B2__update_internal(hdr, dxpl_id, (uint16_t)(depth - 1), &internal_flags, &internal->node_ptrs[idx], status, next_pos, internal, udata, op, op_data) < 0)
+            if(H5B2__update_internal(hdr, (uint16_t)(depth - 1), &internal_flags, &internal->node_ptrs[idx], status, next_pos, internal, udata, op, op_data) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update record in internal B-tree node")
         } /* end if */
         else {
-            if(H5B2__update_leaf(hdr, dxpl_id, &internal->node_ptrs[idx], status, next_pos, internal, udata, op, op_data) < 0)
+            if(H5B2__update_leaf(hdr, &internal->node_ptrs[idx], status, next_pos, internal, udata, op, op_data) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update record in leaf B-tree node")
         } /* end else */
 
@@ -658,7 +652,7 @@ H5B2__update_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
                      */
                     if(could_split) {
                         /* Release the internal B-tree node */
-                        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
+                        if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
                             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release internal B-tree node")
                         internal = NULL;
 
@@ -668,7 +662,7 @@ H5B2__update_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
                 } /* end if */
 
                 /* Release the internal B-tree node */
-                if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
+                if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release internal B-tree node")
                 internal = NULL;
 
@@ -676,7 +670,7 @@ H5B2__update_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
                 *status = H5B2_UPDATE_INSERT_DONE;
 
                 /* Dodge sideways into inserting a record into this node */
-                if(H5B2__insert_internal(hdr, dxpl_id, depth, parent_cache_info_flags_ptr, curr_node_ptr, curr_pos, parent, udata) < 0)
+                if(H5B2__insert_internal(hdr, depth, parent_cache_info_flags_ptr, curr_node_ptr, curr_pos, parent, udata) < 0)
                     HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, FAIL, "unable to insert record into internal B-tree node")
                 break;
 
@@ -693,7 +687,7 @@ done:
         /* Check if we should shadow this node */
         if(hdr->swmr_write && (internal_flags & H5AC__DIRTIED_FLAG)) {
             /* Attempt to shadow the node if doing SWMR writes */
-            if(H5B2__shadow_internal(internal, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_internal(internal, curr_node_ptr) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow internal B-tree node")
 
             /* Change the state to "shadowed" if only modified currently */
@@ -703,7 +697,7 @@ done:
         } /* end if */
 
         /* Unprotect node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr->addr, internal, internal_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release internal B-tree node")
     } /* end if */
 
@@ -728,8 +722,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5B2__shadow_internal(H5B2_internal_t *internal, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr)
+H5B2__shadow_internal(H5B2_internal_t *internal, H5B2_node_ptr_t *curr_node_ptr)
 {
     H5B2_hdr_t *hdr;                    /* B-tree header */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -760,11 +753,11 @@ H5B2__shadow_internal(H5B2_internal_t *internal, hid_t dxpl_id,
          * shadowed node.  Remove it from cache but do not mark it free on disk.
          */
         /* Allocate space for the cloned node */
-        if(HADDR_UNDEF == (new_node_addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)hdr->node_size)))
+        if(HADDR_UNDEF == (new_node_addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, (hsize_t)hdr->node_size)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "unable to allocate file space to move B-tree node")
 
         /* Move the location of the node on the disk */
-        if(H5AC_move_entry(hdr->f, H5AC_BT2_INT, curr_node_ptr->addr, new_node_addr, dxpl_id) < 0)
+        if(H5AC_move_entry(hdr->f, H5AC_BT2_INT, curr_node_ptr->addr, new_node_addr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTMOVE, FAIL, "unable to move B-tree node")
         curr_node_ptr->addr = new_node_addr;
 
@@ -795,7 +788,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
+H5B2__remove_internal(H5B2_hdr_t *hdr, hbool_t *depth_decreased,
     void *swap_loc, void *swap_parent, uint16_t depth, H5AC_info_t *parent_cache_info,
     unsigned *parent_cache_info_flags_ptr, H5B2_nodepos_t curr_pos,
     H5B2_node_ptr_t *curr_node_ptr, void *udata, H5B2_remove_t op, void *op_data)
@@ -821,7 +814,7 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock current B-tree node */
-    if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent_cache_info, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (internal = H5B2__protect_internal(hdr, parent_cache_info, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
     internal_addr = curr_node_ptr->addr;
 
@@ -834,8 +827,7 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
             ((internal->node_ptrs[0].node_nrec + internal->node_ptrs[1].node_nrec) <= ((merge_nrec * 2) + 1))) {
 
         /* Merge children of root node */
-        if(H5B2__merge2(hdr, dxpl_id, depth, curr_node_ptr,
-                parent_cache_info_flags_ptr, internal, &internal_flags, 0) < 0)
+        if(H5B2__merge2(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, 0) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
 
         /* Let the cache know that the object is deleted */
@@ -849,7 +841,7 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
 
         /* Update flush dependency for child, if using SWMR */
         if(hdr->swmr_write)
-            if(H5B2__update_flush_depend(hdr, dxpl_id, depth, curr_node_ptr, internal, hdr) < 0)
+            if(H5B2__update_flush_depend(hdr, depth, curr_node_ptr, internal, hdr) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child node to new parent")
 
         /* Indicate that the level of the B-tree decreased */
@@ -874,7 +866,7 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
 
         /* Shadow the node if doing SWMR writes */
         if(hdr->swmr_write) {
-            if(H5B2__shadow_internal(internal, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_internal(internal, curr_node_ptr) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow internal node")
             internal_addr = curr_node_ptr->addr;
         } /* end if */
@@ -908,35 +900,32 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
              */
             if(idx == 0) {    /* Left-most child */
                 if(retries > 0 && (internal->node_ptrs[idx + 1].node_nrec > merge_nrec)) {
-                    if(H5B2__redistribute2(hdr, dxpl_id, depth, internal, idx) < 0)
+                    if(H5B2__redistribute2(hdr, depth, internal, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__merge2(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
+                    if(H5B2__merge2(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
                 } /* end else */
             } /* end if */
             else if(idx == internal->nrec) { /* Right-most child */
                 if(retries > 0 && (internal->node_ptrs[idx - 1].node_nrec > merge_nrec)) {
-                    if(H5B2__redistribute2(hdr, dxpl_id, depth, internal, (idx - 1)) < 0)
+                    if(H5B2__redistribute2(hdr, depth, internal, (idx - 1)) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__merge2(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, (idx - 1)) < 0)
+                    if(H5B2__merge2(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, (idx - 1)) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
                 } /* end else */
             } /* end if */
             else { /* Middle child */
                 if(retries > 0 && ((internal->node_ptrs[idx + 1].node_nrec > merge_nrec) ||
                             (internal->node_ptrs[idx - 1].node_nrec > merge_nrec))) {
-                    if(H5B2__redistribute3(hdr, dxpl_id, depth, internal, &internal_flags, idx) < 0)
+                    if(H5B2__redistribute3(hdr, depth, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__merge3(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
+                    if(H5B2__merge3(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
                 } /* end else */
             } /* end else */
@@ -964,7 +953,7 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
 
         /* Swap record to delete with record from leaf, if we are the last internal node */
         if(swap_loc && depth == 1)
-            if(H5B2__swap_leaf(hdr, dxpl_id, depth, internal, &internal_flags, idx, swap_loc) < 0)
+            if(H5B2__swap_leaf(hdr, depth, internal, &internal_flags, idx, swap_loc) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTSWAP, FAIL, "Can't swap records in B-tree")
 
         /* Set pointers for advancing to child node */
@@ -987,12 +976,12 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
 
     /* Attempt to remove record from child node */
     if(depth > 1) {
-        if(H5B2__remove_internal(hdr, dxpl_id, depth_decreased, swap_loc, swap_parent, (uint16_t)(depth - 1),
+        if(H5B2__remove_internal(hdr, depth_decreased, swap_loc, swap_parent, (uint16_t)(depth - 1),
                 new_cache_info, new_cache_info_flags_ptr, next_pos, new_node_ptr, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree internal node")
     } /* end if */
     else {
-        if(H5B2__remove_leaf(hdr, dxpl_id, new_node_ptr, next_pos, new_cache_info, udata, op, op_data) < 0)
+        if(H5B2__remove_leaf(hdr, new_node_ptr, next_pos, new_cache_info, udata, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree leaf node")
     } /* end else */
 
@@ -1010,7 +999,7 @@ H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, hbool_t *depth_decreased,
 
 done:
     /* Release the B-tree internal node */
-    if(internal && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, internal_addr, internal, internal_flags) < 0)
+    if(internal && H5AC_unprotect(hdr->f, H5AC_BT2_INT, internal_addr, internal, internal_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release internal B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1032,11 +1021,10 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    hbool_t *depth_decreased, void *swap_loc, void *swap_parent, uint16_t depth,
-    H5AC_info_t *parent_cache_info, unsigned *parent_cache_info_flags_ptr,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, hsize_t n,
-    H5B2_remove_t op, void *op_data)
+H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hbool_t *depth_decreased,
+    void *swap_loc, void *swap_parent, uint16_t depth, H5AC_info_t *parent_cache_info,
+    unsigned *parent_cache_info_flags_ptr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_nodepos_t curr_pos, hsize_t n, H5B2_remove_t op, void *op_data)
 {
     H5AC_info_t *new_cache_info;        /* Pointer to new cache info */
     unsigned *new_cache_info_flags_ptr = NULL;
@@ -1059,7 +1047,7 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock current B-tree node */
-    if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent_cache_info, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (internal = H5B2__protect_internal(hdr, parent_cache_info, curr_node_ptr, depth, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
     internal_addr = curr_node_ptr->addr;
     HDassert(internal->nrec == curr_node_ptr->node_nrec);
@@ -1075,8 +1063,7 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
         HDassert(depth == hdr->depth);
 
         /* Merge children of root node */
-        if(H5B2__merge2(hdr, dxpl_id, depth, curr_node_ptr,
-                parent_cache_info_flags_ptr, internal, &internal_flags, 0) < 0)
+        if(H5B2__merge2(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, 0) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
 
         /* Let the cache know that the object is deleted */
@@ -1090,7 +1077,7 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
 
         /* Update flush dependency for child, if using SWMR */
         if(hdr->swmr_write)
-            if(H5B2__update_flush_depend(hdr, dxpl_id, depth, curr_node_ptr, internal, hdr) < 0)
+            if(H5B2__update_flush_depend(hdr, depth, curr_node_ptr, internal, hdr) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUPDATE, FAIL, "unable to update child node to new parent")
 
         /* Indicate that the level of the B-tree decreased */
@@ -1116,7 +1103,7 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
 
         /* Shadow the node if doing SWMR writes */
         if(hdr->swmr_write) {
-            if(H5B2__shadow_internal(internal, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_internal(internal, curr_node_ptr) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow internal node")
             internal_addr = curr_node_ptr->addr;
         } /* end if */
@@ -1171,35 +1158,32 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
              */
             if(idx == 0) {    /* Left-most child */
                 if(retries > 0 && (internal->node_ptrs[idx + 1].node_nrec > merge_nrec)) {
-                    if(H5B2__redistribute2(hdr, dxpl_id, depth, internal, idx) < 0)
+                    if(H5B2__redistribute2(hdr, depth, internal, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__merge2(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
+                    if(H5B2__merge2(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
                 } /* end else */
             } /* end if */
             else if(idx == internal->nrec) { /* Right-most child */
                 if(retries > 0 && (internal->node_ptrs[idx - 1].node_nrec > merge_nrec)) {
-                    if(H5B2__redistribute2(hdr, dxpl_id, depth, internal, (idx - 1)) < 0)
+                    if(H5B2__redistribute2(hdr, depth, internal, (idx - 1)) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__merge2(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, (idx - 1)) < 0)
+                    if(H5B2__merge2(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, (idx - 1)) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
                 } /* end else */
             } /* end if */
             else { /* Middle child */
                 if(retries > 0 && ((internal->node_ptrs[idx + 1].node_nrec > merge_nrec) ||
                             (internal->node_ptrs[idx - 1].node_nrec > merge_nrec))) {
-                    if(H5B2__redistribute3(hdr, dxpl_id, depth, internal, &internal_flags, idx) < 0)
+                    if(H5B2__redistribute3(hdr, depth, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTREDISTRIBUTE, FAIL, "unable to redistribute child node records")
                 } /* end if */
                 else {
-                    if(H5B2__merge3(hdr, dxpl_id, depth, curr_node_ptr,
-                           parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
+                    if(H5B2__merge3(hdr, depth, curr_node_ptr, parent_cache_info_flags_ptr, internal, &internal_flags, idx) < 0)
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTSPLIT, FAIL, "unable to merge child node")
                 } /* end else */
             } /* end else */
@@ -1255,7 +1239,7 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
 
         /* Swap record to delete with record from leaf, if we are the last internal node */
         if(swap_loc && depth == 1)
-            if(H5B2__swap_leaf(hdr, dxpl_id, depth, internal, &internal_flags, idx, swap_loc) < 0)
+            if(H5B2__swap_leaf(hdr, depth, internal, &internal_flags, idx, swap_loc) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTSWAP, FAIL, "can't swap records in B-tree")
 
         /* Set pointers for advancing to child node */
@@ -1278,12 +1262,12 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
 
     /* Attempt to remove record from child node */
     if(depth > 1) {
-        if(H5B2__remove_internal_by_idx(hdr, dxpl_id, depth_decreased, swap_loc, swap_parent, (uint16_t)(depth - 1),
+        if(H5B2__remove_internal_by_idx(hdr, depth_decreased, swap_loc, swap_parent, (uint16_t)(depth - 1),
                 new_cache_info, new_cache_info_flags_ptr, new_node_ptr, next_pos, n, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree internal node")
     } /* end if */
     else {
-        if(H5B2__remove_leaf_by_idx(hdr, dxpl_id, new_node_ptr, next_pos, new_cache_info, (unsigned)n, op, op_data) < 0)
+        if(H5B2__remove_leaf_by_idx(hdr, new_node_ptr, next_pos, new_cache_info, (unsigned)n, op, op_data) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTDELETE, FAIL, "unable to remove record from B-tree leaf node")
     } /* end else */
 
@@ -1301,7 +1285,7 @@ H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
 
 done:
     /* Release the B-tree internal node */
-    if(internal && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, internal_addr, internal, internal_flags) < 0)
+    if(internal && H5AC_unprotect(hdr->f, H5AC_BT2_INT, internal_addr, internal, internal_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release internal B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5B2leaf.c b/src/H5B2leaf.c
index 4f8b8e6..54d40ea 100644
--- a/src/H5B2leaf.c
+++ b/src/H5B2leaf.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -59,8 +57,7 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5B2__shadow_leaf(H5B2_leaf_t *leaf, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr);
+static herr_t H5B2__shadow_leaf(H5B2_leaf_t *leaf, H5B2_node_ptr_t *curr_node_ptr);
 
 
 /*********************/
@@ -97,7 +94,7 @@ H5FL_DEFINE(H5B2_leaf_t);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__create_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent, H5B2_node_ptr_t *node_ptr)
+H5B2__create_leaf(H5B2_hdr_t *hdr, void *parent, H5B2_node_ptr_t *node_ptr)
 {
     H5B2_leaf_t *leaf = NULL;           /* Pointer to new leaf node created */
     hbool_t inserted = FALSE;           /* Whether the leaf node was inserted into cache */
@@ -132,17 +129,17 @@ H5B2__create_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent, H5B2_node_ptr_t
     leaf->shadow_epoch = hdr->shadow_epoch;
 
     /* Allocate space on disk for the leaf */
-    if(HADDR_UNDEF == (node_ptr->addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)hdr->node_size)))
+    if(HADDR_UNDEF == (node_ptr->addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, (hsize_t)hdr->node_size)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for B-tree leaf node")
 
     /* Cache the new B-tree node */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_BT2_LEAF, node_ptr->addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_BT2_LEAF, node_ptr->addr, leaf, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "can't add B-tree leaf to cache")
     inserted = TRUE;
 
     /* Add leaf node as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, leaf) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, leaf) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSET, FAIL, "unable to add v2 B-tree node as child of proxy")
         leaf->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -156,7 +153,7 @@ done:
                     HDONE_ERROR(H5E_BTREE, H5E_CANTREMOVE, FAIL, "unable to remove v2 B-tree leaf node from cache")
 
             /* Release leaf node's disk space */
-            if(H5F_addr_defined(node_ptr->addr) && H5MF_xfree(hdr->f, H5FD_MEM_BTREE, dxpl_id, node_ptr->addr, (hsize_t)hdr->node_size) < 0)
+            if(H5F_addr_defined(node_ptr->addr) && H5MF_xfree(hdr->f, H5FD_MEM_BTREE, node_ptr->addr, (hsize_t)hdr->node_size) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTFREE, FAIL, "unable to release file space for v2 B-tree leaf node")
 
             /* Destroy leaf node */
@@ -183,8 +180,8 @@ done:
  *-------------------------------------------------------------------------
  */
 H5B2_leaf_t *
-H5B2__protect_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent, 
-    H5B2_node_ptr_t *node_ptr, hbool_t shadow, unsigned flags)
+H5B2__protect_leaf(H5B2_hdr_t *hdr, void *parent, H5B2_node_ptr_t *node_ptr,
+    hbool_t shadow, unsigned flags)
 {
     H5B2_leaf_cache_ud_t udata;         /* User-data for callback */
     H5B2_leaf_t *leaf;                  /* v2 B-tree leaf node */
@@ -207,20 +204,20 @@ H5B2__protect_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent,
     udata.nrec = node_ptr->node_nrec;
 
     /* Protect the leaf node */
-    if(NULL == (leaf = (H5B2_leaf_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_BT2_LEAF, node_ptr->addr, &udata, flags)))
+    if(NULL == (leaf = (H5B2_leaf_t *)H5AC_protect(hdr->f, H5AC_BT2_LEAF, node_ptr->addr, &udata, flags)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, NULL, "unable to protect B-tree leaf node")
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == leaf->top_proxy) {
         /* Add leaf node as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, leaf) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, leaf) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTSET, NULL, "unable to add v2 B-tree leaf node as child of proxy")
         leaf->top_proxy = hdr->top_proxy;
     } /* end if */
 
     /* Shadow the node, if requested */
     if(shadow)
-        if(H5B2__shadow_leaf(leaf, dxpl_id, node_ptr) < 0)
+        if(H5B2__shadow_leaf(leaf, node_ptr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCOPY, NULL, "unable to shadow leaf node")
 
     /* Set return value */
@@ -239,7 +236,7 @@ done:
             } /* end if */
 
             /* Unprotect leaf node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, node_ptr->addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, node_ptr->addr, leaf, H5AC__NO_FLAGS_SET) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, NULL, "unable to unprotect v2 B-tree leaf node, address = %llu", (unsigned long long)node_ptr->addr)
         } /* end if */
     } /* end if */
@@ -275,7 +272,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__neighbor_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr,
+H5B2__neighbor_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
     void *neighbor_loc, H5B2_compare_t comp, void *parent, void *udata, H5B2_found_t op,
     void *op_data)
 {
@@ -293,7 +290,7 @@ H5B2__neighbor_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_p
     HDassert(op);
 
     /* Lock current B-tree node */
-    if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
     /* Locate node pointer for child */
@@ -328,7 +325,7 @@ H5B2__neighbor_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_p
 
 done:
     /* Release the B-tree leaf node */
-    if(leaf && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr->addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+    if(leaf && H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr->addr, leaf, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree leaf node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -349,7 +346,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__insert_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr,
+H5B2__insert_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
     H5B2_nodepos_t curr_pos, void *parent, void *udata)
 {
     H5B2_leaf_t *leaf;                  /* Pointer to leaf node */
@@ -366,7 +363,7 @@ H5B2__insert_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock current B-tree node */
-    if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
     /* Must have a leaf node with enough space to insert a record now */
@@ -433,11 +430,11 @@ done:
     if(leaf) {
         /* Shadow the node if doing SWMR writes */
         if(hdr->swmr_write && (leaf_flags & H5AC__DIRTIED_FLAG))
-            if(H5B2__shadow_leaf(leaf, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_leaf(leaf, curr_node_ptr) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow leaf B-tree node")
 
         /* Unprotect leaf node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr->addr, leaf, leaf_flags) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr->addr, leaf, leaf_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release leaf B-tree node")
     } /* end if */
 
@@ -462,7 +459,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__update_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr,
+H5B2__update_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
     H5B2_update_status_t *status, H5B2_nodepos_t curr_pos, void *parent,
     void *udata, H5B2_modify_t op, void *op_data)
 {
@@ -480,7 +477,7 @@ H5B2__update_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock current B-tree node */
-    if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
     /* Sanity check number of records */
@@ -583,7 +580,7 @@ done:
         /* Check if we should shadow this node */
         if(hdr->swmr_write && (leaf_flags & H5AC__DIRTIED_FLAG)) {
             /* Attempt to shadow the node if doing SWMR writes */
-            if(H5B2__shadow_leaf(leaf, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_leaf(leaf, curr_node_ptr) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow leaf B-tree node")
 
             /* Change the state to "shadowed" if only modified currently */
@@ -593,7 +590,7 @@ done:
         } /* end if */
 
         /* Unprotect leaf node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr->addr, leaf, leaf_flags) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr->addr, leaf, leaf_flags) < 0)
             HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release leaf B-tree node")
     } /* end if */
 
@@ -617,9 +614,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__swap_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr,
-    unsigned idx, void *swap_loc)
+H5B2__swap_leaf(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx, void *swap_loc)
 {
     const H5AC_class_t *child_class;    /* Pointer to child node's class info */
     haddr_t child_addr;                 /* Address of child node */
@@ -643,7 +639,7 @@ H5B2__swap_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
         child_class = H5AC_BT2_INT;
 
         /* Lock B-tree child nodes */
-        if(NULL == (child_internal = H5B2__protect_internal(hdr, dxpl_id, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (child_internal = H5B2__protect_internal(hdr, internal, &internal->node_ptrs[idx], (uint16_t)(depth - 1), FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree internal node")
         child_addr = internal->node_ptrs[idx].addr;
 
@@ -658,7 +654,7 @@ H5B2__swap_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
         child_class = H5AC_BT2_LEAF;
 
         /* Lock B-tree child node */
-        if(NULL == (child_leaf = H5B2__protect_leaf(hdr, dxpl_id, internal, &internal->node_ptrs[idx], FALSE, H5AC__NO_FLAGS_SET)))
+        if(NULL == (child_leaf = H5B2__protect_leaf(hdr, internal, &internal->node_ptrs[idx], FALSE, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
         child_addr = internal->node_ptrs[idx].addr;
 
@@ -685,7 +681,7 @@ H5B2__swap_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
 
 done:
     /* Unlock child node */
-    if(child && H5AC_unprotect(hdr->f, dxpl_id, child_class, child_addr, child, H5AC__DIRTIED_FLAG) < 0)
+    if(child && H5AC_unprotect(hdr->f, child_class, child_addr, child, H5AC__DIRTIED_FLAG) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree child node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -709,7 +705,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5B2__shadow_leaf(H5B2_leaf_t *leaf, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr)
+H5B2__shadow_leaf(H5B2_leaf_t *leaf, H5B2_node_ptr_t *curr_node_ptr)
 {
     H5B2_hdr_t *hdr;                    /* B-tree header */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -740,11 +736,11 @@ H5B2__shadow_leaf(H5B2_leaf_t *leaf, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_p
         * shadowed node.  Remove it from cache but do not mark it free on disk.
         */
         /* Allocate space for the cloned node */
-        if(HADDR_UNDEF == (new_node_addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)hdr->node_size)))
+        if(HADDR_UNDEF == (new_node_addr = H5MF_alloc(hdr->f, H5FD_MEM_BTREE, (hsize_t)hdr->node_size)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "unable to allocate file space to move B-tree node")
 
         /* Move the location of the old child on the disk */
-        if(H5AC_move_entry(hdr->f, H5AC_BT2_LEAF, curr_node_ptr->addr, new_node_addr, dxpl_id) < 0)
+        if(H5AC_move_entry(hdr->f, H5AC_BT2_LEAF, curr_node_ptr->addr, new_node_addr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTMOVE, FAIL, "unable to move B-tree node")
         curr_node_ptr->addr = new_node_addr;
 
@@ -775,7 +771,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__remove_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr,
+H5B2__remove_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
     H5B2_nodepos_t curr_pos, void *parent, void *udata, H5B2_remove_t op, void *op_data)
 {
     H5B2_leaf_t *leaf;                  /* Pointer to leaf node */
@@ -793,7 +789,7 @@ H5B2__remove_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock current B-tree node */
-    if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
     leaf_addr = curr_node_ptr->addr;
 
@@ -835,7 +831,7 @@ H5B2__remove_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr
     if(leaf->nrec > 0) {
         /* Shadow the node if doing SWMR writes */
         if(hdr->swmr_write) {
-            if(H5B2__shadow_leaf(leaf, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_leaf(leaf, curr_node_ptr) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow leaf node")
             leaf_addr = curr_node_ptr->addr;
         } /* end if */
@@ -862,7 +858,7 @@ H5B2__remove_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, H5B2_node_ptr_t *curr_node_ptr
 
 done:
     /* Release the B-tree leaf node */
-    if(leaf && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, leaf_addr, leaf, leaf_flags) < 0)
+    if(leaf && H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, leaf_addr, leaf, leaf_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release leaf B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -884,9 +880,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2__remove_leaf_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, void *parent,
-    unsigned idx, H5B2_remove_t op, void *op_data)
+H5B2__remove_leaf_by_idx(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_nodepos_t curr_pos, void *parent, unsigned idx, H5B2_remove_t op,
+    void *op_data)
 {
     H5B2_leaf_t *leaf;                  /* Pointer to leaf node */
     haddr_t     leaf_addr = HADDR_UNDEF;  /* Leaf address on disk */
@@ -901,7 +897,7 @@ H5B2__remove_leaf_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
     HDassert(H5F_addr_defined(curr_node_ptr->addr));
 
     /* Lock B-tree leaf node */
-    if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
+    if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, curr_node_ptr, FALSE, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
     leaf_addr = curr_node_ptr->addr;
 
@@ -938,7 +934,7 @@ H5B2__remove_leaf_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
     if(leaf->nrec > 0) {
         /* Shadow the node if doing SWMR writes */
         if(hdr->swmr_write) {
-            if(H5B2__shadow_leaf(leaf, dxpl_id, curr_node_ptr) < 0)
+            if(H5B2__shadow_leaf(leaf, curr_node_ptr) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTCOPY, FAIL, "unable to shadow leaf node")
             leaf_addr = curr_node_ptr->addr;
         } /* end if */
@@ -965,7 +961,7 @@ H5B2__remove_leaf_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
 
 done:
     /* Release the B-tree leaf node */
-    if(leaf && H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, leaf_addr, leaf, leaf_flags) < 0)
+    if(leaf && H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, leaf_addr, leaf, leaf_flags) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release leaf B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5B2module.h b/src/H5B2module.h
index 0fc30a5..35c982c 100644
--- a/src/H5B2module.h
+++ b/src/H5B2module.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5B2pkg.h b/src/H5B2pkg.h
index 71fdfde..552cebb 100644
--- a/src/H5B2pkg.h
+++ b/src/H5B2pkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -336,31 +334,29 @@ extern const H5B2_class_t *const H5B2_client_class_g[H5B2_NUM_BTREE_ID];
 /* Generic routines */
 H5_DLL herr_t H5B2__create_flush_depend(H5AC_info_t *parent_entry,
     H5AC_info_t *child_entry);
-H5_DLL herr_t H5B2__update_flush_depend(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    unsigned depth, const H5B2_node_ptr_t *node_ptr, void *old_parent,
-    void *new_parent);
+H5_DLL herr_t H5B2__update_flush_depend(H5B2_hdr_t *hdr, unsigned depth,
+    const H5B2_node_ptr_t *node_ptr, void *old_parent, void *new_parent);
 H5_DLL herr_t H5B2__destroy_flush_depend(H5AC_info_t *parent_entry,
     H5AC_info_t *child_entry);
 
 /* Internal node management routines */
-H5_DLL herr_t H5B2__split1(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_node_ptr_t *curr_node_ptr, unsigned *parent_cache_info_flags_ptr,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx);
-H5_DLL herr_t H5B2__redistribute2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
+H5_DLL herr_t H5B2__split1(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
+    unsigned *parent_cache_info_flags_ptr, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx);
+H5_DLL herr_t H5B2__redistribute2(H5B2_hdr_t *hdr, uint16_t depth,
     H5B2_internal_t *internal, unsigned idx);
-H5_DLL herr_t H5B2__redistribute3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx);
-H5_DLL herr_t H5B2__merge2(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_node_ptr_t *curr_node_ptr, unsigned *parent_cache_info_flags_ptr,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx);
-H5_DLL herr_t H5B2__merge3(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_node_ptr_t *curr_node_ptr, unsigned *parent_cache_info_flags_ptr,
+H5_DLL herr_t H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth,
     H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx);
+H5_DLL herr_t H5B2__merge2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
+    unsigned *parent_cache_info_flags_ptr, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx);
+H5_DLL herr_t H5B2__merge3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
+    unsigned *parent_cache_info_flags_ptr, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx);
 
 /* Routines for managing B-tree header info */
 H5_DLL H5B2_hdr_t *H5B2__hdr_alloc(H5F_t *f);
-H5_DLL haddr_t H5B2__hdr_create(H5F_t *f, hid_t dxpl_id,
-    const H5B2_create_t *cparam, void *ctx_udata);
+H5_DLL haddr_t H5B2__hdr_create(H5F_t *f, const H5B2_create_t *cparam, void *ctx_udata);
 H5_DLL herr_t H5B2__hdr_init(H5B2_hdr_t *hdr, const H5B2_create_t *cparam,
     void *ctx_udata, uint16_t depth);
 H5_DLL herr_t H5B2__hdr_incr(H5B2_hdr_t *hdr);
@@ -368,29 +364,26 @@ H5_DLL herr_t H5B2__hdr_decr(H5B2_hdr_t *hdr);
 H5_DLL herr_t H5B2__hdr_fuse_incr(H5B2_hdr_t *hdr);
 H5_DLL size_t H5B2__hdr_fuse_decr(H5B2_hdr_t *hdr);
 H5_DLL herr_t H5B2__hdr_dirty(H5B2_hdr_t *hdr);
-H5_DLL H5B2_hdr_t *H5B2__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t hdr_addr,
+H5_DLL H5B2_hdr_t *H5B2__hdr_protect(H5F_t *f, haddr_t hdr_addr,
     void *ctx_udata, unsigned flags);
-H5_DLL herr_t H5B2__hdr_unprotect(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    unsigned cache_flags);
-H5_DLL herr_t H5B2__hdr_delete(H5B2_hdr_t *hdr, hid_t dxpl_id);
+H5_DLL herr_t H5B2__hdr_unprotect(H5B2_hdr_t *hdr, unsigned cache_flags);
+H5_DLL herr_t H5B2__hdr_delete(H5B2_hdr_t *hdr);
 
 /* Routines for operating on leaf nodes */
-H5_DLL H5B2_leaf_t * H5B2__protect_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    void *parent, H5B2_node_ptr_t *node_ptr, hbool_t shadow, unsigned flags);
-H5_DLL herr_t H5B2__swap_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
-    H5B2_internal_t *internal, unsigned *internal_flags_ptr, unsigned idx,
-    void *swap_loc);
+H5_DLL H5B2_leaf_t * H5B2__protect_leaf(H5B2_hdr_t *hdr, void *parent,
+    H5B2_node_ptr_t *node_ptr, hbool_t shadow, unsigned flags);
+H5_DLL herr_t H5B2__swap_leaf(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
+    unsigned *internal_flags_ptr, unsigned idx, void *swap_loc);
 
 /* Routines for operating on internal nodes */
-H5_DLL H5B2_internal_t *H5B2__protect_internal(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    void *parent, H5B2_node_ptr_t *node_ptr, uint16_t depth, hbool_t shadow,
-    unsigned flags);
+H5_DLL H5B2_internal_t *H5B2__protect_internal(H5B2_hdr_t *hdr, void *parent,
+    H5B2_node_ptr_t *node_ptr, uint16_t depth, hbool_t shadow, unsigned flags);
 
 /* Routines for allocating nodes */
-H5_DLL herr_t H5B2__split_root(H5B2_hdr_t *hdr, hid_t dxpl_id);
-H5_DLL herr_t H5B2__create_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent,
+H5_DLL herr_t H5B2__split_root(H5B2_hdr_t *hdr);
+H5_DLL herr_t H5B2__create_leaf(H5B2_hdr_t *hdr, void *parent,
     H5B2_node_ptr_t *node_ptr);
-H5_DLL herr_t H5B2__create_internal(H5B2_hdr_t *hdr, hid_t dxpl_id, void *parent,
+H5_DLL herr_t H5B2__create_internal(H5B2_hdr_t *hdr, void *parent,
     H5B2_node_ptr_t *node_ptr, uint16_t depth);
 
 /* Routines for releasing structures */
@@ -399,74 +392,69 @@ H5_DLL herr_t H5B2__leaf_free(H5B2_leaf_t *l);
 H5_DLL herr_t H5B2__internal_free(H5B2_internal_t *i);
 
 /* Routines for inserting records */
-H5_DLL herr_t H5B2__insert(H5B2_hdr_t *hdr, hid_t dxpl_id, void *udata);
-H5_DLL herr_t H5B2__insert_internal(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    uint16_t depth, unsigned *parent_cache_info_flags_ptr,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, void *parent, void *udata);
-H5_DLL herr_t H5B2__insert_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, void *parent, void *udata);
+H5_DLL herr_t H5B2__insert(H5B2_hdr_t *hdr, void *udata);
+H5_DLL herr_t H5B2__insert_internal(H5B2_hdr_t *hdr, uint16_t depth,
+    unsigned *parent_cache_info_flags_ptr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_nodepos_t curr_pos, void *parent, void *udata);
+H5_DLL herr_t H5B2__insert_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_nodepos_t curr_pos, void *parent, void *udata);
 
 /* Routines for update records */
-H5_DLL herr_t H5B2__update_internal(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    uint16_t depth, unsigned *parent_cache_info_flags_ptr,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_update_status_t *status,
-    H5B2_nodepos_t curr_pos, void *parent, void *udata, H5B2_modify_t op,
-    void *op_data);
-H5_DLL herr_t H5B2__update_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_update_status_t *status,
-    H5B2_nodepos_t curr_pos, void *parent, void *udata, H5B2_modify_t op,
-    void *op_data);
+H5_DLL herr_t H5B2__update_internal(H5B2_hdr_t *hdr, uint16_t depth,
+    unsigned *parent_cache_info_flags_ptr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_update_status_t *status, H5B2_nodepos_t curr_pos, void *parent,
+    void *udata, H5B2_modify_t op, void *op_data);
+H5_DLL herr_t H5B2__update_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_update_status_t *status, H5B2_nodepos_t curr_pos, void *parent,
+    void *udata, H5B2_modify_t op, void *op_data);
 
 /* Routines for iterating over nodes/records */
-H5_DLL herr_t H5B2__iterate_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
+H5_DLL herr_t H5B2__iterate_node(H5B2_hdr_t *hdr, uint16_t depth,
     const H5B2_node_ptr_t *curr_node, void *parent, H5B2_operator_t op, void *op_data);
-H5_DLL herr_t H5B2__node_size(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    uint16_t depth, const H5B2_node_ptr_t *curr_node, void *parent,
-    hsize_t *op_data);
+H5_DLL herr_t H5B2__node_size(H5B2_hdr_t *hdr, uint16_t depth,
+    const H5B2_node_ptr_t *curr_node, void *parent, hsize_t *op_data);
 
 /* Routines for locating records */
 H5_DLL herr_t H5B2__locate_record(const H5B2_class_t *type, unsigned nrec,
     size_t *rec_off, const uint8_t *native, const void *udata, unsigned *idx, int *result);
-H5_DLL herr_t H5B2__neighbor_internal(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    uint16_t depth, H5B2_node_ptr_t *curr_node_ptr, void *neighbor_loc,
-    H5B2_compare_t comp, void *parent, void *udata, H5B2_found_t op,
-    void *op_data);
-H5_DLL herr_t H5B2__neighbor_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5B2__neighbor_internal(H5B2_hdr_t *hdr, uint16_t depth,
     H5B2_node_ptr_t *curr_node_ptr, void *neighbor_loc, H5B2_compare_t comp,
     void *parent, void *udata, H5B2_found_t op, void *op_data);
+H5_DLL herr_t H5B2__neighbor_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
+    void *neighbor_loc, H5B2_compare_t comp, void *parent, void *udata,
+    H5B2_found_t op, void *op_data);
 
 /* Routines for removing records */
-H5_DLL herr_t H5B2__remove_internal(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    hbool_t *depth_decreased, void *swap_loc, void *swap_parent, uint16_t depth,
-    H5AC_info_t *parent_cache_info, unsigned *parent_cache_info_flags_ptr,
-    H5B2_nodepos_t curr_pos, H5B2_node_ptr_t *curr_node_ptr, void *udata,
-    H5B2_remove_t op, void *op_data);
-H5_DLL herr_t H5B2__remove_leaf(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, void *parent,
-    void *udata, H5B2_remove_t op, void *op_data);
-H5_DLL herr_t H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5B2__remove_internal(H5B2_hdr_t *hdr, hbool_t *depth_decreased,
+    void *swap_loc, void *swap_parent, uint16_t depth, H5AC_info_t *parent_cache_info,
+        unsigned *parent_cache_info_flags_ptr, H5B2_nodepos_t curr_pos,
+        H5B2_node_ptr_t *curr_node_ptr, void *udata, H5B2_remove_t op,
+        void *op_data);
+H5_DLL herr_t H5B2__remove_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_nodepos_t curr_pos, void *parent, void *udata, H5B2_remove_t op,
+    void *op_data);
+H5_DLL herr_t H5B2__remove_internal_by_idx(H5B2_hdr_t *hdr, 
     hbool_t *depth_decreased, void *swap_loc, void *swap_parent, uint16_t depth,
     H5AC_info_t *parent_cache_info, unsigned *parent_cache_info_flags_ptr,
     H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, hsize_t n,
     H5B2_remove_t op, void *op_data);
-H5_DLL herr_t H5B2__remove_leaf_by_idx(H5B2_hdr_t *hdr, hid_t dxpl_id,
-    H5B2_node_ptr_t *curr_node_ptr, H5B2_nodepos_t curr_pos, void *parent,
-    unsigned idx, H5B2_remove_t op, void *op_data);
+H5_DLL herr_t H5B2__remove_leaf_by_idx(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
+    H5B2_nodepos_t curr_pos, void *parent, unsigned idx, H5B2_remove_t op,
+    void *op_data);
 
 /* Routines for deleting nodes */
-H5_DLL herr_t H5B2__delete_node(H5B2_hdr_t *hdr, hid_t dxpl_id, uint16_t depth,
+H5_DLL herr_t H5B2__delete_node(H5B2_hdr_t *hdr, uint16_t depth,
     const H5B2_node_ptr_t *curr_node, void *parent, H5B2_remove_t op,
     void *op_data);
 
 /* Debugging routines for dumping file structures */
-H5_DLL herr_t H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth, const H5B2_class_t *type, haddr_t obj_addr);
-H5_DLL herr_t H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth, const H5B2_class_t *type,
-    haddr_t hdr_addr, unsigned nrec, unsigned depth, haddr_t obj_addr);
-H5_DLL herr_t H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth, const H5B2_class_t *type,
-    haddr_t hdr_addr, unsigned nrec, haddr_t obj_addr);
+H5_DLL herr_t H5B2__hdr_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth, const H5B2_class_t *type, haddr_t obj_addr);
+H5_DLL herr_t H5B2__int_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth, const H5B2_class_t *type, haddr_t hdr_addr, unsigned nrec, unsigned depth,
+    haddr_t obj_addr);
+H5_DLL herr_t H5B2__leaf_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth, const H5B2_class_t *type, haddr_t hdr_addr, unsigned nrec, haddr_t obj_addr);
 
 /* Sanity checking routines */
 #ifdef H5B2_DEBUG
@@ -480,9 +468,9 @@ H5_DLL herr_t H5B2__assert_leaf2(const H5B2_hdr_t *hdr, const H5B2_leaf_t *leaf,
 /* Testing routines */
 #ifdef H5B2_TESTING
 H5_DLL herr_t H5B2_get_root_addr_test(H5B2_t *bt2, haddr_t *root_addr);
-H5_DLL int H5B2_get_node_depth_test(H5B2_t *bt2, hid_t dxpl_id, void *udata);
-H5_DLL herr_t H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id,
-    void *udata, H5B2_node_info_test_t *ninfo);
+H5_DLL int H5B2__get_node_depth_test(H5B2_t *bt2, void *udata);
+H5_DLL herr_t H5B2__get_node_info_test(H5B2_t *bt2, void *udata,
+    H5B2_node_info_test_t *ninfo);
 #endif /* H5B2_TESTING */
 
 #endif /* _H5B2pkg_H */
diff --git a/src/H5B2private.h b/src/H5B2private.h
index 161e25e..83a5272 100644
--- a/src/H5B2private.h
+++ b/src/H5B2private.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -127,34 +125,31 @@ typedef struct H5B2_t H5B2_t;
 /***************************************/
 /* Library-private Function Prototypes */
 /***************************************/
-H5_DLL H5B2_t *H5B2_create(H5F_t *f, hid_t dxpl_id, const H5B2_create_t *cparam,
+H5_DLL H5B2_t *H5B2_create(H5F_t *f, const H5B2_create_t *cparam,
     void *ctx_udata);
-H5_DLL H5B2_t *H5B2_open(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *ctx_udata);
+H5_DLL H5B2_t *H5B2_open(H5F_t *f, haddr_t addr, void *ctx_udata);
 H5_DLL herr_t H5B2_get_addr(const H5B2_t *bt2, haddr_t *addr/*out*/);
-H5_DLL herr_t H5B2_insert(H5B2_t *bt2, hid_t dxpl_id, void *udata);
-H5_DLL herr_t H5B2_iterate(H5B2_t *bt2, hid_t dxpl_id, H5B2_operator_t op,
-    void *op_data);
-H5_DLL htri_t H5B2_find(H5B2_t *bt2, hid_t dxpl_id, void *udata,
+H5_DLL herr_t H5B2_insert(H5B2_t *bt2, void *udata);
+H5_DLL herr_t H5B2_iterate(H5B2_t *bt2, H5B2_operator_t op, void *op_data);
+H5_DLL htri_t H5B2_find(H5B2_t *bt2, void *udata, H5B2_found_t op, void *op_data);
+H5_DLL herr_t H5B2_index(H5B2_t *bt2, H5_iter_order_t order, hsize_t idx,
     H5B2_found_t op, void *op_data);
-H5_DLL herr_t H5B2_index(H5B2_t *bt2, hid_t dxpl_id, H5_iter_order_t order,
-    hsize_t idx, H5B2_found_t op, void *op_data);
-H5_DLL herr_t H5B2_neighbor(H5B2_t *bt2, hid_t dxpl_id, H5B2_compare_t range,
-    void *udata, H5B2_found_t op, void *op_data);
-H5_DLL herr_t H5B2_modify(H5B2_t *bt2, hid_t dxpl_id, void *udata,
-    H5B2_modify_t op, void *op_data);
-H5_DLL herr_t H5B2_update(H5B2_t *bt2, hid_t dxpl_id, void *udata,
-    H5B2_modify_t op, void *op_data);
-H5_DLL herr_t H5B2_remove(H5B2_t *b2, hid_t dxpl_id, void *udata,
-    H5B2_remove_t op, void *op_data);
-H5_DLL herr_t H5B2_remove_by_idx(H5B2_t *bt2, hid_t dxpl_id,
-    H5_iter_order_t order, hsize_t idx, H5B2_remove_t op, void *op_data);
+H5_DLL herr_t H5B2_neighbor(H5B2_t *bt2, H5B2_compare_t range, void *udata,
+    H5B2_found_t op, void *op_data);
+H5_DLL herr_t H5B2_modify(H5B2_t *bt2, void *udata, H5B2_modify_t op,
+    void *op_data);
+H5_DLL herr_t H5B2_update(H5B2_t *bt2, void *udata, H5B2_modify_t op,
+    void *op_data);
+H5_DLL herr_t H5B2_remove(H5B2_t *b2, void *udata, H5B2_remove_t op,
+    void *op_data);
+H5_DLL herr_t H5B2_remove_by_idx(H5B2_t *bt2, H5_iter_order_t order,
+    hsize_t idx, H5B2_remove_t op, void *op_data);
 H5_DLL herr_t H5B2_get_nrec(const H5B2_t *bt2, hsize_t *nrec);
-H5_DLL herr_t H5B2_size(H5B2_t *bt2, hid_t dxpl_id,
-    hsize_t *btree_size);
-H5_DLL herr_t H5B2_close(H5B2_t *bt2, hid_t dxpl_id);
-H5_DLL herr_t H5B2_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    void *ctx_udata, H5B2_remove_t op, void *op_data);
-H5_DLL herr_t H5B2_depend(H5B2_t *bt2, hid_t dxpl_id, H5AC_proxy_entry_t *parent);
+H5_DLL herr_t H5B2_size(H5B2_t *bt2, hsize_t *btree_size);
+H5_DLL herr_t H5B2_close(H5B2_t *bt2);
+H5_DLL herr_t H5B2_delete(H5F_t *f, haddr_t addr, void *ctx_udata,
+    H5B2_remove_t op, void *op_data);
+H5_DLL herr_t H5B2_depend(H5B2_t *bt2, H5AC_proxy_entry_t *parent);
 H5_DLL herr_t H5B2_patch_file(H5B2_t *fa, H5F_t *f);
 
 /* Statistics routines */
diff --git a/src/H5B2public.h b/src/H5B2public.h
index 43ec5d7..6e0b964 100644
--- a/src/H5B2public.h
+++ b/src/H5B2public.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5B2stat.c b/src/H5B2stat.c
index da721c6..5dd9cc2 100644
--- a/src/H5B2stat.c
+++ b/src/H5B2stat.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@hdfgroup.org>
@@ -112,7 +110,7 @@ H5B2_stat_info(H5B2_t *bt2, H5B2_stat_t *info)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_size(H5B2_t *bt2, hid_t dxpl_id, hsize_t *btree_size)
+H5B2_size(H5B2_t *bt2, hsize_t *btree_size)
 {
     H5B2_hdr_t  *hdr;                   /* Pointer to the B-tree header */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -139,7 +137,7 @@ H5B2_size(H5B2_t *bt2, hid_t dxpl_id, hsize_t *btree_size)
             *btree_size += hdr->node_size;
         else
             /* Iterate through nodes */
-            if(H5B2__node_size(hdr, dxpl_id, hdr->depth, &hdr->root, hdr, btree_size) < 0)
+            if(H5B2__node_size(hdr, hdr->depth, &hdr->root, hdr, btree_size) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTLIST, FAIL, "node iteration failed")
     } /* end if */
 
diff --git a/src/H5B2test.c b/src/H5B2test.c
index aec2aba..49fe3af 100644
--- a/src/H5B2test.c
+++ b/src/H5B2test.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
@@ -500,7 +498,7 @@ H5B2_get_root_addr_test(H5B2_t *bt2, haddr_t *root_addr)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5B2_get_node_info_test
+ * Function:	H5B2__get_node_info_test
  *
  * Purpose:	Determine information about a node holding a record in the B-tree
  *
@@ -513,8 +511,7 @@ H5B2_get_root_addr_test(H5B2_t *bt2, haddr_t *root_addr)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id, void *udata,
-    H5B2_node_info_test_t *ninfo)
+H5B2__get_node_info_test(H5B2_t *bt2, void *udata, H5B2_node_info_test_t *ninfo)
 {
     H5B2_hdr_t	*hdr;                   /* Pointer to the B-tree header */
     H5B2_node_ptr_t curr_node_ptr;      /* Node pointer info for current node */
@@ -524,7 +521,7 @@ H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id, void *udata,
     unsigned    idx;                    /* Location of record which matches key */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments. */
     HDassert(bt2);
@@ -556,7 +553,7 @@ H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id, void *udata,
         H5B2_node_ptr_t next_node_ptr;      /* Node pointer info for next node */
 
         /* Lock B-tree current node */
-        if(NULL == (internal = H5B2__protect_internal(hdr, dxpl_id, parent, &curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (internal = H5B2__protect_internal(hdr, parent, &curr_node_ptr, depth, FALSE, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree internal node")
 
         /* Unpin parent if necessary */
@@ -579,7 +576,7 @@ H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id, void *udata,
             next_node_ptr = internal->node_ptrs[idx];
 
             /* Unlock current node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             /* Keep track of parent if necessary */
@@ -591,7 +588,7 @@ H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id, void *udata,
         } /* end if */
         else {
             /* Unlock current node */
-            if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_unprotect(hdr->f, H5AC_BT2_INT, curr_node_ptr.addr, internal, H5AC__NO_FLAGS_SET) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
             /* Fill in information about the node */
@@ -610,7 +607,7 @@ H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id, void *udata,
         H5B2_leaf_t *leaf;          /* Pointer to leaf node in B-tree */
 
         /* Lock B-tree leaf node */
-        if(NULL == (leaf = H5B2__protect_leaf(hdr, dxpl_id, parent, &curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (leaf = H5B2__protect_leaf(hdr, parent, &curr_node_ptr, FALSE, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree leaf node")
 
         /* Unpin parent if necessary */
@@ -626,7 +623,7 @@ H5B2_get_node_info_test(H5B2_t *bt2, hid_t dxpl_id, void *udata,
             HGOTO_ERROR(H5E_BTREE, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
 
         /* Unlock current node */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_BT2_LEAF, curr_node_ptr.addr, leaf, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
         /* Indicate the depth that the record was found */
@@ -646,11 +643,11 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5B2_get_node_info_test() */
+} /* H5B2__get_node_info_test() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5B2_get_node_depth_test
+ * Function:	H5B2__get_node_depth_test
  *
  * Purpose:	Determine the depth of a node holding a record in the B-tree
  *
@@ -666,18 +663,18 @@ done:
  *-------------------------------------------------------------------------
  */
 int
-H5B2_get_node_depth_test(H5B2_t *bt2, hid_t dxpl_id, void *udata)
+H5B2__get_node_depth_test(H5B2_t *bt2, void *udata)
 {
     H5B2_node_info_test_t ninfo;        /* Node information */
     int		ret_value = -1;         /* Return information */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments. */
     HDassert(bt2);
 
     /* Get information abou the node */
-    if(H5B2_get_node_info_test(bt2, dxpl_id, udata, &ninfo) < 0)
+    if(H5B2__get_node_info_test(bt2, udata, &ninfo) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "error looking up node info")
 
     /* Set return value */
@@ -685,5 +682,5 @@ H5B2_get_node_depth_test(H5B2_t *bt2, hid_t dxpl_id, void *udata)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5B2_get_node_depth_test() */
+} /* H5B2__get_node_depth_test() */
 
diff --git a/src/H5Bcache.c b/src/H5Bcache.c
index b2be829..a0a75c8 100644
--- a/src/H5Bcache.c
+++ b/src/H5Bcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Bdbg.c b/src/H5Bdbg.c
index b22264d..5cad81b 100644
--- a/src/H5Bdbg.c
+++ b/src/H5Bdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -55,7 +53,7 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5B_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth,
+H5B_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth,
 	  const H5B_class_t *type, void *udata)
 {
     H5B_t	*bt = NULL;
@@ -92,7 +90,7 @@ H5B_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int f
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    if(NULL == (bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to load B-tree node")
 
     /*
@@ -151,7 +149,7 @@ H5B_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int f
     } /* end for */
 
 done:
-    if(bt && H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
+    if(bt && H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_BTREE, H5E_CANTUNPROTECT, FAIL, "unable to release B-tree node")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -174,7 +172,7 @@ done:
  */
 #ifdef H5B_DEBUG
 herr_t
-H5B__assert(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *type, void *udata)
+H5B__assert(H5F_t *f, haddr_t addr, const H5B_class_t *type, void *udata)
 {
     H5B_t	*bt = NULL;
     H5UC_t	*rc_shared;             /* Ref-counted shared info */
@@ -209,7 +207,7 @@ H5B__assert(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *type, void
     cache_udata.f = f;
     cache_udata.type = type;
     cache_udata.rc_shared = rc_shared;
-    bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG);
+    bt = (H5B_t *)H5AC_protect(f, H5AC_BT, addr, &cache_udata, H5AC__READ_ONLY_FLAG);
     HDassert(bt);
     shared = (H5B_shared_t *)H5UC_GET_OBJ(bt->rc_shared);
     HDassert(shared);
@@ -219,7 +217,7 @@ H5B__assert(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *type, void
     cur->level = bt->level;
     head = tail = cur;
 
-    status = H5AC_unprotect(f, dxpl_id, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET);
+    status = H5AC_unprotect(f, H5AC_BT, addr, bt, H5AC__NO_FLAGS_SET);
     HDassert(status >= 0);
     bt = NULL;    /* Make certain future references will be caught */
 
@@ -230,7 +228,7 @@ H5B__assert(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *type, void
      * test.
      */
     for(ncell = 0; cur; ncell++) {
-	bt = (H5B_t *)H5AC_protect(f, dxpl_id, H5AC_BT, cur->addr, &cache_udata, H5AC__READ_ONLY_FLAG);
+	bt = (H5B_t *)H5AC_protect(f, H5AC_BT, cur->addr, &cache_udata, H5AC__READ_ONLY_FLAG);
 	HDassert(bt);
 
 	/* Check node header */
@@ -270,7 +268,7 @@ H5B__assert(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *type, void
 	} /* end if */
 
 	/* Release node */
-	status = H5AC_unprotect(f, dxpl_id, H5AC_BT, cur->addr, bt, H5AC__NO_FLAGS_SET);
+	status = H5AC_unprotect(f, H5AC_BT, cur->addr, bt, H5AC__NO_FLAGS_SET);
 	HDassert(status >= 0);
         bt = NULL;    /* Make certain future references will be caught */
 
diff --git a/src/H5Bmodule.h b/src/H5Bmodule.h
index 6800b26..bc46752 100644
--- a/src/H5Bmodule.h
+++ b/src/H5Bmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Bpkg.h b/src/H5Bpkg.h
index fb93b8a..a451cab 100644
--- a/src/H5Bpkg.h
+++ b/src/H5Bpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -88,8 +86,7 @@ H5FL_EXTERN(H5B_t);
 /******************************/
 H5_DLL herr_t H5B__node_dest(H5B_t *bt);
 #ifdef H5B_DEBUG
-herr_t H5B__assert(H5F_t *f, hid_t dxpl_id, haddr_t addr, const H5B_class_t *type,
-			 void *udata);
+herr_t H5B__assert(H5F_t *f, haddr_t addr, const H5B_class_t *type, void *udata);
 #endif
 
 #endif /*_H5Bpkg_H*/
diff --git a/src/H5Bprivate.h b/src/H5Bprivate.h
index 02fb82c..270b4e6 100644
--- a/src/H5Bprivate.h
+++ b/src/H5Bprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -84,8 +82,8 @@ typedef enum H5B_dir_t {
 } H5B_dir_t;
 
 /* Define the operator callback function pointer for H5B_iterate() */
-typedef int (*H5B_operator_t)(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
-                                        const void *_rt_key, void *_udata);
+typedef int (*H5B_operator_t)(H5F_t *f, const void *_lt_key, haddr_t addr,
+        const void *_rt_key, void *_udata);
 
 /* Each B-tree has certain information that can be shared across all
  * the instances of nodes in that B-tree.
@@ -115,13 +113,13 @@ typedef struct H5B_class_t {
     H5B_subid_t id;					/*id as found in file*/
     size_t	sizeof_nkey;			/*size of native (memory) key*/
     H5UC_t *    (*get_shared)(const H5F_t*, const void*);    /*shared info for node */
-    herr_t	(*new_node)(H5F_t*, hid_t, H5B_ins_t, void*, void*, void*, haddr_t*);
+    herr_t	(*new_node)(H5F_t*, H5B_ins_t, void*, void*, void*, haddr_t*);
     int         (*cmp2)(void*, void*, void*);	    /*compare 2 keys */
     int         (*cmp3)(void*, void*, void*);	    /*compare 3 keys */
-    htri_t	(*found)(H5F_t*, hid_t, haddr_t, const void*, void*);
+    htri_t	(*found)(H5F_t*, haddr_t, const void*, void*);
 
     /* insert new data */
-    H5B_ins_t	(*insert)(H5F_t*, hid_t, haddr_t, void*, hbool_t*, void*, void*,
+    H5B_ins_t	(*insert)(H5F_t*, haddr_t, void*, hbool_t*, void*, void*,
 			  void*, hbool_t*, haddr_t*);
 
     /* min insert uses min leaf, not new(), similarily for max insert */
@@ -132,8 +130,7 @@ typedef struct H5B_class_t {
     H5B_dir_t   critical_key;
 
     /* remove existing data */
-    H5B_ins_t	(*remove)(H5F_t*, hid_t, haddr_t, void*, hbool_t*, void*, void*,
-			  hbool_t*);
+    H5B_ins_t	(*remove)(H5F_t*, haddr_t, void*, hbool_t*, void*, void*, hbool_t*);
 
     /* encode, decode, debug key values */
     herr_t	(*decode)(const H5B_shared_t*, const uint8_t*, void*);
@@ -157,26 +154,25 @@ typedef struct H5B_info_t {
 /***************************************/
 /* Library-private Function Prototypes */
 /***************************************/
-H5_DLL herr_t H5B_create(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    void *udata, haddr_t *addr_p/*out*/);
-H5_DLL herr_t H5B_find(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    haddr_t addr, void *udata);
-H5_DLL herr_t H5B_insert(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    haddr_t addr, void *udata);
-H5_DLL herr_t H5B_iterate(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    haddr_t addr, H5B_operator_t op, void *udata);
-H5_DLL herr_t H5B_get_info(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    haddr_t addr, H5B_info_t *bt_info, H5B_operator_t op, void *udata);
-H5_DLL herr_t H5B_remove(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    haddr_t addr, void *udata);
-H5_DLL herr_t H5B_delete(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    haddr_t addr, void *udata);
+H5_DLL herr_t H5B_create(H5F_t *f, const H5B_class_t *type, void *udata,
+    haddr_t *addr_p/*out*/);
+H5_DLL herr_t H5B_find(H5F_t *f, const H5B_class_t *type, haddr_t addr,
+    void *udata);
+H5_DLL herr_t H5B_insert(H5F_t *f, const H5B_class_t *type, haddr_t addr,
+    void *udata);
+H5_DLL herr_t H5B_iterate(H5F_t *f, const H5B_class_t *type, haddr_t addr,
+    H5B_operator_t op, void *udata);
+H5_DLL herr_t H5B_get_info(H5F_t *f, const H5B_class_t *type, haddr_t addr,
+    H5B_info_t *bt_info, H5B_operator_t op, void *udata);
+H5_DLL herr_t H5B_remove(H5F_t *f, const H5B_class_t *type, haddr_t addr,
+    void *udata);
+H5_DLL herr_t H5B_delete(H5F_t *f, const H5B_class_t *type, haddr_t addr,
+    void *udata);
 H5_DLL H5B_shared_t *H5B_shared_new(const H5F_t *f, const H5B_class_t *type,
     size_t sizeof_rkey);
 H5_DLL herr_t H5B_shared_free(void *_shared);
-H5_DLL herr_t H5B_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream,
+H5_DLL herr_t H5B_debug(H5F_t *f, haddr_t addr, FILE * stream,
     int indent, int fwidth, const H5B_class_t *type, void *udata);
-H5_DLL htri_t H5B_valid(H5F_t *f, hid_t dxpl_id, const H5B_class_t *type,
-    haddr_t addr);
+H5_DLL htri_t H5B_valid(H5F_t *f, const H5B_class_t *type, haddr_t addr);
 #endif /* _H5Bprivate_H */
 
diff --git a/src/H5Bpublic.h b/src/H5Bpublic.h
index 0016996..1764f61 100644
--- a/src/H5Bpublic.h
+++ b/src/H5Bpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5C.c b/src/H5C.c
index 2ba9f2d..729b267 100644
--- a/src/H5C.c
+++ b/src/H5C.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -83,6 +81,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5Cpkg.h"		/* Cache				*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"		/* Files				*/
 #include "H5FLprivate.h"	/* Free Lists                           */
@@ -112,12 +111,18 @@
 /* Local Prototypes */
 /********************/
 
-static herr_t H5C__auto_adjust_cache_size(H5F_t * f,
-                                          hid_t dxpl_id,
-                                          hbool_t write_permitted);
+static herr_t H5C__pin_entry_from_client(H5C_t *cache_ptr,
+    H5C_cache_entry_t *entry_ptr);
+
+static herr_t H5C__unpin_entry_real(H5C_t *cache_ptr,
+    H5C_cache_entry_t *entry_ptr, hbool_t update_rp);
+
+static herr_t H5C__unpin_entry_from_client(H5C_t *cache_ptr,
+    H5C_cache_entry_t *entry_ptr, hbool_t update_rp);
+
+static herr_t H5C__auto_adjust_cache_size(H5F_t *f, hbool_t write_permitted);
 
 static herr_t H5C__autoadjust__ageout(H5F_t * f,
-                                      hid_t dxpl_id,
                                       double hit_rate,
                                       enum H5C_resize_status * status_ptr,
                                       size_t * new_max_cache_size_ptr,
@@ -126,7 +131,6 @@ static herr_t H5C__autoadjust__ageout(H5F_t * f,
 static herr_t H5C__autoadjust__ageout__cycle_epoch_marker(H5C_t * cache_ptr);
 
 static herr_t H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t * f,
-                                                       hid_t dxpl_id,
                                                        hbool_t write_permitted);
 
 static herr_t H5C__autoadjust__ageout__insert_new_marker(H5C_t * cache_ptr);
@@ -138,16 +142,13 @@ static herr_t H5C__autoadjust__ageout__remove_excess_markers(H5C_t * cache_ptr);
 static herr_t H5C__flash_increase_cache_size(H5C_t * cache_ptr,
     size_t old_entry_size, size_t new_entry_size);
 
-static herr_t H5C_flush_invalidate_cache(H5F_t *f, hid_t dxpl_id, unsigned flags);
+static herr_t H5C__flush_invalidate_cache(H5F_t *f, unsigned flags);
 
-static herr_t H5C_flush_invalidate_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,
-    unsigned flags);
+static herr_t H5C_flush_invalidate_ring(H5F_t *f, H5C_ring_t ring, unsigned flags);
 
-static herr_t H5C_flush_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,
-    unsigned flags);
+static herr_t H5C__flush_ring(H5F_t *f, H5C_ring_t ring, unsigned flags);
 
 static void * H5C_load_entry(H5F_t *             f,
-                             hid_t               dxpl_id,
 #ifdef H5_HAVE_PARALLEL
                              hbool_t             coll_access,
 #endif /* H5_HAVE_PARALLEL */
@@ -159,9 +160,9 @@ static herr_t H5C__mark_flush_dep_dirty(H5C_cache_entry_t * entry);
 
 static herr_t H5C__mark_flush_dep_clean(H5C_cache_entry_t * entry);
 
-static herr_t H5C__serialize_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring);
-static herr_t H5C__serialize_single_entry(H5F_t *f, hid_t dxpl_id, 
-    H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr);
+static herr_t H5C__serialize_ring(H5F_t *f, H5C_ring_t ring);
+static herr_t H5C__serialize_single_entry(H5F_t *f, H5C_t *cache_ptr,
+    H5C_cache_entry_t *entry_ptr);
 
 static herr_t H5C__verify_len_eoa(H5F_t *f, const H5C_class_t * type,
     haddr_t addr, size_t *len, hbool_t actual);
@@ -368,6 +369,7 @@ H5C_create(size_t		      max_cache_size,
     cache_ptr->coll_write_list			= NULL;
 #endif /* H5_HAVE_PARALLEL */
 
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
     cache_ptr->cLRU_list_len			= 0;
     cache_ptr->cLRU_list_size			= (size_t)0;
     cache_ptr->cLRU_head_ptr			= NULL;
@@ -377,6 +379,7 @@ H5C_create(size_t		      max_cache_size,
     cache_ptr->dLRU_list_size			= (size_t)0;
     cache_ptr->dLRU_head_ptr			= NULL;
     cache_ptr->dLRU_tail_ptr			= NULL;
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
 
     cache_ptr->size_increase_possible		= FALSE;
     cache_ptr->flash_size_increase_possible     = FALSE;
@@ -729,7 +732,7 @@ H5C_free_tag_list_cb(void *_item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNUSED
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_prep_for_file_close(H5F_t *f, hid_t dxpl_id)
+H5C_prep_for_file_close(H5F_t *f)
 {
     H5C_t *     cache_ptr;
     hbool_t     image_generated = FALSE;        /* Whether a cache image was generated */
@@ -757,7 +760,7 @@ H5C_prep_for_file_close(H5F_t *f, hid_t dxpl_id)
     HDassert(cache_ptr->pl_len == 0);
 
     /* Prepare cache image */
-    if(H5C__prep_image_for_file_close(f, dxpl_id, &image_generated) < 0)
+    if(H5C__prep_image_for_file_close(f, &image_generated) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTCREATE, FAIL, "can't create cache image")
 
 #ifdef H5_HAVE_PARALLEL
@@ -798,7 +801,7 @@ H5C_prep_for_file_close(H5F_t *f, hid_t dxpl_id)
          *    during a flush, and thus avoid any resulting entrie dirties,
          *    deletions, insertion, or moves during the flush.
          */
-        if(H5C__serialize_cache(f, dxpl_id) < 0)
+        if(H5C__serialize_cache(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "serialization of the cache failed")
     } /* end if */
 #endif /* H5_HAVE_PARALLEL */
@@ -816,13 +819,6 @@ done:
  *              This function fails if any object are protected since the
  *              resulting file might not be consistent.
  *
- *		The primary_dxpl_id and secondary_dxpl_id parameters
- *		specify the dxpl_ids used on the first write occasioned
- *		by the destroy (primary_dxpl_id), and on all subsequent
- *		writes (secondary_dxpl_id).  This is useful in the metadata
- *		cache, but may not be needed elsewhere.  If so, just use the
- *		same dxpl_id for both parameters.
- *
  *		Note that *cache_ptr has been freed upon successful return.
  *
  * Return:      Non-negative on success/Negative on failure
@@ -833,7 +829,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_dest(H5F_t * f, hid_t dxpl_id)
+H5C_dest(H5F_t * f)
 {
     H5C_t * cache_ptr = f->shared->cache;
     herr_t ret_value = SUCCEED;      /* Return value */
@@ -851,12 +847,12 @@ H5C_dest(H5F_t * f, hid_t dxpl_id)
 #endif /* H5AC_DUMP_IMAGE_STATS_ON_CLOSE */
 
     /* Flush and invalidate all cache entries */
-    if(H5C_flush_invalidate_cache(f, dxpl_id, H5C__NO_FLAGS_SET) < 0 )
+    if(H5C__flush_invalidate_cache(f, H5C__NO_FLAGS_SET) < 0 )
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush cache")
 
     /* Generate & write cache image if requested */
     if(cache_ptr->image_ctl.generate_image)
-        if(H5C__generate_cache_image(f, dxpl_id, cache_ptr) < 0)
+        if(H5C__generate_cache_image(f, cache_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTCREATE, FAIL, "Can't generate metadata cache image")
 
     if(cache_ptr->slist_ptr != NULL) {
@@ -899,7 +895,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_evict(H5F_t * f, hid_t dxpl_id)
+H5C_evict(H5F_t * f)
 {
     herr_t ret_value = SUCCEED;      /* Return value */
 
@@ -909,7 +905,7 @@ H5C_evict(H5F_t * f, hid_t dxpl_id)
     HDassert(f);
 
     /* Flush and invalidate all cache entries except the pinned entries */
-    if(H5C_flush_invalidate_cache(f, dxpl_id, H5C__EVICT_ALLOW_LAST_PINS_FLAG) < 0 )
+    if(H5C__flush_invalidate_cache(f, H5C__EVICT_ALLOW_LAST_PINS_FLAG) < 0 )
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to evict entries in the cache")
 
 done:
@@ -932,8 +928,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_expunge_entry(H5F_t *f, hid_t dxpl_id, const H5C_class_t *type,
-    haddr_t addr, unsigned flags)
+H5C_expunge_entry(H5F_t *f, const H5C_class_t *type, haddr_t addr, unsigned flags)
 {
     H5C_t *		cache_ptr;
     H5C_cache_entry_t *	entry_ptr = NULL;
@@ -981,7 +976,7 @@ H5C_expunge_entry(H5F_t *f, hid_t dxpl_id, const H5C_class_t *type,
     /* Delete the entry from the skip list on destroy */
     flush_flags |= H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG;
 
-    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, flush_flags) < 0)
+    if(H5C__flush_single_entry(f, entry_ptr, flush_flags) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTEXPUNGE, FAIL, "can't flush entry")
 
 done:
@@ -1042,7 +1037,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_flush_cache(H5F_t *f, hid_t dxpl_id, unsigned flags)
+H5C_flush_cache(H5F_t *f, unsigned flags)
 {
 #if H5C_DO_SANITY_CHECKS
     int			i;
@@ -1109,7 +1104,7 @@ H5C_flush_cache(H5F_t *f, hid_t dxpl_id, unsigned flags)
     cache_ptr->flush_in_progress = TRUE;
 
     if(destroy) {
-        if(H5C_flush_invalidate_cache(f, dxpl_id, flags) < 0)
+        if(H5C__flush_invalidate_cache(f, flags) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "flush invalidate failed")
     } /* end if */
     else {
@@ -1130,14 +1125,14 @@ H5C_flush_cache(H5F_t *f, hid_t dxpl_id, unsigned flags)
 		    case H5C_RING_RDFSM:
                         /* Settle raw data FSM */
 			if(!cache_ptr->rdfsm_settled)
-			    if(H5MF_settle_raw_data_fsm(f, dxpl_id, &cache_ptr->rdfsm_settled) < 0)
+			    if(H5MF_settle_raw_data_fsm(f, &cache_ptr->rdfsm_settled) < 0)
                                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "RD FSM settle failed")
 			break;
 
 		    case H5C_RING_MDFSM:
                         /* Settle metadata FSM */
 			if(!cache_ptr->mdfsm_settled)
-			    if(H5MF_settle_meta_data_fsm(f, dxpl_id, &cache_ptr->mdfsm_settled) < 0)
+			    if(H5MF_settle_meta_data_fsm(f, &cache_ptr->mdfsm_settled) < 0)
                                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "MD FSM settle failed")
 			break;
 
@@ -1151,7 +1146,7 @@ H5C_flush_cache(H5F_t *f, hid_t dxpl_id, unsigned flags)
 		} /* end switch */
             } /* end if */
 
-	    if(H5C_flush_ring(f, dxpl_id, ring, flags) < 0)
+	    if(H5C__flush_ring(f, ring, flags) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "flush ring failed")
             ring++;
         } /* end while */
@@ -1189,19 +1184,10 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_flush_to_min_clean(H5F_t * f,
-		       hid_t    dxpl_id)
+H5C_flush_to_min_clean(H5F_t * f)
 {
     H5C_t *             cache_ptr;
     hbool_t		write_permitted;
-#if 0 /* modified code -- commented out for now */ /* JRM */
-    int			i;
-    int			flushed_entries_count = 0;
-    size_t		flushed_entries_size = 0;
-    size_t		space_needed = 0;
-    haddr_t	      * flushed_entries_list = NULL;
-    H5C_cache_entry_t *	entry_ptr = NULL;
-#endif /* JRM */
     herr_t		ret_value = SUCCEED;
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -1224,101 +1210,8 @@ H5C_flush_to_min_clean(H5F_t * f,
     if(!write_permitted)
         HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "cache write is not permitted!?!")
 
-#if 1 /* original code */
-    if(H5C__make_space_in_cache(f, dxpl_id, (size_t)0, write_permitted) < 0)
+    if(H5C__make_space_in_cache(f, (size_t)0, write_permitted) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "H5C__make_space_in_cache failed")
-#else /* modified code -- commented out for now */
-    if ( cache_ptr->max_cache_size > cache_ptr->index_size ) {
-
-        if ( ((cache_ptr->max_cache_size - cache_ptr->index_size) +
-               cache_ptr->cLRU_list_size) >= cache_ptr->min_clean_size ) {
-
-            space_needed = 0;
-
-        } else {
-
-            space_needed = cache_ptr->min_clean_size -
-                ((cache_ptr->max_cache_size - cache_ptr->index_size) +
-                 cache_ptr->cLRU_list_size);
-        }
-    } else {
-
-        if ( cache_ptr->min_clean_size <= cache_ptr->cLRU_list_size ) {
-
-           space_needed = 0;
-
-        } else {
-
-            space_needed = cache_ptr->min_clean_size -
-                           cache_ptr->cLRU_list_size;
-        }
-    }
-
-    if ( space_needed > 0 ) { /* we have work to do */
-
-        HDassert( cache_ptr->slist_len > 0 );
-
-        /* allocate an array to keep a list of the entries that we
-         * mark for flush.  We need this list to touch up the LRU
-         * list after the flush.
-         */
-        flushed_entries_list = (haddr_t *)H5MM_malloc(sizeof(haddr_t) *
-                                              (size_t)(cache_ptr->slist_len));
-        if(flushed_entries_list == NULL)
-            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for flushed entries list")
-
-        /* Scan the dirty LRU list from tail forward and mark sufficient
-         * entries to free up the necessary space.  Keep a list of the
-         * entries marked in the order in which they are encountered.
-         */
-        entry_ptr = cache_ptr->dLRU_tail_ptr;
-
-        while ( ( flushed_entries_size < space_needed ) &&
-                ( flushed_entries_count < cache_ptr->slist_len ) &&
-                ( entry_ptr != NULL ) )
-        {
-            HDassert( ! (entry_ptr->is_protected) );
-            HDassert( ! (entry_ptr->is_read_only) );
-            HDassert( entry_ptr->ro_ref_count == 0 );
-            HDassert( entry_ptr->is_dirty );
-            HDassert( entry_ptr->in_slist );
-
-            entry_ptr->flush_marker = TRUE;
-            flushed_entries_size += entry_ptr->size;
-            flushed_entries_list[flushed_entries_count] = entry_ptr->addr;
-            flushed_entries_count++;
-            entry_ptr = entry_ptr->aux_prev;
-        }
-
-        HDassert( flushed_entries_count <= cache_ptr->slist_len );
-        HDassert( flushed_entries_size >= space_needed );
-
-
-        /* Flush the marked entries */
-        if(H5C_flush_cache(f, primary_dxpl_id, secondary_dxpl_id, H5C__FLUSH_MARKED_ENTRIES_FLAG | H5C__FLUSH_IGNORE_PROTECTED_FLAG) < 0)
-            HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "H5C_flush_cache failed")
-
-        /* Now touch up the LRU list so as to place the flushed entries in
-         * the order they they would be in if we had flushed them in the
-         * order we encountered them in.
-         */
-
-        i = 0;
-        while ( i < flushed_entries_count )
-        {
-            H5C__SEARCH_INDEX_NO_STATS(cache_ptr, flushed_entries_list[i], \
-                                       entry_ptr, FAIL)
-
-	    /* At present, the above search must always succeed.  However,
-             * that may change.  Write the code so we need only remove the
-             * following assert in that event.
-             */
-            HDassert( entry_ptr != NULL );
-            H5C__FAKE_RP_FOR_MOST_RECENT_ACCESS(cache_ptr, entry_ptr, FAIL)
-            i++;
-        }
-    } /* if ( space_needed > 0 ) */
-#endif /* end modified code -- commented out for now */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1332,17 +1225,6 @@ done:
  *              exist on disk yet, but it must have an address and disk
  *              space reserved.
  *
- *		The primary_dxpl_id and secondary_dxpl_id parameters
- *		specify the dxpl_ids used on the first write occasioned
- *		by the insertion (primary_dxpl_id), and on all subsequent
- *		writes (secondary_dxpl_id).  This is useful in the
- *		metadata cache, but may not be needed elsewhere.  If so,
- *		just use the same dxpl_id for both parameters.
- *
- *		The primary_dxpl_id is the dxpl_id passed to the
- *		check_write_permitted function if such a function has been
- *		provided.
- *
  *		Observe that this function cannot occasion a read.
  *
  * Return:      Non-negative on success/Negative on failure
@@ -1354,14 +1236,12 @@ done:
  */
 herr_t
 H5C_insert_entry(H5F_t *             f,
-                 hid_t		     dxpl_id,
                  const H5C_class_t * type,
                  haddr_t 	     addr,
                  void *		     thing,
                  unsigned int        flags)
 {
     H5C_t               *cache_ptr;
-    H5P_genplist_t      *dxpl;
     H5AC_ring_t         ring = H5C_RING_UNDEFINED;
     hbool_t		insert_pinned;
     hbool_t             flush_last;
@@ -1404,13 +1284,8 @@ H5C_insert_entry(H5F_t *             f,
     insert_pinned      = ( (flags & H5C__PIN_ENTRY_FLAG) != 0 );
     flush_last         = ( (flags & H5C__FLUSH_LAST_FLAG) != 0 );
 
-    /* Get the dataset transfer property list */
-    if(NULL == (dxpl = (H5P_genplist_t *)H5I_object_verify(dxpl_id, H5I_GENPROP_LST)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADTYPE, FAIL, "not a property list")
-
     /* Get the ring type from the DXPL */
-    if((H5P_get(dxpl, H5AC_RING_NAME, &ring)) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "unable to query ring value")
+    ring = H5CX_get_ring();
 
     entry_ptr = (H5C_cache_entry_t *)thing;
 
@@ -1483,8 +1358,10 @@ H5C_insert_entry(H5F_t *             f,
     entry_ptr->next = NULL;
     entry_ptr->prev = NULL;
 
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
     entry_ptr->aux_next = NULL;
     entry_ptr->aux_prev = NULL;
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
 
 #ifdef H5_HAVE_PARALLEL
     entry_ptr->coll_next = NULL;
@@ -1513,7 +1390,7 @@ H5C_insert_entry(H5F_t *             f,
     entry_ptr->tag_info = NULL;
 
     /* Apply tag to newly inserted entry */
-    if(H5C__tag_entry(cache_ptr, entry_ptr, dxpl_id) < 0)
+    if(H5C__tag_entry(cache_ptr, entry_ptr) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, FAIL, "Cannot tag metadata entry")
     entry_tagged = TRUE;
 
@@ -1575,7 +1452,7 @@ H5C_insert_entry(H5F_t *             f,
          * no point in worrying about the third.
          */
 
-        if(H5C__make_space_in_cache(f, dxpl_id, space_needed, write_permitted) < 0)
+        if(H5C__make_space_in_cache(f, space_needed, write_permitted) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTINS, FAIL, "H5C__make_space_in_cache failed")
     } /* end if */
 
@@ -1604,21 +1481,12 @@ H5C_insert_entry(H5F_t *             f,
     H5C__UPDATE_STATS_FOR_INSERTION(cache_ptr, entry_ptr)
 
 #ifdef H5_HAVE_PARALLEL
-    /* Get the dataset transfer property list */
-    if(NULL == (dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-
     if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
         coll_access = (H5P_USER_TRUE == f->coll_md_read ? TRUE : FALSE);
 
-        if(!coll_access && H5P_FORCE_FALSE != f->coll_md_read) {
-            H5P_coll_md_read_flag_t prop_value;
-
-            /* Get the property value */
-            if(H5P_get(dxpl, H5_COLL_MD_READ_FLAG_NAME, &prop_value) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't get collective metadata access flag")
-            coll_access = (H5P_USER_TRUE == prop_value ? TRUE : FALSE);
-        } /* end if */
+        /* If not explicitly disabled, get the cmdr setting from the API context */
+        if(!coll_access && H5P_FORCE_FALSE != f->coll_md_read)
+            coll_access = H5CX_get_coll_metadata_read();
     } /* end if */
 
     entry_ptr->coll_access = coll_access;
@@ -2234,62 +2102,6 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5C_pin_entry_from_client()
- *
- * Purpose:	Internal routine to pin a cache entry from a client action.
- *
- * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Quincey Koziol
- *              3/26/09
- *
- * Changes:	Added sanity checks to clarify the circumstances under
- *		which an entry can be pinned.   JRM -- 4/27/14 
- *
- *-------------------------------------------------------------------------
- */
-#ifndef NDEBUG
-static herr_t
-H5C_pin_entry_from_client(H5C_t *	          cache_ptr,
-                        H5C_cache_entry_t * entry_ptr)
-#else
-static herr_t
-H5C_pin_entry_from_client(H5C_t H5_ATTR_UNUSED *	cache_ptr,
-                        H5C_cache_entry_t * entry_ptr)
-#endif
-{
-    herr_t              ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Sanity checks */
-    HDassert( cache_ptr );
-    HDassert( entry_ptr );
-    HDassert( entry_ptr->is_protected );
-
-    /* Check if the entry is already pinned */
-    if(entry_ptr->is_pinned) {
-        /* Check if the entry was pinned through an explicit pin from a client */
-        if(entry_ptr->pinned_from_client)
-            HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "Entry is already pinned")
-    } /* end if */
-    else {
-        entry_ptr->is_pinned = TRUE;
-
-        H5C__UPDATE_STATS_FOR_PIN(cache_ptr, entry_ptr)
-    } /* end else */
-
-    /* Mark that the entry was pinned through an explicit pin from a client */
-    entry_ptr->pinned_from_client = TRUE;
-
-done:
-
-    FUNC_LEAVE_NOAPI(ret_value)
-
-} /* H5C_pin_entry_from_client() */
-
-
-/*-------------------------------------------------------------------------
  * Function:    H5C_pin_protected_entry()
  *
  * Purpose:	Pin a protected cache entry.  The entry must be protected
@@ -2334,7 +2146,7 @@ H5C_pin_protected_entry(void *thing)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "Entry isn't protected")
 
     /* Pin the entry from a client */
-    if(H5C_pin_entry_from_client(cache_ptr, entry_ptr) < 0)
+    if(H5C__pin_entry_from_client(cache_ptr, entry_ptr) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "Can't pin entry by client")
 
 done:
@@ -2373,7 +2185,6 @@ done:
  */
 void *
 H5C_protect(H5F_t *		f,
-            hid_t	        dxpl_id,
             const H5C_class_t * type,
             haddr_t 	        addr,
             void *              udata,
@@ -2393,7 +2204,6 @@ H5C_protect(H5F_t *		f,
     size_t		empty_space;
     void *		thing;
     H5C_cache_entry_t *	entry_ptr;
-    H5P_genplist_t    * dxpl;    /* dataset transfer property list */
     void *		ret_value = NULL;       /* Return value */
 
     FUNC_ENTER_NOAPI(NULL)
@@ -2420,33 +2230,23 @@ H5C_protect(H5F_t *		f,
     /* Load the cache image, if requested */
     if(cache_ptr->load_image) {
         cache_ptr->load_image = FALSE;
-        if(H5C__load_cache_image(f, dxpl_id) < 0)
+        if(H5C__load_cache_image(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "Can't load cache image")
     } /* end if */
 
     read_only          = ( (flags & H5C__READ_ONLY_FLAG) != 0 );
     flush_last         = ( (flags & H5C__FLUSH_LAST_FLAG) != 0 );
 
-    /* Get the dataset transfer property list */
-    if(NULL == (dxpl = (H5P_genplist_t *)H5I_object_verify(dxpl_id, H5I_GENPROP_LST)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADTYPE, NULL, "not a property list")
-
-    /* Get the ring type from the DXPL */
-    if((H5P_get(dxpl, H5AC_RING_NAME, &ring)) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, NULL, "unable to query ring value")
+    /* Get the ring type from the API context */
+    ring = H5CX_get_ring();
 
 #ifdef H5_HAVE_PARALLEL
     if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
         coll_access = (H5P_USER_TRUE == f->coll_md_read ? TRUE : FALSE);
 
-        if(!coll_access && H5P_FORCE_FALSE != f->coll_md_read) {
-            H5P_coll_md_read_flag_t prop_value;
-
-            /* get the property value */
-            if(H5P_get(dxpl, H5_COLL_MD_READ_FLAG_NAME, &prop_value) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "Can't get collective metadata access flag")
-            coll_access = (H5P_USER_TRUE == prop_value ? TRUE : FALSE);
-        } /* end if */
+        /* If not explicitly disabled, get the cmdr setting from the API context */
+        if(!coll_access && H5P_FORCE_FALSE != f->coll_md_read)
+            coll_access = H5CX_get_coll_metadata_read();
     } /* end if */
 #endif /* H5_HAVE_PARALLEL */
 
@@ -2464,7 +2264,7 @@ H5C_protect(H5F_t *		f,
              * and replaces it with an entry deserialized from the 
              * image of the prefetched entry.
              */
-            if(H5C__deserialize_prefetched_entry(f, dxpl_id, cache_ptr, &entry_ptr, type, addr, udata) < 0)
+            if(H5C__deserialize_prefetched_entry(f, cache_ptr, &entry_ptr, type, addr, udata) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "can't deserialize prefetched entry")
 
             HDassert(entry_ptr->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
@@ -2505,7 +2305,7 @@ H5C_protect(H5F_t *		f,
                     HDmemcpy(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
                     if(0 == mpi_rank)
-                        if(H5C__generate_image(f, cache_ptr, entry_ptr, dxpl_id) < 0)
+                        if(H5C__generate_image(f, cache_ptr, entry_ptr) < 0)
                             HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, NULL, "can't generate entry's image")
                 } /* end if */
                 HDassert(entry_ptr->image_ptr);
@@ -2531,14 +2331,13 @@ H5C_protect(H5F_t *		f,
             haddr_t tag;              /* Tag value */
 
             /* The entry is already in the cache, but make sure that the tag value 
-               being passed in via dxpl is still legal. This will ensure that had
+               is still legal. This will ensure that had
                the entry NOT been in the cache, tagging was still set up correctly
                and it would have received a legal tag value after getting loaded
                from disk. */
 
-            /* Get the tag from the DXPL */
-            if((H5P_get(dxpl, H5AC_TAG_NAME, &tag)) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "unable to query property value")
+            /* Get the tag */
+            tag = H5CX_get_tag();
     
             if(H5C_verify_tag(entry_ptr->type->id, tag) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, NULL, "tag verification failed")
@@ -2555,7 +2354,7 @@ H5C_protect(H5F_t *		f,
 
         hit = FALSE;
 
-        if(NULL == (thing = H5C_load_entry(f, dxpl_id, 
+        if(NULL == (thing = H5C_load_entry(f, 
 #ifdef H5_HAVE_PARALLEL
                                            coll_access, 
 #endif /* H5_HAVE_PARALLEL */
@@ -2572,7 +2371,7 @@ H5C_protect(H5F_t *		f,
 #endif /* H5_HAVE_PARALLEL */
 
         /* Apply tag to newly protected entry */
-        if(H5C__tag_entry(cache_ptr, entry_ptr, dxpl_id) < 0)
+        if(H5C__tag_entry(cache_ptr, entry_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, NULL, "Cannot tag metadata entry")
 
         /* If the entry is very large, and we are configured to allow it,
@@ -2653,7 +2452,7 @@ H5C_protect(H5F_t *		f,
              * see no point in worrying about the fourth.
              */
 
-            if(H5C__make_space_in_cache(f, dxpl_id, space_needed, write_permitted) < 0 )
+            if(H5C__make_space_in_cache(f, space_needed, write_permitted) < 0 )
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTPROTECT, NULL, "H5C__make_space_in_cache failed")
         } /* end if */
 
@@ -2750,7 +2549,7 @@ H5C_protect(H5F_t *		f,
         if(cache_ptr->resize_enabled &&
              (cache_ptr->cache_accesses >= (cache_ptr->resize_ctl).epoch_length)) {
 
-            if(H5C__auto_adjust_cache_size(f, dxpl_id, write_permitted) < 0)
+            if(H5C__auto_adjust_cache_size(f, write_permitted) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTPROTECT, NULL, "Cache auto-resize failed")
         } /* end if */
 
@@ -2779,7 +2578,7 @@ H5C_protect(H5F_t *		f,
 		if(cache_ptr->index_size > cache_ptr->max_cache_size)
                     cache_ptr->cache_full = TRUE;
 
-                if(H5C__make_space_in_cache(f, dxpl_id, (size_t)0, write_permitted) < 0 )
+                if(H5C__make_space_in_cache(f, (size_t)0, write_permitted) < 0 )
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTPROTECT, NULL, "H5C__make_space_in_cache failed")
             }
         } /* end if */
@@ -3106,60 +2905,6 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5C_unpin_entry_from_client()
- *
- * Purpose:	Internal routine to unpin a cache entry from a client action.
- *
- * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Quincey Koziol
- *              3/24/09
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5C_unpin_entry_from_client(H5C_t *		  cache_ptr,
-                H5C_cache_entry_t *	  entry_ptr,
-                hbool_t update_rp)
-{
-    herr_t              ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Sanity checking */
-    HDassert( cache_ptr );
-    HDassert( entry_ptr );
-
-    /* Error checking (should be sanity checks?) */
-    if(!entry_ptr->is_pinned)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Entry isn't pinned")
-    if(!entry_ptr->pinned_from_client)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Entry wasn't pinned by cache client")
-
-    /* Check if the entry is not pinned from a flush dependency */
-    if(!entry_ptr->pinned_from_cache) {
-        /* If requested, update the replacement policy if the entry is not protected */
-        if(update_rp && !entry_ptr->is_protected)
-            H5C__UPDATE_RP_FOR_UNPIN(cache_ptr, entry_ptr, FAIL)
-
-        /* Unpin the entry now */
-        entry_ptr->is_pinned = FALSE;
-
-        /* Update the stats for an unpin operation */
-        H5C__UPDATE_STATS_FOR_UNPIN(cache_ptr, entry_ptr)
-    } /* end if */
-
-    /* Mark the entry as explicitly unpinned by the client */
-    entry_ptr->pinned_from_client = FALSE;
-
-done:
-
-    FUNC_LEAVE_NOAPI(ret_value)
-
-} /* H5C_unpin_entry_from_client() */
-
-
-/*-------------------------------------------------------------------------
  * Function:    H5C_unpin_entry()
  *
  * Purpose:	Unpin a cache entry.  The entry can be either protected or
@@ -3199,7 +2944,7 @@ H5C_unpin_entry(void *_entry_ptr)
 
 
     /* Unpin the entry */
-    if(H5C_unpin_entry_from_client(cache_ptr, entry_ptr, TRUE) < 0)
+    if(H5C__unpin_entry_from_client(cache_ptr, entry_ptr, TRUE) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Can't unpin entry from client")
 
 done:
@@ -3240,11 +2985,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_unprotect(H5F_t *		  f,
-              hid_t		  dxpl_id,
-              haddr_t		  addr,
-              void *		  thing,
-              unsigned int        flags)
+H5C_unprotect(H5F_t *f, haddr_t	addr, void *thing, unsigned flags)
 {
     H5C_t *             cache_ptr;
     hbool_t		deleted;
@@ -3321,11 +3062,11 @@ H5C_unprotect(H5F_t *		  f,
         /* Pin or unpin the entry as requested. */
         if(pin_entry) {
             /* Pin the entry from a client */
-            if(H5C_pin_entry_from_client(cache_ptr, entry_ptr) < 0)
+            if(H5C__pin_entry_from_client(cache_ptr, entry_ptr) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "Can't pin entry by client")
         } else if(unpin_entry) {
             /* Unpin the entry from a client */
-            if(H5C_unpin_entry_from_client(cache_ptr, entry_ptr, FALSE) < 0)
+            if(H5C__unpin_entry_from_client(cache_ptr, entry_ptr, FALSE) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Can't unpin entry by client")
         } /* end if */
     } else {
@@ -3417,11 +3158,11 @@ H5C_unprotect(H5F_t *		  f,
         /* Pin or unpin the entry as requested. */
         if(pin_entry) {
             /* Pin the entry from a client */
-            if(H5C_pin_entry_from_client(cache_ptr, entry_ptr) < 0)
+            if(H5C__pin_entry_from_client(cache_ptr, entry_ptr) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "Can't pin entry by client")
         } else if(unpin_entry) {
             /* Unpin the entry from a client */
-            if(H5C_unpin_entry_from_client(cache_ptr, entry_ptr, FALSE) < 0)
+            if(H5C__unpin_entry_from_client(cache_ptr, entry_ptr, FALSE) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Can't unpin entry by client")
         } /* end if */
 
@@ -3473,7 +3214,7 @@ H5C_unprotect(H5F_t *		  f,
             flush_flags |= H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG;
 
             HDassert(((!was_clean) || dirtied) == entry_ptr->in_slist);
-            if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, flush_flags) < 0)
+            if(H5C__flush_single_entry(f, entry_ptr, flush_flags) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPROTECT, FAIL, "Can't flush entry")
         } /* end if */
 #ifdef H5_HAVE_PARALLEL
@@ -3486,7 +3227,7 @@ H5C_unprotect(H5F_t *		  f,
             else if(test_entry_ptr != entry_ptr)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPROTECT, FAIL, "hash table contains multiple entries for addr?!?")
 
-            if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, H5C__FLUSH_CLEAR_ONLY_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
+            if(H5C__flush_single_entry(f, entry_ptr, H5C__FLUSH_CLEAR_ONLY_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPROTECT, FAIL, "Can't clear entry")
         } /* end else if */
 #endif /* H5_HAVE_PARALLEL */
@@ -4017,17 +3758,9 @@ H5C_destroy_flush_dependency(void *parent_thing, void * child_thing)
         HDassert(parent_entry->pinned_from_cache);
 
         /* Check if we should unpin parent entry now */
-        if(!parent_entry->pinned_from_client) {
-            /* Update the replacement policy if the entry is not protected */
-            if(!parent_entry->is_protected)
-                H5C__UPDATE_RP_FOR_UNPIN(cache_ptr, parent_entry, FAIL)
-
-            /* Unpin the entry now */
-            parent_entry->is_pinned = FALSE;
-
-            /* Update the stats for an unpin operation */
-            H5C__UPDATE_STATS_FOR_UNPIN(cache_ptr, parent_entry)
-        } /* end if */
+        if(!parent_entry->pinned_from_client)
+            if(H5C__unpin_entry_real(cache_ptr, parent_entry, TRUE) < 0)
+                HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "Can't unpin entry")
 
         /* Mark the entry as unpinned from the cache's action */
         parent_entry->pinned_from_cache = FALSE;
@@ -4064,8 +3797,7 @@ H5C_destroy_flush_dependency(void *parent_thing, void * child_thing)
         child_entry->flush_dep_parent_nalloc = 0;
     } /* end if */
     else if(child_entry->flush_dep_parent_nalloc > H5C_FLUSH_DEP_PARENT_INIT
-            && child_entry->flush_dep_nparents
-            <= (child_entry->flush_dep_parent_nalloc / 4)) {
+            && child_entry->flush_dep_nparents <= (child_entry->flush_dep_parent_nalloc / 4)) {
         if(NULL == (child_entry->flush_dep_parent = (H5C_cache_entry_t **)H5FL_BLK_REALLOC(parent, child_entry->flush_dep_parent, (child_entry->flush_dep_parent_nalloc / 4) * sizeof(H5C_cache_entry_t *))))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for flush dependency parent list")
         child_entry->flush_dep_parent_nalloc /= 4;
@@ -4080,6 +3812,138 @@ done:
 /**************************** Private Functions: *************************/
 /*************************************************************************/
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5C__pin_entry_from_client()
+ *
+ * Purpose:	Internal routine to pin a cache entry from a client action.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              3/26/09
+ *
+ *-------------------------------------------------------------------------
+ */
+#if H5C_COLLECT_CACHE_STATS
+static herr_t
+H5C__pin_entry_from_client(H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr)
+#else
+static herr_t
+H5C__pin_entry_from_client(H5C_t H5_ATTR_UNUSED *cache_ptr, H5C_cache_entry_t *entry_ptr)
+#endif
+{
+    herr_t ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity checks */
+    HDassert(cache_ptr);
+    HDassert(entry_ptr);
+    HDassert(entry_ptr->is_protected);
+
+    /* Check if the entry is already pinned */
+    if(entry_ptr->is_pinned) {
+        /* Check if the entry was pinned through an explicit pin from a client */
+        if(entry_ptr->pinned_from_client)
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTPIN, FAIL, "entry is already pinned")
+    } /* end if */
+    else {
+        entry_ptr->is_pinned = TRUE;
+
+        H5C__UPDATE_STATS_FOR_PIN(cache_ptr, entry_ptr)
+    } /* end else */
+
+    /* Mark that the entry was pinned through an explicit pin from a client */
+    entry_ptr->pinned_from_client = TRUE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C__pin_entry_from_client() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5C__unpin_entry_real()
+ *
+ * Purpose:	Internal routine to unpin a cache entry.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              1/6/18
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5C__unpin_entry_real(H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr,
+    hbool_t update_rp)
+{
+    herr_t ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity checking */
+    HDassert(cache_ptr);
+    HDassert(entry_ptr);
+    HDassert(entry_ptr->is_pinned);
+
+    /* If requested, update the replacement policy if the entry is not protected */
+    if(update_rp && !entry_ptr->is_protected)
+        H5C__UPDATE_RP_FOR_UNPIN(cache_ptr, entry_ptr, FAIL)
+
+    /* Unpin the entry now */
+    entry_ptr->is_pinned = FALSE;
+
+    /* Update the stats for an unpin operation */
+    H5C__UPDATE_STATS_FOR_UNPIN(cache_ptr, entry_ptr)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C__unpin_entry_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5C__unpin_entry_from_client()
+ *
+ * Purpose:	Internal routine to unpin a cache entry from a client action.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              3/24/09
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5C__unpin_entry_from_client(H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr,
+    hbool_t update_rp)
+{
+    herr_t ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity checking */
+    HDassert(cache_ptr);
+    HDassert(entry_ptr);
+
+    /* Error checking (should be sanity checks?) */
+    if(!entry_ptr->is_pinned)
+        HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "entry isn't pinned")
+    if(!entry_ptr->pinned_from_client)
+        HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "entry wasn't pinned by cache client")
+
+    /* Check if the entry is not pinned from a flush dependency */
+    if(!entry_ptr->pinned_from_cache)
+        if(H5C__unpin_entry_real(cache_ptr, entry_ptr, update_rp) < 0)
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTUNPIN, FAIL, "can't unpin entry")
+
+    /* Mark the entry as explicitly unpinned by the client */
+    entry_ptr->pinned_from_client = FALSE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5C__unpin_entry_from_client() */
+
 /*-------------------------------------------------------------------------
  *
  * Function:	H5C__auto_adjust_cache_size
@@ -4101,9 +3965,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__auto_adjust_cache_size(H5F_t * f,
-                            hid_t dxpl_id,
-                            hbool_t write_permitted)
+H5C__auto_adjust_cache_size(H5F_t *f, hbool_t write_permitted)
 {
     H5C_t *			cache_ptr = f->shared->cache;
     hbool_t			reentrant_call = FALSE;
@@ -4296,7 +4158,7 @@ H5C__auto_adjust_cache_size(H5F_t * f,
                     if(!cache_ptr->size_decrease_possible)
                         status = decrease_disabled;
                     else {
-                        if(H5C__autoadjust__ageout(f, dxpl_id, hit_rate, &status, &new_max_cache_size, write_permitted) < 0)
+                        if(H5C__autoadjust__ageout(f, hit_rate, &status, &new_max_cache_size, write_permitted) < 0)
                             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "ageout code failed")
                     } /* end else */
                 } /* end if */
@@ -4426,7 +4288,6 @@ done:
  */
 static herr_t
 H5C__autoadjust__ageout(H5F_t * f,
-                        hid_t dxpl_id,
                         double hit_rate,
                         enum H5C_resize_status * status_ptr,
                         size_t * new_max_cache_size_ptr,
@@ -4462,7 +4323,7 @@ H5C__autoadjust__ageout(H5F_t * f,
         if ( cache_ptr->max_cache_size > (cache_ptr->resize_ctl).min_size ){
 
             /* evict aged out cache entries if appropriate... */
-            if(H5C__autoadjust__ageout__evict_aged_out_entries(f, dxpl_id, write_permitted) < 0)
+            if(H5C__autoadjust__ageout__evict_aged_out_entries(f, write_permitted) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "error flushing aged out entries")
 
             /* ... and then reduce cache size if appropriate */
@@ -4633,16 +4494,6 @@ done:
  *		will be re-calculated, and will be enforced the next time
  *		we have to make space in the cache.
  *
- *              The primary_dxpl_id and secondary_dxpl_id parameters
- *              specify the dxpl_ids used depending on the value of
- *		*first_flush_ptr.  The idea is to use the primary_dxpl_id
- *		on the first write in a sequence of writes, and to use
- *		the secondary_dxpl_id on all subsequent writes.
- *
- *              This is useful in the metadata cache, but may not be
- *		needed elsewhere.  If so, just use the same dxpl_id for
- *		both parameters.
- *
  *              Observe that this function cannot occasion a read.
  *
  * Return:      Non-negative on success/Negative on failure.
@@ -4652,9 +4503,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t * f,
-                                                hid_t   dxpl_id,
-                                                hbool_t write_permitted)
+H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t *f, hbool_t write_permitted)
 {
     H5C_t *		cache_ptr = f->shared->cache;
     size_t		eviction_size_limit;
@@ -4727,7 +4576,7 @@ H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t * f,
                     cache_ptr->entries_removed_counter = 0;
                     cache_ptr->last_entry_removed_ptr  = NULL;
 
-                    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, H5C__NO_FLAGS_SET) < 0)
+                    if(H5C__flush_single_entry(f, entry_ptr, H5C__NO_FLAGS_SET) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry")
 
                     if(cache_ptr->entries_removed_counter > 1 || cache_ptr->last_entry_removed_ptr == prev_ptr)
@@ -4738,7 +4587,7 @@ H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t * f,
 
                 bytes_evicted += entry_ptr->size;
 
-                if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0 )
+                if(H5C__flush_single_entry(f, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0 )
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry")
             } /* end else-if */
             else {
@@ -4810,7 +4659,7 @@ H5C__autoadjust__ageout__evict_aged_out_entries(H5F_t * f,
             prev_ptr = entry_ptr->prev;
 
             if(!(entry_ptr->is_dirty) && !(entry_ptr->prefetched_dirty))
-                if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
+                if(H5C__flush_single_entry(f, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush clean entry")
 
             /* just skip the entry if it is dirty, as we can't do
@@ -5209,7 +5058,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5C_flush_invalidate_cache
+ * Function:    H5C__flush_invalidate_cache
  *
  * Purpose:	Flush and destroy the entries contained in the target
  *		cache.
@@ -5232,11 +5081,6 @@ done:
  *		until either the cache is empty, or the number of pinned
  *		entries stops decreasing on each pass.
  *
- *		The primary_dxpl_id and secondary_dxpl_id parameters
- *		specify the dxpl_ids used on the first write occasioned
- *		by the flush (primary_dxpl_id), and on all subsequent
- *		writes (secondary_dxpl_id).
- *
  * Return:      Non-negative on success/Negative on failure or if there was
  *		a request to flush all items and something was protected.
  *
@@ -5246,13 +5090,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C_flush_invalidate_cache(H5F_t *f, hid_t dxpl_id, unsigned flags)
+H5C__flush_invalidate_cache(H5F_t *f, unsigned flags)
 {
     H5C_t *		cache_ptr;
     H5C_ring_t		ring;
     herr_t		ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC
 
     HDassert(f);
     HDassert(f->shared);
@@ -5307,7 +5151,7 @@ H5C_flush_invalidate_cache(H5F_t *f, hid_t dxpl_id, unsigned flags)
      */
     ring = H5C_RING_USER;
     while(ring < H5C_RING_NTYPES) {
-        if(H5C_flush_invalidate_ring(f, dxpl_id, ring, flags) < 0)
+        if(H5C_flush_invalidate_ring(f, ring, flags) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "flush invalidate ring failed")
         ring++;
     } /* end while */
@@ -5351,7 +5195,7 @@ H5C_flush_invalidate_cache(H5F_t *f, hid_t dxpl_id, unsigned flags)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5C_flush_invalidate_cache() */
+} /* H5C__flush_invalidate_cache() */
 
 
 /*-------------------------------------------------------------------------
@@ -5391,8 +5235,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C_flush_invalidate_ring(H5F_t * f, hid_t dxpl_id, H5C_ring_t ring,
-    unsigned flags)
+H5C_flush_invalidate_ring(H5F_t * f, H5C_ring_t ring, unsigned flags)
 {
     H5C_t              *cache_ptr;
     hbool_t             restart_slist_scan;
@@ -5593,7 +5436,7 @@ H5C_flush_invalidate_ring(H5F_t * f, hid_t dxpl_id, H5C_ring_t ring,
                     protected_entries++;
                 } /* end if */
                 else if(entry_ptr->is_pinned) {
-                    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, H5C__DURING_FLUSH_FLAG) < 0)
+                    if(H5C__flush_single_entry(f, entry_ptr, H5C__DURING_FLUSH_FLAG) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "dirty pinned entry flush failed")
 
                     if(cache_ptr->slist_changed) {
@@ -5610,7 +5453,7 @@ H5C_flush_invalidate_ring(H5F_t * f, hid_t dxpl_id, H5C_ring_t ring,
                     } /* end if */
                 } /* end else-if */
                 else {
-                    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, (cooked_flags | H5C__DURING_FLUSH_FLAG | H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0)
+                    if(H5C__flush_single_entry(f, entry_ptr, (cooked_flags | H5C__DURING_FLUSH_FLAG | H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "dirty entry flush destroy failed")
 
                     if(cache_ptr->slist_changed) {
@@ -5714,7 +5557,7 @@ H5C_flush_invalidate_ring(H5F_t * f, hid_t dxpl_id, H5C_ring_t ring,
                      */
                     cache_ptr->entry_watched_for_removal = next_entry_ptr;
 
-                    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, (cooked_flags | H5C__DURING_FLUSH_FLAG | H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0)
+                    if(H5C__flush_single_entry(f, entry_ptr, (cooked_flags | H5C__DURING_FLUSH_FLAG | H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG)) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Entry flush destroy failed")
 
                     /* Restart the index list scan if necessary.  Must
@@ -5806,7 +5649,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5C_flush_ring
+ * Function:    H5C__flush_ring
  *
  * Purpose:	Flush the entries contained in the specified cache and 
  *		ring.  All entries in rings outside the specified ring
@@ -5829,8 +5672,8 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-herr_t
-H5C_flush_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,  unsigned flags)
+static herr_t
+H5C__flush_ring(H5F_t *f, H5C_ring_t ring, unsigned flags)
 {
     H5C_t * cache_ptr = f->shared->cache;
     hbool_t		flushed_entries_last_pass;
@@ -5849,7 +5692,7 @@ H5C_flush_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,  unsigned flags)
     int                 i;
     herr_t		ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC
 
     HDassert(cache_ptr);
     HDassert(cache_ptr->magic == H5C__H5C_T_MAGIC);
@@ -6025,7 +5868,7 @@ H5C_flush_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,  unsigned flags)
                     protected_entries++;
                 } /* end if */
                 else {
-                    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, (flags | H5C__DURING_FLUSH_FLAG)) < 0)
+                    if(H5C__flush_single_entry(f, entry_ptr, (flags | H5C__DURING_FLUSH_FLAG)) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush entry")
 
                     if(cache_ptr->slist_changed) {
@@ -6067,7 +5910,7 @@ H5C_flush_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,  unsigned flags)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5C_flush_ring() */
+} /* H5C__flush_ring() */
 
 
 /*-------------------------------------------------------------------------
@@ -6104,8 +5947,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__flush_single_entry(H5F_t *f, hid_t dxpl_id, H5C_cache_entry_t *entry_ptr,
-    unsigned flags)
+H5C__flush_single_entry(H5F_t *f, H5C_cache_entry_t *entry_ptr, unsigned flags)
 {
     H5C_t *	     	cache_ptr;              /* Cache for file */
     hbool_t		destroy;		/* external flag */
@@ -6239,7 +6081,7 @@ H5C__flush_single_entry(H5F_t *f, hid_t dxpl_id, H5C_cache_entry_t *entry_ptr,
             HDassert(!entry_ptr->prefetched);
 
             /* Generate the entry's image */
-            if(H5C__generate_image(f, cache_ptr, entry_ptr, dxpl_id) < 0)
+            if(H5C__generate_image(f, cache_ptr, entry_ptr) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "can't generate entry's image")
         } /* end if ( ! (entry_ptr->image_up_to_date) ) */
     } /* end if */
@@ -6275,17 +6117,23 @@ H5C__flush_single_entry(H5F_t *f, hid_t dxpl_id, H5C_cache_entry_t *entry_ptr,
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTINSERT, FAIL, "unable to insert skip list item")
             } /* end if */
             else
+            {
 #endif /* H5_HAVE_PARALLEL */
 
-            if(entry_ptr->prefetched) {
-                HDassert(entry_ptr->type->id == H5AC_PREFETCHED_ENTRY_ID);
-                mem_type = cache_ptr->class_table_ptr[entry_ptr->prefetch_type_id]->mem_type;
-            } /* end if */
-            else
-                mem_type = entry_ptr->type->mem_type;
+                if(entry_ptr->prefetched) {
+                    HDassert(entry_ptr->type->id == H5AC_PREFETCHED_ENTRY_ID);
+                    mem_type = cache_ptr->
+                               class_table_ptr[entry_ptr->prefetch_type_id]->
+                               mem_type;
+                } /* end if */
+                else
+                    mem_type = entry_ptr->type->mem_type;
 
-            if(H5F_block_write(f, mem_type, entry_ptr->addr, entry_ptr->size, dxpl_id, entry_ptr->image_ptr) < 0)
-                HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't write image to file")
+                if(H5F_block_write(f, mem_type, entry_ptr->addr, entry_ptr->size, entry_ptr->image_ptr) < 0)
+                    HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't write image to file")
+#ifdef H5_HAVE_PARALLEL
+            }
+#endif /* H5_HAVE_PARALLEL */
         } /* end if */
 
         /* if the entry has a notify callback, notify it that we have 
@@ -6420,7 +6268,7 @@ H5C__flush_single_entry(H5F_t *f, hid_t dxpl_id, H5C_cache_entry_t *entry_ptr,
                 HDassert(entry_ptr->flush_dep_ndirty_children == 0);
             if(entry_ptr->flush_dep_nparents > 0)
                 if(H5C__mark_flush_dep_clean(entry_ptr) < 0)
-                    HGOTO_ERROR(H5E_CACHE, H5E_CANTMARKDIRTY, FAIL, "Can't propagate flush dep clean flag")
+                    HGOTO_ERROR(H5E_CACHE, H5E_CANTMARKCLEAN, FAIL, "Can't propagate flush dep clean flag")
         } /* end if */
     } /* end else */
 
@@ -6467,7 +6315,7 @@ H5C__flush_single_entry(H5F_t *f, hid_t dxpl_id, H5C_cache_entry_t *entry_ptr,
          * the entry occupies 
          */
         if(free_file_space) {
-            size_t fsf_size;
+            hsize_t fsf_size;
 
             /* Sanity checks */
             HDassert(H5F_addr_defined(entry_ptr->addr));
@@ -6494,7 +6342,7 @@ H5C__flush_single_entry(H5F_t *f, hid_t dxpl_id, H5C_cache_entry_t *entry_ptr,
                 fsf_size = entry_ptr->size;
 
             /* Release the space on disk */
-            if(H5MF_xfree(f, entry_ptr->type->mem_type, dxpl_id, entry_ptr->addr, (hsize_t)fsf_size) < 0)
+            if(H5MF_xfree(f, entry_ptr->type->mem_type, entry_ptr->addr, fsf_size) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFREE, FAIL, "unable to free file space for cache entry")
         } /* end if ( free_file_space ) */
 
@@ -6670,7 +6518,6 @@ done:
  */
 static void *
 H5C_load_entry(H5F_t *              f,
-                hid_t               dxpl_id,
 #ifdef H5_HAVE_PARALLEL
                 hbool_t             coll_access,
 #endif /* H5_HAVE_PARALLEL */
@@ -6770,7 +6617,7 @@ H5C_load_entry(H5F_t *              f,
 #ifdef H5_HAVE_PARALLEL
             if(!coll_access || 0 == mpi_rank) {
 #endif /* H5_HAVE_PARALLEL */
-                if(H5F_block_read(f, type->mem_type, addr, len, dxpl_id, image) < 0)
+                if(H5F_block_read(f, type->mem_type, addr, len, image) < 0)
                     HGOTO_ERROR(H5E_CACHE, H5E_READERROR, NULL, "Can't read image*")
 #ifdef H5_HAVE_PARALLEL
             } /* end if */
@@ -6817,7 +6664,7 @@ H5C_load_entry(H5F_t *              f,
                             /* If the thing's image needs to be bigger for a speculatively
                              * loaded thing, go get the on-disk image again (the extra portion).
                              */
-                            if(H5F_block_read(f, type->mem_type, addr + len, actual_len - len, dxpl_id, image + len) < 0)
+                            if(H5F_block_read(f, type->mem_type, addr + len, actual_len - len, image + len) < 0)
                                 HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, NULL, "can't read image")
 #ifdef H5_HAVE_PARALLEL
                         }
@@ -6942,8 +6789,10 @@ H5C_load_entry(H5F_t *              f,
     entry->next                         = NULL;
     entry->prev                         = NULL;
 
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
     entry->aux_next                     = NULL;
     entry->aux_prev                     = NULL;
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
 
 #ifdef H5_HAVE_PARALLEL
     entry->coll_next                    = NULL;
@@ -7018,8 +6867,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__make_space_in_cache(H5F_t *f, hid_t dxpl_id, size_t space_needed,
-    hbool_t	write_permitted)
+H5C__make_space_in_cache(H5F_t *f, size_t space_needed, hbool_t	write_permitted)
 {
     H5C_t *		cache_ptr = f->shared->cache;
 #if H5C_COLLECT_CACHE_STATS
@@ -7133,7 +6981,7 @@ H5C__make_space_in_cache(H5F_t *f, hid_t dxpl_id, size_t space_needed,
                     cache_ptr->entries_removed_counter = 0;
                     cache_ptr->last_entry_removed_ptr  = NULL;
 
-                    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, H5C__NO_FLAGS_SET) < 0)
+                    if(H5C__flush_single_entry(f, entry_ptr, H5C__NO_FLAGS_SET) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry")
 
 		    if ( ( cache_ptr->entries_removed_counter > 1 ) ||
@@ -7150,7 +6998,7 @@ H5C__make_space_in_cache(H5F_t *f, hid_t dxpl_id, size_t space_needed,
                     cache_ptr->entries_scanned_to_make_space++;
 #endif /* H5C_COLLECT_CACHE_STATS */
 
-                    if(H5C__flush_single_entry(f, dxpl_id, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
+                    if(H5C__flush_single_entry(f, entry_ptr, H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry")
                 } else {
                     /* We have enough space so don't flush clean entry. */
@@ -7278,6 +7126,7 @@ H5C__make_space_in_cache(H5F_t *f, hid_t dxpl_id, size_t space_needed,
 
         HDassert( H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS );
 
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
         initial_list_len = cache_ptr->cLRU_list_len;
         entry_ptr = cache_ptr->cLRU_tail_ptr;
 
@@ -7303,13 +7152,9 @@ H5C__make_space_in_cache(H5F_t *f, hid_t dxpl_id, size_t space_needed,
                  && ( ! (entry_ptr->coll_access) )
 #endif /* H5_HAVE_PARALLEL */
                ) {
-
-                if ( H5C__flush_single_entry(f, dxpl_id, entry_ptr, 
-                                  H5C__FLUSH_INVALIDATE_FLAG | 
-                                  H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0 )
-
-                    HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, \
-                                "unable to flush entry")
+                if(H5C__flush_single_entry(f, entry_ptr,
+                        H5C__FLUSH_INVALIDATE_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
+                    HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush entry")
 
             } /* end if */
 
@@ -7322,6 +7167,7 @@ H5C__make_space_in_cache(H5F_t *f, hid_t dxpl_id, size_t space_needed,
             entry_ptr = prev_ptr;
 	    entries_examined++;
         }
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
     }
 
 done:
@@ -7793,7 +7639,7 @@ H5C_entry_in_skip_list(H5C_t * cache_ptr, H5C_cache_entry_t *target_ptr)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__flush_marked_entries(H5F_t * f, hid_t dxpl_id)
+H5C__flush_marked_entries(H5F_t * f)
 { 
     herr_t ret_value = SUCCEED;
 
@@ -7803,7 +7649,7 @@ H5C__flush_marked_entries(H5F_t * f, hid_t dxpl_id)
     HDassert(f != NULL);
 
     /* Flush all marked entries */
-    if(H5C_flush_cache(f, dxpl_id, H5C__FLUSH_MARKED_ENTRIES_FLAG | H5C__FLUSH_IGNORE_PROTECTED_FLAG) < 0)
+    if(H5C_flush_cache(f, H5C__FLUSH_MARKED_ENTRIES_FLAG | H5C__FLUSH_IGNORE_PROTECTED_FLAG) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush cache")
 
 done:
@@ -7981,7 +7827,7 @@ done:
 static herr_t
 H5C__mark_flush_dep_clean(H5C_cache_entry_t * entry)
 {
-    unsigned u;                         /* Local index variable */
+    int i;                              /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -7990,16 +7836,19 @@ H5C__mark_flush_dep_clean(H5C_cache_entry_t * entry)
     HDassert(entry);
 
     /* Iterate over the parent entries, if any */
-    for(u = 0; u < entry->flush_dep_nparents; u++) {
+    /* Note reverse iteration order, in case the callback removes the flush
+     *  dependency - QAK, 2017/08/12
+     */
+    for(i = ((int)entry->flush_dep_nparents) - 1; i >= 0; i--) {
 	/* Sanity check */
-	HDassert(entry->flush_dep_parent[u]->flush_dep_ndirty_children > 0);
+	HDassert(entry->flush_dep_parent[i]->flush_dep_ndirty_children > 0);
 
 	/* Adjust the parent's number of dirty children */
-	entry->flush_dep_parent[u]->flush_dep_ndirty_children--;
+	entry->flush_dep_parent[i]->flush_dep_ndirty_children--;
 
         /* If the parent has a 'notify' callback, send a 'child entry cleaned' notice */
-        if(entry->flush_dep_parent[u]->type->notify &&
-                (entry->flush_dep_parent[u]->type->notify)(H5C_NOTIFY_ACTION_CHILD_CLEANED, entry->flush_dep_parent[u]) < 0)
+        if(entry->flush_dep_parent[i]->type->notify &&
+                (entry->flush_dep_parent[i]->type->notify)(H5C_NOTIFY_ACTION_CHILD_CLEANED, entry->flush_dep_parent[i]) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify parent about child entry dirty flag reset")
     } /* end for */
 
@@ -8025,7 +7874,7 @@ done:
 herr_t
 H5C__mark_flush_dep_serialized(H5C_cache_entry_t * entry_ptr)
 {
-    unsigned u;                         /* Local index variable */
+    int i;                              /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -8034,18 +7883,21 @@ H5C__mark_flush_dep_serialized(H5C_cache_entry_t * entry_ptr)
     HDassert(entry_ptr);
 
     /* Iterate over the parent entries, if any */
-    for(u = 0; u < entry_ptr->flush_dep_nparents; u++) {
-
+    /* Note reverse iteration order, in case the callback removes the flush
+     *  dependency - QAK, 2017/08/12
+     */
+    for(i = ((int)entry_ptr->flush_dep_nparents) - 1; i >= 0; i--) {
+	/* Sanity checks */
         HDassert(entry_ptr->flush_dep_parent);
-        HDassert(entry_ptr->flush_dep_parent[u]->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
-        HDassert(entry_ptr->flush_dep_parent[u]->flush_dep_nunser_children > 0);
+        HDassert(entry_ptr->flush_dep_parent[i]->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
+        HDassert(entry_ptr->flush_dep_parent[i]->flush_dep_nunser_children > 0);
 
         /* decrement the parents number of unserialized children */
-        entry_ptr->flush_dep_parent[u]->flush_dep_nunser_children--;
+        entry_ptr->flush_dep_parent[i]->flush_dep_nunser_children--;
 
         /* If the parent has a 'notify' callback, send a 'child entry serialized' notice */
-        if(entry_ptr->flush_dep_parent[u]->type->notify &&
-                (entry_ptr->flush_dep_parent[u]->type->notify)(H5C_NOTIFY_ACTION_CHILD_SERIALIZED, entry_ptr->flush_dep_parent[u]) < 0)
+        if(entry_ptr->flush_dep_parent[i]->type->notify &&
+                (entry_ptr->flush_dep_parent[i]->type->notify)(H5C_NOTIFY_ACTION_CHILD_SERIALIZED, entry_ptr->flush_dep_parent[i]) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTNOTIFY, FAIL, "can't notify parent about child entry serialized flag set")
     } /* end for */
 
@@ -8057,7 +7909,7 @@ done:
 /*-------------------------------------------------------------------------
  * Function:    H5C__mark_flush_dep_unserialized()
  *
- * Purpose:     Decrement the flush_dep_nunser_children fields of all the 
+ * Purpose:     Increment the flush_dep_nunser_children fields of all the
  *              target entry's flush dependency parents in response to 
  *              the target entry becoming unserialized.
  *
@@ -8178,7 +8030,7 @@ H5C__assert_flush_dep_nocycle(const H5C_cache_entry_t * entry,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__serialize_cache(H5F_t *f, hid_t dxpl_id)
+H5C__serialize_cache(H5F_t *f)
 {
 #if H5C_DO_SANITY_CHECKS
     int                 i;
@@ -8278,14 +8130,14 @@ H5C__serialize_cache(H5F_t *f, hid_t dxpl_id)
             case H5C_RING_RDFSM:
                 /* Settle raw data FSM */
                 if(!cache_ptr->rdfsm_settled)
-                    if(H5MF_settle_raw_data_fsm(f, dxpl_id, &cache_ptr->rdfsm_settled) < 0)
+                    if(H5MF_settle_raw_data_fsm(f, &cache_ptr->rdfsm_settled) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "RD FSM settle failed")
                 break;
 
             case H5C_RING_MDFSM:
                 /* Settle metadata FSM */
                 if(!cache_ptr->mdfsm_settled)
-                    if(H5MF_settle_meta_data_fsm(f, dxpl_id, &cache_ptr->mdfsm_settled) < 0)
+                    if(H5MF_settle_meta_data_fsm(f, &cache_ptr->mdfsm_settled) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "MD FSM settle failed")
                 break;
 
@@ -8298,7 +8150,7 @@ H5C__serialize_cache(H5F_t *f, hid_t dxpl_id)
                 break;
         } /* end switch */
 
-        if(H5C__serialize_ring(f, dxpl_id, ring) < 0)
+        if(H5C__serialize_ring(f, ring) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "serialize ring failed")
 
         ring++;
@@ -8358,7 +8210,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__serialize_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring)
+H5C__serialize_ring(H5F_t *f, H5C_ring_t ring)
 {
     hbool_t		done = FALSE;
     H5C_t             * cache_ptr;
@@ -8489,7 +8341,7 @@ H5C__serialize_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring)
 		    HDassert(entry_ptr->serialization_count == 0);
 
 		    /* Serialize the entry */
-		    if(H5C__serialize_single_entry(f, dxpl_id, cache_ptr, entry_ptr) < 0)
+		    if(H5C__serialize_single_entry(f, cache_ptr, entry_ptr) < 0)
             	        HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "entry serialization failed")
 
                     HDassert(entry_ptr->flush_dep_nunser_children == 0);
@@ -8554,7 +8406,7 @@ H5C__serialize_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring)
                     HDassert(entry_ptr->flush_dep_nunser_children == 0);
 
 	            /* Serialize the entry */
-	            if(H5C__serialize_single_entry(f, dxpl_id,  cache_ptr, entry_ptr) < 0)
+	            if(H5C__serialize_single_entry(f, cache_ptr, entry_ptr) < 0)
 		        HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "entry serialization failed")
 
                     /* Check for the cache changing */
@@ -8600,8 +8452,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__serialize_single_entry(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr,
-    H5C_cache_entry_t *entry_ptr)
+H5C__serialize_single_entry(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr)
 {
     herr_t		ret_value = SUCCEED;      /* Return value */
 
@@ -8637,7 +8488,7 @@ H5C__serialize_single_entry(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr,
     } /* end if */
 
     /* Generate image for entry */
-    if(H5C__generate_image(f, cache_ptr, entry_ptr, dxpl_id) < 0)
+    if(H5C__generate_image(f, cache_ptr, entry_ptr) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTSERIALIZE, FAIL, "Can't generate image for cache entry")
 
     /* Reset the flush_in progress flag */
@@ -8672,8 +8523,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__generate_image(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr, 
-    hid_t dxpl_id)
+H5C__generate_image(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr)
 {
     haddr_t		new_addr = HADDR_UNDEF;
     haddr_t		old_addr = HADDR_UNDEF;
@@ -8699,7 +8549,7 @@ H5C__generate_image(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr,
 
     /* Call client's pre-serialize callback, if there's one */
     if(entry_ptr->type->pre_serialize && 
-            (entry_ptr->type->pre_serialize)(f, dxpl_id, (void *)entry_ptr,
+            (entry_ptr->type->pre_serialize)(f, (void *)entry_ptr,
                 entry_ptr->addr, entry_ptr->size, &new_addr, &new_len, &serialize_flags) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to pre-serialize entry")
 
@@ -8864,6 +8714,12 @@ H5C_remove_entry(void *_entry)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove protected entry from cache")
     if(entry->is_pinned)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove pinned entry from cache")
+    /* NOTE: If these two errors are getting tripped because the entry is
+     *          in a flush dependency with a freedspace entry, move the checks
+     *          after the "before evict" message is sent, and add the
+     *          "child being evicted" message to the "before evict" notify
+     *          section below.  QAK - 2017/08/03
+     */
     if(entry->flush_dep_nparents > 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove entry with flush dependency parents from cache")
     if(entry->flush_dep_nchildren > 0)
diff --git a/src/H5CS.c b/src/H5CS.c
index 477b5f9..0a3dcce 100644
--- a/src/H5CS.c
+++ b/src/H5CS.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5CSprivate.h b/src/H5CSprivate.h
index ab7f993..467dd9d 100644
--- a/src/H5CSprivate.h
+++ b/src/H5CSprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5CX.c b/src/H5CX.c
new file mode 100644
index 0000000..deaf1a1
--- /dev/null
+++ b/src/H5CX.c
@@ -0,0 +1,2813 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer:  Quincey Koziol <koziol@lbl.gov>
+ *              Monday, February 19, 2018
+ *
+ * Purpose:
+ *      Keep a set of "psuedo-global" information for an API call.  This
+ *      general corresponds to the DXPL for the call, along with cached
+ *      information from them.
+ */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5CXmodule.h"          /* This source code file is part of the H5CX module */
+
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"          /* Generic Functions                    */
+#include "H5CXprivate.h"        /* API Contexts                         */
+#include "H5Dprivate.h"		/* Datasets				*/
+#include "H5Eprivate.h"         /* Error handling                       */
+#include "H5FLprivate.h"        /* Free Lists                           */
+#include "H5Iprivate.h"         /* IDs                                  */
+#include "H5Lprivate.h"		/* Links		  		*/
+#include "H5MMprivate.h"        /* Memory management                    */
+#include "H5Pprivate.h"         /* Property lists                       */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+#ifdef H5_HAVE_THREADSAFE
+/*
+ * The per-thread API context. pthread_once() initializes a special
+ * key that will be used by all threads to create a stack specific to
+ * each thread individually. The association of contexts to threads will
+ * be handled by the pthread library.
+ *
+ * In order for this macro to work, H5E_get_my_stack() must be preceeded
+ * by "H5CX_node_t *ctx =".
+ */
+#define H5CX_get_my_context()  H5CX__get_context()
+#else /* H5_HAVE_THREADSAFE */
+/*
+ * The current API context.
+ */
+#define H5CX_get_my_context() (&H5CX_head_g)
+#endif /* H5_HAVE_THREADSAFE */
+
+/* Common macro for the duplicated code to retrieve properties from a property list */
+#define H5CX_RETRIEVE_PROP_COMMON(PL, DEF_PL, PROP_NAME, PROP_FIELD)          \
+    /* Check for default property list */                                     \
+    if((*head)->ctx.H5_GLUE(PL,_id) == (DEF_PL))                              \
+        HDmemcpy(&(*head)->ctx.PROP_FIELD, &H5_GLUE3(H5CX_def_,PL,_cache).PROP_FIELD, sizeof(H5_GLUE3(H5CX_def_,PL,_cache).PROP_FIELD)); \
+    else {                                                                    \
+        /* Check if the property list is already available */                 \
+        if(NULL == (*head)->ctx.PL)                                           \
+            /* Get the dataset transfer property list pointer */              \
+            if(NULL == ((*head)->ctx.PL = (H5P_genplist_t *)H5I_object((*head)->ctx.H5_GLUE(PL,_id)))) \
+                HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, FAIL, "can't get default dataset transfer property list") \
+                                                                              \
+        /* Get the property */                                                \
+        if(H5P_get((*head)->ctx.PL, (PROP_NAME), &(*head)->ctx.PROP_FIELD) < 0) \
+            HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "can't retrieve value from API context") \
+    } /* end else */                                                          \
+                                                                              \
+    /* Mark the field as valid */                                             \
+    (*head)->ctx.H5_GLUE(PROP_FIELD,_valid) = TRUE;
+
+/* Macro for the duplicated code to retrieve properties from a property list */
+#define H5CX_RETRIEVE_PROP_VALID(PL, DEF_PL, PROP_NAME, PROP_FIELD)           \
+    /* Check if the value has been retrieved already */                       \
+    if(!(*head)->ctx.H5_GLUE(PROP_FIELD,_valid)) {                            \
+        H5CX_RETRIEVE_PROP_COMMON(PL, DEF_PL, PROP_NAME, PROP_FIELD)          \
+    } /* end if */
+
+#ifdef H5_HAVE_PARALLEL
+/* Macro for the duplicated code to retrieve possibly set properties from a property list */
+#define H5CX_RETRIEVE_PROP_VALID_SET(PL, DEF_PL, PROP_NAME, PROP_FIELD)       \
+    /* Check if the value has been retrieved already */                       \
+    if(!((*head)->ctx.H5_GLUE(PROP_FIELD,_valid) || (*head)->ctx.H5_GLUE(PROP_FIELD,_set))) { \
+        H5CX_RETRIEVE_PROP_COMMON(PL, DEF_PL, PROP_NAME, PROP_FIELD)          \
+    } /* end if */
+#endif /* H5_HAVE_PARALLEL */
+
+#ifdef H5_HAVE_PARALLEL
+/* Macro for the duplicated code to test and set properties for a property list */
+#define H5CX_TEST_SET_PROP(PROP_NAME, PROP_FIELD)                             \
+{                                                                             \
+    htri_t check_prop = 0;              /* Whether the property exists in the API context's DXPL */ \
+                                                                              \
+    /* Check if property exists in DXPL */                                    \
+    if(!(*head)->ctx.H5_GLUE(PROP_FIELD,_set)) {                              \
+        /* Check if the property list is already available */                 \
+        if(NULL == (*head)->ctx.dxpl)                                         \
+            /* Get the dataset transfer property list pointer */              \
+            if(NULL == ((*head)->ctx.dxpl = (H5P_genplist_t *)H5I_object((*head)->ctx.dxpl_id))) \
+                HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, FAIL, "can't get default dataset transfer property list") \
+                                                                              \
+        if((check_prop = H5P_exist_plist((*head)->ctx.dxpl, PROP_NAME)) < 0)  \
+            HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "error checking for property") \
+    } /* end if */                                                            \
+                                                                              \
+    /* If property was already set or exists (for first set), update it */    \
+    if((*head)->ctx.H5_GLUE(PROP_FIELD,_set) || check_prop > 0) {             \
+        /* Cache the value for later, marking it to set in DXPL when context popped */ \
+        (*head)->ctx.PROP_FIELD = PROP_FIELD;                                 \
+        (*head)->ctx.H5_GLUE(PROP_FIELD,_set) = TRUE;                         \
+    } /* end if */                                                            \
+}
+#endif /* H5_HAVE_PARALLEL */
+
+/* Macro for the duplicated code to test and set properties for a property list */
+#define H5CX_SET_PROP(PROP_NAME, PROP_FIELD)                                  \
+    if((*head)->ctx.H5_GLUE(PROP_FIELD,_set)) {                               \
+        /* Check if the property list is already available */                 \
+        if(NULL == (*head)->ctx.dxpl)                                         \
+            /* Get the dataset transfer property list pointer */              \
+            if(NULL == ((*head)->ctx.dxpl = (H5P_genplist_t *)H5I_object((*head)->ctx.dxpl_id))) \
+                HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, NULL, "can't get default dataset transfer property list") \
+                                                                              \
+        /* Set the chunk filter mask property */                              \
+        if(H5P_set((*head)->ctx.dxpl, PROP_NAME, &(*head)->ctx.PROP_FIELD) < 0) \
+            HGOTO_ERROR(H5E_CONTEXT, H5E_CANTSET, NULL, "error setting filter mask xfer property") \
+    } /* end if */
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/* Typedef for context about each API call, as it proceeds */
+/* Fields in this struct are of several types:
+ * - The DXPL & LAPL ID are either library default ones (from the API context
+ *      initialization) or passed in from the application via an API call
+ *      parameter.  The corresponding H5P_genplist_t* is just the underlying
+ *      property list struct for the ID, to optimize retrieving properties
+ *      from the list multiple times.
+ *
+ * - Internal fields, used and set only within the library, for managing the
+ *      operation under way.  These do not correspond to properties in the
+ *      DXPL or LAPL and can have any name.
+ *
+ * - Cached fields, which are not returned to the application, for managing
+ *      the operation under way.  These correspond to properties in the DXPL
+ *      or LAPL, and are retrieved either from the (global) cache for a
+ *      default property list, or from the corresponding property in the
+ *      application's (non-default) property list.  Getting / setting these
+ *      properties within the library does _not_ affect the application's
+ *      property list.  Note that the naming of these fields, <foo> and
+ *      <foo>_valid, is important for the H5CX_RETRIEVE_PROP_VALID ahd
+ *      H5CX_RETRIEVE_PROP_VALID_SET macros to work properly.
+ *
+ * - "Return-only"" properties that are returned to the application, mainly
+ *      for sending out "introspection" information ("Why did collective I/O
+ *      get broken for this operation?", "Which filters are set on the chunk I
+ *      just directly read in?", etc) Setting these fields will cause the
+ *      corresponding property in the property list to be set when the API
+ *      context is popped, when returning from the API routine.  Note that the
+ *      naming of these fields, <foo> and <foo>_set, is important for the
+*       H5CX_TEST_SET_PROP and H5CX_SET_PROP macros to work properly.
+ */
+typedef struct H5CX_t {
+    /* DXPL */
+    hid_t dxpl_id;              /* DXPL ID for API operation */
+    H5P_genplist_t *dxpl;       /* Dataset Transfer Property List */
+
+    /* LAPL */
+    hid_t lapl_id;              /* LAPL ID for API operation */
+    H5P_genplist_t *lapl;       /* Link Access Property List */
+
+    /* Internal: Object tagging info */
+    haddr_t tag;                /* Current object's tag (ohdr chunk #0 address) */
+
+    /* Internal: Metadata cache info */
+    H5AC_ring_t ring;           /* Current metadata cache ring for entries */
+
+#ifdef H5_HAVE_PARALLEL
+    /* Internal: Parallel I/O settings */
+    hbool_t coll_metadata_read; /* Whether to use collective I/O for metadata read */
+    MPI_Datatype btype;         /* MPI datatype for buffer, when using collective I/O */
+    MPI_Datatype ftype;         /* MPI datatype for file, when using collective I/O */
+    hbool_t mpi_file_flushing;  /* Whether an MPI-opened file is being flushed */
+#endif /* H5_HAVE_PARALLEL */
+
+    /* Cached DXPL properties */
+    size_t max_temp_buf;        /* Maximum temporary buffer size */
+    hbool_t max_temp_buf_valid; /* Whether maximum temporary buffer size is valid */
+    void *tconv_buf;            /* Temporary conversion buffer (H5D_XFER_TCONV_BUF_NAME) */
+    hbool_t tconv_buf_valid;    /* Whether temporary conversion buffer is valid */
+    void *bkgr_buf;             /* Background conversion buffer (H5D_XFER_BKGR_BUF_NAME) */
+    hbool_t bkgr_buf_valid;     /* Whether background conversion buffer is valid */
+    H5T_bkg_t bkgr_buf_type;    /* Background buffer type (H5D_XFER_BKGR_BUF_NAME) */
+    hbool_t bkgr_buf_type_valid;/* Whether background buffer type is valid */
+    double btree_split_ratio[3];        /* B-tree split ratios */
+    hbool_t btree_split_ratio_valid;    /* Whether B-tree split ratios are valid */
+    size_t vec_size;            /* Size of hyperslab vector (H5D_XFER_HYPER_VECTOR_SIZE_NAME) */
+    hbool_t vec_size_valid;     /* Whether hyperslab vector is valid */
+#ifdef H5_HAVE_PARALLEL
+    H5FD_mpio_xfer_t io_xfer_mode; /* Parallel transfer mode for this request (H5D_XFER_IO_XFER_MODE_NAME) */
+    hbool_t io_xfer_mode_valid; /* Whether parallel transfer mode is valid */
+    H5FD_mpio_collective_opt_t mpio_coll_opt; /* Parallel transfer with independent IO or collective IO with this mode (H5D_XFER_MPIO_COLLECTIVE_OPT_NAME) */
+    hbool_t mpio_coll_opt_valid; /* Whether parallel transfer option is valid */
+    H5FD_mpio_chunk_opt_t mpio_chunk_opt_mode; /* Collective chunk option (H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME) */
+    hbool_t mpio_chunk_opt_mode_valid; /* Whether collective chunk option is valid */
+    unsigned mpio_chunk_opt_num; /* Collective chunk thrreshold (H5D_XFER_MPIO_CHUNK_OPT_NUM_NAME) */
+    hbool_t mpio_chunk_opt_num_valid; /* Whether collective chunk threshold is valid */
+    unsigned mpio_chunk_opt_ratio; /* Collective chunk ratio (H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME) */
+    hbool_t mpio_chunk_opt_ratio_valid; /* Whether collective chunk ratio is valid */
+#endif /* H5_HAVE_PARALLEL */
+    H5Z_EDC_t err_detect;       /* Error detection info (H5D_XFER_EDC_NAME) */
+    hbool_t err_detect_valid;   /* Whether error detection info is valid */
+    H5Z_cb_t filter_cb;         /* Filter callback function (H5D_XFER_FILTER_CB_NAME) */
+    hbool_t filter_cb_valid;    /* Whether filter callback function is valid */
+    H5Z_data_xform_t *data_transform; /* Data transform info (H5D_XFER_XFORM_NAME) */
+    hbool_t data_transform_valid; /* Whether data transform info is valid */
+    H5T_vlen_alloc_info_t vl_alloc_info; /* VL datatype alloc info (H5D_XFER_VLEN_*_NAME) */
+    hbool_t vl_alloc_info_valid; /* Whether VL datatype alloc info is valid */
+    hbool_t dcr_flag;           /* Direct chunk read flag (H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME) */
+    hbool_t dcr_flag_valid;     /* Whether direct chunk read flag is valid */
+    hsize_t *dcr_offset;        /* Direct chunk read offset (H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME) */
+    hbool_t dcr_offset_valid;   /* Whether direct chunk read offset is valid */
+    hbool_t dcw_flag;           /* Direct chunk write flag (H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME) */
+    hbool_t dcw_flag_valid;     /* Whether direct chunk write flag is valid */
+    uint32_t dcw_filters;       /* Direct chunk write filter flags (H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_NAME) */
+    hbool_t dcw_filters_valid;  /* Whether direct chunk write filter flags is valid */
+    hsize_t *dcw_offset;        /* Direct chunk write offset (H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_NAME) */
+    hbool_t dcw_offset_valid;   /* Whether direct chunk write offset is valid */
+    uint32_t dcw_datasize;      /* Direct chunk write data size (H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_NAME) */
+    hbool_t dcw_datasize_valid; /* Whether direct chunk write data size is valid */
+    H5T_conv_cb_t dt_conv_cb;   /* Datatype conversion struct (H5D_XFER_CONV_CB_NAME) */
+    hbool_t dt_conv_cb_valid;   /* Whether datatype conversion struct is valid */
+
+    /* Return-only DXPL properties to return to application */
+    uint32_t dcr_filters;       /* Direct chunk read filter flags (H5D_XFER_DIRECT_CHUNK_READ_FILTERS_NAME) */
+    hbool_t dcr_filters_set;    /* Whether direct chunk read filter flags are set */
+#ifdef H5_HAVE_PARALLEL
+    H5D_mpio_actual_chunk_opt_mode_t mpio_actual_chunk_opt; /* Chunk optimization mode used for parallel I/O (H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME) */
+    hbool_t mpio_actual_chunk_opt_set; /* Whether chunk optimization mode used for parallel I/O is set */
+    H5D_mpio_actual_io_mode_t mpio_actual_io_mode; /* Actual I/O mode used for parallel I/O (H5D_MPIO_ACTUAL_IO_MODE_NAME) */
+    hbool_t mpio_actual_io_mode_set; /* Whether actual I/O mode used for parallel I/O is set */
+    uint32_t mpio_local_no_coll_cause; /* Local reason for breaking collective I/O (H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME) */
+    hbool_t mpio_local_no_coll_cause_set; /* Whether local reason for breaking collective I/O is set */
+    hbool_t mpio_local_no_coll_cause_valid; /* Whether local reason for breaking collective I/O is valid */
+    uint32_t mpio_global_no_coll_cause; /* Global reason for breaking collective I/O (H5D_MPIO_GLOBAL_NO_COLLECTIVE_CAUSE_NAME) */
+    hbool_t mpio_global_no_coll_cause_set; /* Whether global reason for breaking collective I/O is set */
+    hbool_t mpio_global_no_coll_cause_valid; /* Whether global reason for breaking collective I/O is valid */
+#ifdef H5_HAVE_INSTRUMENTED_LIBRARY
+    int mpio_coll_chunk_link_hard;  /* Instrumented "collective chunk link hard" value (H5D_XFER_COLL_CHUNK_LINK_HARD_NAME) */
+    hbool_t mpio_coll_chunk_link_hard_set; /* Whether instrumented "collective chunk link hard" value is set */
+    int mpio_coll_chunk_multi_hard;  /* Instrumented "collective chunk multi hard" value (H5D_XFER_COLL_CHUNK_MULTI_HARD_NAME) */
+    hbool_t mpio_coll_chunk_multi_hard_set; /* Whether instrumented "collective chunk multi hard" value is set */
+    int mpio_coll_chunk_link_num_true;  /* Instrumented "collective chunk link num true" value (H5D_XFER_COLL_CHUNK_LINK_NUM_TRUE_NAME) */
+    hbool_t mpio_coll_chunk_link_num_true_set; /* Whether instrumented "collective chunk link num true" value is set */
+    int mpio_coll_chunk_link_num_false;  /* Instrumented "collective chunk link num false" value (H5D_XFER_COLL_CHUNK_LINK_NUM_FALSE_NAME) */
+    hbool_t mpio_coll_chunk_link_num_false_set; /* Whether instrumented "collective chunk link num false" value is set */
+    int mpio_coll_chunk_multi_ratio_coll;  /* Instrumented "collective chunk multi ratio coll" value (H5D_XFER_COLL_CHUNK_MULTI_RATIO_COLL_NAME) */
+    hbool_t mpio_coll_chunk_multi_ratio_coll_set; /* Whether instrumented "collective chunk multi ratio coll" value is set */
+    int mpio_coll_chunk_multi_ratio_ind;  /* Instrumented "collective chunk multi ratio ind" value (H5D_XFER_COLL_CHUNK_MULTI_RATIO_IND_NAME) */
+    hbool_t mpio_coll_chunk_multi_ratio_ind_set; /* Whether instrumented "collective chunk multi ratio ind" value is set */
+#endif /* H5_HAVE_INSTRUMENTED_LIBRARY */
+#endif /* H5_HAVE_PARALLEL */
+
+    /* Cached LAPL properties */
+    size_t nlinks;              /* Number of soft / UD links to traverse (H5L_ACS_NLINKS_NAME) */
+    hbool_t nlinks_valid;       /* Whether number of soft / UD links to traverse is valid */
+} H5CX_t;
+
+/* Typedef for nodes on the API context stack */
+/* Each entry into the library through an API routine invokes H5CX_push()
+ * in a FUNC_ENTER_API* macro, which pushes an H5CX_node_t on the API
+ * context [thread-local] stack, after initializing it with default values
+ * in H5CX__push_common().
+ */
+typedef struct H5CX_node_t {
+    H5CX_t ctx;                 /* Context for current API call */
+    struct H5CX_node_t *next;   /* Pointer to previous context, on stack */
+} H5CX_node_t;
+
+/* Typedef for cached default dataset transfer property list information */
+/* This is initialized to the values in the default DXPL during package
+ * initialization and then remains constant for the rest of the library's
+ * operation.  When a field in H5CX_t is retrieved from an API context that
+ * uses a default DXPL, this value is copied instead of spending time looking
+ * up the property in the DXPL.
+ */
+typedef struct H5CX_dxpl_cache_t {
+    size_t max_temp_buf;            /* Maximum temporary buffer size (H5D_XFER_MAX_TEMP_BUF_NAME) */
+    void *tconv_buf;                /* Temporary conversion buffer (H5D_XFER_TCONV_BUF_NAME) */
+    void *bkgr_buf;                 /* Background conversion buffer (H5D_XFER_BKGR_BUF_NAME) */
+    H5T_bkg_t bkgr_buf_type;        /* Background buffer type (H5D_XFER_BKGR_BUF_NAME) */
+    double btree_split_ratio[3];    /* B-tree split ratios (H5D_XFER_BTREE_SPLIT_RATIO_NAME) */
+    size_t vec_size;                /* Size of hyperslab vector (H5D_XFER_HYPER_VECTOR_SIZE_NAME) */
+#ifdef H5_HAVE_PARALLEL
+    H5FD_mpio_xfer_t io_xfer_mode;  /* Parallel transfer mode for this request (H5D_XFER_IO_XFER_MODE_NAME) */
+    H5FD_mpio_collective_opt_t mpio_coll_opt; /* Parallel transfer with independent IO or collective IO with this mode (H5D_XFER_MPIO_COLLECTIVE_OPT_NAME) */
+    uint32_t mpio_local_no_coll_cause; /* Local reason for breaking collective I/O (H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME) */
+    uint32_t mpio_global_no_coll_cause; /* Global reason for breaking collective I/O (H5D_MPIO_GLOBAL_NO_COLLECTIVE_CAUSE_NAME) */
+    H5FD_mpio_chunk_opt_t mpio_chunk_opt_mode; /* Collective chunk option (H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME) */
+    unsigned mpio_chunk_opt_num;    /* Collective chunk thrreshold (H5D_XFER_MPIO_CHUNK_OPT_NUM_NAME) */
+    unsigned mpio_chunk_opt_ratio;  /* Collective chunk ratio (H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME) */
+#endif /* H5_HAVE_PARALLEL */
+    H5Z_EDC_t err_detect;           /* Error detection info (H5D_XFER_EDC_NAME) */
+    H5Z_cb_t filter_cb;             /* Filter callback function (H5D_XFER_FILTER_CB_NAME) */
+    H5Z_data_xform_t *data_transform; /* Data transform info (H5D_XFER_XFORM_NAME) */
+    H5T_vlen_alloc_info_t vl_alloc_info; /* VL datatype alloc info (H5D_XFER_VLEN_*_NAME) */
+    hbool_t dcr_flag;               /* Direct chunk read flag (H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME) */
+    hsize_t *dcr_offset;            /* Direct chunk read offset (H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME) */
+    hbool_t dcw_flag;               /* Direct chunk write flag (H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME) */
+    uint32_t dcw_datasize;          /* Direct chunk write data size (H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_NAME) */
+    hsize_t *dcw_offset;            /* Direct chunk write offset (H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_NAME) */
+    uint32_t dcw_filters;           /* Direct chunk write filter flags (H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_NAME) */
+    H5T_conv_cb_t dt_conv_cb;       /* Datatype conversion struct (H5D_XFER_CONV_CB_NAME) */
+} H5CX_dxpl_cache_t;
+
+/* Typedef for cached default link access property list information */
+/* (Same as the cached DXPL struct, above, except for the default LAPL) */
+typedef struct H5CX_lapl_cache_t {
+    size_t nlinks;                  /* Number of soft / UD links to traverse (H5L_ACS_NLINKS_NAME) */
+} H5CX_lapl_cache_t;
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+static H5CX_node_t **H5CX__get_context(void);
+static void H5CX__push_common(H5CX_node_t *cnode);
+static H5CX_node_t *H5CX__pop_common(void);
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Package initialization variable */
+hbool_t H5_PKG_INIT_VAR = FALSE;
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+#ifndef H5_HAVE_THREADSAFE
+static H5CX_node_t *H5CX_head_g = NULL;         /* Pointer to head of context stack */
+#endif /* H5_HAVE_THREADSAFE */
+
+/* Define a "default" dataset transfer property list cache structure to use for default DXPLs */
+static H5CX_dxpl_cache_t H5CX_def_dxpl_cache;
+
+/* Define a "default" link access property list cache structure to use for default LAPLs */
+static H5CX_lapl_cache_t H5CX_def_lapl_cache;
+
+/* Declare a static free list to manage H5CX_node_t structs */
+H5FL_DEFINE_STATIC(H5CX_node_t);
+
+
+
+/*--------------------------------------------------------------------------
+NAME
+    H5CX__init_package -- Initialize interface-specific information
+USAGE
+    herr_t H5CX__init_package()
+RETURNS
+    Non-negative on success/Negative on failure
+DESCRIPTION
+    Initializes any interface-specific data or routines.
+--------------------------------------------------------------------------*/
+herr_t
+H5CX__init_package(void)
+{
+    H5P_genplist_t *dx_plist;           /* Data transfer property list */
+    H5P_genplist_t *la_plist;           /* Link access property list */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Reset the "default DXPL cache" information */
+    HDmemset(&H5CX_def_dxpl_cache, 0, sizeof(H5CX_dxpl_cache_t));
+
+    /* Get the default DXPL cache information */
+
+    /* Get the default dataset transfer property list */
+    if(NULL == (dx_plist = (H5P_genplist_t *)H5I_object(H5P_DATASET_XFER_DEFAULT)))
+        HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
+
+    /* Get B-tree split ratios */
+    if(H5P_get(dx_plist, H5D_XFER_BTREE_SPLIT_RATIO_NAME, &H5CX_def_dxpl_cache.btree_split_ratio) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve B-tree split ratios")
+
+    /* Get maximum temporary buffer size value */
+    if(H5P_get(dx_plist, H5D_XFER_MAX_TEMP_BUF_NAME, &H5CX_def_dxpl_cache.max_temp_buf) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve maximum temporary buffer size")
+
+    /* Get temporary buffer pointer */
+    if(H5P_get(dx_plist, H5D_XFER_TCONV_BUF_NAME, &H5CX_def_dxpl_cache.tconv_buf) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve temporary buffer pointer")
+
+    /* Get background buffer pointer */
+    if(H5P_get(dx_plist, H5D_XFER_BKGR_BUF_NAME, &H5CX_def_dxpl_cache.bkgr_buf) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve background buffer pointer")
+
+    /* Get background buffer type */
+    if(H5P_get(dx_plist, H5D_XFER_BKGR_BUF_TYPE_NAME, &H5CX_def_dxpl_cache.bkgr_buf_type) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve background buffer type")
+
+    /* Get I/O vector size */
+    if(H5P_get(dx_plist, H5D_XFER_HYPER_VECTOR_SIZE_NAME, &H5CX_def_dxpl_cache.vec_size) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve I/O vector size")
+
+#ifdef H5_HAVE_PARALLEL
+    /* Collect Parallel I/O information for possible later use */
+    if(H5P_get(dx_plist, H5D_XFER_IO_XFER_MODE_NAME, &H5CX_def_dxpl_cache.io_xfer_mode) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve parallel transfer method")
+    if(H5P_get(dx_plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, &H5CX_def_dxpl_cache.mpio_coll_opt) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve collective transfer option")
+    if(H5P_get(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME, &H5CX_def_dxpl_cache.mpio_chunk_opt_mode) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve chunk optimization option")
+    if(H5P_get(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_NUM_NAME, &H5CX_def_dxpl_cache.mpio_chunk_opt_num) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve chunk optimization threshold")
+    if(H5P_get(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME, &H5CX_def_dxpl_cache.mpio_chunk_opt_ratio) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve chunk optimization ratio")
+
+    /* Get the local & global reasons for breaking collective I/O values */
+    if(H5P_get(dx_plist, H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME, &H5CX_def_dxpl_cache.mpio_local_no_coll_cause) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve local cause for breaking collective I/O")
+    if(H5P_get(dx_plist, H5D_MPIO_GLOBAL_NO_COLLECTIVE_CAUSE_NAME, &H5CX_def_dxpl_cache.mpio_global_no_coll_cause) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve global cause for breaking collective I/O")
+#endif /* H5_HAVE_PARALLEL */
+
+    /* Get error detection properties */
+    if(H5P_get(dx_plist, H5D_XFER_EDC_NAME, &H5CX_def_dxpl_cache.err_detect) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve error detection info")
+
+    /* Get filter callback function */
+    if(H5P_get(dx_plist, H5D_XFER_FILTER_CB_NAME, &H5CX_def_dxpl_cache.filter_cb) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve filter callback function")
+
+    /* Look at the data transform property */
+    /* (Note: 'peek', not 'get' - if this turns out to be a problem, we may need
+     *          to copy it and free this in the H5CX terminate routine. -QAK)
+     */
+    if(H5P_peek(dx_plist, H5D_XFER_XFORM_NAME, &H5CX_def_dxpl_cache.data_transform) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve data transform info")
+
+    /* Get VL datatype alloc info */
+    if(H5P_get(dx_plist, H5D_XFER_VLEN_ALLOC_NAME, &H5CX_def_dxpl_cache.vl_alloc_info.alloc_func) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+    if(H5P_get(dx_plist, H5D_XFER_VLEN_ALLOC_INFO_NAME, &H5CX_def_dxpl_cache.vl_alloc_info.alloc_info) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+    if(H5P_get(dx_plist, H5D_XFER_VLEN_FREE_NAME, &H5CX_def_dxpl_cache.vl_alloc_info.free_func) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+    if(H5P_get(dx_plist, H5D_XFER_VLEN_FREE_INFO_NAME, &H5CX_def_dxpl_cache.vl_alloc_info.free_info) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+
+    /* Get direct chunk read info */
+    if(H5P_get(dx_plist, H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME, &H5CX_def_dxpl_cache.dcr_flag) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve direct chunk read flag")
+    if(H5P_get(dx_plist, H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME, &H5CX_def_dxpl_cache.dcr_offset) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve direct chunk read offset")
+
+    /* Get direct chunk write info */
+    if(H5P_get(dx_plist, H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME, &H5CX_def_dxpl_cache.dcw_flag) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve direct chunk write flag")
+    if(H5P_get(dx_plist, H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_NAME, &H5CX_def_dxpl_cache.dcw_filters) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve direct chunk write filter mask")
+    if(H5P_get(dx_plist, H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_NAME, &H5CX_def_dxpl_cache.dcw_offset) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve direct chunk write offset")
+    if(H5P_get(dx_plist, H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_NAME, &H5CX_def_dxpl_cache.dcw_datasize) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve direct chunk write data size")
+
+    /* Get datatype conversion struct */
+    if(H5P_get(dx_plist, H5D_XFER_CONV_CB_NAME, &H5CX_def_dxpl_cache.dt_conv_cb) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve datatype conversion exception callback")
+
+
+    /* Reset the "default LAPL cache" information */
+    HDmemset(&H5CX_def_lapl_cache, 0, sizeof(H5CX_lapl_cache_t));
+
+    /* Get the default LAPL cache information */
+
+    /* Get the default link access property list */
+    if(NULL == (la_plist = (H5P_genplist_t *)H5I_object(H5P_LINK_ACCESS_DEFAULT)))
+        HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, FAIL, "not a link access property list")
+
+    /* Get number of soft / UD links to traverse */
+    if(H5P_get(la_plist, H5L_ACS_NLINKS_NAME, &H5CX_def_lapl_cache.nlinks) < 0)
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve number of soft / UD links to traverse")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX__init_package() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5CX_term_package
+ *
+ * Purpose:  Terminate this interface.
+ *
+ * Return:   Success:    Positive if anything was done that might
+ *                affect other interfaces; zero otherwise.
+ *            Failure:    Negative.
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 22, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5CX_term_package(void)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    if(H5_PKG_INIT_VAR) {
+        H5CX_node_t *cnode;         /* Context node */
+
+        /* Pop the top context node from the stack */
+        /* (Can't check for errors, as rest of library is shut down) */
+        cnode = H5CX__pop_common();
+
+        /* Free the context node */
+        /* (Allocated with HDmalloc() in H5CX_push_special() ) */
+        HDfree(cnode);
+
+#ifndef H5_HAVE_THREADSAFE
+        H5CX_head_g = NULL;
+#endif /* H5_HAVE_THREADSAFE */
+
+        H5_PKG_INIT_VAR = FALSE;
+    } /* end if */
+
+    FUNC_LEAVE_NOAPI(0)
+} /* end H5CX_term_package() */
+
+
+#ifdef H5_HAVE_THREADSAFE
+/*-------------------------------------------------------------------------
+ * Function:	H5CX__get_context
+ *
+ * Purpose:	Support function for H5CX_get_my_context() to initialize and
+ *              acquire per-thread API context stack.
+ *
+ * Return:	Success: Non-NULL pointer to head pointer of API context stack for thread
+ *		Failure: NULL
+ *
+ * Programmer:	Quincey Koziol
+ *              March 12, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5CX_node_t **
+H5CX__get_context(void)
+{
+    H5CX_node_t **ctx = NULL;
+
+    FUNC_ENTER_STATIC_NOERR
+
+    ctx = (H5CX_node_t **)H5TS_get_thread_local_value(H5TS_apictx_key_g);
+
+    if(!ctx) {
+        /* No associated value with current thread - create one */
+#ifdef H5_HAVE_WIN_THREADS
+        /* Win32 has to use LocalAlloc to match the LocalFree in DllMain */
+        ctx = (H5CX_node_t **)LocalAlloc(LPTR, sizeof(H5CX_node_t *)); 
+#else
+        /* Use HDmalloc here since this has to match the HDfree in the
+         * destructor and we want to avoid the codestack there.
+         */
+        ctx = (H5CX_node_t **)HDmalloc(sizeof(H5CX_node_t *));
+#endif /* H5_HAVE_WIN_THREADS */
+        HDassert(ctx);
+
+        /* Reset the thread-specific info */
+        *ctx = NULL;
+
+        /* (It's not necessary to release this in this API, it is
+         *      released by the "key destructor" set up in the H5TS
+         *      routines.  See calls to pthread_key_create() in H5TS.c -QAK)
+         */
+        H5TS_set_thread_local_value(H5TS_apictx_key_g, (void *)ctx);
+    } /* end if */
+
+    /* Set return value */
+    FUNC_LEAVE_NOAPI(ctx)
+} /* end H5CX__get_context() */
+#endif  /* H5_HAVE_THREADSAFE */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX__push_common
+ *
+ * Purpose:     Internal routine to push a context for an API call.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 22, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+H5CX__push_common(H5CX_node_t *cnode)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Sanity check */
+    HDassert(cnode);
+
+    /* Set non-zero context info */
+    cnode->ctx.dxpl_id = H5P_DATASET_XFER_DEFAULT;
+    cnode->ctx.lapl_id = H5P_LINK_ACCESS_DEFAULT;
+    cnode->ctx.tag = H5AC__INVALID_TAG;
+    cnode->ctx.ring = H5AC_RING_USER;
+
+    /* Push context node onto stack */
+    cnode->next = *head;
+    *head = cnode;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX__push_common() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_push
+ *
+ * Purpose:     Pushes a context for an API call.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 19, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_push(void)
+{
+    H5CX_node_t *cnode = NULL;          /* Context node */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Allocate & clear API context node */
+    if(NULL == (cnode = H5FL_CALLOC(H5CX_node_t)))
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTALLOC, FAIL, "unable to allocate new struct")
+
+    /* Set context info */
+    H5CX__push_common(cnode);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_push() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_push_special
+ *
+ * Purpose:     Pushes a context for an API call, without using library routines.
+ *
+ * Note:	This should only be called in special circumstances, like H5close.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 22, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_push_special(void)
+{
+    H5CX_node_t *cnode;         /* Context node */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Allocate & clear API context node, without using library API routines */
+    cnode = (H5CX_node_t *)HDcalloc(1, sizeof(H5CX_node_t));
+    HDassert(cnode);
+
+    /* Set context info */
+    H5CX__push_common(cnode);
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_push_special() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_is_def_dxpl
+ *
+ * Purpose:     Checks if the API context is using the library's default DXPL
+ *
+ * Return:      TRUE / FALSE (can't fail)
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+hbool_t
+H5CX_is_def_dxpl(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    FUNC_LEAVE_NOAPI((*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT);
+} /* end H5CX_is_def_dxpl() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_dxpl
+ *
+ * Purpose:     Sets the DXPL for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 8, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_dxpl(hid_t dxpl_id)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(*head);
+
+    /* Set the API context's DXPL to a new value */
+    (*head)->ctx.dxpl_id = dxpl_id;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_dxpl() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_lapl
+ *
+ * Purpose:     Sets the LAPL for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 10, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_lapl(hid_t lapl_id)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    /* Set the API context's LAPL to a new value */
+    (*head)->ctx.lapl_id = lapl_id;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_lapl() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_apl
+ *
+ * Purpose:     Validaties an access property list, and sanity checking &
+ *              setting up collective operations.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 19, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_set_apl(hid_t *acspl_id, const H5P_libclass_t *libclass,
+    hid_t
+#ifndef H5_HAVE_PARALLEL
+   H5_ATTR_UNUSED
+#endif /* H5_HAVE_PARALLEL */
+   loc_id, hbool_t
+#ifndef H5_HAVE_PARALLEL
+   H5_ATTR_UNUSED
+#endif /* H5_HAVE_PARALLEL */
+   is_collective)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity checks */
+    HDassert(acspl_id);
+    HDassert(libclass);
+    HDassert(head && *head);
+
+    /* Set access plist to the default property list of the appropriate class if it's the generic default */
+    if(H5P_DEFAULT == *acspl_id)
+        *acspl_id = *libclass->def_plist_id;
+    else {
+        htri_t is_lapl;         /* Whether the access property list is (or is derived from) a link access property list */
+
+#ifdef H5CX_DEBUG
+        /* Sanity check the access property list class */
+        if(TRUE != H5P_isa_class(*acspl_id, *libclass->class_id))
+            HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, FAIL, "not the required access property list")
+#endif /* H5CX_DEBUG*/
+
+        /* Check for link access property and set API context if so */
+        if((is_lapl = H5P_class_isa(*libclass->pclass, *H5P_CLS_LACC->pclass)) < 0)
+            HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "can't check for link access class")
+        else if(is_lapl)
+            (*head)->ctx.lapl_id = *acspl_id;
+
+#ifdef H5_HAVE_PARALLEL
+        /* If this routine is not guaranteed to be collective (i.e. it doesn't
+         * modify the structural metadata in a file), check if we should use
+         * a collective metadata read.
+         */
+        if(!is_collective) {
+            H5P_genplist_t *plist;                  /* Property list pointer */
+            H5P_coll_md_read_flag_t md_coll_read;   /* Collective metadata read flag */
+
+            /* Get the plist structure for the access property list */
+            if(NULL == (plist = (H5P_genplist_t *)H5I_object(*acspl_id)))
+                HGOTO_ERROR(H5E_CONTEXT, H5E_BADATOM, FAIL, "can't find object for ID")
+
+            /* Get the collective metadata read flag */
+            if(H5P_peek(plist, H5_COLL_MD_READ_FLAG_NAME, &md_coll_read) < 0)
+                HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "can't get core collective metadata read flag")
+
+            /* If collective metadata read requested, set collective metadata read flag */
+            if(H5P_USER_TRUE == md_coll_read)
+                is_collective = TRUE;
+        } /* end if */
+#endif /* H5_HAVE_PARALLEL */
+    } /* end else */
+
+#ifdef H5_HAVE_PARALLEL
+    /* Check for collective operation */
+    if(is_collective) {
+        /* Set collective metadata read flag */
+        (*head)->ctx.coll_metadata_read = TRUE;
+
+        /* If parallel is enabled and the file driver used is the MPI-IO
+         * VFD, issue an MPI barrier for easier debugging if the API function
+         * calling this is supposed to be called collectively. Note that this
+         * happens only when the environment variable H5_COLL_BARRIER is set
+         * to non 0.
+         */
+        if(H5_coll_api_sanity_check_g) {
+            MPI_Comm mpi_comm;      /* File communicator */
+
+            /* Retrieve the MPI communicator from the loc_id or the fapl_id */
+            if(H5F_mpi_retrieve_comm(loc_id, *acspl_id, &mpi_comm) < 0)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MPI communicator")
+
+            /* issue the barrier */
+            if(mpi_comm != MPI_COMM_NULL)
+                MPI_Barrier(mpi_comm);
+        } /* end if */
+    } /* end if */
+#endif /* H5_HAVE_PARALLEL */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_set_apl() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_loc
+ *
+ * Purpose:     Sanity checks and sets up collective operations.
+ *
+ * Note:	Should be called for all API routines that modify file
+ *              file metadata but don't pass in an access property list.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 8, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_set_loc(hid_t
+#ifndef H5_HAVE_PARALLEL
+   H5_ATTR_UNUSED
+#endif /* H5_HAVE_PARALLEL */
+   loc_id)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+#ifdef H5_HAVE_PARALLEL
+    /* Set collective metadata read flag */
+    (*head)->ctx.coll_metadata_read = TRUE;
+
+    /* If parallel is enabled and the file driver used is the MPI-IO
+     * VFD, issue an MPI barrier for easier debugging if the API function
+     * calling this is supposed to be called collectively. Note that this
+     * happens only when the environment variable H5_COLL_BARRIER is set
+     * to non 0.
+     */
+    if(H5_coll_api_sanity_check_g) {
+        MPI_Comm mpi_comm;      /* File communicator */
+
+        /* Retrieve the MPI communicator from the loc_id or the fapl_id */
+        if(H5F_mpi_retrieve_comm(loc_id, H5P_DEFAULT, &mpi_comm) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MPI communicator")
+
+        /* issue the barrier */
+        if(mpi_comm != MPI_COMM_NULL)
+            MPI_Barrier(mpi_comm);
+    } /* end if */
+#endif /* H5_HAVE_PARALLEL */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_set_loc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dxpl
+ *
+ * Purpose:     Retrieves the DXPL ID for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 20, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5CX_get_dxpl(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    FUNC_LEAVE_NOAPI((*head)->ctx.dxpl_id)
+} /* end H5CX_get_dxpl() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_lapl
+ *
+ * Purpose:     Retrieves the LAPL ID for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 10, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5CX_get_lapl(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    FUNC_LEAVE_NOAPI((*head)->ctx.lapl_id)
+} /* end H5CX_get_lapl() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_tag
+ *
+ * Purpose:     Retrieves the object tag for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 20, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+haddr_t
+H5CX_get_tag(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    FUNC_LEAVE_NOAPI((*head)->ctx.tag)
+} /* end H5CX_get_tag() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_ring
+ *
+ * Purpose:     Retrieves the metadata cache ring for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 22, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+H5AC_ring_t
+H5CX_get_ring(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    FUNC_LEAVE_NOAPI((*head)->ctx.ring)
+} /* end H5CX_get_ring() */
+
+#ifdef H5_HAVE_PARALLEL
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_coll_metadata_read
+ *
+ * Purpose:     Retrieves the "do collective metadata reads" flag for the current API call context.
+ *
+ * Return:      TRUE / FALSE on success / <can't fail>
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 23, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+hbool_t
+H5CX_get_coll_metadata_read(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    FUNC_LEAVE_NOAPI((*head)->ctx.coll_metadata_read)
+} /* end H5CX_get_coll_metadata_read() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpi_coll_datatypes
+ *
+ * Purpose:     Retrieves the MPI datatypes for collective I/O for the current API call context.
+ *
+ * Note:	This is only a shallow copy, the datatypes are not duplicated.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_mpi_coll_datatypes(MPI_Datatype *btype, MPI_Datatype *ftype)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(btype);
+    HDassert(ftype);
+    HDassert(head && *head);
+
+    /* Set the API context values */
+    *btype = (*head)->ctx.btype;
+    *ftype = (*head)->ctx.ftype;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_mpi_coll_datatypes() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpi_file_flushing
+ *
+ * Purpose:     Retrieves the "flushing an MPI-opened file" flag for the current API call context.
+ *
+ * Return:      TRUE / FALSE on success / <can't fail>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 17, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+hbool_t
+H5CX_get_mpi_file_flushing(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    FUNC_LEAVE_NOAPI((*head)->ctx.mpi_file_flushing)
+} /* end H5CX_get_mpi_file_flushing() */
+#endif /* H5_HAVE_PARALLEL */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_btree_split_ratios
+ *
+ * Purpose:     Retrieves the B-tree split ratios for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 23, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_btree_split_ratios(double split_ratio[3])
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(split_ratio);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_BTREE_SPLIT_RATIO_NAME, btree_split_ratio)
+
+    /* Get the B-tree split ratio values */
+    HDmemcpy(split_ratio, &(*head)->ctx.btree_split_ratio, sizeof((*head)->ctx.btree_split_ratio));
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_btree_split_ratios() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_max_temp_buf
+ *
+ * Purpose:     Retrieves the maximum temporary buffer size for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 25, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_max_temp_buf(size_t *max_temp_buf)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(max_temp_buf);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_MAX_TEMP_BUF_NAME, max_temp_buf)
+
+    /* Get the value */
+    *max_temp_buf = (*head)->ctx.max_temp_buf;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_max_temp_buf() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_tconv_buf
+ *
+ * Purpose:     Retrieves the temporary buffer pointer for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 25, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_tconv_buf(void **tconv_buf)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(tconv_buf);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_TCONV_BUF_NAME, tconv_buf)
+
+    /* Get the value */
+    *tconv_buf = (*head)->ctx.tconv_buf;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_tconv_buf() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_bkgr_buf
+ *
+ * Purpose:     Retrieves the background buffer pointer for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 25, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_bkgr_buf(void **bkgr_buf)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(bkgr_buf);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_BKGR_BUF_NAME, bkgr_buf)
+
+    /* Get the value */
+    *bkgr_buf = (*head)->ctx.bkgr_buf;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_bkgr_buf() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_bkgr_buf_type
+ *
+ * Purpose:     Retrieves the background buffer type for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 25, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_bkgr_buf_type(H5T_bkg_t *bkgr_buf_type)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(bkgr_buf_type);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_BKGR_BUF_TYPE_NAME, bkgr_buf_type)
+
+    /* Get the value */
+    *bkgr_buf_type = (*head)->ctx.bkgr_buf_type;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_bkgr_buf_type() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_vec_size
+ *
+ * Purpose:     Retrieves the hyperslab vector size for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 25, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_vec_size(size_t *vec_size)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(vec_size);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_HYPER_VECTOR_SIZE_NAME, vec_size)
+
+    /* Get the value */
+    *vec_size = (*head)->ctx.vec_size;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_vec_size() */
+
+#ifdef H5_HAVE_PARALLEL
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_io_xfer_mode
+ *
+ * Purpose:     Retrieves the parallel transfer mode for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 25, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_io_xfer_mode(H5FD_mpio_xfer_t *io_xfer_mode)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(io_xfer_mode);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_IO_XFER_MODE_NAME, io_xfer_mode)
+
+    /* Get the value */
+    *io_xfer_mode = (*head)->ctx.io_xfer_mode;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_io_xfer_mode() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpio_coll_opt
+ *
+ * Purpose:     Retrieves the collective / independent parallel I/O option for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_mpio_coll_opt(H5FD_mpio_collective_opt_t *mpio_coll_opt)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(mpio_coll_opt);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, mpio_coll_opt)
+
+    /* Get the value */
+    *mpio_coll_opt = (*head)->ctx.mpio_coll_opt;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_mpio_coll_opt() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpio_local_no_coll_cause
+ *
+ * Purpose:     Retrieves the local cause for breaking collective I/O for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_mpio_local_no_coll_cause(uint32_t *mpio_local_no_coll_cause)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(mpio_local_no_coll_cause);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID_SET(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME, mpio_local_no_coll_cause)
+
+    /* Get the value */
+    *mpio_local_no_coll_cause = (*head)->ctx.mpio_local_no_coll_cause;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_mpio_local_no_coll_cause() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpio_global_no_coll_cause
+ *
+ * Purpose:     Retrieves the global cause for breaking collective I/O for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_mpio_global_no_coll_cause(uint32_t *mpio_global_no_coll_cause)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(mpio_global_no_coll_cause);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID_SET(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_MPIO_GLOBAL_NO_COLLECTIVE_CAUSE_NAME, mpio_global_no_coll_cause)
+
+    /* Get the value */
+    *mpio_global_no_coll_cause = (*head)->ctx.mpio_global_no_coll_cause;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_mpio_global_no_coll_cause() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpio_chunk_opt_mode
+ *
+ * Purpose:     Retrieves the collective chunk optimization mode for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_mpio_chunk_opt_mode(H5FD_mpio_chunk_opt_t *mpio_chunk_opt_mode)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(mpio_chunk_opt_mode);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME, mpio_chunk_opt_mode)
+
+    /* Get the value */
+    *mpio_chunk_opt_mode = (*head)->ctx.mpio_chunk_opt_mode;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_mpio_chunk_opt_mode() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpio_chunk_opt_num
+ *
+ * Purpose:     Retrieves the collective chunk optimization threshold for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_mpio_chunk_opt_num(unsigned *mpio_chunk_opt_num)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(mpio_chunk_opt_num);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_MPIO_CHUNK_OPT_NUM_NAME, mpio_chunk_opt_num)
+
+    /* Get the value */
+    *mpio_chunk_opt_num = (*head)->ctx.mpio_chunk_opt_num;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_mpio_chunk_opt_num() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_mpio_chunk_opt_ratio
+ *
+ * Purpose:     Retrieves the collective chunk optimization ratio for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_mpio_chunk_opt_ratio(unsigned *mpio_chunk_opt_ratio)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(mpio_chunk_opt_ratio);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME, mpio_chunk_opt_ratio)
+
+    /* Get the value */
+    *mpio_chunk_opt_ratio = (*head)->ctx.mpio_chunk_opt_ratio;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_mpio_chunk_opt_ratio() */
+#endif /* H5_HAVE_PARALLEL */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_err_detect
+ *
+ * Purpose:     Retrieves the error detection info for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_err_detect(H5Z_EDC_t *err_detect)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(err_detect);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_EDC_NAME, err_detect)
+
+    /* Get the value */
+    *err_detect = (*head)->ctx.err_detect;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_err_detect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_filter_cb
+ *
+ * Purpose:     Retrieves the I/O filter callback function for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_filter_cb(H5Z_cb_t *filter_cb)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(filter_cb);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_FILTER_CB_NAME, filter_cb)
+
+    /* Get the value */
+    *filter_cb = (*head)->ctx.filter_cb;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_filter_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_data_transform
+ *
+ * Purpose:     Retrieves the I/O filter callback function for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_data_transform(H5Z_data_xform_t **data_transform)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(data_transform);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    /* Check if the value has been retrieved already */
+    if(!(*head)->ctx.data_transform_valid) {
+        /* Check for default DXPL */
+        if((*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT)
+            (*head)->ctx.data_transform = H5CX_def_dxpl_cache.data_transform;
+        else {
+            /* Check if the property list is already available */
+            if(NULL == (*head)->ctx.dxpl)
+                /* Get the dataset transfer property list pointer */
+                if(NULL == ((*head)->ctx.dxpl = (H5P_genplist_t *)H5I_object((*head)->ctx.dxpl_id)))
+                    HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, FAIL, "can't get default dataset transfer property list")
+
+            /* Get data transform info value */
+            /* (Note: 'peek', not 'get' - if this turns out to be a problem, we may need
+             *          to copy it and free this in the H5CX pop routine. -QAK)
+             */
+            if(H5P_peek((*head)->ctx.dxpl, H5D_XFER_XFORM_NAME, &(*head)->ctx.data_transform) < 0)
+                HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve data transform info")
+        } /* end else */
+
+        /* Mark the value as valid */
+        (*head)->ctx.data_transform_valid = TRUE;
+    } /* end if */
+
+    /* Get the value */
+    *data_transform = (*head)->ctx.data_transform;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_data_transform() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_vlen_alloc_info
+ *
+ * Purpose:     Retrieves the VL datatype alloc info for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 5, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_vlen_alloc_info(H5T_vlen_alloc_info_t *vl_alloc_info)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(vl_alloc_info);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    /* Check if the value has been retrieved already */
+    if(!(*head)->ctx.vl_alloc_info_valid) {
+        /* Check for default DXPL */
+        if((*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT)
+            (*head)->ctx.vl_alloc_info = H5CX_def_dxpl_cache.vl_alloc_info;
+        else {
+            /* Check if the property list is already available */
+            if(NULL == (*head)->ctx.dxpl)
+                /* Get the dataset transfer property list pointer */
+                if(NULL == ((*head)->ctx.dxpl = (H5P_genplist_t *)H5I_object((*head)->ctx.dxpl_id)))
+                    HGOTO_ERROR(H5E_CONTEXT, H5E_BADTYPE, FAIL, "can't get default dataset transfer property list")
+
+            /* Get VL datatype alloc info values */
+            if(H5P_get((*head)->ctx.dxpl, H5D_XFER_VLEN_ALLOC_NAME, &(*head)->ctx.vl_alloc_info.alloc_func) < 0)
+                HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+            if(H5P_get((*head)->ctx.dxpl, H5D_XFER_VLEN_ALLOC_INFO_NAME, &(*head)->ctx.vl_alloc_info.alloc_info) < 0)
+                HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+            if(H5P_get((*head)->ctx.dxpl, H5D_XFER_VLEN_FREE_NAME, &(*head)->ctx.vl_alloc_info.free_func) < 0)
+                HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+            if(H5P_get((*head)->ctx.dxpl, H5D_XFER_VLEN_FREE_INFO_NAME, &(*head)->ctx.vl_alloc_info.free_info) < 0)
+                HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "Can't retrieve VL datatype alloc info")
+        } /* end else */
+
+        /* Mark the value as valid */
+        (*head)->ctx.vl_alloc_info_valid = TRUE;
+    } /* end if */
+
+    /* Get the value */
+    *vl_alloc_info = (*head)->ctx.vl_alloc_info;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_vlen_alloc_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dcr_flag
+ *
+ * Purpose:     Retrieves the direct chunk read flag for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_dcr_flag(hbool_t *dcr_flag)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dcr_flag);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME, dcr_flag)
+
+    /* Get the value */
+    *dcr_flag = (*head)->ctx.dcr_flag;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_dcr_flag() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dcr_offset
+ *
+ * Purpose:     Retrieves the direct chunk read offset for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_dcr_offset(hsize_t **dcr_offset)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dcr_offset);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME, dcr_offset)
+
+    /* Get the value */
+    *dcr_offset = (*head)->ctx.dcr_offset;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_dcr_offset() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dcw_flag
+ *
+ * Purpose:     Retrieves the direct chunk write flag for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_dcw_flag(hbool_t *dcw_flag)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dcw_flag);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME, dcw_flag)
+
+    /* Get the value */
+    *dcw_flag = (*head)->ctx.dcw_flag;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_dcw_flag() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dcw_filters
+ *
+ * Purpose:     Retrieves the direct chunk write filter mask for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_dcw_filters(uint32_t *dcw_filters)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dcw_filters);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_NAME, dcw_filters)
+
+    /* Get the value */
+    *dcw_filters = (*head)->ctx.dcw_filters;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_dcw_filters() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dcw_offset
+ *
+ * Purpose:     Retrieves the direct chunk write offset for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_dcw_offset(hsize_t **dcw_offset)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dcw_offset);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_NAME, dcw_offset)
+
+    /* Get the value */
+    *dcw_offset = (*head)->ctx.dcw_offset;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_dcw_offset() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dcw_datasize
+ *
+ * Purpose:     Retrieves the direct chunk write data size for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_dcw_datasize(uint32_t *dcw_datasize)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dcw_datasize);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_NAME, dcw_datasize)
+
+    /* Get the value */
+    *dcw_datasize = (*head)->ctx.dcw_datasize;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_dcw_datasize() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_dt_conv_cb
+ *
+ * Purpose:     Retrieves the datatype conversion exception callback for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 8, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_dt_conv_cb(H5T_conv_cb_t *dt_conv_cb)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dt_conv_cb);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_CONV_CB_NAME, dt_conv_cb)
+
+    /* Get the value */
+    *dt_conv_cb = (*head)->ctx.dt_conv_cb;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_dt_conv_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_get_nlinks
+ *
+ * Purpose:     Retrieves the # of soft / UD links to traverse for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 10, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_get_nlinks(size_t *nlinks)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(nlinks);
+    HDassert(head && *head);
+    HDassert(H5P_DEFAULT != (*head)->ctx.dxpl_id);
+
+    H5CX_RETRIEVE_PROP_VALID(lapl, H5P_LINK_ACCESS_DEFAULT, H5L_ACS_NLINKS_NAME, nlinks)
+
+    /* Get the value */
+    *nlinks = (*head)->ctx.nlinks;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_get_nlinks() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_tag
+ *
+ * Purpose:     Sets the object tag for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 20, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_tag(haddr_t tag)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    (*head)->ctx.tag = tag;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_tag() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_ring
+ *
+ * Purpose:     Sets the metadata cache ring for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 20, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_ring(H5AC_ring_t ring)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    (*head)->ctx.ring = ring;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_ring() */
+
+#ifdef H5_HAVE_PARALLEL
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_coll_metadata_read
+ *
+ * Purpose:     Sets the "do collective metadata reads" flag for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 23, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_coll_metadata_read(hbool_t cmdr)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    (*head)->ctx.coll_metadata_read = cmdr;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_coll_metadata_read() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_mpi_coll_datatypes
+ *
+ * Purpose:     Sets the MPI datatypes for collective I/O for the current API call context.
+ *
+ * Note:	This is only a shallow copy, the datatypes are not duplicated.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_set_mpi_coll_datatypes(MPI_Datatype btype, MPI_Datatype ftype)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    /* Set the API context values */
+    (*head)->ctx.btype = btype;
+    (*head)->ctx.ftype = ftype;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_set_mpi_coll_datatypes() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_io_xfer_mode
+ *
+ * Purpose:     Sets the parallel transfer mode for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_set_io_xfer_mode(H5FD_mpio_xfer_t io_xfer_mode)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    /* Set the API context value */
+    (*head)->ctx.io_xfer_mode = io_xfer_mode;
+
+    /* Mark the value as valid */
+    (*head)->ctx.io_xfer_mode_valid = TRUE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_set_io_xfer_mode() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_mpio_coll_opt
+ *
+ * Purpose:     Sets the parallel transfer mode for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 26, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_set_mpio_coll_opt(H5FD_mpio_collective_opt_t mpio_coll_opt)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    /* Set the API context value */
+    (*head)->ctx.mpio_coll_opt = mpio_coll_opt;
+
+    /* Mark the value as valid */
+    (*head)->ctx.mpio_coll_opt_valid = TRUE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_set_mpio_coll_opt() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_mpi_file_flushing
+ *
+ * Purpose:     Sets the "flushing an MPI-opened file" flag for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 170 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_mpi_file_flushing(hbool_t flushing)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    (*head)->ctx.mpi_file_flushing = flushing;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_mpi_file_flushing() */
+#endif /* H5_HAVE_PARALLEL */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_vlen_alloc_info
+ *
+ * Purpose:     Sets the VL datatype alloc info for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_set_vlen_alloc_info(H5MM_allocate_t alloc_func,
+    void *alloc_info, H5MM_free_t free_func, void *free_info)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    /* Set the API context value */
+    (*head)->ctx.vl_alloc_info.alloc_func = alloc_func;
+    (*head)->ctx.vl_alloc_info.alloc_info = alloc_info;
+    (*head)->ctx.vl_alloc_info.free_func = free_func;
+    (*head)->ctx.vl_alloc_info.free_info = free_info;
+
+    /* Mark the value as valid */
+    (*head)->ctx.vl_alloc_info_valid = TRUE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_set_vlen_alloc_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_nlinks
+ *
+ * Purpose:     Sets the # of soft / UD links to traverse for the current API call context.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 10, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_set_nlinks(size_t nlinks)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    /* Set the API context value */
+    (*head)->ctx.nlinks = nlinks;
+
+    /* Mark the value as valid */
+    (*head)->ctx.nlinks_valid = TRUE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_set_nlinks() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_dcr_filters
+ *
+ * Purpose:     Sets the direct chunk read filter flags for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_dcr_filters(uint32_t direct_filters)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    /* Cache the filter mask for later, marking it to set in DXPL when context popped */
+    (*head)->ctx.dcr_filters = direct_filters;
+    (*head)->ctx.dcr_filters_set = TRUE;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_dcr_filters() */
+
+#ifdef H5_HAVE_PARALLEL
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_mpio_actual_chunk_opt
+ *
+ * Purpose:     Sets the actual chunk optimization used for parallel I/O for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_mpio_actual_chunk_opt(H5D_mpio_actual_chunk_opt_mode_t mpio_actual_chunk_opt)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    /* Cache the value for later, marking it to set in DXPL when context popped */
+    (*head)->ctx.mpio_actual_chunk_opt = mpio_actual_chunk_opt;
+    (*head)->ctx.mpio_actual_chunk_opt_set = TRUE;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_mpio_actual_chunk_opt() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_mpio_actual_io_mode
+ *
+ * Purpose:     Sets the actual I/O mode used for parallel I/O for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_mpio_actual_io_mode(H5D_mpio_actual_io_mode_t mpio_actual_io_mode)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    /* Cache the value for later, marking it to set in DXPL when context popped */
+    (*head)->ctx.mpio_actual_io_mode = mpio_actual_io_mode;
+    (*head)->ctx.mpio_actual_io_mode_set = TRUE;
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_mpio_actual_chunk_opt() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_mpio_local_no_coll_cause
+ *
+ * Purpose:     Sets the local reason for breaking collective I/O for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_mpio_local_no_coll_cause(uint32_t mpio_local_no_coll_cause)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert((*head)->ctx.dxpl_id != H5P_DEFAULT);
+
+    /* If we're using the default DXPL, don't modify it */
+    if((*head)->ctx.dxpl_id != H5P_DATASET_XFER_DEFAULT) {
+        /* Cache the value for later, marking it to set in DXPL when context popped */
+        (*head)->ctx.mpio_local_no_coll_cause = mpio_local_no_coll_cause;
+        (*head)->ctx.mpio_local_no_coll_cause_set = TRUE;
+    } /* end if */
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_mpio_local_no_coll_cause() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_set_mpio_global_no_coll_cause
+ *
+ * Purpose:     Sets the global reason for breaking collective I/O for the current API call context.
+ *
+ * Return:      <none>
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5CX_set_mpio_global_no_coll_cause(uint32_t mpio_global_no_coll_cause)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert((*head)->ctx.dxpl_id != H5P_DEFAULT);
+
+    /* If we're using the default DXPL, don't modify it */
+    if((*head)->ctx.dxpl_id != H5P_DATASET_XFER_DEFAULT) {
+        /* Cache the value for later, marking it to set in DXPL when context popped */
+        (*head)->ctx.mpio_global_no_coll_cause = mpio_global_no_coll_cause;
+        (*head)->ctx.mpio_global_no_coll_cause_set = TRUE;
+    } /* end if */
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5CX_set_mpio_global_no_coll_cause() */
+
+#ifdef H5_HAVE_INSTRUMENTED_LIBRARY
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_test_set_mpio_coll_chunk_link_hard
+ *
+ * Purpose:     Sets the instrumented "collective chunk link hard" value for the current API call context.
+ *
+ * Note:        Only sets value if property set in DXPL
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_test_set_mpio_coll_chunk_link_hard(int mpio_coll_chunk_link_hard)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    H5CX_TEST_SET_PROP(H5D_XFER_COLL_CHUNK_LINK_HARD_NAME, mpio_coll_chunk_link_hard)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_test_set_mpio_coll_chunk_link_hard() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_test_set_mpio_coll_chunk_multi_hard
+ *
+ * Purpose:     Sets the instrumented "collective chunk multi hard" value for the current API call context.
+ *
+ * Note:        Only sets value if property set in DXPL
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_test_set_mpio_coll_chunk_multi_hard(int mpio_coll_chunk_multi_hard)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    H5CX_TEST_SET_PROP(H5D_XFER_COLL_CHUNK_MULTI_HARD_NAME, mpio_coll_chunk_multi_hard)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_test_set_mpio_coll_chunk_multi_hard() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_test_set_mpio_coll_chunk_link_num_true
+ *
+ * Purpose:     Sets the instrumented "collective chunk link num tru" value for the current API call context.
+ *
+ * Note:        Only sets value if property set in DXPL
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_test_set_mpio_coll_chunk_link_num_true(int mpio_coll_chunk_link_num_true)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    H5CX_TEST_SET_PROP(H5D_XFER_COLL_CHUNK_LINK_NUM_TRUE_NAME, mpio_coll_chunk_link_num_true)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_test_set_mpio_coll_chunk_link_num_true() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_test_set_mpio_coll_chunk_link_num_false
+ *
+ * Purpose:     Sets the instrumented "collective chunk link num false" value for the current API call context.
+ *
+ * Note:        Only sets value if property set in DXPL
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_test_set_mpio_coll_chunk_link_num_false(int mpio_coll_chunk_link_num_false)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    H5CX_TEST_SET_PROP(H5D_XFER_COLL_CHUNK_LINK_NUM_FALSE_NAME, mpio_coll_chunk_link_num_false)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_test_set_mpio_coll_chunk_link_num_false() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_test_set_mpio_coll_chunk_multi_ratio_coll
+ *
+ * Purpose:     Sets the instrumented "collective chunk multi ratio coll" value for the current API call context.
+ *
+ * Note:        Only sets value if property set in DXPL
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_test_set_mpio_coll_chunk_multi_ratio_coll(int mpio_coll_chunk_multi_ratio_coll)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    H5CX_TEST_SET_PROP(H5D_XFER_COLL_CHUNK_MULTI_RATIO_COLL_NAME, mpio_coll_chunk_multi_ratio_coll)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_test_set_mpio_coll_chunk_multi_ratio_coll() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_test_set_mpio_coll_chunk_multi_ratio_ind
+ *
+ * Purpose:     Sets the instrumented "collective chunk multi ratio ind" value for the current API call context.
+ *
+ * Note:        Only sets value if property set in DXPL
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_test_set_mpio_coll_chunk_multi_ratio_ind(int mpio_coll_chunk_multi_ratio_ind)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Sanity checks */
+    HDassert(head && *head);
+    HDassert(!((*head)->ctx.dxpl_id == H5P_DEFAULT || 
+            (*head)->ctx.dxpl_id == H5P_DATASET_XFER_DEFAULT));
+
+    H5CX_TEST_SET_PROP(H5D_XFER_COLL_CHUNK_MULTI_RATIO_IND_NAME, mpio_coll_chunk_multi_ratio_ind)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_test_set_mpio_coll_chunk_multi_ratio_ind() */
+#endif /* H5_HAVE_INSTRUMENTED_LIBRARY */
+#endif /* H5_HAVE_PARALLEL */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX__pop_common
+ *
+ * Purpose:     Common code for popping the context for an API call.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              March 6, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5CX_node_t *
+H5CX__pop_common(void)
+{
+    H5CX_node_t **head = H5CX_get_my_context();  /* Get the pointer to the head of the API context, for this thread */
+    H5CX_node_t *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity check */
+    HDassert(head && *head);
+
+    /* Check for cached DXPL properties to return to application */
+    H5CX_SET_PROP(H5D_XFER_DIRECT_CHUNK_READ_FILTERS_NAME, dcr_filters)
+#ifdef H5_HAVE_PARALLEL
+    H5CX_SET_PROP(H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, mpio_actual_chunk_opt)
+    H5CX_SET_PROP(H5D_MPIO_ACTUAL_IO_MODE_NAME, mpio_actual_io_mode)
+    H5CX_SET_PROP(H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME, mpio_local_no_coll_cause)
+    H5CX_SET_PROP(H5D_MPIO_GLOBAL_NO_COLLECTIVE_CAUSE_NAME, mpio_global_no_coll_cause)
+#ifdef H5_HAVE_INSTRUMENTED_LIBRARY
+    H5CX_SET_PROP(H5D_XFER_COLL_CHUNK_LINK_HARD_NAME, mpio_coll_chunk_link_hard)
+    H5CX_SET_PROP(H5D_XFER_COLL_CHUNK_MULTI_HARD_NAME, mpio_coll_chunk_multi_hard)
+    H5CX_SET_PROP(H5D_XFER_COLL_CHUNK_LINK_NUM_TRUE_NAME, mpio_coll_chunk_link_num_true)
+    H5CX_SET_PROP(H5D_XFER_COLL_CHUNK_LINK_NUM_FALSE_NAME, mpio_coll_chunk_link_num_false)
+    H5CX_SET_PROP(H5D_XFER_COLL_CHUNK_MULTI_RATIO_COLL_NAME, mpio_coll_chunk_multi_ratio_coll)
+    H5CX_SET_PROP(H5D_XFER_COLL_CHUNK_MULTI_RATIO_IND_NAME, mpio_coll_chunk_multi_ratio_ind)
+#endif /* H5_HAVE_INSTRUMENTED_LIBRARY */
+#endif /* H5_HAVE_PARALLEL */
+
+    /* Pop the top context node from the stack */
+    ret_value = (*head);
+    (*head) = (*head)->next;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX__pop_common() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5CX_pop
+ *
+ * Purpose:     Pops the context for an API call.
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Februrary 19, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5CX_pop(void)
+{
+    H5CX_node_t *cnode;                 /* Context node */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Perform common operations and get top context from stack */
+    if(NULL == (cnode = H5CX__pop_common()))
+        HGOTO_ERROR(H5E_CONTEXT, H5E_CANTGET, FAIL, "error getting API context node")
+
+    /* Free the context node */
+    cnode = H5FL_FREE(H5CX_node_t, cnode);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5CX_pop() */
+
diff --git a/src/H5CXmodule.h b/src/H5CXmodule.h
new file mode 100644
index 0000000..f6a8f29
--- /dev/null
+++ b/src/H5CXmodule.h
@@ -0,0 +1,33 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Programmer:	Quincey Koziol <koziol@lbl.gov>
+ *		Sunday, February 25, 2018
+ *
+ * Purpose:	This file contains declarations which define macros for the
+ *		H5CX package.  Including this header means that the source file
+ *		is part of the H5CX package.
+ */
+#ifndef _H5CXmodule_H
+#define _H5CXmodule_H
+
+/* Define the proper control macros for the generic FUNC_ENTER/LEAVE and error
+ *      reporting macros.
+ */
+#define H5CX_MODULE
+#define H5_MY_PKG       H5CX
+#define H5_MY_PKG_ERR   H5E_CONTEXT
+#define H5_MY_PKG_INIT  YES
+
+#endif /* _H5CXmodule_H */
+
diff --git a/src/H5CXprivate.h b/src/H5CXprivate.h
new file mode 100644
index 0000000..3566f11
--- /dev/null
+++ b/src/H5CXprivate.h
@@ -0,0 +1,147 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ *  Header file for API contexts, etc.
+ */
+#ifndef _H5CXprivate_H
+#define _H5CXprivate_H
+
+/* Include package's public header */
+#ifdef NOT_YET
+#include "H5CXpublic.h"
+#endif /* NOT_YET */
+
+/* Private headers needed by this file */
+#include "H5private.h"          /* Generic Functions                    */
+#include "H5ACprivate.h"        /* Metadata cache                       */
+#ifdef H5_HAVE_PARALLEL
+#include "H5FDprivate.h"        /* File drivers                         */
+#endif /* H5_HAVE_PARALLEL */
+#include "H5Zprivate.h"         /* Data filters                         */
+
+
+/**************************/
+/* Library Private Macros */
+/**************************/
+
+
+/****************************/
+/* Library Private Typedefs */
+/****************************/
+
+
+/*****************************/
+/* Library-private Variables */
+/*****************************/
+
+
+/***************************************/
+/* Library-private Function Prototypes */
+/***************************************/
+
+/* Library private routines */
+#ifndef _H5private_H
+H5_DLL herr_t H5CX_push(void);
+H5_DLL herr_t H5CX_pop(void);
+#endif  /* _H5private_H */
+H5_DLL void H5CX_push_special(void);
+H5_DLL hbool_t H5CX_is_def_dxpl(void);
+
+/* "Setter" routines for API context info */
+H5_DLL void H5CX_set_dxpl(hid_t dxpl_id);
+H5_DLL void H5CX_set_lapl(hid_t lapl_id);
+H5_DLL herr_t H5CX_set_apl(hid_t *acspl_id, const H5P_libclass_t *libclass,
+    hid_t loc_id, hbool_t is_collective);
+H5_DLL herr_t H5CX_set_loc(hid_t loc_id);
+
+/* "Getter" routines for API context info */
+H5_DLL hid_t H5CX_get_dxpl(void);
+H5_DLL hid_t H5CX_get_lapl(void);
+H5_DLL haddr_t H5CX_get_tag(void);
+H5_DLL H5AC_ring_t H5CX_get_ring(void);
+#ifdef H5_HAVE_PARALLEL
+H5_DLL hbool_t H5CX_get_coll_metadata_read(void);
+H5_DLL herr_t H5CX_get_mpi_coll_datatypes(MPI_Datatype *btype, MPI_Datatype *ftype);
+H5_DLL hbool_t H5CX_get_mpi_file_flushing(void);
+#endif /* H5_HAVE_PARALLEL */
+
+/* "Getter" routines for DXPL properties cached in API context */
+H5_DLL herr_t H5CX_get_btree_split_ratios(double split_ratio[3]);
+H5_DLL herr_t H5CX_get_max_temp_buf(size_t *max_temp_buf);
+H5_DLL herr_t H5CX_get_tconv_buf(void **tconv_buf);
+H5_DLL herr_t H5CX_get_bkgr_buf(void **bkgr_buf);
+H5_DLL herr_t H5CX_get_bkgr_buf_type(H5T_bkg_t *bkgr_buf_type);
+H5_DLL herr_t H5CX_get_vec_size(size_t *vec_size);
+#ifdef H5_HAVE_PARALLEL
+H5_DLL herr_t H5CX_get_io_xfer_mode(H5FD_mpio_xfer_t *io_xfer_mode);
+H5_DLL herr_t H5CX_get_mpio_coll_opt(H5FD_mpio_collective_opt_t *mpio_coll_opt);
+H5_DLL herr_t H5CX_get_mpio_local_no_coll_cause(uint32_t *mpio_local_no_coll_cause);
+H5_DLL herr_t H5CX_get_mpio_global_no_coll_cause(uint32_t *mpio_global_no_coll_cause);
+H5_DLL herr_t H5CX_get_mpio_chunk_opt_mode(H5FD_mpio_chunk_opt_t *mpio_chunk_opt_mode);
+H5_DLL herr_t H5CX_get_mpio_chunk_opt_num(unsigned *mpio_chunk_opt_num);
+H5_DLL herr_t H5CX_get_mpio_chunk_opt_ratio(unsigned *mpio_chunk_opt_ratio);
+#endif /* H5_HAVE_PARALLEL */
+H5_DLL herr_t H5CX_get_err_detect(H5Z_EDC_t *err_detect);
+H5_DLL herr_t H5CX_get_filter_cb(H5Z_cb_t *filter_cb);
+H5_DLL herr_t H5CX_get_data_transform(H5Z_data_xform_t **data_transform);
+H5_DLL herr_t H5CX_get_vlen_alloc_info(H5T_vlen_alloc_info_t *vl_alloc_info);
+H5_DLL herr_t H5CX_get_dcr_flag(hbool_t *direct_read);
+H5_DLL herr_t H5CX_get_dcr_offset(hsize_t **direct_offset);
+H5_DLL herr_t H5CX_get_dcw_flag(hbool_t *direct_write);
+H5_DLL herr_t H5CX_get_dcw_filters(uint32_t *direct_filters);
+H5_DLL herr_t H5CX_get_dcw_offset(hsize_t **direct_offset);
+H5_DLL herr_t H5CX_get_dcw_datasize(uint32_t *direct_datasize);
+H5_DLL herr_t H5CX_get_dt_conv_cb(H5T_conv_cb_t *cb_struct);
+
+/* "Getter" routines for LAPL properties cached in API context */
+H5_DLL herr_t H5CX_get_nlinks(size_t *nlinks);
+
+/* "Setter" routines for API context info */
+H5_DLL void H5CX_set_tag(haddr_t tag);
+H5_DLL void H5CX_set_ring(H5AC_ring_t ring);
+#ifdef H5_HAVE_PARALLEL
+H5_DLL void H5CX_set_coll_metadata_read(hbool_t cmdr);
+H5_DLL herr_t H5CX_set_mpi_coll_datatypes(MPI_Datatype btype, MPI_Datatype ftype);
+H5_DLL herr_t H5CX_set_mpio_coll_opt(H5FD_mpio_collective_opt_t mpio_coll_opt);
+H5_DLL void H5CX_set_mpi_file_flushing(hbool_t flushing);
+#endif /* H5_HAVE_PARALLEL */
+
+/* "Setter" routines for DXPL properties cached in API context */
+#ifdef H5_HAVE_PARALLEL
+H5_DLL herr_t H5CX_set_io_xfer_mode(H5FD_mpio_xfer_t io_xfer_mode);
+#endif /* H5_HAVE_PARALLEL */
+H5_DLL herr_t H5CX_set_vlen_alloc_info(H5MM_allocate_t alloc_func,
+    void *alloc_info, H5MM_free_t free_func, void *free_info);
+
+/* "Setter" routines for LAPL properties cached in API context */
+H5_DLL herr_t H5CX_set_nlinks(size_t nlinks);
+
+/* "Setter" routines for cached DXPL properties that must be returned to application */
+H5_DLL void H5CX_set_dcr_filters(uint32_t direct_filters);
+#ifdef H5_HAVE_PARALLEL
+H5_DLL void H5CX_set_mpio_actual_chunk_opt(H5D_mpio_actual_chunk_opt_mode_t chunk_opt);
+H5_DLL void H5CX_set_mpio_actual_io_mode(H5D_mpio_actual_io_mode_t actual_io_mode);
+H5_DLL void H5CX_set_mpio_local_no_coll_cause(uint32_t mpio_local_no_coll_cause);
+H5_DLL void H5CX_set_mpio_global_no_coll_cause(uint32_t mpio_global_no_coll_cause);
+#ifdef H5_HAVE_INSTRUMENTED_LIBRARY
+H5_DLL herr_t H5CX_test_set_mpio_coll_chunk_link_hard(int mpio_coll_chunk_link_hard);
+H5_DLL herr_t H5CX_test_set_mpio_coll_chunk_multi_hard(int mpio_coll_chunk_multi_hard);
+H5_DLL herr_t H5CX_test_set_mpio_coll_chunk_link_num_true(int mpio_coll_chunk_link_num_true);
+H5_DLL herr_t H5CX_test_set_mpio_coll_chunk_link_num_false(int mpio_coll_chunk_link_num_false);
+H5_DLL herr_t H5CX_test_set_mpio_coll_chunk_multi_ratio_coll(int mpio_coll_chunk_multi_ratio_coll);
+H5_DLL herr_t H5CX_test_set_mpio_coll_chunk_multi_ratio_ind(int mpio_coll_chunk_multi_ratio_ind);
+#endif /* H5_HAVE_INSTRUMENTED_LIBRARY */
+#endif /* H5_HAVE_PARALLEL */
+
+#endif /* _H5CXprivate_H */
+
diff --git a/src/H5Cdbg.c b/src/H5Cdbg.c
index 85f25b3..08c70d9 100644
--- a/src/H5Cdbg.c
+++ b/src/H5Cdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -718,6 +716,7 @@ H5C_stats(H5C_t * cache_ptr,
               (long)(cache_ptr->LRU_list_size),
               (unsigned long)(cache_ptr->LRU_list_len));
 
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
     HDfprintf(stdout,
               "%s  current clean LRU size / length    = %ld / %lu\n",
               cache_ptr->prefix,
@@ -729,6 +728,7 @@ H5C_stats(H5C_t * cache_ptr,
               cache_ptr->prefix,
               (long)(cache_ptr->dLRU_list_size),
               (unsigned long)(cache_ptr->dLRU_list_len));
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
 
     HDfprintf(stdout,
               "%s  Total hits / misses / hit_rate     = %ld / %ld / %f\n",
diff --git a/src/H5Cepoch.c b/src/H5Cepoch.c
index 655d795..8bcab9f 100644
--- a/src/H5Cepoch.c
+++ b/src/H5Cepoch.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -66,15 +64,15 @@ static void * H5C__epoch_marker_deserialize(const void * image_ptr,
     size_t len, void * udata, hbool_t * dirty_ptr);
 static herr_t H5C__epoch_marker_image_len(const void * thing,
     size_t *image_len_ptr);
-static herr_t H5C__epoch_marker_pre_serialize(H5F_t *f,
-    hid_t dxpl_id, void * thing, haddr_t addr, size_t len,
-    haddr_t * new_addr_ptr, size_t * new_len_ptr, unsigned * flags_ptr);
+static herr_t H5C__epoch_marker_pre_serialize(H5F_t *f, void *thing,
+    haddr_t addr, size_t len, haddr_t *new_addr_ptr, size_t *new_len_ptr,
+    unsigned *flags_ptr);
 static herr_t H5C__epoch_marker_serialize(const H5F_t *f,
     void * image_ptr, size_t len, void * thing);
 static herr_t H5C__epoch_marker_notify(H5C_notify_action_t action, void *thing);
 static herr_t H5C__epoch_marker_free_icr(void * thing);
 static herr_t H5C__epoch_marker_fsf_size(const void H5_ATTR_UNUSED * thing, 
-    size_t H5_ATTR_UNUSED * fsf_size_ptr);
+    hsize_t H5_ATTR_UNUSED * fsf_size_ptr);
 
 
 /*********************/
@@ -182,7 +180,7 @@ H5C__epoch_marker_image_len(const void H5_ATTR_UNUSED *thing,
 
 
 static herr_t
-H5C__epoch_marker_pre_serialize(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
+H5C__epoch_marker_pre_serialize(H5F_t H5_ATTR_UNUSED *f,
     void H5_ATTR_UNUSED *thing, haddr_t H5_ATTR_UNUSED addr, size_t H5_ATTR_UNUSED len,
     haddr_t H5_ATTR_UNUSED *new_addr_ptr, size_t H5_ATTR_UNUSED *new_len_ptr,
     unsigned H5_ATTR_UNUSED *flags_ptr)
@@ -231,7 +229,7 @@ H5C__epoch_marker_free_icr(void H5_ATTR_UNUSED * thing)
 
 
 static herr_t 
-H5C__epoch_marker_fsf_size(const void H5_ATTR_UNUSED * thing, size_t H5_ATTR_UNUSED *fsf_size_ptr)
+H5C__epoch_marker_fsf_size(const void H5_ATTR_UNUSED * thing, hsize_t H5_ATTR_UNUSED *fsf_size_ptr)
 {
     FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
 
diff --git a/src/H5Cimage.c b/src/H5Cimage.c
index d60ee05..51de5c4 100644
--- a/src/H5Cimage.c
+++ b/src/H5Cimage.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -116,14 +114,12 @@ static void H5C__prep_for_file_close__compute_fd_heights_real(
 static herr_t H5C__prep_for_file_close__setup_image_entries_array(H5C_t *cache_ptr);
 static herr_t H5C__prep_for_file_close__scan_entries(const H5F_t *f,
     H5C_t *cache_ptr);
-static herr_t H5C__reconstruct_cache_contents(H5F_t *f, hid_t dxpl_id, 
-    H5C_t *cache_ptr);
+static herr_t H5C__reconstruct_cache_contents(H5F_t *f, H5C_t *cache_ptr);
 static H5C_cache_entry_t *H5C__reconstruct_cache_entry(const H5F_t *f,
     H5C_t *cache_ptr, const uint8_t **buf);
-static herr_t H5C__write_cache_image_superblock_msg(H5F_t *f, hid_t dxpl_id, 
-    hbool_t create);
-static herr_t H5C__read_cache_image(H5F_t * f, hid_t dxpl_id, H5C_t *cache_ptr);
-static herr_t H5C__write_cache_image(H5F_t *f, hid_t dxpl_id, const H5C_t *cache_ptr);
+static herr_t H5C__write_cache_image_superblock_msg(H5F_t *f, hbool_t create);
+static herr_t H5C__read_cache_image(H5F_t * f, H5C_t *cache_ptr);
+static herr_t H5C__write_cache_image(H5F_t *f, const H5C_t *cache_ptr);
 static herr_t H5C__construct_cache_image_buffer(H5F_t *f, H5C_t *cache_ptr);
 static herr_t H5C__free_image_entries_array(H5C_t *cache_ptr);
 
@@ -393,7 +389,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__generate_cache_image(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr)
+H5C__generate_cache_image(H5F_t *f, H5C_t *cache_ptr)
 {
     herr_t 	ret_value = SUCCEED;    /* Return value */
 
@@ -416,7 +412,7 @@ H5C__generate_cache_image(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr)
 
     /* Write cache image block if so configured */
     if(cache_ptr->image_ctl.flags & H5C_CI__GEN_MDC_IMAGE_BLK) {
-        if(H5C__write_cache_image(f, dxpl_id, cache_ptr) < 0)
+        if(H5C__write_cache_image(f, cache_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't write metadata cache image block to file")
 
         H5C__UPDATE_STATS_FOR_CACHE_IMAGE_CREATE(cache_ptr);
@@ -468,7 +464,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__deserialize_prefetched_entry(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr,
+H5C__deserialize_prefetched_entry(H5F_t *f, H5C_t *cache_ptr,
     H5C_cache_entry_t **entry_ptr_ptr, const H5C_class_t *type,
     haddr_t addr, void *udata)
 {
@@ -651,8 +647,10 @@ H5C__deserialize_prefetched_entry(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr,
     /* Initialize fields supporting replacement policies: */
     ds_entry_ptr->next                      	= NULL;
     ds_entry_ptr->prev                      	= NULL;
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
     ds_entry_ptr->aux_next                  	= NULL;
     ds_entry_ptr->aux_prev                  	= NULL;
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
 #ifdef H5_HAVE_PARALLEL
     pf_entry_ptr->coll_next                 	= NULL;
     pf_entry_ptr->coll_prev                 	= NULL;
@@ -678,7 +676,7 @@ H5C__deserialize_prefetched_entry(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr,
     H5C__RESET_CACHE_ENTRY_STATS(ds_entry_ptr);
 
     /* Apply to to the newly deserialized entry */
-    if(H5C__tag_entry(cache_ptr, ds_entry_ptr, dxpl_id) < 0)
+    if(H5C__tag_entry(cache_ptr, ds_entry_ptr) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, FAIL, "Cannot tag metadata entry")
 
     /* We have successfully deserialized the prefetched entry.
@@ -707,7 +705,7 @@ H5C__deserialize_prefetched_entry(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr,
         flush_flags |= H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG;
     } /* end if */
 
-    if(H5C__flush_single_entry(f, dxpl_id, pf_entry_ptr, flush_flags) < 0)
+    if(H5C__flush_single_entry(f, pf_entry_ptr, flush_flags) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTEXPUNGE, FAIL, "can't expunge prefetched entry")
 
 #ifndef NDEGUG /* verify deletion */
@@ -886,7 +884,7 @@ H5C__free_image_entries_array(H5C_t * cache_ptr)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_force_cache_image_load(H5F_t *f, hid_t dxpl_id)
+H5C_force_cache_image_load(H5F_t *f)
 {
     H5C_t *cache_ptr;
     herr_t ret_value = SUCCEED;      /* Return value */
@@ -904,7 +902,7 @@ H5C_force_cache_image_load(H5F_t *f, hid_t dxpl_id)
     /* Load the cache image, if requested */
     if(cache_ptr->load_image) {
         cache_ptr->load_image = FALSE;
-        if(H5C__load_cache_image(f, dxpl_id) < 0)
+        if(H5C__load_cache_image(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, FAIL, "can't load cache image")
     } /* end if */
 
@@ -1034,8 +1032,8 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-herr_t
-H5C__read_cache_image(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr)
+static herr_t
+H5C__read_cache_image(H5F_t *f, H5C_t *cache_ptr)
 {
     herr_t              ret_value = SUCCEED;    /* Return value */
 
@@ -1060,12 +1058,9 @@ H5C__read_cache_image(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr)
 #endif /* H5_HAVE_PARALLEL */
 
 	/* Read the buffer (if serial access, or rank 0 of parallel access) */
-        if ( H5F_block_read(f, H5FD_MEM_SUPER, cache_ptr->image_addr, 
-                            cache_ptr->image_len, dxpl_id, 
-                            cache_ptr->image_buffer) < 0)
-
-            HGOTO_ERROR(H5E_CACHE, H5E_READERROR, FAIL, \
-                        "Can't read metadata cache image block")
+        if(H5F_block_read(f, H5FD_MEM_SUPER, cache_ptr->image_addr, 
+                cache_ptr->image_len, cache_ptr->image_buffer) < 0)
+            HGOTO_ERROR(H5E_CACHE, H5E_READERROR, FAIL, "Can't read metadata cache image block")
 
         H5C__UPDATE_STATS_FOR_CACHE_IMAGE_READ(cache_ptr)
 
@@ -1097,9 +1092,7 @@ H5C__read_cache_image(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr)
 #endif /* H5_HAVE_PARALLEL */
 
 done:
-
     FUNC_LEAVE_NOAPI(ret_value)
-
 } /* H5C__read_cache_image() */
 
 
@@ -1121,7 +1114,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__load_cache_image(H5F_t *f, hid_t dxpl_id)
+H5C__load_cache_image(H5F_t *f)
 {
     H5C_t *             cache_ptr;
     herr_t		ret_value = SUCCEED;    /* Return value */
@@ -1154,11 +1147,11 @@ H5C__load_cache_image(H5F_t *f, hid_t dxpl_id)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for cache image buffer")
 
 	/* Load the image from file */
-	if(H5C__read_cache_image(f, dxpl_id, cache_ptr) < 0)
+	if(H5C__read_cache_image(f, cache_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_READERROR, FAIL, "Can't read metadata cache image block")
 
 	/* Reconstruct cache contents, from image */
-	if(H5C__reconstruct_cache_contents(f, dxpl_id, cache_ptr) < 0)
+	if(H5C__reconstruct_cache_contents(f, cache_ptr) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTDECODE, FAIL, "Can't reconstruct cache contents from image block")
 
 	/* Free the image buffer */
@@ -1174,7 +1167,7 @@ H5C__load_cache_image(H5F_t *f, hid_t dxpl_id)
 
     /* If directed, free the on disk metadata cache image */
     if(cache_ptr->delete_image) {
-        if(H5F_super_ext_remove_msg(f, dxpl_id, H5O_MDCI_MSG_ID) < 0)
+        if(H5F__super_ext_remove_msg(f, H5O_MDCI_MSG_ID) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove metadata cache image message from superblock extension")
 
         /* Reset image block values */
@@ -1343,7 +1336,7 @@ H5C__image_entry_cmp(const void *_entry1, const void *_entry2)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated)
+H5C__prep_image_for_file_close(H5F_t *f, hbool_t *image_generated)
 {
     H5C_t *     cache_ptr = NULL;
     haddr_t     eoa_frag_addr = HADDR_UNDEF;
@@ -1367,7 +1360,7 @@ H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated
      */
     if(cache_ptr->load_image) {
         cache_ptr->load_image = FALSE;
-        if(H5C__load_cache_image(f, dxpl_id) < 0)
+        if(H5C__load_cache_image(f) < 0)
 	    HGOTO_ERROR(H5E_CACHE, H5E_CANTLOAD, FAIL, "can't load cache image")
     } /* end if */
 
@@ -1382,9 +1375,12 @@ H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated
      * Note that under some error conditions, the superblock will be 
      * undefined in this case as well -- if so, assume that the 
      * superblock does not support superblock extension messages.
+     * Also verify that the file's high_bound is at least release
+     * 1.10.x, otherwise cancel the request for a cache image
      */
     if((NULL == f->shared->sblock) ||
-         (f->shared->sblock->super_vers < HDF5_SUPERBLOCK_VERSION_2)) {
+         (f->shared->sblock->super_vers < HDF5_SUPERBLOCK_VERSION_2) ||
+         (f->shared->high_bound < H5F_LIBVER_V110)) {
         H5C_cache_image_ctl_t default_image_ctl = H5C__DEFAULT_CACHE_IMAGE_CTL;
 
         cache_ptr->image_ctl = default_image_ctl;
@@ -1408,11 +1404,11 @@ H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated
          * cache_ptr->image_ctl.flags.
          */
         if(cache_ptr->image_ctl.flags & H5C_CI__GEN_MDCI_SBE_MESG)
-            if(H5C__write_cache_image_superblock_msg(f, dxpl_id, TRUE) < 0)
+            if(H5C__write_cache_image_superblock_msg(f, TRUE) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "creation of cache image SB mesg failed.")
 
         /* Serialize the cache */
-        if(H5C__serialize_cache(f, dxpl_id) < 0)
+        if(H5C__serialize_cache(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "serialization of the cache failed")
 
         /* Scan the cache and record data needed to construct the 
@@ -1470,7 +1466,7 @@ H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated
              * Note that we allocate the cache image directly from the file 
              * driver so as to avoid unsettling the free space managers.
              */
-            if(HADDR_UNDEF == (cache_ptr->image_addr = H5FD_alloc(f->shared->lf, dxpl_id, H5FD_MEM_SUPER, f,
+            if(HADDR_UNDEF == (cache_ptr->image_addr = H5FD_alloc(f->shared->lf, H5FD_MEM_SUPER, f,
                         (hsize_t)p0_image_len, &eoa_frag_addr, &eoa_frag_size)))
                 HGOTO_ERROR(H5E_CACHE, H5E_NOSPACE, FAIL, "can't allocate file space for metadata cache image")
         } /* end if */
@@ -1480,7 +1476,7 @@ H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated
              * this space directly from the file driver so as to avoid 
              * unsettling the free space managers.
              */
-            if(HADDR_UNDEF == (cache_ptr->image_addr = H5FD_alloc(f->shared->lf, dxpl_id, H5FD_MEM_SUPER, f,
+            if(HADDR_UNDEF == (cache_ptr->image_addr = H5FD_alloc(f->shared->lf, H5FD_MEM_SUPER, f,
                         (hsize_t)(cache_ptr->image_data_len), &eoa_frag_addr, &eoa_frag_size)))
                 HGOTO_ERROR(H5E_CACHE, H5E_NOSPACE, FAIL, "can't allocate file space for metadata cache image")
 
@@ -1523,7 +1519,7 @@ H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated
          * cache_ptr->image_ctl.flags.
          */
         if(cache_ptr->image_ctl.flags & H5C_CI__GEN_MDC_IMAGE_BLK)
-            if(H5C__write_cache_image_superblock_msg(f, dxpl_id, FALSE) < 0)
+            if(H5C__write_cache_image_superblock_msg(f, FALSE) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_SYSTEM, FAIL, "update of cache image SB mesg failed")
 
         /* At this point:
@@ -1577,7 +1573,7 @@ H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id, hbool_t *image_generated
              * cache_ptr->image_ctl.flags.
              */
             if(cache_ptr->image_ctl.flags & H5C_CI__GEN_MDC_IMAGE_BLK)
-                if(H5F_super_ext_remove_msg(f, dxpl_id, H5O_MDCI_MSG_ID) < 0)
+                if(H5F__super_ext_remove_msg(f, H5O_MDCI_MSG_ID) < 0)
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTREMOVE, FAIL, "can't remove MDC image msg from superblock ext")
 
             cache_ptr->image_ctl.generate_image = FALSE;
@@ -3093,7 +3089,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__reconstruct_cache_contents(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr)
+H5C__reconstruct_cache_contents(H5F_t *f, H5C_t *cache_ptr)
 {
     H5C_cache_entry_t *	pf_entry_ptr;   /* Pointer to prefetched entry */
     H5C_cache_entry_t *	parent_ptr;     /* Pointer to parent of prefetched entry */
@@ -3275,7 +3271,7 @@ H5C__reconstruct_cache_contents(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr)
         else
             write_permitted = cache_ptr->write_permitted;
 
-	if(H5C__make_space_in_cache(f, dxpl_id, 0, write_permitted) < 0)
+	if(H5C__make_space_in_cache(f, 0, write_permitted) < 0)
 	    HGOTO_ERROR(H5E_CACHE, H5E_CANTPROTECT, FAIL, "H5C__make_space_in_cache failed")
     } /* end if */
 
@@ -3476,7 +3472,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__write_cache_image_superblock_msg(H5F_t *f, hid_t dxpl_id, hbool_t create)
+H5C__write_cache_image_superblock_msg(H5F_t *f, hbool_t create)
 {
     H5C_t *		cache_ptr;
     H5O_mdci_t 	        mdci_msg;	/* metadata cache image message */
@@ -3514,7 +3510,7 @@ H5C__write_cache_image_superblock_msg(H5F_t *f, hid_t dxpl_id, hbool_t create)
         mdci_msg.size = cache_ptr->image_len;
 
     /* Write metadata cache image message to superblock extension */
-    if(H5F_super_ext_write_msg(f, dxpl_id, H5O_MDCI_MSG_ID, &mdci_msg, create, mesg_flags) < 0)
+    if(H5F__super_ext_write_msg(f, H5O_MDCI_MSG_ID, &mdci_msg, create, mesg_flags) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_WRITEERROR, FAIL, "can't write metadata cache image message to superblock extension")
 
 done:
@@ -3536,7 +3532,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__write_cache_image(H5F_t *f, hid_t dxpl_id, const H5C_t *cache_ptr)
+H5C__write_cache_image(H5F_t *f, const H5C_t *cache_ptr)
 {
     herr_t              ret_value = SUCCEED;    /* Return value */
 
@@ -3558,7 +3554,7 @@ H5C__write_cache_image(H5F_t *f, hid_t dxpl_id, const H5C_t *cache_ptr)
 #endif /* H5_HAVE_PARALLEL */
 
 	/* Write the buffer (if serial access, or rank 0 for parallel access) */
-	if(H5F_block_write(f, H5FD_MEM_SUPER, cache_ptr->image_addr, cache_ptr->image_len, dxpl_id, cache_ptr->image_buffer) < 0)
+	if(H5F_block_write(f, H5FD_MEM_SUPER, cache_ptr->image_addr, cache_ptr->image_len, cache_ptr->image_buffer) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "can't write metadata cache image block to file")
 #ifdef H5_HAVE_PARALLEL
     } /* end if */
diff --git a/src/H5Clog.c b/src/H5Clog.c
index e3e4388..3353619 100644
--- a/src/H5Clog.c
+++ b/src/H5Clog.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Cmodule.h b/src/H5Cmodule.h
index 2c39eab..534404d 100644
--- a/src/H5Cmodule.h
+++ b/src/H5Cmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Cmpio.c b/src/H5Cmpio.c
index 0d1a3ff..e342d69 100644
--- a/src/H5Cmpio.c
+++ b/src/H5Cmpio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -39,14 +37,11 @@
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACprivate.h"        /* Metadata cache                       */
 #include "H5Cpkg.h"		/* Cache				*/
-#include "H5Dprivate.h"		/* Datasets     		  	*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"		/* Files				*/
 #include "H5FDprivate.h"	/* File drivers				*/
-#include "H5FLprivate.h"	/* Free Lists                           */
-#include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Pprivate.h"         /* Property lists                       */
 
 
 #ifdef H5_HAVE_PARALLEL
@@ -64,12 +59,11 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5C__collective_write(H5F_t *f, hid_t dxpl_id);
-static herr_t H5C__flush_candidate_entries(H5F_t *f, hid_t dxpl_id, 
-    unsigned entries_to_flush[H5C_RING_NTYPES], 
+static herr_t H5C__collective_write(H5F_t *f);
+static herr_t H5C__flush_candidate_entries(H5F_t *f, unsigned entries_to_flush[H5C_RING_NTYPES], 
     unsigned entries_to_clear[H5C_RING_NTYPES]);
-static herr_t H5C__flush_candidates_in_ring(H5F_t *f, hid_t dxpl_id, 
-    H5C_ring_t ring, unsigned  entries_to_flush, unsigned entries_to_clear);
+static herr_t H5C__flush_candidates_in_ring(H5F_t *f, H5C_ring_t ring,
+    unsigned  entries_to_flush, unsigned entries_to_clear);
 
 
 /*********************/
@@ -173,7 +167,6 @@ static herr_t H5C__flush_candidates_in_ring(H5F_t *f, hid_t dxpl_id,
  */
 herr_t
 H5C_apply_candidate_list(H5F_t * f,
-                         hid_t dxpl_id,
                          H5C_t * cache_ptr,
                          unsigned num_candidates,
                          haddr_t * candidates_list_ptr,
@@ -389,7 +382,7 @@ H5C_apply_candidate_list(H5F_t * f,
      * If we don't do this, my experiments indicate that we will have a
      * noticably poorer hit ratio as a result.
      */
-     if(H5C__flush_candidate_entries(f, dxpl_id, entries_to_flush, entries_to_clear) < 0)
+     if(H5C__flush_candidate_entries(f, entries_to_flush, entries_to_clear) < 0)
          HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "flush candidates failed")
 
     /* If we've deferred writing to do it collectively, take care of that now */
@@ -398,7 +391,7 @@ H5C_apply_candidate_list(H5F_t * f,
         HDassert(cache_ptr->coll_write_list);
 
         /* Write collective list */
-        if(H5C__collective_write(f, dxpl_id) < 0)
+        if(H5C__collective_write(f) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_WRITEERROR, FAIL, "can't write metadata collectively")
     } /* end if */
 
@@ -646,7 +639,6 @@ done:
  */
 herr_t
 H5C_mark_entries_as_clean(H5F_t *  f,
-                          hid_t     dxpl_id,
                           unsigned  ce_array_len,
                           haddr_t * ce_array_ptr)
 {
@@ -790,7 +782,7 @@ H5C_mark_entries_as_clean(H5F_t *  f,
             entry_ptr = entry_ptr->prev;
             entries_cleared++;
 
-            if(H5C__flush_single_entry(f, dxpl_id, clear_ptr,
+            if(H5C__flush_single_entry(f, clear_ptr,
                     (H5C__FLUSH_CLEAR_ONLY_FLAG | H5C__GENERATE_IMAGE_FLAG | H5C__UPDATE_PAGE_BUFFER_FLAG)) < 0)
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "can't clear entry")
         } /* end if */
@@ -820,7 +812,7 @@ H5C_mark_entries_as_clean(H5F_t *  f,
                 pinned_entries_cleared++;
                 progress = TRUE;
 
-                if(H5C__flush_single_entry(f, dxpl_id, clear_ptr, 
+                if(H5C__flush_single_entry(f, clear_ptr, 
                         (H5C__FLUSH_CLEAR_ONLY_FLAG | H5C__GENERATE_IMAGE_FLAG | H5C__UPDATE_PAGE_BUFFER_FLAG)) < 0)
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "can't clear entry")
             } /* end if */
@@ -924,10 +916,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__collective_write(H5F_t *f, hid_t dxpl_id)
+H5C__collective_write(H5F_t *f)
 {
     H5AC_t              *cache_ptr;
-    H5P_genplist_t      *plist = NULL;
     H5FD_mpio_xfer_t    orig_xfer_mode = H5FD_MPIO_COLLECTIVE;
     int                 count;
     int                 *length_array = NULL;
@@ -949,12 +940,8 @@ H5C__collective_write(H5F_t *f, hid_t dxpl_id)
     HDassert(cache_ptr->coll_write_list != NULL);
 
     /* Get original transfer mode */
-    if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, \
-                    "not a data transfer property list")
-
-    if(H5P_get(plist, H5D_XFER_IO_XFER_MODE_NAME, &orig_xfer_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set MPI-I/O property")
+    if(H5CX_get_io_xfer_mode(&orig_xfer_mode) < 0)
+        HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
 
     /* Get number of entries in collective write list */
     count = (int)H5SL_count(cache_ptr->coll_write_list);
@@ -966,35 +953,23 @@ H5C__collective_write(H5F_t *f, hid_t dxpl_id)
         void                *base_buf;
         int                 i;
 
-        if(H5P_set(plist, H5D_XFER_IO_XFER_MODE_NAME, &xfer_mode) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, \
-                        "can't set MPI-I/O property")
+        /* Set new transfer mode */
+        if(H5CX_set_io_xfer_mode(xfer_mode) < 0)
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set MPI-I/O transfer mode")
 
         /* Allocate arrays */
-        if ( NULL == (length_array = 
-                      (int *)H5MM_malloc((size_t)count * sizeof(int))) )
-
-            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, \
-            "memory allocation failed for collective write table length array")
-
-        if ( NULL == (buf_array = 
-                 (MPI_Aint *)H5MM_malloc((size_t)count * sizeof(MPI_Aint))) )
-
-            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, \
-              "memory allocation failed for collective buf table length array")
-
-        if(NULL == (offset_array = 
-                    (MPI_Aint *)H5MM_malloc((size_t)count * sizeof(MPI_Aint))) )
-
-            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, \
-            "memory allocation failed for collective offset table length array")
+        if(NULL == (length_array = (int *)H5MM_malloc((size_t)count * sizeof(int))) )
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for collective write table length array")
+        if(NULL == (buf_array = (MPI_Aint *)H5MM_malloc((size_t)count * sizeof(MPI_Aint))) )
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for collective buf table length array")
+        if(NULL == (offset_array = (MPI_Aint *)H5MM_malloc((size_t)count * sizeof(MPI_Aint))) )
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for collective offset table length array")
 
         /* Fill arrays */
         node = H5SL_first(cache_ptr->coll_write_list);
         HDassert(node);
         if(NULL == (entry_ptr = (H5C_cache_entry_t *)H5SL_item(node)))
-            HGOTO_ERROR(H5E_CACHE, H5E_NOTFOUND, FAIL, \
-                        "can't retrieve skip list item")
+            HGOTO_ERROR(H5E_CACHE, H5E_NOTFOUND, FAIL, "can't retrieve skip list item")
 
         /* Set up initial array position & buffer base address */
         length_array[0] = (int)entry_ptr->size;
@@ -1007,8 +982,7 @@ H5C__collective_write(H5F_t *f, hid_t dxpl_id)
         while(node) {
 
             if(NULL == (entry_ptr = (H5C_cache_entry_t *)H5SL_item(node)))
-                HGOTO_ERROR(H5E_CACHE, H5E_NOTFOUND, FAIL, \
-                            "can't retrieve skip list item")
+                HGOTO_ERROR(H5E_CACHE, H5E_NOTFOUND, FAIL, "can't retrieve skip list item")
 
             /* Set up array position */
             length_array[i] = (int)entry_ptr->size;
@@ -1021,10 +995,7 @@ H5C__collective_write(H5F_t *f, hid_t dxpl_id)
         } /* end while */
 
         /* Create memory MPI type */
-        if(MPI_SUCCESS != (mpi_code = 
-                           MPI_Type_create_hindexed(count, length_array, 
-                                                    buf_array, MPI_BYTE, 
-                                                    &btype)))
+        if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed(count, length_array, buf_array, MPI_BYTE, &btype)))
             HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed failed", mpi_code)
 
         btype_created = TRUE;
@@ -1033,10 +1004,7 @@ H5C__collective_write(H5F_t *f, hid_t dxpl_id)
             HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
 
         /* Create file MPI type */
-        if(MPI_SUCCESS != (mpi_code = 
-                           MPI_Type_create_hindexed(count, length_array, 
-                                                    offset_array, MPI_BYTE, 
-                                                    &ftype)))
+        if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed(count, length_array, offset_array, MPI_BYTE, &ftype)))
             HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed failed", mpi_code)
 
         ftype_created = TRUE;
@@ -1045,15 +1013,12 @@ H5C__collective_write(H5F_t *f, hid_t dxpl_id)
             HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
 
         /* Pass buf type, file type to the file driver */
-        if(H5FD_mpi_setup_collective(dxpl_id, &btype, &ftype) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, \
-                        "can't set MPI-I/O properties")
+        if(H5CX_set_mpi_coll_datatypes(btype, ftype) < 0)
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set MPI-I/O properties")
 
         /* Write data */
-        if(H5F_block_write(f, H5FD_MEM_DEFAULT, (haddr_t)0, 
-                           (size_t)1, dxpl_id, base_buf) < 0)
-            HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, \
-                        "unable to write entries collectively")
+        if(H5F_block_write(f, H5FD_MEM_DEFAULT, (haddr_t)0, (size_t)1, base_buf) < 0)
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to write entries collectively")
 
     } /* end if */
     else {
@@ -1063,43 +1028,35 @@ H5C__collective_write(H5F_t *f, hid_t dxpl_id)
         MPI_Info *info_p;
         MPI_Info info;
 
+/* This should be rewritten to call H5F_block_write, with the correct
+ *      buffer and file datatypes (null ones).  -QAK, 2018/02/21
+ */
         if(H5F_get_mpi_handle(f, (MPI_File **)&mpi_fh_p) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, \
-                        "can't get mpi file handle")
+            HGOTO_ERROR(H5E_CACHE, H5E_CANTGET, FAIL, "can't get mpi file handle")
 
         mpi_fh = *(MPI_File*)mpi_fh_p;
 
-        if (H5F_get_mpi_info(f, &info_p) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, \
-                        "can't get mpi file info")
+        if(H5F_get_mpi_info(f, &info_p) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get mpi file info")
 
         info = *info_p;
 
         /* just to match up with the 1st MPI_File_set_view from 
          * H5FD_mpio_write() 
          */
-        if(MPI_SUCCESS != (mpi_code = 
-                           MPI_File_set_view(mpi_fh, (MPI_Offset)0, MPI_BYTE, 
-                                             MPI_BYTE, "native", 
-                                             info)))
+        if(MPI_SUCCESS != (mpi_code = MPI_File_set_view(mpi_fh, (MPI_Offset)0, MPI_BYTE, MPI_BYTE, "native", info)))
             HMPI_GOTO_ERROR(FAIL, "MPI_File_set_view failed", mpi_code)
 
         /* just to match up with MPI_File_write_at_all from H5FD_mpio_write() */
         HDmemset(&mpi_stat, 0, sizeof(MPI_Status));
-        if(MPI_SUCCESS != (mpi_code = 
-                           MPI_File_write_at_all(mpi_fh, (MPI_Offset)0, 
-                                                 NULL, 0, MPI_BYTE, &mpi_stat)))
+        if(MPI_SUCCESS != (mpi_code = MPI_File_write_at_all(mpi_fh, (MPI_Offset)0, NULL, 0, MPI_BYTE, &mpi_stat)))
             HMPI_GOTO_ERROR(FAIL, "MPI_File_write_at_all failed", mpi_code)
 
         /* just to match up with the 2nd MPI_File_set_view (reset) in 
          * H5FD_mpio_write() 
          */
-        if(MPI_SUCCESS != (mpi_code = 
-                           MPI_File_set_view(mpi_fh, (MPI_Offset)0, MPI_BYTE, 
-                                             MPI_BYTE, "native", 
-                                             info)))
+        if(MPI_SUCCESS != (mpi_code = MPI_File_set_view(mpi_fh, (MPI_Offset)0, MPI_BYTE, MPI_BYTE, "native", info)))
             HMPI_GOTO_ERROR(FAIL, "MPI_File_set_view failed", mpi_code)
-
     } /* end else */
 
 done:
@@ -1114,13 +1071,10 @@ done:
     if(ftype_created && MPI_SUCCESS != (mpi_code = MPI_Type_free(&ftype)))
         HMPI_DONE_ERROR(FAIL, "MPI_Type_free failed", mpi_code)
 
-    /* Reset dxpl */
-    if(orig_xfer_mode != H5FD_MPIO_COLLECTIVE) {
-        HDassert(plist);
-        if(H5P_set(plist, H5D_XFER_IO_XFER_MODE_NAME, &orig_xfer_mode) < 0)
-            HDONE_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, \
-                        "can't set MPI-I/O property")
-    } /* end if */
+    /* Reset transfer mode in API context, if changed */
+    if(orig_xfer_mode != H5FD_MPIO_COLLECTIVE)
+        if(H5CX_set_io_xfer_mode(orig_xfer_mode) < 0)
+            HDONE_ERROR(H5E_CACHE, H5E_CANTSET, FAIL, "can't set MPI-I/O transfer mode")
 
     FUNC_LEAVE_NOAPI(ret_value);
 } /* end H5C__collective_write() */
@@ -1165,8 +1119,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__flush_candidate_entries(H5F_t *f, hid_t dxpl_id,
-    unsigned entries_to_flush[H5C_RING_NTYPES],
+H5C__flush_candidate_entries(H5F_t *f, unsigned entries_to_flush[H5C_RING_NTYPES],
     unsigned entries_to_clear[H5C_RING_NTYPES])
 {
 #if H5C_DO_SANITY_CHECKS
@@ -1236,7 +1189,7 @@ H5C__flush_candidate_entries(H5F_t *f, hid_t dxpl_id,
      */
     ring = H5C_RING_USER;
     while(ring < H5C_RING_NTYPES) {
-        if(H5C__flush_candidates_in_ring(f, dxpl_id, ring, entries_to_flush[ring], entries_to_clear[ring]) < 0)
+        if(H5C__flush_candidates_in_ring(f, ring, entries_to_flush[ring], entries_to_clear[ring]) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "flush candidates in ring failed")
 
         ring++;
@@ -1286,7 +1239,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5C__flush_candidates_in_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,
+H5C__flush_candidates_in_ring(H5F_t *f, H5C_ring_t ring,
     unsigned  entries_to_flush, unsigned entries_to_clear)
 {
     H5C_t   * cache_ptr;
@@ -1415,7 +1368,7 @@ H5C__flush_candidates_in_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,
                 cache_ptr->entries_removed_counter = 0;
                 cache_ptr->last_entry_removed_ptr  = NULL;
 
-                if(H5C__flush_single_entry(f, dxpl_id, op_ptr, op_flags) < 0)
+                if(H5C__flush_single_entry(f, op_ptr, op_flags) < 0)
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "can't flush entry")
 
                 if(cache_ptr->entries_removed_counter != 0
@@ -1553,7 +1506,7 @@ H5C__flush_candidates_in_ring(H5F_t *f, hid_t dxpl_id, H5C_ring_t ring,
                      *
                      *                                    JRM -- 2/9/17
                      */
-                    if(H5C__flush_single_entry(f, dxpl_id, op_ptr, op_flags) < 0)
+                    if(H5C__flush_single_entry(f, op_ptr, op_flags) < 0)
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "can't flush entry")
 
                     if(cache_ptr->entries_removed_counter != 0
diff --git a/src/H5Cpkg.h b/src/H5Cpkg.h
index 90a84c4..c5dc8f3 100644
--- a/src/H5Cpkg.h
+++ b/src/H5Cpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -4748,6 +4746,7 @@ struct H5C_t {
     H5C_cache_entry_t *		LRU_head_ptr;
     H5C_cache_entry_t *		LRU_tail_ptr;
 
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
     /* Fields for clean LRU list of entries */
     uint32_t                    cLRU_list_len;
     size_t                      cLRU_list_size;
@@ -4759,6 +4758,7 @@ struct H5C_t {
     size_t                      dLRU_list_size;
     H5C_cache_entry_t *		dLRU_head_ptr;
     H5C_cache_entry_t *	        dLRU_tail_ptr;
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
 
 #ifdef H5_HAVE_PARALLEL
     /* Fields for collective metadata reads */
@@ -4922,31 +4922,29 @@ typedef int (*H5C_tag_iter_cb_t)(H5C_cache_entry_t *entry, void *ctx);
 /******************************/
 /* Package Private Prototypes */
 /******************************/
-H5_DLL herr_t H5C__prep_image_for_file_close(H5F_t *f, hid_t dxpl_id,
-    hbool_t *image_generated);
-H5_DLL herr_t H5C__deserialize_prefetched_entry(H5F_t *f, hid_t dxpl_id,
-    H5C_t * cache_ptr, H5C_cache_entry_t** entry_ptr_ptr, 
-    const H5C_class_t * type, haddr_t addr, void * udata);
+H5_DLL herr_t H5C__prep_image_for_file_close(H5F_t *f, hbool_t *image_generated);
+H5_DLL herr_t H5C__deserialize_prefetched_entry(H5F_t *f, H5C_t * cache_ptr,
+    H5C_cache_entry_t** entry_ptr_ptr, const H5C_class_t * type, haddr_t addr,
+    void * udata);
 
 /* General routines */
-H5_DLL herr_t H5C__flush_single_entry(H5F_t *f, hid_t dxpl_id,
-    H5C_cache_entry_t *entry_ptr, unsigned flags);
-H5_DLL herr_t H5C__generate_cache_image(H5F_t *f, hid_t dxpl_id, H5C_t *cache_ptr);
-H5_DLL herr_t H5C__load_cache_image(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5C__flush_single_entry(H5F_t *f, H5C_cache_entry_t *entry_ptr,
+    unsigned flags);
+H5_DLL herr_t H5C__generate_cache_image(H5F_t *f, H5C_t *cache_ptr);
+H5_DLL herr_t H5C__load_cache_image(H5F_t *f);
 H5_DLL herr_t H5C__mark_flush_dep_serialized(H5C_cache_entry_t * entry_ptr);
 H5_DLL herr_t H5C__mark_flush_dep_unserialized(H5C_cache_entry_t * entry_ptr);
-H5_DLL herr_t H5C__make_space_in_cache(H5F_t * f, hid_t dxpl_id,
-    size_t  space_needed, hbool_t write_permitted);
-H5_DLL herr_t H5C__flush_marked_entries(H5F_t * f, hid_t dxpl_id);
+H5_DLL herr_t H5C__make_space_in_cache(H5F_t * f, size_t  space_needed,
+    hbool_t write_permitted);
+H5_DLL herr_t H5C__flush_marked_entries(H5F_t * f);
 H5_DLL herr_t H5C__generate_image(H5F_t *f, H5C_t *cache_ptr,
-    H5C_cache_entry_t *entry_ptr, hid_t dxpl_id);
-H5_DLL herr_t H5C__serialize_cache(H5F_t *f, hid_t dxpl_id);
+    H5C_cache_entry_t *entry_ptr);
+H5_DLL herr_t H5C__serialize_cache(H5F_t *f);
 H5_DLL herr_t H5C__iter_tagged_entries(H5C_t *cache, haddr_t tag, hbool_t match_global,
     H5C_tag_iter_cb_t cb, void *cb_ctx);
 
 /* Routines for operating on entry tags */
-H5_DLL herr_t H5C__tag_entry(H5C_t * cache_ptr, H5C_cache_entry_t * entry_ptr,
-    hid_t dxpl_id);
+H5_DLL herr_t H5C__tag_entry(H5C_t * cache_ptr, H5C_cache_entry_t * entry_ptr);
 H5_DLL herr_t H5C__untag_entry(H5C_t *cache, H5C_cache_entry_t *entry);
 
 /* Testing functions */
diff --git a/src/H5Cprefetched.c b/src/H5Cprefetched.c
index 9b11006..0befdf9 100644
--- a/src/H5Cprefetched.c
+++ b/src/H5Cprefetched.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -63,16 +61,16 @@ static void * H5C__prefetched_entry_deserialize(const void *image_ptr,
     size_t len, void *udata, hbool_t *dirty_ptr);
 static herr_t H5C__prefetched_entry_image_len(const void *thing,
     size_t *image_len_ptr);
-static herr_t H5C__prefetched_entry_pre_serialize(H5F_t *f,
-    hid_t dxpl_id, void *thing, haddr_t addr, size_t len,
-    haddr_t *new_addr_ptr, size_t *new_len_ptr, unsigned *flags_ptr);
+static herr_t H5C__prefetched_entry_pre_serialize(H5F_t *f, void *thing,
+    haddr_t addr, size_t len, haddr_t *new_addr_ptr, size_t *new_len_ptr,
+    unsigned *flags_ptr);
 static herr_t H5C__prefetched_entry_serialize(const H5F_t *f, void *image_ptr,
     size_t len, void *thing);
 static herr_t H5C__prefetched_entry_notify(H5C_notify_action_t action, 
     void *thing);
 static herr_t H5C__prefetched_entry_free_icr(void *thing);
 static herr_t H5C__prefetched_entry_fsf_size(const void *thing,
-    size_t *fsf_size_ptr);
+    hsize_t *fsf_size_ptr);
 
 
 /*********************/
@@ -184,11 +182,9 @@ H5C__prefetched_entry_image_len(const void H5_ATTR_UNUSED *thing,
 
 
 static herr_t
-H5C__prefetched_entry_pre_serialize(H5F_t H5_ATTR_UNUSED *f, 
-    hid_t H5_ATTR_UNUSED dxpl_id, void H5_ATTR_UNUSED *thing, 
+H5C__prefetched_entry_pre_serialize(H5F_t H5_ATTR_UNUSED *f, void H5_ATTR_UNUSED *thing, 
     haddr_t H5_ATTR_UNUSED addr, size_t H5_ATTR_UNUSED len,
-    haddr_t H5_ATTR_UNUSED *new_addr_ptr, 
-    size_t H5_ATTR_UNUSED *new_len_ptr, 
+    haddr_t H5_ATTR_UNUSED *new_addr_ptr, size_t H5_ATTR_UNUSED *new_len_ptr, 
     unsigned H5_ATTR_UNUSED *flags_ptr)
 {
     FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
@@ -341,7 +337,7 @@ done:
 
 static herr_t 
 H5C__prefetched_entry_fsf_size(const void H5_ATTR_UNUSED *thing, 
-    size_t H5_ATTR_UNUSED *fsf_size_ptr)
+    hsize_t H5_ATTR_UNUSED *fsf_size_ptr)
 {
     FUNC_ENTER_STATIC_NOERR /* Yes, even though this pushes an error on the stack */
 
diff --git a/src/H5Cprivate.h b/src/H5Cprivate.h
index 5c5a666..522b3cf 100644
--- a/src/H5Cprivate.h
+++ b/src/H5Cprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -563,7 +561,6 @@ typedef struct H5C_t H5C_t;
  *	The typedef for the pre-serialize callback is as follows:
  *
  *	typedef herr_t (*H5C_pre_serialize_func_t)(H5F_t *f,
- *                                             hid_t dxpl_id,
  *                                             void * thing,
  *                                             haddr_t addr,
  *                                             size_t len,
@@ -577,11 +574,6 @@ typedef struct H5C_t H5C_t;
  *		must be modified in the process of serializing the
  *		target entry.
  *
- *	dxpl_id: dxpl_id passed with the file pointer to the cache, and
- *	        passed on to the callback.  Necessary as some callbacks
- *	        revise the size and location of the target entry, or
- *	        possibly other entries on pre-serialize.
- *
  *	thing:  Pointer to void containing the address of the in core
  *		representation of the target metadata cache entry. 
  *		This is the same pointer returned by a protect of the
@@ -828,7 +820,7 @@ typedef struct H5C_t H5C_t;
  *      The typedef for the get_fsf_size callback is as follows:
  *
  *      typedef herr_t (*H5C_get_fsf_size_t)(const void * thing,
- *                                                size_t *fsf_size_ptr);
+ *                                                hsize_t *fsf_size_ptr);
  *
  *      The parameters of the get_fsf_size callback are as follows:
  *
@@ -837,7 +829,7 @@ typedef struct H5C_t H5C_t;
  *              is the same pointer that would be returned by a protect()
  *              call of the associated addr and len.
  *
- *	fs_size_ptr: Pointer to size_t in which the callback will return
+ *	fs_size_ptr: Pointer to hsize_t in which the callback will return
  *              the size of the piece of file space to be freed.  Note 
  *		that the space to be freed is presumed to have the same 
  *		base address as the cache entry.
@@ -883,14 +875,13 @@ typedef htri_t (*H5C_verify_chksum_func_t)(const void *image_ptr, size_t len, vo
 typedef void *(*H5C_deserialize_func_t)(const void *image_ptr,
     size_t len, void *udata_ptr, hbool_t *dirty_ptr);
 typedef herr_t (*H5C_image_len_func_t)(const void *thing, size_t *image_len_ptr);
-typedef herr_t (*H5C_pre_serialize_func_t)(H5F_t *f, hid_t dxpl_id,
-    void *thing, haddr_t addr, size_t len, haddr_t *new_addr_ptr,
-    size_t *new_len_ptr, unsigned *flags_ptr);
+typedef herr_t (*H5C_pre_serialize_func_t)(H5F_t *f, void *thing, haddr_t addr,
+    size_t len, haddr_t *new_addr_ptr, size_t *new_len_ptr, unsigned *flags_ptr);
 typedef herr_t (*H5C_serialize_func_t)(const H5F_t *f, void *image_ptr,
     size_t len, void *thing);
 typedef herr_t (*H5C_notify_func_t)(H5C_notify_action_t action, void *thing);
 typedef herr_t (*H5C_free_icr_func_t)(void *thing);
-typedef herr_t (*H5C_get_fsf_size_t)(const void * thing, size_t *fsf_size_ptr);
+typedef herr_t (*H5C_get_fsf_size_t)(const void * thing, hsize_t *fsf_size_ptr);
 
 /* Metadata cache client class definition */
 typedef struct H5C_class_t {
@@ -1650,8 +1641,10 @@ typedef struct H5C_cache_entry_t {
     /* fields supporting replacement policies: */
     struct H5C_cache_entry_t   *next;
     struct H5C_cache_entry_t   *prev;
+#if H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS
     struct H5C_cache_entry_t   *aux_next;
     struct H5C_cache_entry_t   *aux_prev;
+#endif /* H5C_MAINTAIN_CLEAN_AND_DIRTY_LRU_LISTS */
 #ifdef H5_HAVE_PARALLEL
     struct H5C_cache_entry_t   *coll_next;
     struct H5C_cache_entry_t   *coll_prev;
@@ -2245,20 +2238,20 @@ H5_DLL void H5C_def_auto_resize_rpt_fcn(H5C_t *cache_ptr, int32_t version,
     double hit_rate, enum H5C_resize_status status,
     size_t old_max_cache_size, size_t new_max_cache_size,
     size_t old_min_clean_size, size_t new_min_clean_size);
-H5_DLL herr_t H5C_dest(H5F_t *f, hid_t dxpl_id);
-H5_DLL herr_t H5C_evict(H5F_t *f, hid_t dxpl_id);
-H5_DLL herr_t H5C_expunge_entry(H5F_t *f, hid_t dxpl_id,
-    const H5C_class_t *type, haddr_t addr, unsigned flags);
-H5_DLL herr_t H5C_flush_cache(H5F_t *f, hid_t dxpl_id, unsigned flags);
-H5_DLL herr_t H5C_flush_tagged_entries(H5F_t * f, hid_t dxpl_id, haddr_t tag); 
-H5_DLL herr_t H5C_force_cache_image_load(H5F_t * f, hid_t dxpl_id);
-H5_DLL herr_t H5C_evict_tagged_entries(H5F_t * f, hid_t dxpl_id, haddr_t tag, hbool_t match_global);
-H5_DLL herr_t H5C_expunge_tag_type_metadata(H5F_t *f, hid_t dxpl_id, haddr_t tag, int type_id, unsigned flags);
+H5_DLL herr_t H5C_dest(H5F_t *f);
+H5_DLL herr_t H5C_evict(H5F_t *f);
+H5_DLL herr_t H5C_expunge_entry(H5F_t *f, const H5C_class_t *type, haddr_t addr,
+    unsigned flags);
+H5_DLL herr_t H5C_flush_cache(H5F_t *f, unsigned flags);
+H5_DLL herr_t H5C_flush_tagged_entries(H5F_t *f, haddr_t tag); 
+H5_DLL herr_t H5C_force_cache_image_load(H5F_t * f);
+H5_DLL herr_t H5C_evict_tagged_entries(H5F_t *f, haddr_t tag, hbool_t match_global);
+H5_DLL herr_t H5C_expunge_tag_type_metadata(H5F_t *f, haddr_t tag, int type_id, unsigned flags);
 H5_DLL herr_t H5C_get_tag(const void *thing, /*OUT*/ haddr_t *tag);
 #if H5C_DO_TAGGING_SANITY_CHECKS
 herr_t H5C_verify_tag(int id, haddr_t tag);
 #endif
-H5_DLL herr_t H5C_flush_to_min_clean(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5C_flush_to_min_clean(H5F_t *f);
 H5_DLL herr_t H5C_get_cache_auto_resize_config(const H5C_t *cache_ptr,
     H5C_auto_size_ctl_t *config_ptr);
 H5_DLL herr_t H5C_get_cache_image_config(const H5C_t * cache_ptr,
@@ -2277,8 +2270,8 @@ H5_DLL void * H5C_get_aux_ptr(const H5C_t *cache_ptr);
 H5_DLL FILE *H5C_get_trace_file_ptr(const H5C_t *cache_ptr);
 H5_DLL FILE *H5C_get_trace_file_ptr_from_entry(const H5C_cache_entry_t *entry_ptr);
 H5_DLL herr_t H5C_image_stats(H5C_t * cache_ptr, hbool_t print_header);
-H5_DLL herr_t H5C_insert_entry(H5F_t *f, hid_t dxpl_id, const H5C_class_t *type,
-    haddr_t addr, void *thing, unsigned int flags);
+H5_DLL herr_t H5C_insert_entry(H5F_t *f, const H5C_class_t *type, haddr_t addr,
+    void *thing, unsigned int flags);
 H5_DLL herr_t H5C_load_cache_image_on_next_protect(H5F_t *f, haddr_t addr, 
    hsize_t len, hbool_t rw);
 H5_DLL herr_t H5C_mark_entry_dirty(void *thing);
@@ -2288,10 +2281,10 @@ H5_DLL herr_t H5C_mark_entry_serialized(void *thing);
 H5_DLL herr_t H5C_move_entry(H5C_t *cache_ptr, const H5C_class_t *type,
     haddr_t old_addr, haddr_t new_addr);
 H5_DLL herr_t H5C_pin_protected_entry(void *thing);
-H5_DLL herr_t H5C_prep_for_file_close(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5C_prep_for_file_close(H5F_t *f);
 H5_DLL herr_t H5C_create_flush_dependency(void *parent_thing, void *child_thing);
-H5_DLL void * H5C_protect(H5F_t *f, hid_t dxpl_id, const H5C_class_t *type,
-    haddr_t addr, void *udata, unsigned flags);
+H5_DLL void * H5C_protect(H5F_t *f, const H5C_class_t *type, haddr_t addr,
+    void *udata, unsigned flags);
 H5_DLL herr_t H5C_reset_cache_hit_rate_stats(H5C_t *cache_ptr);
 H5_DLL herr_t H5C_resize_entry(void *thing, size_t new_size);
 H5_DLL herr_t H5C_set_cache_auto_resize_config(H5C_t *cache_ptr, H5C_auto_size_ctl_t *config_ptr);
@@ -2305,7 +2298,7 @@ H5_DLL herr_t H5C_stats(H5C_t *cache_ptr, const char *cache_name,
 H5_DLL void H5C_stats__reset(H5C_t *cache_ptr);
 H5_DLL herr_t H5C_unpin_entry(void *thing);
 H5_DLL herr_t H5C_destroy_flush_dependency(void *parent_thing, void *child_thing);
-H5_DLL herr_t H5C_unprotect(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *thing,
+H5_DLL herr_t H5C_unprotect(H5F_t *f, haddr_t addr, void *thing,
     unsigned int flags);
 H5_DLL herr_t H5C_validate_cache_image_config(H5C_cache_image_ctl_t * ctl_ptr);
 H5_DLL herr_t H5C_validate_resize_config(H5C_auto_size_ctl_t *config_ptr,
@@ -2324,13 +2317,13 @@ H5_DLL hbool_t H5C_cache_image_pending(const H5C_t *cache_ptr);
 H5_DLL herr_t H5C_get_mdc_image_info(H5C_t *cache_ptr, haddr_t *image_addr, hsize_t *image_len);
 
 #ifdef H5_HAVE_PARALLEL
-H5_DLL herr_t H5C_apply_candidate_list(H5F_t *f, hid_t dxpl_id,
-    H5C_t *cache_ptr, unsigned num_candidates, haddr_t *candidates_list_ptr,
-    int mpi_rank, int mpi_size);
+H5_DLL herr_t H5C_apply_candidate_list(H5F_t *f, H5C_t *cache_ptr,
+    unsigned num_candidates, haddr_t *candidates_list_ptr, int mpi_rank,
+    int mpi_size);
 H5_DLL herr_t H5C_construct_candidate_list__clean_cache(H5C_t *cache_ptr);
 H5_DLL herr_t H5C_construct_candidate_list__min_clean(H5C_t *cache_ptr);
 H5_DLL herr_t H5C_clear_coll_entries(H5C_t * cache_ptr, hbool_t partial);
-H5_DLL herr_t H5C_mark_entries_as_clean(H5F_t *f, hid_t dxpl_id, unsigned ce_array_len,
+H5_DLL herr_t H5C_mark_entries_as_clean(H5F_t *f, unsigned ce_array_len,
     haddr_t *ce_array_ptr);
 #endif /* H5_HAVE_PARALLEL */
 
diff --git a/src/H5Cpublic.h b/src/H5Cpublic.h
index 39ebbe3..62107d9 100644
--- a/src/H5Cpublic.h
+++ b/src/H5Cpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Cquery.c b/src/H5Cquery.c
index 5108013..6c927b0 100644
--- a/src/H5Cquery.c
+++ b/src/H5Cquery.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Ctag.c b/src/H5Ctag.c
index 0170ce9..66aedd9 100644
--- a/src/H5Ctag.c
+++ b/src/H5Ctag.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -39,6 +37,7 @@
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACprivate.h"        /* Metadata cache                       */
 #include "H5Cpkg.h"		/* Cache				*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"		/* Files				*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -56,8 +55,7 @@
 
 /* Typedef for tagged entry iterator callback context - evict tagged entries */
 typedef struct {
-    H5F_t * f;                          /* File pointer for evicting entry */
-    hid_t dxpl_id;                      /* DXPL for evicting entry */
+    H5F_t *f;                           /* File pointer for evicting entry */
     hbool_t evicted_entries_last_pass;  /* Flag to indicate that an entry 
                                          * was evicted when iterating over 
                                          * cache 
@@ -74,8 +72,7 @@ typedef struct {
 
 /* Typedef for tagged entry iterator callback context - expunge tag type metadata */
 typedef struct {
-    H5F_t * f;                          /* File pointer for evicting entry */
-    hid_t dxpl_id;                      /* DXPL for evicting entry */
+    H5F_t *f;                           /* File pointer for evicting entry */
     int type_id;                        /* Cache entry type to expunge */
     unsigned flags;                     /* Flags for expunging entry */
 } H5C_tag_iter_ettm_ctx_t;
@@ -180,7 +177,7 @@ H5C_get_ignore_tags(const H5C_t *cache_ptr)
  *
  * Function:    H5C__tag_entry
  *
- * Purpose:     Tags an entry with the provided tag (contained in the dxpl_id).
+ * Purpose:     Tags an entry with the provided tag (contained in the API context).
  *              If sanity checking is enabled, this function will perform 
  *              validation that a proper tag is contained within the provided 
  *              data access property list id before application.
@@ -193,9 +190,8 @@ H5C_get_ignore_tags(const H5C_t *cache_ptr)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C__tag_entry(H5C_t *cache, H5C_cache_entry_t *entry, hid_t dxpl_id)
+H5C__tag_entry(H5C_t *cache, H5C_cache_entry_t *entry)
 {
-    H5P_genplist_t *dxpl;       /* dataset transfer property list */
     H5C_tag_info_t *tag_info;	/* Points to a tag info struct */
     haddr_t tag;                /* Tag value */
     herr_t ret_value = SUCCEED;  /* Return value */
@@ -207,18 +203,13 @@ H5C__tag_entry(H5C_t *cache, H5C_cache_entry_t *entry, hid_t dxpl_id)
     HDassert(entry != NULL);
     HDassert(cache->magic == H5C__H5C_T_MAGIC);
 
-    /* Get the dataset transfer property list */
-    if(NULL == (dxpl = (H5P_genplist_t *)H5I_object_verify(dxpl_id, H5I_GENPROP_LST)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-
-    /* Get the tag from the DXPL */
-    if((H5P_get(dxpl, H5AC_TAG_NAME, &tag)) < 0)
-	HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to query property value")
+    /* Get the tag */
+    tag = H5CX_get_tag();
 
     if(cache->ignore_tags) {
         /* if we're ignoring tags, it's because we're running
            tests on internal functions and may not have inserted a tag 
-           value into a given dxpl_id before creating some metadata. Thus,
+           value into a given API context before creating some metadata. Thus,
            in this case only, if a tag value has not been set, we can
            arbitrarily set it to something for the sake of passing the tests. 
            If the tag value is set, then we'll just let it get assigned without
@@ -477,12 +468,12 @@ H5C__evict_tagged_entries_cb(H5C_cache_entry_t *entry, void *_ctx)
         ctx->pinned_entries_need_evicted = TRUE;
     else if(!entry->prefetched_dirty) {
         /* Evict the Entry */
-        if(H5C__flush_single_entry(ctx->f, ctx->dxpl_id, entry, H5C__FLUSH_INVALIDATE_FLAG | H5C__FLUSH_CLEAR_ONLY_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
+        if(H5C__flush_single_entry(ctx->f, entry, H5C__FLUSH_INVALIDATE_FLAG | H5C__FLUSH_CLEAR_ONLY_FLAG | H5C__DEL_FROM_SLIST_ON_DESTROY_FLAG) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, H5_ITER_ERROR, "Entry eviction failed.")
         ctx->evicted_entries_last_pass = TRUE;
-    } else {
+    } /* end else-if */
+    else
         ctx->skipped_pf_dirty_entries = TRUE;
-    }
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -503,7 +494,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_evict_tagged_entries(H5F_t * f, hid_t dxpl_id, haddr_t tag, hbool_t match_global)
+H5C_evict_tagged_entries(H5F_t * f, haddr_t tag, hbool_t match_global)
 {
     H5C_t *cache;                   /* Pointer to cache structure */
     H5C_tag_iter_evict_ctx_t ctx;   /* Context for iterator callback */
@@ -521,7 +512,6 @@ H5C_evict_tagged_entries(H5F_t * f, hid_t dxpl_id, haddr_t tag, hbool_t match_gl
 
     /* Construct context for iterator callbacks */
     ctx.f = f;
-    ctx.dxpl_id = dxpl_id;
 
     /* Start evicting entries */
     do {
@@ -723,7 +713,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5C_flush_tagged_entries(H5F_t * f, hid_t dxpl_id, haddr_t tag)
+H5C_flush_tagged_entries(H5F_t *f, haddr_t tag)
 {
     /* Variable Declarations */
     H5C_t      *cache_ptr = NULL;
@@ -743,7 +733,7 @@ H5C_flush_tagged_entries(H5F_t * f, hid_t dxpl_id, haddr_t tag)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't mark tagged entries")
 
     /* Flush all marked entries */
-    if(H5C__flush_marked_entries(f, dxpl_id) < 0)
+    if(H5C__flush_marked_entries(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "Can't flush marked entries")
 
 done:
@@ -822,7 +812,7 @@ H5C__expunge_tag_type_metadata_cb(H5C_cache_entry_t *entry, void *_ctx)
 
     /* Found one with the same tag and type id */
     if(entry->type->id == ctx->type_id)
-        if(H5C_expunge_entry(ctx->f, ctx->dxpl_id, entry->type, entry->addr, ctx->flags) < 0)
+        if(H5C_expunge_entry(ctx->f, entry->type, entry->addr, ctx->flags) < 0)
             HGOTO_ERROR(H5E_CACHE, H5E_CANTEXPUNGE, H5_ITER_ERROR, "can't expunge entry")
 
 done:
@@ -845,8 +835,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t 
-H5C_expunge_tag_type_metadata(H5F_t *f, hid_t dxpl_id, haddr_t tag, int type_id,
-    unsigned flags)
+H5C_expunge_tag_type_metadata(H5F_t *f, haddr_t tag, int type_id, unsigned flags)
 {
     H5C_t *cache;                       /* Pointer to cache structure */
     H5C_tag_iter_ettm_ctx_t ctx;        /* Context for iterator callback */
@@ -864,7 +853,6 @@ H5C_expunge_tag_type_metadata(H5F_t *f, hid_t dxpl_id, haddr_t tag, int type_id,
 
     /* Construct context for iterator callbacks */
     ctx.f = f;
-    ctx.dxpl_id = dxpl_id;
     ctx.type_id = type_id;
     ctx.flags = flags;
 
diff --git a/src/H5Ctest.c b/src/H5Ctest.c
index 876b63a..2cd0a5d 100644
--- a/src/H5Ctest.c
+++ b/src/H5Ctest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5D.c b/src/H5D.c
index 44e4baa..61ccb5a 100644
--- a/src/H5D.c
+++ b/src/H5D.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -24,6 +22,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Datasets 				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free lists                           */
@@ -109,7 +108,6 @@ H5Dcreate2(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
     H5G_loc_t	   loc;                 /* Object location to insert dataset into */
     H5D_t	   *dset = NULL;        /* New dataset's info */
     const H5S_t    *space;              /* Dataspace for dataset */
-    hid_t           dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t           ret_value;          /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -138,12 +136,12 @@ H5Dcreate2(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
         if(TRUE != H5P_isa_class(dcpl_id, H5P_DATASET_CREATE))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not dataset create property list ID")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&dapl_id, H5P_CLS_DACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&dapl_id, H5P_CLS_DACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Create the new dataset & get its ID */
-    if(NULL == (dset = H5D__create_named(&loc, name, type_id, space, lcpl_id, dcpl_id, dapl_id, dxpl_id)))
+    if(NULL == (dset = H5D__create_named(&loc, name, type_id, space, lcpl_id, dcpl_id, dapl_id)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to create dataset")
     if((ret_value = H5I_register(H5I_DATASET, dset, TRUE)) < 0)
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register dataset")
@@ -199,7 +197,6 @@ H5Dcreate_anon(hid_t loc_id, hid_t type_id, hid_t space_id, hid_t dcpl_id,
     H5G_loc_t	   loc;                 /* Object location to insert dataset into */
     H5D_t	   *dset = NULL;        /* New dataset's info */
     const H5S_t    *space;              /* Dataspace for dataset */
-    hid_t           dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t           ret_value;          /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -218,12 +215,12 @@ H5Dcreate_anon(hid_t loc_id, hid_t type_id, hid_t space_id, hid_t dcpl_id,
         if(TRUE != H5P_isa_class(dcpl_id, H5P_DATASET_CREATE))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not dataset create property list ID")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&dapl_id, H5P_CLS_DACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&dapl_id, H5P_CLS_DACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* build and open the new dataset */
-    if(NULL == (dset = H5D__create(loc.oloc->file, type_id, space, dcpl_id, dapl_id, dxpl_id)))
+    if(NULL == (dset = H5D__create_anon(loc.oloc->file, type_id, space, dcpl_id, dapl_id)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to create dataset")
 
     /* Register the new dataset to get an ID for it */
@@ -240,7 +237,7 @@ done:
             HDONE_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get object location of dataset")
 
         /* Decrement refcount on dataset's object header in memory */
-        if(H5O_dec_rc_by_loc(oloc, dxpl_id) < 0)
+        if(H5O_dec_rc_by_loc(oloc) < 0)
            HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
     } /* end if */
 
@@ -275,7 +272,6 @@ H5Dopen2(hid_t loc_id, const char *name, hid_t dapl_id)
 {
     H5D_t       *dset = NULL;
     H5G_loc_t   loc;                    /* Object location of group */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl to use to open datset */
     hid_t       ret_value;
 
     FUNC_ENTER_API(FAIL)
@@ -287,12 +283,12 @@ H5Dopen2(hid_t loc_id, const char *name, hid_t dapl_id)
     if(!name || !*name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&dapl_id, H5P_CLS_DACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&dapl_id, H5P_CLS_DACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Open the dataset */
-    if(NULL == (dset = H5D__open_name(&loc, name, dapl_id, dxpl_id)))
+    if(NULL == (dset = H5D__open_name(&loc, name, dapl_id)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open dataset")
 
     /* Register an atom for the dataset */
@@ -303,6 +299,7 @@ done:
     if(ret_value < 0)
         if(dset && H5D_close(dset) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release dataset")
+
     FUNC_LEAVE_API(ret_value)
 } /* end H5Dopen2() */
 
@@ -367,15 +364,15 @@ H5Dget_space(hid_t dset_id)
     H5D_t	*dset = NULL;
     hid_t	ret_value;
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE1("i", "i", dset_id);
 
     /* Check args */
     if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a dataset")
 
-    if((ret_value = H5D_get_space(dset)) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to get dataspace")
+    if((ret_value = H5D__get_space(dset)) < 0)
+	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, H5I_INVALID_HID, "unable to get dataspace")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -410,7 +407,7 @@ H5Dget_space_status(hid_t dset_id, H5D_space_status_t *allocation)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
 
     /* Read dataspace address and return */
-    if(H5D__get_space_status(dset, allocation, H5AC_ind_read_dxpl_id) < 0)
+    if(H5D__get_space_status(dset, allocation) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to get space status")
 
 done:
@@ -437,7 +434,6 @@ done:
 hid_t
 H5Dget_type(hid_t dset_id)
 {
-
     H5D_t	*dset;                  /* Dataset */
     hid_t	ret_value;              /* Return value */
 
@@ -448,7 +444,7 @@ H5Dget_type(hid_t dset_id)
     if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
 
-    if((ret_value = H5D_get_type(dset)) < 0)
+    if((ret_value = H5D__get_type(dset)) < 0)
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to get dataspace")
 
 done:
@@ -475,18 +471,18 @@ done:
 hid_t
 H5Dget_create_plist(hid_t dset_id)
 {
-    H5D_t		*dataset;                  /* Dataset structure */
-    hid_t		ret_value = SUCCEED;    /* Return value */
+    H5D_t	*dataset;               /* Dataset structure */
+    hid_t	ret_value;    		/* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE1("i", "i", dset_id);
 
     /* Check args */
     if(NULL == (dataset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a dataset")
 
-    if((ret_value = H5D_get_create_plist(dataset)) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "Can't get creation plist")
+    if((ret_value = H5D__get_create_plist(dataset)) < 0)
+	HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, H5I_INVALID_HID, "Can't get creation plist")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -579,7 +575,7 @@ H5Dget_storage_size(hid_t dset_id)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not a dataset")
 
     /* Set return value */
-    if(H5D__get_storage_size(dset, H5AC_ind_read_dxpl_id, &ret_value) < 0)
+    if(H5D__get_storage_size(dset, &ret_value) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, 0, "can't get size of dataset's storage")
 
 done:
@@ -734,13 +730,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Dvlen_reclaim(hid_t type_id, hid_t space_id, hid_t plist_id, void *buf)
+H5Dvlen_reclaim(hid_t type_id, hid_t space_id, hid_t dxpl_id, void *buf)
 {
     H5S_t *space;               /* Dataspace for iteration */
     herr_t ret_value;           /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    H5TRACE4("e", "iii*x", type_id, space_id, plist_id, buf);
+    H5TRACE4("e", "iii*x", type_id, space_id, dxpl_id, buf);
 
     /* Check args */
     if(H5I_DATATYPE != H5I_get_type(type_id) || buf == NULL)
@@ -751,14 +747,17 @@ H5Dvlen_reclaim(hid_t type_id, hid_t space_id, hid_t plist_id, void *buf)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dataspace does not have extent set")
 
     /* Get the default dataset transfer property list if the user didn't provide one */
-    if(H5P_DEFAULT == plist_id)
-        plist_id = H5P_DATASET_XFER_DEFAULT;
+    if(H5P_DEFAULT == dxpl_id)
+        dxpl_id = H5P_DATASET_XFER_DEFAULT;
     else
-        if(TRUE != H5P_isa_class(plist_id, H5P_DATASET_XFER))
+        if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not xfer parms")
 
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
+
     /* Call internal routine */
-    ret_value = H5D_vlen_reclaim(type_id, space, plist_id, buf);
+    ret_value = H5D_vlen_reclaim(type_id, space, buf);
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -793,13 +792,12 @@ herr_t
 H5Dvlen_get_buf_size(hid_t dataset_id, hid_t type_id, hid_t space_id,
         hsize_t *size)
 {
-    H5D_vlen_bufsize_t vlen_bufsize = {0, 0, 0, 0, 0, 0, 0};
+    H5D_vlen_bufsize_t vlen_bufsize = {0, 0, 0, 0, 0, 0};
     H5D_t *dset;                /* Dataset for operation */
     H5S_t *fspace = NULL;       /* Dataset's dataspace */
     H5S_t *mspace = NULL;       /* Memory dataspace */
     char bogus;                 /* bogus value to pass to H5Diterate() */
     H5S_t *space;               /* Dataspace for iteration */
-    H5P_genplist_t  *plist;     /* Property list */
     H5T_t *type;                /* Datatype */
     H5S_sel_iter_op_t dset_op;  /* Operator for iteration */
     herr_t ret_value;           /* Return value */
@@ -839,17 +837,9 @@ H5Dvlen_get_buf_size(hid_t dataset_id, hid_t type_id, hid_t space_id,
     if(NULL == (vlen_bufsize.vl_tbuf = H5FL_BLK_MALLOC(vlen_vl_buf, (size_t)1)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "no temporary buffers available")
 
-    /* Change to the custom memory allocation routines for reading VL data */
-    if((vlen_bufsize.xfer_pid = H5P_create_id(H5P_CLS_DATASET_XFER_g, FALSE)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTCREATE, FAIL, "no dataset xfer plists available")
-
-    /* Get the property list struct */
-    if(NULL == (plist = (H5P_genplist_t *)H5I_object(vlen_bufsize.xfer_pid)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
     /* Set the memory manager to the special allocation routine */
-    if(H5P_set_vlen_mem_manager(plist, H5D__vlen_get_buf_size_alloc, &vlen_bufsize, NULL, NULL) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "can't set VL data allocation routine")
+    if(H5CX_set_vlen_alloc_info(H5D__vlen_get_buf_size_alloc, &vlen_bufsize, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set VL data allocation routine")
 
     /* Set the initial number of bytes required */
     vlen_bufsize.size = 0;
@@ -874,8 +864,6 @@ done:
         vlen_bufsize.fl_tbuf = H5FL_BLK_FREE(vlen_fl_buf, vlen_bufsize.fl_tbuf);
     if(vlen_bufsize.vl_tbuf != NULL)
         vlen_bufsize.vl_tbuf = H5FL_BLK_FREE(vlen_vl_buf, vlen_bufsize.vl_tbuf);
-    if(vlen_bufsize.xfer_pid > 0 && H5I_dec_ref(vlen_bufsize.xfer_pid) < 0)
-        HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "unable to decrement ref count on property list")
 
     FUNC_LEAVE_API(ret_value)
 }   /* end H5Dvlen_get_buf_size() */
@@ -909,12 +897,16 @@ H5Dset_extent(hid_t dset_id, const hsize_t size[])
     if(!size)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no size specified")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(dset_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Private function */
-    if(H5D__set_extent(dset, size, H5AC_ind_read_dxpl_id) < 0)
+    if(H5D__set_extent(dset, size) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to set extend dataset")
 
 done:
-        FUNC_LEAVE_API(ret_value)
+    FUNC_LEAVE_API(ret_value)
 } /* end H5Dset_extent() */
 
 
@@ -933,7 +925,7 @@ done:
 herr_t
 H5Dflush(hid_t dset_id)
 {
-    H5D_t *dset; /* Dataset for this operation */
+    H5D_t *dset;                /* Dataset for this operation */
     herr_t ret_value = SUCCEED; /* return value */
 
     FUNC_ENTER_API(FAIL)
@@ -943,13 +935,13 @@ H5Dflush(hid_t dset_id)
     if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
 
-    /* Flush any dataset information still cached in memory */
-    if(H5D__flush_real(dset, H5AC_ind_read_dxpl_id) < 0)
-        HDONE_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to flush cached dataset info")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(dset_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set collective metadata read info")
 
-    /* Flush object's metadata to file */
-    if(H5O_flush_common(&dset->oloc, dset_id, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to flush dataset and object flush callback")
+    /* Flush dataset information cached in memory */
+    if(H5D__flush(dset, dset_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to flush cached dataset info")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -971,8 +963,8 @@ done:
 herr_t
 H5Drefresh(hid_t dset_id)
 {
-    H5D_t       *dset;                  /* Dataset to refresh */
-    herr_t      ret_value = SUCCEED;    /* return value */
+    H5D_t *dset;                   /* Dataset to refresh */
+    herr_t ret_value = SUCCEED;    /* return value */
     
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", dset_id);
@@ -981,8 +973,12 @@ H5Drefresh(hid_t dset_id)
     if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(dset_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Call private function to refresh the dataset object */
-    if((H5D__refresh(dset_id, dset, H5AC_ind_read_dxpl_id)) < 0)
+    if((H5D__refresh(dset_id, dset)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTLOAD, FAIL, "unable to refresh dataset")
 
 done:
@@ -1019,11 +1015,15 @@ H5Dformat_convert(hid_t dset_id)
     if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(dset_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     switch(dset->shared->layout.type) {
 	case H5D_CHUNKED:
 	    /* Convert the chunk indexing type to version 1 B-tree if not */
 	    if(dset->shared->layout.u.chunk.idx_type != H5D_CHUNK_IDX_BTREE)
-                if((H5D__format_convert(dset, H5AC_ind_read_dxpl_id)) < 0)
+                if((H5D__format_convert(dset)) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTLOAD, FAIL, "unable to downgrade chunk indexing type for dataset")
 	    break;
 
@@ -1031,7 +1031,7 @@ H5Dformat_convert(hid_t dset_id)
 	case H5D_COMPACT:
 	    /* Downgrade the layout version to 3 if greater than 3 */
 	    if(dset->shared->layout.version > H5O_LAYOUT_VERSION_DEFAULT)
-                if((H5D__format_convert(dset, H5AC_ind_read_dxpl_id)) < 0)
+                if((H5D__format_convert(dset)) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTLOAD, FAIL, "unable to downgrade layout version for dataset")
 	    break;
 
@@ -1089,3 +1089,44 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Dget_chunk_index_type() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Dget_chunk_storage_size
+ *
+ * Purpose:     Returns the size of an allocated chunk.
+ *
+ * Return:	Non-negative on success, negative on failure
+ *
+ * Programmer:  Matthew Strong (GE Healthcare)
+ *              20 October 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Dget_chunk_storage_size(hid_t dset_id, const hsize_t *offset, hsize_t *chunk_nbytes)
+{
+    H5D_t       *dset = NULL;
+    herr_t      ret_value = SUCCEED;
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE3("e", "i*h*h", dset_id, offset, chunk_nbytes);
+
+    /* Check arguments */
+    if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+    if( NULL == offset )
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid argument (null)")
+    if( NULL == chunk_nbytes )
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid argument (null)")
+
+    if(H5D_CHUNKED != dset->shared->layout.type)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a chunked dataset")
+
+    /* Call private function */
+    if(H5D__get_chunk_storage_size(dset, offset, chunk_nbytes) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get storage size of chunk")
+
+done:
+    FUNC_LEAVE_API(ret_value);
+} /* H5Dget_chunk_storage_size() */
+
diff --git a/src/H5Dbtree.c b/src/H5Dbtree.c
index 8ef14b9..c23f089 100644
--- a/src/H5Dbtree.c
+++ b/src/H5Dbtree.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer: 	Robb Matzke <matzke@llnl.gov>
@@ -97,23 +95,22 @@ static herr_t H5D__btree_shared_create(const H5F_t *f, H5O_storage_chunk_t *stor
     const H5O_layout_chunk_t *layout);
 
 /* B-tree iterator callbacks */
-static int H5D__btree_idx_iterate_cb(H5F_t *f, hid_t dxpl_id, const void *left_key,
+static int H5D__btree_idx_iterate_cb(H5F_t *f, const void *left_key,
     haddr_t addr, const void *right_key, void *_udata);
 
 /* B-tree callbacks */
 static H5UC_t *H5D__btree_get_shared(const H5F_t *f, const void *_udata);
-static herr_t H5D__btree_new_node(H5F_t *f, hid_t dxpl_id, H5B_ins_t, void *_lt_key,
+static herr_t H5D__btree_new_node(H5F_t *f, H5B_ins_t, void *_lt_key,
     void *_udata, void *_rt_key, haddr_t *addr_p /*out*/);
 static int H5D__btree_cmp2(void *_lt_key, void *_udata, void *_rt_key);
 static int H5D__btree_cmp3(void *_lt_key, void *_udata, void *_rt_key);
-static htri_t H5D__btree_found(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+static htri_t H5D__btree_found(H5F_t *f, haddr_t addr,
     const void *_lt_key, void *_udata);
-static H5B_ins_t H5D__btree_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+static H5B_ins_t H5D__btree_insert(H5F_t *f, haddr_t addr,
     void *_lt_key, hbool_t *lt_key_changed, void *_md_key, void *_udata,
     void *_rt_key, hbool_t *rt_key_changed, haddr_t *new_node/*out*/);
-static H5B_ins_t H5D__btree_remove( H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    void *_lt_key, hbool_t *lt_key_changed, void *_udata, void *_rt_key,
-    hbool_t *rt_key_changed);
+static H5B_ins_t H5D__btree_remove( H5F_t *f, haddr_t addr, void *_lt_key,
+    hbool_t *lt_key_changed, void *_udata, void *_rt_key, hbool_t *rt_key_changed);
 static herr_t H5D__btree_decode_key(const H5B_shared_t *shared, const uint8_t *raw,
     void *_key);
 static herr_t H5D__btree_encode_key(const H5B_shared_t *shared, uint8_t *raw,
@@ -138,7 +135,7 @@ static herr_t H5D__btree_idx_delete(const H5D_chk_idx_info_t *idx_info);
 static herr_t H5D__btree_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     const H5D_chk_idx_info_t *idx_info_dst);
 static herr_t H5D__btree_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id);
+    H5O_storage_chunk_t *storage_dst);
 static herr_t H5D__btree_idx_size(const H5D_chk_idx_info_t *idx_info,
     hsize_t *size);
 static herr_t H5D__btree_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr);
@@ -255,9 +252,8 @@ H5D__btree_get_shared(const H5F_t H5_ATTR_UNUSED *f, const void *_udata)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__btree_new_node(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5B_ins_t op,
-		    void *_lt_key, void *_udata, void *_rt_key,
-		    haddr_t *addr_p/*out*/)
+H5D__btree_new_node(H5F_t *f, H5B_ins_t op, void *_lt_key, void *_udata,
+    void *_rt_key, haddr_t *addr_p/*out*/)
 {
     H5D_btree_key_t	*lt_key = (H5D_btree_key_t *) _lt_key;
     H5D_btree_key_t	*rt_key = (H5D_btree_key_t *) _rt_key;
@@ -440,8 +436,8 @@ H5D__btree_cmp3(void *_lt_key, void *_udata, void *_rt_key)
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5D__btree_found(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t addr, const void *_lt_key,
-		 void *_udata)
+H5D__btree_found(H5F_t H5_ATTR_UNUSED *f, haddr_t addr, const void *_lt_key,
+    void *_udata)
 {
     H5D_chunk_ud_t	   *udata = (H5D_chunk_ud_t *) _udata;
     const H5D_btree_key_t *lt_key = (const H5D_btree_key_t *) _lt_key;
@@ -539,11 +535,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5B_ins_t
-H5D__btree_insert(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t addr, void *_lt_key,
-		  hbool_t *lt_key_changed,
-		  void *_md_key, void *_udata, void *_rt_key,
-		  hbool_t H5_ATTR_UNUSED *rt_key_changed,
-		  haddr_t *new_node_p/*out*/)
+H5D__btree_insert(H5F_t *f, haddr_t addr, void *_lt_key, hbool_t *lt_key_changed,
+    void *_md_key, void *_udata, void *_rt_key, hbool_t H5_ATTR_UNUSED *rt_key_changed,
+    haddr_t *new_node_p/*out*/)
 {
     H5D_btree_key_t	*lt_key = (H5D_btree_key_t *) _lt_key;
     H5D_btree_key_t	*md_key = (H5D_btree_key_t *) _md_key;
@@ -632,7 +626,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5B_ins_t
-H5D__btree_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key /*in,out */ ,
+H5D__btree_remove(H5F_t *f, haddr_t addr, void *_lt_key /*in,out */ ,
 	hbool_t *lt_key_changed /*out */ ,
 	void H5_ATTR_UNUSED * _udata /*in,out */ ,
 	void H5_ATTR_UNUSED * _rt_key /*in,out */ ,
@@ -645,7 +639,7 @@ H5D__btree_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key /*in,out
 
     /* Remove raw data chunk from file */
     H5_CHECK_OVERFLOW(lt_key->nbytes, uint32_t, hsize_t);
-    if(H5MF_xfree(f, H5FD_MEM_DRAW, dxpl_id, addr, (hsize_t)lt_key->nbytes) < 0)
+    if(H5MF_xfree(f, H5FD_MEM_DRAW, addr, (hsize_t)lt_key->nbytes) < 0)
 	HGOTO_ERROR(H5E_STORAGE, H5E_CANTFREE, H5B_INS_ERROR, "unable to free chunk")
 
     /* Mark keys as unchanged */
@@ -942,7 +936,7 @@ H5D__btree_idx_create(const H5D_chk_idx_info_t *idx_info)
     udata.storage = idx_info->storage;
 
     /* Create the v1 B-tree for the chunk index */
-    if(H5B_create(idx_info->f, idx_info->dxpl_id, H5B_BTREE, &udata, &(idx_info->storage->idx_addr)/*out*/) < 0)
+    if(H5B_create(idx_info->f, H5B_BTREE, &udata, &(idx_info->storage->idx_addr)/*out*/) < 0)
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't create B-tree")
 
 done:
@@ -1006,7 +1000,7 @@ H5D__btree_idx_insert(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata,
      * Create the chunk it if it doesn't exist, or reallocate the chunk if
      * its size changed.
      */
-    if(H5B_insert(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
+    if(H5B_insert(idx_info->f, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
         HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to allocate chunk")
 
 done:
@@ -1045,7 +1039,7 @@ H5D__btree_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udat
     HDassert(udata);
 
     /* Go get the chunk information from the B-tree */
-    if(H5B_find(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
+    if(H5B_find(idx_info->f, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk info")
 
 done:
@@ -1069,9 +1063,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static int
-H5D__btree_idx_iterate_cb(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    const void *_lt_key, haddr_t addr, const void H5_ATTR_UNUSED *_rt_key,
-    void *_udata)
+H5D__btree_idx_iterate_cb(H5F_t H5_ATTR_UNUSED *f, const void *_lt_key,
+    haddr_t addr, const void H5_ATTR_UNUSED *_rt_key, void *_udata)
 {
     H5D_btree_it_ud_t	*udata = (H5D_btree_it_ud_t *)_udata; /* User data */
     const H5D_btree_key_t	*lt_key = (const H5D_btree_key_t *)_lt_key; /* B-tree key for chunk */
@@ -1139,7 +1132,7 @@ H5D__btree_idx_iterate(const H5D_chk_idx_info_t *idx_info,
     udata.udata = chunk_udata;
 
     /* Iterate over existing chunks */
-    if((ret_value = H5B_iterate(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, H5D__btree_idx_iterate_cb, &udata)) < 0)
+    if((ret_value = H5B_iterate(idx_info->f, H5B_BTREE, idx_info->storage->idx_addr, H5D__btree_idx_iterate_cb, &udata)) < 0)
         HERROR(H5E_DATASET, H5E_BADITER, "unable to iterate over chunk B-tree");
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1176,7 +1169,7 @@ H5D__btree_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t
     /* Remove the chunk from the v1 B-tree index and release the space for the
      * chunk (in the B-tree callback).
      */
-    if(H5B_remove(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
+    if(H5B_remove(idx_info->f, H5B_BTREE, idx_info->storage->idx_addr, udata) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, FAIL, "unable to remove chunk entry")
 
 done:
@@ -1230,7 +1223,7 @@ H5D__btree_idx_delete(const H5D_chk_idx_info_t *idx_info)
         udata.storage = &tmp_storage;
 
         /* Delete entire B-tree */
-        if(H5B_delete(idx_info->f, idx_info->dxpl_id, H5B_BTREE, tmp_storage.idx_addr, &udata) < 0)
+        if(H5B_delete(idx_info->f, H5B_BTREE, tmp_storage.idx_addr, &udata) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, FAIL, "unable to delete chunk B-tree")
 
         /* Release the shared B-tree page */
@@ -1263,7 +1256,7 @@ H5D__btree_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
 {
     herr_t      ret_value = SUCCEED;        /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__COPIED_TAG)
 
     HDassert(idx_info_src);
     HDassert(idx_info_src->f);
@@ -1289,7 +1282,7 @@ H5D__btree_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     HDassert(H5F_addr_defined(idx_info_dst->storage->idx_addr));
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__btree_idx_copy_setup() */
 
 
@@ -1307,8 +1300,7 @@ done:
  */
 static herr_t
 H5D__btree_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst,
-    hid_t H5_ATTR_UNUSED dxpl_id)
+    H5O_storage_chunk_t *storage_dst)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -1364,7 +1356,7 @@ H5D__btree_idx_size(const H5D_chk_idx_info_t *idx_info, hsize_t *index_size)
     udata.storage = idx_info->storage;
 
     /* Get metadata information for B-tree */
-    if(H5B_get_info(idx_info->f, idx_info->dxpl_id, H5B_BTREE, idx_info->storage->idx_addr, &bt_info, NULL, &udata) < 0)
+    if(H5B_get_info(idx_info->f, H5B_BTREE, idx_info->storage->idx_addr, &bt_info, NULL, &udata) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "unable to iterate over chunk B-tree")
 
     /* Set the size of the B-tree */
@@ -1478,7 +1470,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D_btree_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
+H5D_btree_debug(H5F_t *f, haddr_t addr, FILE * stream, int indent,
     int fwidth, unsigned ndims, const uint32_t *dim)
 {
     H5D_btree_dbg_t     udata;          /* User data for B-tree callback */
@@ -1512,7 +1504,7 @@ H5D_btree_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent
     udata.ndims = ndims;
 
     /* Dump the records for the B-tree */
-    (void)H5B_debug(f, dxpl_id, addr, stream, indent, fwidth, H5B_BTREE, &udata);
+    (void)H5B_debug(f, addr, stream, indent, fwidth, H5B_BTREE, &udata);
 
 done:
     if(shared_init) {
diff --git a/src/H5Dbtree2.c b/src/H5Dbtree2.c
index f687a5d..f9074be 100644
--- a/src/H5Dbtree2.c
+++ b/src/H5Dbtree2.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* 
@@ -62,12 +60,6 @@ typedef struct H5D_bt2_ctx_t {
     uint32_t *dim;		/* Size of chunk in elements */
 } H5D_bt2_ctx_t;
 
-/* User data for the chunk's removal callback routine */
-typedef struct H5D_bt2_remove_ud_t {
-    H5F_t *f;                   /* File pointer for operation */
-    hid_t dxpl_id;              /* DXPL ID for operation */
-} H5D_bt2_remove_ud_t;
-
 /* Callback info for iteration over chunks in v2 B-tree */
 typedef struct H5D_bt2_it_ud_t {
     H5D_chunk_cb_func_t cb;     /* Callback routine for the chunk */
@@ -139,7 +131,7 @@ static herr_t H5D__bt2_idx_delete(const H5D_chk_idx_info_t *idx_info);
 static herr_t H5D__bt2_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     const H5D_chk_idx_info_t *idx_info_dst);
 static herr_t H5D__bt2_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id);
+    H5O_storage_chunk_t *storage_dst);
 static herr_t H5D__bt2_idx_size(const H5D_chk_idx_info_t *idx_info, hsize_t *size);
 static herr_t H5D__bt2_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr);
 static herr_t H5D__bt2_idx_dump(const H5O_storage_chunk_t *storage,
@@ -666,7 +658,7 @@ H5D__btree2_idx_depend(const H5D_chk_idx_info_t *idx_info)
     oloc.addr = idx_info->storage->u.btree.dset_ohdr_addr;
 
     /* Get header */
-    if(NULL == (oh = H5O_protect(&oloc, idx_info->dxpl_id, H5AC__READ_ONLY_FLAG, TRUE)))
+    if(NULL == (oh = H5O_protect(&oloc, H5AC__READ_ONLY_FLAG, TRUE)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Retrieve the dataset's object header proxy */
@@ -674,12 +666,12 @@ H5D__btree2_idx_depend(const H5D_chk_idx_info_t *idx_info)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get dataset object header proxy")
 
     /* Make the v2 B-tree a child flush dependency of the dataset's object header proxy */
-    if(H5B2_depend(idx_info->storage->u.btree2.bt2, idx_info->dxpl_id, oh_proxy) < 0)
+    if(H5B2_depend(idx_info->storage->u.btree2.bt2, oh_proxy) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTDEPEND, FAIL, "unable to create flush dependency on object header proxy")
 
 done:
     /* Release the object header from the cache */
-    if(oh && H5O_unprotect(&oloc, idx_info->dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(&oloc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_DATASET, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -728,7 +720,7 @@ H5D__bt2_idx_open(const H5D_chk_idx_info_t *idx_info)
     u_ctx.dim = idx_info->layout->dim;
 
     /* Open v2 B-tree for the chunk index */
-    if(NULL == (idx_info->storage->u.btree2.bt2 = H5B2_open(idx_info->f, idx_info->dxpl_id, idx_info->storage->idx_addr, &u_ctx)))
+    if(NULL == (idx_info->storage->u.btree2.bt2 = H5B2_open(idx_info->f, idx_info->storage->idx_addr, &u_ctx)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't open v2 B-tree for tracking chunked dataset")
 
     /* Check for SWMR writes to the file */
@@ -800,7 +792,7 @@ H5D__bt2_idx_create(const H5D_chk_idx_info_t *idx_info)
     u_ctx.dim = idx_info->layout->dim;
 
     /* Create the v2 B-tree for the chunked dataset */
-    if(NULL == (idx_info->storage->u.btree2.bt2 = H5B2_create(idx_info->f, idx_info->dxpl_id, &bt2_cparam, &u_ctx)))
+    if(NULL == (idx_info->storage->u.btree2.bt2 = H5B2_create(idx_info->f, &bt2_cparam, &u_ctx)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCREATE, FAIL, "can't create v2 B-tree for tracking chunked dataset")
 
     /* Retrieve the v2 B-tree's address in the file */
@@ -949,7 +941,7 @@ H5D__bt2_idx_insert(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata,
         bt2_udata.rec.scaled[u] = udata->common.scaled[u];
 
     /* Update record for v2 B-tree (could be insert or modify) */
-    if(H5B2_update(bt2, idx_info->dxpl_id, &bt2_udata, H5D__bt2_mod_cb, &bt2_udata) < 0)
+    if(H5B2_update(bt2, &bt2_udata, H5D__bt2_mod_cb, &bt2_udata) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTUPDATE, FAIL, "unable to update record in v2 B-tree")
 
 done:
@@ -1043,7 +1035,7 @@ H5D__bt2_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata)
         bt2_udata.rec.scaled[u] = udata->common.scaled[u];
 
     /* Go get chunk information from v2 B-tree */
-    if(H5B2_find(bt2, idx_info->dxpl_id, &bt2_udata, H5D__bt2_found_cb, &found_rec) < 0)
+    if(H5B2_find(bt2, &bt2_udata, H5D__bt2_found_cb, &found_rec) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in v2 B-tree")
 
     /* Set common info for the chunk */
@@ -1157,7 +1149,7 @@ H5D__bt2_idx_iterate(const H5D_chk_idx_info_t *idx_info,
     udata.udata = chunk_udata;
 
     /* Iterate over the records in the v2 B-tree */
-    if((ret_value = H5B2_iterate(bt2, idx_info->dxpl_id, H5D__bt2_idx_iterate_cb, &udata)) < 0)
+    if((ret_value = H5B2_iterate(bt2, H5D__bt2_idx_iterate_cb, &udata)) < 0)
         HERROR(H5E_DATASET, H5E_BADITER, "unable to iterate over chunk v2 B-tree");
 
 done:
@@ -1184,18 +1176,17 @@ static herr_t
 H5D__bt2_remove_cb(const void *_record, void *_udata)
 {
     const H5D_chunk_rec_t *record = (const H5D_chunk_rec_t *)_record;	/* The native record */
-    H5D_bt2_remove_ud_t *udata = (H5D_bt2_remove_ud_t *)_udata;	/* User data for removal callback */
+    H5F_t *f = (H5F_t *)_udata;         /* User data for removal callback */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
 
     /* Sanity checks */
-    HDassert(udata);
-    HDassert(udata->f);
+    HDassert(f);
 
     /* Free the space in the file for the object being removed */
     H5_CHECK_OVERFLOW(record->nbytes, uint32_t, hsize_t);
-    if(H5MF_xfree(udata->f, H5FD_MEM_DRAW, udata->dxpl_id, record->chunk_addr, (hsize_t)record->nbytes) < 0)
+    if(H5MF_xfree(f, H5FD_MEM_DRAW, record->chunk_addr, (hsize_t)record->nbytes) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to free chunk")
 
 done:
@@ -1218,7 +1209,6 @@ static herr_t
 H5D__bt2_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t *udata)
 {
     H5B2_t 	*bt2;                   /* v2 B-tree handle for indexing chunks */
-    H5D_bt2_remove_ud_t remove_udata;	/* User data for removal callback */
     H5D_bt2_ud_t bt2_udata;             /* User data for v2 B-tree find call */
     unsigned 	u;			/* Local index variable */
     herr_t	ret_value = SUCCEED;	/* Return value */
@@ -1247,10 +1237,6 @@ H5D__bt2_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t *u
     /* Set convenience pointer to v2 B-tree structure */
     bt2 = idx_info->storage->u.btree2.bt2;
 
-    /* Initialize user data for removal callback */
-    remove_udata.f = idx_info->f;
-    remove_udata.dxpl_id = idx_info->dxpl_id;
-
     /* Prepare user data for compare callback */
     bt2_udata.ndims = idx_info->layout->ndims - 1;
 
@@ -1260,7 +1246,7 @@ H5D__bt2_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t *u
 
     /* Remove the record for the "dataset chunk" object from the v2 B-tree */
     /* (space in the file for the object is freed in the 'remove' callback) */
-    if(H5B2_remove(bt2, idx_info->dxpl_id, &bt2_udata, (H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE) ? NULL : H5D__bt2_remove_cb, &remove_udata) < 0)
+    if(H5B2_remove(bt2, &bt2_udata, (H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE) ? NULL : H5D__bt2_remove_cb, idx_info->f) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "can't remove object from B-tree")
 
 done:
@@ -1291,7 +1277,6 @@ done:
 static herr_t
 H5D__bt2_idx_delete(const H5D_chk_idx_info_t *idx_info)
 {
-    H5D_bt2_remove_ud_t remove_udata;	/* User data for removal callback */
     H5B2_remove_t remove_op;		/* The removal callback */
     H5D_bt2_ctx_ud_t u_ctx;		/* data for context call */
     herr_t ret_value = SUCCEED;     	/* Return value */
@@ -1313,10 +1298,6 @@ H5D__bt2_idx_delete(const H5D_chk_idx_info_t *idx_info)
 	u_ctx.chunk_size = idx_info->layout->size;
 	u_ctx.dim = idx_info->layout->dim;
 
-	/* Initialize user data for removal callback */
-	remove_udata.f = idx_info->f;
-	remove_udata.dxpl_id = idx_info->dxpl_id;
-
 	/* Set remove operation.  Do not remove chunks in SWMR_WRITE mode */
         if(H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE)
             remove_op = NULL;
@@ -1325,7 +1306,7 @@ H5D__bt2_idx_delete(const H5D_chk_idx_info_t *idx_info)
 
 	/* Delete the v2 B-tree */
 	/*(space in the file for each object is freed in the 'remove' callback) */
-	if(H5B2_delete(idx_info->f, idx_info->dxpl_id, idx_info->storage->idx_addr, &u_ctx, remove_op, &remove_udata) < 0)
+	if(H5B2_delete(idx_info->f, idx_info->storage->idx_addr, &u_ctx, remove_op, idx_info->f) < 0)
 	    HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, FAIL, "can't delete v2 B-tree")
 
 	idx_info->storage->idx_addr = HADDR_UNDEF;
@@ -1376,7 +1357,7 @@ H5D__bt2_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "can't open v2 B-tree")
 
     /* Set copied metadata tag */
-    H5_BEGIN_TAG(idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL);
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Create v2 B-tree that describes the chunked dataset in the destination file */
     if(H5D__bt2_idx_create(idx_info_dst) < 0)
@@ -1384,7 +1365,7 @@ H5D__bt2_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     HDassert(H5F_addr_defined(idx_info_dst->storage->idx_addr));
 
     /* Reset metadata tag */
-    H5_END_TAG(FAIL);
+    H5_END_TAG
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1404,7 +1385,7 @@ done:
  */
 static herr_t
 H5D__bt2_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t H5_ATTR_UNUSED dxpl_id)
+    H5O_storage_chunk_t *storage_dst)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -1417,12 +1398,12 @@ H5D__bt2_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
     HDassert(storage_dst->u.btree2.bt2);
 
     /* Close v2 B-tree for source file */
-    if(H5B2_close(storage_src->u.btree2.bt2, dxpl_id) < 0)
+    if(H5B2_close(storage_src->u.btree2.bt2) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close v2 B-tree")
     storage_src->u.btree2.bt2 = NULL;
 
     /* Close v2 B-tree for destination file */
-    if(H5B2_close(storage_dst->u.btree2.bt2, dxpl_id) < 0)
+    if(H5B2_close(storage_dst->u.btree2.bt2) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close v2 B-tree")
     storage_dst->u.btree2.bt2 = NULL;
 
@@ -1468,12 +1449,12 @@ H5D__bt2_idx_size(const H5D_chk_idx_info_t *idx_info, hsize_t *index_size)
     bt2_cdset = idx_info->storage->u.btree2.bt2;
 
     /* Get v2 B-tree size for indexing chunked dataset */
-    if(H5B2_size(bt2_cdset, idx_info->dxpl_id, index_size) < 0)
+    if(H5B2_size(bt2_cdset, index_size) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve v2 B-tree storage info for chunked dataset")
 
 done:
     /* Close v2 B-tree index */
-    if(bt2_cdset && H5B2_close(bt2_cdset, idx_info->dxpl_id) < 0)
+    if(bt2_cdset && H5B2_close(bt2_cdset) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for tracking chunked dataset")
     idx_info->storage->u.btree2.bt2 = NULL;
 
@@ -1566,7 +1547,7 @@ H5D__bt2_idx_dest(const H5D_chk_idx_info_t *idx_info)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "can't patch v2 B-tree file pointer")
 
         /* Close v2 B-tree */
-	if(H5B2_close(idx_info->storage->u.btree2.bt2, idx_info->dxpl_id) < 0)
+	if(H5B2_close(idx_info->storage->u.btree2.bt2) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree")
         idx_info->storage->u.btree2.bt2 = NULL;
     } /* end if */
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index 7ab9658..7216c49 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer: 	Quincey Koziol <koziol@hdfgroup.org>
@@ -54,6 +52,7 @@
 #ifdef H5_HAVE_PARALLEL
 #include "H5ACprivate.h"	/* Metadata cache			*/
 #endif /* H5_HAVE_PARALLEL */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Dataset functions			*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fprivate.h"		/* File functions			*/
@@ -190,6 +189,10 @@ typedef struct H5D_chunk_it_ud3_t {
 
     /* needed for copy object pointed by refs */
     H5O_copy_t          *cpy_info;              /* Copy options */
+
+    /* needed for getting raw data from chunk cache */
+    hbool_t             chunk_in_cache;
+    uint8_t	            *chunk;		                /* the unfiltered chunk data		*/
 } H5D_chunk_it_ud3_t;
 
 /* Callback info for iteration to dump index */
@@ -211,7 +214,6 @@ typedef struct H5D_chunk_it_ud5_t {
 typedef struct H5D_chunk_readvv_ud_t {
     unsigned char *rbuf;        /* Read buffer to initialize */
     const H5D_t *dset;          /* Dataset to operate on */
-    hid_t dxpl_id;              /* DXPL for operation */
 } H5D_chunk_readvv_ud_t;
 
 /* Callback info for file selection iteration */
@@ -236,8 +238,7 @@ typedef struct H5D_chunk_coll_info_t {
 
 /* Chunked layout operation callbacks */
 static herr_t H5D__chunk_construct(H5F_t *f, H5D_t *dset);
-static herr_t H5D__chunk_init(H5F_t *f, hid_t dxpl_id, const H5D_t *dset,
-    hid_t dapl_id);
+static herr_t H5D__chunk_init(H5F_t *f, const H5D_t *dset, hid_t dapl_id);
 static herr_t H5D__chunk_io_init(const H5D_io_info_t *io_info,
     const H5D_type_info_t *type_info, hsize_t nelmts, const H5S_t *file_space,
     const H5S_t *mem_space, H5D_chunk_map_t *fm);
@@ -247,9 +248,9 @@ static herr_t H5D__chunk_read(H5D_io_info_t *io_info, const H5D_type_info_t *typ
 static herr_t H5D__chunk_write(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     hsize_t nelmts, const H5S_t *file_space, const H5S_t *mem_space,
     H5D_chunk_map_t *fm);
-static herr_t H5D__chunk_flush(H5D_t *dset, hid_t dxpl_id);
+static herr_t H5D__chunk_flush(H5D_t *dset);
 static herr_t H5D__chunk_io_term(const H5D_chunk_map_t *fm);
-static herr_t H5D__chunk_dest(H5D_t *dset, hid_t dxpl_id);
+static herr_t H5D__chunk_dest(H5D_t *dset);
 
 /* "Nonexistent" layout operation callback */
 static ssize_t
@@ -283,28 +284,26 @@ static herr_t H5D__chunk_file_cb(void *elem, const H5T_t *type, unsigned ndims,
 static herr_t H5D__chunk_mem_cb(void *elem, const H5T_t *type, unsigned ndims,
     const hsize_t *coords, void *fm);
 static unsigned H5D__chunk_hash_val(const H5D_shared_t *shared, const hsize_t *scaled);
-static herr_t H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id,
-    const H5D_dxpl_cache_t *dxpl_cache, H5D_rdcc_ent_t *ent, hbool_t reset);
-static herr_t H5D__chunk_cache_evict(const H5D_t *dset, hid_t dxpl_id,
-    const H5D_dxpl_cache_t *dxpl_cache, H5D_rdcc_ent_t *ent, hbool_t flush);
+static herr_t H5D__chunk_flush_entry(const H5D_t *dset, H5D_rdcc_ent_t *ent,
+    hbool_t reset);
+static herr_t H5D__chunk_cache_evict(const H5D_t *dset, H5D_rdcc_ent_t *ent,
+    hbool_t flush);
 static hbool_t H5D__chunk_is_partial_edge_chunk(unsigned dset_ndims,
     const uint32_t *chunk_dims, const hsize_t *chunk_scaled, const hsize_t *dset_dims);
 static void *H5D__chunk_lock(const H5D_io_info_t *io_info,
     H5D_chunk_ud_t *udata, hbool_t relax, hbool_t prev_unfilt_chunk);
 static herr_t H5D__chunk_unlock(const H5D_io_info_t *io_info,
-    const H5D_chunk_ud_t *udata, hbool_t dirty, void *chunk,
-    uint32_t naccessed);
-static herr_t H5D__chunk_cache_prune(const H5D_t *dset, hid_t dxpl_id,
-    const H5D_dxpl_cache_t *dxpl_cache, size_t size);
+    const H5D_chunk_ud_t *udata, hbool_t dirty, void *chunk, uint32_t naccessed);
+static herr_t H5D__chunk_cache_prune(const H5D_t *dset, size_t size);
 static herr_t H5D__chunk_prune_fill(H5D_chunk_it_ud1_t *udata, hbool_t new_unfilt_chunk);
-static herr_t H5D__chunk_file_alloc(const H5D_chk_idx_info_t *idx_info,
-    const H5F_block_t *old_chunk, H5F_block_t *new_chunk, hbool_t *need_insert,
-    hsize_t scaled[]);
 #ifdef H5_HAVE_PARALLEL
-static herr_t H5D__chunk_collective_fill(const H5D_t *dset, hid_t dxpl_id,
+static herr_t H5D__chunk_collective_fill(const H5D_t *dset, 
     H5D_chunk_coll_info_t *chunk_info, size_t chunk_size, const void *fill_buf);
 #endif /* H5_HAVE_PARALLEL */
 
+static int
+H5D__chunk_dump_index_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata);
+
 /*********************/
 /* Package Variables */
 /*********************/
@@ -371,8 +370,7 @@ H5FL_EXTERN(H5S_sel_iter_t);
 /*-------------------------------------------------------------------------
  * Function:	H5D__chunk_direct_write
  *
- * Purpose:	Internal routine to write a chunk 
- *              directly into the file.
+ * Purpose:	Internal routine to write a chunk directly into the file.
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -382,8 +380,8 @@ H5FL_EXTERN(H5S_sel_iter_t);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters, 
-    hsize_t *offset, uint32_t data_size, const void *buf)
+H5D__chunk_direct_write(const H5D_t *dset, uint32_t filters, hsize_t *offset,
+    uint32_t data_size, const void *buf)
 {
     const H5O_layout_t *layout = &(dset->shared->layout);       /* Dataset layout */
     H5D_chunk_ud_t udata;               /* User data for querying chunk info */
@@ -391,35 +389,25 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters,
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
     hsize_t scaled[H5S_MAX_RANK];       /* Scaled coordinates for this chunk */
     hbool_t need_insert = FALSE;        /* Whether the chunk needs to be inserted into the index */
-    H5D_io_info_t io_info;              /* to hold the dset and two dxpls (meta and raw data) */
-    hbool_t md_dxpl_generated = FALSE;  /* bool to indicate whether we should free the md_dxpl_id at exit */
+    H5D_io_info_t io_info;              /* to hold the dset info */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, dset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(dset->oloc.addr)
 
     io_info.dset = dset;
-    io_info.raw_dxpl_id = dxpl_id;
-    io_info.md_dxpl_id = dxpl_id;
-
-    /* set the dxpl IO type for sanity checking at the FD layer */
-#ifdef H5_DEBUG_BUILD
-    if(H5D_set_io_info_dxpls(&io_info, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't set metadata and raw data dxpls")
-    md_dxpl_generated = TRUE;
-#endif /* H5_DEBUG_BUILD */
 
     /* Allocate dataspace and initialize it if it hasn't been. */
-    if(!(*layout->ops->is_space_alloc)(&layout->storage)) {
- 	/* Allocate storage */
+    if(!(*layout->ops->is_space_alloc)(&layout->storage))
+        /* Allocate storage */
         if(H5D__alloc_storage(&io_info, H5D_ALLOC_WRITE, FALSE, NULL) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize storage")
-    }
+
     /* Calculate the index of this chunk */
     H5VM_chunk_scaled(dset->shared->ndims, offset, layout->u.chunk.dim, scaled);
     scaled[dset->shared->ndims] = 0;
 
     /* Find out the file address of the chunk (if any) */
-    if(H5D__chunk_lookup(dset, io_info.md_dxpl_id, scaled, &udata) < 0)
+    if(H5D__chunk_lookup(dset, scaled, &udata) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
 
     /* Sanity check */
@@ -437,7 +425,6 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters,
 
     /* Compose chunked index info struct */
     idx_info.f = dset->oloc.file;
-    idx_info.dxpl_id = io_info.md_dxpl_id;
     idx_info.pline = &(dset->shared->dcpl_cache.pline);
     idx_info.layout = &(dset->shared->layout.u.chunk);
     idx_info.storage = &(dset->shared->layout.storage.u.chunk);
@@ -445,11 +432,15 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters,
     /* Set up the size of chunk for user data */
     udata.chunk_block.length = data_size;
 
-    /* Create the chunk it if it doesn't exist, or reallocate the chunk
-     *  if its size changed.
-     */
-    if(H5D__chunk_file_alloc(&idx_info, &old_chunk, &udata.chunk_block, &need_insert, scaled) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate chunk")
+    if(0 == idx_info.pline->nused && H5F_addr_defined(old_chunk.offset))
+        /* If there are no filters and we are overwriting the chunk we can just set values */
+        need_insert = FALSE;
+    else
+        /* Otherwise, create the chunk it if it doesn't exist, or reallocate the chunk
+         * if its size has changed.
+         */
+        if(H5D__chunk_file_alloc(&idx_info, &old_chunk, &udata.chunk_block, &need_insert, scaled) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate chunk")
 
     /* Make sure the address of the chunk is returned. */
     if(!H5F_addr_defined(udata.chunk_block.offset))
@@ -458,20 +449,14 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters,
     /* Evict the (old) entry from the cache if present, but do not flush
      * it to disk */
     if(UINT_MAX != udata.idx_hint) {
-        H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-        H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
         const H5D_rdcc_t *rdcc = &(dset->shared->cache.chunk);	/*raw data chunk cache */
 
-        /* Fill the DXPL cache values for later use */
-        if(H5D__get_dxpl_cache(io_info.raw_dxpl_id, &dxpl_cache) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
-        if(H5D__chunk_cache_evict(dset, io_info.md_dxpl_id, dxpl_cache, rdcc->slot[udata.idx_hint], FALSE) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk")
+        if(H5D__chunk_cache_evict(dset, rdcc->slot[udata.idx_hint], FALSE) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk")
     } /* end if */
 
     /* Write the data to the file */
-    if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, data_size, io_info.raw_dxpl_id, buf) < 0)
+    if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, data_size, buf) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to write raw data to file")
 
     /* Insert the chunk record into the index */
@@ -479,20 +464,210 @@ H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters,
         /* Set the chunk's filter mask to the new settings */
         udata.filter_mask = filters;
 
-        if((layout->storage.u.chunk.ops->insert)(&idx_info, &udata, NULL) < 0)
+        if((layout->storage.u.chunk.ops->insert)(&idx_info, &udata, dset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert chunk addr into index")
     } /* end if */
 
 done:
-#ifdef H5_DEBUG_BUILD
-    if(md_dxpl_generated && H5I_dec_ref(io_info.md_dxpl_id) < 0)
-        HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "can't close metadata dxpl")
-#endif /* H5_DEBUG_BUILD */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__chunk_direct_write() */
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5D__chunk_direct_read
+ *
+ * Purpose:     Internal routine to read a chunk directly from the file.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Matthew Strong (GE Healthcare)
+ *              14 February 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5D__chunk_direct_read(const H5D_t *dset, hsize_t *offset, uint32_t* filters,
+    void *buf)
+{
+    const H5O_layout_t *layout = &(dset->shared->layout);    /* Dataset layout */
+    const H5D_rdcc_t   *rdcc = &(dset->shared->cache.chunk); /* raw data chunk cache */
+    H5D_chunk_ud_t     udata;          /* User data for querying chunk info */
+    hsize_t scaled[H5S_MAX_RANK];       /* Scaled coordinates for this chunk */
+    herr_t             ret_value = SUCCEED;        /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL_TAG(dset->oloc.addr)
+
+    /* Check args */
+    HDassert(dset && H5D_CHUNKED == layout->type);
+    HDassert(offset);
+    HDassert(filters);
+    HDassert(buf);
+
+    *filters = 0;
+
+    /* Allocate dataspace and initialize it if it hasn't been. */
+    if(!(*layout->ops->is_space_alloc)(&layout->storage))
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "storage is not initialized")
+
+    /* Calculate the index of this chunk */
+    H5VM_chunk_scaled(dset->shared->ndims, offset, layout->u.chunk.dim, scaled);
+    scaled[dset->shared->ndims] = 0;
+
+    /* Reset fields about the chunk we are looking for */
+    udata.filter_mask = 0;
+    udata.chunk_block.offset = HADDR_UNDEF;
+    udata.chunk_block.length = 0;
+    udata.idx_hint = UINT_MAX;
+
+    /* Find out the file address of the chunk */
+    if(H5D__chunk_lookup(dset, scaled, &udata) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
+
+    /* Sanity check */
+    HDassert((H5F_addr_defined(udata.chunk_block.offset) && udata.chunk_block.length > 0) ||
+            (!H5F_addr_defined(udata.chunk_block.offset) && udata.chunk_block.length == 0));
+
+    /* Check if the requested chunk exists in the chunk cache */
+    if(UINT_MAX != udata.idx_hint) {
+        H5D_rdcc_ent_t *ent = rdcc->slot[udata.idx_hint];
+        hbool_t flush;
+
+        /* Sanity checks  */
+        HDassert(udata.idx_hint < rdcc->nslots);
+        HDassert(rdcc->slot[udata.idx_hint]);
+
+        flush = (ent->dirty == TRUE) ? TRUE : FALSE;
+
+        /* Flush the chunk to disk and clear the cache entry */
+        if(H5D__chunk_cache_evict(dset, rdcc->slot[udata.idx_hint], flush) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk")
+
+        /* Reset fields about the chunk we are looking for */
+        udata.filter_mask = 0;
+        udata.chunk_block.offset = HADDR_UNDEF;
+        udata.chunk_block.length = 0;
+        udata.idx_hint = UINT_MAX;
+
+        /* Get the new file address / chunk size after flushing */
+        if(H5D__chunk_lookup(dset, scaled, &udata) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
+    } /* end if */
+
+    /* Make sure the address of the chunk is returned. */
+    if(!H5F_addr_defined(udata.chunk_block.offset))
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "chunk address isn't defined")
+
+    /* Read the chunk data into the supplied buffer */
+    if(H5F_block_read(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, udata.chunk_block.length, buf) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "unable to read raw data chunk")
+    
+    /* Return the filter mask */
+    *filters = udata.filter_mask;
+
+done:
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
+} /* end H5D__chunk_direct_read() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5D__get_chunk_storage_size
+ *
+ * Purpose:     Internal routine to read the storage size of a chunk on disk.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Matthew Strong (GE Healthcare)
+ *              20 October 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5D__get_chunk_storage_size(H5D_t *dset, const hsize_t *offset, hsize_t *storage_size)
+{
+    const H5O_layout_t *layout = &(dset->shared->layout);    /* Dataset layout */
+    const H5D_rdcc_t   *rdcc = &(dset->shared->cache.chunk); /* raw data chunk cache */
+    hsize_t scaled[H5S_MAX_RANK];       /* Scaled coordinates for this chunk */
+    H5D_chunk_ud_t     udata;           /* User data for querying chunk info */
+    herr_t             ret_value = SUCCEED;        /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL_TAG(dset->oloc.addr)
+
+    /* Check args */
+    HDassert(dset && H5D_CHUNKED == layout->type);
+    HDassert(offset);
+    HDassert(storage_size);
+
+    *storage_size = 0;
+
+    /* Allocate dataspace and initialize it if it hasn't been. */
+    if(!(*layout->ops->is_space_alloc)(&layout->storage))
+        HGOTO_DONE(SUCCEED)
+
+    /* Calculate the index of this chunk */
+    H5VM_chunk_scaled(dset->shared->ndims, offset, layout->u.chunk.dim, scaled);
+    scaled[dset->shared->ndims] = 0;
+
+    /* Reset fields about the chunk we are looking for */
+    udata.chunk_block.offset = HADDR_UNDEF;
+    udata.chunk_block.length = 0;
+    udata.idx_hint = UINT_MAX;
+
+    /* Find out the file address of the chunk */
+    if(H5D__chunk_lookup(dset, scaled, &udata) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
+
+    /* Sanity check */
+    HDassert((H5F_addr_defined(udata.chunk_block.offset) && udata.chunk_block.length > 0) ||
+            (!H5F_addr_defined(udata.chunk_block.offset) && udata.chunk_block.length == 0));
+
+    /* The requested chunk is not in cache or on disk */
+    if(!H5F_addr_defined(udata.chunk_block.offset) && UINT_MAX == udata.idx_hint)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "chunk storage is not allocated")
+
+    /* Check if there are filters registered to the dataset */
+    if( dset->shared->dcpl_cache.pline.nused > 0 ) {
+        /* Check if the requested chunk exists in the chunk cache */
+        if(UINT_MAX != udata.idx_hint) {
+            H5D_rdcc_ent_t *ent = rdcc->slot[udata.idx_hint];
+
+            /* Sanity checks  */
+            HDassert(udata.idx_hint < rdcc->nslots);
+            HDassert(rdcc->slot[udata.idx_hint]);
+
+            /* If the cached chunk is dirty, it must be flushed to get accurate size */
+            if( ent->dirty == TRUE ) {
+                /* Flush the chunk to disk and clear the cache entry */
+                if(H5D__chunk_cache_evict(dset, rdcc->slot[udata.idx_hint], TRUE) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk")
+
+                /* Reset fields about the chunk we are looking for */
+                udata.chunk_block.offset = HADDR_UNDEF;
+                udata.chunk_block.length = 0;
+                udata.idx_hint = UINT_MAX;
+
+                /* Get the new file address / chunk size after flushing */
+                if(H5D__chunk_lookup(dset, scaled, &udata) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
+            } /* end if */
+        } /* end if */
+
+        /* Make sure the address of the chunk is returned. */
+        if(!H5F_addr_defined(udata.chunk_block.offset))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "chunk address isn't defined")
+
+        /* Return the chunk size on disk */
+        *storage_size = udata.chunk_block.length;
+    }
+    /* There are no filters registered, return the chunk size from the storage layout */
+    else
+        *storage_size = dset->shared->layout.u.chunk.size;
+
+done:
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
+} /* H5D__get_chunk_storage_size */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5D__chunk_set_info_real
  *
  * Purpose:	Internal routine to set the information about chunks for a dataset
@@ -521,22 +696,22 @@ H5D__chunk_set_info_real(H5O_layout_chunk_t *layout, unsigned ndims,
     /* Compute the # of chunks in dataset dimensions */
     for(u = 0, layout->nchunks = 1, layout->max_nchunks = 1; u < ndims; u++) {
         /* Round up to the next integer # of chunks, to accomodate partial chunks */
-	layout->chunks[u] = ((curr_dims[u] + layout->dim[u]) - 1) / layout->dim[u];
+        layout->chunks[u] = ((curr_dims[u] + layout->dim[u]) - 1) / layout->dim[u];
         if(H5S_UNLIMITED == max_dims[u])
             layout->max_chunks[u] = H5S_UNLIMITED;
         else
             layout->max_chunks[u] = ((max_dims[u] + layout->dim[u]) - 1) / layout->dim[u];
 
         /* Accumulate the # of chunks */
-	layout->nchunks *= layout->chunks[u];
-	layout->max_nchunks *= layout->max_chunks[u];
+        layout->nchunks *= layout->chunks[u];
+        layout->max_nchunks *= layout->max_chunks[u];
     } /* end for */
 
     /* Get the "down" sizes for each dimension */
     if(H5VM_array_down(ndims, layout->chunks, layout->down_chunks) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't compute 'down' chunk size value")
     if(H5VM_array_down(ndims, layout->max_chunks, layout->max_down_chunks) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't compute 'down' chunk size value")
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't compute 'down' chunk size value")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -718,7 +893,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__chunk_init(H5F_t *f, hid_t dxpl_id, const H5D_t *dset, hid_t dapl_id)
+H5D__chunk_init(H5F_t *f, const H5D_t *dset, hid_t dapl_id)
 {
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
     H5D_rdcc_t	*rdcc = &(dset->shared->cache.chunk);   /* Convenience pointer to dataset's chunk cache */
@@ -769,11 +944,16 @@ H5D__chunk_init(H5F_t *f, hid_t dxpl_id, const H5D_t *dset, hid_t dapl_id)
         unsigned u;                         /* Local index value */
 
         for(u = 0; u < dset->shared->ndims; u++) {
+            hsize_t scaled_power2up;    /* Scaled value, rounded to next power of 2 */
+
             /* Initial scaled dimension sizes */
             rdcc->scaled_dims[u] = dset->shared->curr_dims[u] / dset->shared->layout.u.chunk.dim[u];
 
+            if( !(scaled_power2up = H5VM_power2up(rdcc->scaled_dims[u])) )
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get the next power of 2")
+
             /* Inital 'power2up' values for scaled dimensions */
-            rdcc->scaled_power2up[u] = H5VM_power2up(rdcc->scaled_dims[u]);
+            rdcc->scaled_power2up[u] = scaled_power2up;
 
             /* Number of bits required to encode scaled dimension size */
             rdcc->scaled_encode_bits[u] = H5VM_log2_gen(rdcc->scaled_power2up[u]);
@@ -782,7 +962,6 @@ H5D__chunk_init(H5F_t *f, hid_t dxpl_id, const H5D_t *dset, hid_t dapl_id)
 
     /* Compose chunked index info struct */
     idx_info.f = f;
-    idx_info.dxpl_id = dxpl_id;
     idx_info.pline = &dset->shared->dcpl_cache.pline;
     idx_info.layout = &dset->shared->layout.u.chunk;
     idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -1117,7 +1296,7 @@ done:
 
     if(iter_init && H5S_SELECT_ITER_RELEASE(&(fm->mem_iter)) < 0)
         HDONE_ERROR(H5E_DATASPACE, H5E_CANTRELEASE, FAIL, "unable to release selection iterator")
-    if(file_type && (H5T_close(file_type) < 0))
+    if(file_type && (H5T_close_real(file_type) < 0))
         HDONE_ERROR(H5E_DATATYPE, H5E_CANTFREE, FAIL, "Can't free temporary datatype")
     if(file_space_normalized == TRUE) {
         /* (Casting away const OK -QAK) */
@@ -2016,7 +2195,7 @@ H5D__chunk_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
         chunk_info = H5D_CHUNK_GET_NODE_INFO(fm, chunk_node);
 
         /* Get the info for the chunk in the file */
-        if(H5D__chunk_lookup(io_info->dset, io_info->md_dxpl_id, chunk_info->scaled, &udata) < 0)
+        if(H5D__chunk_lookup(io_info->dset, chunk_info->scaled, &udata) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
 
         /* Sanity check */
@@ -2030,8 +2209,8 @@ H5D__chunk_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
             void *chunk = NULL;             /* Pointer to locked chunk buffer */
             htri_t cacheable;               /* Whether the chunk is cacheable */
 
-	    /* Set chunk's [scaled] coordinates */
-	    io_info->store->chunk.scaled = chunk_info->scaled;
+            /* Set chunk's [scaled] coordinates */
+            io_info->store->chunk.scaled = chunk_info->scaled;
 
             /* Determine if we should use the chunk cache */
             if((cacheable = H5D__chunk_cacheable(io_info, udata.chunk_block.offset, FALSE)) < 0)
@@ -2149,7 +2328,7 @@ H5D__chunk_write(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
         chunk_info = H5D_CHUNK_GET_NODE_INFO(fm, chunk_node);
 
         /* Look up the chunk */
-        if(H5D__chunk_lookup(io_info->dset, io_info->md_dxpl_id, chunk_info->scaled, &udata) < 0)
+        if(H5D__chunk_lookup(io_info->dset, chunk_info->scaled, &udata) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
 
         /* Sanity check */
@@ -2192,7 +2371,6 @@ H5D__chunk_write(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
             if(!H5F_addr_defined(udata.chunk_block.offset)) {
                 /* Compose chunked index info struct */
                 idx_info.f = io_info->dset->oloc.file;
-                idx_info.dxpl_id = io_info->md_dxpl_id;
                 idx_info.pline = &(io_info->dset->shared->dcpl_cache.pline);
                 idx_info.layout = &(io_info->dset->shared->layout.u.chunk);
                 idx_info.storage = &(io_info->dset->shared->layout.storage.u.chunk);
@@ -2261,10 +2439,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__chunk_flush(H5D_t *dset, hid_t dxpl_id)
+H5D__chunk_flush(H5D_t *dset)
 {
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     H5D_rdcc_t *rdcc = &(dset->shared->cache.chunk);
     H5D_rdcc_ent_t	*ent, *next;
     unsigned		nerrors = 0;    /* Count of any errors encountered when flushing chunks */
@@ -2275,14 +2451,10 @@ H5D__chunk_flush(H5D_t *dset, hid_t dxpl_id)
     /* Sanity check */
     HDassert(dset);
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Loop over all entries in the chunk cache */
     for(ent = rdcc->head; ent; ent = next) {
 	next = ent->next;
-        if(H5D__chunk_flush_entry(dset, dxpl_id, dxpl_cache, ent, FALSE) < 0)
+        if(H5D__chunk_flush_entry(dset, ent, FALSE) < 0)
             nerrors++;
     } /* end for */
     if(nerrors)
@@ -2358,37 +2530,31 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__chunk_dest(H5D_t *dset, hid_t dxpl_id)
+H5D__chunk_dest(H5D_t *dset)
 {
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     H5D_rdcc_t	*rdcc = &(dset->shared->cache.chunk);   /* Dataset's chunk cache */
     H5D_rdcc_ent_t	*ent = NULL, *next = NULL;      /* Pointer to current & next cache entries */
     int		nerrors = 0;            /* Accumulated count of errors */
     H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
     herr_t      ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, dset->oloc.addr, FAIL)
+    FUNC_ENTER_STATIC_TAG(dset->oloc.addr)
 
     /* Sanity checks */
     HDassert(dset);
     H5D_CHUNK_STORAGE_INDEX_CHK(sc);
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        nerrors++;
-
     /* Flush all the cached chunks */
     for(ent = rdcc->head; ent; ent = next) {
-	next = ent->next;
-	if(H5D__chunk_cache_evict(dset, dxpl_id, dxpl_cache, ent, TRUE) < 0)
-	    nerrors++;
+        next = ent->next;
+        if(H5D__chunk_cache_evict(dset, ent, TRUE) < 0)
+            nerrors++;
     } /* end for */
     
     /* Continue even if there are failures. */
     if(nerrors)
-	HDONE_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "unable to flush one or more raw data chunks")
+        HDONE_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "unable to flush one or more raw data chunks")
 
     /* Release cache structures */
     if(rdcc->slot)
@@ -2397,7 +2563,6 @@ H5D__chunk_dest(H5D_t *dset, hid_t dxpl_id)
 
     /* Compose chunked index info struct */
     idx_info.f = dset->oloc.file;
-    idx_info.dxpl_id = dxpl_id;
     idx_info.pline = &dset->shared->dcpl_cache.pline;
     idx_info.layout = &dset->shared->layout.u.chunk;
     idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -2408,7 +2573,7 @@ H5D__chunk_dest(H5D_t *dset, hid_t dxpl_id)
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to release chunk index info")
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__chunk_dest() */
 
 
@@ -2546,7 +2711,7 @@ H5D__chunk_cinfo_cache_found(const H5D_chunk_cached_t *last, H5D_chunk_ud_t *uda
         /* Retrieve the information from the cache */
         udata->chunk_block.offset = last->addr;
         udata->chunk_block.length = last->nbytes;
-	udata->chunk_idx = last->chunk_idx;
+        udata->chunk_idx = last->chunk_idx;
         udata->filter_mask = last->filter_mask;
 
         /* Indicate that the data was found */
@@ -2574,7 +2739,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_create(const H5D_t *dset /*in,out*/, hid_t dxpl_id)
+H5D__chunk_create(const H5D_t *dset /*in,out*/)
 {
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
     H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
@@ -2599,7 +2764,6 @@ H5D__chunk_create(const H5D_t *dset /*in,out*/, hid_t dxpl_id)
 
     /* Compose chunked index info struct */
     idx_info.f = dset->oloc.file;
-    idx_info.dxpl_id = dxpl_id;
     idx_info.pline = &dset->shared->dcpl_cache.pline;
     idx_info.layout = &dset->shared->layout.u.chunk;
     idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -2674,7 +2838,7 @@ H5D__chunk_hash_val(const H5D_shared_t *shared, const hsize_t *scaled)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_lookup(const H5D_t *dset, hid_t dxpl_id, const hsize_t *scaled,
+H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled,
     H5D_chunk_ud_t *udata)
 {
     H5D_rdcc_ent_t  *ent = NULL;        /* Cache entry */
@@ -2706,7 +2870,7 @@ H5D__chunk_lookup(const H5D_t *dset, hid_t dxpl_id, const hsize_t *scaled,
     /* Check for chunk in cache */
     if(dset->shared->cache.chunk.nslots > 0) {
         /* Determine the chunk's location in the hash table */
-	idx = H5D__chunk_hash_val(dset->shared, scaled);
+        idx = H5D__chunk_hash_val(dset->shared, scaled);
 
         /* Get the chunk cache entry for that location */
         ent = dset->shared->cache.chunk.slot[idx];
@@ -2730,7 +2894,7 @@ H5D__chunk_lookup(const H5D_t *dset, hid_t dxpl_id, const hsize_t *scaled,
         udata->idx_hint = idx;
         udata->chunk_block.offset = ent->chunk_block.offset;
         udata->chunk_block.length = ent->chunk_block.length;;
-	udata->chunk_idx = ent->chunk_idx;
+        udata->chunk_idx = ent->chunk_idx;
     } /* end if */
     else {
         /* Invalidate idx_hint, to signal that the chunk is not in cache */
@@ -2745,7 +2909,6 @@ H5D__chunk_lookup(const H5D_t *dset, hid_t dxpl_id, const hsize_t *scaled,
 
             /* Compose chunked index info struct */
             idx_info.f = dset->oloc.file;
-            idx_info.dxpl_id = dxpl_id;
             idx_info.pline = &dset->shared->dcpl_cache.pline;
             idx_info.layout = &dset->shared->layout.u.chunk;
             idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -2796,44 +2959,50 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t *dxpl_cache,
-    H5D_rdcc_ent_t *ent, hbool_t reset)
+H5D__chunk_flush_entry(const H5D_t *dset, H5D_rdcc_ent_t *ent, hbool_t reset)
 {
     void	*buf = NULL;	        /* Temporary buffer		*/
     hbool_t	point_of_no_return = FALSE;
     H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
     herr_t	ret_value = SUCCEED;	/* Return value			*/
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, dset->oloc.addr, FAIL)
+    FUNC_ENTER_STATIC_TAG(dset->oloc.addr)
 
     HDassert(dset);
     HDassert(dset->shared);
     H5D_CHUNK_STORAGE_INDEX_CHK(sc);
-    HDassert(dxpl_cache);
     HDassert(ent);
     HDassert(!ent->locked);
 
     buf = ent->chunk;
     if(ent->dirty) {
-	H5D_chk_idx_info_t idx_info;    /* Chunked index info */
+        H5D_chk_idx_info_t idx_info;    /* Chunked index info */
         H5D_chunk_ud_t 	udata;		/* pass through B-tree		*/
         hbool_t must_alloc = FALSE;     /* Whether the chunk must be allocated */
-	hbool_t need_insert = FALSE;    /* Whether the chunk needs to be inserted into the index */
+        hbool_t need_insert = FALSE;    /* Whether the chunk needs to be inserted into the index */
 
         /* Set up user data for index callbacks */
         udata.common.layout = &dset->shared->layout.u.chunk;
         udata.common.storage = &dset->shared->layout.storage.u.chunk;
-	udata.common.scaled = ent->scaled;
+        udata.common.scaled = ent->scaled;
         udata.chunk_block.offset = ent->chunk_block.offset;
         udata.chunk_block.length = dset->shared->layout.u.chunk.size;
         udata.filter_mask = 0;
-	udata.chunk_idx = ent->chunk_idx;
+        udata.chunk_idx = ent->chunk_idx;
 
         /* Should the chunk be filtered before writing it to disk? */
         if(dset->shared->dcpl_cache.pline.nused
                 && !(ent->edge_chunk_state & H5D_RDCC_DISABLE_FILTERS)) {
+            H5Z_EDC_t err_detect;       /* Error detection info */
+            H5Z_cb_t filter_cb;         /* I/O filter callback function */
             size_t alloc = udata.chunk_block.length;        /* Bytes allocated for BUF	*/
-            size_t nbytes;                      /* Chunk size (in bytes) */
+            size_t nbytes;              /* Chunk size (in bytes) */
+
+            /* Retrieve filter settings from API context */
+            if(H5CX_get_err_detect(&err_detect) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get error detection info")
+            if(H5CX_get_filter_cb(&filter_cb) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get I/O filter callback function")
 
             if(!reset) {
                 /*
@@ -2857,9 +3026,9 @@ H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
                 ent->chunk = NULL;
             } /* end else */
             H5_CHECKED_ASSIGN(nbytes, size_t, udata.chunk_block.length, hsize_t);
-            if(H5Z_pipeline(&(dset->shared->dcpl_cache.pline), 0, &(udata.filter_mask), dxpl_cache->err_detect,
-                     dxpl_cache->filter_cb, &nbytes, &alloc, &buf) < 0)
-                HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "output pipeline failed")
+            if(H5Z_pipeline(&(dset->shared->dcpl_cache.pline), 0, &(udata.filter_mask),
+                    err_detect, filter_cb, &nbytes, &alloc, &buf) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTFILTER, FAIL, "output pipeline failed")
 #if H5_SIZEOF_SIZE_T > 4
             /* Check for the chunk expanding too much to encode in a 32-bit value */
             if(nbytes > ((size_t)0xffffffff))
@@ -2897,7 +3066,6 @@ H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
         if(must_alloc) {
             /* Compose chunked index info struct */
             idx_info.f = dset->oloc.file;
-            idx_info.dxpl_id = dxpl_id;
             idx_info.pline = &dset->shared->dcpl_cache.pline;
             idx_info.layout = &dset->shared->layout.u.chunk;
             idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -2905,8 +3073,8 @@ H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
             /* Create the chunk it if it doesn't exist, or reallocate the chunk
              *  if its size changed.
              */
-	    if(H5D__chunk_file_alloc(&idx_info, &(ent->chunk_block), &udata.chunk_block, &need_insert, ent->scaled) < 0)
-		HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert/resize chunk on chunk level")
+            if(H5D__chunk_file_alloc(&idx_info, &(ent->chunk_block), &udata.chunk_block, &need_insert, ent->scaled) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert/resize chunk on chunk level")
 
             /* Update the chunk entry's info, in case it was allocated or relocated */
             ent->chunk_block.offset = udata.chunk_block.offset;
@@ -2916,11 +3084,11 @@ H5D__chunk_flush_entry(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
         /* Write the data to the file */
         HDassert(H5F_addr_defined(udata.chunk_block.offset));
         H5_CHECK_OVERFLOW(udata.chunk_block.length, hsize_t, size_t);
-        if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, (size_t)udata.chunk_block.length, H5AC_rawdata_dxpl_id, buf) < 0)
+        if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, (size_t)udata.chunk_block.length, buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to write raw data to file")
 
         /* Insert the chunk record into the index */
-	if(need_insert && dset->shared->layout.storage.u.chunk.ops->insert)
+        if(need_insert && dset->shared->layout.storage.u.chunk.ops->insert)
             if((dset->shared->layout.storage.u.chunk.ops->insert)(&idx_info, &udata, dset) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert chunk addr into index")
 
@@ -2962,7 +3130,7 @@ done:
                     ((ent->edge_chunk_state & H5D_RDCC_DISABLE_FILTERS) ? NULL
                     : &(dset->shared->dcpl_cache.pline)));
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__chunk_flush_entry() */
 
 
@@ -2980,42 +3148,42 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__chunk_cache_evict(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t *dxpl_cache,
-    H5D_rdcc_ent_t *ent, hbool_t flush)
+H5D__chunk_cache_evict(const H5D_t *dset, H5D_rdcc_ent_t *ent,
+    hbool_t flush)
 {
     H5D_rdcc_t *rdcc = &(dset->shared->cache.chunk);
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_STATIC
 
+    /* Sanity checks */
     HDassert(dset);
-    HDassert(dxpl_cache);
     HDassert(ent);
     HDassert(!ent->locked);
     HDassert(ent->idx < rdcc->nslots);
 
     if(flush) {
-	/* Flush */
-	if(H5D__chunk_flush_entry(dset, dxpl_id, dxpl_cache, ent, TRUE) < 0)
-	    HDONE_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "cannot flush indexed storage buffer")
+        /* Flush */
+        if(H5D__chunk_flush_entry(dset, ent, TRUE) < 0)
+            HDONE_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "cannot flush indexed storage buffer")
     } /* end if */
     else {
         /* Don't flush, just free chunk */
-	if(ent->chunk != NULL)
-	    ent->chunk = (uint8_t *)H5D__chunk_mem_xfree(ent->chunk,
+        if(ent->chunk != NULL)
+            ent->chunk = (uint8_t *)H5D__chunk_mem_xfree(ent->chunk,
                     ((ent->edge_chunk_state & H5D_RDCC_DISABLE_FILTERS) ? NULL
                     : &(dset->shared->dcpl_cache.pline)));
     } /* end else */
 
     /* Unlink from list */
     if(ent->prev)
-	ent->prev->next = ent->next;
+        ent->prev->next = ent->next;
     else
-	rdcc->head = ent->next;
+        rdcc->head = ent->next;
     if(ent->next)
-	ent->next->prev = ent->prev;
+        ent->next->prev = ent->prev;
     else
-	rdcc->tail = ent->prev;
+        rdcc->tail = ent->prev;
     ent->prev = ent->next = NULL;
 
     /* Unlink from temporary list */
@@ -3061,8 +3229,7 @@ H5D__chunk_cache_evict(const H5D_t *dset, hid_t dxpl_id, const H5D_dxpl_cache_t
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__chunk_cache_prune(const H5D_t *dset, hid_t dxpl_id,
-    const H5D_dxpl_cache_t *dxpl_cache, size_t size)
+H5D__chunk_cache_prune(const H5D_t *dset, size_t size)
 {
     const H5D_rdcc_t	*rdcc = &(dset->shared->cache.chunk);
     size_t		total = rdcc->nbytes_max;
@@ -3134,7 +3301,7 @@ H5D__chunk_cache_prune(const H5D_t *dset, hid_t dxpl_id,
 		    if(n[j] == cur)
                         n[j] = cur->next;
 		} /* end for */
-		if(H5D__chunk_cache_evict(dset, dxpl_id, dxpl_cache, cur, TRUE) < 0)
+		if(H5D__chunk_cache_evict(dset, cur, TRUE) < 0)
                     nerrors++;
 	    } /* end if */
 	} /* end for */
@@ -3201,13 +3368,11 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
 
     FUNC_ENTER_STATIC
 
+    /* Sanity checks */
     HDassert(io_info);
-    HDassert(io_info->dxpl_cache);
     HDassert(io_info->store);
     HDassert(udata);
     HDassert(dset);
-    HDassert(TRUE == H5P_isa_class(io_info->md_dxpl_id, H5P_DATASET_XFER));
-    HDassert(TRUE == H5P_isa_class(io_info->raw_dxpl_id, H5P_DATASET_XFER));
     HDassert(!(udata->new_unfilt_chunk && prev_unfilt_chunk));
     HDassert(!rdcc->tmp_head);
 
@@ -3391,16 +3556,22 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
                  * size in memory, so allocate memory big enough. */
                 if(NULL == (chunk = H5D__chunk_mem_alloc(my_chunk_alloc, (udata->new_unfilt_chunk ? old_pline : pline))))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for raw data chunk")
-                if(H5F_block_read(dset->oloc.file, H5FD_MEM_DRAW, chunk_addr, my_chunk_alloc, io_info->raw_dxpl_id, chunk) < 0)
+                if(H5F_block_read(dset->oloc.file, H5FD_MEM_DRAW, chunk_addr, my_chunk_alloc, chunk) < 0)
                     HGOTO_ERROR(H5E_IO, H5E_READERROR, NULL, "unable to read raw data chunk")
 
-		if(old_pline && old_pline->nused) {
-                    if(H5Z_pipeline(old_pline, H5Z_FLAG_REVERSE,
-                            &(udata->filter_mask),
-                            io_info->dxpl_cache->err_detect,
-                            io_info->dxpl_cache->filter_cb,
-                            &my_chunk_alloc, &buf_alloc, &chunk) < 0)
-                        HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, NULL, "data pipeline read failed")
+                if(old_pline && old_pline->nused) {
+                    H5Z_EDC_t err_detect;       /* Error detection info */
+                    H5Z_cb_t filter_cb;         /* I/O filter callback function */
+
+                    /* Retrieve filter settings from API context */
+                    if(H5CX_get_err_detect(&err_detect) < 0)
+                        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, NULL, "can't get error detection info")
+                    if(H5CX_get_filter_cb(&filter_cb) < 0)
+                        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, NULL, "can't get I/O filter callback function")
+
+                    if(H5Z_pipeline(old_pline, H5Z_FLAG_REVERSE, &(udata->filter_mask),
+                            err_detect, filter_cb, &my_chunk_alloc, &buf_alloc, &chunk) < 0)
+                        HGOTO_ERROR(H5E_DATASET, H5E_CANTFILTER, NULL, "data pipeline read failed")
 
                     /* Reallocate chunk if necessary */
                     if(udata->new_unfilt_chunk) {
@@ -3445,14 +3616,14 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
                     /* (use the compact dataset storage buffer as the fill value buffer) */
                     if(H5D__fill_init(&fb_info, chunk, NULL, NULL, NULL, NULL,
                             &dset->shared->dcpl_cache.fill, dset->shared->type,
-                            dset->shared->type_id, (size_t)0, chunk_size, io_info->md_dxpl_id) < 0)
+                            dset->shared->type_id, (size_t)0, chunk_size) < 0)
                         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "can't initialize fill buffer info")
                     fb_info_init = TRUE;
 
                     /* Check for VL datatype & non-default fill value */
                     if(fb_info.has_vlen_fill_type)
                         /* Fill the buffer with VL datatype fill values */
-                        if(H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf, io_info->md_dxpl_id) < 0)
+                        if(H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, NULL, "can't refill fill value buffer")
                 } /* end if */
                 else
@@ -3473,24 +3644,24 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
             if(!ent || !ent->locked) {
                 /* Preempt enough things from the cache to make room */
                 if(ent) {
-                    if(H5D__chunk_cache_evict(io_info->dset, io_info->md_dxpl_id, io_info->dxpl_cache, ent, TRUE) < 0)
+                    if(H5D__chunk_cache_evict(io_info->dset, ent, TRUE) < 0)
                         HGOTO_ERROR(H5E_IO, H5E_CANTINIT, NULL, "unable to preempt chunk from cache")
                 } /* end if */
-                if(H5D__chunk_cache_prune(io_info->dset, io_info->md_dxpl_id, io_info->dxpl_cache, chunk_size) < 0)
+                if(H5D__chunk_cache_prune(io_info->dset, chunk_size) < 0)
                     HGOTO_ERROR(H5E_IO, H5E_CANTINIT, NULL, "unable to preempt chunk(s) from cache")
 
                 /* Create a new entry */
                 if(NULL == (ent = H5FL_CALLOC(H5D_rdcc_ent_t)))
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, NULL, "can't allocate raw data chunk entry")
 
-		ent->edge_chunk_state = disable_filters ? H5D_RDCC_DISABLE_FILTERS : 0;
-		if(udata->new_unfilt_chunk)
-		    ent->edge_chunk_state |= H5D_RDCC_NEWLY_DISABLED_FILTERS;
+                ent->edge_chunk_state = disable_filters ? H5D_RDCC_DISABLE_FILTERS : 0;
+                if(udata->new_unfilt_chunk)
+                    ent->edge_chunk_state |= H5D_RDCC_NEWLY_DISABLED_FILTERS;
 
                 /* Initialize the new entry */
                 ent->chunk_block.offset = chunk_addr;
                 ent->chunk_block.length = chunk_alloc;
-		ent->chunk_idx = udata->chunk_idx;
+                ent->chunk_idx = udata->chunk_idx;
                 HDmemcpy(ent->scaled, udata->common.scaled, sizeof(hsize_t) * layout->u.chunk.ndims);
                 H5_CHECKED_ASSIGN(ent->rd_count, uint32_t, chunk_size, size_t);
                 H5_CHECKED_ASSIGN(ent->wr_count, uint32_t, chunk_size, size_t);
@@ -3511,8 +3682,8 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
                 } /* end if */
                 else
                     rdcc->head = rdcc->tail = ent;
-		ent->tmp_next = NULL;
-		ent->tmp_prev = NULL;
+                ent->tmp_next = NULL;
+                ent->tmp_prev = NULL;
 
             } /* end if */
             else
@@ -3626,7 +3797,7 @@ H5D__chunk_unlock(const H5D_io_info_t *io_info, const H5D_chunk_ud_t *udata,
             fake_ent.chunk_block.length = udata->chunk_block.length;
             fake_ent.chunk = (uint8_t *)chunk;
 
-            if(H5D__chunk_flush_entry(io_info->dset, io_info->md_dxpl_id, io_info->dxpl_cache, &fake_ent, TRUE) < 0)
+            if(H5D__chunk_flush_entry(io_info->dset, &fake_ent, TRUE) < 0)
                 HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "cannot flush indexed storage buffer")
         } /* end if */
         else {
@@ -3703,13 +3874,11 @@ H5D__chunk_allocated_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_allocated(H5D_t *dset, hid_t dxpl_id, hsize_t *nbytes)
+H5D__chunk_allocated(const H5D_t *dset, hsize_t *nbytes)
 {
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
     const H5D_rdcc_t   *rdcc = &(dset->shared->cache.chunk);	/* Raw data chunk cache */
     H5D_rdcc_ent_t     *ent;            /* Cache entry  */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     hsize_t chunk_bytes = 0;            /* Number of bytes allocated for chunks */
     H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -3720,20 +3889,14 @@ H5D__chunk_allocated(H5D_t *dset, hid_t dxpl_id, hsize_t *nbytes)
     HDassert(dset->shared);
     H5D_CHUNK_STORAGE_INDEX_CHK(sc);
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Search for cached chunks that haven't been written out */
-    for(ent = rdcc->head; ent; ent = ent->next) {
+    for(ent = rdcc->head; ent; ent = ent->next)
         /* Flush the chunk out to disk, to make certain the size is correct later */
-        if(H5D__chunk_flush_entry(dset, dxpl_id, dxpl_cache, ent, FALSE) < 0)
+        if(H5D__chunk_flush_entry(dset, ent, FALSE) < 0)
             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "cannot flush indexed storage buffer")
-    } /* end for */
 
     /* Compose chunked index info struct */
     idx_info.f = dset->oloc.file;
-    idx_info.dxpl_id = dxpl_id;
     idx_info.pline = &dset->shared->dcpl_cache.pline;
     idx_info.layout = &dset->shared->layout.u.chunk;
     idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -3784,15 +3947,11 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
     hbool_t     should_fill = FALSE; /* Whether fill values should be written */
     void        *unfilt_fill_buf = NULL; /* Unfiltered fill value buffer */
     void        **fill_buf = NULL;      /* Pointer to the fill buffer to use for a chunk */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
 #ifdef H5_HAVE_PARALLEL
     hbool_t     blocks_written = FALSE; /* Flag to indicate that chunk was actually written */
     hbool_t     using_mpi = FALSE;    /* Flag to indicate that the file is being accessed with an MPI-capable file driver */
     H5D_chunk_coll_info_t chunk_info; /* chunk address information for doing I/O */
 #endif /* H5_HAVE_PARALLEL */
-    hid_t       md_dxpl_id = io_info->md_dxpl_id;
-    hid_t       raw_dxpl_id = io_info->raw_dxpl_id;
     hbool_t	carry;          /* Flag to indicate that chunk increment carrys to higher dimension (sorta) */
     unsigned    space_ndims;    /* Dataset's space rank */
     const hsize_t *space_dim;   /* Dataset's dataspace dimensions */
@@ -3807,14 +3966,12 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
     const H5O_storage_chunk_t *sc = &(layout->storage.u.chunk);
     herr_t	ret_value = SUCCEED;	/* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(md_dxpl_id, dset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(dset->oloc.addr)
 
     /* Check args */
     HDassert(dset && H5D_CHUNKED == layout->type);
     HDassert(layout->u.chunk.ndims > 0 && layout->u.chunk.ndims <= H5O_LAYOUT_NDIMS);
     H5D_CHUNK_STORAGE_INDEX_CHK(sc);
-    HDassert(TRUE == H5P_isa_class(md_dxpl_id, H5P_DATASET_XFER));
-    HDassert(TRUE == H5P_isa_class(raw_dxpl_id, H5P_DATASET_XFER));
 
     /* Retrieve the dataset dimensions */
     space_dim = dset->shared->curr_dims;
@@ -3844,10 +4001,6 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
     } /* end if */
 #endif  /* H5_HAVE_PARALLEL */
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(raw_dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Calculate the minimum and maximum chunk offsets in each dimension, and
      * determine if there are any unfiltered partial edge chunks.  Note that we
      * assume here that all elements of space_dim are > 0.  This is checked at
@@ -3898,7 +4051,7 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
         if(H5D__fill_init(&fb_info, NULL, (H5MM_allocate_t)H5D__chunk_mem_alloc,
                 (void *)pline, (H5MM_free_t)H5D__chunk_mem_xfree, (void *)pline,
                 &dset->shared->dcpl_cache.fill, dset->shared->type,
-                dset->shared->type_id, (size_t)0, orig_chunk_size, md_dxpl_id) < 0)
+                dset->shared->type_id, (size_t)0, orig_chunk_size) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize fill buffer info")
         fb_info_init = TRUE;
 
@@ -3912,6 +4065,8 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
          *      it doesn't contain any non-default VL datatype fill values)
          */
         if(!fb_info.has_vlen_fill_type && pline->nused > 0) {
+            H5Z_EDC_t err_detect;               /* Error detection info */
+            H5Z_cb_t filter_cb;                 /* I/O filter callback function */
             size_t buf_size = orig_chunk_size;
 
             /* If the dataset has disabled partial chunk filters, create a copy
@@ -3922,8 +4077,14 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
                 HDmemcpy(unfilt_fill_buf, fb_info.fill_buf, orig_chunk_size);
             } /* end if */
 
+            /* Retrieve filter settings from API context */
+            if(H5CX_get_err_detect(&err_detect) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get error detection info")
+            if(H5CX_get_filter_cb(&filter_cb) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get I/O filter callback function")
+
             /* Push the chunk through the filters */
-            if(H5Z_pipeline(pline, 0, &filter_mask, dxpl_cache->err_detect, dxpl_cache->filter_cb, &orig_chunk_size, &buf_size, &fb_info.fill_buf) < 0)
+            if(H5Z_pipeline(pline, 0, &filter_mask, err_detect, filter_cb, &orig_chunk_size, &buf_size, &fb_info.fill_buf) < 0)
                 HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "output pipeline failed")
 #if H5_SIZEOF_SIZE_T > 4
             /* Check for the chunk expanding too much to encode in a 32-bit value */
@@ -3935,7 +4096,6 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
 
     /* Compose chunked index info struct */
     idx_info.f = dset->oloc.file;
-    idx_info.dxpl_id = md_dxpl_id;
     idx_info.pline = &dset->shared->dcpl_cache.pline;
     idx_info.layout = &dset->shared->layout.u.chunk;
     idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -4005,7 +4165,7 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
             hbool_t need_insert = FALSE;    /* Whether the chunk needs to be inserted into the index */
 
 	    /* Look up this chunk */
-	    if(H5D__chunk_lookup(dset, md_dxpl_id, scaled, &udata) < 0)
+	    if(H5D__chunk_lookup(dset, scaled, &udata) < 0)
 		HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
 #ifndef NDEBUG
             /* None of the chunks should be allocated */
@@ -4046,15 +4206,23 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
                 } /* end if */
 
                 /* Fill the buffer with VL datatype fill values */
-                if(H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf, md_dxpl_id) < 0)
+                if(H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "can't refill fill value buffer")
 
                 /* Check if there are filters which need to be applied to the chunk */
                 if((pline->nused > 0) && !nunfilt_edge_chunk_dims) {
+                    H5Z_EDC_t err_detect;       /* Error detection info */
+                    H5Z_cb_t filter_cb;         /* I/O filter callback function */
                     size_t nbytes = orig_chunk_size;
 
+                    /* Retrieve filter settings from API context */
+                    if(H5CX_get_err_detect(&err_detect) < 0)
+                        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get error detection info")
+                    if(H5CX_get_filter_cb(&filter_cb) < 0)
+                        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get I/O filter callback function")
+
                     /* Push the chunk through the filters */
-                    if(H5Z_pipeline(pline, 0, &filter_mask, dxpl_cache->err_detect, dxpl_cache->filter_cb, &nbytes, &fb_info.fill_buf_size, &fb_info.fill_buf) < 0)
+                    if(H5Z_pipeline(pline, 0, &filter_mask, err_detect, filter_cb, &nbytes, &fb_info.fill_buf_size, &fb_info.fill_buf) < 0)
                         HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "output pipeline failed")
 
 #if H5_SIZEOF_SIZE_T > 4
@@ -4113,7 +4281,7 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
                 } /* end if */
                 else {
 #endif /* H5_HAVE_PARALLEL */
-                    if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, chunk_size, raw_dxpl_id, *fill_buf) < 0)
+                    if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, udata.chunk_block.offset, chunk_size, *fill_buf) < 0)
                         HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write raw data to file")
 #ifdef H5_HAVE_PARALLEL
                 } /* end else */
@@ -4177,7 +4345,7 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
 #ifdef H5_HAVE_PARALLEL
     /* do final collective I/O */
     if(using_mpi && blocks_written)
-        if(H5D__chunk_collective_fill(dset, raw_dxpl_id, &chunk_info, chunk_size, fb_info.fill_buf) < 0)
+        if(H5D__chunk_collective_fill(dset, &chunk_info, chunk_size, fb_info.fill_buf) < 0)
             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write raw data to file")
 #endif /* H5_HAVE_PARALLEL */
 
@@ -4197,7 +4365,7 @@ done:
         H5MM_free(chunk_info.addr);
 #endif
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__chunk_allocate() */
 
 
@@ -4218,7 +4386,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_update_old_edge_chunks(H5D_t *dset, hid_t dxpl_id, hsize_t old_dim[])
+H5D__chunk_update_old_edge_chunks(H5D_t *dset, hsize_t old_dim[])
 {
     hsize_t     old_edge_chunk_sc[H5O_LAYOUT_NDIMS]; /* Offset of first previously incomplete chunk in each dimension */
     hsize_t     max_edge_chunk_sc[H5O_LAYOUT_NDIMS]; /* largest offset of chunks that might need to be modified in each dimension */
@@ -4233,8 +4401,6 @@ H5D__chunk_update_old_edge_chunks(H5D_t *dset, hid_t dxpl_id, hsize_t old_dim[])
     H5D_io_info_t chk_io_info;          /* Chunked I/O info object */
     H5D_chunk_ud_t chk_udata;           /* User data for locking chunk */
     H5D_storage_t chk_store;            /* Chunk storage information */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     void        *chunk;                 /* The file chunk  */
     hbool_t     carry;                  /* Flag to indicate that chunk increment carrys to higher dimension (sorta) */
     const H5O_storage_chunk_t *sc = &(layout->storage.u.chunk);
@@ -4246,7 +4412,6 @@ H5D__chunk_update_old_edge_chunks(H5D_t *dset, hid_t dxpl_id, hsize_t old_dim[])
     HDassert(dset && H5D_CHUNKED == layout->type);
     HDassert(layout->u.chunk.ndims > 0 && layout->u.chunk.ndims <= H5O_LAYOUT_NDIMS);
     H5D_CHUNK_STORAGE_INDEX_CHK(sc);
-    HDassert(TRUE == H5P_isa_class(dxpl_id, H5P_DATASET_XFER));
     HDassert(pline->nused > 0);
     HDassert(layout->u.chunk.flags
             & H5O_LAYOUT_CHUNK_DONT_FILTER_PARTIAL_BOUND_CHUNKS);
@@ -4270,15 +4435,12 @@ H5D__chunk_update_old_edge_chunks(H5D_t *dset, hid_t dxpl_id, hsize_t old_dim[])
     /*
      * Initialize structures needed to lock chunks into cache
      */
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
 
     /* Set up chunked I/O info object, for operations on chunks (in callback).
      * Note that we only need to set chunk_offset once, as the array's address
      * will never change. */
     chk_store.chunk.scaled = chunk_sc;
-    H5D_BUILD_IO_INFO_RD(&chk_io_info, dset, dxpl_cache, dxpl_id, H5AC_rawdata_dxpl_id, &chk_store, NULL);
+    H5D_BUILD_IO_INFO_RD(&chk_io_info, dset, &chk_store, NULL);
 
     /*
      * Determine the edges of the dataset which need to be modified
@@ -4331,7 +4493,7 @@ H5D__chunk_update_old_edge_chunks(H5D_t *dset, hid_t dxpl_id, hsize_t old_dim[])
                     && !H5D__chunk_is_partial_edge_chunk(space_ndims, chunk_dim, chunk_sc, space_dim));
 
             /* Lookup the chunk */
-            if(H5D__chunk_lookup(dset, dxpl_id, chunk_sc, &chk_udata) < 0)
+            if(H5D__chunk_lookup(dset, chunk_sc, &chk_udata) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
 
             /* If this chunk does not exist in cache or on disk, no need to do
@@ -4396,8 +4558,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__chunk_collective_fill(const H5D_t *dset, hid_t dxpl_id,
-    H5D_chunk_coll_info_t *chunk_info, size_t chunk_size, const void *fill_buf)
+H5D__chunk_collective_fill(const H5D_t *dset, H5D_chunk_coll_info_t *chunk_info,
+    size_t chunk_size, const void *fill_buf)
 {
     MPI_Comm	mpi_comm = MPI_COMM_NULL;	/* MPI communicator for file */
     int         mpi_rank = (-1);    /* This process's rank  */
@@ -4409,7 +4571,8 @@ H5D__chunk_collective_fill(const H5D_t *dset, hid_t dxpl_id,
     MPI_Aint    *chunk_disp_array = NULL;
     int         *block_lens = NULL;
     MPI_Datatype mem_type, file_type;
-    hid_t       data_dxpl_id = -1;  /* DXPL ID to use for raw data I/O operations */
+    H5FD_mpio_xfer_t prev_xfer_mode;    /* Previous data xfer mode */
+    hbool_t     have_xfer_mode = FALSE; /* Whether the previous xffer mode has been retrieved */
     int         i;                  /* Local index variable */
     herr_t ret_value = SUCCEED;     /* Return value */
 
@@ -4427,10 +4590,6 @@ H5D__chunk_collective_fill(const H5D_t *dset, hid_t dxpl_id,
     if((mpi_size = H5F_mpi_get_size(dset->oloc.file)) < 0)
         HGOTO_ERROR(H5E_INTERNAL, H5E_MPI, FAIL, "Can't retrieve MPI size")
 
-    /* Get a copy of the DXPL, to modify */
-    if((data_dxpl_id = H5P_copy_plist((H5P_genplist_t *)H5I_object(dxpl_id), TRUE)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "can't copy property list")
-
     /* Distribute evenly the number of blocks between processes. */
     num_blocks = chunk_info->num_io / mpi_size; /* value should be the same on all procs */
 
@@ -4489,29 +4648,23 @@ H5D__chunk_collective_fill(const H5D_t *dset, hid_t dxpl_id,
     if(MPI_SUCCESS != (mpi_code = MPI_Type_commit(&mem_type)))
         HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
 
-    /* set MPI-IO VFD properties */
-    {
-        H5FD_mpio_xfer_t xfer_mode = H5FD_MPIO_COLLECTIVE;
-        H5P_genplist_t  *plist;      /* Property list pointer */
-
-        if(NULL == (plist = H5P_object_verify(data_dxpl_id, H5P_DATASET_XFER)))
-            HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dataset transfer list")
+    /* Set MPI-IO VFD properties */
 
-        /* Set buffer MPI type */
-        if(H5P_set(plist, H5FD_MPI_XFER_MEM_MPI_TYPE_NAME, &mem_type) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set MPI-I/O property")
+    /* Set MPI datatypes for operation */
+    if(H5CX_set_mpi_coll_datatypes(mem_type, file_type) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set MPI-I/O properties")
 
-        /* Set File MPI type */
-        if(H5P_set(plist, H5FD_MPI_XFER_FILE_MPI_TYPE_NAME, &file_type) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set MPI-I/O property")
+    /* Get current transfer mode */
+    if(H5CX_get_io_xfer_mode(&prev_xfer_mode) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set transfer mode")
+    have_xfer_mode = TRUE;
 
-        /* set transfer mode */
-        if(H5P_set(plist, H5D_XFER_IO_XFER_MODE_NAME, &xfer_mode) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set transfer mode")
-    }
+    /* Set transfer mode */
+    if(H5CX_set_io_xfer_mode(H5FD_MPIO_COLLECTIVE) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set transfer mode")
 
-    /* low level write (collective) */
-    if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, (haddr_t)0, (blocks) ? (size_t)1 : (size_t)0, data_dxpl_id, fill_buf) < 0)
+    /* Low-level write (collective) */
+    if(H5F_block_write(dset->oloc.file, H5FD_MEM_DRAW, (haddr_t)0, (blocks) ? (size_t)1 : (size_t)0, fill_buf) < 0)
         HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "unable to write raw data to file")
 
     /* Barrier so processes don't race ahead */
@@ -4519,8 +4672,10 @@ H5D__chunk_collective_fill(const H5D_t *dset, hid_t dxpl_id,
         HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_code)
 
 done:
-    if(data_dxpl_id > 0 && H5I_dec_ref(data_dxpl_id) < 0)
-        HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "Can't free property list")
+    if(have_xfer_mode)
+        /* Set transfer mode */
+        if(H5CX_set_io_xfer_mode(prev_xfer_mode) < 0)
+            HDONE_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set transfer mode")
 
     /* free things */
     if(MPI_SUCCESS != (mpi_code = MPI_Type_free(&file_type)))
@@ -4574,7 +4729,7 @@ H5D__chunk_prune_fill(H5D_chunk_it_ud1_t *udata, hbool_t new_unfilt_chunk)
     H5_CHECKED_ASSIGN(chunk_size, size_t, layout->u.chunk.size, uint32_t);
 
     /* Get the info for the chunk in the file */
-    if(H5D__chunk_lookup(dset, io_info->md_dxpl_id, scaled, &chk_udata) < 0)
+    if(H5D__chunk_lookup(dset, scaled, &chk_udata) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
     chk_udata.new_unfilt_chunk = new_unfilt_chunk;
 
@@ -4588,7 +4743,7 @@ H5D__chunk_prune_fill(H5D_chunk_it_ud1_t *udata, hbool_t new_unfilt_chunk)
         if(H5D__fill_init(&udata->fb_info, NULL, NULL, NULL, NULL, NULL,
                 &dset->shared->dcpl_cache.fill,
                 dset->shared->type, dset->shared->type_id, (size_t)udata->elmts_per_chunk,
-                chunk_size, io_info->md_dxpl_id) < 0)
+                chunk_size) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize fill buffer info")
         udata->fb_info_init = TRUE;
     } /* end if */
@@ -4625,7 +4780,7 @@ H5D__chunk_prune_fill(H5D_chunk_it_ud1_t *udata, hbool_t new_unfilt_chunk)
     /* Check for VL datatype & non-default fill value */
     if(udata->fb_info.has_vlen_fill_type)
         /* Re-fill the buffer to use for this I/O operation */
-        if(H5D__fill_refill_vl(&udata->fb_info, (size_t)sel_nelmts, io_info->md_dxpl_id) < 0)
+        if(H5D__fill_refill_vl(&udata->fb_info, (size_t)sel_nelmts) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "can't refill fill value buffer")
 
     /* Allocate the chunk selection iterator */
@@ -4638,7 +4793,7 @@ H5D__chunk_prune_fill(H5D_chunk_it_ud1_t *udata, hbool_t new_unfilt_chunk)
     chunk_iter_init = TRUE;
 
     /* Scatter the data into memory */
-    if(H5D__scatter_mem(udata->fb_info.fill_buf, udata->chunk_space, chunk_iter, (size_t)sel_nelmts, io_info->dxpl_cache, chunk/*out*/) < 0)
+    if(H5D__scatter_mem(udata->fb_info.fill_buf, udata->chunk_space, chunk_iter, (size_t)sel_nelmts, chunk/*out*/) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "scatter failed")
 
 
@@ -4762,7 +4917,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
+H5D__chunk_prune_by_extent(H5D_t *dset, const hsize_t *old_dim)
 {
     hsize_t                 min_mod_chunk_sc[H5O_LAYOUT_NDIMS]; /* Scaled offset of first chunk to modify in each dimension */
     hsize_t                 max_mod_chunk_sc[H5O_LAYOUT_NDIMS]; /* Scaled offset of last chunk to modify in each dimension */
@@ -4773,8 +4928,6 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
     H5D_chk_idx_info_t      idx_info;           /* Chunked index info */
     H5D_io_info_t           chk_io_info;        /* Chunked I/O info object */
     H5D_storage_t           chk_store;          /* Chunk storage information */
-    H5D_dxpl_cache_t        _dxpl_cache;        /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t       *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     const H5O_layout_t     *layout = &(dset->shared->layout);   /* Dataset's layout */
     const H5D_rdcc_t       *rdcc = &(dset->shared->cache.chunk);	/*raw data chunk cache */
     unsigned                space_ndims;        /* Dataset's space rank */
@@ -4801,11 +4954,6 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
     HDassert(dset && H5D_CHUNKED == layout->type);
     HDassert(layout->u.chunk.ndims > 0 && layout->u.chunk.ndims <= H5O_LAYOUT_NDIMS);
     H5D_CHUNK_STORAGE_INDEX_CHK(sc);
-    HDassert(dxpl_cache);
-
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
 
     /* Go get the rank & dimensions (including the element size) */
     space_dim = dset->shared->curr_dims;
@@ -4846,11 +4994,10 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
      * Note that we only need to set scaled once, as the array's address
      * will never change. */
     chk_store.chunk.scaled = scaled;
-    H5D_BUILD_IO_INFO_RD(&chk_io_info, dset, dxpl_cache, dxpl_id, H5AC_rawdata_dxpl_id, &chk_store, NULL);
+    H5D_BUILD_IO_INFO_RD(&chk_io_info, dset, &chk_store, NULL);
 
     /* Compose chunked index info struct */
     idx_info.f = dset->oloc.file;
-    idx_info.dxpl_id = dxpl_id;
     idx_info.pline = &dset->shared->dcpl_cache.pline;
     idx_info.layout = &dset->shared->layout.u.chunk;
     idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -5009,13 +5156,13 @@ H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id, const hsize_t *old_dim)
 #endif /* NDEBUG */
 
                 /* Check if the chunk exists in cache or on disk */
-                if(H5D__chunk_lookup(dset, dxpl_id, scaled, &chk_udata) < 0)
+                if(H5D__chunk_lookup(dset, scaled, &chk_udata) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk")
 
                 /* Evict the entry from the cache if present, but do not flush
                  * it to disk */
                 if(UINT_MAX != chk_udata.idx_hint)
-                    if(H5D__chunk_cache_evict(dset, dxpl_id, dxpl_cache, rdcc->slot[chk_udata.idx_hint], FALSE) < 0)
+                    if(H5D__chunk_cache_evict(dset, rdcc->slot[chk_udata.idx_hint], FALSE) < 0)
                         HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to evict chunk")
 
                 /* Remove the chunk from disk, if present */
@@ -5161,7 +5308,6 @@ H5D__chunk_addrmap(const H5D_io_info_t *io_info, haddr_t chunk_addr[])
 
     /* Compose chunked index info struct */
     idx_info.f = dset->oloc.file;
-    idx_info.dxpl_id = io_info->md_dxpl_id;
     idx_info.pline = &dset->shared->dcpl_cache.pline;
     idx_info.layout = &dset->shared->layout.u.chunk;
     idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -5190,7 +5336,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_storage_t *storage)
+H5D__chunk_delete(H5F_t *f, H5O_t *oh, H5O_storage_t *storage)
 {
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
     H5O_layout_t layout;                /* Dataset layout  message */
@@ -5213,7 +5359,7 @@ H5D__chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_storage_t *storage)
     if((exists = H5O_msg_exists_oh(oh, H5O_PLINE_ID)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to check for object header message")
     else if(exists) {
-        if(NULL == H5O_msg_read_oh(f, dxpl_id, oh, H5O_PLINE_ID, &pline))
+        if(NULL == H5O_msg_read_oh(f, oh, H5O_PLINE_ID, &pline))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get I/O pipeline message")
         pline_read = TRUE;
     } /* end else if */
@@ -5224,7 +5370,7 @@ H5D__chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_storage_t *storage)
     if((exists = H5O_msg_exists_oh(oh, H5O_LAYOUT_ID)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to check for object header message")
     else if(exists) {
-        if(NULL == H5O_msg_read_oh(f, dxpl_id, oh, H5O_LAYOUT_ID, &layout))
+        if(NULL == H5O_msg_read_oh(f, oh, H5O_LAYOUT_ID, &layout))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get layout message")
         layout_read = TRUE;
     } /* end else if */
@@ -5233,7 +5379,6 @@ H5D__chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_storage_t *storage)
 
     /* Compose chunked index info struct */
     idx_info.f = f;
-    idx_info.dxpl_id = dxpl_id;
     idx_info.pline = &pline;
     idx_info.layout = &layout.u.chunk;
     idx_info.storage = &storage->u.chunk;
@@ -5270,14 +5415,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_update_cache(H5D_t *dset, hid_t dxpl_id)
+H5D__chunk_update_cache(H5D_t *dset)
 {
     H5D_rdcc_t         *rdcc = &(dset->shared->cache.chunk);	/*raw data chunk cache */
     H5D_rdcc_ent_t     *ent, *next;	/*cache entry  */
     H5D_rdcc_ent_t     tmp_head;        /* Sentinel entry for temporary entry list */
     H5D_rdcc_ent_t     *tmp_tail;       /* Tail pointer for temporary entry list */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     herr_t              ret_value = SUCCEED;      /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -5289,10 +5432,6 @@ H5D__chunk_update_cache(H5D_t *dset, hid_t dxpl_id)
     /* Check the rank */
     HDassert((dset->shared->layout.u.chunk.ndims - 1) > 1);
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Add temporary entry list to rdcc */
     (void)HDmemset(&tmp_head, 0, sizeof(tmp_head));
     rdcc->tmp_head = &tmp_head;
@@ -5362,7 +5501,7 @@ H5D__chunk_update_cache(H5D_t *dset, hid_t dxpl_id)
         ent = tmp_head.tmp_next;
 
         /* Remove the old entry from the cache */
-        if(H5D__chunk_cache_evict(dset, dxpl_id, dxpl_cache, ent, TRUE) < 0)
+        if(H5D__chunk_cache_evict(dset, ent, TRUE) < 0)
             HGOTO_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "unable to flush one or more raw data chunks")
     } /* end while */
 
@@ -5405,7 +5544,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     /* needed for commpressed variable length data */
     hbool_t                 must_filter = FALSE;        /* Whether chunk must be filtered during copy */
     size_t                  nbytes;                     /* Size of chunk in file (in bytes) */
-    H5Z_cb_t                cb_struct;                  /* Filter failure callback struct */
+    H5Z_cb_t                filter_cb;                  /* Filter failure callback struct */
     int                     ret_value = H5_ITER_CONT;   /* Return value */
 
     FUNC_ENTER_STATIC
@@ -5413,6 +5552,20 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     /* Get 'size_t' local value for number of bytes in chunk */
     H5_CHECKED_ASSIGN(nbytes, size_t, chunk_rec->nbytes, uint32_t);
 
+    /* Initialize the filter callback struct */
+    filter_cb.op_data = NULL;
+    filter_cb.func = NULL;      /* no callback function when failed */
+
+    /* Check for filtered chunks */
+    /* Check for an edge chunk that is not filtered */
+    if(pline && pline->nused) {
+        must_filter = TRUE;
+        if( (udata->common.layout->flags & H5O_LAYOUT_CHUNK_DONT_FILTER_PARTIAL_BOUND_CHUNKS) &&
+            (H5D__chunk_is_partial_edge_chunk(udata->dset_ndims, udata->common.layout->dim, 
+                                              chunk_rec->scaled, udata->dset_dims)) )
+            must_filter = FALSE;
+    }
+
     /* Check parameter for type conversion */
     if(udata->do_convert) {
         if(H5T_detect_class(udata->dt_src, H5T_VLEN, FALSE) > 0)
@@ -5423,19 +5576,6 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy dataset elements")
     } /* end if */
 
-    /* Check for filtered chunks */
-    if((is_vlen || fix_ref) && pline && pline->nused) {
-        /* Check if we should disable filters on this chunk */
-        if(udata->common.layout->flags
-                & H5O_LAYOUT_CHUNK_DONT_FILTER_PARTIAL_BOUND_CHUNKS) {
-            /* Check if the chunk is an edge chunk, and disable filters if so */
-            if(!H5D__chunk_is_partial_edge_chunk(udata->dset_ndims, udata->common.layout->dim, chunk_rec->scaled, udata->dset_dims))
-                must_filter = TRUE;
-        } /* end if */
-        else
-            must_filter = TRUE;
-    } /* end if */
-
     /* Resize the buf if it is too small to hold the data */
     if(nbytes > buf_size) {
         void *new_buf;          /* New buffer for data */
@@ -5458,16 +5598,56 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
         udata->buf_size = buf_size = nbytes;
     } /* end if */
 
-    /* read chunk data from the source file */
-    if(H5F_block_read(udata->file_src, H5FD_MEM_DRAW, chunk_rec->chunk_addr, nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
-        HGOTO_ERROR(H5E_IO, H5E_READERROR, H5_ITER_ERROR, "unable to read raw data chunk")
+    if(udata->chunk_in_cache && udata->chunk) {
+        HDassert(!H5F_addr_defined(chunk_rec->chunk_addr));
+        HDmemcpy(buf, udata->chunk, nbytes);
+        udata->chunk = NULL;
+    }
+    else {
+        H5D_rdcc_ent_t *ent = NULL;    /* Cache entry */
+        unsigned idx;                   /* Index of chunk in cache, if present */
+        unsigned u;                     /* Counter */
+        H5D_shared_t *shared_fo = (H5D_shared_t *)udata->cpy_info->shared_fo;
+
+        /* See if the written chunk is in the chunk cache */
+        if(shared_fo && shared_fo->cache.chunk.nslots > 0) {
+            /* Determine the chunk's location in the hash table */
+            idx = H5D__chunk_hash_val(shared_fo, chunk_rec->scaled);
+
+            /* Get the chunk cache entry for that location */
+            ent = shared_fo->cache.chunk.slot[idx];
+            if(ent) {
+                /* Speculatively set the 'found' flag */
+                udata->chunk_in_cache = TRUE;
+
+                /* Verify that the cache entry is the correct chunk */
+                for(u = 0; u < shared_fo->ndims; u++)
+                    if(chunk_rec->scaled[u] != ent->scaled[u]) {
+                        udata->chunk_in_cache = FALSE;
+                        break;
+                    } /* end if */
+            } /* end if */
+        } /* end if */
+
+        if(udata->chunk_in_cache) {
+            HDassert(H5F_addr_defined(chunk_rec->chunk_addr));
+            HDassert(H5F_addr_defined(ent->chunk_block.offset));
+
+            H5_CHECKED_ASSIGN(nbytes, size_t, shared_fo->layout.u.chunk.size, uint32_t);
+            HDmemcpy(buf, ent->chunk, nbytes);
+        }
+        else {
+            /* read chunk data from the source file */
+            if(H5F_block_read(udata->file_src, H5FD_MEM_DRAW, chunk_rec->chunk_addr, nbytes, buf) < 0)
+                HGOTO_ERROR(H5E_IO, H5E_READERROR, H5_ITER_ERROR, "unable to read raw data chunk")
+        }
+    }
 
-    /* Need to uncompress variable-length & reference data elements */
-    if(must_filter) {
+    /* Need to uncompress filtered variable-length & reference data elements that are not found in chunk cache */
+    if(must_filter && (is_vlen || fix_ref) && !udata->chunk_in_cache) {
         unsigned filter_mask = chunk_rec->filter_mask;
 
-        cb_struct.func = NULL; /* no callback function when failed */
-        if(H5Z_pipeline(pline, H5Z_FLAG_REVERSE, &filter_mask, H5Z_NO_EDC, cb_struct, &nbytes, &buf_size, &buf) < 0)
+        if(H5Z_pipeline(pline, H5Z_FLAG_REVERSE, &filter_mask, H5Z_NO_EDC, filter_cb, &nbytes, &buf_size, &buf) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "data pipeline read failed")
     } /* end if */
 
@@ -5484,7 +5664,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
 
         /* Convert from source file to memory */
         H5_CHECK_OVERFLOW(udata->nelmts, uint32_t, size_t);
-        if(H5T_convert(tpath_src_mem, tid_src, tid_mem, (size_t)udata->nelmts, (size_t)0, (size_t)0, buf, bkg, udata->idx_info_dst->dxpl_id) < 0)
+        if(H5T_convert(tpath_src_mem, tid_src, tid_mem, (size_t)udata->nelmts, (size_t)0, (size_t)0, buf, bkg) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5_ITER_ERROR, "datatype conversion failed")
 
         /* Copy into another buffer, to reclaim memory later */
@@ -5494,11 +5674,11 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
         HDmemset(bkg, 0, buf_size);
 
         /* Convert from memory to destination file */
-        if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, udata->nelmts, (size_t)0, (size_t)0, buf, bkg, udata->idx_info_dst->dxpl_id) < 0)
+        if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, udata->nelmts, (size_t)0, (size_t)0, buf, bkg) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5_ITER_ERROR, "datatype conversion failed")
 
         /* Reclaim space from variable length data */
-        if(H5D_vlen_reclaim(tid_mem, buf_space, udata->idx_info_dst->dxpl_id, reclaim_buf) < 0)
+        if(H5D_vlen_reclaim(tid_mem, buf_space, reclaim_buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_BADITER, H5_ITER_ERROR, "unable to reclaim variable-length data")
     } /* end if */
     else if(fix_ref) {
@@ -5511,7 +5691,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
             ref_count = nbytes / H5T_get_size(udata->dt_src);
 
             /* Copy the reference elements */
-            if(H5O_copy_expand_ref(udata->file_src, buf, udata->idx_info_dst->dxpl_id, udata->idx_info_dst->f, bkg, ref_count, H5T_get_ref_type(udata->dt_src), udata->cpy_info) < 0)
+            if(H5O_copy_expand_ref(udata->file_src, buf, udata->idx_info_dst->f, bkg, ref_count, H5T_get_ref_type(udata->dt_src), udata->cpy_info) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy reference attribute")
         } /* end if */
 
@@ -5527,9 +5707,9 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     udata_dst.chunk_block.length = chunk_rec->nbytes;
     udata_dst.filter_mask = chunk_rec->filter_mask;
 
-    /* Need to compress variable-length & reference data elements before writing to file */
-    if(must_filter) {
-        if(H5Z_pipeline(pline, 0, &(udata_dst.filter_mask), H5Z_NO_EDC, cb_struct, &nbytes, &buf_size, &buf) < 0)
+    /* Need to compress variable-length or reference data elements or a chunk found in cache before writing to file */
+    if(must_filter && (is_vlen || fix_ref || udata->chunk_in_cache) ) {
+        if(H5Z_pipeline(pline, 0, &(udata_dst.filter_mask), H5Z_NO_EDC, filter_cb, &nbytes, &buf_size, &buf) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "output pipeline failed")
 #if H5_SIZEOF_SIZE_T > 4
         /* Check for the chunk expanding too much to encode in a 32-bit value */
@@ -5537,12 +5717,14 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
             HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, H5_ITER_ERROR, "chunk too large for 32-bit length")
 #endif /* H5_SIZEOF_SIZE_T > 4 */
         H5_CHECKED_ASSIGN(udata_dst.chunk_block.length, uint32_t, nbytes, size_t);
-	udata->buf = buf;
-	udata->buf_size = buf_size;
+        udata->buf = buf;
+        udata->buf_size = buf_size;
     } /* end if */
 
+    udata->chunk_in_cache = FALSE;
+
     udata_dst.chunk_idx = H5VM_array_offset_pre(udata_dst.common.layout->ndims - 1, 
-			    udata_dst.common.layout->max_down_chunks, udata_dst.common.scaled);
+	udata_dst.common.layout->max_down_chunks, udata_dst.common.scaled);
 
     /* Allocate chunk in the file */
     if(H5D__chunk_file_alloc(udata->idx_info_dst, NULL, &udata_dst.chunk_block, &need_insert, udata_dst.common.scaled) < 0)
@@ -5550,19 +5732,19 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
 
     /* Write chunk data to destination file */
     HDassert(H5F_addr_defined(udata_dst.chunk_block.offset));
-    if(H5F_block_write(udata->idx_info_dst->f, H5FD_MEM_DRAW, udata_dst.chunk_block.offset, nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
+    if(H5F_block_write(udata->idx_info_dst->f, H5FD_MEM_DRAW, udata_dst.chunk_block.offset, nbytes, buf) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to write raw data to file")
 
-    /* Set metadata tag in dxpl_id */
-    H5_BEGIN_TAG(udata->idx_info_dst->dxpl_id, H5AC__COPIED_TAG, H5_ITER_ERROR);
+    /* Set metadata tag in API context */
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Insert chunk record into index */
     if(need_insert && udata->idx_info_dst->storage->ops->insert)
         if((udata->idx_info_dst->storage->ops->insert)(udata->idx_info_dst, &udata_dst, NULL) < 0)
             HGOTO_ERROR_TAG(H5E_DATASET, H5E_CANTINSERT, H5_ITER_ERROR, "unable to insert chunk addr into index")
 
-    /* Reset metadata tag in dxpl_id */
-    H5_END_TAG(H5_ITER_ERROR);
+    /* Reset metadata tag in API context */
+    H5_END_TAG
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -5586,7 +5768,7 @@ herr_t
 H5D__chunk_copy(H5F_t *f_src, H5O_storage_chunk_t *storage_src,
     H5O_layout_chunk_t *layout_src, H5F_t *f_dst, H5O_storage_chunk_t *storage_dst,
     const H5S_extent_t *ds_extent_src, const H5T_t *dt_src,
-    const H5O_pline_t *pline_src, H5O_copy_t *cpy_info, hid_t dxpl_id)
+    const H5O_pline_t *pline_src, H5O_copy_t *cpy_info)
 {
     H5D_chunk_it_ud3_t udata;           /* User data for iteration callback */
     H5D_chk_idx_info_t idx_info_dst;    /* Dest. chunked index info */
@@ -5653,13 +5835,11 @@ H5D__chunk_copy(H5F_t *f_src, H5O_storage_chunk_t *storage_src,
 
     /* Compose source & dest chunked index info structs */
     idx_info_src.f = f_src;
-    idx_info_src.dxpl_id = dxpl_id;
     idx_info_src.pline = pline;
     idx_info_src.layout = layout_src;
     idx_info_src.storage = storage_src;
 
     idx_info_dst.f = f_dst;
-    idx_info_dst.dxpl_id = dxpl_id;
     idx_info_dst.pline = pline;     /* Use same I/O filter pipeline for dest. */
     idx_info_dst.layout = layout_src /* Use same layout for dest. */;
     idx_info_dst.storage = storage_dst;
@@ -5687,7 +5867,7 @@ H5D__chunk_copy(H5F_t *f_src, H5O_storage_chunk_t *storage_src,
         if(NULL == (dt_mem = H5T_copy(dt_src, H5T_COPY_TRANSIENT)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy")
         if((tid_mem = H5I_register(H5I_DATATYPE, dt_mem, FALSE)) < 0) {
-            (void)H5T_close(dt_mem);
+            (void)H5T_close_real(dt_mem);
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register memory datatype")
         } /* end if */
 
@@ -5695,18 +5875,18 @@ H5D__chunk_copy(H5F_t *f_src, H5O_storage_chunk_t *storage_src,
         if(NULL == (dt_dst = H5T_copy(dt_src, H5T_COPY_TRANSIENT)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy")
         if(H5T_set_loc(dt_dst, f_dst, H5T_LOC_DISK) < 0) {
-            (void)H5T_close(dt_dst);
+            (void)H5T_close_real(dt_dst);
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "cannot mark datatype on disk")
         } /* end if */
         if((tid_dst = H5I_register(H5I_DATATYPE, dt_dst, FALSE)) < 0) {
-            (void)H5T_close(dt_dst);
+            (void)H5T_close_real(dt_dst);
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register destination file datatype")
         } /* end if */
 
         /* Set up the conversion functions */
-        if(NULL == (tpath_src_mem = H5T_path_find(dt_src, dt_mem, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath_src_mem = H5T_path_find(dt_src, dt_mem)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert between src and mem datatypes")
-        if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, dt_dst, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, dt_dst)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert between mem and dst datatypes")
 
         /* Determine largest datatype size */
@@ -5797,11 +5977,35 @@ H5D__chunk_copy(H5F_t *f_src, H5O_storage_chunk_t *storage_src,
     udata.dset_ndims = (unsigned)sndims;
     udata.dset_dims = curr_dims;
     udata.cpy_info = cpy_info;
+    udata.chunk_in_cache = FALSE;
+    udata.chunk = NULL;
 
     /* Iterate over chunks to copy data */
     if((storage_src->ops->iterate)(&idx_info_src, H5D__chunk_copy_cb, &udata) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to iterate over chunk index to copy data")
 
+    /* Iterate over the chunk cache to copy data for chunks with undefined address */
+    if(udata.cpy_info->shared_fo) {
+        H5D_rdcc_ent_t  *ent, *next;
+        H5D_chunk_rec_t chunk_rec;
+        H5D_shared_t *shared_fo = (H5D_shared_t *)udata.cpy_info->shared_fo;
+
+        chunk_rec.nbytes = layout_src->size;
+        chunk_rec.filter_mask = 0;
+        chunk_rec.chunk_addr = HADDR_UNDEF;
+
+        for(ent = shared_fo->cache.chunk.head; ent; ent = next) {
+            if(!H5F_addr_defined(ent->chunk_block.offset)) {
+                HDmemcpy(chunk_rec.scaled, ent->scaled, sizeof(chunk_rec.scaled));
+                udata.chunk = ent->chunk;
+                udata.chunk_in_cache = TRUE;
+                if(H5D__chunk_copy_cb(&chunk_rec, &udata) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "unable to copy chunk data in cache")
+            }
+            next = ent->next;
+        } /* end for */
+    }
+
     /* I/O buffers may have been re-allocated */
     buf = udata.buf;
     bkg = udata.bkg;
@@ -5824,7 +6028,7 @@ done:
 
     /* Clean up any index information */
     if(copy_setup_done)
-        if(storage_src->ops->copy_shutdown && (storage_src->ops->copy_shutdown)(storage_src, storage_dst, dxpl_id) < 0)
+        if(storage_src->ops->copy_shutdown && (storage_src->ops->copy_shutdown)(storage_src, storage_dst) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to shut down index copying info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -5845,7 +6049,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5O_layout_t *layout,
+H5D__chunk_bh_info(const H5O_loc_t *loc, H5O_t *oh, H5O_layout_t *layout,
     hsize_t *index_size)
 {
     H5D_chk_idx_info_t idx_info;        /* Chunked index info */
@@ -5871,7 +6075,7 @@ H5D__chunk_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5O_layout_t
     if((exists = H5O_msg_exists_oh(oh, H5O_PLINE_ID)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to read object header")
     else if(exists) {
-        if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_PLINE_ID, &pline))
+        if(NULL == H5O_msg_read_oh(loc->file, oh, H5O_PLINE_ID, &pline))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't find I/O pipeline message")
         pline_read = TRUE;
     } /* end else if */
@@ -5880,13 +6084,12 @@ H5D__chunk_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5O_layout_t
 
     /* Compose chunked index info struct */
     idx_info.f = loc->file;
-    idx_info.dxpl_id = dxpl_id;
     idx_info.pline = &pline;
     idx_info.layout = &layout->u.chunk;
     idx_info.storage = &layout->storage.u.chunk;
 
     /* Get the dataspace for the dataset */
-    if(NULL == (space = H5S_read(loc, dxpl_id)))
+    if(NULL == (space = H5S_read(loc)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to load dataspace info from dataset header")
 
     /* Allocate any indexing structures */
@@ -5972,7 +6175,7 @@ H5D__chunk_dump_index_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__chunk_dump_index(H5D_t *dset, hid_t dxpl_id, FILE *stream)
+H5D__chunk_dump_index(H5D_t *dset, FILE *stream)
 {
     H5O_storage_chunk_t *sc = &(dset->shared->layout.storage.u.chunk);
     herr_t ret_value = SUCCEED;       /* Return value */
@@ -5994,7 +6197,6 @@ H5D__chunk_dump_index(H5D_t *dset, hid_t dxpl_id, FILE *stream)
 
         /* Compose chunked index info struct */
         idx_info.f = dset->oloc.file;
-        idx_info.dxpl_id = dxpl_id;
         idx_info.pline = &dset->shared->dcpl_cache.pline;
         idx_info.layout = &dset->shared->layout.u.chunk;
         idx_info.storage = &dset->shared->layout.storage.u.chunk;
@@ -6111,12 +6313,12 @@ H5D__nonexistent_readvv_cb(hsize_t H5_ATTR_UNUSED dst_off, hsize_t src_off, size
     /* Initialize the fill value buffer */
     if(H5D__fill_init(&fb_info, (udata->rbuf + src_off), NULL, NULL, NULL, NULL,
             &udata->dset->shared->dcpl_cache.fill, udata->dset->shared->type,
-            udata->dset->shared->type_id, (size_t)0, len, udata->dxpl_id) < 0)
+            udata->dset->shared->type_id, (size_t)0, len) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize fill buffer info")
     fb_info_init = TRUE;
 
     /* Check for VL datatype & fill the buffer with VL datatype fill values */
-    if(fb_info.has_vlen_fill_type && H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf, udata->dxpl_id) < 0)
+    if(fb_info.has_vlen_fill_type && H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "can't refill fill value buffer")
 
 done:
@@ -6170,7 +6372,6 @@ H5D__nonexistent_readvv(const H5D_io_info_t *io_info,
     /* Set up user data for H5VM_opvv() */
     udata.rbuf = (unsigned char *)io_info->u.rbuf;
     udata.dset = io_info->dset;
-    udata.dxpl_id = io_info->md_dxpl_id;
 
     /* Call generic sequence operation routine */
     if((ret_value = H5VM_opvv(chunk_max_nseq, chunk_curr_seq, chunk_len_arr, chunk_off_arr,
@@ -6236,7 +6437,7 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-static herr_t
+herr_t
 H5D__chunk_file_alloc(const H5D_chk_idx_info_t *idx_info, const H5F_block_t *old_chunk,
     H5F_block_t *new_chunk, hbool_t *need_insert, hsize_t scaled[])
 {
@@ -6293,7 +6494,7 @@ H5D__chunk_file_alloc(const H5D_chk_idx_info_t *idx_info, const H5F_block_t *old
                  * outdated version of the B-tree node
                  */
 		if(!(H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE))
-		    if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, old_chunk->offset, old_chunk->length) < 0)
+		    if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, old_chunk->offset, old_chunk->length) < 0)
 			HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to free chunk")
 		alloc_chunk = TRUE;
 	    } /* end if */
@@ -6336,7 +6537,7 @@ H5D__chunk_file_alloc(const H5D_chk_idx_info_t *idx_info, const H5F_block_t *old
             case H5D_CHUNK_IDX_SINGLE:
                 HDassert(new_chunk->length > 0);
                 H5_CHECK_OVERFLOW(new_chunk->length, /*From: */uint32_t, /*To: */hsize_t);
-                new_chunk->offset = H5MF_alloc(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, (hsize_t)new_chunk->length);
+                new_chunk->offset = H5MF_alloc(idx_info->f, H5FD_MEM_DRAW, (hsize_t)new_chunk->length);
                 if(!H5F_addr_defined(new_chunk->offset))
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "file allocation failed")
                 *need_insert = TRUE;
@@ -6388,46 +6589,49 @@ H5D__chunk_format_convert_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     H5_CHECKED_ASSIGN(nbytes, size_t, chunk_rec->nbytes, uint32_t);
     chunk_addr = chunk_rec->chunk_addr;
 
-    if(new_idx_info->pline->nused &&
+    if (new_idx_info->pline->nused &&
           (new_idx_info->layout->flags & H5O_LAYOUT_CHUNK_DONT_FILTER_PARTIAL_BOUND_CHUNKS) &&
           (H5D__chunk_is_partial_edge_chunk(udata->dset_ndims, new_idx_info->layout->dim, chunk_rec->scaled, udata->dset_dims))) {
-	/* This is a partial non-filtered edge chunk */
-	/* Convert the chunk to a filtered edge chunk for v1 B-tree chunk index */
 
-	unsigned filter_mask = chunk_rec->filter_mask;
-	H5Z_cb_t  cb_struct;        	/* Filter failure callback struct */
-	size_t read_size = nbytes;	/* Bytes to read */
+        /* This is a partial non-filtered edge chunk */
+        /* Convert the chunk to a filtered edge chunk for v1 B-tree chunk index */
+
+        unsigned filter_mask = chunk_rec->filter_mask;
+        H5Z_cb_t  filter_cb;        /* Filter failure callback struct */
+        size_t read_size = nbytes;	/* Bytes to read */
 
-	HDassert(read_size == new_idx_info->layout->size);
+        HDassert(read_size == new_idx_info->layout->size);
 
-	cb_struct.func = NULL; /* no callback function when failed */
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;      /* no callback function when failed */
 
-	/* Allocate buffer for chunk data */
-	if(NULL == (buf = H5MM_malloc(read_size)))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed for raw data chunk")
+        /* Allocate buffer for chunk data */
+        if (NULL == (buf = H5MM_malloc(read_size)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed for raw data chunk")
 
-	/* Read the non-filtered edge chunk */
-        if(H5F_block_read(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, read_size, H5AC_rawdata_dxpl_id, buf) < 0)
-	    HGOTO_ERROR(H5E_IO, H5E_READERROR, H5_ITER_ERROR, "unable to read raw data chunk")
+        /* Read the non-filtered edge chunk */
+        if(H5F_block_read(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, read_size, buf) < 0)
+            HGOTO_ERROR(H5E_IO, H5E_READERROR, H5_ITER_ERROR, "unable to read raw data chunk")
 
-	/* Pass the chunk through the pipeline */
-	if(H5Z_pipeline(new_idx_info->pline, 0, &filter_mask, H5Z_NO_EDC, cb_struct, &nbytes, &read_size, &buf) < 0)
-	    HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "output pipeline failed")
+        /* Pass the chunk through the pipeline */
+        if (H5Z_pipeline(new_idx_info->pline, 0, &filter_mask, H5Z_NO_EDC, filter_cb, &nbytes, &read_size, &buf) < 0)
+            HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, H5_ITER_ERROR, "output pipeline failed")
 
 #if H5_SIZEOF_SIZE_T > 4
         /* Check for the chunk expanding too much to encode in a 32-bit value */
-	if(nbytes > ((size_t)0xffffffff))
-	    HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, H5_ITER_ERROR, "chunk too large for 32-bit length")
+        if (nbytes > ((size_t)0xffffffff))
+            HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, H5_ITER_ERROR, "chunk too large for 32-bit length")
 #endif /* H5_SIZEOF_SIZE_T > 4 */
 
-	/* Allocate space for the filtered chunk */
-	if((chunk_addr = H5MF_alloc(new_idx_info->f, H5FD_MEM_DRAW, new_idx_info->dxpl_id, (hsize_t)nbytes)) == HADDR_UNDEF)
-	    HGOTO_ERROR(H5E_DATASET, H5E_NOSPACE, H5_ITER_ERROR, "file allocation failed for filtered chunk")
-	HDassert(H5F_addr_defined(chunk_addr));
+        /* Allocate space for the filtered chunk */
+        if ((chunk_addr = H5MF_alloc(new_idx_info->f, H5FD_MEM_DRAW, (hsize_t)nbytes)) == HADDR_UNDEF)
+            HGOTO_ERROR(H5E_DATASET, H5E_NOSPACE, H5_ITER_ERROR, "file allocation failed for filtered chunk")
+        HDassert(H5F_addr_defined(chunk_addr));
 
-	/* Write the filtered chunk to disk */
-	if(H5F_block_write(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to write raw data to file")
+        /* Write the filtered chunk to disk */
+        if (H5F_block_write(new_idx_info->f, H5FD_MEM_DRAW, chunk_addr, nbytes, buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to write raw data to file")
     } /* end if */
 
     /* Set up chunk information for insertion to chunk index */
@@ -6439,11 +6643,11 @@ H5D__chunk_format_convert_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     insert_udata.common.storage = new_idx_info->storage;
 
     /* Insert chunk into the v1 B-tree chunk index */
-    if((new_idx_info->storage->ops->insert)(new_idx_info, &insert_udata, NULL) < 0)
+    if ((new_idx_info->storage->ops->insert)(new_idx_info, &insert_udata, NULL) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, H5_ITER_ERROR, "unable to insert chunk addr into index")
 
 done:
-    if(buf)
+    if (buf)
         H5MM_xfree(buf);
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Dcompact.c b/src/H5Dcompact.c
index 224a1d1..c0c2a80 100644
--- a/src/H5Dcompact.c
+++ b/src/H5Dcompact.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -69,8 +67,8 @@ static ssize_t H5D__compact_readvv(const H5D_io_info_t *io_info,
 static ssize_t H5D__compact_writevv(const H5D_io_info_t *io_info,
     size_t dset_max_nseq, size_t *dset_curr_seq, size_t dset_size_arr[], hsize_t dset_offset_arr[],
     size_t mem_max_nseq, size_t *mem_curr_seq, size_t mem_size_arr[], hsize_t mem_offset_arr[]);
-static herr_t H5D__compact_flush(H5D_t *dset, hid_t dxpl_id);
-static herr_t H5D__compact_dest(H5D_t *dset, hid_t dxpl_id);
+static herr_t H5D__compact_flush(H5D_t *dset);
+static herr_t H5D__compact_dest(H5D_t *dset);
 
 
 /*********************/
@@ -119,7 +117,7 @@ H5FL_BLK_EXTERN(type_conv);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__compact_fill(const H5D_t *dset, hid_t dxpl_id)
+H5D__compact_fill(const H5D_t *dset)
 {
     H5D_fill_buf_info_t fb_info;        /* Dataset's fill buffer info */
     hbool_t     fb_info_init = FALSE;   /* Whether the fill value buffer has been initialized */
@@ -128,7 +126,6 @@ H5D__compact_fill(const H5D_t *dset, hid_t dxpl_id)
     FUNC_ENTER_PACKAGE
 
     /* Check args */
-    HDassert(TRUE == H5P_isa_class(dxpl_id, H5P_DATASET_XFER));
     HDassert(dset && H5D_COMPACT == dset->shared->layout.type);
     HDassert(dset->shared->layout.storage.u.compact.buf);
     HDassert(dset->shared->type);
@@ -139,14 +136,14 @@ H5D__compact_fill(const H5D_t *dset, hid_t dxpl_id)
     if(H5D__fill_init(&fb_info, dset->shared->layout.storage.u.compact.buf,
             NULL, NULL, NULL, NULL,
             &dset->shared->dcpl_cache.fill, dset->shared->type,
-            dset->shared->type_id, (size_t)0, dset->shared->layout.storage.u.compact.size, dxpl_id) < 0)
+            dset->shared->type_id, (size_t)0, dset->shared->layout.storage.u.compact.size) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize fill buffer info")
     fb_info_init = TRUE;
 
     /* Check for VL datatype & non-default fill value */
     if(fb_info.has_vlen_fill_type)
         /* Fill the buffer with VL datatype fill values */
-        if(H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf, dxpl_id) < 0)
+        if(H5D__fill_refill_vl(&fb_info, fb_info.elmts_per_buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "can't refill fill value buffer")
 
 done:
@@ -359,7 +356,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__compact_flush(H5D_t *dset, hid_t dxpl_id)
+H5D__compact_flush(H5D_t *dset)
 {
     herr_t ret_value = SUCCEED;       /* Return value */
 
@@ -370,9 +367,11 @@ H5D__compact_flush(H5D_t *dset, hid_t dxpl_id)
 
     /* Check if the buffered compact information is dirty */
     if(dset->shared->layout.storage.u.compact.dirty) {
-        if(H5O_msg_write(&(dset->oloc), H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, &(dset->shared->layout), dxpl_id) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update layout message")
         dset->shared->layout.storage.u.compact.dirty = FALSE;
+        if(H5O_msg_write(&(dset->oloc), H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, &(dset->shared->layout)) < 0) {
+            dset->shared->layout.storage.u.compact.dirty = TRUE;
+            HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update layout message")
+        }
     } /* end if */
 
 done:
@@ -393,7 +392,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__compact_dest(H5D_t *dset, hid_t H5_ATTR_UNUSED dxpl_id)
+H5D__compact_dest(H5D_t *dset)
 {
     FUNC_ENTER_STATIC_NOERR
 
@@ -420,9 +419,8 @@ H5D__compact_dest(H5D_t *dset, hid_t H5_ATTR_UNUSED dxpl_id)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst,
-    H5O_storage_compact_t *storage_dst, H5T_t *dt_src, H5O_copy_t *cpy_info,
-    hid_t dxpl_id)
+H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *_storage_src, H5F_t *f_dst,
+    H5O_storage_compact_t *storage_dst, H5T_t *dt_src, H5O_copy_t *cpy_info)
 {
     hid_t       tid_src = -1;           /* Datatype ID for source datatype */
     hid_t       tid_dst = -1;           /* Datatype ID for destination datatype */
@@ -431,6 +429,8 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst
     void       *bkg = NULL;             /* Temporary buffer for copying data */
     void       *reclaim_buf = NULL;     /* Buffer for reclaiming data */
     hid_t       buf_sid = -1;           /* ID for buffer dataspace */
+    H5D_shared_t    *shared_fo = (H5D_shared_t *)cpy_info->shared_fo;   /* Pointer to the shared struct for dataset object */
+    H5O_storage_compact_t *storage_src = _storage_src;  /* Pointer to storage_src */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -443,6 +443,10 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst
     HDassert(storage_dst->buf);
     HDassert(dt_src);
 
+    /* If the dataset is open in the file, point to "layout" in the shared struct */
+    if(shared_fo != NULL)
+        storage_src = &(shared_fo->layout.storage.u.compact);
+
     /* Create datatype ID for src datatype, so it gets freed */
     if((tid_src = H5I_register(H5I_DATATYPE, dt_src, FALSE)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register source file datatype")
@@ -464,7 +468,7 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst
         if(NULL == (dt_mem = H5T_copy(dt_src, H5T_COPY_TRANSIENT)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy")
         if((tid_mem = H5I_register(H5I_DATATYPE, dt_mem, FALSE)) < 0) {
-            H5T_close(dt_mem);
+            (void)H5T_close_real(dt_mem);
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register memory datatype")
         } /* end if */
 
@@ -472,18 +476,18 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst
         if(NULL == (dt_dst = H5T_copy(dt_src, H5T_COPY_TRANSIENT)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy")
         if(H5T_set_loc(dt_dst, f_dst, H5T_LOC_DISK) < 0) {
-            H5T_close(dt_dst);
+            (void)H5T_close_real(dt_dst);
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "cannot mark datatype on disk")
         } /* end if */
         if((tid_dst = H5I_register(H5I_DATATYPE, dt_dst, FALSE)) < 0) {
-            H5T_close(dt_dst);
+            (void)H5T_close_real(dt_dst);
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register destination file datatype")
         } /* end if */
 
         /* Set up the conversion functions */
-        if(NULL == (tpath_src_mem = H5T_path_find(dt_src, dt_mem, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath_src_mem = H5T_path_find(dt_src, dt_mem)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to convert between src and mem datatypes")
-        if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, dt_dst, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, dt_dst)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to convert between mem and dst datatypes")
 
         /* Determine largest datatype size */
@@ -531,7 +535,7 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
         /* Convert from source file to memory */
-        if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, bkg, dxpl_id) < 0)
+        if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, bkg) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
         /* Copy into another buffer, to reclaim memory later */
@@ -541,12 +545,12 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst
         HDmemset(bkg, 0, buf_size);
 
         /* Convert from memory to destination file */
-        if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg, dxpl_id) < 0)
+        if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
         HDmemcpy(storage_dst->buf, buf, storage_dst->size);
 
-        if(H5D_vlen_reclaim(tid_mem, buf_space, dxpl_id, reclaim_buf) < 0)
+        if(H5D_vlen_reclaim(tid_mem, buf_space, reclaim_buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to reclaim variable-length data")
     } /* end if */
     else if(H5T_get_class(dt_src, FALSE) == H5T_REFERENCE) {
@@ -559,7 +563,7 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src, H5F_t *f_dst
                 ref_count = storage_src->size / H5T_get_size(dt_src);
 
                 /* Copy objects referenced in source buffer to destination file and set destination elements */
-                if(H5O_copy_expand_ref(f_src, storage_src->buf, dxpl_id, f_dst,
+                if(H5O_copy_expand_ref(f_src, storage_src->buf, f_dst,
                         storage_dst->buf, ref_count, H5T_get_ref_type(dt_src), cpy_info) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "unable to copy reference attribute")
             } /* end if */
diff --git a/src/H5Dcontig.c b/src/H5Dcontig.c
index 28a7691..ad12ba0 100644
--- a/src/H5Dcontig.c
+++ b/src/H5Dcontig.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -33,17 +31,19 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Dpkg.h"		/* Dataset functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* Files				*/
-#include "H5FDprivate.h"	/* File drivers				*/
-#include "H5FLprivate.h"	/* Free Lists                           */
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MFprivate.h"	/* File memory management		*/
-#include "H5Oprivate.h"		/* Object headers		  	*/
-#include "H5Pprivate.h"		/* Property lists			*/
-#include "H5VMprivate.h"		/* Vector and array functions		*/
+#include "H5private.h"      /* Generic Functions            */
+#include "H5CXprivate.h"    /* API Contexts                 */
+#include "H5Dpkg.h"         /* Dataset functions            */
+#include "H5Eprivate.h"     /* Error handling               */
+#include "H5Fprivate.h"     /* Files                        */
+#include "H5FDprivate.h"    /* File drivers                 */
+#include "H5FLprivate.h"    /* Free Lists                   */
+#include "H5Iprivate.h"     /* IDs                          */
+#include "H5MFprivate.h"    /* File memory management       */
+#include "H5FOprivate.h"    /* File objects                 */
+#include "H5Oprivate.h"     /* Object headers               */
+#include "H5Pprivate.h"     /* Property lists               */
+#include "H5VMprivate.h"    /* Vector and array functions   */
 
 
 /****************/
@@ -61,7 +61,6 @@ typedef struct H5D_contig_readvv_sieve_ud_t {
     H5D_rdcdc_t *dset_contig;   /* Cached information about contiguous data */
     const H5D_contig_storage_t *store_contig;    /* Contiguous storage info for this I/O operation */
     unsigned char *rbuf;        /* Pointer to buffer to fill */
-    hid_t dxpl_id;              /* DXPL for operation */
 } H5D_contig_readvv_sieve_ud_t;
 
 /* Callback info for [plain] readvv operation */
@@ -69,7 +68,6 @@ typedef struct H5D_contig_readvv_ud_t {
     H5F_t *file;                /* File for dataset */
     haddr_t dset_addr;          /* Address of dataset */
     unsigned char *rbuf;        /* Pointer to buffer to fill */
-    hid_t dxpl_id;              /* DXPL for operation */
 } H5D_contig_readvv_ud_t;
 
 /* Callback info for sieve buffer writevv operation */
@@ -78,7 +76,6 @@ typedef struct H5D_contig_writevv_sieve_ud_t {
     H5D_rdcdc_t *dset_contig;   /* Cached information about contiguous data */
     const H5D_contig_storage_t *store_contig;    /* Contiguous storage info for this I/O operation */
     const unsigned char *wbuf;  /* Pointer to buffer to write */
-    hid_t dxpl_id;              /* DXPL for operation */
 } H5D_contig_writevv_sieve_ud_t;
 
 /* Callback info for [plain] writevv operation */
@@ -86,7 +83,6 @@ typedef struct H5D_contig_writevv_ud_t {
     H5F_t *file;                /* File for dataset */
     haddr_t dset_addr;          /* Address of dataset */
     const unsigned char *wbuf;  /* Pointer to buffer to write */
-    hid_t dxpl_id;              /* DXPL for operation */
 } H5D_contig_writevv_ud_t;
 
 
@@ -96,8 +92,7 @@ typedef struct H5D_contig_writevv_ud_t {
 
 /* Layout operation callbacks */
 static herr_t H5D__contig_construct(H5F_t *f, H5D_t *dset);
-static herr_t H5D__contig_init(H5F_t *f, hid_t dxpl_id, const H5D_t *dset,
-    hid_t dapl_id);
+static herr_t H5D__contig_init(H5F_t *f, const H5D_t *dset, hid_t dapl_id);
 static herr_t H5D__contig_io_init(const H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     hsize_t nelmts, const H5S_t *file_space, const H5S_t *mem_space,
     H5D_chunk_map_t *cm);
@@ -107,7 +102,7 @@ static ssize_t H5D__contig_readvv(const H5D_io_info_t *io_info,
 static ssize_t H5D__contig_writevv(const H5D_io_info_t *io_info,
     size_t dset_max_nseq, size_t *dset_curr_seq, size_t dset_len_arr[], hsize_t dset_offset_arr[],
     size_t mem_max_nseq, size_t *mem_curr_seq, size_t mem_len_arr[], hsize_t mem_offset_arr[]);
-static herr_t H5D__contig_flush(H5D_t *dset, hid_t dxpl_id);
+static herr_t H5D__contig_flush(H5D_t *dset);
 
 /* Helper routines */
 static herr_t H5D__contig_write_one(H5D_io_info_t *io_info, hsize_t offset,
@@ -163,7 +158,7 @@ H5FL_BLK_EXTERN(type_conv);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__contig_alloc(H5F_t *f, hid_t dxpl_id, H5O_storage_contig_t *storage /*out */ )
+H5D__contig_alloc(H5F_t *f, H5O_storage_contig_t *storage /*out */ )
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
@@ -174,7 +169,7 @@ H5D__contig_alloc(H5F_t *f, hid_t dxpl_id, H5O_storage_contig_t *storage /*out *
     HDassert(storage);
 
     /* Allocate space for the contiguous data */
-    if(HADDR_UNDEF == (storage->addr = H5MF_alloc(f, H5FD_MEM_DRAW, dxpl_id, storage->size)))
+    if(HADDR_UNDEF == (storage->addr = H5MF_alloc(f, H5FD_MEM_DRAW, storage->size)))
         HGOTO_ERROR(H5E_IO, H5E_NOSPACE, FAIL, "unable to reserve file space")
 
 done:
@@ -200,11 +195,10 @@ H5D__contig_fill(const H5D_io_info_t *io_info)
     const H5D_t *dset = io_info->dset;   /* the dataset pointer */
     H5D_io_info_t ioinfo;       /* Dataset I/O info */
     H5D_storage_t store;        /* Union of storage info for dataset */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     hssize_t    snpoints;       /* Number of points in space (for error checking) */
     size_t      npoints;        /* Number of points in space */
     hsize_t	offset;         /* Offset of dataset */
+    size_t      max_temp_buf;   /* Maximum size of temporary buffer */
 #ifdef H5_HAVE_PARALLEL
     MPI_Comm	mpi_comm = MPI_COMM_NULL;	/* MPI communicator for file */
     int         mpi_rank = (-1);  /* This process's rank  */
@@ -212,8 +206,6 @@ H5D__contig_fill(const H5D_io_info_t *io_info)
     hbool_t     blocks_written = FALSE; /* Flag to indicate that chunk was actually written */
     hbool_t     using_mpi = FALSE;      /* Flag to indicate that the file is being accessed with an MPI-capable file driver */
 #endif /* H5_HAVE_PARALLEL */
-    hid_t       md_dxpl_id = io_info->md_dxpl_id;
-    hid_t       raw_dxpl_id = io_info->raw_dxpl_id;
     H5D_fill_buf_info_t fb_info;        /* Dataset's fill buffer info */
     hbool_t     fb_info_init = FALSE;   /* Whether the fill value buffer has been initialized */
     herr_t	ret_value = SUCCEED;	/* Return value */
@@ -221,8 +213,6 @@ H5D__contig_fill(const H5D_io_info_t *io_info)
     FUNC_ENTER_PACKAGE
 
     /* Check args */
-    HDassert(TRUE == H5P_isa_class(md_dxpl_id, H5P_DATASET_XFER));
-    HDassert(TRUE == H5P_isa_class(raw_dxpl_id, H5P_DATASET_XFER));
     HDassert(dset && H5D_CONTIGUOUS == dset->shared->layout.type);
     HDassert(H5F_addr_defined(dset->shared->layout.storage.u.contig.addr));
     HDassert(dset->shared->layout.storage.u.contig.size > 0);
@@ -245,10 +235,6 @@ H5D__contig_fill(const H5D_io_info_t *io_info)
     } /* end if */
 #endif  /* H5_HAVE_PARALLEL */
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(raw_dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Initialize storage info for this dataset */
     store.contig.dset_addr = dset->shared->layout.storage.u.contig.addr;
     store.contig.dset_size = dset->shared->layout.storage.u.contig.size;
@@ -258,11 +244,14 @@ H5D__contig_fill(const H5D_io_info_t *io_info)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "dataset has negative number of elements")
     H5_CHECKED_ASSIGN(npoints, size_t, snpoints, hssize_t);
 
+    /* Get the maximum size of temporary buffers */
+    if(H5CX_get_max_temp_buf(&max_temp_buf) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve max. temp. buf size")
+
     /* Initialize the fill value buffer */
     if(H5D__fill_init(&fb_info, NULL, NULL, NULL, NULL, NULL,
             &dset->shared->dcpl_cache.fill,
-            dset->shared->type, dset->shared->type_id, npoints,
-            dxpl_cache->max_temp_buf, md_dxpl_id) < 0)
+            dset->shared->type, dset->shared->type_id, npoints, max_temp_buf) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize fill buffer info")
     fb_info_init = TRUE;
 
@@ -270,7 +259,7 @@ H5D__contig_fill(const H5D_io_info_t *io_info)
     offset = 0;
 
     /* Simple setup for dataset I/O info struct */
-    H5D_BUILD_IO_INFO_WRT(&ioinfo, dset, dxpl_cache, H5AC_ind_read_dxpl_id, raw_dxpl_id, &store, fb_info.fill_buf);
+    H5D_BUILD_IO_INFO_WRT(&ioinfo, dset, &store, fb_info.fill_buf);
 
     /*
      * Fill the entire current extent with the fill value.  We can do
@@ -290,7 +279,7 @@ H5D__contig_fill(const H5D_io_info_t *io_info)
         /* Check for VL datatype & non-default fill value */
         if(fb_info.has_vlen_fill_type)
             /* Re-fill the buffer to use for this I/O operation */
-            if(H5D__fill_refill_vl(&fb_info, curr_points, md_dxpl_id) < 0)
+            if(H5D__fill_refill_vl(&fb_info, curr_points) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "can't refill fill value buffer")
 
 #ifdef H5_HAVE_PARALLEL
@@ -353,7 +342,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__contig_delete(H5F_t *f, hid_t dxpl_id, const H5O_storage_t *storage)
+H5D__contig_delete(H5F_t *f, const H5O_storage_t *storage)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
@@ -364,7 +353,7 @@ H5D__contig_delete(H5F_t *f, hid_t dxpl_id, const H5O_storage_t *storage)
     HDassert(storage);
 
     /* Free the file space for the chunk */
-    if(H5MF_xfree(f, H5FD_MEM_DRAW, dxpl_id, storage->u.contig.addr, storage->u.contig.size) < 0)
+    if(H5MF_xfree(f, H5FD_MEM_DRAW, storage->u.contig.addr, storage->u.contig.size) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to free contiguous storage space")
 
 done:
@@ -460,8 +449,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__contig_init(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    const H5D_t *dset, hid_t H5_ATTR_UNUSED dapl_id)
+H5D__contig_init(H5F_t H5_ATTR_UNUSED *f, const H5D_t *dset,
+    hid_t H5_ATTR_UNUSED dapl_id)
 {
     hsize_t tmp_size;                   /* Temporary holder for raw data size */
     size_t tmp_sieve_buf_size;          /* Temporary holder for sieve buffer size */
@@ -735,7 +724,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
     if(NULL == dset_contig->sieve_buf) {
         /* Check if we can actually hold the I/O request in the sieve buffer */
         if(len > dset_contig->sieve_buf_size) {
-            if(H5F_block_read(file, H5FD_MEM_DRAW, addr, len, udata->dxpl_id, buf) < 0)
+            if(H5F_block_read(file, H5FD_MEM_DRAW, addr, len, buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
         } /* end if */
         else {
@@ -758,7 +747,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
             H5_CHECKED_ASSIGN(dset_contig->sieve_size, size_t, min, hsize_t);
 
             /* Read the new sieve buffer */
-            if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+            if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, dset_contig->sieve_buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
 
             /* Grab the data out of the buffer (must be first piece of data in buffer ) */
@@ -794,7 +783,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                     /* Flush the sieve buffer, if it's dirty */
                     if(dset_contig->sieve_dirty) {
                         /* Write to file */
-                        if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+                        if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, dset_contig->sieve_buf) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
 
                         /* Reset sieve buffer dirty flag */
@@ -803,7 +792,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                 } /* end if */
 
                 /* Read directly into the user's buffer */
-                if(H5F_block_read(file, H5FD_MEM_DRAW, addr, len, udata->dxpl_id, buf) < 0)
+                if(H5F_block_read(file, H5FD_MEM_DRAW, addr, len, buf) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
             } /* end if */
             /* Element size fits within the buffer size */
@@ -811,7 +800,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                 /* Flush the sieve buffer if it's dirty */
                 if(dset_contig->sieve_dirty) {
                     /* Write to file */
-                    if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+                    if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, dset_contig->sieve_buf) < 0)
                         HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
 
                     /* Reset sieve buffer dirty flag */
@@ -842,7 +831,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                 sieve_end = sieve_start + sieve_size;
 
                 /* Read the new sieve buffer */
-                if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+                if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, dset_contig->sieve_buf) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
 
                 /* Grab the data out of the buffer (must be first piece of data in buffer ) */
@@ -881,7 +870,7 @@ H5D__contig_readvv_cb(hsize_t dst_off, hsize_t src_off, size_t len, void *_udata
 
     /* Write data */
     if(H5F_block_read(udata->file, H5FD_MEM_DRAW, (udata->dset_addr + dst_off),
-            len, udata->dxpl_id, (udata->rbuf + src_off)) < 0)
+            len, (udata->rbuf + src_off)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
 
 done:
@@ -934,7 +923,6 @@ H5D__contig_readvv(const H5D_io_info_t *io_info,
         udata.dset_contig = &(io_info->dset->shared->cache.contig);
         udata.store_contig = &(io_info->store->contig);
         udata.rbuf = (unsigned char *)io_info->u.rbuf;
-        udata.dxpl_id = io_info->raw_dxpl_id;
 
         /* Call generic sequence operation routine */
         if((ret_value = H5VM_opvv(dset_max_nseq, dset_curr_seq, dset_len_arr, dset_off_arr,
@@ -949,7 +937,6 @@ H5D__contig_readvv(const H5D_io_info_t *io_info,
         udata.file = io_info->dset->oloc.file;
         udata.dset_addr = io_info->store->contig.dset_addr;
         udata.rbuf = (unsigned char *)io_info->u.rbuf;
-        udata.dxpl_id = io_info->raw_dxpl_id;
 
         /* Call generic sequence operation routine */
         if((ret_value = H5VM_opvv(dset_max_nseq, dset_curr_seq, dset_len_arr, dset_off_arr,
@@ -1012,7 +999,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
     if(NULL == dset_contig->sieve_buf) {
         /* Check if we can actually hold the I/O request in the sieve buffer */
         if(len > dset_contig->sieve_buf_size) {
-            if(H5F_block_write(file, H5FD_MEM_DRAW, addr, len, udata->dxpl_id, buf) < 0)
+            if(H5F_block_write(file, H5FD_MEM_DRAW, addr, len, buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
         } /* end if */
         else {
@@ -1041,7 +1028,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
             /* Check if there is any point in reading the data from the file */
             if(dset_contig->sieve_size > len) {
                 /* Read the new sieve buffer */
-                if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+                if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, dset_contig->sieve_buf) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
             } /* end if */
 
@@ -1081,7 +1068,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                     /* Flush the sieve buffer, if it's dirty */
                     if(dset_contig->sieve_dirty) {
                         /* Write to file */
-                        if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+                        if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, dset_contig->sieve_buf) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
 
                         /* Reset sieve buffer dirty flag */
@@ -1094,7 +1081,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                 } /* end if */
 
                 /* Write directly from the user's buffer */
-                if(H5F_block_write(file, H5FD_MEM_DRAW, addr, len, udata->dxpl_id, buf) < 0)
+                if(H5F_block_write(file, H5FD_MEM_DRAW, addr, len, buf) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
             } /* end if */
             /* Element size fits within the buffer size */
@@ -1134,7 +1121,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                     /* Flush the sieve buffer if it's dirty */
                     if(dset_contig->sieve_dirty) {
                         /* Write to file */
-                        if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+                        if(H5F_block_write(file, H5FD_MEM_DRAW, sieve_start, sieve_size, dset_contig->sieve_buf) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
 
                         /* Reset sieve buffer dirty flag */
@@ -1167,7 +1154,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                     /* Check if there is any point in reading the data from the file */
                     if(dset_contig->sieve_size > len) {
                         /* Read the new sieve buffer */
-                        if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, udata->dxpl_id, dset_contig->sieve_buf) < 0)
+                        if(H5F_block_read(file, H5FD_MEM_DRAW, dset_contig->sieve_loc, dset_contig->sieve_size, dset_contig->sieve_buf) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
                     } /* end if */
 
@@ -1207,7 +1194,7 @@ H5D__contig_writevv_cb(hsize_t dst_off, hsize_t src_off, size_t len, void *_udat
     FUNC_ENTER_STATIC
 
     /* Write data */
-    if(H5F_block_write(udata->file, H5FD_MEM_DRAW, (udata->dset_addr + dst_off), len, udata->dxpl_id, (udata->wbuf + src_off)) < 0)
+    if(H5F_block_write(udata->file, H5FD_MEM_DRAW, (udata->dset_addr + dst_off), len, (udata->wbuf + src_off)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "block write failed")
 
 done:
@@ -1260,7 +1247,6 @@ H5D__contig_writevv(const H5D_io_info_t *io_info,
         udata.dset_contig = &(io_info->dset->shared->cache.contig);
         udata.store_contig = &(io_info->store->contig);
         udata.wbuf = (const unsigned char *)io_info->u.wbuf;
-        udata.dxpl_id = io_info->raw_dxpl_id;
 
         /* Call generic sequence operation routine */
         if((ret_value = H5VM_opvv(dset_max_nseq, dset_curr_seq, dset_len_arr, dset_off_arr,
@@ -1275,7 +1261,6 @@ H5D__contig_writevv(const H5D_io_info_t *io_info,
         udata.file = io_info->dset->oloc.file;
         udata.dset_addr = io_info->store->contig.dset_addr;
         udata.wbuf = (const unsigned char *)io_info->u.wbuf;
-        udata.dxpl_id = io_info->raw_dxpl_id;
 
         /* Call generic sequence operation routine */
         if((ret_value = H5VM_opvv(dset_max_nseq, dset_curr_seq, dset_len_arr, dset_off_arr,
@@ -1302,7 +1287,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__contig_flush(H5D_t *dset, hid_t H5_ATTR_UNUSED dxpl_id)
+H5D__contig_flush(H5D_t *dset)
 {
     herr_t ret_value = SUCCEED;       /* Return value */
 
@@ -1311,9 +1296,8 @@ H5D__contig_flush(H5D_t *dset, hid_t H5_ATTR_UNUSED dxpl_id)
     /* Sanity check */
     HDassert(dset);
 
-    /* Flush any data in sieve buffer - use the raw data dxpl since
-       the one passed in is a metadata dxpl. */
-    if(H5D__flush_sieve_buf(dset, H5AC_rawdata_dxpl_id) < 0)
+    /* Flush any data in sieve buffer */
+    if(H5D__flush_sieve_buf(dset) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to flush sieve buffer")
 
 done:
@@ -1336,7 +1320,7 @@ done:
 herr_t
 H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
     H5F_t *f_dst, H5O_storage_contig_t *storage_dst, H5T_t *dt_src,
-    H5O_copy_t *cpy_info, hid_t dxpl_id)
+    H5O_copy_t *cpy_info)
 {
     haddr_t     addr_src;               /* File offset in source dataset */
     haddr_t     addr_dst;               /* File offset in destination dataset */
@@ -1364,6 +1348,10 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
     hsize_t     buf_dim[1] = {0};       /* Dimension for buffer */
     hbool_t     is_vlen = FALSE;        /* Flag to indicate that VL type conversion should occur */
     hbool_t     fix_ref = FALSE;        /* Flag to indicate that ref values should be fixed */
+    H5D_shared_t    *shared_fo = (H5D_shared_t *)cpy_info->shared_fo;  /* Pointer to the shared struct for dataset object */
+    hbool_t     try_sieve = FALSE;      /* Try to get data from the sieve buffer */
+    haddr_t     sieve_start = HADDR_UNDEF; /* Start location of sieve buffer */
+    haddr_t     sieve_end = HADDR_UNDEF;    /* End locations of sieve buffer */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -1376,7 +1364,7 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
     HDassert(dt_src);
 
     /* Allocate space for destination raw data */
-    if(H5D__contig_alloc(f_dst, dxpl_id, storage_dst) < 0)
+    if(H5D__contig_alloc(f_dst, storage_dst) < 0)
         HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to allocate contiguous storage")
 
     /* Set up number of bytes to copy, and initial buffer size */
@@ -1397,7 +1385,7 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
         if(NULL == (dt_mem = H5T_copy(dt_src, H5T_COPY_TRANSIENT)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy")
         if((tid_mem = H5I_register(H5I_DATATYPE, dt_mem, FALSE)) < 0) {
-            H5T_close(dt_mem);
+            (void)H5T_close_real(dt_mem);
             HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register memory datatype")
         } /* end if */
 
@@ -1405,18 +1393,18 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
         if(NULL == (dt_dst = H5T_copy(dt_src, H5T_COPY_TRANSIENT)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to copy")
         if(H5T_set_loc(dt_dst, f_dst, H5T_LOC_DISK) < 0) {
-            H5T_close(dt_dst);
+            (void)H5T_close_real(dt_dst);
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "cannot mark datatype on disk")
         } /* end if */
         if((tid_dst = H5I_register(H5I_DATATYPE, dt_dst, FALSE)) < 0) {
-            H5T_close(dt_dst);
+            (void)H5T_close_real(dt_dst);
             HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register destination file datatype")
         } /* end if */
 
         /* Set up the conversion functions */
-        if(NULL == (tpath_src_mem = H5T_path_find(dt_src, dt_mem, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath_src_mem = H5T_path_find(dt_src, dt_mem)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to convert between src and mem datatypes")
-        if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, dt_dst, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath_mem_dst = H5T_path_find(dt_mem, dt_dst)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to convert between mem and dst datatypes")
 
         /* Determine largest datatype size */
@@ -1487,6 +1475,16 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
     /* Loop over copying data */
     addr_src = storage_src->addr;
     addr_dst = storage_dst->addr;
+
+    /* If data sieving is enabled and the dataset is open in the file,
+       set up to copy data out of the sieve buffer if deemed possible later */
+    if(H5F_HAS_FEATURE(f_src, H5FD_FEAT_DATA_SIEVE) &&
+       shared_fo && shared_fo->cache.contig.sieve_buf) {
+        try_sieve = TRUE;
+        sieve_start = shared_fo->cache.contig.sieve_loc;
+        sieve_end = sieve_start + shared_fo->cache.contig.sieve_size;
+    }
+
     while(total_src_nbytes > 0) {
         /* Check if we should reduce the number of bytes to transfer */
         if(total_src_nbytes < src_nbytes) {
@@ -1512,14 +1510,20 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
                 dst_nbytes = mem_nbytes = src_nbytes;
         } /* end if */
 
-        /* Read raw data from source file - use raw dxpl because passed in one is metadata */
-        if(H5F_block_read(f_src, H5FD_MEM_DRAW, addr_src, src_nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "unable to read raw data")
+        /* If the entire copy is within the sieve buffer, copy data from the sieve buffer */
+        if(try_sieve && (addr_src >= sieve_start) && ((addr_src + src_nbytes -1) < sieve_end)) {
+            unsigned char *base_sieve_buf = shared_fo->cache.contig.sieve_buf + (addr_src - sieve_start);
+
+            HDmemcpy(buf, base_sieve_buf, src_nbytes);
+        } else
+            /* Read raw data from source file */
+            if(H5F_block_read(f_src, H5FD_MEM_DRAW, addr_src, src_nbytes, buf) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "unable to read raw data")
 
         /* Perform datatype conversion, if necessary */
         if(is_vlen) {
             /* Convert from source file to memory */
-	    if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, bkg, dxpl_id) < 0)
+            if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, bkg) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
             /* Copy into another buffer, to reclaim memory later */
@@ -1529,13 +1533,13 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
             HDmemset(bkg, 0, buf_size);
 
             /* Convert from memory to destination file */
-	    if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg, dxpl_id) < 0)
+            if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
             /* Reclaim space from variable length data */
-            if(H5D_vlen_reclaim(tid_mem, buf_space, dxpl_id, reclaim_buf) < 0)
+            if(H5D_vlen_reclaim(tid_mem, buf_space, reclaim_buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to reclaim variable-length data")
-	} /* end if */
+        } /* end if */
         else if(fix_ref) {
             /* Check for expanding references */
             if(cpy_info->expand_ref) {
@@ -1545,7 +1549,7 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
                 ref_count = src_nbytes / H5T_get_size(dt_src);
 
                 /* Copy the reference elements */
-                if(H5O_copy_expand_ref(f_src, buf, dxpl_id, f_dst, bkg, ref_count, H5T_get_ref_type(dt_src), cpy_info) < 0)
+                if(H5O_copy_expand_ref(f_src, buf, f_dst, bkg, ref_count, H5T_get_ref_type(dt_src), cpy_info) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "unable to copy reference attribute")
 
                 /* After fix ref, copy the new reference elements to the buffer to write out */
@@ -1556,8 +1560,8 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
                 HDmemset(buf, 0, src_nbytes);
         } /* end if */
 
-        /* Write raw data to destination file - use raw dxpl because passed in one is metadata */
-        if(H5F_block_write(f_dst, H5FD_MEM_DRAW, addr_dst, dst_nbytes, H5AC_rawdata_dxpl_id, buf) < 0)
+        /* Write raw data to destination file */
+        if(H5F_block_write(f_dst, H5FD_MEM_DRAW, addr_dst, dst_nbytes, buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to write raw data")
 
         /* Adjust loop variables */
diff --git a/src/H5Ddbg.c b/src/H5Ddbg.c
index a6c130e..347e34c 100644
--- a/src/H5Ddbg.c
+++ b/src/H5Ddbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -24,6 +22,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Datasets 				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -90,7 +89,7 @@ H5Ddebug(hid_t dset_id)
 
     /* Print B-tree information */
     if(H5D_CHUNKED == dset->shared->layout.type)
-	(void)H5D__chunk_dump_index(dset, H5AC_ind_read_dxpl_id, stdout);
+	(void)H5D__chunk_dump_index(dset, stdout);
     else if(H5D_CONTIGUOUS == dset->shared->layout.type)
 	HDfprintf(stdout, "    %-10s %a\n", "Address:", dset->shared->layout.storage.u.contig.addr);
 
diff --git a/src/H5Ddeprec.c b/src/H5Ddeprec.c
index f4c6797..0f1bfee 100644
--- a/src/H5Ddeprec.c
+++ b/src/H5Ddeprec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -38,6 +36,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Datasets 				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -62,10 +61,6 @@
 /* Local Prototypes */
 /********************/
 
-#ifndef H5_NO_DEPRECATED_SYMBOLS
-static herr_t H5D__extend(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id);
-#endif /* H5_NO_DEPRECATED_SYMBOLS */
-
 
 /*********************/
 /* Package Variables */
@@ -120,6 +115,7 @@ H5Dcreate1(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
     H5G_loc_t	    loc;                /* Object location to insert dataset into */
     H5D_t	   *dset = NULL;        /* New dataset's info */
     const H5S_t    *space;              /* Dataspace for dataset */
+    hid_t           dapl_id = H5P_DEFAULT;   /* DAPL used by library */
     hid_t           ret_value;          /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -140,8 +136,12 @@ H5Dcreate1(hid_t loc_id, const char *name, hid_t type_id, hid_t space_id,
         if(TRUE != H5P_isa_class(dcpl_id, H5P_DATASET_CREATE))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not dataset create property list ID")
 
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&dapl_id, H5P_CLS_DACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
+
     /* Build and open the new dataset */
-    if(NULL == (dset = H5D__create_named(&loc, name, type_id, space, H5P_LINK_CREATE_DEFAULT, dcpl_id, H5P_DATASET_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)))
+    if(NULL == (dset = H5D__create_named(&loc, name, type_id, space, H5P_LINK_CREATE_DEFAULT, dcpl_id, dapl_id)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to create dataset")
 
     /* Register the new dataset to get an ID for it */
@@ -179,7 +179,7 @@ H5Dopen1(hid_t loc_id, const char *name)
 {
     H5D_t       *dset = NULL;
     H5G_loc_t   loc;                    /* Object location of group */
-    hid_t       ret_value;
+    hid_t       ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("i", "i*s", loc_id, name);
@@ -191,7 +191,7 @@ H5Dopen1(hid_t loc_id, const char *name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
     /* Open the dataset */
-    if(NULL == (dset = H5D__open_name(&loc, name, H5P_DATASET_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)))
+    if(NULL == (dset = H5D__open_name(&loc, name, H5P_DATASET_ACCESS_DEFAULT)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open dataset")
 
     /* Register an atom for the dataset */
@@ -226,8 +226,10 @@ done:
 herr_t
 H5Dextend(hid_t dset_id, const hsize_t size[])
 {
-    H5D_t	*dset;
-    herr_t       ret_value = SUCCEED;  /* Return value */
+    H5D_t	*dset;                  /* Pointer to dataset to modify */
+    hsize_t     dset_dims[H5S_MAX_RANK]; /* Current dataset dimensions */
+    unsigned    u;                      /* Local index variable */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("e", "i*h", dset_id, size);
@@ -238,143 +240,24 @@ H5Dextend(hid_t dset_id, const hsize_t size[])
     if(!size)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no size specified")
 
+    /* Make certain that the dataset dimensions don't decrease */
+    /* (Shrinking dimensions is possible with H5Dset_extent, but not H5Dextend) */
+    if(H5S_get_simple_extent_dims(dset->shared->space, dset_dims, NULL) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
+    for(u = 0; u < dset->shared->ndims; u++)
+        if(size[u] > dset_dims[u])
+            dset_dims[u] = size[u];
+
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(dset_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Increase size */
-    if(H5D__extend(dset, size, H5AC_ind_read_dxpl_id) < 0)
+    if(H5D__set_extent(dset, dset_dims) < 0)
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to extend dataset")
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Dextend() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5D__extend
- *
- * Purpose:	Increases the size of a dataset.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		Friday, January 30, 1998
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5D__extend(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id)
-{
-    htri_t changed;                     /* Flag to indicate that the dataspace was successfully extended */
-    hsize_t old_dims[H5S_MAX_RANK];     /* Current (i.e. old, if changed) dimension sizes */
-    H5O_fill_t *fill;                   /* Dataset's fill value */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check args */
-    HDassert(dataset);
-    HDassert(size);
-
-    /* Check if the filters in the DCPL will need to encode, and if so, can they? */
-    if(H5D__check_filters(dataset) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't apply filters")
-
-    /*
-     * NOTE: Restrictions on extensions were checked when the dataset was
-     *	     created.  All extensions are allowed here since none should be
-     *	     able to muck things up.
-     */
-
-    /* Retrieve the current dimensions */
-    HDcompile_assert(sizeof(old_dims) == sizeof(dataset->shared->curr_dims));
-    HDmemcpy(old_dims, dataset->shared->curr_dims, H5S_MAX_RANK * sizeof(old_dims[0]));
-
-    /* Increase the size of the dataspace */
-    if((changed = H5S_extend(dataset->shared->space, size)) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to increase size of dataspace")
-
-    /* Updated the dataset's info if the dataspace was successfully extended */
-    if(changed) {
-        /* Get the extended dimension sizes */
-        /* (Need to retrieve this here, since the 'size' dimensions could
-         *  extend one dimension but be smaller in a different dimension,
-         *  and the dataspace's extent is the larger of the current and
-         *  'size' dimension values. - QAK)
-         */
-        if(H5S_get_simple_extent_dims(dataset->shared->space, dataset->shared->curr_dims, NULL) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
-
-        /* Update the index values for the cached chunks for this dataset */
-        if(H5D_CHUNKED == dataset->shared->layout.type) {
-            hbool_t update_chunks = FALSE;  /* Flag to indicate chunk cache update is needed */
-
-            /* Check if we need to track & update scaled dimension information */
-            if(dataset->shared->ndims > 1) {
-                unsigned u;         /* Local indicate variable */
-
-                /* Update scaled chunk information */
-                for(u = 0; u < dataset->shared->ndims; u++) {
-                    hsize_t scaled;             /* Scaled value */
-
-                    /* Compute the scaled dimension size value */
-                    scaled = size[u] / dataset->shared->layout.u.chunk.dim[u];
-
-                    /* Check if scaled dimension size changed */
-                    if(scaled != dataset->shared->cache.chunk.scaled_dims[u]) {
-                        hsize_t scaled_power2up;      /* New size value, rounded to next power of 2 */
-
-                        /* Update the scaled dimension size value for the current dimension */
-                        dataset->shared->cache.chunk.scaled_dims[u] = scaled;
-
-                        /* Check if algorithm for computing hash values will change */
-                        if((scaled > dataset->shared->cache.chunk.nslots &&
-                                    dataset->shared->cache.chunk.scaled_dims[u] <= dataset->shared->cache.chunk.nslots)
-                                || (scaled <= dataset->shared->cache.chunk.nslots &&
-                                    dataset->shared->cache.chunk.scaled_dims[u] > dataset->shared->cache.chunk.nslots))
-                            update_chunks = TRUE;
-
-                        /* Check if the number of bits required to encode the scaled size value changed */
-                        if(dataset->shared->cache.chunk.scaled_power2up[u] != (scaled_power2up = H5VM_power2up(scaled))) {
-                            /* Update the 'power2up' & 'encode_bits' values for the current dimension */
-                            dataset->shared->cache.chunk.scaled_power2up[u] = scaled_power2up;
-                            dataset->shared->cache.chunk.scaled_encode_bits[u] = H5VM_log2_gen(scaled_power2up);
-
-                            /* Indicate that the chunk cache indices should be updated */
-                            update_chunks = TRUE;
-                        } /* end if */
-                    } /* end if */
-                } /* end for */
-            } /* end if */
-
-            /* Update general information for chunks */
-            if(H5D__chunk_set_info(dataset) < 0)
-                HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to update # of chunks")
-
-            /* Check for updating chunk cache indices */
-            if(update_chunks) {
-                /* Update the chunk cache indices */
-                if(H5D__chunk_update_cache(dataset, dxpl_id) < 0)
-                    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update cached chunk indices")
-            } /* end if */
-        } /* end if */
-
-	/* Allocate space for the new parts of the dataset, if appropriate */
-        fill = &dataset->shared->dcpl_cache.fill;
-        if(fill->alloc_time == H5D_ALLOC_TIME_EARLY) {
-            H5D_io_info_t io_info;
-
-            io_info.dset = dataset;
-            io_info.raw_dxpl_id = H5AC_rawdata_dxpl_id;
-            io_info.md_dxpl_id = dxpl_id;
-
-            if(H5D__alloc_storage(&io_info, H5D_ALLOC_EXTEND, FALSE, old_dims) < 0)
-                HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize dataset with fill value")
-        }
-        /* Mark the dataspace as dirty, for later writing to the file */
-        if(H5D__mark(dataset, dxpl_id, H5D_MARK_SPACE) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to mark dataspace as dirty")
-    } /* end if */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D__extend() */
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
diff --git a/src/H5Dearray.c b/src/H5Dearray.c
index e9dbd0d..a20145a 100644
--- a/src/H5Dearray.c
+++ b/src/H5Dearray.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer: 	Quincey Koziol <koziol@hdfgroup.org>
@@ -67,12 +65,6 @@ typedef struct H5D_earray_ctx_t {
     size_t chunk_size_len;      /* Size of chunk sizes in the file (bytes) */
 } H5D_earray_ctx_t;
 
-/* User data for chunk callbacks */
-typedef struct H5D_earray_ud_t {
-    H5F_t *f;                   /* File pointer for operation */
-    hid_t dxpl_id;              /* DXPL ID for operation */
-} H5D_earray_ud_t;
-
 /* Extensible Array callback info for iteration over chunks */
 typedef struct H5D_earray_it_ud_t {
     H5D_chunk_common_ud_t common;       /* Common info for Fixed Array user data (must be first) */
@@ -107,7 +99,7 @@ static herr_t H5D__earray_decode(const void *raw, void *elmt, size_t nelmts,
     void *ctx);
 static herr_t H5D__earray_debug(FILE *stream, int indent, int fwidth,
     hsize_t idx, const void *elmt);
-static void *H5D__earray_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr);
+static void *H5D__earray_crt_dbg_context(H5F_t *f, haddr_t obj_addr);
 static herr_t H5D__earray_dst_dbg_context(void *dbg_ctx);
 
 /* Extensible array class callbacks for chunks w/filters */
@@ -138,7 +130,7 @@ static herr_t H5D__earray_idx_delete(const H5D_chk_idx_info_t *idx_info);
 static herr_t H5D__earray_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     const H5D_chk_idx_info_t *idx_info_dst);
 static herr_t H5D__earray_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id);
+    H5O_storage_chunk_t *storage_dst);
 static herr_t H5D__earray_idx_size(const H5D_chk_idx_info_t *idx_info,
     hsize_t *size);
 static herr_t H5D__earray_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr);
@@ -626,7 +618,7 @@ H5D__earray_filt_debug(FILE *stream, int indent, int fwidth, hsize_t idx,
  *-------------------------------------------------------------------------
  */
 static void *
-H5D__earray_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr)
+H5D__earray_crt_dbg_context(H5F_t *f, haddr_t obj_addr)
 {
     H5D_earray_ctx_ud_t	*dbg_ctx = NULL;   /* Context for fixed array callback */
     H5O_loc_t obj_loc;          /* Pointer to an object's location */
@@ -655,7 +647,7 @@ H5D__earray_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr)
     obj_opened = TRUE;
 
     /* Read the layout message */
-    if(NULL == H5O_msg_read(&obj_loc, H5O_LAYOUT_ID, &layout, dxpl_id))
+    if(NULL == H5O_msg_read(&obj_loc, H5O_LAYOUT_ID, &layout))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, NULL, "can't get layout info")
 
     /* close the object header */
@@ -677,10 +669,9 @@ done:
             dbg_ctx = H5FL_FREE(H5D_earray_ctx_ud_t, dbg_ctx);
 
         /* Close object header */
-        if(obj_opened) {
+        if(obj_opened)
             if(H5O_close(&obj_loc, NULL) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, NULL, "can't close object header")
-        } /* end if */
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -759,7 +750,7 @@ H5D__earray_idx_depend(const H5D_chk_idx_info_t *idx_info)
     oloc.addr = idx_info->storage->u.earray.dset_ohdr_addr;
 
     /* Get header */
-    if(NULL == (oh = H5O_protect(&oloc, idx_info->dxpl_id, H5AC__READ_ONLY_FLAG, TRUE)))
+    if(NULL == (oh = H5O_protect(&oloc, H5AC__READ_ONLY_FLAG, TRUE)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Retrieve the dataset's object header proxy */
@@ -767,12 +758,12 @@ H5D__earray_idx_depend(const H5D_chk_idx_info_t *idx_info)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get dataset object header proxy")
 
     /* Make the extensible array a child flush dependency of the dataset's object header */
-    if(H5EA_depend(idx_info->storage->u.earray.ea, idx_info->dxpl_id, oh_proxy) < 0)
+    if(H5EA_depend(idx_info->storage->u.earray.ea, oh_proxy) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTDEPEND, FAIL, "unable to create flush dependency on object header proxy")
 
 done:
     /* Release the object header from the cache */
-    if(oh && H5O_unprotect(&oloc, idx_info->dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(&oloc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_DATASET, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -821,7 +812,7 @@ H5D__earray_idx_open(const H5D_chk_idx_info_t *idx_info)
     udata.chunk_size = idx_info->layout->size;
 
     /* Open the extensible array for the chunk index */
-    if(NULL == (idx_info->storage->u.earray.ea = H5EA_open(idx_info->f, idx_info->dxpl_id, idx_info->storage->idx_addr, &udata)))
+    if(NULL == (idx_info->storage->u.earray.ea = H5EA_open(idx_info->f, idx_info->storage->idx_addr, &udata)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't open extensible array")
 
     /* Check for SWMR writes to the file */
@@ -972,7 +963,7 @@ H5D__earray_idx_create(const H5D_chk_idx_info_t *idx_info)
     udata.chunk_size = idx_info->layout->size;
 
     /* Create the extensible array for the chunk index */
-    if(NULL == (idx_info->storage->u.earray.ea = H5EA_create(idx_info->f, idx_info->dxpl_id, &cparam, &udata)))
+    if(NULL == (idx_info->storage->u.earray.ea = H5EA_create(idx_info->f, &cparam, &udata)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't create extensible array")
 
     /* Get the address of the extensible array in file */
@@ -1067,12 +1058,12 @@ H5D__earray_idx_insert(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata
 	elmt.filter_mask = udata->filter_mask;
 
 	/* Set the info for the chunk */
-	if(H5EA_set(ea, idx_info->dxpl_id, udata->chunk_idx, &elmt) < 0)
+	if(H5EA_set(ea, udata->chunk_idx, &elmt) < 0)
 	    HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set chunk info")
     } /* end if */
     else {
 	/* Set the address for the chunk */
-	if(H5EA_set(ea, idx_info->dxpl_id, udata->chunk_idx, &udata->chunk_block.offset) < 0)
+	if(H5EA_set(ea, udata->chunk_idx, &udata->chunk_block.offset) < 0)
 	    HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set chunk address")
     } /* end else */
 
@@ -1137,7 +1128,7 @@ H5D__earray_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *uda
         H5VM_swizzle_coords(hsize_t, swizzled_coords, idx_info->layout->u.earray.unlim_dim);
 
         /* Calculate the index of this chunk */
-        idx = H5VM_chunk_index(ndims, swizzled_coords, idx_info->layout->u.earray.swizzled_dim, idx_info->layout->u.earray.swizzled_down_chunks);
+        idx = H5VM_chunk_index(ndims, swizzled_coords, idx_info->layout->u.earray.swizzled_dim, idx_info->layout->u.earray.swizzled_max_down_chunks);
     } /* end if */
     else {
         /* Calculate the index of this chunk */
@@ -1151,7 +1142,7 @@ H5D__earray_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *uda
         H5D_earray_filt_elmt_t elmt;            /* Extensible array element */
 
         /* Get the information for the chunk */
-        if(H5EA_get(ea, idx_info->dxpl_id, idx, &elmt) < 0)
+        if(H5EA_get(ea, idx, &elmt) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk info")
 
         /* Set the info for the chunk */
@@ -1161,7 +1152,7 @@ H5D__earray_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *uda
     } /* end if */
     else {
         /* Get the address for the chunk */
-        if(H5EA_get(ea, idx_info->dxpl_id, idx, &udata->chunk_block.offset) < 0)
+        if(H5EA_get(ea, idx, &udata->chunk_block.offset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk address")
 
         /* Update the other (constant) information for the chunk */
@@ -1202,7 +1193,8 @@ H5D__earray_idx_resize(H5O_layout_chunk_t *layout)
 
     /* "Swizzle" constant dimensions for this dataset */
     if(layout->u.earray.unlim_dim > 0) {
-        hsize_t swizzled_chunks[H5O_LAYOUT_NDIMS];    /* Swizzled form of # of chunks in each dimension */
+        hsize_t swizzled_chunks[H5O_LAYOUT_NDIMS];      /* Swizzled form of # of chunks in each dimension */
+        hsize_t swizzled_max_chunks[H5O_LAYOUT_NDIMS];  /* Swizzled form of max # of chunks in each dimension */
 
         /* Get the swizzled chunk dimensions */
         HDmemcpy(layout->u.earray.swizzled_dim, layout->dim, (layout->ndims - 1) * sizeof(layout->dim[0]));
@@ -1215,6 +1207,14 @@ H5D__earray_idx_resize(H5O_layout_chunk_t *layout)
         /* Get the swizzled "down" sizes for each dimension */
         if(H5VM_array_down((layout->ndims - 1), swizzled_chunks, layout->u.earray.swizzled_down_chunks) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't compute swizzled 'down' chunk size value")
+
+        /* Get the swizzled max number of chunks in each dimension */
+        HDmemcpy(swizzled_max_chunks, layout->max_chunks, (layout->ndims - 1) * sizeof(swizzled_max_chunks[0]));
+        H5VM_swizzle_coords(hsize_t, swizzled_max_chunks, layout->u.earray.unlim_dim);
+
+        /* Get the swizzled max "down" sizes for each dimension */
+        if(H5VM_array_down((layout->ndims - 1), swizzled_max_chunks, layout->u.earray.swizzled_max_down_chunks) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't compute swizzled 'down' chunk size value")
     } /* end if */
 
 done:
@@ -1350,7 +1350,7 @@ H5D__earray_idx_iterate(const H5D_chk_idx_info_t *idx_info,
 	udata.udata = chunk_udata;
 	
         /* Iterate over the extensible array elements */
-	if((ret_value = H5EA_iterate(ea, idx_info->dxpl_id, H5D__earray_idx_iterate_cb, &udata)) < 0)
+	if((ret_value = H5EA_iterate(ea, H5D__earray_idx_iterate_cb, &udata)) < 0)
 	    HERROR(H5E_DATASET, H5E_BADITER, "unable to iterate over fixed array chunk index");
     } /* end if */
 
@@ -1414,7 +1414,7 @@ H5D__earray_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t
         H5VM_swizzle_coords(hsize_t, swizzled_coords, idx_info->layout->u.earray.unlim_dim);
 
         /* Calculate the index of this chunk */
-        idx = H5VM_chunk_index(ndims, swizzled_coords, idx_info->layout->u.earray.swizzled_dim, idx_info->layout->u.earray.swizzled_down_chunks);
+        idx = H5VM_chunk_index(ndims, swizzled_coords, idx_info->layout->u.earray.swizzled_dim, idx_info->layout->u.earray.swizzled_max_down_chunks);
     } /* end if */
     else {
         /* Calculate the index of this chunk */
@@ -1426,14 +1426,14 @@ H5D__earray_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t
         H5D_earray_filt_elmt_t elmt;            /* Extensible array element */
 
         /* Get the info about the chunk for the index */
-        if(H5EA_get(ea, idx_info->dxpl_id, idx, &elmt) < 0)
+        if(H5EA_get(ea, idx, &elmt) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk info")
 
         /* Remove raw data chunk from file if not doing SWMR writes */
         HDassert(H5F_addr_defined(elmt.addr));
         if(!(H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE)) {
             H5_CHECK_OVERFLOW(elmt.nbytes, /*From: */uint32_t, /*To: */hsize_t);
-            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, elmt.addr, (hsize_t)elmt.nbytes) < 0)
+            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, elmt.addr, (hsize_t)elmt.nbytes) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to free chunk")
         } /* end if */
 
@@ -1441,27 +1441,27 @@ H5D__earray_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t
         elmt.addr = HADDR_UNDEF;
         elmt.nbytes = 0;
         elmt.filter_mask = 0;
-        if(H5EA_set(ea, idx_info->dxpl_id, idx, &elmt) < 0)
+        if(H5EA_set(ea, idx, &elmt) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to reset chunk info")
     } /* end if */
     else {
         haddr_t     addr = HADDR_UNDEF;     /* Chunk address */
 
         /* Get the address of the chunk for the index */
-        if(H5EA_get(ea, idx_info->dxpl_id, idx, &addr) < 0)
+        if(H5EA_get(ea, idx, &addr) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk address")
 
         /* Remove raw data chunk from file if not doing SWMR writes */
         HDassert(H5F_addr_defined(addr));
         if(!(H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE)) {
             H5_CHECK_OVERFLOW(idx_info->layout->size, /*From: */uint32_t, /*To: */hsize_t);
-            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, addr, (hsize_t)idx_info->layout->size) < 0)
+            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, addr, (hsize_t)idx_info->layout->size) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to free chunk")
         } /* end if */
 
         /* Reset the address of the chunk for the index */
         addr = HADDR_UNDEF;
-        if(H5EA_set(ea, idx_info->dxpl_id, idx, &addr) < 0)
+        if(H5EA_set(ea, idx, &addr) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to reset chunk address")
     } /* end else */
 
@@ -1486,7 +1486,7 @@ done:
 static int
 H5D__earray_idx_delete_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
 {
-    H5D_earray_ud_t *udata = (H5D_earray_ud_t *)_udata;         /* User data for callback */
+    H5F_t *f = (H5F_t *)_udata;         /* User data for callback */
     int ret_value = H5_ITER_CONT;       /* Return value */
 
     FUNC_ENTER_STATIC
@@ -1495,12 +1495,11 @@ H5D__earray_idx_delete_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     HDassert(chunk_rec);
     HDassert(H5F_addr_defined(chunk_rec->chunk_addr));
     HDassert(chunk_rec->nbytes > 0);
-    HDassert(udata);
-    HDassert(udata->f);
+    HDassert(f);
 
     /* Remove raw data chunk from file */
     H5_CHECK_OVERFLOW(chunk_rec->nbytes, /*From: */uint32_t, /*To: */hsize_t);
-    if(H5MF_xfree(udata->f, H5FD_MEM_DRAW, udata->dxpl_id, chunk_rec->chunk_addr, (hsize_t)chunk_rec->nbytes) < 0)
+    if(H5MF_xfree(f, H5FD_MEM_DRAW, chunk_rec->chunk_addr, (hsize_t)chunk_rec->nbytes) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, H5_ITER_ERROR, "unable to free chunk")
 
 done:
@@ -1542,19 +1541,14 @@ H5D__earray_idx_delete(const H5D_chk_idx_info_t *idx_info)
 
     /* Check if the index data structure has been allocated */
     if(H5F_addr_defined(idx_info->storage->idx_addr)) {
-        H5D_earray_ud_t udata;         /* User data for callback */
         H5D_earray_ctx_ud_t ctx_udata; /* User data for extensible array open call */
 
-        /* Initialize user data for callback */
-        udata.f = idx_info->f;
-        udata.dxpl_id = idx_info->dxpl_id;
-
         /* Iterate over the chunk addresses in the extensible array, deleting each chunk */
-        if(H5D__earray_idx_iterate(idx_info, H5D__earray_idx_delete_cb, &udata) < 0)
+        if(H5D__earray_idx_iterate(idx_info, H5D__earray_idx_delete_cb, idx_info->f) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to iterate over chunk addresses")
 
         /* Close extensible array */
-        if(H5EA_close(idx_info->storage->u.earray.ea, idx_info->dxpl_id) < 0)
+        if(H5EA_close(idx_info->storage->u.earray.ea) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close extensible array")
         idx_info->storage->u.earray.ea = NULL;
 
@@ -1563,7 +1557,7 @@ H5D__earray_idx_delete(const H5D_chk_idx_info_t *idx_info)
         ctx_udata.chunk_size = idx_info->layout->size;
 
         /* Delete extensible array */
-        if(H5EA_delete(idx_info->f, idx_info->dxpl_id, idx_info->storage->idx_addr, &ctx_udata) < 0)
+        if(H5EA_delete(idx_info->f, idx_info->storage->idx_addr, &ctx_udata) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, FAIL, "unable to delete chunk extensible array")
         idx_info->storage->idx_addr = HADDR_UNDEF;
     } /* end if */
@@ -1615,7 +1609,7 @@ H5D__earray_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "can't open extensible array")
 
     /* Set copied metadata tag */
-    H5_BEGIN_TAG(idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL);
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Create the extensible array that describes chunked storage in the dest. file */
     if(H5D__earray_idx_create(idx_info_dst) < 0)
@@ -1623,7 +1617,7 @@ H5D__earray_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     HDassert(H5F_addr_defined(idx_info_dst->storage->idx_addr));
 
     /* Reset metadata tag */
-    H5_END_TAG(FAIL);
+    H5_END_TAG
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1644,7 +1638,7 @@ done:
  */
 static herr_t
 H5D__earray_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id)
+    H5O_storage_chunk_t *storage_dst)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -1657,10 +1651,10 @@ H5D__earray_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
     HDassert(storage_dst->u.earray.ea);
 
     /* Close extensible arrays */
-    if(H5EA_close(storage_src->u.earray.ea, dxpl_id) < 0)
+    if(H5EA_close(storage_src->u.earray.ea) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close extensible array")
     storage_src->u.earray.ea = NULL;
-    if(H5EA_close(storage_dst->u.earray.ea, dxpl_id) < 0)
+    if(H5EA_close(storage_dst->u.earray.ea) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close extensible array")
     storage_dst->u.earray.ea = NULL;
 
@@ -1717,7 +1711,7 @@ H5D__earray_idx_size(const H5D_chk_idx_info_t *idx_info, hsize_t *index_size)
 
 done:
     if(idx_info->storage->u.earray.ea) {
-        if(H5EA_close(idx_info->storage->u.earray.ea, idx_info->dxpl_id) < 0)
+        if(H5EA_close(idx_info->storage->u.earray.ea) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close extensible array")
         idx_info->storage->u.earray.ea = NULL;
     } /* end if */
@@ -1816,7 +1810,7 @@ H5D__earray_idx_dest(const H5D_chk_idx_info_t *idx_info)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "can't patch earray file pointer")
 
         /* Close extensible array */
-        if(H5EA_close(idx_info->storage->u.earray.ea, idx_info->dxpl_id) < 0)
+        if(H5EA_close(idx_info->storage->u.earray.ea) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close extensible array")
         idx_info->storage->u.earray.ea = NULL;
     } /* end if */
diff --git a/src/H5Defl.c b/src/H5Defl.c
index b9a626f..b2f9b29 100644
--- a/src/H5Defl.c
+++ b/src/H5Defl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -290,7 +288,7 @@ H5D__efl_read(const H5O_efl_t *efl, const H5D_t *dset, haddr_t addr, size_t size
             HGOTO_ERROR(H5E_EFL, H5E_OVERFLOW, FAIL, "external file address overflowed")
         if(H5_combine_path(dset->shared->extfile_prefix, efl->slot[u].name, &full_name) < 0)
             HGOTO_ERROR(H5E_EFL, H5E_NOSPACE, FAIL, "can't build external file name")
-        if((fd = HDopen(full_name, O_RDONLY, 0)) < 0)
+        if((fd = HDopen(full_name, O_RDONLY)) < 0)
             HGOTO_ERROR(H5E_EFL, H5E_CANTOPENFILE, FAIL, "unable to open external raw data file")
         if(HDlseek(fd, (HDoff_t)(efl->slot[u].offset + (HDoff_t)skip), SEEK_SET) < 0)
             HGOTO_ERROR(H5E_EFL, H5E_SEEKERROR, FAIL, "unable to seek in external raw data file")
@@ -382,7 +380,7 @@ H5D__efl_write(const H5O_efl_t *efl, const H5D_t *dset, haddr_t addr, size_t siz
             HGOTO_ERROR(H5E_EFL, H5E_OVERFLOW, FAIL, "external file address overflowed")
         if(H5_combine_path(dset->shared->extfile_prefix, efl->slot[u].name, &full_name) < 0)
             HGOTO_ERROR(H5E_EFL, H5E_NOSPACE, FAIL, "can't build external file name")
-        if((fd = HDopen(full_name, O_CREAT | O_RDWR, 0666)) < 0) {
+        if((fd = HDopen(full_name, O_CREAT | O_RDWR, H5_POSIX_CREATE_MODE_RW)) < 0) {
             if(HDaccess(full_name, F_OK) < 0)
                 HGOTO_ERROR(H5E_EFL, H5E_CANTOPENFILE, FAIL, "external raw data file does not exist")
             else
@@ -599,7 +597,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__efl_bh_info(H5F_t *f, hid_t dxpl_id, H5O_efl_t *efl, hsize_t *heap_size)
+H5D__efl_bh_info(H5F_t *f, H5O_efl_t *efl, hsize_t *heap_size)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -612,7 +610,7 @@ H5D__efl_bh_info(H5F_t *f, hid_t dxpl_id, H5O_efl_t *efl, hsize_t *heap_size)
     HDassert(heap_size);
 
     /* Get the size of the local heap for EFL's file list */
-    if(H5HL_heapsize(f, dxpl_id, efl->heap_addr, heap_size) < 0)
+    if(H5HL_heapsize(f, efl->heap_addr, heap_size) < 0)
         HGOTO_ERROR(H5E_EFL, H5E_CANTINIT, FAIL, "unable to retrieve local heap info")
 
 done:
diff --git a/src/H5Dfarray.c b/src/H5Dfarray.c
index 6b95e12..372ae26 100644
--- a/src/H5Dfarray.c
+++ b/src/H5Dfarray.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer: 	Vailin Choi <vchoi@hdfgroup.org>
@@ -66,12 +64,6 @@ typedef struct H5D_farray_ctx_t {
     size_t chunk_size_len;      /* Size of chunk sizes in the file (bytes) */
 } H5D_farray_ctx_t;
 
-/* User data for chunk callbacks */
-typedef struct H5D_farray_ud_t {
-    H5F_t *f;                   /* File pointer for operation */
-    hid_t dxpl_id;              /* DXPL ID for operation */
-} H5D_farray_ud_t;
-
 /* Fixed Array callback info for iteration over chunks */
 typedef struct H5D_farray_it_ud_t {
     H5D_chunk_common_ud_t common;       /* Common info for Fixed Array user data (must be first) */
@@ -107,8 +99,7 @@ static herr_t H5D__farray_decode(const void *raw, void *elmt, size_t nelmts,
     void *ctx);
 static herr_t H5D__farray_debug(FILE *stream, int indent, int fwidth,
     hsize_t idx, const void *elmt);
-static void *H5D__farray_crt_dbg_context(H5F_t *f, hid_t dxpl_id,
-    haddr_t obj_addr);
+static void *H5D__farray_crt_dbg_context(H5F_t *f, haddr_t obj_addr);
 static herr_t H5D__farray_dst_dbg_context(void *dbg_ctx);
 
 /* Fixed array class callbacks for chunks w/filters */
@@ -138,7 +129,7 @@ static herr_t H5D__farray_idx_delete(const H5D_chk_idx_info_t *idx_info);
 static herr_t H5D__farray_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     const H5D_chk_idx_info_t *idx_info_dst);
 static herr_t H5D__farray_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id);
+    H5O_storage_chunk_t *storage_dst);
 static herr_t H5D__farray_idx_size(const H5D_chk_idx_info_t *idx_info,
     hsize_t *size);
 static herr_t H5D__farray_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr);
@@ -466,7 +457,7 @@ H5D__farray_debug(FILE *stream, int indent, int fwidth, hsize_t idx,
  *-------------------------------------------------------------------------
  */
 static void *
-H5D__farray_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr)
+H5D__farray_crt_dbg_context(H5F_t *f, haddr_t obj_addr)
 {
     H5D_farray_ctx_ud_t	*dbg_ctx = NULL;   /* Context for fixed array callback */
     H5O_loc_t obj_loc;          /* Pointer to an object's location */
@@ -495,7 +486,7 @@ H5D__farray_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr)
     obj_opened = TRUE;
 
     /* Read the layout message */
-    if(NULL == H5O_msg_read(&obj_loc, H5O_LAYOUT_ID, &layout, dxpl_id))
+    if(NULL == H5O_msg_read(&obj_loc, H5O_LAYOUT_ID, &layout))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, NULL, "can't get layout info")
 
     /* close the object header */
@@ -517,10 +508,9 @@ done:
             dbg_ctx = H5FL_FREE(H5D_farray_ctx_ud_t, dbg_ctx);
 
         /* Close object header */
-        if(obj_opened) {
+        if(obj_opened)
             if(H5O_close(&obj_loc, NULL) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, NULL, "can't close object header")
-        } /* end if */
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -759,7 +749,7 @@ H5D__farray_idx_depend(const H5D_chk_idx_info_t *idx_info)
     oloc.addr = idx_info->storage->u.farray.dset_ohdr_addr;
 
     /* Get header */
-    if(NULL == (oh = H5O_protect(&oloc, idx_info->dxpl_id, H5AC__READ_ONLY_FLAG, TRUE)))
+    if(NULL == (oh = H5O_protect(&oloc, H5AC__READ_ONLY_FLAG, TRUE)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Retrieve the dataset's object header proxy */
@@ -767,12 +757,12 @@ H5D__farray_idx_depend(const H5D_chk_idx_info_t *idx_info)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get dataset object header proxy")
 
     /* Make the fixed array a child flush dependency of the dataset's object header proxy */
-    if(H5FA_depend(idx_info->storage->u.farray.fa, idx_info->dxpl_id, oh_proxy) < 0)
+    if(H5FA_depend(idx_info->storage->u.farray.fa, oh_proxy) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTDEPEND, FAIL, "unable to create flush dependency on object header proxy")
 
 done:
     /* Release the object header from the cache */
-    if(oh && H5O_unprotect(&oloc, idx_info->dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(&oloc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_DATASET, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -845,7 +835,7 @@ H5D__farray_idx_open(const H5D_chk_idx_info_t *idx_info)
     udata.chunk_size = idx_info->layout->size;
 
     /* Open the fixed array for the chunk index */
-    if(NULL == (idx_info->storage->u.farray.fa = H5FA_open(idx_info->f, idx_info->dxpl_id, idx_info->storage->idx_addr, &udata)))
+    if(NULL == (idx_info->storage->u.farray.fa = H5FA_open(idx_info->f, idx_info->storage->idx_addr, &udata)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't open fixed array")
 
      /* Check for SWMR writes to the file */
@@ -922,7 +912,7 @@ H5D__farray_idx_create(const H5D_chk_idx_info_t *idx_info)
     udata.chunk_size = idx_info->layout->size;
     
     /* Create the fixed array for the chunk index */
-    if(NULL == (idx_info->storage->u.farray.fa = H5FA_create(idx_info->f, idx_info->dxpl_id, &cparam, &udata)))
+    if(NULL == (idx_info->storage->u.farray.fa = H5FA_create(idx_info->f, &cparam, &udata)))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't create fixed array")
 
     /* Get the address of the fixed array in file */
@@ -1017,12 +1007,12 @@ H5D__farray_idx_insert(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata
         elmt.filter_mask = udata->filter_mask;
 
         /* Set the info for the chunk */
-        if(H5FA_set(fa, idx_info->dxpl_id, udata->chunk_idx, &elmt) < 0)
+        if(H5FA_set(fa, udata->chunk_idx, &elmt) < 0)
 	    HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set chunk info")
     } /* end if */
     else {
         /* Set the address for the chunk */
-        if(H5FA_set(fa, idx_info->dxpl_id, udata->chunk_idx, &udata->chunk_block.offset) < 0)
+        if(H5FA_set(fa, udata->chunk_idx, &udata->chunk_block.offset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set chunk address")
     } /* end else */
 
@@ -1084,7 +1074,7 @@ H5D__farray_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *uda
         H5D_farray_filt_elmt_t elmt;            /* Fixed array element */
 
         /* Get the information for the chunk */
-        if(H5FA_get(fa, idx_info->dxpl_id, idx, &elmt) < 0)
+        if(H5FA_get(fa, idx, &elmt) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk info")
 
         /* Set the info for the chunk */
@@ -1094,7 +1084,7 @@ H5D__farray_idx_get_addr(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *uda
     } /* end if */
     else {
         /* Get the address for the chunk */
-        if(H5FA_get(fa, idx_info->dxpl_id, idx, &udata->chunk_block.offset) < 0)
+        if(H5FA_get(fa, idx, &udata->chunk_block.offset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk address")
 
         /* Update the other (constant) information for the chunk */
@@ -1236,7 +1226,7 @@ H5D__farray_idx_iterate(const H5D_chk_idx_info_t *idx_info,
 	udata.udata = chunk_udata;
 	
         /* Iterate over the fixed array elements */
-	if((ret_value = H5FA_iterate(fa, idx_info->dxpl_id, H5D__farray_idx_iterate_cb, &udata)) < 0)
+	if((ret_value = H5FA_iterate(fa, H5D__farray_idx_iterate_cb, &udata)) < 0)
 	    HERROR(H5E_DATASET, H5E_BADITER, "unable to iterate over fixed array chunk index");
     } /* end if */
 
@@ -1295,14 +1285,14 @@ H5D__farray_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t
         H5D_farray_filt_elmt_t elmt;            /* Fixed array element */
 
         /* Get the info about the chunk for the index */
-        if(H5FA_get(fa, idx_info->dxpl_id, idx, &elmt) < 0)
+        if(H5FA_get(fa, idx, &elmt) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk info")
 
         /* Remove raw data chunk from file if not doing SWMR writes */
         HDassert(H5F_addr_defined(elmt.addr));
         if(!(H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE)) {
             H5_CHECK_OVERFLOW(elmt.nbytes, /*From: */uint32_t, /*To: */hsize_t);
-            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, elmt.addr, (hsize_t)elmt.nbytes) < 0)
+            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, elmt.addr, (hsize_t)elmt.nbytes) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to free chunk")
         } /* end if */
 
@@ -1310,27 +1300,27 @@ H5D__farray_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t
         elmt.addr = HADDR_UNDEF;
         elmt.nbytes = 0;
         elmt.filter_mask = 0;
-        if(H5FA_set(fa, idx_info->dxpl_id, idx, &elmt) < 0)
+        if(H5FA_set(fa, idx, &elmt) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to reset chunk info")
     } /* end if */
     else {
         haddr_t     addr = HADDR_UNDEF;     /* Chunk address */
 
         /* Get the address of the chunk for the index */
-        if(H5FA_get(fa, idx_info->dxpl_id, idx, &addr) < 0)
+        if(H5FA_get(fa, idx, &addr) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get chunk address")
 
         /* Remove raw data chunk from file if not doing SWMR writes */
         HDassert(H5F_addr_defined(addr));
         if(!(H5F_INTENT(idx_info->f) & H5F_ACC_SWMR_WRITE)) {
             H5_CHECK_OVERFLOW(idx_info->layout->size, /*From: */uint32_t, /*To: */hsize_t);
-            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, addr, (hsize_t)idx_info->layout->size) < 0)
+            if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, addr, (hsize_t)idx_info->layout->size) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to free chunk")
         } /* end if */
 
         /* Reset the address of the chunk for the index */
         addr = HADDR_UNDEF;
-        if(H5FA_set(fa, idx_info->dxpl_id, idx, &addr) < 0)
+        if(H5FA_set(fa, idx, &addr) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to reset chunk address")
     } /* end else */
 
@@ -1355,7 +1345,7 @@ done:
 static int
 H5D__farray_idx_delete_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
 {
-    H5D_farray_ud_t *udata = (H5D_farray_ud_t *)_udata;         /* User data for callback */
+    H5F_t *f = (H5F_t *)_udata;         /* User data for callback */
     int ret_value = H5_ITER_CONT;       /* Return value */
 
     FUNC_ENTER_STATIC
@@ -1364,12 +1354,11 @@ H5D__farray_idx_delete_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
     HDassert(chunk_rec);
     HDassert(H5F_addr_defined(chunk_rec->chunk_addr));
     HDassert(chunk_rec->nbytes > 0);
-    HDassert(udata);
-    HDassert(udata->f);
+    HDassert(f);
 
     /* Remove raw data chunk from file */
     H5_CHECK_OVERFLOW(chunk_rec->nbytes, /*From: */uint32_t, /*To: */hsize_t);
-    if(H5MF_xfree(udata->f, H5FD_MEM_DRAW, udata->dxpl_id, chunk_rec->chunk_addr, (hsize_t)chunk_rec->nbytes) < 0)
+    if(H5MF_xfree(f, H5FD_MEM_DRAW, chunk_rec->chunk_addr, (hsize_t)chunk_rec->nbytes) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, H5_ITER_ERROR, "unable to free chunk")
 
 done:
@@ -1407,19 +1396,14 @@ H5D__farray_idx_delete(const H5D_chk_idx_info_t *idx_info)
 
     /* Check if the index data structure has been allocated */
     if(H5F_addr_defined(idx_info->storage->idx_addr)) {
-        H5D_farray_ud_t udata;      /* User data for callback */
         H5D_farray_ctx_ud_t ctx_udata;  /* User data for fixed array open call */
 
-	/* Initialize user data for callback */
-	udata.f = idx_info->f;
-	udata.dxpl_id = idx_info->dxpl_id;
-
 	/* Iterate over the chunk addresses in the fixed array, deleting each chunk */
-        if(H5D__farray_idx_iterate(idx_info, H5D__farray_idx_delete_cb, &udata) < 0)
+        if(H5D__farray_idx_iterate(idx_info, H5D__farray_idx_delete_cb, idx_info->f) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to iterate over chunk addresses")
 
         /* Close fixed array */
-        if(H5FA_close(idx_info->storage->u.farray.fa, idx_info->dxpl_id) < 0)
+        if(H5FA_close(idx_info->storage->u.farray.fa) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close fixed array")
         idx_info->storage->u.farray.fa = NULL;
 
@@ -1428,7 +1412,7 @@ H5D__farray_idx_delete(const H5D_chk_idx_info_t *idx_info)
         ctx_udata.chunk_size = idx_info->layout->size;
 
         /* Delete fixed array */
-        if(H5FA_delete(idx_info->f, idx_info->dxpl_id, idx_info->storage->idx_addr, &ctx_udata) < 0)
+        if(H5FA_delete(idx_info->f, idx_info->storage->idx_addr, &ctx_udata) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTDELETE, FAIL, "unable to delete chunk fixed array")
         idx_info->storage->idx_addr = HADDR_UNDEF;
     } /* end if */
@@ -1480,7 +1464,7 @@ H5D__farray_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "can't open fixed array")
 
     /* Set copied metadata tag */
-    H5_BEGIN_TAG(idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL);
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Create the fixed array that describes chunked storage in the dest. file */
     if(H5D__farray_idx_create(idx_info_dst) < 0)
@@ -1488,7 +1472,7 @@ H5D__farray_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     HDassert(H5F_addr_defined(idx_info_dst->storage->idx_addr));
 
     /* Reset metadata tag */
-    H5_END_TAG(FAIL);
+    H5_END_TAG
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1509,7 +1493,7 @@ done:
  */
 static herr_t
 H5D__farray_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id)
+    H5O_storage_chunk_t *storage_dst)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -1522,10 +1506,10 @@ H5D__farray_idx_copy_shutdown(H5O_storage_chunk_t *storage_src,
     HDassert(storage_dst->u.farray.fa);
 
     /* Close fixed arrays */
-    if(H5FA_close(storage_src->u.farray.fa, dxpl_id) < 0)
+    if(H5FA_close(storage_src->u.farray.fa) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close fixed array")
     storage_src->u.farray.fa = NULL;
-    if(H5FA_close(storage_dst->u.farray.fa, dxpl_id) < 0)
+    if(H5FA_close(storage_dst->u.farray.fa) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close fixed array")
     storage_dst->u.farray.fa = NULL;
 
@@ -1581,7 +1565,7 @@ H5D__farray_idx_size(const H5D_chk_idx_info_t *idx_info, hsize_t *index_size)
 
 done:
     if(idx_info->storage->u.farray.fa) {
-        if(H5FA_close(idx_info->storage->u.farray.fa, idx_info->dxpl_id) < 0)
+        if(H5FA_close(idx_info->storage->u.farray.fa) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close fixed array")
         idx_info->storage->u.farray.fa = NULL;
     } /* end if */
@@ -1678,7 +1662,7 @@ H5D__farray_idx_dest(const H5D_chk_idx_info_t *idx_info)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "can't patch fixed array file pointer")
 
         /* Close fixed array */
-        if(H5FA_close(idx_info->storage->u.farray.fa, idx_info->dxpl_id) < 0)
+        if(H5FA_close(idx_info->storage->u.farray.fa) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to close fixed array")
         idx_info->storage->u.farray.fa = NULL;
     } /* end if */
diff --git a/src/H5Dfill.c b/src/H5Dfill.c
index 50c964b..e42e551 100644
--- a/src/H5Dfill.c
+++ b/src/H5Dfill.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -35,11 +33,12 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Dataset functions			*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free Lists                           */
 #include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5VMprivate.h"		/* Vector and array functions		*/
+#include "H5VMprivate.h"	/* Vector and array functions		*/
 #include "H5WBprivate.h"        /* Wrapped Buffers                      */
 
 
@@ -137,7 +136,7 @@ H5Dfill(const void *fill, hid_t fill_type_id, void *buf, hid_t buf_type_id, hid_
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not a datatype")
 
     /* Fill the selection in the memory buffer */
-    if(H5D__fill(fill, fill_type, buf, buf_type, space, H5AC_noio_dxpl_id) < 0)
+    if(H5D__fill(fill, fill_type, buf, buf_type, space) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTENCODE, FAIL, "filling selection failed")
 
 done:
@@ -175,7 +174,7 @@ done:
 --------------------------------------------------------------------------*/
 herr_t
 H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
-          const H5T_t *buf_type, const H5S_t *space, hid_t dxpl_id)
+    const H5T_t *buf_type, const H5S_t *space)
 {
     H5S_sel_iter_t *mem_iter = NULL; /* Memory selection iteration info */
     hbool_t mem_iter_init = FALSE; /* Whether the memory selection iterator has been initialized */
@@ -232,7 +231,7 @@ H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
         buf_size = MAX(src_type_size, dst_type_size);
 
         /* Set up type conversion function */
-        if(NULL == (tpath = H5T_path_find(fill_type, buf_type, NULL, NULL, dxpl_id, FALSE)))
+        if(NULL == (tpath = H5T_path_find(fill_type, buf_type)))
             HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest datatype")
 
         /* Construct source & destination datatype IDs, if we will need them */
@@ -249,8 +248,6 @@ H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
          * of the VL data.
          */
         if(TRUE == H5T_detect_class(fill_type, H5T_VLEN, FALSE)) {
-            H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-            H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
             hssize_t nelmts;                    /* Number of data elements */
 
             /* Get the number of elements in the selection */
@@ -270,13 +267,9 @@ H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
             H5VM_array_fill(tmp_buf, fill, src_type_size, (size_t)nelmts);
 
             /* Convert from file's fill value into memory form */
-            if(H5T_convert(tpath, src_id, dst_id, (size_t)nelmts, (size_t)0, (size_t)0, tmp_buf, bkg_buf, dxpl_id) < 0)
+            if(H5T_convert(tpath, src_id, dst_id, (size_t)nelmts, (size_t)0, (size_t)0, tmp_buf, bkg_buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "data type conversion failed")
 
-            /* Fill the DXPL cache values for later use */
-            if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-                HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
             /* Allocate the chunk selection iterator */
             if(NULL == (mem_iter = H5FL_MALLOC(H5S_sel_iter_t)))
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "can't allocate memory selection iterator")
@@ -287,7 +280,7 @@ H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
             mem_iter_init = TRUE;
 
             /* Scatter the data into memory */
-            if(H5D__scatter_mem(tmp_buf, space, mem_iter, (size_t)nelmts, dxpl_cache, buf/*out*/) < 0)
+            if(H5D__scatter_mem(tmp_buf, space, mem_iter, (size_t)nelmts, buf/*out*/) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "scatter failed")
         } /* end if */
         else {
@@ -322,7 +315,7 @@ H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
                 } /* end if */
 
                 /* Perform datatype conversion */
-                if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, elem_ptr, bkg_ptr, dxpl_id) < 0)
+                if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, elem_ptr, bkg_ptr) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "data type conversion failed")
 
                 /* Point at element buffer */
@@ -376,7 +369,7 @@ H5D__fill_init(H5D_fill_buf_info_t *fb_info, void *caller_fill_buf,
     H5MM_allocate_t alloc_func, void *alloc_info,
     H5MM_free_t free_func, void *free_info,
     const H5O_fill_t *fill, const H5T_t *dset_type, hid_t dset_type_id,
-    size_t total_nelmts, size_t max_buf_size, hid_t dxpl_id)
+    size_t total_nelmts, size_t max_buf_size)
 {
     herr_t	ret_value = SUCCEED;	/* Return value */
 
@@ -412,7 +405,7 @@ H5D__fill_init(H5D_fill_buf_info_t *fb_info, void *caller_fill_buf,
         /* If necessary, convert fill value datatypes (which copies VL components, etc.) */
         if(fb_info->has_vlen_fill_type) {
             /* Create temporary datatype for conversion operation */
-            if(NULL == (fb_info->mem_type = H5T_copy(dset_type, H5T_COPY_REOPEN)))
+            if(NULL == (fb_info->mem_type = H5T_copy(dset_type, H5T_COPY_TRANSIENT)))
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "unable to copy file datatype")
             if((fb_info->mem_tid = H5I_register(H5I_DATATYPE, fb_info->mem_type, FALSE)) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register memory datatype")
@@ -451,11 +444,11 @@ H5D__fill_init(H5D_fill_buf_info_t *fb_info, void *caller_fill_buf,
             } /* end else */
 
             /* Get the datatype conversion path for this operation */
-            if(NULL == (fb_info->fill_to_mem_tpath = H5T_path_find(dset_type, fb_info->mem_type, NULL, NULL, dxpl_id, FALSE)))
+            if(NULL == (fb_info->fill_to_mem_tpath = H5T_path_find(dset_type, fb_info->mem_type)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert between src and dst datatypes")
 
             /* Get the inverse datatype conversion path for this operation */
-            if(NULL == (fb_info->mem_to_dset_tpath = H5T_path_find(fb_info->mem_type, dset_type, NULL, NULL, dxpl_id, FALSE)))
+            if(NULL == (fb_info->mem_to_dset_tpath = H5T_path_find(fb_info->mem_type, dset_type)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert between src and dst datatypes")
 
             /* Check if we need to allocate a background buffer */
@@ -571,7 +564,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts, hid_t dxpl_id)
+H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts)
 {    
     herr_t	ret_value = SUCCEED;	/* Return value */
     void * buf = NULL;              /* Temporary fill buffer */
@@ -591,7 +584,7 @@ H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts, hid_t dxpl_id)
         HDmemset(fb_info->bkg_buf, 0, fb_info->max_elmt_size);
 
     /* Type convert the dataset buffer, to copy any VL components */
-    if(H5T_convert(fb_info->fill_to_mem_tpath, fb_info->file_tid, fb_info->mem_tid, (size_t)1, (size_t)0, (size_t)0, fb_info->fill_buf, fb_info->bkg_buf, dxpl_id) < 0)
+    if(H5T_convert(fb_info->fill_to_mem_tpath, fb_info->file_tid, fb_info->mem_tid, (size_t)1, (size_t)0, (size_t)0, fb_info->fill_buf, fb_info->bkg_buf) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "data type conversion failed")
 
     /* Replicate the fill value into the cached buffer */
@@ -613,18 +606,18 @@ H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts, hid_t dxpl_id)
     HDmemcpy(buf, fb_info->fill_buf, fb_info->fill_buf_size);
 
     /* Type convert the dataset buffer, to copy any VL components */
-    if(H5T_convert(fb_info->mem_to_dset_tpath, fb_info->mem_tid, fb_info->file_tid, nelmts, (size_t)0, (size_t)0, fb_info->fill_buf, fb_info->bkg_buf, dxpl_id) < 0)
+    if(H5T_convert(fb_info->mem_to_dset_tpath, fb_info->mem_tid, fb_info->file_tid, nelmts, (size_t)0, (size_t)0, fb_info->fill_buf, fb_info->bkg_buf) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "data type conversion failed")
 
 done:
     if(buf) {
         /* Free dynamically allocated VL elements in fill buffer */
         if(fb_info->fill->type) {
-            if(H5T_vlen_reclaim_elmt(buf, fb_info->fill->type, dxpl_id) < 0)
+            if(H5T_vlen_reclaim_elmt(buf, fb_info->fill->type) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "can't reclaim vlen element")
         } /* end if */
         else {
-            if(H5T_vlen_reclaim_elmt(buf, fb_info->mem_type, dxpl_id) < 0)
+            if(H5T_vlen_reclaim_elmt(buf, fb_info->mem_type) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "can't reclaim vlen element")
         } /* end else */
 
@@ -705,7 +698,7 @@ H5D__fill_term(H5D_fill_buf_info_t *fb_info)
         if(fb_info->mem_tid > 0)
             H5I_dec_ref(fb_info->mem_tid);
         else if(fb_info->mem_type)
-            H5T_close(fb_info->mem_type);
+            (void)H5T_close_real(fb_info->mem_type);
         if(fb_info->bkg_buf)
             fb_info->bkg_buf = H5FL_BLK_FREE(type_conv, fb_info->bkg_buf);
     } /* end if */
diff --git a/src/H5Dint.c b/src/H5Dint.c
index febf76a..b9d9cce 100644
--- a/src/H5Dint.c
+++ b/src/H5Dint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -23,14 +21,15 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Dpkg.h"		/* Datasets 				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5FLprivate.h"	/* Free Lists                           */
-#include "H5FOprivate.h"        /* File objects                         */
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5Lprivate.h"		/* Links		  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
+#include "H5private.h"        /* Generic Functions */
+#include "H5Dpkg.h"           /* Datasets */
+#include "H5CXprivate.h"      /* API Contexts */
+#include "H5Eprivate.h"       /* Error handling */
+#include "H5FLprivate.h"      /* Free Lists */
+#include "H5FOprivate.h"      /* File objects */
+#include "H5Iprivate.h"       /* IDs */
+#include "H5Lprivate.h"       /* Links */
+#include "H5MMprivate.h"      /* Memory management */
 
 
 /****************/
@@ -42,41 +41,31 @@
 /* Local Typedefs */
 /******************/
 
-/* Struct for holding callback info during H5D_flush operation */
-typedef struct {
-    const H5F_t *f;             /* Pointer to file being flushed */
-    hid_t dxpl_id;              /* DXPL for I/O operations */
-} H5D_flush_ud_t;
-
 
 /********************/
 /* Local Prototypes */
 /********************/
 
 /* General stuff */
-static herr_t H5D__get_dxpl_cache_real(hid_t dxpl_id, H5D_dxpl_cache_t *cache);
-static H5D_shared_t *H5D__new(hid_t dcpl_id, hbool_t creating,
-    hbool_t vl_type);
+static H5D_shared_t *H5D__new(hid_t dcpl_id, hbool_t creating, hbool_t vl_type);
 static herr_t H5D__init_type(H5F_t *file, const H5D_t *dset, hid_t type_id,
     const H5T_t *type);
 static herr_t H5D__cache_dataspace_info(const H5D_t *dset);
 static herr_t H5D__init_space(H5F_t *file, const H5D_t *dset, const H5S_t *space);
-static herr_t H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset,
-    hid_t dapl_id);
-static herr_t H5D_build_extfile_prefix(const H5D_t *dset, hid_t dapl_id,
-    char **extfile_prefix);
-static herr_t H5D__open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id);
+static herr_t H5D__update_oh_info(H5F_t *file, H5D_t *dset, hid_t dapl_id);
+static herr_t H5D__build_file_prefix(const H5D_t *dset, hid_t dapl_id,
+    const char *prefix_type, char **file_prefix);
+static herr_t H5D__open_oid(H5D_t *dataset, hid_t dapl_id);
 static herr_t H5D__init_storage(const H5D_io_info_t *io_info, hbool_t full_overwrite,
-    hsize_t old_dim[]);
+        hsize_t old_dim[]);
+static herr_t H5D__get_storage_size_real(const H5D_t *dset, hsize_t *storage_size);
 static herr_t H5D__append_flush_setup(H5D_t *dset, hid_t dapl_id);
+static herr_t H5D__close_cb(H5D_t *dataset);
 
 /*********************/
 /* Package Variables */
 /*********************/
 
-/* Define a "default" dataset transfer property list cache structure to use for default DXPLs */
-H5D_dxpl_cache_t H5D_def_dxpl_cache;
-
 /* Declare a free list to manage blocks of VL data */
 H5FL_BLK_DEFINE(vlen_vl_buf);
 
@@ -111,10 +100,10 @@ static H5D_shared_t H5D_def_dset;
 
 /* Dataset ID class */
 static const H5I_class_t H5I_DATASET_CLS[1] = {{
-    H5I_DATASET,		/* ID class value */
-    0,				/* Class flags */
-    0,				/* # of reserved IDs for class */
-    (H5I_free_t)H5D_close       /* Callback routine for closing objects of this class */
+    H5I_DATASET,                /* ID class value */
+    0,                          /* Class flags */
+    0,                          /* # of reserved IDs for class */
+    (H5I_free_t)H5D__close_cb   /* Callback routine for closing objects of this class */
 }};
 
 /* Flag indicating "top" of interface has been initialized */
@@ -123,17 +112,13 @@ static hbool_t H5D_top_package_initialize_s = FALSE;
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_init
- *
- * Purpose:	Initialize the interface from some other layer.
+ * Function: H5D_init
  *
- * Return:	Success:	non-negative
+ * Purpose:  Initialize the interface from some other layer.
  *
- *		Failure:	negative
- *
- * Programmer:	Quincey Koziol
- *              Saturday, March 4, 2000
+ * Return:   Success:    non-negative
  *
+ *           Failure:    negative
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -151,7 +136,7 @@ done:
 
 /*--------------------------------------------------------------------------
 NAME
-   H5D__init_package -- Initialize interface-specific information
+    H5D__init_package -- Initialize interface-specific information
 USAGE
     herr_t H5D__init_package()
 
@@ -197,13 +182,6 @@ H5D__init_package(void)
     if(H5P_get(def_dcpl, H5O_CRT_PIPELINE_NAME, &H5D_def_dset.dcpl_cache.pline) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve pipeline filter")
 
-    /* Reset the "default DXPL cache" information */
-    HDmemset(&H5D_def_dxpl_cache, 0, sizeof(H5D_dxpl_cache_t));
-
-    /* Get the default DXPL cache information */
-    if(H5D__get_dxpl_cache_real(H5P_DATASET_XFER_DEFAULT, &H5D_def_dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve default DXPL info")
-
     /* Mark "top" of interface as initialized, too */
     H5D_top_package_initialize_s = TRUE;
 
@@ -213,28 +191,24 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_top_term_package
- *
- * Purpose:	Close the "top" of the interface, releasing IDs, etc.
+ * Function: H5D_top_term_package
  *
- * Return:	Success:	Positive if anything was done that might
- *				affect other interfaces; zero otherwise.
- * 		Failure:	Negative.
- *
- * Programmer:	Quincey Koziol
- *              Sunday, September 13, 2015
+ * Purpose:  Close the "top" of the interface, releasing IDs, etc.
  *
+ * Return:   Success:    Positive if anything was done that might
+ *                affect other interfaces; zero otherwise.
+ *           Failure:    Negative.
  *-------------------------------------------------------------------------
  */
 int
 H5D_top_term_package(void)
 {
-    int	n = 0;
+    int    n = 0;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
     if(H5D_top_package_initialize_s) {
-	if(H5I_nmembers(H5I_DATASET) > 0) {
+        if(H5I_nmembers(H5I_DATASET) > 0) {
             /* The dataset API uses the "force" flag set to true because it
              * is using the "file objects" (H5FO) API functions to track open
              * objects in the file.  Using the H5FO code means that dataset
@@ -257,9 +231,9 @@ H5D_top_term_package(void)
              *
              * QAK - 5/13/03
              */
-	    (void)H5I_clear_type(H5I_DATASET, TRUE, FALSE);
+            (void)H5I_clear_type(H5I_DATASET, TRUE, FALSE);
             n++; /*H5I*/
-	} /* end if */
+        } /* end if */
 
         /* Mark closed */
         if(0 == n)
@@ -271,26 +245,22 @@ H5D_top_term_package(void)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_term_package
- *
- * Purpose:	Terminate this interface.
- *
- * Note:	Finishes shutting down the interface, after
- *		H5D_top_term_package() is called
+ * Function: H5D_term_package
  *
- * Return:	Success:	Positive if anything was done that might
- *				affect other interfaces; zero otherwise.
- * 		Failure:	Negative.
+ * Purpose:  Terminate this interface.
  *
- * Programmer:	Robb Matzke
- *              Friday, November 20, 1998
+ * Note:     Finishes shutting down the interface, after
+ *           H5D_top_term_package() is called
  *
+ * Return:   Success:    Positive if anything was done that might
+ *                affect other interfaces; zero otherwise.
+ *            Failure:    Negative.
  *-------------------------------------------------------------------------
  */
 int
 H5D_term_package(void)
 {
-    int	n = 0;
+    int    n = 0;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -311,160 +281,25 @@ H5D_term_package(void)
 } /* end H5D_term_package() */
 
 
-/*--------------------------------------------------------------------------
- NAME
-    H5D__get_dxpl_cache_real
- PURPOSE
-    Get all the values for the DXPL cache.
- USAGE
-    herr_t H5D__get_dxpl_cache_real(dxpl_id, cache)
-        hid_t dxpl_id;          IN: DXPL to query
-        H5D_dxpl_cache_t *cache;IN/OUT: DXPL cache to fill with values
- RETURNS
-    Non-negative on success/Negative on failure.
- DESCRIPTION
-    Query all the values from a DXPL that are needed by internal routines
-    within the library.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static herr_t
-H5D__get_dxpl_cache_real(hid_t dxpl_id, H5D_dxpl_cache_t *cache)
-{
-    H5P_genplist_t *dx_plist;   /* Data transfer property list */
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Check args */
-    HDassert(cache);
-
-    /* Get the dataset transfer property list */
-    if(NULL == (dx_plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
-    /* Get maximum temporary buffer size */
-    if(H5P_get(dx_plist, H5D_XFER_MAX_TEMP_BUF_NAME, &cache->max_temp_buf) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve maximum temporary buffer size")
-
-    /* Get temporary buffer pointer */
-    if(H5P_get(dx_plist, H5D_XFER_TCONV_BUF_NAME, &cache->tconv_buf) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve temporary buffer pointer")
-
-    /* Get background buffer pointer */
-    if(H5P_get(dx_plist, H5D_XFER_BKGR_BUF_NAME, &cache->bkgr_buf) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve background buffer pointer")
-
-    /* Get background buffer type */
-    if(H5P_get(dx_plist, H5D_XFER_BKGR_BUF_TYPE_NAME, &cache->bkgr_buf_type) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve background buffer type")
-
-    /* Get B-tree split ratios */
-    if(H5P_get(dx_plist, H5D_XFER_BTREE_SPLIT_RATIO_NAME, &cache->btree_split_ratio) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve B-tree split ratios")
-
-    /* Get I/O vector size */
-    if(H5P_get(dx_plist, H5D_XFER_HYPER_VECTOR_SIZE_NAME, &cache->vec_size) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve I/O vector size")
-
-#ifdef H5_HAVE_PARALLEL
-    /* Collect Parallel I/O information for possible later use */
-    if(H5P_get(dx_plist, H5D_XFER_IO_XFER_MODE_NAME, &cache->xfer_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve parallel transfer method")
-    if(H5P_get(dx_plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, &cache->coll_opt_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve collective transfer option")
-#endif /* H5_HAVE_PARALLEL */
-
-    /* Get error detection properties */
-    if(H5P_get(dx_plist, H5D_XFER_EDC_NAME, &cache->err_detect) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve error detection info")
-
-    /* Get filter callback function */
-    if(H5P_get(dx_plist, H5D_XFER_FILTER_CB_NAME, &cache->filter_cb) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve filter callback function")
-
-    /* Look at the data transform property */
-    /* (Note: 'peek', not 'get' - if this turns out to be a problem, we should
-     *          add a H5D__free_dxpl_cache() routine. -QAK)
-     */
-    if(H5P_peek(dx_plist, H5D_XFER_XFORM_NAME, &cache->data_xform_prop) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "Can't retrieve data transform info")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5D__get_dxpl_cache_real() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5D__get_dxpl_cache
- PURPOSE
-    Get all the values for the DXPL cache.
- USAGE
-    herr_t H5D__get_dxpl_cache(dxpl_id, cache)
-        hid_t dxpl_id;          IN: DXPL to query
-        H5D_dxpl_cache_t *cache;IN/OUT: DXPL cache to fill with values
- RETURNS
-    Non-negative on success/Negative on failure.
- DESCRIPTION
-    Query all the values from a DXPL that are needed by internal routines
-    within the library.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-    The CACHE pointer should point at already allocated memory to place
-    non-default property list info.  If a default property list is used, the
-    CACHE pointer will be changed to point at the default information.
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-herr_t
-H5D__get_dxpl_cache(hid_t dxpl_id, H5D_dxpl_cache_t **cache)
-{
-    herr_t ret_value=SUCCEED;   /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* Check args */
-    HDassert(cache);
-
-    /* Check for the default DXPL */
-    if(dxpl_id==H5P_DATASET_XFER_DEFAULT)
-        *cache=&H5D_def_dxpl_cache;
-    else
-        if(H5D__get_dxpl_cache_real(dxpl_id,*cache) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "Can't retrieve DXPL values")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* H5D__get_dxpl_cache() */
-
-
 /*-------------------------------------------------------------------------
- * Function:	H5D__create_named
- *
- * Purpose:	Internal routine to create a new dataset.
- *
- * Return:	Success:	Non-NULL, pointer to new dataset object.
+ * Function: H5D__create_named
  *
- *		Failure:	NULL
+ * Purpose:  Internal routine to create a new dataset.
  *
- * Programmer:	Quincey Koziol
- *		Thursday, April 5, 2007
+ * Return:   Success:    Non-NULL, pointer to new dataset object.
  *
+ *           Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5D_t *
 H5D__create_named(const H5G_loc_t *loc, const char *name, hid_t type_id,
-    const H5S_t *space, hid_t lcpl_id, hid_t dcpl_id, hid_t dapl_id,
-    hid_t dxpl_id)
+    const H5S_t *space, hid_t lcpl_id, hid_t dcpl_id, hid_t dapl_id)
 {
     H5O_obj_create_t ocrt_info;         /* Information for object creation */
     H5D_obj_create_t dcrt_info;         /* Information for dataset creation */
-    H5D_t	   *ret_value = NULL;   /* Return value */
+    H5D_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Check arguments */
     HDassert(loc);
@@ -474,7 +309,6 @@ H5D__create_named(const H5G_loc_t *loc, const char *name, hid_t type_id,
     HDassert(lcpl_id != H5P_DEFAULT);
     HDassert(dcpl_id != H5P_DEFAULT);
     HDassert(dapl_id != H5P_DEFAULT);
-    HDassert(dxpl_id != H5P_DEFAULT);
 
     /* Set up dataset creation info */
     dcrt_info.type_id = type_id;
@@ -488,7 +322,7 @@ H5D__create_named(const H5G_loc_t *loc, const char *name, hid_t type_id,
     ocrt_info.new_obj = NULL;
 
     /* Create the new dataset and link it to its parent group */
-    if(H5L_link_object(loc, name, &ocrt_info, lcpl_id, dapl_id, dxpl_id) < 0)
+    if(H5L_link_object(loc, name, &ocrt_info, lcpl_id) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to create and link to dataset")
     HDassert(ocrt_info.new_obj);
 
@@ -496,40 +330,78 @@ H5D__create_named(const H5G_loc_t *loc, const char *name, hid_t type_id,
     ret_value = (H5D_t *)ocrt_info.new_obj;
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5D__create_named() */
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5D__create_anon
+ *
+ * Purpose:     Internal routine to create a new anonymous dataset.
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              creating datasets that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:      Success:    Non-NULL, pointer to new dataset object.
+ *              Failure:    NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		December 9, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+H5D_t *
+H5D__create_anon(H5F_t *file, hid_t type_id, const H5S_t *space, hid_t dcpl_id,
+    hid_t dapl_id)
+{
+    H5D_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(file);
+    HDassert(type_id != H5P_DEFAULT);
+    HDassert(space);
+    HDassert(dcpl_id != H5P_DEFAULT);
+    HDassert(dapl_id != H5P_DEFAULT);
+
+    /* Build and open the dataset */
+    if(NULL == (ret_value = H5D__create(file, type_id, space, dcpl_id, dapl_id)))
+	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to create dataset")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5D__create_anon() */
+
+
+/*-------------------------------------------------------------------------
  * Function:    H5D__get_space_status
  *
  * Purpose:     Returns the status of dataspace allocation.
  *
  * Return:
  *              Success:        Non-negative
- *
  *              Failture:       Negative
- *
- * Programmer:  Raymond Lu
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__get_space_status(H5D_t *dset, H5D_space_status_t *allocation, hid_t dxpl_id)
+H5D__get_space_status(const H5D_t *dset, H5D_space_status_t *allocation)
 {
-    hsize_t     space_allocated;    /* The number of bytes allocated for chunks */
-    hssize_t    snelmts;            /* Temporary holder for number of elements in dataspace */
-    hsize_t     nelmts;             /* Number of elements in dataspace */
-    size_t      dt_size;            /* Size of datatype */
-    hsize_t     full_size;          /* The number of bytes in the dataset when fully populated */
     herr_t      ret_value = SUCCEED;
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_VOL
 
     HDassert(dset);
 
     /* Check for chunked layout */
     if(dset->shared->layout.type == H5D_CHUNKED) {
+        hsize_t     space_allocated;    /* The number of bytes allocated for chunks */
+        hssize_t    snelmts;            /* Temporary holder for number of elements in dataspace */
+        hsize_t     nelmts;             /* Number of elements in dataspace */
+        size_t      dt_size;            /* Size of datatype */
+        hsize_t     full_size;          /* The number of bytes in the dataset when fully populated */
+
         /* For chunked layout set the space status by the storage size */
         /* Get the dataset's dataspace */
         HDassert(dset->shared->space);
@@ -551,7 +423,7 @@ H5D__get_space_status(H5D_t *dset, H5D_space_status_t *allocation, hid_t dxpl_id
             HGOTO_ERROR(H5E_DATASET, H5E_OVERFLOW, FAIL, "size of dataset's storage overflowed")
 
         /* Difficult to error check, since the error value is 0 and 0 is a valid value... :-/ */
-        if(H5D__get_storage_size(dset, dxpl_id, &space_allocated) < 0)
+        if(H5D__get_storage_size_real(dset, &space_allocated) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get size of dataset's storage")
 
         /* Decide on how much of the space is allocated */
@@ -559,7 +431,7 @@ H5D__get_space_status(H5D_t *dset, H5D_space_status_t *allocation, hid_t dxpl_id
             *allocation = H5D_SPACE_STATUS_NOT_ALLOCATED;
         else if(space_allocated == full_size)
             *allocation = H5D_SPACE_STATUS_ALLOCATED;
-        else 
+        else
             *allocation = H5D_SPACE_STATUS_PART_ALLOCATED;
     } /* end if */
     else {
@@ -572,22 +444,17 @@ H5D__get_space_status(H5D_t *dset, H5D_space_status_t *allocation, hid_t dxpl_id
     } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5D__get_space_status() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__new
- *
- * Purpose:	Creates a new, empty dataset structure
- *
- * Return:	Success:	Pointer to a new dataset descriptor.
- *
- *		Failure:	NULL
+ * Function: H5D__new
  *
- * Programmer:	Quincey Koziol
- *		Monday, October 12, 1998
+ * Purpose:  Creates a new, empty dataset structure
  *
+ * Return:   Success:    Pointer to a new dataset descriptor.
+ *           Failure:    NULL
  *-------------------------------------------------------------------------
  */
 static H5D_shared_t *
@@ -638,26 +505,22 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__init_type
+ * Function: H5D__init_type
  *
- * Purpose:	Copy a datatype for a dataset's use, performing all the
+ * Purpose:  Copy a datatype for a dataset's use, performing all the
  *              necessary adjustments, etc.
  *
- * Return:	Success:    SUCCEED
- *		Failure:    FAIL
- *
- * Programmer:	Quincey Koziol
- *		Thursday, June 24, 2004
- *
+ * Return:   Success:    SUCCEED
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5D__init_type(H5F_t *file, const H5D_t *dset, hid_t type_id, const H5T_t *type)
 {
-    htri_t relocatable;                 /* Flag whether the type is relocatable */
-    htri_t immutable;                   /* Flag whether the type is immutable */
-    hbool_t use_latest_format;          /* Flag indicating the 'latest datatype version support' is enabled */
-    herr_t ret_value = SUCCEED;         /* Return value */
+    htri_t relocatable;            /* Flag whether the type is relocatable */
+    htri_t immutable;              /* Flag whether the type is immutable */
+    hbool_t use_at_least_v18;      /* Flag indicating to use at least v18 format versions */
+    herr_t ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
 
@@ -674,17 +537,17 @@ H5D__init_type(H5F_t *file, const H5D_t *dset, hid_t type_id, const H5T_t *type)
     if((immutable = H5T_is_immutable(type)) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "can't check datatype?")
 
-    /* Get the file's 'use the latest datatype version support' flag */
-    use_latest_format = H5F_USE_LATEST_FLAGS(file, H5F_LATEST_DATATYPE);
+    /* To use at least v18 format versions or not */
+    use_at_least_v18 = (H5F_LOW_BOUND(file) >= H5F_LIBVER_V18);
 
     /* Copy the datatype if it's a custom datatype or if it'll change when it's location is changed */
-    if(!immutable || relocatable || use_latest_format) {
+    if(!immutable || relocatable || use_at_least_v18) {
         /* Copy datatype for dataset */
         if((dset->shared->type = H5T_copy(type, H5T_COPY_ALL)) == NULL)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't copy datatype")
 
-	/* Convert a datatype (if committed) to a transient type if the committed datatype's file
-	   location is different from the file location where the dataset will be created */
+        /* Convert a datatype (if committed) to a transient type if the committed datatype's file
+           location is different from the file location where the dataset will be created */
         if(H5T_convert_committed_datatype(dset->shared->type, file) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't get shared datatype info")
 
@@ -692,14 +555,13 @@ H5D__init_type(H5F_t *file, const H5D_t *dset, hid_t type_id, const H5T_t *type)
         if(H5T_set_loc(dset->shared->type, file, H5T_LOC_DISK) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't set datatype location")
 
-        /* Set the latest format, if requested */
-        if(use_latest_format)
-            if(H5T_set_latest_version(dset->shared->type) < 0)
-                HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set latest version of datatype")
+        /* Set the version for datatype */
+       if(H5T_set_version(file, dset->shared->type) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set version of datatype")
 
         /* Get a datatype ID for the dataset's datatype */
-	if((dset->shared->type_id = H5I_register(H5I_DATATYPE, dset->shared->type, FALSE)) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register type")
+        if((dset->shared->type_id = H5I_register(H5I_DATATYPE, dset->shared->type, FALSE)) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register type")
     } /* end if */
     /* Not a custom datatype, just use it directly */
     else {
@@ -717,16 +579,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__cache_dataspace_info
+ * Function: H5D__cache_dataspace_info
  *
- * Purpose:	Cache dataspace info for a dataset
- *
- * Return:	Success:    SUCCEED
- *		Failure:    FAIL
- *
- * Programmer:	Quincey Koziol
- *		Wednesday, November 19, 2014
+ * Purpose:  Cache dataspace info for a dataset
  *
+ * Return:   Success:    SUCCEED
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -747,8 +605,13 @@ H5D__cache_dataspace_info(const H5D_t *dset)
     dset->shared->ndims = (unsigned)sndims;
 
     /* Compute the inital 'power2up' values */
-    for(u = 0; u < dset->shared->ndims; u++)
-        dset->shared->curr_power2up[u] = H5VM_power2up(dset->shared->curr_dims[u]);
+    for(u = 0; u < dset->shared->ndims; u++) {
+        hsize_t scaled_power2up;    /* Scaled value, rounded to next power of 2 */
+
+        if( !(scaled_power2up = H5VM_power2up(dset->shared->curr_dims[u])) )
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get the next power of 2")
+        dset->shared->curr_power2up[u] = scaled_power2up;
+    } /* end for */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -756,23 +619,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__init_space
+ * Function: H5D__init_space
  *
- * Purpose:	Copy a dataspace for a dataset's use, performing all the
+ * Purpose:  Copy a dataspace for a dataset's use, performing all the
  *              necessary adjustments, etc.
  *
- * Return:	Success:    SUCCEED
- *		Failure:    FAIL
- *
- * Programmer:	Quincey Koziol
- *		Tuesday, July 24, 2007
- *
+ * Return:   Success:    SUCCEED
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5D__init_space(H5F_t *file, const H5D_t *dset, const H5S_t *space)
 {
-    hbool_t use_latest_format;          /* Flag indicating the 'latest dataspace version support' is enabled */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -782,9 +640,6 @@ H5D__init_space(H5F_t *file, const H5D_t *dset, const H5S_t *space)
     HDassert(dset);
     HDassert(space);
 
-    /* Get the file's 'use the latest dataspace version support' flag */
-    use_latest_format = H5F_USE_LATEST_FLAGS(file, H5F_LATEST_DATASPACE);
-
     /* Copy dataspace for dataset */
     if(NULL == (dset->shared->space = H5S_copy(space, FALSE, TRUE)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't copy dataspace")
@@ -793,10 +648,9 @@ H5D__init_space(H5F_t *file, const H5D_t *dset, const H5S_t *space)
     if(H5D__cache_dataspace_info(dset) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't cache dataspace info")
 
-    /* Set the latest format, if requested */
-    if(use_latest_format)
-        if(H5S_set_latest_version(dset->shared->space) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set latest version of datatype")
+    /* Set the version for dataspace */
+    if(H5S_set_version(file, dset->shared->space) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set latest version of datatype")
 
     /* Set the dataset's dataspace to 'all' selection */
     if(H5S_select_all(dset->shared->space, TRUE) < 0)
@@ -808,30 +662,27 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__update_oh_info
- *
- * Purpose:	Create and fill object header for dataset
- *
- * Return:	Success:    SUCCEED
- *		Failure:    FAIL
+ * Function: H5D__update_oh_info
  *
- * Programmer:	Bill Wendling
- *		Thursday, October 31, 2002
+ * Purpose:  Create and fill object header for dataset
  *
+ * Return:   Success:    SUCCEED
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset, hid_t dapl_id)
+H5D__update_oh_info(H5F_t *file, H5D_t *dset, hid_t dapl_id)
 {
     H5O_t              *oh = NULL;      /* Pointer to dataset's object header */
     size_t              ohdr_size = H5D_MINHDR_SIZE;    /* Size of dataset's object header */
     H5O_loc_t          *oloc = NULL;    /* Dataset's object location */
     H5O_layout_t       *layout;         /* Dataset's layout information */
     H5T_t              *type;           /* Dataset's datatype */
-    H5O_fill_t		*fill_prop;     /* Pointer to dataset's fill value information */
-    H5D_fill_value_t	fill_status;    /* Fill value status */
-    hbool_t             fill_changed = FALSE;      /* Flag indicating the fill value was changed */
+    H5O_fill_t         *fill_prop;      /* Pointer to dataset's fill value information */
+    H5D_fill_value_t    fill_status;    /* Fill value status */
+    hbool_t             fill_changed = FALSE;   /* Flag indicating the fill value was changed */
     hbool_t             layout_init = FALSE;    /* Flag to indicate that chunk information was initialized */
+    hbool_t             use_at_least_v18;       /* Flag indicating to use at least v18 format versions */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -846,6 +697,9 @@ H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset, hid_t dapl_id)
     type = dset->shared->type;
     fill_prop = &dset->shared->dcpl_cache.fill;
 
+    /* To use at least v18 format versions or not */
+    use_at_least_v18 = (H5F_LOW_BOUND(file) >= H5F_LIBVER_V18);
+
     /* Retrieve "defined" status of fill value */
     if(H5P_is_fill_value_defined(fill_prop, &fill_status) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't tell if fill value defined")
@@ -869,13 +723,14 @@ H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset, hid_t dapl_id)
     /* Determine whether fill value is defined or not */
     if(fill_status == H5D_FILL_VALUE_DEFAULT || fill_status == H5D_FILL_VALUE_USER_DEFINED) {
         /* Convert fill value buffer to dataset's datatype */
-        if(fill_prop->buf && fill_prop->size > 0 && H5O_fill_convert(fill_prop, type, &fill_changed, dxpl_id) < 0)
+        if(fill_prop->buf && fill_prop->size > 0 && H5O_fill_convert(fill_prop, type, &fill_changed) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to convert fill value to dataset type")
 
-	fill_prop->fill_defined = TRUE;
-    } else if(fill_status == H5D_FILL_VALUE_UNDEFINED) {
- 	fill_prop->fill_defined = FALSE;
-    } else
+        fill_prop->fill_defined = TRUE;
+    } /* end if */
+    else if(fill_status == H5D_FILL_VALUE_UNDEFINED)
+        fill_prop->fill_defined = FALSE;
+    else
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to determine if fill value is defined")
 
     /* Check for invalid fill & allocation time setting */
@@ -901,29 +756,29 @@ H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset, hid_t dapl_id)
         ohdr_size += layout->storage.u.compact.size;
 
     /* Create an object header for the dataset */
-    if(H5O_create(file, dxpl_id, ohdr_size, (size_t)1, dset->shared->dcpl_id, oloc/*out*/) < 0)
+    if(H5O_create(file, ohdr_size, (size_t)1, dset->shared->dcpl_id, oloc/*out*/) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to create dataset object header")
     HDassert(file == dset->oloc.file);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(oloc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(oloc)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTPIN, FAIL, "unable to pin dataset object header")
 
     /* Write the dataspace header message */
-    if(H5S_append(file, dxpl_id, oh, dset->shared->space) < 0)
+    if(H5S_append(file, oh, dset->shared->space) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update dataspace header message")
 
     /* Write the datatype header message */
-    if(H5O_msg_append_oh(file, dxpl_id, oh, H5O_DTYPE_ID, H5O_MSG_FLAG_CONSTANT, 0, type) < 0)
+    if(H5O_msg_append_oh(file, oh, H5O_DTYPE_ID, H5O_MSG_FLAG_CONSTANT, 0, type) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update datatype header message")
 
     /* Write new fill value message */
-    if(H5O_msg_append_oh(file, dxpl_id, oh, H5O_FILL_NEW_ID, H5O_MSG_FLAG_CONSTANT, 0, fill_prop) < 0)
+    if(H5O_msg_append_oh(file, oh, H5O_FILL_NEW_ID, H5O_MSG_FLAG_CONSTANT, 0, fill_prop) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update new fill value header message")
 
     /* If there is valid information for the old fill value struct, add it */
-    /* (only if we aren't trying to write the 'latest fill message version support') */
-    if(fill_prop->buf && !(H5F_USE_LATEST_FLAGS(file, H5F_LATEST_FILL_MSG))) {
+    /* (only if we aren't using v18 format versions and above */
+    if(fill_prop->buf && !use_at_least_v18) {
         H5O_fill_t old_fill_prop;       /* Copy of fill value property, for writing as "old" fill value */
 
         /* Shallow copy the fill value property */
@@ -934,12 +789,12 @@ H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset, hid_t dapl_id)
         H5O_msg_reset_share(H5O_FILL_ID, &old_fill_prop);
 
         /* Write old fill value */
-        if(H5O_msg_append_oh(file, dxpl_id, oh, H5O_FILL_ID, H5O_MSG_FLAG_CONSTANT, 0, &old_fill_prop) < 0)
+        if(H5O_msg_append_oh(file, oh, H5O_FILL_ID, H5O_MSG_FLAG_CONSTANT, 0, &old_fill_prop) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update old fill value header message")
     } /* end if */
 
     /* Update/create the layout (and I/O pipeline & EFL) messages */
-    if(H5D__layout_oh_create(file, dxpl_id, oh, dset, dapl_id) < 0)
+    if(H5D__layout_oh_create(file, oh, dset, dapl_id) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update layout/pline/efl header message")
 
     /* Indicate that the layout information was initialized */
@@ -958,28 +813,28 @@ H5D__update_oh_info(H5F_t *file, hid_t dxpl_id, H5D_t *dset, hid_t dapl_id)
         (H5P_exist_plist(dc_plist, H5O_BOGUS_MSG_ID_NAME) > 0) ) {
 
         uint8_t bogus_flags = 0;        /* Flags for creating "bogus" message */
-	unsigned bogus_id;		/* "bogus" ID */
+        unsigned bogus_id;        /* "bogus" ID */
 
-	/* Retrieve "bogus" message ID */
+        /* Retrieve "bogus" message ID */
         if(H5P_get(dc_plist, H5O_BOGUS_MSG_ID_NAME, &bogus_id) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get bogus ID options")
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get bogus ID options")
         /* Retrieve "bogus" message flags */
         if(H5P_get(dc_plist, H5O_BOGUS_MSG_FLAGS_NAME, &bogus_flags) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get bogus message options")
 
         /* Add a "bogus" message (for error testing). */
-	if(H5O_bogus_oh(file, dxpl_id, oh, bogus_id, (unsigned)bogus_flags) < 0)
+        if(H5O_bogus_oh(file, oh, bogus_id, (unsigned)bogus_flags) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to create 'bogus' message")
     } /* end if */
 }
 #endif /* H5O_ENABLE_BOGUS */
 
     /* Add a modification time message, if using older format. */
-    /* (If using the latest 'no modification time message' version support, the modification time is part of the object
+    /* (If using v18 format versions and above, the the modification time is part of the object
      *  header and doesn't use a separate message -QAK)
      */
-    if(!(H5F_USE_LATEST_FLAGS(file, H5F_LATEST_NO_MOD_TIME_MSG)))
-        if(H5O_touch_oh(file, dxpl_id, oh, TRUE) < 0)
+    if(!use_at_least_v18)
+        if(H5O_touch_oh(file, oh, TRUE) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update modification time message")
 
 done:
@@ -992,57 +847,60 @@ done:
     if(ret_value < 0)
         if(layout_init)
             /* Destroy the layout information for the dataset */
-            if(dset->shared->layout.ops->dest && (dset->shared->layout.ops->dest)(dset, dxpl_id) < 0)
+            if(dset->shared->layout.ops->dest && (dset->shared->layout.ops->dest)(dset) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to destroy layout info")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__update_oh_info() */
 
 
+
 /*--------------------------------------------------------------------------
- * Function:    H5D_build_extfile_prefix
+ * Function:    H5D__build_file_prefix
  *
- * Purpose:     Determine the external file prefix to be used and store
- *              it in extfile_prefix. Stores an empty string if no prefix
+ * Purpose:     Determine the file prefix to be used and store
+ *              it in file_prefix. Stores an empty string if no prefix
  *              should be used.
  *
  * Return:      SUCCEED/FAIL
- *
- * Programmer:  Steffen Kiess
- *              October 16, 2015
  *--------------------------------------------------------------------------
  */
 static herr_t
-H5D_build_extfile_prefix(const H5D_t *dset, hid_t dapl_id, char **extfile_prefix /*out*/)
+H5D__build_file_prefix(const H5D_t *dset, hid_t dapl_id, const char *prefix_type,
+    char **file_prefix /*out*/)
 {
     char            *prefix = NULL;       /* prefix used to look for the file               */
-    char            *extpath = NULL;      /* absolute path of directory the HDF5 file is in */
-    size_t          extpath_len;          /* length of extpath                              */
+    char            *filepath = NULL;     /* absolute path of directory the HDF5 file is in */
+    size_t          filepath_len;         /* length of file path                            */
     size_t          prefix_len;           /* length of prefix                               */
-    size_t          extfile_prefix_len;   /* length of expanded prefix                      */
+    size_t          file_prefix_len;      /* length of expanded prefix                      */
     H5P_genplist_t  *plist = NULL;        /* Property list pointer                          */
     herr_t          ret_value = SUCCEED;  /* Return value                                   */
-    
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
+    /* Sanity checks */
     HDassert(dset);
     HDassert(dset->oloc.file);
-
-    extpath = H5F_EXTPATH(dset->oloc.file);
-    HDassert(extpath);
+    filepath = H5F_EXTPATH(dset->oloc.file);
+    HDassert(filepath);
 
     /* XXX: Future thread-safety note - getenv is not required
      *      to be reentrant.
      */
-    prefix = HDgetenv("HDF5_EXTFILE_PREFIX");
+    if(HDstrcmp(prefix_type, H5D_ACS_VDS_PREFIX_NAME) == 0)
+        prefix = HDgetenv("HDF5_VDS_PREFIX");
+    else if (HDstrcmp(prefix_type, H5D_ACS_EFILE_PREFIX_NAME) == 0)
+        prefix = HDgetenv("HDF5_EXTFILE_PREFIX");
+    else
+        HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "prefix name is not sensible")
 
     if(prefix == NULL || *prefix == '\0') {
-        /* Set prefix to value of H5D_ACS_EFILE_PREFIX_NAME property */
+        /* Set prefix to value of prefix_type property */
         if(NULL == (plist = H5P_object_verify(dapl_id, H5P_DATASET_ACCESS)))
             HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
-        if(H5P_peek(plist, H5D_ACS_EFILE_PREFIX_NAME, &prefix) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get external file prefix")
+        if(H5P_peek(plist, prefix_type, &prefix) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get file prefix")
     } /* end if */
 
     /* Prefix has to be checked for NULL / empty string again because the
@@ -1052,58 +910,53 @@ H5D_build_extfile_prefix(const H5D_t *dset, hid_t dapl_id, char **extfile_prefix
         /* filename is interpreted as relative to the current directory,
          * does not need to be expanded
          */
-        if(NULL == (*extfile_prefix = (char *)H5MM_strdup("")))
+        if(NULL == (*file_prefix = (char *)H5MM_strdup("")))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
     } /* end if */
     else {
         if (HDstrncmp(prefix, "${ORIGIN}", HDstrlen("${ORIGIN}")) == 0) {
             /* Replace ${ORIGIN} at beginning of prefix by directory of HDF5 file */
-            extpath_len = HDstrlen(extpath);
+            filepath_len = HDstrlen(filepath);
             prefix_len = HDstrlen(prefix);
-            extfile_prefix_len = extpath_len + prefix_len - HDstrlen("${ORIGIN}") + 1;
-        
-            if(NULL == (*extfile_prefix = (char *)H5MM_malloc(extfile_prefix_len)))
+            file_prefix_len = filepath_len + prefix_len - HDstrlen("${ORIGIN}") + 1;
+
+            if(NULL == (*file_prefix = (char *)H5MM_malloc(file_prefix_len)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate buffer")
-            HDsnprintf(*extfile_prefix, extfile_prefix_len, "%s%s", extpath, prefix + HDstrlen("${ORIGIN}"));
+            HDsnprintf(*file_prefix, file_prefix_len, "%s%s", filepath, prefix + HDstrlen("${ORIGIN}"));
         } /* end if */
         else {
-            if(NULL == (*extfile_prefix = (char *)H5MM_strdup(prefix)))
+            if(NULL == (*file_prefix = (char *)H5MM_strdup(prefix)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
         } /* end else */
     } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5D_build_extfile_prefix() */
+} /* H5D__build_file_prefix() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__create
- *
- * Purpose:	Creates a new dataset with name NAME in file F and associates
- *		with it a datatype TYPE for each element as stored in the
- *		file, dimensionality information or dataspace SPACE, and
- *		other miscellaneous properties CREATE_PARMS.  All arguments
- *		are deep-copied before being associated with the new dataset,
- *		so the caller is free to subsequently modify them without
- *		affecting the dataset.
- *
- * Return:	Success:	Pointer to a new dataset
- *
- *		Failure:	NULL
- *
- * Programmer:	Robb Matzke
- *		Thursday, December  4, 1997
- *
+ * Function:    H5D__create
+ *
+ * Purpose:    Creates a new dataset with name NAME in file F and associates
+ *        with it a datatype TYPE for each element as stored in the
+ *        file, dimensionality information or dataspace SPACE, and
+ *        other miscellaneous properties CREATE_PARMS.  All arguments
+ *        are deep-copied before being associated with the new dataset,
+ *        so the caller is free to subsequently modify them without
+ *        affecting the dataset.
+ *
+ * Return:    Success:    Pointer to a new dataset
+ *            Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5D_t *
 H5D__create(H5F_t *file, hid_t type_id, const H5S_t *space, hid_t dcpl_id,
-    hid_t dapl_id, hid_t dxpl_id)
+    hid_t dapl_id)
 {
-    const H5T_t         *type;                  /* Datatype for dataset */
-    H5D_t		*new_dset = NULL;
-    H5P_genplist_t 	*dc_plist = NULL;       /* New Property list */
+    const H5T_t        *type;                   /* Datatype for dataset */
+    H5D_t              *new_dset = NULL;
+    H5P_genplist_t     *dc_plist = NULL;        /* New Property list */
     hbool_t             has_vl_type = FALSE;    /* Flag to indicate a VL-type for dataset */
     hbool_t             layout_init = FALSE;    /* Flag to indicate that chunk information was initialized */
     hbool_t             layout_copied = FALSE;  /* Flag to indicate that layout message was copied */
@@ -1111,7 +964,7 @@ H5D__create(H5F_t *file, hid_t type_id, const H5S_t *space, hid_t dcpl_id,
     hbool_t             pline_copied = FALSE;   /* Flag to indicate that pipeline message was copied */
     hbool_t             efl_copied = FALSE;     /* Flag to indicate that external file list message was copied */
     H5G_loc_t           dset_loc;               /* Dataset location */
-    H5D_t		*ret_value = NULL;      /* Return value */
+    H5D_t              *ret_value = NULL;       /* Return value */
 
     FUNC_ENTER_PACKAGE
 
@@ -1120,7 +973,6 @@ H5D__create(H5F_t *file, hid_t type_id, const H5S_t *space, hid_t dcpl_id,
     HDassert(H5I_DATATYPE == H5I_get_type(type_id));
     HDassert(space);
     HDassert(H5I_GENPROP_LST == H5I_get_type(dcpl_id));
-    HDassert(H5I_GENPROP_LST == H5I_get_type(dxpl_id));
 
     /* Get the dataset's datatype */
     if(NULL == (type = (const H5T_t *)H5I_object(type_id)))
@@ -1210,33 +1062,22 @@ H5D__create(H5F_t *file, hid_t type_id, const H5S_t *space, hid_t dcpl_id,
         /* Don't allow compact datasets to allocate space later */
         if(layout->type == H5D_COMPACT && fill->alloc_time != H5D_ALLOC_TIME_EARLY)
             HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, NULL, "compact dataset must have early space allocation")
-
-        /* If MPI VFD is used, no filter support yet. */
-        if(H5F_HAS_FEATURE(file, H5FD_FEAT_HAS_MPI) && pline->nused > 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, NULL, "Parallel I/O does not support filters yet")
     } /* end if */
 
-    /* Set the latest version of the layout, pline & fill messages, if requested */
-    if(H5F_USE_LATEST_FLAGS(file, H5F_LATEST_DSET_MSG_FLAGS)) {
-        /* Set the latest version for the I/O pipeline message */
-	if(H5F_USE_LATEST_FLAGS(file, H5F_LATEST_PLINE_MSG))
-	    if(H5O_pline_set_latest_version(&new_dset->shared->dcpl_cache.pline) < 0)
-		HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of I/O filter pipeline")
-
-        /* Set the latest version for the fill message */
-	if(H5F_USE_LATEST_FLAGS(file, H5F_LATEST_FILL_MSG))
-	    /* Set the latest version for the fill value message */
-	    if(H5O_fill_set_latest_version(&new_dset->shared->dcpl_cache.fill) < 0)
-		HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of fill value")
-
-        /* Set the latest version for the layout message */
-	if(H5F_USE_LATEST_FLAGS(file, H5F_LATEST_LAYOUT_MSG))
-	    /* Set the latest version for the layout message */
-	    if(H5D__layout_set_latest_version(&new_dset->shared->layout, new_dset->shared->space, &new_dset->shared->dcpl_cache) < 0)
-		HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of layout")
-    } /* end if */
-    else if(new_dset->shared->layout.version >= H5O_LAYOUT_VERSION_4) {
-	/* Use latest indexing type for layout message version >= 4 */
+    /* Set the version for the I/O pipeline message */
+    if(H5O_pline_set_version(file, &new_dset->shared->dcpl_cache.pline) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of I/O filter pipeline")
+
+    /* Set the version for the fill message */
+    if(H5O_fill_set_version(file, &new_dset->shared->dcpl_cache.fill) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of fill value")
+
+    /* Set the latest version for the layout message */
+    if(H5D__layout_set_version(file, &new_dset->shared->layout) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest version of layout")
+
+    if(new_dset->shared->layout.version >= H5O_LAYOUT_VERSION_4) {
+        /* Use latest indexing type for layout message version >= 4 */
         if(H5D__layout_set_latest_indexing(&new_dset->shared->layout, new_dset->shared->space, &new_dset->shared->dcpl_cache) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, NULL, "can't set latest indexing")
     } /* end if */
@@ -1254,7 +1095,7 @@ H5D__create(H5F_t *file, hid_t type_id, const H5S_t *space, hid_t dcpl_id,
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to construct layout information")
 
     /* Update the dataset's object header info. */
-    if(H5D__update_oh_info(file, dxpl_id, new_dset, dapl_id) < 0)
+    if(H5D__update_oh_info(file, new_dset, dapl_id) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "can't update the metadata cache")
 
     /* Indicate that the layout information was initialized */
@@ -1262,12 +1103,16 @@ H5D__create(H5F_t *file, hid_t type_id, const H5S_t *space, hid_t dcpl_id,
 
     /* Set up append flush parameters for the dataset */
     if(H5D__append_flush_setup(new_dset, dapl_id) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to set up flush append property")
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to set up flush append property")
 
     /* Set the external file prefix */
-    if(H5D_build_extfile_prefix(new_dset, dapl_id, &new_dset->shared->extfile_prefix) < 0)
+    if(H5D__build_file_prefix(new_dset, dapl_id, H5D_ACS_EFILE_PREFIX_NAME, &new_dset->shared->extfile_prefix) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to initialize external file prefix")
 
+    /* Set the VDS file prefix */
+    if(H5D__build_file_prefix(new_dset, dapl_id, H5D_ACS_VDS_PREFIX_NAME, &new_dset->shared->vds_prefix) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to initialize VDS prefix")
+
     /* Add the dataset to the list of opened objects in the file */
     if(H5FO_top_incr(new_dset->oloc.file, new_dset->oloc.addr) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINC, NULL, "can't incr object ref. count")
@@ -1282,7 +1127,7 @@ done:
     if(!ret_value && new_dset && new_dset->shared) {
         if(new_dset->shared) {
             if(layout_init)
-                if(new_dset->shared->layout.ops->dest && (new_dset->shared->layout.ops->dest)(new_dset, dxpl_id) < 0)
+                if(new_dset->shared->layout.ops->dest && (new_dset->shared->layout.ops->dest)(new_dset) < 0)
                     HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, NULL, "unable to destroy layout info")
             if(pline_copied)
                 if(H5O_msg_reset(H5O_PLINE_ID, &new_dset->shared->dcpl_cache.pline) < 0)
@@ -1301,18 +1146,19 @@ done:
             if(new_dset->shared->type && H5I_dec_ref(new_dset->shared->type_id) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, NULL, "unable to release datatype")
             if(H5F_addr_defined(new_dset->oloc.addr)) {
-                if(H5O_dec_rc_by_loc(&(new_dset->oloc), dxpl_id) < 0)
+                if(H5O_dec_rc_by_loc(&(new_dset->oloc)) < 0)
                     HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, NULL, "unable to decrement refcount on newly created object")
                 if(H5O_close(&(new_dset->oloc), NULL) < 0)
                     HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, NULL, "unable to release object header")
                 if(file) {
-                    if(H5O_delete(file, dxpl_id, new_dset->oloc.addr) < 0)
+                    if(H5O_delete(file, new_dset->oloc.addr) < 0)
                         HDONE_ERROR(H5E_DATASET, H5E_CANTDELETE, NULL, "unable to delete object header")
                 } /* end if */
             } /* end if */
             if(new_dset->shared->dcpl_id != 0 && H5I_dec_ref(new_dset->shared->dcpl_id) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, NULL, "unable to decrement ref count on property list")
             new_dset->shared->extfile_prefix = (char *)H5MM_xfree(new_dset->shared->extfile_prefix);
+            new_dset->shared->vds_prefix = (char *)H5MM_xfree(new_dset->shared->vds_prefix);
             new_dset->shared = H5FL_FREE(H5D_shared_t, new_dset->shared);
         } /* end if */
         new_dset->oloc.file = NULL;
@@ -1330,15 +1176,10 @@ done:
  *
  * Return:      Success:        Ptr to a new dataset.
  *              Failure:        NULL
- *
- * Programmer:  Neil Fortner
- *              Friday, March 6, 2015
- *
  *-------------------------------------------------------------------------
  */
 H5D_t *
-H5D__open_name(const H5G_loc_t *loc, const char *name, hid_t dapl_id,
-    hid_t dxpl_id)
+H5D__open_name(const H5G_loc_t *loc, const char *name, hid_t dapl_id)
 {
     H5D_t       *dset = NULL;
     H5G_loc_t   dset_loc;               /* Object location of dataset */
@@ -1348,7 +1189,7 @@ H5D__open_name(const H5G_loc_t *loc, const char *name, hid_t dapl_id,
     hbool_t     loc_found = FALSE;      /* Location at 'name' found */
     H5D_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Check args */
     HDassert(loc);
@@ -1360,18 +1201,18 @@ H5D__open_name(const H5G_loc_t *loc, const char *name, hid_t dapl_id,
     H5G_loc_reset(&dset_loc);
 
     /* Find the dataset object */
-    if(H5G_loc_find(loc, name, &dset_loc, dapl_id, dxpl_id) < 0)
+    if(H5G_loc_find(loc, name, &dset_loc) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, NULL, "not found")
     loc_found = TRUE;
 
     /* Check that the object found is the correct type */
-    if(H5O_obj_type(&oloc, &obj_type, dxpl_id) < 0)
+    if(H5O_obj_type(&oloc, &obj_type) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, NULL, "can't get object type")
     if(obj_type != H5O_TYPE_DATASET)
         HGOTO_ERROR(H5E_DATASET, H5E_BADTYPE, NULL, "not a dataset")
 
     /* Open the dataset */
-    if(NULL == (dset = H5D_open(&dset_loc, dapl_id, dxpl_id)))
+    if(NULL == (dset = H5D_open(&dset_loc, dapl_id)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "can't open dataset")
 
     /* Set return value */
@@ -1382,31 +1223,28 @@ done:
         if(loc_found && H5G_loc_free(&dset_loc) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, NULL, "can't free location")
 
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5D__open_name() */
 
 
 /*
  *-------------------------------------------------------------------------
- * Function:	H5D_open
+ * Function: H5D_open
  *
- * Purpose:	Checks if dataset is already open, or opens a dataset for
+ * Purpose:  Checks if dataset is already open, or opens a dataset for
  *              access.
  *
- * Return:	Success:	Dataset ID
- *		Failure:	FAIL
- *
- * Programmer:	Quincey Koziol
- *		Friday, December 20, 2002
- *
+ * Return:   Success:    Dataset ID
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 H5D_t *
-H5D_open(const H5G_loc_t *loc, hid_t dapl_id, hid_t dxpl_id)
+H5D_open(const H5G_loc_t *loc, hid_t dapl_id)
 {
     H5D_shared_t    *shared_fo = NULL;
     H5D_t           *dataset = NULL;
     char            *extfile_prefix = NULL;  /* Expanded external file prefix */
+    char            *vds_prefix = NULL;      /* Expanded vds prefix */
     H5D_t           *ret_value = NULL;       /* Return value */
 
     FUNC_ENTER_NOAPI(NULL)
@@ -1427,16 +1265,20 @@ H5D_open(const H5G_loc_t *loc, hid_t dapl_id, hid_t dxpl_id)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, NULL, "can't copy path")
 
     /* Get the external file prefix */
-    if(H5D_build_extfile_prefix(dataset, dapl_id, &extfile_prefix) < 0)
+    if(H5D__build_file_prefix(dataset, dapl_id, H5D_ACS_EFILE_PREFIX_NAME, &extfile_prefix) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to initialize external file prefix")
 
+    /* Get the VDS prefix */
+    if(H5D__build_file_prefix(dataset, dapl_id, H5D_ACS_VDS_PREFIX_NAME, &vds_prefix) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to initialize VDS prefix")
+
     /* Check if dataset was already open */
     if(NULL == (shared_fo = (H5D_shared_t *)H5FO_opened(dataset->oloc.file, dataset->oloc.addr))) {
         /* Clear any errors from H5FO_opened() */
         H5E_clear_stack(NULL);
 
         /* Open the dataset object */
-        if(H5D__open_oid(dataset, dapl_id, dxpl_id) < 0)
+        if(H5D__open_oid(dataset, dapl_id) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, NULL, "not found")
 
         /* Add the dataset to the list of opened objects in the file */
@@ -1455,6 +1297,11 @@ H5D_open(const H5G_loc_t *loc, hid_t dapl_id, hid_t dxpl_id)
         /* Prevent string from being freed during done: */
         extfile_prefix = NULL;
 
+        /* Set the vds file prefix */
+        dataset->shared->vds_prefix = vds_prefix;
+        /* Prevent string from being freed during done: */
+        vds_prefix = NULL;
+
     } /* end if */
     else {
         /* Point to shared info */
@@ -1486,14 +1333,16 @@ H5D_open(const H5G_loc_t *loc, hid_t dapl_id, hid_t dxpl_id)
 
 done:
     extfile_prefix = (char *)H5MM_xfree(extfile_prefix);
+    vds_prefix = (char *)H5MM_xfree(vds_prefix);
 
     if(ret_value == NULL) {
         /* Free the location--casting away const*/
         if(dataset) {
             if(shared_fo == NULL && dataset->shared) {   /* Need to free shared fo */
                 dataset->shared->extfile_prefix = (char *)H5MM_xfree(dataset->shared->extfile_prefix);
+                dataset->shared->vds_prefix = (char *)H5MM_xfree(dataset->shared->vds_prefix);
                 dataset->shared = H5FL_FREE(H5D_shared_t, dataset->shared);
-            }
+            } /* end if */
 
             H5O_loc_free(&(dataset->oloc));
             H5G_name_free(&(dataset->path));
@@ -1510,19 +1359,15 @@ done:
 
 /*
  *-------------------------------------------------------------------------
- * Function:	H5D__flush_append_setup
- *
- * Purpose:	Set the append flush parameters for a dataset
+ * Function: H5D__flush_append_setup
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Vailin Choi
- *		Wednesday, January 8, 2014
+ * Purpose:  Set the append flush parameters for a dataset
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__append_flush_setup(H5D_t *dset, hid_t dapl_id) 
+H5D__append_flush_setup(H5D_t *dset, hid_t dapl_id)
 {
     herr_t ret_value = SUCCEED;         /* return value */
 
@@ -1539,47 +1384,47 @@ H5D__append_flush_setup(H5D_t *dset, hid_t dapl_id)
     if(dapl_id != H5P_DATASET_ACCESS_DEFAULT && dset->shared->layout.type == H5D_CHUNKED) {
         H5P_genplist_t *dapl;               /* data access property list object pointer */
 
-	/* Get dataset access property list */
-	if(NULL == (dapl = (H5P_genplist_t *)H5I_object(dapl_id)))
-	    HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for dapl ID");
+        /* Get dataset access property list */
+        if(NULL == (dapl = (H5P_genplist_t *)H5I_object(dapl_id)))
+            HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for dapl ID");
 
-	/* Check if append flush property exists */
-	if(H5P_exist_plist(dapl, H5D_ACS_APPEND_FLUSH_NAME) > 0) {
+        /* Check if append flush property exists */
+        if(H5P_exist_plist(dapl, H5D_ACS_APPEND_FLUSH_NAME) > 0) {
             H5D_append_flush_t info;
 
-	    /* Get append flush property */
-	    if(H5P_get(dapl, H5D_ACS_APPEND_FLUSH_NAME, &info) < 0)
-		HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get append flush info")
-	    if(info.ndims > 0) {
-                hsize_t curr_dims[H5S_MAX_RANK];	/* current dimension sizes */
-                hsize_t max_dims[H5S_MAX_RANK];		/* current dimension sizes */
-                int rank;                       	/* dataspace # of dimensions */
-                unsigned u;     			/* local index variable */
-
-		/* Get dataset rank */
-		if((rank = H5S_get_simple_extent_dims(dset->shared->space, curr_dims, max_dims)) < 0)
-		    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
-		if(info.ndims != (unsigned)rank)
-		    HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "boundary dimension rank does not match dataset rank")
-
-		/* Validate boundary sizes */
-		for(u = 0; u < info.ndims; u++)
-		    if(info.boundary[u] != 0) /* when a non-zero boundary is set */
-			/* the dimension is extendible? */
-			if(max_dims[u] != H5S_UNLIMITED && max_dims[u] == curr_dims[u])
-			    break;
+            /* Get append flush property */
+            if(H5P_get(dapl, H5D_ACS_APPEND_FLUSH_NAME, &info) < 0)
+                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get append flush info")
+            if(info.ndims > 0) {
+                hsize_t curr_dims[H5S_MAX_RANK];    /* current dimension sizes */
+                hsize_t max_dims[H5S_MAX_RANK];     /* current dimension sizes */
+                int rank;                           /* dataspace # of dimensions */
+                unsigned u;                         /* local index variable */
+
+                /* Get dataset rank */
+                if((rank = H5S_get_simple_extent_dims(dset->shared->space, curr_dims, max_dims)) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset dimensions")
+                if(info.ndims != (unsigned)rank)
+                    HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "boundary dimension rank does not match dataset rank")
+
+                /* Validate boundary sizes */
+                for(u = 0; u < info.ndims; u++)
+                    if(info.boundary[u] != 0) /* when a non-zero boundary is set */
+                        /* the dimension is extendible? */
+                        if(max_dims[u] != H5S_UNLIMITED && max_dims[u] == curr_dims[u])
+                            break;
 
                 /* At least one boundary dimension is not extendible */
-		if(u != info.ndims)
-		    HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "boundary dimension is not valid")
+                if(u != info.ndims)
+                    HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "boundary dimension is not valid")
 
                 /* Copy append flush settings */
-		dset->shared->append_flush.ndims = info.ndims;
-		dset->shared->append_flush.func = info.func;
-		dset->shared->append_flush.udata = info.udata;
-		HDmemcpy(dset->shared->append_flush.boundary, info.boundary, sizeof(info.boundary));
-	    } /* end if */
-	} /* end if */
+                dset->shared->append_flush.ndims = info.ndims;
+                dset->shared->append_flush.func = info.func;
+                dset->shared->append_flush.udata = info.udata;
+                HDmemcpy(dset->shared->append_flush.boundary, info.boundary, sizeof(info.boundary));
+            } /* end if */
+        } /* end if */
     } /* end if */
 
 done:
@@ -1588,28 +1433,24 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__open_oid
- *
- * Purpose:	Opens a dataset for access.
+ * Function: H5D__open_oid
  *
- * Return:	Dataset pointer on success, NULL on failure
- *
- * Programmer:	Quincey Koziol
- *		Monday, October 12, 1998
+ * Purpose:  Opens a dataset for access.
  *
+ * Return:   Dataset pointer on success, NULL on failure
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id)
+H5D__open_oid(H5D_t *dataset, hid_t dapl_id)
 {
     H5P_genplist_t *plist;              /* Property list */
     H5O_fill_t *fill_prop;              /* Pointer to dataset's fill value info */
     unsigned alloc_time_state;          /* Allocation time state */
     htri_t msg_exists;                  /* Whether a particular type of message exists */
-    hbool_t layout_init = FALSE;    	/* Flag to indicate that chunk information was initialized */
-    herr_t ret_value = SUCCEED;		/* Return value */
+    hbool_t layout_init = FALSE;        /* Flag to indicate that chunk information was initialized */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, dataset->oloc.addr, FAIL)
+    FUNC_ENTER_STATIC_TAG(dataset->oloc.addr)
 
     /* check args */
     HDassert(dataset);
@@ -1623,13 +1464,13 @@ H5D__open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open")
 
     /* Get the type and space */
-    if(NULL == (dataset->shared->type = (H5T_t *)H5O_msg_read(&(dataset->oloc), H5O_DTYPE_ID, NULL, dxpl_id)))
+    if(NULL == (dataset->shared->type = (H5T_t *)H5O_msg_read(&(dataset->oloc), H5O_DTYPE_ID, NULL)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to load type info from dataset header")
 
     if(H5T_set_loc(dataset->shared->type, dataset->oloc.file, H5T_LOC_DISK) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "invalid datatype location")
 
-    if(NULL == (dataset->shared->space = H5S_read(&(dataset->oloc), dxpl_id)))
+    if(NULL == (dataset->shared->space = H5S_read(&(dataset->oloc))))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to load dataspace info from dataset header")
 
     /* Cache the dataset's dataspace info */
@@ -1645,7 +1486,7 @@ H5D__open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get dataset creation property list")
 
     /* Get the layout/pline/efl message information */
-    if(H5D__layout_oh_read(dataset, dxpl_id, dapl_id, plist) < 0)
+    if(H5D__layout_oh_read(dataset, dapl_id, plist) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get layout/pline/efl info")
 
     /* Indicate that the layout information was initialized */
@@ -1653,24 +1494,24 @@ H5D__open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id)
 
     /* Set up flush append property */
     if(H5D__append_flush_setup(dataset, dapl_id))
-	HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set up flush append property")
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set up flush append property")
 
     /* Point at dataset's copy, to cache it for later */
     fill_prop = &dataset->shared->dcpl_cache.fill;
 
     /* Try to get the new fill value message from the object header */
-    if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_FILL_NEW_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_FILL_NEW_ID)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't check if message exists")
     if(msg_exists) {
-        if(NULL == H5O_msg_read(&(dataset->oloc), H5O_FILL_NEW_ID, fill_prop, dxpl_id))
+        if(NULL == H5O_msg_read(&(dataset->oloc), H5O_FILL_NEW_ID, fill_prop))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve message")
     } /* end if */
     else {
-	/* For backward compatibility, try to retrieve the old fill value message */
-        if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_FILL_ID, dxpl_id)) < 0)
+    /* For backward compatibility, try to retrieve the old fill value message */
+        if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_FILL_ID)) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't check if message exists")
         if(msg_exists) {
-            if(NULL == H5O_msg_read(&(dataset->oloc), H5O_FILL_ID, fill_prop, dxpl_id))
+            if(NULL == H5O_msg_read(&(dataset->oloc), H5O_FILL_ID, fill_prop))
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve message")
         } /* end if */
         else {
@@ -1729,8 +1570,6 @@ H5D__open_oid(H5D_t *dataset, hid_t dapl_id, hid_t dxpl_id)
         H5D_io_info_t io_info;
 
         io_info.dset = dataset;
-        io_info.raw_dxpl_id = H5AC_rawdata_dxpl_id;
-        io_info.md_dxpl_id = dxpl_id;
 
         if(H5D__alloc_storage(&io_info, H5D_ALLOC_OPEN, FALSE, NULL) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize file storage")
@@ -1741,8 +1580,8 @@ done:
         if(H5F_addr_defined(dataset->oloc.addr) && H5O_close(&(dataset->oloc), NULL) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release object header")
         if(dataset->shared) {
-	    if(layout_init)
-                if(dataset->shared->layout.ops->dest && (dataset->shared->layout.ops->dest)(dataset, dxpl_id) < 0)
+            if(layout_init)
+                if(dataset->shared->layout.ops->dest && (dataset->shared->layout.ops->dest)(dataset) < 0)
                     HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to destroy layout info")
             if(dataset->shared->space && H5S_close(dataset->shared->space) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release dataspace")
@@ -1752,29 +1591,55 @@ done:
                         HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release datatype")
                 } /* end if */
                 else {
-                    if(H5T_close(dataset->shared->type) < 0)
+                    if(H5T_close_real(dataset->shared->type) < 0)
                         HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release datatype")
                 } /* end else */
             } /* end if */
         } /* end if */
     } /* end if */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__open_oid() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_close
+ * Function: H5D__close_cb
  *
- * Purpose:	Insures that all data has been saved to the file, closes the
- *		dataset object header, and frees all resources used by the
- *		descriptor.
+ * Purpose:  Callback routine for closing a dataset ID.  Closes the dataset
+ *           object that was attached to the ID.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:   Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		Thursday, December  4, 1997
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__close_cb(H5D_t *dataset)
+{
+    herr_t ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* check args */
+    HDassert(dataset && dataset->oloc.file && dataset->shared);
+    HDassert(dataset->shared->fo_count > 0);
+
+    /* Call actual dataset close routine */
+    if(H5D_close(dataset) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "can't close dataset");
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5D__close_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5D_close
  *
+ * Purpose:  Insures that all data has been saved to the file, closes the
+ *           dataset object header, and frees all resources used by the
+ *           descriptor.
+ *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1800,7 +1665,7 @@ H5D_close(H5D_t *dataset)
     if(dataset->shared->fo_count == 0) {
 
         /* Flush the dataset's information.  Continue to close even if it fails. */
-        if(H5D__flush_real(dataset, H5AC_ind_read_dxpl_id) < 0)
+        if(H5D__flush_real(dataset) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to flush cached dataset info")
 
         /* Set a flag to indicate the dataset is closing, before we start freeing things */
@@ -1880,12 +1745,15 @@ H5D_close(H5D_t *dataset)
         } /* end switch */ /*lint !e788 All appropriate cases are covered */
 
         /* Destroy any cached layout information for the dataset */
-        if(dataset->shared->layout.ops->dest && (dataset->shared->layout.ops->dest)(dataset, H5AC_ind_read_dxpl_id) < 0)
+        if(dataset->shared->layout.ops->dest && (dataset->shared->layout.ops->dest)(dataset) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to destroy layout info")
 
         /* Free the external file prefix */
         dataset->shared->extfile_prefix = (char *)H5MM_xfree(dataset->shared->extfile_prefix);
 
+        /* Free the vds file prefix */
+        dataset->shared->vds_prefix = (char *)H5MM_xfree(dataset->shared->vds_prefix);
+
         /* Release layout, fill-value, efl & pipeline messages */
         if(dataset->shared->dcpl_id != H5P_DATASET_CREATE_DEFAULT)
             free_failed |= (H5O_msg_reset(H5O_PLINE_ID, &dataset->shared->dcpl_cache.pline) < 0) ||
@@ -1897,7 +1765,7 @@ H5D_close(H5D_t *dataset)
         if(H5AC_cork(dataset->oloc.file, dataset->oloc.addr, H5AC__GET_CORKED, &corked) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to retrieve an object's cork status")
         if(corked)
-	        if(H5AC_cork(dataset->oloc.file, dataset->oloc.addr, H5AC__UNCORK, NULL) < 0)
+            if(H5AC_cork(dataset->oloc.file, dataset->oloc.addr, H5AC__UNCORK, NULL) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTUNCORK, FAIL, "unable to uncork an object")
 
         /*
@@ -1910,21 +1778,21 @@ H5D_close(H5D_t *dataset)
 
         /* Remove the dataset from the list of opened objects in the file */
         if(H5FO_top_decr(dataset->oloc.file, dataset->oloc.addr) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "can't decrement count for object")
-        if(H5FO_delete(dataset->oloc.file, H5AC_ind_read_dxpl_id, dataset->oloc.addr) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "can't remove dataset from list of open objects")
+            HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "can't decrement count for object")
+        if(H5FO_delete(dataset->oloc.file, dataset->oloc.addr) < 0)
+            HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "can't remove dataset from list of open objects")
 
         /* Close the dataset object */
         /* (This closes the file, if this is the last object open) */
         if(H5O_close(&(dataset->oloc), &file_closed) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release object header")
+            HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release object header")
 
         /* Evict dataset metadata if evicting on close */
         if(!file_closed && H5F_SHARED(dataset->oloc.file) && H5F_EVICT_ON_CLOSE(dataset->oloc.file)) {
-            if(H5AC_flush_tagged_metadata(dataset->oloc.file, dataset->oloc.addr, H5AC_ind_read_dxpl_id) < 0) 
-                HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush tagged metadata")
-            if(H5AC_evict_tagged_metadata(dataset->oloc.file, dataset->oloc.addr, FALSE, H5AC_ind_read_dxpl_id) < 0) 
-                HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to evict tagged metadata")
+            if(H5AC_flush_tagged_metadata(dataset->oloc.file, dataset->oloc.addr) < 0)
+                HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush tagged metadata")
+            if(H5AC_evict_tagged_metadata(dataset->oloc.file, dataset->oloc.addr, FALSE) < 0)
+                HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to evict tagged metadata")
         } /* end if */
 
         /*
@@ -1935,7 +1803,6 @@ H5D_close(H5D_t *dataset)
          */
         dataset->oloc.file = NULL;
         dataset->shared = H5FL_FREE(H5D_shared_t, dataset->shared);
-
     } /* end if */
     else {
         /* Decrement the ref. count for this object in the top file */
@@ -1970,23 +1837,19 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_mult_refresh_close
+ * Function: H5D_mult_refresh_close
  *
- * Purpose:	Closing down the needed information when the dataset has
- *		multiple opens.  (From H5O_refresh_metadata_close())
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Vailin Choi
- *		12/24/15
+ * Purpose:  Closing down the needed information when the dataset has
+ *           multiple opens.  (From H5O_refresh_metadata_close())
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D_mult_refresh_close(hid_t dset_id, hid_t dxpl_id)
+H5D_mult_refresh_close(hid_t dset_id)
 {
-    H5D_t       *dataset;             	/* Dataset to refresh */
-    herr_t      ret_value = SUCCEED;    /* return value */
+    H5D_t       *dataset;                 /* Dataset to refresh */
+    herr_t      ret_value = SUCCEED;      /* return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -2042,7 +1905,7 @@ H5D_mult_refresh_close(hid_t dset_id, hid_t dxpl_id)
         } /* end switch */ /*lint !e788 All appropriate cases are covered */
 
         /* Destroy any cached layout information for the dataset */
-        if(dataset->shared->layout.ops->dest && (dataset->shared->layout.ops->dest)(dataset, dxpl_id) < 0)
+        if(dataset->shared->layout.ops->dest && (dataset->shared->layout.ops->dest)(dataset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to destroy layout info")
     } /* end if */
 
@@ -2052,20 +1915,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_mult_refresh_reopen
- *
- * Purpose:	Re-initialize the needed info when the dataset has multiple
- *		opens. (From H5O_refresh_metadata_reopen())
+ * Function: H5D_mult_refresh_reopen
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Vailin Choi
- *		12/24/15
+ * Purpose:  Re-initialize the needed info when the dataset has multiple
+ *           opens.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D_mult_refresh_reopen(H5D_t *dataset, hid_t dxpl_id)
+H5D_mult_refresh_reopen(H5D_t *dataset)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -2076,25 +1935,25 @@ H5D_mult_refresh_reopen(H5D_t *dataset, hid_t dxpl_id)
     HDassert(dataset->shared->fo_count > 0);
 
     if(dataset->shared->fo_count > 1) {
-	/* Release dataspace info */
-	if(H5S_close(dataset->shared->space) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to release dataspace")
-
-	/* Re-load dataspace info */
-	if(NULL == (dataset->shared->space = H5S_read(&(dataset->oloc), dxpl_id)))
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to load dataspace info from dataset header")
-
-	/* Cache the dataset's dataspace info */
-	if(H5D__cache_dataspace_info(dataset) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't cache dataspace info")
-    
-	/* Release layout info */
-	if(H5O_msg_reset(H5O_LAYOUT_ID, &dataset->shared->layout) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTRESET, FAIL, "unable to reset layout info")
-
-	/* Re-load layout message info */
-	if(NULL == H5O_msg_read(&(dataset->oloc), H5O_LAYOUT_ID, &(dataset->shared->layout), dxpl_id))
-	    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to read data layout message")	
+        /* Release dataspace info */
+        if(H5S_close(dataset->shared->space) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to release dataspace")
+
+        /* Re-load dataspace info */
+        if(NULL == (dataset->shared->space = H5S_read(&(dataset->oloc))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to load dataspace info from dataset header")
+
+        /* Cache the dataset's dataspace info */
+        if(H5D__cache_dataspace_info(dataset) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't cache dataspace info")
+
+        /* Release layout info */
+        if(H5O_msg_reset(H5O_LAYOUT_ID, &dataset->shared->layout) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTRESET, FAIL, "unable to reset layout info")
+
+        /* Re-load layout message info */
+        if(NULL == H5O_msg_read(&(dataset->oloc), H5O_LAYOUT_ID, &(dataset->shared->layout)))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to read data layout message")
     } /* end if */
 
 done:
@@ -2103,16 +1962,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_oloc
- *
- * Purpose:	Returns a pointer to the object location for a dataset.
- *
- * Return:	Success:	Ptr to location
- *		Failure:	NULL
+ * Function: H5D_oloc
  *
- * Programmer:	Robb Matzke
- *              Friday, April 24, 1998
+ * Purpose:  Returns a pointer to the object location for a dataset.
  *
+ * Return:   Success:    Ptr to location
+ *           Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5O_loc_t *
@@ -2126,16 +1981,12 @@ H5D_oloc(H5D_t *dataset)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_nameof
+ * Function: H5D_nameof
  *
- * Purpose:	Returns a pointer to the group hier. path for a dataset.
- *
- * Return:	Success:	Ptr to entry
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Monday, September 12, 2005
+ * Purpose:  Returns a pointer to the group hier. path for a dataset.
  *
+ * Return:   Success:    Ptr to entry
+ *           Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5G_name_t *
@@ -2149,17 +2000,13 @@ H5D_nameof(H5D_t *dataset)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_typeof
- *
- * Purpose:	Returns a pointer to the dataset's datatype.  The datatype
- *		is not copied.
- *
- * Return:	Success:	Ptr to the dataset's datatype, uncopied.
- *		Failure:	NULL
+ * Function: H5D_typeof
  *
- * Programmer:	Robb Matzke
- *              Thursday, June  4, 1998
+ * Purpose:  Returns a pointer to the dataset's datatype.  The datatype
+ *           is not copied.
  *
+ * Return:   Success:    Ptr to the dataset's datatype, uncopied.
+ *           Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5T_t *
@@ -2177,15 +2024,11 @@ H5D_typeof(const H5D_t *dset)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__alloc_storage
+ * Function: H5D__alloc_storage
  *
- * Purpose:	Allocate storage for the raw data of a dataset.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Friday, January 16, 1998
+ * Purpose:  Allocate storage for the raw data of a dataset.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2193,11 +2036,11 @@ H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
     hbool_t full_overwrite, hsize_t old_dim[])
 {
     const H5D_t *dset = io_info->dset;   /* The dataset object */
-    H5F_t *f = dset->oloc.file;         /* The dataset's file pointer */
-    H5O_layout_t *layout;               /* The dataset's layout information */
-    hbool_t must_init_space = FALSE;    /* Flag to indicate that space should be initialized */
-    hbool_t addr_set = FALSE;           /* Flag to indicate that the dataset's storage address was set */
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    H5F_t *f = dset->oloc.file;          /* The dataset's file pointer */
+    H5O_layout_t *layout;                /* The dataset's layout information */
+    hbool_t must_init_space = FALSE;     /* Flag to indicate that space should be initialized */
+    hbool_t addr_set = FALSE;            /* Flag to indicate that the dataset's storage address was set */
+    herr_t  ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
@@ -2219,7 +2062,7 @@ H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
                     /* Check if we have a zero-sized dataset */
                     if(layout->storage.u.contig.size > 0) {
                         /* Reserve space in the file for the entire array */
-                        if(H5D__contig_alloc(f, io_info->md_dxpl_id, &layout->storage.u.contig/*out*/) < 0)
+                        if(H5D__contig_alloc(f, &layout->storage.u.contig/*out*/) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to initialize contiguous storage")
 
                         /* Indicate that we should initialize storage space */
@@ -2236,7 +2079,7 @@ H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
             case H5D_CHUNKED:
                 if(!(*dset->shared->layout.ops->is_space_alloc)(&dset->shared->layout.storage)) {
                     /* Create the root of the index that manages chunked storage */
-                    if(H5D__chunk_create(dset /*in,out*/, io_info->md_dxpl_id) < 0)
+                    if(H5D__chunk_create(dset /*in,out*/) < 0)
                         HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to initialize chunked storage")
 
                     /* Indicate that we set the storage addr */
@@ -2247,19 +2090,18 @@ H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
                 } /* end if */
 
                 /* If space allocation is set to 'early' and we are extending
-		 * the dataset, indicate that space should be allocated, so the
+                 * the dataset, indicate that space should be allocated, so the
                  * index gets expanded. -QAK
                  */
-		if(dset->shared->dcpl_cache.fill.alloc_time == H5D_ALLOC_TIME_EARLY
-                        && time_alloc == H5D_ALLOC_EXTEND)
-		    must_init_space = TRUE;
+                if(dset->shared->dcpl_cache.fill.alloc_time == H5D_ALLOC_TIME_EARLY && time_alloc == H5D_ALLOC_EXTEND)
+                    must_init_space = TRUE;
                 break;
 
             case H5D_COMPACT:
                 /* Check if space is already allocated */
                 if(NULL == layout->storage.u.compact.buf) {
-                    /* Reserve space in layout header message for the entire array. 
-                     * Starting from the 1.8.7 release, we allow dataspace to have 
+                    /* Reserve space in layout header message for the entire array.
+                     * Starting from the 1.8.7 release, we allow dataspace to have
                      * zero dimension size.  So the storage size can be zero.
                      * SLU 2011/4/4 */
                     if(layout->storage.u.compact.size > 0) {
@@ -2271,7 +2113,8 @@ H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
 
                         /* Indicate that we should initialize storage space */
                         must_init_space = TRUE;
-                    } else {
+                    }
+                    else {
                         layout->storage.u.compact.dirty = FALSE;
                         must_init_space = FALSE;
                     }
@@ -2313,7 +2156,7 @@ H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
                         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize dataset with fill value")
             } /* end if */
             else {
-                H5D_fill_value_t	fill_status;    /* The fill value status */
+                H5D_fill_value_t    fill_status;    /* The fill value status */
 
                 /* Check the dataset's fill-value status */
                 if(H5P_is_fill_value_defined(&dset->shared->dcpl_cache.fill, &fill_status) < 0)
@@ -2337,7 +2180,7 @@ H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
          */
         if(time_alloc != H5D_ALLOC_CREATE && addr_set)
             /* Mark the layout as dirty, for later writing to the file */
-            if(H5D__mark(dset, io_info->md_dxpl_id, H5D_MARK_LAYOUT) < 0)
+            if(H5D__mark(dset, H5D_MARK_LAYOUT) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to mark dataspace as dirty")
     } /* end if */
 
@@ -2347,24 +2190,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__init_storage
- *
- * Purpose:	Initialize the data for a new dataset.  If a selection is
- *		defined for SPACE then initialize only that part of the
- *		dataset.
+ * Function: H5D__init_storage
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Monday, October  5, 1998
+ * Purpose:  Initialize the data for a new dataset.  If a selection is
+ *           defined for SPACE then initialize only that part of the
+ *           dataset.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5D__init_storage(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_t old_dim[])
 {
     const H5D_t *dset = io_info->dset;     /* dataset pointer */
-    herr_t ret_value = SUCCEED;           /* Return value */
+    herr_t ret_value = SUCCEED;            /* Return value */
 
     FUNC_ENTER_STATIC
 
@@ -2375,7 +2214,7 @@ H5D__init_storage(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_t
             /* If we will be immediately overwriting the values, don't bother to clear them */
             if(!full_overwrite) {
                 /* Fill the compact dataset storage */
-                if(H5D__compact_fill(dset, io_info->md_dxpl_id) < 0)
+                if(H5D__compact_fill(dset) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize compact dataset storage")
             } /* end if */
             break;
@@ -2423,29 +2262,25 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__get_storage_size
- *
- * Purpose:	Determines how much space has been reserved to store the raw
- *		data of a dataset.
- *
- * Return:	Non-negative on success, negative on failure
+ * Function: H5D__get_storage_size_real
  *
- * Programmer:	Robb Matzke
- *              Wednesday, April 21, 1999
+ * Purpose:  Determines how much space has been reserved to store the raw
+ *           data of a dataset.
  *
+ * Return:   Non-negative on success, negative on failure
  *-------------------------------------------------------------------------
  */
-herr_t
-H5D__get_storage_size(H5D_t *dset, hid_t dxpl_id, hsize_t *storage_size)
+static herr_t
+H5D__get_storage_size_real(const H5D_t *dset, hsize_t *storage_size)
 {
-    herr_t	ret_value = SUCCEED;    /* Return value */
+    herr_t    ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, dset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(dset->oloc.addr)
 
     switch(dset->shared->layout.type) {
         case H5D_CHUNKED:
             if((*dset->shared->layout.ops->is_space_alloc)(&dset->shared->layout.storage)) {
-                if(H5D__chunk_allocated(dset, dxpl_id, storage_size) < 0)
+                if(H5D__chunk_allocated(dset, storage_size) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve chunked dataset allocated size")
             } /* end if */
             else
@@ -2477,29 +2312,53 @@ H5D__get_storage_size(H5D_t *dset, hid_t dxpl_id, hsize_t *storage_size)
     } /*lint !e788 All appropriate cases are covered */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, 0)
-} /* end H5D__get_storage_size() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5D__get_storage_size_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__get_offset
+ * Function: H5D__get_storage_size
  *
- * Purpose:	Private function for H5D__get_offset.  Returns the address
- *              of dataset in file.
+ * Purpose:  Determines how much space has been reserved to store the raw
+ *           data of a dataset.
  *
- * Return:	Success:        the address of dataset
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              creating attributes that can set up VOL / SWMR info
+ *              (which need a DXPL).
  *
- *		Failure:	HADDR_UNDEF
+ * Return:   Non-negative on success, negative on failure
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5D__get_storage_size(const H5D_t *dset, hsize_t *storage_size)
+{
+    herr_t    ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Difficult to error check, since the error value is 0 and 0 is a valid value... :-/ */
+    if(H5D__get_storage_size_real(dset, storage_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get size of dataset's storage")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5D__get_storage_size() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5D__get_offset
  *
- * Programmer:  Raymond Lu
- *              November 6, 2002
+ * Purpose:  Private function for H5D__get_offset.  Returns the address
+ *           of dataset in file.
  *
+ * Return:   Success:        the address of dataset
+ *           Failure:    HADDR_UNDEF
  *-------------------------------------------------------------------------
  */
 haddr_t
 H5D__get_offset(const H5D_t *dset)
 {
-    haddr_t	ret_value = HADDR_UNDEF;
+    haddr_t    ret_value = HADDR_UNDEF;
 
     FUNC_ENTER_PACKAGE
 
@@ -2531,42 +2390,35 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_vlen_reclaim
- *
- * Purpose:	Frees the buffers allocated for storing variable-length data
- *      in memory.  Only frees the VL data in the selection defined in the
- *      dataspace.  The dataset transfer property list is required to find the
- *      correct allocation/free methods for the VL data in the buffer.
+ * Function: H5D_vlen_reclaim
  *
- * Return:	Non-negative on success, negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, November 22, 2005
+ * Purpose:  Frees the buffers allocated for storing variable-length data
+ *           in memory.  Only frees the VL data in the selection defined in the
+ *           dataspace.
  *
+ * Return:   Non-negative on success, negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D_vlen_reclaim(hid_t type_id, H5S_t *space, hid_t plist_id, void *buf)
+H5D_vlen_reclaim(hid_t type_id, H5S_t *space, void *buf)
 {
     H5T_t *type;                /* Datatype */
     H5S_sel_iter_op_t dset_op;  /* Operator for iteration */
-    H5T_vlen_alloc_info_t _vl_alloc_info;       /* VL allocation info buffer */
-    H5T_vlen_alloc_info_t *vl_alloc_info = &_vl_alloc_info;   /* VL allocation info */
-    herr_t ret_value = FAIL;            /* Return value */
+    H5T_vlen_alloc_info_t vl_alloc_info;   /* VL allocation info */
+    herr_t ret_value = FAIL;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Check args */
     HDassert(H5I_DATATYPE == H5I_get_type(type_id));
     HDassert(space);
-    HDassert(H5P_isa_class(plist_id, H5P_DATASET_XFER));
     HDassert(buf);
 
     if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an valid base datatype")
 
     /* Get the allocation info */
-    if(H5T_vlen_get_alloc_info(plist_id,&vl_alloc_info) < 0)
+    if(H5CX_get_vlen_alloc_info(&vl_alloc_info) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to retrieve VL allocation info")
 
     /* Call H5S_select_iterate with args, etc. */
@@ -2574,7 +2426,7 @@ H5D_vlen_reclaim(hid_t type_id, H5S_t *space, hid_t plist_id, void *buf)
     dset_op.u.app_op.op = H5T_vlen_reclaim;
     dset_op.u.app_op.type_id = type_id;
 
-    ret_value = H5S_select_iterate(buf, type, space, &dset_op, vl_alloc_info);
+    ret_value = H5S_select_iterate(buf, type, space, &dset_op, &vl_alloc_info);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2582,18 +2434,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__vlen_get_buf_size_alloc
- *
- * Purpose:	This routine makes certain there is enough space in the temporary
- *      buffer for the new data to read in.  All the VL data read in is actually
- *      placed in this buffer, overwriting the previous data.  Needless to say,
- *      this data is not actually usable.
+ * Function: H5D__vlen_get_buf_size_alloc
  *
- * Return:	Non-negative on success, negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, August 17, 1999
+ * Purpose:  This routine makes certain there is enough space in the temporary
+ *           buffer for the new data to read in.  All the VL data read in is actually
+ *           placed in this buffer, overwriting the previous data.  Needless to say,
+ *           this data is not actually usable.
  *
+ * Return:   Non-negative on success, negative on failure
  *-------------------------------------------------------------------------
  */
 void *
@@ -2616,14 +2464,14 @@ H5D__vlen_get_buf_size_alloc(size_t size, void *info)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__vlen_get_buf_size
+ * Function: H5D__vlen_get_buf_size
  *
- * Purpose:	This routine checks the number of bytes required to store a single
- *      element from a dataset in memory, creating a selection with just the
- *      single element selected to read in the element and using a custom memory
- *      allocator for any VL data encountered.
- *          The *size value is modified according to how many bytes are
- *      required to store the element in memory.
+ * Purpose:  This routine checks the number of bytes required to store a single
+ *           element from a dataset in memory, creating a selection with just the
+ *           single element selected to read in the element and using a custom memory
+ *           allocator for any VL data encountered.
+ *           The *size value is modified according to how many bytes are
+ *           required to store the element in memory.
  *
  * Implementation: This routine actually performs the read with a custom
  *      memory manager which basically just counts the bytes requested and
@@ -2633,15 +2481,12 @@ H5D__vlen_get_buf_size_alloc(size_t size, void *info)
  *      Kinda kludgy, but easier than the other method of trying to figure out
  *      the sizes without actually reading the data in... - QAK
  *
- * Return:	Non-negative on success, negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, August 17, 1999
- *
+ * Return:   Non-negative on success, negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__vlen_get_buf_size(void H5_ATTR_UNUSED *elem, hid_t type_id, unsigned H5_ATTR_UNUSED ndim, const hsize_t *point, void *op_data)
+H5D__vlen_get_buf_size(void H5_ATTR_UNUSED *elem, hid_t type_id,
+    unsigned H5_ATTR_UNUSED ndim, const hsize_t *point, void *op_data)
 {
     H5D_vlen_bufsize_t *vlen_bufsize = (H5D_vlen_bufsize_t *)op_data;
     H5T_t *dt;                          /* Datatype for operation */
@@ -2665,7 +2510,7 @@ H5D__vlen_get_buf_size(void H5_ATTR_UNUSED *elem, hid_t type_id, unsigned H5_ATT
         HGOTO_ERROR(H5E_DATASET, H5E_CANTCREATE, FAIL, "can't select point")
 
     /* Read in the point (with the custom VL memory allocator) */
-    if(H5D__read(vlen_bufsize->dset, type_id, vlen_bufsize->mspace, vlen_bufsize->fspace, vlen_bufsize->xfer_pid, vlen_bufsize->fl_tbuf) < 0)
+    if(H5D__read(vlen_bufsize->dset, type_id, vlen_bufsize->mspace, vlen_bufsize->fspace, vlen_bufsize->fl_tbuf) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "can't read point")
 
 done:
@@ -2674,15 +2519,11 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__check_filters
+ * Function: H5D__check_filters
  *
- * Purpose:	Check if the filters have be initialized for the dataset
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		Thursday, October 11, 2007
+ * Purpose:  Check if the filters have be initialized for the dataset
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2728,27 +2569,23 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__set_extent
- *
- * Purpose:	Based on H5D_extend, allows change to a lower dimension,
- *		calls H5S_set_extent and H5D__chunk_prune_by_extent instead
+ * Function: H5D__set_extent
  *
- * Return:	Non-negative on success, negative on failure
- *
- * Programmer:  Pedro Vicente, pvn@ncsa.uiuc.edu
- *              April 9, 2002
+ * Purpose:  Based on H5D_extend, allows change to a lower dimension,
+ *           calls H5S_set_extent and H5D__chunk_prune_by_extent instead
  *
+ * Return:   Non-negative on success, negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__set_extent(H5D_t *dset, const hsize_t *size, hid_t dxpl_id)
+H5D__set_extent(H5D_t *dset, const hsize_t *size)
 {
     hsize_t curr_dims[H5S_MAX_RANK];    /* Current dimension sizes */
     htri_t  changed;                    /* Whether the dataspace changed size */
     size_t  u, v;                       /* Local index variable */
     herr_t  ret_value = SUCCEED;        /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, dset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_VOL_TAG(dset->oloc.addr)
 
     /* Check args */
     HDassert(dset);
@@ -2811,8 +2648,11 @@ H5D__set_extent(H5D_t *dset, const hsize_t *size, hid_t dxpl_id)
                                 dset->shared->cache.chunk.scaled_dims[u] > dset->shared->cache.chunk.nslots))
                         update_chunks = TRUE;
 
+                    if(!(scaled_power2up = H5VM_power2up(scaled)))
+                        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get the next power of 2")
+
                     /* Check if the number of bits required to encode the scaled size value changed */
-                    if(dset->shared->cache.chunk.scaled_power2up[u] != (scaled_power2up = H5VM_power2up(scaled))) {
+                    if(dset->shared->cache.chunk.scaled_power2up[u] != scaled_power2up) {
                         /* Update the 'power2up' & 'encode_bits' values for the current dimension */
                         dset->shared->cache.chunk.scaled_power2up[u] = scaled_power2up;
                         dset->shared->cache.chunk.scaled_encode_bits[u] = H5VM_log2_gen(scaled_power2up);
@@ -2840,7 +2680,7 @@ H5D__set_extent(H5D_t *dset, const hsize_t *size, hid_t dxpl_id)
             /* Check if updating the chunk cache indices is necessary */
             if(update_chunks)
                 /* Update the chunk cache indices */
-                if(H5D__chunk_update_cache(dset, dxpl_id) < 0)
+                if(H5D__chunk_update_cache(dset) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update cached chunk indices")
         } /* end if */
 
@@ -2873,12 +2713,10 @@ H5D__set_extent(H5D_t *dset, const hsize_t *size, hid_t dxpl_id)
             H5D_io_info_t io_info;
 
             io_info.dset = dset;
-            io_info.raw_dxpl_id = H5AC_rawdata_dxpl_id;
-            io_info.md_dxpl_id = dxpl_id;
 
             if(H5D__alloc_storage(&io_info, H5D_ALLOC_EXTEND, FALSE, curr_dims) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to extend dataset storage")
-        }
+        } /* end if */
         /*-------------------------------------------------------------------------
          * Remove chunk information in the case of chunked datasets
          * This removal takes place only in case we are shrinking the dateset
@@ -2888,42 +2726,38 @@ H5D__set_extent(H5D_t *dset, const hsize_t *size, hid_t dxpl_id)
         if(H5D_CHUNKED == dset->shared->layout.type) {
             if(shrink && (*dset->shared->layout.ops->is_space_alloc)(&dset->shared->layout.storage))
                 /* Remove excess chunks */
-                if(H5D__chunk_prune_by_extent(dset, dxpl_id, curr_dims) < 0)
+                if(H5D__chunk_prune_by_extent(dset, curr_dims) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to remove chunks")
 
             /* Update chunks that are no longer edge chunks as a result of
              * expansion */
             if(expand && (dset->shared->layout.u.chunk.flags & H5O_LAYOUT_CHUNK_DONT_FILTER_PARTIAL_BOUND_CHUNKS)
                     && (dset->shared->dcpl_cache.pline.nused > 0))
-                if(H5D__chunk_update_old_edge_chunks(dset, dxpl_id, curr_dims) < 0)
+                if(H5D__chunk_update_old_edge_chunks(dset, curr_dims) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to do update old edge chunks")
-	} /* end if */
+        } /* end if */
 
         /* Mark the dataspace as dirty, for later writing to the file */
-        if(H5D__mark(dset, dxpl_id, H5D_MARK_SPACE) < 0)
+        if(H5D__mark(dset, H5D_MARK_SPACE) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to mark dataspace as dirty")
     } /* end if */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
 } /* end H5D__set_extent() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D__flush_sieve_buf
- *
- * Purpose:     Flush any dataset sieve buffer info cached in memory
+ * Function: H5D__flush_sieve_buf
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:  Quincey Koziol
- *              July 27, 2009
+ * Purpose:  Flush any dataset sieve buffer info cached in memory
  *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__flush_sieve_buf(H5D_t *dataset, hid_t dxpl_id)
+H5D__flush_sieve_buf(H5D_t *dataset)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -2938,7 +2772,7 @@ H5D__flush_sieve_buf(H5D_t *dataset, hid_t dxpl_id)
 
         /* Write dirty data sieve buffer to file */
         if(H5F_block_write(dataset->oloc.file, H5FD_MEM_DRAW, dataset->shared->cache.contig.sieve_loc,
-                dataset->shared->cache.contig.sieve_size, dxpl_id, dataset->shared->cache.contig.sieve_buf) < 0)
+                dataset->shared->cache.contig.sieve_size, dataset->shared->cache.contig.sieve_buf) < 0)
             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "block write failed")
 
         /* Reset sieve buffer dirty flag */
@@ -2951,208 +2785,231 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D__flush_real
- *
- * Purpose:     Flush any dataset information cached in memory
+ * Function: H5D__flush_real
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:  Quincey Koziol
- *              December 6, 2007
+ * Purpose:  Flush any dataset information cached in memory
  *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__flush_real(H5D_t *dataset, hid_t dxpl_id)
+H5D__flush_real(H5D_t *dataset)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, dataset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(dataset->oloc.addr)
 
     /* Check args */
     HDassert(dataset);
     HDassert(dataset->shared);
 
     /* Avoid flushing the dataset (again) if it's closing */
-    if(!dataset->shared->closing) {
+    if(!dataset->shared->closing)
         /* Flush cached raw data for each kind of dataset layout */
-        if(dataset->shared->layout.ops->flush &&
-                (dataset->shared->layout.ops->flush)(dataset, dxpl_id) < 0)
+        if(dataset->shared->layout.ops->flush && (dataset->shared->layout.ops->flush)(dataset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to flush raw data")
-    } /* end if */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__flush_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D__format_convert
- *
- * Purpose:     For chunked: downgrade the chunk indexing type to version 1 B-tree
- *              For compact/contiguous: downgrade layout version to 3
+ * Function: H5D__flush
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:  Vailin Choi
- *              Feb 2015
+ * Purpose:  Flush dataset information cached in memory
  *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__format_convert(H5D_t *dataset, hid_t dxpl_id)
+H5D__flush(H5D_t *dset, hid_t dset_id)
 {
-    H5D_chk_idx_info_t new_idx_info;    	/* Index info for the new layout */
-    H5D_chk_idx_info_t idx_info;        	/* Index info for the current layout */
-    H5O_layout_t newlayout;			/* The new layout */
-    hbool_t init_new_index = FALSE;		/* Indicate that the new chunk index is initialized */
-    hbool_t delete_old_layout = FALSE;		/* Indicate that the old layout message is deleted */
-    hbool_t add_new_layout = FALSE;		/* Indicate that the new layout message is added */
-    herr_t ret_value = SUCCEED;         	/* Return value */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, dataset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Check args */
-    HDassert(dataset);
+    HDassert(dset);
+    HDassert(dset->shared);
 
-    switch(dataset->shared->layout.type) {
-        case H5D_CHUNKED:
-	    HDassert(dataset->shared->layout.u.chunk.idx_type != H5D_CHUNK_IDX_BTREE);
+    /* Flush any dataset information still cached in memory */
+    if(H5D__flush_real(dset) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to flush cached dataset info")
 
-	    /* Set up the current index info */
-	    idx_info.f = dataset->oloc.file;
-	    idx_info.dxpl_id = dxpl_id;
-	    idx_info.pline = &dataset->shared->dcpl_cache.pline;
-	    idx_info.layout = &dataset->shared->layout.u.chunk;
-	    idx_info.storage = &dataset->shared->layout.storage.u.chunk;
+    /* Flush object's metadata to file */
+    if(H5O_flush_common(&dset->oloc, dset_id) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to flush dataset and object flush callback")
 
-	    /* Copy the current layout info to the new layout */
-	    HDmemcpy(&newlayout, &dataset->shared->layout, sizeof(H5O_layout_t));
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5D__flush() */
 
-	    /* Set up info for version 1 B-tree in the new layout */
-	    newlayout.version = H5O_LAYOUT_VERSION_3;
-	    newlayout.storage.u.chunk.idx_type = H5D_CHUNK_IDX_BTREE;
-	    newlayout.storage.u.chunk.idx_addr = HADDR_UNDEF;
-	    newlayout.storage.u.chunk.ops = H5D_COPS_BTREE;
-	    newlayout.storage.u.chunk.u.btree.shared = NULL;
+
+/*-------------------------------------------------------------------------
+ * Function: H5D__format_convert
+ *
+ * Purpose:  For chunked: downgrade the chunk indexing type to version 1 B-tree
+ *           For compact/contiguous: downgrade layout version to 3
+ *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5D__format_convert(H5D_t *dataset)
+{
+    H5D_chk_idx_info_t new_idx_info;        /* Index info for the new layout */
+    H5D_chk_idx_info_t idx_info;            /* Index info for the current layout */
+    H5O_layout_t *newlayout = NULL;         /* The new layout */
+    hbool_t init_new_index = FALSE;         /* Indicate that the new chunk index is initialized */
+    hbool_t delete_old_layout = FALSE;      /* Indicate that the old layout message is deleted */
+    hbool_t add_new_layout = FALSE;         /* Indicate that the new layout message is added */
+    herr_t ret_value = SUCCEED;             /* Return value */
 
-	    /* Set up the index info to version 1 B-tree */
-	    new_idx_info.f = dataset->oloc.file;
-	    new_idx_info.dxpl_id = dxpl_id;
-	    new_idx_info.pline = &dataset->shared->dcpl_cache.pline;
-	    new_idx_info.layout = &newlayout.u.chunk;
-	    new_idx_info.storage = &newlayout.storage.u.chunk;
+    FUNC_ENTER_PACKAGE_VOL_TAG(dataset->oloc.addr)
 
-	    /* Initialize version 1 B-tree */
-	    if(new_idx_info.storage->ops->init && 
-              (new_idx_info.storage->ops->init)(&new_idx_info, dataset->shared->space, dataset->oloc.addr) < 0)
-		HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize indexing information")
-	    init_new_index = TRUE;
+    /* Check args */
+    HDassert(dataset);
 
-	    /* If the current chunk index exists */
-	    if(H5F_addr_defined(idx_info.storage->idx_addr)) {
+    switch(dataset->shared->layout.type) {
+        case H5D_CHUNKED:
+            HDassert(dataset->shared->layout.u.chunk.idx_type != H5D_CHUNK_IDX_BTREE);
 
-		/* Create v1 B-tree chunk index */
-		if((new_idx_info.storage->ops->create)(&new_idx_info) < 0)
-		    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't create chunk index")
+            if(NULL == (newlayout = (H5O_layout_t *)H5MM_calloc(sizeof(H5O_layout_t))))
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate buffer")
 
-		/* Iterate over the chunks in the current index and insert the chunk addresses 
-		 * into the version 1 B-tree chunk index */
-		if(H5D__chunk_format_convert(dataset, &idx_info, &new_idx_info) < 0)
-		    HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to iterate/convert chunk index")
-	    } /* end if */
+            /* Set up the current index info */
+            idx_info.f = dataset->oloc.file;
+            idx_info.pline = &dataset->shared->dcpl_cache.pline;
+            idx_info.layout = &dataset->shared->layout.u.chunk;
+            idx_info.storage = &dataset->shared->layout.storage.u.chunk;
+
+            /* Copy the current layout info to the new layout */
+            HDmemcpy(newlayout, &dataset->shared->layout, sizeof(H5O_layout_t));
+
+            /* Set up info for version 1 B-tree in the new layout */
+            newlayout->version = H5O_LAYOUT_VERSION_3;
+            newlayout->storage.u.chunk.idx_type = H5D_CHUNK_IDX_BTREE;
+            newlayout->storage.u.chunk.idx_addr = HADDR_UNDEF;
+            newlayout->storage.u.chunk.ops = H5D_COPS_BTREE;
+            newlayout->storage.u.chunk.u.btree.shared = NULL;
+
+            /* Set up the index info to version 1 B-tree */
+            new_idx_info.f = dataset->oloc.file;
+            new_idx_info.pline = &dataset->shared->dcpl_cache.pline;
+            new_idx_info.layout = &(newlayout->u).chunk;
+            new_idx_info.storage = &(newlayout->storage).u.chunk;
+
+            /* Initialize version 1 B-tree */
+            if(new_idx_info.storage->ops->init && (new_idx_info.storage->ops->init)(&new_idx_info, dataset->shared->space, dataset->oloc.addr) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize indexing information")
+            init_new_index = TRUE;
+
+            /* If the current chunk index exists */
+            if(H5F_addr_defined(idx_info.storage->idx_addr)) {
+
+                /* Create v1 B-tree chunk index */
+                if((new_idx_info.storage->ops->create)(&new_idx_info) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't create chunk index")
+
+                /* Iterate over the chunks in the current index and insert the chunk addresses
+                 * into the version 1 B-tree chunk index
+                 */
+                if(H5D__chunk_format_convert(dataset, &idx_info, &new_idx_info) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to iterate/convert chunk index")
+            } /* end if */
 
-	    /* Delete the old "current" layout message */
-	    if(H5O_msg_remove(&dataset->oloc, H5O_LAYOUT_ID, H5O_ALL, FALSE, dxpl_id) < 0)
-		HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete layout message")
+            /* Delete the old "current" layout message */
+            if(H5O_msg_remove(&dataset->oloc, H5O_LAYOUT_ID, H5O_ALL, FALSE) < 0)
+                HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete layout message")
 
-	    delete_old_layout = TRUE;
+            delete_old_layout = TRUE;
 
-	    /* Append the new layout message to the object header */
-	    if(H5O_msg_create(&dataset->oloc, H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, &newlayout, dxpl_id) < 0)
-		HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update layout header message")
+            /* Append the new layout message to the object header */
+            if(H5O_msg_create(&dataset->oloc, H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, newlayout) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update layout header message")
 
-	    add_new_layout = TRUE;
+            add_new_layout = TRUE;
 
-	    /* Release the old (current) chunk index */
-	    if(idx_info.storage->ops->dest && (idx_info.storage->ops->dest)(&idx_info) < 0)
-		HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to release chunk index info")
+            /* Release the old (current) chunk index */
+            if(idx_info.storage->ops->dest && (idx_info.storage->ops->dest)(&idx_info) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to release chunk index info")
 
-	    /* Copy the new layout to the dataset's layout */
-	    HDmemcpy(&dataset->shared->layout, &newlayout, sizeof(H5O_layout_t));
+            /* Copy the new layout to the dataset's layout */
+            HDmemcpy(&dataset->shared->layout, newlayout, sizeof(H5O_layout_t));
 
-	    break;
+            break;
 
-	case H5D_CONTIGUOUS:
+        case H5D_CONTIGUOUS:
         case H5D_COMPACT:
-	    HDassert(dataset->shared->layout.version > H5O_LAYOUT_VERSION_DEFAULT);
-	    dataset->shared->layout.version = H5O_LAYOUT_VERSION_DEFAULT;
-	    if(H5O_msg_write(&(dataset->oloc), H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, &(dataset->shared->layout), dxpl_id) < 0)
-		HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update layout message")
-	    break;
+            HDassert(dataset->shared->layout.version > H5O_LAYOUT_VERSION_DEFAULT);
+            dataset->shared->layout.version = H5O_LAYOUT_VERSION_DEFAULT;
+            if(H5O_msg_write(&(dataset->oloc), H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, &(dataset->shared->layout)) < 0)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update layout message")
+            break;
 
-	case H5D_VIRTUAL:
-	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "virtual dataset layout not supported")
+        case H5D_VIRTUAL:
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "virtual dataset layout not supported")
 
         case H5D_LAYOUT_ERROR:
         case H5D_NLAYOUTS:
-	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid dataset layout type")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid dataset layout type")
 
-	default: 
-	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "unknown dataset layout type")
+        default:
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "unknown dataset layout type")
     } /* end switch */
 
 done:
     if(ret_value < 0 && dataset->shared->layout.type == H5D_CHUNKED) {
-	/* Remove new layout message */
-	if(add_new_layout)
-	    if(H5O_msg_remove(&dataset->oloc, H5O_LAYOUT_ID, H5O_ALL, FALSE, dxpl_id) < 0)
-		HDONE_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete layout message")
-
-	/* Add back old layout message */
-	if(delete_old_layout)
-	    if(H5O_msg_create(&dataset->oloc, H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, &dataset->shared->layout, dxpl_id) < 0)
-		HDONE_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to add layout header message")
-
-	/* Clean up v1 b-tree chunk index */
-	if(init_new_index) {
-	    if(H5F_addr_defined(new_idx_info.storage->idx_addr)) {
-		/* Check for valid address i.e. tag */
-		if(!H5F_addr_defined(dataset->oloc.addr))
-		    HDONE_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "address undefined")
-
-		/* Expunge from cache all v1 B-tree type entries associated with tag */
-		if(H5AC_expunge_tag_type_metadata(dataset->oloc.file, dxpl_id, dataset->oloc.addr, H5AC_BT_ID, H5AC__NO_FLAGS_SET))
-		    HDONE_ERROR(H5E_DATASET, H5E_CANTEXPUNGE, FAIL, "unable to expunge index metadata")
-	    } /* end if */
-
-	    /* Delete v1 B-tree chunk index */
-	    if(new_idx_info.storage->ops->dest && (new_idx_info.storage->ops->dest)(&new_idx_info) < 0)
-		HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to release chunk index info")
-	} /* end if */
+        /* Remove new layout message */
+        if(add_new_layout)
+            if(H5O_msg_remove(&dataset->oloc, H5O_LAYOUT_ID, H5O_ALL, FALSE) < 0)
+                HDONE_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete layout message")
+
+        /* Add back old layout message */
+        if(delete_old_layout)
+            if(H5O_msg_create(&dataset->oloc, H5O_LAYOUT_ID, 0, H5O_UPDATE_TIME, &dataset->shared->layout) < 0)
+                HDONE_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to add layout header message")
+
+        /* Clean up v1 b-tree chunk index */
+        if(init_new_index) {
+            if(H5F_addr_defined(new_idx_info.storage->idx_addr)) {
+                /* Check for valid address i.e. tag */
+                if(!H5F_addr_defined(dataset->oloc.addr))
+                    HDONE_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "address undefined")
+
+                /* Expunge from cache all v1 B-tree type entries associated with tag */
+                if(H5AC_expunge_tag_type_metadata(dataset->oloc.file, dataset->oloc.addr, H5AC_BT_ID, H5AC__NO_FLAGS_SET))
+                    HDONE_ERROR(H5E_DATASET, H5E_CANTEXPUNGE, FAIL, "unable to expunge index metadata")
+            } /* end if */
+
+            /* Delete v1 B-tree chunk index */
+            if(new_idx_info.storage->ops->dest && (new_idx_info.storage->ops->dest)(&new_idx_info) < 0)
+                HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to release chunk index info")
+        } /* end if */
     } /* end if */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    if(newlayout != NULL)
+        newlayout = (H5O_layout_t *)H5MM_xfree(newlayout);
+
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
 } /* end H5D__format_convert() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D__mark
- *
- * Purpose:     Mark some aspect of a dataset as dirty
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
+ * Function: H5D__mark
  *
- * Programmer:  Quincey Koziol
- *              July 4, 2008
+ * Purpose:  Mark some aspect of a dataset as dirty
  *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__mark(const H5D_t *dataset, hid_t H5_ATTR_UNUSED dxpl_id, unsigned flags)
+H5D__mark(const H5D_t *dataset, unsigned flags)
 {
     H5O_t *oh = NULL;                   /* Pointer to dataset's object header */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -3168,12 +3025,12 @@ H5D__mark(const H5D_t *dataset, hid_t H5_ATTR_UNUSED dxpl_id, unsigned flags)
         unsigned update_flags = H5O_UPDATE_TIME;        /* Modification time flag */
 
         /* Pin the object header */
-        if(NULL == (oh = H5O_pin(&dataset->oloc, dxpl_id)))
+        if(NULL == (oh = H5O_pin(&dataset->oloc)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTPIN, FAIL, "unable to pin dataset object header")
 
         /* Update the layout on disk, if it's been changed */
         if(flags & H5D_MARK_LAYOUT) {
-            if(H5D__layout_oh_write(dataset, dxpl_id, oh, update_flags) < 0)
+            if(H5D__layout_oh_write(dataset, oh, update_flags) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update layout info")
 
             /* Reset the "update the modification time" flag, so we only do it once */
@@ -3182,7 +3039,7 @@ H5D__mark(const H5D_t *dataset, hid_t H5_ATTR_UNUSED dxpl_id, unsigned flags)
 
         /* Update the dataspace on disk, if it's been changed */
         if(flags & H5D_MARK_SPACE) {
-            if(H5S_write(dataset->oloc.file, dxpl_id, oh, update_flags, dataset->shared->space) < 0)
+            if(H5S_write(dataset->oloc.file, oh, update_flags, dataset->shared->space) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update file with new dataspace")
 
             /* Reset the "update the modification time" flag, so we only do it once */
@@ -3204,105 +3061,125 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D__flush_cb
- *
- * Purpose:     Flush any dataset information cached in memory
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
+ * Function: H5D__flush_all_cb
  *
- * Programmer:  Quincey Koziol
- *              November 8, 2007
+ * Purpose:  Flush any dataset information cached in memory
  *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 static int
-H5D__flush_cb(void *_dataset, hid_t H5_ATTR_UNUSED id, void *_udata)
+H5D__flush_all_cb(void *_dataset, hid_t H5_ATTR_UNUSED id, void *_udata)
 {
-    H5D_t       *dataset = (H5D_t *)_dataset;   /* Dataset pointer */
-    H5D_flush_ud_t *udata = (H5D_flush_ud_t *)_udata;   /* User data for callback */
-    int         ret_value = H5_ITER_CONT;       /* Return value */
+    H5D_t *dataset = (H5D_t *)_dataset; /* Dataset pointer */
+    H5F_t *f = (H5F_t *)_udata;         /* User data for callback */
+    int   ret_value = H5_ITER_CONT;     /* Return value */
 
     FUNC_ENTER_STATIC
 
     /* Check args */
     HDassert(dataset);
+    HDassert(f);
 
     /* Check for dataset in same file */
-    if(udata->f == dataset->oloc.file) {
+    if(f == dataset->oloc.file)
         /* Flush the dataset's information */
-        if(H5D__flush_real(dataset, udata->dxpl_id) < 0)
+        if(H5D__flush_real(dataset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, H5_ITER_ERROR, "unable to flush cached dataset info")
-    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D__flush_cb() */
+} /* end H5D__flush_all_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D_flush
- *
- * Purpose:     Flush any dataset information cached in memory
+ * Function: H5D_flush_all
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:  Ray Lu
- *              August 14, 2002
+ * Purpose:  Flush any dataset information cached in memory
  *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D_flush(const H5F_t *f, hid_t dxpl_id)
+H5D_flush_all(const H5F_t *f)
 {
-    H5D_flush_ud_t udata;               /* User data for callback */
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    herr_t         ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Check args */
     HDassert(f);
 
-    /* Set user data for callback */
-    udata.f = f;
-    udata.dxpl_id = dxpl_id;
-
     /* Iterate over all the open datasets */
-    if(H5I_iterate(H5I_DATASET, H5D__flush_cb, &udata, FALSE) < 0)
+    if(H5I_iterate(H5I_DATASET, H5D__flush_all_cb, (void *)f, FALSE) < 0) /* Casting away const OK -QAK */
         HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to flush cached dataset info")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D_flush() */
+} /* end H5D_flush_all() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_get_create_plist
+ * Function:    H5D__get_create_plist
  *
- * Purpose:	Private function for H5Dget_create_plist
+ * Purpose:     Internal routine to retrieve a dataset's creation property list.
  *
- * Return:	Success:	ID for a copy of the dataset creation
- *				property list.  The template should be
- *				released by calling H5P_close().
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	ID for a copy of the dataset creation property
+ *				list.  The property list ID should be released
+ *				by calling H5Pclose().
  *
  *		Failure:	FAIL
  *
- * Programmer:	Robb Matzke
- *		Tuesday, February  3, 1998
+ * Programmer:	Quincey Koziol
+ *		December 18, 2017
  *
  *-------------------------------------------------------------------------
  */
 hid_t
-H5D_get_create_plist(H5D_t *dset)
+H5D__get_create_plist(const H5D_t *dset)
+{
+    hid_t ret_value = FAIL;     /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(dset);
+
+    /* Retrieve the DCPL */
+    if((ret_value = H5D_get_create_plist(dset)) < 0)
+	HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get dataset's creation property list")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5D__get_create_plist() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5D_get_create_plist
+ *
+ * Purpose:  Private function for H5Dget_create_plist
+ *
+ * Return:   Success:    ID for a copy of the dataset creation
+ *                property list.  The template should be
+ *                released by calling H5P_close().
+ *           Failure:    FAIL
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5D_get_create_plist(const H5D_t *dset)
 {
     H5P_genplist_t      *dcpl_plist;            /* Dataset's DCPL */
     H5P_genplist_t      *new_plist;             /* Copy of dataset's DCPL */
     H5O_layout_t        copied_layout;          /* Layout to tweak */
     H5O_fill_t          copied_fill;            /* Fill value to tweak */
     H5O_efl_t           copied_efl;             /* External file list to tweak */
-    hid_t		new_dcpl_id = FAIL;
-    hid_t		ret_value = H5I_INVALID_HID;    /* Return value */
+    hid_t               new_dcpl_id = FAIL;
+    hid_t               ret_value = H5I_INVALID_HID;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -3317,7 +3194,7 @@ H5D_get_create_plist(H5D_t *dset)
         HGOTO_ERROR(H5E_DATASET, H5E_BADTYPE, FAIL, "can't get property list")
 
     /* Retrieve any object creation properties */
-    if(H5O_get_create_plist(&dset->oloc, H5AC_ind_read_dxpl_id, new_plist) < 0)
+    if(H5O_get_create_plist(&dset->oloc, new_plist) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get object creation info")
 
     /* Get the layout property */
@@ -3343,7 +3220,7 @@ H5D_get_create_plist(H5D_t *dset)
 
             /* Reset index info, if the chunk ops are set */
             if(copied_layout.storage.u.chunk.ops)
-		/* Reset address and pointer of the array struct for the chunked storage index */
+                /* Reset address and pointer of the array struct for the chunked storage index */
                 if(H5D_chunk_idx_reset(&copied_layout.storage.u.chunk, TRUE) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to reset chunked storage index in dest")
 
@@ -3379,7 +3256,7 @@ H5D_get_create_plist(H5D_t *dset)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to copy dataset datatype for fill value")
 
         /* Set up type conversion function */
-        if(NULL == (tpath = H5T_path_find(dset->shared->type, copied_fill.type, NULL, NULL, H5AC_noio_dxpl_id, FALSE)))
+        if(NULL == (tpath = H5T_path_find(dset->shared->type, copied_fill.type)))
             HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest data types")
 
         /* Convert disk form of fill value into memory form */
@@ -3407,7 +3284,7 @@ H5D_get_create_plist(H5D_t *dset)
             } /* end if */
 
             /* Convert fill value */
-            if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, copied_fill.buf, bkg_buf, H5AC_noio_dxpl_id) < 0) {
+            if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, copied_fill.buf, bkg_buf) < 0) {
                 H5I_dec_ref(src_id);
                 H5I_dec_ref(dst_id);
                 if(bkg_buf)
@@ -3460,22 +3337,17 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_get_access_plist
- *
- * Purpose:	Returns a copy of the dataset access property list.
+ * Function: H5D_get_access_plist
  *
- * Return:	Success:	ID for a copy of the dataset access
- *				property list. 
- *
- *		Failure:	FAIL
- *
- * Programmer:	Mohamad Chaarawi
- *		March, 2012
+ * Purpose:  Returns a copy of the dataset access property list.
  *
+ * Return:   Success:    ID for a copy of the dataset access
+ *                       property list.
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 hid_t
-H5D_get_access_plist(H5D_t *dset)
+H5D_get_access_plist(const H5D_t *dset)
 {
     H5P_genplist_t      *old_plist;     /* Default DAPL */
     H5P_genplist_t      *new_plist;     /* New DAPL */
@@ -3510,6 +3382,10 @@ H5D_get_access_plist(H5D_t *dset)
     if(H5P_set(new_plist, H5D_ACS_VDS_PRINTF_GAP_NAME, &(dset->shared->layout.storage.u.virt.printf_gap)) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set VDS printf gap")
 
+    /* Set the vds prefix option */
+    if(H5P_set(new_plist, H5D_ACS_VDS_PREFIX_NAME, &(dset->shared->vds_prefix)) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set vds prefix")
+
     /* Set the external file prefix option */
     if(H5P_set(new_plist, H5D_ACS_EFILE_PREFIX_NAME, &(dset->shared->extfile_prefix)) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set external file prefix")
@@ -3518,41 +3394,35 @@ H5D_get_access_plist(H5D_t *dset)
     ret_value = new_dapl_id;
 
 done:
-    if(ret_value < 0) {
+    if(ret_value < 0)
         if(new_dapl_id > 0)
             if(H5I_dec_app_ref(new_dapl_id) < 0)
                 HDONE_ERROR(H5E_SYM, H5E_CANTDEC, FAIL, "can't free")
-    } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D_get_access_plist() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_get_space
- *
- * Purpose:	Returns and ID for the dataspace of the dataset.
- *
- * Return:	Success:	ID for dataspace
+ * Function: H5D__get_space
  *
- *		Failure:	FAIL
- *
- * Programmer:	Mohamad Chaarawi
- *		March, 2012
+ * Purpose:  Returns and ID for the dataspace of the dataset.
  *
+ * Return:   Success:    ID for dataspace
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 hid_t
-H5D_get_space(H5D_t *dset)
+H5D__get_space(const H5D_t *dset)
 {
-    H5S_t	*space = NULL;
-    hid_t       ret_value = H5I_INVALID_HID;
+    H5S_t    *space = NULL;
+    hid_t     ret_value = H5I_INVALID_HID;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     /* If the layout is virtual, update the extent */
     if(dset->shared->layout.type == H5D_VIRTUAL)
-        if(H5D__virtual_set_extent_unlim(dset, H5AC_ind_read_dxpl_id) < 0)
+        if(H5D__virtual_set_extent_unlim(dset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update virtual dataset extent")
 
     /* Read the dataspace message and return a dataspace object */
@@ -3569,31 +3439,27 @@ done:
             if(H5S_close(space) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release dataspace")
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D_get_space() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5D__get_space() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D_get_type
- *
- * Purpose:	Returns and ID for the datatype of the dataset.
+ * Function: H5D__get_type
  *
- * Return:	Success:	ID for datatype
+ * Purpose:  Returns and ID for the datatype of the dataset.
  *
- *		Failure:	FAIL
- *
- * Programmer:	Mohamad Chaarawi
- *		March, 2012
+ * Return:   Success:    ID for datatype
+ *           Failure:    FAIL
  *
  *-------------------------------------------------------------------------
  */
 hid_t
-H5D_get_type(H5D_t *dset)
+H5D__get_type(const H5D_t *dset)
 {
-    H5T_t	*dt = NULL;
-    hid_t       ret_value = FAIL;
+    H5T_t    *dt = NULL;
+    hid_t     ret_value = FAIL;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Patch the datatype's "top level" file pointer */
     if(H5T_patch_file(dset->shared->type, dset->oloc.file) < 0)
@@ -3615,35 +3481,30 @@ H5D_get_type(H5D_t *dset)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register datatype")
 
 done:
-    if(ret_value < 0) {
+    if(ret_value < 0)
         if(dt && H5T_close(dt) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release datatype")
-    } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D_get_type() */
+} /* end H5D__get_type() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__refresh
- *
- * Purpose:     Refreshes all buffers associated with a dataset.
- *
- * Return:      SUCCEED/FAIL
+ * Function: H5D__refresh
  *
- * Programmer:	Dana Robinson
- *		        November 2015
+ * Purpose:  Refreshes all buffers associated with a dataset.
  *
+ * Return:   SUCCEED/FAIL
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__refresh(hid_t dset_id, H5D_t *dset, hid_t dxpl_id)
+H5D__refresh(hid_t dset_id, H5D_t *dset)
 {
     H5D_virtual_held_file_t *head = NULL;       /* Pointer to list of files held open */
     hbool_t virt_dsets_held = FALSE;            /* Whether virtual datasets' files are held open */
     herr_t      ret_value   = SUCCEED;          /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Sanity check */
     HDassert(dset);
@@ -3657,22 +3518,20 @@ H5D__refresh(hid_t dset_id, H5D_t *dset, hid_t dxpl_id)
         virt_dsets_held = TRUE;
 
         /* Refresh source datasets for virtual dataset */
-        if(H5D__virtual_refresh_source_dsets(dset, dxpl_id) < 0)
+        if(H5D__virtual_refresh_source_dsets(dset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to refresh VDS source datasets")
     } /* end if */
-    
+
     /* Refresh dataset object */
-    if((H5O_refresh_metadata(dset_id, dset->oloc, dxpl_id)) < 0)
+    if((H5O_refresh_metadata(dset_id, dset->oloc)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to refresh dataset")
 
 done:
-    /* Release hold on virtual datasets' files */
-    if(virt_dsets_held) {
-        /* Release the hold on source datasets' files */
+    /* Release hold on (source) virtual datasets' files */
+    if(virt_dsets_held)
         if(H5D__virtual_release_source_dset_files(head) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "can't release VDS source files held open")
-    } /* end if */
 
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5D__refresh() */
 
diff --git a/src/H5Dio.c b/src/H5Dio.c
index b5885e0..1566b5e 100644
--- a/src/H5Dio.c
+++ b/src/H5Dio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -24,6 +22,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Dataset functions			*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free Lists                           */
@@ -51,26 +50,14 @@
 /* Local Prototypes */
 /********************/
 
-/* Internal I/O routines */
-static herr_t H5D__pre_write(H5D_t *dset, hbool_t direct_write, hid_t mem_type_id, 
-    const H5S_t *mem_space, const H5S_t *file_space, hid_t dxpl_id, const void *buf);
-
 /* Setup/teardown routines */
-static herr_t H5D__ioinfo_init(H5D_t *dset,
-#ifndef H5_HAVE_PARALLEL
-const
-#endif /* H5_HAVE_PARALLEL */
-    H5D_dxpl_cache_t *dxpl_cache,
-    hid_t dxpl_id, const H5D_type_info_t *type_info, H5D_storage_t *store,
-    H5D_io_info_t *io_info);
-static herr_t H5D__typeinfo_init(const H5D_t *dset, const H5D_dxpl_cache_t *dxpl_cache,
-    hid_t dxpl_id, hid_t mem_type_id, hbool_t do_write,
-    H5D_type_info_t *type_info);
+static herr_t H5D__ioinfo_init(H5D_t *dset, const H5D_type_info_t *type_info,
+    H5D_storage_t *store, H5D_io_info_t *io_info);
+static herr_t H5D__typeinfo_init(const H5D_t *dset, hid_t mem_type_id,
+    hbool_t do_write, H5D_type_info_t *type_info);
 #ifdef H5_HAVE_PARALLEL
 static herr_t H5D__ioinfo_adjust(H5D_io_info_t *io_info, const H5D_t *dset,
-    hid_t dxpl_id, const H5S_t *file_space, const H5S_t *mem_space,
-    const H5D_type_info_t *type_info, const H5D_chunk_map_t *fm);
-static herr_t H5D__ioinfo_term(H5D_io_info_t *io_info);
+    const H5S_t *file_space, const H5S_t *mem_space, const H5D_type_info_t *type_info);
 #endif /* H5_HAVE_PARALLEL */
 static herr_t H5D__typeinfo_term(const H5D_type_info_t *type_info);
 
@@ -124,22 +111,23 @@ H5FL_DEFINE(H5D_chunk_map_t);
  */
 herr_t
 H5Dread(hid_t dset_id, hid_t mem_type_id, hid_t mem_space_id,
-	hid_t file_space_id, hid_t plist_id, void *buf/*out*/)
+    hid_t file_space_id, hid_t dxpl_id, void *buf/*out*/)
 {
-    H5D_t		   *dset = NULL;
-    const H5S_t		   *mem_space = NULL;
-    const H5S_t		   *file_space = NULL;
-    herr_t                  ret_value = SUCCEED;  /* Return value */
+    H5D_t	    *dset = NULL;
+    const H5S_t	    *mem_space = NULL;
+    const H5S_t	    *file_space = NULL;
+    hbool_t         direct_read = FALSE;
+    herr_t          ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE6("e", "iiiiix", dset_id, mem_type_id, mem_space_id, file_space_id,
-             plist_id, buf);
+             dxpl_id, buf);
 
     /* check arguments */
     if(NULL == (dset = (H5D_t *)H5I_object_verify(dset_id, H5I_DATASET)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
     if(NULL == dset->oloc.file)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
 
     if(mem_space_id < 0 || file_space_id < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
@@ -148,29 +136,78 @@ H5Dread(hid_t dset_id, hid_t mem_type_id, hid_t mem_space_id,
 	if(NULL == (mem_space = (const H5S_t *)H5I_object_verify(mem_space_id, H5I_DATASPACE)))
 	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
-	/* Check for valid selection */
-	if(H5S_SELECT_VALID(mem_space) != TRUE)
-	    HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "selection+offset not within extent")
+        /* Check for valid selection */
+        if(H5S_SELECT_VALID(mem_space) != TRUE)
+            HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "selection+offset not within extent")
     } /* end if */
+
     if(H5S_ALL != file_space_id) {
 	if(NULL == (file_space = (const H5S_t *)H5I_object_verify(file_space_id, H5I_DATASPACE)))
 	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
-	/* Check for valid selection */
-	if(H5S_SELECT_VALID(file_space) != TRUE)
-	    HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "selection+offset not within extent")
+        /* Check for valid selection */
+        if(H5S_SELECT_VALID(file_space) != TRUE)
+            HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "selection+offset not within extent")
     } /* end if */
 
     /* Get the default dataset transfer property list if the user didn't provide one */
-    if (H5P_DEFAULT == plist_id)
-        plist_id= H5P_DATASET_XFER_DEFAULT;
+    if(H5P_DEFAULT == dxpl_id)
+        dxpl_id = H5P_DATASET_XFER_DEFAULT;
     else
-        if(TRUE != H5P_isa_class(plist_id, H5P_DATASET_XFER))
+        if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not xfer parms")
 
-    /* read raw data */
-    if(H5D__read(dset, mem_type_id, mem_space, file_space, plist_id, buf/*out*/) < 0)
-	HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "can't read data")
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
+
+    /* Retrieve the 'direct read' flag */
+    if(H5CX_get_dcr_flag(&direct_read) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error getting flag for direct chunk read")
+
+    /* Set up for direct read of chunk, bypassing filters, etc. */
+    if(direct_read) {
+        hsize_t *direct_offset;         /* Chunk offset from calling routine */
+        hsize_t internal_offset[H5O_LAYOUT_NDIMS];      /* Internal copy of chunk offset */
+        uint32_t direct_filters = 0;    /* Filters for chunk */
+        unsigned u;                     /* Local index variable */
+
+        /* Sanity check */
+        if(H5D_CHUNKED != dset->shared->layout.type)
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a chunked dataset")
+
+        /* Get the direct chunk offset */
+        if(H5CX_get_dcr_offset(&direct_offset) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error getting offset for direct chunk read")
+        HDassert(direct_offset);
+
+        /* The library's chunking code requires the offset terminates with a zero. So transfer the
+         * offset array to an internal offset array */
+        for(u = 0; u < dset->shared->ndims; u++) {
+            /* Make sure the offset doesn't exceed the dataset's dimensions */
+            if(direct_offset[u] > dset->shared->curr_dims[u])
+                HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "offset exceeds dimensions of dataset")
+
+            /* Make sure the offset fall right on a chunk's boundary */
+            if(direct_offset[u] % dset->shared->layout.u.chunk.dim[u])
+                HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "offset doesn't fall on chunks's boundary")
+
+            internal_offset[u] = direct_offset[u];
+        } /* end for */
+
+        /* Terminate the offset with a zero */
+        internal_offset[dset->shared->ndims] = 0;
+
+        /* Read the raw chunk */
+        if(H5D__chunk_direct_read(dset, internal_offset, &direct_filters, buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "can't read chunk directly")
+
+        /* Set the chunk filter mask for application */
+        H5CX_set_dcr_filters(direct_filters);
+    } /* end if */
+    else
+        /* Read raw data */
+        if(H5D__read(dset, mem_type_id, mem_space, file_space, buf/*out*/) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "can't read data")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -210,10 +247,9 @@ done:
  */
 herr_t
 H5Dwrite(hid_t dset_id, hid_t mem_type_id, hid_t mem_space_id,
-	 hid_t file_space_id, hid_t dxpl_id, const void *buf)
+    hid_t file_space_id, hid_t dxpl_id, const void *buf)
 {
     H5D_t		   *dset = NULL;
-    H5P_genplist_t 	   *plist;      /* Property list pointer */
     const H5S_t            *mem_space = NULL;
     const H5S_t            *file_space = NULL;
     hbool_t                 direct_write = FALSE;
@@ -231,35 +267,34 @@ H5Dwrite(hid_t dset_id, hid_t mem_type_id, hid_t mem_space_id,
 
     /* Get the default dataset transfer property list if the user didn't provide one */
     if(H5P_DEFAULT == dxpl_id)
-        dxpl_id= H5P_DATASET_XFER_DEFAULT;
+        dxpl_id = H5P_DATASET_XFER_DEFAULT;
     else
         if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not xfer parms")
 
-    /* Get the dataset transfer property list */
-    if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
 
     /* Retrieve the 'direct write' flag */
-    if(H5P_get(plist, H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME, &direct_write) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "error getting flag for direct chunk write")
+    if(H5CX_get_dcw_flag(&direct_write) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error getting flag for direct chunk read")
 
     /* Check dataspace selections if this is not a direct write */
     if(!direct_write) {
         if(mem_space_id < 0 || file_space_id < 0)
-	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
-	if(H5S_ALL != mem_space_id) {
-	    if(NULL == (mem_space = (const H5S_t *)H5I_object_verify(mem_space_id, H5I_DATASPACE)))
-	        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
+        if(H5S_ALL != mem_space_id) {
+            if(NULL == (mem_space = (const H5S_t *)H5I_object_verify(mem_space_id, H5I_DATASPACE)))
+                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
-	    /* Check for valid selection */
-	    if(H5S_SELECT_VALID(mem_space) != TRUE)
-		HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "memory selection+offset not within extent")
-	} /* end if */
-	if(H5S_ALL != file_space_id) {
-	    if(NULL == (file_space = (const H5S_t *)H5I_object_verify(file_space_id, H5I_DATASPACE)))
-		HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
+            /* Check for valid selection */
+            if(H5S_SELECT_VALID(mem_space) != TRUE)
+                HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "memory selection+offset not within extent")
+        } /* end if */
+        if(H5S_ALL != file_space_id) {
+            if(NULL == (file_space = (const H5S_t *)H5I_object_verify(file_space_id, H5I_DATASPACE)))
+                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
 	    /* Check for valid selection */
 	    if(H5S_SELECT_VALID(file_space) != TRUE)
@@ -267,8 +302,8 @@ H5Dwrite(hid_t dset_id, hid_t mem_type_id, hid_t mem_space_id,
 	} /* end if */
     } /* end if */
 
-    if(H5D__pre_write(dset, direct_write, mem_type_id, mem_space, file_space, dxpl_id, buf) < 0) 
-	HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "can't prepare for writing data")
+    if(H5D__pre_write(dset, direct_write, mem_type_id, mem_space, file_space, buf) < 0) 
+        HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "can't prepare for writing data")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -276,79 +311,69 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5D__pre_write
+ * Function:    H5D__pre_write
  *
- * Purpose:	Preparation for writing data.  
+ * Purpose:     Preparation for writing data.
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Raymond Lu
- *		2 November 2012
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
-static herr_t
+herr_t
 H5D__pre_write(H5D_t *dset, hbool_t direct_write, hid_t mem_type_id, 
-         const H5S_t *mem_space, const H5S_t *file_space, 
-         hid_t dxpl_id, const void *buf)
+    const H5S_t *mem_space, const H5S_t *file_space, const void *buf)
 {
     herr_t                  ret_value = SUCCEED;  /* Return value */
 
-    FUNC_ENTER_STATIC
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Direct chunk write */
     if(direct_write) {
-        H5P_genplist_t *plist;      /* Property list pointer */
         uint32_t direct_filters;
         hsize_t *direct_offset;
         uint32_t direct_datasize;
-	hsize_t  internal_offset[H5O_LAYOUT_NDIMS];
-	unsigned u;                 /* Local index variable */
-
-        /* Get the dataset transfer property list */
-        if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
+        hsize_t  internal_offset[H5O_LAYOUT_NDIMS];
+        unsigned u;                 /* Local index variable */
 
         if(H5D_CHUNKED != dset->shared->layout.type)
-	    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a chunked dataset")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a chunked dataset")
 
         /* Retrieve parameters for direct chunk write */
-        if(H5P_get(plist, H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_NAME, &direct_filters) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "error getting filter info for direct chunk write")
-        if(H5P_get(plist, H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_NAME, &direct_offset) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "error getting offset info for direct chunk write")
-        if(H5P_get(plist, H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_NAME, &direct_datasize) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "error getting data size for direct chunk write")
-
-	/* The library's chunking code requires the offset terminates with a zero. So transfer the 
+        if(H5CX_get_dcw_filters(&direct_filters) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error getting filter info for direct chunk write")
+        if(H5CX_get_dcw_offset(&direct_offset) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error getting offset info for direct chunk write")
+        if(H5CX_get_dcw_datasize(&direct_datasize) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error getting data size for direct chunk write")
+
+        /* The library's chunking code requires the offset terminates with a zero. So transfer the 
          * offset array to an internal offset array */ 
-	for(u = 0; u < dset->shared->ndims; u++) {
-	    /* Make sure the offset doesn't exceed the dataset's dimensions */
+        for(u = 0; u < dset->shared->ndims; u++) {
+            /* Make sure the offset doesn't exceed the dataset's dimensions */
             if(direct_offset[u] > dset->shared->curr_dims[u])
-		HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "offset exceeds dimensions of dataset")
+                HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "offset exceeds dimensions of dataset")
 
             /* Make sure the offset fall right on a chunk's boundary */
-	    if(direct_offset[u] % dset->shared->layout.u.chunk.dim[u])
-		HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "offset doesn't fall on chunks's boundary")
+            if(direct_offset[u] % dset->shared->layout.u.chunk.dim[u])
+                HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL, "offset doesn't fall on chunks's boundary")
 
-	    internal_offset[u] = direct_offset[u]; 
-	} /* end for */
+            internal_offset[u] = direct_offset[u]; 
+        } /* end for */
 	   
 	/* Terminate the offset with a zero */ 
 	internal_offset[dset->shared->ndims] = 0;
 
 	/* write raw data */
-	if(H5D__chunk_direct_write(dset, dxpl_id, direct_filters, internal_offset, direct_datasize, buf) < 0)
+	if(H5D__chunk_direct_write(dset, direct_filters, internal_offset, direct_datasize, buf) < 0)
 	    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "can't write chunk directly")
     } /* end if */
-    else {     /* Normal write */
-        /* write raw data */
-        if(H5D__write(dset, mem_type_id, mem_space, file_space, dxpl_id, buf) < 0)
-	    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "can't write data")
-    } /* end else */
+    else
+        /* Normal write of raw data */
+        if(H5D__write(dset, mem_type_id, mem_space, file_space, buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "can't write data")
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5D__pre_write() */
 
 
@@ -367,7 +392,7 @@ done:
  */
 herr_t
 H5D__read(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
-	 const H5S_t *file_space, hid_t dxpl_id, void *buf/*out*/)
+    const H5S_t *file_space, void *buf/*out*/)
 {
     H5D_chunk_map_t *fm = NULL;         /* Chunk file<->memory mapping */
     H5D_io_info_t io_info;              /* Dataset I/O info     */
@@ -389,14 +414,11 @@ H5D__read(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
     H5D_storage_t store;                /*union of EFL and chunk pointer in file space */
     hssize_t	snelmts;                /*total number of elmts	(signed) */
     hsize_t	nelmts;                 /*total number of elmts	*/
-    hbool_t     io_info_init = FALSE;   /* Whether the I/O info has been initialized */
     hbool_t     io_op_init = FALSE;     /* Whether the I/O op has been initialized */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     char        fake_char;              /* Temporary variable for NULL buffer pointers */
     herr_t	ret_value = SUCCEED;	/* Return value	*/
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, dataset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_VOL_TAG(dataset->oloc.addr)
 
     /* check args */
     HDassert(dataset && dataset->oloc.file);
@@ -409,20 +431,24 @@ H5D__read(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dst dataspace has invalid selection")
     H5_CHECKED_ASSIGN(nelmts, hsize_t, snelmts, hssize_t);
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Set up datatype info for operation */
-    if(H5D__typeinfo_init(dataset, dxpl_cache, dxpl_id, mem_type_id, FALSE, &type_info) < 0)
+    if(H5D__typeinfo_init(dataset, mem_type_id, FALSE, &type_info) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to set up type info")
     type_info_init = TRUE;
 
 #ifdef H5_HAVE_PARALLEL
-    /* Collective access is not permissible without a MPI based VFD */
-    if(dxpl_cache->xfer_mode == H5FD_MPIO_COLLECTIVE && 
-            !(H5F_HAS_FEATURE(dataset->oloc.file, H5FD_FEAT_HAS_MPI)))
-        HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "collective access for MPI-based drivers only")
+    /* Check for non-MPI-based VFD */
+    if(!(H5F_HAS_FEATURE(dataset->oloc.file, H5FD_FEAT_HAS_MPI))) {
+        H5FD_mpio_xfer_t io_xfer_mode;      /* MPI I/O transfer mode */
+
+        /* Get I/O transfer mode */
+        if(H5CX_get_io_xfer_mode(&io_xfer_mode) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
+
+        /* Collective access is not permissible without a MPI based VFD */
+        if(io_xfer_mode == H5FD_MPIO_COLLECTIVE)
+            HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "collective access for MPI-based drivers only")
+    } /* end if */
 #endif /*H5_HAVE_PARALLEL*/
 
     /* Make certain that the number of elements in each selection is the same */
@@ -506,8 +532,7 @@ H5D__read(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
             HGOTO_DONE(SUCCEED)
 
         /* Go fill the user's selection with the dataset's fill value */
-        if(H5D__fill(dataset->shared->dcpl_cache.fill.buf, dataset->shared->type, buf, 
-                     type_info.mem_type, mem_space, dxpl_id) < 0)
+        if(H5D__fill(dataset->shared->dcpl_cache.fill.buf, dataset->shared->type, buf, type_info.mem_type, mem_space) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "filling buf failed")
         else
             HGOTO_DONE(SUCCEED)
@@ -516,9 +541,8 @@ H5D__read(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
     /* Set up I/O operation */
     io_info.op_type = H5D_IO_OP_READ;
     io_info.u.rbuf = buf;
-    if(H5D__ioinfo_init(dataset, dxpl_cache, dxpl_id, &type_info, &store, &io_info) < 0)
+    if(H5D__ioinfo_init(dataset, &type_info, &store, &io_info) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to set up I/O operation")
-    io_info_init = TRUE;
 
     /* Sanity check that space is allocated, if there are elements */
     if(nelmts > 0)
@@ -537,7 +561,7 @@ H5D__read(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
 
 #ifdef H5_HAVE_PARALLEL
     /* Adjust I/O info for any parallel I/O */
-    if(H5D__ioinfo_adjust(&io_info, dataset, dxpl_id, file_space, mem_space, &type_info, fm) < 0)
+    if(H5D__ioinfo_adjust(&io_info, dataset, file_space, mem_space, &type_info) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to adjust I/O info for parallel I/O")
 #endif /*H5_HAVE_PARALLEL*/
 
@@ -552,19 +576,6 @@ done:
     if(fm)
         fm = H5FL_FREE(H5D_chunk_map_t, fm);
 
-    if(io_info_init) {
-#ifdef H5_DEBUG_BUILD
-        /* release the metadata dxpl that was copied in the init function */
-        if(H5I_dec_ref(io_info.md_dxpl_id) < 0)
-            HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "can't close metadata dxpl")
-#endif /* H5_DEBUG_BUILD */
-#ifdef H5_HAVE_PARALLEL
-        /* Shut down io_info struct */
-        if(H5D__ioinfo_term(&io_info) < 0)
-            HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "can't shut down io_info")
-#endif /*H5_HAVE_PARALLEL*/
-    }
-
     /* Shut down datatype info for operation */
     if(type_info_init && H5D__typeinfo_term(&type_info) < 0)
         HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to shut down type info")
@@ -574,7 +585,7 @@ done:
         if(H5S_close(projected_mem_space) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to shut down projected memory dataspace")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
 } /* end H5D__read() */
 
 
@@ -593,7 +604,7 @@ done:
  */
 herr_t
 H5D__write(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
-	  const H5S_t *file_space, hid_t dxpl_id, const void *buf)
+    const H5S_t *file_space, const void *buf)
 {
     H5D_chunk_map_t *fm = NULL;         /* Chunk file<->memory mapping */
     H5D_io_info_t io_info;              /* Dataset I/O info     */
@@ -615,14 +626,11 @@ H5D__write(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
     H5D_storage_t store;                /*union of EFL and chunk pointer in file space */
     hssize_t	snelmts;                /*total number of elmts	(signed) */
     hsize_t	nelmts;                 /*total number of elmts	*/
-    hbool_t     io_info_init = FALSE;   /* Whether the I/O info has been initialized */
     hbool_t     io_op_init = FALSE;     /* Whether the I/O op has been initialized */
-    H5D_dxpl_cache_t _dxpl_cache;       /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache;   /* Data transfer property cache */
     char        fake_char;              /* Temporary variable for NULL buffer pointers */
     herr_t	ret_value = SUCCEED;	/* Return value	*/
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, dataset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(dataset->oloc.addr)
 
     /* check args */
     HDassert(dataset && dataset->oloc.file);
@@ -639,12 +647,8 @@ H5D__write(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
     if(0 == (H5F_INTENT(dataset->oloc.file) & H5F_ACC_RDWR))
 	HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "no write intent on file")
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Set up datatype info for operation */
-    if(H5D__typeinfo_init(dataset, dxpl_cache, dxpl_id, mem_type_id, TRUE, &type_info) < 0)
+    if(H5D__typeinfo_init(dataset, mem_type_id, TRUE, &type_info) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to set up type info")
     type_info_init = TRUE;
 
@@ -666,15 +670,16 @@ H5D__write(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
         if(H5T_get_class(type_info.mem_type, TRUE) == H5T_REFERENCE &&
                 H5T_get_ref_type(type_info.mem_type) == H5R_DATASET_REGION)
             HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "Parallel IO does not support writing region reference datatypes yet")
-
-        /* Can't write to chunked datasets with filters, in parallel */
-        if(dataset->shared->layout.type == H5D_CHUNKED &&
-                dataset->shared->dcpl_cache.pline.nused > 0)
-            HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "cannot write to chunked storage with filters in parallel")
     } /* end if */
     else {
+        H5FD_mpio_xfer_t io_xfer_mode;      /* MPI I/O transfer mode */
+
+        /* Get I/O transfer mode */
+        if(H5CX_get_io_xfer_mode(&io_xfer_mode) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
+
         /* Collective access is not permissible without a MPI based VFD */
-        if(dxpl_cache->xfer_mode == H5FD_MPIO_COLLECTIVE)
+        if(io_xfer_mode == H5FD_MPIO_COLLECTIVE)
             HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "collective access for MPI-based driver only")
     } /* end else */
 #endif /*H5_HAVE_PARALLEL*/
@@ -748,9 +753,8 @@ H5D__write(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
     /* Set up I/O operation */
     io_info.op_type = H5D_IO_OP_WRITE;
     io_info.u.wbuf = buf;
-    if(H5D__ioinfo_init(dataset, dxpl_cache, dxpl_id, &type_info, &store, &io_info) < 0)
+    if(H5D__ioinfo_init(dataset, &type_info, &store, &io_info) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to set up I/O operation")
-    io_info_init = TRUE;
 
     /* Allocate dataspace and initialize it if it hasn't been. */
     if(nelmts > 0 && dataset->shared->dcpl_cache.efl.nused == 0 &&
@@ -784,7 +788,7 @@ H5D__write(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
 
 #ifdef H5_HAVE_PARALLEL
     /* Adjust I/O info for any parallel I/O */
-    if(H5D__ioinfo_adjust(&io_info, dataset, dxpl_id, file_space, mem_space, &type_info, fm) < 0)
+    if(H5D__ioinfo_adjust(&io_info, dataset, file_space, mem_space, &type_info) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to adjust I/O info for parallel I/O")
 #endif /*H5_HAVE_PARALLEL*/
 
@@ -806,7 +810,7 @@ H5D__write(H5D_t *dataset, hid_t mem_type_id, const H5S_t *mem_space,
      * Update modification time.  We have to do this explicitly because
      * writing to a dataset doesn't necessarily change the object header.
      */
-    if(H5O_touch(&(dataset->oloc), FALSE, dxpl_id) < 0)
+    if(H5O_touch(&(dataset->oloc), FALSE) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update modification time")
 #endif /* OLD_WAY */
 
@@ -817,19 +821,6 @@ done:
     if(fm)
         fm = H5FL_FREE(H5D_chunk_map_t, fm);
 
-    if(io_info_init) {
-#ifdef H5_DEBUG_BUILD
-        /* release the metadata dxpl that was copied in the init function */
-        if(H5I_dec_ref(io_info.md_dxpl_id) < 0)
-            HDONE_ERROR(H5E_DATASET, H5E_CANTDEC, FAIL, "can't close metadata dxpl")
-#endif /* H5_DEBUG_BUILD */
-#ifdef H5_HAVE_PARALLEL
-        /* Shut down io_info struct */
-        if(H5D__ioinfo_term(&io_info) < 0)
-            HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "can't shut down io_info")
-#endif /*H5_HAVE_PARALLEL*/
-    }
-
     /* Shut down datatype info for operation */
     if(type_info_init && H5D__typeinfo_term(&type_info) < 0)
         HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to shut down type info")
@@ -839,7 +830,7 @@ done:
         if(H5S_close(projected_mem_space) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEOBJ, FAIL, "unable to shut down projected memory dataspace")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__write() */
 
 
@@ -857,16 +848,10 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__ioinfo_init(H5D_t *dset,
-#ifndef H5_HAVE_PARALLEL
-const
-#endif /* H5_HAVE_PARALLEL */
-    H5D_dxpl_cache_t *dxpl_cache, hid_t dxpl_id,
-    const H5D_type_info_t *type_info, H5D_storage_t *store, H5D_io_info_t *io_info)
+H5D__ioinfo_init(H5D_t *dset, const H5D_type_info_t *type_info,
+    H5D_storage_t *store, H5D_io_info_t *io_info)
 {
-    herr_t ret_value = SUCCEED;
-
-    FUNC_ENTER_STATIC
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(dset);
@@ -875,19 +860,8 @@ const
     HDassert(type_info->tpath);
     HDassert(io_info);
 
-    /* init both dxpls to the original one */
-    io_info->md_dxpl_id = dxpl_id;
-    io_info->raw_dxpl_id = dxpl_id;
-
-    /* set the dxpl IO type for sanity checking at the FD layer */
-#ifdef H5_DEBUG_BUILD
-    if(H5D_set_io_info_dxpls(io_info, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't set metadata and raw data dxpls")
-#endif /* H5_DEBUG_BUILD */
-
     /* Set up "normal" I/O fields */
     io_info->dset = dset;
-    io_info->dxpl_cache = dxpl_cache;
     io_info->store = store;
 
     /* Set I/O operations to initial values */
@@ -919,8 +893,7 @@ const
     io_info->using_mpi_vfd = H5F_HAS_FEATURE(dset->oloc.file, H5FD_FEAT_HAS_MPI);
 #endif /* H5_HAVE_PARALLEL */
 
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5D__ioinfo_init() */
 
 
@@ -938,12 +911,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__typeinfo_init(const H5D_t *dset, const H5D_dxpl_cache_t *dxpl_cache,
-    hid_t dxpl_id, hid_t mem_type_id, hbool_t do_write,
+H5D__typeinfo_init(const H5D_t *dset, hid_t mem_type_id, hbool_t do_write,
     H5D_type_info_t *type_info)
 {
     const H5T_t	*src_type;              /* Source datatype */
     const H5T_t	*dst_type;              /* Destination datatype */
+    H5Z_data_xform_t *data_transform;   /* Data transform info */
     herr_t ret_value = SUCCEED;	        /* Return value	*/
 
     FUNC_ENTER_STATIC
@@ -985,22 +958,40 @@ H5D__typeinfo_init(const H5D_t *dset, const H5D_dxpl_cache_t *dxpl_cache,
      * enough value in xfer_parms since turning off datatype conversion also
      * turns off background preservation.
      */
-    if(NULL == (type_info->tpath = H5T_path_find(src_type, dst_type, NULL, NULL, dxpl_id, FALSE)))
+    if(NULL == (type_info->tpath = H5T_path_find(src_type, dst_type)))
 	HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest datatype")
 
+    /* Retrieve info from API context */
+    if(H5CX_get_data_transform(&data_transform) < 0)
+	HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get data transform info")
+
     /* Precompute some useful information */
     type_info->src_type_size = H5T_get_size(src_type);
     type_info->dst_type_size = H5T_get_size(dst_type);
     type_info->max_type_size = MAX(type_info->src_type_size, type_info->dst_type_size);
     type_info->is_conv_noop = H5T_path_noop(type_info->tpath);
-    type_info->is_xform_noop = H5Z_xform_noop(dxpl_cache->data_xform_prop);
+    type_info->is_xform_noop = H5Z_xform_noop(data_transform);
     if(type_info->is_xform_noop && type_info->is_conv_noop) {
         type_info->cmpd_subset = NULL;
         type_info->need_bkg = H5T_BKG_NO;
     } /* end if */
     else {
+        void	*tconv_buf;		/* Temporary conversion buffer pointer */
+        void	*bkgr_buf;		/* Background conversion buffer pointer */
+        size_t	max_temp_buf;		/* Maximum temporary buffer size */
+        H5T_bkg_t bkgr_buf_type;        /* Background buffer type */
         size_t	target_size;		/* Desired buffer size	*/
 
+        /* Get info from API context */
+        if(H5CX_get_max_temp_buf(&max_temp_buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve max. temp. buf size")
+        if(H5CX_get_tconv_buf(&tconv_buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve temp. conversion buffer pointer")
+        if(H5CX_get_bkgr_buf(&bkgr_buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve background conversion buffer pointer")
+        if(H5CX_get_bkgr_buf_type(&bkgr_buf_type) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve background buffer type")
+
         /* Check if the datatypes are compound subsets of one another */
         type_info->cmpd_subset = H5T_path_compound_subset(type_info->tpath);
 
@@ -1012,7 +1003,7 @@ H5D__typeinfo_init(const H5D_t *dset, const H5D_dxpl_cache_t *dxpl_cache,
 
             if((path_bkg = H5T_path_bkg(type_info->tpath))) {
                 /* Retrieve the bkgr buffer property */
-                type_info->need_bkg = dxpl_cache->bkgr_buf_type;
+                type_info->need_bkg = bkgr_buf_type;
                 type_info->need_bkg = MAX(path_bkg, type_info->need_bkg);
             } /* end if */
             else
@@ -1022,16 +1013,15 @@ H5D__typeinfo_init(const H5D_t *dset, const H5D_dxpl_cache_t *dxpl_cache,
 
         /* Set up datatype conversion/background buffers */
 
-        /* Get buffer size from DXPL */
-        target_size = dxpl_cache->max_temp_buf;
+        target_size = max_temp_buf;
 
         /* If the buffer is too small to hold even one element, try to make it bigger */
         if(target_size < type_info->max_type_size) {
             hbool_t default_buffer_info;    /* Whether the buffer information are the defaults */
 
             /* Detect if we have all default settings for buffers */
-            default_buffer_info = (hbool_t)((H5D_TEMP_BUF_SIZE == dxpl_cache->max_temp_buf)
-                    && (NULL == dxpl_cache->tconv_buf) && (NULL == dxpl_cache->bkgr_buf));
+            default_buffer_info = (hbool_t)((H5D_TEMP_BUF_SIZE == max_temp_buf)
+                    && (NULL == tconv_buf) && (NULL == bkgr_buf));
 
             /* Check if we are using the default buffer info */
             if(default_buffer_info)
@@ -1056,20 +1046,20 @@ H5D__typeinfo_init(const H5D_t *dset, const H5D_dxpl_cache_t *dxpl_cache,
          * malloc() is usually less resource-intensive if we allocate/free the
          * same size over and over.
          */
-        if(NULL == (type_info->tconv_buf = (uint8_t *)dxpl_cache->tconv_buf)) {
+        if(NULL == (type_info->tconv_buf = (uint8_t *)tconv_buf)) {
             /* Allocate temporary buffer */
             if(NULL == (type_info->tconv_buf = H5FL_BLK_MALLOC(type_conv, target_size)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for type conversion")
             type_info->tconv_buf_allocated = TRUE;
         } /* end if */
-        if(type_info->need_bkg && NULL == (type_info->bkg_buf = (uint8_t *)dxpl_cache->bkgr_buf)) {
+        if(type_info->need_bkg && NULL == (type_info->bkg_buf = (uint8_t *)bkgr_buf)) {
             size_t	bkg_size;		/* Desired background buffer size	*/
 
             /* Compute the background buffer size */
             /* (don't try to use buffers smaller than the default size) */
             bkg_size = type_info->request_nelmts * type_info->dst_type_size;
-            if(bkg_size < dxpl_cache->max_temp_buf)
-                bkg_size = dxpl_cache->max_temp_buf;
+            if(bkg_size < max_temp_buf)
+                bkg_size = max_temp_buf;
 
             /* Allocate background buffer */
             /* (Need calloc()-like call since memory needs to be initialized) */
@@ -1098,13 +1088,10 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__ioinfo_adjust(H5D_io_info_t *io_info, const H5D_t *dset, hid_t dxpl_id,
+H5D__ioinfo_adjust(H5D_io_info_t *io_info, const H5D_t *dset,
     const H5S_t *file_space, const H5S_t *mem_space,
-    const H5D_type_info_t *type_info, const H5D_chunk_map_t *fm)
+    const H5D_type_info_t *type_info)
 {
-    H5P_genplist_t *dx_plist;       /* Data transer property list */
-    H5D_mpio_actual_chunk_opt_mode_t actual_chunk_opt_mode; /* performed chunk optimization */
-    H5D_mpio_actual_io_mode_t actual_io_mode; /* performed io mode */
     herr_t	ret_value = SUCCEED;	/* Return value	*/
 
     FUNC_ENTER_STATIC
@@ -1118,36 +1105,30 @@ H5D__ioinfo_adjust(H5D_io_info_t *io_info, const H5D_t *dset, hid_t dxpl_id,
     HDassert(type_info->tpath);
     HDassert(io_info);
 
-    /* Get the dataset transfer property list */
-    if(NULL == (dx_plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
     /* Reset the actual io mode properties to the default values in case
-     * the dxpl was previously used in a collective I/O operation.
+     * the DXPL (if it's non-default) was previously used in a collective
+     * I/O operation.
      */
-    actual_chunk_opt_mode = H5D_MPIO_NO_CHUNK_OPTIMIZATION;
-    actual_io_mode = H5D_MPIO_NO_COLLECTIVE;
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property")
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property")
+    if(!H5CX_is_def_dxpl()) {
+        H5CX_set_mpio_actual_chunk_opt(H5D_MPIO_NO_CHUNK_OPTIMIZATION);
+        H5CX_set_mpio_actual_io_mode(H5D_MPIO_NO_COLLECTIVE);
+    } /* end if */
 
     /* Make any parallel I/O adjustments */
     if(io_info->using_mpi_vfd) {
+        H5FD_mpio_xfer_t xfer_mode; /* Parallel transfer for this request */
         htri_t opt;         /* Flag whether a selection is optimizable */
 
-        /* Record the original state of parallel I/O transfer options */
-        io_info->orig.xfer_mode = io_info->dxpl_cache->xfer_mode;
-        io_info->orig.coll_opt_mode = io_info->dxpl_cache->coll_opt_mode;
-        io_info->orig.io_ops.single_read = io_info->io_ops.single_read;
-        io_info->orig.io_ops.single_write = io_info->io_ops.single_write;
+        /* Get the original state of parallel I/O transfer mode */
+        if(H5CX_get_io_xfer_mode(&xfer_mode) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
 
         /* Get MPI communicator */
         if(MPI_COMM_NULL == (io_info->comm = H5F_mpi_get_comm(dset->oloc.file)))
             HGOTO_ERROR(H5E_DATASPACE, H5E_CANTGET, FAIL, "can't retrieve MPI communicator")
 
         /* Check if we can set direct MPI-IO read/write functions */
-        if((opt = H5D__mpio_opt_possible(io_info, file_space, mem_space, type_info, fm, dx_plist)) < 0)
+        if((opt = H5D__mpio_opt_possible(io_info, file_space, mem_space, type_info)) < 0)
             HGOTO_ERROR(H5E_DATASPACE, H5E_BADRANGE, FAIL, "invalid check for direct IO dataspace ")
 
         /* Check if we can use the optimized parallel I/O routines */
@@ -1159,15 +1140,76 @@ H5D__ioinfo_adjust(H5D_io_info_t *io_info, const H5D_t *dset, hid_t dxpl_id,
             io_info->io_ops.single_write = H5D__mpio_select_write;
         } /* end if */
         else {
+            /* Check if there are any filters in the pipeline. If there are,
+             * we cannot break to independent I/O if this is a write operation;
+             * otherwise there will be metadata inconsistencies in the file.
+             */
+            if (io_info->op_type == H5D_IO_OP_WRITE && io_info->dset->shared->dcpl_cache.pline.nused > 0) {
+                H5D_mpio_no_collective_cause_t  cause;
+                uint32_t                        local_no_collective_cause;
+                uint32_t                        global_no_collective_cause;
+                hbool_t                         local_error_message_previously_written = FALSE;
+                hbool_t                         global_error_message_previously_written = FALSE;
+                size_t                          index;
+                char                            local_no_collective_cause_string[256] = "";
+                char                            global_no_collective_cause_string[256] = "";
+                const char                     *cause_strings[] = { "independent I/O was requested",
+                                                                    "datatype conversions were required",
+                                                                    "data transforms needed to be applied",
+                                                                    "optimized MPI types flag wasn't set",
+                                                                    "one of the dataspaces was neither simple nor scalar",
+                                                                    "dataset was not contiguous or chunked" };
+
+                if(H5CX_get_mpio_local_no_coll_cause(&local_no_collective_cause) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get local no collective cause value")
+                if(H5CX_get_mpio_global_no_coll_cause(&global_no_collective_cause) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to get global no collective cause value")
+
+                /* Append each of the "reason for breaking collective I/O" error messages to the
+                 * local and global no collective cause strings */
+                for (cause = 1, index = 0; cause < H5D_MPIO_NO_COLLECTIVE_MAX_CAUSE; cause <<= 1, index++) {
+                    size_t cause_strlen = HDstrlen(cause_strings[index]);
+
+                    if (cause & local_no_collective_cause) {
+                        /* Check if there were any previous error messages included. If so, prepend a semicolon
+                         * to separate the messages.
+                         */
+                        if(local_error_message_previously_written)
+                            HDstrncat(local_no_collective_cause_string, "; ", 2);
+
+                        HDstrncat(local_no_collective_cause_string, cause_strings[index], cause_strlen);
+
+                        local_error_message_previously_written = TRUE;
+                    } /* end if */
+
+                    if(cause & global_no_collective_cause) {
+                        /* Check if there were any previous error messages included. If so, prepend a semicolon
+                         * to separate the messages.
+                         */
+                        if(global_error_message_previously_written)
+                            HDstrncat(global_no_collective_cause_string, "; ", 2);
+
+                        HDstrncat(global_no_collective_cause_string, cause_strings[index], cause_strlen);
+
+                        global_error_message_previously_written = TRUE;
+                    } /* end if */
+                } /* end for */
+
+                HGOTO_ERROR(H5E_IO, H5E_NO_INDEPENDENT, FAIL, "Can't perform independent write with filters in pipeline.\n"
+                                                              "    The following caused a break from collective I/O:\n"
+                                                              "        Local causes: %s\n"
+                                                              "        Global causes: %s",
+                                                              local_no_collective_cause_string,
+                                                              global_no_collective_cause_string);
+            } /* end if */
+
             /* If we won't be doing collective I/O, but the user asked for
-             * collective I/O, change the request to use independent I/O, but
-             * mark it so that we remember to revert the change.
+             * collective I/O, change the request to use independent I/O
              */
-            if(io_info->dxpl_cache->xfer_mode == H5FD_MPIO_COLLECTIVE) {
+            if(xfer_mode == H5FD_MPIO_COLLECTIVE) {
                 /* Change the xfer_mode to independent for handling the I/O */
-                io_info->dxpl_cache->xfer_mode = H5FD_MPIO_INDEPENDENT;
-                if(H5P_set(dx_plist, H5D_XFER_IO_XFER_MODE_NAME, &io_info->dxpl_cache->xfer_mode) < 0)
-                    HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set transfer mode")
+                if(H5CX_set_io_xfer_mode(H5FD_MPIO_INDEPENDENT) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set MPI-I/O transfer mode")
             } /* end if */
         } /* end else */
     } /* end if */
@@ -1175,62 +1217,7 @@ H5D__ioinfo_adjust(H5D_io_info_t *io_info, const H5D_t *dset, hid_t dxpl_id,
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__ioinfo_adjust() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5D__ioinfo_term
- *
- * Purpose:	Common logic for terminating an I/O info object
- *              (Only used for restoring MPI transfer mode currently)
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		Friday, February  6, 2004
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5D__ioinfo_term(H5D_io_info_t *io_info)
-{
-    herr_t	ret_value = SUCCEED;	/*return value		*/
-
-    FUNC_ENTER_STATIC
-
-    /* Check if we used the MPI VFD for the I/O */
-    if(io_info->using_mpi_vfd) {
-        /* Check if we need to revert the change to the xfer mode */
-        if(io_info->orig.xfer_mode != io_info->dxpl_cache->xfer_mode) {
-            H5P_genplist_t *dx_plist;           /* Data transer property list */
-
-            /* Get the dataset transfer property list */
-            if(NULL == (dx_plist = (H5P_genplist_t *)H5I_object(io_info->raw_dxpl_id)))
-                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
-            /* Restore the original parallel I/O mode */
-            if(H5P_set(dx_plist, H5D_XFER_IO_XFER_MODE_NAME, &io_info->orig.xfer_mode) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set transfer mode")
-        } /* end if */
-
-        /* Check if we need to revert the change to the collective opt mode */
-        if(io_info->orig.coll_opt_mode != io_info->dxpl_cache->coll_opt_mode) {
-            H5P_genplist_t *dx_plist;           /* Data transer property list */
-
-            /* Get the dataset transfer property list */
-            if(NULL == (dx_plist = (H5P_genplist_t *)H5I_object(io_info->raw_dxpl_id)))
-                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
-            /* Restore the original parallel I/O mode */
-            if(H5P_set(dx_plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, &io_info->orig.coll_opt_mode) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set collective option mode")
-        } /* end if */
-    } /* end if */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D__ioinfo_term() */
-
-#endif /* H5_HAVE_PARALLEL */
+#endif /*H5_HAVE_PARALLEL*/
 
 
 /*-------------------------------------------------------------------------
@@ -1263,53 +1250,3 @@ H5D__typeinfo_term(const H5D_type_info_t *type_info)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5D__typeinfo_term() */
 
-#ifdef H5_DEBUG_BUILD
-
-/*-------------------------------------------------------------------------
- * Function:	H5D_set_io_info_dxpls
- *
- * Purpose:	Set the metadata and raw data dxpls in an io_info struct 
- *              for sanity checking at the H5FD layer.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Mohamad Chaarawi
- *              January 2016
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5D_set_io_info_dxpls(H5D_io_info_t *io_info, hid_t dxpl_id)
-{
-    H5P_genplist_t  *xfer_plist = NULL; /* Dataset transfer property list object */
-    H5FD_dxpl_type_t  dxpl_type;    /* Property indicating the type of the internal dxpl */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Get the property list object */
-    if (NULL == (xfer_plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_DATASET, H5E_BADATOM, FAIL, "can't get new property list object")
-            
-    /* create the metadata dxpl */
-    if((io_info->md_dxpl_id = H5P_copy_plist(xfer_plist, FALSE)) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "can't copy dxpl")
-
-    /* Set the dxpl type property  */
-    dxpl_type = H5FD_RAWDATA_DXPL;
-    if(H5P_set(xfer_plist, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set dxpl type property")
-
-    /* Get the property list object */
-    if (NULL == (xfer_plist = (H5P_genplist_t *)H5I_object(io_info->md_dxpl_id)))
-        HGOTO_ERROR(H5E_DATASET, H5E_BADATOM, FAIL, "can't get new property list object")
-
-    /* Set the dxpl type property  */
-    dxpl_type = H5FD_METADATA_DXPL;
-    if(H5P_set(xfer_plist, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set dxpl type property")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D_set_io_info_dxpls */
-#endif /* H5_DEBUG_BUILD */
diff --git a/src/H5Dlayout.c b/src/H5Dlayout.c
index cb2eca2..c8afb8e 100644
--- a/src/H5Dlayout.c
+++ b/src/H5Dlayout.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -27,6 +25,7 @@
 #include "H5Dpkg.h"             /* Datasets                                 */
 #include "H5Eprivate.h"         /* Error handling                           */
 #include "H5HLprivate.h"        /* Local heaps                              */
+#include "H5MMprivate.h"        /* Memory management                        */
 
 
 /****************/
@@ -48,6 +47,12 @@
 /* Package Variables */
 /*********************/
 
+/* Format version bounds for layout */
+const unsigned H5O_layout_ver_bounds[] = {
+    H5O_LAYOUT_VERSION_1,       /* H5F_LIBVER_EARLIEST */
+    H5O_LAYOUT_VERSION_3,       /* H5F_LIBVER_V18 */  /* H5O_LAYOUT_VERSION_DEFAULT */
+    H5O_LAYOUT_VERSION_LATEST   /* H5F_LIBVER_LATEST */
+};
 
 /*****************************/
 /* Library Private Variables */
@@ -59,6 +64,7 @@
 /*******************/
 
 
+
 
 /*-------------------------------------------------------------------------
  * Function:    H5D__layout_set_io_ops
@@ -279,49 +285,47 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D__layout_set_latest_version
+ * Function:    H5D__layout_set_version
  *
- * Purpose:     Set the encoding for a layout to the latest version.
- *              Part of the coding in this routine is moved to
- *              H5D__layout_set_latest_indexing().
+ * Purpose:     Set the version to encode a layout with.
  *
  * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:  Quincey Koziol
- *              Thursday, January 15, 2009
+ * Programmer:  Vailin Choi; December 2017
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__layout_set_latest_version(H5O_layout_t *layout, const H5S_t *space, 
-    const H5D_dcpl_cache_t *dcpl_cache)
+H5D__layout_set_version(H5F_t *f, H5O_layout_t *layout)
 {
-    herr_t ret_value = SUCCEED;         /* Return value */
+    unsigned version;           /* Message version */
+    herr_t ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity check */
     HDassert(layout);
-    HDassert(space);
-    HDassert(dcpl_cache);
+    HDassert(f);
 
-    /* Set encoding of layout to latest version */
-    layout->version = H5O_LAYOUT_VERSION_LATEST;
+    /* Upgrade to the version indicated by the file's low bound if higher */
+    version = MAX(layout->version, H5O_layout_ver_bounds[H5F_LOW_BOUND(f)]);
 
-    /* Set the latest indexing type for the layout message */
-    if(H5D__layout_set_latest_indexing(layout, space, dcpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set latest indexing type")
+    /* Version bounds check */
+    if(version > H5O_layout_ver_bounds[H5F_HIGH_BOUND(f)])
+        HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, FAIL, "layout version out of bounds")
+
+    /* Set the message version */
+    layout->version = version;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D__layout_set_latest_version() */
+} /* end H5D__layout_set_version() */
 
 
 /*-------------------------------------------------------------------------
  * Function:    H5D__layout_set_latest_indexing
  *
  * Purpose:     Set the latest indexing type for a layout message
- *              This is moved from H5D_layout_set_latest_version().
  *
  * Return:      Non-negative on success/Negative on failure
  *
@@ -456,8 +460,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
-    hid_t dapl_id)
+H5D__layout_oh_create(H5F_t *file, H5O_t *oh, H5D_t *dset, hid_t dapl_id)
 {
     H5O_layout_t        *layout;        /* Dataset's layout information */
     const H5O_fill_t    *fill_prop;     /* Pointer to dataset's fill value information */
@@ -465,7 +468,7 @@ H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
     hbool_t             layout_init = FALSE;    /* Flag to indicate that chunk information was initialized */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, dset->oloc.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(dset->oloc.addr)
 
     /* Sanity checking */
     HDassert(file);
@@ -481,12 +484,12 @@ H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
         H5O_pline_t     *pline;         /* Dataset's I/O pipeline information */
 
         pline = &dset->shared->dcpl_cache.pline;
-        if(pline->nused > 0 && H5O_msg_append_oh(file, dxpl_id, oh, H5O_PLINE_ID, H5O_MSG_FLAG_CONSTANT, 0, pline) < 0)
+        if(pline->nused > 0 && H5O_msg_append_oh(file, oh, H5O_PLINE_ID, H5O_MSG_FLAG_CONSTANT, 0, pline) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update filter header message")
     } /* end if */
 
     /* Initialize the layout information for the new dataset */
-    if(dset->shared->layout.ops->init && (dset->shared->layout.ops->init)(file, dxpl_id, dset, dapl_id) < 0)
+    if(dset->shared->layout.ops->init && (dset->shared->layout.ops->init)(file, dset, dapl_id) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize layout information")
 
     /* Indicate that the layout information was initialized */
@@ -500,12 +503,11 @@ H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
         H5D_io_info_t io_info;
 
         io_info.dset = dset;
-        io_info.raw_dxpl_id = H5AC_rawdata_dxpl_id;
-        io_info.md_dxpl_id = dxpl_id;
 
         if(H5D__alloc_storage(&io_info, H5D_ALLOC_CREATE, FALSE, NULL) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize storage")
-    }
+    } /* end if */
+
     /* Update external storage message, if it's used */
     if(dset->shared->dcpl_cache.efl.nused > 0) {
         H5O_efl_t *efl = &dset->shared->dcpl_cache.efl; /* Dataset's external file list */
@@ -518,15 +520,15 @@ H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
             heap_size += H5HL_ALIGN(HDstrlen(efl->slot[u].name) + 1);
 
         /* Create the heap for the EFL file names */
-        if(H5HL_create(file, dxpl_id, heap_size, &efl->heap_addr/*out*/) < 0)
+        if(H5HL_create(file, heap_size, &efl->heap_addr/*out*/) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to create EFL file name heap")
 
         /* Pin the heap down in memory */
-        if(NULL == (heap = H5HL_protect(file, dxpl_id, efl->heap_addr, H5AC__NO_FLAGS_SET)))
+        if(NULL == (heap = H5HL_protect(file, efl->heap_addr, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTPROTECT, FAIL, "unable to protect EFL file name heap")
 
         /* Insert "empty" name first */
-        if(UFAIL == H5HL_insert(file, dxpl_id, heap, (size_t)1, "")) {
+        if(UFAIL == H5HL_insert(file, heap, (size_t)1, "")) {
             H5HL_unprotect(heap);
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert file name into heap")
         } /* end if */
@@ -535,7 +537,7 @@ H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
             size_t offset;      /* Offset of file name in heap */
 
             /* Insert file name into heap */
-            if(UFAIL == (offset = H5HL_insert(file, dxpl_id, heap,
+            if(UFAIL == (offset = H5HL_insert(file, heap,
                         HDstrlen(efl->slot[u].name) + 1, efl->slot[u].name))) {
                 H5HL_unprotect(heap);
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert file name into heap")
@@ -551,11 +553,10 @@ H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
         heap = NULL;
 
         /* Insert EFL message into dataset object header */
-        if(H5O_msg_append_oh(file, dxpl_id, oh, H5O_EFL_ID, H5O_MSG_FLAG_CONSTANT, 0, efl) < 0)
+        if(H5O_msg_append_oh(file, oh, H5O_EFL_ID, H5O_MSG_FLAG_CONSTANT, 0, efl) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update external file list message")
     } /* end if */
 
-    /* Create layout message */
     /* (Don't make layout message constant unless allocation time is early and non-filtered, since space may not be allocated) */
     /* (Note: this is relying on H5D__alloc_storage not calling H5O_msg_write during dataset creation) */
     if(fill_prop->alloc_time == H5D_ALLOC_TIME_EARLY && H5D_COMPACT != layout->type
@@ -563,7 +564,14 @@ H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh, H5D_t *dset,
         layout_mesg_flags = H5O_MSG_FLAG_CONSTANT;
     else
         layout_mesg_flags =  0;
-    if(H5O_msg_append_oh(file, dxpl_id, oh, H5O_LAYOUT_ID, layout_mesg_flags, 0, layout) < 0)
+
+    /* Store VDS info in global heap */
+    if(H5D_VIRTUAL == layout->type)
+        if(H5D__virtual_store_layout(file, layout) < 0)
+             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to store VDS info")
+
+    /* Create layout message */
+    if(H5O_msg_append_oh(file, oh, H5O_LAYOUT_ID, layout_mesg_flags, 0, layout) < 0)
          HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to update layout")
 
 done:
@@ -571,10 +579,10 @@ done:
     if(ret_value < 0)
         if(layout_init)
             /* Destroy any cached layout information for the dataset */
-            if(dset->shared->layout.ops->dest && (dset->shared->layout.ops->dest)(dset, dxpl_id) < 0)
+            if(dset->shared->layout.ops->dest && (dset->shared->layout.ops->dest)(dset) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "unable to destroy layout info")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5D__layout_oh_create() */
 
 
@@ -592,9 +600,10 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__layout_oh_read(H5D_t *dataset, hid_t dxpl_id, hid_t dapl_id, H5P_genplist_t *plist)
+H5D__layout_oh_read(H5D_t *dataset, hid_t dapl_id, H5P_genplist_t *plist)
 {
     htri_t msg_exists;                  /* Whether a particular type of message exists */
+    hbool_t layout_copied = FALSE;      /* Flag to indicate that layout message was copied */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -604,11 +613,11 @@ H5D__layout_oh_read(H5D_t *dataset, hid_t dxpl_id, hid_t dapl_id, H5P_genplist_t
     HDassert(plist);
 
     /* Get the optional filters message */
-    if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_PLINE_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_PLINE_ID)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't check if message exists")
     if(msg_exists) {
         /* Retrieve the I/O pipeline message */
-        if(NULL == H5O_msg_read(&(dataset->oloc), H5O_PLINE_ID, &dataset->shared->dcpl_cache.pline, dxpl_id))
+        if(NULL == H5O_msg_read(&(dataset->oloc), H5O_PLINE_ID, &dataset->shared->dcpl_cache.pline))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve message")
 
         /* Set the I/O pipeline info in the property list */
@@ -622,15 +631,16 @@ H5D__layout_oh_read(H5D_t *dataset, hid_t dxpl_id, hid_t dapl_id, H5P_genplist_t
      * values are copied to the dataset create plist so the user can query
      * them.
      */
-    if(NULL == H5O_msg_read(&(dataset->oloc), H5O_LAYOUT_ID, &(dataset->shared->layout), dxpl_id))
+    if(NULL == H5O_msg_read(&(dataset->oloc), H5O_LAYOUT_ID, &(dataset->shared->layout)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to read data layout message")
+    layout_copied = TRUE;
 
     /* Check for external file list message (which might not exist) */
-    if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_EFL_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(dataset->oloc), H5O_EFL_ID)) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't check if message exists")
     if(msg_exists) {
         /* Retrieve the EFL  message */
-        if(NULL == H5O_msg_read(&(dataset->oloc), H5O_EFL_ID, &dataset->shared->dcpl_cache.efl, dxpl_id))
+        if(NULL == H5O_msg_read(&(dataset->oloc), H5O_EFL_ID, &dataset->shared->dcpl_cache.efl))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve message")
 
         /* Set the EFL info in the property list */
@@ -645,7 +655,7 @@ H5D__layout_oh_read(H5D_t *dataset, hid_t dxpl_id, hid_t dapl_id, H5P_genplist_t
     HDassert(dataset->shared->layout.ops);
 
     /* Initialize the layout information for the dataset */
-    if(dataset->shared->layout.ops->init && (dataset->shared->layout.ops->init)(dataset->oloc.file, dxpl_id, dataset, dapl_id) < 0)
+    if(dataset->shared->layout.ops->init && (dataset->shared->layout.ops->init)(dataset->oloc.file, dataset, dapl_id) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize layout information")
 
     /* Adjust chunk dimensions to omit datatype size (in last dimension) for creation property */
@@ -657,10 +667,15 @@ H5D__layout_oh_read(H5D_t *dataset, hid_t dxpl_id, hid_t dapl_id, H5P_genplist_t
         HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set layout")
 
     /* Set chunk sizes */
-    if(H5D__chunk_set_sizes(dataset) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "unable to set chunk sizes")
+    if(H5D_CHUNKED == dataset->shared->layout.type)
+        if(H5D__chunk_set_sizes(dataset) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "unable to set chunk sizes")
 
 done:
+    if(ret_value < 0 && layout_copied)
+        if(H5O_msg_reset(H5O_LAYOUT_ID, &dataset->shared->layout) < 0)
+            HDONE_ERROR(H5E_DATASET, H5E_CANTRESET, FAIL, "unable to reset layout info")
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__layout_oh_read() */
 
@@ -679,7 +694,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__layout_oh_write(H5D_t *dataset, hid_t dxpl_id, H5O_t *oh, unsigned update_flags)
+H5D__layout_oh_write(const H5D_t *dataset, H5O_t *oh, unsigned update_flags)
 {
     htri_t msg_exists;                  /* Whether the layout message exists */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -695,7 +710,7 @@ H5D__layout_oh_write(H5D_t *dataset, hid_t dxpl_id, H5O_t *oh, unsigned update_f
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "unable to check if layout message exists")
     if(msg_exists) {
         /* Write the layout message to the dataset's header */
-        if(H5O_msg_write_oh(dataset->oloc.file, dxpl_id, oh, H5O_LAYOUT_ID, 0, update_flags, &dataset->shared->layout) < 0)
+        if(H5O_msg_write_oh(dataset->oloc.file, oh, H5O_LAYOUT_ID, 0, update_flags, &dataset->shared->layout) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to update layout message")
     } /* end if */
 
diff --git a/src/H5Dmodule.h b/src/H5Dmodule.h
index 9b0c411..b259b69 100644
--- a/src/H5Dmodule.h
+++ b/src/H5Dmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Dmpio.c b/src/H5Dmpio.c
index 97b4fae..107b751 100644
--- a/src/H5Dmpio.c
+++ b/src/H5Dmpio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -34,16 +32,18 @@
 /* Headers */
 /***********/
 #include "H5private.h"        /* Generic Functions */
+#include "H5CXprivate.h"      /* API Contexts      */
 #include "H5Dpkg.h"           /* Datasets          */
 #include "H5Eprivate.h"       /* Error handling    */
 #include "H5Fprivate.h"       /* File access       */
 #include "H5FDprivate.h"      /* File drivers      */
+#include "H5FDmpi.h"          /* MPI-based file drivers	*/
 #include "H5Iprivate.h"       /* IDs               */
 #include "H5MMprivate.h"      /* Memory management */
 #include "H5Oprivate.h"       /* Object headers    */
 #include "H5Pprivate.h"       /* Property lists    */
 #include "H5Sprivate.h"       /* Dataspaces        */
-#include "H5VMprivate.h"       /* Vector            */
+#include "H5VMprivate.h"      /* Vector            */
 
 #ifdef H5_HAVE_PARALLEL
 
@@ -78,13 +78,10 @@
 */
 
 /* Macros to represent different IO modes(NONE, Independent or collective)for multiple chunk IO case */
-#define H5D_CHUNK_IO_MODE_IND         0
 #define H5D_CHUNK_IO_MODE_COL         1
 
 /* Macros to represent the regularity of the selection for multiple chunk IO case. */
 #define H5D_CHUNK_SELECT_REG          1
-#define H5D_CHUNK_SELECT_IRREG        2
-#define H5D_CHUNK_SELECT_NONE         0
 
 
 /******************/
@@ -96,6 +93,113 @@ typedef struct H5D_chunk_addr_info_t {
   H5D_chunk_info_t chunk_info;
 } H5D_chunk_addr_info_t;
 
+/*
+ * Information about a single chunk when performing collective filtered I/O. All
+ * of the fields of one of these structs are initialized at the start of collective
+ * filtered I/O in the function H5D__construct_filtered_io_info_list().
+ *
+ * This struct's fields are as follows:
+ *
+ *   index - The "Index" of the chunk in the dataset. The index of a chunk is used during
+ *           the collective re-insertion of chunks into the chunk index after the collective
+ *           I/O has been performed.
+ *
+ *   scaled - The scaled coordinates of the chunk in the dataset's file dataspace. The
+ *            coordinates are used in both the collective re-allocation of space in the file
+ *            and the collective re-insertion of chunks into the chunk index after the collective
+ *            I/O has been performed.
+ *
+ *   full_overwrite - A flag which determines whether or not a chunk needs to be read from the
+ *                    file when being updated. If a chunk is being fully overwritten (the entire
+ *                    extent is selected in its file dataspace), then it is not necessary to
+ *                    read the chunk from the file. However, if the chunk is not being fully
+ *                    overwritten, it has to be read from the file in order to update the chunk
+ *                    without trashing the parts of the chunk that are not selected.
+ *
+ *   num_writers - The total number of processors writing to this chunk. This field is used
+ *                 when the new owner of a chunk is receiving messages, which contain selections in
+ *                 the chunk and data to update the chunk with, from other processors which have this
+ *                 chunk selected in the I/O operation. The new owner must know how many processors it
+ *                 should expect messages from so that it can post an equal number of receive calls.
+ *
+ *   io_size - The total size of I/O to this chunk. This field is an accumulation of the size of
+ *             I/O to the chunk from each processor which has the chunk selected and is used to
+ *             determine the value for the previous full_overwrite flag.
+ *
+ *   buf - A pointer which serves the dual purpose of holding either the chunk data which is to be
+ *         written to the file or the chunk data which has been read from the file.
+ *
+ *   chunk_states - In the case of dataset writes only, this struct is used to track a chunk's size and
+ *                  address in the file before and after the filtering operation has occurred.
+ *
+ *                  Its fields are as follows:
+ *
+ *                  chunk_current - The address in the file and size of this chunk before the filtering
+ *                                  operation. When reading a chunk from the file, this field is used to
+ *                                  read the correct amount of bytes. It is also used when redistributing
+ *                                  shared chunks among processors and as a parameter to the chunk file
+ *                                  space reallocation function.
+ *
+ *                  new_chunk - The address in the file and size of this chunk after the filtering
+ *                              operation. This field is relevant when collectively re-allocating space
+ *                              in the file for all of the chunks written to in the I/O operation, as
+ *                              their sizes may have changed after their data has been filtered.
+ *
+ *   owners - In the case of dataset writes only, this struct is used to manage which single processor
+ *            will ultimately write data out to the chunk. It allows the other processors to act according
+ *            to the decision and send their selection in the chunk, as well as the data they wish
+ *            to update the chunk with, to the processor which is writing to the chunk.
+ *
+ *            Its fields are as follows:
+ *
+ *            original_owner - The processor which originally had this chunk selected at the beginning of
+ *                             the collective filtered I/O operation. This field is currently used when
+ *                             redistributing shared chunks among processors.
+ *
+ *            new_owner - The processor which has been selected to perform the write to this chunk.
+ *
+ *   async_info - In the case of dataset writes only, this struct is used by the owning processor of the
+ *                chunk in order to manage the MPI send and receive calls made between it and all of
+ *                the other processors which have this chunk selected in the I/O operation.
+ *
+ *                Its fields are as follows:
+ *
+ *                receive_requests_array - An array containing one MPI_Request for each of the
+ *                                         asynchronous MPI receive calls the owning processor of this
+ *                                         chunk makes to another processor in order to receive that
+ *                                         processor's chunk modification data and selection in the chunk.
+ *
+ *                receive_buffer_array - An array of buffers into which the owning processor of this chunk
+ *                                       will store chunk modification data and the selection in the chunk
+ *                                       received from another processor.
+ *
+ *                num_receive_requests - The number of entries in the receive_request_array and
+ *                                       receive_buffer_array fields.
+ */
+typedef struct H5D_filtered_collective_io_info_t {
+  hsize_t             index;
+  hsize_t             scaled[H5O_LAYOUT_NDIMS];
+  hbool_t             full_overwrite;
+  size_t              num_writers;
+  size_t              io_size;
+  void               *buf;
+
+  struct {
+      H5F_block_t     chunk_current;
+      H5F_block_t     new_chunk;
+  } chunk_states;
+
+  struct {
+      int             original_owner;
+      int             new_owner;
+  } owners;
+
+  struct {
+      MPI_Request    *receive_requests_array;
+      unsigned char **receive_buffer_array;
+      int             num_receive_requests;
+  } async_info;
+} H5D_filtered_collective_io_info_t;
 
 /********************/
 /* Local Prototypes */
@@ -103,29 +207,45 @@ typedef struct H5D_chunk_addr_info_t {
 static herr_t H5D__chunk_collective_io(H5D_io_info_t *io_info,
     const H5D_type_info_t *type_info, H5D_chunk_map_t *fm);
 static herr_t H5D__multi_chunk_collective_io(H5D_io_info_t *io_info,
-    const H5D_type_info_t *type_info, H5D_chunk_map_t *fm,
-    H5P_genplist_t *dx_plist);
+    const H5D_type_info_t *type_info, H5D_chunk_map_t *fm);
+static herr_t H5D__multi_chunk_filtered_collective_io(H5D_io_info_t *io_info,
+    const H5D_type_info_t *type_info, H5D_chunk_map_t *fm);
 static herr_t H5D__link_chunk_collective_io(H5D_io_info_t *io_info,
-    const H5D_type_info_t *type_info, H5D_chunk_map_t *fm, int sum_chunk,
-    H5P_genplist_t *dx_plist);
+    const H5D_type_info_t *type_info, H5D_chunk_map_t *fm, int sum_chunk);
+static herr_t H5D__link_chunk_filtered_collective_io(H5D_io_info_t *io_info,
+    const H5D_type_info_t *type_info, H5D_chunk_map_t *fm);
 static herr_t H5D__inter_collective_io(H5D_io_info_t *io_info,
     const H5D_type_info_t *type_info, const H5S_t *file_space,
     const H5S_t *mem_space);
 static herr_t H5D__final_collective_io(H5D_io_info_t *io_info,
-    const H5D_type_info_t *type_info, hsize_t nelmts, MPI_Datatype *mpi_file_type,
-    MPI_Datatype *mpi_buf_type);
+    const H5D_type_info_t *type_info, hsize_t nelmts, MPI_Datatype mpi_file_type,
+    MPI_Datatype mpi_buf_type);
 static herr_t H5D__sort_chunk(H5D_io_info_t *io_info, const H5D_chunk_map_t *fm,
     H5D_chunk_addr_info_t chunk_addr_info_array[], int many_chunk_opt);
 static herr_t H5D__obtain_mpio_mode(H5D_io_info_t *io_info, H5D_chunk_map_t *fm,
-    H5P_genplist_t *dx_plist, uint8_t assign_io_mode[], haddr_t chunk_addr[]);
-static herr_t H5D__ioinfo_xfer_mode(H5D_io_info_t *io_info, H5P_genplist_t *dx_plist,
-    H5FD_mpio_xfer_t xfer_mode);
-static herr_t H5D__ioinfo_coll_opt_mode(H5D_io_info_t *io_info, H5P_genplist_t *dx_plist,
-    H5FD_mpio_collective_opt_t coll_opt_mode);
-static herr_t H5D__mpio_get_min_chunk(const H5D_io_info_t *io_info,
-    const H5D_chunk_map_t *fm, int *min_chunkf);
+    uint8_t assign_io_mode[], haddr_t chunk_addr[]);
 static herr_t H5D__mpio_get_sum_chunk(const H5D_io_info_t *io_info,
     const H5D_chunk_map_t *fm, int *sum_chunkf);
+static herr_t H5D__construct_filtered_io_info_list(const H5D_io_info_t *io_info,
+    const H5D_type_info_t *type_info, const H5D_chunk_map_t *fm,
+    H5D_filtered_collective_io_info_t **chunk_list, size_t *num_entries);
+static herr_t H5D__chunk_redistribute_shared_chunks(const H5D_io_info_t *io_info,
+    const H5D_type_info_t *type_info, const H5D_chunk_map_t *fm,
+    H5D_filtered_collective_io_info_t *local_chunk_array, size_t *local_chunk_array_num_entries);
+static herr_t H5D__mpio_array_gatherv(void *local_array, size_t local_array_num_entries,
+    size_t array_entry_size, void **gathered_array, size_t *gathered_array_num_entries,
+    int nprocs, hbool_t allgather, int root, MPI_Comm comm, int (*sort_func)(const void *, const void *));
+static herr_t H5D__mpio_filtered_collective_write_type(
+    H5D_filtered_collective_io_info_t *chunk_list, size_t num_entries,
+    MPI_Datatype *new_mem_type, hbool_t *mem_type_derived,
+    MPI_Datatype *new_file_type, hbool_t *file_type_derived);
+static herr_t H5D__filtered_collective_chunk_entry_io(H5D_filtered_collective_io_info_t *chunk_entry,
+    const H5D_io_info_t *io_info, const H5D_type_info_t *type_info, const H5D_chunk_map_t *fm);
+static int H5D__cmp_chunk_addr(const void *chunk_addr_info1, const void *chunk_addr_info2);
+static int H5D__cmp_filtered_collective_io_info_entry(const void *filtered_collective_io_info_entry1,
+    const void *filtered_collective_io_info_entry2);
+static int H5D__cmp_filtered_collective_io_info_entry_owner(const void *filtered_collective_io_info_entry1,
+    const void *filtered_collective_io_info_entry2);
 
 
 /*********************/
@@ -144,7 +264,7 @@ static herr_t H5D__mpio_get_sum_chunk(const H5D_io_info_t *io_info,
  * Purpose:     Checks if an direct I/O transfer is possible between memory and
  *                  the file.
  *
- * Return:      Sauccess:   Non-negative: TRUE or FALSE
+ * Return:      Success:   Non-negative: TRUE or FALSE
  *              Failure:    Negative
  *
  * Programmer:  Quincey Koziol
@@ -154,12 +274,12 @@ static herr_t H5D__mpio_get_sum_chunk(const H5D_io_info_t *io_info,
  */
 htri_t
 H5D__mpio_opt_possible(const H5D_io_info_t *io_info, const H5S_t *file_space,
-    const H5S_t *mem_space, const H5D_type_info_t *type_info,
-    const H5D_chunk_map_t *fm, H5P_genplist_t *dx_plist)
+    const H5S_t *mem_space, const H5D_type_info_t *type_info)
 {
-    int local_cause = 0;        /* Local reason(s) for breaking collective mode */
-    int global_cause = 0;       /* Global reason(s) for breaking collective mode */
-    htri_t ret_value;           /* Return value */
+    H5FD_mpio_xfer_t io_xfer_mode;      /* MPI I/O transfer mode */
+    unsigned local_cause = 0;                /* Local reason(s) for breaking collective mode */
+    unsigned global_cause = 0;               /* Global reason(s) for breaking collective mode */
+    htri_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
@@ -171,7 +291,9 @@ H5D__mpio_opt_possible(const H5D_io_info_t *io_info, const H5S_t *file_space,
 
 
     /* For independent I/O, get out quickly and don't try to form consensus */
-    if(io_info->dxpl_cache->xfer_mode == H5FD_MPIO_INDEPENDENT)
+    if(H5CX_get_io_xfer_mode(&io_xfer_mode) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
+    if(io_xfer_mode == H5FD_MPIO_INDEPENDENT)
         local_cause |= H5D_MPIO_SET_INDEPENDENT;
 
     /* Optimized MPI types flag must be set */
@@ -208,11 +330,6 @@ H5D__mpio_opt_possible(const H5D_io_info_t *io_info, const H5S_t *file_space,
      *  use collective IO will defer until each chunk IO is reached.
      */
 
-    /* Don't allow collective operations if filters need to be applied */
-    if(io_info->dset->shared->layout.type == H5D_CHUNKED &&
-            io_info->dset->shared->dcpl_cache.pline.nused > 0)
-        local_cause |= H5D_MPIO_FILTERS;
-
     /* Check for independent I/O */
     if(local_cause & H5D_MPIO_SET_INDEPENDENT)
         global_cause = local_cause;
@@ -222,17 +339,13 @@ H5D__mpio_opt_possible(const H5D_io_info_t *io_info, const H5S_t *file_space,
         /* Form consensus opinion among all processes about whether to perform
          * collective I/O
          */
-        if(MPI_SUCCESS != (mpi_code = MPI_Allreduce(&local_cause, &global_cause, 1, MPI_INT, MPI_BOR, io_info->comm)))
+        if(MPI_SUCCESS != (mpi_code = MPI_Allreduce(&local_cause, &global_cause, 1, MPI_UNSIGNED, MPI_BOR, io_info->comm)))
             HMPI_GOTO_ERROR(FAIL, "MPI_Allreduce failed", mpi_code)
     } /* end else */
 
-    /* Write the local value of no-collective-cause to the DXPL. */
-    if(H5P_set(dx_plist, H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME, &local_cause) < 0)
-       HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set local no collective cause property")
-
-    /* Write the global value of no-collective-cause to the DXPL. */
-    if(H5P_set(dx_plist, H5D_MPIO_GLOBAL_NO_COLLECTIVE_CAUSE_NAME, &global_cause) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set global no collective cause property")
+    /* Set the local & global values of no-collective-cause in the API context */
+    H5CX_set_mpio_local_no_coll_cause(local_cause);
+    H5CX_set_mpio_global_no_coll_cause(global_cause);
 
     /* Set the return value, based on the global cause */
     ret_value = global_cause > 0 ? FALSE : TRUE;
@@ -263,7 +376,7 @@ H5D__mpio_select_read(const H5D_io_info_t *io_info, const H5D_type_info_t H5_ATT
     FUNC_ENTER_PACKAGE
 
     H5_CHECK_OVERFLOW(mpi_buf_count, hsize_t, size_t);
-    if(H5F_block_read(io_info->dset->oloc.file, H5FD_MEM_DRAW, store_contig->dset_addr, (size_t)mpi_buf_count, io_info->raw_dxpl_id, io_info->u.rbuf) < 0)
+    if(H5F_block_read(io_info->dset->oloc.file, H5FD_MEM_DRAW, store_contig->dset_addr, (size_t)mpi_buf_count, io_info->u.rbuf) < 0)
         HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "can't finish collective parallel read")
 
 done:
@@ -293,7 +406,7 @@ H5D__mpio_select_write(const H5D_io_info_t *io_info, const H5D_type_info_t H5_AT
 
     /*OKAY: CAST DISCARDS CONST QUALIFIER*/
     H5_CHECK_OVERFLOW(mpi_buf_count, hsize_t, size_t);
-    if(H5F_block_write(io_info->dset->oloc.file, H5FD_MEM_DRAW, store_contig->dset_addr, (size_t)mpi_buf_count, io_info->raw_dxpl_id, io_info->u.wbuf) < 0)
+    if(H5F_block_write(io_info->dset->oloc.file, H5FD_MEM_DRAW, store_contig->dset_addr, (size_t)mpi_buf_count, io_info->u.wbuf) < 0)
        HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "can't finish collective parallel write")
 
 done:
@@ -302,113 +415,110 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5D__ioinfo_xfer_mode
+ * Function:    H5D__mpio_array_gatherv
+ *
+ * Purpose:     Given an array, specified in local_array, by each processor
+ *              calling this function, gathers each array into a single
+ *              array which is then either gathered to the processor
+ *              specified by root, when allgather is false, or is
+ *              distributed back to all processors when allgather is true.
+ *
+ *              The size of each entry and number of entries in the array
+ *              contributed by an individual processor should be specified
+ *              in array_entry_size and local_array_num_entries,
+ *              respectively.
  *
- * Purpose:     Switch to between collective & independent MPI I/O
+ *              The number of processors participating in the gather
+ *              operation should be specified for nprocs.
+ *
+ *              The MPI communicator to use should be specified for comm.
+ *
+ *              If the sort_func argument is supplied, the array is sorted
+ *              before the function returns.
+ *
+ *              Note: if allgather is specified as true, root is ignored.
  *
  * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:  Quincey Koziol
- *              Friday, August 12, 2005
+ * Programmer:  Jordan Henderson
+ *              Sunday, April 9th, 2017
  *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__ioinfo_xfer_mode(H5D_io_info_t *io_info, H5P_genplist_t *dx_plist,
-    H5FD_mpio_xfer_t xfer_mode)
+H5D__mpio_array_gatherv(void *local_array, size_t local_array_num_entries,
+    size_t array_entry_size, void **_gathered_array, size_t *_gathered_array_num_entries,
+    int nprocs, hbool_t allgather, int root, MPI_Comm comm, int (*sort_func)(const void *, const void *))
 {
-    herr_t  ret_value = SUCCEED;    /* return value */
+    size_t  gathered_array_num_entries = 0; /* The size of the newly-constructed array */
+    size_t  i;
+    void   *gathered_array = NULL;          /* The newly-constructed array returned to the caller */
+    int    *receive_counts_array = NULL;    /* Array containing number of entries each process is contributing */
+    int    *displacements_array = NULL;     /* Array of displacements where each process places its data in the final array */
+    int     mpi_code;
+    int     sendcount;
+    herr_t  ret_value = SUCCEED;
 
     FUNC_ENTER_STATIC
 
-    /* Change the xfer_mode */
-    io_info->dxpl_cache->xfer_mode = xfer_mode;
-    if(H5P_set(dx_plist, H5D_XFER_IO_XFER_MODE_NAME, &io_info->dxpl_cache->xfer_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set transfer mode")
+    HDassert(_gathered_array);
+    HDassert(_gathered_array_num_entries);
 
-    /* Change the "single I/O" function pointers */
-    if(xfer_mode == H5FD_MPIO_INDEPENDENT) {
-        /* Set the pointers to the original, non-MPI-specific routines */
-        io_info->io_ops.single_read = io_info->orig.io_ops.single_read;
-        io_info->io_ops.single_write = io_info->orig.io_ops.single_write;
-    } /* end if */
-    else {
-        HDassert(xfer_mode == H5FD_MPIO_COLLECTIVE);
+    /* Determine the size of the end result array */
+    if (MPI_SUCCESS != (mpi_code = MPI_Allreduce(&local_array_num_entries, &gathered_array_num_entries, 1, MPI_INT, MPI_SUM, comm)))
+        HMPI_GOTO_ERROR(FAIL, "MPI_Allreduce failed", mpi_code)
 
-        /* Set the pointers to the MPI-specific routines */
-        io_info->io_ops.single_read = H5D__mpio_select_read;
-        io_info->io_ops.single_write = H5D__mpio_select_write;
-    } /* end else */
+    /* If 0 entries resulted from the collective operation, no one is writing anything */
+    if (gathered_array_num_entries > 0) {
+        if (NULL == (gathered_array = H5MM_malloc(gathered_array_num_entries * array_entry_size)))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate gathered array")
 
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D__ioinfo_xfer_mode() */
+        if (NULL == (receive_counts_array = (int *) H5MM_malloc((size_t) nprocs * sizeof(int))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate receive counts array")
 
-
-/*-------------------------------------------------------------------------
- * Function:    H5D__ioinfo_coll_opt_mode
- *
- * Purpose:     Switch between using collective & independent MPI I/O w/file
- *              set view
- *
- * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  MuQun Yang
- *              Oct. 5th, 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5D__ioinfo_coll_opt_mode(H5D_io_info_t *io_info, H5P_genplist_t *dx_plist,
-    H5FD_mpio_collective_opt_t coll_opt_mode)
-{
-    herr_t  ret_value = SUCCEED;    /* return value */
+        if (NULL == (displacements_array = (int *) H5MM_malloc((size_t) nprocs * sizeof(int))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate receive displacements array")
 
-    FUNC_ENTER_STATIC
+        /* Inform each process of how many entries each other process is contributing to the resulting array */
+        if (MPI_SUCCESS != (mpi_code = MPI_Allgather(&local_array_num_entries, 1, MPI_INT, receive_counts_array, 1, MPI_INT, comm)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Allgather failed", mpi_code)
 
-    /* Change the optimal xfer_mode */
-    io_info->dxpl_cache->coll_opt_mode = coll_opt_mode;
-    if(H5P_set(dx_plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, &io_info->dxpl_cache->coll_opt_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set transfer mode")
+        /* Multiply each receive count by the size of the array entry, since the data is sent as bytes */
+        for (i = 0; i < (size_t) nprocs; i++)
+            H5_CHECKED_ASSIGN(receive_counts_array[i], int, (size_t) receive_counts_array[i] * array_entry_size, size_t);
 
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D__ioinfo_coll_opt_mode() */
+        /* Set receive buffer offsets for MPI_Allgatherv */
+        displacements_array[0] = 0;
+        for (i = 1; i < (size_t) nprocs; i++)
+            displacements_array[i] = displacements_array[i - 1] + receive_counts_array[i - 1];
 
-
-/*-------------------------------------------------------------------------
- * Function:    H5D__mpio_get_min_chunk
- *
- * Purpose:     Routine for obtaining minimum number of chunks to cover
- *              hyperslab selection selected by all processors.
- *
- * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Muqun Yang
- *              Monday, Feb. 13th, 2006
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5D__mpio_get_min_chunk(const H5D_io_info_t *io_info, const H5D_chunk_map_t *fm,
-    int *min_chunkf)
-{
-    int num_chunkf;             /* Number of chunks to iterate over */
-    int mpi_code;               /* MPI return code */
-    herr_t ret_value = SUCCEED;
+        H5_CHECKED_ASSIGN(sendcount, int, local_array_num_entries * array_entry_size, size_t);
 
-    FUNC_ENTER_STATIC
+        if (allgather) {
+            if (MPI_SUCCESS != (mpi_code = MPI_Allgatherv(local_array, sendcount, MPI_BYTE,
+                    gathered_array, receive_counts_array, displacements_array, MPI_BYTE, comm)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Allgatherv failed", mpi_code)
+        } /* end if */
+        else {
+            if (MPI_SUCCESS != (mpi_code = MPI_Gatherv(local_array, sendcount, MPI_BYTE,
+                    gathered_array, receive_counts_array, displacements_array, MPI_BYTE, root, comm)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Allgatherv failed", mpi_code)
+        } /* end else */
 
-    /* Get the number of chunks to perform I/O on */
-    num_chunkf = H5SL_count(fm->sel_chunks);
+        if (sort_func) HDqsort(gathered_array, gathered_array_num_entries, array_entry_size, sort_func);
+    } /* end if */
 
-    /* Determine the minimum # of chunks for all processes */
-    if(MPI_SUCCESS != (mpi_code = MPI_Allreduce(&num_chunkf, min_chunkf, 1, MPI_INT, MPI_MIN, io_info->comm)))
-        HMPI_GOTO_ERROR(FAIL, "MPI_Allreduce failed", mpi_code)
+    *_gathered_array = gathered_array;
+    *_gathered_array_num_entries = gathered_array_num_entries;
 
 done:
+    if (receive_counts_array)
+        H5MM_free(receive_counts_array);
+    if (displacements_array)
+        H5MM_free(displacements_array);
+
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5D__mpio_get_min_chunk() */
+} /* end H5D__mpio_array_gatherv() */
 
 
 /*-------------------------------------------------------------------------
@@ -468,28 +578,21 @@ H5D__contig_collective_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_
     H5D_chunk_map_t H5_ATTR_UNUSED *fm)
 {
     H5D_mpio_actual_io_mode_t actual_io_mode = H5D_MPIO_CONTIGUOUS_COLLECTIVE;
-    H5P_genplist_t *dx_plist;           /* Pointer to DXPL */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(H5FD_MPIO == H5F_DRIVER_ID(io_info->dset->oloc.file));
-    HDassert(TRUE == H5P_isa_class(io_info->raw_dxpl_id, H5P_DATASET_XFER));
 
     /* Call generic internal collective I/O routine */
     if(H5D__inter_collective_io(io_info, type_info, file_space, mem_space) < 0)
         HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "couldn't finish shared collective MPI-IO")
 
-    /* Obtain the data transfer properties */
-    if(NULL == (dx_plist = H5I_object(io_info->raw_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data transfer property list")
-
     /* Set the actual I/O mode property. internal_collective_io will not break to
      * independent I/O, so we set it here.
      */
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property")
+    H5CX_set_mpio_actual_io_mode(actual_io_mode);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -515,28 +618,21 @@ H5D__contig_collective_write(H5D_io_info_t *io_info, const H5D_type_info_t *type
     H5D_chunk_map_t H5_ATTR_UNUSED *fm)
 {
     H5D_mpio_actual_io_mode_t actual_io_mode = H5D_MPIO_CONTIGUOUS_COLLECTIVE;
-    H5P_genplist_t *dx_plist;           /* Pointer to DXPL */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(H5FD_MPIO == H5F_DRIVER_ID(io_info->dset->oloc.file));
-    HDassert(TRUE == H5P_isa_class(io_info->raw_dxpl_id, H5P_DATASET_XFER));
 
     /* Call generic internal collective I/O routine */
     if(H5D__inter_collective_io(io_info, type_info, file_space, mem_space) < 0)
         HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "couldn't finish shared collective MPI-IO")
 
-    /* Obtain the data transfer properties */
-    if(NULL == (dx_plist = H5I_object(io_info->raw_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data transfer property list")
-
     /* Set the actual I/O mode property. internal_collective_io will not break to
      * independent I/O, so we set it here.
      */
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property")
+    H5CX_set_mpio_actual_io_mode(actual_io_mode);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -583,7 +679,6 @@ static herr_t
 H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     H5D_chunk_map_t *fm)
 {
-    H5P_genplist_t *dx_plist;           /* Pointer to DXPL */
     H5FD_mpio_chunk_opt_t chunk_opt_mode;
     int         io_option = H5D_MULTI_CHUNK_IO_MORE_OPT;
     int         sum_chunk = -1;
@@ -600,13 +695,10 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf
     HDassert(type_info);
     HDassert(fm);
 
-    /* Obtain the data transfer properties */
-    if(NULL == (dx_plist = H5I_object(io_info->raw_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
+    /* Check the optional property list for the collective chunk IO optimization option */
+    if(H5CX_get_mpio_chunk_opt_mode(&chunk_opt_mode) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "couldn't get chunk optimization option")
 
-    /* Check the optional property list on what to do with collective chunk IO. */
-    if(H5P_get(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_HARD_NAME, &chunk_opt_mode) < 0)
-        HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't get chunk optimization option")
     if(H5FD_MPIO_CHUNK_ONE_IO == chunk_opt_mode)
         io_option = H5D_ONE_LINK_CHUNK_IO;      /*no opt*/
     /* direct request to multi-chunk-io */
@@ -622,80 +714,80 @@ H5D__chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_inf
         if((mpi_size = H5F_mpi_get_size(io_info->dset->oloc.file)) < 0)
             HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi size")
 
-        /* Get the chunk optimization option */
-        if(H5P_get(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_NUM_NAME, &one_link_chunk_io_threshold) < 0)
-            HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't get chunk optimization option")
+        /* Get the chunk optimization option threshold */
+        if(H5CX_get_mpio_chunk_opt_num(&one_link_chunk_io_threshold) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "couldn't get chunk optimization option threshold value")
 
         /* step 1: choose an IO option */
         /* If the average number of chunk per process is greater than a threshold, we will do one link chunked IO. */
-        if((unsigned)sum_chunk / mpi_size >= one_link_chunk_io_threshold)
+        if((unsigned)sum_chunk / (unsigned)mpi_size >= one_link_chunk_io_threshold)
             io_option = H5D_ONE_LINK_CHUNK_IO_MORE_OPT;
 #ifdef H5_HAVE_INSTRUMENTED_LIBRARY
         else
             temp_not_link_io = TRUE;
-#endif
+#endif /* H5_HAVE_INSTRUMENTED_LIBRARY */
     } /* end else */
 
 #ifdef H5_HAVE_INSTRUMENTED_LIBRARY
 {
-    H5P_genplist_t    *plist;           /* Property list pointer */
-    htri_t            check_prop;
-    int               new_value;
-
-    /* Get the dataset transfer property list */
-    if(NULL == (plist = (H5P_genplist_t *)H5I_object(io_info->raw_dxpl_id)))
-        HGOTO_ERROR(H5E_IO, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
-    /*** Test collective chunk user-input optimization APIs. ***/
-    check_prop = H5P_exist_plist(plist, H5D_XFER_COLL_CHUNK_LINK_HARD_NAME);
-    if(check_prop > 0) {
-        if(H5D_ONE_LINK_CHUNK_IO == io_option) {
-            new_value = 0;
-            if(H5P_set(plist, H5D_XFER_COLL_CHUNK_LINK_HARD_NAME, &new_value) < 0)
-                HGOTO_ERROR(H5E_IO, H5E_CANTSET, FAIL, "unable to set property value")
-        } /* end if */
+    /*** Set collective chunk user-input optimization APIs. ***/
+    if(H5D_ONE_LINK_CHUNK_IO == io_option) {
+        if(H5CX_test_set_mpio_coll_chunk_link_hard(0) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set property value")
     } /* end if */
-    check_prop = H5P_exist_plist(plist, H5D_XFER_COLL_CHUNK_MULTI_HARD_NAME);
-    if(check_prop > 0) {
-        if(H5D_MULTI_CHUNK_IO == io_option) {
-            new_value = 0;
-            if(H5P_set(plist, H5D_XFER_COLL_CHUNK_MULTI_HARD_NAME, &new_value) < 0)
-                HGOTO_ERROR(H5E_IO, H5E_CANTSET, FAIL, "unable to set property value")
-        } /* end if */
+    else if(H5D_MULTI_CHUNK_IO == io_option) {
+        if(H5CX_test_set_mpio_coll_chunk_multi_hard(0) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set property value")
+    } /* end else-if */
+    else if(H5D_ONE_LINK_CHUNK_IO_MORE_OPT == io_option) {
+        if(H5CX_test_set_mpio_coll_chunk_link_num_true(0) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set property value")
     } /* end if */
-    check_prop = H5P_exist_plist(plist, H5D_XFER_COLL_CHUNK_LINK_NUM_TRUE_NAME);
-    if(check_prop > 0) {
-        if(H5D_ONE_LINK_CHUNK_IO_MORE_OPT == io_option) {
-            new_value = 0;
-            if(H5P_set(plist, H5D_XFER_COLL_CHUNK_LINK_NUM_TRUE_NAME, &new_value) < 0)
-                HGOTO_ERROR(H5E_IO, H5E_CANTSET, FAIL, "unable to set property value")
-        } /* end if */
-    } /* end if */
-    check_prop = H5P_exist_plist(plist, H5D_XFER_COLL_CHUNK_LINK_NUM_FALSE_NAME);
-    if(check_prop > 0) {
-        if(temp_not_link_io) {
-            new_value = 0;
-            if(H5P_set(plist, H5D_XFER_COLL_CHUNK_LINK_NUM_FALSE_NAME, &new_value) < 0)
-                HGOTO_ERROR(H5E_IO, H5E_CANTSET, FAIL, "unable to set property value")
-        } /* end if */
+    else if(temp_not_link_io) {
+        if(H5CX_test_set_mpio_coll_chunk_link_num_false(0) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set property value")
     } /* end if */
 }
-#endif
+#endif /* H5_HAVE_INSTRUMENTED_LIBRARY */
 
     /* step 2:  Go ahead to do IO.*/
-    if(H5D_ONE_LINK_CHUNK_IO == io_option || H5D_ONE_LINK_CHUNK_IO_MORE_OPT == io_option) {
-        if(H5D__link_chunk_collective_io(io_info, type_info, fm, sum_chunk, dx_plist) < 0)
-            HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish linked chunk MPI-IO")
-    } /* end if */
-    /* direct request to multi-chunk-io */
-    else if(H5D_MULTI_CHUNK_IO == io_option) {
-        if(H5D__multi_chunk_collective_io(io_info, type_info, fm, dx_plist) < 0)
-            HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish optimized multiple chunk MPI-IO")
-    } /* end if */
-    else { /* multiple chunk IO via threshold */
-        if(H5D__multi_chunk_collective_io(io_info, type_info, fm, dx_plist) < 0)
-            HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish optimized multiple chunk MPI-IO")
-    } /* end else */
+    switch (io_option) {
+        case H5D_ONE_LINK_CHUNK_IO:
+        case H5D_ONE_LINK_CHUNK_IO_MORE_OPT:
+            /* Check if there are any filters in the pipeline */
+            if(io_info->dset->shared->dcpl_cache.pline.nused > 0) {
+                /* For now, Multi-chunk IO must be forced for parallel filtered read,
+                 * so that data can be unfiltered as it is received. There is significant
+                 * complexity in unfiltering the data when it is read all at once into a
+                 * single buffer.
+                 */
+                if(io_info->op_type == H5D_IO_OP_READ) {
+                    if(H5D__multi_chunk_filtered_collective_io(io_info, type_info, fm) < 0)
+                        HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish optimized multiple filtered chunk MPI-IO")
+                } /* end if */
+                else
+                    if(H5D__link_chunk_filtered_collective_io(io_info, type_info, fm) < 0)
+                        HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish filtered linked chunk MPI-IO")
+            } /* end if */
+            else
+                /* Perform unfiltered link chunk collective IO */
+                if(H5D__link_chunk_collective_io(io_info, type_info, fm, sum_chunk) < 0)
+                    HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish linked chunk MPI-IO")
+            break;
+
+        case H5D_MULTI_CHUNK_IO: /* direct request to do multi-chunk IO */
+        default:                 /* multiple chunk IO via threshold */
+            /* Check if there are any filters in the pipeline */
+            if(io_info->dset->shared->dcpl_cache.pline.nused > 0) {
+                if(H5D__multi_chunk_filtered_collective_io(io_info, type_info, fm) < 0)
+                    HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish optimized multiple filtered chunk MPI-IO")
+            } /* end if */
+            else
+                /* Perform unfiltered multi chunk collective IO */
+                if(H5D__multi_chunk_collective_io(io_info, type_info, fm) < 0)
+                    HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish optimized multiple chunk MPI-IO")
+            break;
+    } /* end switch */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -779,16 +871,11 @@ done:
  * Programmer:  Muqun Yang
  *              Monday, Feb. 13th, 2006
  *
- * Modification:
- *  - Set H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME and H5D_MPIO_ACTUAL_IO_MODE_NAME
- *    dxpl in this.
- * Programmer: Jonathan Kim
- * Date: 2012-10-10
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5D__link_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
-    H5D_chunk_map_t *fm, int sum_chunk, H5P_genplist_t *dx_plist)
+    H5D_chunk_map_t *fm, int sum_chunk)
 {
     H5D_chunk_addr_info_t *chunk_addr_info_array = NULL;
     MPI_Datatype chunk_final_mtype;         /* Final memory MPI datatype for all chunks with seletion */
@@ -807,20 +894,16 @@ H5D__link_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *typ
     int                *chunk_mpi_file_counts = NULL;   /* Count of MPI file datatype for each chunk */
     int                *chunk_mpi_mem_counts = NULL;    /* Count of MPI memory datatype for each chunk */
     int                 mpi_code;           /* MPI return code */
-    H5D_mpio_actual_chunk_opt_mode_t actual_chunk_opt_mode = H5D_MPIO_LINK_CHUNK;
-    H5D_mpio_actual_io_mode_t actual_io_mode = H5D_MPIO_CHUNK_COLLECTIVE;
     herr_t              ret_value = SUCCEED;
 
     FUNC_ENTER_STATIC
 
     /* Set the actual-chunk-opt-mode property. */
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property")
+    H5CX_set_mpio_actual_chunk_opt(H5D_MPIO_LINK_CHUNK);
 
     /* Set the actual-io-mode property.
      * Link chunk I/O does not break to independent, so can set right away */
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property")
+    H5CX_set_mpio_actual_io_mode(H5D_MPIO_CHUNK_COLLECTIVE);
 
     /* Get the sum # of chunks, if not already available */
     if(sum_chunk < 0) {
@@ -863,7 +946,7 @@ H5D__link_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *typ
             mspace = chunk_info->mspace;
 
             /* Look up address of chunk */
-            if(H5D__chunk_lookup(io_info->dset, io_info->md_dxpl_id, chunk_info->scaled, &udata) < 0)
+            if(H5D__chunk_lookup(io_info->dset, chunk_info->scaled, &udata) < 0)
                 HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL, "couldn't get chunk address")
             ctg_store.contig.dset_addr = udata.chunk_block.offset;
         } /* end else */
@@ -1053,7 +1136,7 @@ if(H5DEBUG(D))
         io_info->store = &ctg_store;
 
         /* Perform final collective I/O operation */
-        if(H5D__final_collective_io(io_info, type_info, mpi_buf_count, &chunk_final_ftype, &chunk_final_mtype) < 0)
+        if(H5D__final_collective_io(io_info, type_info, mpi_buf_count, chunk_final_ftype, chunk_final_mtype) < 0)
             HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish MPI-IO")
     } /* end else */
 
@@ -1095,6 +1178,226 @@ if(H5DEBUG(D))
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5D__link_chunk_filtered_collective_io
+ *
+ * Purpose:     Routine for one collective IO with one MPI derived datatype
+ *              to link with all filtered chunks
+ *
+ *              1. Construct a list of selected chunks in the collective IO
+ *                 operation
+ *                 A. If any chunk is being written to by more than 1
+ *                    process, the process writing to the chunk which
+ *                    currently has the least amount of chunks assigned
+ *                    to it becomes the new owner (in the case of ties,
+ *                    the lowest MPI rank becomes the new owner)
+ *              2. If the operation is a write operation
+ *                 A. Loop through each chunk in the operation
+ *                    I. If this is not a full overwrite of the chunk
+ *                       a) Read the chunk from file and pass the chunk
+ *                          through the filter pipeline in reverse order
+ *                          (Unfilter the chunk)
+ *                    II. Update the chunk data with the modifications from
+ *                        the owning process
+ *                    III. Receive any modification data from other
+ *                         processes and update the chunk data with these
+ *                         modifications
+ *                    IV. Filter the chunk
+ *                 B. Contribute the modified chunks to an array gathered
+ *                    by all processes which contains the new sizes of
+ *                    every chunk modified in the collective IO operation
+ *                 C. All processes collectively re-allocate each chunk
+ *                    from the gathered array with their new sizes after
+ *                    the filter operation
+ *                 D. If this process has any chunks selected in the IO
+ *                    operation, create an MPI derived type for memory and
+ *                    file to write out the process' selected chunks to the
+ *                    file
+ *                 E. Perform the collective write
+ *                 F. All processes collectively re-insert each modified
+ *                    chunk from the gathered array into the chunk index
+ *
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Jordan Henderson
+ *              Friday, Nov. 4th, 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__link_chunk_filtered_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
+    H5D_chunk_map_t *fm)
+{
+    H5D_filtered_collective_io_info_t *chunk_list = NULL; /* The list of chunks being read/written */
+    H5D_filtered_collective_io_info_t *collective_chunk_list = NULL; /* The list of chunks used during collective operations */
+    H5D_storage_t                      ctg_store;                        /* Chunk storage information as contiguous dataset */
+    MPI_Datatype                       mem_type = MPI_BYTE;
+    MPI_Datatype                       file_type = MPI_BYTE;
+    hbool_t                            mem_type_is_derived = FALSE;
+    hbool_t                            file_type_is_derived = FALSE;
+    size_t                             chunk_list_num_entries;
+    size_t                             collective_chunk_list_num_entries;
+    size_t                            *num_chunks_selected_array = NULL; /* Array of number of chunks selected on each process */
+    size_t                             i;                                /* Local index variable */
+    int                                mpi_rank, mpi_size, mpi_code;
+    herr_t                             ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    HDassert(io_info);
+    HDassert(type_info);
+    HDassert(fm);
+
+    /* Obtain the current rank of the process and the number of processes */
+    if ((mpi_rank = H5F_mpi_get_rank(io_info->dset->oloc.file)) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi rank")
+    if ((mpi_size = H5F_mpi_get_size(io_info->dset->oloc.file)) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi size")
+
+    /* Set the actual-chunk-opt-mode property. */
+    H5CX_set_mpio_actual_chunk_opt(H5D_MPIO_LINK_CHUNK);
+
+    /* Set the actual-io-mode property.
+     * Link chunk filtered I/O does not break to independent, so can set right away
+     */
+    H5CX_set_mpio_actual_io_mode(H5D_MPIO_CHUNK_COLLECTIVE);
+
+    /* Build a list of selected chunks in the collective io operation */
+    if (H5D__construct_filtered_io_info_list(io_info, type_info, fm, &chunk_list, &chunk_list_num_entries) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "couldn't construct filtered I/O info list")
+
+    if (io_info->op_type == H5D_IO_OP_WRITE) { /* Filtered collective write */
+        H5D_chk_idx_info_t index_info;
+        H5D_chunk_ud_t     udata;
+        hsize_t            mpi_buf_count;
+
+        /* Construct chunked index info */
+        index_info.f = io_info->dset->oloc.file;
+        index_info.pline = &(io_info->dset->shared->dcpl_cache.pline);
+        index_info.layout = &(io_info->dset->shared->layout.u.chunk);
+        index_info.storage = &(io_info->dset->shared->layout.storage.u.chunk);
+
+        /* Set up chunk information for insertion to chunk index */
+        udata.common.layout = index_info.layout;
+        udata.common.storage = index_info.storage;
+        udata.filter_mask = 0;
+
+        /* Iterate through all the chunks in the collective write operation,
+         * updating each chunk with the data modifications from other processes,
+         * then re-filtering the chunk.
+         */
+        for (i = 0; i < chunk_list_num_entries; i++)
+            if (mpi_rank == chunk_list[i].owners.new_owner)
+                if (H5D__filtered_collective_chunk_entry_io(&chunk_list[i], io_info, type_info, fm) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "couldn't process chunk entry")
+
+        /* Gather the new chunk sizes to all processes for a collective reallocation
+         * of the chunks in the file.
+         */
+        if (H5D__mpio_array_gatherv(chunk_list, chunk_list_num_entries, sizeof(H5D_filtered_collective_io_info_t),
+                (void **) &collective_chunk_list, &collective_chunk_list_num_entries, mpi_size,
+                true, 0, io_info->comm, NULL) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGATHER, FAIL, "couldn't gather new chunk sizes")
+
+        /* Collectively re-allocate the modified chunks (from each process) in the file */
+        for (i = 0; i < collective_chunk_list_num_entries; i++) {
+            hbool_t insert;
+
+            if (H5D__chunk_file_alloc(&index_info, &collective_chunk_list[i].chunk_states.chunk_current,
+                    &collective_chunk_list[i].chunk_states.new_chunk, &insert, collective_chunk_list[i].scaled) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate chunk")
+        } /* end for */
+
+        if (NULL == (num_chunks_selected_array = (size_t *) H5MM_malloc((size_t) mpi_size * sizeof(size_t))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate num chunks selected array")
+
+        if (MPI_SUCCESS != (mpi_code = MPI_Allgather(&chunk_list_num_entries, 1, MPI_UNSIGNED_LONG_LONG, num_chunks_selected_array,
+                1, MPI_UNSIGNED_LONG_LONG, io_info->comm)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Allgather failed", mpi_code)
+
+        /* If this process has any chunks selected, create a MPI type for collectively
+         * writing out the chunks to file. Otherwise, the process contributes to the
+         * collective write with a none type.
+         */
+        if (chunk_list_num_entries) {
+            size_t offset;
+
+            /* During the collective re-allocation of chunks in the file, the record for each
+             * chunk is only updated in the collective array, not in the local copy of chunks on each
+             * process. However, each process needs the updated chunk records so that they can create
+             * a MPI type for the collective write that will write to the chunk's possible new locations
+             * in the file instead of the old ones. This ugly hack seems to be the best solution to
+             * copy the information back to the local array and avoid having to modify the collective
+             * write type function in an ugly way so that it will accept the collective array instead
+             * of the local array. This works correctly because the array gather function guarantees
+             * that the chunk data in the collective array is ordered in blocks by rank.
+             */
+            for (i = 0, offset = 0; i < (size_t) mpi_rank; i++)
+                offset += num_chunks_selected_array[i];
+
+            HDmemcpy(chunk_list, &collective_chunk_list[offset], num_chunks_selected_array[mpi_rank] * sizeof(H5D_filtered_collective_io_info_t));
+
+            /* Create single MPI type encompassing each selection in the dataspace */
+            if (H5D__mpio_filtered_collective_write_type(chunk_list, chunk_list_num_entries,
+                    &mem_type, &mem_type_is_derived, &file_type, &file_type_is_derived) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_BADTYPE, FAIL, "couldn't create MPI link chunk I/O type")
+
+            /* Override the write buffer to point to the address of the first
+             * chunk data buffer
+             */
+            io_info->u.wbuf = chunk_list[0].buf;
+        } /* end if */
+
+        /* We have a single, complicated MPI datatype for both memory & file */
+        mpi_buf_count = (mem_type_is_derived && file_type_is_derived) ? (hsize_t) 1 : (hsize_t) 0;
+
+        /* Set up the base storage address for this operation */
+        ctg_store.contig.dset_addr = 0; /* Write address must be set to address 0 */
+        io_info->store = &ctg_store;
+
+        /* Perform I/O */
+        if (H5D__final_collective_io(io_info, type_info, mpi_buf_count, file_type, mem_type) < 0)
+            HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish MPI-IO")
+
+        /* Participate in the collective re-insertion of all chunks modified
+         * in this iteration into the chunk index
+         */
+        for (i = 0; i < collective_chunk_list_num_entries; i++) {
+            udata.chunk_block = collective_chunk_list[i].chunk_states.new_chunk;
+            udata.common.scaled = collective_chunk_list[i].scaled;
+            udata.chunk_idx = collective_chunk_list[i].index;
+
+            if ((index_info.storage->ops->insert)(&index_info, &udata, io_info->dset) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert chunk address into index")
+        } /* end for */
+    } /* end if */
+
+done:
+    /* Free resources used by a process which had some selection */
+    if (chunk_list) {
+        for (i = 0; i < chunk_list_num_entries; i++)
+            if (chunk_list[i].buf)
+                H5MM_free(chunk_list[i].buf);
+
+        H5MM_free(chunk_list);
+    } /* end if */
+
+    if (num_chunks_selected_array)
+        H5MM_free(num_chunks_selected_array);
+    if (collective_chunk_list)
+        H5MM_free(collective_chunk_list);
+
+    /* Free the MPI buf and file types, if they were derived */
+    if (mem_type_is_derived && MPI_SUCCESS != (mpi_code = MPI_Type_free(&mem_type)))
+        HMPI_DONE_ERROR(FAIL, "MPI_Type_free failed", mpi_code)
+    if (file_type_is_derived && MPI_SUCCESS != (mpi_code = MPI_Type_free(&file_type)))
+        HMPI_DONE_ERROR(FAIL, "MPI_Type_free failed", mpi_code)
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__link_chunk_filtered_collective_io() */
+
+
+/*-------------------------------------------------------------------------
  * Function:    H5D__multi_chunk_collective_io
  *
  * Purpose:     To do IO per chunk according to IO mode(collective/independent/none)
@@ -1109,17 +1412,11 @@ if(H5DEBUG(D))
  * Programmer:  Muqun Yang
  *              Monday, Feb. 13th, 2006
  *
- * Modification:
- *  - Set H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME dxpl in this to go along with
- *    setting H5D_MPIO_ACTUAL_IO_MODE_NAME dxpl at the bottom.
- * Programmer: Jonathan Kim
- * Date: 2012-10-10
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5D__multi_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
-    H5D_chunk_map_t *fm, H5P_genplist_t *dx_plist)
+    H5D_chunk_map_t *fm)
 {
     H5D_io_info_t       ctg_io_info;          /* Contiguous I/O info object */
     H5D_storage_t       ctg_store;            /* Chunk storage information as contiguous dataset */
@@ -1129,22 +1426,19 @@ H5D__multi_chunk_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *ty
     uint8_t            *chunk_io_option = NULL;
     haddr_t            *chunk_addr = NULL;
     H5D_storage_t       store;                /* union of EFL and chunk pointer in file space */
-    H5FD_mpio_xfer_t    last_xfer_mode = H5FD_MPIO_COLLECTIVE; /* Last parallel transfer for this request (H5D_XFER_IO_XFER_MODE_NAME) */
     H5FD_mpio_collective_opt_t last_coll_opt_mode = H5FD_MPIO_COLLECTIVE_IO; /* Last parallel transfer with independent IO or collective IO with this mode */
     size_t              total_chunk;          /* Total # of chunks in dataset */
 #ifdef H5Dmpio_DEBUG
     int mpi_rank;
 #endif
     size_t              u;                    /* Local index variable */
-    H5D_mpio_actual_chunk_opt_mode_t actual_chunk_opt_mode = H5D_MPIO_MULTI_CHUNK;  /* actual chunk optimization mode */
     H5D_mpio_actual_io_mode_t actual_io_mode = H5D_MPIO_NO_COLLECTIVE; /* Local variable for tracking the I/O mode used. */
     herr_t              ret_value = SUCCEED;
 
     FUNC_ENTER_STATIC
 
     /* Set the actual chunk opt mode property */
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME, &actual_chunk_opt_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual chunk opt mode property")
+    H5CX_set_mpio_actual_chunk_opt(H5D_MPIO_MULTI_CHUNK);
 
 #ifdef H5Dmpio_DEBUG
     mpi_rank = H5F_mpi_get_rank(io_info->dset->oloc.file);
@@ -1163,7 +1457,7 @@ if(H5DEBUG(D))
 #endif
 
     /* Obtain IO option for each chunk */
-    if(H5D__obtain_mpio_mode(io_info, fm, dx_plist, chunk_io_option, chunk_addr) < 0)
+    if(H5D__obtain_mpio_mode(io_info, fm, chunk_io_option, chunk_addr) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTRECV, FAIL, "unable to obtain MPIO mode")
 
     /* Set up contiguous I/O info object */
@@ -1221,13 +1515,13 @@ if(H5DEBUG(D))
                 fspace = chunk_info->fspace;
                 mspace = chunk_info->mspace;
 
-                /* Update the local variable tracking the dxpl's actual io mode property.
+                /* Update the local variable tracking the actual io mode property.
                  *
                  * Note: H5D_MPIO_COLLECTIVE_MULTI | H5D_MPIO_INDEPENDENT = H5D_MPIO_MIXED
                  *      to ease switching between to mixed I/O without checking the current
                  *      value of the property. You can see the definition in H5Ppublic.h
                  */
-                actual_io_mode = actual_io_mode | H5D_MPIO_CHUNK_COLLECTIVE;
+                actual_io_mode = (H5D_mpio_actual_io_mode_t) (actual_io_mode | H5D_MPIO_CHUNK_COLLECTIVE);
 
             } /* end if */
             else {
@@ -1235,14 +1529,9 @@ if(H5DEBUG(D))
             } /* end else */
 
             /* Switch back to collective I/O */
-            if(last_xfer_mode != H5FD_MPIO_COLLECTIVE) {
-                if(H5D__ioinfo_xfer_mode(io_info, dx_plist, H5FD_MPIO_COLLECTIVE) < 0)
-                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't switch to collective I/O")
-                last_xfer_mode = H5FD_MPIO_COLLECTIVE;
-            } /* end if */
             if(last_coll_opt_mode != H5FD_MPIO_COLLECTIVE_IO) {
-                if(H5D__ioinfo_coll_opt_mode(io_info, dx_plist, H5FD_MPIO_COLLECTIVE_IO) < 0)
-                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't switch to collective I/O")
+                if(H5CX_set_mpio_coll_opt(H5FD_MPIO_COLLECTIVE_IO) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't switch to collective I/O")
                 last_coll_opt_mode = H5FD_MPIO_COLLECTIVE_IO;
             } /* end if */
 
@@ -1266,8 +1555,8 @@ if(H5DEBUG(D))
                 fspace = chunk_info->fspace;
                 mspace = chunk_info->mspace;
 
-                /* Update the local variable tracking the dxpl's actual io mode. */
-                actual_io_mode = actual_io_mode | H5D_MPIO_CHUNK_INDEPENDENT;
+                /* Update the local variable tracking the actual io mode. */
+                actual_io_mode = (H5D_mpio_actual_io_mode_t) (actual_io_mode | H5D_MPIO_CHUNK_INDEPENDENT);
             } /* end if */
             else {
                 fspace = mspace = NULL;
@@ -1275,8 +1564,8 @@ if(H5DEBUG(D))
 
             /* Using independent I/O with file setview.*/
             if(last_coll_opt_mode != H5FD_MPIO_INDIVIDUAL_IO) {
-                if(H5D__ioinfo_coll_opt_mode(io_info, dx_plist, H5FD_MPIO_INDIVIDUAL_IO) < 0)
-                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't switch to individual I/O")
+                if(H5CX_set_mpio_coll_opt(H5FD_MPIO_INDIVIDUAL_IO) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't switch to individual I/O")
                 last_coll_opt_mode = H5FD_MPIO_INDIVIDUAL_IO;
             } /* end if */
 
@@ -1293,9 +1582,8 @@ if(H5DEBUG(D))
         } /* end else */
     } /* end for */
 
-    /* Write the local value of actual io mode to the DXPL. */
-    if(H5P_set(dx_plist, H5D_MPIO_ACTUAL_IO_MODE_NAME, &actual_io_mode) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "couldn't set actual io mode property")
+    /* Write the local value of actual io mode to the API context. */
+    H5CX_set_mpio_actual_io_mode(actual_io_mode);
 
 done:
     if(chunk_io_option)
@@ -1308,6 +1596,308 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5D__multi_chunk_filtered_collective_io
+ *
+ * Purpose:     To do filtered collective IO iteratively to save on memory.
+ *              While link_chunk_filtered_collective_io will construct and
+ *              work on a list of all of the chunks selected in the IO
+ *              operation at once, this function works iteratively on a set
+ *              of chunks at a time; at most one chunk per rank per
+ *              iteration.
+ *
+ *              1. Construct a list of selected chunks in the collective IO
+ *                 operation
+ *                 A. If any chunk is being written to by more than 1
+ *                    process, the process writing to the chunk which
+ *                    currently has the least amount of chunks assigned
+ *                    to it becomes the new owner (in the case of ties,
+ *                    the lowest MPI rank becomes the new owner)
+ *              2. If the operation is a read operation
+ *                 A. Loop through each chunk in the operation
+ *                    I. Read the chunk from the file
+ *                    II. Unfilter the chunk
+ *                    III. Scatter the read chunk data to the user's buffer
+ *              3. If the operation is a write operation
+ *                 A. Loop through each chunk in the operation
+ *                    I. If this is not a full overwrite of the chunk
+ *                       a) Read the chunk from file and pass the chunk
+ *                          through the filter pipeline in reverse order
+ *                          (Unfilter the chunk)
+ *                    II. Update the chunk data with the modifications from
+ *                        the owning process
+ *                    III. Receive any modification data from other
+ *                         processes and update the chunk data with these
+ *                         modifications
+ *                    IV. Filter the chunk
+ *                    V. Contribute the chunk to an array gathered by
+ *                        all processes which contains every chunk
+ *                        modified in this iteration (up to one chunk
+ *                        per process, some processes may not have a
+ *                        selection/may have less chunks to work on than
+ *                        other processes)
+ *                    VI. All processes collectively re-allocate each
+ *                        chunk from the gathered array with their new
+ *                        sizes after the filter operation
+ *                    VII. Proceed with the collective write operation
+ *                        for the chunks modified on this iteration
+ *                    VIII. All processes collectively re-insert each
+ *                       chunk from the gathered array into the chunk
+ *                       index
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Jordan Henderson
+ *              Friday, Dec. 2nd, 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__multi_chunk_filtered_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
+    H5D_chunk_map_t *fm)
+{
+    H5D_filtered_collective_io_info_t *chunk_list = NULL; /* The list of chunks being read/written */
+    H5D_filtered_collective_io_info_t *collective_chunk_list = NULL; /* The list of chunks used during collective operations */
+    H5D_storage_t                      store;                /* union of EFL and chunk pointer in file space */
+    H5D_io_info_t                      ctg_io_info;          /* Contiguous I/O info object */
+    H5D_storage_t                      ctg_store;            /* Chunk storage information as contiguous dataset */
+    MPI_Datatype                      *file_type_array = NULL;
+    MPI_Datatype                      *mem_type_array = NULL;
+    hbool_t                           *file_type_is_derived_array = NULL;
+    hbool_t                           *mem_type_is_derived_array = NULL;
+    hbool_t                           *has_chunk_selected_array = NULL; /* Array of whether or not each process is contributing a chunk to each iteration */
+    size_t                             chunk_list_num_entries;
+    size_t                             collective_chunk_list_num_entries;
+    size_t                             i, j;                    /* Local index variable */
+    int                                mpi_rank, mpi_size, mpi_code;
+    herr_t                             ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    HDassert(io_info);
+    HDassert(type_info);
+    HDassert(fm);
+
+    /* Obtain the current rank of the process and the number of processes */
+    if ((mpi_rank = H5F_mpi_get_rank(io_info->dset->oloc.file)) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi rank")
+    if ((mpi_size = H5F_mpi_get_size(io_info->dset->oloc.file)) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi size")
+
+    /* Set the actual chunk opt mode property */
+    H5CX_set_mpio_actual_chunk_opt(H5D_MPIO_MULTI_CHUNK);
+
+    /* Set the actual_io_mode property.
+     * Multi chunk I/O does not break to independent, so can set right away
+     */
+    H5CX_set_mpio_actual_io_mode(H5D_MPIO_CHUNK_COLLECTIVE);
+
+    /* Build a list of selected chunks in the collective IO operation */
+    if (H5D__construct_filtered_io_info_list(io_info, type_info, fm, &chunk_list, &chunk_list_num_entries) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "couldn't construct filtered I/O info list")
+
+    /* Set up contiguous I/O info object */
+    HDmemcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
+    ctg_io_info.store = &ctg_store;
+    ctg_io_info.layout_ops = *H5D_LOPS_CONTIG;
+
+    /* Initialize temporary contiguous storage info */
+    ctg_store.contig.dset_size = (hsize_t) io_info->dset->shared->layout.u.chunk.size;
+    ctg_store.contig.dset_addr = 0;
+
+    /* Set dataset storage for I/O info */
+    io_info->store = &store;
+
+    if (io_info->op_type == H5D_IO_OP_READ) { /* Filtered collective read */
+        for (i = 0; i < chunk_list_num_entries; i++)
+            if (H5D__filtered_collective_chunk_entry_io(&chunk_list[i], io_info, type_info, fm) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "couldn't process chunk entry")
+    } /* end if */
+    else { /* Filtered collective write */
+        H5D_chk_idx_info_t index_info;
+        H5D_chunk_ud_t     udata;
+        size_t             max_num_chunks;
+        hsize_t            mpi_buf_count;
+
+        /* Construct chunked index info */
+        index_info.f = io_info->dset->oloc.file;
+        index_info.pline = &(io_info->dset->shared->dcpl_cache.pline);
+        index_info.layout = &(io_info->dset->shared->layout.u.chunk);
+        index_info.storage = &(io_info->dset->shared->layout.storage.u.chunk);
+
+        /* Set up chunk information for insertion to chunk index */
+        udata.common.layout = index_info.layout;
+        udata.common.storage = index_info.storage;
+        udata.filter_mask = 0;
+
+        /* Retrieve the maximum number of chunks being written among all processes */
+        if (MPI_SUCCESS != (mpi_code = MPI_Allreduce(&chunk_list_num_entries, &max_num_chunks,
+                1, MPI_UNSIGNED_LONG_LONG, MPI_MAX, io_info->comm)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Allreduce failed", mpi_code)
+
+        /* If no one is writing anything at all, end the operation */
+        if (!(max_num_chunks > 0)) HGOTO_DONE(SUCCEED);
+
+        /* Allocate arrays for storing MPI file and mem types and whether or not the
+         * types were derived.
+         */
+        if (NULL == (file_type_array = (MPI_Datatype *) H5MM_malloc(max_num_chunks * sizeof(MPI_Datatype))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate file type array")
+
+        if (NULL == (file_type_is_derived_array = (hbool_t *) H5MM_calloc(max_num_chunks * sizeof(hbool_t))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate file type is derived array")
+
+        if (NULL == (mem_type_array = (MPI_Datatype *) H5MM_malloc(max_num_chunks * sizeof(MPI_Datatype))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate mem type array")
+
+        if (NULL == (mem_type_is_derived_array = (hbool_t *) H5MM_calloc(max_num_chunks * sizeof(hbool_t))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate mem type is derived array")
+
+        /* Iterate over the max number of chunks among all processes, as this process could
+         * have no chunks left to work on, but it still needs to participate in the collective
+         * re-allocation and re-insertion of chunks modified by other processes.
+         */
+        for (i = 0; i < max_num_chunks; i++) {
+            /* Check if this process has a chunk to work on for this iteration */
+            hbool_t have_chunk_to_process = (i < chunk_list_num_entries) && (mpi_rank == chunk_list[i].owners.new_owner);
+
+            if (have_chunk_to_process)
+                if (H5D__filtered_collective_chunk_entry_io(&chunk_list[i], io_info, type_info, fm) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "couldn't process chunk entry")
+
+            /* Gather the new chunk sizes to all processes for a collective re-allocation
+             * of the chunks in the file
+             */
+            if (H5D__mpio_array_gatherv(&chunk_list[i], have_chunk_to_process ? 1 : 0, sizeof(H5D_filtered_collective_io_info_t),
+                    (void **) &collective_chunk_list, &collective_chunk_list_num_entries, mpi_size,
+                    true, 0, io_info->comm, NULL) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTGATHER, FAIL, "couldn't gather new chunk sizes")
+
+            /* Participate in the collective re-allocation of all chunks modified
+             * in this iteration.
+             */
+            for (j = 0; j < collective_chunk_list_num_entries; j++) {
+                hbool_t insert = FALSE;
+
+                if (H5D__chunk_file_alloc(&index_info, &collective_chunk_list[j].chunk_states.chunk_current,
+                        &collective_chunk_list[j].chunk_states.new_chunk, &insert, chunk_list[j].scaled) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate chunk")
+            } /* end for */
+
+            if (NULL == (has_chunk_selected_array = (hbool_t *) H5MM_malloc((size_t) mpi_size * sizeof(hbool_t))))
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate num chunks selected array")
+
+            if (MPI_SUCCESS != (mpi_code = MPI_Allgather(&have_chunk_to_process, 1, MPI_C_BOOL, has_chunk_selected_array,
+                    1, MPI_C_BOOL, io_info->comm)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Allgather failed", mpi_code)
+
+            /* If this process has a chunk to work on, create a MPI type for the
+             * memory and file for writing out the chunk
+             */
+            if (have_chunk_to_process) {
+                size_t offset;
+                int    mpi_type_count;
+
+                for (j = 0, offset = 0; j < (size_t) mpi_rank; j++)
+                    offset += has_chunk_selected_array[j];
+
+                /* Collect the new chunk info back to the local copy, since only the record in the
+                 * collective array gets updated by the chunk re-allocation */
+                HDmemcpy(&chunk_list[i].chunk_states.new_chunk, &collective_chunk_list[offset].chunk_states.new_chunk, sizeof(chunk_list[i].chunk_states.new_chunk));
+
+                H5_CHECKED_ASSIGN(mpi_type_count, int, chunk_list[i].chunk_states.new_chunk.length, hsize_t);
+
+                /* Create MPI memory type for writing to chunk */
+                if (MPI_SUCCESS != (mpi_code = MPI_Type_contiguous(mpi_type_count, MPI_BYTE, &mem_type_array[i])))
+                    HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+                if(MPI_SUCCESS != (mpi_code = MPI_Type_commit(&mem_type_array[i])))
+                    HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+                mem_type_is_derived_array[i] = TRUE;
+
+                /* Create MPI file type for writing to chunk */
+                if (MPI_SUCCESS != (mpi_code = MPI_Type_contiguous(mpi_type_count, MPI_BYTE, &file_type_array[i])))
+                    HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+                if(MPI_SUCCESS != (mpi_code = MPI_Type_commit(&file_type_array[i])))
+                    HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+                file_type_is_derived_array[i] = TRUE;
+
+                mpi_buf_count = 1;
+
+                /* Set up the base storage address for this operation */
+                ctg_store.contig.dset_addr = chunk_list[i].chunk_states.new_chunk.offset;
+
+                /* Override the write buffer to point to the address of the
+                 * chunk data buffer
+                 */
+                ctg_io_info.u.wbuf = chunk_list[i].buf;
+            } /* end if */
+            else {
+                mem_type_array[i] = file_type_array[i] = MPI_BYTE;
+                mpi_buf_count = 0;
+            } /* end else */
+
+            /* Perform the I/O */
+            if (H5D__final_collective_io(&ctg_io_info, type_info, mpi_buf_count, file_type_array[i], mem_type_array[i]) < 0)
+                HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish MPI-IO")
+
+            /* Participate in the collective re-insertion of all chunks modified
+             * in this iteration into the chunk index
+             */
+            for (j = 0; j < collective_chunk_list_num_entries; j++) {
+                udata.chunk_block = collective_chunk_list[j].chunk_states.new_chunk;
+                udata.common.scaled = collective_chunk_list[j].scaled;
+                udata.chunk_idx = collective_chunk_list[j].index;
+
+                if ((index_info.storage->ops->insert)(&index_info, &udata, io_info->dset) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTINSERT, FAIL, "unable to insert chunk address into index")
+            } /* end for */
+
+            if (collective_chunk_list){
+                H5MM_free(collective_chunk_list);
+                collective_chunk_list = NULL;
+            } /* end if */
+            if (has_chunk_selected_array){
+                H5MM_free(has_chunk_selected_array);
+                has_chunk_selected_array = NULL;
+            } /* end if */
+        } /* end for */
+
+        /* Free the MPI file and memory types, if they were derived */
+        for (i = 0; i < max_num_chunks; i++) {
+            if (file_type_is_derived_array[i])
+                if (MPI_SUCCESS != (mpi_code = MPI_Type_free(&file_type_array[i])))
+                    HMPI_DONE_ERROR(FAIL, "MPI_Type_free failed", mpi_code)
+
+            if (mem_type_is_derived_array[i])
+                if (MPI_SUCCESS != (mpi_code = MPI_Type_free(&mem_type_array[i])))
+                    HMPI_DONE_ERROR(FAIL, "MPI_Type_free failed", mpi_code)
+        } /* end for */
+    } /* end else */
+
+done:
+    if (chunk_list) {
+        for (i = 0; i < chunk_list_num_entries; i++)
+            if (chunk_list[i].buf)
+                H5MM_free(chunk_list[i].buf);
+
+        H5MM_free(chunk_list);
+    } /* end if */
+
+    if (collective_chunk_list)
+        H5MM_free(collective_chunk_list);
+    if (file_type_array)
+        H5MM_free(file_type_array);
+    if (mem_type_array)
+        H5MM_free(mem_type_array);
+    if (file_type_is_derived_array)
+        H5MM_free(file_type_is_derived_array);
+    if (mem_type_is_derived_array)
+        H5MM_free(mem_type_is_derived_array);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__multi_chunk_filtered_collective_io() */
+
+
+/*-------------------------------------------------------------------------
  * Function:    H5D__inter_collective_io
  *
  * Purpose:     Routine for the shared part of collective IO between multiple chunk
@@ -1396,7 +1986,7 @@ if(H5DEBUG(D))
 #endif
 
     /* Perform final collective I/O operation */
-    if(H5D__final_collective_io(io_info, type_info, (hsize_t)mpi_buf_count, &mpi_file_type, &mpi_buf_type) < 0)
+    if(H5D__final_collective_io(io_info, type_info, (hsize_t)mpi_buf_count, mpi_file_type, mpi_buf_type) < 0)
         HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't finish collective MPI-IO")
 
 done:
@@ -1429,15 +2019,15 @@ if(H5DEBUG(D))
  */
 static herr_t
 H5D__final_collective_io(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
-    hsize_t mpi_buf_count, MPI_Datatype *mpi_file_type, MPI_Datatype *mpi_buf_type)
+    hsize_t mpi_buf_count, MPI_Datatype mpi_file_type, MPI_Datatype mpi_buf_type)
 {
     herr_t      ret_value = SUCCEED;
 
     FUNC_ENTER_STATIC
 
     /* Pass buf type, file type to the file driver.  */
-    if(H5FD_mpi_setup_collective(io_info->raw_dxpl_id, mpi_buf_type, mpi_file_type) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set MPI-I/O properties")
+    if(H5CX_set_mpi_coll_datatypes(mpi_buf_type, mpi_file_type) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set MPI-I/O collective I/O datatypes")
 
     if(io_info->op_type == H5D_IO_OP_WRITE) {
         if((io_info->io_ops.single_write)(io_info, type_info, mpi_buf_count, NULL, NULL) < 0)
@@ -1474,7 +2064,7 @@ if(H5DEBUG(D))
 static int
 H5D__cmp_chunk_addr(const void *chunk_addr_info1, const void *chunk_addr_info2)
 {
-   haddr_t addr1, addr2;
+   haddr_t addr1 = HADDR_UNDEF, addr2 = HADDR_UNDEF;
 
    FUNC_ENTER_STATIC_NOERR
 
@@ -1486,6 +2076,67 @@ H5D__cmp_chunk_addr(const void *chunk_addr_info1, const void *chunk_addr_info2)
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5D__cmp_filtered_collective_io_info_entry
+ *
+ * Purpose:     Routine to compare filtered collective chunk io info
+ *              entries
+ *
+ * Description: Callback for qsort() to compare filtered collective chunk
+ *              io info entries
+ *
+ * Return:      -1, 0, 1
+ *
+ * Programmer:  Jordan Henderson
+ *              Wednesday, Nov. 30th, 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+H5D__cmp_filtered_collective_io_info_entry(const void *filtered_collective_io_info_entry1, const void *filtered_collective_io_info_entry2)
+{
+    haddr_t addr1 = HADDR_UNDEF, addr2 = HADDR_UNDEF;
+
+    FUNC_ENTER_STATIC_NOERR
+
+    addr1 = ((const H5D_filtered_collective_io_info_t *) filtered_collective_io_info_entry1)->chunk_states.new_chunk.offset;
+    addr2 = ((const H5D_filtered_collective_io_info_t *) filtered_collective_io_info_entry2)->chunk_states.new_chunk.offset;
+
+    FUNC_LEAVE_NOAPI(H5F_addr_cmp(addr1, addr2))
+} /* end H5D__cmp_filtered_collective_io_info_entry() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5D__cmp_filtered_collective_io_info_entry_owner
+ *
+ * Purpose:     Routine to compare filtered collective chunk io info
+ *              entries's original owner fields
+ *
+ * Description: Callback for qsort() to compare filtered collective chunk
+ *              io info entries's original owner fields
+ *
+ * Return:      The difference between the two
+ *              H5D_filtered_collective_io_info_t's original owner fields
+ *
+ * Programmer:  Jordan Henderson
+ *              Monday, Apr. 10th, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static int
+H5D__cmp_filtered_collective_io_info_entry_owner(const void *filtered_collective_io_info_entry1, const void *filtered_collective_io_info_entry2)
+{
+    int owner1 = -1, owner2 = -1;
+
+    FUNC_ENTER_STATIC_NOERR
+
+    owner1 = ((const H5D_filtered_collective_io_info_t *) filtered_collective_io_info_entry1)->owners.original_owner;
+    owner2 = ((const H5D_filtered_collective_io_info_t *) filtered_collective_io_info_entry2)->owners.original_owner;
+
+    FUNC_LEAVE_NOAPI(owner1 - owner2)
+} /* end H5D__cmp_filtered_collective_io_info_entry_owner() */
+
+
+/*-------------------------------------------------------------------------
  * Function:    H5D__sort_chunk
  *
  * Purpose:     Routine to sort chunks in increasing order of chunk address
@@ -1559,7 +2210,7 @@ if(H5DEBUG(D))
     HDfprintf(H5DEBUG(D), "Coming inside H5D_OBTAIN_ALL_CHUNK_ADDR_COL\n");
 #endif
         /* Allocate array for chunk addresses */
-        if(NULL == (total_chunk_addr_array = H5MM_malloc(sizeof(haddr_t) * (size_t)fm->layout->u.chunk.nchunks)))
+        if(NULL == (total_chunk_addr_array = (haddr_t *)H5MM_malloc(sizeof(haddr_t) * (size_t)fm->layout->u.chunk.nchunks)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate memory chunk address array")
 
         /* Retrieve all the chunk addresses with process 0 */
@@ -1583,14 +2234,14 @@ if(H5DEBUG(D))
 
     /* Iterate over all chunks for this process */
     while(chunk_node) {
-        if(NULL == (chunk_info = H5SL_item(chunk_node)))
+        if(NULL == (chunk_info = (H5D_chunk_info_t *)H5SL_item(chunk_node)))
             HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL,"couldn't get chunk info from skipped list")
 
         if(many_chunk_opt == H5D_OBTAIN_ONE_CHUNK_ADDR_IND) {
             H5D_chunk_ud_t udata;   /* User data for querying chunk info */
 
             /* Get address of chunk */
-            if(H5D__chunk_lookup(io_info->dset, io_info->md_dxpl_id, chunk_info->scaled, &udata) < 0)
+            if(H5D__chunk_lookup(io_info->dset, chunk_info->scaled, &udata) < 0)
                 HGOTO_ERROR(H5E_STORAGE, H5E_CANTGET, FAIL, "couldn't get chunk info from skipped list")
             chunk_addr = udata.chunk_block.offset;
         } /* end if */
@@ -1666,9 +2317,9 @@ done:
  */
 static herr_t
 H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
-    H5P_genplist_t *dx_plist, uint8_t assign_io_mode[], haddr_t chunk_addr[])
+    uint8_t assign_io_mode[], haddr_t chunk_addr[])
 {
-    int               total_chunks;
+    size_t            total_chunks;
     unsigned          percent_nproc_per_chunk, threshold_nproc_per_chunk;
     uint8_t*          io_mode_info = NULL;
     uint8_t*          recv_io_mode_info = NULL;
@@ -1678,12 +2329,9 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
     H5D_chunk_info_t* chunk_info;
     int               mpi_size, mpi_rank;
     MPI_Comm          comm;
-    int               ic, root;
+    int               root;
+    size_t            ic;
     int               mpi_code;
-#ifdef H5_HAVE_INSTRUMENTED_LIBRARY
-    int new_value;
-    htri_t check_prop;
-#endif
     herr_t            ret_value = SUCCEED;
 
     FUNC_ENTER_STATIC
@@ -1699,9 +2347,9 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
         HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi size")
 
     /* Setup parameters */
-    H5_CHECKED_ASSIGN(total_chunks, int, fm->layout->u.chunk.nchunks, hsize_t);
-    if(H5P_get(dx_plist, H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME, &percent_nproc_per_chunk) < 0)
-        HGOTO_ERROR(H5E_IO, H5E_CANTGET, FAIL, "couldn't get percent nproc per chunk")
+    H5_CHECKED_ASSIGN(total_chunks, size_t, fm->layout->u.chunk.nchunks, hsize_t);
+    if(H5CX_get_mpio_chunk_opt_ratio(&percent_nproc_per_chunk) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "couldn't get percent nproc per chunk")
     /* if ratio is 0, perform collective io */
     if(0 == percent_nproc_per_chunk) {
         if(H5D__chunk_addrmap(io_info, chunk_addr) < 0)
@@ -1711,39 +2359,42 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
 
         HGOTO_DONE(SUCCEED)
     } /* end if */
-    threshold_nproc_per_chunk = mpi_size * percent_nproc_per_chunk/100;
+
+    threshold_nproc_per_chunk = (unsigned)mpi_size * percent_nproc_per_chunk/100;
 
     /* Allocate memory */
     if(NULL == (io_mode_info = (uint8_t *)H5MM_calloc(total_chunks)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate I/O mode info buffer")
-    if(NULL == (mergebuf = H5MM_malloc((sizeof(haddr_t) + 1) * total_chunks)))
+    if(NULL == (mergebuf = (uint8_t *)H5MM_malloc((sizeof(haddr_t) + 1) * total_chunks)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate mergebuf buffer")
     tempbuf           = mergebuf + total_chunks;
     if(mpi_rank == root)
-        if(NULL == (recv_io_mode_info = (uint8_t *)H5MM_malloc(total_chunks * mpi_size)))
+        if(NULL == (recv_io_mode_info = (uint8_t *)H5MM_malloc(total_chunks * (size_t)mpi_size)))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate recv I/O mode info buffer")
 
     /* Obtain the regularity and selection information for all chunks in this process. */
     chunk_node        = H5SL_first(fm->sel_chunks);
     while(chunk_node) {
-        chunk_info    = H5SL_item(chunk_node);
+        chunk_info    = (H5D_chunk_info_t *)H5SL_item(chunk_node);
 
-            io_mode_info[chunk_info->index] = H5D_CHUNK_SELECT_REG; /* this chunk is selected and is "regular" */
+        io_mode_info[chunk_info->index] = H5D_CHUNK_SELECT_REG; /* this chunk is selected and is "regular" */
         chunk_node = H5SL_next(chunk_node);
     } /* end while */
 
     /* Gather all the information */
-    if(MPI_SUCCESS != (mpi_code = MPI_Gather(io_mode_info, total_chunks, MPI_BYTE, recv_io_mode_info, total_chunks, MPI_BYTE, root, comm)))
+    H5_CHECK_OVERFLOW(total_chunks, size_t, int)
+    if(MPI_SUCCESS != (mpi_code = MPI_Gather(io_mode_info, (int)total_chunks, MPI_BYTE,
+            recv_io_mode_info, (int)total_chunks, MPI_BYTE, root, comm)))
         HMPI_GOTO_ERROR(FAIL, "MPI_Gather failed", mpi_code)
 
     /* Calculate the mode for IO(collective, independent or none) at root process */
     if(mpi_rank == root) {
-        int               nproc;
-        int*              nproc_per_chunk;
+        size_t            nproc;
+        unsigned*         nproc_per_chunk;
 
         /* pre-computing: calculate number of processes and
             regularity of the selection occupied in each chunk */
-        if(NULL == (nproc_per_chunk = (int*)H5MM_calloc(total_chunks * sizeof(int))))
+        if(NULL == (nproc_per_chunk = (unsigned*)H5MM_calloc(total_chunks * sizeof(unsigned))))
             HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate nproc_per_chunk buffer")
 
         /* calculating the chunk address */
@@ -1753,7 +2404,7 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
         } /* end if */
 
         /* checking for number of process per chunk and regularity of the selection*/
-        for(nproc = 0; nproc < mpi_size; nproc++) {
+        for(nproc = 0; nproc < (size_t)mpi_size; nproc++) {
             uint8_t *tmp_recv_io_mode_info = recv_io_mode_info + (nproc * total_chunks);
 
             /* Calculate the number of process per chunk and adding irregular selection option */
@@ -1788,40 +2439,19 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
 
 #ifdef H5_HAVE_INSTRUMENTED_LIBRARY
 {
-    H5P_genplist_t    *plist;           /* Property list pointer */
-
-    /* Get the dataset transfer property list */
-    if(NULL == (plist = (H5P_genplist_t *)H5I_object(io_info->raw_dxpl_id)))
-        HGOTO_ERROR(H5E_IO, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
-    check_prop = H5P_exist_plist(plist, H5D_XFER_COLL_CHUNK_MULTI_RATIO_COLL_NAME);
-    if(check_prop > 0) {
-        for(ic = 0; ic < total_chunks; ic++) {
-            if(assign_io_mode[ic] == H5D_CHUNK_IO_MODE_COL) {
-                new_value = 0;
-                if(H5P_set(plist, H5D_XFER_COLL_CHUNK_MULTI_RATIO_COLL_NAME, &new_value) < 0)
-                    HGOTO_ERROR(H5E_PLIST, H5E_UNSUPPORTED, FAIL, "unable to set property value")
-                break;
-            } /* end if */
-        } /* end for */
-    } /* end if */
-
-    check_prop = H5P_exist_plist(plist, H5D_XFER_COLL_CHUNK_MULTI_RATIO_IND_NAME);
-    if(check_prop > 0) {
-        int temp_count = 0;
-
-        for(ic = 0; ic < total_chunks; ic++) {
-            if(assign_io_mode[ic] == H5D_CHUNK_IO_MODE_COL) {
-                temp_count++;
-                break;
-            } /* end if */
-        } /* end for */
-        if(temp_count == 0) {
-            new_value = 0;
-            if(H5P_set(plist, H5D_XFER_COLL_CHUNK_MULTI_RATIO_IND_NAME, &new_value) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_UNSUPPORTED, FAIL, "unable to set property value")
+    hbool_t coll_op = FALSE;
+
+    for(ic = 0; ic < total_chunks; ic++)
+        if(assign_io_mode[ic] == H5D_CHUNK_IO_MODE_COL) {
+            if(H5CX_test_set_mpio_coll_chunk_multi_ratio_coll(0) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set property value")
+            coll_op = TRUE;
+            break;
         } /* end if */
-    } /* end if */
+
+    if(!coll_op)
+        if(H5CX_test_set_mpio_coll_chunk_multi_ratio_ind(0) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to set property value")
 }
 #endif
 
@@ -1837,5 +2467,729 @@ done:
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__obtain_mpio_mode() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5D__construct_filtered_io_info_list
+ *
+ * Purpose:     Constructs a list of entries which contain the necessary
+ *              information for inter-process communication when performing
+ *              collective io on filtered chunks. This list is used by
+ *              each process when performing I/O on locally selected chunks
+ *              and also in operations that must be collectively done
+ *              on every chunk, such as chunk re-allocation, insertion of
+ *              chunks into the chunk index, etc.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Jordan Henderson
+ *              Tuesday, January 10th, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__construct_filtered_io_info_list(const H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
+    const H5D_chunk_map_t *fm, H5D_filtered_collective_io_info_t **chunk_list, size_t *num_entries)
+{
+    H5D_filtered_collective_io_info_t *local_info_array = NULL; /* The list of initially selected chunks for this process */
+    size_t                             num_chunks_selected;
+    size_t                             i;
+    int                                mpi_rank;
+    herr_t                             ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    HDassert(io_info);
+    HDassert(type_info);
+    HDassert(fm);
+    HDassert(chunk_list);
+    HDassert(num_entries);
+
+    if ((mpi_rank = H5F_mpi_get_rank(io_info->dset->oloc.file)) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi rank")
+
+    /* Each process builds a local list of the chunks they have selected */
+    if ((num_chunks_selected = H5SL_count(fm->sel_chunks))) {
+        H5D_chunk_info_t *chunk_info;
+        H5D_chunk_ud_t    udata;
+        H5SL_node_t      *chunk_node;
+        hssize_t          select_npoints;
+        hssize_t          chunk_npoints;
+
+        if(NULL == (local_info_array = (H5D_filtered_collective_io_info_t *) H5MM_malloc(num_chunks_selected * sizeof(H5D_filtered_collective_io_info_t))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate local io info array buffer")
+
+        chunk_node = H5SL_first(fm->sel_chunks);
+        for(i = 0; chunk_node; i++) {
+            chunk_info = (H5D_chunk_info_t *) H5SL_item(chunk_node);
+
+            /* Obtain this chunk's address */
+            if(H5D__chunk_lookup(io_info->dset, chunk_info->scaled, &udata) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "error looking up chunk address")
+
+            local_info_array[i].index = chunk_info->index;
+            local_info_array[i].chunk_states.chunk_current = local_info_array[i].chunk_states.new_chunk = udata.chunk_block;
+            local_info_array[i].num_writers = 0;
+            local_info_array[i].owners.original_owner = local_info_array[i].owners.new_owner = mpi_rank;
+            local_info_array[i].buf = NULL;
+            
+            local_info_array[i].async_info.num_receive_requests = 0;
+            local_info_array[i].async_info.receive_buffer_array = NULL;
+            local_info_array[i].async_info.receive_requests_array = NULL;
+
+            HDmemcpy(local_info_array[i].scaled, chunk_info->scaled, sizeof(chunk_info->scaled));
+
+            if ((select_npoints = H5S_GET_SELECT_NPOINTS(chunk_info->mspace)) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
+            local_info_array[i].io_size = (size_t) select_npoints * type_info->src_type_size;
+
+            /* Currently the full overwrite status of a chunk is only obtained on a per-process
+             * basis. This means that if the total selection in the chunk, as determined by the combination
+             * of selections of all of the processes interested in the chunk, covers the entire chunk,
+             * the performance optimization of not reading the chunk from the file is still valid, but
+             * is not applied in the current implementation. Something like an appropriately placed
+             * MPI_Allreduce or a running total of the number of chunk points selected during chunk
+             * redistribution should suffice for implementing this case - JTH.
+             */
+            if ((chunk_npoints = H5S_GET_EXTENT_NPOINTS(chunk_info->fspace)) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
+            local_info_array[i].full_overwrite =
+                    (local_info_array[i].io_size >= (hsize_t) chunk_npoints * type_info->dst_type_size) ? TRUE : FALSE;
+
+            chunk_node = H5SL_next(chunk_node);
+        } /* end for */
+    } /* end if */
+
+    /* Redistribute shared chunks to new owners as necessary */
+    if (io_info->op_type == H5D_IO_OP_WRITE)
+        if (H5D__chunk_redistribute_shared_chunks(io_info, type_info, fm, local_info_array, &num_chunks_selected) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to redistribute shared chunks")
+
+    *chunk_list = local_info_array;
+    *num_entries = num_chunks_selected;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__construct_filtered_io_info_list() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5D__chunk_redistribute_shared_chunks
+ *
+ * Purpose:     When performing a collective write on a Dataset with
+ *              filters applied, this function is used to redistribute any
+ *              chunks which are selected by more than one process, so as
+ *              to preserve file integrity after the write by ensuring
+ *              that any shared chunks are only modified by one process.
+ *
+ *              The current implementation follows this 3-phase process:
+ *
+ *              - Collect everyone's list of chunks into one large list,
+ *                sort the list in increasing order of chunk offset in the
+ *                file and hand the list off to rank 0
+ *
+ *              - Rank 0 scans the list looking for matching runs of chunk
+ *                offset in the file (corresponding to a shared chunk which
+ *                has been selected by more than one rank in the I/O
+ *                operation) and for each shared chunk, it redistributes
+ *                the chunk to the process writing to the chunk which
+ *                currently has the least amount of chunks assigned to it
+ *                by modifying the "new_owner" field in each of the list
+ *                entries corresponding to that chunk
+ *
+ *              - After the chunks have been redistributed, rank 0 re-sorts
+ *                the list in order of previous owner so that each rank
+ *                will get back exactly the array that they contributed to
+ *                the redistribution operation, with the "new_owner" field
+ *                of each chunk they are modifying having possibly been
+ *                modified. Rank 0 then scatters each segment of the list
+ *                back to its corresponding rank
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Jordan Henderson
+ *              Monday, May 1, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__chunk_redistribute_shared_chunks(const H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
+    const H5D_chunk_map_t *fm, H5D_filtered_collective_io_info_t *local_chunk_array, size_t *local_chunk_array_num_entries)
+{
+    H5D_filtered_collective_io_info_t  *shared_chunks_info_array = NULL; /* The list of all chunks selected in the operation by all processes */
+    H5S_sel_iter_t                     *mem_iter = NULL; /* Memory iterator for H5D__gather_mem */
+    unsigned char                     **mod_data = NULL; /* Array of chunk modification data buffers sent by a process to new chunk owners */
+    MPI_Request                        *send_requests = NULL; /* Array of MPI_Isend chunk modification data send requests */
+    MPI_Status                         *send_statuses = NULL; /* Array of MPI_Isend chunk modification send statuses */
+    hbool_t                             mem_iter_init = FALSE;
+    size_t                              shared_chunks_info_array_num_entries = 0;
+    size_t                              num_send_requests = 0;
+    size_t                             *num_assigned_chunks_array = NULL;
+    size_t                              i, last_assigned_idx;
+    int                                *send_counts = NULL;
+    int                                *send_displacements = NULL;
+    int                                 scatter_recvcount_int;
+    int                                 mpi_rank, mpi_size, mpi_code;
+    herr_t                              ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    HDassert(io_info);
+    HDassert(type_info);
+    HDassert(fm);
+    HDassert(local_chunk_array_num_entries);
+
+    if ((mpi_rank = H5F_mpi_get_rank(io_info->dset->oloc.file)) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi rank")
+    if ((mpi_size = H5F_mpi_get_size(io_info->dset->oloc.file)) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_MPI, FAIL, "unable to obtain mpi size")
+
+    if (*local_chunk_array_num_entries)
+        if (NULL == (send_requests = (MPI_Request *) H5MM_malloc(*local_chunk_array_num_entries * sizeof(MPI_Request))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate send requests buffer")
+
+    if (NULL == (mem_iter = (H5S_sel_iter_t *) H5MM_malloc(sizeof(H5S_sel_iter_t))))
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate memory iterator")
+
+    /* Gather every rank's list of chunks to rank 0 to allow it to perform the redistribution operation. After this
+     * call, the gathered list will initially be sorted in increasing order of chunk offset in the file.
+     */
+    if (H5D__mpio_array_gatherv(local_chunk_array, *local_chunk_array_num_entries, sizeof(H5D_filtered_collective_io_info_t),
+            (void **) &shared_chunks_info_array, &shared_chunks_info_array_num_entries, mpi_size,
+            false, 0, io_info->comm, H5D__cmp_filtered_collective_io_info_entry) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGATHER, FAIL, "couldn't gather array")
+
+    /* Rank 0 redistributes any shared chunks to new owners as necessary */
+    if (mpi_rank == 0) {
+        if (NULL == (send_counts = (int *) H5MM_calloc((size_t) mpi_size * sizeof(int))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate send counts buffer")
+
+        if (NULL == (send_displacements = (int *) H5MM_malloc((size_t) mpi_size * sizeof(int))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate send displacements buffer")
+
+        if (NULL == (num_assigned_chunks_array = (size_t *) H5MM_calloc((size_t) mpi_size * sizeof(size_t))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate number of assigned chunks array")
+
+        for (i = 0; i < shared_chunks_info_array_num_entries;) {
+            H5D_filtered_collective_io_info_t chunk_entry;
+            haddr_t                           last_seen_addr = shared_chunks_info_array[i].chunk_states.chunk_current.offset;
+            size_t                            set_begin_index = i;
+            size_t                            num_writers = 0;
+            int                               new_chunk_owner = shared_chunks_info_array[i].owners.original_owner;
+
+            /* Process each set of duplicate entries caused by another process writing to the same chunk */
+            do {
+                chunk_entry = shared_chunks_info_array[i];
+
+                send_counts[chunk_entry.owners.original_owner] += (int) sizeof(chunk_entry);
+
+                /* The new owner of the chunk is determined by the process
+                 * writing to the chunk which currently has the least amount
+                 * of chunks assigned to it
+                 */
+                if (num_assigned_chunks_array[chunk_entry.owners.original_owner] < num_assigned_chunks_array[new_chunk_owner])
+                    new_chunk_owner = chunk_entry.owners.original_owner;
+
+                num_writers++;
+            } while (++i < shared_chunks_info_array_num_entries && shared_chunks_info_array[i].chunk_states.chunk_current.offset == last_seen_addr);
+
+            /* Set all of the chunk entries' "new_owner" fields */
+            for (; set_begin_index < i; set_begin_index++) {
+                shared_chunks_info_array[set_begin_index].owners.new_owner = new_chunk_owner;
+                shared_chunks_info_array[set_begin_index].num_writers = num_writers;
+            } /* end for */
+
+            num_assigned_chunks_array[new_chunk_owner]++;
+        } /* end for */
+
+        /* Sort the new list in order of previous owner so that each original owner of a chunk
+         * entry gets that entry back, with the possibly newly-modified "new_owner" field
+         */
+        HDqsort(shared_chunks_info_array, shared_chunks_info_array_num_entries,
+                sizeof(H5D_filtered_collective_io_info_t), H5D__cmp_filtered_collective_io_info_entry_owner);
+
+        send_displacements[0] = 0;
+        for (i = 1; i < (size_t) mpi_size; i++)
+            send_displacements[i] = send_displacements[i - 1] + send_counts[i - 1];
+    } /* end if */
+
+    /* Scatter the segments of the list back to each process */
+    H5_CHECKED_ASSIGN(scatter_recvcount_int, int, *local_chunk_array_num_entries * sizeof(H5D_filtered_collective_io_info_t), size_t);
+    if (MPI_SUCCESS != (mpi_code = MPI_Scatterv(shared_chunks_info_array, send_counts, send_displacements,
+            MPI_BYTE, local_chunk_array, scatter_recvcount_int, MPI_BYTE, 0, io_info->comm)))
+        HMPI_GOTO_ERROR(FAIL, "unable to scatter shared chunks info buffer", mpi_code)
+
+    if (shared_chunks_info_array) {
+        H5MM_free(shared_chunks_info_array);
+        shared_chunks_info_array = NULL;
+    } /* end if */
+
+    /* Now that the chunks have been redistributed, each process must send its modification data
+     * to the new owners of any of the chunks it previously possessed. Accordingly, each process
+     * must also issue asynchronous receives for any messages it may receive for each of the
+     * chunks it is assigned, in order to avoid potential deadlocking issues.
+     */
+    if (*local_chunk_array_num_entries)
+        if (NULL == (mod_data = (unsigned char **) H5MM_malloc(*local_chunk_array_num_entries * sizeof(unsigned char *))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate modification data buffer array")
+
+    for (i = 0, last_assigned_idx = 0; i < *local_chunk_array_num_entries; i++) {
+        H5D_filtered_collective_io_info_t *chunk_entry = &local_chunk_array[i];
+
+        if (mpi_rank != chunk_entry->owners.new_owner) {
+            H5D_chunk_info_t *chunk_info = NULL;
+            unsigned char    *mod_data_p = NULL;
+            hssize_t          iter_nelmts;
+            size_t            mod_data_size;
+
+            /* Look up the chunk and get its file and memory dataspaces */
+            if (NULL == (chunk_info = (H5D_chunk_info_t *) H5SL_search(fm->sel_chunks, &chunk_entry->index)))
+                HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, FAIL, "can't locate chunk in skip list")
+
+            /* Determine size of serialized chunk file dataspace, plus the size of
+             * the data being written
+             */
+            if (H5S_encode(chunk_info->fspace, &mod_data_p, &mod_data_size) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTENCODE, FAIL, "unable to get encoded dataspace size")
+
+            if ((iter_nelmts = H5S_GET_SELECT_NPOINTS(chunk_info->mspace)) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
+
+            mod_data_size += (size_t) iter_nelmts * type_info->src_type_size;
+
+            if (NULL == (mod_data[num_send_requests] = (unsigned char *) H5MM_malloc(mod_data_size)))
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate chunk modification send buffer")
+
+            /* Serialize the chunk's file dataspace into the buffer */
+            mod_data_p = mod_data[num_send_requests];
+            if (H5S_encode(chunk_info->fspace, &mod_data_p, &mod_data_size) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTENCODE, FAIL, "unable to encode dataspace")
+
+            /* Intialize iterator for memory selection */
+            if (H5S_select_iter_init(mem_iter, chunk_info->mspace, type_info->src_type_size) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize memory selection information")
+            mem_iter_init = TRUE;
+
+            /* Collect the modification data into the buffer */
+            if(!H5D__gather_mem(io_info->u.wbuf, chunk_info->mspace, mem_iter, (size_t)iter_nelmts, mod_data_p))
+                HGOTO_ERROR(H5E_IO, H5E_CANTGATHER, FAIL, "couldn't gather from write buffer")
+
+            /* Send modification data to new owner */
+            H5_CHECK_OVERFLOW(mod_data_size, size_t, int)
+            H5_CHECK_OVERFLOW(chunk_entry->index, hsize_t, int)
+            if (MPI_SUCCESS != (mpi_code = MPI_Isend(mod_data[num_send_requests], (int) mod_data_size, MPI_BYTE,
+                    chunk_entry->owners.new_owner, (int) chunk_entry->index, io_info->comm, &send_requests[num_send_requests])))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Isend failed", mpi_code)
+
+            if (mem_iter_init && H5S_SELECT_ITER_RELEASE(mem_iter) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "couldn't release memory selection iterator")
+            mem_iter_init = FALSE;
+
+            num_send_requests++;
+        } /* end if */
+        else {
+            /* Allocate all necessary buffers for an asynchronous receive operation */
+            if (chunk_entry->num_writers > 1) {
+                MPI_Message message;
+                MPI_Status  status;
+                size_t      j;
+
+                chunk_entry->async_info.num_receive_requests = (int) chunk_entry->num_writers - 1;
+                if (NULL == (chunk_entry->async_info.receive_requests_array = (MPI_Request *) H5MM_malloc((size_t) chunk_entry->async_info.num_receive_requests * sizeof(MPI_Request))))
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate async requests array")
+
+                if (NULL == (chunk_entry->async_info.receive_buffer_array = (unsigned char **) H5MM_malloc((size_t) chunk_entry->async_info.num_receive_requests * sizeof(unsigned char *))))
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate async receive buffers")
+
+                for (j = 0; j < chunk_entry->num_writers - 1; j++) {
+                    int count = 0;
+
+                    /* Probe for a particular message from any process, removing that message
+                     * from the receive queue in the process and allocating that much memory
+                     * for the asynchronous receive
+                     */
+                    if (MPI_SUCCESS != (mpi_code = MPI_Mprobe(MPI_ANY_SOURCE, (int) chunk_entry->index, io_info->comm, &message, &status)))
+                        HMPI_GOTO_ERROR(FAIL, "MPI_Mprobe failed", mpi_code)
+
+                    if (MPI_SUCCESS != (mpi_code = MPI_Get_count(&status, MPI_BYTE, &count)))
+                        HMPI_GOTO_ERROR(FAIL, "MPI_Get_count failed", mpi_code)
+
+                    HDassert(count >= 0);
+                    if (NULL == (chunk_entry->async_info.receive_buffer_array[j] = (unsigned char *) H5MM_malloc((size_t) count * sizeof(char *))))
+                        HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "unable to allocate modification data receive buffer")
+
+                    if (MPI_SUCCESS != (mpi_code = MPI_Imrecv(chunk_entry->async_info.receive_buffer_array[j], count, MPI_BYTE,
+                            &message, &chunk_entry->async_info.receive_requests_array[j])))
+                        HMPI_GOTO_ERROR(FAIL, "MPI_Imrecv failed", mpi_code)
+                } /* end for */
+            } /* end if */
+
+            local_chunk_array[last_assigned_idx++] = local_chunk_array[i];
+        } /* end else */
+    } /* end for */
+
+    *local_chunk_array_num_entries = last_assigned_idx;
+
+    /* Wait for all async send requests to complete before returning */
+    if (num_send_requests) {
+        if (NULL == (send_statuses = (MPI_Status *) H5MM_malloc(num_send_requests * sizeof(MPI_Status))))
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate send statuses buffer")
+
+        H5_CHECK_OVERFLOW(num_send_requests, size_t, int);
+        if (MPI_SUCCESS != (mpi_code = MPI_Waitall((int) num_send_requests, send_requests, send_statuses)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Waitall failed", mpi_code)
+    } /* end if */
+
+done:
+    /* Now that all async send requests have completed, free up the send
+     * buffers used in the async operations
+     */
+    for (i = 0; i < num_send_requests; i++) {
+        if (mod_data[i])
+            H5MM_free(mod_data[i]);
+    } /* end for */
+
+    if (send_requests)
+        H5MM_free(send_requests);
+    if (send_statuses)
+        H5MM_free(send_statuses);
+    if (send_counts)
+        H5MM_free(send_counts);
+    if (send_displacements)
+        H5MM_free(send_displacements);
+    if (mod_data)
+        H5MM_free(mod_data);
+    if (mem_iter_init && H5S_SELECT_ITER_RELEASE(mem_iter) < 0)
+        HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "couldn't release selection iterator")
+    if (mem_iter)
+        H5MM_free(mem_iter);
+    if (num_assigned_chunks_array)
+        H5MM_free(num_assigned_chunks_array);
+    if (shared_chunks_info_array)
+        H5MM_free(shared_chunks_info_array);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__chunk_redistribute_shared_chunks() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5D__mpio_filtered_collective_write_type
+ *
+ * Purpose:     Constructs a MPI derived datatype for both the memory and
+ *              the file for a collective write of filtered chunks. The
+ *              datatype contains the offsets in the file and the locations
+ *              of the filtered chunk data buffers.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Jordan Henderson
+ *              Tuesday, November 22, 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__mpio_filtered_collective_write_type(H5D_filtered_collective_io_info_t *chunk_list,
+    size_t num_entries, MPI_Datatype *new_mem_type, hbool_t *mem_type_derived,
+    MPI_Datatype *new_file_type, hbool_t *file_type_derived)
+{
+    MPI_Aint *write_buf_array = NULL;   /* Relative displacements of filtered chunk data buffers */
+    MPI_Aint *file_offset_array = NULL; /* Chunk offsets in the file */
+    int      *length_array = NULL;      /* Filtered Chunk lengths */
+    herr_t    ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    HDassert(chunk_list);
+    HDassert(new_mem_type);
+    HDassert(mem_type_derived);
+    HDassert(new_file_type);
+    HDassert(file_type_derived);
+
+    if (num_entries > 0) {
+        size_t i;
+        int    mpi_code;
+        void  *base_buf;
+
+        H5_CHECK_OVERFLOW(num_entries, size_t, int);
+
+        /* Allocate arrays */
+        if (NULL == (length_array = (int *) H5MM_malloc((size_t) num_entries * sizeof(int))))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "memory allocation failed for filtered collective write length array")
+        if (NULL == (write_buf_array = (MPI_Aint *) H5MM_malloc((size_t) num_entries * sizeof(MPI_Aint))))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "memory allocation failed for filtered collective write buf length array")
+        if (NULL == (file_offset_array = (MPI_Aint *) H5MM_malloc((size_t) num_entries * sizeof(MPI_Aint))))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "memory allocation failed for collective write offset array")
+
+        /* Ensure the list is sorted in ascending order of offset in the file */
+        HDqsort(chunk_list, num_entries, sizeof(H5D_filtered_collective_io_info_t), H5D__cmp_filtered_collective_io_info_entry);
+
+        base_buf = chunk_list[0].buf;
+        for (i = 0; i < num_entries; i++) {
+            /* Set up the offset in the file, the length of the chunk data, and the relative
+             * displacement of the chunk data write buffer
+             */
+            file_offset_array[i] = (MPI_Aint) chunk_list[i].chunk_states.new_chunk.offset;
+            length_array[i] = (int) chunk_list[i].chunk_states.new_chunk.length;
+            write_buf_array[i] = (MPI_Aint) chunk_list[i].buf - (MPI_Aint) base_buf;
+        } /* end for */
+
+        /* Create memory MPI type */
+        if (MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed((int) num_entries, length_array, write_buf_array, MPI_BYTE, new_mem_type)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed failed", mpi_code)
+        *mem_type_derived = TRUE;
+        if (MPI_SUCCESS != (mpi_code = MPI_Type_commit(new_mem_type)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+
+        /* Create file MPI type */
+        if (MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed((int) num_entries, length_array, file_offset_array, MPI_BYTE, new_file_type)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed failed", mpi_code)
+        *file_type_derived = TRUE;
+        if (MPI_SUCCESS != (mpi_code = MPI_Type_commit(new_file_type)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+    } /* end if */
+
+done:
+    if (write_buf_array)
+        H5MM_free(write_buf_array);
+    if (file_offset_array)
+        H5MM_free(file_offset_array);
+    if (length_array)
+        H5MM_free(length_array);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__mpio_filtered_collective_write_type() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5D__filtered_collective_chunk_entry_io
+ *
+ * Purpose:     Given an entry for a filtered chunk, performs the necessary
+ *              steps for updating the chunk data during a collective
+ *              write, or for reading the chunk from file during a
+ *              collective read.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Jordan Henderson
+ *              Wednesday, January 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5D__filtered_collective_chunk_entry_io(H5D_filtered_collective_io_info_t *chunk_entry,
+    const H5D_io_info_t *io_info, const H5D_type_info_t *type_info, const H5D_chunk_map_t *fm)
+{
+    H5D_chunk_info_t *chunk_info = NULL;
+    H5S_sel_iter_t   *mem_iter = NULL; /* Memory iterator for H5D__scatter_mem/H5D__gather_mem */
+    unsigned char    *mod_data = NULL; /* Chunk modification data sent by a process to a chunk's owner */
+    H5Z_EDC_t         err_detect;       /* Error detection info */
+    H5Z_cb_t          filter_cb;        /* I/O filter callback function */
+    unsigned          filter_mask = 0;
+    hssize_t          iter_nelmts;     /* Number of points to iterate over for the chunk IO operation */
+    hssize_t          extent_npoints;
+    hsize_t           true_chunk_size;
+    hbool_t           mem_iter_init = FALSE;
+    size_t            buf_size;
+    size_t            i;
+    H5S_t            *dataspace = NULL; /* Other process' dataspace for the chunk */
+    void             *tmp_gath_buf = NULL; /* Temporary gather buffer for owner of the chunk to gather into from
+                                            application write buffer before scattering out to the chunk data buffer */
+    int               mpi_code;
+    herr_t            ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    HDassert(chunk_entry);
+    HDassert(io_info);
+    HDassert(type_info);
+    HDassert(fm);
+
+    /* Retrieve filter settings from API context */
+    if(H5CX_get_err_detect(&err_detect) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get error detection info")
+    if(H5CX_get_filter_cb(&filter_cb) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get I/O filter callback function")
+
+    /* Look up the chunk and get its file and memory dataspaces */
+    if (NULL == (chunk_info = (H5D_chunk_info_t *) H5SL_search(fm->sel_chunks, &chunk_entry->index)))
+        HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, FAIL, "can't locate chunk in skip list")
+
+    if ((extent_npoints = H5S_GET_EXTENT_NPOINTS(chunk_info->fspace)) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
+    true_chunk_size = (hsize_t) extent_npoints * type_info->src_type_size;
+
+    /* If the size of the filtered chunk is larger than the number of points in the
+     * chunk file space extent times the datatype size, allocate enough space to hold the
+     * whole filtered chunk. Otherwise, allocate a buffer equal to the size of the
+     * chunk so that the unfiltering operation doesn't have to grow the buffer.
+     */
+    buf_size = MAX(chunk_entry->chunk_states.chunk_current.length, true_chunk_size);
+
+    if (NULL == (chunk_entry->buf = H5MM_malloc(buf_size)))
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate chunk data buffer")
+
+    /* If this is not a full chunk overwrite or this is a read operation, the chunk must be
+     * read from the file and unfiltered.
+     */
+    if(!chunk_entry->full_overwrite || io_info->op_type == H5D_IO_OP_READ) {
+        H5FD_mpio_xfer_t xfer_mode; /* Parallel transfer for this request */
+
+        chunk_entry->chunk_states.new_chunk.length = chunk_entry->chunk_states.chunk_current.length;
+
+        /* Currently, these chunk reads are done independently and will likely
+	 * cause issues with collective metadata reads enabled. In the future,
+	 * this should be refactored to use collective chunk reads - JTH */
+
+        /* Get the original state of parallel I/O transfer mode */
+        if(H5CX_get_io_xfer_mode(&xfer_mode) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
+
+        /* Change the xfer_mode to independent for handling the I/O */
+        if(H5CX_set_io_xfer_mode(H5FD_MPIO_INDEPENDENT) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set MPI-I/O transfer mode")
+
+        if(H5F_block_read(io_info->dset->oloc.file, H5FD_MEM_DRAW, chunk_entry->chunk_states.chunk_current.offset,
+                chunk_entry->chunk_states.new_chunk.length, chunk_entry->buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "unable to read raw data chunk")
+
+        /* Return to the original I/O transfer mode setting */
+        if(H5CX_set_io_xfer_mode(xfer_mode) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set MPI-I/O transfer mode")
+
+        if(H5Z_pipeline(&io_info->dset->shared->dcpl_cache.pline, H5Z_FLAG_REVERSE,
+                &filter_mask, err_detect, filter_cb, (size_t *)&chunk_entry->chunk_states.new_chunk.length,
+                &buf_size, &chunk_entry->buf) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTFILTER, FAIL, "couldn't unfilter chunk for modifying")
+    } /* end if */
+    else {
+        chunk_entry->chunk_states.new_chunk.length = true_chunk_size;
+    } /* end else */
+
+    /* Initialize iterator for memory selection */
+    if (NULL == (mem_iter = (H5S_sel_iter_t *) H5MM_malloc(sizeof(H5S_sel_iter_t))))
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate memory iterator")
+
+    if (H5S_select_iter_init(mem_iter, chunk_info->mspace, type_info->src_type_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize memory selection information")
+    mem_iter_init = TRUE;
+
+    if ((iter_nelmts = H5S_GET_SELECT_NPOINTS(chunk_info->mspace)) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
+
+    /* If this is a read operation, scatter the read chunk data to the user's buffer.
+     *
+     * If this is a write operation, update the chunk data buffer with the modifications
+     * from the current process, then apply any modifications from other processes. Finally,
+     * filter the newly-updated chunk.
+     */
+    switch (io_info->op_type) {
+        case H5D_IO_OP_READ:
+            if (H5D__scatter_mem(chunk_entry->buf, chunk_info->mspace, mem_iter, (size_t)iter_nelmts, io_info->u.rbuf) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "couldn't scatter to read buffer")
+            break;
+
+        case H5D_IO_OP_WRITE:
+            if (NULL == (tmp_gath_buf = H5MM_malloc((hsize_t) iter_nelmts * type_info->src_type_size)))
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "couldn't allocate temporary gather buffer")
+
+            /* Gather modification data from the application write buffer into a temporary buffer */
+            if(!H5D__gather_mem(io_info->u.wbuf, chunk_info->mspace, mem_iter, (size_t)iter_nelmts, tmp_gath_buf))
+                HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "couldn't gather from write buffer")
+
+            if (H5S_SELECT_ITER_RELEASE(mem_iter) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "couldn't release selection iterator")
+            mem_iter_init = FALSE;
+
+            /* Initialize iterator for file selection */
+            if (H5S_select_iter_init(mem_iter, chunk_info->fspace, type_info->dst_type_size) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize file selection information")
+            mem_iter_init = TRUE;
+
+            if ((iter_nelmts = H5S_GET_SELECT_NPOINTS(chunk_info->fspace)) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
+
+            /* Scatter the owner's modification data into the chunk data buffer according to
+             * the file space.
+             */
+            if(H5D__scatter_mem(tmp_gath_buf, chunk_info->fspace, mem_iter, (size_t)iter_nelmts, chunk_entry->buf) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "couldn't scatter to chunk data buffer")
+
+            if (H5S_SELECT_ITER_RELEASE(mem_iter) < 0)
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "couldn't release selection iterator")
+            mem_iter_init = FALSE;
+
+            if (MPI_SUCCESS != (mpi_code = MPI_Waitall(chunk_entry->async_info.num_receive_requests,
+                    chunk_entry->async_info.receive_requests_array, MPI_STATUSES_IGNORE)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Waitall failed", mpi_code)
+
+            /* For each asynchronous receive call previously posted, receive the chunk modification
+             * buffer from another rank and update the chunk data
+             */
+            for (i = 0; i < (size_t) chunk_entry->async_info.num_receive_requests; i++) {
+                const unsigned char *mod_data_p;
+
+                /* Decode the process' chunk file dataspace */
+                mod_data_p = chunk_entry->async_info.receive_buffer_array[i];
+                if (NULL == (dataspace = H5S_decode(&mod_data_p)))
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTDECODE, FAIL, "unable to decode dataspace")
+
+                if (H5S_select_iter_init(mem_iter, dataspace, type_info->dst_type_size) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize memory selection information")
+                mem_iter_init = TRUE;
+
+                if ((iter_nelmts = H5S_GET_SELECT_NPOINTS(dataspace)) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
+
+                /* Update the chunk data with the received modification data */
+                if(H5D__scatter_mem(mod_data_p, dataspace, mem_iter, (size_t) iter_nelmts, chunk_entry->buf) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "couldn't scatter to write buffer")
+
+                if (H5S_SELECT_ITER_RELEASE(mem_iter) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "couldn't release selection iterator")
+                mem_iter_init = FALSE;
+                if (dataspace) {
+                    if (H5S_close(dataspace) < 0)
+                        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTFREE, FAIL, "can't close dataspace")
+                    dataspace = NULL;
+                }
+                H5MM_free(chunk_entry->async_info.receive_buffer_array[i]);
+            } /* end for */
+
+            /* Filter the chunk */
+            if(H5Z_pipeline(&io_info->dset->shared->dcpl_cache.pline, 0, &filter_mask,
+                    err_detect, filter_cb, (size_t *)&chunk_entry->chunk_states.new_chunk.length,
+                    &buf_size, &chunk_entry->buf) < 0)
+                HGOTO_ERROR(H5E_PLINE, H5E_CANTFILTER, FAIL, "output pipeline failed")
+
+#if H5_SIZEOF_SIZE_T > 4
+            /* Check for the chunk expanding too much to encode in a 32-bit value */
+            if (chunk_entry->chunk_states.new_chunk.length > ((size_t) 0xffffffff))
+                HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, FAIL, "chunk too large for 32-bit length")
+#endif
+            break;
+
+        default:
+            HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "invalid I/O operation")
+    } /* end switch */
+
+done:
+    if (chunk_entry->async_info.receive_buffer_array)
+        H5MM_free(chunk_entry->async_info.receive_buffer_array);
+    if (chunk_entry->async_info.receive_requests_array)
+        H5MM_free(chunk_entry->async_info.receive_requests_array);
+    if (mod_data)
+        H5MM_free(mod_data);
+    if (tmp_gath_buf)
+        H5MM_free(tmp_gath_buf);
+    if (mem_iter_init && H5S_SELECT_ITER_RELEASE(mem_iter) < 0)
+        HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "couldn't release selection iterator")
+    if (mem_iter)
+        H5MM_free(mem_iter);
+    if (dataspace)
+        if (H5S_close(dataspace) < 0)
+            HDONE_ERROR(H5E_DATASPACE, H5E_CANTFREE, FAIL, "can't close dataspace")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__filtered_collective_chunk_entry_io() */
 #endif  /* H5_HAVE_PARALLEL */
 
diff --git a/src/H5Dnone.c b/src/H5Dnone.c
index 0cadac2..be421b6 100644
--- a/src/H5Dnone.c
+++ b/src/H5Dnone.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer: 	Vailin Choi <vchoi@hdfgroup.org>
@@ -147,7 +145,7 @@ H5D__none_idx_create(const H5D_chk_idx_info_t *idx_info)
     nbytes = idx_info->layout->max_nchunks * idx_info->layout->size;
 
     /* Allocate space for max dataset chunks */
-    addr = H5MF_alloc(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, nbytes);
+    addr = H5MF_alloc(idx_info->f, H5FD_MEM_DRAW, nbytes);
     if(!H5F_addr_defined(addr))
 	HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "file allocation failed")
 
@@ -357,7 +355,7 @@ H5D__none_idx_delete(const H5D_chk_idx_info_t *idx_info)
 
     /* chunk size * max # of chunks */
     nbytes = idx_info->layout->max_nchunks * idx_info->layout->size;
-    if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, idx_info->storage->idx_addr, nbytes) < 0)
+    if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->storage->idx_addr, nbytes) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, H5_ITER_ERROR, "unable to free dataset chunks")
 
     idx_info->storage->idx_addr = HADDR_UNDEF;
@@ -403,14 +401,14 @@ H5D__none_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     HDassert(idx_info_dst->storage);
 
     /* Set copied metadata tag */
-    H5_BEGIN_TAG(idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL);
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Allocate dataset chunks in the dest. file */
     if(H5D__none_idx_create(idx_info_dst) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize chunked storage")
 
     /* Reset metadata tag */
-    H5_END_TAG(FAIL);
+    H5_END_TAG
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Doh.c b/src/H5Doh.c
index 5cdf4bc..f8ce69f 100644
--- a/src/H5Doh.c
+++ b/src/H5Doh.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -25,6 +23,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Datasets				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free lists                           */
@@ -47,15 +46,13 @@
 /********************/
 static void *H5O__dset_get_copy_file_udata(void);
 static void H5O__dset_free_copy_file_udata(void *);
-static htri_t H5O__dset_isa(H5O_t *loc);
-static hid_t H5O__dset_open(const H5G_loc_t *obj_loc, hid_t lapl_id,
-    hid_t dxpl_id, hbool_t app_ref);
-static void *H5O__dset_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc,
-    hid_t dxpl_id);
+static htri_t H5O__dset_isa(const H5O_t *loc);
+static hid_t H5O__dset_open(const H5G_loc_t *obj_loc, hbool_t app_ref);
+static void *H5O__dset_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc);
 static H5O_loc_t *H5O__dset_get_oloc(hid_t obj_id);
-static herr_t H5O__dset_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh,
+static herr_t H5O__dset_bh_info(const H5O_loc_t *loc, H5O_t *oh,
     H5_ih_info_t *bh_info);
-static herr_t H5O__dset_flush(void *_obj_ptr, hid_t dxpl_id);
+static herr_t H5O__dset_flush(void *_obj_ptr);
 
 
 /*********************/
@@ -150,7 +147,7 @@ H5O__dset_free_copy_file_udata(void *_udata)
 
     /* Release copy of dataset's datatype, if it was set */
     if(udata->src_dtype)
-        H5T_close(udata->src_dtype);
+        H5T_close_real(udata->src_dtype);
 
     /* Release copy of dataset's filter pipeline, if it was set */
     if(udata->common.src_pline)
@@ -181,7 +178,7 @@ H5O__dset_free_copy_file_udata(void *_udata)
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O__dset_isa(H5O_t *oh)
+H5O__dset_isa(const H5O_t *oh)
 {
     htri_t	exists;                 /* Flag if header message of interest exists */
     htri_t	ret_value = TRUE;       /* Return value */
@@ -221,10 +218,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static hid_t
-H5O__dset_open(const H5G_loc_t *obj_loc, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref)
+H5O__dset_open(const H5G_loc_t *obj_loc, hbool_t app_ref)
 {
     H5D_t  *dset = NULL;                /* Dataset opened */
-    htri_t  isdapl;                     /* lapl_id is a dapl */
     hid_t   dapl_id;                    /* dapl to use to open this dataset */
     hid_t   ret_value = H5I_INVALID_HID;        /* Return value */
 
@@ -232,30 +228,41 @@ H5O__dset_open(const H5G_loc_t *obj_loc, hid_t lapl_id, hid_t dxpl_id, hbool_t a
 
     HDassert(obj_loc);
 
-    /* If the lapl passed in is a dapl, use it.  Otherwise, use the default dapl */
-    if(lapl_id == H5P_DEFAULT)
-        isdapl = FALSE;
-    else
-        if((isdapl = H5P_isa_class(lapl_id, H5P_DATASET_ACCESS)) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTCOMPARE, FAIL, "unable to compare property list classes")
-
-    if(isdapl)
-        dapl_id = lapl_id;
-    else
+    /* Get the LAPL (which is a superclass of DAPLs) from the API context, but
+     * if it's the default link access property list or a custom link access
+     * property list but not a dataset access property list, use the default
+     * dataset access property list instead.  (Since LAPLs don't have the
+     * additional properties that DAPLs have)
+     */
+    dapl_id = H5CX_get_lapl();
+    if(dapl_id == H5P_LINK_ACCESS_DEFAULT)
         dapl_id = H5P_DATASET_ACCESS_DEFAULT;
+    else {
+        htri_t is_lapl, is_dapl;        /* Class of LAPL from API context */
+
+        /* Check class of LAPL from API context */
+        if((is_lapl = H5P_isa_class(dapl_id, H5P_LINK_ACCESS)) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, H5I_INVALID_HID, "unable to get LAPL status")
+        if((is_dapl = H5P_isa_class(dapl_id, H5P_DATASET_ACCESS)) < 0)
+            HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, H5I_INVALID_HID, "unable to get DAPL status")
+
+        /* Switch to default DAPL if not an actual DAPL in the API context */
+        if(!is_dapl && is_lapl)
+            dapl_id = H5P_DATASET_ACCESS_DEFAULT;
+    } /* end else */
 
     /* Open the dataset */
-    if(NULL == (dset = H5D_open(obj_loc, dapl_id, dxpl_id)))
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open dataset")
+    if(NULL == (dset = H5D_open(obj_loc, dapl_id)))
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open dataset")
 
     /* Register an ID for the dataset */
     if((ret_value = H5I_register(H5I_DATASET, dset, app_ref)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataset")
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register dataset")
 
 done:
     if(ret_value < 0)
         if(dset && H5D_close(dset) < 0)
-            HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "unable to release dataset")
+            HDONE_ERROR(H5E_DATASET, H5E_CLOSEERROR, H5I_INVALID_HID, "unable to release dataset")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O__dset_open() */
@@ -275,7 +282,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O__dset_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id)
+H5O__dset_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc)
 {
     H5D_obj_create_t *crt_info = (H5D_obj_create_t *)_crt_info; /* Dataset creation parameters */
     H5D_t *dset = NULL;         /* New dataset created */
@@ -289,7 +296,7 @@ H5O__dset_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id)
     HDassert(obj_loc);
 
     /* Create the the dataset */
-    if(NULL == (dset = H5D__create(f, crt_info->type_id, crt_info->space, crt_info->dcpl_id, crt_info->dapl_id, dxpl_id)))
+    if(NULL == (dset = H5D__create(f, crt_info->type_id, crt_info->space, crt_info->dcpl_id, crt_info->dapl_id)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, NULL, "unable to create dataset")
 
     /* Set up the new dataset's location */
@@ -359,7 +366,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O__dset_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *bh_info)
+H5O__dset_bh_info(const H5O_loc_t *loc, H5O_t *oh, H5_ih_info_t *bh_info)
 {
     H5O_layout_t        layout;         	/* Data storage layout message */
     H5O_efl_t           efl;			/* External File List message */
@@ -378,14 +385,14 @@ H5O__dset_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *
     HDassert(bh_info);
 
     /* Get the layout message from the object header */
-    if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_LAYOUT_ID, &layout))
+    if(NULL == H5O_msg_read_oh(loc->file, oh, H5O_LAYOUT_ID, &layout))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't find layout message")
     layout_read = TRUE;
 
     /* Check for chunked dataset storage */
     if(layout.type == H5D_CHUNKED && H5D__chunk_is_space_alloc(&layout.storage)) {
         /* Get size of chunk index */
-        if(H5D__chunk_bh_info(loc, dxpl_id, oh, &layout, &(bh_info->index_size)) < 0)
+        if(H5D__chunk_bh_info(loc, oh, &layout, &(bh_info->index_size)) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't determine chunked dataset btree info")
     } /* end if */
     else if(layout.type == H5D_VIRTUAL
@@ -393,7 +400,7 @@ H5O__dset_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *
         size_t virtual_heap_size;
 
         /* Get size of global heap object for virtual dataset */
-        if(H5HG_get_obj_size(loc->file, dxpl_id, &(layout.storage.u.virt.serial_list_hobjid), &virtual_heap_size) < 0)
+        if(H5HG_get_obj_size(loc->file, &(layout.storage.u.virt.serial_list_hobjid), &virtual_heap_size) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get global heap size for virtual dataset mapping")
 
         /* Return heap size */
@@ -409,12 +416,12 @@ H5O__dset_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *
         HDmemset(&efl, 0, sizeof(efl));
 
 	/* Get External File List message from the object header */
-	if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_EFL_ID, &efl))
+	if(NULL == H5O_msg_read_oh(loc->file, oh, H5O_EFL_ID, &efl))
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't find EFL message")
         efl_read = TRUE;
 
 	/* Get size of local heap for EFL message's file list */
-	if(H5D__efl_bh_info(loc->file, dxpl_id, &efl, &(bh_info->heap_size)) < 0)
+	if(H5D__efl_bh_info(loc->file, &efl, &(bh_info->heap_size)) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't determine EFL heap info")
     } /* end if */
 
@@ -443,7 +450,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O__dset_flush(void *_obj_ptr, hid_t dxpl_id)
+H5O__dset_flush(void *_obj_ptr)
 {
     H5D_t *dset = (H5D_t *)_obj_ptr;	/* Pointer to dataset object */
     H5O_type_t obj_type;              	/* Type of object at location */
@@ -455,12 +462,12 @@ H5O__dset_flush(void *_obj_ptr, hid_t dxpl_id)
     HDassert(&dset->oloc);
 
     /* Check that the object found is the correct type */
-    if(H5O_obj_type(&dset->oloc, &obj_type, dxpl_id) < 0)
+    if(H5O_obj_type(&dset->oloc, &obj_type) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get object type")
     if(obj_type != H5O_TYPE_DATASET)
         HGOTO_ERROR(H5E_DATASET, H5E_BADTYPE, FAIL, "not a dataset")
 
-    if(H5D__flush_real(dset, dxpl_id) < 0)
+    if(H5D__flush_real(dset) < 0)
         HDONE_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to flush cached dataset info")
 
 done:
diff --git a/src/H5Dpkg.h b/src/H5Dpkg.h
index f54a9f2..126a3c0 100644
--- a/src/H5Dpkg.h
+++ b/src/H5Dpkg.h
@@ -5,21 +5,19 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		Monday, April 14, 2003
+ * Programmer:    Quincey Koziol <koziol@ncsa.uiuc.edu>
+ *        Monday, April 14, 2003
  *
- * Purpose:	This file contains declarations which are visible only within
- *		the H5D package.  Source files outside the H5D package should
- *		include H5Dprivate.h instead.
+ * Purpose:    This file contains declarations which are visible only within
+ *        the H5D package.  Source files outside the H5D package should
+ *        include H5Dprivate.h instead.
  */
 #if !(defined H5D_FRIEND || defined H5D_MODULE)
 #error "Do not include this file outside the H5D package!"
@@ -32,12 +30,12 @@
 #include "H5Dprivate.h"
 
 /* Other private headers needed by this file */
-#include "H5ACprivate.h"	/* Metadata cache			*/
-#include "H5B2private.h"        /* v2 B-trees                           */
-#include "H5Fprivate.h"		/* File access				*/
-#include "H5Gprivate.h"		/* Groups 			  	*/
-#include "H5SLprivate.h"	/* Skip lists				*/
-#include "H5Tprivate.h"		/* Datatypes         			*/
+#include "H5ACprivate.h"        /* Metadata cache            */
+#include "H5B2private.h"        /* v2 B-trees                */
+#include "H5Fprivate.h"         /* File access               */
+#include "H5Gprivate.h"         /* Groups                    */
+#include "H5SLprivate.h"        /* Skip lists                */
+#include "H5Tprivate.h"         /* Datatypes                 */
 
 /**************************/
 /* Package Private Macros */
@@ -47,19 +45,13 @@
 #define H5D_MINHDR_SIZE 256
 
 /* [Simple] Macro to construct a H5D_io_info_t from it's components */
-#define H5D_BUILD_IO_INFO_WRT(io_info, ds, dxpl_c, dxpl_m, dxpl_r, str, buf)    \
+#define H5D_BUILD_IO_INFO_WRT(io_info, ds, str, buf)                    \
     (io_info)->dset = ds;                                               \
-    (io_info)->dxpl_cache = dxpl_c;                                     \
-    (io_info)->raw_dxpl_id = dxpl_r;                                    \
-    (io_info)->md_dxpl_id = dxpl_m;                                     \
     (io_info)->store = str;                                             \
     (io_info)->op_type = H5D_IO_OP_WRITE;                               \
     (io_info)->u.wbuf = buf
-#define H5D_BUILD_IO_INFO_RD(io_info, ds, dxpl_c, dxpl_m, dxpl_r, str, buf) \
+#define H5D_BUILD_IO_INFO_RD(io_info, ds, str, buf)                     \
     (io_info)->dset = ds;                                               \
-    (io_info)->dxpl_cache = dxpl_c;                                     \
-    (io_info)->raw_dxpl_id = dxpl_r;                                    \
-    (io_info)->md_dxpl_id = dxpl_m;                                     \
     (io_info)->store = str;                                             \
     (io_info)->op_type = H5D_IO_OP_READ;                                \
     (io_info)->u.rbuf = buf
@@ -72,22 +64,22 @@
 /* See H5O_layout_chunk_t */
 
 /* Fixed array creation values */
-#define H5D_FARRAY_CREATE_PARAM_SIZE		1	/* Size of the creation parameters in bytes */
-#define H5D_FARRAY_MAX_DBLK_PAGE_NELMTS_BITS 	10  	/* i.e. 1024 elements per data block page */
+#define H5D_FARRAY_CREATE_PARAM_SIZE           1    /* Size of the creation parameters in bytes */
+#define H5D_FARRAY_MAX_DBLK_PAGE_NELMTS_BITS   10   /* i.e. 1024 elements per data block page */
 
 /* Extensible array creation values */
-#define H5D_EARRAY_CREATE_PARAM_SIZE		5	/* Size of the creation parameters in bytes */
-#define H5D_EARRAY_MAX_NELMTS_BITS         	32	/* i.e. 4 giga-elements */
-#define H5D_EARRAY_IDX_BLK_ELMTS           	4
-#define H5D_EARRAY_SUP_BLK_MIN_DATA_PTRS   	4
-#define H5D_EARRAY_DATA_BLK_MIN_ELMTS      	16
-#define H5D_EARRAY_MAX_DBLOCK_PAGE_NELMTS_BITS 	10 	/* i.e. 1024 elements per data block page */
+#define H5D_EARRAY_CREATE_PARAM_SIZE           5    /* Size of the creation parameters in bytes */
+#define H5D_EARRAY_MAX_NELMTS_BITS             32   /* i.e. 4 giga-elements */
+#define H5D_EARRAY_IDX_BLK_ELMTS               4
+#define H5D_EARRAY_SUP_BLK_MIN_DATA_PTRS       4
+#define H5D_EARRAY_DATA_BLK_MIN_ELMTS          16
+#define H5D_EARRAY_MAX_DBLOCK_PAGE_NELMTS_BITS     10     /* i.e. 1024 elements per data block page */
 
 /* v2 B-tree creation values for raw meta_size */
-#define H5D_BT2_CREATE_PARAM_SIZE	6		/* Size of the creation parameters in bytes */
-#define H5D_BT2_NODE_SIZE       	2048
-#define H5D_BT2_SPLIT_PERC      	100
-#define H5D_BT2_MERGE_PERC      	40
+#define H5D_BT2_CREATE_PARAM_SIZE   6        /* Size of the creation parameters in bytes */
+#define H5D_BT2_NODE_SIZE           2048
+#define H5D_BT2_SPLIT_PERC          100
+#define H5D_BT2_MERGE_PERC          40
 
 
 /****************************/
@@ -99,23 +91,23 @@ typedef struct H5D_type_info_t {
     /* Initial values */
     const H5T_t *mem_type;              /* Pointer to memory datatype */
     const H5T_t *dset_type;             /* Pointer to dataset datatype */
-    H5T_path_t *tpath;                  /* Datatype conversion path */
+    H5T_path_t  *tpath;                 /* Datatype conversion path */
     hid_t src_type_id;                  /* Source datatype ID */
     hid_t dst_type_id;                  /* Destination datatype ID */
 
     /* Computed/derived values */
-    size_t src_type_size;		/* Size of source type	*/
-    size_t dst_type_size;	        /* Size of destination type */
-    size_t max_type_size;	        /* Size of largest source/destination type */
-    hbool_t is_conv_noop;               /* Whether the type conversion is a NOOP */
-    hbool_t is_xform_noop;              /* Whether the data transform is a NOOP */
+    size_t  src_type_size;               /* Size of source type */
+    size_t  dst_type_size;               /* Size of destination type */
+    size_t  max_type_size;               /* Size of largest source/destination type */
+    hbool_t is_conv_noop;                /* Whether the type conversion is a NOOP */
+    hbool_t is_xform_noop;               /* Whether the data transform is a NOOP */
     const H5T_subset_info_t *cmpd_subset;   /* Info related to the compound subset conversion functions */
-    H5T_bkg_t need_bkg;		        /* Type of background buf needed */
-    size_t request_nelmts;		/* Requested strip mine	*/
-    uint8_t *tconv_buf;	                /* Datatype conv buffer	*/
-    hbool_t tconv_buf_allocated;        /* Whether the type conversion buffer was allocated */
-    uint8_t *bkg_buf;	                /* Background buffer	*/
-    hbool_t bkg_buf_allocated;          /* Whether the background buffer was allocated */
+    H5T_bkg_t need_bkg;                  /* Type of background buf needed */
+    size_t   request_nelmts;             /* Requested strip mine */
+    uint8_t *tconv_buf;                  /* Datatype conv buffer */
+    hbool_t  tconv_buf_allocated;        /* Whether the type conversion buffer was allocated */
+    uint8_t *bkg_buf;                    /* Background buffer */
+    hbool_t  bkg_buf_allocated;          /* Whether the background buffer was allocated */
 } H5D_type_info_t;
 
 /* Forward declaration of structs used below */
@@ -124,7 +116,7 @@ struct H5D_chunk_map_t;
 
 /* Function pointers for I/O on particular types of dataset layouts */
 typedef herr_t (*H5D_layout_construct_func_t)(H5F_t *f, H5D_t *dset);
-typedef herr_t (*H5D_layout_init_func_t)(H5F_t *f, hid_t dxpl_id, const H5D_t *dset,
+typedef herr_t (*H5D_layout_init_func_t)(H5F_t *f, const H5D_t *dset,
     hid_t dapl_id);
 typedef hbool_t (*H5D_layout_is_space_alloc_func_t)(const H5O_storage_t *storage);
 typedef herr_t (*H5D_layout_io_init_func_t)(const struct H5D_io_info_t *io_info,
@@ -143,9 +135,9 @@ typedef ssize_t (*H5D_layout_readvv_func_t)(const struct H5D_io_info_t *io_info,
 typedef ssize_t (*H5D_layout_writevv_func_t)(const struct H5D_io_info_t *io_info,
     size_t dset_max_nseq, size_t *dset_curr_seq, size_t dset_len_arr[], hsize_t dset_offset_arr[],
     size_t mem_max_nseq, size_t *mem_curr_seq, size_t mem_len_arr[], hsize_t mem_offset_arr[]);
-typedef herr_t (*H5D_layout_flush_func_t)(H5D_t *dataset, hid_t dxpl_id);
+typedef herr_t (*H5D_layout_flush_func_t)(H5D_t *dataset);
 typedef herr_t (*H5D_layout_io_term_func_t)(const struct H5D_chunk_map_t *cm);
-typedef herr_t (*H5D_layout_dest_func_t)(H5D_t *dataset, hid_t dxpl_id);
+typedef herr_t (*H5D_layout_dest_func_t)(H5D_t *dataset);
 
 /* Typedef for grouping layout I/O routines */
 typedef struct H5D_layout_ops_t {
@@ -193,13 +185,13 @@ typedef struct {
 } H5D_chunk_storage_t;
 
 typedef struct {
-    void *buf;              /* Buffer for compact dataset */
+    void    *buf;           /* Buffer for compact dataset */
     hbool_t *dirty;         /* Pointer to dirty flag to mark */
 } H5D_compact_storage_t;
 
 typedef union H5D_storage_t {
     H5D_contig_storage_t contig; /* Contiguous information for dataset */
-    H5D_chunk_storage_t chunk;  /* Chunk information for dataset */
+    H5D_chunk_storage_t  chunk;  /* Chunk information for dataset */
     H5D_compact_storage_t compact; /* Compact information for dataset */
     H5O_efl_t   efl;            /* External file list information for dataset */
 } H5D_storage_t;
@@ -212,20 +204,9 @@ typedef enum H5D_io_op_type_t {
 
 typedef struct H5D_io_info_t {
     const H5D_t *dset;          /* Pointer to dataset being operated on */
-#ifndef H5_HAVE_PARALLEL
-    const
-#endif /* H5_HAVE_PARALLEL */
-        H5D_dxpl_cache_t *dxpl_cache; /* Pointer to cached DXPL info */
-    hid_t raw_dxpl_id;          /* Original DXPL ID */
-    hid_t md_dxpl_id;           /* metadata dxpl needed for parallel HDF5 */
 #ifdef H5_HAVE_PARALLEL
     MPI_Comm comm;              /* MPI communicator for file */
     hbool_t using_mpi_vfd;      /* Whether the file is using an MPI-based VFD */
-    struct {
-        H5FD_mpio_xfer_t xfer_mode; /* Parallel transfer for this request (H5D_XFER_IO_XFER_MODE_NAME) */
-        H5FD_mpio_collective_opt_t coll_opt_mode; /* Parallel transfer with independent IO or collective IO with this mode */
-        H5D_io_ops_t io_ops;    /* I/O operation function pointers */
-    } orig;
 #endif /* H5_HAVE_PARALLEL */
     H5D_storage_t *store;       /* Dataset storage info */
     H5D_layout_ops_t layout_ops;    /* Dataset layout I/O operation function pointers */
@@ -245,7 +226,6 @@ typedef struct H5D_io_info_t {
 /* Typedef for chunked dataset index operation info */
 typedef struct H5D_chk_idx_info_t {
     H5F_t *f;                   /* File pointer for operation */
-    hid_t dxpl_id;              /* DXPL ID for operation */
     const H5O_pline_t *pline;   /* I/O pipeline info */
     H5O_layout_chunk_t *layout;           /* Chunk layout description */
     H5O_storage_chunk_t *storage;         /* Chunk storage description */
@@ -263,10 +243,10 @@ typedef struct H5D_chk_idx_info_t {
  * The chunk's file address, filter mask and size on disk are not key values.
  */
 typedef struct H5D_chunk_rec_t {
-    hsize_t	scaled[H5O_LAYOUT_NDIMS];	/* Logical offset to start */
-    uint32_t	nbytes;				/* Size of stored data	*/
-    uint32_t	filter_mask;			/* Excluded filters	*/
-    haddr_t     chunk_addr;                     /* Address of chunk in file */
+    hsize_t     scaled[H5O_LAYOUT_NDIMS];    /* Logical offset to start */
+    uint32_t    nbytes;                      /* Size of stored data */
+    uint32_t    filter_mask;                 /* Excluded filters */
+    haddr_t     chunk_addr;                  /* Address of chunk in file */
 } H5D_chunk_rec_t;
 
 /*
@@ -275,9 +255,9 @@ typedef struct H5D_chunk_rec_t {
  * to which the index points.
  */
 typedef struct H5D_chunk_common_ud_t {
-    const H5O_layout_chunk_t *layout;           /* Chunk layout description */
-    const H5O_storage_chunk_t *storage;         /* Chunk storage description */
-    const hsize_t *scaled;		        /* Scaled coordinates for a chunk */
+    const H5O_layout_chunk_t  *layout;           /* Chunk layout description */
+    const H5O_storage_chunk_t *storage;          /* Chunk storage description */
+    const hsize_t             *scaled;           /* Scaled coordinates for a chunk */
 } H5D_chunk_common_ud_t;
 
 /* B-tree callback info for various operations */
@@ -288,7 +268,7 @@ typedef struct H5D_chunk_ud_t {
     /* Upward */
     unsigned    idx_hint;               /* Index of chunk in cache, if present */
     H5F_block_t chunk_block;            /* Offset/length of chunk in file */
-    unsigned	filter_mask;		/* Excluded filters	*/
+    unsigned    filter_mask;            /* Excluded filters */
     hbool_t     new_unfilt_chunk;       /* Whether the chunk just became unfiltered */
     hsize_t     chunk_idx;              /* Chunk index for EA, FA indexing */
 } H5D_chunk_ud_t;
@@ -315,7 +295,7 @@ typedef herr_t (*H5D_chunk_delete_func_t)(const H5D_chk_idx_info_t *idx_info);
 typedef herr_t (*H5D_chunk_copy_setup_func_t)(const H5D_chk_idx_info_t *idx_info_src,
     const H5D_chk_idx_info_t *idx_info_dst);
 typedef herr_t (*H5D_chunk_copy_shutdown_func_t)(H5O_storage_chunk_t *storage_src,
-    H5O_storage_chunk_t *storage_dst, hid_t dxpl_id);
+    H5O_storage_chunk_t *storage_dst);
 typedef herr_t (*H5D_chunk_size_func_t)(const H5D_chk_idx_info_t *idx_info,
     hsize_t *idx_size);
 typedef herr_t (*H5D_chunk_reset_func_t)(H5O_storage_chunk_t *storage, hbool_t reset_addr);
@@ -388,11 +368,11 @@ typedef struct H5D_chunk_map_t {
 /* Cached information about a particular chunk */
 typedef struct H5D_chunk_cached_t {
     hbool_t     valid;                          /*whether cache info is valid*/
-    hsize_t	scaled[H5O_LAYOUT_NDIMS];	/*scaled offset of chunk*/
-    haddr_t	addr;				/*file address of chunk */
-    uint32_t	nbytes;				/*size of stored data	*/
-    hsize_t     chunk_idx;			/*index of chunk in dataset */
-    unsigned	filter_mask;			/*excluded filters	*/
+    hsize_t     scaled[H5O_LAYOUT_NDIMS];       /*scaled offset of chunk*/
+    haddr_t     addr;                  /*file address of chunk */
+    uint32_t    nbytes;                /*size of stored data */
+    hsize_t     chunk_idx;             /*index of chunk in dataset */
+    unsigned    filter_mask;           /*excluded filters */
 } H5D_chunk_cached_t;
 
 /****************************/
@@ -409,23 +389,23 @@ typedef struct H5D_virtual_held_file_t {
 struct H5D_rdcc_ent_t;  /* Forward declaration of struct used below */
 typedef struct H5D_rdcc_t {
     struct {
-        unsigned	ninits;	/* Number of chunk creations		*/
-        unsigned	nhits;	/* Number of cache hits			*/
-        unsigned	nmisses;/* Number of cache misses		*/
-        unsigned	nflushes;/* Number of cache flushes		*/
+        unsigned    ninits;    /* Number of chunk creations        */
+        unsigned    nhits;     /* Number of cache hits            */
+        unsigned    nmisses;   /* Number of cache misses        */
+        unsigned    nflushes;  /* Number of cache flushes        */
     } stats;
-    size_t		nbytes_max; /* Maximum cached raw data in bytes	*/
-    size_t		nslots;	/* Number of chunk slots allocated	*/
-    double		w0;     /* Chunk preemption policy          */
-    struct H5D_rdcc_ent_t *head; /* Head of doubly linked list		*/
-    struct H5D_rdcc_ent_t *tail; /* Tail of doubly linked list		*/
+    size_t        nbytes_max;  /* Maximum cached raw data in bytes    */
+    size_t        nslots;      /* Number of chunk slots allocated    */
+    double        w0;          /* Chunk preemption policy          */
+    struct H5D_rdcc_ent_t *head; /* Head of doubly linked list        */
+    struct H5D_rdcc_ent_t *tail; /* Tail of doubly linked list        */
     struct H5D_rdcc_ent_t *tmp_head; /* Head of temporary doubly linked list.  Chunks on this list are not in the hash table (slot).  The head entry is a sentinel (does not refer to an actual chunk). */
-    size_t		nbytes_used; /* Current cached raw data in bytes */
-    int			nused;	/* Number of chunk slots in use		*/
+    size_t        nbytes_used;  /* Current cached raw data in bytes */
+    int           nused;        /* Number of chunk slots in use        */
     H5D_chunk_cached_t last;    /* Cached copy of last chunk information */
     struct H5D_rdcc_ent_t **slot; /* Chunk slots, each points to a chunk*/
-    H5SL_t		*sel_chunks; /* Skip list containing information for each chunk selected */
-    H5S_t		*single_space; /* Dataspace for single element I/O on chunks */
+    H5SL_t        *sel_chunks;    /* Skip list containing information for each chunk selected */
+    H5S_t         *single_space;  /* Dataspace for single element I/O on chunks */
     H5D_chunk_info_t    *single_chunk_info;  /* Pointer to single chunk's info */
 
     /* Cached information about scaled dataspace dimensions */
@@ -461,10 +441,10 @@ typedef struct H5D_shared_t {
     hbool_t             checked_filters;/* TRUE if dataset passes can_apply check */
 
     /* Cached dataspace info */
-    unsigned            ndims;          /* The dataset's dataspace rank */
-    hsize_t             curr_dims[H5S_MAX_RANK];    /* The curr. size of dataset dimensions */
-    hsize_t             curr_power2up[H5S_MAX_RANK];    /* The curr. dim sizes, rounded up to next power of 2 */
-    hsize_t             max_dims[H5S_MAX_RANK];     /* The max. size of dataset dimensions */ 
+    unsigned            ndims;                        /* The dataset's dataspace rank */
+    hsize_t             curr_dims[H5S_MAX_RANK];      /* The curr. size of dataset dimensions */
+    hsize_t             curr_power2up[H5S_MAX_RANK];  /* The curr. dim sizes, rounded up to next power of 2 */
+    hsize_t             max_dims[H5S_MAX_RANK];       /* The max. size of dataset dimensions */
 
     /* Buffered/cached information for types of raw data storage*/
     struct {
@@ -476,8 +456,9 @@ typedef struct H5D_shared_t {
         H5D_rdcc_t      chunk;          /* Information about chunked data */
     } cache;
 
-    H5D_append_flush_t  append_flush;   /* Append flush property information */
+    H5D_append_flush_t   append_flush;   /* Append flush property information */
     char                *extfile_prefix; /* expanded external file prefix */
+    char                *vds_prefix;     /* expanded vds prefix */
 } H5D_shared_t;
 
 struct H5D_t {
@@ -534,7 +515,6 @@ typedef struct {
     H5S_t *mspace;      /* Memory dataspace for operation */
     void *fl_tbuf;      /* Ptr to the temporary buffer we are using for fixed-length data */
     void *vl_tbuf;      /* Ptr to the temporary buffer we are using for VL data */
-    hid_t xfer_pid;     /* ID of the dataset xfer property list */
     hsize_t size;       /* Accumulated number of bytes for the selection */
 } H5D_vlen_bufsize_t;
 
@@ -542,7 +522,6 @@ typedef struct {
 /*****************************/
 /* Package Private Variables */
 /*****************************/
-extern H5D_dxpl_cache_t H5D_def_dxpl_cache;
 
 /* Storage layout class I/O operations */
 H5_DLLVAR const H5D_layout_ops_t H5D_LOPS_CONTIG[1];
@@ -563,48 +542,53 @@ H5_DLLVAR const H5D_chunk_ops_t H5D_COPS_BT2[1];
 H5_DLLVAR const H5B2_class_t H5D_BT2[1];
 H5_DLLVAR const H5B2_class_t H5D_BT2_FILT[1];
 
+/*  Array of versions for Layout */
+H5_DLLVAR const unsigned H5O_layout_ver_bounds[H5F_LIBVER_NBOUNDS];
+
 
 /******************************/
 /* Package Private Prototypes */
 /******************************/
 
 H5_DLL H5D_t *H5D__create(H5F_t *file, hid_t type_id, const H5S_t *space,
-    hid_t dcpl_id, hid_t dapl_id, hid_t dxpl_id);
+    hid_t dcpl_id, hid_t dapl_id);
 H5_DLL H5D_t *H5D__create_named(const H5G_loc_t *loc, const char *name,
     hid_t type_id, const H5S_t *space, hid_t lcpl_id, hid_t dcpl_id,
-    hid_t dapl_id, hid_t dxpl_id);
-H5_DLL H5D_t *H5D__open_name(const H5G_loc_t *loc, const char *name,
-    hid_t dapl_id, hid_t dxpl_id);
-H5_DLL herr_t H5D__get_space_status(H5D_t *dset, H5D_space_status_t *allocation,
-    hid_t dxpl_id);
+    hid_t dapl_id);
+H5_DLL H5D_t *H5D__create_anon(H5F_t *file, hid_t type_id, const H5S_t *space,
+    hid_t dcpl_id, hid_t dapl_id);
+H5_DLL H5D_t *H5D__open_name(const H5G_loc_t *loc, const char *name, hid_t dapl_id);
+H5_DLL hid_t H5D__get_space(const H5D_t *dset);
+H5_DLL hid_t H5D__get_type(const H5D_t *dset);
+H5_DLL herr_t H5D__get_space_status(const H5D_t *dset, H5D_space_status_t *allocation);
 H5_DLL herr_t H5D__alloc_storage(const H5D_io_info_t *io_info, H5D_time_alloc_t time_alloc,
     hbool_t full_overwrite, hsize_t old_dim[]);
-H5_DLL herr_t H5D__get_storage_size(H5D_t *dset, hid_t dxpl_id, hsize_t *storage_size);
+H5_DLL herr_t H5D__get_storage_size(const H5D_t *dset, hsize_t *storage_size);
+H5_DLL herr_t H5D__get_chunk_storage_size(H5D_t *dset, const hsize_t *offset,
+    hsize_t *storage_size);
 H5_DLL haddr_t H5D__get_offset(const H5D_t *dset);
 H5_DLL void *H5D__vlen_get_buf_size_alloc(size_t size, void *info);
 H5_DLL herr_t H5D__vlen_get_buf_size(void *elem, hid_t type_id, unsigned ndim,
     const hsize_t *point, void *op_data);
 H5_DLL herr_t H5D__check_filters(H5D_t *dataset);
-H5_DLL herr_t H5D__set_extent(H5D_t *dataset, const hsize_t *size, hid_t dxpl_id);
-H5_DLL herr_t H5D__get_dxpl_cache(hid_t dxpl_id, H5D_dxpl_cache_t **cache);
-H5_DLL herr_t H5D__flush_sieve_buf(H5D_t *dataset, hid_t dxpl_id);
-H5_DLL herr_t H5D__flush_real(H5D_t *dataset, hid_t dxpl_id);
-H5_DLL herr_t H5D__mark(const H5D_t *dataset, hid_t dxpl_id, unsigned flags);
-H5_DLL herr_t H5D__refresh(hid_t dset_id, H5D_t *dataset, hid_t dxpl_id);
-#ifdef H5_DEBUG_BUILD
-H5_DLL herr_t H5D_set_io_info_dxpls(H5D_io_info_t *io_info, hid_t dxpl_id);
-#endif /* H5_DEBUG_BUILD */
+H5_DLL herr_t H5D__set_extent(H5D_t *dataset, const hsize_t *size);
+H5_DLL herr_t H5D__flush_sieve_buf(H5D_t *dataset);
+H5_DLL herr_t H5D__flush_real(H5D_t *dataset);
+H5_DLL herr_t H5D__flush(H5D_t *dset, hid_t dset_id);
+H5_DLL hid_t H5D__get_create_plist(const H5D_t *dset);
+H5_DLL herr_t H5D__mark(const H5D_t *dataset, unsigned flags);
+H5_DLL herr_t H5D__refresh(hid_t dset_id, H5D_t *dataset);
 
 /* To convert a dataset's chunk indexing type to v1 B-tree */
-H5_DLL herr_t H5D__format_convert(H5D_t *dataset, hid_t dxpl_id);
+H5_DLL herr_t H5D__format_convert(H5D_t *dataset);
 
 /* Internal I/O routines */
+H5_DLL herr_t H5D__pre_write(H5D_t *dset, hbool_t direct_write, hid_t mem_type_id,
+    const H5S_t *mem_space, const H5S_t *file_space, const void *buf);
 H5_DLL herr_t H5D__read(H5D_t *dataset, hid_t mem_type_id,
-    const H5S_t *mem_space, const H5S_t *file_space, hid_t dset_xfer_plist,
-    void *buf/*out*/);
+    const H5S_t *mem_space, const H5S_t *file_space, void *buf/*out*/);
 H5_DLL herr_t H5D__write(H5D_t *dataset, hid_t mem_type_id,
-    const H5S_t *mem_space, const H5S_t *file_space, hid_t dset_xfer_plist,
-    const void *buf);
+    const H5S_t *mem_space, const H5S_t *file_space, const void *buf);
 
 /* Functions that perform direct serial I/O operations */
 H5_DLL herr_t H5D__select_read(const H5D_io_info_t *io_info,
@@ -615,9 +599,10 @@ H5_DLL herr_t H5D__select_write(const H5D_io_info_t *io_info,
     hsize_t nelmts, const H5S_t *file_space, const H5S_t *mem_space);
 
 /* Functions that perform scatter-gather serial I/O operations */
-H5_DLL herr_t H5D__scatter_mem(const void *_tscat_buf,
-    const H5S_t *space, H5S_sel_iter_t *iter, size_t nelmts,
-    const H5D_dxpl_cache_t *dxpl_cache, void *_buf);
+H5_DLL herr_t H5D__scatter_mem(const void *_tscat_buf, const H5S_t *space,
+    H5S_sel_iter_t *iter, size_t nelmts, void *_buf);
+H5_DLL size_t H5D__gather_mem(const void *_buf, const H5S_t *space,
+    H5S_sel_iter_t *iter, size_t nelmts, void *_tgath_buf/*out*/);
 H5_DLL herr_t H5D__scatgath_read(const H5D_io_info_t *io_info,
     const H5D_type_info_t *type_info,
     hsize_t nelmts, const H5S_t *file_space, const H5S_t *mem_space);
@@ -629,20 +614,17 @@ H5_DLL herr_t H5D__scatgath_write(const H5D_io_info_t *io_info,
 H5_DLL herr_t H5D__layout_set_io_ops(const H5D_t *dataset);
 H5_DLL size_t H5D__layout_meta_size(const H5F_t *f, const H5O_layout_t *layout,
     hbool_t include_compact_data);
-H5_DLL herr_t H5D__layout_set_latest_version(H5O_layout_t *layout,
-    const H5S_t *space, const H5D_dcpl_cache_t *dcpl_cache);
+H5_DLL herr_t H5D__layout_set_version(H5F_t *f, H5O_layout_t *layout);
 H5_DLL herr_t H5D__layout_set_latest_indexing(H5O_layout_t *layout,
     const H5S_t *space, const H5D_dcpl_cache_t *dcpl_cache);
-H5_DLL herr_t H5D__layout_oh_create(H5F_t *file, hid_t dxpl_id, H5O_t *oh,
-    H5D_t *dset, hid_t dapl_id);
-H5_DLL herr_t H5D__layout_oh_read(H5D_t *dset, hid_t dxpl_id, hid_t dapl_id,
+H5_DLL herr_t H5D__layout_oh_create(H5F_t *file, H5O_t *oh, H5D_t *dset,
+    hid_t dapl_id);
+H5_DLL herr_t H5D__layout_oh_read(H5D_t *dset, hid_t dapl_id,
     H5P_genplist_t *plist);
-H5_DLL herr_t H5D__layout_oh_write(H5D_t *dataset, hid_t dxpl_id, H5O_t *oh,
-    unsigned update_flags);
+H5_DLL herr_t H5D__layout_oh_write(const H5D_t *dataset, H5O_t *oh, unsigned update_flags);
 
 /* Functions that operate on contiguous storage */
-H5_DLL herr_t H5D__contig_alloc(H5F_t *f, hid_t dxpl_id,
-    H5O_storage_contig_t *storage);
+H5_DLL herr_t H5D__contig_alloc(H5F_t *f, H5O_storage_contig_t *storage);
 H5_DLL hbool_t H5D__contig_is_space_alloc(const H5O_storage_t *storage);
 H5_DLL herr_t H5D__contig_fill(const H5D_io_info_t *io_info);
 H5_DLL herr_t H5D__contig_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
@@ -653,40 +635,40 @@ H5_DLL herr_t H5D__contig_write(H5D_io_info_t *io_info, const H5D_type_info_t *t
     H5D_chunk_map_t *fm);
 H5_DLL herr_t H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
     H5F_t *f_dst, H5O_storage_contig_t *storage_dst, H5T_t *src_dtype,
-    H5O_copy_t *cpy_info, hid_t dxpl_id);
-H5_DLL herr_t H5D__contig_delete(H5F_t *f, hid_t dxpl_id,
-    const H5O_storage_t *store);
+    H5O_copy_t *cpy_info);
+H5_DLL herr_t H5D__contig_delete(H5F_t *f, const H5O_storage_t *store);
 
 /* Functions that operate on chunked dataset storage */
 H5_DLL htri_t H5D__chunk_cacheable(const H5D_io_info_t *io_info, haddr_t caddr,
     hbool_t write_op);
-H5_DLL herr_t H5D__chunk_create(const H5D_t *dset /*in,out*/, hid_t dxpl_id);
+H5_DLL herr_t H5D__chunk_create(const H5D_t *dset /*in,out*/);
 H5_DLL herr_t H5D__chunk_set_info(const H5D_t *dset);
 H5_DLL hbool_t H5D__chunk_is_space_alloc(const H5O_storage_t *storage);
-H5_DLL herr_t H5D__chunk_lookup(const H5D_t *dset, hid_t dxpl_id,
-    const hsize_t *scaled, H5D_chunk_ud_t *udata);
-H5_DLL herr_t H5D__chunk_allocated(H5D_t *dset, hid_t dxpl_id, hsize_t *nbytes);
+H5_DLL herr_t H5D__chunk_lookup(const H5D_t *dset, const hsize_t *scaled,
+    H5D_chunk_ud_t *udata);
+H5_DLL herr_t H5D__chunk_allocated(const H5D_t *dset, hsize_t *nbytes);
 H5_DLL herr_t H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_t old_dim[]);
-H5_DLL herr_t H5D__chunk_update_old_edge_chunks(H5D_t *dset, hid_t dxpl_id,
-    hsize_t old_dim[]);
-H5_DLL herr_t H5D__chunk_prune_by_extent(H5D_t *dset, hid_t dxpl_id,
-    const hsize_t *old_dim);
+H5_DLL herr_t H5D__chunk_file_alloc(const H5D_chk_idx_info_t *idx_info, const H5F_block_t *old_chunk,
+    H5F_block_t *new_chunk, hbool_t *need_insert, hsize_t scaled[]);
+H5_DLL herr_t H5D__chunk_update_old_edge_chunks(H5D_t *dset, hsize_t old_dim[]);
+H5_DLL herr_t H5D__chunk_prune_by_extent(H5D_t *dset, const hsize_t *old_dim);
 H5_DLL herr_t H5D__chunk_set_sizes(H5D_t *dset);
 #ifdef H5_HAVE_PARALLEL
 H5_DLL herr_t H5D__chunk_addrmap(const H5D_io_info_t *io_info, haddr_t chunk_addr[]);
 #endif /* H5_HAVE_PARALLEL */
-H5_DLL herr_t H5D__chunk_update_cache(H5D_t *dset, hid_t dxpl_id);
+H5_DLL herr_t H5D__chunk_update_cache(H5D_t *dset);
 H5_DLL herr_t H5D__chunk_copy(H5F_t *f_src, H5O_storage_chunk_t *storage_src,
     H5O_layout_chunk_t *layout_src, H5F_t *f_dst, H5O_storage_chunk_t *storage_dst,
     const H5S_extent_t *ds_extent_src, const H5T_t *dt_src,
-    const H5O_pline_t *pline_src, H5O_copy_t *cpy_info, hid_t dxpl_id);
-H5_DLL herr_t H5D__chunk_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh,
+    const H5O_pline_t *pline_src, H5O_copy_t *cpy_info);
+H5_DLL herr_t H5D__chunk_bh_info(const H5O_loc_t *loc, H5O_t *oh,
     H5O_layout_t *layout, hsize_t *btree_size);
-H5_DLL herr_t H5D__chunk_dump_index(H5D_t *dset, hid_t dxpl_id, FILE *stream);
-H5_DLL herr_t H5D__chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    H5O_storage_t *store);
-H5_DLL herr_t H5D__chunk_direct_write(const H5D_t *dset, hid_t dxpl_id, uint32_t filters, 
+H5_DLL herr_t H5D__chunk_dump_index(H5D_t *dset, FILE *stream);
+H5_DLL herr_t H5D__chunk_delete(H5F_t *f, H5O_t *oh, H5O_storage_t *store);
+H5_DLL herr_t H5D__chunk_direct_write(const H5D_t *dset, uint32_t filters,
          hsize_t *offset, uint32_t data_size, const void *buf);
+H5_DLL herr_t H5D__chunk_direct_read(const H5D_t *dset, hsize_t *offset,
+         uint32_t *filters, void *buf);
 #ifdef H5D_CHUNK_DEBUG
 H5_DLL herr_t H5D__chunk_stats(const H5D_t *dset, hbool_t headers);
 #endif /* H5D_CHUNK_DEBUG */
@@ -695,39 +677,38 @@ H5_DLL herr_t H5D__chunk_stats(const H5D_t *dset, hbool_t headers);
 H5_DLL herr_t H5D__chunk_format_convert(H5D_t *dset, H5D_chk_idx_info_t *idx_info, H5D_chk_idx_info_t *new_idx_info);
 
 /* Functions that operate on compact dataset storage */
-H5_DLL herr_t H5D__compact_fill(const H5D_t *dset, hid_t dxpl_id);
+H5_DLL herr_t H5D__compact_fill(const H5D_t *dset);
 H5_DLL herr_t H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *storage_src,
     H5F_t *f_dst, H5O_storage_compact_t *storage_dst, H5T_t *src_dtype,
-    H5O_copy_t *cpy_info, hid_t dxpl_id);
+    H5O_copy_t *cpy_info);
 
 /* Functions that operate on virtual dataset storage */
+H5_DLL herr_t H5D__virtual_store_layout(H5F_t *f, H5O_layout_t *layout);
 H5_DLL herr_t H5D__virtual_copy_layout(H5O_layout_t *layout);
-H5_DLL herr_t H5D__virtual_set_extent_unlim(const H5D_t *dset, hid_t dxpl_id);
+H5_DLL herr_t H5D__virtual_set_extent_unlim(const H5D_t *dset);
 H5_DLL herr_t H5D__virtual_reset_layout(H5O_layout_t *layout);
-H5_DLL herr_t H5D__virtual_delete(H5F_t *f, hid_t dxpl_id, H5O_storage_t *storage);
-H5_DLL herr_t H5D__virtual_copy(H5F_t *f_src, H5O_layout_t *layout_dst,
-    hid_t dxpl_id);
-H5_DLL herr_t H5D__virtual_init(H5F_t *f, hid_t dxpl_id, const H5D_t *dset,
-    hid_t dapl_id);
+H5_DLL herr_t H5D__virtual_delete(H5F_t *f, H5O_storage_t *storage);
+H5_DLL herr_t H5D__virtual_copy(H5F_t *f_src, H5O_layout_t *layout_dst);
+H5_DLL herr_t H5D__virtual_init(H5F_t *f, const H5D_t *dset, hid_t dapl_id);
 H5_DLL hbool_t H5D__virtual_is_space_alloc(const H5O_storage_t *storage);
-H5_DLL herr_t H5D__virtual_hold_source_dset_files(const H5D_t *dset, H5D_virtual_held_file_t **head);
-H5_DLL herr_t H5D__virtual_refresh_source_dsets(H5D_t *dset, hid_t dxpl_id);
+H5_DLL herr_t H5D__virtual_hold_source_dset_files(const H5D_t *dset,
+    H5D_virtual_held_file_t **head);
+H5_DLL herr_t H5D__virtual_refresh_source_dsets(H5D_t *dset);
 H5_DLL herr_t H5D__virtual_release_source_dset_files(H5D_virtual_held_file_t *head);
 
 /* Functions that operate on EFL (External File List)*/
 H5_DLL hbool_t H5D__efl_is_space_alloc(const H5O_storage_t *storage);
-H5_DLL herr_t H5D__efl_bh_info(H5F_t *f, hid_t dxpl_id, H5O_efl_t *efl,
-    hsize_t *heap_size);
+H5_DLL herr_t H5D__efl_bh_info(H5F_t *f, H5O_efl_t *efl, hsize_t *heap_size);
 
 /* Functions that perform fill value operations on datasets */
 H5_DLL herr_t H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
-    const H5T_t *buf_type, const H5S_t *space, hid_t dxpl_id);
+    const H5T_t *buf_type, const H5S_t *space);
 H5_DLL herr_t H5D__fill_init(H5D_fill_buf_info_t *fb_info, void *caller_fill_buf,
     H5MM_allocate_t alloc_func, void *alloc_info,
     H5MM_free_t free_func, void *free_info,
     const H5O_fill_t *fill, const H5T_t *dset_type, hid_t dset_type_id,
-    size_t nelmts, size_t min_buf_size, hid_t dxpl_id);
-H5_DLL herr_t H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts, hid_t dxpl_id);
+    size_t nelmts, size_t min_buf_size);
+H5_DLL herr_t H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts);
 H5_DLL herr_t H5D__fill_term(H5D_fill_buf_info_t *fb_info);
 
 #ifdef H5_HAVE_PARALLEL
@@ -767,8 +748,7 @@ H5_DLL herr_t H5D__chunk_collective_write(H5D_io_info_t *io_info,
  * memory and the file */
 H5_DLL htri_t H5D__mpio_opt_possible(const H5D_io_info_t *io_info,
     const H5S_t *file_space, const H5S_t *mem_space,
-    const H5D_type_info_t *type_info, const H5D_chunk_map_t *fm,
-    H5P_genplist_t *dx_plist);
+    const H5D_type_info_t *type_info);
 
 #endif /* H5_HAVE_PARALLEL */
 
@@ -776,6 +756,7 @@ H5_DLL htri_t H5D__mpio_opt_possible(const H5D_io_info_t *io_info,
 #ifdef H5D_TESTING
 H5_DLL herr_t H5D__layout_version_test(hid_t did, unsigned *version);
 H5_DLL herr_t H5D__layout_contig_size_test(hid_t did, hsize_t *size);
+H5_DLL herr_t H5D__layout_compact_dirty_test(hid_t did, hbool_t *dirty);
 H5_DLL herr_t H5D__layout_idx_type_test(hid_t did, H5D_chunk_index_t *idx_type);
 H5_DLL herr_t H5D__layout_type_test(hid_t did, H5D_layout_t *layout_type);
 H5_DLL herr_t H5D__current_cache_size_test(hid_t did, size_t *nbytes_used, int *nused);
diff --git a/src/H5Dprivate.h b/src/H5Dprivate.h
index ea2b8c8..cbee0de 100644
--- a/src/H5Dprivate.h
+++ b/src/H5Dprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -23,10 +21,10 @@
 #include "H5Dpublic.h"
 
 /* Private headers needed by this file */
-#include "H5FDprivate.h"	/* File drivers				*/
-#include "H5Oprivate.h"		/* Object headers		  	*/
-#include "H5Sprivate.h"		/* Dataspaces 				*/
-#include "H5Zprivate.h"		/* Data filters				*/
+#include "H5FDprivate.h"       /* File drivers                */
+#include "H5Oprivate.h"        /* Object headers              */
+#include "H5Sprivate.h"        /* Dataspaces                  */
+#include "H5Zprivate.h"        /* Data filters                */
 
 
 /**************************/
@@ -35,26 +33,27 @@
 
 /*
  * Feature: Define H5D_DEBUG on the compiler command line if you want to
- *	    debug dataset I/O. NDEBUG must not be defined in order for this
- *	    to have any effect.
+ *        debug dataset I/O. NDEBUG must not be defined in order for this
+ *        to have any effect.
  */
 #ifdef NDEBUG
 #  undef H5D_DEBUG
 #endif
 
 /* ========  Dataset creation property names ======== */
-#define H5D_CRT_LAYOUT_NAME        "layout"             /* Storage layout */
-#define H5D_CRT_FILL_VALUE_NAME    "fill_value"         /* Fill value */
+#define H5D_CRT_LAYOUT_NAME        "layout"              /* Storage layout */
+#define H5D_CRT_FILL_VALUE_NAME    "fill_value"          /* Fill value */
 #define H5D_CRT_ALLOC_TIME_STATE_NAME "alloc_time_state" /* Space allocation time state */
-#define H5D_CRT_EXT_FILE_LIST_NAME "efl"                /* External file list */
+#define H5D_CRT_EXT_FILE_LIST_NAME "efl"                 /* External file list */
 
 /* ========  Dataset access property names ======== */
-#define H5D_ACS_DATA_CACHE_NUM_SLOTS_NAME   "rdcc_nslots"   /* Size of raw data chunk cache(slots) */
-#define H5D_ACS_DATA_CACHE_BYTE_SIZE_NAME   "rdcc_nbytes"   /* Size of raw data chunk cache(bytes) */
-#define H5D_ACS_PREEMPT_READ_CHUNKS_NAME    "rdcc_w0"       /* Preemption read chunks first */
-#define H5D_ACS_VDS_VIEW_NAME               "vds_view"      /* VDS view option */
+#define H5D_ACS_DATA_CACHE_NUM_SLOTS_NAME   "rdcc_nslots"    /* Size of raw data chunk cache(slots) */
+#define H5D_ACS_DATA_CACHE_BYTE_SIZE_NAME   "rdcc_nbytes"    /* Size of raw data chunk cache(bytes) */
+#define H5D_ACS_PREEMPT_READ_CHUNKS_NAME    "rdcc_w0"        /* Preemption read chunks first */
+#define H5D_ACS_VDS_VIEW_NAME               "vds_view"       /* VDS view option */
 #define H5D_ACS_VDS_PRINTF_GAP_NAME         "vds_printf_gap" /* VDS printf gap size */
-#define H5D_ACS_APPEND_FLUSH_NAME    "append_flush"         /* Append flush actions */
+#define H5D_ACS_VDS_PREFIX_NAME             "vds_prefix"     /* VDS file prefix */
+#define H5D_ACS_APPEND_FLUSH_NAME           "append_flush"   /* Append flush actions */
 #define H5D_ACS_EFILE_PREFIX_NAME           "external file prefix" /* External file prefix */
 
 /* ======== Data transfer properties ======== */
@@ -77,11 +76,11 @@
 #define H5D_XFER_MPIO_CHUNK_OPT_RATIO_NAME "mpio_chunk_opt_ratio"
 #define H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_NAME "actual_chunk_opt_mode"
 #define H5D_MPIO_ACTUAL_IO_MODE_NAME    "actual_io_mode"
-#define H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME "local_no_collective_cause"  /* cause of broken collective I/O in each process */
+#define H5D_MPIO_LOCAL_NO_COLLECTIVE_CAUSE_NAME "local_no_collective_cause"    /* cause of broken collective I/O in each process */
 #define H5D_MPIO_GLOBAL_NO_COLLECTIVE_CAUSE_NAME "global_no_collective_cause"  /* cause of broken collective I/O in all processes */
-#define H5D_XFER_EDC_NAME               "err_detect"    /* EDC */
-#define H5D_XFER_FILTER_CB_NAME         "filter_cb"     /* Filter callback function */
-#define H5D_XFER_CONV_CB_NAME           "type_conv_cb"  /* Type conversion callback function */
+#define H5D_XFER_EDC_NAME               "err_detect"     /* EDC */
+#define H5D_XFER_FILTER_CB_NAME         "filter_cb"      /* Filter callback function */
+#define H5D_XFER_CONV_CB_NAME           "type_conv_cb"   /* Type conversion callback function */
 #define H5D_XFER_XFORM_NAME             "data_transform" /* Data transform */
 #ifdef H5_HAVE_INSTRUMENTED_LIBRARY
 /* Collective chunk instrumentation properties */
@@ -121,23 +120,6 @@
 /* Typedef for dataset in memory (defined in H5Dpkg.h) */
 typedef struct H5D_t H5D_t;
 
-/* Typedef for cached dataset transfer property list information */
-typedef struct H5D_dxpl_cache_t {
-    size_t max_temp_buf;        /* Maximum temporary buffer size (H5D_XFER_MAX_TEMP_BUF_NAME) */
-    void *tconv_buf;            /* Temporary conversion buffer (H5D_XFER_TCONV_BUF_NAME) */
-    void *bkgr_buf;             /* Background conversion buffer (H5D_XFER_BKGR_BUF_NAME) */
-    H5T_bkg_t bkgr_buf_type;    /* Background buffer type (H5D_XFER_BKGR_BUF_NAME) */
-    H5Z_EDC_t err_detect;       /* Error detection info (H5D_XFER_EDC_NAME) */
-    double btree_split_ratio[3];/* B-tree split ratios (H5D_XFER_BTREE_SPLIT_RATIO_NAME) */
-    size_t vec_size;            /* Size of hyperslab vector (H5D_XFER_HYPER_VECTOR_SIZE_NAME) */
-#ifdef H5_HAVE_PARALLEL
-    H5FD_mpio_xfer_t xfer_mode; /* Parallel transfer for this request (H5D_XFER_IO_XFER_MODE_NAME) */
-    H5FD_mpio_collective_opt_t coll_opt_mode; /* Parallel transfer with independent IO or collective IO with this mode */
-#endif /*H5_HAVE_PARALLEL*/
-    H5Z_cb_t filter_cb;         /* Filter callback function (H5D_XFER_FILTER_CB_NAME) */
-    H5Z_data_xform_t *data_xform_prop; /* Data transform prop (H5D_XFER_XFORM_NAME) */
-} H5D_dxpl_cache_t;
-
 /* Typedef for cached dataset creation property list information */
 typedef struct H5D_dcpl_cache_t {
     H5O_fill_t fill;            /* Fill value info (H5D_CRT_FILL_VALUE_NAME) */
@@ -154,10 +136,10 @@ typedef struct H5D_copy_file_ud_t {
 
 /* Structure for dataset append flush property (H5Pset_append_flush) */
 typedef struct H5D_append_flush_t {
-    unsigned ndims;			/* The # of dimensions for "boundary" */
-    hsize_t boundary[H5S_MAX_RANK];	/* The dimension sizes for determining boundary */
-    H5D_append_cb_t func;		/* The callback function */
-    void *udata;			/* User data */
+    unsigned ndims;            /* The # of dimensions for "boundary" */
+    hsize_t boundary[H5S_MAX_RANK];    /* The dimension sizes for determining boundary */
+    H5D_append_cb_t func;        /* The callback function */
+    void *udata;            /* User data */
 } H5D_append_flush_t;
 
 
@@ -171,22 +153,19 @@ typedef struct H5D_append_flush_t {
 /******************************/
 
 H5_DLL herr_t H5D_init(void);
-H5_DLL H5D_t *H5D_open(const H5G_loc_t *loc, hid_t dapl_id, hid_t dxpl_id);
+H5_DLL H5D_t *H5D_open(const H5G_loc_t *loc, hid_t dapl_id);
 H5_DLL herr_t H5D_close(H5D_t *dataset);
-H5_DLL herr_t H5D_mult_refresh_close(hid_t dset_id, hid_t dxpl_id);
-H5_DLL herr_t H5D_mult_refresh_reopen(H5D_t *dataset, hid_t dxpl_id);
+H5_DLL herr_t H5D_mult_refresh_close(hid_t dset_id);
+H5_DLL herr_t H5D_mult_refresh_reopen(H5D_t *dataset);
 H5_DLL H5O_loc_t *H5D_oloc(H5D_t *dataset);
 H5_DLL H5G_name_t *H5D_nameof(H5D_t *dataset);
 H5_DLL H5T_t *H5D_typeof(const H5D_t *dset);
-H5_DLL herr_t H5D_flush(const H5F_t *f, hid_t dxpl_id);
-H5_DLL hid_t H5D_get_create_plist(H5D_t *dset);
-H5_DLL hid_t H5D_get_access_plist(H5D_t *dset);
-H5_DLL hid_t H5D_get_space(H5D_t *dset);
-H5_DLL hid_t H5D_get_type(H5D_t *dset);
+H5_DLL herr_t H5D_flush_all(const H5F_t *f);
+H5_DLL hid_t H5D_get_create_plist(const H5D_t *dset);
+H5_DLL hid_t H5D_get_access_plist(const H5D_t *dset);
 
 /* Functions that operate on vlen data */
-H5_DLL herr_t H5D_vlen_reclaim(hid_t type_id, H5S_t *space, hid_t plist_id,
-    void *buf);
+H5_DLL herr_t H5D_vlen_reclaim(hid_t type_id, H5S_t *space, void *buf);
 
 /* Functions that operate on chunked storage */
 H5_DLL herr_t H5D_chunk_idx_reset(H5O_storage_chunk_t *storage, hbool_t reset_addr);
@@ -204,7 +183,7 @@ H5_DLL herr_t H5D_virtual_parse_source_name(const char *source_name,
 H5_DLL herr_t H5D_virtual_free_parsed_name(H5O_storage_virtual_name_seg_t *name_seg);
 
 /* Functions that operate on indexed storage */
-H5_DLL herr_t H5D_btree_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream,
+H5_DLL herr_t H5D_btree_debug(H5F_t *f, haddr_t addr, FILE * stream,
     int indent, int fwidth, unsigned ndims, const uint32_t *dim);
 
 #endif /* _H5Dprivate_H */
diff --git a/src/H5Dpublic.h b/src/H5Dpublic.h
index 81ae67d..790674a 100644
--- a/src/H5Dpublic.h
+++ b/src/H5Dpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -37,11 +35,16 @@
 /* Bit flags for the H5Pset_chunk_opts() and H5Pget_chunk_opts() */
 #define H5D_CHUNK_DONT_FILTER_PARTIAL_CHUNKS      (0x0002u)
 
-/* Property names for H5LTDdirect_chunk_write */   
+/* Property names for H5DOwrite_chunk */   
 #define H5D_XFER_DIRECT_CHUNK_WRITE_FLAG_NAME	        "direct_chunk_flag"
 #define H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_NAME	"direct_chunk_filters"
 #define H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_NAME		"direct_chunk_offset"
 #define H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_NAME	"direct_chunk_datasize"
+
+/* Property names for H5DOread_chunk */
+#define H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME        "direct_chunk_read_flag"
+#define H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME      "direct_chunk_read_offset"
+#define H5D_XFER_DIRECT_CHUNK_READ_FILTERS_NAME     "direct_chunk_read_filters"
  
 /*******************/
 /* Public Typedefs */
@@ -148,6 +151,7 @@ H5_DLL hid_t H5Dget_type(hid_t dset_id);
 H5_DLL hid_t H5Dget_create_plist(hid_t dset_id);
 H5_DLL hid_t H5Dget_access_plist(hid_t dset_id);
 H5_DLL hsize_t H5Dget_storage_size(hid_t dset_id);
+H5_DLL herr_t H5Dget_chunk_storage_size(hid_t dset_id, const hsize_t *offset, hsize_t *chunk_bytes);
 H5_DLL haddr_t H5Dget_offset(hid_t dset_id);
 H5_DLL herr_t H5Dread(hid_t dset_id, hid_t mem_type_id, hid_t mem_space_id,
 			hid_t file_space_id, hid_t plist_id, void *buf/*out*/);
diff --git a/src/H5Dscatgath.c b/src/H5Dscatgath.c
index 55111f0..5856ede 100644
--- a/src/H5Dscatgath.c
+++ b/src/H5Dscatgath.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -24,6 +22,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Dataset functions			*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free Lists                           */
@@ -49,12 +48,8 @@ static herr_t H5D__scatter_file(const H5D_io_info_t *io_info,
 static size_t H5D__gather_file(const H5D_io_info_t *io_info,
     const H5S_t *file_space, H5S_sel_iter_t *file_iter, size_t nelmts,
     void *buf);
-static size_t H5D__gather_mem(const void *_buf,
-    const H5S_t *space, H5S_sel_iter_t *iter, size_t nelmts,
-    const H5D_dxpl_cache_t *dxpl_cache, void *_tgath_buf/*out*/);
 static herr_t H5D__compound_opt_read(size_t nelmts, const H5S_t *mem_space,
-    H5S_sel_iter_t *iter, const H5D_dxpl_cache_t *dxpl_cache,
-    const H5D_type_info_t *type_info, void *user_buf/*out*/);
+    H5S_sel_iter_t *iter, const H5D_type_info_t *type_info, void *user_buf/*out*/);
 static herr_t H5D__compound_opt_write(size_t nelmts, const H5D_type_info_t *type_info);
 
 
@@ -108,6 +103,7 @@ H5D__scatter_file(const H5D_io_info_t *_io_info,
     size_t orig_mem_len, mem_len;  /* Length of sequence in memory */
     size_t nseq;                   /* Number of sequences generated */
     size_t nelem;                  /* Number of elements used in sequences */
+    size_t dxpl_vec_size;          /* Vector length from API context's DXPL */
     size_t vec_size;               /* Vector length */
     herr_t ret_value = SUCCEED;    /* Return value */
 
@@ -125,9 +121,13 @@ H5D__scatter_file(const H5D_io_info_t *_io_info,
     tmp_io_info.op_type = H5D_IO_OP_WRITE;
     tmp_io_info.u.wbuf = _buf;
 
+    /* Get info from API context */
+    if(H5CX_get_vec_size(&dxpl_vec_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve I/O vector size")
+
     /* Allocate the vector I/O arrays */
-    if(tmp_io_info.dxpl_cache->vec_size > H5D_IO_VECTOR_SIZE)
-        vec_size = tmp_io_info.dxpl_cache->vec_size;
+    if(dxpl_vec_size > H5D_IO_VECTOR_SIZE)
+        vec_size = dxpl_vec_size;
     else
         vec_size = H5D_IO_VECTOR_SIZE;
     if(NULL == (len = H5FL_SEQ_MALLOC(size_t, vec_size)))
@@ -204,6 +204,7 @@ H5D__gather_file(const H5D_io_info_t *_io_info,
     size_t orig_mem_len, mem_len;       /* Length of sequence in memory */
     size_t nseq;                /* Number of sequences generated */
     size_t nelem;               /* Number of elements used in sequences */
+    size_t dxpl_vec_size;       /* Vector length from API context's DXPL */
     size_t vec_size;            /* Vector length */
     size_t ret_value = nelmts;  /* Return value */
 
@@ -223,9 +224,13 @@ H5D__gather_file(const H5D_io_info_t *_io_info,
     tmp_io_info.op_type = H5D_IO_OP_READ;
     tmp_io_info.u.rbuf = _buf;
 
+    /* Get info from API context */
+    if(H5CX_get_vec_size(&dxpl_vec_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, 0, "can't retrieve I/O vector size")
+
     /* Allocate the vector I/O arrays */
-    if(tmp_io_info.dxpl_cache->vec_size > H5D_IO_VECTOR_SIZE)
-        vec_size = tmp_io_info.dxpl_cache->vec_size;
+    if(dxpl_vec_size > H5D_IO_VECTOR_SIZE)
+        vec_size = dxpl_vec_size;
     else
         vec_size = H5D_IO_VECTOR_SIZE;
     if(NULL == (len = H5FL_SEQ_MALLOC(size_t, vec_size)))
@@ -284,8 +289,7 @@ done:
  */
 herr_t
 H5D__scatter_mem (const void *_tscat_buf, const H5S_t *space,
-    H5S_sel_iter_t *iter, size_t nelmts, const H5D_dxpl_cache_t *dxpl_cache,
-    void *_buf/*out*/)
+    H5S_sel_iter_t *iter, size_t nelmts, void *_buf/*out*/)
 {
     uint8_t *buf = (uint8_t *)_buf;   /* Get local copies for address arithmetic */
     const uint8_t *tscat_buf = (const uint8_t *)_tscat_buf;
@@ -295,6 +299,7 @@ H5D__scatter_mem (const void *_tscat_buf, const H5S_t *space,
     size_t nseq;                /* Number of sequences generated */
     size_t curr_seq;            /* Current sequence being processed */
     size_t nelem;               /* Number of elements used in sequences */
+    size_t dxpl_vec_size;       /* Vector length from API context's DXPL */
     size_t vec_size;            /* Vector length */
     herr_t ret_value = SUCCEED; /* Number of elements scattered */
 
@@ -307,9 +312,13 @@ H5D__scatter_mem (const void *_tscat_buf, const H5S_t *space,
     HDassert(nelmts > 0);
     HDassert(buf);
 
+    /* Get info from API context */
+    if(H5CX_get_vec_size(&dxpl_vec_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve I/O vector size")
+
     /* Allocate the vector I/O arrays */
-    if(dxpl_cache->vec_size > H5D_IO_VECTOR_SIZE)
-        vec_size = dxpl_cache->vec_size;
+    if(dxpl_vec_size > H5D_IO_VECTOR_SIZE)
+        vec_size = dxpl_vec_size;
     else
         vec_size = H5D_IO_VECTOR_SIZE;
     if(NULL == (len = H5FL_SEQ_MALLOC(size_t, vec_size)))
@@ -366,10 +375,9 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-static size_t
+size_t
 H5D__gather_mem(const void *_buf, const H5S_t *space,
-    H5S_sel_iter_t *iter, size_t nelmts, const H5D_dxpl_cache_t *dxpl_cache,
-    void *_tgath_buf/*out*/)
+    H5S_sel_iter_t *iter, size_t nelmts, void *_tgath_buf/*out*/)
 {
     const uint8_t *buf = (const uint8_t *)_buf;   /* Get local copies for address arithmetic */
     uint8_t *tgath_buf = (uint8_t *)_tgath_buf;
@@ -379,6 +387,7 @@ H5D__gather_mem(const void *_buf, const H5S_t *space,
     size_t nseq;                /* Number of sequences generated */
     size_t curr_seq;            /* Current sequence being processed */
     size_t nelem;               /* Number of elements used in sequences */
+    size_t dxpl_vec_size;       /* Vector length from API context's DXPL */
     size_t vec_size;            /* Vector length */
     size_t ret_value = nelmts;  /* Number of elements gathered */
 
@@ -391,9 +400,13 @@ H5D__gather_mem(const void *_buf, const H5S_t *space,
     HDassert(nelmts > 0);
     HDassert(tgath_buf);
 
+    /* Get info from API context */
+    if(H5CX_get_vec_size(&dxpl_vec_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, 0, "can't retrieve I/O vector size")
+
     /* Allocate the vector I/O arrays */
-    if(dxpl_cache->vec_size > H5D_IO_VECTOR_SIZE)
-        vec_size = dxpl_cache->vec_size;
+    if(dxpl_vec_size > H5D_IO_VECTOR_SIZE)
+        vec_size = dxpl_vec_size;
     else
         vec_size = H5D_IO_VECTOR_SIZE;
     if(NULL == (len = H5FL_SEQ_MALLOC(size_t, vec_size)))
@@ -449,7 +462,6 @@ herr_t
 H5D__scatgath_read(const H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     hsize_t nelmts, const H5S_t *file_space, const H5S_t *mem_space)
 {
-    const H5D_dxpl_cache_t *dxpl_cache = io_info->dxpl_cache;     /* Local pointer to dataset transfer info */
     void        *buf = io_info->u.rbuf; /* Local pointer to application buffer */
     H5S_sel_iter_t *mem_iter = NULL;    /* Memory selection iteration info*/
     hbool_t	mem_iter_init = FALSE;	/* Memory selection iteration info has been initialized */
@@ -519,12 +531,12 @@ H5D__scatgath_read(const H5D_io_info_t *io_info, const H5D_type_info_t *type_inf
          * bypass the rest of steps.
          */
         if(type_info->cmpd_subset && H5T_SUBSET_FALSE != type_info->cmpd_subset->subset) {
-            if(H5D__compound_opt_read(smine_nelmts, mem_space, mem_iter, dxpl_cache, type_info, buf /*out*/) < 0)
+            if(H5D__compound_opt_read(smine_nelmts, mem_space, mem_iter, type_info, buf /*out*/) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "datatype conversion failed")
         } /* end if */
         else {
             if(H5T_BKG_YES == type_info->need_bkg) {
-                n = H5D__gather_mem(buf, mem_space, bkg_iter, smine_nelmts, dxpl_cache, type_info->bkg_buf/*out*/);
+                n = H5D__gather_mem(buf, mem_space, bkg_iter, smine_nelmts, type_info->bkg_buf/*out*/);
                 if(n != smine_nelmts)
                     HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "mem gather failed")
             } /* end if */
@@ -534,18 +546,25 @@ H5D__scatgath_read(const H5D_io_info_t *io_info, const H5D_type_info_t *type_inf
              */
             if(H5T_convert(type_info->tpath, type_info->src_type_id, type_info->dst_type_id,
                     smine_nelmts, (size_t)0, (size_t)0, type_info->tconv_buf,
-                    type_info->bkg_buf, io_info->md_dxpl_id) < 0)
+                    type_info->bkg_buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed")
 
             /* Do the data transform after the conversion (since we're using type mem_type) */
-            if(!type_info->is_xform_noop)
-                if(H5Z_xform_eval(dxpl_cache->data_xform_prop, type_info->tconv_buf, smine_nelmts, type_info->mem_type) < 0)
-                    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Error performing data transform")
+            if(!type_info->is_xform_noop) {
+                H5Z_data_xform_t *data_transform;   /* Data transform info */
+
+                /* Retrieve info from API context */
+                if(H5CX_get_data_transform(&data_transform) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get data transform info")
+
+                if(H5Z_xform_eval(data_transform, type_info->tconv_buf, smine_nelmts, type_info->mem_type) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "Error performing data transform")
+            } /* end if */
 
             /*
              * Scatter the data into memory.
              */
-            if(H5D__scatter_mem(type_info->tconv_buf, mem_space, mem_iter, smine_nelmts, dxpl_cache, buf/*out*/) < 0)
+            if(H5D__scatter_mem(type_info->tconv_buf, mem_space, mem_iter, smine_nelmts, buf/*out*/) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "scatter failed")
         } /* end else */
     } /* end for */
@@ -585,7 +604,6 @@ herr_t
 H5D__scatgath_write(const H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     hsize_t nelmts, const H5S_t *file_space, const H5S_t *mem_space)
 {
-    const H5D_dxpl_cache_t *dxpl_cache = io_info->dxpl_cache;     /* Local pointer to dataset transfer info */
     const void  *buf = io_info->u.wbuf; /* Local pointer to application buffer */
     H5S_sel_iter_t *mem_iter = NULL;    /* Memory selection iteration info*/
     hbool_t	mem_iter_init = FALSE;	/* Memory selection iteration info has been initialized */
@@ -642,7 +660,7 @@ H5D__scatgath_write(const H5D_io_info_t *io_info, const H5D_type_info_t *type_in
          * buffer. Also gather data from the file into the background buffer
          * if necessary.
          */
-        n = H5D__gather_mem(buf, mem_space, mem_iter, smine_nelmts, dxpl_cache, type_info->tconv_buf/*out*/);
+        n = H5D__gather_mem(buf, mem_space, mem_iter, smine_nelmts, type_info->tconv_buf/*out*/);
         if(n != smine_nelmts)
             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "mem gather failed")
 
@@ -666,16 +684,23 @@ H5D__scatgath_write(const H5D_io_info_t *io_info, const H5D_type_info_t *type_in
 
             /* Do the data transform before the type conversion (since
              * transforms must be done in the memory type). */
-            if(!type_info->is_xform_noop)
-	        if(H5Z_xform_eval(dxpl_cache->data_xform_prop, type_info->tconv_buf, smine_nelmts, type_info->mem_type) < 0)
-		    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Error performing data transform")
+            if(!type_info->is_xform_noop) {
+                H5Z_data_xform_t *data_transform;   /* Data transform info */
+
+                /* Retrieve info from API context */
+                if(H5CX_get_data_transform(&data_transform) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get data transform info")
+
+	        if(H5Z_xform_eval(data_transform, type_info->tconv_buf, smine_nelmts, type_info->mem_type) < 0)
+		    HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "Error performing data transform")
+            } /* end if */
 
             /*
              * Perform datatype conversion.
              */
             if(H5T_convert(type_info->tpath, type_info->src_type_id, type_info->dst_type_id,
                     smine_nelmts, (size_t)0, (size_t)0, type_info->tconv_buf,
-                    type_info->bkg_buf, io_info->md_dxpl_id) < 0)
+                    type_info->bkg_buf) < 0)
                  HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed")
         } /* end else */
 
@@ -738,8 +763,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__compound_opt_read(size_t nelmts, const H5S_t *space,
-    H5S_sel_iter_t *iter, const H5D_dxpl_cache_t *dxpl_cache,
+H5D__compound_opt_read(size_t nelmts, const H5S_t *space, H5S_sel_iter_t *iter,
     const H5D_type_info_t *type_info, void *user_buf/*out*/)
 {
     uint8_t    *ubuf = (uint8_t *)user_buf;     /* Cast for pointer arithmetic	*/
@@ -747,6 +771,7 @@ H5D__compound_opt_read(size_t nelmts, const H5S_t *space,
     hsize_t    *off = NULL;                     /* Pointer to sequence offsets */
     size_t     *len = NULL;                     /* Pointer to sequence lengths */
     size_t     src_stride, dst_stride, copy_size;
+    size_t     dxpl_vec_size;                   /* Vector length from API context's DXPL */
     size_t     vec_size;                        /* Vector length */
     herr_t     ret_value = SUCCEED;	        /* Return value		*/
 
@@ -756,16 +781,19 @@ H5D__compound_opt_read(size_t nelmts, const H5S_t *space,
     HDassert(nelmts > 0);
     HDassert(space);
     HDassert(iter);
-    HDassert(dxpl_cache);
     HDassert(type_info);
     HDassert(type_info->cmpd_subset);
     HDassert(H5T_SUBSET_SRC == type_info->cmpd_subset->subset ||
         H5T_SUBSET_DST == type_info->cmpd_subset->subset);
     HDassert(user_buf);
 
+    /* Get info from API context */
+    if(H5CX_get_vec_size(&dxpl_vec_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve I/O vector size")
+
     /* Allocate the vector I/O arrays */
-    if(dxpl_cache->vec_size > H5D_IO_VECTOR_SIZE)
-        vec_size = dxpl_cache->vec_size;
+    if(dxpl_vec_size > H5D_IO_VECTOR_SIZE)
+        vec_size = dxpl_vec_size;
     else
         vec_size = H5D_IO_VECTOR_SIZE;
     if(NULL == (len = H5FL_SEQ_MALLOC(size_t, vec_size)))
@@ -927,8 +955,6 @@ H5Dscatter(H5D_scatter_func_t op, void *op_data, hid_t type_id,
     size_t type_size;           /* Datatype element size */
     hssize_t nelmts;            /* Number of remaining elements in selection */
     size_t nelmts_scatter = 0;  /* Number of elements to scatter to dst_buf */
-    H5D_dxpl_cache_t _dxpl_cache; /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache; /* Data transfer property cache */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -944,10 +970,6 @@ H5Dscatter(H5D_scatter_func_t op, void *op_data, hid_t type_id,
     if(dst_buf == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no destination buffer provided")
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(H5AC_noio_dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Get datatype element size */
     if(0 == (type_size = H5T_GET_SIZE(type)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get datatype size")
@@ -985,7 +1007,7 @@ H5Dscatter(H5D_scatter_func_t op, void *op_data, hid_t type_id,
             HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "callback returned more elements than in selection")
 
         /* Scatter data */
-        if(H5D__scatter_mem(src_buf, dst_space, iter, nelmts_scatter, dxpl_cache, dst_buf) < 0)
+        if(H5D__scatter_mem(src_buf, dst_space, iter, nelmts_scatter, dst_buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "scatter failed")
 
         nelmts -= (hssize_t)nelmts_scatter;
@@ -1030,8 +1052,6 @@ H5Dgather(hid_t src_space_id, const void *src_buf, hid_t type_id,
     hssize_t nelmts;            /* Number of remaining elements in selection */
     size_t dst_buf_nelmts;      /* Number of elements that can fit in dst_buf */
     size_t nelmts_gathered;     /* Number of elements gathered from src_buf */
-    H5D_dxpl_cache_t _dxpl_cache; /* Data transfer property cache buffer */
-    H5D_dxpl_cache_t *dxpl_cache = &_dxpl_cache; /* Data transfer property cache */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1050,10 +1070,6 @@ H5Dgather(hid_t src_space_id, const void *src_buf, hid_t type_id,
     if(dst_buf == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no destination buffer provided")
 
-    /* Fill the DXPL cache values for later use */
-    if(H5D__get_dxpl_cache(H5AC_noio_dxpl_id, &dxpl_cache) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't fill dxpl cache")
-
     /* Get datatype element size */
     if(0 == (type_size = H5T_GET_SIZE(type)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get datatype size")
@@ -1084,7 +1100,7 @@ H5Dgather(hid_t src_space_id, const void *src_buf, hid_t type_id,
     /* Loop until all data has been scattered */
     while(nelmts > 0) {
         /* Gather data */
-        if(0 == (nelmts_gathered = H5D__gather_mem(src_buf, src_space, iter, MIN(dst_buf_nelmts, (size_t)nelmts), dxpl_cache, dst_buf)))
+        if(0 == (nelmts_gathered = H5D__gather_mem(src_buf, src_space, iter, MIN(dst_buf_nelmts, (size_t)nelmts), dst_buf)))
             HGOTO_ERROR(H5E_IO, H5E_CANTCOPY, FAIL, "gather failed")
         HDassert(nelmts_gathered == MIN(dst_buf_nelmts, (size_t)nelmts));
 
diff --git a/src/H5Dselect.c b/src/H5Dselect.c
index 53829e5..0ec3423 100644
--- a/src/H5Dselect.c
+++ b/src/H5Dselect.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.ued>
@@ -30,6 +28,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Datasets				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free Lists                           */
@@ -101,6 +100,7 @@ H5D__select_io(const H5D_io_info_t *io_info, size_t elmt_size,
     size_t curr_file_seq;       /* Current file sequence to operate on */
     size_t mem_nseq;            /* Number of sequences generated in the file */
     size_t file_nseq;           /* Number of sequences generated in memory */
+    size_t dxpl_vec_size;       /* Vector length from API context's DXPL */
     size_t vec_size;            /* Vector length */
     ssize_t tmp_file_len;       /* Temporary number of bytes in file sequence */
     herr_t ret_value = SUCCEED; /* Return value */
@@ -111,12 +111,15 @@ H5D__select_io(const H5D_io_info_t *io_info, size_t elmt_size,
     HDassert(io_info);
     HDassert(io_info->dset);
     HDassert(io_info->store);
-    HDassert(TRUE == H5P_isa_class(io_info->raw_dxpl_id, H5P_DATASET_XFER));
     HDassert(io_info->u.rbuf);
 
+    /* Get info from API context */
+    if(H5CX_get_vec_size(&dxpl_vec_size) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't retrieve I/O vector size")
+
     /* Allocate the vector I/O arrays */
-    if(io_info->dxpl_cache->vec_size > H5D_IO_VECTOR_SIZE)
-        vec_size = io_info->dxpl_cache->vec_size;
+    if(dxpl_vec_size > H5D_IO_VECTOR_SIZE)
+        vec_size = dxpl_vec_size;
     else
         vec_size = H5D_IO_VECTOR_SIZE;
     if(NULL == (mem_len = H5FL_SEQ_MALLOC(size_t, vec_size)))
diff --git a/src/H5Dsingle.c b/src/H5Dsingle.c
index 04b8971..321d258 100644
--- a/src/H5Dsingle.c
+++ b/src/H5Dsingle.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer: 	Vailin Choi <vchoi@hdfgroup.org>
@@ -245,13 +243,11 @@ H5D__single_idx_insert(const H5D_chk_idx_info_t *idx_info, H5D_chunk_ud_t *udata
 	idx_info->storage->u.single.filter_mask = udata->filter_mask;
     } /* end if */
 
-    if(dset) {
-	if(dset->shared->dcpl_cache.fill.alloc_time != H5D_ALLOC_TIME_EARLY || idx_info->pline->nused > 0) {
+    if(dset)
+	if(dset->shared->dcpl_cache.fill.alloc_time != H5D_ALLOC_TIME_EARLY || idx_info->pline->nused > 0)
 	    /* Mark the layout dirty so that the address of the single chunk will be flushed later */
-	    if(H5D__mark(dset, idx_info->dxpl_id, H5D_MARK_LAYOUT) < 0)
+	    if(H5D__mark(dset, H5D_MARK_LAYOUT) < 0)
 		HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to mark layout as dirty")
-	} /* end if */
-    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -384,7 +380,7 @@ H5D__single_idx_remove(const H5D_chk_idx_info_t *idx_info, H5D_chunk_common_ud_t
     else
 	nbytes = idx_info->layout->size;
 
-    if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->dxpl_id, idx_info->storage->idx_addr, nbytes) < 0)
+    if(H5MF_xfree(idx_info->f, H5FD_MEM_DRAW, idx_info->storage->idx_addr, nbytes) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, H5_ITER_ERROR, "unable to free dataset chunks")
 
     idx_info->storage->idx_addr = HADDR_UNDEF;
@@ -463,14 +459,14 @@ H5D__single_idx_copy_setup(const H5D_chk_idx_info_t *idx_info_src,
     HDassert(idx_info_dst->storage);
 
     /* Set copied metadata tag */
-    H5_BEGIN_TAG(idx_info_dst->dxpl_id, H5AC__COPIED_TAG, FAIL);
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Set up information at the destination file */
     if(H5D__single_idx_create(idx_info_dst) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to initialize chunked storage")
 
     /* Reset metadata tag */
-    H5_END_TAG(FAIL);
+    H5_END_TAG
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Dtest.c b/src/H5Dtest.c
index 56f14f7..c2b6199 100644
--- a/src/H5Dtest.c
+++ b/src/H5Dtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
@@ -144,6 +142,47 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
+    H5D__layout_compact_dirty_test
+ PURPOSE
+    Determine the "dirty" flag of a compact layout for a dataset's layout information
+ USAGE
+    herr_t H5D__layout_compact_dirty_test(did, dirty)
+        hid_t did;              IN: Dataset to query
+        hbool_t *dirty;         OUT: Pointer to location to place "dirty" info
+ RETURNS
+    Non-negative on success, negative on failure
+ DESCRIPTION
+    Checks the "dirty" flag of a compact dataset.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    DO NOT USE THIS FUNCTION FOR ANYTHING EXCEPT TESTING
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+herr_t
+H5D__layout_compact_dirty_test(hid_t did, hbool_t *dirty)
+{
+    H5D_t *dset;                /* Pointer to dataset to query */
+    herr_t ret_value = SUCCEED; /* return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args */
+    if(NULL == (dset = (H5D_t *)H5I_object_verify(did, H5I_DATASET)))
+        HGOTO_ERROR(H5E_DATASET, H5E_BADTYPE, FAIL, "not a dataset")
+
+    if(dirty) {
+        HDassert(dset->shared->layout.type == H5D_COMPACT);
+        *dirty = dset->shared->layout.storage.u.compact.dirty;
+    } /* end if */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+}   /* H5D__layout_compact_dirty_test() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
     H5D__layout_type_test
  PURPOSE
     Determine the storage layout type for a dataset
diff --git a/src/H5Dvirtual.c b/src/H5Dvirtual.c
index c0def50..c7c0775 100644
--- a/src/H5Dvirtual.c
+++ b/src/H5Dvirtual.c
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -48,6 +46,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"          /* Generic Functions                    */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"             /* Dataset functions                    */
 #include "H5Eprivate.h"         /* Error handling                       */
 #include "H5Fprivate.h"         /* Files                                */
@@ -57,6 +56,7 @@
 #include "H5Iprivate.h"         /* IDs                                  */
 #include "H5MMprivate.h"        /* Memory management                    */
 #include "H5Oprivate.h"         /* Object headers                       */
+#include "H5Pprivate.h"         /* Property Lists                       */
 #include "H5Sprivate.h"         /* Dataspaces                           */
 
 
@@ -84,14 +84,13 @@ static herr_t H5D__virtual_read(H5D_io_info_t *io_info, const H5D_type_info_t
 static herr_t H5D__virtual_write(H5D_io_info_t *io_info,
     const H5D_type_info_t *type_info, hsize_t nelmts, const H5S_t *file_space,
     const H5S_t *mem_space, H5D_chunk_map_t *fm);
-static herr_t H5D__virtual_flush(H5D_t *dset, hid_t dxpl_id);
+static herr_t H5D__virtual_flush(H5D_t *dset);
 
 /* Other functions */
 static herr_t H5D__virtual_open_source_dset(const H5D_t *vdset,
     H5O_storage_virtual_ent_t *virtual_ent,
-    H5O_storage_virtual_srcdset_t *source_dset, hid_t dxpl_id);
-static herr_t H5D__virtual_reset_source_dset(
-    H5O_storage_virtual_ent_t *virtual_ent,
+    H5O_storage_virtual_srcdset_t *source_dset);
+static herr_t H5D__virtual_reset_source_dset(H5O_storage_virtual_ent_t *virtual_ent,
     H5O_storage_virtual_srcdset_t *source_dset);
 static herr_t H5D__virtual_str_append(const char *src, size_t src_len, char **p,
     char **buf, size_t *buf_size);
@@ -100,7 +99,7 @@ static herr_t H5D__virtual_copy_parsed_name(
 static herr_t H5D__virtual_build_source_name(char *source_name,
     const H5O_storage_virtual_name_seg_t *parsed_name, size_t static_strlen,
     size_t nsubs, hsize_t blockno, char **built_name);
-static herr_t H5D__virtual_init_all(const H5D_t *dset, hid_t dxpl_id);
+static herr_t H5D__virtual_init_all(const H5D_t *dset);
 static herr_t H5D__virtual_pre_io(H5D_io_info_t *io_info,
     H5O_storage_virtual_t *storage, const H5S_t *file_space,
     const H5S_t *mem_space, hsize_t *tot_nelmts);
@@ -148,7 +147,7 @@ H5FL_DEFINE(H5O_storage_virtual_name_seg_t);
 H5FL_DEFINE_STATIC(H5D_virtual_held_file_t);
 
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D_virtual_check_mapping_pre
  *
@@ -218,7 +217,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D_virtual_check_mapping_pre() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D_virtual_check_mapping_post
  *
@@ -286,7 +285,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D_virtual_check_mapping_post() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D_virtual_update_min_dims
  *
@@ -345,7 +344,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D_virtual_update_min_dims() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D_virtual_check_min_dims
  *
@@ -390,6 +389,140 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D_virtual_check_min_dims() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5D__virtual_store_layout
+ *
+ * Purpose:     Store virtual dataset layout information, for new dataset
+ *
+ * Note:        We assume here that the contents of the heap block cannot
+ *		change!  If this ever stops being the case we must change
+ *		this code to allow overwrites of the heap block.  -NAF
+ *
+ * Return:      Success:    SUCCEED
+ *              Failure:    FAIL
+ *
+ * Programmer:  Quincey Koziol
+ *              Sunday, Feberuary 11, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5D__virtual_store_layout(H5F_t *f, H5O_layout_t *layout)
+{
+    uint8_t *heap_block = NULL;         /* Block to add to heap */
+    size_t *str_size = NULL;            /* Array for VDS entry string lengths */
+    uint8_t *heap_block_p;              /* Pointer into the heap block, while encoding */
+    size_t block_size;                  /* Total size of block needed */
+    hsize_t tmp_nentries;               /* Temp. variable for # of VDS entries */
+    uint32_t chksum;                    /* Checksum for heap data */
+    size_t i;                           /* Local index variable */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Sanity checking */
+    HDassert(f);
+    HDassert(layout);
+    HDassert(layout->storage.u.virt.serial_list_hobjid.addr == HADDR_UNDEF);
+
+    /* Create block if # of used entries > 0 */
+    if(layout->storage.u.virt.list_nused > 0) {
+        /* Allocate array for caching results of strlen */
+        if(NULL == (str_size = (size_t *)H5MM_malloc(2 * layout->storage.u.virt.list_nused * sizeof(size_t))))
+            HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, FAIL, "unable to allocate string length array")
+
+        /*
+         * Calculate heap block size
+         */
+
+        /* Version and number of entries */
+        block_size = (size_t)1 + H5F_SIZEOF_SIZE(f);
+
+        /* Calculate size of each entry */
+        for(i = 0; i < layout->storage.u.virt.list_nused; i++) {
+            hssize_t select_serial_size;        /* Size of serialized selection */
+
+            HDassert(layout->storage.u.virt.list[i].source_file_name);
+            HDassert(layout->storage.u.virt.list[i].source_dset_name);
+            HDassert(layout->storage.u.virt.list[i].source_select);
+            HDassert(layout->storage.u.virt.list[i].source_dset.virtual_select);
+
+            /* Source file name */
+            str_size[2 * i] = HDstrlen(layout->storage.u.virt.list[i].source_file_name) + (size_t)1;
+            block_size += str_size[2 * i];
+
+            /* Source dset name */
+            str_size[(2 * i) + 1] = HDstrlen(layout->storage.u.virt.list[i].source_dset_name) + (size_t)1;
+            block_size += str_size[(2 * i) + 1];
+
+            /* Source selection */
+            if((select_serial_size = H5S_SELECT_SERIAL_SIZE(layout->storage.u.virt.list[i].source_select)) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTENCODE, FAIL, "unable to check dataspace selection size")
+            block_size += (size_t)select_serial_size;
+
+            /* Virtual dataset selection */
+            if((select_serial_size = H5S_SELECT_SERIAL_SIZE(layout->storage.u.virt.list[i].source_dset.virtual_select)) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTENCODE, FAIL, "unable to check dataspace selection size")
+            block_size += (size_t)select_serial_size;
+        } /* end for */
+
+        /* Checksum */
+        block_size += 4;
+
+
+        /* Allocate heap block */
+        if(NULL == (heap_block = (uint8_t *)H5MM_malloc(block_size)))
+            HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, FAIL, "unable to allocate heap block")
+
+
+        /*
+         * Encode heap block
+         */
+        heap_block_p = heap_block;
+
+        /* Encode heap block encoding version */
+        *heap_block_p++ = (uint8_t)H5O_LAYOUT_VDS_GH_ENC_VERS;
+
+        /* Number of entries */
+        tmp_nentries = (hsize_t)layout->storage.u.virt.list_nused;
+        H5F_ENCODE_LENGTH(f, heap_block_p, tmp_nentries)
+
+        /* Encode each entry */
+        for(i = 0; i < layout->storage.u.virt.list_nused; i++) {
+            /* Source file name */
+            HDmemcpy((char *)heap_block_p, layout->storage.u.virt.list[i].source_file_name, str_size[2 * i]);
+            heap_block_p += str_size[2 * i];
+
+            /* Source dataset name */
+            HDmemcpy((char *)heap_block_p, layout->storage.u.virt.list[i].source_dset_name, str_size[(2 * i) + 1]);
+            heap_block_p += str_size[(2 * i) + 1];
+
+            /* Source selection */
+            if(H5S_SELECT_SERIALIZE(layout->storage.u.virt.list[i].source_select, &heap_block_p) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to serialize source selection")
+
+            /* Virtual selection */
+            if(H5S_SELECT_SERIALIZE(layout->storage.u.virt.list[i].source_dset.virtual_select, &heap_block_p) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to serialize virtual selection")
+        } /* end for */
+
+        /* Checksum */
+        chksum = H5_checksum_metadata(heap_block, block_size - (size_t)4, 0);
+        UINT32ENCODE(heap_block_p, chksum)
+
+        /* Insert block into global heap */
+        if(H5HG_insert(f, block_size, heap_block, &(layout->storage.u.virt.serial_list_hobjid)) < 0) /* Casting away const OK  --NAF */
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to insert virtual dataset heap block")
+    } /* end if */
+
+done:
+    heap_block = (uint8_t *)H5MM_xfree(heap_block);
+    str_size = (size_t *)H5MM_xfree(str_size);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5D__virtual_store_layout() */
+
 
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_copy_layout
@@ -554,7 +687,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_copy_layout() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_reset_layout
  *
@@ -638,7 +771,7 @@ H5D__virtual_reset_layout(H5O_layout_t *layout)
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_reset_layout() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_copy
  *
@@ -652,39 +785,36 @@ H5D__virtual_reset_layout(H5O_layout_t *layout)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__virtual_copy(H5F_t H5_ATTR_UNUSED *f_dst, H5O_layout_t *layout_dst,
-    hid_t H5_ATTR_UNUSED dxpl_id)
+H5D__virtual_copy(H5F_t *f_dst, H5O_layout_t *layout_dst)
 {
     herr_t          ret_value = SUCCEED;
 
-#ifdef NOT_YET
     FUNC_ENTER_PACKAGE
-#endif /* NOT_YET */
-    FUNC_ENTER_PACKAGE_NOERR
 
 #ifdef NOT_YET
     /* Check for copy to the same file */
     if(f_dst == f_src) {
         /* Increase reference count on global heap object */
-        if((heap_rc = H5HG_link(f_dst, dxpl_id, (H5HG_t *)&(layout_dst->u.virt.serial_list_hobjid), 1)) < 0)
+        if((heap_rc = H5HG_link(f_dst, (H5HG_t *)&(layout_dst->u.virt.serial_list_hobjid), 1)) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTMODIFY, FAIL, "unable to adjust global heap refence count")
     } /* end if */
     else
 #endif /* NOT_YET */
     {
-        /* Reset global heap id so a new heap object is created when the message
-         * is flushed */
+        /* Reset global heap id */
         layout_dst->storage.u.virt.serial_list_hobjid.addr = HADDR_UNDEF;
         layout_dst->storage.u.virt.serial_list_hobjid.idx = (size_t)0;
+
+        /* Write the VDS data to destination file's heap */
+        if(H5D__virtual_store_layout(f_dst, layout_dst) < 0)
+             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to store VDS info")
     } /* end block/else */
 
-#ifdef NOT_YET
 done:
-#endif /* NOT_YET */
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_copy() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_delete
  *
@@ -698,7 +828,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__virtual_delete(H5F_t *f, hid_t dxpl_id, H5O_storage_t *storage)
+H5D__virtual_delete(H5F_t *f, H5O_storage_t *storage)
 {
 #ifdef NOT_YET
     int heap_rc;                /* Reference count of global heap object */
@@ -716,12 +846,12 @@ H5D__virtual_delete(H5F_t *f, hid_t dxpl_id, H5O_storage_t *storage)
     if(storage->u.virt.serial_list_hobjid.addr != HADDR_UNDEF) {
 #ifdef NOT_YET
         /* Unlink the global heap block */
-        if((heap_rc = H5HG_link(f, dxpl_id, (H5HG_t *)&(storage->u.virt.serial_list_hobjid), -1)) < 0)
+        if((heap_rc = H5HG_link(f, (H5HG_t *)&(storage->u.virt.serial_list_hobjid), -1)) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTMODIFY, FAIL, "unable to adjust global heap refence count")
         if(heap_rc == 0)
 #endif /* NOT_YET */
             /* Delete the global heap block */
-            if(H5HG_remove(f, dxpl_id, (H5HG_t *)&(storage->u.virt.serial_list_hobjid)) < 0)
+            if(H5HG_remove(f, (H5HG_t *)&(storage->u.virt.serial_list_hobjid)) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTREMOVE, FAIL, "unable to remove heap object")
     } /* end if */
 
@@ -733,7 +863,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_delete */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_open_source_dset
  *
@@ -749,11 +879,10 @@ done:
 static herr_t
 H5D__virtual_open_source_dset(const H5D_t *vdset,
     H5O_storage_virtual_ent_t *virtual_ent,
-    H5O_storage_virtual_srcdset_t *source_dset, hid_t dxpl_id)
+    H5O_storage_virtual_srcdset_t *source_dset)
 {
     H5F_t       *src_file = NULL;       /* Source file */
     hbool_t     src_file_open = FALSE;  /* Whether we have opened and need to close src_file */
-    H5G_loc_t   src_root_loc;           /* Object location of source file root group */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
@@ -767,28 +896,42 @@ H5D__virtual_open_source_dset(const H5D_t *vdset,
 
     /* Check if we need to open the source file */
     if(HDstrcmp(source_dset->file_name, ".")) {
-        /* Open the source file */
-        if(NULL == (src_file = H5F_open(source_dset->file_name, H5F_INTENT(vdset->oloc.file) & (H5F_ACC_RDWR | H5F_ACC_SWMR_WRITE | H5F_ACC_SWMR_READ), H5P_FILE_CREATE_DEFAULT, vdset->shared->layout.storage.u.virt.source_fapl, dxpl_id)))
-            H5E_clear_stack(NULL); /* Quick hack until proper support for H5Fopen with missing file is implemented */
-        else
+        unsigned    intent;                 /* File access permissions */
+
+        /* Get the virtual dataset's file open flags ("intent") */
+        intent = H5F_INTENT(vdset->oloc.file);
+
+        /* Try opening the file */
+        src_file = H5F_prefix_open_file(vdset->oloc.file, H5F_PREFIX_VDS, vdset->shared->vds_prefix, source_dset->file_name, intent, vdset->shared->layout.storage.u.virt.source_fapl);
+
+        /* If we opened the source file here, we should close it when leaving */
+        if(src_file)
             src_file_open = TRUE;
+        else
+            /* Reset the error stack */
+            H5E_clear_stack(NULL);
     } /* end if */
     else
         /* Source file is ".", use the virtual dataset's file */
         src_file = vdset->oloc.file;
 
     if(src_file) {
+        H5G_loc_t   src_root_loc;           /* Object location of source file root group */
+
         /* Set up the root group in the destination file */
         if(NULL == (src_root_loc.oloc = H5G_oloc(H5G_rootof(src_file))))
             HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "unable to get object location for root group")
         if(NULL == (src_root_loc.path = H5G_nameof(H5G_rootof(src_file))))
             HGOTO_ERROR(H5E_DATASET, H5E_BADVALUE, FAIL, "unable to get path for root group")
 
-        /* Open the source dataset */
-        if(NULL == (source_dset->dset = H5D__open_name(&src_root_loc, source_dset->dset_name, vdset->shared->layout.storage.u.virt.source_dapl, dxpl_id))) {
-            H5E_clear_stack(NULL); /* Quick hack until proper support for H5Dopen with missing file is implemented */
+        /* Try opening the source dataset */
+        source_dset->dset = H5D__open_name(&src_root_loc, source_dset->dset_name, vdset->shared->layout.storage.u.virt.source_dapl);
+
+        /* Dataset does not exist */
+        if(NULL == source_dset->dset) {
+            /* Reset the error stack */
+            H5E_clear_stack(NULL);
 
-            /* Dataset does not exist */
             source_dset->dset_exists = FALSE;
         } /* end if */
         else {
@@ -805,15 +948,15 @@ H5D__virtual_open_source_dset(const H5D_t *vdset,
     } /* end if */
 
 done:
-    /* Close source file */
+    /* Release resources */
     if(src_file_open)
-        if(H5F_try_close(src_file, NULL) < 0)
+        if(H5F_efc_close(vdset->oloc.file, src_file) < 0)
             HDONE_ERROR(H5E_DATASET, H5E_CANTCLOSEFILE, FAIL, "can't close source file")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_open_source_dset() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_reset_source_dset
  *
@@ -900,7 +1043,7 @@ H5D__virtual_reset_source_dset(H5O_storage_virtual_ent_t *virtual_ent,
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_reset_source_dset() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_str_append
  *
@@ -976,7 +1119,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value);
 } /* end H5D__virtual_str_append() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D_virtual_parse_source_name
  *
@@ -1092,7 +1235,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D_virtual_parse_source_name() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_copy_parsed_name
  *
@@ -1149,7 +1292,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_copy_parsed_name() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D_virtual_free_parsed_name
  *
@@ -1182,7 +1325,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D_virtual_free_parsed_name() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_build_source_name
  *
@@ -1284,7 +1427,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_build_source_name() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_set_extent_unlim
  *
@@ -1301,7 +1444,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__virtual_set_extent_unlim(const H5D_t *dset, hid_t dxpl_id)
+H5D__virtual_set_extent_unlim(const H5D_t *dset)
 {
     H5O_storage_virtual_t *storage;
     hsize_t     new_dims[H5S_MAX_RANK];
@@ -1337,7 +1480,7 @@ H5D__virtual_set_extent_unlim(const H5D_t *dset, hid_t dxpl_id)
                 /* Non-printf mapping */
                 /* Open source dataset */
                 if(!storage->list[i].source_dset.dset)
-                    if(H5D__virtual_open_source_dset(dset, &storage->list[i], &storage->list[i].source_dset, dxpl_id) < 0)
+                    if(H5D__virtual_open_source_dset(dset, &storage->list[i], &storage->list[i].source_dset) < 0)
                         HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open source dataset")
 
                 /* Check if source dataset is open */
@@ -1409,7 +1552,7 @@ H5D__virtual_set_extent_unlim(const H5D_t *dset, hid_t dxpl_id)
                                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCLIP, FAIL, "failed to clip unlimited selection")
                         } /* end if */
 
-                        /* Update cached values unlim_extent_source and 
+                        /* Update cached values unlim_extent_source and
                          * clip_size_virtual */
                         storage->list[i].unlim_extent_source = curr_dims[storage->list[i].unlim_dim_source];
                         storage->list[i].clip_size_virtual = clip_size;
@@ -1475,7 +1618,7 @@ H5D__virtual_set_extent_unlim(const H5D_t *dset, hid_t dxpl_id)
                             storage->list[i].sub_dset[j].clipped_virtual_select = storage->list[i].sub_dset[j].virtual_select;
 
                         /* Open source dataset */
-                        if(H5D__virtual_open_source_dset(dset, &storage->list[i], &storage->list[i].sub_dset[j], dxpl_id) < 0)
+                        if(H5D__virtual_open_source_dset(dset, &storage->list[i], &storage->list[i].sub_dset[j]) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open source dataset")
 
                         if(storage->list[i].sub_dset[j].dset) {
@@ -1561,8 +1704,8 @@ H5D__virtual_set_extent_unlim(const H5D_t *dset, hid_t dxpl_id)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to modify size of dataspace")
 
         /* Mark the space as dirty, for later writing to the file */
-        if(H5F_INTENT(dset->oloc.file) & H5F_ACC_RDWR) 
-            if(H5D__mark(dset, dxpl_id, H5D_MARK_SPACE) < 0)
+        if(H5F_INTENT(dset->oloc.file) & H5F_ACC_RDWR)
+            if(H5D__mark(dset, H5D_MARK_SPACE) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "unable to mark dataspace as dirty")
     } /* end if */
 
@@ -1712,7 +1855,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_set_extent_unlim() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_init_all
  *
@@ -1729,7 +1872,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__virtual_init_all(const H5D_t *dset, hid_t dxpl_id)
+H5D__virtual_init_all(const H5D_t *dset)
 {
     H5O_storage_virtual_t *storage;
     hsize_t     virtual_dims[H5S_MAX_RANK];
@@ -1759,7 +1902,7 @@ H5D__virtual_init_all(const H5D_t *dset, hid_t dxpl_id)
                 /* Non-printf mapping */
                 /* Open source dataset */
                 if(!storage->list[i].source_dset.dset)
-                    if(H5D__virtual_open_source_dset(dset, &storage->list[i], &storage->list[i].source_dset, dxpl_id) < 0)
+                    if(H5D__virtual_open_source_dset(dset, &storage->list[i], &storage->list[i].source_dset) < 0)
                         HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open source dataset")
 
                 /* Check if source dataset is open */
@@ -1936,7 +2079,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_init_all() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_init
  *
@@ -1951,8 +2094,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__virtual_init(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, const H5D_t *dset,
-    hid_t dapl_id)
+H5D__virtual_init(H5F_t *f, const H5D_t *dset, hid_t dapl_id)
 {
     H5O_storage_virtual_t *storage;     /* Convenience pointer */
     H5P_genplist_t *dapl;               /* Data access property list object pointer */
@@ -2031,7 +2173,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_init() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_is_space_alloc
  *
@@ -2063,7 +2205,7 @@ H5D__virtual_is_space_alloc(const H5O_storage_t H5_ATTR_UNUSED *storage)
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_is_space_alloc() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_pre_io
  *
@@ -2102,7 +2244,7 @@ H5D__virtual_pre_io(H5D_io_info_t *io_info,
 
     /* Initialize layout if necessary */
     if(!storage->init)
-        if(H5D__virtual_init_all(io_info->dset, io_info->md_dxpl_id) < 0)
+        if(H5D__virtual_init_all(io_info->dset) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "can't initialize virtual layout")
 
     /* Initialize tot_nelmts */
@@ -2160,7 +2302,7 @@ H5D__virtual_pre_io(H5D_io_info_t *io_info,
                      * open the source dataset to patch it */
                     if(storage->list[i].source_space_status != H5O_VIRTUAL_STATUS_CORRECT) {
                         HDassert(!storage->list[i].sub_dset[j].dset);
-                        if(H5D__virtual_open_source_dset(io_info->dset, &storage->list[i], &storage->list[i].sub_dset[j], io_info->md_dxpl_id) < 0)
+                        if(H5D__virtual_open_source_dset(io_info->dset, &storage->list[i], &storage->list[i].sub_dset[j]) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open source dataset")
                     } /* end if */
 
@@ -2232,7 +2374,7 @@ H5D__virtual_pre_io(H5D_io_info_t *io_info,
                         /* Open source dataset */
                         if(!storage->list[i].sub_dset[j].dset)
                             /* Try to open dataset */
-                            if(H5D__virtual_open_source_dset(io_info->dset, &storage->list[i], &storage->list[i].sub_dset[j], io_info->md_dxpl_id) < 0)
+                            if(H5D__virtual_open_source_dset(io_info->dset, &storage->list[i], &storage->list[i].sub_dset[j]) < 0)
                                 HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open source dataset")
 
                         /* If the source dataset is not open, mark the selected
@@ -2248,7 +2390,7 @@ H5D__virtual_pre_io(H5D_io_info_t *io_info,
                             HGOTO_ERROR(H5E_DATASET, H5E_CLOSEERROR, FAIL, "can't close projected memory space")
                         storage->list[i].sub_dset[j].projected_mem_space = NULL;
                     } /* end if */
-                    else 
+                    else
                         *tot_nelmts += (hsize_t)select_nelmts;
                 } /* end if */
             } /* end for */
@@ -2267,9 +2409,9 @@ H5D__virtual_pre_io(H5D_io_info_t *io_info,
                 /* Check if anything is selected */
                 if(select_nelmts > (hssize_t)0) {
                     /* Open source dataset */
-                    if(!storage->list[i].source_dset.dset) 
+                    if(!storage->list[i].source_dset.dset)
                         /* Try to open dataset */
-                        if(H5D__virtual_open_source_dset(io_info->dset, &storage->list[i], &storage->list[i].source_dset, io_info->md_dxpl_id) < 0)
+                        if(H5D__virtual_open_source_dset(io_info->dset, &storage->list[i], &storage->list[i].source_dset) < 0)
                             HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open source dataset")
 
                     /* If the source dataset is not open, mark the selected elements
@@ -2304,7 +2446,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_pre_io() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_post_io
  *
@@ -2354,7 +2496,7 @@ H5D__virtual_post_io(H5O_storage_virtual_t *storage)
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_post_io() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_read_one
  *
@@ -2391,7 +2533,7 @@ H5D__virtual_read_one(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLIP, FAIL, "can't project virtual intersection onto source space")
 
         /* Perform read on source dataset */
-        if(H5D__read(source_dset->dset, type_info->dst_type_id, source_dset->projected_mem_space, projected_src_space, io_info->raw_dxpl_id, io_info->u.rbuf) < 0)
+        if(H5D__read(source_dset->dset, type_info->dst_type_id, source_dset->projected_mem_space, projected_src_space, io_info->u.rbuf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "can't read source dataset")
 
         /* Close projected_src_space */
@@ -2411,7 +2553,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_read_one() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_read
  *
@@ -2508,8 +2650,7 @@ H5D__virtual_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
                             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLIP, FAIL, "unable to clip fill selection")
 
             /* Write fill values to memory buffer */
-            if(H5D__fill(io_info->dset->shared->dcpl_cache.fill.buf, io_info->dset->shared->type, io_info->u.rbuf, 
-                         type_info->mem_type, fill_space, io_info->md_dxpl_id) < 0)
+            if(H5D__fill(io_info->dset->shared->dcpl_cache.fill.buf, io_info->dset->shared->type, io_info->u.rbuf, type_info->mem_type, fill_space) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "filling buf failed")
 
 #ifndef NDEBUG
@@ -2544,7 +2685,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_read() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_write_one
  *
@@ -2583,7 +2724,7 @@ H5D__virtual_write_one(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
             HGOTO_ERROR(H5E_DATASET, H5E_CANTCLIP, FAIL, "can't project virtual intersection onto source space")
 
         /* Perform write on source dataset */
-        if(H5D__write(source_dset->dset, type_info->dst_type_id, source_dset->projected_mem_space, projected_src_space, io_info->raw_dxpl_id, io_info->u.wbuf) < 0)
+        if(H5D__write(source_dset->dset, type_info->dst_type_id, source_dset->projected_mem_space, projected_src_space, io_info->u.wbuf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "can't write to source dataset")
 
         /* Close projected_src_space */
@@ -2603,7 +2744,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_write_one() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_write
  *
@@ -2680,7 +2821,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_write() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_flush
  *
@@ -2694,7 +2835,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__virtual_flush(H5D_t *dset, hid_t dxpl_id)
+H5D__virtual_flush(H5D_t *dset)
 {
     H5O_storage_virtual_t *storage;         /* Convenient pointer into layout struct */
     size_t      i, j;                       /* Local index variables */
@@ -2715,20 +2856,20 @@ H5D__virtual_flush(H5D_t *dset, hid_t dxpl_id)
             for(j = 0; j < storage->list[i].sub_dset_nused; j++)
                 if(storage->list[i].sub_dset[j].dset)
                     /* Flush source dataset */
-                    if(H5D__flush_real(storage->list[i].sub_dset[j].dset, dxpl_id) < 0)
+                    if(H5D__flush_real(storage->list[i].sub_dset[j].dset) < 0)
                         HGOTO_ERROR(H5E_DATASET, H5E_WRITEERROR, FAIL, "unable to flush source dataset")
         } /* end if */
         else
             if(storage->list[i].source_dset.dset)
                 /* Flush source dataset */
-                if(H5D__flush_real(storage->list[i].source_dset.dset, dxpl_id) < 0)
+                if(H5D__flush_real(storage->list[i].source_dset.dset) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "unable to flush source dataset")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_flush() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_hold_source_dset_files
  *
@@ -2796,17 +2937,15 @@ H5D__virtual_hold_source_dset_files(const H5D_t *dset, H5D_virtual_held_file_t *
             } /* end if */
 
 done:
-    if(ret_value < 0) {
+    if(ret_value < 0)
         /* Release hold on files and delete list on error */
-        if(*head)
-            if(H5D__virtual_release_source_dset_files(*head) < 0)
-                HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "can't release source datasets' files held open")
-    } /* end if */
+        if(*head && H5D__virtual_release_source_dset_files(*head) < 0)
+            HDONE_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "can't release source datasets' files held open")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_hold_source_dset_files() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_refresh_source_dset
  *
@@ -2820,7 +2959,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5D__virtual_refresh_source_dset(H5D_t **dset, hid_t dxpl_id)
+H5D__virtual_refresh_source_dset(H5D_t **dset)
 {
     hid_t       dset_id;                /* Temporary dataset identifier */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -2835,7 +2974,7 @@ H5D__virtual_refresh_source_dset(H5D_t **dset, hid_t dxpl_id)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register source dataset ID")
 
     /* Refresh source dataset */
-    if(H5D__refresh(dset_id, *dset, dxpl_id) < 0)
+    if(H5D__refresh(dset_id, *dset) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to refresh source dataset")
 
     /* Discard the identifier & replace the dataset */
@@ -2846,7 +2985,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_refresh_source_dsets() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_refresh_source_dsets
  *
@@ -2860,7 +2999,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5D__virtual_refresh_source_dsets(H5D_t *dset, hid_t dxpl_id)
+H5D__virtual_refresh_source_dsets(H5D_t *dset)
 {
     H5O_storage_virtual_t *storage;         /* Convenient pointer into layout struct */
     size_t      i;                          /* Local index variable */
@@ -2885,21 +3024,21 @@ H5D__virtual_refresh_source_dsets(H5D_t *dset, hid_t dxpl_id)
                 /* Check if sub-source dataset is open */
                 if(storage->list[i].sub_dset[j].dset)
                     /* Refresh sub-source dataset */
-                    if(H5D__virtual_refresh_source_dset(&storage->list[i].sub_dset[j].dset, dxpl_id) < 0)
+                    if(H5D__virtual_refresh_source_dset(&storage->list[i].sub_dset[j].dset) < 0)
                         HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to refresh source dataset")
         } /* end if */
         else
             /* Check if source dataset is open */
             if(storage->list[i].source_dset.dset)
                 /* Refresh source dataset */
-                if(H5D__virtual_refresh_source_dset(&storage->list[i].source_dset.dset, dxpl_id) < 0)
+                if(H5D__virtual_refresh_source_dset(&storage->list[i].source_dset.dset) < 0)
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to refresh source dataset")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5D__virtual_refresh_source_dsets() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5D__virtual_release_source_dset_files
  *
diff --git a/src/H5E.c b/src/H5E.c
index aa4511b..eecf6e7 100644
--- a/src/H5E.c
+++ b/src/H5E.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -1344,7 +1342,7 @@ done:
  * Programmer:	Quincey Koziol
  *		Monday, October 18, 1999
  *
- * Notes: 	Basically a new public API wrapper around the H5E_push_stack
+ * Notes: 	Basically a new public API wrapper around the H5E__push_stack
  *              function.
  *
  *-------------------------------------------------------------------------
@@ -1415,7 +1413,7 @@ H5Epush2(hid_t err_stack, const char *file, const char *func, unsigned line,
 #endif /* H5_HAVE_VASPRINTF */
 
     /* Push the error on the stack */
-    if(H5E_push_stack(estack, file, func, line, cls_id, maj_id, min_id, tmp) < 0)
+    if(H5E__push_stack(estack, file, func, line, cls_id, maj_id, min_id, tmp) < 0)
         HGOTO_ERROR(H5E_ERROR, H5E_CANTSET, FAIL, "can't push error on stack")
 
 done:
diff --git a/src/H5EA.c b/src/H5EA.c
index e35a4ed..9ceb144 100644
--- a/src/H5EA.c
+++ b/src/H5EA.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -61,8 +59,7 @@
 /******************/
 
 /* Typedef for generically unprotecting an object */
-typedef herr_t (*H5EA__unprotect_func_t)(void *thing, hid_t dxpl_id,
-    unsigned cache_flags);
+typedef herr_t (*H5EA__unprotect_func_t)(void *thing, unsigned cache_flags);
 
 
 /********************/
@@ -75,11 +72,11 @@ typedef herr_t (*H5EA__unprotect_func_t)(void *thing, hid_t dxpl_id,
 /********************/
 
 static herr_t
-H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_extend,
+H5EA__lookup_elmt(const H5EA_t *ea, hsize_t idx, hbool_t will_extend,
     unsigned thing_acc, void **thing, uint8_t **thing_elmt_buf,
     hsize_t *thing_elmt_idx, H5EA__unprotect_func_t *thing_unprot_func);
-static H5EA_t *H5EA__new(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr,
-    hbool_t from_open, void *ctx_udata);
+static H5EA_t *H5EA__new(H5F_t *f, haddr_t ea_addr, hbool_t from_open,
+    void *ctx_udata);
 
 
 /*********************/
@@ -133,7 +130,7 @@ H5FL_BLK_DEFINE(ea_native_elmt);
  */
 BEGIN_FUNC(STATIC, ERR,
 H5EA_t *, NULL, NULL,
-H5EA__new(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, hbool_t from_open, void *ctx_udata))
+H5EA__new(H5F_t *f, haddr_t ea_addr, hbool_t from_open, void *ctx_udata))
 
     /* Local variables */
     H5EA_t *ea = NULL;          /* Pointer to new extensible array */
@@ -150,7 +147,7 @@ H5EA__new(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, hbool_t from_open, void *ctx
 	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for extensible array info")
 
     /* Lock the array header into memory */
-    if(NULL == (hdr = H5EA__hdr_protect(f, dxpl_id, ea_addr, ctx_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5EA__hdr_protect(f, ea_addr, ctx_udata, H5AC__READ_ONLY_FLAG)))
 	H5E_THROW(H5E_CANTPROTECT, "unable to load extensible array header")
 
     /* Check for pending array deletion */
@@ -174,10 +171,10 @@ H5EA__new(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, hbool_t from_open, void *ctx
 
 CATCH
 
-    if(hdr && H5EA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5EA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
     if(!ret_value)
-        if(ea && H5EA_close(ea, dxpl_id) < 0)
+        if(ea && H5EA_close(ea) < 0)
             H5E_THROW(H5E_CLOSEERROR, "unable to close extensible array")
 
 END_FUNC(STATIC)  /* end H5EA__new() */
@@ -199,7 +196,7 @@ END_FUNC(STATIC)  /* end H5EA__new() */
  */
 BEGIN_FUNC(PRIV, ERR,
 H5EA_t *, NULL, NULL,
-H5EA_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam, void *ctx_udata))
+H5EA_create(H5F_t *f, const H5EA_create_t *cparam, void *ctx_udata))
 
     /* Local variables */
     H5EA_t *ea = NULL;          /* Pointer to new extensible array */
@@ -215,11 +212,11 @@ H5EA_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam, void *ctx_udat
     HDcompile_assert(H5EA_NUM_CLS_ID == NELMTS(H5EA_client_class_g));
 
     /* Create extensible array header */
-    if(HADDR_UNDEF == (ea_addr = H5EA__hdr_create(f, dxpl_id, cparam, ctx_udata)))
+    if(HADDR_UNDEF == (ea_addr = H5EA__hdr_create(f, cparam, ctx_udata)))
 	H5E_THROW(H5E_CANTINIT, "can't create extensible array header")
 
     /* Allocate and initialize new extensible array wrapper */
-    if(NULL == (ea = H5EA__new(f, dxpl_id, ea_addr, FALSE, ctx_udata)))
+    if(NULL == (ea = H5EA__new(f, ea_addr, FALSE, ctx_udata)))
 	H5E_THROW(H5E_CANTINIT, "allocation and/or initialization failed for extensible array wrapper")
 
     /* Set the return value */
@@ -228,7 +225,7 @@ H5EA_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam, void *ctx_udat
 CATCH
 
     if(!ret_value)
-        if(ea && H5EA_close(ea, dxpl_id) < 0)
+        if(ea && H5EA_close(ea) < 0)
             H5E_THROW(H5E_CLOSEERROR, "unable to close extensible array")
 
 END_FUNC(PRIV)  /* end H5EA_create() */
@@ -250,7 +247,7 @@ END_FUNC(PRIV)  /* end H5EA_create() */
  */
 BEGIN_FUNC(PRIV, ERR,
 H5EA_t *, NULL, NULL,
-H5EA_open(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata))
+H5EA_open(H5F_t *f, haddr_t ea_addr, void *ctx_udata))
 
     /* Local variables */
     H5EA_t *ea = NULL;          /* Pointer to new extensible array wrapper */
@@ -262,7 +259,7 @@ H5EA_open(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata))
     HDassert(H5F_addr_defined(ea_addr));
 
     /* Allocate and initialize new extensible array wrapper */
-    if(NULL == (ea = H5EA__new(f, dxpl_id, ea_addr, TRUE, ctx_udata)))
+    if(NULL == (ea = H5EA__new(f, ea_addr, TRUE, ctx_udata)))
 	H5E_THROW(H5E_CANTINIT, "allocation and/or initialization failed for extensible array wrapper")
 
     /* Set the return value */
@@ -271,7 +268,7 @@ H5EA_open(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata))
 CATCH
 
     if(!ret_value)
-        if(ea && H5EA_close(ea, dxpl_id) < 0)
+        if(ea && H5EA_close(ea) < 0)
             H5E_THROW(H5E_CLOSEERROR, "unable to close extensible array")
 
 END_FUNC(PRIV)  /* end H5EA_open() */
@@ -356,7 +353,7 @@ END_FUNC(PRIV)  /* end H5EA_get_addr() */
  */
 BEGIN_FUNC(STATIC, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_extend,
+H5EA__lookup_elmt(const H5EA_t *ea, hsize_t idx, hbool_t will_extend,
     unsigned thing_acc, void **thing, uint8_t **thing_elmt_buf,
     hsize_t *thing_elmt_idx, H5EA__unprotect_func_t *thing_unprot_func))
 
@@ -397,7 +394,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
         /* Check if we are allowed to create the thing */
         if(0 == (thing_acc & H5AC__READ_ONLY_FLAG)) { /* i.e. r/w access */
             /* Create the index block */
-            hdr->idx_blk_addr = H5EA__iblock_create(hdr, dxpl_id, &stats_changed);
+            hdr->idx_blk_addr = H5EA__iblock_create(hdr, &stats_changed);
             if(!H5F_addr_defined(hdr->idx_blk_addr))
                 H5E_THROW(H5E_CANTCREATE, "unable to create index block")
             hdr_dirty = TRUE;
@@ -407,7 +404,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
     } /* end if */
 
     /* Protect index block */
-    if(NULL == (iblock = H5EA__iblock_protect(hdr, dxpl_id, thing_acc)))
+    if(NULL == (iblock = H5EA__iblock_protect(hdr, thing_acc)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array index block, address = %llu", (unsigned long long)hdr->idx_blk_addr)
 
     /* Check if element is in index block */
@@ -444,7 +441,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
 
                     /* Create data block */
                     dblk_off = hdr->sblk_info[sblk_idx].start_idx + (dblk_idx * hdr->sblk_info[sblk_idx].dblk_nelmts);
-                    dblk_addr = H5EA__dblock_create(hdr, dxpl_id, iblock, &stats_changed, dblk_off, hdr->sblk_info[sblk_idx].dblk_nelmts);
+                    dblk_addr = H5EA__dblock_create(hdr, iblock, &stats_changed, dblk_off, hdr->sblk_info[sblk_idx].dblk_nelmts);
                     if(!H5F_addr_defined(dblk_addr))
                         H5E_THROW(H5E_CANTCREATE, "unable to create extensible array data block")
 
@@ -457,7 +454,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
             } /* end if */
 
             /* Protect data block */
-            if(NULL == (dblock = H5EA__dblock_protect(hdr, dxpl_id, iblock, iblock->dblk_addrs[dblk_idx], hdr->sblk_info[sblk_idx].dblk_nelmts, thing_acc)))
+            if(NULL == (dblock = H5EA__dblock_protect(hdr, iblock, iblock->dblk_addrs[dblk_idx], hdr->sblk_info[sblk_idx].dblk_nelmts, thing_acc)))
                 H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array data block, address = %llu", (unsigned long long)iblock->dblk_addrs[dblk_idx])
 
             /* Adjust index to offset in data block */
@@ -489,7 +486,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
                     haddr_t sblk_addr;        /* Address of data block created */
 
                     /* Create super block */
-                    sblk_addr = H5EA__sblock_create(hdr, dxpl_id, iblock, &stats_changed, sblk_idx);
+                    sblk_addr = H5EA__sblock_create(hdr, iblock, &stats_changed, sblk_idx);
                     if(!H5F_addr_defined(sblk_addr))
                         H5E_THROW(H5E_CANTCREATE, "unable to create extensible array super block")
 
@@ -502,7 +499,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
             } /* end if */
 
             /* Protect super block */
-            if(NULL == (sblock = H5EA__sblock_protect(hdr, dxpl_id, iblock, iblock->sblk_addrs[sblk_off], sblk_idx, thing_acc)))
+            if(NULL == (sblock = H5EA__sblock_protect(hdr, iblock, iblock->sblk_addrs[sblk_off], sblk_idx, thing_acc)))
                 H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array super block, address = %llu", (unsigned long long)iblock->sblk_addrs[sblk_off])
 
             /* Compute the data block index in super block */
@@ -518,7 +515,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
 
                     /* Create data block */
                     dblk_off = hdr->sblk_info[sblk_idx].start_idx + (dblk_idx * hdr->sblk_info[sblk_idx].dblk_nelmts);
-                    dblk_addr = H5EA__dblock_create(hdr, dxpl_id, sblock, &stats_changed, dblk_off, sblock->dblk_nelmts);
+                    dblk_addr = H5EA__dblock_create(hdr, sblock, &stats_changed, dblk_off, sblock->dblk_nelmts);
                     if(!H5F_addr_defined(dblk_addr))
                         H5E_THROW(H5E_CANTCREATE, "unable to create extensible array data block")
 
@@ -565,7 +562,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
                     /* Check if we are allowed to create the thing */
                     if(0 == (thing_acc & H5AC__READ_ONLY_FLAG)) { /* i.e. r/w access */
                         /* Create the data block page */
-                        if(H5EA__dblk_page_create(hdr, dxpl_id, sblock, dblk_page_addr) < 0)
+                        if(H5EA__dblk_page_create(hdr, sblock, dblk_page_addr) < 0)
                             H5E_THROW(H5E_CANTCREATE, "unable to create data block page")
 
                         /* Mark data block page as initialized in super block */
@@ -577,7 +574,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
                 } /* end if */
 
                 /* Protect data block page */
-                if(NULL == (dblk_page = H5EA__dblk_page_protect(hdr, dxpl_id, sblock, dblk_page_addr, thing_acc)))
+                if(NULL == (dblk_page = H5EA__dblk_page_protect(hdr, sblock, dblk_page_addr, thing_acc)))
                     H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
                 /* Check if there is already a dependency on the header */
@@ -595,7 +592,7 @@ H5EA__lookup_elmt(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, hbool_t will_ext
             } /* end if */
             else {
                 /* Protect data block */
-                if(NULL == (dblock = H5EA__dblock_protect(hdr, dxpl_id, sblock, sblock->dblk_addrs[dblk_idx], sblock->dblk_nelmts, thing_acc)))
+                if(NULL == (dblock = H5EA__dblock_protect(hdr, sblock, sblock->dblk_addrs[dblk_idx], sblock->dblk_nelmts, thing_acc)))
                     H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array data block, address = %llu", (unsigned long long)sblock->dblk_addrs[dblk_idx])
 
                 /* Check if there is already a dependency on the header */
@@ -637,14 +634,14 @@ CATCH
             H5E_THROW(H5E_CANTMARKDIRTY, "unable to mark extensible array header as modified")
 
     /* Release resources */
-    if(iblock && *thing != iblock && H5EA__iblock_unprotect(iblock, dxpl_id, iblock_cache_flags) < 0)
+    if(iblock && *thing != iblock && H5EA__iblock_unprotect(iblock, iblock_cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array index block")
     /* (Note: super blocks don't contain elements, so don't have a '*thing != sblock' check) */
-    if(sblock && H5EA__sblock_unprotect(sblock, dxpl_id, sblock_cache_flags) < 0)
+    if(sblock && H5EA__sblock_unprotect(sblock, sblock_cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array super block")
-    if(dblock && *thing != dblock && H5EA__dblock_unprotect(dblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(dblock && *thing != dblock && H5EA__dblock_unprotect(dblock, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array data block")
-    if(dblk_page && *thing != dblk_page && H5EA__dblk_page_unprotect(dblk_page, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(dblk_page && *thing != dblk_page && H5EA__dblk_page_unprotect(dblk_page, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array data block page")
 
 END_FUNC(STATIC)  /* end H5EA__lookup_elmt() */
@@ -665,7 +662,7 @@ END_FUNC(STATIC)  /* end H5EA__lookup_elmt() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA_set(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, const void *elmt))
+H5EA_set(const H5EA_t *ea, hsize_t idx, const void *elmt))
 
     /* Local variables */
     H5EA_hdr_t *hdr = ea->hdr;          /* Header for EA */
@@ -687,7 +684,7 @@ H5EA_set(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, const void *elmt))
 
     /* Look up the array metadata containing the element we want to set */
     will_extend = (idx >= hdr->stats.stored.max_idx_set);
-    if(H5EA__lookup_elmt(ea, dxpl_id, idx, will_extend, H5AC__NO_FLAGS_SET, &thing, &thing_elmt_buf, &thing_elmt_idx, &thing_unprot_func) < 0)
+    if(H5EA__lookup_elmt(ea, idx, will_extend, H5AC__NO_FLAGS_SET, &thing, &thing_elmt_buf, &thing_elmt_idx, &thing_unprot_func) < 0)
         H5E_THROW(H5E_CANTPROTECT, "unable to protect array metadata")
 
     /* Sanity check */
@@ -709,7 +706,7 @@ H5EA_set(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, const void *elmt))
 
 CATCH
     /* Release resources */
-    if(thing && (thing_unprot_func)(thing, dxpl_id, thing_cache_flags) < 0)
+    if(thing && (thing_unprot_func)(thing, thing_cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array metadata")
 
 END_FUNC(PRIV)  /* end H5EA_set() */
@@ -730,7 +727,7 @@ END_FUNC(PRIV)  /* end H5EA_set() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA_get(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, void *elmt))
+H5EA_get(const H5EA_t *ea, hsize_t idx, void *elmt))
 
     /* Local variables */
     H5EA_hdr_t *hdr = ea->hdr;          /* Header for EA */
@@ -757,7 +754,7 @@ H5EA_get(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, void *elmt))
         hdr->f = ea->f;
 
         /* Look up the array metadata containing the element we want to set */
-        if(H5EA__lookup_elmt(ea, dxpl_id, idx, FALSE, H5AC__READ_ONLY_FLAG, &thing, &thing_elmt_buf, &thing_elmt_idx, &thing_unprot_func) < 0)
+        if(H5EA__lookup_elmt(ea, idx, FALSE, H5AC__READ_ONLY_FLAG, &thing, &thing_elmt_buf, &thing_elmt_idx, &thing_unprot_func) < 0)
             H5E_THROW(H5E_CANTPROTECT, "unable to protect array metadata")
 
         /* Check if the thing holding the element has been created yet */
@@ -773,7 +770,7 @@ H5EA_get(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, void *elmt))
 
 CATCH
     /* Release thing */
-    if(thing && (thing_unprot_func)(thing, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(thing && (thing_unprot_func)(thing, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array metadata")
 
 END_FUNC(PRIV)  /* end H5EA_get() */
@@ -795,7 +792,7 @@ END_FUNC(PRIV)  /* end H5EA_get() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA_depend(H5EA_t *ea, hid_t dxpl_id, H5AC_proxy_entry_t *parent))
+H5EA_depend(H5EA_t *ea, H5AC_proxy_entry_t *parent))
 
     /* Local variables */
     H5EA_hdr_t *hdr = ea->hdr;          /* Header for EA */
@@ -820,7 +817,7 @@ H5EA_depend(H5EA_t *ea, hid_t dxpl_id, H5AC_proxy_entry_t *parent))
         hdr->f = ea->f;
 
         /* Add the extensible array as a child of the parent (proxy) */
-        if(H5AC_proxy_entry_add_child(parent, hdr->f, dxpl_id, hdr->top_proxy) < 0)
+        if(H5AC_proxy_entry_add_child(parent, hdr->f, hdr->top_proxy) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array as child of proxy")
         hdr->parent = parent;
     } /* end if */
@@ -845,7 +842,7 @@ END_FUNC(PRIV)  /* end H5EA_depend() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA_close(H5EA_t *ea, hid_t dxpl_id))
+H5EA_close(H5EA_t *ea))
 
     /* Local variables */
     hbool_t pending_delete = FALSE;     /* Whether the array is pending deletion */
@@ -896,7 +893,7 @@ H5EA_close(H5EA_t *ea, hid_t dxpl_id))
 
             /* Lock the array header into memory */
             /* (OK to pass in NULL for callback context, since we know the header must be in the cache) */
-            if(NULL == (hdr = H5EA__hdr_protect(ea->f, dxpl_id, ea_addr, NULL, H5AC__NO_FLAGS_SET)))
+            if(NULL == (hdr = H5EA__hdr_protect(ea->f, ea_addr, NULL, H5AC__NO_FLAGS_SET)))
                 H5E_THROW(H5E_CANTLOAD, "unable to load extensible array header")
 
             /* Set the shared array header's file context for this operation */
@@ -910,7 +907,7 @@ H5EA_close(H5EA_t *ea, hid_t dxpl_id))
                 H5E_THROW(H5E_CANTDEC, "can't decrement reference count on shared array header")
 
             /* Delete array, starting with header (unprotects header) */
-            if(H5EA__hdr_delete(hdr, dxpl_id) < 0)
+            if(H5EA__hdr_delete(hdr) < 0)
                 H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array")
         } /* end if */
         else {
@@ -946,7 +943,7 @@ END_FUNC(PRIV)  /* end H5EA_close() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA_delete(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata))
+H5EA_delete(H5F_t *f, haddr_t ea_addr, void *ctx_udata))
 
     /* Local variables */
     H5EA_hdr_t *hdr = NULL;             /* The fractal heap header information */
@@ -958,7 +955,7 @@ H5EA_delete(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata))
     HDassert(H5F_addr_defined(ea_addr));
 
     /* Lock the array header into memory */
-    if(NULL == (hdr = H5EA__hdr_protect(f, dxpl_id, ea_addr, ctx_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (hdr = H5EA__hdr_protect(f, ea_addr, ctx_udata, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array header, address = %llu", (unsigned long long)ea_addr)
 
     /* Check for files using shared array header */
@@ -969,7 +966,7 @@ H5EA_delete(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata))
         hdr->f = f;
 
         /* Delete array now, starting with header (unprotects header) */
-        if(H5EA__hdr_delete(hdr, dxpl_id) < 0)
+        if(H5EA__hdr_delete(hdr) < 0)
             H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array")
         hdr = NULL;
     } /* end if */
@@ -977,7 +974,7 @@ H5EA_delete(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata))
 CATCH
 
     /* Unprotect the header, if an error occurred */
-    if(hdr && H5EA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5EA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
 
 END_FUNC(PRIV)  /* end H5EA_delete() */
@@ -997,7 +994,7 @@ END_FUNC(PRIV)  /* end H5EA_delete() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA_iterate(H5EA_t *ea, hid_t dxpl_id, H5EA_operator_t op, void *udata))
+H5EA_iterate(H5EA_t *ea, H5EA_operator_t op, void *udata))
 
     /* Local variables */
     uint8_t     *elmt = NULL;
@@ -1019,7 +1016,7 @@ H5EA_iterate(H5EA_t *ea, hid_t dxpl_id, H5EA_operator_t op, void *udata))
         int cb_ret;     /* Return value from callback */
 
         /* Get array element */
-        if(H5EA_get(ea, dxpl_id, u, elmt) < 0)
+        if(H5EA_get(ea, u, elmt) < 0)
             H5E_THROW(H5E_CANTGET, "unable to delete fixed array")
 
         /* Make callback */
diff --git a/src/H5EAcache.c b/src/H5EAcache.c
index 894b31a..8138991 100644
--- a/src/H5EAcache.c
+++ b/src/H5EAcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -112,7 +110,7 @@ static herr_t H5EA__cache_dblock_serialize(const H5F_t *f, void *image, size_t l
     void *thing);
 static herr_t H5EA__cache_dblock_notify(H5AC_notify_action_t action, void *thing);
 static herr_t H5EA__cache_dblock_free_icr(void *thing);
-static herr_t H5EA__cache_dblock_fsf_size(const void *thing, size_t *fsf_size);
+static herr_t H5EA__cache_dblock_fsf_size(const void *thing, hsize_t *fsf_size);
 
 static herr_t H5EA__cache_dblk_page_get_initial_load_size(void *udata, size_t *image_len);
 static htri_t H5EA__cache_dblk_page_verify_chksum(const void *image_ptr, size_t len, void *udata_ptr);
@@ -1877,7 +1875,7 @@ END_FUNC(STATIC)   /* end H5EA__cache_dblock_free_icr() */
  */
 BEGIN_FUNC(STATIC, NOERR,
 herr_t, SUCCEED, -,
-H5EA__cache_dblock_fsf_size(const void *_thing, size_t *fsf_size))
+H5EA__cache_dblock_fsf_size(const void *_thing, hsize_t *fsf_size))
 
     /* Local variables */
     const H5EA_dblock_t *dblock = (const H5EA_dblock_t *)_thing;        /* Pointer to the object */
diff --git a/src/H5EAdbg.c b/src/H5EAdbg.c
index ef45881..1a2b973 100644
--- a/src/H5EAdbg.c
+++ b/src/H5EAdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -95,7 +93,7 @@
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+H5EA__hdr_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
     int fwidth, const H5EA_class_t *cls, haddr_t obj_addr))
 
     /* Local variables */
@@ -112,14 +110,13 @@ H5EA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(cls);
 
     /* Check for debugging context callback available */
-    if(cls->crt_dbg_ctx) {
+    if(cls->crt_dbg_ctx)
         /* Create debugging context */
-        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, dxpl_id, obj_addr)))
+        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, obj_addr)))
             H5E_THROW(H5E_CANTGET, "unable to create fixed array debugging context")
-    } /* end if */
 
     /* Load the extensible array header */
-    if(NULL == (hdr = H5EA__hdr_protect(f, dxpl_id, addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5EA__hdr_protect(f, addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
 	H5E_THROW(H5E_CANTPROTECT, "unable to load extensible array header")
 
     /* Print opening message */
@@ -171,7 +168,7 @@ H5EA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
 CATCH
     if(dbg_ctx && cls->dst_dbg_ctx(dbg_ctx) < 0)
         H5E_THROW(H5E_CANTRELEASE, "unable to release extensible array debugging context")
-    if(hdr && H5EA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5EA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
 
 END_FUNC(PKG)   /* end H5EA__hdr_debug() */
@@ -192,7 +189,7 @@ END_FUNC(PKG)   /* end H5EA__hdr_debug() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *stream, int indent,
+H5EA__iblock_debug(H5F_t *f, haddr_t H5_ATTR_UNUSED addr, FILE *stream, int indent,
     int fwidth, const H5EA_class_t *cls, haddr_t hdr_addr, haddr_t obj_addr))
 
     /* Local variables */
@@ -211,21 +208,20 @@ H5EA__iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *s
     HDassert(H5F_addr_defined(obj_addr));
 
     /* Check for debugging context callback available */
-    if(cls->crt_dbg_ctx) {
+    if(cls->crt_dbg_ctx)
         /* Create debugging context */
-        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, dxpl_id, obj_addr)))
+        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, obj_addr)))
             H5E_THROW(H5E_CANTGET, "unable to create extensible array debugging context")
-    } /* end if */
 
     /* Load the extensible array header */
-    if(NULL == (hdr = H5EA__hdr_protect(f, dxpl_id, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5EA__hdr_protect(f, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
 	H5E_THROW(H5E_CANTPROTECT, "unable to load extensible array header")
 
     /* Sanity check */
     HDassert(H5F_addr_eq(hdr->idx_blk_addr, addr));
 
     /* Protect index block */
-    if(NULL == (iblock = H5EA__iblock_protect(hdr, dxpl_id, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (iblock = H5EA__iblock_protect(hdr, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array index block, address = %llu", (unsigned long long)hdr->idx_blk_addr)
 
     /* Print opening message */
@@ -294,9 +290,9 @@ H5EA__iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *s
 CATCH
     if(dbg_ctx && cls->dst_dbg_ctx(dbg_ctx) < 0)
         H5E_THROW(H5E_CANTRELEASE, "unable to release extensible array debugging context")
-    if(iblock && H5EA__iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(iblock && H5EA__iblock_unprotect(iblock, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array index block")
-    if(hdr && H5EA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5EA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
 
 END_FUNC(PKG)   /* end H5EA__iblock_debug() */
@@ -317,7 +313,7 @@ END_FUNC(PKG)   /* end H5EA__iblock_debug() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__sblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+H5EA__sblock_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
     int fwidth, const H5EA_class_t *cls, haddr_t hdr_addr, unsigned sblk_idx, haddr_t obj_addr))
 
     /* Local variables */
@@ -336,19 +332,18 @@ H5EA__sblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
     HDassert(H5F_addr_defined(obj_addr));
 
     /* Check for debugging context callback available */
-    if(cls->crt_dbg_ctx) {
+    if(cls->crt_dbg_ctx)
         /* Create debugging context */
-        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, dxpl_id, obj_addr)))
+        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, obj_addr)))
             H5E_THROW(H5E_CANTGET, "unable to create extensible array debugging context")
-    } /* end if */
 
     /* Load the extensible array header */
-    if(NULL == (hdr = H5EA__hdr_protect(f, dxpl_id, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5EA__hdr_protect(f, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
 	H5E_THROW(H5E_CANTPROTECT, "unable to load extensible array header")
 
     /* Protect super block */
     /* (Note: setting parent of super block to 'hdr' for this operation should be OK -QAK) */
-    if(NULL == (sblock = H5EA__sblock_protect(hdr, dxpl_id, (H5EA_iblock_t *)hdr, addr, sblk_idx, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (sblock = H5EA__sblock_protect(hdr, (H5EA_iblock_t *)hdr, addr, sblk_idx, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array super block, address = %llu", (unsigned long long)addr)
 
     /* Print opening message */
@@ -386,9 +381,9 @@ H5EA__sblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
 CATCH
     if(dbg_ctx && cls->dst_dbg_ctx(dbg_ctx) < 0)
         H5E_THROW(H5E_CANTRELEASE, "unable to release extensible array debugging context")
-    if(sblock && H5EA__sblock_unprotect(sblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(sblock && H5EA__sblock_unprotect(sblock, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array super block")
-    if(hdr && H5EA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5EA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
 
 END_FUNC(PKG)   /* end H5EA__sblock_debug() */
@@ -409,7 +404,7 @@ END_FUNC(PKG)   /* end H5EA__sblock_debug() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+H5EA__dblock_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
     int fwidth, const H5EA_class_t *cls, haddr_t hdr_addr, size_t dblk_nelmts, haddr_t obj_addr))
 
     /* Local variables */
@@ -430,19 +425,18 @@ H5EA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
     HDassert(dblk_nelmts > 0);
 
     /* Check for debugging context callback available */
-    if(cls->crt_dbg_ctx) {
+    if(cls->crt_dbg_ctx)
         /* Create debugging context */
-        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, dxpl_id, obj_addr)))
+        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, obj_addr)))
             H5E_THROW(H5E_CANTGET, "unable to create extensible array debugging context")
-    } /* end if */
 
     /* Load the extensible array header */
-    if(NULL == (hdr = H5EA__hdr_protect(f, dxpl_id, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5EA__hdr_protect(f, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
 	H5E_THROW(H5E_CANTPROTECT, "unable to load extensible array header")
 
     /* Protect data block */
     /* (Note: setting parent of data block to 'hdr' for this operation should be OK -QAK) */
-    if(NULL == (dblock = H5EA__dblock_protect(hdr, dxpl_id, hdr, addr, dblk_nelmts, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (dblock = H5EA__dblock_protect(hdr, hdr, addr, dblk_nelmts, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array data block, address = %llu", (unsigned long long)addr)
 
     /* Print opening message */
@@ -469,9 +463,9 @@ H5EA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
 CATCH
     if(dbg_ctx && cls->dst_dbg_ctx(dbg_ctx) < 0)
         H5E_THROW(H5E_CANTRELEASE, "unable to release extensible array debugging context")
-    if(dblock && H5EA__dblock_unprotect(dblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(dblock && H5EA__dblock_unprotect(dblock, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array data block")
-    if(hdr && H5EA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5EA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
 
 END_FUNC(PKG)   /* end H5EA__dblock_debug() */
diff --git a/src/H5EAdblkpage.c b/src/H5EAdblkpage.c
index 927dcb6..6dd2e98 100644
--- a/src/H5EAdblkpage.c
+++ b/src/H5EAdblkpage.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -150,8 +148,7 @@ END_FUNC(PKG)   /* end H5EA__dblk_page_alloc() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__dblk_page_create(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_sblock_t *parent,
-    haddr_t addr))
+H5EA__dblk_page_create(H5EA_hdr_t *hdr, H5EA_sblock_t *parent, haddr_t addr))
 
     /* Local variables */
     H5EA_dblk_page_t *dblk_page = NULL; /* Extensible array data block page */
@@ -173,13 +170,13 @@ H5EA__dblk_page_create(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_sblock_t *parent,
         H5E_THROW(H5E_CANTSET, "can't set extensible array data block page elements to class's fill value")
 
     /* Cache the new extensible array data block page */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_EARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_EARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTINSERT, "can't add extensible array data block page to cache")
     inserted = TRUE;
 
     /* Add data block page as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblk_page) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblk_page) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         dblk_page->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -216,7 +213,7 @@ END_FUNC(PKG)   /* end H5EA__dblk_page_create() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5EA_dblk_page_t *, NULL, NULL,
-H5EA__dblk_page_protect(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_sblock_t *parent,
+H5EA__dblk_page_protect(H5EA_hdr_t *hdr, H5EA_sblock_t *parent,
     haddr_t dblk_page_addr, unsigned flags))
 
     /* Local variables */
@@ -236,13 +233,13 @@ H5EA__dblk_page_protect(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_sblock_t *parent,
     udata.dblk_page_addr = dblk_page_addr;
 
     /* Protect the data block page */
-    if(NULL == (dblk_page = (H5EA_dblk_page_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_EARRAY_DBLK_PAGE, dblk_page_addr, &udata, flags)))
+    if(NULL == (dblk_page = (H5EA_dblk_page_t *)H5AC_protect(hdr->f, H5AC_EARRAY_DBLK_PAGE, dblk_page_addr, &udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == dblk_page->top_proxy) {
         /* Add data block page as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblk_page) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblk_page) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         dblk_page->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -254,7 +251,7 @@ CATCH
     /* Clean up on error */
     if(!ret_value) {
         /* Release the data block page, if it was protected */
-        if(dblk_page && H5AC_unprotect(hdr->f, dxpl_id, H5AC_EARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
+        if(dblk_page && H5AC_unprotect(hdr->f, H5AC_EARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
             H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array data block page, address = %llu", (unsigned long long)dblk_page->addr)
     } /* end if */
 
@@ -277,8 +274,7 @@ END_FUNC(PKG)   /* end H5EA__dblk_page_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__dblk_page_unprotect(H5EA_dblk_page_t *dblk_page, hid_t dxpl_id,
-    unsigned cache_flags))
+H5EA__dblk_page_unprotect(H5EA_dblk_page_t *dblk_page, unsigned cache_flags))
 
     /* Local variables */
 
@@ -286,7 +282,7 @@ H5EA__dblk_page_unprotect(H5EA_dblk_page_t *dblk_page, hid_t dxpl_id,
     HDassert(dblk_page);
 
     /* Unprotect the data block page */
-    if(H5AC_unprotect(dblk_page->hdr->f, dxpl_id, H5AC_EARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, cache_flags) < 0)
+    if(H5AC_unprotect(dblk_page->hdr->f, H5AC_EARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array data block page, address = %llu", (unsigned long long)dblk_page->addr)
 
 CATCH
diff --git a/src/H5EAdblock.c b/src/H5EAdblock.c
index c288c69..d926fd5 100644
--- a/src/H5EAdblock.c
+++ b/src/H5EAdblock.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -162,8 +160,8 @@ END_FUNC(PKG)   /* end H5EA__dblock_alloc() */
  */
 BEGIN_FUNC(PKG, ERR,
 haddr_t, HADDR_UNDEF, HADDR_UNDEF,
-H5EA__dblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
-    hbool_t *stats_changed, hsize_t dblk_off, size_t nelmts))
+H5EA__dblock_create(H5EA_hdr_t *hdr, void *parent, hbool_t *stats_changed,
+    hsize_t dblk_off, size_t nelmts))
 
     /* Local variables */
     H5EA_dblock_t *dblock = NULL;       /* Extensible array data block */
@@ -186,7 +184,7 @@ H5EA__dblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
     dblock->block_off = dblk_off;
 
     /* Allocate space for the data block on disk */
-    if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_EARRAY_DBLOCK, dxpl_id, (hsize_t)dblock->size)))
+    if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_EARRAY_DBLOCK, (hsize_t)dblock->size)))
 	H5E_THROW(H5E_CANTALLOC, "file allocation failed for extensible array data block")
     dblock->addr = dblock_addr;
 
@@ -197,13 +195,13 @@ H5EA__dblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
             H5E_THROW(H5E_CANTSET, "can't set extensible array data block elements to class's fill value")
 
     /* Cache the new extensible array data block */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_EARRAY_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_EARRAY_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTINSERT, "can't add extensible array data block to cache")
     inserted = TRUE;
 
     /* Add data block as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         dblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -230,7 +228,7 @@ CATCH
                     H5E_THROW(H5E_CANTREMOVE, "unable to remove extensible array data block from cache")
 
             /* Release data block's disk space */
-            if(H5F_addr_defined(dblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_EARRAY_DBLOCK, dxpl_id, dblock->addr, (hsize_t)dblock->size) < 0)
+            if(H5F_addr_defined(dblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_EARRAY_DBLOCK, dblock->addr, (hsize_t)dblock->size) < 0)
                 H5E_THROW(H5E_CANTFREE, "unable to release extensible array data block")
 
             /* Destroy data block */
@@ -294,8 +292,8 @@ END_FUNC(PKG)   /* end H5EA__dblock_sblk_idx() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5EA_dblock_t *, NULL, NULL,
-H5EA__dblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
-    haddr_t dblk_addr, size_t dblk_nelmts, unsigned flags))
+H5EA__dblock_protect(H5EA_hdr_t *hdr, void *parent, haddr_t dblk_addr,
+    size_t dblk_nelmts, unsigned flags))
 
     /* Local variables */
     H5EA_dblock_t *dblock;              /* Extensible array data block */
@@ -316,13 +314,13 @@ H5EA__dblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
     udata.dblk_addr = dblk_addr;
 
     /* Protect the data block */
-    if(NULL == (dblock = (H5EA_dblock_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_EARRAY_DBLOCK, dblk_addr, &udata, flags)))
+    if(NULL == (dblock = (H5EA_dblock_t *)H5AC_protect(hdr->f, H5AC_EARRAY_DBLOCK, dblk_addr, &udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array data block, address = %llu", (unsigned long long)dblk_addr)
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == dblock->top_proxy) {
         /* Add data block as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         dblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -335,7 +333,7 @@ CATCH
     /* Clean up on error */
     if(!ret_value) {
         /* Release the data block, if it was protected */
-        if(dblock && H5AC_unprotect(hdr->f, dxpl_id, H5AC_EARRAY_DBLOCK, dblock->addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+        if(dblock && H5AC_unprotect(hdr->f, H5AC_EARRAY_DBLOCK, dblock->addr, dblock, H5AC__NO_FLAGS_SET) < 0)
             H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array data block, address = %llu", (unsigned long long)dblock->addr)
     } /* end if */
 
@@ -357,7 +355,7 @@ END_FUNC(PKG)   /* end H5EA__dblock_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__dblock_unprotect(H5EA_dblock_t *dblock, hid_t dxpl_id, unsigned cache_flags))
+H5EA__dblock_unprotect(H5EA_dblock_t *dblock, unsigned cache_flags))
 
     /* Local variables */
 
@@ -365,7 +363,7 @@ H5EA__dblock_unprotect(H5EA_dblock_t *dblock, hid_t dxpl_id, unsigned cache_flag
     HDassert(dblock);
 
     /* Unprotect the data block */
-    if(H5AC_unprotect(dblock->hdr->f, dxpl_id, H5AC_EARRAY_DBLOCK, dblock->addr, dblock, cache_flags) < 0)
+    if(H5AC_unprotect(dblock->hdr->f, H5AC_EARRAY_DBLOCK, dblock->addr, dblock, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array data block, address = %llu", (unsigned long long)dblock->addr)
 
 CATCH
@@ -388,8 +386,8 @@ END_FUNC(PKG)   /* end H5EA__dblock_unprotect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__dblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
-    haddr_t dblk_addr, size_t dblk_nelmts))
+H5EA__dblock_delete(H5EA_hdr_t *hdr, void *parent, haddr_t dblk_addr,
+    size_t dblk_nelmts))
 
     /* Local variables */
     H5EA_dblock_t *dblock = NULL;       /* Pointer to data block */
@@ -401,7 +399,7 @@ H5EA__dblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
     HDassert(dblk_nelmts > 0);
 
     /* Protect data block */
-    if(NULL == (dblock = H5EA__dblock_protect(hdr, dxpl_id, parent, dblk_addr, dblk_nelmts, H5AC__NO_FLAGS_SET)))
+    if(NULL == (dblock = H5EA__dblock_protect(hdr, parent, dblk_addr, dblk_nelmts, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array data block, address = %llu", (unsigned long long)dblk_addr)
 
     /* Check if this is a paged data block */
@@ -420,7 +418,7 @@ H5EA__dblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
         for(u = 0; u < npages; u++) {
             /* Evict the data block page from the metadata cache */
             /* (OK to call if it doesn't exist in the cache) */
-            if(H5AC_expunge_entry(hdr->f, dxpl_id, H5AC_EARRAY_DBLK_PAGE, dblk_page_addr, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_expunge_entry(hdr->f, H5AC_EARRAY_DBLK_PAGE, dblk_page_addr, H5AC__NO_FLAGS_SET) < 0)
                 H5E_THROW(H5E_CANTEXPUNGE, "unable to remove array data block page from metadata cache")
 
             /* Advance to next page address */
@@ -430,7 +428,7 @@ H5EA__dblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
 
 CATCH
     /* Finished deleting data block in metadata cache */
-    if(dblock && H5EA__dblock_unprotect(dblock, dxpl_id, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+    if(dblock && H5EA__dblock_unprotect(dblock, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array data block")
 
 END_FUNC(PKG)   /* end H5EA__dblock_delete() */
diff --git a/src/H5EAhdr.c b/src/H5EAhdr.c
index 76d8733..62a23b8 100644
--- a/src/H5EAhdr.c
+++ b/src/H5EAhdr.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -357,8 +355,7 @@ END_FUNC(PKG)   /* end H5EA__hdr_free_elmts() */
  */
 BEGIN_FUNC(PKG, ERR,
 haddr_t, HADDR_UNDEF, HADDR_UNDEF,
-H5EA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam,
-    void *ctx_udata))
+H5EA__hdr_create(H5F_t *f, const H5EA_create_t *cparam, void *ctx_udata))
 
     /* Local variables */
     H5EA_hdr_t *hdr = NULL;     /* Extensible array header */
@@ -417,7 +414,7 @@ H5EA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam,
         H5E_THROW(H5E_CANTINIT, "initialization failed for extensible array header")
 
     /* Allocate space for the header on disk */
-    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_EARRAY_HDR, dxpl_id, (hsize_t)hdr->size)))
+    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_EARRAY_HDR, (hsize_t)hdr->size)))
         H5E_THROW(H5E_CANTALLOC, "file allocation failed for extensible array header")
 
     /* Create 'top' proxy for extensible array entries */
@@ -426,13 +423,13 @@ H5EA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam,
             H5E_THROW(H5E_CANTCREATE, "can't create extensible array entry proxy")
 
     /* Cache the new extensible array header */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_EARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_EARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTINSERT, "can't add extensible array header to cache")
     inserted = TRUE;
 
     /* Add header as child of 'top' proxy */
     if(hdr->top_proxy)
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, dxpl_id, hdr) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, hdr) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
 
     /* Set address of array header to return */
@@ -447,7 +444,7 @@ CATCH
                     H5E_THROW(H5E_CANTREMOVE, "unable to remove extensible array header from cache")
 
             /* Release header's disk space */
-            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_EARRAY_HDR, dxpl_id, hdr->addr, (hsize_t)hdr->size) < 0)
+            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_EARRAY_HDR, hdr->addr, (hsize_t)hdr->size) < 0)
                 H5E_THROW(H5E_CANTFREE, "unable to free extensible array header")
 
             /* Destroy header */
@@ -628,7 +625,7 @@ END_FUNC(PKG)   /* end H5EA__hdr_modified() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5EA_hdr_t *, NULL, NULL,
-H5EA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata,
+H5EA__hdr_protect(H5F_t *f, haddr_t ea_addr, void *ctx_udata,
     unsigned flags))
 
     /* Local variables */
@@ -648,7 +645,7 @@ H5EA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata,
     udata.ctx_udata = ctx_udata;
 
     /* Protect the header */
-    if(NULL == (hdr = (H5EA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_EARRAY_HDR, ea_addr, &udata, flags)))
+    if(NULL == (hdr = (H5EA_hdr_t *)H5AC_protect(f, H5AC_EARRAY_HDR, ea_addr, &udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array header, address = %llu", (unsigned long long)ea_addr)
     hdr->f = f;   /* (Must be set again here, in case the header was already in the cache -QAK) */
 
@@ -659,7 +656,7 @@ H5EA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata,
             H5E_THROW(H5E_CANTCREATE, "can't create extensible array entry proxy")
 
         /* Add header as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, dxpl_id, hdr) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, hdr) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
     } /* end if */
 
@@ -686,7 +683,7 @@ END_FUNC(PKG)   /* end H5EA__hdr_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__hdr_unprotect(H5EA_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags))
+H5EA__hdr_unprotect(H5EA_hdr_t *hdr, unsigned cache_flags))
 
     /* Local variables */
 
@@ -694,7 +691,7 @@ H5EA__hdr_unprotect(H5EA_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags))
     HDassert(hdr);
 
     /* Unprotect the header */
-    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_EARRAY_HDR, hdr->addr, hdr, cache_flags) < 0)
+    if(H5AC_unprotect(hdr->f, H5AC_EARRAY_HDR, hdr->addr, hdr, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array hdr, address = %llu", (unsigned long long)hdr->addr)
 
 CATCH
@@ -717,7 +714,7 @@ END_FUNC(PKG)   /* end H5EA__hdr_unprotect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__hdr_delete(H5EA_hdr_t *hdr, hid_t dxpl_id))
+H5EA__hdr_delete(H5EA_hdr_t *hdr))
 
     /* Local variables */
     unsigned cache_flags = H5AC__NO_FLAGS_SET;  /* Flags for unprotecting header */
@@ -743,7 +740,7 @@ H5EA__hdr_delete(H5EA_hdr_t *hdr, hid_t dxpl_id))
     /* Check for index block */
     if(H5F_addr_defined(hdr->idx_blk_addr)) {
         /* Delete index block */
-        if(H5EA__iblock_delete(hdr, dxpl_id) < 0)
+        if(H5EA__iblock_delete(hdr) < 0)
             H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array index block")
     } /* end if */
 
@@ -753,7 +750,7 @@ H5EA__hdr_delete(H5EA_hdr_t *hdr, hid_t dxpl_id))
 CATCH
 
     /* Unprotect the header, deleting it if an error hasn't occurred */
-    if(H5EA__hdr_unprotect(hdr, dxpl_id, cache_flags) < 0)
+    if(H5EA__hdr_unprotect(hdr, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array header")
 
 END_FUNC(PKG)   /* end H5EA__hdr_delete() */
diff --git a/src/H5EAiblock.c b/src/H5EAiblock.c
index a3723c5..1b5957a 100644
--- a/src/H5EAiblock.c
+++ b/src/H5EAiblock.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -178,7 +176,7 @@ END_FUNC(PKG)   /* end H5EA__iblock_alloc() */
  */
 BEGIN_FUNC(PKG, ERR,
 haddr_t, HADDR_UNDEF, HADDR_UNDEF,
-H5EA__iblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, hbool_t *stats_changed))
+H5EA__iblock_create(H5EA_hdr_t *hdr, hbool_t *stats_changed))
 
     /* Local variables */
     H5EA_iblock_t *iblock = NULL;       /* Extensible array index block */
@@ -204,7 +202,7 @@ HDfprintf(stderr, "%s: iblock->size = %Zu\n", FUNC, iblock->size);
 #endif /* QAK */
 
     /* Allocate space for the index block on disk */
-    if(HADDR_UNDEF == (iblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_EARRAY_IBLOCK, dxpl_id, (hsize_t)iblock->size)))
+    if(HADDR_UNDEF == (iblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_EARRAY_IBLOCK, (hsize_t)iblock->size)))
 	H5E_THROW(H5E_CANTALLOC, "file allocation failed for extensible array index block")
     iblock->addr = iblock_addr;
 
@@ -232,13 +230,13 @@ HDfprintf(stderr, "%s: iblock->size = %Zu\n", FUNC, iblock->size);
     } /* end if */
 
     /* Cache the new extensible array index block */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_EARRAY_IBLOCK, iblock_addr, iblock, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_EARRAY_IBLOCK, iblock_addr, iblock, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTINSERT, "can't add extensible array index block to cache")
     inserted = TRUE;
 
     /* Add index block as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, iblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, iblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         iblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -267,7 +265,7 @@ CATCH
                     H5E_THROW(H5E_CANTREMOVE, "unable to remove extensible array index block from cache")
 
             /* Release index block's disk space */
-            if(H5F_addr_defined(iblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_EARRAY_IBLOCK, dxpl_id, iblock->addr, (hsize_t)iblock->size) < 0)
+            if(H5F_addr_defined(iblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_EARRAY_IBLOCK, iblock->addr, (hsize_t)iblock->size) < 0)
                 H5E_THROW(H5E_CANTFREE, "unable to release file space for extensible array index block")
 
             /* Destroy index block */
@@ -293,7 +291,7 @@ END_FUNC(PKG)   /* end H5EA__iblock_create() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5EA_iblock_t *, NULL, NULL,
-H5EA__iblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id, unsigned flags))
+H5EA__iblock_protect(H5EA_hdr_t *hdr, unsigned flags))
 
     /* Local variables */
     H5EA_iblock_t *iblock = NULL;       /* Pointer to index block */
@@ -309,13 +307,13 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     HDassert((flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
 
     /* Protect the index block */
-    if(NULL == (iblock = (H5EA_iblock_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_EARRAY_IBLOCK, hdr->idx_blk_addr, hdr, flags)))
+    if(NULL == (iblock = (H5EA_iblock_t *)H5AC_protect(hdr->f, H5AC_EARRAY_IBLOCK, hdr->idx_blk_addr, hdr, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array index block, address = %llu", (unsigned long long)hdr->idx_blk_addr)
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == iblock->top_proxy) {
         /* Add index block as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, iblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, iblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         iblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -327,7 +325,7 @@ CATCH
     /* Clean up on error */
     if(!ret_value) {
         /* Release the index block, if it was protected */
-        if(iblock && H5AC_unprotect(hdr->f, dxpl_id, H5AC_EARRAY_IBLOCK, iblock->addr, iblock, H5AC__NO_FLAGS_SET) < 0)
+        if(iblock && H5AC_unprotect(hdr->f, H5AC_EARRAY_IBLOCK, iblock->addr, iblock, H5AC__NO_FLAGS_SET) < 0)
             H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array index block, address = %llu", (unsigned long long)iblock->addr)
     } /* end if */
 
@@ -349,7 +347,7 @@ END_FUNC(PKG)   /* end H5EA__iblock_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__iblock_unprotect(H5EA_iblock_t *iblock, hid_t dxpl_id, unsigned cache_flags))
+H5EA__iblock_unprotect(H5EA_iblock_t *iblock, unsigned cache_flags))
 
     /* Local variables */
 
@@ -361,7 +359,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     HDassert(iblock);
 
     /* Unprotect the index block */
-    if(H5AC_unprotect(iblock->hdr->f, dxpl_id, H5AC_EARRAY_IBLOCK, iblock->addr, iblock, cache_flags) < 0)
+    if(H5AC_unprotect(iblock->hdr->f, H5AC_EARRAY_IBLOCK, iblock->addr, iblock, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array index block, address = %llu", (unsigned long long)iblock->addr)
 
 CATCH
@@ -384,7 +382,7 @@ END_FUNC(PKG)   /* end H5EA__iblock_unprotect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__iblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id))
+H5EA__iblock_delete(H5EA_hdr_t *hdr))
 
     /* Local variables */
     H5EA_iblock_t *iblock = NULL;       /* Pointer to index block */
@@ -398,7 +396,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     HDassert(H5F_addr_defined(hdr->idx_blk_addr));
 
     /* Protect index block */
-    if(NULL == (iblock = H5EA__iblock_protect(hdr, dxpl_id, H5AC__NO_FLAGS_SET)))
+    if(NULL == (iblock = H5EA__iblock_protect(hdr, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array index block, address = %llu", (unsigned long long)hdr->idx_blk_addr)
 
     /* Check for index block having data block pointers */
@@ -413,7 +411,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
             /* Check for data block existing */
             if(H5F_addr_defined(iblock->dblk_addrs[u])) {
                 /* Delete data block */
-                if(H5EA__dblock_delete(hdr, dxpl_id, iblock, iblock->dblk_addrs[u], hdr->sblk_info[sblk_idx].dblk_nelmts) < 0)
+                if(H5EA__dblock_delete(hdr, iblock, iblock->dblk_addrs[u], hdr->sblk_info[sblk_idx].dblk_nelmts) < 0)
                     H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array data block")
                 iblock->dblk_addrs[u] = HADDR_UNDEF;
             } /* end if */
@@ -438,7 +436,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
             /* Check for data block existing */
             if(H5F_addr_defined(iblock->sblk_addrs[u])) {
                 /* Delete super block */
-                if(H5EA__sblock_delete(hdr, dxpl_id, iblock, iblock->sblk_addrs[u], (unsigned)(u + iblock->nsblks)) < 0)
+                if(H5EA__sblock_delete(hdr, iblock, iblock->sblk_addrs[u], (unsigned)(u + iblock->nsblks)) < 0)
                     H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array super block")
                 iblock->sblk_addrs[u] = HADDR_UNDEF;
             } /* end if */
@@ -447,7 +445,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
 
 CATCH
     /* Finished deleting index block in metadata cache */
-    if(iblock && H5EA__iblock_unprotect(iblock, dxpl_id, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+    if(iblock && H5EA__iblock_unprotect(iblock, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array index block")
 
 END_FUNC(PKG)   /* end H5EA__iblock_delete() */
diff --git a/src/H5EAint.c b/src/H5EAint.c
index 9f910d0..2baf1f4 100644
--- a/src/H5EAint.c
+++ b/src/H5EAint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5EAmodule.h b/src/H5EAmodule.h
index 405b232..d3e06b7 100644
--- a/src/H5EAmodule.h
+++ b/src/H5EAmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5EApkg.h b/src/H5EApkg.h
index 7540ff2..fb9afc0 100644
--- a/src/H5EApkg.h
+++ b/src/H5EApkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -398,7 +396,7 @@ H5_DLL herr_t H5EA__destroy_flush_depend(H5AC_info_t *parent_entry,
 /* Header routines */
 H5_DLL H5EA_hdr_t *H5EA__hdr_alloc(H5F_t *f);
 H5_DLL herr_t H5EA__hdr_init(H5EA_hdr_t *hdr, void *ctx_udata);
-H5_DLL haddr_t H5EA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam,
+H5_DLL haddr_t H5EA__hdr_create(H5F_t *f, const H5EA_create_t *cparam,
     void *ctx_udata);
 H5_DLL void *H5EA__hdr_alloc_elmts(H5EA_hdr_t *hdr, size_t nelmts);
 H5_DLL herr_t H5EA__hdr_free_elmts(H5EA_hdr_t *hdr, size_t nelmts, void *elmts);
@@ -407,71 +405,65 @@ H5_DLL herr_t H5EA__hdr_decr(H5EA_hdr_t *hdr);
 H5_DLL herr_t H5EA__hdr_fuse_incr(H5EA_hdr_t *hdr);
 H5_DLL size_t H5EA__hdr_fuse_decr(H5EA_hdr_t *hdr);
 H5_DLL herr_t H5EA__hdr_modified(H5EA_hdr_t *hdr);
-H5_DLL H5EA_hdr_t *H5EA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr,
+H5_DLL H5EA_hdr_t *H5EA__hdr_protect(H5F_t *f, haddr_t ea_addr,
     void *ctx_udata, unsigned flags);
-H5_DLL herr_t H5EA__hdr_unprotect(H5EA_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags);
-H5_DLL herr_t H5EA__hdr_delete(H5EA_hdr_t *hdr, hid_t dxpl_id);
+H5_DLL herr_t H5EA__hdr_unprotect(H5EA_hdr_t *hdr, unsigned cache_flags);
+H5_DLL herr_t H5EA__hdr_delete(H5EA_hdr_t *hdr);
 H5_DLL herr_t H5EA__hdr_dest(H5EA_hdr_t *hdr);
 
 /* Index block routines */
 H5_DLL H5EA_iblock_t *H5EA__iblock_alloc(H5EA_hdr_t *hdr);
-H5_DLL haddr_t H5EA__iblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id,
-    hbool_t *stats_changed);
-H5_DLL H5EA_iblock_t *H5EA__iblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id,
-    unsigned flags);
-H5_DLL herr_t H5EA__iblock_unprotect(H5EA_iblock_t *iblock, hid_t dxpl_id,
-    unsigned cache_flags);
-H5_DLL herr_t H5EA__iblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id);
+H5_DLL haddr_t H5EA__iblock_create(H5EA_hdr_t *hdr, hbool_t *stats_changed);
+H5_DLL H5EA_iblock_t *H5EA__iblock_protect(H5EA_hdr_t *hdr, unsigned flags);
+H5_DLL herr_t H5EA__iblock_unprotect(H5EA_iblock_t *iblock, unsigned cache_flags);
+H5_DLL herr_t H5EA__iblock_delete(H5EA_hdr_t *hdr);
 H5_DLL herr_t H5EA__iblock_dest(H5EA_iblock_t *iblock);
 
 /* Super block routines */
 H5_DLL H5EA_sblock_t *H5EA__sblock_alloc(H5EA_hdr_t *hdr, H5EA_iblock_t *parent,
     unsigned sblk_idx);
-H5_DLL haddr_t H5EA__sblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id,
-    H5EA_iblock_t *parent, hbool_t *stats_changed, unsigned sblk_idx);
-H5_DLL H5EA_sblock_t *H5EA__sblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id,
-    H5EA_iblock_t *parent, haddr_t sblk_addr, unsigned sblk_idx, 
-    unsigned flags);
-H5_DLL herr_t H5EA__sblock_unprotect(H5EA_sblock_t *sblock, hid_t dxpl_id,
-    unsigned cache_flags);
-H5_DLL herr_t H5EA__sblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id,
-    H5EA_iblock_t *parent, haddr_t sblk_addr, unsigned sblk_idx);
+H5_DLL haddr_t H5EA__sblock_create(H5EA_hdr_t *hdr, H5EA_iblock_t *parent,
+    hbool_t *stats_changed, unsigned sblk_idx);
+H5_DLL H5EA_sblock_t *H5EA__sblock_protect(H5EA_hdr_t *hdr, H5EA_iblock_t *parent,
+    haddr_t sblk_addr, unsigned sblk_idx, unsigned flags);
+H5_DLL herr_t H5EA__sblock_unprotect(H5EA_sblock_t *sblock, unsigned cache_flags);
+H5_DLL herr_t H5EA__sblock_delete(H5EA_hdr_t *hdr, H5EA_iblock_t *parent,
+    haddr_t sblk_addr, unsigned sblk_idx);
 H5_DLL herr_t H5EA__sblock_dest(H5EA_sblock_t *sblock);
 
 /* Data block routines */
 H5_DLL H5EA_dblock_t *H5EA__dblock_alloc(H5EA_hdr_t *hdr, void *parent,
     size_t nelmts);
-H5_DLL haddr_t H5EA__dblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
+H5_DLL haddr_t H5EA__dblock_create(H5EA_hdr_t *hdr, void *parent,
     hbool_t *stats_changed, hsize_t dblk_off, size_t nelmts);
 H5_DLL unsigned H5EA__dblock_sblk_idx(const H5EA_hdr_t *hdr, hsize_t idx);
-H5_DLL H5EA_dblock_t *H5EA__dblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id,
-    void *parent, haddr_t dblk_addr, size_t dblk_nelmts, unsigned flags);
-H5_DLL herr_t H5EA__dblock_unprotect(H5EA_dblock_t *dblock, hid_t dxpl_id,
-    unsigned cache_flags);
-H5_DLL herr_t H5EA__dblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, void *parent,
+H5_DLL H5EA_dblock_t *H5EA__dblock_protect(H5EA_hdr_t *hdr, void *parent,
+    haddr_t dblk_addr, size_t dblk_nelmts, unsigned flags);
+H5_DLL herr_t H5EA__dblock_unprotect(H5EA_dblock_t *dblock, unsigned cache_flags);
+H5_DLL herr_t H5EA__dblock_delete(H5EA_hdr_t *hdr, void *parent,
     haddr_t dblk_addr, size_t dblk_nelmts);
 H5_DLL herr_t H5EA__dblock_dest(H5EA_dblock_t *dblock);
 
 /* Data block page routines */
 H5_DLL H5EA_dblk_page_t *H5EA__dblk_page_alloc(H5EA_hdr_t *hdr, H5EA_sblock_t *parent);
-H5_DLL herr_t H5EA__dblk_page_create(H5EA_hdr_t *hdr, hid_t dxpl_id,
-    H5EA_sblock_t *parent, haddr_t addr);
-H5_DLL H5EA_dblk_page_t *H5EA__dblk_page_protect(H5EA_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5EA__dblk_page_create(H5EA_hdr_t *hdr, H5EA_sblock_t *parent,
+    haddr_t addr);
+H5_DLL H5EA_dblk_page_t *H5EA__dblk_page_protect(H5EA_hdr_t *hdr, 
     H5EA_sblock_t *parent, haddr_t dblk_page_addr, unsigned flags);
 H5_DLL herr_t H5EA__dblk_page_unprotect(H5EA_dblk_page_t *dblk_page,
-    hid_t dxpl_id, unsigned cache_flags);
+    unsigned cache_flags);
 H5_DLL herr_t H5EA__dblk_page_dest(H5EA_dblk_page_t *dblk_page);
 
 /* Debugging routines for dumping file structures */
-H5_DLL herr_t H5EA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+H5_DLL herr_t H5EA__hdr_debug(H5F_t *f, haddr_t addr,
     FILE *stream, int indent, int fwidth, const H5EA_class_t *cls, haddr_t obj_addr);
-H5_DLL herr_t H5EA__iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+H5_DLL herr_t H5EA__iblock_debug(H5F_t *f, haddr_t addr,
     FILE *stream, int indent, int fwidth, const H5EA_class_t *cls,
     haddr_t hdr_addr, haddr_t obj_addr);
-H5_DLL herr_t H5EA__sblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+H5_DLL herr_t H5EA__sblock_debug(H5F_t *f, haddr_t addr,
     FILE *stream, int indent, int fwidth, const H5EA_class_t *cls,
     haddr_t hdr_addr, unsigned sblk_idx, haddr_t obj_addr);
-H5_DLL herr_t H5EA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+H5_DLL herr_t H5EA__dblock_debug(H5F_t *f, haddr_t addr,
     FILE *stream, int indent, int fwidth, const H5EA_class_t *cls,
     haddr_t hdr_addr, size_t dblk_nelmts, haddr_t obj_addr);
 
diff --git a/src/H5EAprivate.h b/src/H5EAprivate.h
index 66d88e0..1195256 100644
--- a/src/H5EAprivate.h
+++ b/src/H5EAprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -74,7 +72,7 @@ typedef struct H5EA_class_t {
     herr_t (*encode)(void *raw, const void *elmt, size_t nelmts, void *ctx);   /* Encode elements from native form to disk storage form */
     herr_t (*decode)(const void *raw, void *elmt, size_t nelmts, void *ctx);   /* Decode elements from disk storage form to native form */
     herr_t (*debug)(FILE *stream, int indent, int fwidth, hsize_t idx, const void *elmt); /* Print an element for debugging */
-    void *(*crt_dbg_ctx)(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr); /* Create debugging context */
+    void *(*crt_dbg_ctx)(H5F_t *f, haddr_t obj_addr); /* Create debugging context */
     herr_t (*dst_dbg_ctx)(void *dbg_ctx);       /* Destroy debugging context */
 } H5EA_class_t;
 
@@ -135,17 +133,17 @@ H5_DLLVAR const H5EA_class_t H5EA_CLS_FILT_CHUNK[1];
 /***************************************/
 
 /* General routines */
-H5_DLL H5EA_t *H5EA_create(H5F_t *f, hid_t dxpl_id, const H5EA_create_t *cparam,
+H5_DLL H5EA_t *H5EA_create(H5F_t *f, const H5EA_create_t *cparam,
     void *ctx_udata);
-H5_DLL H5EA_t *H5EA_open(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata);
+H5_DLL H5EA_t *H5EA_open(H5F_t *f, haddr_t ea_addr, void *ctx_udata);
 H5_DLL herr_t H5EA_get_nelmts(const H5EA_t *ea, hsize_t *nelmts);
 H5_DLL herr_t H5EA_get_addr(const H5EA_t *ea, haddr_t *addr);
-H5_DLL herr_t H5EA_set(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, const void *elmt);
-H5_DLL herr_t H5EA_get(const H5EA_t *ea, hid_t dxpl_id, hsize_t idx, void *elmt);
-H5_DLL herr_t H5EA_depend(H5EA_t *ea, hid_t dxpl_id, H5AC_proxy_entry_t *parent);
-H5_DLL herr_t H5EA_iterate(H5EA_t *fa, hid_t dxpl_id, H5EA_operator_t op, void *udata);
-H5_DLL herr_t H5EA_close(H5EA_t *ea, hid_t dxpl_id);
-H5_DLL herr_t H5EA_delete(H5F_t *f, hid_t dxpl_id, haddr_t ea_addr, void *ctx_udata);
+H5_DLL herr_t H5EA_set(const H5EA_t *ea, hsize_t idx, const void *elmt);
+H5_DLL herr_t H5EA_get(const H5EA_t *ea, hsize_t idx, void *elmt);
+H5_DLL herr_t H5EA_depend(H5EA_t *ea, H5AC_proxy_entry_t *parent);
+H5_DLL herr_t H5EA_iterate(H5EA_t *fa, H5EA_operator_t op, void *udata);
+H5_DLL herr_t H5EA_close(H5EA_t *ea);
+H5_DLL herr_t H5EA_delete(H5F_t *f, haddr_t ea_addr, void *ctx_udata);
 H5_DLL herr_t H5EA_patch_file(H5EA_t *fa, H5F_t *f);
 
 /* Statistics routines */
diff --git a/src/H5EAsblock.c b/src/H5EAsblock.c
index 2fa87e0..b4671f8 100644
--- a/src/H5EAsblock.c
+++ b/src/H5EAsblock.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -188,8 +186,8 @@ END_FUNC(PKG)   /* end H5EA__sblock_alloc() */
  */
 BEGIN_FUNC(PKG, ERR,
 haddr_t, HADDR_UNDEF, HADDR_UNDEF,
-H5EA__sblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
-    hbool_t *stats_changed, unsigned sblk_idx))
+H5EA__sblock_create(H5EA_hdr_t *hdr, H5EA_iblock_t *parent, hbool_t *stats_changed,
+    unsigned sblk_idx))
 
     /* Local variables */
     H5EA_sblock_t *sblock = NULL;       /* Extensible array super block */
@@ -212,7 +210,7 @@ H5EA__sblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
     sblock->block_off = hdr->sblk_info[sblk_idx].start_idx;
 
     /* Allocate space for the super block on disk */
-    if(HADDR_UNDEF == (sblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_EARRAY_SBLOCK, dxpl_id, (hsize_t)sblock->size)))
+    if(HADDR_UNDEF == (sblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_EARRAY_SBLOCK, (hsize_t)sblock->size)))
 	H5E_THROW(H5E_CANTALLOC, "file allocation failed for extensible array super block")
     sblock->addr = sblock_addr;
 
@@ -220,13 +218,13 @@ H5EA__sblock_create(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
     H5VM_array_fill(sblock->dblk_addrs, &tmp_addr, sizeof(haddr_t), sblock->ndblks);
 
     /* Cache the new extensible array super block */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_EARRAY_SBLOCK, sblock_addr, sblock, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_EARRAY_SBLOCK, sblock_addr, sblock, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTINSERT, "can't add extensible array super block to cache")
     inserted = TRUE;
 
     /* Add super block as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, sblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, sblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         sblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -250,7 +248,7 @@ CATCH
                     H5E_THROW(H5E_CANTREMOVE, "unable to remove extensible array super block from cache")
 
             /* Release super block's disk space */
-            if(H5F_addr_defined(sblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_EARRAY_SBLOCK, dxpl_id, sblock->addr, (hsize_t)sblock->size) < 0)
+            if(H5F_addr_defined(sblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_EARRAY_SBLOCK, sblock->addr, (hsize_t)sblock->size) < 0)
                 H5E_THROW(H5E_CANTFREE, "unable to release extensible array super block")
 
             /* Destroy super block */
@@ -276,7 +274,7 @@ END_FUNC(PKG)   /* end H5EA__sblock_create() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5EA_sblock_t *, NULL, NULL,
-H5EA__sblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
+H5EA__sblock_protect(H5EA_hdr_t *hdr, H5EA_iblock_t *parent,
     haddr_t sblk_addr, unsigned sblk_idx, unsigned flags))
 
     /* Local variables */
@@ -297,13 +295,13 @@ H5EA__sblock_protect(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
     udata.sblk_addr = sblk_addr;
 
     /* Protect the super block */
-    if(NULL == (sblock = (H5EA_sblock_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_EARRAY_SBLOCK, sblk_addr, &udata, flags)))
+    if(NULL == (sblock = (H5EA_sblock_t *)H5AC_protect(hdr->f, H5AC_EARRAY_SBLOCK, sblk_addr, &udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array super block, address = %llu", (unsigned long long)sblk_addr)
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == sblock->top_proxy) {
         /* Add super block as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, sblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, sblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add extensible array entry as child of array proxy")
         sblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -315,7 +313,7 @@ CATCH
     /* Clean up on error */
     if(!ret_value) {
         /* Release the super block, if it was protected */
-        if(sblock && H5AC_unprotect(hdr->f, dxpl_id, H5AC_EARRAY_SBLOCK, sblock->addr, sblock, H5AC__NO_FLAGS_SET) < 0)
+        if(sblock && H5AC_unprotect(hdr->f, H5AC_EARRAY_SBLOCK, sblock->addr, sblock, H5AC__NO_FLAGS_SET) < 0)
             H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array super block, address = %llu", (unsigned long long)sblock->addr)
     } /* end if */
 
@@ -337,7 +335,7 @@ END_FUNC(PKG)   /* end H5EA__sblock_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__sblock_unprotect(H5EA_sblock_t *sblock, hid_t dxpl_id, unsigned cache_flags))
+H5EA__sblock_unprotect(H5EA_sblock_t *sblock, unsigned cache_flags))
 
     /* Local variables */
 
@@ -345,7 +343,7 @@ H5EA__sblock_unprotect(H5EA_sblock_t *sblock, hid_t dxpl_id, unsigned cache_flag
     HDassert(sblock);
 
     /* Unprotect the super block */
-    if(H5AC_unprotect(sblock->hdr->f, dxpl_id, H5AC_EARRAY_SBLOCK, sblock->addr, sblock, cache_flags) < 0)
+    if(H5AC_unprotect(sblock->hdr->f, H5AC_EARRAY_SBLOCK, sblock->addr, sblock, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect extensible array super block, address = %llu", (unsigned long long)sblock->addr)
 
 CATCH
@@ -368,7 +366,7 @@ END_FUNC(PKG)   /* end H5EA__sblock_unprotect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5EA__sblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
+H5EA__sblock_delete(H5EA_hdr_t *hdr, H5EA_iblock_t *parent,
     haddr_t sblk_addr, unsigned sblk_idx))
 
     /* Local variables */
@@ -380,7 +378,7 @@ H5EA__sblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
     HDassert(H5F_addr_defined(sblk_addr));
 
     /* Protect super block */
-    if(NULL == (sblock = H5EA__sblock_protect(hdr, dxpl_id, parent, sblk_addr, sblk_idx, H5AC__NO_FLAGS_SET)))
+    if(NULL == (sblock = H5EA__sblock_protect(hdr, parent, sblk_addr, sblk_idx, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect extensible array super block, address = %llu", (unsigned long long)sblk_addr)
 
     /* Iterate over data blocks */
@@ -388,7 +386,7 @@ H5EA__sblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
         /* Check for data block existing */
         if(H5F_addr_defined(sblock->dblk_addrs[u])) {
             /* Delete data block */
-            if(H5EA__dblock_delete(hdr, dxpl_id, sblock, sblock->dblk_addrs[u], sblock->dblk_nelmts) < 0)
+            if(H5EA__dblock_delete(hdr, sblock, sblock->dblk_addrs[u], sblock->dblk_nelmts) < 0)
                 H5E_THROW(H5E_CANTDELETE, "unable to delete extensible array data block")
             sblock->dblk_addrs[u] = HADDR_UNDEF;
         } /* end if */
@@ -396,7 +394,7 @@ H5EA__sblock_delete(H5EA_hdr_t *hdr, hid_t dxpl_id, H5EA_iblock_t *parent,
 
 CATCH
     /* Finished deleting super block in metadata cache */
-    if(sblock && H5EA__sblock_unprotect(sblock, dxpl_id, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+    if(sblock && H5EA__sblock_unprotect(sblock, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release extensible array super block")
 
 END_FUNC(PKG)   /* end H5EA__sblock_delete() */
diff --git a/src/H5EAstat.c b/src/H5EAstat.c
index 0c27681..72c4d14 100644
--- a/src/H5EAstat.c
+++ b/src/H5EAstat.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5EAtest.c b/src/H5EAtest.c
index 905aa7f..3da7996 100644
--- a/src/H5EAtest.c
+++ b/src/H5EAtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@hdfgroup.org>
@@ -78,7 +76,7 @@ static herr_t H5EA__test_fill(void *nat_blk, size_t nelmts);
 static herr_t H5EA__test_encode(void *raw, const void *elmt, size_t nelmts, void *ctx);
 static herr_t H5EA__test_decode(const void *raw, void *elmt, size_t nelmts, void *ctx);
 static herr_t H5EA__test_debug(FILE *stream, int indent, int fwidth, hsize_t idx, const void *elmt);
-static void *H5EA__test_crt_dbg_context(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t H5_ATTR_UNUSED obj_addr);
+static void *H5EA__test_crt_dbg_context(H5F_t H5_ATTR_UNUSED *f, haddr_t H5_ATTR_UNUSED obj_addr);
 static herr_t H5EA__test_dst_dbg_context(void *_ctx);
 
 /*********************/
@@ -358,7 +356,7 @@ END_FUNC(STATIC)  /* end H5EA__test_debug() */
  */
 BEGIN_FUNC(STATIC, ERR,
 void *, NULL, NULL,
-H5EA__test_crt_dbg_context(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t H5_ATTR_UNUSED obj_addr))
+H5EA__test_crt_dbg_context(H5F_t H5_ATTR_UNUSED *f, haddr_t H5_ATTR_UNUSED obj_addr))
     
     /* Local variables */
     H5EA__ctx_cb_t *ctx;              /* Context for callbacks */
diff --git a/src/H5Edeprec.c b/src/H5Edeprec.c
index 1a13c01..9ff9f1f 100644
--- a/src/H5Edeprec.c
+++ b/src/H5Edeprec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -218,7 +216,7 @@ H5Epush1(const char *file, const char *func, unsigned line,
     H5TRACE6("e", "*s*sIuii*s", file, func, line, maj, min, str);
 
     /* Push the error on the default error stack */
-    if(H5E_push_stack(NULL, file, func, line, H5E_ERR_CLS_g, maj, min, str) < 0)
+    if(H5E__push_stack(NULL, file, func, line, H5E_ERR_CLS_g, maj, min, str) < 0)
         HGOTO_ERROR(H5E_ERROR, H5E_CANTSET, FAIL, "can't push error on stack")
 
 done:
diff --git a/src/H5Eint.c b/src/H5Eint.c
index 8eea147..15953af 100644
--- a/src/H5Eint.c
+++ b/src/H5Eint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -35,6 +33,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Epkg.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs                                  */
 #include "H5MMprivate.h"	/* Memory management			*/
@@ -664,7 +663,7 @@ H5E_set_auto(H5E_t *estack, const H5E_auto_op_t *op, void *client_data)
 /*-------------------------------------------------------------------------
  * Function:	H5E_printf_stack
  *
- * Purpose:	Printf-like wrapper around H5E_push_stack.
+ * Purpose:	Printf-like wrapper around H5E__push_stack.
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -737,7 +736,7 @@ H5E_printf_stack(H5E_t *estack, const char *file, const char *func, unsigned lin
 #endif /* H5_HAVE_VASPRINTF */
 
     /* Push the error on the stack */
-    if(H5E_push_stack(estack, file, func, line, cls_id, maj_id, min_id, tmp) < 0)
+    if(H5E__push_stack(estack, file, func, line, cls_id, maj_id, min_id, tmp) < 0)
         HGOTO_DONE(FAIL)
 
 done:
@@ -759,7 +758,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5E_push_stack
+ * Function:	H5E__push_stack
  *
  * Purpose:	Pushes a new error record onto error stack for the current
  *		thread.  The error has major and minor IDs MAJ_ID and
@@ -779,7 +778,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5E_push_stack(H5E_t *estack, const char *file, const char *func, unsigned line,
+H5E__push_stack(H5E_t *estack, const char *file, const char *func, unsigned line,
     hid_t cls_id, hid_t maj_id, hid_t min_id, const char *desc)
 {
     herr_t	ret_value = SUCCEED;      /* Return value */
@@ -791,7 +790,7 @@ H5E_push_stack(H5E_t *estack, const char *file, const char *func, unsigned line,
      *		HERROR().  HERROR() is called by HRETURN_ERROR() which could
      *		be called by FUNC_ENTER().
      */
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_PACKAGE_NOERR
 
     /* Sanity check */
     HDassert(cls_id > 0);
@@ -842,7 +841,7 @@ H5E_push_stack(H5E_t *estack, const char *file, const char *func, unsigned line,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5E_push_stack() */
+} /* end H5E__push_stack() */
 
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Emodule.h b/src/H5Emodule.h
index d624409..2d1bcd0 100644
--- a/src/H5Emodule.h
+++ b/src/H5Emodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Epkg.h b/src/H5Epkg.h
index 3af653a..fcde1ca 100644
--- a/src/H5Epkg.h
+++ b/src/H5Epkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -136,6 +134,8 @@ H5_DLL herr_t H5E__term_deprec_interface(void);
 #ifdef H5_HAVE_THREADSAFE
 H5_DLL H5E_t *H5E_get_stack(void);
 #endif /* H5_HAVE_THREADSAFE */
+H5_DLL herr_t H5E__push_stack(H5E_t *estack, const char *file, const char *func,
+    unsigned line, hid_t cls_id, hid_t maj_id, hid_t min_id, const char *desc);
 H5_DLL ssize_t H5E_get_msg(const H5E_msg_t *msg_ptr, H5E_type_t *type,
     char *msg, size_t size);
 H5_DLL herr_t H5E_print(const H5E_t *estack, FILE *stream, hbool_t bk_compat);
diff --git a/src/H5Eprivate.h b/src/H5Eprivate.h
index db413e3..19ab729 100644
--- a/src/H5Eprivate.h
+++ b/src/H5Eprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -74,8 +72,7 @@ typedef struct H5E_t H5E_t;
  * H5_END_TAG statements.  Resets the metadata tag before leaving the function.
  */
 #define HGOTO_ERROR_TAG(maj, min, ret_val, ...) {                              \
-   if(H5AC_tag(my_dxpl_id, prv_tag, NULL) < 0)                                 \
-      HERROR(H5E_CACHE, H5E_CANTTAG, "unable to apply metadata tag");          \
+   H5AC_tag(prv_tag, NULL);                                                    \
    HCOMMON_ERROR(maj, min, __VA_ARGS__);                                       \
    HGOTO_DONE(ret_val)                                                         \
 }
@@ -92,9 +89,8 @@ typedef struct H5E_t H5E_t;
  * HGOTO_DONE_TAG macro, used like HGOTO_DONE between H5_BEGIN_TAG and
  * H5_END_TAG statements.  Resets the metadata tag before leaving the function.
  */
-#define HGOTO_DONE_TAG(ret_val, err) {                                         \
-   if(H5AC_tag(my_dxpl_id, prv_tag, NULL) < 0)                                 \
-      HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, err, "unable to apply metadata tag") \
+#define HGOTO_DONE_TAG(ret_val) {                                              \
+   H5AC_tag(prv_tag, NULL);                                                    \
    HGOTO_DONE(ret_val)                                                         \
 }
 
@@ -183,8 +179,6 @@ extern	int	H5E_mpi_error_str_len;
 
 /* Library-private functions defined in H5E package */
 H5_DLL herr_t H5E_init(void);
-H5_DLL herr_t H5E_push_stack(H5E_t *estack, const char *file, const char *func,
-    unsigned line, hid_t cls_id, hid_t maj_id, hid_t min_id, const char *desc);
 H5_DLL herr_t H5E_printf_stack(H5E_t *estack, const char *file, const char *func,
     unsigned line, hid_t cls_id, hid_t maj_id, hid_t min_id, const char *fmt, ...)H5_ATTR_FORMAT(printf, 8, 9);
 H5_DLL herr_t H5E_clear_stack(H5E_t *estack);
diff --git a/src/H5Epublic.h b/src/H5Epublic.h
index 17a35d9..3eae2da 100644
--- a/src/H5Epublic.h
+++ b/src/H5Epublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5F.c b/src/H5F.c
index aef9d1d..6d62c08 100644
--- a/src/H5F.c
+++ b/src/H5F.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -23,20 +21,20 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Aprivate.h"		/* Attributes				*/
+#include "H5private.h"          /* Generic Functions                    */
+#include "H5Aprivate.h"         /* Attributes                           */
 #include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fpkg.h"             /* File access				*/
-#include "H5FDprivate.h"	/* File drivers				*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MFprivate.h"	/* File memory management		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Pprivate.h"		/* Property lists			*/
-#include "H5SMprivate.h"	/* Shared Object Header Messages	*/
-#include "H5Tprivate.h"		/* Datatypes				*/
+#include "H5CXprivate.h"        /* API Contexts                         */
+#include "H5Dprivate.h"         /* Datasets                             */
+#include "H5Eprivate.h"         /* Error handling                       */
+#include "H5Fpkg.h"             /* File access                          */
+#include "H5FDprivate.h"        /* File drivers                         */
+#include "H5Gprivate.h"         /* Groups                               */
+#include "H5Iprivate.h"         /* IDs                                  */
+#include "H5MFprivate.h"        /* File memory management               */
+#include "H5MMprivate.h"        /* Memory management                    */
+#include "H5Pprivate.h"         /* Property lists                       */
+#include "H5Tprivate.h"         /* Datatypes                            */
 
 
 /****************/
@@ -78,10 +76,10 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
 
 /* File ID class */
 static const H5I_class_t H5I_FILE_CLS[1] = {{
-    H5I_FILE,			/* ID class value */
-    0,				/* Class flags */
-    0,				/* # of reserved IDs for class */
-    (H5I_free_t)H5F_close	/* Callback routine for closing objects of this class */
+    H5I_FILE,            /* ID class value */
+    0,                   /* Class flags */
+    0,                   /* # of reserved IDs for class */
+    (H5I_free_t)H5F__close_cb  /* Callback routine for closing objects of this class */
 }};
 
 
@@ -115,27 +113,22 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_term_package
+ * Function: H5F_term_package
  *
- * Purpose:	Terminate this interface: free all memory and reset global
- *		variables to their initial values.  Release all ID groups
- *		associated with this interface.
- *
- * Return:	Success:	Positive if anything was done that might
- *				have affected other interfaces; zero
- *				otherwise.
- *
- *		Failure:        Never fails.
- *
- * Programmer:	Robb Matzke
- *              Friday, February 19, 1999
+ * Purpose:  Terminate this interface: free all memory and reset global
+ *           variables to their initial values.  Release all ID groups
+ *           associated with this interface.
  *
+ * Return:   Success:   Positive if anything was done that might
+ *                      have affected other interfaces;
+ *                      zero otherwise.
+ *           Failure:   Never fails.
  *-------------------------------------------------------------------------
  */
 int
 H5F_term_package(void)
 {
-    int	n = 0;
+    int    n = 0;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -143,7 +136,7 @@ H5F_term_package(void)
         if(H5I_nmembers(H5I_FILE) > 0) {
             (void)H5I_clear_type(H5I_FILE, FALSE, FALSE);
             n++; /*H5I*/
-	} /* end if */
+        } /* end if */
         else {
             /* Make certain we've cleaned up all the shared file objects */
             H5F_sfile_assert_num(0);
@@ -162,18 +155,14 @@ H5F_term_package(void)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fget_create_plist
- *
- * Purpose:	Get an atom for a copy of the file-creation property list for
- *		this file. This function returns an atom with a copy of the
- *		properties used to create a file.
- *
- * Return:	Success:	template ID
- *
- *		Failure:	FAIL
+ * Function: H5Fget_create_plist
  *
- * Programmer:	Unknown
+ * Purpose:  Get an atom for a copy of the file-creation property list for
+ *           this file. This function returns an atom with a copy of the
+ *           properties used to create a file.
  *
+ * Return:   Success:    template ID
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -202,24 +191,19 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fget_access_plist
+ * Function: H5Fget_access_plist
  *
- * Purpose:	Returns a copy of the file access property list of the
- *		specified file.
+ * Purpose:  Returns a copy of the file access property list of the
+ *           specified file.
  *
  *              NOTE: Make sure that, if you are going to overwrite
  *              information in the copied property list that was
  *              previously opened and assigned to the property list, then
  *              you must close it before overwriting the values.
  *
- * Return:	Success:	Object ID for a copy of the file access
- *				property list.
- *
- *		Failure:	FAIL
- *
- * Programmer:	Robb Matzke
- *              Wednesday, February 18, 1998
- *
+ * Return:   Success:    Object ID for a copy of the file access
+ *                       property list.
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -245,23 +229,19 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fget_obj_count
+ * Function: H5Fget_obj_count
  *
- * Purpose:	Public function returning the number of opened object IDs
- *		(files, datasets, groups and datatypes) in the same file.
- *
- * Return:	Non-negative on success; negative on failure.
- *
- * Programmer:	Raymond Lu
- *		Wednesday, Dec 5, 2001
+ * Purpose:  Public function returning the number of opened object IDs
+ *           (files, datasets, groups and datatypes) in the same file.
  *
+ * Return:   Non-negative on success; negative on failure.
  *-------------------------------------------------------------------------
  */
 ssize_t
 H5Fget_obj_count(hid_t file_id, unsigned types)
 {
     H5F_t    *f = NULL;         /* File to query */
-    size_t  obj_count = 0;      /* Number of opened objects */
+    size_t   obj_count = 0;     /* Number of opened objects */
     ssize_t  ret_value;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -286,21 +266,11 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fget_object_ids
- *
- * Purpose:	Public function to return a list of opened object IDs.
+ * Function: H5Fget_object_ids
  *
- * Return:	Non-negative on success; negative on failure.
- *
- * Programmer:  Raymond Lu
- *              Wednesday, Dec 5, 2001
- *
- * Modification:
- *              Raymond Lu
- *              24 September 2008
- *              Changed the return value to ssize_t and MAX_OBJTS to size_t to
- *              accommadate potential large number of objects.
+ * Purpose:  Public function to return a list of opened object IDs.
  *
+ * Return:   Non-negative on success; negative on failure.
  *-------------------------------------------------------------------------
  */
 ssize_t
@@ -341,10 +311,6 @@ done:
  *
  * Return:      Success:        non-negative value.
  *              Failure:        negative.
- *
- * Programmer:  Raymond Lu
- *              Sep. 16, 2002
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -374,23 +340,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fis_hdf5
- *
- * Purpose:	Check the file signature to detect an HDF5 file.
- *
- * Bugs:	This function is not robust: it only uses the default file
- *		driver when attempting to open the file when in fact it
- *		should use all known file drivers.
- *
- * Return:	Success:	TRUE/FALSE
+ * Function: H5Fis_hdf5
  *
- *		Failure:	Negative
+ * Purpose:  Check the file signature to detect an HDF5 file.
  *
- * Programmer:	Unknown
+ * Bugs:     This function is not robust: it only uses the default file
+ *           driver when attempting to open the file when in fact it
+ *           should use all known file drivers.
  *
- * Modifications:
- *		Robb Matzke, 1999-08-02
- *		Rewritten to use the virtual file layer.
+ * Return:   Success:    TRUE/FALSE
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 htri_t
@@ -406,228 +365,180 @@ H5Fis_hdf5(const char *name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "no file name specified")
 
     /* call the private is_HDF5 function */
-    if((ret_value = H5F__is_hdf5(name, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id)) < 0)
+    /* (Should not trigger raw data I/O - QAK, 2018/01/03) */
+    if((ret_value = H5F__is_hdf5(name)) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable open file")
 
 done:
-
     FUNC_LEAVE_API(ret_value)
 } /* end H5Fis_hdf5() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fcreate
- *
- * Purpose:	This is the primary function for creating HDF5 files . The
- *		flags parameter determines whether an existing file will be
- *		overwritten or not.  All newly created files are opened for
- *		both reading and writing.  All flags may be combined with the
- *		bit-wise OR operator (`|') to change the behavior of the file
- *		create call.
- *
- *		The more complex behaviors of a file's creation and access
- *		are controlled through the file-creation and file-access
- *		property lists.  The value of H5P_DEFAULT for a template
- *		value indicates that the library should use the default
- *		values for the appropriate template.
- *
- * See also:	H5Fpublic.h for the list of supported flags. H5Ppublic.h for
- * 		the list of file creation and file access properties.
- *
- * Return:	Success:	A file ID
- *
- *		Failure:	FAIL
- *
- * Programmer:	Unknown
- *
+ * Function:    H5Fcreate
+ *
+ * Purpose:     This is the primary function for creating HDF5 files . The
+ *              flags parameter determines whether an existing file will be
+ *              overwritten or not.  All newly created files are opened for
+ *              both reading and writing.  All flags may be combined with the
+ *              bit-wise OR operator (`|') to change the behavior of the file
+ *              create call.
+ *
+ *              The more complex behaviors of a file's creation and access
+ *              are controlled through the file-creation and file-access
+ *              property lists.  The value of H5P_DEFAULT for a template
+ *              value indicates that the library should use the default
+ *              values for the appropriate template.
+ *
+ * See also:    H5Fpublic.h for the list of supported flags. H5Ppublic.h for
+ *              the list of file creation and file access properties.
+ *
+ * Return:      Success:    A file ID
+ *              Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 hid_t
 H5Fcreate(const char *filename, unsigned flags, hid_t fcpl_id, hid_t fapl_id)
 {
-    hbool_t      ci_load = FALSE;       /* whether MDC ci load requested */
-    hbool_t      ci_write = FALSE;      /* whether MDC CI write requested */
-    H5F_t	*new_file = NULL;	/*file struct for new file	*/
-    hid_t        dxpl_id = H5AC_ind_read_dxpl_id; /*dxpl used by library        */
-    hid_t	 ret_value;	        /*return value			*/
+    H5F_t   *new_file = NULL;               /* file struct for new file                 */
+    hid_t   ret_value;                      /* return value                             */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE4("i", "*sIuii", filename, flags, fcpl_id, fapl_id);
 
     /* Check/fix arguments */
-    if(!filename || !*filename)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file name")
+    if (!filename || !*filename)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid file name")
+
     /* In this routine, we only accept the following flags:
      *          H5F_ACC_EXCL, H5F_ACC_TRUNC and H5F_ACC_SWMR_WRITE
      */
-    if(flags & ~(H5F_ACC_EXCL | H5F_ACC_TRUNC | H5F_ACC_SWMR_WRITE))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid flags")
+    if (flags & ~(H5F_ACC_EXCL | H5F_ACC_TRUNC | H5F_ACC_SWMR_WRITE))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid flags")
+
     /* The H5F_ACC_EXCL and H5F_ACC_TRUNC flags are mutually exclusive */
-    if((flags & H5F_ACC_EXCL) && (flags & H5F_ACC_TRUNC))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "mutually exclusive flags for file creation")
+    if ((flags & H5F_ACC_EXCL) && (flags & H5F_ACC_TRUNC))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "mutually exclusive flags for file creation")
 
     /* Check file creation property list */
-    if(H5P_DEFAULT == fcpl_id)
+    if (H5P_DEFAULT == fcpl_id)
         fcpl_id = H5P_FILE_CREATE_DEFAULT;
     else
-        if(TRUE != H5P_isa_class(fcpl_id, H5P_FILE_CREATE))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not file create property list")
+        if (TRUE != H5P_isa_class(fcpl_id, H5P_FILE_CREATE))
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not file create property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&fapl_id, H5P_CLS_FACC, &dxpl_id, H5I_INVALID_HID, TRUE) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&fapl_id, H5P_CLS_FACC, H5I_INVALID_HID, TRUE) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
-    /*
-     * Adjust bit flags by turning on the creation bit and making sure that
+    /* Adjust bit flags by turning on the creation bit and making sure that
      * the EXCL or TRUNC bit is set.  All newly-created files are opened for
      * reading and writing.
      */
-    if (0==(flags & (H5F_ACC_EXCL|H5F_ACC_TRUNC)))
+    if (0 == (flags & (H5F_ACC_EXCL | H5F_ACC_TRUNC)))
         flags |= H5F_ACC_EXCL;	 /*default*/
     flags |= H5F_ACC_RDWR | H5F_ACC_CREAT;
 
-    /*
-     * Create a new file or truncate an existing file.
-     */
-    if(NULL == (new_file = H5F_open(filename, flags, fcpl_id, fapl_id, dxpl_id)))
-        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to create file")
-
-   /* Check to see if both SWMR and cache image are requested.  Fail if so */
-   if(H5C_cache_image_status(new_file, &ci_load, &ci_write) < 0)
-       HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MDC cache image status")
-   if((ci_load || ci_write) && (flags & (H5F_ACC_SWMR_READ | H5F_ACC_SWMR_WRITE)))
-       HGOTO_ERROR(H5E_FILE, H5E_UNSUPPORTED, FAIL, "can't have both SWMR and cache image")
+    /* Create a new file or truncate an existing file. */
+    if (NULL == (new_file = H5F__create(filename, flags, fcpl_id, fapl_id)))
+        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, H5I_INVALID_HID, "unable to create file")
 
     /* Get an atom for the file */
-    if((ret_value = H5I_register(H5I_FILE, new_file, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file")
+    if ((ret_value = H5I_register(H5I_FILE, new_file, TRUE)) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to atomize file")
 
     /* Keep this ID in file object structure */
     new_file->file_id = ret_value;
 
 done:
     if(ret_value < 0 && new_file && H5F_try_close(new_file, NULL) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file")
+        HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, H5I_INVALID_HID, "problems closing file")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Fcreate() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fopen
- *
- * Purpose:	This is the primary function for accessing existing HDF5
- *		files.  The FLAGS argument determines whether writing to an
- *		existing file will be allowed or not.  All flags may be
- *		combined with the bit-wise OR operator (`|') to change the
- *		behavior of the file open call.  The more complex behaviors
- *		of a file's access are controlled through the file-access
- *		property list.
- *
- * See Also:	H5Fpublic.h for a list of possible values for FLAGS.
+ * Function:    H5Fopen
  *
- * Return:	Success:	A file ID
+ * Purpose:     This is the primary function for accessing existing HDF5
+ *              files.  The FLAGS argument determines whether writing to an
+ *              existing file will be allowed or not.  All flags may be
+ *              combined with the bit-wise OR operator (`|') to change the
+ *              behavior of the file open call.  The more complex behaviors
+ *              of a file's access are controlled through the file-access
+ *              property list.
  *
- *		Failure:	FAIL
+ * See Also:    H5Fpublic.h for a list of possible values for FLAGS.
  *
- * Programmer:	Unknown
+ * Return:      Success:    A file ID
  *
- * Modifications:
- *	  	Robb Matzke, 1997-07-18
- *		File struct creation and destruction is through H5F_new() and
- *		H5F__dest(). Reading the root symbol table entry is done with
- *		H5G_decode().
+ *              Failure:    FAIL
  *
- *  		Robb Matzke, 1997-09-23
- *		Most of the work is now done by H5F_open() since H5Fcreate()
- *		and H5Fopen() originally contained almost identical code.
- *
- *	 	Robb Matzke, 1998-02-18
- *		Added better error checking for the flags and the file access
- *		property list.  It used to be possible to make the library
- *		dump core by passing an object ID that was not a file access
- *		property list.
- *
- * 		Robb Matzke, 1999-08-02
- *		The file access property list is passed to the H5F_open() as
- *		object IDs.
  *-------------------------------------------------------------------------
  */
 hid_t
 H5Fopen(const char *filename, unsigned flags, hid_t fapl_id)
 {
-    hbool_t      ci_load = FALSE;       /* whether MDC ci load requested */
-    hbool_t      ci_write = FALSE;      /* whether MDC CI write requested */
-    H5F_t	*new_file = NULL;	/*file struct for new file	*/
-    hid_t        dxpl_id = H5AC_ind_read_dxpl_id; /*dxpl used by library        */
-    hid_t	 ret_value;	        /*return value			*/
+    H5F_t       *new_file = NULL;                   /* file struct for new file                 */
+    hid_t       ret_value;                          /* return value                             */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "*sIui", filename, flags, fapl_id);
 
     /* Check/fix arguments. */
     if(!filename || !*filename)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file name")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid file name")
     /* Reject undefined flags (~H5F_ACC_PUBLIC_FLAGS) and the H5F_ACC_TRUNC & H5F_ACC_EXCL flags */
     if((flags & ~H5F_ACC_PUBLIC_FLAGS) ||
             (flags & H5F_ACC_TRUNC) || (flags & H5F_ACC_EXCL))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file open flags")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid file open flags")
     /* Asking for SWMR write access on a read-only file is invalid */
     if((flags & H5F_ACC_SWMR_WRITE) && 0 == (flags & H5F_ACC_RDWR))
-        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "SWMR write access on a file open for read-only access is not allowed")
+        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, H5I_INVALID_HID, "SWMR write access on a file open for read-only access is not allowed")
     /* Asking for SWMR read access on a non-read-only file is invalid */
     if((flags & H5F_ACC_SWMR_READ) && (flags & H5F_ACC_RDWR))
-        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "SWMR read access on a file open for read-write access is not allowed")
+        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, H5I_INVALID_HID, "SWMR read access on a file open for read-write access is not allowed")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&fapl_id, H5P_CLS_FACC, &dxpl_id, H5I_INVALID_HID, TRUE) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&fapl_id, H5P_CLS_FACC, H5I_INVALID_HID, TRUE) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Open the file */
-    if(NULL == (new_file = H5F_open(filename, flags, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id)))
-        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to open file")
-
-    /* Check to see if both SWMR and cache image are requested.  Fail if so */
-    if(H5C_cache_image_status(new_file, &ci_load, &ci_write) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MDC cache image status")
-    if((ci_load || ci_write) && (flags & (H5F_ACC_SWMR_READ | H5F_ACC_SWMR_WRITE)))
-        HGOTO_ERROR(H5E_FILE, H5E_UNSUPPORTED, FAIL, "can't have both SWMR and cache image")
+    if(NULL == (new_file = H5F__open(filename, flags, H5P_FILE_CREATE_DEFAULT, fapl_id)))
+        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, H5I_INVALID_HID, "unable to open file")
 
     /* Get an atom for the file */
     if((ret_value = H5I_register(H5I_FILE, new_file, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file handle")
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to atomize file handle")
 
     /* Keep this ID in file object structure */
     new_file->file_id = ret_value;
 
 done:
     if(ret_value < 0 && new_file && H5F_try_close(new_file, NULL) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file")
+        HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, H5I_INVALID_HID, "problems closing file")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Fopen() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fflush
- *
- * Purpose:	Flushes all outstanding buffers of a file to disk but does
- *		not remove them from the cache.  The OBJECT_ID can be a file,
- *		dataset, group, attribute, or named data type.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5Fflush
  *
- * Programmer:	Robb Matzke
- *              Thursday, August  6, 1998
+ * Purpose:  Flushes all outstanding buffers of a file to disk but does
+ *           not remove them from the cache.  The OBJECT_ID can be a file,
+ *           dataset, group, attribute, or named data type.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fflush(hid_t object_id, H5F_scope_t scope)
 {
-    H5F_t	*f = NULL;              /* File to flush */
-    H5O_loc_t	*oloc = NULL;           /* Object location for ID */
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    H5F_t      *f = NULL;              /* File to flush */
+    H5O_loc_t  *oloc = NULL;           /* Object location for ID */
+    herr_t      ret_value = SUCCEED;   /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("e", "iFs", object_id, scope);
@@ -640,7 +551,7 @@ H5Fflush(hid_t object_id, H5F_scope_t scope)
 
         case H5I_GROUP:
             {
-                H5G_t	*grp;
+                H5G_t    *grp;
 
                 if(NULL == (grp = (H5G_t *)H5I_object(object_id)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid group identifier")
@@ -650,7 +561,7 @@ H5Fflush(hid_t object_id, H5F_scope_t scope)
 
         case H5I_DATATYPE:
             {
-                H5T_t	*type;
+                H5T_t    *type;
 
                 if(NULL == (type = (H5T_t *)H5I_object(object_id)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid type identifier")
@@ -660,7 +571,7 @@ H5Fflush(hid_t object_id, H5F_scope_t scope)
 
         case H5I_DATASET:
             {
-                H5D_t	*dset;
+                H5D_t    *dset;
 
                 if(NULL == (dset = (H5D_t *)H5I_object(object_id)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid dataset identifier")
@@ -670,7 +581,7 @@ H5Fflush(hid_t object_id, H5F_scope_t scope)
 
         case H5I_ATTR:
             {
-                H5A_t	*attr;
+                H5A_t    *attr;
 
                 if(NULL == (attr = (H5A_t *)H5I_object(object_id)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid attribute identifier")
@@ -703,24 +614,22 @@ H5Fflush(hid_t object_id, H5F_scope_t scope)
 
     /* Flush the file */
     /*
-     * Nothing to do if the file is read only.	This determination is
+     * Nothing to do if the file is read only.    This determination is
      * made at the shared open(2) flags level, implying that opening a
      * file twice, once for read-only and once for read-write, and then
      * calling H5Fflush() with the read-only handle, still causes data
      * to be flushed.
      */
     if(H5F_ACC_RDWR & H5F_INTENT(f)) {
-        /* Flush other files, depending on scope */
-        if(H5F_SCOPE_GLOBAL == scope) {
-            /* Call the flush routine for mounted file hierarchies */
-            if(H5F_flush_mounts(f, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush mounted file hierarchy")
-        } /* end if */
-        else {
-            /* Call the flush routine, for this file */
-            if(H5F__flush(f, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id, FALSE) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information")
-        } /* end else */
+	hid_t fapl_id = H5P_DEFAULT;    /* FAPL to use */
+
+        /* Verify access property list and set up collective metadata if appropriate */
+        if(H5CX_set_apl(&fapl_id, H5P_CLS_FACC, object_id, TRUE) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set access property list info")
+
+        /* Flush the file */
+        if(H5F__flush(f, scope) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information")
     } /* end if */
 
 done:
@@ -729,60 +638,34 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fclose
- *
- * Purpose:	This function closes the file specified by FILE_ID by
- *		flushing all data to storage, and terminating access to the
- *		file through FILE_ID.  If objects (e.g., datasets, groups,
- *		etc.) are open in the file then the underlying storage is not
- *		closed until those objects are closed; however, all data for
- *		the file and the open objects is flushed.
- *
- * Return:	Success:	Non-negative
- *
- *		Failure:	Negative
+ * Function: H5Fclose
  *
- * Programmer:	Robb Matzke
- *              Saturday, February 20, 1999
- *
- * Modifications:
+ * Purpose:  This function closes the file specified by FILE_ID by
+ *        flushing all data to storage, and terminating access to the
+ *        file through FILE_ID.  If objects (e.g., datasets, groups,
+ *        etc.) are open in the file then the underlying storage is not
+ *        closed until those objects are closed; however, all data for
+ *        the file and the open objects is flushed.
  *
+ * Return:   Success:    Non-negative
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fclose(hid_t file_id)
 {
-    H5F_t       *f = NULL;
-    int         nref;
-    herr_t	ret_value = SUCCEED;
+    herr_t      ret_value = SUCCEED;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", file_id);
 
-    /* Check/fix arguments. */
+    /* Check arguments */
     if(H5I_FILE != H5I_get_type(file_id))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file ID")
+        HGOTO_ERROR(H5E_FILE, H5E_BADTYPE, FAIL, "not a file ID")
 
-    /* Flush file if this is the last reference to this id and we have write
-     * intent, unless it will be flushed by the "shared" file being closed.
-     * This is only necessary to replicate previous behaviour, and could be
-     * disabled by an option/property to improve performance. */
-    if(NULL == (f = (H5F_t *)H5I_object(file_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid file identifier")
-    if((f->shared->nrefs > 1) && (H5F_INTENT(f) & H5F_ACC_RDWR)) {
-        if((nref = H5I_get_ref(file_id, FALSE)) < 0)
-            HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't get ID ref count")
-        if(nref == 1)
-            if(H5F__flush(f, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id, FALSE) < 0)
-                HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush cache")
-    } /* end if */
-
-    /*
-     * Decrement reference count on atom.  When it reaches zero the file will
-     * be closed.
-     */
-    if(H5I_dec_app_ref(file_id) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTCLOSEFILE, FAIL, "decrementing file ID failed")
+    /* Close the file */
+    if(H5F__close(file_id) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "closing file ID failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -790,29 +673,24 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Freopen
- *
- * Purpose:	Reopen a file.  The new file handle which is returned points
- *		to the same file as the specified file handle.  Both handles
- *		share caches and other information.  The only difference
- *		between the handles is that the new handle is not mounted
- *		anywhere and no files are mounted on it.
+ * Function: H5Freopen
  *
- * Return:	Success:	New file ID
- *
- *		Failure:	FAIL
- *
- * Programmer:	Robb Matzke
- *              Friday, October 16, 1998
+ * Purpose:  Reopen a file.  The new file handle which is returned points
+ *        to the same file as the specified file handle.  Both handles
+ *        share caches and other information.  The only difference
+ *        between the handles is that the new handle is not mounted
+ *        anywhere and no files are mounted on it.
  *
+ * Return:   Success:    New file ID
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 hid_t
 H5Freopen(hid_t file_id)
 {
-    H5F_t	*old_file = NULL;
-    H5F_t	*new_file = NULL;
-    hid_t	ret_value;
+    H5F_t    *old_file = NULL;
+    H5F_t    *new_file = NULL;
+    hid_t    ret_value;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("i", "i", file_id);
@@ -838,7 +716,7 @@ H5Freopen(hid_t file_id)
 
 done:
     if(ret_value < 0 && new_file)
-        if(H5F__dest(new_file, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id, FALSE) < 0)
+        if(H5F__dest(new_file, FALSE) < 0)
             HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file")
 
     FUNC_LEAVE_API(ret_value)
@@ -846,16 +724,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fget_intent
- *
- * Purpose:	Public API to retrieve the file's 'intent' flags passed
- *              during H5Fopen()
- *
- * Return:	Non-negative on success/negative on failure
+ * Function: H5Fget_intent
  *
- * Programmer:	James Laird
- *		August 23, 2006
+ * Purpose:  Public API to retrieve the file's 'intent' flags passed
+ *           during H5Fopen()
  *
+ * Return:   Non-negative on success/negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -868,7 +742,7 @@ H5Fget_intent(hid_t file_id, unsigned *intent_flags)
 
     /* If no intent flags were passed in, exit quietly */
     if(intent_flags) {
-        H5F_t * file;           /* Pointer to file structure */
+        H5F_t *file;           /* Pointer to file structure */
 
         /* Get the internal file structure */
         if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
@@ -906,18 +780,13 @@ done:
  *
  * Return:      Success:        Amount of free space for type
  *              Failure:        Negative
- *
- * Programmer:  Quincey Koziol
- *              koziol@ncsa.uiuc.edu
- *              Oct  6, 2003
- *
  *-------------------------------------------------------------------------
  */
 hssize_t
 H5Fget_freespace(hid_t file_id)
 {
     H5F_t      *file;           /* File object for file ID */
-    hsize_t	tot_space;	/* Amount of free space in the file */
+    hsize_t     tot_space;      /* Amount of free space in the file */
     hssize_t    ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -927,8 +796,8 @@ H5Fget_freespace(hid_t file_id)
     if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID")
 
-    /* Go get the actual amount of free space in the file */
-    if(H5MF_get_freespace(file, H5AC_ind_read_dxpl_id, &tot_space, NULL) < 0)
+    /* Get the free space in the file */
+    if(H5F__get_freespace(file, &tot_space) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to check free space for file")
 
     ret_value = (hssize_t)tot_space;
@@ -943,23 +812,16 @@ done:
  *
  * Purpose:     Retrieves the file size of the HDF5 file. This function
  *              is called after an existing file is opened in order
- *		to learn the true size of the underlying file.
+ *        to learn the true size of the underlying file.
  *
  * Return:      Success:        Non-negative
  *              Failure:        Negative
- *
- * Programmer:  David Pitt
- *              david.pitt@bigpond.com
- *              Apr 27, 2004
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fget_filesize(hid_t file_id, hsize_t *size)
 {
     H5F_t       *file;                  /* File object for file ID */
-    haddr_t     eof;                    /* End of file address */
-    haddr_t     eoa;                    /* End of allocation address */
     haddr_t     max_eof_eoa;            /* Maximum of the EOA & EOF */
     haddr_t     base_addr;              /* Base address for the file */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -972,11 +834,9 @@ H5Fget_filesize(hid_t file_id, hsize_t *size)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID")
 
     /* Go get the actual file size */
-    eof = H5FD_get_eof(file->shared->lf, H5FD_MEM_DEFAULT);
-    eoa = H5FD_get_eoa(file->shared->lf, H5FD_MEM_DEFAULT);
-    max_eof_eoa = MAX(eof, eoa);
-    if(HADDR_UNDEF == max_eof_eoa)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "file get eof/eoa requests failed")
+    if(H5F__get_max_eof_eoa(file, &max_eof_eoa) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "file can't get max eof/eoa ")
+
     base_addr = H5FD_get_base_addr(file->shared->lf);
 
     if(size)
@@ -990,42 +850,38 @@ done:
 /*-------------------------------------------------------------------------
  * Function:    H5Fget_file_image
  *
- * Purpose:     If a buffer is provided (via the buf_ptr argument) and is 
- *		big enough (size in buf_len argument), load *buf_ptr with
- *		an image of the open file whose ID is provided in the 
- *		file_id parameter, and return the number of bytes copied
- *		to the buffer.
+ * Purpose:     If a buffer is provided (via the buf_ptr argument) and is
+ *        big enough (size in buf_len argument), load *buf_ptr with
+ *        an image of the open file whose ID is provided in the
+ *        file_id parameter, and return the number of bytes copied
+ *        to the buffer.
  *
- *		If the buffer exists, but is too small to contain an image
- *		of the indicated file, return a negative number.
+ *        If the buffer exists, but is too small to contain an image
+ *        of the indicated file, return a negative number.
  *
- *		Finally, if no buffer is provided, return the size of the 
- *		buffer needed.  This value is simply the eoa of the target 
- *		file.
+ *        Finally, if no buffer is provided, return the size of the
+ *        buffer needed.  This value is simply the eoa of the target
+ *        file.
  *
- *		Note that any user block is skipped.
+ *        Note that any user block is skipped.
  *
- *		Also note that the function may not be used on files 
- *		opened with either the split/multi file driver or the
- *		family file driver.
+ *        Also note that the function may not be used on files
+ *        opened with either the split/multi file driver or the
+ *        family file driver.
  *
- *		In the former case, the sparse address space makes the 
- *		get file image operation impractical, due to the size of
- *		the image typically required.
+ *        In the former case, the sparse address space makes the
+ *        get file image operation impractical, due to the size of
+ *        the image typically required.
  *
- *		In the case of the family file driver, the problem is
- *		the driver message in the super block, which will prevent
- *		the image being opened with any driver other than the
- *		family file driver -- which negates the purpose of the 
- *		operation.  This can be fixed, but no resources for 
- *		this now.
+ *        In the case of the family file driver, the problem is
+ *        the driver message in the super block, which will prevent
+ *        the image being opened with any driver other than the
+ *        family file driver -- which negates the purpose of the
+ *        operation.  This can be fixed, but no resources for
+ *        this now.
  *
  * Return:      Success:        Bytes copied / number of bytes needed.
  *              Failure:        negative value
- *
- * Programmer:  John Mainzer
- *              11/15/11
- *
  *-------------------------------------------------------------------------
  */
 ssize_t
@@ -1042,7 +898,8 @@ H5Fget_file_image(hid_t file_id, void *buf_ptr, size_t buf_len)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID")
 
     /* call private get_file_image function */
-    if((ret_value = H5F_get_file_image(file, buf_ptr, buf_len, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id)) < 0)
+    /* (Should not trigger raw data I/O - QAK, 2018/01/03) */
+    if((ret_value = H5F__get_file_image(file, buf_ptr, buf_len)) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get file image")
 
 done:
@@ -1051,21 +908,17 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5Fget_mdc_config
+ * Function: H5Fget_mdc_config
  *
- * Purpose:     Retrieves the current automatic cache resize configuration
- *		from the metadata cache, and return it in *config_ptr.
+ * Purpose:  Retrieves the current automatic cache resize configuration
+ *        from the metadata cache, and return it in *config_ptr.
  *
- *		Note that the version field of *config_Ptr must be correctly
- *		filled in by the caller.  This allows us to adapt for
- *		obsolete versions of the structure.
- *
- * Return:      Success:        SUCCEED
- *              Failure:        FAIL
- *
- * Programmer:  John Mainzer
- *              3/24/05
+ *        Note that the version field of *config_Ptr must be correctly
+ *        filled in by the caller.  This allows us to adapt for
+ *        obsolete versions of the structure.
  *
+ * Return:   Success:        SUCCEED
+ *           Failure:        FAIL
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1096,15 +949,11 @@ done:
  * Function:    H5Fset_mdc_config
  *
  * Purpose:     Sets the current metadata cache automatic resize
- *		configuration, using the contents of the instance of
- *		H5AC_cache_config_t pointed to by config_ptr.
+ *        configuration, using the contents of the instance of
+ *        H5AC_cache_config_t pointed to by config_ptr.
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  John Mainzer
- *              3/24/05
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1133,16 +982,12 @@ done:
  * Function:    H5Fget_mdc_hit_rate
  *
  * Purpose:     Retrieves the current hit rate from the metadata cache.
- *		This rate is the overall hit rate since the last time
- *		the hit rate statistics were reset either manually or
- *		automatically.
+ *        This rate is the overall hit rate since the last time
+ *        the hit rate statistics were reset either manually or
+ *        automatically.
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  John Mainzer
- *              3/24/05
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1174,17 +1019,13 @@ done:
  * Function:    H5Fget_mdc_size
  *
  * Purpose:     Retrieves the maximum size, minimum clean size, current
- *		size, and current number of entries from the metadata
- *		cache associated with the specified file.  If any of
- *		the ptr parameters are NULL, the associated datum is
- *		not returned.
+ *        size, and current number of entries from the metadata
+ *        cache associated with the specified file.  If any of
+ *        the ptr parameters are NULL, the associated datum is
+ *        not returned.
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  John Mainzer
- *              3/24/05
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1220,20 +1061,16 @@ done:
  * Function:    H5Freset_mdc_hit_rate_stats
  *
  * Purpose:     Reset the hit rate statistic whose current value can
- *		be obtained via the H5Fget_mdc_hit_rate() call.  Note
- *		that this statistic will also be reset once per epoch
- *		by the automatic cache resize code if it is enabled.
+ *        be obtained via the H5Fget_mdc_hit_rate() call.  Note
+ *        that this statistic will also be reset once per epoch
+ *        by the automatic cache resize code if it is enabled.
  *
- *		It is probably a bad idea to call this function unless
- *		you are controlling cache size from your program instead
- *		of using our cache size control code.
+ *        It is probably a bad idea to call this function unless
+ *        you are controlling cache size from your program instead
+ *        of using our cache size control code.
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  John Mainzer
- *              3/24/05
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1269,15 +1106,11 @@ done:
  *              If an error occurs then the buffer pointed to by `name' (NULL or non-NULL)
  *              is unchanged and the function returns a negative value.
  *
- * Note:	This routine returns the name that was used to open the file,
- *		not the actual name after resolving symlinks, etc.
+ * Note:        This routine returns the name that was used to open the file,
+ *              not the actual name after resolving symlinks, etc.
  *
  * Return:      Success:        The length of the file name
  *              Failure:        Negative
- *
- * Programmer:  Raymond Lu
- *              June 29, 2004
- *
  *-------------------------------------------------------------------------
  */
 ssize_t
@@ -1327,17 +1160,13 @@ done:
  * Function:    H5Fget_info2
  *
  * Purpose:     Gets general information about the file, including:
- *		1. Get storage size for superblock extension if there is one.
+ *              1. Get storage size for superblock extension if there is one.
  *              2. Get the amount of btree and heap storage for entries
  *                 in the SOHM table if there is one.
- *		3. The amount of free space tracked in the file.
+ *              3. The amount of free space tracked in the file.
  *
  * Return:      Success:        non-negative on success
  *              Failure:        Negative
- *
- * Programmer:  Vailin Choi
- *              July 11, 2007
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1371,26 +1200,9 @@ H5Fget_info2(hid_t obj_id, H5F_info2_t *finfo)
     } /* end else */
     HDassert(f->shared);
 
-    /* Reset file info struct */
-    HDmemset(finfo, 0, sizeof(*finfo));
-
-    /* Get the size of the superblock and any superblock extensions */
-    if(H5F__super_size(f, H5AC_ind_read_dxpl_id, &finfo->super.super_size, &finfo->super.super_ext_size) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Unable to retrieve superblock sizes")
-
-    /* Get the size of any persistent free space */
-    if(H5MF_get_freespace(f, H5AC_ind_read_dxpl_id, &finfo->free.tot_space, &finfo->free.meta_size) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Unable to retrieve free space information")
-
-    /* Check for SOHM info */
-    if(H5F_addr_defined(f->shared->sohm_addr))
-        if(H5SM_ih_size(f, H5AC_ind_read_dxpl_id, &finfo->sohm.hdr_size, &finfo->sohm.msgs_info) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Unable to retrieve SOHM index & heap storage info")
-
-    /* Set version # fields */
-    finfo->super.version = f->shared->sblock->super_vers;
-    finfo->sohm.version = f->shared->sohm_vers;
-    finfo->free.version = HDF5_FREESPACE_VERSION;
+    /* Get the file info */
+    if(H5F__get_info(f, finfo) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to retrieve file info")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1404,90 +1216,28 @@ done:
  *
  * Return:      Success:        non-negative on success
  *              Failure:        Negative
- *
- * Programmer:  Vailin Choi; October 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fget_metadata_read_retry_info(hid_t file_id, H5F_retry_info_t *info)
 {
-    H5F_t    	*file;           	/* File object for file ID */
-    unsigned 	i, j;			/* Local index variable */
-    size_t	tot_size;		/* Size of each retries[i] */
-    herr_t   	ret_value = SUCCEED;   	/* Return value */
+    H5F_t          *file;                       /* File object for file ID */
+    herr_t          ret_value = SUCCEED;        /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("e", "i*x", file_id, info);
 
     /* Check args */
-    if(!info)
+    if (!info)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
 
     /* Get the file pointer */
     if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID")
 
-    /* Copy the # of bins for "retries" array */
-    info->nbins = file->shared->retries_nbins;
-
-    /* Initialize the array of "retries" */
-    HDmemset(info->retries, 0, sizeof(info->retries));
-
-    /* Return if there are no bins -- no retries */
-    if(!info->nbins) 
-	HGOTO_DONE(SUCCEED);
-
-    /* Calculate size for each retries[i] */
-    tot_size = info->nbins * sizeof(uint32_t);
-
-    /* Map and copy information to info's retries for metadata items with tracking for read retries */
-    j = 0;
-    for(i = 0; i < H5AC_NTYPES; i++) {
-        switch(i) {
-            case H5AC_OHDR_ID:
-            case H5AC_OHDR_CHK_ID:
-            case H5AC_BT2_HDR_ID:
-            case H5AC_BT2_INT_ID:
-            case H5AC_BT2_LEAF_ID:
-            case H5AC_FHEAP_HDR_ID:
-            case H5AC_FHEAP_DBLOCK_ID:
-            case H5AC_FHEAP_IBLOCK_ID:
-            case H5AC_FSPACE_HDR_ID:
-            case H5AC_FSPACE_SINFO_ID:
-            case H5AC_SOHM_TABLE_ID:
-            case H5AC_SOHM_LIST_ID:
-            case H5AC_EARRAY_HDR_ID:
-            case H5AC_EARRAY_IBLOCK_ID:
-            case H5AC_EARRAY_SBLOCK_ID:
-            case H5AC_EARRAY_DBLOCK_ID:
-            case H5AC_EARRAY_DBLK_PAGE_ID:
-            case H5AC_FARRAY_HDR_ID:
-            case H5AC_FARRAY_DBLOCK_ID:
-            case H5AC_FARRAY_DBLK_PAGE_ID:
-            case H5AC_SUPERBLOCK_ID:
-                HDassert(j < H5F_NUM_METADATA_READ_RETRY_TYPES);
-                if(file->shared->retries[i] != NULL) {
-                    /* Allocate memory for retries[i]
-                     *
-                     * This memory should be released by the user with
-                     * the H5free_memory() call.
-                     */
-                    if(NULL == (info->retries[j] = (uint32_t *)H5MM_malloc(tot_size)))
-                        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-                    /* Copy the information */
-                    HDmemcpy(info->retries[j], file->shared->retries[i], tot_size);
-                } /* end if */
-
-                /* Increment location in info->retries[] array */
-                j++;
-                break;
-
-            default:
-                break;
-        } /* end switch */
-    } /* end for */
+    /* Get the retry info */
+    if(H5F__get_metadata_read_retry_info(file, info) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't get metadata read retry info")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1495,18 +1245,15 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5Fget_free_sections
- *
- * Purpose:     To get free-space section information for free-space manager with
- *		TYPE that is associated with file FILE_ID.
- *		If SECT_INFO is null, this routine returns the total # of free-space
- *		sections.
- *
- * Return:      Success:        non-negative, the total # of free space sections
- *              Failure:        negative
+ * Function: H5Fget_free_sections
  *
- * Programmer:  Vailin Choi; July 1st, 2009
+ * Purpose:  To get free-space section information for free-space manager with
+ *           TYPE that is associated with file FILE_ID.
+ *           If SECT_INFO is null, this routine returns the total # of free-space
+ *           sections.
  *
+ * Return:   Success:        non-negative, the total # of free space sections
+ *           Failure:        negative
  *-------------------------------------------------------------------------
  */
 ssize_t
@@ -1525,8 +1272,8 @@ H5Fget_free_sections(hid_t file_id, H5F_mem_t type, size_t nsects,
     if(sect_info && nsects == 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "nsects must be > 0")
 
-    /* Go get the free-space section information in the file */
-    if((ret_value = H5MF_get_free_sections(file, H5AC_ind_read_dxpl_id, type, nsects, sect_info)) < 0)
+    /* Get the free-space section information in the file */
+    if((ret_value = H5F__get_free_sections(file, type, nsects, sect_info)) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to check free space for file")
 
 done:
@@ -1543,16 +1290,13 @@ done:
  *
  * Return:      Success:        non-negative
  *              Failure:        negative
- *
- * Programmer:  Neil Fortner; December 30, 2010
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fclear_elink_file_cache(hid_t file_id)
 {
-    H5F_t         *file;        /* File */
-    herr_t        ret_value = SUCCEED; /* Return value */
+    H5F_t       *file;        /* File */
+    herr_t      ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", file_id);
@@ -1561,9 +1305,10 @@ H5Fclear_elink_file_cache(hid_t file_id)
     if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a file ID")
 
-    /* Release the EFC */
+    /* See if there's an EFC */
     if(file->shared->efc)
-        if(H5F_efc_release(file->shared->efc) < 0)
+        /* Release the EFC */
+        if(H5F__efc_release(file->shared->efc) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release external file cache")
 
 done:
@@ -1572,55 +1317,19 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fstart_swmr_write
- *
- * Purpose:	To enable SWMR writing mode for the file
- *		1) Refresh opened objects: part 1
- *		2) Flush & reset accumulator
- *		3) Mark the file in SWMR writing mode
- *	 	4) Set metadata read attempts and retries info
- *		5) Disable accumulator
- *		6) Evict all cache entries except the superblock
- *		7) Refresh opened objects (part 2)
- *		8) Unlock the file
- *
- *		Pre-conditions:
- *		1) The file being opened has v3 superblock
- *		2) The file is opened with H5F_ACC_RDWR
- *		3) The file is not already marked for SWMR writing
- *		4) Current implementaion for opened objects:
- *		   --only allow datasets and groups without attributes
- *		   --disallow named datatype with/without attributes
- *		   --disallow opened attributes attached to objects
- *		NOTE: Currently, only opened groups and datasets are allowed
- *	      	when enabling SWMR via H5Fstart_swmr_write().
- *	      	Will later implement a different approach--
- *	      	set up flush dependency/proxy even for file opened without
- *	      	SWMR to resolve issues with opened objects.
- *	
- * Return:	Non-negative on success/negative on failure
- *
- * Programmer:	
- *	Vailin Choi; Feb 2014
+ * Function:    H5Fstart_swmr_write
+ *
+ * Purpose:    To enable SWMR writing mode for the file
+ *
+ * Return:    Non-negative on success/negative on failure
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fstart_swmr_write(hid_t file_id)
 {
-    hbool_t ci_load = FALSE;    /* whether MDC ci load requested */
-    hbool_t ci_write = FALSE;   /* whether MDC CI write requested */
-    H5F_t *file = NULL;         /* File info */
-    size_t grp_dset_count=0; 	/* # of open objects: groups & datasets */
-    size_t nt_attr_count=0; 	/* # of opened named datatypes  + opened attributes */
-    hid_t *obj_ids=NULL;	/* List of ids */
-    H5G_loc_t *obj_glocs=NULL;	/* Group location of the object */
-    H5O_loc_t *obj_olocs=NULL;	/* Object location */
-    H5G_name_t *obj_paths=NULL;	/* Group hierarchy path */
-    size_t u;               	/* Local index variable */
-    hbool_t setup = FALSE;	/* Boolean flag to indicate whether SWMR setting is enabled */
-    H5F_io_info2_t fio_info;    /* I/O info for operation */
-    herr_t ret_value = SUCCEED;	/* Return value */
+    H5F_t      *file = NULL;            /* File info */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", file_id);
@@ -1629,170 +1338,15 @@ H5Fstart_swmr_write(hid_t file_id)
     if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file")
 
-    /* Should have write permission */
-    if((H5F_INTENT(file) & H5F_ACC_RDWR) == 0)
-        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "no write intent on file")
-
-    if(file->shared->sblock->super_vers < HDF5_SUPERBLOCK_VERSION_3)
-        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "file superblock version should be at least 3")
-    HDassert(file->shared->latest_flags == H5F_LATEST_ALL_FLAGS);
-
-    /* Should not be marked for SWMR writing mode already */
-    if(file->shared->sblock->status_flags & H5F_SUPER_SWMR_WRITE_ACCESS)
-        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "file already in SWMR writing mode")
-
-    HDassert(file->shared->sblock->status_flags & H5F_SUPER_WRITE_ACCESS);
-
-    /* Check to see if cache image is enabled.  Fail if so */
-    if(H5C_cache_image_status(file, &ci_load, &ci_write) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MDC cache image status")
-    if(ci_load || ci_write )
-        HGOTO_ERROR(H5E_FILE, H5E_UNSUPPORTED, FAIL, "can't have both SWMR and MDC cache image")
-
-    /* Flush data buffers */
-    if(H5F__flush(file, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information")
-
-    /* Get the # of opened named datatypes and attributes */
-    if(H5F_get_obj_count(file, H5F_OBJ_DATATYPE|H5F_OBJ_ATTR, FALSE, &nt_attr_count) < 0)
-        HGOTO_ERROR(H5E_INTERNAL, H5E_BADITER, FAIL, "H5F_get_obj_count failed")
-    if(nt_attr_count)
-        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "named datatypes and/or attributes opened in the file")
-
-    /* Get the # of opened datasets and groups */
-    if(H5F_get_obj_count(file, H5F_OBJ_GROUP|H5F_OBJ_DATASET, FALSE, &grp_dset_count) < 0)
-        HGOTO_ERROR(H5E_INTERNAL, H5E_BADITER, FAIL, "H5F_get_obj_count failed")
-
-    if(grp_dset_count) {
-        /* Allocate space for group and object locations */
-	if((obj_ids = (hid_t *) H5MM_malloc(grp_dset_count * sizeof(hid_t))) == NULL)
-	    HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for hid_t")
-	if((obj_glocs = (H5G_loc_t *) H5MM_malloc(grp_dset_count * sizeof(H5G_loc_t))) == NULL)
-	    HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for H5G_loc_t")
-	if((obj_olocs = (H5O_loc_t *) H5MM_malloc(grp_dset_count * sizeof(H5O_loc_t))) == NULL)
-	    HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for H5O_loc_t")
-	if((obj_paths = (H5G_name_t *) H5MM_malloc(grp_dset_count * sizeof(H5G_name_t))) == NULL)
-	    HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for H5G_name_t")
-
-        /* Get the list of opened object ids (groups & datasets) */
-	if(H5F_get_obj_ids(file, H5F_OBJ_GROUP|H5F_OBJ_DATASET, grp_dset_count, obj_ids, FALSE, &grp_dset_count) < 0)
-	    HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "H5F_get_obj_ids failed")
-
-        /* Refresh opened objects (groups, datasets) in the file */
-        for(u = 0; u < grp_dset_count; u++) {
-            H5O_loc_t *oloc;            /* object location */
-            H5G_loc_t tmp_loc;
-
-            /* Set up the id's group location */
-            obj_glocs[u].oloc = &obj_olocs[u];
-            obj_glocs[u].path = &obj_paths[u];
-            H5G_loc_reset(&obj_glocs[u]);
-
-            /* get the id's object location */
-            if((oloc = H5O_get_loc(obj_ids[u])) == NULL)
-                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an object")
-
-            /* Make deep local copy of object's location information */
-            H5G_loc(obj_ids[u], &tmp_loc);
-            H5G_loc_copy(&obj_glocs[u], &tmp_loc, H5_COPY_DEEP);
-
-            /* Close the object */
-            if(H5I_dec_ref(obj_ids[u]) < 0)
-                HGOTO_ERROR(H5E_ATOM, H5E_CANTCLOSEOBJ, FAIL, "decrementing object ID failed")
-        } /* end for */
-    } /* end if */
-
-    /* Set up I/O info for operation */
-    fio_info.f = file;
-    if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(H5AC_ind_read_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-
-    /* Flush and reset the accumulator */
-    if(H5F__accum_reset(&fio_info, TRUE) < 0)
-        HGOTO_ERROR(H5E_IO, H5E_CANTRESET, FAIL, "can't reset accumulator")
-
-    /* Turn on SWMR write in shared file open flags */
-    file->shared->flags |= H5F_ACC_SWMR_WRITE;
-
-    /* Mark the file in SWMR writing mode */
-    file->shared->sblock->status_flags |= H5F_SUPER_SWMR_WRITE_ACCESS;
-
-    /* Set up metadata read attempts */
-    file->shared->read_attempts = H5F_SWMR_METADATA_READ_ATTEMPTS;
-
-    /* Initialize "retries" and "retries_nbins" */
-    if(H5F_set_retries(file) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "can't set retries and retries_nbins")
-
-    /* Turn off usage of accumulator */
-    file->shared->feature_flags &= ~(unsigned)H5FD_FEAT_ACCUMULATE_METADATA;
-    if(H5FD_set_feature_flags(file->shared->lf, file->shared->feature_flags) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set feature_flags in VFD")
-
-    setup = TRUE;
-
-    /* Mark superblock as dirty */
-    if(H5F_super_dirty(file) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
-
-    /* Flush the superblock */
-    if(H5F_flush_tagged_metadata(file, H5AC__SUPERBLOCK_TAG, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush superblock")
-
-    /* Evict all flushed entries in the cache except the pinned superblock */
-    if(H5F__evict_cache_entries(file, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to evict file's cached information")
-
-    /* Refresh (reopen) the objects (groups & datasets) in the file */
-    for(u = 0; u < grp_dset_count; u++)
-        if(H5O_refresh_metadata_reopen(obj_ids[u], &obj_glocs[u], H5AC_ind_read_dxpl_id, TRUE) < 0)
-            HGOTO_ERROR(H5E_ATOM, H5E_CLOSEERROR, FAIL, "can't refresh-close object")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(file_id) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set collective metadata read info")
 
-    /* Unlock the file */
-    if(H5FD_unlock(file->shared->lf) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to unlock the file")
+    /* Call the internal routine */
+    if(H5F__start_swmr_write(file) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTCONVERT, FAIL, "unable to convert file format")
 
 done:
-    if(ret_value < 0 && setup) {
-        HDassert(file);
-
-        /* Re-enable accumulator */
-        file->shared->feature_flags |= (unsigned)H5FD_FEAT_ACCUMULATE_METADATA;
-        if(H5FD_set_feature_flags(file->shared->lf, file->shared->feature_flags) < 0)
-            HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set feature_flags in VFD")
-
-        /* Reset the # of read attempts */
-        file->shared->read_attempts = H5F_METADATA_READ_ATTEMPTS;
-        if(H5F_set_retries(file) < 0)
-            HDONE_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "can't set retries and retries_nbins")
-
-        /* Un-set H5F_ACC_SWMR_WRITE in shared open flags */
-        file->shared->flags &= ~H5F_ACC_SWMR_WRITE;
-
-        /* Unmark the file: not in SWMR writing mode */
-        file->shared->sblock->status_flags &= (uint8_t)(~H5F_SUPER_SWMR_WRITE_ACCESS);
-
-        /* Mark superblock as dirty */
-        if(H5F_super_dirty(file) < 0)
-            HDONE_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
-
-        /* Flush the superblock */
-        if(H5F_flush_tagged_metadata(file, H5AC__SUPERBLOCK_TAG, H5AC_ind_read_dxpl_id) < 0)
-            HDONE_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush superblock")
-    } /* end if */
-
-    /* Free memory */
-    if(obj_ids)
-        H5MM_xfree(obj_ids);
-    if(obj_glocs)
-        H5MM_xfree(obj_glocs);
-    if(obj_olocs)
-        H5MM_xfree(obj_olocs);
-    if(obj_paths)
-        H5MM_xfree(obj_paths);
-
     FUNC_LEAVE_API(ret_value)
 } /* end H5Fstart_swmr_write() */
 
@@ -1804,14 +1358,13 @@ done:
  *                  - Logging must have been set up via the fapl.
  *
  * Return:      Non-negative on success/Negative on errors
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fstart_mdc_logging(hid_t file_id)
 {
-    H5F_t *file;                /* File info */
-    herr_t ret_value = SUCCEED;	/* Return value */
+    H5F_t *file;                   /* File info */
+    herr_t ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", file_id);
@@ -1837,14 +1390,13 @@ done:
  *                  - Logging must have been set up via the fapl.
  *
  * Return:      Non-negative on success/Negative on errors
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fstop_mdc_logging(hid_t file_id)
 {
-    H5F_t *file;                /* File info */
-    herr_t ret_value = SUCCEED;	/* Return value */
+    H5F_t *file;                   /* File info */
+    herr_t ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", file_id);
@@ -1870,15 +1422,14 @@ done:
  *              log messages are being recorded at this time.
  *
  * Return:      Non-negative on success/Negative on errors
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fget_mdc_logging_status(hid_t file_id, hbool_t *is_enabled,
                           hbool_t *is_currently_logging)
 {
-    H5F_t *file;                /* File info */
-    herr_t ret_value = SUCCEED;	/* Return value */
+    H5F_t *file;                   /* File info */
+    herr_t ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE3("e", "i*b*b", file_id, is_enabled, is_currently_logging);
@@ -1897,114 +1448,75 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:   H5Fset_latest_format
+ * Function:    H5Fset_libver_bounds
  *
- * Purpose:    Enable switching the "latest format" flag while a file is open.
+ * Purpose:     Set to a different low and high bounds while a file is open.
+ *              This public routine is introduced in place of 
+ *              H5Fset_latest_format() starting release 1.10.2.
+ *              See explanation for H5Fset_latest_format() in H5Fdeprec.c.
  *
  * Return:     Non-negative on success/Negative on failure
- *
- * Programmer: Quincey Koziol
- *             Monday, September 21, 2015
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Fset_latest_format(hid_t file_id, hbool_t latest_format)
+H5Fset_libver_bounds(hid_t file_id, H5F_libver_t low, H5F_libver_t high)
 {
     H5F_t *f;                           /* File */
-    unsigned latest_flags;              /* Latest format flags for file */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    H5TRACE2("e", "ib", file_id, latest_format);
+    H5TRACE3("e", "iFvFv", file_id, low, high);
 
     /* Check args */
     if(NULL == (f = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
         HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "not a file ID")
 
-    /* Check if the value is changing */
-    latest_flags = H5F_USE_LATEST_FLAGS(f, H5F_LATEST_ALL_FLAGS);
-    if(latest_format != (H5F_LATEST_ALL_FLAGS == latest_flags)) {
-        /* Call the flush routine, for this file */
-        if(H5F__flush(f, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id, FALSE) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(file_id) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set collective metadata read info")
 
-        /* Toggle the 'latest format' flag */
-        H5F_SET_LATEST_FLAGS(f, latest_format ? H5F_LATEST_ALL_FLAGS : 0);
-    } /* end if */
+    /* Call internal set_libver_bounds function */
+    if(H5F__set_libver_bounds(f, low, high) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "cannot set low/high bounds")
 
 done:
     FUNC_LEAVE_API(ret_value)
-} /* end H5Fset_latest_format() */
+} /* end H5Fset_libver_bounds() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Fformat_convert_super (Internal)
- *
- * Purpose:	Downgrade the superblock version to v2 and
- *		downgrade persistent file space to non-persistent
- *		for 1.8 library.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5Fformat_convert
  *
- * Programmer:	Vailin Choi
- *              Jan 2016
+ * Purpose:  Downgrade the superblock version to v2 and
+ *           downgrade persistent file space to non-persistent
+ *           for 1.8 library.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Fformat_convert(hid_t fid)
 {
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    H5F_t    *f;                     /* File to flush */
+    herr_t    ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", fid);
 
-    if(H5I_FILE == H5I_get_type(fid)) {
-        H5F_t	*f;                     /* File to flush */
-        hbool_t	mark_dirty = FALSE;
+    if(H5I_FILE != H5I_get_type(fid))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object")
 
-        /* Get file object */
-        if(NULL == (f = (H5F_t *)H5I_object(fid)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid file identifier")
+    /* Get file object */
+    if(NULL == (f = (H5F_t *)H5I_object(fid)))
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid file identifier")
 
-        /* Check if the superblock should be downgraded */
-        if(f->shared->sblock->super_vers > HDF5_SUPERBLOCK_VERSION_V18_LATEST) {
-            f->shared->sblock->super_vers = HDF5_SUPERBLOCK_VERSION_V18_LATEST;
-            mark_dirty = TRUE;
-        } /* end if */
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(fid) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set collective metadata read info")
 
-        /* Check for persistent freespace manager, which needs to be downgraded */
-        if(!(f->shared->fs_strategy == H5F_FILE_SPACE_STRATEGY_DEF &&
-             f->shared->fs_persist == H5F_FREE_SPACE_PERSIST_DEF &&
-             f->shared->fs_threshold == H5F_FREE_SPACE_THRESHOLD_DEF &&
-             f->shared->fs_page_size == H5F_FILE_SPACE_PAGE_SIZE_DEF)) {
-            /* Check to remove free-space manager info message from superblock extension */
-            if(H5F_addr_defined(f->shared->sblock->ext_addr))
-                if(H5F_super_ext_remove_msg(f, H5AC_ind_read_dxpl_id, H5O_FSINFO_ID) < 0)
-                    HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "error in removing message from superblock extension")
-
-            /* Close freespace manager */
-            if(H5MF_try_close(f, H5AC_ind_read_dxpl_id) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to free free-space address")
-
-            /* Set non-persistent freespace manager */
-            f->shared->fs_strategy = H5F_FILE_SPACE_STRATEGY_DEF;
-            f->shared->fs_persist = H5F_FREE_SPACE_PERSIST_DEF;
-            f->shared->fs_threshold = H5F_FREE_SPACE_THRESHOLD_DEF;
-            f->shared->fs_page_size = H5F_FILE_SPACE_PAGE_SIZE_DEF;
-
-            /* Indicate that the superblock should be marked dirty */
-            mark_dirty = TRUE;
-        } /* end if */
-
-        /* Check if we should mark the superblock dirty */
-        if(mark_dirty)
-            /* Mark superblock as dirty */
-            if(H5F_super_dirty(f) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
-    } /* end if */
-    else
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file or file object")
+    /* Call the internal routine */
+    if(H5F__format_convert(f) < 0)
+	HGOTO_ERROR(H5E_FILE, H5E_CANTCONVERT, FAIL, "unable to convert file format")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2018,9 +1530,6 @@ done:
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Mohamad Chaarawi
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2054,9 +1563,6 @@ done:
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Mohamad Chaarawi
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2098,9 +1604,6 @@ done:
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Vailin Choi; March 2017
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2126,3 +1629,87 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Fget_mdc_image_info() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Fget_eoa
+ *
+ * Purpose:     Returns the address of the first byte after the last
+ *              allocated memory in the file.
+ *              (See H5FDget_eoa() in H5FD.c)
+ *
+ * Return:      Success:    First byte after allocated memory.
+ *              Failure:    HADDR_UNDEF
+ *
+ * Return:      Non-negative on success/Negative on errors
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Fget_eoa(hid_t file_id, haddr_t *eoa)
+{
+    H5F_t *file;                    /* File object for file ID */
+    haddr_t rel_eoa;                /* Relative address of EOA */
+    herr_t ret_value = SUCCEED;     /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE2("e", "i*a", file_id, eoa);
+
+    /* Check args */
+    if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "hid_t identifier is not a file ID")
+
+    /* This public routine will work only for drivers with this feature enabled.*/
+    /* We might introduce a new feature flag in the future */
+    if(!H5F_HAS_FEATURE(file, H5FD_FEAT_SUPPORTS_SWMR_IO))
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "must use a SWMR-compatible VFD for this public routine")
+
+    /* The real work */
+    if(HADDR_UNDEF == (rel_eoa = H5FD_get_eoa(file->shared->lf, H5FD_MEM_DEFAULT)))
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "get_eoa request failed")
+
+    /* (Note compensating for base address subtraction in internal routine) */
+    if(eoa)
+        *eoa = rel_eoa + H5FD_get_base_addr(file->shared->lf);
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* H5Fget_eoa() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Fincrement_filesize
+ *
+ * Purpose:     Set the EOA for the file to the maximum of (EOA, EOF) + increment
+ *
+ * Return:      Non-negative on success/Negative on errors
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Fincrement_filesize(hid_t file_id, hsize_t increment)
+{
+    H5F_t *file;                /* File object for file ID */
+    haddr_t max_eof_eoa;        /* Maximum of the relative EOA & EOF */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE2("e", "ih", file_id, increment);
+
+    /* Check args */
+    if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "hid_t identifier is not a file ID")
+
+    /* This public routine will work only for drivers with this feature enabled.*/
+    /* We might introduce a new feature flag in the future */
+    if(!H5F_HAS_FEATURE(file, H5FD_FEAT_SUPPORTS_SWMR_IO))
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "must use a SWMR-compatible VFD for this public routine")
+
+    /* Get the maximum of EOA and EOF */
+    if(H5F__get_max_eof_eoa(file, &max_eof_eoa) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "file can't get max eof/eoa ")
+
+    /* Set EOA to the maximum value + increment */
+    /* H5FD_set_eoa() will add base_addr to max_eof_eoa */
+    if(H5FD_set_eoa(file->shared->lf, H5FD_MEM_DEFAULT, max_eof_eoa + increment) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "driver set_eoa request failed")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* H5Fincrement_filesize() */
diff --git a/src/H5FA.c b/src/H5FA.c
index 90144e7..61aaa53 100644
--- a/src/H5FA.c
+++ b/src/H5FA.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -64,8 +62,8 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static H5FA_t *H5FA__new(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr,
-    hbool_t from_open, void *ctx_udata);
+static H5FA_t *H5FA__new(H5F_t *f, haddr_t fa_addr, hbool_t from_open,
+    void *ctx_udata);
 
 
 /*********************/
@@ -120,7 +118,7 @@ H5FL_BLK_DEFINE(fa_native_elmt);
  */
 BEGIN_FUNC(STATIC, ERR,
 H5FA_t *, NULL, NULL,
-H5FA__new(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, hbool_t from_open, void *ctx_udata))
+H5FA__new(H5F_t *f, haddr_t fa_addr, hbool_t from_open, void *ctx_udata))
 
     /* Local variables */
     H5FA_t *fa = NULL;          /* Pointer to new fixed array */
@@ -137,7 +135,7 @@ H5FA__new(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, hbool_t from_open, void *ctx
 	H5E_THROW(H5E_CANTALLOC, "memory allocation failed for fixed array info")
 
     /* Lock the array header into memory */
-    if(NULL == (hdr = H5FA__hdr_protect(f, dxpl_id, fa_addr, ctx_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5FA__hdr_protect(f, fa_addr, ctx_udata, H5AC__READ_ONLY_FLAG)))
 	H5E_THROW(H5E_CANTPROTECT, "unable to load fixed array header")
 
     /* Check for pending array deletion */
@@ -161,10 +159,10 @@ H5FA__new(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, hbool_t from_open, void *ctx
 
 CATCH
 
-    if(hdr && H5FA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5FA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
 	H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
     if(!ret_value)
-        if(fa && H5FA_close(fa, dxpl_id) < 0)
+        if(fa && H5FA_close(fa) < 0)
             H5E_THROW(H5E_CLOSEERROR, "unable to close fixed array")
 
 END_FUNC(STATIC)  /* end H5FA__new() */
@@ -185,7 +183,7 @@ END_FUNC(STATIC)  /* end H5FA__new() */
  */
 BEGIN_FUNC(PRIV, ERR,
 H5FA_t *, NULL, NULL,
-H5FA_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam, void *ctx_udata))
+H5FA_create(H5F_t *f, const H5FA_create_t *cparam, void *ctx_udata))
 
     /* Local variables */
     H5FA_t *fa = NULL;          /* Pointer to new fixed array */
@@ -201,11 +199,11 @@ H5FA_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam, void *ctx_udat
     HDcompile_assert(H5FA_NUM_CLS_ID == NELMTS(H5FA_client_class_g));
 
     /* Create fixed array header */
-    if(HADDR_UNDEF == (fa_addr = H5FA__hdr_create(f, dxpl_id, cparam, ctx_udata)))
+    if(HADDR_UNDEF == (fa_addr = H5FA__hdr_create(f, cparam, ctx_udata)))
         H5E_THROW(H5E_CANTINIT, "can't create fixed array header")
 
     /* Allocate and initialize new fixed array wrapper */
-    if(NULL == (fa = H5FA__new(f, dxpl_id, fa_addr, FALSE, ctx_udata)))
+    if(NULL == (fa = H5FA__new(f, fa_addr, FALSE, ctx_udata)))
 	H5E_THROW(H5E_CANTINIT, "allocation and/or initialization failed for fixed array wrapper")
 
     /* Set the return value */
@@ -214,7 +212,7 @@ H5FA_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam, void *ctx_udat
 CATCH
 
     if(!ret_value)
-        if(fa && H5FA_close(fa, dxpl_id) < 0)
+        if(fa && H5FA_close(fa) < 0)
             H5E_THROW(H5E_CLOSEERROR, "unable to close fixed array")
 
 END_FUNC(PRIV)  /* end H5FA_create() */
@@ -235,7 +233,7 @@ END_FUNC(PRIV)  /* end H5FA_create() */
  */
 BEGIN_FUNC(PRIV, ERR,
 H5FA_t *, NULL, NULL,
-H5FA_open(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata))
+H5FA_open(H5F_t *f, haddr_t fa_addr, void *ctx_udata))
 
     /* Local variables */
     H5FA_t *fa = NULL;          /* Pointer to new fixed array wrapper */
@@ -247,7 +245,7 @@ H5FA_open(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata))
     HDassert(H5F_addr_defined(fa_addr));
 
     /* Allocate and initialize new fixed array wrapper */
-    if(NULL == (fa = H5FA__new(f, dxpl_id, fa_addr, TRUE, ctx_udata)))
+    if(NULL == (fa = H5FA__new(f, fa_addr, TRUE, ctx_udata)))
 	H5E_THROW(H5E_CANTINIT, "allocation and/or initialization failed for fixed array wrapper")
 
     /* Set the return value */
@@ -256,7 +254,7 @@ H5FA_open(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata))
 CATCH
 
     if(!ret_value)
-        if(fa && H5FA_close(fa, dxpl_id) < 0)
+        if(fa && H5FA_close(fa) < 0)
             H5E_THROW(H5E_CLOSEERROR, "unable to close fixed array")
 
 END_FUNC(PRIV)  /* end H5FA_open() */
@@ -337,7 +335,7 @@ END_FUNC(PRIV)  /* end H5FA_get_addr() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA_set(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, const void *elmt))
+H5FA_set(const H5FA_t *fa, hsize_t idx, const void *elmt))
 
     /* Local variables */
     H5FA_hdr_t *hdr = fa->hdr;          /* Header for fixed array */
@@ -359,7 +357,7 @@ H5FA_set(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, const void *elmt))
     /* Check if we need to create the fixed array data block */
     if(!H5F_addr_defined(hdr->dblk_addr)) {
         /* Create the data block */
-        hdr->dblk_addr = H5FA__dblock_create(hdr, dxpl_id, &hdr_dirty);
+        hdr->dblk_addr = H5FA__dblock_create(hdr, &hdr_dirty);
         if(!H5F_addr_defined(hdr->dblk_addr))
             H5E_THROW(H5E_CANTCREATE, "unable to create fixed array data block")
     } /* end if */
@@ -367,7 +365,7 @@ H5FA_set(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, const void *elmt))
     HDassert(idx < hdr->cparam.nelmts);
 
     /* Protect data block */
-    if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, hdr->dblk_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (dblock = H5FA__dblock_protect(hdr, hdr->dblk_addr, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)hdr->dblk_addr)
 
     /* Check for paging data block */
@@ -399,7 +397,7 @@ H5FA_set(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, const void *elmt))
         /* Check if the page has been created yet */
         if(!H5VM_bit_get(dblock->dblk_page_init, page_idx)) {
             /* Create the data block page */
-            if(H5FA__dblk_page_create(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts) < 0)
+            if(H5FA__dblk_page_create(hdr, dblk_page_addr, dblk_page_nelmts) < 0)
                 H5E_THROW(H5E_CANTCREATE, "unable to create data block page")
 
 	    /* Mark data block page as initialized in data block */
@@ -408,7 +406,7 @@ H5FA_set(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, const void *elmt))
 	} /* end if */
 
         /* Protect the data block page */
-	if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts, H5AC__NO_FLAGS_SET)))
+	if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dblk_page_addr, dblk_page_nelmts, H5AC__NO_FLAGS_SET)))
 	    H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
         /* Set the element in the data block page */
@@ -423,9 +421,9 @@ CATCH
             H5E_THROW(H5E_CANTMARKDIRTY, "unable to mark fixed array header as modified")
 
     /* Release resources */
-    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, dblock_cache_flags) < 0)
+    if(dblock && H5FA__dblock_unprotect(dblock, dblock_cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
-    if(dblk_page && H5FA__dblk_page_unprotect(dblk_page, dxpl_id, dblk_page_cache_flags) < 0)
+    if(dblk_page && H5FA__dblk_page_unprotect(dblk_page, dblk_page_cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block page")
 
 END_FUNC(PRIV)  /* end H5FA_set() */
@@ -445,7 +443,7 @@ END_FUNC(PRIV)  /* end H5FA_set() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA_get(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, void *elmt))
+H5FA_get(const H5FA_t *fa, hsize_t idx, void *elmt))
 
     /* Local variables */
     H5FA_hdr_t *hdr = fa->hdr;          /* Header for FA */
@@ -470,7 +468,7 @@ H5FA_get(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, void *elmt))
     else {
         /* Get the data block */
         HDassert(H5F_addr_defined(hdr->dblk_addr));
-        if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, hdr->dblk_addr, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (dblock = H5FA__dblock_protect(hdr, hdr->dblk_addr, H5AC__READ_ONLY_FLAG)))
             H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)hdr->dblk_addr)
 
         /* Check for paged data block */
@@ -510,7 +508,7 @@ H5FA_get(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, void *elmt))
                     dblk_page_nelmts = dblock->dblk_page_nelmts;
 
                 /* Protect the data block page */
-                if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts, H5AC__READ_ONLY_FLAG)))
+                if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dblk_page_addr, dblk_page_nelmts, H5AC__READ_ONLY_FLAG)))
                     H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
                 /* Retrieve element from data block */
@@ -520,9 +518,9 @@ H5FA_get(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, void *elmt))
     } /* end else */
 
 CATCH
-    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(dblock && H5FA__dblock_unprotect(dblock, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
-    if(dblk_page && H5FA__dblk_page_unprotect(dblk_page, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(dblk_page && H5FA__dblk_page_unprotect(dblk_page, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block page")
 
 END_FUNC(PRIV)  /* end H5FA_get() */
@@ -542,7 +540,7 @@ END_FUNC(PRIV)  /* end H5FA_get() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA_close(H5FA_t *fa, hid_t dxpl_id))
+H5FA_close(H5FA_t *fa))
 
     /* Local variables */
     hbool_t pending_delete = FALSE;     /* Whether the array is pending deletion */
@@ -593,7 +591,7 @@ H5FA_close(H5FA_t *fa, hid_t dxpl_id))
 
             /* Lock the array header into memory */
             /* (OK to pass in NULL for callback context, since we know the header must be in the cache) */
-            if(NULL == (hdr = H5FA__hdr_protect(fa->f, dxpl_id, fa_addr, NULL, H5AC__NO_FLAGS_SET)))
+            if(NULL == (hdr = H5FA__hdr_protect(fa->f, fa_addr, NULL, H5AC__NO_FLAGS_SET)))
                 H5E_THROW(H5E_CANTLOAD, "unable to load fixed array header")
 
             /* Set the shared array header's file context for this operation */
@@ -607,7 +605,7 @@ H5FA_close(H5FA_t *fa, hid_t dxpl_id))
                 H5E_THROW(H5E_CANTDEC, "can't decrement reference count on shared array header")
 
             /* Delete array, starting with header (unprotects header) */
-            if(H5FA__hdr_delete(hdr, dxpl_id) < 0)
+            if(H5FA__hdr_delete(hdr) < 0)
                 H5E_THROW(H5E_CANTDELETE, "unable to delete fixed array")
         } /* end if */
         else {
@@ -642,7 +640,7 @@ END_FUNC(PRIV)  /* end H5FA_close() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA_delete(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata))
+H5FA_delete(H5F_t *f, haddr_t fa_addr, void *ctx_udata))
 
     /* Local variables */
     H5FA_hdr_t *hdr = NULL;             /* The fixed array header information */
@@ -654,7 +652,7 @@ H5FA_delete(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata))
     HDassert(H5F_addr_defined(fa_addr));
 
     /* Lock the array header into memory */
-    if(NULL == (hdr = H5FA__hdr_protect(f, dxpl_id, fa_addr, ctx_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (hdr = H5FA__hdr_protect(f, fa_addr, ctx_udata, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array header, address = %llu", (unsigned long long)fa_addr)
 
     /* Check for files using shared array header */
@@ -665,7 +663,7 @@ H5FA_delete(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata))
         hdr->f = f;
 
         /* Delete array now, starting with header (unprotects header) */
-        if(H5FA__hdr_delete(hdr, dxpl_id) < 0)
+        if(H5FA__hdr_delete(hdr) < 0)
             H5E_THROW(H5E_CANTDELETE, "unable to delete fixed array")
         hdr = NULL;
     } /* end if */
@@ -673,7 +671,7 @@ H5FA_delete(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata))
 CATCH
 
     /* Unprotect the header, if an error occurred */
-    if(hdr && H5FA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5FA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
 
 END_FUNC(PRIV)  /* end H5FA_delete() */
@@ -696,7 +694,7 @@ END_FUNC(PRIV)  /* end H5FA_delete() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA_iterate(H5FA_t *fa, hid_t dxpl_id, H5FA_operator_t op, void *udata))
+H5FA_iterate(H5FA_t *fa, H5FA_operator_t op, void *udata))
 
     /* Local variables */
     uint8_t     *elmt = NULL;
@@ -718,7 +716,7 @@ H5FA_iterate(H5FA_t *fa, hid_t dxpl_id, H5FA_operator_t op, void *udata))
         int cb_ret;     /* Return value from callback */
 
         /* Get array element */
-        if(H5FA_get(fa, dxpl_id, u, elmt) < 0)
+        if(H5FA_get(fa, u, elmt) < 0)
             H5E_THROW(H5E_CANTGET, "unable to delete fixed array")
 
         /* Make callback */
@@ -751,7 +749,7 @@ END_FUNC(PRIV)  /* end H5FA_iterate() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA_depend(H5FA_t *fa, hid_t dxpl_id, H5AC_proxy_entry_t *parent))
+H5FA_depend(H5FA_t *fa, H5AC_proxy_entry_t *parent))
 
     /* Local variables */
     H5FA_hdr_t *hdr = fa->hdr;          /* Header for FA */
@@ -776,7 +774,7 @@ H5FA_depend(H5FA_t *fa, hid_t dxpl_id, H5AC_proxy_entry_t *parent))
         hdr->f = fa->f;
 
         /* Add the fixed array as a child of the parent (proxy) */
-        if(H5AC_proxy_entry_add_child(parent, hdr->f, dxpl_id, hdr->top_proxy) < 0)
+        if(H5AC_proxy_entry_add_child(parent, hdr->f, hdr->top_proxy) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add fixed array as child of proxy")
         hdr->parent = parent;
     } /* end if */
diff --git a/src/H5FAcache.c b/src/H5FAcache.c
index 40117a7..1f199e9 100644
--- a/src/H5FAcache.c
+++ b/src/H5FAcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -90,7 +88,7 @@ static herr_t H5FA__cache_dblock_serialize(const H5F_t *f, void *image, size_t l
     void *thing);
 static herr_t H5FA__cache_dblock_notify(H5AC_notify_action_t action, void *thing);
 static herr_t H5FA__cache_dblock_free_icr(void *thing);
-static herr_t H5FA__cache_dblock_fsf_size(const void *thing, size_t *fsf_size);
+static herr_t H5FA__cache_dblock_fsf_size(const void *thing, hsize_t *fsf_size);
 
 static herr_t H5FA__cache_dblk_page_get_initial_load_size(void *udata, size_t *image_len);
 static htri_t H5FA__cache_dblk_page_verify_chksum(const void *image_ptr, size_t len, void *udata_ptr);
@@ -977,7 +975,7 @@ END_FUNC(STATIC)   /* end H5FA__cache_dblock_free_icr() */
  */
 BEGIN_FUNC(STATIC, NOERR,
 herr_t, SUCCEED, -,
-H5FA__cache_dblock_fsf_size(const void *_thing, size_t *fsf_size))
+H5FA__cache_dblock_fsf_size(const void *_thing, hsize_t *fsf_size))
 
     const H5FA_dblock_t *dblock = (const H5FA_dblock_t *)_thing;    /* Pointer to the object */
 
diff --git a/src/H5FAdbg.c b/src/H5FAdbg.c
index 2dc51c5..b578cf2 100644
--- a/src/H5FAdbg.c
+++ b/src/H5FAdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -93,7 +91,7 @@
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+H5FA__hdr_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
     int fwidth, const H5FA_class_t *cls, haddr_t obj_addr))
 
     /* Local variables */
@@ -110,14 +108,13 @@ H5FA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(cls);
 
     /* Check for debugging context callback available */
-    if(cls->crt_dbg_ctx) {
+    if(cls->crt_dbg_ctx)
         /* Create debugging context */
-        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, dxpl_id, obj_addr)))
+        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, obj_addr)))
             H5E_THROW(H5E_CANTGET, "unable to create fixed array debugging context")
-    } /* end if */
 
     /* Load the fixed array header */
-    if(NULL == (hdr = H5FA__hdr_protect(f, dxpl_id, addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5FA__hdr_protect(f, addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to load fixed array header")
 
     /* Print opening message */
@@ -150,7 +147,7 @@ H5FA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
 CATCH
     if(dbg_ctx && cls->dst_dbg_ctx(dbg_ctx) < 0)
         H5E_THROW(H5E_CANTRELEASE, "unable to release fixed array debugging context")
-    if(hdr && H5FA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5FA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
 
 END_FUNC(PKG)   /* end H5FA__hdr_debug() */
@@ -171,7 +168,7 @@ END_FUNC(PKG)   /* end H5FA__hdr_debug() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+H5FA__dblock_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
     int fwidth, const H5FA_class_t *cls, haddr_t hdr_addr, haddr_t obj_addr))
 
     /* Local variables */
@@ -191,18 +188,17 @@ H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
     HDassert(H5F_addr_defined(obj_addr));
 
     /* Check for debugging context callback available */
-    if(cls->crt_dbg_ctx) {
+    if(cls->crt_dbg_ctx)
         /* Create debugging context */
-        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, dxpl_id, obj_addr)))
+        if(NULL == (dbg_ctx = cls->crt_dbg_ctx(f, obj_addr)))
             H5E_THROW(H5E_CANTGET, "unable to create fixed array debugging context")
-    } /* end if */
 
     /* Load the fixed array header */
-    if(NULL == (hdr = H5FA__hdr_protect(f, dxpl_id, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5FA__hdr_protect(f, hdr_addr, dbg_ctx, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to load fixed array header")
 
     /* Protect data block */
-    if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (dblock = H5FA__dblock_protect(hdr, addr, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)addr)
 
     /* Print opening message */
@@ -246,7 +242,7 @@ H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
                 if(((page_idx + 1) == dblock->npages) && (nelmts_left = hdr->cparam.nelmts % dblock->dblk_page_nelmts))
                     dblk_page_nelmts = (size_t)nelmts_left;
 
-		if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dxpl_id, dblk_page_addr, dblk_page_nelmts, H5AC__READ_ONLY_FLAG)))
+		if(NULL == (dblk_page = H5FA__dblk_page_protect(hdr, dblk_page_addr, dblk_page_nelmts, H5AC__READ_ONLY_FLAG)))
 		    H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
                 HDfprintf(stream, "%*sElements in page %Zu:\n", indent, "", page_idx);
@@ -255,7 +251,7 @@ H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
                     if((hdr->cparam.cls->debug)(stream, (indent + 3), MAX(0, (fwidth - 3)), (hsize_t)u, ((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * u)) < 0)
                         H5E_THROW(H5E_CANTGET, "can't get element for debugging")
                 } /* end for */
-                if(H5FA__dblk_page_unprotect(dblk_page, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+                if(H5FA__dblk_page_unprotect(dblk_page, H5AC__NO_FLAGS_SET) < 0)
                     H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block page")
 
                 /* Advance to next page address */
@@ -276,9 +272,9 @@ H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int inde
 CATCH
     if(dbg_ctx && cls->dst_dbg_ctx(dbg_ctx) < 0)
         H5E_THROW(H5E_CANTRELEASE, "unable to release fixed array debugging context")
-    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(dblock && H5FA__dblock_unprotect(dblock, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
-    if(hdr && H5FA__hdr_unprotect(hdr, dxpl_id, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5FA__hdr_unprotect(hdr, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
 
 END_FUNC(PKG)   /* end H5FA__dblock_debug() */
diff --git a/src/H5FAdblkpage.c b/src/H5FAdblkpage.c
index 09278f8..effdeb2 100644
--- a/src/H5FAdblkpage.c
+++ b/src/H5FAdblkpage.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -149,7 +147,7 @@ END_FUNC(PKG)   /* end H5FA__dblk_page_alloc() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__dblk_page_create(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t addr, size_t nelmts))
+H5FA__dblk_page_create(H5FA_hdr_t *hdr, haddr_t addr, size_t nelmts))
 
     /* Local variables */
     H5FA_dblk_page_t *dblk_page = NULL; /* Fixed array data block page */
@@ -178,13 +176,13 @@ HDfprintf(stderr, "%s: dblk_page->size = %Zu\n", FUNC, dblk_page->size);
         H5E_THROW(H5E_CANTSET, "can't set fixed array data block page elements to class's fill value")
 
     /* Cache the new fixed array data block page */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTINSERT, "can't add fixed array data block page to cache")
     inserted = TRUE;
 
     /* Add data block page as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblk_page) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblk_page) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add fixed array entry as child of array proxy")
         dblk_page->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -220,7 +218,7 @@ END_FUNC(PKG)   /* end H5FA__dblk_page_create() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5FA_dblk_page_t *, NULL, NULL,
-H5FA__dblk_page_protect(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_page_addr,
+H5FA__dblk_page_protect(H5FA_hdr_t *hdr, haddr_t dblk_page_addr,
     size_t dblk_page_nelmts, unsigned flags))
 
     /* Local variables */
@@ -244,13 +242,13 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     udata.dblk_page_addr = dblk_page_addr;
 
     /* Protect the data block page */
-    if(NULL == (dblk_page = (H5FA_dblk_page_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page_addr, &udata, flags)))
+    if(NULL == (dblk_page = (H5FA_dblk_page_t *)H5AC_protect(hdr->f, H5AC_FARRAY_DBLK_PAGE, dblk_page_addr, &udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == dblk_page->top_proxy) {
         /* Add data block page as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblk_page) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblk_page) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add fixed array entry as child of array proxy")
         dblk_page->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -263,7 +261,7 @@ CATCH
     /* Clean up on error */
     if(!ret_value) {
         /* Release the data block page, if it was protected */
-        if(dblk_page && H5AC_unprotect(hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
+        if(dblk_page && H5AC_unprotect(hdr->f, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, H5AC__NO_FLAGS_SET) < 0)
             H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect fixed array data block page, address = %llu", (unsigned long long)dblk_page->addr)
     } /* end if */
 
@@ -285,8 +283,7 @@ END_FUNC(PKG)   /* end H5FA__dblk_page_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__dblk_page_unprotect(H5FA_dblk_page_t *dblk_page, hid_t dxpl_id,
-    unsigned cache_flags))
+H5FA__dblk_page_unprotect(H5FA_dblk_page_t *dblk_page, unsigned cache_flags))
 
     /* Local variables */
 
@@ -298,7 +295,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     HDassert(dblk_page);
 
     /* Unprotect the data block page */
-    if(H5AC_unprotect(dblk_page->hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, cache_flags) < 0)
+    if(H5AC_unprotect(dblk_page->hdr->f, H5AC_FARRAY_DBLK_PAGE, dblk_page->addr, dblk_page, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect fixed array data block page, address = %llu", (unsigned long long)dblk_page->addr)
 
 CATCH
diff --git a/src/H5FAdblock.c b/src/H5FAdblock.c
index 440447d..a6a8ced 100644
--- a/src/H5FAdblock.c
+++ b/src/H5FAdblock.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -186,7 +184,7 @@ END_FUNC(PKG)   /* end H5FA__dblock_alloc() */
  */
 BEGIN_FUNC(PKG, ERR,
 haddr_t, HADDR_UNDEF, HADDR_UNDEF,
-H5FA__dblock_create(H5FA_hdr_t *hdr, hid_t dxpl_id, hbool_t *hdr_dirty))
+H5FA__dblock_create(H5FA_hdr_t *hdr, hbool_t *hdr_dirty))
 
     /* Local variables */
     H5FA_dblock_t *dblock = NULL;       /* Fixed array data block */
@@ -205,7 +203,7 @@ H5FA__dblock_create(H5FA_hdr_t *hdr, hid_t dxpl_id, hbool_t *hdr_dirty))
     hdr->stats.dblk_size = dblock->size = H5FA_DBLOCK_SIZE(dblock);
 
     /* Allocate space for the data block on disk */
-    if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_FARRAY_DBLOCK, dxpl_id, (hsize_t)dblock->size)))
+    if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_FARRAY_DBLOCK, (hsize_t)dblock->size)))
         H5E_THROW(H5E_CANTALLOC, "file allocation failed for fixed array data block")
     dblock->addr = dblock_addr;
 
@@ -216,13 +214,13 @@ H5FA__dblock_create(H5FA_hdr_t *hdr, hid_t dxpl_id, hbool_t *hdr_dirty))
             H5E_THROW(H5E_CANTSET, "can't set fixed array data block elements to class's fill value")
 
     /* Cache the new fixed array data block */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_FARRAY_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_FARRAY_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTINSERT, "can't add fixed array data block to cache")
     inserted = TRUE;
 
     /* Add data block as child of 'top' proxy */
     if(hdr->top_proxy) {
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add fixed array entry as child of array proxy")
         dblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -243,7 +241,7 @@ CATCH
                     H5E_THROW(H5E_CANTREMOVE, "unable to remove fixed array data block from cache")
 
             /* Release data block's disk space */
-            if(H5F_addr_defined(dblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_FARRAY_DBLOCK, dxpl_id, dblock->addr, (hsize_t)dblock->size) < 0)
+            if(H5F_addr_defined(dblock->addr) && H5MF_xfree(hdr->f, H5FD_MEM_FARRAY_DBLOCK, dblock->addr, (hsize_t)dblock->size) < 0)
                 H5E_THROW(H5E_CANTFREE, "unable to release fixed array data block")
 
             /* Destroy data block */
@@ -268,8 +266,7 @@ END_FUNC(PKG)   /* end H5FA__dblock_create() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5FA_dblock_t *, NULL, NULL,
-H5FA__dblock_protect(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr,
-    unsigned flags))
+H5FA__dblock_protect(H5FA_hdr_t *hdr, haddr_t dblk_addr, unsigned flags))
 
     /* Local variables */
     H5FA_dblock_t *dblock;              /* Fixed array data block */
@@ -287,13 +284,13 @@ H5FA__dblock_protect(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr,
     udata.dblk_addr = dblk_addr;
 
     /* Protect the data block */
-    if(NULL == (dblock = (H5FA_dblock_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_FARRAY_DBLOCK, dblk_addr, &udata, flags)))
+    if(NULL == (dblock = (H5FA_dblock_t *)H5AC_protect(hdr->f, H5AC_FARRAY_DBLOCK, dblk_addr, &udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)dblk_addr)
 
     /* Create top proxy, if it doesn't exist */
     if(hdr->top_proxy && NULL == dblock->top_proxy) {
         /* Add data block as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dxpl_id, dblock) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, hdr->f, dblock) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add fixed array entry as child of array proxy")
         dblock->top_proxy = hdr->top_proxy;
     } /* end if */
@@ -306,7 +303,7 @@ CATCH
     /* Clean up on error */
     if(!ret_value)
         /* Release the data block, if it was protected */
-        if(dblock && H5AC_unprotect(hdr->f, dxpl_id, H5AC_FARRAY_DBLOCK, dblock->addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+        if(dblock && H5AC_unprotect(hdr->f, H5AC_FARRAY_DBLOCK, dblock->addr, dblock, H5AC__NO_FLAGS_SET) < 0)
             H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect fixed array data block, address = %llu", (unsigned long long)dblock->addr)
 
 END_FUNC(PKG)   /* end H5FA__dblock_protect() */
@@ -326,7 +323,7 @@ END_FUNC(PKG)   /* end H5FA__dblock_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__dblock_unprotect(H5FA_dblock_t *dblock, hid_t dxpl_id, unsigned cache_flags))
+H5FA__dblock_unprotect(H5FA_dblock_t *dblock, unsigned cache_flags))
 
     /* Local variables */
 
@@ -334,7 +331,7 @@ H5FA__dblock_unprotect(H5FA_dblock_t *dblock, hid_t dxpl_id, unsigned cache_flag
     HDassert(dblock);
 
     /* Unprotect the data block */
-    if(H5AC_unprotect(dblock->hdr->f, dxpl_id, H5AC_FARRAY_DBLOCK, dblock->addr, dblock, cache_flags) < 0)
+    if(H5AC_unprotect(dblock->hdr->f, H5AC_FARRAY_DBLOCK, dblock->addr, dblock, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect fixed array data block, address = %llu", (unsigned long long)dblock->addr)
 
 CATCH
@@ -356,7 +353,7 @@ END_FUNC(PKG)   /* end H5FA__dblock_unprotect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__dblock_delete(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr))
+H5FA__dblock_delete(H5FA_hdr_t *hdr, haddr_t dblk_addr))
 
     /* Local variables */
     H5FA_dblock_t *dblock = NULL;       /* Pointer to data block */
@@ -366,7 +363,7 @@ H5FA__dblock_delete(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr))
     HDassert(H5F_addr_defined(dblk_addr));
 
     /* Protect data block */
-    if(NULL == (dblock = H5FA__dblock_protect(hdr, dxpl_id, dblk_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (dblock = H5FA__dblock_protect(hdr, dblk_addr, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block, address = %llu", (unsigned long long)dblk_addr)
 
     /* Check if data block is paged */
@@ -381,7 +378,7 @@ H5FA__dblock_delete(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr))
         for(u = 0; u < dblock->npages; u++) {
             /* Evict the data block page from the metadata cache */
             /* (OK to call if it doesn't exist in the cache) */
-            if(H5AC_expunge_entry(hdr->f, dxpl_id, H5AC_FARRAY_DBLK_PAGE, dblk_page_addr, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_expunge_entry(hdr->f, H5AC_FARRAY_DBLK_PAGE, dblk_page_addr, H5AC__NO_FLAGS_SET) < 0)
                 H5E_THROW(H5E_CANTEXPUNGE, "unable to remove array data block page from metadata cache")
 
             /* Advance to next page address */
@@ -392,7 +389,7 @@ H5FA__dblock_delete(H5FA_hdr_t *hdr, hid_t dxpl_id, haddr_t dblk_addr))
 CATCH
 
     /* Finished deleting data block in metadata cache */
-    if(dblock && H5FA__dblock_unprotect(dblock, dxpl_id, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+    if(dblock && H5FA__dblock_unprotect(dblock, H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array data block")
 
 END_FUNC(PKG)   /* end H5FA__dblock_delete() */
diff --git a/src/H5FAhdr.c b/src/H5FAhdr.c
index 52b90d1..2e3db0b 100644
--- a/src/H5FAhdr.c
+++ b/src/H5FAhdr.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -180,8 +178,7 @@ END_FUNC(PKG)   /* end H5FA__hdr_init() */
  */
 BEGIN_FUNC(PKG, ERR,
 haddr_t, HADDR_UNDEF, HADDR_UNDEF,
-H5FA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam,
-    void *ctx_udata))
+H5FA__hdr_create(H5F_t *f, const H5FA_create_t *cparam, void *ctx_udata))
 
     /* Local variables */
     H5FA_hdr_t *hdr = NULL;     /* Fixed array header */
@@ -217,7 +214,7 @@ H5FA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam,
         H5E_THROW(H5E_CANTINIT, "initialization failed for fixed array header")
 
     /* Allocate space for the header on disk */
-    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_FARRAY_HDR, dxpl_id, (hsize_t)hdr->size)))
+    if(HADDR_UNDEF == (hdr->addr = H5MF_alloc(f, H5FD_MEM_FARRAY_HDR, (hsize_t)hdr->size)))
         H5E_THROW(H5E_CANTALLOC, "file allocation failed for Fixed Array header")
 
     /* Create 'top' proxy for extensible array entries */
@@ -226,13 +223,13 @@ H5FA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam,
             H5E_THROW(H5E_CANTCREATE, "can't create fixed array entry proxy")
 
     /* Cache the new Fixed Array header */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_FARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_FARRAY_HDR, hdr->addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         H5E_THROW(H5E_CANTINSERT, "can't add fixed array header to cache")
     inserted = TRUE;
 
     /* Add header as child of 'top' proxy */
     if(hdr->top_proxy)
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, dxpl_id, hdr) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, hdr) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add fixed array entry as child of array proxy")
 
     /* Set address of array header to return */
@@ -248,7 +245,7 @@ CATCH
                     H5E_THROW(H5E_CANTREMOVE, "unable to remove fixed array header from cache")
 
             /* Release header's disk space */
-            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_FARRAY_HDR, dxpl_id, hdr->addr, (hsize_t)hdr->size) < 0)
+            if(H5F_addr_defined(hdr->addr) && H5MF_xfree(f, H5FD_MEM_FARRAY_HDR, hdr->addr, (hsize_t)hdr->size) < 0)
                 H5E_THROW(H5E_CANTFREE, "unable to free Fixed Array header")
 
             /* Destroy header */
@@ -423,8 +420,7 @@ END_FUNC(PKG)   /* end H5FA__hdr_modified() */
  */
 BEGIN_FUNC(PKG, ERR,
 H5FA_hdr_t *, NULL, NULL,
-H5FA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata,
-    unsigned flags))
+H5FA__hdr_protect(H5F_t *f, haddr_t fa_addr, void *ctx_udata, unsigned flags))
 
     /* Local variables */
     H5FA_hdr_t *hdr;            /* Fixed array header */
@@ -443,7 +439,7 @@ H5FA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata,
     udata.ctx_udata = ctx_udata;
 
     /* Protect the header */
-    if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_FARRAY_HDR, fa_addr, &udata, flags)))
+    if(NULL == (hdr = (H5FA_hdr_t *)H5AC_protect(f, H5AC_FARRAY_HDR, fa_addr, &udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array header, address = %llu", (unsigned long long)fa_addr)
     hdr->f = f;   /* (Must be set again here, in case the header was already in the cache -QAK) */
 
@@ -454,7 +450,7 @@ H5FA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata,
             H5E_THROW(H5E_CANTCREATE, "can't create fixed array entry proxy")
 
         /* Add header as child of 'top' proxy */
-        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, dxpl_id, hdr) < 0)
+        if(H5AC_proxy_entry_add_child(hdr->top_proxy, f, hdr) < 0)
             H5E_THROW(H5E_CANTSET, "unable to add fixed array entry as child of array proxy")
     } /* end if */
 
@@ -481,7 +477,7 @@ END_FUNC(PKG)   /* end H5FA__hdr_protect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__hdr_unprotect(H5FA_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags))
+H5FA__hdr_unprotect(H5FA_hdr_t *hdr, unsigned cache_flags))
 
     /* Local variables */
 
@@ -489,7 +485,7 @@ H5FA__hdr_unprotect(H5FA_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags))
     HDassert(hdr);
 
     /* Unprotect the header */
-    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_FARRAY_HDR, hdr->addr, hdr, cache_flags) < 0)
+    if(H5AC_unprotect(hdr->f, H5AC_FARRAY_HDR, hdr->addr, hdr, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to unprotect fixed array hdr, address = %llu", (unsigned long long)hdr->addr)
 
 CATCH
@@ -511,7 +507,7 @@ END_FUNC(PKG)   /* end H5EA__hdr_unprotect() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5FA__hdr_delete(H5FA_hdr_t *hdr, hid_t dxpl_id))
+H5FA__hdr_delete(H5FA_hdr_t *hdr))
 
     /* Local variables */
     unsigned cache_flags = H5AC__NO_FLAGS_SET;  /* Flags for unprotecting header */
@@ -537,7 +533,7 @@ H5FA__hdr_delete(H5FA_hdr_t *hdr, hid_t dxpl_id))
     /* Check for Fixed Array Data block */
     if(H5F_addr_defined(hdr->dblk_addr)) {
         /* Delete Fixed Array Data block */
-        if(H5FA__dblock_delete(hdr, dxpl_id, hdr->dblk_addr) < 0)
+        if(H5FA__dblock_delete(hdr, hdr->dblk_addr) < 0)
             H5E_THROW(H5E_CANTDELETE, "unable to delete fixed array data block")
     } /* end if */
 
@@ -547,7 +543,7 @@ H5FA__hdr_delete(H5FA_hdr_t *hdr, hid_t dxpl_id))
 CATCH
 
     /* Unprotect the header, deleting it if an error hasn't occurred */
-    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_FARRAY_HDR, hdr->addr, hdr, cache_flags) < 0)
+    if(H5AC_unprotect(hdr->f, H5AC_FARRAY_HDR, hdr->addr, hdr, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release fixed array header")
 
 END_FUNC(PKG)   /* end H5FA__hdr_delete() */
diff --git a/src/H5FAint.c b/src/H5FAint.c
index 331227b..9d3bce8 100644
--- a/src/H5FAint.c
+++ b/src/H5FAint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5FAmodule.h b/src/H5FAmodule.h
index e46b071..f675faf 100644
--- a/src/H5FAmodule.h
+++ b/src/H5FAmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FApkg.h b/src/H5FApkg.h
index 63eacff..720c046 100644
--- a/src/H5FApkg.h
+++ b/src/H5FApkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -269,7 +267,7 @@ H5_DLL herr_t H5FA__destroy_flush_depend(H5AC_info_t *parent_entry,
 /* Header routines */
 H5_DLL H5FA_hdr_t *H5FA__hdr_alloc(H5F_t *f);
 H5_DLL herr_t H5FA__hdr_init(H5FA_hdr_t *hdr, void *ctx_udata);
-H5_DLL haddr_t H5FA__hdr_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam, void *ctx_udata);
+H5_DLL haddr_t H5FA__hdr_create(H5F_t *f, const H5FA_create_t *cparam, void *ctx_udata);
 H5_DLL void *H5FA__hdr_alloc_elmts(H5FA_hdr_t *hdr, size_t nelmts);
 H5_DLL herr_t H5FA__hdr_free_elmts(H5FA_hdr_t *hdr, size_t nelmts, void *elmts);
 H5_DLL herr_t H5FA__hdr_incr(H5FA_hdr_t *hdr);
@@ -277,40 +275,35 @@ H5_DLL herr_t H5FA__hdr_decr(H5FA_hdr_t *hdr);
 H5_DLL herr_t H5FA__hdr_fuse_incr(H5FA_hdr_t *hdr);
 H5_DLL size_t H5FA__hdr_fuse_decr(H5FA_hdr_t *hdr);
 H5_DLL herr_t H5FA__hdr_modified(H5FA_hdr_t *hdr);
-H5_DLL H5FA_hdr_t *H5FA__hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr,
-    void *ctx_udata, unsigned flags);
-H5_DLL herr_t H5FA__hdr_unprotect(H5FA_hdr_t *hdr, hid_t dxpl_id, unsigned cache_flags);
-H5_DLL herr_t H5FA__hdr_delete(H5FA_hdr_t *hdr, hid_t dxpl_id);
+H5_DLL H5FA_hdr_t *H5FA__hdr_protect(H5F_t *f, haddr_t fa_addr, void *ctx_udata,
+    unsigned flags);
+H5_DLL herr_t H5FA__hdr_unprotect(H5FA_hdr_t *hdr, unsigned cache_flags);
+H5_DLL herr_t H5FA__hdr_delete(H5FA_hdr_t *hdr);
 H5_DLL herr_t H5FA__hdr_dest(H5FA_hdr_t *hdr);
 
 /* Data block routines */
 H5_DLL H5FA_dblock_t *H5FA__dblock_alloc(H5FA_hdr_t *hdr);
-H5_DLL haddr_t H5FA__dblock_create(H5FA_hdr_t *hdr, hid_t dxpl_id, hbool_t *hdr_dirty);
+H5_DLL haddr_t H5FA__dblock_create(H5FA_hdr_t *hdr, hbool_t *hdr_dirty);
 H5_DLL unsigned H5FA__dblock_sblk_idx(const H5FA_hdr_t *hdr, hsize_t idx);
-H5_DLL H5FA_dblock_t *H5FA__dblock_protect(H5FA_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t dblk_addr, unsigned flags);
-H5_DLL herr_t H5FA__dblock_unprotect(H5FA_dblock_t *dblock, hid_t dxpl_id,
-    unsigned cache_flags);
-H5_DLL herr_t H5FA__dblock_delete(H5FA_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t dblk_addr);
+H5_DLL H5FA_dblock_t *H5FA__dblock_protect(H5FA_hdr_t *hdr, haddr_t dblk_addr,
+    unsigned flags);
+H5_DLL herr_t H5FA__dblock_unprotect(H5FA_dblock_t *dblock, unsigned cache_flags);
+H5_DLL herr_t H5FA__dblock_delete(H5FA_hdr_t *hdr, haddr_t dblk_addr);
 H5_DLL herr_t H5FA__dblock_dest(H5FA_dblock_t *dblock);
 
 /* Data block page routines */
-H5_DLL herr_t H5FA__dblk_page_create(H5FA_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t addr, size_t nelmts);
+H5_DLL herr_t H5FA__dblk_page_create(H5FA_hdr_t *hdr, haddr_t addr, size_t nelmts);
 H5_DLL H5FA_dblk_page_t *H5FA__dblk_page_alloc(H5FA_hdr_t *hdr, size_t nelmts);
-H5_DLL H5FA_dblk_page_t *H5FA__dblk_page_protect(H5FA_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t dblk_page_addr, size_t dblk_page_nelmts, unsigned flags);
-H5_DLL herr_t H5FA__dblk_page_unprotect(H5FA_dblk_page_t *dblk_page,
-    hid_t dxpl_id, unsigned cache_flags);
+H5_DLL H5FA_dblk_page_t *H5FA__dblk_page_protect(H5FA_hdr_t *hdr, haddr_t dblk_page_addr,
+    size_t dblk_page_nelmts, unsigned flags);
+H5_DLL herr_t H5FA__dblk_page_unprotect(H5FA_dblk_page_t *dblk_page, unsigned cache_flags);
 H5_DLL herr_t H5FA__dblk_page_dest(H5FA_dblk_page_t *dblk_page);
 
 /* Debugging routines for dumping file structures */
-H5_DLL herr_t H5FA__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth, const H5FA_class_t *cls, haddr_t obj_addr);
-H5_DLL herr_t H5FA__dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth, const H5FA_class_t *cls,
-    haddr_t hdr_addr, haddr_t obj_addr);
+H5_DLL herr_t H5FA__hdr_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth, const H5FA_class_t *cls, haddr_t obj_addr);
+H5_DLL herr_t H5FA__dblock_debug(H5F_t *f, haddr_t addr, FILE *stream,
+    int indent, int fwidth, const H5FA_class_t *cls, haddr_t hdr_addr, haddr_t obj_addr);
 
 /* Testing routines */
 #ifdef H5FA_TESTING
diff --git a/src/H5FAprivate.h b/src/H5FAprivate.h
index 612f3a2..98a9af4 100644
--- a/src/H5FAprivate.h
+++ b/src/H5FAprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -72,7 +70,7 @@ typedef struct H5FA_class_t {
     herr_t (*encode)(void *raw, const void *elmt, size_t nelmts, void *ctx);   /* Encode elements from native form to disk storage form */
     herr_t (*decode)(const void *raw, void *elmt, size_t nelmts, void *ctx);   /* Decode elements from disk storage form to native form */
     herr_t (*debug)(FILE *stream, int indent, int fwidth, hsize_t idx, const void *elmt); /* Print an element for debugging */
-    void *(*crt_dbg_ctx)(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr); /* Create debugging context */
+    void *(*crt_dbg_ctx)(H5F_t *f, haddr_t obj_addr); /* Create debugging context */
     herr_t (*dst_dbg_ctx)(void *dbg_ctx);       /* Destroy debugging context */
 } H5FA_class_t;
 
@@ -120,17 +118,17 @@ H5_DLLVAR const H5FA_class_t H5FA_CLS_FILT_CHUNK[1];
 /***************************************/
 
 /* General routines */
-H5_DLL H5FA_t *H5FA_create(H5F_t *f, hid_t dxpl_id, const H5FA_create_t *cparam,
+H5_DLL H5FA_t *H5FA_create(H5F_t *f, const H5FA_create_t *cparam,
     void *ctx_udata);
-H5_DLL H5FA_t *H5FA_open(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata);
+H5_DLL H5FA_t *H5FA_open(H5F_t *f, haddr_t fa_addr, void *ctx_udata);
 H5_DLL herr_t H5FA_get_nelmts(const H5FA_t *fa, hsize_t *nelmts);
 H5_DLL herr_t H5FA_get_addr(const H5FA_t *fa, haddr_t *addr);
-H5_DLL herr_t H5FA_set(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, const void *elmt);
-H5_DLL herr_t H5FA_get(const H5FA_t *fa, hid_t dxpl_id, hsize_t idx, void *elmt);
-H5_DLL herr_t H5FA_depend(H5FA_t *fa, hid_t dxpl_id, H5AC_proxy_entry_t *parent);
-H5_DLL herr_t H5FA_iterate(H5FA_t *fa, hid_t dxpl_id, H5FA_operator_t op, void *udata);
-H5_DLL herr_t H5FA_close(H5FA_t *fa, hid_t dxpl_id);
-H5_DLL herr_t H5FA_delete(H5F_t *f, hid_t dxpl_id, haddr_t fa_addr, void *ctx_udata);
+H5_DLL herr_t H5FA_set(const H5FA_t *fa, hsize_t idx, const void *elmt);
+H5_DLL herr_t H5FA_get(const H5FA_t *fa, hsize_t idx, void *elmt);
+H5_DLL herr_t H5FA_depend(H5FA_t *fa, H5AC_proxy_entry_t *parent);
+H5_DLL herr_t H5FA_iterate(H5FA_t *fa, H5FA_operator_t op, void *udata);
+H5_DLL herr_t H5FA_close(H5FA_t *fa);
+H5_DLL herr_t H5FA_delete(H5F_t *f, haddr_t fa_addr, void *ctx_udata);
 H5_DLL herr_t H5FA_patch_file(H5FA_t *fa, H5F_t *f);
 
 /* Statistics routines */
diff --git a/src/H5FAstat.c b/src/H5FAstat.c
index 72fa0de..3c06855 100644
--- a/src/H5FAstat.c
+++ b/src/H5FAstat.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5FAtest.c b/src/H5FAtest.c
index 091f284..4b03036 100644
--- a/src/H5FAtest.c
+++ b/src/H5FAtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -78,8 +76,7 @@ static herr_t H5FA__test_decode(const void *raw, void *elmt, size_t nelmts,
     void *ctx);
 static herr_t H5FA__test_debug(FILE *stream, int indent, int fwidth,
     hsize_t idx, const void *elmt);
-static void *H5FA__test_crt_dbg_context(H5F_t *f, hid_t dxpl_id,
-    haddr_t obj_addr);
+static void *H5FA__test_crt_dbg_context(H5F_t *f, haddr_t obj_addr);
 
 
 /*********************/
@@ -343,7 +340,7 @@ END_FUNC(STATIC)  /* end H5FA__test_debug() */
  */
 BEGIN_FUNC(STATIC, ERR,
 void *, NULL, NULL,
-H5FA__test_crt_dbg_context(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t H5_ATTR_UNUSED obj_addr))
+H5FA__test_crt_dbg_context(H5F_t H5_ATTR_UNUSED *f, haddr_t H5_ATTR_UNUSED obj_addr))
 
     /* Local variables */
     H5FA__test_ctx_t *ctx;              /* Context for callbacks */
diff --git a/src/H5FD.c b/src/H5FD.c
index 96d1230..d74ea31 100644
--- a/src/H5FD.c
+++ b/src/H5FD.c
@@ -5,23 +5,18 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
- * Programmer:  Robb Matzke <matzke@llnl.gov>
- *              Monday, July 26, 1999
- *
- * Purpose:	The Virtual File Layer as described in documentation.
- *              This is the greatest common denominator for all types of
- *              storage access whether a file, memory, network, etc. This
- *              layer usually just dispatches the request to an actual
- *              file driver layer.
+ * Purpose: The Virtual File Layer as described in documentation.
+ *          This is the greatest common denominator for all types of
+ *          storage access whether a file, memory, network, etc. This
+ *          layer usually just dispatches the request to an actual
+ *          file driver layer.
  */
 
 /****************/
@@ -36,6 +31,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"		/* Datasets				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"             /* File access				*/
@@ -64,7 +60,6 @@
 /********************/
 static herr_t H5FD_free_cls(H5FD_class_t *cls);
 static int H5FD_query(const H5FD_t *f, unsigned long *flags/*out*/);
-static int H5FD_driver_query(const H5FD_class_t *driver, unsigned long *flags/*out*/);
 
 /*********************/
 /* Package Variables */
@@ -115,9 +110,6 @@ static const H5I_class_t H5I_VFL_CLS[1] = {{
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -128,7 +120,7 @@ H5FD__init_package(void)
     FUNC_ENTER_PACKAGE
 
     if(H5I_register_type(H5I_VFL_CLS) < 0)
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "unable to initialize interface")
+        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "unable to initialize interface")
 
     /* Reset the file serial numbers */
     H5FD_file_serial_no_g = 0;
@@ -150,9 +142,6 @@ done:
  *				otherwise.
  *		Failure:        Never fails.
  *
- * Programmer:	Robb Matzke
- *              Friday, February 19, 1999
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -163,18 +152,18 @@ H5FD_term_package(void)
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
     if(H5_PKG_INIT_VAR) {
-	if(H5I_nmembers(H5I_VFL) > 0) {
-	    (void)H5I_clear_type(H5I_VFL, FALSE, FALSE);
+        if(H5I_nmembers(H5I_VFL) > 0) {
+            (void)H5I_clear_type(H5I_VFL, FALSE, FALSE);
             n++; /*H5I*/
-	} /* end if */
+        } /* end if */
         else {
-            /* Destroy the VFL driver id group */
-	    n += (H5I_dec_type_ref(H5I_VFL) > 0);
+            /* Destroy the VFL driver ID group */
+            n += (H5I_dec_type_ref(H5I_VFL) > 0);
 
-	    /* Mark closed */
+            /* Mark closed */
             if(0 == n)
                 H5_PKG_INIT_VAR = FALSE;
-	} /* end else */
+        } /* end else */
     } /* end if */
 
     FUNC_LEAVE_NOAPI(n)
@@ -192,11 +181,6 @@ H5FD_term_package(void)
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -224,26 +208,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FDregister
+ * Function:    H5FDregister
  *
- * Purpose:	Registers a new file driver as a member of the virtual file
- *		driver class.  Certain fields of the class struct are
- *		required and that is checked here so it doesn't have to be
- *		checked every time the field is accessed.
+ * Purpose:     Registers a new file driver as a member of the virtual file
+ *              driver class.  Certain fields of the class struct are
+ *              required and that is checked here so it doesn't have to be
+ *              checked every time the field is accessed.
  *
- * Return:	Success:	A file driver ID which is good until the
- *				library is closed or the driver is
- *				unregistered.
+ * Return:      Success:    A file driver ID which is good until the
+ *                          library is closed or the driver is
+ *                          unregistered.
  *
- *		Failure:	A negative value.
- *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
- *
- * Modifications:
- *              Copied guts of function into H5FD_register
- *              Quincey Koziol
- *              Friday, January 30, 2004
+ *              Failure:    A negative value.
  *
  *-------------------------------------------------------------------------
  */
@@ -258,21 +234,21 @@ H5FDregister(const H5FD_class_t *cls)
 
     /* Check arguments */
     if(!cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "null class pointer is disallowed")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "null class pointer is disallowed")
     if(!cls->open || !cls->close)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`open' and/or `close' methods are not defined")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`open' and/or `close' methods are not defined")
     if(!cls->get_eoa || !cls->set_eoa)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eoa' and/or `set_eoa' methods are not defined")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eoa' and/or `set_eoa' methods are not defined")
     if(!cls->get_eof)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eof' method is not defined")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`get_eof' method is not defined")
     if(!cls->read || !cls->write)
-	HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`read' and/or `write' method is not defined")
-    for (type=H5FD_MEM_DEFAULT; type<H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t,type))
-	if(cls->fl_map[type]<H5FD_MEM_NOLIST || cls->fl_map[type]>=H5FD_MEM_NTYPES)
-	    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid free-list mapping")
+        HGOTO_ERROR(H5E_ARGS, H5E_UNINITIALIZED, FAIL, "`read' and/or `write' method is not defined")
+    for (type = H5FD_MEM_DEFAULT; type < H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t,type))
+        if(cls->fl_map[type] < H5FD_MEM_NOLIST || cls->fl_map[type] >= H5FD_MEM_NTYPES)
+            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid free-list mapping")
 
     /* Create the new class ID */
-    if((ret_value=H5FD_register(cls, sizeof(H5FD_class_t), TRUE)) < 0)
+    if((ret_value = H5FD_register(cls, sizeof(H5FD_class_t), TRUE)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register file driver ID")
 
 done:
@@ -281,29 +257,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FD_register
- *
- * Purpose:	Registers a new file driver as a member of the virtual file
- *		driver class.  Certain fields of the class struct are
- *		required and that is checked here so it doesn't have to be
- *		checked every time the field is accessed.
+ * Function:    H5FD_register
  *
- * Return:	Success:	A file driver ID which is good until the
- *				library is closed or the driver is
- *				unregistered.
+ * Purpose:     Registers a new file driver as a member of the virtual file
+ *              driver class.  Certain fields of the class struct are
+ *              required and that is checked here so it doesn't have to be
+ *              checked every time the field is accessed.
  *
- *		Failure:	A negative value.
+ * Return:      Success:    A file driver ID which is good until the
+ *                          library is closed or the driver is
+ *                          unregistered.
  *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
- *
- * Modifications:
- *              Broke into public and internal routines & added 'size'
- *              parameter to internal routine, which allows us to create
- *              sub-classes of H5FD_class_t for internal support (see the
- *              MPI drivers, etc.)
- *              Quincey Koziol
- *              January 30, 2004
+ *              Failure:    A negative value.
  *
  *-------------------------------------------------------------------------
  */
@@ -328,7 +293,7 @@ H5FD_register(const void *_cls, size_t size, hbool_t app_ref)
 
     /* Copy the class structure so the caller can reuse or free it */
     if(NULL == (saved = (H5FD_class_t *)H5MM_malloc(size)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for file driver class struct")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for file driver class struct")
     HDmemcpy(saved, cls, size);
 
     /* Create the new class ID */
@@ -345,19 +310,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FDunregister
+ * Function:    H5FDunregister
  *
- * Purpose:	Removes a driver ID from the library. This in no way affects
- *		file access property lists which have been defined to use
- *		this driver or files which are already opened under this
- *		driver.
+ * Purpose:     Removes a driver ID from the library. This in no way affects
+ *              file access property lists which have been defined to use
+ *              this driver or files which are already opened under this
+ *              driver.
  *
- * Return:	Success:	Non-negative
+ * Return:      Success:    Non-negative
  *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *              Monday, July 26, 1999
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -397,9 +359,6 @@ done:
  *
  *		Failure:	NULL
  *
- * Programmer:	Robb Matzke
- *              Friday, August 20, 1999
- *
  *-------------------------------------------------------------------------
  */
 H5FD_class_t *
@@ -445,11 +404,6 @@ done:
  *		Failure:	0 if an error occurs or if the driver has no
  *				data to store in the superblock.
  *
- * Programmer:	Robb Matzke
- *              Monday, August 16, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 hsize_t
@@ -483,11 +437,6 @@ done:
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, August 16, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -514,9 +463,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Monday, August 16, 1999
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -545,9 +491,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Friday, July 19, 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -595,9 +538,6 @@ done:
  *		Failure:	NULL, including when the file has no
  *				properties.
  *
- * Programmer:	Robb Matzke
- *              Friday, August 13, 1999
- *
  *-------------------------------------------------------------------------
  */
 void *
@@ -625,9 +565,6 @@ done:
  * Return:	Success:	non-negative
  *		Failure:	negative
  *
- * Programmer:	Robb Matzke
- *              Tuesday, August  3, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -709,11 +646,6 @@ done:
  *
  *		Failure:	NULL
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 H5FD_t *
@@ -748,16 +680,6 @@ done:
  *
  *		Failure:	NULL
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
- * Modifications:
- *
- *		Raymond Lu
- * 		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
- *
  *-------------------------------------------------------------------------
  */
 H5FD_t *
@@ -792,7 +714,8 @@ H5FD_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr)
 	HGOTO_ERROR(H5E_VFL, H5E_UNSUPPORTED, NULL, "file driver has no `open' method")
 
     /* Query driver flag */
-    H5FD_driver_query(driver, &driver_flags);
+    if(H5FD_driver_query(driver, &driver_flags) < 0)
+        HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, NULL, "can't query VFD flags")
 
     /* Get initial file image info */
     if(H5P_peek(plist, H5F_ACS_FILE_IMAGE_INFO_NAME, &file_image_info) < 0)
@@ -863,9 +786,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -895,9 +815,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -946,11 +863,6 @@ done:
  *				comparison callback then the file pointers
  *				themselves are compared.
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -977,11 +889,6 @@ done:
  *
  *		Failure:	Must never fail.
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -1027,11 +934,6 @@ done:
  *
  *		Failure:	negative
  *
- * Programmer:	Quincey Koziol
- *              Friday, August 25, 2000
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 int
@@ -1061,9 +963,6 @@ done:
  *
  *		Failure:	negative
  *
- * Programmer:	Quincey Koziol
- *              Friday, August 25, 2000
- *
  *-------------------------------------------------------------------------
  */
 static int
@@ -1087,42 +986,6 @@ H5FD_query(const H5FD_t *f, unsigned long *flags/*out*/)
 
 
 /*-------------------------------------------------------------------------
-* Function:    H5FD_driver_query
-*
-* Purpose: Similar to H5FD_query(), but intended for cases when we don't
-*          have a file available (e.g. before one is opened). Since we
-*          can't use the file to get the driver, the driver is passed in
-*          as a parameter.
-*
-* Return:  Success:    non-negative
-*          Failure:    negative
-*
-* Programmer:  Jacob Gruber
-*              Wednesday, August 17, 2011
-*
-*-------------------------------------------------------------------------
-*/
-static int
-H5FD_driver_query(const H5FD_class_t *driver, unsigned long *flags/*out*/)
-{
-    int ret_value = 0;          /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    HDassert(driver);
-    HDassert(flags);
-
-    /* Check for the driver to query and then query it */
-    if(driver->query)
-        ret_value = (driver->query)(NULL, flags);
-    else 
-        *flags = 0;
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5FD_driver_query() */
-
-
-/*-------------------------------------------------------------------------
  * Function:	H5FDalloc
  *
  * Purpose:	Allocates SIZE bytes of memory from the FILE. The memory will
@@ -1156,9 +1019,6 @@ H5FD_driver_query(const H5FD_class_t *driver, unsigned long *flags/*out*/)
  *
  *		Failure:	The undefined address HADDR_UNDEF
  *
- * Programmer:	Robb Matzke
- *              Tuesday, July 27, 1999
- *
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -1182,8 +1042,11 @@ H5FDalloc(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, hsize_t size)
         if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, HADDR_UNDEF, "not a data transfer property list")
 
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
+
     /* Do the real work */
-    if(HADDR_UNDEF == (ret_value = H5FD_alloc_real(file, dxpl_id, type, size, NULL, NULL)))
+    if(HADDR_UNDEF == (ret_value = H5FD__alloc_real(file, type, size, NULL, NULL)))
 	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "unable to allocate file memory")
 
     /* (Note compensating for base address subtraction in internal routine) */
@@ -1208,11 +1071,6 @@ done:
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Wednesday, July 28, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1234,9 +1092,12 @@ H5FDfree(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, hsize_t siz
         if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data transfer property list")
 
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
+
     /* Do the real work */
     /* (Note compensating for base address addition in internal routine) */
-    if(H5FD_free_real(file, dxpl_id, type, addr - file->base_addr, size) < 0)
+    if(H5FD_free_real(file, type, addr - file->base_addr, size) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_CANTFREE, FAIL, "file deallocation request failed")
 
 done:
@@ -1245,16 +1106,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5FDget_eoa
+ * Function:    H5FDget_eoa
  *
- * Purpose:	Returns the address of the first byte after the last
- *		allocated memory in the file.
- *
- * Return:	Success:	First byte after allocated memory.
- *		Failure:	HADDR_UNDEF
+ * Purpose:     Returns the address of the first byte after the last
+ *              allocated memory in the file.
  *
- * Programmer:	Robb Matzke
- *              Friday, July 30, 1999
+ * Return:      Success:    First byte after allocated memory.
+ *              Failure:    HADDR_UNDEF
  *
  *-------------------------------------------------------------------------
  */
@@ -1268,13 +1126,13 @@ H5FDget_eoa(H5FD_t *file, H5FD_mem_t type)
 
     /* Check args */
     if(!file || !file->cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
     if(type < H5FD_MEM_DEFAULT || type >= H5FD_MEM_NTYPES)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file type")
 
     /* The real work */
     if(HADDR_UNDEF == (ret_value = H5FD_get_eoa(file, type)))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eoa request failed")
+        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eoa request failed")
 
     /* (Note compensating for base address subtraction in internal routine) */
     ret_value += file->base_addr;
@@ -1303,9 +1161,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative, no side effect
  *
- * Programmer:	Robb Matzke
- *              Friday, July 30, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1318,16 +1173,16 @@ H5FDset_eoa(H5FD_t *file, H5FD_mem_t type, haddr_t addr)
 
     /* Check args */
     if(!file || !file->cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file pointer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file pointer")
     if(type < H5FD_MEM_DEFAULT || type >= H5FD_MEM_NTYPES)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid file type")
     if(!H5F_addr_defined(addr) || addr > file->maxaddr)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid end-of-address value")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid end-of-address value")
 
     /* The real work */
     /* (Note compensating for base address addition in internal routine) */
     if(H5FD_set_eoa(file, type, addr - file->base_addr) < 0)
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "file set eoa request failed")
+        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "file set eoa request failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1353,11 +1208,6 @@ done:
  *
  *		Failure:	HADDR_UNDEF
  *
- * Programmer:	Robb Matzke
- *              Thursday, July 29, 1999
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -1370,11 +1220,11 @@ H5FDget_eof(H5FD_t *file, H5FD_mem_t type)
 
     /* Check arguments */
     if(!file || !file->cls)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, HADDR_UNDEF, "invalid file pointer")
 
     /* The real work */
     if(HADDR_UNDEF == (ret_value = H5FD_get_eof(file, type)))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eof request failed")
+        HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "file get eof request failed")
 
     /* (Note compensating for base address subtraction in internal routine) */
     ret_value += file->base_addr;
@@ -1392,9 +1242,6 @@ done:
  * Return:	Success:	The maximum address allowed in the file.
  *		Failure:	HADDR_UNDEF
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January  3, 2008
- *
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -1422,9 +1269,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Tuesday, January  8, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1450,8 +1294,6 @@ H5FD_get_feature_flags(const H5FD_t *file, unsigned long *feature_flags)
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; Oct 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1476,9 +1318,6 @@ H5FD_set_feature_flags(H5FD_t *file, unsigned long feature_flags)
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January 17, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1521,16 +1360,12 @@ done:
  *
  *		Failure:	Negative. The contents of BUF is undefined.
  *
- * Programmer:	Robb Matzke
- *              Thursday, July 29, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5FDread(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
 	 void *buf/*out*/)
 {
-    H5FD_io_info_t fdio_info;           /* File driver I/O object */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1549,24 +1384,12 @@ H5FDread(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size
     if(!buf)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null result buffer")
 
-    /* Set up the file driver I/O info object */
-    fdio_info.file = file;
-    if(H5FD_MEM_DRAW == type) {
-        if(NULL == (fdio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(H5AC_ind_read_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fdio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end if */
-    else {
-        if(NULL == (fdio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fdio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end else */
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
 
     /* Do the real work */
     /* (Note compensating for base address addition in internal routine) */
-    if(H5FD_read(&fdio_info, type, addr - file->base_addr, size, buf) < 0)
+    if(H5FD_read(file, type, addr - file->base_addr, size, buf) < 0)
 	HGOTO_ERROR(H5E_VFL, H5E_READERROR, FAIL, "file read request failed")
 
 done:
@@ -1586,16 +1409,12 @@ done:
  *
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Thursday, July 29, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5FDwrite(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t size,
 	  const void *buf)
 {
-    H5FD_io_info_t fdio_info;           /* File driver I/O object */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1613,24 +1432,12 @@ H5FDwrite(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr, size_t siz
     if(!buf)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "null buffer")
 
-    /* Set up the file driver I/O info object */
-    fdio_info.file = file;
-    if(H5FD_MEM_DRAW == type) {
-        if(NULL == (fdio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(H5AC_ind_read_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fdio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end if */
-    else {
-        if(NULL == (fdio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fdio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end else */
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
 
     /* The real work */
     /* (Note compensating for base address addition in internal routine) */
-    if(H5FD_write(&fdio_info, type, addr - file->base_addr, size, buf) < 0)
+    if(H5FD_write(file, type, addr - file->base_addr, size, buf) < 0)
 	HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "file write request failed")
 
 done:
@@ -1651,10 +1458,6 @@ done:
  * Programmer:	Robb Matzke
  *              Thursday, July 29, 1999
  *
- * Modifications:
- *              Quincey Koziol, May 20, 2002
- *              Added 'closing' parameter
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1674,13 +1477,16 @@ H5FDflush(H5FD_t *file, hid_t dxpl_id, hbool_t closing)
         if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data transfer property list")
 
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
+
     /* Do the real work */
-    if(H5FD_flush(file, dxpl_id, closing) < 0)
+    if(H5FD_flush(file, closing) < 0)
 	HGOTO_ERROR(H5E_VFL, H5E_CANTFLUSH, FAIL, "file flush request failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
-}
+} /* end H5FDflush() */
 
 
 /*-------------------------------------------------------------------------
@@ -1691,21 +1497,19 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Robb Matzke
- *              Wednesday, August  4, 1999
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FD_flush(H5FD_t *file, hid_t dxpl_id, hbool_t closing)
+H5FD_flush(H5FD_t *file, hbool_t closing)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
+    /* Sanity checks */
     HDassert(file && file->cls);
 
-    if(file->cls->flush && (file->cls->flush)(file, dxpl_id, closing) < 0)
+    if(file->cls->flush && (file->cls->flush)(file, H5CX_get_dxpl(), closing) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "driver flush request failed")
 
 done:
@@ -1721,9 +1525,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January 31, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1743,13 +1544,16 @@ H5FDtruncate(H5FD_t *file, hid_t dxpl_id, hbool_t closing)
         if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data transfer property list")
 
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
+
     /* Do the real work */
-    if(H5FD_truncate(file, dxpl_id, closing) < 0)
+    if(H5FD_truncate(file, closing) < 0)
 	HGOTO_ERROR(H5E_VFL, H5E_CANTUPDATE, FAIL, "file flush request failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
-}
+} /* end H5FDtruncate() */
 
 
 /*-------------------------------------------------------------------------
@@ -1760,21 +1564,20 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Quincey Koziol
- *              Thursday, January 31, 2008
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FD_truncate(H5FD_t *file, hid_t dxpl_id, hbool_t closing)
+H5FD_truncate(H5FD_t *file, hbool_t closing)
 {
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
+    /* Sanity checks */
     HDassert(file && file->cls);
 
-    if(file->cls->truncate && (file->cls->truncate)(file, dxpl_id, closing) < 0)
+    /* Dispatch to driver */
+    if(file->cls->truncate && (file->cls->truncate)(file, H5CX_get_dxpl(), closing) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_CANTUPDATE, FAIL, "driver truncate request failed")
 
 done:
@@ -1790,8 +1593,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; March 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1824,8 +1625,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; May 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1853,8 +1652,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; March 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1886,8 +1683,6 @@ done:
  * Return:	Success:	Non-negative
  *		Failure:	Negative
  *
- * Programmer:	Vailin Choi; May 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1916,9 +1711,6 @@ done:
  *
  * Return:	Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		March 27, 2002
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1947,8 +1739,6 @@ H5FD_get_fileno(const H5FD_t *file, unsigned long *filenum)
  * Programmer:  Raymond Lu
  *              Sep. 16, 2002
  *
- * Modifications:
- *
  *--------------------------------------------------------------------------
  */
 herr_t
@@ -2010,9 +1800,6 @@ done:
  *
  * Return:      Non-negative if succeed; negative if fails.
  *
- * Programmer:  Quincey Koziol
- *              Jan. 17, 2008
- *
  *--------------------------------------------------------------------------
  */
 herr_t
@@ -2038,9 +1825,6 @@ H5FD_set_base_addr(H5FD_t *file, haddr_t base_addr)
  * Return:	Success:	The absolute base address of the file
  *		Failure:	The undefined address (HADDR_UNDEF)
  *
- * Programmer:  Quincey Koziol
- *              Sept. 10, 2009
- *
  *--------------------------------------------------------------------------
  */
 haddr_t
@@ -2062,8 +1846,6 @@ H5FD_get_base_addr(const H5FD_t *file)
  *
  * Return:      Non-negative if succeed; negative if fails.
  *
- * Programmer:  Vailin Choi; April 2013
- *
  *--------------------------------------------------------------------------
  */
 herr_t
@@ -2078,3 +1860,39 @@ H5FD_set_paged_aggr(H5FD_t *file, hbool_t paged)
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5FD_set_paged_aggr() */
+
+
+/*-------------------------------------------------------------------------
+* Function: H5FDdriver_query
+*
+* Purpose:  Similar to H5FD_query(), but intended for cases when we don't
+*           have a file available (e.g. before one is opened). Since we
+*           can't use the file to get the driver, the driver ID is passed
+*           in as a parameter.
+*
+* Return:   SUCCEED/FAIL
+*
+*-------------------------------------------------------------------------
+*/
+herr_t
+H5FDdriver_query(hid_t driver_id, unsigned long *flags/*out*/)
+{
+    H5FD_class_t *driver = NULL;            /* Pointer to VFD class struct  */
+    herr_t ret_value = SUCCEED;             /* Return value                 */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE2("e", "ix", driver_id, flags);
+
+    if(NULL == flags)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "flags parameter cannot be NULL")
+
+    /* Check for the driver to query and then query it */
+    if (NULL == (driver = (H5FD_class_t *)H5I_object_verify(driver_id, H5I_VFL)))
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "not a VFL ID")
+    if (H5FD_driver_query(driver, flags) < 0)
+        HGOTO_ERROR(H5E_VFL, H5E_BADVALUE, FAIL, "driver flag query failed")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5FDdriver_query() */
+
diff --git a/src/H5FDcore.c b/src/H5FDcore.c
index 9090679..2ab04dc 100644
--- a/src/H5FDcore.c
+++ b/src/H5FDcore.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -600,7 +598,7 @@ H5FD__core_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr
 {
     int                 o_flags;
     H5FD_core_t         *file = NULL;
-    H5FD_core_fapl_t    *fa = NULL;
+    const H5FD_core_fapl_t    *fa = NULL;
     H5P_genplist_t      *plist;         /* Property list pointer */
 #ifdef H5_HAVE_WIN32_API
     struct _BY_HANDLE_FILE_INFORMATION fileinfo;
@@ -622,7 +620,7 @@ H5FD__core_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr
     HDassert(H5P_DEFAULT != fapl_id);
     if(NULL == (plist = (H5P_genplist_t *)H5I_object(fapl_id)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a file access property list")
-    if(NULL == (fa = (H5FD_core_fapl_t *)H5P_peek_driver_info(plist)))
+    if(NULL == (fa = (const H5FD_core_fapl_t *)H5P_peek_driver_info(plist)))
         HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, NULL, "bad VFL driver info")
 
     /* Build the open flags */
@@ -640,7 +638,7 @@ H5FD__core_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr
              ((file_image_info.buffer == NULL) && (file_image_info.size == 0)));
     HDmemset(&sb, 0, sizeof(sb));
     if((file_image_info.buffer != NULL) && !(H5F_ACC_CREAT & flags)) {
-        if(HDopen(name, o_flags, 0666) >= 0)
+        if(HDopen(name, o_flags, H5_POSIX_CREATE_MODE_RW) >= 0)
             HGOTO_ERROR(H5E_FILE, H5E_FILEEXISTS, NULL, "file already exists")
         
         /* If backing store is requested, create and stat the file
@@ -648,7 +646,7 @@ H5FD__core_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr
          * technically an open.
          */
         if(fa->backing_store) {
-            if((fd = HDopen(name, o_flags | O_CREAT, 0666)) < 0)
+            if((fd = HDopen(name, o_flags | O_CREAT, H5_POSIX_CREATE_MODE_RW)) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to create file")
             if(HDfstat(fd, &sb) < 0)
                 HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, NULL, "unable to fstat file")
@@ -658,7 +656,7 @@ H5FD__core_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr
      * store is off is when  the backing_store flag is off and H5F_ACC_CREAT is
      * on. */
     else if(fa->backing_store || !(H5F_ACC_CREAT & flags)) {
-        if((fd = HDopen(name, o_flags, 0666)) < 0)
+        if((fd = HDopen(name, o_flags, H5_POSIX_CREATE_MODE_RW)) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file")
         if(HDfstat(fd, &sb) < 0)
             HSYS_GOTO_ERROR(H5E_FILE, H5E_BADFILE, NULL, "unable to fstat file")
@@ -984,9 +982,11 @@ H5FD__core_query(const H5FD_t * _file, unsigned long *flags /* out */)
         *flags |= H5FD_FEAT_ALLOW_FILE_IMAGE;               /* OK to use file image feature with this VFD                       */
         *flags |= H5FD_FEAT_CAN_USE_FILE_IMAGE_CALLBACKS;   /* OK to use file image callbacks with this VFD                     */
 
-        /* If the backing store is open, a POSIX file handle is available */
-        if(file && file->fd >= 0 && file->backing_store)
-            *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE; /* VFD handle is POSIX I/O call compatible */
+        /* These feature flags are only applicable if the backing store is enabled */
+        if(file && file->fd >= 0 && file->backing_store) {
+            *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE;        /* get_handle callback returns a POSIX file descriptor              */
+            *flags |= H5FD_FEAT_DEFAULT_VFD_COMPATIBLE;     /* VFD creates a file which can be opened with the default VFD      */
+        }
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
diff --git a/src/H5FDcore.h b/src/H5FDcore.h
index 16cce89..5fe2912 100644
--- a/src/H5FDcore.h
+++ b/src/H5FDcore.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDdirect.c b/src/H5FDdirect.c
index 2034ba0..811ea8e 100644
--- a/src/H5FDdirect.c
+++ b/src/H5FDdirect.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -489,7 +487,7 @@ H5FD_direct_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxadd
     o_flags |= O_DIRECT;
 
     /* Open the file */
-    if ((fd=HDopen(name, o_flags, 0666))<0)
+    if ((fd = HDopen(name, o_flags, H5_POSIX_CREATE_MODE_RW))<0)
         HSYS_GOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file")
 
     if (HDfstat(fd, &sb)<0)
@@ -700,6 +698,7 @@ H5FD_direct_query(const H5FD_t H5_ATTR_UNUSED * _f, unsigned long *flags /* out
         *flags |= H5FD_FEAT_ACCUMULATE_METADATA;    /* OK to accumulate metadata for faster writes                      */
         *flags |= H5FD_FEAT_DATA_SIEVE;             /* OK to perform data sieving for faster raw data reads & writes    */
         *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA;    /* OK to aggregate "small" raw data allocations                     */
+        *flags |= H5FD_FEAT_DEFAULT_VFD_COMPATIBLE; /* VFD creates a file which can be opened with the default VFD      */
     }
 
     FUNC_LEAVE_NOAPI(SUCCEED)
diff --git a/src/H5FDdirect.h b/src/H5FDdirect.h
index 5ceb91f..805f3be 100644
--- a/src/H5FDdirect.h
+++ b/src/H5FDdirect.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDdrvr_module.h b/src/H5FDdrvr_module.h
index 8bb83a1..59a419e 100644
--- a/src/H5FDdrvr_module.h
+++ b/src/H5FDdrvr_module.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDfamily.c b/src/H5FDfamily.c
index 4c4cad0..3c1c7bb 100644
--- a/src/H5FDfamily.c
+++ b/src/H5FDfamily.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -38,6 +36,7 @@
 
 
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fprivate.h"		/* File access				*/
 #include "H5FDprivate.h"	/* File drivers				*/
@@ -1267,7 +1266,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5FD_family_flush(H5FD_t *_file, hid_t dxpl_id, hbool_t closing)
+H5FD_family_flush(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t closing)
 {
     H5FD_family_t	*file = (H5FD_family_t*)_file;
     unsigned		u, nerrors = 0;
@@ -1276,7 +1275,7 @@ H5FD_family_flush(H5FD_t *_file, hid_t dxpl_id, hbool_t closing)
     FUNC_ENTER_NOAPI_NOINIT
 
     for(u = 0; u < file->nmembs; u++)
-        if(file->memb[u] && H5FD_flush(file->memb[u], dxpl_id, closing) < 0)
+        if(file->memb[u] && H5FD_flush(file->memb[u], closing) < 0)
             nerrors++;
 
     if(nerrors)
@@ -1302,7 +1301,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5FD_family_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing)
+H5FD_family_truncate(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t closing)
 {
     H5FD_family_t	*file = (H5FD_family_t*)_file;
     unsigned		u, nerrors = 0;
@@ -1311,7 +1310,7 @@ H5FD_family_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closing)
     FUNC_ENTER_NOAPI_NOINIT
 
     for(u = 0; u < file->nmembs; u++)
-        if(file->memb[u] && H5FD_truncate(file->memb[u], dxpl_id, closing) < 0)
+        if(file->memb[u] && H5FD_truncate(file->memb[u], closing) < 0)
             nerrors++;
 
     if(nerrors)
diff --git a/src/H5FDfamily.h b/src/H5FDfamily.h
index 80969c3..1584cf6 100644
--- a/src/H5FDfamily.h
+++ b/src/H5FDfamily.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDint.c b/src/H5FDint.c
index 0809ac8..023ff57 100644
--- a/src/H5FDint.c
+++ b/src/H5FDint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -35,6 +33,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fprivate.h"         /* File access				*/
 #include "H5FDpkg.h"		/* File Drivers				*/
@@ -93,9 +92,8 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FD_locate_signature(H5FD_io_info_t *fdio_info, haddr_t *sig_addr)
+H5FD_locate_signature(H5FD_t *file, haddr_t *sig_addr)
 {
-    H5FD_t         *file;
     haddr_t         addr, eoa, eof;
     uint8_t         buf[H5F_SIGNATURE_LEN];
     unsigned        n, maxpow;
@@ -103,8 +101,7 @@ H5FD_locate_signature(H5FD_io_info_t *fdio_info, haddr_t *sig_addr)
 
     FUNC_ENTER_NOAPI_NOINIT
 
-    HDassert(fdio_info);
-    file = fdio_info->file;
+    /* Sanity checks */
     HDassert(file);
 
     /* Find the least N such that 2^N is larger than the file size */
@@ -125,7 +122,7 @@ H5FD_locate_signature(H5FD_io_info_t *fdio_info, haddr_t *sig_addr)
         addr = (8 == n) ? 0 : (haddr_t)1 << n;
         if(H5FD_set_eoa(file, H5FD_MEM_SUPER, addr + H5F_SIGNATURE_LEN) < 0)
             HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to set EOA value for file signature")
-        if(H5FD_read(fdio_info, H5FD_MEM_SUPER, addr, (size_t)H5F_SIGNATURE_LEN, buf) < 0)
+        if(H5FD_read(file, H5FD_MEM_SUPER, addr, (size_t)H5F_SIGNATURE_LEN, buf) < 0)
             HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to read file signature")
         if(!HDmemcmp(buf, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN))
             break;
@@ -163,47 +160,20 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FD_read(H5FD_io_info_t *fdio_info, H5FD_mem_t type, haddr_t addr,
-    size_t size, void *buf/*out*/)
+H5FD_read(H5FD_t *file, H5FD_mem_t type, haddr_t addr, size_t size,
+    void *buf/*out*/)
 {
-    H5FD_t      *file;
-    H5P_genplist_t *io_dxpl;
-    haddr_t     eoa = HADDR_UNDEF;
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    hid_t dxpl_id;                      /* DXPL for operation */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert(fdio_info);
-    file = fdio_info->file;
+    /* Sanity checks */
     HDassert(file && file->cls);
-    HDassert(TRUE == H5P_class_isa(H5P_CLASS(fdio_info->meta_dxpl), H5P_CLS_DATASET_XFER_g));
-    HDassert(TRUE == H5P_class_isa(H5P_CLASS(fdio_info->raw_dxpl), H5P_CLS_DATASET_XFER_g));
     HDassert(buf);
 
-    /* Set up proper DXPL for I/O */
-    if(H5FD_MEM_DRAW == type)
-        io_dxpl = fdio_info->raw_dxpl;
-    else
-        io_dxpl = fdio_info->meta_dxpl;
-
-    /* Sanity check the dxpl type against the mem type */
-#ifdef H5_DEBUG_BUILD
-    {
-        H5FD_dxpl_type_t dxpl_type;    /* Property indicating the type of the internal dxpl */
-
-        /* get the dxpl type */
-        if(H5P_get(io_dxpl, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-            HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't retrieve dxpl type")
-
-        /* we shouldn't be here if the dxpl is labeled with NO I/O */
-        HDassert(H5FD_NOIO_DXPL != dxpl_type);
-
-        if(H5FD_MEM_DRAW == type)
-            HDassert(H5FD_RAWDATA_DXPL == dxpl_type);
-        else
-            HDassert(H5FD_METADATA_DXPL == dxpl_type);
-    }
-#endif /* H5_DEBUG_BUILD */
+    /* Get proper DXPL for I/O */
+    dxpl_id = H5CX_get_dxpl();
 
 #ifndef H5_HAVE_PARALLEL
     /* Do not return early for Parallel mode since the I/O could be a */
@@ -213,9 +183,6 @@ H5FD_read(H5FD_io_info_t *fdio_info, H5FD_mem_t type, haddr_t addr,
         HGOTO_DONE(SUCCEED)
 #endif /* H5_HAVE_PARALLEL */
 
-    if(HADDR_UNDEF == (eoa = (file->cls->get_eoa)(file, type)))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "driver get_eoa request failed")
-
     /* 
      * If the file is open for SWMR read access, allow access to data past
      * the end of the allocated space (the 'eoa').  This is done because the
@@ -223,11 +190,18 @@ H5FD_read(H5FD_io_info_t *fdio_info, H5FD_mem_t type, haddr_t addr,
      * objects being written within the file by the application performing
      * SWMR write operations.
      */
-    if(!(file->access_flags & H5F_ACC_SWMR_READ) && ((addr + file->base_addr + size) > eoa))
-        HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size = %llu, eoa = %llu", (unsigned long long)(addr + file->base_addr), (unsigned long long)size, (unsigned long long)eoa)
+    if(!(file->access_flags & H5F_ACC_SWMR_READ)) {
+        haddr_t     eoa;
+
+        if(HADDR_UNDEF == (eoa = (file->cls->get_eoa)(file, type)))
+            HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, FAIL, "driver get_eoa request failed")
+
+         if((addr + file->base_addr + size) > eoa)
+            HGOTO_ERROR(H5E_ARGS, H5E_OVERFLOW, FAIL, "addr overflow, addr = %llu, size = %llu, eoa = %llu", (unsigned long long)(addr + file->base_addr), (unsigned long long)size, (unsigned long long)eoa)
+    } /* end if */
 
     /* Dispatch to driver */
-    if((file->cls->read)(file, type, H5P_PLIST_ID(io_dxpl), addr + file->base_addr, size, buf) < 0)
+    if((file->cls->read)(file, type, dxpl_id, addr + file->base_addr, size, buf) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_READERROR, FAIL, "driver read request failed")
 
 done:
@@ -249,47 +223,21 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FD_write(const H5FD_io_info_t *fdio_info, H5FD_mem_t type, haddr_t addr,
-    size_t size, const void *buf)
+H5FD_write(H5FD_t *file, H5FD_mem_t type, haddr_t addr, size_t size,
+    const void *buf)
 {
-    H5FD_t      *file;
-    H5P_genplist_t *io_dxpl;
-    haddr_t     eoa = HADDR_UNDEF;
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    hid_t dxpl_id;                      /* DXPL for operation */
+    haddr_t eoa = HADDR_UNDEF;          /* EOA for file */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert(fdio_info);
-    file = fdio_info->file;
+    /* Sanity checks */
     HDassert(file && file->cls);
-    HDassert(TRUE == H5P_class_isa(H5P_CLASS(fdio_info->meta_dxpl), H5P_CLS_DATASET_XFER_g));
-    HDassert(TRUE == H5P_class_isa(H5P_CLASS(fdio_info->raw_dxpl), H5P_CLS_DATASET_XFER_g));
     HDassert(buf);
 
-    /* Set up proper DXPL for I/O */
-    if(H5FD_MEM_DRAW == type)
-        io_dxpl = fdio_info->raw_dxpl;
-    else
-        io_dxpl = fdio_info->meta_dxpl;
-
-    /* Sanity check the dxpl type against the mem type */
-#ifdef H5_DEBUG_BUILD
-    {
-        H5FD_dxpl_type_t dxpl_type;    /* Property indicating the type of the internal dxpl */
-
-        /* get the dxpl type */
-        if(H5P_get(io_dxpl, H5FD_DXPL_TYPE_NAME, &dxpl_type) < 0)
-            HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't retrieve dxpl type")
-
-        /* we shouldn't be here if the dxpl is labeled with NO I/O */
-        HDassert(H5FD_NOIO_DXPL != dxpl_type);
-
-        if(H5FD_MEM_DRAW == type)
-            HDassert(H5FD_RAWDATA_DXPL == dxpl_type);
-        else
-            HDassert(H5FD_METADATA_DXPL == dxpl_type);
-    }
-#endif /* H5_DEBUG_BUILD */
+    /* Get proper DXPL for I/O */
+    dxpl_id = H5CX_get_dxpl();
 
 #ifndef H5_HAVE_PARALLEL
     /* Do not return early for Parallel mode since the I/O could be a */
@@ -306,7 +254,7 @@ H5FD_write(const H5FD_io_info_t *fdio_info, H5FD_mem_t type, haddr_t addr,
                     (unsigned long long)(addr+ file->base_addr), (unsigned long long)size, (unsigned long long)eoa)
 
     /* Dispatch to driver */
-    if((file->cls->write)(file, type, H5P_PLIST_ID(io_dxpl), addr + file->base_addr, size, buf) < 0)
+    if((file->cls->write)(file, type, dxpl_id, addr + file->base_addr, size, buf) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_WRITEERROR, FAIL, "driver write request failed")
 
 done:
@@ -435,3 +383,38 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5FD_get_eof() */
 
+
+/*-------------------------------------------------------------------------
+* Function:    H5FD_driver_query
+*
+* Purpose: Similar to H5FD_query(), but intended for cases when we don't
+*          have a file available (e.g. before one is opened). Since we
+*          can't use the file to get the driver, the driver is passed in
+*          as a parameter.
+*
+* Return:  SUCCEED/FAIL
+*
+* Programmer:  Jacob Gruber
+*              Wednesday, August 17, 2011
+*
+*-------------------------------------------------------------------------
+*/
+herr_t
+H5FD_driver_query(const H5FD_class_t *driver, unsigned long *flags/*out*/)
+{
+    herr_t ret_value = SUCCEED;          /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(driver);
+    HDassert(flags);
+
+    /* Check for the driver to query and then query it */
+    if(driver->query)
+        ret_value = (driver->query)(NULL, flags);
+    else 
+        *flags = 0;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FD_driver_query() */
+
diff --git a/src/H5FDlog.c b/src/H5FDlog.c
index f320946..7c2297a 100644
--- a/src/H5FDlog.c
+++ b/src/H5FDlog.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -522,7 +520,7 @@ H5FD_log_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr)
         HDgettimeofday(&timeval_start, NULL);
 #endif /* H5_HAVE_GETTIMEOFDAY */
     /* Open the file */
-    if((fd = HDopen(name, o_flags, 0666)) < 0) {
+    if((fd = HDopen(name, o_flags, H5_POSIX_CREATE_MODE_RW)) < 0) {
         int myerrno = errno;
 
         HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file: name = '%s', errno = %d, error message = '%s', flags = %x, o_flags = %x", name, myerrno, HDstrerror(myerrno), flags, (unsigned)o_flags);
@@ -897,8 +895,9 @@ H5FD_log_query(const H5FD_t *_file, unsigned long *flags /* out */)
         *flags |= H5FD_FEAT_ACCUMULATE_METADATA;    /* OK to accumulate metadata for faster writes                      */
         *flags |= H5FD_FEAT_DATA_SIEVE;             /* OK to perform data sieving for faster raw data reads & writes    */
         *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA;    /* OK to aggregate "small" raw data allocations                     */
-        *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE;    /* VFD handle is POSIX I/O call compatible                          */
+        *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE;    /* get_handle callback returns a POSIX file descriptor              */
         *flags |= H5FD_FEAT_SUPPORTS_SWMR_IO;       /* VFD supports the single-writer/multiple-readers (SWMR) pattern   */
+        *flags |= H5FD_FEAT_DEFAULT_VFD_COMPATIBLE; /* VFD creates a file which can be opened with the default VFD      */
 
         /* Check for flags that are set by h5repart */
         if(file && file->fam_to_sec2)
diff --git a/src/H5FDlog.h b/src/H5FDlog.h
index 11044e2..a69bb18 100644
--- a/src/H5FDlog.h
+++ b/src/H5FDlog.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDmodule.h b/src/H5FDmodule.h
index 6358e86..ea1a9fd 100644
--- a/src/H5FDmodule.h
+++ b/src/H5FDmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDmpi.c b/src/H5FDmpi.c
index bf4e03a..4b42a73 100644
--- a/src/H5FDmpi.c
+++ b/src/H5FDmpi.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -23,6 +21,7 @@
 
 
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fprivate.h"		/* File access				*/
 #include "H5FDprivate.h"	/* File drivers				*/
@@ -177,9 +176,8 @@ H5FD_get_mpi_info(H5FD_t *file, void** mpi_info)
     HDassert(cls->get_mpi_info);    /* All MPI drivers must implement this */
 
     /* Dispatch to driver */
-    if ((ret_value=(cls->get_mpi_info)(file, mpi_info)) < 0)
-        HGOTO_ERROR(H5E_VFL, H5E_CANTGET, MPI_COMM_NULL, \
-                    "driver get_mpi_info request failed")
+    if((ret_value = (cls->get_mpi_info)(file, mpi_info)) < 0)
+        HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "driver get_mpi_info request failed")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -317,6 +315,11 @@ H5FD_mpi_comm_info_dup(MPI_Comm comm, MPI_Info info, MPI_Comm *comm_new, MPI_Inf
 	info_dup = info;
     }
 
+    /* Set MPI_ERRORS_RETURN on comm_dup so that MPI failures are not fatal, 
+       and return codes can be checked and handled. May 23, 2017 FTW */
+    if (MPI_SUCCESS != (mpi_code = MPI_Comm_set_errhandler(comm_dup, MPI_ERRORS_RETURN)))
+        HMPI_GOTO_ERROR(FAIL, "MPI_Errhandler_set failed", mpi_code)
+ 
     /* copy them to the return arguments */
     *comm_new = comm_dup;
     *info_new = info_dup;
@@ -477,44 +480,5 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 }
 #endif /* NOT_YET */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5FD_mpi_setup_collective
- *
- * Purpose:	Set the buffer type BTYPE, file type FTYPE for a data
- *		transfer. Also request a MPI type transfer.
- *
- * Return:	Success:	0
- *		Failure:	-1
- *
- * Programmer:	Robb Matzke
- *              Monday, August  9, 1999
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5FD_mpi_setup_collective(hid_t dxpl_id, MPI_Datatype *btype, MPI_Datatype *ftype)
-{
-    H5P_genplist_t *plist;      /* Property list pointer */
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check arguments */
-    if(NULL == (plist = H5P_object_verify(dxpl_id,H5P_DATASET_XFER)))
-        HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a dataset transfer list")
-
-    /* Set buffer MPI type */
-    if(H5P_set(plist, H5FD_MPI_XFER_MEM_MPI_TYPE_NAME, btype) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set MPI-I/O property")
-
-    /* Set File MPI type */
-    if(H5P_set(plist, H5FD_MPI_XFER_FILE_MPI_TYPE_NAME, ftype) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set MPI-I/O property")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5FD_mpi_setup_collective() */
-
 #endif /* H5_HAVE_PARALLEL */
+
diff --git a/src/H5FDmpi.h b/src/H5FDmpi.h
index 784fe70..2d62c79 100644
--- a/src/H5FDmpi.h
+++ b/src/H5FDmpi.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDmpio.c b/src/H5FDmpio.c
index 9417d46..ee3277d 100644
--- a/src/H5FDmpio.c
+++ b/src/H5FDmpio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -25,6 +23,7 @@
 
 
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"		/* Dataset functions			*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fprivate.h"		/* File access				*/
@@ -1061,7 +1060,7 @@ done:
         fprintf(stdout, "Leaving H5FD_mpio_open\n" );
 #endif
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5FD_mpio_open() */
 
 
 /*-------------------------------------------------------------------------
@@ -1152,10 +1151,11 @@ H5FD_mpio_query(const H5FD_t H5_ATTR_UNUSED *_file, unsigned long *flags /* out
     /* Set the VFL feature flags that this driver supports */
     if(flags) {
         *flags=0;
-        *flags|=H5FD_FEAT_AGGREGATE_METADATA;  /* OK to aggregate metadata allocations */
-        *flags|=H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */
-        *flags|=H5FD_FEAT_HAS_MPI;             /* This driver uses MPI */
-        *flags|=H5FD_FEAT_ALLOCATE_EARLY;      /* Allocate space early instead of late */
+        *flags |= H5FD_FEAT_AGGREGATE_METADATA;     /* OK to aggregate metadata allocations                             */
+        *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA;    /* OK to aggregate "small" raw data allocations                     */
+        *flags |= H5FD_FEAT_HAS_MPI;                /* This driver uses MPI                                             */
+        *flags |= H5FD_FEAT_ALLOCATE_EARLY;         /* Allocate space early instead of late                             */
+        *flags |= H5FD_FEAT_DEFAULT_VFD_COMPATIBLE; /* VFD creates a file which can be opened with the default VFD      */
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -1411,8 +1411,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, haddr_t addr, size_t size,
-	       void *buf/*out*/)
+H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type,
+    hid_t H5_ATTR_UNUSED dxpl_id, haddr_t addr, size_t size, void *buf/*out*/)
 {
     H5FD_mpio_t			*file = (H5FD_mpio_t*)_file;
     MPI_Offset			mpi_off;
@@ -1431,7 +1431,6 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had
     int                         io_size;        /* Actual number of bytes requested */
     int         		n;
 #endif
-    H5P_genplist_t              *plist = NULL;  /* Property list pointer */
     hbool_t			use_view_this_time = FALSE;
     herr_t              	ret_value = SUCCEED;
 
@@ -1443,9 +1442,6 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had
 #endif
     HDassert(file);
     HDassert(H5FD_MPIO==file->pub.driver_id);
-    /* Make certain we have the correct type of property list */
-    HDassert(H5I_GENPROP_LST==H5I_get_type(dxpl_id));
-    HDassert(TRUE==H5P_isa_class(dxpl_id,H5P_DATASET_XFER));
     HDassert(buf);
 
     /* Portably initialize MPI status variable */
@@ -1468,13 +1464,9 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had
     if(type == H5FD_MEM_DRAW) {
         H5FD_mpio_xfer_t            xfer_mode;   /* I/O tranfer mode */
 
-        /* Obtain the data transfer properties */
-        if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
-
-        /* get the transfer mode from the dxpl */
-        if(H5P_get(plist, H5D_XFER_IO_XFER_MODE_NAME, &xfer_mode)<0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
+        /* Get the transfer mode from the API context */
+        if(H5CX_get_io_xfer_mode(&xfer_mode) < 0)
+            HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
 
         /*
          * Set up for a fancy xfer using complex types, or single byte block. We
@@ -1488,11 +1480,9 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had
             /* Remember that views are used */
             use_view_this_time = TRUE;
 
-            /* prepare for a full-blown xfer using btype, ftype, and disp */
-            if(H5P_get(plist, H5FD_MPI_XFER_MEM_MPI_TYPE_NAME, &buf_type) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
-            if(H5P_get(plist, H5FD_MPI_XFER_FILE_MPI_TYPE_NAME, &file_type) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
+            /* Prepare for a full-blown xfer using btype, ftype, and disp */
+            if(H5CX_get_mpi_coll_datatypes(&buf_type, &file_type) < 0)
+                HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't get MPI-I/O datatypes")
 
             /*
              * Set the file view when we are using MPI derived types
@@ -1509,18 +1499,15 @@ H5FD_mpio_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t dxpl_id, had
 
     /* Read the data. */
     if(use_view_this_time) {
-       H5FD_mpio_collective_opt_t coll_opt_mode;
+        H5FD_mpio_collective_opt_t coll_opt_mode;
 
 #ifdef H5FDmpio_DEBUG
 	if (H5FD_mpio_Debug[(int)'t'])
 	    fprintf(stdout, "H5FD_mpio_read: using MPIO collective mode\n");
 #endif
         /* Get the collective_opt property to check whether the application wants to do IO individually. */
-        HDassert(plist);
-
-        /* get the transfer mode from the dxpl */
-        if(H5P_get(plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, &coll_opt_mode) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O collective_op property")
+        if(H5CX_get_mpio_coll_opt(&coll_opt_mode) < 0)
+            HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't get MPI-I/O collective_op property")
 
         if(coll_opt_mode == H5FD_MPIO_COLLECTIVE_IO) {
 #ifdef H5FDmpio_DEBUG
@@ -1711,8 +1698,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
-		size_t size, const void *buf)
+H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t H5_ATTR_UNUSED dxpl_id,
+    haddr_t addr, size_t size, const void *buf)
 {
     H5FD_mpio_t			*file = (H5FD_mpio_t*)_file;
     MPI_Offset 		 	mpi_off;
@@ -1730,7 +1717,6 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
 #endif
     int                         size_i;
     hbool_t			use_view_this_time = FALSE;
-    H5P_genplist_t              *plist = NULL;  /* Property list pointer */
     H5FD_mpio_xfer_t            xfer_mode;   /* I/O tranfer mode */
     herr_t              	ret_value = SUCCEED;
 
@@ -1742,11 +1728,11 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
 #endif
     HDassert(file);
     HDassert(H5FD_MPIO==file->pub.driver_id);
-    /* Make certain we have the correct type of property list */
-    HDassert(H5I_GENPROP_LST==H5I_get_type(dxpl_id));
-    HDassert(TRUE==H5P_isa_class(dxpl_id,H5P_DATASET_XFER));
     HDassert(buf);
 
+    /* Verify that no data is written when between MPI_Barrier()s during file flush */
+    HDassert(!H5CX_get_mpi_file_flushing());
+
     /* Portably initialize MPI status variable */
     HDmemset(&mpi_stat, 0, sizeof(MPI_Status));
 
@@ -1762,13 +1748,9 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
         fprintf(stdout, "in H5FD_mpio_write  mpi_off=%ld  size_i=%d\n", (long)mpi_off, size_i);
 #endif
 
-    /* Obtain the data transfer properties */
-    if(NULL == (plist = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file access property list")
-
-    /* get the transfer mode from the dxpl */
-    if(H5P_get(plist, H5D_XFER_IO_XFER_MODE_NAME, &xfer_mode)<0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
+    /* Get the transfer mode from the API context */
+    if(H5CX_get_io_xfer_mode(&xfer_mode) < 0)
+        HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't get MPI-I/O transfer mode")
 
     /*
      * Set up for a fancy xfer using complex types, or single byte block. We
@@ -1782,11 +1764,9 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
         /* Remember that views are used */
         use_view_this_time = TRUE;
 
-        /* prepare for a full-blown xfer using btype, ftype, and disp */
-        if(H5P_get(plist, H5FD_MPI_XFER_MEM_MPI_TYPE_NAME, &buf_type) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
-        if(H5P_get(plist, H5FD_MPI_XFER_FILE_MPI_TYPE_NAME, &file_type) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O type property")
+        /* Prepare for a full-blown xfer using btype, ftype, and disp */
+        if(H5CX_get_mpi_coll_datatypes(&buf_type, &file_type) < 0)
+            HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't get MPI-I/O datatypes")
 
         /*
          * Set the file view when we are using MPI derived types
@@ -1810,10 +1790,8 @@ H5FD_mpio_write(H5FD_t *_file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
 #endif
 
         /* Get the collective_opt property to check whether the application wants to do IO individually. */
-        HDassert(plist);
-        /* get the transfer mode from the dxpl */
-        if(H5P_get(plist, H5D_XFER_MPIO_COLLECTIVE_OPT_NAME, &coll_opt_mode)<0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get MPI-I/O collective_op property")
+        if(H5CX_get_mpio_coll_opt(&coll_opt_mode) < 0)
+            HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't get MPI-I/O collective_op property")
 
         if(coll_opt_mode == H5FD_MPIO_COLLECTIVE_IO) {
 #ifdef H5FDmpio_DEBUG
@@ -1917,10 +1895,9 @@ H5FD_mpio_flush(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t closing)
     HDassert(H5FD_MPIO == file->pub.driver_id);
 
     /* Only sync the file if we are not going to immediately close it */
-    if(!closing) {
+    if(!closing)
         if(MPI_SUCCESS != (mpi_code = MPI_File_sync(file->f)))
             HMPI_GOTO_ERROR(FAIL, "MPI_File_sync failed", mpi_code)
-    } /* end if */
 
 done:
 #ifdef H5FDmpio_DEBUG
@@ -1937,12 +1914,33 @@ done:
  *
  * Purpose:     Make certain the file's size matches it's allocated size
  *
+ *              This is a little sticky in the mpio case, as it is not 
+ *              easy for us to track the current EOF by extracting it from
+ *              write calls. 
+ *
+ *              Instead, we first check to see if the eoa has changed since
+ *              the last call to this function.  If it has, we call 
+ *              MPI_File_get_size() to determine the current EOF, and 
+ *              only call MPI_File_set_size() if this value disagrees 
+ *              with the current eoa.
+ *
  * Return:      Success:	Non-negative
  * 		Failure:	Negative
  *
  * Programmer:  Quincey Koziol
  *              January 31, 2008
  *
+ * Changes:     Heavily reworked to avoid unnecessary MPI_File_set_size()
+ *              calls.  The hope is that these calls are superfluous in the
+ *              typical case, allowing us to avoid truncates most of the 
+ *              time.
+ *
+ *              The basic idea is to query the file system to get the 
+ *              current eof, and only truncate if the file systems 
+ *              conception of the eof disagrees with our eoa.
+ *
+ *                                                 JRM -- 10/27/17
+ *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -1960,29 +1958,60 @@ H5FD_mpio_truncate(H5FD_t *_file, hid_t H5_ATTR_UNUSED dxpl_id, hbool_t H5_ATTR_
     HDassert(file);
     HDassert(H5FD_MPIO == file->pub.driver_id);
 
-    /* Extend the file to make sure it's large enough, then sync.
-     * Unfortunately, keeping track of EOF is an expensive operation, so
-     * we can't just check whether EOF<EOA like with other drivers.
-     * Therefore we'll just read the byte at EOA-1 and then write it back. */
-    if(file->eoa > file->last_eoa) {
-        int		mpi_code;	/* mpi return code */
-        MPI_Offset      mpi_off;
+    if(!H5F_addr_eq(file->eoa, file->last_eoa)) {
+        int             mpi_code;       /* mpi return code */
+        MPI_Offset      size;
+        MPI_Offset      needed_eof;
+
+        /* In principle, it is possible for the size returned by the 
+         * call to MPI_File_get_size() to depend on whether writes from 
+         * all proceeses have completed at the time process 0 makes the
+         * call.  
+         *
+         * In practice, most (all?) truncate calls will come after a barrier
+         * and with no interviening writes to the file (with the possible 
+         * exception of sueprblock / superblock extension message updates).
+         *
+         * Check the "MPI file closing" flag in the API context to determine
+         * if we can skip the barrier.
+         */
+        if(!H5CX_get_mpi_file_flushing())
+            if(MPI_SUCCESS != (mpi_code = MPI_Barrier(file->comm)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_code)
 
-        if(H5FD_mpi_haddr_to_MPIOff(file->eoa, &mpi_off) < 0)
-            HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "cannot convert from haddr_t to MPI_Offset")
+        /* Only processor p0 will get the filesize and broadcast it. */
+        /* (Note that throwing an error here will cause non-rank 0 processes
+         *      to hang in following Bcast.  -QAK, 3/17/2018)
+         */
+        if(0 == file->mpi_rank)
+            if(MPI_SUCCESS != (mpi_code = MPI_File_get_size(file->f, &size)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_File_get_size failed", mpi_code)
 
-        /* Extend the file's size */
-        if(MPI_SUCCESS != (mpi_code = MPI_File_set_size(file->f, mpi_off)))
-            HMPI_GOTO_ERROR(FAIL, "MPI_File_set_size failed", mpi_code)
+        /* Broadcast file size */
+        if(MPI_SUCCESS != (mpi_code = MPI_Bcast(&size, (int)sizeof(MPI_Offset), MPI_BYTE, 0, file->comm)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Bcast failed", mpi_code)
 
-	/* Don't let any proc return until all have extended the file.
-         * (Prevents race condition where some processes go ahead and write
-         * more data to the file before all the processes have finished making
-         * it the shorter length, potentially truncating the file and dropping
-         * the new data written)
-         */
-        if(MPI_SUCCESS != (mpi_code = MPI_Barrier(file->comm)))
-            HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_code)
+        if(H5FD_mpi_haddr_to_MPIOff(file->eoa, &needed_eof) < 0)
+            HGOTO_ERROR(H5E_INTERNAL, H5E_BADRANGE, FAIL, "cannot convert from haddr_t to MPI_Offset")
+
+        /* eoa != eof.  Set eof to eoa */
+        if(size != needed_eof) {
+            /* Extend the file's size */
+            if(MPI_SUCCESS != (mpi_code = MPI_File_set_size(file->f, needed_eof)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_File_set_size failed", mpi_code)
+
+            /* In general, we must wait until all processes have finished 
+             * the truncate before any process can continue, since it is 
+             * possible that a process would write at the end of the 
+             * file, and this write would be discarded by the truncate.
+             *
+             * While this is an issue for a user initiated flush, it may 
+             * not be an issue at file close.  If so, we may be able to 
+             * optimize out the following barrier in that case.
+             */
+            if(MPI_SUCCESS != (mpi_code = MPI_Barrier(file->comm)))
+                HMPI_GOTO_ERROR(FAIL, "MPI_Barrier failed", mpi_code)
+        } /* end if */
 
         /* Update the 'last' eoa value */
         file->last_eoa = file->eoa;
diff --git a/src/H5FDmpio.h b/src/H5FDmpio.h
index 858e8ba..6ee0a1a 100644
--- a/src/H5FDmpio.h
+++ b/src/H5FDmpio.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDmulti.c b/src/H5FDmulti.c
index 0ab7fc5..8ae23d2 100644
--- a/src/H5FDmulti.c
+++ b/src/H5FDmulti.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDmulti.h b/src/H5FDmulti.h
index e819e74..0bd5718 100644
--- a/src/H5FDmulti.h
+++ b/src/H5FDmulti.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDpkg.h b/src/H5FDpkg.h
index 45bcfd8..6f47efb 100644
--- a/src/H5FDpkg.h
+++ b/src/H5FDpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -52,10 +50,10 @@
 /******************************/
 /* Package Private Prototypes */
 /******************************/
-H5_DLL haddr_t H5FD_alloc_real(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type,
-    hsize_t size, haddr_t *align_addr, hsize_t *align_size);
-H5_DLL herr_t H5FD_free_real(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type,
-    haddr_t addr, hsize_t size);
+H5_DLL haddr_t H5FD__alloc_real(H5FD_t *file, H5FD_mem_t type, hsize_t size,
+    haddr_t *align_addr, hsize_t *align_size);
+H5_DLL herr_t H5FD_free_real(H5FD_t *file, H5FD_mem_t type, haddr_t addr,
+    hsize_t size);
 
 /* Testing functions */
 #ifdef H5FD_TESTING
diff --git a/src/H5FDprivate.h b/src/H5FDprivate.h
index fb7c43c..0430064 100644
--- a/src/H5FDprivate.h
+++ b/src/H5FDprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -105,30 +103,6 @@ typedef struct H5FD_mpio_fapl_t {
 } H5FD_mpio_fapl_t;
 #endif /* H5_HAVE_PARALLEL */
 
-#ifdef H5_DEBUG_BUILD
-/* Definitions for the internal DXPL types created in H5AC__init_package() */
-typedef enum {
-    H5FD_METADATA_DXPL = 0,
-    H5FD_NOIO_DXPL,
-    H5FD_RAWDATA_DXPL
-} H5FD_dxpl_type_t;
-
-#define H5FD_DXPL_TYPE_NAME              "H5P_dxpl_type"
-#endif /* H5_DEBUG_BUILD */
-
-/* I/O Info for an operation */
-typedef struct H5FD_io_info_t {
-    H5FD_t *file;                       /* File driver object */
-#ifndef H5_DEBUG_BUILD
-    const
-#endif /* H5_DEBUG_BUILD */
-    H5P_genplist_t *meta_dxpl;          /* Metadata DXPL object */
-#ifndef H5_DEBUG_BUILD
-    const
-#endif /* H5_DEBUG_BUILD */
-    H5P_genplist_t *raw_dxpl;           /* Raw data DXPL object */
-} H5FD_io_info_t;
-
 
 /*****************************/
 /* Library Private Variables */
@@ -143,7 +117,7 @@ typedef struct H5FD_io_info_t {
 struct H5F_t;
 
 H5_DLL int H5FD_term_interface(void);
-H5_DLL herr_t H5FD_locate_signature(H5FD_io_info_t *fdio_info, haddr_t *sig_addr);
+H5_DLL herr_t H5FD_locate_signature(H5FD_t *file, haddr_t *sig_addr);
 H5_DLL H5FD_class_t *H5FD_get_class(hid_t id);
 H5_DLL hsize_t H5FD_sb_size(H5FD_t *file);
 H5_DLL herr_t H5FD_sb_encode(H5FD_t *file, char *name/*out*/, uint8_t *buf);
@@ -155,12 +129,13 @@ H5_DLL H5FD_t *H5FD_open(const char *name, unsigned flags, hid_t fapl_id,
 		  haddr_t maxaddr);
 H5_DLL herr_t H5FD_close(H5FD_t *file);
 H5_DLL int H5FD_cmp(const H5FD_t *f1, const H5FD_t *f2);
-H5_DLL haddr_t H5FD_alloc(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, 
+H5_DLL herr_t H5FD_driver_query(const H5FD_class_t *driver, unsigned long *flags/*out*/);
+H5_DLL haddr_t H5FD_alloc(H5FD_t *file, H5FD_mem_t type, 
     struct H5F_t *f, hsize_t size, haddr_t *frag_addr, hsize_t *frag_size);
-H5_DLL herr_t H5FD_free(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, struct H5F_t *f,
+H5_DLL herr_t H5FD_free(H5FD_t *file, H5FD_mem_t type, struct H5F_t *f,
     haddr_t addr, hsize_t size);
 H5_DLL htri_t H5FD_try_extend(H5FD_t *file, H5FD_mem_t type, struct H5F_t *f,
-    hid_t dxpl_id, haddr_t blk_end, hsize_t extra_requested);
+    haddr_t blk_end, hsize_t extra_requested);
 H5_DLL haddr_t H5FD_get_eoa(const H5FD_t *file, H5FD_mem_t type);
 H5_DLL herr_t H5FD_set_eoa(H5FD_t *file, H5FD_mem_t type, haddr_t addr);
 H5_DLL haddr_t H5FD_get_eof(const H5FD_t *file, H5FD_mem_t type);
@@ -168,12 +143,12 @@ H5_DLL haddr_t H5FD_get_maxaddr(const H5FD_t *file);
 H5_DLL herr_t H5FD_get_feature_flags(const H5FD_t *file, unsigned long *feature_flags);
 H5_DLL herr_t H5FD_set_feature_flags(H5FD_t *file, unsigned long feature_flags);
 H5_DLL herr_t H5FD_get_fs_type_map(const H5FD_t *file, H5FD_mem_t *type_map);
-H5_DLL herr_t H5FD_read(H5FD_io_info_t *fdio_info, H5FD_mem_t type,
-    haddr_t addr, size_t size, void *buf/*out*/);
-H5_DLL herr_t H5FD_write(const H5FD_io_info_t *fdio_info, H5FD_mem_t type,
-    haddr_t addr, size_t size, const void *buf);
-H5_DLL herr_t H5FD_flush(H5FD_t *file, hid_t dxpl_id, hbool_t closing);
-H5_DLL herr_t H5FD_truncate(H5FD_t *file, hid_t dxpl_id, hbool_t closing);
+H5_DLL herr_t H5FD_read(H5FD_t *file, H5FD_mem_t type, haddr_t addr,
+    size_t size, void *buf/*out*/);
+H5_DLL herr_t H5FD_write(H5FD_t *file, H5FD_mem_t type, haddr_t addr,
+    size_t size, const void *buf);
+H5_DLL herr_t H5FD_flush(H5FD_t *file, hbool_t closing);
+H5_DLL herr_t H5FD_truncate(H5FD_t *file, hbool_t closing);
 H5_DLL herr_t H5FD_lock(H5FD_t *file, hbool_t rw);
 H5_DLL herr_t H5FD_unlock(H5FD_t *file);
 H5_DLL herr_t H5FD_get_fileno(const H5FD_t *file, unsigned long *filenum);
@@ -194,8 +169,6 @@ H5_DLL herr_t H5FD_mpi_comm_info_free(MPI_Comm *comm, MPI_Info *info);
 H5_DLL herr_t H5FD_mpio_wait_for_left_neighbor(H5FD_t *file);
 H5_DLL herr_t H5FD_mpio_signal_right_neighbor(H5FD_t *file);
 #endif /* NOT_YET */
-H5_DLL herr_t H5FD_mpi_setup_collective(hid_t dxpl_id, MPI_Datatype *btype,
-    MPI_Datatype *ftype);
 H5_DLL herr_t H5FD_set_mpio_atomicity(H5FD_t *file, hbool_t flag);
 H5_DLL herr_t H5FD_get_mpio_atomicity(H5FD_t *file, hbool_t *flag);
 
diff --git a/src/H5FDpublic.h b/src/H5FDpublic.h
index 883b28d..514d1bf 100644
--- a/src/H5FDpublic.h
+++ b/src/H5FDpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -252,6 +250,14 @@ typedef enum H5F_mem_t	H5FD_mem_t;
      * This is specifically used for the multi/split driver.
      */
 #define H5FD_FEAT_PAGED_AGGR		0x00004000
+    /*
+     * Defining H5FD_FEAT_DEFAULT_VFD_COMPATIBLE for a VFL driver
+     * that creates a file which is compatible with the default VFD.
+     * Generally, this means that the VFD creates a single file that follows
+     * the canonical HDF5 file format.
+     */
+#define H5FD_FEAT_DEFAULT_VFD_COMPATIBLE        0x00008000
+
 
 /* Forward declaration */
 typedef struct H5FD_t H5FD_t;
@@ -378,6 +384,9 @@ H5_DLL herr_t H5FDtruncate(H5FD_t *file, hid_t dxpl_id, hbool_t closing);
 H5_DLL herr_t H5FDlock(H5FD_t *file, hbool_t rw);
 H5_DLL herr_t H5FDunlock(H5FD_t *file);
 
+/* Allows querying a VFD ID for features before the file is opened */
+H5_DLL herr_t H5FDdriver_query(hid_t driver_id, unsigned long *flags/*out*/);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/H5FDsec2.c b/src/H5FDsec2.c
index 0ca5efb..32aff0f 100644
--- a/src/H5FDsec2.c
+++ b/src/H5FDsec2.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -343,7 +341,7 @@ H5FD_sec2_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr)
         o_flags |= O_EXCL;
 
     /* Open the file */
-    if((fd = HDopen(name, o_flags, 0666)) < 0) {
+    if((fd = HDopen(name, o_flags, H5_POSIX_CREATE_MODE_RW)) < 0) {
         int myerrno = errno;
         HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file: name = '%s', errno = %d, error message = '%s', flags = %x, o_flags = %x", name, myerrno, HDstrerror(myerrno), flags, (unsigned)o_flags);
     } /* end if */
@@ -529,8 +527,9 @@ H5FD_sec2_query(const H5FD_t *_file, unsigned long *flags /* out */)
         *flags |= H5FD_FEAT_ACCUMULATE_METADATA;    /* OK to accumulate metadata for faster writes                      */
         *flags |= H5FD_FEAT_DATA_SIEVE;             /* OK to perform data sieving for faster raw data reads & writes    */
         *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA;    /* OK to aggregate "small" raw data allocations                     */
-        *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE;    /* VFD handle is POSIX I/O call compatible                          */
+        *flags |= H5FD_FEAT_POSIX_COMPAT_HANDLE;    /* get_handle callback returns a POSIX file descriptor              */
         *flags |= H5FD_FEAT_SUPPORTS_SWMR_IO;       /* VFD supports the single-writer/multiple-readers (SWMR) pattern   */
+        *flags |= H5FD_FEAT_DEFAULT_VFD_COMPATIBLE; /* VFD creates a file which can be opened with the default VFD      */
 
         /* Check for flags that are set by h5repart */
         if(file && file->fam_to_sec2)
diff --git a/src/H5FDsec2.h b/src/H5FDsec2.h
index 0c62597..a4ade0b 100644
--- a/src/H5FDsec2.h
+++ b/src/H5FDsec2.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDspace.c b/src/H5FDspace.c
index 0ad3cf0..e158a44 100644
--- a/src/H5FDspace.c
+++ b/src/H5FDspace.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -35,6 +33,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fprivate.h"         /* File access				*/
 #include "H5FDpkg.h"		/* File Drivers				*/
@@ -101,9 +100,7 @@ H5FL_DEFINE(H5FD_free_t);
 static haddr_t
 H5FD_extend(H5FD_t *file, H5FD_mem_t type, hsize_t size)
 {
-    hsize_t orig_size = size;   /* Original allocation size */
     haddr_t eoa;                /* Address of end-of-allocated space */
-    hsize_t extra;        	/* Extra space to allocate, to align request */
     haddr_t ret_value = HADDR_UNDEF;    /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
@@ -135,7 +132,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5FD_alloc_real
+ * Function:    H5FD__alloc_real
  *
  * Purpose:     Allocate space in the file with the VFD
  *              Note: the handling of alignment is moved up from each driver to
@@ -150,8 +147,8 @@ done:
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5FD_alloc_real(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, hsize_t size, 
-    haddr_t *frag_addr, hsize_t *frag_size)
+H5FD__alloc_real(H5FD_t *file, H5FD_mem_t type, hsize_t size, haddr_t *frag_addr,
+    hsize_t *frag_size)
 {
     hsize_t orig_size = size;   /* Original allocation size */
     haddr_t eoa;                /* Address of end-of-allocated space */
@@ -160,7 +157,7 @@ H5FD_alloc_real(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, hsize_t size,
     hbool_t use_alloc_size;     /* Just pass alloc size to the driver */
     haddr_t ret_value = HADDR_UNDEF;    /* Return value */
 
-    FUNC_ENTER_NOAPI(HADDR_UNDEF)
+    FUNC_ENTER_PACKAGE
 #ifdef H5FD_ALLOC_DEBUG
 HDfprintf(stderr, "%s: type = %u, size = %Hu\n", FUNC, (unsigned)type, size);
 #endif /* H5FD_ALLOC_DEBUG */
@@ -200,7 +197,7 @@ HDfprintf(stderr, "%s: type = %u, size = %Hu\n", FUNC, (unsigned)type, size);
     /* For the multi/split driver: the size passed down to the alloc callback is the original size from H5FD_alloc() */
     /* For all other drivers: the size passed down to the alloc callback is the size + [possibly] alignment size */
     if(file->cls->alloc) {
-        ret_value = (file->cls->alloc)(file, type, dxpl_id, use_alloc_size ? size : size + extra);
+        ret_value = (file->cls->alloc)(file, type, H5CX_get_dxpl(), use_alloc_size ? size : size + extra);
         if(!H5F_addr_defined(ret_value))
             HGOTO_ERROR(H5E_VFL, H5E_NOSPACE, HADDR_UNDEF, "driver allocation request failed")
     } /* end if */
@@ -226,7 +223,7 @@ done:
 HDfprintf(stderr, "%s: ret_value = %a\n", FUNC, ret_value);
 #endif /* H5FD_ALLOC_DEBUG */
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5FD_alloc_real() */
+} /* end H5FD__alloc_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -248,7 +245,7 @@ HDfprintf(stderr, "%s: ret_value = %a\n", FUNC, ret_value);
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5FD_alloc(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, H5F_t *f, hsize_t size,
+H5FD_alloc(H5FD_t *file, H5FD_mem_t type, H5F_t *f, hsize_t size,
     haddr_t *frag_addr, hsize_t *frag_size)
 {
     haddr_t ret_value = HADDR_UNDEF;    /* Return value */
@@ -262,12 +259,12 @@ H5FD_alloc(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, H5F_t *f, hsize_t size,
     HDassert(size > 0);
 
     /* Call the real 'alloc' routine */
-    ret_value = H5FD_alloc_real(file, dxpl_id, type, size, frag_addr, frag_size);
+    ret_value = H5FD__alloc_real(file, type, size, frag_addr, frag_size);
     if(!H5F_addr_defined(ret_value))
         HGOTO_ERROR(H5E_VFL, H5E_CANTALLOC, HADDR_UNDEF, "real 'alloc' request failed")
 
     /* Mark EOA info dirty in cache, so change will get encoded */
-    if(H5F_eoa_dirty(f, dxpl_id) < 0)
+    if(H5F_eoa_dirty(f) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_CANTMARKDIRTY, HADDR_UNDEF, "unable to mark EOA info as dirty")
 
 done:
@@ -289,7 +286,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FD_free_real(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, haddr_t addr, hsize_t size)
+H5FD_free_real(H5FD_t *file, H5FD_mem_t type, haddr_t addr, hsize_t size)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -321,7 +318,7 @@ HDfprintf(stderr, "%s: type = %u, addr = %a, size = %Hu\n", FUNC, (unsigned)type
 #ifdef H5FD_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Letting VFD free space\n", FUNC);
 #endif /* H5FD_ALLOC_DEBUG */
-        if((file->cls->free)(file, type, dxpl_id, addr, size) < 0)
+        if((file->cls->free)(file, type, H5CX_get_dxpl(), addr, size) < 0)
             HGOTO_ERROR(H5E_VFL, H5E_CANTFREE, FAIL, "driver free request failed")
     } /* end if */
     /* Check if this free block is at the end of file allocated space.
@@ -373,8 +370,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FD_free(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, H5F_t *f,
-    haddr_t addr, hsize_t size)
+H5FD_free(H5FD_t *file, H5FD_mem_t type, H5F_t *f, haddr_t addr, hsize_t size)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -387,11 +383,11 @@ H5FD_free(H5FD_t *file, hid_t dxpl_id, H5FD_mem_t type, H5F_t *f,
     HDassert(size > 0);
 
     /* Call the real 'free' routine */
-    if(H5FD_free_real(file, dxpl_id, type, addr, size) < 0)
+    if(H5FD_free_real(file, type, addr, size) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_CANTFREE, FAIL, "real 'free' request failed")
 
     /* Mark EOA info dirty in cache, so change will get encoded */
-    if(H5F_eoa_dirty(f, dxpl_id) < 0)
+    if(H5F_eoa_dirty(f) < 0)
         HGOTO_ERROR(H5E_VFL, H5E_CANTMARKDIRTY, FAIL, "unable to mark EOA info as dirty")
 
 done:
@@ -418,8 +414,8 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5FD_try_extend(H5FD_t *file, H5FD_mem_t type, H5F_t *f, hid_t dxpl_id,
-    haddr_t blk_end, hsize_t extra_requested)
+H5FD_try_extend(H5FD_t *file, H5FD_mem_t type, H5F_t *f, haddr_t blk_end,
+    hsize_t extra_requested)
 {
     haddr_t eoa;                /* End of allocated space in file */
     htri_t ret_value = FALSE;   /* Return value */
@@ -447,7 +443,7 @@ H5FD_try_extend(H5FD_t *file, H5FD_mem_t type, H5F_t *f, hid_t dxpl_id,
             HGOTO_ERROR(H5E_VFL, H5E_CANTEXTEND, FAIL, "driver extend request failed")
 
         /* Mark EOA info dirty in cache, so change will get encoded */
-        if(H5F_eoa_dirty(f, dxpl_id) < 0)
+        if(H5F_eoa_dirty(f) < 0)
             HGOTO_ERROR(H5E_VFL, H5E_CANTMARKDIRTY, FAIL, "unable to mark EOA info as dirty")
 
         /* Indicate success */
diff --git a/src/H5FDstdio.c b/src/H5FDstdio.c
index 13f728e..861c6a6 100644
--- a/src/H5FDstdio.c
+++ b/src/H5FDstdio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Robb Matzke <matzke@llnl.gov>
@@ -557,10 +555,11 @@ H5FD_stdio_query(const H5FD_t *_f, unsigned long /*OUT*/ *flags)
      */
     if(flags) {
         *flags = 0;
-        *flags|=H5FD_FEAT_AGGREGATE_METADATA; /* OK to aggregate metadata allocations */
-        *flags|=H5FD_FEAT_ACCUMULATE_METADATA; /* OK to accumulate metadata for faster writes */
-        *flags|=H5FD_FEAT_DATA_SIEVE;       /* OK to perform data sieving for faster raw data reads & writes */
-        *flags|=H5FD_FEAT_AGGREGATE_SMALLDATA; /* OK to aggregate "small" raw data allocations */
+        *flags |= H5FD_FEAT_AGGREGATE_METADATA;     /* OK to aggregate metadata allocations                             */
+        *flags |= H5FD_FEAT_ACCUMULATE_METADATA;    /* OK to accumulate metadata for faster writes                      */
+        *flags |= H5FD_FEAT_DATA_SIEVE;             /* OK to perform data sieving for faster raw data reads & writes    */
+        *flags |= H5FD_FEAT_AGGREGATE_SMALLDATA;    /* OK to aggregate "small" raw data allocations                     */
+        *flags |= H5FD_FEAT_DEFAULT_VFD_COMPATIBLE; /* VFD creates a file which can be opened with the default VFD      */
     }
 
     return 0;
diff --git a/src/H5FDstdio.h b/src/H5FDstdio.h
index 8281705..f99aacf 100644
--- a/src/H5FDstdio.h
+++ b/src/H5FDstdio.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FDtest.c b/src/H5FDtest.c
index fc9188b..f528dfb 100644
--- a/src/H5FDtest.c
+++ b/src/H5FDtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5FDwindows.c b/src/H5FDwindows.c
index 8dd7555..76c4f18 100644
--- a/src/H5FDwindows.c
+++ b/src/H5FDwindows.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5private.h"      /* Generic Functions        */
diff --git a/src/H5FDwindows.h b/src/H5FDwindows.h
index 7a9d2cf..5cf68a1 100644
--- a/src/H5FDwindows.h
+++ b/src/H5FDwindows.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FL.c b/src/H5FL.c
index db51809..0e67414 100644
--- a/src/H5FL.c
+++ b/src/H5FL.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FLmodule.h b/src/H5FLmodule.h
index cfa585c..48b8d2b 100644
--- a/src/H5FLmodule.h
+++ b/src/H5FLmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FLprivate.h b/src/H5FLprivate.h
index f44d359..4aa44f9 100644
--- a/src/H5FLprivate.h
+++ b/src/H5FLprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5FO.c b/src/H5FO.c
index a77e268..7bbf7fa 100644
--- a/src/H5FO.c
+++ b/src/H5FO.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -210,7 +208,7 @@ done:
  REVISION LOG
 --------------------------------------------------------------------------*/
 herr_t
-H5FO_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr)
+H5FO_delete(H5F_t *f, haddr_t addr)
 {
     H5FO_open_obj_t *open_obj;  /* Information about open object */
     herr_t ret_value=SUCCEED;   /* Return value */
@@ -229,7 +227,7 @@ H5FO_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr)
 
     /* Check if the object was deleted from the file */
     if(open_obj->deleted) {
-        if(H5O_delete(f, dxpl_id, addr) < 0)
+        if(H5O_delete(f, addr) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
     } /* end if */
 
diff --git a/src/H5FOprivate.h b/src/H5FOprivate.h
index 4648f02..49e8126 100644
--- a/src/H5FOprivate.h
+++ b/src/H5FOprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -39,7 +37,7 @@ typedef H5SL_t H5FO_t;       /* Currently, all open objects are stored in skip l
 H5_DLL herr_t H5FO_create(const H5F_t *f);
 H5_DLL void  *H5FO_opened(const H5F_t *f, haddr_t addr);
 H5_DLL herr_t H5FO_insert(const H5F_t *f, haddr_t addr, void *obj, hbool_t delete_flag);
-H5_DLL herr_t H5FO_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr);
+H5_DLL herr_t H5FO_delete(H5F_t *f, haddr_t addr);
 H5_DLL herr_t H5FO_mark(const H5F_t *f, haddr_t addr, hbool_t deleted);
 H5_DLL hbool_t H5FO_marked(const H5F_t *f, haddr_t addr);
 H5_DLL herr_t H5FO_dest(const H5F_t *f);
diff --git a/src/H5FS.c b/src/H5FS.c
index a433fbb..ec2dc11 100644
--- a/src/H5FS.c
+++ b/src/H5FS.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -103,7 +101,7 @@ H5FL_DEFINE(H5FS_t);
  *-------------------------------------------------------------------------
  */
 H5FS_t *
-H5FS_create(H5F_t *f, hid_t dxpl_id, haddr_t *fs_addr, const H5FS_create_t *fs_create,
+H5FS_create(H5F_t *f, haddr_t *fs_addr, const H5FS_create_t *fs_create,
     uint16_t nclasses, const H5FS_section_class_t *classes[], void *cls_init_udata, hsize_t alignment, hsize_t threshold)
 {
     H5FS_t *fspace = NULL;      /* New free space structure */
@@ -140,11 +138,11 @@ HDfprintf(stderr, "%s: Creating free space manager, nclasses = %Zu\n", FUNC, ncl
     /* Check if the free space tracker is supposed to be persistant */
     if(fs_addr) {
         /* Allocate space for the free space header */
-        if(HADDR_UNDEF == (fspace->addr = H5MF_alloc(f, H5FD_MEM_FSPACE_HDR, dxpl_id, (hsize_t)fspace->hdr_size)))
+        if(HADDR_UNDEF == (fspace->addr = H5MF_alloc(f, H5FD_MEM_FSPACE_HDR, (hsize_t)fspace->hdr_size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "file allocation failed for free space header")
 
         /* Cache the new free space header (pinned) */
-        if(H5AC_insert_entry(f, dxpl_id, H5AC_FSPACE_HDR, fspace->addr, fspace, H5AC__PIN_ENTRY_FLAG) < 0)
+        if(H5AC_insert_entry(f, H5AC_FSPACE_HDR, fspace->addr, fspace, H5AC__PIN_ENTRY_FLAG) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTINIT, NULL, "can't add free space header to cache")
 
         /* Return free space header address to caller, if desired */
@@ -186,7 +184,7 @@ HDfprintf(stderr, "%s: Leaving, ret_value = %d\n", FUNC, ret_value);
  *-------------------------------------------------------------------------
  */
 H5FS_t *
-H5FS_open(H5F_t *f, hid_t dxpl_id, haddr_t fs_addr, uint16_t nclasses,
+H5FS_open(H5F_t *f, haddr_t fs_addr, uint16_t nclasses,
     const H5FS_section_class_t *classes[], void *cls_init_udata, hsize_t alignment, hsize_t threshold)
 {
     H5FS_t *fspace = NULL;              /* New free space structure */
@@ -211,7 +209,7 @@ HDfprintf(stderr, "%s: Opening free space manager, fs_addr = %a, nclasses = %Zu\
     cache_udata.addr = fs_addr;
 
     /* Protect the free space header */
-    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_HDR, fs_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, H5AC_FSPACE_HDR, fs_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTPROTECT, NULL, "unable to load free space header")
 #ifdef H5FS_DEBUG
 HDfprintf(stderr, "%s: fspace->sect_addr = %a\n", FUNC, fspace->sect_addr);
@@ -230,7 +228,7 @@ HDfprintf(stderr, "%s: fspace->rc = %u\n", FUNC, fspace->rc);
     fspace->align_thres = threshold;
 
     /* Unlock free space header */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_unprotect(f, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTUNPROTECT, NULL, "unable to release free space header")
 
     /* Set return value */
@@ -254,7 +252,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_delete(H5F_t *f, hid_t dxpl_id, haddr_t fs_addr)
+H5FS_delete(H5F_t *f, haddr_t fs_addr)
 {
     H5FS_t *fspace = NULL;              /* Free space header loaded from file */
     H5FS_hdr_cache_ud_t cache_udata; /* User-data for metadata cache callback */
@@ -322,7 +320,7 @@ HDfprintf(stderr, "%s: Deleting free space manager, fs_addr = %a\n", FUNC, fs_ad
 #endif /* H5FS_DEBUG */
 
     /* Protect the free space header */
-    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_HDR, fs_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, H5AC_FSPACE_HDR, fs_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTPROTECT, FAIL, "unable to protect free space header")
 
     /* Sanity check */
@@ -363,7 +361,7 @@ HDfprintf(stderr, "%s: Expunging free space section info from cache\n", FUNC);
                 if (!H5F_IS_TMP_ADDR(f, fspace->sect_addr))
                     cache_flags |= H5AC__FREE_FILE_SPACE_FLAG;
 
-                if(H5AC_expunge_entry(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, cache_flags) < 0)
+                if(H5AC_expunge_entry(f, H5AC_FSPACE_SINFO, fspace->sect_addr, cache_flags) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "unable to remove free space section info from cache")
             } /* end block */
 
@@ -376,15 +374,14 @@ HDfprintf(stderr, "%s: Done expunging free space section info from cache\n", FUN
 HDfprintf(stderr, "%s: Deleting free space section info from file\n", FUNC);
 #endif /* H5FS_DEBUG */
             /* Release the space in the file */
-            if(!H5F_IS_TMP_ADDR(f, fspace->sect_addr)) {
-                if(H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_addr, fspace->alloc_sect_size) < 0)
+            if(!H5F_IS_TMP_ADDR(f, fspace->sect_addr))
+                if(H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, fspace->sect_addr, fspace->alloc_sect_size) < 0)
                     HGOTO_ERROR(H5E_FSPACE, H5E_CANTFREE, FAIL, "unable to release free space sections")
-            } /* end if */
         } /* end else */
     } /* end if */
 
 done:
-    if(fspace && H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+    if(fspace && H5AC_unprotect(f, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTUNPROTECT, FAIL, "unable to release free space header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -405,7 +402,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_close(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace)
+H5FS_close(H5F_t *f, H5FS_t *fspace)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -443,7 +440,7 @@ HDfprintf(stderr, "%s: Real sections to store in file\n", FUNC);
                             HGOTO_ERROR(H5E_FSPACE, H5E_NOSPACE, FAIL, "file allocation failed for free space sections")
                     } /* end if */
                     else {
-                        if(HADDR_UNDEF == (fspace->sect_addr = H5MF_alloc(f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_size)))
+                        if(HADDR_UNDEF == (fspace->sect_addr = H5MF_alloc(f, H5FD_MEM_FSPACE_SINFO, fspace->sect_size)))
                             HGOTO_ERROR(H5E_FSPACE, H5E_NOSPACE, FAIL, "file allocation failed for free space sections")
                     } /* end if */
                     fspace->alloc_sect_size = (size_t)fspace->sect_size;
@@ -458,7 +455,7 @@ HDfprintf(stderr, "%s: Real sections to store in file\n", FUNC);
                 HDassert(H5F_addr_defined(fspace->sect_addr));
 
             /* Cache the free space section info */
-            if(H5AC_insert_entry(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_insert_entry(f, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_CANTINIT, FAIL, "can't add free space sections to cache")
         } /* end if */
         else {
@@ -500,7 +497,7 @@ HDfprintf(stderr, "%s: Section info in temp. address space went 'go away'\n", FU
                             HGOTO_ERROR(H5E_FSPACE, H5E_CANTMARKDIRTY, FAIL, "unable to mark free space header as dirty")
                     } /* end if */
                     else {
-                        if((status = H5MF_try_shrink(f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_addr, fspace->alloc_sect_size)) < 0)
+                        if((status = H5MF_try_shrink(f, H5FD_MEM_FSPACE_SINFO, fspace->sect_addr, fspace->alloc_sect_size)) < 0)
                             HGOTO_ERROR(H5E_FSPACE, H5E_CANTMERGE, FAIL, "can't check for absorbing section info")
                         else if(status == FALSE) {
                             /* Section info can't "go away", but it's free.  Allow
@@ -541,7 +538,7 @@ HDfprintf(stderr, "%s: Section info is NOT for file free space\n", FUNC);
 
                     /* Free previous serialized sections disk space */
                     if(!H5F_IS_TMP_ADDR(f, old_sect_addr)) {
-                        if(H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, dxpl_id, old_sect_addr, old_alloc_sect_size) < 0)
+                        if(H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, old_sect_addr, old_alloc_sect_size) < 0)
                             HGOTO_ERROR(H5E_FSPACE, H5E_CANTFREE, FAIL, "unable to free free space sections")
                     } /* end if */
                 } /* end else */
@@ -821,7 +818,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_alloc_hdr(H5F_t *f, H5FS_t *fspace, haddr_t *fs_addr, hid_t dxpl_id)
+H5FS_alloc_hdr(H5F_t *f, H5FS_t *fspace, haddr_t *fs_addr)
 {
     herr_t  ret_value = SUCCEED;              /* Return value */
 
@@ -833,11 +830,11 @@ H5FS_alloc_hdr(H5F_t *f, H5FS_t *fspace, haddr_t *fs_addr, hid_t dxpl_id)
 
     if(!H5F_addr_defined(fspace->addr)) {
         /* Allocate space for the free space header */
-        if(HADDR_UNDEF == (fspace->addr = H5MF_alloc(f, H5FD_MEM_FSPACE_HDR, dxpl_id, (hsize_t)H5FS_HEADER_SIZE(f))))
+        if(HADDR_UNDEF == (fspace->addr = H5MF_alloc(f, H5FD_MEM_FSPACE_HDR, (hsize_t)H5FS_HEADER_SIZE(f))))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for free space header")
 
         /* Cache the new free space header (pinned) */
-        if(H5AC_insert_entry(f, dxpl_id, H5AC_FSPACE_HDR, fspace->addr, fspace, H5AC__PIN_ENTRY_FLAG) < 0)
+        if(H5AC_insert_entry(f, H5AC_FSPACE_HDR, fspace->addr, fspace, H5AC__PIN_ENTRY_FLAG) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTINIT, FAIL, "can't add free space header to cache")
     } /* end if */
 
@@ -862,7 +859,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_alloc_sect(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id)
+H5FS_alloc_sect(H5F_t *f, H5FS_t *fspace)
 {
     herr_t  ret_value = SUCCEED;              /* Return value */
 
@@ -873,7 +870,7 @@ H5FS_alloc_sect(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id)
     HDassert(fspace);
 
     if(!H5F_addr_defined(fspace->sect_addr) && fspace->sinfo && fspace->serial_sect_count > 0) {
-        if(HADDR_UNDEF == (fspace->sect_addr = H5MF_alloc(f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_size)))
+        if(HADDR_UNDEF == (fspace->sect_addr = H5MF_alloc(f, H5FD_MEM_FSPACE_SINFO, fspace->sect_size)))
             HGOTO_ERROR(H5E_FSPACE, H5E_NOSPACE, FAIL, "file allocation failed for section info")
         fspace->alloc_sect_size = fspace->sect_size;
 
@@ -882,7 +879,7 @@ H5FS_alloc_sect(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTMARKDIRTY, FAIL, "unable to mark free space header as dirty")
 
         /* Cache the free-space section info */
-        if(H5AC_insert_entry(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_insert_entry(f, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTINIT, FAIL, "can't add free space sections to cache")
 
         /* Since space has been allocated for the section info and the sinfo
@@ -910,7 +907,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_free(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id, hbool_t free_file_space)
+H5FS_free(H5F_t *f, H5FS_t *fspace, hbool_t free_file_space)
 {
     haddr_t	saved_addr;             /* Previous address of item */
     unsigned    cache_flags;        /* Flags for unprotecting cache entries */
@@ -939,13 +936,12 @@ H5FS_free(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id, hbool_t free_file_space)
 
             /* Protect the free space sections */
             cache_udata.f = f;
-            cache_udata.dxpl_id = dxpl_id;
             cache_udata.fspace = fspace;
-	    if(NULL == (fspace->sinfo = (H5FS_sinfo_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+	    if(NULL == (fspace->sinfo = (H5FS_sinfo_t *)H5AC_protect(f, H5AC_FSPACE_SINFO, fspace->sect_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 		HGOTO_ERROR(H5E_FSPACE, H5E_CANTPROTECT, FAIL, "unable to protect free space section info")
 
             /* Unload and release ownership of the free-space manager section info */
-            if(H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, cache_flags) < 0)
+            if(H5AC_unprotect(f, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, cache_flags) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_CANTUNPROTECT, FAIL, "unable to release free space section info")
         } /* end if */
 
@@ -958,7 +954,7 @@ H5FS_free(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id, hbool_t free_file_space)
         /* Free space for the free-space manager section info */
         if(!H5F_IS_TMP_ADDR(f, saved_addr)) {
             if(free_file_space &&
-               H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, dxpl_id, saved_addr, saved_size) < 0)
+               H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, saved_addr, saved_size) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_CANTFREE, FAIL, "unable to release free space sections")
         } /* end if */
 
@@ -984,7 +980,7 @@ H5FS_free(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id, hbool_t free_file_space)
             cache_udata.nclasses = 0;
             cache_udata.classes = NULL;
             cache_udata.cls_init_udata = NULL;
-	    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_HDR, fspace->addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+	    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, H5AC_FSPACE_HDR, fspace->addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 		HGOTO_ERROR(H5E_FSPACE, H5E_CANTPROTECT, FAIL, "unable to protect free space section info")
 
             /* Unpin the free-space manager header */
@@ -992,7 +988,7 @@ H5FS_free(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id, hbool_t free_file_space)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPIN, FAIL, "unable to unpin fractal heap header")
 
             /* Unload and release ownership of the free-space header */
-            if(H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_HDR, fspace->addr, fspace, cache_flags) < 0)
+            if(H5AC_unprotect(f, H5AC_FSPACE_HDR, fspace->addr, fspace, cache_flags) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_CANTUNPROTECT, FAIL, "unable to release free space section info")
         } /* end if */
 
@@ -1001,7 +997,7 @@ H5FS_free(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id, hbool_t free_file_space)
 
         /* Free space for the free-space manager header */
         if(free_file_space &&
-           H5MF_xfree(f, H5FD_MEM_FSPACE_HDR, dxpl_id, saved_addr, (hsize_t)H5FS_HEADER_SIZE(f)) < 0)
+           H5MF_xfree(f, H5FD_MEM_FSPACE_HDR, saved_addr, (hsize_t)H5FS_HEADER_SIZE(f)) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTFREE, FAIL, "unable to free free space header")
     } /* end if */
 
@@ -1195,7 +1191,7 @@ H5FS_get_sect_count(const H5FS_t *frsp, hsize_t *tot_sect_count)
 #ifdef H5FS_DEBUG_ASSERT
 
 /*-------------------------------------------------------------------------
- * Function:    H5FS_assert
+ * Function:    H5FS__assert
  *
  * Purpose:     Verify that the free space manager is mostly sane
  *
@@ -1207,17 +1203,17 @@ H5FS_get_sect_count(const H5FS_t *frsp, hsize_t *tot_sect_count)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_assert(const H5FS_t *fspace, hid_t dxpl_id)
+H5FS__assert(const H5FS_t *fspace)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_PACKAGE_NOERR
 #ifdef QAK
-HDfprintf(stderr, "%s: fspace->tot_sect_count = %Hu\n", "H5FS_assert", fspace->tot_sect_count);
+HDfprintf(stderr, "%s: fspace->tot_sect_count = %Hu\n", "H5FS__assert", fspace->tot_sect_count);
 #endif /* QAK */
 
     /* Checks for section info, if it's available */
     if(fspace->sinfo) {
         /* Sanity check sections */
-        H5FS_sect_assert(fspace, dxpl_id);
+        H5FS__sect_assert(fspace);
 
         /* General assumptions about the section size counts */
         HDassert(fspace->sinfo->tot_size_count >= fspace->sinfo->serial_size_count);
@@ -1233,6 +1229,6 @@ HDfprintf(stderr, "%s: fspace->tot_sect_count = %Hu\n", "H5FS_assert", fspace->t
 #endif /* QAK */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5FS_assert() */
+} /* end H5FS__assert() */
 #endif /* H5FS_DEBUG_ASSERT */
 
diff --git a/src/H5FScache.c b/src/H5FScache.c
index ddc66fd..875a383 100644
--- a/src/H5FScache.c
+++ b/src/H5FScache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -84,9 +82,8 @@ static htri_t H5FS__cache_hdr_verify_chksum(const void *image_ptr, size_t len, v
 static void *H5FS__cache_hdr_deserialize(const void *image, size_t len,
     void *udata, hbool_t *dirty);
 static herr_t H5FS__cache_hdr_image_len(const void *thing, size_t *image_len);
-static herr_t H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id,
-    void *thing, haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len,
-    unsigned *flags);
+static herr_t H5FS__cache_hdr_pre_serialize(H5F_t *f, void *thing, haddr_t addr,
+    size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags);
 static herr_t H5FS__cache_hdr_serialize(const H5F_t *f, void *image, 
     size_t len, void *thing);
 static herr_t H5FS__cache_hdr_notify(H5AC_notify_action_t action, void *thing);
@@ -97,9 +94,8 @@ static htri_t H5FS__cache_sinfo_verify_chksum(const void *image_ptr, size_t len,
 static void *H5FS__cache_sinfo_deserialize(const void *image, size_t len,
     void *udata, hbool_t *dirty);
 static herr_t H5FS__cache_sinfo_image_len(const void *thing, size_t *image_len);
-static herr_t H5FS__cache_sinfo_pre_serialize(H5F_t *f, hid_t dxpl_id,
-    void *thing, haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len,
-    unsigned *flags);
+static herr_t H5FS__cache_sinfo_pre_serialize(H5F_t *f, void *thing,
+    haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags);
 static herr_t H5FS__cache_sinfo_serialize(const H5F_t *f, void *image,
     size_t len, void *thing);
 static herr_t H5FS__cache_sinfo_notify(H5AC_notify_action_t action, void *thing);
@@ -406,12 +402,11 @@ H5FS__cache_hdr_image_len(const void *_thing, size_t *image_len)
  *-------------------------------------------------------------------------
  */
 static herr_t 
-H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
+H5FS__cache_hdr_pre_serialize(H5F_t *f, void *_thing,
     haddr_t addr, size_t H5_ATTR_UNUSED len, haddr_t *new_addr, size_t *new_len,
     unsigned *flags)
 {
     H5FS_t 	*fspace = (H5FS_t *)_thing;     /* Pointer to the object */
-    H5P_genplist_t *dxpl = NULL;                /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
     herr_t     	 ret_value = SUCCEED;           /* Return value */
 
@@ -434,9 +429,8 @@ H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
         if(H5AC_get_entry_ring(f, addr, &ring) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "unable to get property value");
 
-        /* Set the ring type for the section info in the DXPL */
-        if(H5AC_set_ring(dxpl_id, ring, &dxpl, &orig_ring) < 0)
-            HGOTO_ERROR(H5E_FSPACE, H5E_CANTSET, FAIL, "unable to set ring value")
+        /* Set the ring type for the section info in the API context */
+        H5AC_set_ring(ring, &orig_ring);
 
         /* This implies that the header "owns" the section info.  
          *
@@ -526,7 +520,7 @@ H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
                 /* allocate file space for the section info, and insert it
                  * into the metadata cache.
                  */
-                if(HADDR_UNDEF == (fspace->sect_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_size)))
+                if(HADDR_UNDEF == (fspace->sect_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, fspace->sect_size)))
                     HGOTO_ERROR(H5E_FSPACE, H5E_NOSPACE, FAIL, "file allocation failed for free space sections")
 
                 fspace->alloc_sect_size = (size_t)fspace->sect_size;
@@ -534,10 +528,10 @@ H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
                 /* Get the tag for this free space manager and use it to insert the entry */
                 if(H5AC_get_tag((const void *)fspace, &tag) < 0)
                     HGOTO_ERROR(H5E_FSPACE, H5E_CANTTAG, FAIL, "can't get tag for metadata cache object")
-                H5_BEGIN_TAG(dxpl_id, tag, FAIL)
-                if(H5AC_insert_entry((H5F_t *)f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
+                H5_BEGIN_TAG(tag)
+                if(H5AC_insert_entry((H5F_t *)f, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR_TAG(H5E_FSPACE, H5E_CANTINIT, FAIL, "can't add free space sections to cache")
-                H5_END_TAG(FAIL)
+                H5_END_TAG
 
                 HDassert(fspace->sinfo->cache_info.size == fspace->alloc_sect_size);
 
@@ -561,14 +555,14 @@ H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
                 HDassert(fspace->alloc_sect_size == (size_t)fspace->sect_size);
 
                 /* Allocate space for the section info in file */
-                if(HADDR_UNDEF == (new_sect_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_size)))
+                if(HADDR_UNDEF == (new_sect_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, fspace->sect_size)))
                     HGOTO_ERROR(H5E_FSPACE, H5E_NOSPACE, FAIL, "file allocation failed for free space sections")
 
                 fspace->alloc_sect_size = (size_t)fspace->sect_size;
                 HDassert(fspace->sinfo->cache_info.size == fspace->alloc_sect_size);
 
                 /* Let the metadata cache know the section info moved */
-                if(H5AC_move_entry((H5F_t *)f, H5AC_FSPACE_SINFO, fspace->sect_addr, new_sect_addr, dxpl_id) < 0)
+                if(H5AC_move_entry((H5F_t *)f, H5AC_FSPACE_SINFO, fspace->sect_addr, new_sect_addr) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTMOVE, FAIL, "unable to move section info")
 
                 fspace->sect_addr = new_sect_addr;
@@ -623,7 +617,7 @@ H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
             HDassert((sect_status & H5AC_ES__IS_PINNED) == 0);
 
             /* Allocate space for the section info in file */
-            if(HADDR_UNDEF == (new_sect_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_size)))
+            if(HADDR_UNDEF == (new_sect_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, fspace->sect_size)))
                 HGOTO_ERROR(H5E_FSPACE, H5E_NOSPACE, FAIL, "file allocation failed for free space sections")
 
             fspace->alloc_sect_size = (size_t)fspace->sect_size;
@@ -632,7 +626,7 @@ H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
             HDassert(!H5F_addr_eq(fspace->sect_addr, new_sect_addr));
 
             /* Let the metadata cache know the section info moved */
-            if(H5AC_move_entry((H5F_t *)f, H5AC_FSPACE_SINFO, fspace->sect_addr, new_sect_addr, dxpl_id) < 0)
+            if(H5AC_move_entry((H5F_t *)f, H5AC_FSPACE_SINFO, fspace->sect_addr, new_sect_addr) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_CANTMOVE, FAIL, "unable to move section info")
 
             /* Update the internal address for the section info */
@@ -653,9 +647,9 @@ H5FS__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
     *flags = 0;
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_FSPACE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5FS__cache_hdr_pre_serialize() */
@@ -991,7 +985,7 @@ H5FS__cache_sinfo_deserialize(const void *_image, size_t len, void *_udata,
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* initialize old_sect_size */
-    H5_CHECKED_ASSIGN(old_sect_size, size_t, udata->fspace->sect_size, hsize_t);
+    H5_CHECKED_ASSIGN(old_sect_size, size_t, fspace->sect_size, hsize_t);
 
     /* Magic number */
     if(HDmemcmp(image, H5FS_SINFO_MAGIC, (size_t)H5_SIZEOF_MAGIC))
@@ -1004,7 +998,7 @@ H5FS__cache_sinfo_deserialize(const void *_image, size_t len, void *_udata,
 
     /* Address of free space header for these sections */
     H5F_addr_decode(udata->f, &image, &fs_addr);
-    if(H5F_addr_ne(fs_addr, udata->fspace->addr))
+    if(H5F_addr_ne(fs_addr, fspace->addr))
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTLOAD, NULL, "incorrect header address for free space sections")
 
     /* Check for any serialized sections */
@@ -1016,7 +1010,7 @@ H5FS__cache_sinfo_deserialize(const void *_image, size_t len, void *_udata,
         unsigned sect_cnt_size;         /* The size of the section size counts */
 
         /* Compute the size of the section counts */
-        sect_cnt_size = H5VM_limit_enc_size((uint64_t)udata->fspace->serial_sect_count);
+        sect_cnt_size = H5VM_limit_enc_size((uint64_t)fspace->serial_sect_count);
 
         /* Reset the section count, the "add" routine will update it */
         old_tot_sect_count = fspace->tot_sect_count;
@@ -1057,16 +1051,16 @@ H5FS__cache_sinfo_deserialize(const void *_image, size_t len, void *_udata,
 
                 /* Call 'deserialize' callback for this section */
                 des_flags = 0;
-                HDassert(udata->fspace->sect_cls[sect_type].deserialize);
-                if(NULL == (new_sect = (*fspace->sect_cls[sect_type].deserialize) (&fspace->sect_cls[sect_type], udata->dxpl_id, image, sect_addr, sect_size, &des_flags)))
+                HDassert(fspace->sect_cls[sect_type].deserialize);
+                if(NULL == (new_sect = (*fspace->sect_cls[sect_type].deserialize) (&fspace->sect_cls[sect_type], image, sect_addr, sect_size, &des_flags)))
                     HGOTO_ERROR(H5E_FSPACE, H5E_CANTDECODE, NULL, "can't deserialize section")
 
                 /* Update offset in serialization image */
-                image += udata->fspace->sect_cls[sect_type].serial_size;
+                image += fspace->sect_cls[sect_type].serial_size;
 
                 /* Insert section in free space manager, unless requested not to */
                 if(!(des_flags & H5FS_DESERIALIZE_NO_ADD))
-                    if(H5FS_sect_add(udata->f, udata->dxpl_id, udata->fspace, new_sect, H5FS_ADD_DESERIALIZING, udata) < 0)
+                    if(H5FS_sect_add(udata->f, fspace, new_sect, H5FS_ADD_DESERIALIZING, udata) < 0)
                         HGOTO_ERROR(H5E_FSPACE, H5E_CANTINSERT, NULL, "can't add section to free space manager")
             } /* end for */
         } while(image < (((const uint8_t *)_image + old_sect_size) - H5FS_SIZEOF_CHKSUM));
@@ -1156,8 +1150,8 @@ H5FS__cache_sinfo_image_len(const void *_thing, size_t *image_len)
  *-------------------------------------------------------------------------
  */
 static herr_t 
-H5FS__cache_sinfo_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
-    haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags)
+H5FS__cache_sinfo_pre_serialize(H5F_t *f, void *_thing, haddr_t addr,
+    size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags)
 {
     H5FS_sinfo_t 	*sinfo = (H5FS_sinfo_t *)_thing;        /* Pointer to the object */
     H5FS_t 		*fspace;                /* Free space header */
@@ -1195,7 +1189,7 @@ H5FS__cache_sinfo_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
         HDassert(H5F_addr_eq(fspace->sect_addr, addr));
 
         /* Allocate space for the section info in file */
-        if(HADDR_UNDEF == (sinfo_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, dxpl_id, fspace->sect_size)))
+        if(HADDR_UNDEF == (sinfo_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FSPACE_SINFO, fspace->sect_size)))
             HGOTO_ERROR(H5E_FSPACE, H5E_NOSPACE, FAIL, "file allocation failed for free space sections")
 
         fspace->alloc_sect_size = (size_t)fspace->sect_size;
@@ -1204,7 +1198,7 @@ H5FS__cache_sinfo_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
         HDassert(!H5F_addr_eq(sinfo->fspace->sect_addr, sinfo_addr));
 
         /* Let the metadata cache know the section info moved */
-        if(H5AC_move_entry((H5F_t *)f, H5AC_FSPACE_SINFO, sinfo->fspace->sect_addr, sinfo_addr, dxpl_id) < 0)
+        if(H5AC_move_entry((H5F_t *)f, H5AC_FSPACE_SINFO, sinfo->fspace->sect_addr, sinfo_addr) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTMOVE, FAIL, "unable to move section info")
 
         /* Update the internal address for the section info */
diff --git a/src/H5FSdbg.c b/src/H5FSdbg.c
index fbdeb70..c615b68 100644
--- a/src/H5FSdbg.c
+++ b/src/H5FSdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -91,7 +89,7 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth)
+H5FS_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth)
 {
     H5FS_t      *fspace = NULL;         /* Free space header info */
     H5FS_hdr_cache_ud_t cache_udata;    /* User-data for cache callback */
@@ -118,7 +116,7 @@ H5FS_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int
     /*
      * Load the free space header.
      */
-    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_HDR, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, H5AC_FSPACE_HDR, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTLOAD, FAIL, "unable to load free space header")
 
     /* Print opening message */
@@ -169,7 +167,7 @@ H5FS_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int
         fspace->alloc_sect_size);
 
 done:
-    if(fspace && H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_HDR, addr, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(fspace && H5AC_unprotect(f, H5AC_FSPACE_HDR, addr, fspace, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_PROTECT, FAIL, "unable to release free space header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -227,7 +225,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *stream, int indent, int fwidth,
+H5FS_sects_debug(H5F_t *f, haddr_t H5_ATTR_UNUSED addr, FILE *stream, int indent, int fwidth,
     haddr_t fs_addr, haddr_t client_addr)
 {
     H5FS_t	    *fspace = NULL;         /* Free space header info */
@@ -258,7 +256,7 @@ H5FS_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *str
     /*
      * Load the free space header.
      */
-    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_HDR, fs_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (fspace = (H5FS_t *)H5AC_protect(f, H5AC_FSPACE_HDR, fs_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTLOAD, FAIL, "unable to load free space header")
 
     /* Retrieve the client id */
@@ -268,7 +266,7 @@ H5FS_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *str
     /* (set the "deleted" flag for the unprotect, so the cache entry is removed
      *  and reloaded later, with the correct client information -QAK)
      */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__DELETED_FLAG) < 0)
+    if(H5AC_unprotect(f, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__DELETED_FLAG) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_PROTECT, FAIL, "unable to release free space header")
     fspace = NULL;
 
@@ -280,12 +278,12 @@ H5FS_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *str
      */
     switch(client) {
         case H5FS_CLIENT_FHEAP_ID:
-            if(H5HF_sects_debug(f, dxpl_id, client_addr, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
+            if(H5HF_sects_debug(f, client_addr, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_SYSTEM, FAIL, "unable to dump fractal heap free space sections")
             break;
 
         case H5FS_CLIENT_FILE_ID:
-            if(H5MF_sects_debug(f, dxpl_id, fs_addr, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
+            if(H5MF_sects_debug(f, fs_addr, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_SYSTEM, FAIL, "unable to dump file free space sections")
             break;
 
@@ -296,7 +294,7 @@ H5FS_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t H5_ATTR_UNUSED addr, FILE *str
     } /* end switch */
 
 done:
-    if(fspace && H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(fspace && H5AC_unprotect(f, H5AC_FSPACE_HDR, fs_addr, fspace, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_PROTECT, FAIL, "unable to release free space header")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5FSint.c b/src/H5FSint.c
index 60cedd5..264950d 100644
--- a/src/H5FSint.c
+++ b/src/H5FSint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -79,6 +77,31 @@
 /*******************/
 
 
+/*-------------------------------------------------------------------------
+ * Function:    H5FS_init
+ *
+ * Purpose:     Initialize the interface in case it is unable to initialize
+ *              itself soon enough.
+ *
+ * Return:      Success:    non-negative
+ *              Failure:    negative
+ *
+ * Programmer:  Quincey Koziol
+ *              Saturday, March 4, 2000
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5FS_init(void)
+{
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_NOAPI_NOERR
+    /* FUNC_ENTER() does all the work */
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5FS_init() */
+
 
 /*-------------------------------------------------------------------------
  * Function:    H5FS__create_flush_depend
diff --git a/src/H5FSmodule.h b/src/H5FSmodule.h
index b435b79..b2869dd 100644
--- a/src/H5FSmodule.h
+++ b/src/H5FSmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FSpkg.h b/src/H5FSpkg.h
index ab97955..23e1212 100644
--- a/src/H5FSpkg.h
+++ b/src/H5FSpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -106,7 +104,6 @@ typedef struct H5FS_hdr_cache_ud_t {
 typedef struct H5FS_sinfo_cache_ud_t {
     H5F_t *f;                  /* File that free space section info is within */
     H5FS_t *fspace;            /* free space manager */
-    hid_t dxpl_id;
 } H5FS_sinfo_cache_ud_t;
 
 /* Free space section bin info */
@@ -239,8 +236,8 @@ H5_DLL herr_t H5FS_sinfo_dest(H5FS_sinfo_t *sinfo);
 
 /* Sanity check routines */
 #ifdef H5FS_DEBUG
-H5_DLL herr_t H5FS_assert(const H5FS_t *fspace, hid_t dxpl_id);
-H5_DLL herr_t H5FS_sect_assert(const H5FS_t *fspace, hid_t dxpl_id);
+H5_DLL herr_t H5FS__assert(const H5FS_t *fspace);
+H5_DLL herr_t H5FS__sect_assert(const H5FS_t *fspace);
 #endif /* H5FS_DEBUG */
 
 /* Testing routines */
diff --git a/src/H5FSprivate.h b/src/H5FSprivate.h
index 74f9dcb..de1b4c1 100644
--- a/src/H5FSprivate.h
+++ b/src/H5FSprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -106,13 +104,13 @@ typedef struct H5FS_section_class_t {
     /* Object methods */
     herr_t (*add)(H5FS_section_info_t **, unsigned *, void *);       /* Routine called when section is about to be added to manager */
     herr_t (*serialize)(const struct H5FS_section_class_t *, const H5FS_section_info_t *, uint8_t *);        /* Routine to serialize a "live" section into a buffer */
-    H5FS_section_info_t *(*deserialize)(const struct H5FS_section_class_t *, hid_t dxpl_id, const uint8_t *, haddr_t, hsize_t, unsigned *);     /* Routine to deserialize a buffer into a "live" section */
+    H5FS_section_info_t *(*deserialize)(const struct H5FS_section_class_t *, const uint8_t *, haddr_t, hsize_t, unsigned *);     /* Routine to deserialize a buffer into a "live" section */
     htri_t (*can_merge)(const H5FS_section_info_t *, const H5FS_section_info_t *, void *);  /* Routine to determine if two nodes are mergable */
     herr_t (*merge)(H5FS_section_info_t **, H5FS_section_info_t *, void *);      /* Routine to merge two nodes */
     htri_t (*can_shrink)(const H5FS_section_info_t *, void *);        /* Routine to determine if node can shrink container */
     herr_t (*shrink)(H5FS_section_info_t **, void *);   /* Routine to shrink container */
     herr_t (*free)(H5FS_section_info_t *);              /* Routine to free node */
-    herr_t (*valid)(const struct H5FS_section_class_t *, const H5FS_section_info_t *, hid_t dxpl_id);   /* Routine to check if a section is valid */
+    herr_t (*valid)(const struct H5FS_section_class_t *, const H5FS_section_info_t *);   /* Routine to check if a section is valid */
     H5FS_section_info_t *(*split)(H5FS_section_info_t *, hsize_t);     /* Routine to create the split section */
     herr_t (*debug)(const H5FS_section_info_t *, FILE *, int , int );   /* Routine to dump debugging information about a section */
 } H5FS_section_class_t;
@@ -177,37 +175,39 @@ H5FL_SEQ_EXTERN(H5FS_section_class_t);
 /* Library-private Function Prototypes */
 /***************************************/
 
+/* Package initialization routine */
+H5_DLL herr_t H5FS_init(void);
+
 /* Free space manager routines */
-H5_DLL H5FS_t *H5FS_create(H5F_t *f, hid_t dxpl_id, haddr_t *fs_addr,
-    const H5FS_create_t *fs_create, uint16_t nclasses,
-    const H5FS_section_class_t *classes[], void *cls_init_udata, hsize_t alignment, hsize_t threshold);
-H5_DLL H5FS_t *H5FS_open(H5F_t *f, hid_t dxpl_id, haddr_t fs_addr,
-    uint16_t nclasses, const H5FS_section_class_t *classes[], void *cls_init_udata, hsize_t alignment, hsize_t threshold);
+H5_DLL H5FS_t *H5FS_create(H5F_t *f, haddr_t *fs_addr, const H5FS_create_t *fs_create,
+    uint16_t nclasses, const H5FS_section_class_t *classes[],
+    void *cls_init_udata, hsize_t alignment, hsize_t threshold);
+H5_DLL H5FS_t *H5FS_open(H5F_t *f, haddr_t fs_addr, uint16_t nclasses,
+    const H5FS_section_class_t *classes[], void *cls_init_udata, hsize_t alignment,
+    hsize_t threshold);
 H5_DLL herr_t H5FS_size(const H5F_t *f, const H5FS_t *fspace, hsize_t *meta_size);
-H5_DLL herr_t H5FS_delete(H5F_t *f, hid_t dxpl_id, haddr_t fs_addr);
-H5_DLL herr_t H5FS_close(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace);
-H5_DLL herr_t H5FS_alloc_hdr(H5F_t *f, H5FS_t *fspace, haddr_t *fs_addr, hid_t dxpl_id);
-H5_DLL herr_t H5FS_alloc_sect(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id);
-H5_DLL herr_t H5FS_free(H5F_t *f, H5FS_t *fspace, hid_t dxpl_id, 
-    hbool_t free_file_space);
+H5_DLL herr_t H5FS_delete(H5F_t *f, haddr_t fs_addr);
+H5_DLL herr_t H5FS_close(H5F_t *f, H5FS_t *fspace);
+H5_DLL herr_t H5FS_alloc_hdr(H5F_t *f, H5FS_t *fspace, haddr_t *fs_addr);
+H5_DLL herr_t H5FS_alloc_sect(H5F_t *f, H5FS_t *fspace);
+H5_DLL herr_t H5FS_free(H5F_t *f, H5FS_t *fspace, hbool_t free_file_space);
 
 /* Free space section routines */
-H5_DLL herr_t H5FS_sect_add(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
-    H5FS_section_info_t *node, unsigned flags, void *op_data);
-H5_DLL htri_t H5FS_sect_try_merge(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
+H5_DLL herr_t H5FS_sect_add(H5F_t *f, H5FS_t *fspace, H5FS_section_info_t *node,
+    unsigned flags, void *op_data);
+H5_DLL htri_t H5FS_sect_try_merge(H5F_t *f, H5FS_t *fspace,
     H5FS_section_info_t *sect, unsigned flags, void *op_data);
-H5_DLL htri_t H5FS_sect_try_extend(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
-    haddr_t addr, hsize_t size, hsize_t extra_requested, unsigned flags, void *op_data);
-H5_DLL herr_t H5FS_sect_remove(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
-    H5FS_section_info_t *node);
-H5_DLL htri_t H5FS_sect_find(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
-    hsize_t request, H5FS_section_info_t **node);
-H5_DLL herr_t H5FS_sect_iterate(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5FS_operator_t op, void *op_data);
+H5_DLL htri_t H5FS_sect_try_extend(H5F_t *f, H5FS_t *fspace, haddr_t addr,
+    hsize_t size, hsize_t extra_requested, unsigned flags, void *op_data);
+H5_DLL herr_t H5FS_sect_remove(H5F_t *f, H5FS_t *fspace, H5FS_section_info_t *node);
+H5_DLL htri_t H5FS_sect_find(H5F_t *f, H5FS_t *fspace, hsize_t request,
+    H5FS_section_info_t **node);
+H5_DLL herr_t H5FS_sect_iterate(H5F_t *f, H5FS_t *fspace, H5FS_operator_t op, void *op_data);
 H5_DLL herr_t H5FS_sect_stats(const H5FS_t *fspace, hsize_t *tot_space,
     hsize_t *nsects);
-H5_DLL herr_t H5FS_sect_change_class(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
+H5_DLL herr_t H5FS_sect_change_class(H5F_t *f, H5FS_t *fspace,
     H5FS_section_info_t *sect, uint16_t new_class);
-H5_DLL htri_t H5FS_sect_try_shrink_eoa(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
+H5_DLL htri_t H5FS_sect_try_shrink_eoa(H5F_t *f, H5FS_t *fspace,
     void *op_data);
 
 /* Statistics routine */
@@ -215,16 +215,14 @@ H5_DLL herr_t H5FS_stat_info(const H5F_t *f, const H5FS_t *frsp, H5FS_stat_t *st
 H5_DLL herr_t H5FS_get_sect_count(const H5FS_t *frsp, hsize_t *tot_sect_count);
 
 /* free space manager settling routines */
-H5_DLL herr_t H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f,
-                                                          hid_t dxpl_id,
-                                                          H5FS_t *fspace,
-                                                          haddr_t *fs_addr_ptr);
+H5_DLL herr_t H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f, H5FS_t *fspace,
+    haddr_t *fs_addr_ptr);
 
 /* Debugging routines for dumping file structures */
-H5_DLL herr_t H5FS_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth);
-H5_DLL herr_t H5FS_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth, haddr_t fs_addr, haddr_t client_addr);
+H5_DLL herr_t H5FS_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth);
+H5_DLL herr_t H5FS_sects_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth, haddr_t fs_addr, haddr_t client_addr);
 H5_DLL herr_t H5FS_sect_debug(const H5FS_t *fspace, const H5FS_section_info_t *sect,
     FILE *stream, int indent, int fwidth);
 
diff --git a/src/H5FSpublic.h b/src/H5FSpublic.h
index 87debe8..3090d0d 100644
--- a/src/H5FSpublic.h
+++ b/src/H5FSpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5FSsection.c b/src/H5FSsection.c
index 49ff003..f0d9f47 100644
--- a/src/H5FSsection.c
+++ b/src/H5FSsection.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -206,7 +204,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5FS_sinfo_lock(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, unsigned accmode)
+H5FS_sinfo_lock(H5F_t *f, H5FS_t *fspace, unsigned accmode)
 {
     H5FS_sinfo_cache_ud_t cache_udata; /* User-data for cache callback */
     herr_t ret_value = SUCCEED;    /* Return value */
@@ -238,14 +236,13 @@ HDfprintf(stderr, "%s: fspace->alloc_sect_size = %Hu, fspace->sect_size = %Hu\n"
             /* Check if we need to switch from read-only access to read-write */
 	    if(0 == (accmode & (unsigned)(~H5AC__READ_ONLY_FLAG))) {
                 /* Unprotect the read-only section info */
-                if(H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_unprotect(f, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_FSPACE, H5E_CANTUNPROTECT, FAIL, "unable to release free space section info")
 
                 /* Re-protect the section info with read-write access */
                 cache_udata.f = f;
-                cache_udata.dxpl_id = dxpl_id;
                 cache_udata.fspace = fspace;
-                if(NULL == (fspace->sinfo = (H5FS_sinfo_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+                if(NULL == (fspace->sinfo = (H5FS_sinfo_t *)H5AC_protect(f, H5AC_FSPACE_SINFO, fspace->sect_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
                     HGOTO_ERROR(H5E_FSPACE, H5E_CANTPROTECT, FAIL, "unable to load free space sections")
 
                 /* Switch the access mode we have */
@@ -265,9 +262,8 @@ HDfprintf(stderr, "%s: Reading in existing sections, fspace->sect_addr = %a\n",
 #endif /* H5FS_SINFO_DEBUG */
             /* Protect the free space sections */
             cache_udata.f = f;
-            cache_udata.dxpl_id = dxpl_id;
             cache_udata.fspace = fspace;
-            if(NULL == (fspace->sinfo = (H5FS_sinfo_t *)H5AC_protect(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, &cache_udata, accmode)))
+            if(NULL == (fspace->sinfo = (H5FS_sinfo_t *)H5AC_protect(f, H5AC_FSPACE_SINFO, fspace->sect_addr, &cache_udata, accmode)))
                 HGOTO_ERROR(H5E_FSPACE, H5E_CANTPROTECT, FAIL, "unable to load free space sections")
 
             /* Remember that we protected the section info & the access mode */
@@ -319,7 +315,7 @@ HDfprintf(stderr, "%s: fspace->alloc_sect_size = %Hu, fspace->sect_size = %Hu\n"
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5FS_sinfo_unlock(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, hbool_t modified)
+H5FS_sinfo_unlock(H5F_t *f, H5FS_t *fspace, hbool_t modified)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -388,7 +384,7 @@ HDfprintf(stderr, "%s: fspace->alloc_sect_size = %Hu, fspace->sect_size = %Hu\n"
 #ifdef H5FS_SINFO_DEBUG
 HDfprintf(stderr, "%s: Unprotecting section info, cache_flags = %u\n", FUNC, cache_flags);
 #endif /* H5FS_SINFO_DEBUG */
-            if(H5AC_unprotect(f, dxpl_id, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, cache_flags) < 0)
+            if(H5AC_unprotect(f, H5AC_FSPACE_SINFO, fspace->sect_addr, fspace->sinfo, cache_flags) < 0)
                 HGOTO_ERROR(H5E_FSPACE, H5E_CANTUNPROTECT, FAIL, "unable to release free space section info")
 
             /* Reset the protected flag on the section info */
@@ -453,10 +449,9 @@ HDfprintf(stderr, "%s: Relinquishing section info ownership\n", FUNC);
 HDfprintf(stderr, "%s: Freeing section info on disk, old_sect_addr = %a, old_alloc_sect_size = %Hu\n", FUNC, old_sect_addr, old_alloc_sect_size);
 #endif /* H5FS_SINFO_DEBUG */
             /* Release space for section info in file */
-            if(!H5F_IS_TMP_ADDR(f, old_sect_addr)) {
-                if(H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, dxpl_id, old_sect_addr, old_alloc_sect_size) < 0)
+            if(!H5F_IS_TMP_ADDR(f, old_sect_addr))
+                if(H5MF_xfree(f, H5FD_MEM_FSPACE_SINFO, old_sect_addr, old_alloc_sect_size) < 0)
                     HGOTO_ERROR(H5E_FSPACE, H5E_CANTFREE, FAIL, "unable to free free space sections")
-            } /* end if */
         } /* end if */
     } /* end if */
 
@@ -899,8 +894,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_sect_remove(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
-    H5FS_section_info_t *sect)
+H5FS_sect_remove(H5F_t *f, H5FS_t *fspace, H5FS_section_info_t *sect)
 {
     hbool_t sinfo_valid = FALSE;        /* Whether the section info is valid */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -913,7 +907,7 @@ H5FS_sect_remove(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
     HDassert(sect);
 
     /* Get a pointer to the section info */
-    if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(H5FS_sinfo_lock(f, fspace, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
     sinfo_valid = TRUE;
 
@@ -923,7 +917,7 @@ H5FS_sect_remove(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, TRUE) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, TRUE) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1364,8 +1358,8 @@ HDfprintf(stderr, "%s: Leaving, ret_value = %d\n", FUNC, ret_value);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_sect_add(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5FS_section_info_t *sect,
-    unsigned flags, void *op_data)
+H5FS_sect_add(H5F_t *f, H5FS_t *fspace, H5FS_section_info_t *sect, unsigned flags,
+    void *op_data)
 {
     H5FS_section_class_t *cls;          /* Section's class */
     hbool_t sinfo_valid = FALSE;        /* Whether the section info is valid */
@@ -1385,16 +1379,15 @@ HDfprintf(stderr, "%s: *sect = {%a, %Hu, %u, %s}\n", FUNC, sect->addr, sect->siz
     HDassert(sect->size);
 
     /* Get a pointer to the section info */
-    if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(H5FS_sinfo_lock(f, fspace, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
     sinfo_valid = TRUE;
 
     /* Call "add" section class callback, if there is one */
     cls = &fspace->sect_cls[sect->type];
-    if(cls->add) {
+    if(cls->add)
         if((*cls->add)(&sect, &flags, op_data) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTINSERT, FAIL, "'add' section class callback failed")
-    } /* end if */
 
     /* Check for merging returned space with existing section node */
     if(flags & H5FS_ADD_RETURNED_SPACE) {
@@ -1425,12 +1418,12 @@ HDfprintf(stderr, "%s: fspace->tot_space = %Hu\n", FUNC, fspace->tot_space);
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, sinfo_modified) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, sinfo_modified) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
 #ifdef H5FS_DEBUG_ASSERT
 if(!(flags & (H5FS_ADD_DESERIALIZING | H5FS_ADD_SKIP_VALID)))
-    H5FS_assert(fspace, dxpl_id);
+    H5FS__assert(fspace);
 #endif /* H5FS_DEBUG_ASSERT */
 #ifdef H5FS_SINFO_DEBUG
 HDfprintf(stderr, "%s: Leaving, ret_value = %d\n", FUNC, ret_value);
@@ -1452,7 +1445,7 @@ HDfprintf(stderr, "%s: Leaving, ret_value = %d\n", FUNC, ret_value);
  *-------------------------------------------------------------------------
  */
 htri_t
-H5FS_sect_try_extend(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, haddr_t addr,
+H5FS_sect_try_extend(H5F_t *f, H5FS_t *fspace, haddr_t addr,
     hsize_t size, hsize_t extra_requested, unsigned flags, void *op_data)
 {
     hbool_t sinfo_valid = FALSE;        /* Whether the section info is valid */
@@ -1482,7 +1475,7 @@ HDfprintf(stderr, "%s: fspace->ghost_sect_count = %Hu\n", FUNC, fspace->ghost_se
         H5FS_section_info_t *sect;      /* Temporary free space section */
 
         /* Get a pointer to the section info */
-        if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__NO_FLAGS_SET) < 0)
+        if(H5FS_sinfo_lock(f, fspace, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
         sinfo_valid = TRUE;
 
@@ -1568,7 +1561,7 @@ if(_section_)
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, sinfo_modified) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, sinfo_modified) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1590,7 +1583,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5FS_sect_try_merge(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5FS_section_info_t *sect,
+H5FS_sect_try_merge(H5F_t *f, H5FS_t *fspace, H5FS_section_info_t *sect,
     unsigned flags, void *op_data)
 {
     hbool_t sinfo_valid = FALSE;        /* Whether the section info is valid */
@@ -1608,7 +1601,7 @@ H5FS_sect_try_merge(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5FS_section_info_t
     HDassert(sect->size);
 
     /* Get a pointer to the section info */
-    if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(H5FS_sinfo_lock(f, fspace, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
     sinfo_valid = TRUE;
     saved_fs_size = sect->size;
@@ -1634,7 +1627,7 @@ H5FS_sect_try_merge(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5FS_section_info_t
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, sinfo_modified) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, sinfo_modified) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1804,8 +1797,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5FS_sect_find(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, hsize_t request,
-    H5FS_section_info_t **node)
+H5FS_sect_find(H5F_t *f, H5FS_t *fspace, hsize_t request, H5FS_section_info_t **node)
 {
     hbool_t sinfo_valid = FALSE;        /* Whether the section info is valid */
     hbool_t sinfo_modified = FALSE;     /* Whether the section info was modified */
@@ -1831,7 +1823,7 @@ HDfprintf(stderr, "%s: fspace->ghost_sect_count = %Hu\n", FUNC, fspace->ghost_se
 #endif /* QAK */
     if(fspace->tot_sect_count > 0) {
         /* Get a pointer to the section info */
-        if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__NO_FLAGS_SET) < 0)
+        if(H5FS_sinfo_lock(f, fspace, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
         sinfo_valid = TRUE;
 
@@ -1851,11 +1843,11 @@ HDfprintf(stderr, "%s: (*node)->size = %Hu, (*node)->addr = %a, (*node)->type =
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, sinfo_modified) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, sinfo_modified) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
 #ifdef H5FS_DEBUG_ASSERT
-    H5FS_assert(fspace, dxpl_id);
+    H5FS__assert(fspace);
 #endif /* H5FS_DEBUG_ASSERT */
     FUNC_LEAVE_NOAPI(ret_value)
 } /* H5FS_sect_find() */
@@ -1947,7 +1939,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_sect_iterate(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5FS_operator_t op, void *op_data)
+H5FS_sect_iterate(H5F_t *f, H5FS_t *fspace, H5FS_operator_t op, void *op_data)
 {
     H5FS_iter_ud_t udata;               /* User data for callbacks */
     hbool_t sinfo_valid = FALSE;        /* Whether the section info is valid */
@@ -1973,7 +1965,7 @@ HDfprintf(stderr, "%s: fspace->tot_sect_count = %Hu\n", FUNC, fspace->tot_sect_c
         unsigned bin;           /* Current bin we are on */
 
         /* Get a pointer to the section info */
-        if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__READ_ONLY_FLAG) < 0)
+        if(H5FS_sinfo_lock(f, fspace, H5AC__READ_ONLY_FLAG) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
         sinfo_valid = TRUE;
 
@@ -1993,7 +1985,7 @@ HDfprintf(stderr, "%s: Iterate over section bins\n", FUNC);
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, FALSE) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, FALSE) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2044,8 +2036,8 @@ H5FS_sect_stats(const H5FS_t *fspace, hsize_t *tot_space, hsize_t *nsects)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_sect_change_class(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
-    H5FS_section_info_t *sect, uint16_t new_class)
+H5FS_sect_change_class(H5F_t *f, H5FS_t *fspace, H5FS_section_info_t *sect,
+    uint16_t new_class)
 {
     const H5FS_section_class_t *old_cls;        /* Old class of section */
     const H5FS_section_class_t *new_cls;        /* New class of section */
@@ -2062,7 +2054,7 @@ H5FS_sect_change_class(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace,
     HDassert(new_class < fspace->nclasses);
 
     /* Get a pointer to the section info */
-    if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(H5FS_sinfo_lock(f, fspace, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
     sinfo_valid = TRUE;
 
@@ -2192,7 +2184,7 @@ HDfprintf(stderr, "%s: removing object from merge list, sect->type = %u\n", FUNC
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, TRUE) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, TRUE) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2201,7 +2193,7 @@ done:
 #ifdef H5FS_DEBUG_ASSERT
 
 /*-------------------------------------------------------------------------
- * Function:    H5FS_sect_assert
+ * Function:    H5FS__sect_assert
  *
  * Purpose:     Verify that the sections managed are mostly sane
  *
@@ -2213,13 +2205,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_sect_assert(const H5FS_t *fspace, hid_t dxpl_id)
+H5FS__sect_assert(const H5FS_t *fspace)
 {
     hsize_t separate_obj;       /* The number of separate objects managed */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_PACKAGE_NOERR
 #ifdef QAK
-HDfprintf(stderr, "%s: fspace->tot_sect_count = %Hu\n", "H5FS_sect_assert", fspace->tot_sect_count);
+HDfprintf(stderr, "%s: fspace->tot_sect_count = %Hu\n", "H5FS__sect_assert", fspace->tot_sect_count);
 #endif /* QAK */
 
     /* Initialize state */
@@ -2278,14 +2270,14 @@ HDfprintf(stderr, "%s: fspace->tot_sect_count = %Hu\n", "H5FS_sect_assert", fspa
                         sect = H5SL_item(curr_sect_node);
                         cls = &fspace->sect_cls[sect->type];
 #ifdef QAK
-HDfprintf(stderr, "%s: sect->size = %Hu, sect->addr = %a, sect->type = %u\n", "H5FS_assert", sect->size, sect->addr, sect->type);
+HDfprintf(stderr, "%s: sect->size = %Hu, sect->addr = %a, sect->type = %u\n", "H5FS__sect_assert", sect->size, sect->addr, sect->type);
 #endif /* QAK */
 
                         /* Sanity check section */
                         HDassert(H5F_addr_defined(sect->addr));
                         HDassert(fspace_node->sect_size == sect->size);
                         if(cls->valid)
-                            (*cls->valid)(cls, sect, dxpl_id);
+                            (*cls->valid)(cls, sect);
 
                         /* Add to correct count */
                         if(cls->flags & H5FS_CLS_GHOST_OBJ)
@@ -2346,7 +2338,7 @@ HDfprintf(stderr, "%s: sect->size = %Hu, sect->addr = %a, sect->type = %u\n", "H
         HDassert(fspace->tot_sect_count == (separate_obj + H5SL_count(fspace->sinfo->merge_list)));
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5FS_sect_assert() */
+} /* end H5FS__sect_assert() */
 #endif /* H5FS_DEBUG_ASSERT */
 
 
@@ -2364,7 +2356,7 @@ HDfprintf(stderr, "%s: sect->size = %Hu, sect->addr = %a, sect->type = %u\n", "H
  *-------------------------------------------------------------------------
  */
 htri_t
-H5FS_sect_try_shrink_eoa(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, void *op_data)
+H5FS_sect_try_shrink_eoa(H5F_t *f, H5FS_t *fspace, void *op_data)
 {
     hbool_t sinfo_valid = FALSE;        /* Whether the section info is valid */
     hbool_t section_removed = FALSE;    /* Whether a section was removed */
@@ -2375,7 +2367,7 @@ H5FS_sect_try_shrink_eoa(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, void *op_data)
     /* Check arguments. */
     HDassert(fspace);
 
-    if(H5FS_sinfo_lock(f, dxpl_id, fspace, H5AC__NO_FLAGS_SET) < 0)
+    if(H5FS_sinfo_lock(f, fspace, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_FSPACE, H5E_CANTGET, FAIL, "can't get section info")
     sinfo_valid = TRUE;
 
@@ -2413,7 +2405,7 @@ H5FS_sect_try_shrink_eoa(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, void *op_data)
 
 done:
     /* Release the section info */
-    if(sinfo_valid && H5FS_sinfo_unlock(f, dxpl_id, fspace, section_removed) < 0)
+    if(sinfo_valid && H5FS_sinfo_unlock(f, fspace, section_removed) < 0)
         HDONE_ERROR(H5E_FSPACE, H5E_CANTRELEASE, FAIL, "can't release section info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2511,8 +2503,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f, hid_t dxpl_id,
-    H5FS_t *fspace, haddr_t *fs_addr_ptr)
+H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f, H5FS_t *fspace,
+    haddr_t *fs_addr_ptr)
 {
     hsize_t	hdr_alloc_size;
     hsize_t	sinfo_alloc_size;
@@ -2580,11 +2572,8 @@ H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f, hid_t dxpl_id,
         } /* end if */
 
         /* allocate space for the hdr */
-        if(HADDR_UNDEF == (fspace->addr = H5FD_alloc(f->shared->lf, dxpl_id,
-                                                   H5FD_MEM_FSPACE_HDR, f, 
-                                                   hdr_alloc_size,
-                                                   &eoa_frag_addr,
-                                                   &eoa_frag_size)))
+        if(HADDR_UNDEF == (fspace->addr = H5FD_alloc(f->shared->lf, H5FD_MEM_FSPACE_HDR,
+                f, hdr_alloc_size, &eoa_frag_addr, &eoa_frag_size)))
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTALLOC, FAIL, "can't allocate file space for hdr")
 
         /* if the file alignement is 1, there should be no
@@ -2593,7 +2582,7 @@ H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f, hid_t dxpl_id,
         HDassert((eoa_frag_size == 0) || (f->shared->alignment != 1));
 
         /* Cache the new free space header (pinned) */
-        if(H5AC_insert_entry(f, dxpl_id, H5AC_FSPACE_HDR, fspace->addr, fspace, H5AC__PIN_ENTRY_FLAG) < 0)
+        if(H5AC_insert_entry(f, H5AC_FSPACE_HDR, fspace->addr, fspace, H5AC__PIN_ENTRY_FLAG) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTINIT, FAIL, "can't add free space header to cache")
 
         *fs_addr_ptr = fspace->addr;
@@ -2623,11 +2612,8 @@ H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f, hid_t dxpl_id,
         } /* end if */
 
         /* allocate space for the section info */
-        if(HADDR_UNDEF == (sect_addr = H5FD_alloc(f->shared->lf, dxpl_id,
-                                                  H5FD_MEM_FSPACE_SINFO, f, 
-                                                  sinfo_alloc_size,
-                                                  &eoa_frag_addr,
-                                                  &eoa_frag_size)))
+        if(HADDR_UNDEF == (sect_addr = H5FD_alloc(f->shared->lf, H5FD_MEM_FSPACE_SINFO,
+                f, sinfo_alloc_size, &eoa_frag_addr, &eoa_frag_size)))
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTALLOC, FAIL, "can't allocate file space")
 
         /* if the file alignement is 1, there should be no
@@ -2664,7 +2650,7 @@ H5FS_vfd_alloc_hdr_and_section_info_if_needed(H5F_t *f, hid_t dxpl_id,
          *
          *                                        JRM -- 11/4/16
          */
-        if(H5AC_insert_entry(f, dxpl_id, H5AC_FSPACE_SINFO, sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_insert_entry(f, H5AC_FSPACE_SINFO, sect_addr, fspace->sinfo, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_CANTINIT, FAIL, "can't add free space sinfo to cache")
 
         /* We have changed the sinfo address -- Mark free space header dirty */
diff --git a/src/H5FSstat.c b/src/H5FSstat.c
index 3200849..e2ad5bb 100644
--- a/src/H5FSstat.c
+++ b/src/H5FSstat.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5FStest.c b/src/H5FStest.c
index 06f5166..5ab0219 100644
--- a/src/H5FStest.c
+++ b/src/H5FStest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Faccum.c b/src/H5Faccum.c
index 7f3bb39..0b33f8e 100644
--- a/src/H5Faccum.c
+++ b/src/H5Faccum.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -112,31 +110,27 @@ H5FL_BLK_DEFINE_STATIC(meta_accum);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__accum_read(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t addr,
+H5F__accum_read(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
     size_t size, void *buf/*out*/)
 {
-    H5FD_io_info_t fdio_info;           /* File driver I/O info */
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    H5FD_t *file;                       /* File driver pointer */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
-    HDassert(fio_info);
-    HDassert(fio_info->f);
-    HDassert(fio_info->meta_dxpl);
-    HDassert(fio_info->raw_dxpl);
+    /* Sanity checks */
+    HDassert(f);
     HDassert(buf);
 
     /* Translate to file driver I/O info object */
-    fdio_info.file = fio_info->f->shared->lf;
-    fdio_info.meta_dxpl = fio_info->meta_dxpl;
-    fdio_info.raw_dxpl = fio_info->raw_dxpl;
+    file = f->shared->lf;
 
     /* Check if this information is in the metadata accumulator */
-    if((fio_info->f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
+    if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
         H5F_meta_accum_t *accum;     /* Alias for file's metadata accumulator */
 
         /* Set up alias for file's metadata accumulator info */
-        accum = &fio_info->f->shared->accum;
+        accum = &f->shared->accum;
 
         if(size < H5F_ACCUM_MAX_SIZE) {
             /* Sanity check */
@@ -185,7 +179,7 @@ H5F__accum_read(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t add
                         accum->dirty_off += amount_before;
 
                     /* Dispatch to driver */
-                    if(H5FD_read(&fdio_info, map_type, addr, amount_before, accum->buf) < 0)
+                    if(H5FD_read(file, map_type, addr, amount_before, accum->buf) < 0)
                         HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
                 } /* end if */
                 else
@@ -199,7 +193,7 @@ H5F__accum_read(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t add
                     H5_CHECKED_ASSIGN(amount_after, size_t, ((addr + size) - (accum->loc + accum->size)), hsize_t);
 
                     /* Dispatch to driver */
-                    if(H5FD_read(&fdio_info, map_type, (accum->loc + accum->size), amount_after, (accum->buf + accum->size + amount_before)) < 0)
+                    if(H5FD_read(file, map_type, (accum->loc + accum->size), amount_after, (accum->buf + accum->size + amount_before)) < 0)
                         HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
                 } /* end if */
 
@@ -213,13 +207,13 @@ H5F__accum_read(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t add
             /* Current read doesn't overlap with metadata accumulator, read it from file */
             else {
                 /* Dispatch to driver */
-                if(H5FD_read(&fdio_info, map_type, addr, size, buf) < 0)
+                if(H5FD_read(file, map_type, addr, size, buf) < 0)
                     HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
             } /* end else */
         } /* end if */
         else {
             /* Read the data */
-            if(H5FD_read(&fdio_info, map_type, addr, size, buf) < 0)
+            if(H5FD_read(file, map_type, addr, size, buf) < 0)
                 HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
 
             /* Check for overlap w/dirty accumulator */
@@ -262,7 +256,7 @@ H5F__accum_read(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t add
     } /* end if */
     else {
         /* Read the data */
-        if(H5FD_read(&fdio_info, map_type, addr, size, buf) < 0)
+        if(H5FD_read(file, map_type, addr, size, buf) < 0)
             HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "driver read request failed")
     } /* end else */
 
@@ -285,7 +279,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F__accum_adjust(H5F_meta_accum_t *accum, const H5FD_io_info_t *fdio_info,
+H5F__accum_adjust(H5F_meta_accum_t *accum, H5FD_t *file,
     H5F_accum_adjust_t adjust, size_t size)
 {
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -293,7 +287,7 @@ H5F__accum_adjust(H5F_meta_accum_t *accum, const H5FD_io_info_t *fdio_info,
     FUNC_ENTER_STATIC
 
     HDassert(accum);
-    HDassert(fdio_info);
+    HDassert(file);
     HDassert(H5F_ACCUM_APPEND == adjust || H5F_ACCUM_PREPEND == adjust);
     HDassert(size > 0);
     HDassert(size <= H5F_ACCUM_MAX_SIZE);
@@ -351,7 +345,7 @@ H5F__accum_adjust(H5F_meta_accum_t *accum, const H5FD_io_info_t *fdio_info,
                     /* Check if the dirty region overlaps the region to eliminate from the accumulator */
                     if((accum->size - shrink_size) < (accum->dirty_off + accum->dirty_len)) {
                         /* Write out the dirty region from the metadata accumulator, with dispatch to driver */
-                        if(H5FD_write(fdio_info, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off), accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
+                        if(H5FD_write(file, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off), accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
                             HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "file write failed")
 
                         /* Reset accumulator dirty flag */
@@ -362,7 +356,7 @@ H5F__accum_adjust(H5F_meta_accum_t *accum, const H5FD_io_info_t *fdio_info,
                     /* Check if the dirty region overlaps the region to eliminate from the accumulator */
                     if(shrink_size > accum->dirty_off) {
                         /* Write out the dirty region from the metadata accumulator, with dispatch to driver */
-                        if(H5FD_write(fdio_info, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off), accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
+                        if(H5FD_write(file, H5FD_MEM_DEFAULT, (accum->loc + accum->dirty_off), accum->dirty_len, (accum->buf + accum->dirty_off)) < 0)
                             HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "file write failed")
 
                         /* Reset accumulator dirty flag */
@@ -424,32 +418,28 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t addr,
+H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
     size_t size, const void *buf)
 {
-    H5FD_io_info_t fdio_info;           /* File driver I/O info */
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    H5FD_t *file;                       /* File driver pointer */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert(fio_info);
-    HDassert(fio_info->f);
-    HDassert(H5F_INTENT(fio_info->f) & H5F_ACC_RDWR);
-    HDassert(fio_info->meta_dxpl);
-    HDassert(fio_info->raw_dxpl);
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(H5F_INTENT(f) & H5F_ACC_RDWR);
     HDassert(buf);
 
-    /* Translate to file driver I/O info object */
-    fdio_info.file = fio_info->f->shared->lf;
-    fdio_info.meta_dxpl = fio_info->meta_dxpl;
-    fdio_info.raw_dxpl = fio_info->raw_dxpl;
+    /* Translate to file driver pointer */
+    file = f->shared->lf;
 
     /* Check for accumulating metadata */
-    if((fio_info->f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
+    if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && map_type != H5FD_MEM_DRAW) {
         H5F_meta_accum_t *accum;     /* Alias for file's metadata accumulator */
 
         /* Set up alias for file's metadata accumulator info */
-        accum = &fio_info->f->shared->accum;
+        accum = &f->shared->accum;
 
         if(size < H5F_ACCUM_MAX_SIZE) {
             /* Sanity check */
@@ -460,7 +450,7 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
                 /* Check if the new metadata adjoins the beginning of the current accumulator */
                 if((addr + size) == accum->loc) {
                     /* Check if we need to adjust accumulator size */
-                    if(H5F__accum_adjust(accum, &fdio_info, H5F_ACCUM_PREPEND, size) < 0)
+                    if(H5F__accum_adjust(accum, file, H5F_ACCUM_PREPEND, size) < 0)
                         HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
 
                     /* Move the existing metadata to the proper location */
@@ -485,7 +475,7 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
                 /* Check if the new metadata adjoins the end of the current accumulator */
                 else if(addr == (accum->loc + accum->size)) {
                     /* Check if we need to adjust accumulator size */
-                    if(H5F__accum_adjust(accum, &fdio_info, H5F_ACCUM_APPEND, size) < 0)
+                    if(H5F__accum_adjust(accum, file, H5F_ACCUM_APPEND, size) < 0)
                         HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
 
                     /* Copy the new metadata to the end */
@@ -545,7 +535,7 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
                         H5_CHECKED_ASSIGN(add_size, size_t, (accum->loc - addr), hsize_t);
 
                         /* Check if we need to adjust accumulator size */
-                        if(H5F__accum_adjust(accum, &fdio_info, H5F_ACCUM_PREPEND, add_size) < 0)
+                        if(H5F__accum_adjust(accum, file, H5F_ACCUM_PREPEND, add_size) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
 
                         /* Calculate the proper offset of the existing metadata */
@@ -585,7 +575,7 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
                         H5_CHECKED_ASSIGN(add_size, size_t, (addr + size) - (accum->loc + accum->size), hsize_t);
 
                         /* Check if we need to adjust accumulator size */
-                        if(H5F__accum_adjust(accum, &fdio_info, H5F_ACCUM_APPEND, add_size) < 0)
+                        if(H5F__accum_adjust(accum, file, H5F_ACCUM_APPEND, add_size) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
 
                         /* Compute offset of dirty region (after adjusting accumulator) */
@@ -651,7 +641,7 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
                 else {
                     /* Write out the existing metadata accumulator, with dispatch to driver */
                     if(accum->dirty) {
-                        if(H5FD_write(&fdio_info, H5FD_MEM_DEFAULT, accum->loc + accum->dirty_off, accum->dirty_len, accum->buf + accum->dirty_off) < 0)
+                        if(H5FD_write(file, H5FD_MEM_DEFAULT, accum->loc + accum->dirty_off, accum->dirty_len, accum->buf + accum->dirty_off) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
 
                         /* Reset accumulator dirty flag */
@@ -741,13 +731,13 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
         } /* end if */
         else {
             /* Make certain that data in accumulator is visible before new write */
-	    if((H5F_INTENT(fio_info->f) & H5F_ACC_SWMR_WRITE) > 0)
+	    if((H5F_INTENT(f) & H5F_ACC_SWMR_WRITE) > 0)
                 /* Flush if dirty and reset accumulator */
-                if(H5F__accum_reset(fio_info, TRUE) < 0)
+                if(H5F__accum_reset(f, TRUE) < 0)
                     HGOTO_ERROR(H5E_IO, H5E_CANTRESET, FAIL, "can't reset accumulator")
 
             /* Write the data */
-            if(H5FD_write(&fdio_info, map_type, addr, size, buf) < 0)
+            if(H5FD_write(file, map_type, addr, size, buf) < 0)
                 HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
 
             /* Check for overlap w/accumulator */
@@ -792,7 +782,7 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
                     } /* end if */
                     else {        /* Access covers whole accumulator */
                         /* Reset accumulator, but don't flush */
-                        if(H5F__accum_reset(fio_info, FALSE) < 0)
+                        if(H5F__accum_reset(f, FALSE) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_CANTRESET, FAIL, "can't reset accumulator")
                     } /* end else */
                 } /* end if */
@@ -832,7 +822,7 @@ H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t map_type, haddr_t ad
     } /* end if */
     else {
         /* Write the data */
-        if(H5FD_write(&fdio_info, map_type, addr, size, buf) < 0)
+        if(H5FD_write(file, map_type, addr, size, buf) < 0)
             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
     } /* end else */
 
@@ -856,31 +846,26 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__accum_free(const H5F_io_info2_t *fio_info, H5FD_mem_t H5_ATTR_UNUSED type, haddr_t addr,
+H5F__accum_free(H5F_t *f, H5FD_mem_t H5_ATTR_UNUSED type, haddr_t addr,
     hsize_t size)
 {
     H5F_meta_accum_t *accum;            /* Alias for file's metadata accumulator */
-    H5FD_io_info_t fdio_info;           /* File driver I/O info */
+    H5FD_t *file;                       /* File driver pointer */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
     /* check arguments */
-    HDassert(fio_info);
-    HDassert(fio_info->f);
-    HDassert(fio_info->meta_dxpl);
-    HDassert(fio_info->raw_dxpl);
+    HDassert(f);
 
     /* Set up alias for file's metadata accumulator info */
-    accum = &fio_info->f->shared->accum;
+    accum = &f->shared->accum;
 
-    /* Translate to file driver I/O info object */
-    fdio_info.file = fio_info->f->shared->lf;
-    fdio_info.meta_dxpl = fio_info->meta_dxpl;
-    fdio_info.raw_dxpl = fio_info->raw_dxpl;
+    /* Translate to file driver pointer */
+    file = f->shared->lf;
 
     /* Adjust the metadata accumulator to remove the freed block, if it overlaps */
-    if((fio_info->f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA)
+    if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA)
             && H5F_addr_overlap(addr, size, accum->loc, accum->size)) {
         size_t overlap_size;        /* Size of overlap with accumulator */
 
@@ -951,7 +936,7 @@ H5F__accum_free(const H5F_io_info2_t *fio_info, H5FD_mem_t H5_ATTR_UNUSED type,
                     /* Check if block to free is entirely before dirty region */
                     if(H5F_addr_le(tail_addr, dirty_start)) {
                         /* Write out the entire dirty region of the accumulator */
-                        if(H5FD_write(&fdio_info, H5FD_MEM_DEFAULT, dirty_start, accum->dirty_len, accum->buf + accum->dirty_off) < 0)
+                        if(H5FD_write(file, H5FD_MEM_DEFAULT, dirty_start, accum->dirty_len, accum->buf + accum->dirty_off) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
                     } /* end if */
                     /* Block to free overlaps with some/all of dirty region */
@@ -966,7 +951,7 @@ H5F__accum_free(const H5F_io_info2_t *fio_info, H5FD_mem_t H5_ATTR_UNUSED type,
                         HDassert(write_size > 0);
 
                         /* Write out the unfreed dirty region of the accumulator */
-                        if(H5FD_write(&fdio_info, H5FD_MEM_DEFAULT, dirty_start + dirty_delta, write_size, accum->buf + accum->dirty_off + dirty_delta) < 0)
+                        if(H5FD_write(file, H5FD_MEM_DEFAULT, dirty_start + dirty_delta, write_size, accum->buf + accum->dirty_off + dirty_delta) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
                     } /* end if */
 
@@ -986,7 +971,7 @@ H5F__accum_free(const H5F_io_info2_t *fio_info, H5FD_mem_t H5_ATTR_UNUSED type,
                         HDassert(write_size > 0);
 
                         /* Write out the unfreed end of the dirty region of the accumulator */
-                        if(H5FD_write(&fdio_info, H5FD_MEM_DEFAULT, dirty_start + dirty_delta, write_size, accum->buf + accum->dirty_off + dirty_delta) < 0)
+                        if(H5FD_write(file, H5FD_MEM_DEFAULT, dirty_start + dirty_delta, write_size, accum->buf + accum->dirty_off + dirty_delta) < 0)
                             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
                     } /* end if */
 
@@ -1027,32 +1012,28 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__accum_flush(const H5F_io_info2_t *fio_info)
+H5F__accum_flush(H5F_t *f)
 {
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert(fio_info);
-    HDassert(fio_info->f);
-    HDassert(fio_info->meta_dxpl);
-    HDassert(fio_info->raw_dxpl);
+    /* Sanity checks */
+    HDassert(f);
 
     /* Check if we need to flush out the metadata accumulator */
-    if((fio_info->f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && fio_info->f->shared->accum.dirty) {
-        H5FD_io_info_t fdio_info;           /* File driver I/O info */
+    if((f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) && f->shared->accum.dirty) {
+        H5FD_t *file;                       /* File driver pointer */
 
-        /* Translate to file driver I/O info object */
-        fdio_info.file = fio_info->f->shared->lf;
-        fdio_info.meta_dxpl = fio_info->meta_dxpl;
-        fdio_info.raw_dxpl = fio_info->raw_dxpl;
+        /* Translate to file driver pointer */
+        file = f->shared->lf;
 
         /* Flush the metadata contents */
-        if(H5FD_write(&fdio_info, H5FD_MEM_DEFAULT, fio_info->f->shared->accum.loc + fio_info->f->shared->accum.dirty_off, fio_info->f->shared->accum.dirty_len, fio_info->f->shared->accum.buf + fio_info->f->shared->accum.dirty_off) < 0)
+        if(H5FD_write(file, H5FD_MEM_DEFAULT, f->shared->accum.loc + f->shared->accum.dirty_off, f->shared->accum.dirty_len, f->shared->accum.buf + f->shared->accum.dirty_off) < 0)
             HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "file write failed")
 
         /* Reset the dirty flag */
-        fio_info->f->shared->accum.dirty = FALSE;
+        f->shared->accum.dirty = FALSE;
     } /* end if */
 
 done:
@@ -1074,34 +1055,34 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__accum_reset(const H5F_io_info2_t *fio_info, hbool_t flush)
+H5F__accum_reset(H5F_t *f, hbool_t flush)
 {
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_PACKAGE
 
-    HDassert(fio_info);
-    HDassert(fio_info->f);
+    /* Sanity checks */
+    HDassert(f);
 
     /* Flush any dirty data in accumulator, if requested */
     if(flush)
-        if(H5F__accum_flush(fio_info) < 0)
+        if(H5F__accum_flush(f) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "can't flush metadata accumulator")
 
     /* Check if we need to reset the metadata accumulator information */
-    if(fio_info->f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) {
+    if(f->shared->feature_flags & H5FD_FEAT_ACCUMULATE_METADATA) {
         /* Sanity check */
-        HDassert(!fio_info->f->closing || FALSE == fio_info->f->shared->accum.dirty);
+        HDassert(!f->closing || FALSE == f->shared->accum.dirty);
 
         /* Free the buffer */
-        if(fio_info->f->shared->accum.buf)
-            fio_info->f->shared->accum.buf = H5FL_BLK_FREE(meta_accum, fio_info->f->shared->accum.buf);
+        if(f->shared->accum.buf)
+            f->shared->accum.buf = H5FL_BLK_FREE(meta_accum, f->shared->accum.buf);
 
         /* Reset the buffer sizes & location */
-        fio_info->f->shared->accum.alloc_size = fio_info->f->shared->accum.size = 0;
-        fio_info->f->shared->accum.loc = HADDR_UNDEF;
-        fio_info->f->shared->accum.dirty = FALSE;
-        fio_info->f->shared->accum.dirty_len = 0;
+        f->shared->accum.alloc_size = f->shared->accum.size = 0;
+        f->shared->accum.loc = HADDR_UNDEF;
+        f->shared->accum.dirty = FALSE;
+        f->shared->accum.dirty_len = 0;
     } /* end if */
 
 done:
diff --git a/src/H5Fcwfs.c b/src/H5Fcwfs.c
index 32c73b0..aa5f8ab 100644
--- a/src/H5Fcwfs.c
+++ b/src/H5Fcwfs.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -161,7 +159,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_cwfs_find_free_heap(H5F_t *f, hid_t dxpl_id, size_t need, haddr_t *addr)
+H5F_cwfs_find_free_heap(H5F_t *f, size_t need, haddr_t *addr)
 {
     unsigned    cwfsno;                 /* Local index for iterating over collections */
     hbool_t     found = FALSE;          /* Flag to indicate a heap with enough space was found */
@@ -212,11 +210,11 @@ H5F_cwfs_find_free_heap(H5F_t *f, hid_t dxpl_id, size_t need, haddr_t *addr)
             if((H5HG_SIZE(f->shared->cwfs[cwfsno]) + new_need) <= H5HG_MAXSIZE) {
                 htri_t was_extended;        /* Whether the heap was extended */
 
-                was_extended = H5MF_try_extend(f, dxpl_id, H5FD_MEM_GHEAP, H5HG_ADDR(f->shared->cwfs[cwfsno]), (hsize_t)H5HG_SIZE(f->shared->cwfs[cwfsno]), (hsize_t)new_need);
+                was_extended = H5MF_try_extend(f, H5FD_MEM_GHEAP, H5HG_ADDR(f->shared->cwfs[cwfsno]), (hsize_t)H5HG_SIZE(f->shared->cwfs[cwfsno]), (hsize_t)new_need);
                 if(was_extended < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTEXTEND, FAIL, "error trying to extend heap")
                 else if(was_extended == TRUE) {
-                    if(H5HG_extend(f, dxpl_id, H5HG_ADDR(f->shared->cwfs[cwfsno]), new_need) < 0)
+                    if(H5HG_extend(f, H5HG_ADDR(f->shared->cwfs[cwfsno]), new_need) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTRESIZE, FAIL, "unable to extend global heap collection")
                     *addr = H5HG_ADDR(f->shared->cwfs[cwfsno]);
                     found = TRUE;
diff --git a/src/H5Fdbg.c b/src/H5Fdbg.c
index 11accc6..535b43d 100644
--- a/src/H5Fdbg.c
+++ b/src/H5Fdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
diff --git a/src/H5Fdeprec.c b/src/H5Fdeprec.c
index 4a3bce0..6417956 100644
--- a/src/H5Fdeprec.c
+++ b/src/H5Fdeprec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -38,6 +36,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"             /* File access				*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -102,6 +101,7 @@ herr_t
 H5Fget_info1(hid_t obj_id, H5F_info1_t *finfo)
 {
     H5F_t *f;                           /* Top file in mount hierarchy */
+    H5F_info2_t finfo2;                 /* Current file info struct */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -129,21 +129,80 @@ H5Fget_info1(hid_t obj_id, H5F_info1_t *finfo)
     } /* end else */
     HDassert(f->shared);
 
-    /* Reset file info struct */
-    HDmemset(finfo, 0, sizeof(*finfo));
+    /* Get the current file info */
+    if(H5F__get_info(f, &finfo2) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to retrieve file info")
 
-    /* Get the size of the superblock extension */
-    if(H5F__super_size(f, H5AC_ind_read_dxpl_id, NULL, &finfo->super_ext_size) < 0)
-	HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Unable to retrieve superblock extension size")
-
-    /* Check for SOHM info */
-    if(H5F_addr_defined(f->shared->sohm_addr))
-        if(H5SM_ih_size(f, H5AC_ind_read_dxpl_id, &finfo->sohm.hdr_size, &finfo->sohm.msgs_info) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Unable to retrieve SOHM index & heap storage info")
+    /* Copy the compatible fields into the older struct */
+    finfo->super_ext_size = finfo2.super.super_ext_size;
+    finfo->sohm.hdr_size = finfo2.sohm.hdr_size;
+    finfo->sohm.msgs_info = finfo2.sohm.msgs_info;
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Fget_info1() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Fset_latest_format
+ *
+ * Purpose:     Enable switching between latest or non-latest format while
+ *              a file is open.
+ *              This is deprecated starting release 1.10.2 and is modified
+ *              to call the private H5F_set_libver_bounds() to set the
+ *              bounds.
+ *
+ *              Before release 1.10.2, the library supports only two
+ *              combinations of low/high bounds: 
+ *                  (earliest, latest)
+ *                  (latest, latest)
+ *              Thus, this public routine does the job in switching 
+ *              between the two combinations listed above.
+ *
+ *              Starting release 1.10.2, we add v18 to the enumerated
+ *              define H5F_libver_t and the library supports five combinations
+ *              as below:
+ *                  (earliest, v18)
+ *                  (earliest, v10)
+ *                  (v18, v18)
+ *                  (v18, v10)
+ *                  (v10, v10)
+ *              So we introduce the new public routine H5Fset_libver_bounds()
+ *              in place of H5Fset_latest_format().
+ *              See also RFC: Setting Bounds for Object Creation in HDF5 1.10.0.
+ *
+ * Return:      Non-negative on success/Negative on failure
+ *
+ * Programmer:  Vailin Choi; December 2017
+ *             
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Fset_latest_format(hid_t file_id, hbool_t latest_format)
+{
+    H5F_t *f;                               /* File */
+    H5F_libver_t low  = H5F_LIBVER_LATEST;  /* Low bound */
+    H5F_libver_t high = H5F_LIBVER_LATEST;  /* High bound */
+    herr_t ret_value = SUCCEED;             /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE2("e", "ib", file_id, latest_format);
+
+    /* Check args */
+    if(NULL == (f = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "not a file ID")
+
+    /* 'low' and 'high' are both initialized to LATEST.
+       If latest format is not expected, set 'low' to EARLIEST */
+    if(!latest_format)
+        low = H5F_LIBVER_EARLIEST;
+
+    /* Call private set_libver_bounds function to set the bounds */
+    if(H5F__set_libver_bounds(f, low, high) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "cannot set low/high bounds")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5Fset_latest_format() */
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
diff --git a/src/H5Fefc.c b/src/H5Fefc.c
index 42bf5d8..487ed2f 100644
--- a/src/H5Fefc.c
+++ b/src/H5Fefc.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -59,14 +57,15 @@ struct H5F_efc_t {
     unsigned            nfiles;         /* Size of the external file cache */
     unsigned            max_nfiles;     /* Maximum size of the external file cache */
     unsigned            nrefs;          /* Number of times this file appears in another file's EFC */
-    int                 tag;            /* Temporary variable used by H5F_efc_try_close() */
-    H5F_file_t          *tmp_next;      /* Next file in temporary list used by H5F_efc_try_close() */
+    int                 tag;            /* Temporary variable used by H5F__efc_try_close() */
+    H5F_file_t          *tmp_next;      /* Next file in temporary list used by H5F__efc_try_close() */
 };
 
 /* Private prototypes */
-static herr_t H5F_efc_remove_ent(H5F_efc_t *efc, H5F_efc_ent_t *ent);
-static void H5F_efc_try_close_tag1(H5F_file_t *sf, H5F_file_t **tail);
-static void H5F_efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail);
+static herr_t H5F__efc_release_real(H5F_efc_t *efc);
+static herr_t H5F__efc_remove_ent(H5F_efc_t *efc, H5F_efc_ent_t *ent);
+static void H5F__efc_try_close_tag1(H5F_file_t *sf, H5F_file_t **tail);
+static void H5F__efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail);
 
 /* Free lists */
 H5FL_DEFINE_STATIC(H5F_efc_ent_t);
@@ -78,7 +77,7 @@ H5FL_DEFINE_STATIC(H5F_efc_t);
  *
  * Purpose:     Allocate and initialize a new external file cache object,
  *              which can the be used to cache open external files.
- *              the object must be freed with H5F_efc_destroy.
+ *              the object must be freed with H5F__efc_destroy.
  *
  * Return:      Pointer to new external file cache object on success
  *              NULL on failure
@@ -121,7 +120,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_efc_open
+ * Function:    H5F__efc_open
  *
  * Purpose:     Opens a file using the external file cache.  The target
  *              file is added to the external file cache of the parent
@@ -140,15 +139,15 @@ done:
  *-------------------------------------------------------------------------
  */
 H5F_t *
-H5F_efc_open(H5F_t *parent, const char *name, unsigned flags, hid_t fcpl_id,
-    hid_t fapl_id, hid_t dxpl_id)
+H5F__efc_open(H5F_t *parent, const char *name, unsigned flags, hid_t fcpl_id,
+    hid_t fapl_id)
 {
     H5F_efc_t   *efc = NULL;    /* External file cache for parent file */
     H5F_efc_ent_t *ent = NULL;  /* Entry for target file in efc */
     hbool_t     open_file = FALSE; /* Whether ent->file needs to be closed in case of error */
     H5F_t       *ret_value = NULL; /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity checks */
     HDassert(parent);
@@ -162,7 +161,7 @@ H5F_efc_open(H5F_t *parent, const char *name, unsigned flags, hid_t fcpl_id,
      * support this so clients do not have to make 2 different calls depending
      * on the state of the efc. */
     if(!efc) {
-        if(NULL == (ret_value = H5F_open(name, flags, fcpl_id, fapl_id, dxpl_id)))
+        if(NULL == (ret_value = H5F_open(name, flags, fcpl_id, fapl_id)))
             HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "can't open file")
 
         /* Increment the number of open objects to prevent the file from being
@@ -227,14 +226,14 @@ H5F_efc_open(H5F_t *parent, const char *name, unsigned flags, hid_t fcpl_id,
             /* Evict the file if found, otherwise just open the target file and
              * do not add it to cache */
             if(ent) {
-                if(H5F_efc_remove_ent(efc, ent) < 0)
+                if(H5F__efc_remove_ent(efc, ent) < 0)
                     HGOTO_ERROR(H5E_FILE, H5E_CANTREMOVE, NULL, "can't remove entry from external file cache")
 
                 /* Do not free ent, we will recycle it below */
             } /* end if */
             else {
                 /* Cannot cache file, just open file and return */
-                if(NULL == (ret_value = H5F_open(name, flags, fcpl_id, fapl_id, dxpl_id)))
+                if(NULL == (ret_value = H5F_open(name, flags, fcpl_id, fapl_id)))
                     HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "can't open file")
 
                 /* Increment the number of open objects to prevent the file from
@@ -255,7 +254,7 @@ H5F_efc_open(H5F_t *parent, const char *name, unsigned flags, hid_t fcpl_id,
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
         /* Open the file */
-        if(NULL == (ent->file = H5F_open(name, flags, fcpl_id, fapl_id, dxpl_id)))
+        if(NULL == (ent->file = H5F_open(name, flags, fcpl_id, fapl_id)))
             HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "can't open file")
         open_file = TRUE;
 
@@ -309,7 +308,7 @@ done:
         } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_efc_open() */
+} /* end H5F__efc_open() */
 
 
 /*-------------------------------------------------------------------------
@@ -402,7 +401,7 @@ H5F_efc_max_nfiles(H5F_efc_t *efc)
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_efc_release
+ * Function:    H5F__efc_release_real
  *
  * Purpose:     Releases the external file cache, potentially closing any
  *              cached files unless they are held open from somewhere
@@ -416,14 +415,14 @@ H5F_efc_max_nfiles(H5F_efc_t *efc)
  *
  *-------------------------------------------------------------------------
  */
-herr_t
-H5F_efc_release(H5F_efc_t *efc)
+static herr_t
+H5F__efc_release_real(H5F_efc_t *efc)
 {
     H5F_efc_ent_t *ent = NULL;          /* EFC entry */
     H5F_efc_ent_t *prev_ent = NULL;     /* Previous EFC entry */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(efc);
@@ -431,7 +430,7 @@ H5F_efc_release(H5F_efc_t *efc)
     /* Lock the EFC to prevent manipulation of the EFC wile we are releasing it.
      * The EFC should never be locked when we enter this function because that
      * would require a cycle, a cycle would necessarily invoke
-     * H5F_efc_try_close(), and that function checks the status of the lock
+     * H5F__efc_try_close(), and that function checks the status of the lock
      * before calling this one. */
     HDassert((efc->tag == H5F_EFC_TAG_DEFAULT)
             || (efc->tag == H5F_EFC_TAG_CLOSE));
@@ -442,7 +441,7 @@ H5F_efc_release(H5F_efc_t *efc)
     ent = efc->LRU_head;
     while(ent)
         if(!ent->nopen) {
-            if(H5F_efc_remove_ent(efc, ent) < 0)
+            if(H5F__efc_remove_ent(efc, ent) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTREMOVE, FAIL, "can't remove entry from external file cache")
 
             /* Free the entry and move to next entry in LRU list */
@@ -460,11 +459,45 @@ H5F_efc_release(H5F_efc_t *efc)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value);
+} /* end H5F__efc_release_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__efc_release
+ *
+ * Purpose:     Releases the external file cache, potentially closing any
+ *              cached files unless they are held open from somewhere
+ *              else (or are currently opened by a client).
+ *
+ * Return:      Non-negative on success
+ *              Negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *              Sunday, February 18, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__efc_release(H5F_efc_t *efc)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity checks */
+    HDassert(efc);
+
+    /* Call 'real' routine */
+    if(H5F__efc_release_real(efc) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't remove entry from external file cache")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5F_efc_release() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_efc_destroy
+ * Function:    H5F__efc_destroy
  *
  * Purpose:     Frees an external file cache object, releasing it first
  *              if necessary.  If it cannot be fully released, for example
@@ -479,18 +512,18 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_efc_destroy(H5F_efc_t *efc)
+H5F__efc_destroy(H5F_efc_t *efc)
 {
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity checks */
     HDassert(efc);
 
     if(efc->nfiles > 0) {
         /* Release (clear) the efc */
-        if(H5F_efc_release(efc) < 0)
+        if(H5F__efc_release_real(efc) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release external file cache")
 
         /* If there are still cached files, return an error */
@@ -512,11 +545,11 @@ H5F_efc_destroy(H5F_efc_t *efc)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value);
-} /* end H5F_efc_destroy() */
+} /* end H5F__efc_destroy() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_efc_remove_ent
+ * Function:    H5F__efc_remove_ent
  *
  * Purpose:     Removes the specified entry from the specified EFC,
  *              closing the file if requested.  Does not free the entry.
@@ -530,11 +563,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F_efc_remove_ent(H5F_efc_t *efc, H5F_efc_ent_t *ent)
+H5F__efc_remove_ent(H5F_efc_t *efc, H5F_efc_ent_t *ent)
 {
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(efc);
@@ -578,11 +611,11 @@ H5F_efc_remove_ent(H5F_efc_t *efc, H5F_efc_ent_t *ent)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_efc_remove_ent() */
+} /* end H5F__efc_remove_ent() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_efc_try_close_tag1
+ * Function:    H5F__efc_try_close_tag1
  *
  * Purpose:     Recursively traverse the EFC tree, keeping a temporary
  *              reference count on each file that assumes all reachable
@@ -596,12 +629,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static void
-H5F_efc_try_close_tag1(H5F_file_t *sf, H5F_file_t **tail)
+H5F__efc_try_close_tag1(H5F_file_t *sf, H5F_file_t **tail)
 {
     H5F_efc_ent_t       *ent = NULL;    /* EFC entry */
     H5F_file_t          *esf;           /* Convenience pointer to ent->file->shared */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Sanity checks */
     HDassert(sf);
@@ -646,17 +679,17 @@ H5F_efc_try_close_tag1(H5F_file_t *sf, H5F_file_t **tail)
                 } /* end if */
 
                 /* Recurse into the entry */
-                H5F_efc_try_close_tag1(ent->file->shared, tail);
+                H5F__efc_try_close_tag1(ent->file->shared, tail);
             } /* end if */
         } /* end if */
     } /* end for */
 
     FUNC_LEAVE_NOAPI_VOID
-} /* end H5F_efc_try_close_tag1() */
+} /* end H5F__efc_try_close_tag1() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_efc_try_close_tag2
+ * Function:    H5F__efc_try_close_tag2
  *
  * Purpose:     Recuresively mark all files reachable through this one as
  *              uncloseable, and add newly uncloseable files to the tail
@@ -670,12 +703,12 @@ H5F_efc_try_close_tag1(H5F_file_t *sf, H5F_file_t **tail)
  *-------------------------------------------------------------------------
  */
 static void
-H5F_efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail)
+H5F__efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail)
 {
     H5F_efc_ent_t       *ent = NULL;    /* EFC entry */
     H5F_file_t          *esf;           /* Convenience pointer to ent->file->shared */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Sanity checks */
     HDassert(sf);
@@ -717,17 +750,17 @@ H5F_efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail)
                 } /* end if */
 
                 /* Recurse into the entry */
-                H5F_efc_try_close_tag2(esf, tail);
+                H5F__efc_try_close_tag2(esf, tail);
             } /* end if */
         } /* end if */
     } /* end for */
 
     FUNC_LEAVE_NOAPI_VOID
-} /* end H5F_efc_try_close_tag2() */
+} /* end H5F__efc_try_close_tag2() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_efc_try_close
+ * Function:    H5F__efc_try_close
  *
  * Purpose:     Attempts to close the provided (shared) file by checking
  *              to see if the releasing the EFC would cause its reference
@@ -743,7 +776,7 @@ H5F_efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail)
  *              "callback" for the final pass (the one where the files are
  *              actually closed).  The code for the callback case is at
  *              the top of this function; luckily it only consists of a
- *              (possible) call to H5F_efc_release().
+ *              (possible) call to H5F__efc_release_real().
  *
  *              The algorithm basically consists of 3 passes over the EFC
  *              tree.  The first pass assumes that every reachable file is
@@ -759,8 +792,8 @@ H5F_efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail)
  *              closeable only because the first pass assumed that an
  *              uncloseable file would be closed.
  *
- *              The final pass exploits the H5F_efc_release()->
- *              H5F_efc_remove_ent()->H5F_try_close()->H5F_efc_try_close()
+ *              The final pass exploits the H5F__efc_release_real()->
+ *              H5F_efc_remove_ent()->H5F_try_close()->H5F__efc_try_close()
  *              calling chain to recursively close the tree, but only the
  *              files that are still marked as closeable.  All files
  *              marked as closeable have their EFCs released, and will
@@ -777,7 +810,7 @@ H5F_efc_try_close_tag2(H5F_file_t *sf, H5F_file_t **tail)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_efc_try_close(H5F_t *f)
+H5F__efc_try_close(H5F_t *f)
 {
     H5F_file_t  *tail;                  /* Tail of linked list of found files.  Head will be f->shared. */
     H5F_file_t  *uncloseable_head = NULL; /* Head of linked list of files found to be uncloseable by the first pass */
@@ -800,8 +833,8 @@ H5F_efc_try_close(H5F_t *f)
         /* We must have reentered this function, and we should close this file.
          * In actuality, we just release the EFC, the recursion should
          * eventually reduce this file's reference count to 1 (though possibly
-         * not from this call to H5F_efc_release()). */
-        if(H5F_efc_release(f->shared->efc) < 0)
+         * not from this call to H5F__efc_release_real()). */
+        if(H5F__efc_release_real(f->shared->efc) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release external file cache")
 
         /* If we marked the file as closeable, there must be no open files in
@@ -818,7 +851,7 @@ H5F_efc_try_close(H5F_t *f)
     /* Conditions where we should not do anything and just return immediately */
     /* If there are references that are not from an EFC or f, it will never
      * be possible to close the file.  Just return.  Note that this holds true
-     * for the case that this file is being closed through H5F_efc_release()
+     * for the case that this file is being closed through H5F__efc_release_real()
      * because that function (through H5F_efc_remove_ent()) decrements the EFC
      * reference count before it calls H5F_try_close(). This may occur if this
      * function is reentered. */
@@ -853,7 +886,7 @@ H5F_efc_try_close(H5F_t *f)
      * field to keep track of final reference count for each file (including
      * this one).  Keep list of files with starting reference count > 1 (head is
      * f->shared). */
-    H5F_efc_try_close_tag1(f->shared, &tail);
+    H5F__efc_try_close_tag1(f->shared, &tail);
 
     /* Check if f->shared->efc->tag dropped to 0.  If it did not,
      * we cannot close anything.  Just reset temporary values and return. */
@@ -911,7 +944,7 @@ H5F_efc_try_close(H5F_t *f)
         tail = uncloseable_tail;
         HDassert(tail);
         while(sf != tail->efc->tmp_next) {
-            H5F_efc_try_close_tag2(sf, &uncloseable_tail);
+            H5F__efc_try_close_tag2(sf, &uncloseable_tail);
             sf = sf->efc->tmp_next;
         } /* end while */
     } /* end if */
@@ -920,7 +953,7 @@ H5F_efc_try_close(H5F_t *f)
      * should start the recursive release that should close all closeable files.
      * Also, see the top of this function. */
     if(f->shared->efc->tag == H5F_EFC_TAG_CLOSE) {
-        if(H5F_efc_release(f->shared->efc) < 0)
+        if(H5F__efc_release_real(f->shared->efc) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release external file cache")
 
         /* Make sure the file's reference count is now 1 and will be closed by
@@ -943,5 +976,5 @@ H5F_efc_try_close(H5F_t *f)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_efc_try_close() */
+} /* end H5F__efc_try_close() */
 
diff --git a/src/H5Ffake.c b/src/H5Ffake.c
index e191003..6072f2e 100644
--- a/src/H5Ffake.c
+++ b/src/H5Ffake.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Fmodule.h"          /* This source code file is part of the H5F module */
diff --git a/src/H5Fint.c b/src/H5Fint.c
index 444d409..49538f4 100644
--- a/src/H5Fint.c
+++ b/src/H5Fint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -23,20 +21,22 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Aprivate.h"		/* Attributes				*/
-#include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fpkg.h"             /* File access				*/
-#include "H5FDprivate.h"	/* File drivers				*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MFprivate.h"	/* File memory management		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Pprivate.h"		/* Property lists			*/
-#include "H5SMprivate.h"	/* Shared Object Header Messages	*/
-#include "H5Tprivate.h"		/* Datatypes				*/
+#include "H5private.h"         /* Generic Functions */
+#include "H5Aprivate.h"        /* Attributes */
+#include "H5ACprivate.h"       /* Metadata cache */
+#include "H5CXprivate.h"       /* API Contexts */
+#include "H5Dprivate.h"        /* Datasets */
+#include "H5Eprivate.h"        /* Error handling */
+#include "H5Fpkg.h"            /* File access */
+#include "H5FDprivate.h"       /* File drivers */
+#include "H5Gprivate.h"        /* Groups */
+#include "H5Iprivate.h"        /* IDs */
+#include "H5Lprivate.h"        /* Links */
+#include "H5MFprivate.h"       /* File memory management */
+#include "H5MMprivate.h"       /* Memory management */
+#include "H5Pprivate.h"        /* Property lists */
+#include "H5SMprivate.h"       /* Shared Object Header Messages */
+#include "H5Tprivate.h"        /* Datatypes */
 
 
 /****************/
@@ -74,10 +74,13 @@ typedef struct H5F_olist_t {
 /********************/
 
 static int H5F_get_objects_cb(void *obj_ptr, hid_t obj_id, void *key);
+static herr_t H5F__build_name(const char *prefix, const char *file_name,
+    char **full_name/*out*/);
+static char *H5F__getenv_prefix_name(char **env_prefix/*in,out*/);
 static herr_t H5F_build_actual_name(const H5F_t *f, const H5P_genplist_t *fapl,
     const char *name, char ** /*out*/ actual_name);/* Declare a free list to manage the H5F_t struct */
-static herr_t H5F__flush_phase1(H5F_t *f, hid_t meta_dxpl_id);
-static herr_t H5F__flush_phase2(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t closing);
+static herr_t H5F__flush_phase1(H5F_t *f);
+static herr_t H5F__flush_phase2(H5F_t *f, hbool_t closing);
 
 
 /*********************/
@@ -100,28 +103,22 @@ H5FL_DEFINE(H5F_t);
 /* Declare a free list to manage the H5F_file_t struct */
 H5FL_DEFINE(H5F_file_t);
 
+
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_access_plist
+ * Function: H5F_get_access_plist
  *
- * Purpose:	Returns a copy of the file access property list of the
- *		specified file.
+ * Purpose:  Returns a copy of the file access property list of the
+ *           specified file.
  *
  *              NOTE: Make sure that, if you are going to overwrite
  *              information in the copied property list that was
  *              previously opened and assigned to the property list, then
  *              you must close it before overwriting the values.
  *
- * Return:	Success:	Object ID for a copy of the file access
- *				property list.
- *
- *		Failure:	FAIL
- *
- * Programmer:	Quincey Koziol
- *              Wednesday, May 25, 2005
- *
- * Modifications:
- *
+ * Return:   Success:    Object ID for a copy of the file access
+ *                        property list.
+ *           Failure:    FAIL
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -131,9 +128,8 @@ H5F_get_access_plist(H5F_t *f, hbool_t app_ref)
     H5P_genplist_t *old_plist;              /* Old property list */
     H5FD_driver_prop_t driver_prop;         /* Property for driver ID & info */
     hbool_t driver_prop_copied = FALSE;     /* Whether the driver property has been set up */
-    unsigned    efc_size = 0;
-    hbool_t	latest_format = FALSE;	    /* Always use the latest format? */
-    hid_t	ret_value = SUCCEED;        /* Return value */
+    unsigned   efc_size = 0;
+    hid_t      ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -144,7 +140,7 @@ H5F_get_access_plist(H5F_t *f, hbool_t app_ref)
     if(NULL == (old_plist = (H5P_genplist_t *)H5I_object(H5P_LST_FILE_ACCESS_ID_g)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
     if((ret_value = H5P_copy_plist(old_plist, app_ref)) < 0)
-	HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "can't copy file access property list")
+        HGOTO_ERROR(H5E_INTERNAL, H5E_CANTINIT, FAIL, "can't copy file access property list")
     if(NULL == (new_plist = (H5P_genplist_t *)H5I_object(ret_value)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
 
@@ -169,10 +165,10 @@ H5F_get_access_plist(H5F_t *f, hbool_t app_ref)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't sieve buffer size")
     if(H5P_set(new_plist, H5F_ACS_SDATA_BLOCK_SIZE_NAME, &(f->shared->sdata_aggr.alloc_size)) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'small data' cache size")
-    if(f->shared->latest_flags > 0)
-        latest_format = TRUE;
-    if(H5P_set(new_plist, H5F_ACS_LATEST_FORMAT_NAME, &latest_format) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'latest format' flag")
+    if(H5P_set(new_plist, H5F_ACS_LIBVER_LOW_BOUND_NAME, &f->shared->low_bound) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'low' bound for library format versions")
+    if(H5P_set(new_plist, H5F_ACS_LIBVER_HIGH_BOUND_NAME, &f->shared->high_bound) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'high' bound for library format versions")
     if(H5P_set(new_plist, H5F_ACS_METADATA_READ_ATTEMPTS_NAME, &(f->shared->read_attempts)) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set 'read attempts ' flag")
     if(H5P_set(new_plist, H5F_ACS_OBJECT_FLUSH_CB_NAME, &(f->shared->object_flush)) < 0)
@@ -224,16 +220,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_get_obj_count
+ * Function: H5F_get_obj_count
  *
- * Purpose:	Private function return the number of opened object IDs
- *		(files, datasets, groups, datatypes) in the same file.
+ * Purpose:  Private function return the number of opened object IDs
+ *           (files, datasets, groups, datatypes) in the same file.
  *
  * Return:      SUCCEED on success, FAIL on failure.
- *
- * Programmer:  Raymond Lu
- *              Wednesday, Dec 5, 2001
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -261,10 +253,6 @@ done:
  * Purpose:     Private function to return a list of opened object IDs.
  *
  * Return:      Non-negative on success; can't fail.
- *
- * Programmer:  Raymond Lu
- *              Wednesday, Dec 5, 2001
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -287,16 +275,13 @@ done:
 
 
 /*---------------------------------------------------------------------------
- * Function:	H5F_get_objects
+ * Function: H5F_get_objects
  *
- * Purpose:	This function is called by H5F_get_obj_count or
- *		H5F_get_obj_ids to get number of object IDs and/or a
- *		list of opened object IDs (in return value).
- * Return:	Non-negative on success; Can't fail.
- *
- * Programmer:  Raymond Lu
- *              Wednesday, Dec 5, 2001
+ * Purpose:  This function is called by H5F_get_obj_count or
+ *           H5F_get_obj_ids to get number of object IDs and/or a
+ *           list of opened object IDs (in return value).
  *
+ * Return:   Non-negative on success; Can't fail.
  *---------------------------------------------------------------------------
  */
 herr_t
@@ -315,7 +300,7 @@ H5F_get_objects(const H5F_t *f, unsigned types, size_t max_nobjs, hid_t *obj_id_
     olist.obj_id_list  = (max_nobjs==0 ? NULL : obj_id_list);
     olist.obj_id_count = &obj_id_count;
     olist.list_index   = 0;
-    olist.max_nobjs   = max_nobjs;
+    olist.max_nobjs    = max_nobjs;
 
     /* Determine if we are searching for local or global objects */
     if(types & H5F_OBJ_LOCAL) {
@@ -339,37 +324,37 @@ H5F_get_objects(const H5F_t *f, unsigned types, size_t max_nobjs, hid_t *obj_id_
      * or the caller wants to get the list of IDs and the list isn't full,
      * search through dataset IDs to count number of datasets, and put their
      * IDs on the object list */
-    if(!olist.max_nobjs || (olist.max_nobjs && olist.list_index<olist.max_nobjs)) { 
+    if(!olist.max_nobjs || (olist.max_nobjs && olist.list_index<olist.max_nobjs)) {
         if (types & H5F_OBJ_DATASET) {
             olist.obj_type = H5I_DATASET;
             if(H5I_iterate(H5I_DATASET, H5F_get_objects_cb, &olist, app_ref) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed(2)")
         } /* end if */
-    } 
+    }
 
     /* If the caller just wants to count the number of objects (OLIST.MAX_NOBJS is zero),
      * or the caller wants to get the list of IDs and the list isn't full,
      * search through group IDs to count number of groups, and put their
      * IDs on the object list */
-    if(!olist.max_nobjs || (olist.max_nobjs && olist.list_index<olist.max_nobjs)) { 
+    if(!olist.max_nobjs || (olist.max_nobjs && olist.list_index<olist.max_nobjs)) {
         if(types & H5F_OBJ_GROUP) {
             olist.obj_type = H5I_GROUP;
             if(H5I_iterate(H5I_GROUP, H5F_get_objects_cb, &olist, app_ref) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed(3)")
         } /* end if */
-    } 
+    }
 
     /* If the caller just wants to count the number of objects (OLIST.MAX_NOBJS is zero),
      * or the caller wants to get the list of IDs and the list isn't full,
      * search through datatype IDs to count number of named datatypes, and put their
      * IDs on the object list */
-    if(!olist.max_nobjs || (olist.max_nobjs && olist.list_index<olist.max_nobjs)) { 
+    if(!olist.max_nobjs || (olist.max_nobjs && olist.list_index<olist.max_nobjs)) {
         if(types & H5F_OBJ_DATATYPE) {
             olist.obj_type = H5I_DATATYPE;
             if(H5I_iterate(H5I_DATATYPE, H5F_get_objects_cb, &olist, app_ref) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed(4)")
         } /* end if */
-    } 
+    }
 
     /* If the caller just wants to count the number of objects (OLIST.MAX_NOBJS is zero),
      * or the caller wants to get the list of IDs and the list isn't full,
@@ -382,7 +367,7 @@ H5F_get_objects(const H5F_t *f, unsigned types, size_t max_nobjs, hid_t *obj_id_
                 HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed(5)")
         } /* end if */
     }
- 
+
     /* Set the number of objects currently open */
     *obj_id_count_ptr = obj_id_count;
 
@@ -392,18 +377,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_objects_cb
- *
- * Purpose:	H5F_get_objects' callback function.  It verifies if an
- * 		object is in the file, and either count it or put its ID
- *		on the list.
+ * Function: H5F_get_objects_cb
  *
- * Return:      H5_ITER_STOP if the array of object IDs is filled up.
- *              H5_ITER_CONT otherwise.
- *
- * Programmer:  Raymond Lu
- *              Wednesday, Dec 5, 2001
+ * Purpose:  H5F_get_objects' callback function.  It verifies if an
+ *           object is in the file, and either count it or put its ID
+ *           on the list.
  *
+ * Return:   H5_ITER_STOP if the array of object IDs is filled up.
+ *           H5_ITER_CONT otherwise.
  *-------------------------------------------------------------------------
  */
 static int
@@ -421,77 +402,79 @@ H5F_get_objects_cb(void *obj_ptr, hid_t obj_id, void *key)
     /* Count file IDs */
     if(olist->obj_type == H5I_FILE) {
         if((olist->file_info.local &&
-                        (!olist->file_info.ptr.file || (olist->file_info.ptr.file && (H5F_t*)obj_ptr == olist->file_info.ptr.file) ))
-                ||  (!olist->file_info.local &&
-                        ( !olist->file_info.ptr.shared || (olist->file_info.ptr.shared && ((H5F_t*)obj_ptr)->shared == olist->file_info.ptr.shared) ))) {
+                (!olist->file_info.ptr.file ||
+                (olist->file_info.ptr.file && (H5F_t*)obj_ptr == olist->file_info.ptr.file))) ||
+                (!olist->file_info.local &&
+                (!olist->file_info.ptr.shared ||
+                (olist->file_info.ptr.shared && ((H5F_t*)obj_ptr)->shared == olist->file_info.ptr.shared)))) {
             add_obj = TRUE;
-	} /* end if */
+        } /* end if */
     } /* end if */
     else { /* either count opened object IDs or put the IDs on the list */
         H5O_loc_t *oloc;        /* Group entry info for object */
 
-    	switch(olist->obj_type) {
-	    case H5I_ATTR:
-	        oloc = H5A_oloc((H5A_t *)obj_ptr);
+        switch(olist->obj_type) {
+            case H5I_ATTR:
+                oloc = H5A_oloc((H5A_t *)obj_ptr);
                 break;
 
-	    case H5I_GROUP:
-	        oloc = H5G_oloc((H5G_t *)obj_ptr);
+            case H5I_GROUP:
+                oloc = H5G_oloc((H5G_t *)obj_ptr);
                 break;
 
-	    case H5I_DATASET:
-	        oloc = H5D_oloc((H5D_t *)obj_ptr);
-		break;
+            case H5I_DATASET:
+                oloc = H5D_oloc((H5D_t *)obj_ptr);
+                break;
 
-	    case H5I_DATATYPE:
+            case H5I_DATATYPE:
                 if(H5T_is_named((H5T_t*)obj_ptr)==TRUE)
                     oloc = H5T_oloc((H5T_t*)obj_ptr);
                 else
                     oloc = NULL;
-		break;
-
-	    case H5I_UNINIT:
-	    case H5I_BADID:
-	    case H5I_FILE:
-	    case H5I_DATASPACE:
-	    case H5I_REFERENCE:
-	    case H5I_VFL:
-	    case H5I_GENPROP_CLS:
-	    case H5I_GENPROP_LST:
-	    case H5I_ERROR_CLASS:
-	    case H5I_ERROR_MSG:
-	    case H5I_ERROR_STACK:
-	    case H5I_NTYPES:
+                break;
+
+            case H5I_UNINIT:
+            case H5I_BADID:
+            case H5I_FILE:
+            case H5I_DATASPACE:
+            case H5I_REFERENCE:
+            case H5I_VFL:
+            case H5I_GENPROP_CLS:
+            case H5I_GENPROP_LST:
+            case H5I_ERROR_CLASS:
+            case H5I_ERROR_MSG:
+            case H5I_ERROR_STACK:
+            case H5I_NTYPES:
             default:
-                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5_ITER_ERROR, "unknown data object")
-	} /* end switch */
+                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5_ITER_ERROR, "unknown or invalid data object")
+        } /* end switch */
 
         if((olist->file_info.local &&
-                    ( (!olist->file_info.ptr.file && olist->obj_type == H5I_DATATYPE && H5T_is_immutable((H5T_t *)obj_ptr) == FALSE)
-                            || (!olist->file_info.ptr.file && olist->obj_type != H5I_DATATYPE)
-                            || (oloc && oloc->file == olist->file_info.ptr.file)))
-                || (!olist->file_info.local &&
-                    ((!olist->file_info.ptr.shared && olist->obj_type == H5I_DATATYPE && H5T_is_immutable((H5T_t *)obj_ptr) == FALSE)
-                            || (!olist->file_info.ptr.shared && olist->obj_type != H5I_DATATYPE)
-                            || (oloc && oloc->file && oloc->file->shared == olist->file_info.ptr.shared)))) {
+                    ((!olist->file_info.ptr.file && olist->obj_type == H5I_DATATYPE && H5T_is_immutable((H5T_t *)obj_ptr) == FALSE) ||
+                    (!olist->file_info.ptr.file && olist->obj_type != H5I_DATATYPE) ||
+                    (oloc && oloc->file == olist->file_info.ptr.file))) ||
+                    (!olist->file_info.local &&
+                    ((!olist->file_info.ptr.shared && olist->obj_type == H5I_DATATYPE && H5T_is_immutable((H5T_t *)obj_ptr) == FALSE) ||
+                    (!olist->file_info.ptr.shared && olist->obj_type != H5I_DATATYPE) ||
+                    (oloc && oloc->file && oloc->file->shared == olist->file_info.ptr.shared)))) {
             add_obj = TRUE;
-    	} /* end if */
+        } /* end if */
     } /* end else */
 
     if(add_obj) {
         /* Add the object's ID to the ID list, if appropriate */
         if(olist->obj_id_list) {
             olist->obj_id_list[olist->list_index] = obj_id;
-	    olist->list_index++;
-	} /* end if */
+            olist->list_index++;
+        } /* end if */
 
         /* Increment the number of open objects */
-	if(olist->obj_id_count)
+        if(olist->obj_id_count)
             (*olist->obj_id_count)++;
 
         /* Check if we've filled up the array.  Return H5_ITER_STOP only if
          * we have filled up the array. Otherwise return H5_ITER_CONT(RET_VALUE is
-         * preset to H5_ITER_CONT) because H5I_iterate needs the return value of 
+         * preset to H5_ITER_CONT) because H5I_iterate needs the return value of
          * H5_ITER_CONT to continue the iteration. */
         if(olist->max_nobjs > 0 && olist->list_index >= olist->max_nobjs)
             HGOTO_DONE(H5_ITER_STOP)  /* Indicate that the iterator should stop */
@@ -502,46 +485,325 @@ done:
 } /* end H5F_get_objects_cb() */
 
 
-/*-------------------------------------------------------------------------
- * Function:	H5F__is_hdf5
+/*--------------------------------------------------------------------------
+ * Function: H5F__build_name
  *
- * Purpose:	Check the file signature to detect an HDF5 file.
+ * Purpose:  Prepend PREFIX to FILE_NAME and store in FULL_NAME
  *
- * Bugs:	This function is not robust: it only uses the default file
- *		driver when attempting to open the file when in fact it
- *		should use all known file drivers.
+ * Return:   Non-negative on success/Negative on failure
+ *--------------------------------------------------------------------------*/
+static herr_t
+H5F__build_name(const char *prefix, const char *file_name, char **full_name/*out*/)
+{
+    size_t      prefix_len;             /* length of prefix */
+    size_t      fname_len;              /* Length of external link file name */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    prefix_len = HDstrlen(prefix);
+    fname_len = HDstrlen(file_name);
+
+    /* Allocate a buffer to hold the filename + prefix + possibly the delimiter + terminating null byte */
+    if(NULL == (*full_name = (char *)H5MM_malloc(prefix_len + fname_len + 2)))
+        HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, FAIL, "unable to allocate filename buffer")
+
+    /* Compose the full file name */
+    HDsnprintf(*full_name, (prefix_len + fname_len + 2), "%s%s%s", prefix,
+        (H5_CHECK_DELIMITER(prefix[prefix_len - 1]) ? "" : H5_DIR_SEPS), file_name);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5F__build_name() */
+
+
+/*--------------------------------------------------------------------------
+ * Function: H5F__getenv_prefix_name
+ *
+ * Purpose:  Get the first pathname in the list of pathnames stored in env_prefix,
+ *           which is separated by the environment delimiter.
+ *           env_prefix is modified to point to the remaining pathnames
+ *           in the list.
+ *
+ * Return:   A pointer to a pathname
+--------------------------------------------------------------------------*/
+static char *
+H5F__getenv_prefix_name(char **env_prefix/*in,out*/)
+{
+    char *strret;               /* Pointer to next separator */
+    char *ret_value = NULL;     /* Return value */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Set return value now */
+    ret_value = *env_prefix;
+
+    /* Advance to next component, if possible */
+    strret = HDstrchr(*env_prefix, H5_COLON_SEPC);
+    if(strret == NULL)
+        *env_prefix = NULL;
+    else {
+        /* Advance to next component */
+        *env_prefix = strret + 1;
+
+        /* Terminate current component (pointed to by ret_value) */
+        *strret = '\0';
+    } /* end else */
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5F__getenv_prefix_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F_prefix_open_file
  *
- * Return:	Success:	TRUE/FALSE
+ * Purpose:     Attempts to open a dataset file.
+ *
+ * Return:      Pointer to an opened file on success / NULL on failure
+ *-------------------------------------------------------------------------
+ */
+H5F_t *
+H5F_prefix_open_file(H5F_t *primary_file, H5F_prefix_open_t prefix_type,
+    const char *prop_prefix, const char *file_name, unsigned file_intent,
+    hid_t fapl_id)
+{
+    H5F_t       *src_file = NULL;       /* Source file */
+    char        *full_name = NULL;      /* File name with prefix */
+    char        *actual_file_name = NULL; /* File's actual name */
+    char        *temp_file_name = NULL; /* Temporary pointer to file name */
+    size_t      temp_file_name_len;     /* Length of temporary file name */
+    H5F_t       *ret_value = NULL;      /* Return value  */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Simplify intent flags for open calls */
+    file_intent &= (H5F_ACC_RDWR | H5F_ACC_SWMR_WRITE | H5F_ACC_SWMR_READ);
+
+    /* Copy the file name to use */
+    if(NULL == (temp_file_name = H5MM_strdup(file_name)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+    temp_file_name_len = HDstrlen(temp_file_name);
+
+    /* Target file_name is an absolute pathname: see RM for detailed description */
+    if(H5_CHECK_ABSOLUTE(file_name) || H5_CHECK_ABS_PATH(file_name)) {
+        /* Try opening file */
+       src_file = H5F__efc_open(primary_file, file_name, file_intent, H5P_FILE_CREATE_DEFAULT, fapl_id);
+
+        /* Adjust temporary file name if file not opened */
+        if(NULL == src_file) {
+            char *ptr;
+
+            /* Reset the error stack */
+            H5E_clear_stack(NULL);
+
+            /* Get last component of file_name */
+            H5_GET_LAST_DELIMITER(file_name, ptr)
+            HDassert(ptr);
+
+            /* Increment past delimiter */
+            ptr++;
+
+            /* Copy into the temp. file name */
+            HDstrncpy(temp_file_name, ptr, temp_file_name_len);
+            temp_file_name[temp_file_name_len - 1] = '\0';
+        } /* end if */
+    } /* end if */
+    else if(H5_CHECK_ABS_DRIVE(file_name)) {
+        /* Try opening file */
+        src_file = H5F__efc_open(primary_file, file_name, file_intent, H5P_FILE_CREATE_DEFAULT, fapl_id);
+
+        /* Adjust temporary file name if file not opened */
+        if(NULL == src_file) {
+            /* Reset the error stack */
+            H5E_clear_stack(NULL);
+
+            /* Strip "<drive-letter>:" */
+            HDstrncpy(temp_file_name, &file_name[2], temp_file_name_len);
+            temp_file_name[temp_file_name_len - 1] = '\0';
+        } /* end if */
+    } /* end if */
+
+    /* Try searching from paths set in the environment variable */
+    if(src_file == NULL) {
+        char *env_prefix;
+
+        /* Get the appropriate environment variable */
+        if(H5F_PREFIX_VDS == prefix_type)
+            env_prefix = HDgetenv("HDF5_VDS_PREFIX");
+        else if(H5F_PREFIX_ELINK == prefix_type)
+            env_prefix = HDgetenv("HDF5_EXT_PREFIX");
+        else
+            HGOTO_ERROR(H5E_FILE, H5E_BADTYPE, NULL, "prefix type is not sensible")
+
+        /* If environment variable is defined, iterate through prefixes it defines */
+        if(NULL != env_prefix) {
+            char *tmp_env_prefix, *saved_env;
+
+            /* Make a copy of the environment variable string */
+            if(NULL == (saved_env = tmp_env_prefix = H5MM_strdup(env_prefix)))
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+
+            /* Loop over prefixes in environment variable */
+            while((tmp_env_prefix) && (*tmp_env_prefix)) {
+                char *out_prefix_name;
+
+                out_prefix_name = H5F__getenv_prefix_name(&tmp_env_prefix/*in,out*/);
+                if(out_prefix_name && (*out_prefix_name)) {
+                    if(H5F__build_name(out_prefix_name, temp_file_name, &full_name/*out*/) < 0) {
+                        saved_env = (char *)H5MM_xfree(saved_env);
+                        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't prepend prefix to filename")
+                    } /* end if */
+
+                    /* Try opening file */
+                    src_file = H5F__efc_open(primary_file, full_name, file_intent, H5P_FILE_CREATE_DEFAULT, fapl_id);
+
+                    /* Release copy of file name */
+                    full_name = (char *)H5MM_xfree(full_name);
+
+                    /* Check for file not opened */
+                    if(NULL == src_file)
+                        /* Reset the error stack */
+                        H5E_clear_stack(NULL);
+                    /* Leave if file was opened */
+                    else
+                        break;
+                } /* end if */
+            } /* end while */
+
+            saved_env = (char *)H5MM_xfree(saved_env);
+        } /* end if */
+    } /* end if */
+
+    /* Try searching from property list */
+    if(src_file == NULL && prop_prefix) {
+        /* Construct name to open */
+        if(H5F__build_name(prop_prefix, temp_file_name, &full_name/*out*/) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't prepend prefix to filename")
+
+        /* Try opening file */
+        src_file = H5F__efc_open(primary_file, full_name, file_intent, H5P_FILE_CREATE_DEFAULT, fapl_id);
+
+        /* Release name */
+        full_name = (char *)H5MM_xfree(full_name);
+
+        /* Check for file not opened */
+        if(NULL == src_file)
+            /* Reset the error stack */
+            H5E_clear_stack(NULL);
+    } /* end if */
+
+    /* Try searching from main file's "extpath": see description in H5F_open() & H5_build_extpath() */
+    if(src_file == NULL) {
+        char *dspath;
+
+        if(NULL != (dspath = H5F_EXTPATH(primary_file))) {
+            /* Construct name to open */
+            if(H5F__build_name(dspath, temp_file_name, &full_name/*out*/) < 0)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't prepend prefix to filename")
+
+            /* Try opening file */
+            src_file = H5F__efc_open(primary_file, full_name, file_intent, H5P_FILE_CREATE_DEFAULT, fapl_id);
+
+            /* Release name */
+            full_name = (char *)H5MM_xfree(full_name);
+
+            /* Check for file not opened */
+            if(NULL == src_file)
+                /* Reset the error stack */
+                H5E_clear_stack(NULL);
+        } /* end if */
+    } /* end if */
+
+    /* Try the relative file_name stored in temp_file_name */
+    if(src_file == NULL) {
+        /* Try opening file */
+        src_file = H5F__efc_open(primary_file, temp_file_name, file_intent, H5P_FILE_CREATE_DEFAULT, fapl_id);
+
+        /* Check for file not opened */
+        if(NULL == src_file)
+            /* Reset the error stack */
+            H5E_clear_stack(NULL);
+    } /* end if */
+
+    /* try the 'resolved' name for the virtual file */
+    if(src_file == NULL) {
+        char *ptr = NULL;
+
+        /* Copy resolved file name */
+        if(NULL == (actual_file_name = H5MM_strdup(H5F_ACTUAL_NAME(primary_file))))
+            HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, NULL, "can't duplicate resolved file name string")
+
+        /* get last component of file_name */
+        H5_GET_LAST_DELIMITER(actual_file_name, ptr)
+        if(!ptr)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file, file name = '%s', temp_file_name = '%s'", file_name, temp_file_name)
+
+        /* Truncate filename portion from actual file name path */
+        *ptr = '\0';
+
+        /* Build new file name for the external file */
+        if(H5F__build_name(actual_file_name, temp_file_name, &full_name/*out*/) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't prepend prefix to filename")
+        actual_file_name = (char *)H5MM_xfree(actual_file_name);
+
+        /* Try opening with the resolved name */
+        src_file = H5F__efc_open(primary_file, full_name, file_intent, H5P_FILE_CREATE_DEFAULT, fapl_id);
+
+        /* Release name */
+        full_name = (char *)H5MM_xfree(full_name);
+
+        /* Check for file not opened */
+        if(NULL == src_file)
+            /* Reset the error stack */
+            H5E_clear_stack(NULL);
+    } /* end if */
+
+    /* Success */
+    ret_value = src_file;
+
+done:
+    if((NULL == ret_value) && src_file)
+        if(H5F_efc_close(primary_file, src_file) < 0)
+            HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, NULL, "can't close source file")
+    if(full_name)
+        full_name = (char *)H5MM_xfree(full_name);
+    if(temp_file_name)
+        temp_file_name = (char *)H5MM_xfree(temp_file_name);
+    if(actual_file_name)
+        actual_file_name = (char *)H5MM_xfree(actual_file_name);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5F_prefix_open_file() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5F__is_hdf5
  *
- *		Failure:	Negative
+ * Purpose:  Check the file signature to detect an HDF5 file.
  *
- * Programmer:	Unknown
+ * Bugs:     This function is not robust: it only uses the default file
+ *           driver when attempting to open the file when in fact it
+ *           should use all known file drivers.
  *
+ * Return:   Success:    TRUE/FALSE
+ * *         Failure:    Negative
  *-------------------------------------------------------------------------
  */
 htri_t
-H5F__is_hdf5(const char *name, hid_t meta_dxpl_id, hid_t raw_dxpl_id)
+H5F__is_hdf5(const char *name)
 {
-    H5FD_t	*file = NULL;           /* Low-level file struct */
-    H5FD_io_info_t fdio_info;           /* File driver I/O info */
-    haddr_t     sig_addr;               /* Addess of hdf5 file signature */
-    htri_t	ret_value = FAIL;       /* Return value */
+    H5FD_t    *file = NULL;            /* Low-level file struct */
+    haddr_t    sig_addr;               /* Addess of hdf5 file signature */
+    htri_t     ret_value = FAIL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Open the file at the virtual file layer */
     if(NULL == (file = H5FD_open(name, H5F_ACC_RDONLY, H5P_FILE_ACCESS_DEFAULT, HADDR_UNDEF)))
-	HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to open file")
-
-    /* Set up the file driver info */
-    fdio_info.file = file;
-    if(NULL == (fdio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(meta_dxpl_id)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get new property list object")
-    if(NULL == (fdio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(raw_dxpl_id)))
-        HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get new property list object")
+        HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to open file")
 
     /* The file is an hdf5 file if the hdf5 file signature can be found */
-    if(H5FD_locate_signature(&fdio_info, &sig_addr) < 0)
+    if(H5FD_locate_signature(file, &sig_addr) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable to locate file signature")
     ret_value = (HADDR_UNDEF != sig_addr);
 
@@ -551,36 +813,28 @@ done:
         if(H5FD_close(file) < 0 && ret_value >= 0)
             HDONE_ERROR(H5E_IO, H5E_CANTCLOSEFILE, FAIL, "unable to close file")
 
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5F__is_hdf5() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_new
- *
- * Purpose:	Creates a new file object and initializes it.  The
- *		H5Fopen and H5Fcreate functions then fill in various
- *		fields.	 If SHARED is a non-null pointer then the shared info
- *		to which it points has the reference count incremented.
- *		Otherwise a new, empty shared info struct is created and
- *		initialized with the specified file access property list.
- *
- * Errors:
- *
- * Return:	Success:	Ptr to a new file struct.
+ * Function: H5F_new
  *
- *		Failure:	NULL
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jul 18 1997
+ * Purpose:  Creates a new file object and initializes it.  The
+ *           H5Fopen and H5Fcreate functions then fill in various fields.
+ *           If SHARED is a non-null pointer then the shared info
+ *           to which it points has the reference count incremented.
+ *           Otherwise a new, empty shared info struct is created and
+ *           initialized with the specified file access property list.
  *
+ * Return:   Success:    Ptr to a new file struct.
+ *           Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5F_t *
 H5F_new(H5F_file_t *shared, unsigned flags, hid_t fcpl_id, hid_t fapl_id, H5FD_t *lf)
 {
-    H5F_t	*f = NULL, *ret_value = NULL;
+    H5F_t    *f = NULL, *ret_value = NULL;
 
     FUNC_ENTER_NOAPI_NOINIT
 
@@ -594,8 +848,7 @@ H5F_new(H5F_file_t *shared, unsigned flags, hid_t fcpl_id, hid_t fapl_id, H5FD_t
     } /* end if */
     else {
         H5P_genplist_t *plist;          /* Property list */
-        unsigned        efc_size;       /* External file cache size */
-        hbool_t	latest_format;	        /* Always use the latest format?	*/
+        unsigned efc_size;              /* External file cache size */
         size_t u;                       /* Local index variable */
 
         HDassert(lf != NULL);
@@ -652,7 +905,7 @@ H5F_new(H5F_file_t *shared, unsigned flags, hid_t fcpl_id, hid_t fapl_id, H5FD_t
             HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get file space page size")
         HDassert(f->shared->fs_page_size >= H5F_FILE_SPACE_PAGE_SIZE_MIN);
 
-        /* Temporary for multi/split drivers: fail file creation 
+        /* Temporary for multi/split drivers: fail file creation
              when persisting free-space or using paged aggregation strategy */
         if(H5F_HAS_FEATURE(f, H5FD_FEAT_PAGED_AGGR))
             if(f->shared->fs_strategy == H5F_FSPACE_STRATEGY_PAGE || f->shared->fs_persist)
@@ -677,11 +930,10 @@ H5F_new(H5F_file_t *shared, unsigned flags, hid_t fcpl_id, hid_t fapl_id, H5FD_t
             HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get garbage collect reference")
         if(H5P_get(plist, H5F_ACS_SIEVE_BUF_SIZE_NAME, &(f->shared->sieve_buf_size)) < 0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get sieve buffer size")
-        if(H5P_get(plist, H5F_ACS_LATEST_FORMAT_NAME, &latest_format) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get 'latest format' flag")
-        /* For latest format or SWMR_WRITE, activate all latest version support */
-        if(latest_format || (H5F_INTENT(f) & H5F_ACC_SWMR_WRITE))
-            f->shared->latest_flags |= H5F_LATEST_ALL_FLAGS;
+        if(H5P_get(plist, H5F_ACS_LIBVER_LOW_BOUND_NAME, &(f->shared->low_bound)) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get 'low' bound for library format versions")
+        if(H5P_get(plist, H5F_ACS_LIBVER_HIGH_BOUND_NAME, &(f->shared->high_bound)) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get 'high' bound for library format versions")
         if(H5P_get(plist, H5F_ACS_USE_MDC_LOGGING_NAME, &(f->shared->use_mdc_logging)) < 0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, NULL, "can't get 'use mdc logging' flag")
         if(H5P_get(plist, H5F_ACS_START_MDC_LOG_ON_ACCESS_NAME, &(f->shared->start_mdc_log_on_access)) < 0)
@@ -717,10 +969,6 @@ H5F_new(H5F_file_t *shared, unsigned flags, hid_t fcpl_id, hid_t fapl_id, H5FD_t
         if(!H5F_HAS_FEATURE(f, H5FD_FEAT_SUPPORTS_SWMR_IO) && (H5F_INTENT(f) & (H5F_ACC_SWMR_WRITE | H5F_ACC_SWMR_READ)))
             HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "must use a SWMR-compatible VFD when SWMR is specified")
 
-        /* Require a POSIX compatible VFD to use SWMR feature */
-        /* (It's reasonable to try to expand this to other VFDs eventually -QAK) */
-        if(!H5F_HAS_FEATURE(f, H5FD_FEAT_POSIX_COMPAT_HANDLE) && (H5F_INTENT(f) & (H5F_ACC_SWMR_WRITE | H5F_ACC_SWMR_READ)))
-            HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, NULL, "must use POSIX compatible VFD with SWMR write access")
         if(H5FD_get_fs_type_map(lf, f->shared->fs_type_map) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't get free space type mapping from VFD")
         if(H5MF_init_merge_flags(f) < 0)
@@ -814,7 +1062,7 @@ done:
         if(!shared) {
             /* Attempt to clean up some of the shared file structures */
             if(f->shared->efc)
-                if(H5F_efc_destroy(f->shared->efc) < 0)
+                if(H5F__efc_destroy(f->shared->efc) < 0)
                     HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, NULL, "can't destroy external file cache")
             if(f->shared->fcpl_id > 0)
                 if(H5I_dec_ref(f->shared->fcpl_id) < 0)
@@ -830,25 +1078,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F__dest
- *
- * Purpose:	Destroys a file structure.  This function flushes the cache
- *		but doesn't do any other cleanup other than freeing memory
- *		for the file struct.  The shared info for the file is freed
- *		only when its reference count reaches zero.
+ * Function: H5F__dest
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jul 18 1997
+ * Purpose:  Destroys a file structure.  This function flushes the cache
+ *           but doesn't do any other cleanup other than freeing memory
+ *           for the file struct.  The shared info for the file is freed
+ *           only when its reference count reaches zero.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
+H5F__dest(H5F_t *f, hbool_t flush)
 {
-    herr_t	   ret_value = SUCCEED;         /* Return value */
+    herr_t       ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
 
@@ -858,22 +1101,21 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
 
     if(1 == f->shared->nrefs) {
         int actype;                         /* metadata cache type (enum value) */
-        H5F_io_info2_t fio_info;            /* I/O info for operation */
 
         /* Flush at this point since the file will be closed (phase 1).
          * Only try to flush the file if it was opened with write access, and if
          * the caller requested a flush.
          */
         if((H5F_ACC_RDWR & H5F_INTENT(f)) && flush)
-            if(H5F__flush_phase1(f, meta_dxpl_id) < 0)
+            if(H5F__flush_phase1(f) < 0)
                 /* Push error, but keep going*/
                 HDONE_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush cached data (phase 1)")
 
         /* Notify the metadata cache that the file is about to be closed.
-         * This allows the cache to set up for creating a metadata cache 
+         * This allows the cache to set up for creating a metadata cache
          * image if this has been requested.
          */
-        if(H5AC_prep_for_file_close(f, meta_dxpl_id) < 0)
+        if(H5AC_prep_for_file_close(f) < 0)
             /* Push error, but keep going */
             HDONE_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "metadata cache prep for close failed")
 
@@ -882,12 +1124,12 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
          * the caller requested a flush.
          */
         if((H5F_ACC_RDWR & H5F_INTENT(f)) && flush)
-            if(H5F__flush_phase2(f, meta_dxpl_id, raw_dxpl_id, TRUE) < 0)
+            if(H5F__flush_phase2(f, TRUE) < 0)
                 /* Push error, but keep going */
                 HDONE_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush cached data (phase 2)")
 
         /* With the shutdown modifications, the contents of the metadata cache
-         * should be clean at this point, with the possible exception of the 
+         * should be clean at this point, with the possible exception of the
          * the superblock and superblock extension.
          *
          * Verify this.
@@ -896,7 +1138,7 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
 
         /* Release the external file cache */
         if(f->shared->efc) {
-            if(H5F_efc_destroy(f->shared->efc) < 0)
+            if(H5F__efc_destroy(f->shared->efc) < 0)
                 /* Push error, but keep going*/
                 HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't destroy external file cache")
             f->shared->efc = NULL;
@@ -913,10 +1155,10 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
         /* Release objects that depend on the superblock being initialized */
         if(f->shared->sblock) {
             /* Shutdown file free space manager(s) */
-            /* (We should release the free space information now (before 
-             *      truncating the file and before the metadata cache is shut 
-             *      down) since the free space manager is holding some data 
-             *      structures in memory and also because releasing free space 
+            /* (We should release the free space information now (before
+             *      truncating the file and before the metadata cache is shut
+             *      down) since the free space manager is holding some data
+             *      structures in memory and also because releasing free space
              *      can shrink the file's 'eoa' value)
              *
              * Update 11/1/16:
@@ -929,7 +1171,7 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
              *                                          -- JRM
              */
             if(H5F_ACC_RDWR & H5F_INTENT(f)) {
-                if(H5MF_close(f, meta_dxpl_id) < 0)
+                if(H5MF_close(f) < 0)
                     /* Push error, but keep going*/
                     HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release file free space info")
 
@@ -942,28 +1184,28 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
                  * free space manager may dirty some data structures again.
                  */
                 if(flush) {
-		    /* Clear status_flags */
+                    /* Clear status_flags */
                     f->shared->sblock->status_flags &= (uint8_t)(~H5F_SUPER_WRITE_ACCESS);
                     f->shared->sblock->status_flags &= (uint8_t)(~H5F_SUPER_SWMR_WRITE_ACCESS);
 
                     /* Mark EOA info dirty in cache, so change will get encoded */
-                    if(H5F_eoa_dirty(f, meta_dxpl_id) < 0)
+                    if(H5F_eoa_dirty(f) < 0)
                         /* Push error, but keep going*/
                         HDONE_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
 
-                    /* Release any space allocated to space aggregators, 
-                     * so that the eoa value corresponds to the end of the 
+                    /* Release any space allocated to space aggregators,
+                     * so that the eoa value corresponds to the end of the
                      * space written to in the file.
                      *
                      * At most, this should change the superblock or the
                      * superblock extension messages.
                      */
-                    if(H5MF_free_aggrs(f, meta_dxpl_id) < 0)
+                    if(H5MF_free_aggrs(f) < 0)
                         /* Push error, but keep going*/
                         HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release file space")
 
                     /* Truncate the file to the current allocated size */
-                    if(H5FD_truncate(f->shared->lf, meta_dxpl_id, TRUE) < 0)
+                    if(H5FD_truncate(f->shared->lf, TRUE) < 0)
                         /* Push error, but keep going*/
                         HDONE_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "low level truncate failed")
 
@@ -971,11 +1213,11 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
                      * extension should be dirty.
                      */
                     HDassert(H5AC_cache_is_clean(f, H5AC_RING_MDFSM));
-		} /* end if */
+                } /* end if */
             } /* end if */
 
             /* if it exists, unpin the driver information block cache entry,
-             * since we're about to destroy the cache 
+             * since we're about to destroy the cache
              */
             if(f->shared->drvinfo)
                 if(H5AC_unpin_entry(f->shared->drvinfo) < 0)
@@ -995,26 +1237,22 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
          * Verify this.
          */
         HDassert(H5AC_cache_is_clean(f, H5AC_RING_MDFSM));
- 
+
         /* Remove shared file struct from list of open files */
         if(H5F_sfile_remove(f->shared) < 0)
             /* Push error, but keep going*/
             HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file")
 
         /* Shutdown the metadata cache */
-        if(H5AC_dest(f, meta_dxpl_id))
+        /* (Flushes any remaining dirty entries, which should only be the
+         *      superblock and / or driver info at this point)
+         */
+        if(H5AC_dest(f))
             /* Push error, but keep going*/
             HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file")
 
-        /* Set up I/O info for operation */
-        fio_info.f = f;
-        if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(meta_dxpl_id)))
-            HDONE_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-            HDONE_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-
         /* Shutdown the page buffer cache */
-        if(H5PB_dest(&fio_info) < 0)
+        if(H5PB_dest(f) < 0)
             /* Push error, but keep going*/
             HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing page buffer cache")
 
@@ -1035,7 +1273,7 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
         } /* end if */
 
         /* Destroy other components of the file */
-        if(H5F__accum_reset(&fio_info, TRUE) < 0)
+        if(H5F__accum_reset(f, TRUE) < 0)
             /* Push error, but keep going*/
             HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "problems closing file")
         if(H5FO_dest(f) < 0)
@@ -1071,7 +1309,8 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
         /* Destroy shared file struct */
         f->shared = (H5F_file_t *)H5FL_FREE(H5F_file_t, f->shared);
 
-    } else if(f->shared->nrefs > 0) {
+    }
+    else if(f->shared->nrefs > 0) {
         /*
          * There are other references to the shared part of the file.
          * Only decrement the reference count.
@@ -1089,46 +1328,118 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
     f = H5FL_FREE(H5F_t, f);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_dest() */
+} /* end H5F__dest() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_open
+ * Function:    H5F__create
+ *
+ * Purpose:     Internal routine to create a file.
  *
- * Purpose:	Opens (or creates) a file.  This function understands the
- *		following flags which are similar in nature to the Posix
- *		open(2) flags.
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              creating files that can set up VOL / SWMR info
+ *              (which need a DXPL).
  *
- *		H5F_ACC_RDWR:	Open with read/write access. If the file is
- *				currently open for read-only access then it
- *				will be reopened. Absence of this flag
- *				implies read-only access.
+ * Return:      Success:    Non-NULL, pointer to new file object.
+ *              Failure:    NULL
  *
- *		H5F_ACC_CREAT:	Create a new file if it doesn't exist yet.
- *				The permissions are 0666 bit-wise AND with
- *				the current umask.  H5F_ACC_WRITE must also
- *				be specified.
+ * Programmer:	Quincey Koziol
+ *		December 13, 2017
  *
- *		H5F_ACC_EXCL:	This flag causes H5F_open() to fail if the
- *				file already exists.
+ *-------------------------------------------------------------------------
+ */
+H5F_t *
+H5F__create(const char *filename, unsigned flags, hid_t fcpl_id, hid_t fapl_id)
+{
+    H5F_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(filename);
+
+    /* Create a new file or truncate an existing file. */
+    if(NULL == (ret_value = H5F_open(filename, flags, fcpl_id, fapl_id)))
+        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5F__create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__open
  *
- *		H5F_ACC_TRUNC:	The file is truncated and a new HDF5 superblock
- *				is written.  This operation will fail if the
- *				file is already open.
+ * Purpose:     Internal routine to open a file.
  *
- *		Unlinking the file name from the group directed graph while
- *		the file is opened causes the file to continue to exist but
- *		one will not be able to upgrade the file from read-only
- *		access to read-write access by reopening it. Disk resources
- *		for the file are released when all handles to the file are
- *		closed. NOTE: This paragraph probably only applies to Unix;
- *		deleting the file name in other OS's has undefined results.
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              opening files that can set up VOL / SWMR info
+ *              (which need a DXPL).
  *
- *		The CREATE_PARMS argument is optional.	A null pointer will
- *		cause the default file creation parameters to be used.
+ * Return:      Success:    Non-NULL, pointer to new file object.
+ *              Failure:    NULL
  *
- *		The ACCESS_PARMS argument is optional.  A null pointer will
- *		cause the default file access parameters to be used.
+ * Programmer:	Quincey Koziol
+ *		December 13, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+H5F_t *
+H5F__open(const char *filename, unsigned flags, hid_t fcpl_id, hid_t fapl_id)
+{
+    H5F_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(filename);
+
+    /* Open the file */
+    if(NULL == (ret_value = H5F_open(filename, flags, fcpl_id, fapl_id)))
+        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to open file")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5F__open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F_open
+ *
+ * Purpose:    Opens (or creates) a file.  This function understands the
+ *        following flags which are similar in nature to the Posix
+ *        open(2) flags.
+ *
+ *        H5F_ACC_RDWR:    Open with read/write access. If the file is
+ *                currently open for read-only access then it
+ *                will be reopened. Absence of this flag
+ *                implies read-only access.
+ *
+ *        H5F_ACC_CREAT:    Create a new file if it doesn't exist yet.
+ *                The permissions are 0666 bit-wise AND with
+ *                the current umask.  H5F_ACC_WRITE must also
+ *                be specified.
+ *
+ *        H5F_ACC_EXCL:    This flag causes H5F_open() to fail if the
+ *                file already exists.
+ *
+ *        H5F_ACC_TRUNC:    The file is truncated and a new HDF5 superblock
+ *                is written.  This operation will fail if the
+ *                file is already open.
+ *
+ *        Unlinking the file name from the group directed graph while
+ *        the file is opened causes the file to continue to exist but
+ *        one will not be able to upgrade the file from read-only
+ *        access to read-write access by reopening it. Disk resources
+ *        for the file are released when all handles to the file are
+ *        closed. NOTE: This paragraph probably only applies to Unix;
+ *        deleting the file name in other OS's has undefined results.
+ *
+ *        The CREATE_PARMS argument is optional.    A null pointer will
+ *        cause the default file creation parameters to be used.
+ *
+ *        The ACCESS_PARMS argument is optional.  A null pointer will
+ *        cause the default file access parameters to be used.
  *
  * The following two tables show results of file opens for single and concurrent access:
  *
@@ -1161,17 +1472,12 @@ H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush)
  *        s: the open succeeds with flags combination from both the first and second opens
  *
  *
- * Return:	Success:	A new file pointer.
- *		Failure:	NULL
- *
- * Programmer:	Robb Matzke
- *		Tuesday, September 23, 1997
- *
+ * Return:    Success:    A new file pointer.
+ *        Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5F_t *
-H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
-    hid_t meta_dxpl_id)
+H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id)
 {
     H5F_t              *file = NULL;        /*the success return value      */
     H5F_file_t         *shared = NULL;      /*shared part of `file'         */
@@ -1180,16 +1486,17 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
     H5FD_class_t       *drvr;               /*file driver class info        */
     H5P_genplist_t     *a_plist;            /*file access property list     */
     H5F_close_degree_t  fc_degree;          /*file close degree             */
-    hid_t               raw_dxpl_id = H5AC_rawdata_dxpl_id;    /* Raw data dxpl used by library        */
     size_t              page_buf_size;
     unsigned            page_buf_min_meta_perc;
     unsigned            page_buf_min_raw_perc;
     hbool_t             set_flag = FALSE;   /*set the status_flags in the superblock */
-    hbool_t             clear = FALSE;      /*clear the status_flags 	    */
+    hbool_t             clear = FALSE;      /*clear the status_flags         */
     hbool_t             evict_on_close;     /* evict on close value from plist  */
-    H5F_t              *ret_value = NULL;   /*actual return value           */
     char               *lock_env_var = NULL;/*env var pointer               */
     hbool_t             use_file_locking;   /*read from env var             */
+    hbool_t             ci_load = FALSE;    /* whether MDC ci load requested */
+    hbool_t             ci_write = FALSE;   /* whether MDC CI write requested */
+    H5F_t              *ret_value = NULL;   /*actual return value           */
 
     FUNC_ENTER_NOAPI(NULL)
 
@@ -1212,7 +1519,7 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
     if(lock_env_var && !HDstrcmp(lock_env_var, "FALSE"))
         use_file_locking = FALSE;
     else
-        use_file_locking = TRUE;    
+        use_file_locking = TRUE;
 
     /*
      * Opening a file is a two step process. First we try to open the
@@ -1301,8 +1608,8 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
         /* Place an advisory lock on the file */
         if(use_file_locking)
             if(H5FD_lock(lf, (hbool_t)((flags & H5F_ACC_RDWR) ? TRUE : FALSE)) < 0) {
-                /* Locking failed - Closing will remove the lock */                
-                if(H5FD_close(lf) < 0) 
+                /* Locking failed - Closing will remove the lock */
+                if(H5FD_close(lf) < 0)
                     HDONE_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to close low-level file info")
                 HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to lock the file")
             } /* end if */
@@ -1313,7 +1620,7 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
              * returned is NULL, H5FD_close() will never be called via H5F_dest()
              * so we have to close lf here before heading to the error handling.
              */
-            if(H5FD_close(lf) < 0) 
+            if(H5FD_close(lf) < 0)
                 HDONE_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to close low-level file info")
             HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to initialize file structure")
         } /* end if */
@@ -1323,6 +1630,12 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
             set_flag = TRUE;
     } /* end else */
 
+    /* Check to see if both SWMR and cache image are requested.  Fail if so */
+    if(H5C_cache_image_status(file, &ci_load, &ci_write) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, NULL, "can't get MDC cache image status")
+    if((ci_load || ci_write) && (flags & (H5F_ACC_SWMR_READ | H5F_ACC_SWMR_WRITE)))
+        HGOTO_ERROR(H5E_FILE, H5E_UNSUPPORTED, NULL, "can't have both SWMR and cache image")
+
     /* Retain the name the file was opened with */
     file->open_name = H5MM_xstrdup(name);
 
@@ -1370,19 +1683,19 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
 
         /* Initialize information about the superblock and allocate space for it */
         /* (Writes superblock extension messages, if there are any) */
-        if(H5F__super_init(file, meta_dxpl_id) < 0)
+        if(H5F__super_init(file) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to allocate file superblock")
 
         /* Create and open the root group */
         /* (This must be after the space for the superblock is allocated in
          *      the file, since the superblock must be at offset 0)
          */
-        if(H5G_mkroot(file, meta_dxpl_id, TRUE) < 0)
+        if(H5G_mkroot(file, TRUE) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create/open root group")
     } /* end if */
     else if (1 == shared->nrefs) {
         /* Read the superblock if it hasn't been read before. */
-        if(H5F__super_read(file, meta_dxpl_id, raw_dxpl_id, TRUE) < 0)
+        if(H5F__super_read(file, a_plist, TRUE) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_READERROR, NULL, "unable to read superblock")
 
         /* Create the page buffer before initializing the superblock */
@@ -1391,7 +1704,7 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
                 HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, NULL, "unable to create page buffer")
 
         /* Open the root group */
-        if(H5G_mkroot(file, meta_dxpl_id, FALSE) < 0)
+        if(H5G_mkroot(file, FALSE) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to read root group")
     } /* end if */
 
@@ -1462,14 +1775,16 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
             if(H5F_INTENT(file) & H5F_ACC_SWMR_WRITE)
                 file->shared->sblock->status_flags |= H5F_SUPER_SWMR_WRITE_ACCESS;
 
-            /* Flush the superblock */
+            /* Flush the superblock & superblock extension */
             if(H5F_super_dirty(file) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, NULL, "unable to mark superblock as dirty")
-            if(H5F_flush_tagged_metadata(file, H5AC__SUPERBLOCK_TAG, meta_dxpl_id) < 0)
+            if(H5F_flush_tagged_metadata(file, H5AC__SUPERBLOCK_TAG) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, NULL, "unable to flush superblock")
+            if(H5F_flush_tagged_metadata(file, file->shared->sblock->ext_addr) < 0)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, NULL, "unable to flush superblock extension")
 
             /* Remove the file lock for SWMR_WRITE */
-            if(use_file_locking && (H5F_INTENT(file) & H5F_ACC_SWMR_WRITE)) { 
+            if(use_file_locking && (H5F_INTENT(file) & H5F_ACC_SWMR_WRITE)) {
                 if(H5FD_unlock(file->shared->lf) < 0)
                     HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "unable to unlock the file")
             } /* end if */
@@ -1477,11 +1792,11 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
         else { /* H5F_ACC_RDONLY: check consistency of status_flags */
             /* Skip check of status_flags for file with < superblock version 3 */
             if(file->shared->sblock->super_vers >= HDF5_SUPERBLOCK_VERSION_3) {
-                if(H5F_INTENT(file) & H5F_ACC_SWMR_READ) { 
-                    if((file->shared->sblock->status_flags & H5F_SUPER_WRITE_ACCESS && 
+                if(H5F_INTENT(file) & H5F_ACC_SWMR_READ) {
+                    if((file->shared->sblock->status_flags & H5F_SUPER_WRITE_ACCESS &&
                             !(file->shared->sblock->status_flags & H5F_SUPER_SWMR_WRITE_ACCESS))
-                            || 
-                            (!(file->shared->sblock->status_flags & H5F_SUPER_WRITE_ACCESS) && 
+                            ||
+                            (!(file->shared->sblock->status_flags & H5F_SUPER_WRITE_ACCESS) &&
                             file->shared->sblock->status_flags & H5F_SUPER_SWMR_WRITE_ACCESS))
                         HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, NULL, "file is not already open for SWMR writing")
                 } /* end if */
@@ -1497,27 +1812,23 @@ H5F_open(const char *name, unsigned flags, hid_t fcpl_id, hid_t fapl_id,
 
 done:
     if((NULL == ret_value) && file)
-        if(H5F__dest(file, meta_dxpl_id, raw_dxpl_id, FALSE) < 0)
+        if(H5F__dest(file, FALSE) < 0)
             HDONE_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, NULL, "problems closing file")
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5F_open() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_flush_phase1
+ * Function: H5F_flush_phase1
  *
- * Purpose:	First phase of flushing cached data.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@lbl.gov
- *		Jan  1 2017
+ * Purpose:  First phase of flushing cached data.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F__flush_phase1(H5F_t *f, hid_t meta_dxpl_id)
+H5F__flush_phase1(H5F_t *f)
 {
     herr_t   ret_value = SUCCEED;       /* Return value */
 
@@ -1527,7 +1838,7 @@ H5F__flush_phase1(H5F_t *f, hid_t meta_dxpl_id)
     HDassert(f);
 
     /* Flush any cached dataset storage raw data */
-    if(H5D_flush(f, meta_dxpl_id) < 0)
+    if(H5D_flush_all(f) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush dataset cache")
 
@@ -1537,7 +1848,7 @@ H5F__flush_phase1(H5F_t *f, hid_t meta_dxpl_id)
     /* (needs to happen before cache flush, with superblock write, since the
      *  'eoa' value is written in superblock -QAK)
      */
-    if(H5MF_free_aggrs(f, meta_dxpl_id) < 0)
+    if(H5MF_free_aggrs(f) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't release file space")
 
@@ -1546,22 +1857,16 @@ H5F__flush_phase1(H5F_t *f, hid_t meta_dxpl_id)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F__flush_phase2
- *
- * Purpose:	Second phase of flushing cached data.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5F__flush_phase2
  *
- * Programmer:	Quincey Koziol
- *		koziol@lbl.gov
- *		Jan  1 2017
+ * Purpose:  Second phase of flushing cached data.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F__flush_phase2(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t closing)
+H5F__flush_phase2(H5F_t *f, hbool_t closing)
 {
-    H5F_io_info2_t fio_info;            /* I/O info for operation */
     herr_t   ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_STATIC
@@ -1570,41 +1875,48 @@ H5F__flush_phase2(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t closi
     HDassert(f);
 
     /* Flush the entire metadata cache */
-    if(H5AC_flush(f, meta_dxpl_id) < 0)
+    if(H5AC_flush(f) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush metadata cache")
 
+#ifdef H5_HAVE_PARALLEL
+    if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI))
+        /* Since we just returned from a call to H5AC_flush(), we just 
+         * passed through a barrier.  Hence we can skip the barrier on 
+         * entry to the mpio file driver truncate call below, and the first
+         * barrier in the following call to flush the cache again.
+         */
+        H5CX_set_mpi_file_flushing(TRUE);
+#endif /* H5_HAVE_PARALLEL */
+
     /* Truncate the file to the current allocated size */
-    if(H5FD_truncate(f->shared->lf, meta_dxpl_id, closing) < 0)
+    if(H5FD_truncate(f->shared->lf, closing) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "low level truncate failed")
 
     /* Flush the entire metadata cache again since the EOA could have changed in the truncate call. */
-    if(H5AC_flush(f, meta_dxpl_id) < 0)
+    if(H5AC_flush(f) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush metadata cache")
 
-    /* Set up I/O info for operation */
-    fio_info.f = f;
-    if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(meta_dxpl_id)))
-        /* Push error, but keep going*/
-        HDONE_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(raw_dxpl_id)))
-        /* Push error, but keep going*/
-        HDONE_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
+#ifdef H5_HAVE_PARALLEL
+    if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI))
+        /* Reset the "flushing the file" flag */
+        H5CX_set_mpi_file_flushing(FALSE);
+#endif /* H5_HAVE_PARALLEL */
 
     /* Flush out the metadata accumulator */
-    if(H5F__accum_flush(&fio_info) < 0)
+    if(H5F__accum_flush(f) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "unable to flush metadata accumulator")
 
     /* Flush the page buffer */
-    if(H5PB_flush(&fio_info) < 0)
+    if(H5PB_flush(f) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "page buffer flush failed")
 
     /* Flush file buffers to disk. */
-    if(H5FD_flush(f->shared->lf, meta_dxpl_id, closing) < 0)
+    if(H5FD_flush(f->shared->lf, closing) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_IO, H5E_CANTFLUSH, FAIL, "low level flush failed")
 
@@ -1613,20 +1925,15 @@ H5F__flush_phase2(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t closi
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F__flush
- *
- * Purpose:	Flushes cached data.
+ * Function: H5F__flush_real
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug 29 1997
+ * Purpose:  Flushes cached data.
  *
+ * Return:   SUCCEED/FAIL
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__flush(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t closing)
+H5F__flush_real(H5F_t *f)
 {
     herr_t   ret_value = SUCCEED;       /* Return value */
 
@@ -1636,49 +1943,136 @@ H5F__flush(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t closing)
     HDassert(f);
 
     /* First phase of flushing data */
-    if(H5F__flush_phase1(f, meta_dxpl_id) < 0)
+    if(H5F__flush_phase1(f) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush file data")
 
     /* Second phase of flushing data */
-    if(H5F__flush_phase2(f, meta_dxpl_id, raw_dxpl_id, closing) < 0)
+    if(H5F__flush_phase2(f, FALSE) < 0)
         /* Push error, but keep going*/
         HDONE_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush file data")
 
     FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5F__flush_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__flush
+ *
+ * Purpose:     Internal routine to flush a file.
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              flushing files that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:      Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		December 13, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__flush(H5F_t *f, H5F_scope_t scope)
+{
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(f->shared);
+
+    /* Flush other files, depending on scope */
+    if(H5F_SCOPE_GLOBAL == scope) {
+        /* Call the flush routine for mounted file hierarchies */
+        if(H5F_flush_mounts(f) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush mounted file hierarchy")
+    } /* end if */
+    else
+        /* Call the flush routine, for this file */
+        if(H5F__flush_real(f) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5F__flush() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_close
+ * Function:    H5F__close
  *
- * Purpose:	Closes a file or causes the close operation to be pended.
- *		This function is called two ways: from the API it gets called
- *		by H5Fclose->H5I_dec_ref->H5F_close when H5I_dec_ref()
- *		decrements the file ID reference count to zero.  The file ID
- *		is removed from the H5I_FILE group by H5I_dec_ref() just
- *		before H5F_close() is called. If there are open object
- *		headers then the close is pended by moving the file to the
- *		H5I_FILE_CLOSING ID group (the f->closing contains the ID
- *		assigned to file).
+ * Purpose:     Internal routine to close a file.
  *
- *		This function is also called directly from H5O_close() when
- *		the last object header is closed for the file and the file
- *		has a pending close.
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              closing files that can set up VOL / SWMR info
+ *              (which need a DXPL).
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success / Negative on failure
  *
- * Programmer:	Robb Matzke
- *		Tuesday, September 23, 1997
+ * Programmer:	Quincey Koziol
+ *		December 16, 2017
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_close(H5F_t *f)
+H5F__close(hid_t file_id)
 {
-    herr_t	        ret_value = SUCCEED;    /* Return value */
+    H5F_t       *f;                     /* File pointer */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Flush file if this is the last reference to this id and we have write
+     * intent, unless it will be flushed by the "shared" file being closed.
+     * This is only necessary to replicate previous behaviour, and could be
+     * disabled by an option/property to improve performance.
+     */
+    if(NULL == (f = (H5F_t *)H5I_object(file_id)))
+        HGOTO_ERROR(H5E_FILE, H5E_BADTYPE, FAIL, "invalid file identifier")
+    if((f->shared->nrefs > 1) && (H5F_INTENT(f) & H5F_ACC_RDWR)) {
+        int nref;       /* Number of references to file ID */
+
+        if((nref = H5I_get_ref(file_id, FALSE)) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get ID ref count")
+        if(nref == 1)
+            if(H5F__flush_real(f) < 0)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush cache")
+    } /* end if */
+
+    /* Decrement reference count on file ID */
+    /* (When it reaches zero the file will be closed) */
+    if(H5I_dec_app_ref(file_id) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTDEC, FAIL, "decrementing file ID failed")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5F__close() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__close_cb
+ *
+ * Purpose:    Closes a file or causes the close operation to be pended.
+ *        This function is called from the API and gets called
+ *        by H5Fclose->H5I_dec_ref->H5F__close_cb when H5I_dec_ref()
+ *        decrements the file ID reference count to zero.  The file ID
+ *        is removed from the H5I_FILE group by H5I_dec_ref() just
+ *        before H5F__close_cb() is called. If there are open object
+ *        headers then the close is pended by moving the file to the
+ *        H5I_FILE_CLOSING ID group (the f->closing contains the ID
+ *        assigned to file).
+ *
+ * Return:    Non-negative on success/Negative on failure
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__close_cb(H5F_t *f)
+{
+    herr_t ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Sanity check */
     HDassert(f);
@@ -1710,22 +2104,19 @@ H5F_close(H5F_t *f)
         HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file")
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_close() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5F__close_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_try_close
+ * Function: H5F_try_close
  *
- * Purpose:	Attempts to close a file due to one of several actions:
+ * Purpose:  Attempts to close a file due to one of several actions:
  *                      - The reference count on the file ID dropped to zero
  *                      - The last open object was closed in the file
  *                      - The file was unmounted
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		Tuesday, July 19, 2005
+ * Return:   Non-negative on success/Negative on failure
  *
  *-------------------------------------------------------------------------
  */
@@ -1734,7 +2125,7 @@ H5F_try_close(H5F_t *f, hbool_t *was_closed /*out*/)
 {
     unsigned            nopen_files = 0;        /* Number of open files in file/mount hierarchy */
     unsigned            nopen_objs = 0;         /* Number of open objects in file/mount hierarchy */
-    herr_t	        ret_value = SUCCEED;    /* Return value */
+    herr_t              ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
@@ -1765,12 +2156,12 @@ H5F_try_close(H5F_t *f, hbool_t *was_closed /*out*/)
     /*
      * Close file according to close degree:
      *
-     *  H5F_CLOSE_WEAK:	if there are still objects open, wait until
-     *			they are all closed.
-     *  H5F_CLOSE_SEMI:	if there are still objects open, return fail;
-     *			otherwise, close file.
-     *  H5F_CLOSE_STRONG:	if there are still objects open, close them
-     *			first, then close file.
+     *  H5F_CLOSE_WEAK:    if there are still objects open, wait until
+     *            they are all closed.
+     *  H5F_CLOSE_SEMI:    if there are still objects open, return fail;
+     *            otherwise, close file.
+     *  H5F_CLOSE_STRONG:    if there are still objects open, close them
+     *            first, then close file.
      */
     switch(f->shared->fc_degree) {
         case H5F_CLOSE_WEAK:
@@ -1861,14 +2252,14 @@ H5F_try_close(H5F_t *f, hbool_t *was_closed /*out*/)
             HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close parent file")
 
     /* Unmount and close each child before closing the current file. */
-    if(H5F_close_mounts(f) < 0)
+    if(H5F__close_mounts(f) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't unmount child files")
 
     /* If there is more than one reference to the shared file struct and the
      * file has an external file cache, we should see if it can be closed.  This
      * can happen if a cycle is formed with external file caches */
     if(f->shared->efc && (f->shared->nrefs > 1))
-        if(H5F_efc_try_close(f) < 0)
+        if(H5F__efc_try_close(f) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "can't attempt to close EFC")
 
     /* Delay flush until the shared file struct is closed, in H5F__dest.  If the
@@ -1880,7 +2271,7 @@ H5F_try_close(H5F_t *f, hbool_t *was_closed /*out*/)
      * shared H5F_file_t struct. If the reference count for the H5F_file_t
      * struct reaches zero then destroy it also.
      */
-    if(H5F__dest(f, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id, TRUE) < 0)
+    if(H5F__dest(f, TRUE) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "problems closing file")
 
     /* Since we closed the file, this should be set to TRUE */
@@ -1892,16 +2283,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_id
- *
- * Purpose:	Get the file ID, incrementing it, or "resurrecting" it as
- *              appropriate.
+ * Function: H5F_get_id
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Raymond Lu
- *		Oct 29, 2003
+ * Purpose:  Get the file ID, incrementing it, or "resurrecting" it as
+ *           appropriate.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -1916,8 +2303,9 @@ H5F_get_id(H5F_t *file, hbool_t app_ref)
     if(file->file_id == -1) {
         /* Get an atom for the file */
         if((file->file_id = H5I_register(H5I_FILE, file, app_ref)) < 0)
-	    HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file")
-    } else {
+            HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to atomize file")
+    }
+    else {
         /* Increment reference count on atom. */
         if(H5I_inc_ref(file->file_id, app_ref) < 0)
             HGOTO_ERROR(H5E_ATOM, H5E_CANTSET, FAIL, "incrementing file ID failed")
@@ -1931,18 +2319,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_incr_nopen_objs
- *
- * Purpose:	Increment the number of open objects for a file.
+ * Function: H5F_incr_nopen_objs
  *
- * Return:	Success:	The number of open objects, after the increment
- *
- * 		Failure:	(can't happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Mar  6 2007
+ * Purpose:  Increment the number of open objects for a file.
  *
+ * Return:   Success:    The number of open objects, after the increment
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -1958,18 +2340,12 @@ H5F_incr_nopen_objs(H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_decr_nopen_objs
- *
- * Purpose:	Decrement the number of open objects for a file.
+ * Function: H5F_decr_nopen_objs
  *
- * Return:	Success:	The number of open objects, after the decrement
- *
- * 		Failure:	(can't happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Mar  6 2007
+ * Purpose:  Decrement the number of open objects for a file.
  *
+ * Return:   Success:    The number of open objects, after the decrement
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -1985,18 +2361,14 @@ H5F_decr_nopen_objs(H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_build_actual_name
- *
- * Purpose:	Retrieve the name of a file, after following symlinks, etc.
+ * Function: H5F_build_actual_name
  *
- * Note:	Currently only working for "POSIX I/O compatible" VFDs
+ * Purpose:  Retrieve the name of a file, after following symlinks, etc.
  *
- * Return:	Success:        0
- *		Failure:	-1
- *
- * Programmer:	Quincey Koziol
- *		November 25, 2009
+ * Note:     Currently only working for "POSIX I/O compatible" VFDs
  *
+ * Return:   Success:        0
+ *           Failure:    -1
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -2111,17 +2483,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_addr_encode_len
- *
- * Purpose:	Encodes an address into the buffer pointed to by *PP and
- *		then increments the pointer to the first byte after the
- *		address.  An undefined value is stored as all 1's.
+ * Function: H5F_addr_encode_len
  *
- * Return:	void
- *
- * Programmer:	Robb Matzke
- *		Friday, November  7, 1997
+ * Purpose:  Encodes an address into the buffer pointed to by *PP and
+ *           then increments the pointer to the first byte after the
+ *           address.  An undefined value is stored as all 1's.
  *
+ * Return:   void
  *-------------------------------------------------------------------------
  */
 void
@@ -2136,15 +2504,15 @@ H5F_addr_encode_len(size_t addr_len, uint8_t **pp/*in,out*/, haddr_t addr)
     HDassert(pp && *pp);
 
     if(H5F_addr_defined(addr)) {
-	for(u = 0; u < addr_len; u++) {
-	    *(*pp)++ = (uint8_t)(addr & 0xff);
-	    addr >>= 8;
-	} /* end for */
-	HDassert("overflow" && 0 == addr);
+        for(u = 0; u < addr_len; u++) {
+            *(*pp)++ = (uint8_t)(addr & 0xff);
+            addr >>= 8;
+        } /* end for */
+        HDassert("overflow" && 0 == addr);
     } /* end if */
     else {
-	for(u = 0; u < addr_len; u++)
-	    *(*pp)++ = 0xff;
+        for(u = 0; u < addr_len; u++)
+            *(*pp)++ = 0xff;
     } /* end else */
 
     FUNC_LEAVE_NOAPI_VOID
@@ -2152,17 +2520,13 @@ H5F_addr_encode_len(size_t addr_len, uint8_t **pp/*in,out*/, haddr_t addr)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_addr_encode
- *
- * Purpose:	Encodes an address into the buffer pointed to by *PP and
- *		then increments the pointer to the first byte after the
- *		address.  An undefined value is stored as all 1's.
- *
- * Return:	void
+ * Function: H5F_addr_encode
  *
- * Programmer:	Robb Matzke
- *		Friday, November  7, 1997
+ * Purpose:  Encodes an address into the buffer pointed to by *PP and
+ *           then increments the pointer to the first byte after the
+ *           address.  An undefined value is stored as all 1's.
  *
+ * Return:   void
  *-------------------------------------------------------------------------
  */
 void
@@ -2180,27 +2544,23 @@ H5F_addr_encode(const H5F_t *f, uint8_t **pp/*in,out*/, haddr_t addr)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_addr_decode_len
+ * Function: H5F_addr_decode_len
  *
- * Purpose:	Decodes an address from the buffer pointed to by *PP and
- *		updates the pointer to point to the next byte after the
- *		address.
+ * Purpose:  Decodes an address from the buffer pointed to by *PP and
+ *           updates the pointer to point to the next byte after the
+ *           address.
  *
- *		If the value read is all 1's then the address is returned
- *		with an undefined value.
- *
- * Return:	void
- *
- * Programmer:	Robb Matzke
- *		Friday, November  7, 1997
+ *           If the value read is all 1's then the address is returned
+ *           with an undefined value.
  *
+ * Return:   void
  *-------------------------------------------------------------------------
  */
 void
 H5F_addr_decode_len(size_t addr_len, const uint8_t **pp/*in,out*/, haddr_t *addr_p/*out*/)
 {
-    hbool_t	    all_zero = TRUE;    /* True if address was all zeroes */
-    unsigned	    u;          /* Local index variable */
+    hbool_t        all_zero = TRUE;    /* True if address was all zeroes */
+    unsigned       u;                  /* Local index variable */
 
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
@@ -2214,27 +2574,27 @@ H5F_addr_decode_len(size_t addr_len, const uint8_t **pp/*in,out*/, haddr_t *addr
 
     /* Decode bytes from address */
     for(u = 0; u < addr_len; u++) {
-        uint8_t	    c;          /* Local decoded byte */
+        uint8_t        c;          /* Local decoded byte */
 
         /* Get decoded byte (and advance pointer) */
-	c = *(*pp)++;
+        c = *(*pp)++;
 
         /* Check for non-undefined address byte value */
-	if(c != 0xff)
+        if(c != 0xff)
             all_zero = FALSE;
 
-	if(u < sizeof(*addr_p)) {
-            haddr_t	    tmp = c;    /* Local copy of address, for casting */
+        if(u < sizeof(*addr_p)) {
+            haddr_t        tmp = c;    /* Local copy of address, for casting */
 
             /* Shift decoded byte to correct position */
-	    tmp <<= (u * 8);	/*use tmp to get casting right */
+            tmp <<= (u * 8);    /*use tmp to get casting right */
 
             /* Merge into already decoded bytes */
-	    *addr_p |= tmp;
-	} /* end if */
+            *addr_p |= tmp;
+        } /* end if */
         else
             if(!all_zero)
-                HDassert(0 == **pp);	/*overflow */
+                HDassert(0 == **pp);    /*overflow */
     } /* end for */
 
     /* If 'all_zero' is still TRUE, the address was entirely composed of '0xff'
@@ -2248,20 +2608,16 @@ H5F_addr_decode_len(size_t addr_len, const uint8_t **pp/*in,out*/, haddr_t *addr
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_addr_decode
- *
- * Purpose:	Decodes an address from the buffer pointed to by *PP and
- *		updates the pointer to point to the next byte after the
- *		address.
+ * Function: H5F_addr_decode
  *
- *		If the value read is all 1's then the address is returned
- *		with an undefined value.
+ * Purpose:  Decodes an address from the buffer pointed to by *PP and
+ *           updates the pointer to point to the next byte after the
+ *           address.
  *
- * Return:	void
- *
- * Programmer:	Robb Matzke
- *		Friday, November  7, 1997
+ *           If the value read is all 1's then the address is returned
+ *           with an undefined value.
  *
+ * Return:   void
  *-------------------------------------------------------------------------
  */
 void
@@ -2285,10 +2641,6 @@ H5F_addr_decode(const H5F_t *f, const uint8_t **pp/*in,out*/, haddr_t *addr_p/*o
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Quincey Koziol
- *              7/19/11
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2315,10 +2667,6 @@ H5F_set_grp_btree_shared(H5F_t *f, H5UC_t *rc)
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Quincey Koziol
- *              7/20/11
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2344,10 +2692,6 @@ H5F_set_sohm_addr(H5F_t *f, haddr_t addr)
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Quincey Koziol
- *              7/20/11
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2373,10 +2717,6 @@ H5F_set_sohm_vers(H5F_t *f, unsigned vers)
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Quincey Koziol
- *              7/20/11
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2402,10 +2742,6 @@ H5F_set_sohm_nindexes(H5F_t *f, unsigned nindexes)
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Quincey Koziol
- *              7/20/11
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2425,27 +2761,117 @@ H5F_set_store_msg_crt_idx(H5F_t *f, hbool_t flag)
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_get_file_image
+ * Function:    H5F_set_libver_bounds()
+ *
+ * Purpose:     Set the file's low and high bound to the input parameters
+ *              'low' and 'high' respectively.
+ *              This is done only if the existing setting is different
+ *              from the inputs.
+ *
+ * Return:      SUCCEED on success, and FAIL on failure.
+ *
+ * Programmer:  Vailin Choi; December 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__set_libver_bounds(H5F_t *f, H5F_libver_t low, H5F_libver_t high)
+{
+    herr_t     ret_value = SUCCEED;     /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(f->shared);
+
+    /* Set the bounds only if the existing setting is different from the inputs */
+    if(f->shared->low_bound != low || f->shared->high_bound != high) {
+        /* Call the flush routine, for this file */
+        /* Note: This is done in case the binary format for representing a
+         *      metadata entry class changes when the file format low / high
+         *      bounds are changed and an unwritten entry of that class is
+         *      sitting in the metadata cache.
+         *      
+         *      If that happens, it's possible that the entry's size could
+         *      become larger, potentially corrupting the file (if the larger
+         *      entry is fully written, overwriting data outside its allocated
+         *      space), or corrupting the entry (if the entry is truncated to
+         *      fit into the allocated space).
+         *      
+         *      Although I'm not aware of any metadata with this behavior
+         *      currently, it would be very difficult to guard against and / or
+         *      detect, but if we flush everything here, the format version
+         *      for metadata entries in the cache will be finalized and these
+         *      sorts of problems can be avoided.
+         *      
+         *      QAK - April, 2018
+         */
+        if(H5F__flush_real(f) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information")
+
+        /* Set the new bounds */
+        f->shared->low_bound = low;
+        f->shared->high_bound = high;
+    } /* end if */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* H5F_set_libver_bounds() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__get_freespace
+ *
+ * Purpose:     Private version of H5Fget_freespace
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:      Success:        SUCCEED
+ *              Failure:        FAIL
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__get_freespace(H5F_t *f, hsize_t *tot_space)
+{
+    herr_t     ret_value = SUCCEED;     /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(f->shared);
+
+    /* Go get the actual amount of free space in the file */
+    if(H5MF_get_freespace(f, tot_space, NULL) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to check free space for file")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5F__get_freespace() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__get_file_image
  *
  * Purpose:     Private version of H5Fget_file_image
  *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
  * Return:      Success:        Bytes copied / number of bytes needed.
  *              Failure:        negative value
- *
- * Programmer:  John Mainzer
- *              11/15/11
- *
  *-------------------------------------------------------------------------
  */
 ssize_t
-H5F_get_file_image(H5F_t *file, void *buf_ptr, size_t buf_len, hid_t meta_dxpl_id,
-    hid_t raw_dxpl_id)
+H5F__get_file_image(H5F_t *file, void *buf_ptr, size_t buf_len)
 {
     H5FD_t     *fd_ptr;                 /* file driver */
     haddr_t     eoa;                    /* End of file address */
     ssize_t     ret_value = -1;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Check args */
     if(!file || !file->shared || !file->shared->lf)
@@ -2475,20 +2901,20 @@ H5F_get_file_image(H5F_t *file, void *buf_ptr, size_t buf_len, hid_t meta_dxpl_i
     if(HDstrcmp(fd_ptr->cls->name, "multi") == 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Not supported for multi file driver.")
 
-    /* While the family file driver is conceptually fully compatible 
+    /* While the family file driver is conceptually fully compatible
      * with the get file image operation, it sets a file driver message
      * in the super block that prevents the image being opened with any
      * driver other than the family file driver.  Needless to say, this
      * rather defeats the purpose of the get file image operation.
      *
-     * While this problem is quire solvable, the required time and 
+     * While this problem is quire solvable, the required time and
      * resources are lacking at present.  Hence, for now, we don't
-     * allow the get file image operation to be perfomed on files 
+     * allow the get file image operation to be perfomed on files
      * opened with the family file driver.
      *
-     * Observe that the following test only looks at the top level 
+     * Observe that the following test only looks at the top level
      * driver, and fails if there is some other driver sitting on to
-     * of the family file driver.  
+     * of the family file driver.
      *
      * I don't think this can happen at present, but that may change
      * in the future.
@@ -2506,8 +2932,7 @@ H5F_get_file_image(H5F_t *file, void *buf_ptr, size_t buf_len, hid_t meta_dxpl_i
 
     /* test to see if a buffer was provided -- if not, we are done */
     if(buf_ptr != NULL) {
-        H5FD_io_info_t fdio_info;       /* File driver I/O info */
-        size_t	space_needed;		/* size of file image */
+        size_t    space_needed;        /* size of file image */
         hsize_t tmp;
         size_t tmp_size;
 
@@ -2517,16 +2942,9 @@ H5F_get_file_image(H5F_t *file, void *buf_ptr, size_t buf_len, hid_t meta_dxpl_i
 
         space_needed = (size_t)eoa;
 
-        /* Set up file driver I/O info object */
-        fdio_info.file = fd_ptr;
-        if(NULL == (fdio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(meta_dxpl_id)))
-            HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get property list object")
-        if(NULL == (fdio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(raw_dxpl_id)))
-            HGOTO_ERROR(H5E_CACHE, H5E_BADATOM, FAIL, "can't get property list object")
-
         /* read in the file image */
         /* (Note compensation for base address addition in internal routine) */
-        if(H5FD_read(&fdio_info, H5FD_MEM_DEFAULT, 0, space_needed, buf_ptr) < 0)
+        if(H5FD_read(fd_ptr, H5FD_MEM_DEFAULT, 0, space_needed, buf_ptr) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_READERROR, FAIL, "file image read request failed")
 
         /* Offset to "status_flags" in the superblock */
@@ -2538,34 +2956,81 @@ H5F_get_file_image(H5F_t *file, void *buf_ptr, size_t buf_len, hid_t meta_dxpl_i
         HDmemset((uint8_t *)(buf_ptr) + tmp, 0, tmp_size);
 
     } /* end if */
-    
+
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5F_get_file_image() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5F__get_file_image() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_track_metadata_read_retries
+ * Function:    H5F__get_info
+ *
+ * Purpose:     Private version of H5Fget_info
  *
- * Purpose:     To track the # of a "retries" (log10) for a metadata item.
- *		This routine should be used only when:
- *		  "retries" > 0
- *		  f->shared->read_attempts > 1 (does not have retry when 1)
- *		  f->shared->retries_nbins > 0 (calculated based on f->shared->read_attempts)
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__get_info(H5F_t *f, H5F_info2_t *finfo)
+{
+    herr_t ret_value = SUCCEED;  /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(f->shared);
+    HDassert(finfo);
+
+    /* Reset file info struct */
+    HDmemset(finfo, 0, sizeof(*finfo));
+
+    /* Get the size of the superblock and any superblock extensions */
+    if(H5F__super_size(f, &finfo->super.super_size, &finfo->super.super_ext_size) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to retrieve superblock sizes")
+
+    /* Get the size of any persistent free space */
+    if(H5MF_get_freespace(f, &finfo->free.tot_space, &finfo->free.meta_size) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to retrieve free space information")
+
+    /* Check for SOHM info */
+    if(H5F_addr_defined(f->shared->sohm_addr))
+        if(H5SM_ih_size(f, &finfo->sohm.hdr_size, &finfo->sohm.msgs_info) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to retrieve SOHM index & heap storage info")
+
+    /* Set version # fields */
+    finfo->super.version = f->shared->sblock->super_vers;
+    finfo->sohm.version = f->shared->sohm_vers;
+    finfo->free.version = HDF5_FREESPACE_VERSION;
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5F__get_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5F_track_metadata_read_retries
  *
- * Programmer:  Vailin Choi; October 2013
+ * Purpose:  To track the # of a "retries" (log10) for a metadata item.
+ *           This routine should be used only when:
+ *           "retries" > 0
+ *           f->shared->read_attempts > 1 (does not have retry when 1)
+ *           f->shared->retries_nbins > 0 (calculated based on f->shared->read_attempts)
  *
+ * Return:   Success:        SUCCEED
+ *           Failure:        FAIL
  *-------------------------------------------------------------------------
  */
 herr_t
 H5F_track_metadata_read_retries(H5F_t *f, unsigned actype, unsigned retries)
 {
-    unsigned log_ind;			/* Index to the array of retries based on log10 of retries */
-    double tmp;                         /* Temporary value, to keep compiler quiet */
-    herr_t ret_value = SUCCEED; 	/* Return value */
+    unsigned log_ind;            /* Index to the array of retries based on log10 of retries */
+    double tmp;                  /* Temporary value, to keep compiler quiet */
+    herr_t ret_value = SUCCEED;  /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -2596,23 +3061,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_set_retries
+ * Function: H5F_set_retries
  *
- * Purpose:     To initialize data structures for read retries:
- *		--zero out "retries"
- *		--set up "retries_nbins" based on read_attempts
- *
- * Return:      Success:        SUCCEED
- *              Failure:        FAIL
- *
- * Programmer:  Vailin Choi; November 2013
+ * Purpose:  To initialize data structures for read retries:
+ *           --zero out "retries"
+ *           --set up "retries_nbins" based on read_attempts
  *
+ * Return:   Success:        SUCCEED
+ *           Failure:        FAIL
  *-------------------------------------------------------------------------
  */
 herr_t
 H5F_set_retries(H5F_t *f)
 {
-    double tmp;				/* Temporary variable */
+    double tmp;                /* Temporary variable */
 
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
@@ -2635,6 +3097,39 @@ H5F_set_retries(H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5F__get_free_sections
+ *
+ * Purpose:     Private version of H5Fget_free_sections
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:      Success:        non-negative, the total # of free space sections
+ *              Failure:        negative
+ *-------------------------------------------------------------------------
+ */
+ssize_t
+H5F__get_free_sections(H5F_t *f, H5FD_mem_t type, size_t nsects,
+    H5F_sect_info_t *sect_info)
+{
+    ssize_t     ret_value = -1;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(f->shared);
+
+    /* Go get the actual amount of free space in the file */
+    if((ret_value = H5MF_get_free_sections(f, type, nsects, sect_info)) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get free space sections for file")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5F__get_free_sections() */
+
+
+/*-------------------------------------------------------------------------
  * Function:    H5F_object_flush_cb
  *
  * Purpose:     To invoke the callback function for object flush that is set
@@ -2642,9 +3137,6 @@ H5F_set_retries(H5F_t *f)
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Vailin Choi; October 2013
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2668,15 +3160,11 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F__set_base_addr
- *
- * Purpose:	Quick and dirty routine to set the file's 'base_addr' value
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5F__set_base_addr
  *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		July 19, 2013
+ * Purpose:  Quick and dirty routine to set the file's 'base_addr' value
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2691,7 +3179,7 @@ H5F__set_base_addr(const H5F_t *f, haddr_t addr)
 
     /* Dispatch to driver */
     if(H5FD_set_base_addr(f->shared->lf, addr) < 0)
-	HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "driver set_base_addr request failed")
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "driver set_base_addr request failed")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2699,15 +3187,11 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F__set_eoa
+ * Function: H5F__set_eoa
  *
- * Purpose:	Quick and dirty routine to set the file's 'eoa' value
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		July 19, 2013
+ * Purpose:  Quick and dirty routine to set the file's 'eoa' value
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2722,7 +3206,7 @@ H5F__set_eoa(const H5F_t *f, H5F_mem_t type, haddr_t addr)
 
     /* Dispatch to driver */
     if(H5FD_set_eoa(f->shared->lf, type, addr) < 0)
-	HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "driver set_eoa request failed")
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "driver set_eoa request failed")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2730,15 +3214,11 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F__set_paged_aggr
- *
- * Purpose:	Quick and dirty routine to set the file's paged_aggr mode
+ * Function: H5F__set_paged_aggr
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		June 19, 2015
+ * Purpose:  Quick and dirty routine to set the file's paged_aggr mode
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -2760,6 +3240,44 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5F__set_paged_aggr() */
 
+
+/*-------------------------------------------------------------------------
+ * Function: H5F__get_max_eof_eoa
+ *
+ * Purpose:  Determine the maximum of (EOA, EOF) for the file
+ *
+ * Return:   Non-negative on success/Negative on failure
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__get_max_eof_eoa(const H5F_t *f, haddr_t *max_eof_eoa)
+{
+    haddr_t eof;                /* Relative address for EOF */
+    haddr_t eoa;                /* Relative address for EOA */
+    haddr_t tmp_max;
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(f->shared);
+
+    /* Get the relative EOA and EOF */
+    eoa = H5FD_get_eoa(f->shared->lf, H5FD_MEM_DEFAULT);
+    eof = H5FD_get_eof(f->shared->lf, H5FD_MEM_DEFAULT);
+
+    /* Determine the maximum */
+    tmp_max = MAX(eof, eoa);
+    if(HADDR_UNDEF == tmp_max)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "file get eof/eoa requests failed")
+
+    *max_eof_eoa = tmp_max;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5F__get_max_eof_eoa() */
+
 #ifdef H5_HAVE_PARALLEL
 
 /*-------------------------------------------------------------------------
@@ -2769,10 +3287,6 @@ done:
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
- *
- * Programmer:  Quincey Koziol
- *              2/10/16
- *
  *-------------------------------------------------------------------------
  */
 void
@@ -2792,31 +3306,381 @@ H5F_set_coll_md_read(H5F_t *f, H5P_coll_md_read_flag_t cmr)
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_set_latest_flags
+ * Function:    H5F__get_metadata_read_retry_info
+ *
+ * Purpose:     Private function to retrieve the collection of read retries
+ *              for metadata items with checksum.
  *
- * Purpose:     Set the latest_flags field with a new value.
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__get_metadata_read_retry_info(H5F_t *file, H5F_retry_info_t *info)
+{
+    unsigned     i, j;            /* Local index variable */
+    size_t       tot_size;        /* Size of each retries[i] */
+    herr_t       ret_value = SUCCEED;       /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args */
+    HDassert(file);
+    HDassert(info);
+
+    /* Copy the # of bins for "retries" array */
+    info->nbins = file->shared->retries_nbins;
+
+    /* Initialize the array of "retries" */
+    HDmemset(info->retries, 0, sizeof(info->retries));
+
+    /* Return if there are no bins -- no retries */
+    if (!info->nbins)
+        HGOTO_DONE(SUCCEED);
+
+    /* Calculate size for each retries[i] */
+    tot_size = info->nbins * sizeof(uint32_t);
+
+    /* Map and copy information to info's retries for metadata items with tracking for read retries */
+    j = 0;
+    for (i = 0; i < H5AC_NTYPES; i++) {
+        switch (i) {
+            case H5AC_OHDR_ID:
+            case H5AC_OHDR_CHK_ID:
+            case H5AC_BT2_HDR_ID:
+            case H5AC_BT2_INT_ID:
+            case H5AC_BT2_LEAF_ID:
+            case H5AC_FHEAP_HDR_ID:
+            case H5AC_FHEAP_DBLOCK_ID:
+            case H5AC_FHEAP_IBLOCK_ID:
+            case H5AC_FSPACE_HDR_ID:
+            case H5AC_FSPACE_SINFO_ID:
+            case H5AC_SOHM_TABLE_ID:
+            case H5AC_SOHM_LIST_ID:
+            case H5AC_EARRAY_HDR_ID:
+            case H5AC_EARRAY_IBLOCK_ID:
+            case H5AC_EARRAY_SBLOCK_ID:
+            case H5AC_EARRAY_DBLOCK_ID:
+            case H5AC_EARRAY_DBLK_PAGE_ID:
+            case H5AC_FARRAY_HDR_ID:
+            case H5AC_FARRAY_DBLOCK_ID:
+            case H5AC_FARRAY_DBLK_PAGE_ID:
+            case H5AC_SUPERBLOCK_ID:
+                HDassert(j < H5F_NUM_METADATA_READ_RETRY_TYPES);
+                if (file->shared->retries[i] != NULL) {
+                    /* Allocate memory for retries[i]
+                     *
+                     * This memory should be released by the user with
+                     * the H5free_memory() call.
+                     */
+                    if (NULL == (info->retries[j] = (uint32_t *)H5MM_malloc(tot_size)))
+                        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+                    /* Copy the information */
+                    HDmemcpy(info->retries[j], file->shared->retries[i], tot_size);
+                }
+
+                /* Increment location in info->retries[] array */
+                j++;
+                break;
+
+            default:
+                break;
+        }
+    }
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5F__get_metadata_read_retry_info() */
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__start_swmr_write
+ *
+ * Purpose:     Private version of H5Fstart_swmr_write
+ *
+ *              1) Refresh opened objects: part 1
+ *              2) Flush & reset accumulator
+ *              3) Mark the file in SWMR writing mode
+ *              4) Set metadata read attempts and retries info
+ *              5) Disable accumulator
+ *              6) Evict all cache entries except the superblock
+ *              7) Refresh opened objects (part 2)
+ *              8) Unlock the file
+ *
+ *              Pre-conditions:
+ *
+ *              1) The file being opened has v3 superblock
+ *              2) The file is opened with H5F_ACC_RDWR
+ *              3) The file is not already marked for SWMR writing
+ *              4) Current implementaion for opened objects:
+ *                  --only allow datasets and groups without attributes
+ *                  --disallow named datatype with/without attributes
+ *                  --disallow opened attributes attached to objects
+ *
+ * Note:        Currently, only opened groups and datasets are allowed
+ *              when enabling SWMR via H5Fstart_swmr_write().
+ *              Will later implement a different approach--
+ *              set up flush dependency/proxy even for file opened without
+ *              SWMR to resolve issues with opened objects.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5F__start_swmr_write(H5F_t *f)
+{
+    hbool_t ci_load = FALSE;        /* whether MDC ci load requested */
+    hbool_t ci_write = FALSE;       /* whether MDC CI write requested */
+    size_t grp_dset_count = 0;      /* # of open objects: groups & datasets */
+    size_t nt_attr_count = 0;       /* # of opened named datatypes  + opened attributes */
+    hid_t *obj_ids = NULL;          /* List of ids */
+    H5G_loc_t *obj_glocs = NULL;    /* Group location of the object */
+    H5O_loc_t *obj_olocs = NULL;    /* Object location */
+    H5G_name_t *obj_paths = NULL;   /* Group hierarchy path */
+    size_t u;                       /* Local index variable */
+    hbool_t setup = FALSE;          /* Boolean flag to indicate whether SWMR setting is enabled */
+    herr_t ret_value = SUCCEED;     /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(f);
+    HDassert(f->shared);
+
+    /* Should have write permission */
+    if((H5F_INTENT(f) & H5F_ACC_RDWR) == 0)
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "no write intent on file")
+
+    /* Check superblock version */
+    if(f->shared->sblock->super_vers < HDF5_SUPERBLOCK_VERSION_3)
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "file superblock version - should be at least 3")
+
+    /* Check for correct file format version */
+    if((f->shared->low_bound != H5F_LIBVER_V110) || (f->shared->high_bound != H5F_LIBVER_V110))
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "file format version does not support SWMR - needs to be 1.10 or greater")
+
+    /* Should not be marked for SWMR writing mode already */
+    if(f->shared->sblock->status_flags & H5F_SUPER_SWMR_WRITE_ACCESS)
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "file already in SWMR writing mode")
+
+    /* Check to see if cache image is enabled.  Fail if so */
+    if(H5C_cache_image_status(f, &ci_load, &ci_write) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MDC cache image status")
+    if(ci_load || ci_write )
+        HGOTO_ERROR(H5E_FILE, H5E_UNSUPPORTED, FAIL, "can't have both SWMR and MDC cache image")
+
+    /* Flush the superblock extension */
+    if(H5F_flush_tagged_metadata(f, f->shared->sblock->ext_addr) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush superblock extension")
+
+    /* Flush data buffers */
+    if(H5F__flush_real(f) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush f's cached information")
+
+    /* Get the # of opened named datatypes and attributes */
+    if(H5F_get_obj_count(f, H5F_OBJ_DATATYPE|H5F_OBJ_ATTR, FALSE, &nt_attr_count) < 0)
+        HGOTO_ERROR(H5E_INTERNAL, H5E_BADITER, FAIL, "H5F_get_obj_count failed")
+    if(nt_attr_count)
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "named datatypes and/or attributes opened in the file")
+
+    /* Get the # of opened datasets and groups */
+    if(H5F_get_obj_count(f, H5F_OBJ_GROUP|H5F_OBJ_DATASET, FALSE, &grp_dset_count) < 0)
+        HGOTO_ERROR(H5E_INTERNAL, H5E_BADITER, FAIL, "H5F_get_obj_count failed")
+
+    if(grp_dset_count) {
+        /* Allocate space for group and object locations */
+        if((obj_ids = (hid_t *) H5MM_malloc(grp_dset_count * sizeof(hid_t))) == NULL)
+            HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for hid_t")
+        if((obj_glocs = (H5G_loc_t *) H5MM_malloc(grp_dset_count * sizeof(H5G_loc_t))) == NULL)
+            HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for H5G_loc_t")
+        if((obj_olocs = (H5O_loc_t *) H5MM_malloc(grp_dset_count * sizeof(H5O_loc_t))) == NULL)
+            HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for H5O_loc_t")
+        if((obj_paths = (H5G_name_t *) H5MM_malloc(grp_dset_count * sizeof(H5G_name_t))) == NULL)
+            HGOTO_ERROR(H5E_FILE, H5E_NOSPACE, FAIL, "can't allocate buffer for H5G_name_t")
+
+        /* Get the list of opened object ids (groups & datasets) */
+        if(H5F_get_obj_ids(f, H5F_OBJ_GROUP|H5F_OBJ_DATASET, grp_dset_count, obj_ids, FALSE, &grp_dset_count) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "H5F_get_obj_ids failed")
+
+        /* Refresh opened objects (groups, datasets) in the file */
+        for(u = 0; u < grp_dset_count; u++) {
+            H5O_loc_t *oloc;            /* object location */
+            H5G_loc_t tmp_loc;
+
+            /* Set up the id's group location */
+            obj_glocs[u].oloc = &obj_olocs[u];
+            obj_glocs[u].path = &obj_paths[u];
+            H5G_loc_reset(&obj_glocs[u]);
+
+            /* get the id's object location */
+            if((oloc = H5O_get_loc(obj_ids[u])) == NULL)
+                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an object")
+
+            /* Make deep local copy of object's location information */
+            H5G_loc(obj_ids[u], &tmp_loc);
+            H5G_loc_copy(&obj_glocs[u], &tmp_loc, H5_COPY_DEEP);
+
+            /* Close the object */
+            if(H5I_dec_ref(obj_ids[u]) < 0)
+                HGOTO_ERROR(H5E_ATOM, H5E_CANTCLOSEOBJ, FAIL, "decrementing object ID failed")
+        } /* end for */
+    } /* end if */
+
+    /* Flush and reset the accumulator */
+    if(H5F__accum_reset(f, TRUE) < 0)
+        HGOTO_ERROR(H5E_IO, H5E_CANTRESET, FAIL, "can't reset accumulator")
+
+    /* Turn on SWMR write in shared file open flags */
+    f->shared->flags |= H5F_ACC_SWMR_WRITE;
+
+    /* Mark the file in SWMR writing mode */
+    f->shared->sblock->status_flags |= H5F_SUPER_SWMR_WRITE_ACCESS;
+
+    /* Set up metadata read attempts */
+    f->shared->read_attempts = H5F_SWMR_METADATA_READ_ATTEMPTS;
+
+    /* Initialize "retries" and "retries_nbins" */
+    if(H5F_set_retries(f) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "can't set retries and retries_nbins")
+
+    /* Turn off usage of accumulator */
+    f->shared->feature_flags &= ~(unsigned)H5FD_FEAT_ACCUMULATE_METADATA;
+    if(H5FD_set_feature_flags(f->shared->lf, f->shared->feature_flags) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set feature_flags in VFD")
+
+    setup = TRUE;
+
+    /* Mark superblock as dirty */
+    if(H5F_super_dirty(f) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
+
+    /* Flush the superblock */
+    if(H5F_flush_tagged_metadata(f, H5AC__SUPERBLOCK_TAG) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush superblock")
+
+    /* Evict all flushed entries in the cache except the pinned superblock */
+    if(H5F__evict_cache_entries(f) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to evict file's cached information")
+
+    /* Refresh (reopen) the objects (groups & datasets) in the file */
+    for(u = 0; u < grp_dset_count; u++)
+        if(H5O_refresh_metadata_reopen(obj_ids[u], &obj_glocs[u], TRUE) < 0)
+            HGOTO_ERROR(H5E_ATOM, H5E_CLOSEERROR, FAIL, "can't refresh-close object")
+
+    /* Unlock the file */
+    if(H5FD_unlock(f->shared->lf) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTOPENFILE, FAIL, "unable to unlock the file")
+
+done:
+    if(ret_value < 0 && setup) {
+        HDassert(f);
+
+        /* Re-enable accumulator */
+        f->shared->feature_flags |= (unsigned)H5FD_FEAT_ACCUMULATE_METADATA;
+        if(H5FD_set_feature_flags(f->shared->lf, f->shared->feature_flags) < 0)
+            HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set feature_flags in VFD")
+
+        /* Reset the # of read attempts */
+        f->shared->read_attempts = H5F_METADATA_READ_ATTEMPTS;
+        if(H5F_set_retries(f) < 0)
+            HDONE_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "can't set retries and retries_nbins")
+
+        /* Un-set H5F_ACC_SWMR_WRITE in shared open flags */
+        f->shared->flags &= ~H5F_ACC_SWMR_WRITE;
+
+        /* Unmark the f: not in SWMR writing mode */
+        f->shared->sblock->status_flags &= (uint8_t)(~H5F_SUPER_SWMR_WRITE_ACCESS);
+
+        /* Mark superblock as dirty */
+        if(H5F_super_dirty(f) < 0)
+            HDONE_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
+
+        /* Flush the superblock */
+        if(H5F_flush_tagged_metadata(f, H5AC__SUPERBLOCK_TAG) < 0)
+            HDONE_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush superblock")
+    } /* end if */
+
+    /* Free memory */
+    if(obj_ids)
+        H5MM_xfree(obj_ids);
+    if(obj_glocs)
+        H5MM_xfree(obj_glocs);
+    if(obj_olocs)
+        H5MM_xfree(obj_olocs);
+    if(obj_paths)
+        H5MM_xfree(obj_paths);
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5F__start_swmr_write() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F__format_convert
+ *
+ * Purpose:     Private version of H5Fformat_convert
  *
- * Programmer:  Quincey Koziol
- *              4/26/16
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
  *
+ * Return:      Success:        SUCCEED
+ *              Failure:        FAIL
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_set_latest_flags(H5F_t *f, unsigned flags)
+H5F__format_convert(H5F_t *f)
 {
-    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    hbool_t mark_dirty = FALSE;		/* Whether to mark the file's superblock dirty */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Sanity check */
     HDassert(f);
     HDassert(f->shared);
-    HDassert(0 == ((~flags) & H5F_LATEST_ALL_FLAGS));
 
-    f->shared->latest_flags = flags;
+    /* Check if the superblock should be downgraded */
+    if(f->shared->sblock->super_vers > HDF5_SUPERBLOCK_VERSION_V18_LATEST) {
+	f->shared->sblock->super_vers = HDF5_SUPERBLOCK_VERSION_V18_LATEST;
+	mark_dirty = TRUE;
+    } /* end if */
 
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* H5F_set_latest_flags() */
+    /* Check for persistent freespace manager, which needs to be downgraded */
+    if(!(f->shared->fs_strategy == H5F_FILE_SPACE_STRATEGY_DEF &&
+	    f->shared->fs_persist == H5F_FREE_SPACE_PERSIST_DEF &&
+	    f->shared->fs_threshold == H5F_FREE_SPACE_THRESHOLD_DEF &&
+	    f->shared->fs_page_size == H5F_FILE_SPACE_PAGE_SIZE_DEF)) {
+	/* Check to remove free-space manager info message from superblock extension */
+	if(H5F_addr_defined(f->shared->sblock->ext_addr))
+	    if(H5F__super_ext_remove_msg(f, H5O_FSINFO_ID) < 0)
+		HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "error in removing message from superblock extension")
+
+	/* Close freespace manager */
+	if(H5MF_try_close(f) < 0)
+	    HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to free free-space address")
+
+	/* Set non-persistent freespace manager */
+	f->shared->fs_strategy = H5F_FILE_SPACE_STRATEGY_DEF;
+	f->shared->fs_persist = H5F_FREE_SPACE_PERSIST_DEF;
+	f->shared->fs_threshold = H5F_FREE_SPACE_THRESHOLD_DEF;
+	f->shared->fs_page_size = H5F_FILE_SPACE_PAGE_SIZE_DEF;
+
+	/* Indicate that the superblock should be marked dirty */
+	mark_dirty = TRUE;
+    } /* end if */
+
+    /* Check if we should mark the superblock dirty */
+    if(mark_dirty)
+	/* Mark superblock as dirty */
+	if(H5F_super_dirty(f) < 0)
+	    HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5F__format_convert() */
 
diff --git a/src/H5Fio.c b/src/H5Fio.c
index 6d23995..830b7ee 100644
--- a/src/H5Fio.c
+++ b/src/H5Fio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -94,15 +92,15 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_block_read(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
-    hid_t dxpl_id, void *buf/*out*/)
+H5F_block_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
+    void *buf/*out*/)
 {
-    H5F_io_info2_t fio_info;            /* I/O info for operation */
     H5FD_mem_t  map_type;               /* Mapped memory type */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
+    /* Sanity checks */
     HDassert(f);
     HDassert(f->shared);
     HDassert(buf);
@@ -115,23 +113,8 @@ H5F_block_read(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
     /* Treat global heap as raw data */
     map_type = (type == H5FD_MEM_GHEAP) ? H5FD_MEM_DRAW : type;
 
-    /* Set up the I/O info object */
-    fio_info.f = f;
-    if(H5FD_MEM_DRAW == type) {
-        if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(H5AC_ind_read_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end if */
-    else {
-        if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end else */
-
     /* Pass through page buffer layer */
-    if(H5PB_read(&fio_info, map_type, addr, size, buf) < 0)
+    if(H5PB_read(f, map_type, addr, size, buf) < 0)
         HGOTO_ERROR(H5E_IO, H5E_READERROR, FAIL, "read through page buffer failed")
 
 done:
@@ -155,15 +138,15 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_block_write(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
-    hid_t dxpl_id, const void *buf)
+H5F_block_write(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
+    const void *buf)
 {
-    H5F_io_info2_t fio_info;            /* I/O info for operation */
     H5FD_mem_t  map_type;               /* Mapped memory type */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
+    /* Sanity checks */
     HDassert(f);
     HDassert(f->shared);
     HDassert(H5F_INTENT(f) & H5F_ACC_RDWR);
@@ -177,23 +160,8 @@ H5F_block_write(const H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
     /* Treat global heap as raw data */
     map_type = (type == H5FD_MEM_GHEAP) ? H5FD_MEM_DRAW : type;
 
-    /* Set up the I/O info object */
-    fio_info.f = f;
-    if(H5FD_MEM_DRAW == type) {
-        if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(H5AC_ind_read_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end if */
-    else {
-        if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end else */
-
     /* Pass through page buffer layer */
-    if(H5PB_write(&fio_info, map_type, addr, size, buf) < 0)
+    if(H5PB_write(f, map_type, addr, size, buf) < 0)
         HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "write through page buffer failed")
 
 done:
@@ -215,30 +183,22 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_flush_tagged_metadata(H5F_t * f, haddr_t tag, hid_t dxpl_id)
+H5F_flush_tagged_metadata(H5F_t *f, haddr_t tag)
 {
-    H5F_io_info2_t fio_info;             /* I/O info for operation */
     herr_t ret_value = SUCCEED;
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Use tag to search for and flush associated metadata */
-    if(H5AC_flush_tagged_metadata(f, tag, dxpl_id)<0)
+    if(H5AC_flush_tagged_metadata(f, tag) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush tagged metadata")
 
-    /* Set up I/O info for operation */
-    fio_info.f = f;
-    if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-
     /* Flush and reset the accumulator */
-    if(H5F__accum_reset(&fio_info, TRUE) < 0)
+    if(H5F__accum_reset(f, TRUE) < 0)
         HGOTO_ERROR(H5E_IO, H5E_CANTRESET, FAIL, "can't reset accumulator")
 
     /* Flush file buffers to disk. */
-    if(H5FD_flush(f->shared->lf, dxpl_id, FALSE) < 0)
+    if(H5FD_flush(f->shared->lf, FALSE) < 0)
         HGOTO_ERROR(H5E_IO, H5E_WRITEERROR, FAIL, "low level flush failed")
 
 done:
@@ -259,14 +219,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_evict_tagged_metadata(H5F_t * f, haddr_t tag, hid_t dxpl_id)
+H5F_evict_tagged_metadata(H5F_t *f, haddr_t tag)
 {
     herr_t ret_value = SUCCEED;
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Evict the object's metadata */
-    if(H5AC_evict_tagged_metadata(f, tag, TRUE, dxpl_id) < 0)
+    if(H5AC_evict_tagged_metadata(f, tag, TRUE) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTEXPUNGE, FAIL, "unable to evict tagged metadata")
 
 done:
@@ -287,7 +247,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__evict_cache_entries(H5F_t *f, hid_t dxpl_id)
+H5F__evict_cache_entries(H5F_t *f)
 {
     herr_t ret_value = SUCCEED;
 
@@ -297,7 +257,7 @@ H5F__evict_cache_entries(H5F_t *f, hid_t dxpl_id)
     HDassert(f->shared);
 
     /* Evict all except pinned entries in the cache */
-    if(H5AC_evict(f, dxpl_id) < 0)
+    if(H5AC_evict(f) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTEXPUNGE, FAIL, "unable to evict all except pinned entries")
 
 #ifndef NDEBUG
diff --git a/src/H5Fmodule.h b/src/H5Fmodule.h
index 4bb2506..0481512 100644
--- a/src/H5Fmodule.h
+++ b/src/H5Fmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Fmount.c b/src/H5Fmount.c
index 859b9d6..e3a92fd 100644
--- a/src/H5Fmount.c
+++ b/src/H5Fmount.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Fmodule.h"          /* This source code file is part of the H5F module */
@@ -19,6 +17,7 @@
 /* Packages needed by this file... */
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACprivate.h"        /* Metadata cache                       */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"             /* File access				*/
 #include "H5Gprivate.h"		/* Groups				*/
@@ -27,14 +26,14 @@
 #include "H5MMprivate.h"	/* Memory management			*/
 
 /* PRIVATE PROTOTYPES */
-static herr_t H5F_mount(H5G_loc_t *loc, const char *name, H5F_t *child,
-    hid_t plist_id, hid_t dxpl_id);
-static herr_t H5F_unmount(H5G_loc_t *loc, const char *name, hid_t dxpl_id);
+static herr_t H5F__mount(H5G_loc_t *loc, const char *name, H5F_t *child,
+    hid_t plist_id);
+static herr_t H5F__unmount(H5G_loc_t *loc, const char *name);
 static void H5F_mount_count_ids_recurse(H5F_t *f, unsigned *nopen_files, unsigned *nopen_objs);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_close_mounts
+ * Function:	H5F__close_mounts
  *
  * Purpose:	Close all mounts for a given file
  *
@@ -46,7 +45,7 @@ static void H5F_mount_count_ids_recurse(H5F_t *f, unsigned *nopen_files, unsigne
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_close_mounts(H5F_t *f)
+H5F__close_mounts(H5F_t *f)
 {
     unsigned u;                 /* Local index */
     herr_t ret_value=SUCCEED;   /* Return value */
@@ -66,7 +65,7 @@ H5F_close_mounts(H5F_t *f)
 
             /* Close the internal group maintaining the mount point */
             if(H5G_close(f->shared->mtab.child[u].group) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEOBJ, FAIL, "can't close child group")
+                HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEOBJ, FAIL, "can't close child group")
 
             /* Close the child file */
             if(H5F_try_close(f->shared->mtab.child[u].file, NULL) < 0)
@@ -84,11 +83,11 @@ H5F_close_mounts(H5F_t *f)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_close_mounts() */
+} /* end H5F__close_mounts() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_mount
+ * Function:	H5F__mount
  *
  * Purpose:	Mount file CHILD onto the group specified by LOC and NAME,
  *		using mount properties in PLIST.  CHILD must not already be
@@ -102,8 +101,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F_mount(H5G_loc_t *loc, const char *name, H5F_t *child,
-	  hid_t H5_ATTR_UNUSED plist_id, hid_t dxpl_id)
+H5F__mount(H5G_loc_t *loc, const char *name, H5F_t *child, hid_t H5_ATTR_UNUSED plist_id)
 {
     H5G_t	*mount_point = NULL;	/*mount point group		*/
     H5F_t	*ancestor = NULL;	/*ancestor files		*/
@@ -116,7 +114,7 @@ H5F_mount(H5G_loc_t *loc, const char *name, H5F_t *child,
     H5G_loc_t   root_loc;               /* Group location of root of file to mount */
     herr_t	ret_value = SUCCEED;	/*return value			*/
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC_VOL
 
     HDassert(loc);
     HDassert(name && *name);
@@ -136,7 +134,7 @@ H5F_mount(H5G_loc_t *loc, const char *name, H5F_t *child,
      */
     if(child->parent)
         HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "file is already mounted")
-    if(H5G_loc_find(loc, name, &mp_loc/*out*/, H5P_DEFAULT, dxpl_id) < 0)
+    if(H5G_loc_find(loc, name, &mp_loc/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
     /* If the mount location is holding its file open, that file will close
      * and remove the mount as soon as we exit this function.  Prevent the
@@ -146,7 +144,7 @@ H5F_mount(H5G_loc_t *loc, const char *name, H5F_t *child,
         HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "mount path cannot contain links to external files")
 
     /* Open the mount point group */
-    if(NULL == (mount_point = H5G_open(&mp_loc, dxpl_id)))
+    if(NULL == (mount_point = H5G_open(&mp_loc)))
         HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "mount point not found")
 
     /* Check if the proposed mount point group is already a mount point */
@@ -229,8 +227,7 @@ H5F_mount(H5G_loc_t *loc, const char *name, H5F_t *child,
     /* Search the open IDs and replace names for mount operation */
     /* We pass H5G_UNKNOWN as object type; search all IDs */
     if(H5G_name_replace(NULL, H5G_NAME_MOUNT, mp_loc.oloc->file,
-            mp_loc.path->full_path_r, root_loc.oloc->file, root_loc.path->full_path_r,
-            dxpl_id) < 0)
+            mp_loc.path->full_path_r, root_loc.oloc->file, root_loc.path->full_path_r) < 0)
 	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "unable to replace name")
 
 done:
@@ -245,12 +242,12 @@ done:
         } /* end else */
     } /* end if */
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_mount() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5F__mount() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_unmount
+ * Function:	H5F__unmount
  *
  * Purpose:	Unmount the child which is mounted at the group specified by
  *		LOC and NAME or fail if nothing is mounted there.  Neither
@@ -268,7 +265,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F_unmount(H5G_loc_t *loc, const char *name, hid_t dxpl_id)
+H5F__unmount(H5G_loc_t *loc, const char *name)
 {
     H5G_t	*child_group = NULL;	/* Child's group in parent mtab	*/
     H5F_t	*child = NULL;		/*mounted file			*/
@@ -282,7 +279,7 @@ H5F_unmount(H5G_loc_t *loc, const char *name, hid_t dxpl_id)
     int         child_idx;              /* Index of child in parent's mtab */
     herr_t	ret_value = SUCCEED;	/*return value			*/
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC_VOL
 
     HDassert(loc);
     HDassert(name && *name);
@@ -297,7 +294,7 @@ H5F_unmount(H5G_loc_t *loc, const char *name, hid_t dxpl_id)
      * If we get the root group and the file has a parent in the mount tree,
      * then we must have found the mount point.
      */
-    if(H5G_loc_find(loc, name, &mp_loc/*out*/, H5P_DEFAULT, dxpl_id) < 0)
+    if(H5G_loc_find(loc, name, &mp_loc/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
     mp_loc_setup = TRUE;
     child = mp_loc.oloc->file;
@@ -368,8 +365,7 @@ H5F_unmount(H5G_loc_t *loc, const char *name, hid_t dxpl_id)
 
     /* Search the open IDs replace names to reflect unmount operation */
     if(H5G_name_replace(NULL, H5G_NAME_UNMOUNT, mp_loc.oloc->file,
-            mp_loc.path->full_path_r, root_loc.oloc->file, root_loc.path->full_path_r,
-            dxpl_id) < 0)
+            mp_loc.path->full_path_r, root_loc.oloc->file, root_loc.path->full_path_r) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to replace name")
 
     /* Eliminate the mount point from the table */
@@ -394,8 +390,8 @@ done:
     if(mp_loc_setup)
         H5G_loc_free(&mp_loc);
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_unmount() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5F__unmount() */
 
 
 /*-------------------------------------------------------------------------
@@ -465,8 +461,12 @@ H5Fmount(hid_t loc_id, const char *name, hid_t child_id, hid_t plist_id)
         if(TRUE != H5P_isa_class(plist_id, H5P_FILE_MOUNT))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not property list")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Do the mount */
-    if(H5F_mount(&loc, name, child, plist_id, H5AC_ind_read_dxpl_id) < 0)
+    if(H5F__mount(&loc, name, child, plist_id) < 0)
 	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "unable to mount file")
 
 done:
@@ -508,8 +508,12 @@ H5Funmount(hid_t loc_id, const char *name)
     if(!name || !*name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Unmount */
-    if (H5F_unmount(&loc, name, H5AC_ind_read_dxpl_id) < 0)
+    if(H5F__unmount(&loc, name) < 0)
 	HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "unable to unmount file")
 
 done:
@@ -614,7 +618,7 @@ H5F_mount_count_ids(H5F_t *f, unsigned *nopen_files, unsigned *nopen_objs)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F_flush_mounts_recurse(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id)
+H5F_flush_mounts_recurse(H5F_t *f)
 {
     unsigned	nerrors = 0;            /* Errors from recursive flushes */
     unsigned    u;                      /* Index variable */
@@ -627,11 +631,11 @@ H5F_flush_mounts_recurse(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id)
 
     /* Flush all child files, not stopping for errors */
     for(u = 0; u < f->shared->mtab.nmounts; u++)
-        if(H5F_flush_mounts_recurse(f->shared->mtab.child[u].file, meta_dxpl_id, raw_dxpl_id) < 0)
+        if(H5F_flush_mounts_recurse(f->shared->mtab.child[u].file) < 0)
             nerrors++;
 
     /* Call the "real" flush routine, for this file */
-    if(H5F__flush(f, meta_dxpl_id, raw_dxpl_id, FALSE) < 0)
+    if(H5F__flush_real(f) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush file's cached information")
 
     /* Check flush errors for children - errors are already on the stack */
@@ -656,7 +660,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_flush_mounts(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id)
+H5F_flush_mounts(H5F_t *f)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -670,7 +674,7 @@ H5F_flush_mounts(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id)
         f = f->parent;
 
     /* Flush the mounted file hierarchy */
-    if(H5F_flush_mounts_recurse(f, meta_dxpl_id, raw_dxpl_id) < 0)
+    if(H5F_flush_mounts_recurse(f) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush mounted file hierarchy")
 
 done:
diff --git a/src/H5Fmpi.c b/src/H5Fmpi.c
index 60593a8..f854d3b 100644
--- a/src/H5Fmpi.c
+++ b/src/H5Fmpi.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -312,50 +310,53 @@ H5F_mpi_retrieve_comm(hid_t loc_id, hid_t acspl_id, MPI_Comm *mpi_comm)
 
     FUNC_ENTER_NOAPI(FAIL)
 
+    /* Sanity check */
     HDassert(mpi_comm);
+
+    /* Set value to return to invalid MPI comm */
     *mpi_comm = MPI_COMM_NULL;
 
     /* if the loc_id is valid, then get the comm from the file
        attached to the loc_id */
     if(H5I_INVALID_HID != loc_id) {
         H5G_loc_t loc;
-        H5F_t *f = NULL;
+        H5F_t *f;
 
-        /* retrieve the file structure */
+        /* Retrieve the file structure */
         if(H5G_loc(loc_id, &loc) < 0)
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+            HGOTO_ERROR(H5E_FILE, H5E_BADTYPE, FAIL, "not a location")
         f = loc.oloc->file;
         HDassert(f);
 
-        /* check if MPIO driver is used */
+        /* Check if MPIO driver is used */
         if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
             /* retrieve the file communicator */
             if(MPI_COMM_NULL == (*mpi_comm = H5F_mpi_get_comm(f)))
-                HGOTO_ERROR(H5E_VFL, H5E_CANTGET, FAIL, "can't get MPI communicator")
-        }
-    }
-    /* otherwise, this if from H5Fopen or H5Fcreate and has to be collective */
+                HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MPI communicator")
+        } /* end if */
+    } /* end if */
+    /* otherwise, this is from H5Fopen or H5Fcreate and has to be collective */
     else {
         H5P_genplist_t *plist;      /* Property list pointer */
 
-        HDassert(H5P_isa_class(acspl_id, H5P_FILE_ACCESS));
-
         if(NULL == (plist = H5P_object_verify(acspl_id, H5P_FILE_ACCESS)))
-            HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a file access list")
+            HGOTO_ERROR(H5E_FILE, H5E_BADTYPE, FAIL, "not a file access list")
 
         if(H5FD_MPIO == H5P_peek_driver(plist)) {
             const H5FD_mpio_fapl_t *fa; /* MPIO fapl info */
 
             if(NULL == (fa = (const H5FD_mpio_fapl_t *)H5P_peek_driver_info(plist)))
-                HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "bad VFL driver info")
+                HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "bad VFL driver info")
 
             *mpi_comm = fa->comm;
-        }
-    }
+        } /* end if */
+    } /* end else */
+
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5F_mpi_retrieve_comm */
 
+
 /*-------------------------------------------------------------------------
  * Function:    H5F_get_mpi_info
  *
diff --git a/src/H5Fpkg.h b/src/H5Fpkg.h
index 4dd9e20..050e426 100644
--- a/src/H5Fpkg.h
+++ b/src/H5Fpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -302,7 +300,8 @@ struct H5F_file_t {
     hsize_t	threshold;	/* Threshold for alignment		*/
     hsize_t	alignment;	/* Alignment				*/
     unsigned	gc_ref;		/* Garbage-collect references?		*/
-    unsigned	latest_flags;	/* The latest version support */
+    H5F_libver_t    low_bound;  /* The 'low' bound of library format versions */
+    H5F_libver_t    high_bound; /* The 'high' bound of library format versions */
     hbool_t	store_msg_crt_idx;  /* Store creation index for object header messages?	*/
     unsigned	ncwfs;		/* Num entries on cwfs list		*/
     struct H5HG_heap_t **cwfs;	/* Global heap cache			*/
@@ -311,16 +310,16 @@ struct H5F_file_t {
     H5UC_t *grp_btree_shared;   /* Ref-counted group B-tree node info   */
 
     /* File space allocation information */
-    H5F_fspace_strategy_t fs_strategy;      /* File space handling strategy	*/
+    H5F_fspace_strategy_t fs_strategy; /* File space handling strategy	*/
     hsize_t     fs_threshold;	/* Free space section threshold 	*/
-    hbool_t fs_persist;                     /* Free-space persist or not */
+    hbool_t     fs_persist;     /* Free-space persist or not */
     hbool_t     use_tmp_space;  /* Whether temp. file space allocation is allowed */
     haddr_t	tmp_addr;       /* Next address to use for temp. space in the file */
-    hbool_t point_of_no_return;             /* flag to indicate that we can't go back and delete a freespace header when it's used up */
+    hbool_t     point_of_no_return; /* Flag to indicate that we can't go back and delete a freespace header when it's used up */
 
     H5F_fs_state_t fs_state[H5F_MEM_PAGE_NTYPES];   /* State of free space manager for each type */
-    haddr_t fs_addr[H5F_MEM_PAGE_NTYPES];           /* Address of free space manager info for each type */
-    H5FS_t *fs_man[H5F_MEM_PAGE_NTYPES];            /* Free space manager for each file space type */
+    haddr_t fs_addr[H5F_MEM_PAGE_NTYPES];   /* Address of free space manager info for each type */
+    H5FS_t *fs_man[H5F_MEM_PAGE_NTYPES];    /* Free space manager for each file space type */
     hbool_t first_alloc_dealloc;            /* TRUE iff free space managers   */
                                             /* are persistant and have not    */
                                             /* been used accessed for either  */
@@ -335,25 +334,25 @@ struct H5F_file_t {
                                             /* HADDR_UNDEF if no cache image. */
 
     /* Free-space aggregation info */
-    unsigned fs_aggr_merge[H5FD_MEM_NTYPES];    /* Flags for whether free space can merge with aggregator(s) */
-    H5FD_mem_t fs_type_map[H5FD_MEM_NTYPES];    /* Mapping of "real" file space type into tracked type */
-    H5F_blk_aggr_t meta_aggr;   	        /* Metadata aggregation info (if aggregating metadata allocations) */
-    H5F_blk_aggr_t sdata_aggr;                  /* "Small data" aggregation info (if aggregating "small data" allocations) */
+    unsigned fs_aggr_merge[H5FD_MEM_NTYPES]; /* Flags for whether free space can merge with aggregator(s) */
+    H5FD_mem_t fs_type_map[H5FD_MEM_NTYPES]; /* Mapping of "real" file space type into tracked type */
+    H5F_blk_aggr_t meta_aggr;   	    /* Metadata aggregation info (if aggregating metadata allocations) */
+    H5F_blk_aggr_t sdata_aggr;              /* "Small data" aggregation info (if aggregating "small data" allocations) */
 
     /* Paged aggregation info */
-    hsize_t fs_page_size;                           /* File space page size */
-    size_t pgend_meta_thres;                        /* Do not track page end meta section <= this threshold */
+    hsize_t fs_page_size;                   /* File space page size */
+    size_t pgend_meta_thres;                /* Do not track page end meta section <= this threshold */
 
     /* Metadata accumulator information */
-    H5F_meta_accum_t accum;     /* Metadata accumulator info           	*/
+    H5F_meta_accum_t accum;                 /* Metadata accumulator info */
 
     /* Metadata retry info */
-    unsigned 		read_attempts;	/* The # of reads to try when reading metadata with checksum */
-    unsigned		retries_nbins;		/* # of bins for each retries[] */
+    unsigned 		read_attempts;	    /* The # of reads to try when reading metadata with checksum */
+    unsigned		retries_nbins;	    /* # of bins for each retries[] */
     uint32_t		*retries[H5AC_NTYPES];  /* Track # of read retries for metdata items with checksum */
 
     /* Object flush info */
-    H5F_object_flush_t 	object_flush;		/* Information for object flush callback */
+    H5F_object_flush_t 	object_flush;	    /* Information for object flush callback */
 };
 
 /*
@@ -362,16 +361,16 @@ struct H5F_file_t {
  * to shared H5F_file_t structs.
  */
 struct H5F_t {
-    char		*open_name;	/* Name used to open file	*/
-    char		*actual_name;	/* Actual name of the file, after resolving symlinks, etc. */
-    char               	*extpath;       /* Path for searching target external link file */
-    H5F_file_t		*shared;	/* The shared file info		*/
-    unsigned		nopen_objs;	/* Number of open object headers*/
-    H5FO_t              *obj_count;     /* # of time each object is opened through top file structure */
-    hid_t               file_id;        /* ID of this file              */
-    hbool_t             closing;        /* File is in the process of being closed */
-    struct H5F_t        *parent;        /* Parent file that this file is mounted to */
-    unsigned            nmounts;        /* Number of children mounted to this file */
+    char		       *open_name;      /* Name used to open file                                       */
+    char		       *actual_name;    /* Actual name of the file, after resolving symlinks, etc.      */
+    char               *extpath;        /* Path for searching target external link file                 */
+    H5F_file_t		   *shared;         /* The shared file info                                         */
+    unsigned		    nopen_objs;     /* Number of open object headers                                */
+    H5FO_t             *obj_count;      /* # of time each object is opened through top file structure   */
+    hid_t               file_id;        /* ID of this file                                              */
+    hbool_t             closing;        /* File is in the process of being closed                       */
+    struct H5F_t       *parent;         /* Parent file that this file is mounted to                     */
+    unsigned            nmounts;        /* Number of children mounted to this file                      */
 #ifdef H5_HAVE_PARALLEL
     H5P_coll_md_read_flag_t coll_md_read;  /* Do all metadata reads collectively */
     hbool_t             coll_md_write;  /* Do all metadata writes collectively */
@@ -397,43 +396,54 @@ H5FL_EXTERN(H5F_file_t);
 /* General routines */
 H5F_t *H5F_new(H5F_file_t *shared, unsigned flags, hid_t fcpl_id,
     hid_t fapl_id, H5FD_t *lf);
-H5_DLL herr_t H5F__dest(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t flush);
-H5_DLL herr_t H5F__flush(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t closing);
-H5_DLL htri_t H5F__is_hdf5(const char *name, hid_t meta_dxpl_id, hid_t raw_dxpl_id);
+H5_DLL herr_t H5F__dest(H5F_t *f, hbool_t flush);
+H5_DLL H5F_t *H5F__create(const char *filename, unsigned flags, hid_t fcpl_id,
+    hid_t fapl_id);
+H5_DLL H5F_t * H5F__open(const char *filename, unsigned flags, hid_t fcpl_id,
+    hid_t fapl_id);
+H5_DLL herr_t H5F__flush(H5F_t *f, H5F_scope_t scope);
+H5_DLL herr_t H5F__flush_real(H5F_t *f);
+H5_DLL htri_t H5F__is_hdf5(const char *name);
 H5_DLL herr_t H5F_get_objects(const H5F_t *f, unsigned types, size_t max_index, hid_t *obj_id_list, hbool_t app_ref, size_t *obj_id_count_ptr);
-H5_DLL ssize_t H5F_get_file_image(H5F_t *f, void *buf_ptr, size_t buf_len,
-    hid_t meta_dxpl_id, hid_t raw_dxpl_id);
-H5_DLL herr_t H5F_close(H5F_t *f);
+H5_DLL herr_t H5F__get_freespace(H5F_t *f, hsize_t *tot_space);
+H5_DLL ssize_t H5F__get_file_image(H5F_t *f, void *buf_ptr, size_t buf_len);
+H5_DLL herr_t H5F__get_info(H5F_t *f, H5F_info2_t *finfo);
+H5_DLL ssize_t H5F__get_free_sections(H5F_t *f, H5FD_mem_t type,
+    size_t nsects, H5F_sect_info_t *sect_info);
+H5_DLL herr_t H5F__get_metadata_read_retry_info(H5F_t *file, H5F_retry_info_t *info);
+H5_DLL herr_t H5F__format_convert(H5F_t *f);
+H5_DLL herr_t H5F__start_swmr_write(H5F_t *f);
+H5_DLL herr_t H5F__close(hid_t file_id);
+H5_DLL herr_t H5F__close_cb(H5F_t *f);
+H5_DLL herr_t H5F__set_libver_bounds(H5F_t *f, H5F_libver_t low, H5F_libver_t high);
 
 /* File mount related routines */
-H5_DLL herr_t H5F_close_mounts(H5F_t *f);
+H5_DLL herr_t H5F__close_mounts(H5F_t *f);
 H5_DLL int H5F_term_unmount_cb(void *obj_ptr, hid_t obj_id, void *key);
 H5_DLL herr_t H5F_mount_count_ids(H5F_t *f, unsigned *nopen_files, unsigned *nopen_objs);
 
 /* Superblock related routines */
-H5_DLL herr_t H5F__super_init(H5F_t *f, hid_t dxpl_id);
-H5_DLL herr_t H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id,
-    hbool_t initial_read);
-H5_DLL herr_t H5F__super_size(H5F_t *f, hid_t dxpl_id, hsize_t *super_size, hsize_t *super_ext_size);
+H5_DLL herr_t H5F__super_init(H5F_t *f);
+H5_DLL herr_t H5F__super_read(H5F_t *f, H5P_genplist_t *fa_plist, hbool_t initial_read);
+H5_DLL herr_t H5F__super_size(H5F_t *f, hsize_t *super_size, hsize_t *super_ext_size);
 H5_DLL herr_t H5F__super_free(H5F_super_t *sblock);
 
 /* Superblock extension related routines */
 H5_DLL herr_t H5F_super_ext_open(H5F_t *f, haddr_t ext_addr, H5O_loc_t *ext_ptr);
-H5_DLL herr_t H5F_super_ext_write_msg(H5F_t *f, hid_t dxpl_id, unsigned id,
-    void *mesg, hbool_t may_create, unsigned mesg_flags);
-H5_DLL herr_t H5F_super_ext_remove_msg(H5F_t *f, hid_t dxpl_id, unsigned id);
-H5_DLL herr_t H5F_super_ext_close(H5F_t *f, H5O_loc_t *ext_ptr, hid_t dxpl_id,
-    hbool_t was_created);
+H5_DLL herr_t H5F__super_ext_write_msg(H5F_t *f, unsigned id, void *mesg,
+    hbool_t may_create, unsigned mesg_flags);
+H5_DLL herr_t H5F__super_ext_remove_msg(H5F_t *f, unsigned id);
+H5_DLL herr_t H5F__super_ext_close(H5F_t *f, H5O_loc_t *ext_ptr, hbool_t was_created);
 
 /* Metadata accumulator routines */
-H5_DLL herr_t H5F__accum_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type,
-    haddr_t addr, size_t size, void *buf);
-H5_DLL herr_t H5F__accum_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type,
-    haddr_t addr, size_t size, const void *buf);
-H5_DLL herr_t H5F__accum_free(const H5F_io_info2_t *fio_info, H5FD_mem_t type,
-    haddr_t addr, hsize_t size);
-H5_DLL herr_t H5F__accum_flush(const H5F_io_info2_t *fio_info);
-H5_DLL herr_t H5F__accum_reset(const H5F_io_info2_t *fio_info, hbool_t flush);
+H5_DLL herr_t H5F__accum_read(H5F_t *f, H5FD_mem_t type, haddr_t addr,
+    size_t size, void *buf);
+H5_DLL herr_t H5F__accum_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
+    size_t size, const void *buf);
+H5_DLL herr_t H5F__accum_free(H5F_t *f, H5FD_mem_t type, haddr_t addr,
+    hsize_t size);
+H5_DLL herr_t H5F__accum_flush(H5F_t *f);
+H5_DLL herr_t H5F__accum_reset(H5F_t *f, hbool_t flush);
 
 /* Shared file list related routines */
 H5_DLL herr_t H5F_sfile_add(H5F_file_t *shared);
@@ -442,24 +452,27 @@ H5_DLL herr_t H5F_sfile_remove(H5F_file_t *shared);
 
 /* External file cache routines */
 H5_DLL H5F_efc_t *H5F_efc_create(unsigned max_nfiles);
+H5_DLL H5F_t *H5F__efc_open(H5F_t *parent, const char *name, unsigned flags,
+    hid_t fcpl_id, hid_t fapl_id);
 H5_DLL unsigned H5F_efc_max_nfiles(H5F_efc_t *efc);
-H5_DLL herr_t H5F_efc_release(H5F_efc_t *efc);
-H5_DLL herr_t H5F_efc_destroy(H5F_efc_t *efc);
-H5_DLL herr_t H5F_efc_try_close(H5F_t *f);
+H5_DLL herr_t H5F__efc_release(H5F_efc_t *efc);
+H5_DLL herr_t H5F__efc_destroy(H5F_efc_t *efc);
+H5_DLL herr_t H5F__efc_try_close(H5F_t *f);
 
 /* Space allocation routines */
-H5_DLL haddr_t H5F_alloc(H5F_t *f, hid_t dxpl_id, H5F_mem_t type, hsize_t size, haddr_t *frag_addr, hsize_t *frag_size);
-H5_DLL herr_t H5F_free(H5F_t *f, hid_t dxpl_id, H5F_mem_t type, haddr_t addr, hsize_t size);
-H5_DLL htri_t H5F_try_extend(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, 
-    haddr_t blk_end, hsize_t extra_requested);
+H5_DLL haddr_t H5F__alloc(H5F_t *f, H5F_mem_t type, hsize_t size, haddr_t *frag_addr, hsize_t *frag_size);
+H5_DLL herr_t H5F__free(H5F_t *f, H5F_mem_t type, haddr_t addr, hsize_t size);
+H5_DLL htri_t H5F__try_extend(H5F_t *f, H5FD_mem_t type, haddr_t blk_end,
+    hsize_t extra_requested);
 
 /* Functions that get/retrieve values from VFD layer */
 H5_DLL herr_t H5F__set_eoa(const H5F_t *f, H5F_mem_t type, haddr_t addr);
 H5_DLL herr_t H5F__set_base_addr(const H5F_t *f, haddr_t addr);
 H5_DLL herr_t H5F__set_paged_aggr(const H5F_t *f, hbool_t paged);
+H5_DLL herr_t H5F__get_max_eof_eoa(const H5F_t *f, haddr_t *max_eof_eoa);
 
 /* Functions that flush or evict */
-H5_DLL herr_t H5F__evict_cache_entries(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5F__evict_cache_entries(H5F_t *f);
 
 /* Testing functions */
 #ifdef H5F_TESTING
diff --git a/src/H5Fprivate.h b/src/H5Fprivate.h
index 8ef353a..3e77700 100644
--- a/src/H5Fprivate.h
+++ b/src/H5Fprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -20,17 +18,20 @@
 #ifndef _H5Fprivate_H
 #define _H5Fprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5F_t H5F_t;
+
 /* Include package's public header */
 #include "H5Fpublic.h"
 
 /* Public headers needed by this file */
-#include "H5FDpublic.h"		/* File drivers				*/
+#include "H5FDpublic.h"        /* File drivers                */
 
 /* Private headers needed by this file */
 #ifdef H5_HAVE_PARALLEL
-#include "H5Pprivate.h"		/* Property lists			*/
+#include "H5Pprivate.h"        /* Property lists            */
 #endif /* H5_HAVE_PARALLEL */
-#include "H5VMprivate.h"		/* Vectors and arrays */
+#include "H5VMprivate.h"        /* Vectors and arrays */
 
 
 /**************************/
@@ -42,68 +43,68 @@
  * Currently, all file meta-data is little-endian.
  */
 
-#  define INT16ENCODE(p, i) {						      \
-   *(p) = (uint8_t)( (unsigned)(i)	 & 0xff); (p)++;		      \
-   *(p) = (uint8_t)(((unsigned)(i) >> 8) & 0xff); (p)++;		      \
+#  define INT16ENCODE(p, i) {                              \
+   *(p) = (uint8_t)( (unsigned)(i)     & 0xff); (p)++;              \
+   *(p) = (uint8_t)(((unsigned)(i) >> 8) & 0xff); (p)++;              \
 }
 
-#  define UINT16ENCODE(p, i) {						      \
-   *(p) = (uint8_t)( (unsigned)(i)	 & 0xff); (p)++;		      \
-   *(p) = (uint8_t)(((unsigned)(i) >> 8) & 0xff); (p)++;		      \
+#  define UINT16ENCODE(p, i) {                              \
+   *(p) = (uint8_t)( (unsigned)(i)     & 0xff); (p)++;              \
+   *(p) = (uint8_t)(((unsigned)(i) >> 8) & 0xff); (p)++;              \
 }
 
-#  define INT32ENCODE(p, i) {						      \
-   *(p) = (uint8_t)( (uint32_t)(i)	  & 0xff); (p)++;		      \
-   *(p) = (uint8_t)(((uint32_t)(i) >>  8) & 0xff); (p)++;		      \
-   *(p) = (uint8_t)(((uint32_t)(i) >> 16) & 0xff); (p)++;		      \
-   *(p) = (uint8_t)(((uint32_t)(i) >> 24) & 0xff); (p)++;		      \
+#  define INT32ENCODE(p, i) {                              \
+   *(p) = (uint8_t)( (uint32_t)(i)      & 0xff); (p)++;              \
+   *(p) = (uint8_t)(((uint32_t)(i) >>  8) & 0xff); (p)++;              \
+   *(p) = (uint8_t)(((uint32_t)(i) >> 16) & 0xff); (p)++;              \
+   *(p) = (uint8_t)(((uint32_t)(i) >> 24) & 0xff); (p)++;              \
 }
 
-#  define UINT32ENCODE(p, i) {						      \
-   *(p) = (uint8_t)( (i)        & 0xff); (p)++;				      \
-   *(p) = (uint8_t)(((i) >>  8) & 0xff); (p)++;				      \
-   *(p) = (uint8_t)(((i) >> 16) & 0xff); (p)++;				      \
-   *(p) = (uint8_t)(((i) >> 24) & 0xff); (p)++;				      \
+#  define UINT32ENCODE(p, i) {                              \
+   *(p) = (uint8_t)( (i)        & 0xff); (p)++;                      \
+   *(p) = (uint8_t)(((i) >>  8) & 0xff); (p)++;                      \
+   *(p) = (uint8_t)(((i) >> 16) & 0xff); (p)++;                      \
+   *(p) = (uint8_t)(((i) >> 24) & 0xff); (p)++;                      \
 }
 
 /* Encode an unsigned integer into a variable-sized buffer */
 /* (Assumes that the high bits of the integer are zero) */
-#  define ENCODE_VAR(p, typ, n, l) {					      \
-   typ _n = (n);							      \
-   size_t _i;								      \
-   uint8_t *_p = (uint8_t*)(p);						      \
-									      \
-   for(_i = 0; _i < l; _i++, _n >>= 8)					      \
-      *_p++ = (uint8_t)(_n & 0xff);					      \
-   (p) = (uint8_t*)(p) + l;						      \
+#  define ENCODE_VAR(p, typ, n, l) {                          \
+   typ _n = (n);                                  \
+   size_t _i;                                      \
+   uint8_t *_p = (uint8_t*)(p);                              \
+                                        \
+   for(_i = 0; _i < l; _i++, _n >>= 8)                          \
+      *_p++ = (uint8_t)(_n & 0xff);                          \
+   (p) = (uint8_t*)(p) + l;                              \
 }
 
 /* Encode a 32-bit unsigned integer into a variable-sized buffer */
 /* (Assumes that the high bits of the integer are zero) */
 #  define UINT32ENCODE_VAR(p, n, l)     ENCODE_VAR(p, uint32_t, n, l)
 
-#  define INT64ENCODE(p, n) {						      \
-   int64_t _n = (n);							      \
-   size_t _i;								      \
-   uint8_t *_p = (uint8_t*)(p);						      \
-									      \
-   for (_i = 0; _i < sizeof(int64_t); _i++, _n >>= 8)			      \
-      *_p++ = (uint8_t)(_n & 0xff);					      \
-   for (/*void*/; _i < 8; _i++)						      \
-      *_p++ = (n) < 0 ? 0xff : 0;					      \
-   (p) = (uint8_t*)(p)+8;						      \
+#  define INT64ENCODE(p, n) {                              \
+   int64_t _n = (n);                                  \
+   size_t _i;                                      \
+   uint8_t *_p = (uint8_t*)(p);                              \
+                                        \
+   for (_i = 0; _i < sizeof(int64_t); _i++, _n >>= 8)                  \
+      *_p++ = (uint8_t)(_n & 0xff);                          \
+   for (/*void*/; _i < 8; _i++)                              \
+      *_p++ = (n) < 0 ? 0xff : 0;                          \
+   (p) = (uint8_t*)(p)+8;                              \
 }
 
-#  define UINT64ENCODE(p, n) {						      \
-   uint64_t _n = (n);							      \
-   size_t _i;								      \
-   uint8_t *_p = (uint8_t*)(p);						      \
-									      \
-   for (_i = 0; _i < sizeof(uint64_t); _i++, _n >>= 8)			      \
-      *_p++ = (uint8_t)(_n & 0xff);					      \
-   for (/*void*/; _i < 8; _i++)						      \
-      *_p++ = 0;							      \
-   (p) = (uint8_t*)(p) + 8;						      \
+#  define UINT64ENCODE(p, n) {                              \
+   uint64_t _n = (n);                                  \
+   size_t _i;                                      \
+   uint8_t *_p = (uint8_t*)(p);                              \
+                                        \
+   for (_i = 0; _i < sizeof(uint64_t); _i++, _n >>= 8)                  \
+      *_p++ = (uint8_t)(_n & 0xff);                          \
+   for (/*void*/; _i < 8; _i++)                              \
+      *_p++ = 0;                                  \
+   (p) = (uint8_t*)(p) + 8;                              \
 }
 
 /* Encode a 64-bit unsigned integer into a variable-sized buffer */
@@ -112,31 +113,31 @@
 
 /* Encode a 64-bit unsigned integer and its length into a variable-sized buffer */
 /* (Assumes that the high bits of the integer are zero) */
-#  define UINT64ENCODE_VARLEN(p, n) {					      \
-   uint64_t __n = (uint64_t)(n);							      \
-   unsigned _s = H5VM_limit_enc_size(__n);				      \
-									      \
-   *(p)++ = (uint8_t)_s;						      \
-   UINT64ENCODE_VAR(p, __n, _s);						      \
+#  define UINT64ENCODE_VARLEN(p, n) {                          \
+   uint64_t __n = (uint64_t)(n);                                  \
+   unsigned _s = H5VM_limit_enc_size(__n);                      \
+                                        \
+   *(p)++ = (uint8_t)_s;                              \
+   UINT64ENCODE_VAR(p, __n, _s);                              \
 }
 
-#  define H5_ENCODE_UNSIGNED(p, n) {					      \
-    HDcompile_assert(sizeof(unsigned) == sizeof(uint32_t));		      \
-    UINT32ENCODE(p, n)							      \
+#  define H5_ENCODE_UNSIGNED(p, n) {                          \
+    HDcompile_assert(sizeof(unsigned) == sizeof(uint32_t));              \
+    UINT32ENCODE(p, n)                                  \
 }
 
 /* Assumes the endianness of uint64_t is the same as double */
-#  define H5_ENCODE_DOUBLE(p, n) {					      \
-    uint64_t _n;							      \
-    size_t _u;								      \
-    uint8_t *_p = (uint8_t*)(p);					      \
-									      \
-    HDcompile_assert(sizeof(double) == 8);				      \
-    HDcompile_assert(sizeof(double) == sizeof(uint64_t));		      \
-    HDmemcpy(&_n, &n, sizeof(double));					      \
-    for(_u = 0; _u < sizeof(uint64_t); _u++, _n >>= 8)			      \
-        *_p++ = (uint8_t)(_n & 0xff);					      \
-    (p) = (uint8_t *)(p) + 8;						      \
+#  define H5_ENCODE_DOUBLE(p, n) {                          \
+    uint64_t _n;                                  \
+    size_t _u;                                      \
+    uint8_t *_p = (uint8_t*)(p);                          \
+                                        \
+    HDcompile_assert(sizeof(double) == 8);                      \
+    HDcompile_assert(sizeof(double) == sizeof(uint64_t));              \
+    HDmemcpy(&_n, &n, sizeof(double));                          \
+    for(_u = 0; _u < sizeof(uint64_t); _u++, _n >>= 8)                  \
+        *_p++ = (uint8_t)(_n & 0xff);                          \
+    (p) = (uint8_t *)(p) + 8;                              \
 }
 
 /* DECODE converts little endian bytes pointed by p to integer values and store
@@ -147,68 +148,68 @@
  * correctly even if i is actually a 64bit int like in a Cray.
  */
 
-#  define INT16DECODE(p, i) {						      \
-   (i)	= (int16_t)((*(p) & 0xff));      (p)++;				      \
+#  define INT16DECODE(p, i) {                              \
+   (i)    = (int16_t)((*(p) & 0xff));      (p)++;                      \
    (i) |= (int16_t)(((*(p) & 0xff) << 8) |                                    \
-                   ((*(p) & 0x80) ? ~0xffff : 0x0)); (p)++;		      \
+                   ((*(p) & 0x80) ? ~0xffff : 0x0)); (p)++;              \
 }
 
-#  define UINT16DECODE(p, i) {						      \
-   (i)	= (uint16_t) (*(p) & 0xff);	  (p)++;			      \
-   (i) |= (uint16_t)((*(p) & 0xff) << 8); (p)++;			      \
+#  define UINT16DECODE(p, i) {                              \
+   (i)    = (uint16_t) (*(p) & 0xff);      (p)++;                  \
+   (i) |= (uint16_t)((*(p) & 0xff) << 8); (p)++;                  \
 }
 
-#  define INT32DECODE(p, i) {						      \
-   (i)	= ((int32_t)(*(p) & (unsigned)0xff));	  (p)++;		      \
-   (i) |= ((int32_t)(*(p) & (unsigned)0xff) <<  8); (p)++;		      \
-   (i) |= ((int32_t)(*(p) & (unsigned)0xff) << 16); (p)++;		      \
+#  define INT32DECODE(p, i) {                              \
+   (i)    = ((int32_t)(*(p) & (unsigned)0xff));      (p)++;              \
+   (i) |= ((int32_t)(*(p) & (unsigned)0xff) <<  8); (p)++;              \
+   (i) |= ((int32_t)(*(p) & (unsigned)0xff) << 16); (p)++;              \
    (i) |= ((int32_t)(((*(p) & (unsigned)0xff) << 24) |                        \
                    ((*(p) & (unsigned)0x80) ? (unsigned)(~0xffffffff) : (unsigned)0x0))); (p)++; \
 }
 
-#  define UINT32DECODE(p, i) {						      \
-   (i)	=  (uint32_t)(*(p) & 0xff);	   (p)++;			      \
-   (i) |= ((uint32_t)(*(p) & 0xff) <<  8); (p)++;			      \
-   (i) |= ((uint32_t)(*(p) & 0xff) << 16); (p)++;			      \
-   (i) |= ((uint32_t)(*(p) & 0xff) << 24); (p)++;			      \
+#  define UINT32DECODE(p, i) {                              \
+   (i)    =  (uint32_t)(*(p) & 0xff);       (p)++;                  \
+   (i) |= ((uint32_t)(*(p) & 0xff) <<  8); (p)++;                  \
+   (i) |= ((uint32_t)(*(p) & 0xff) << 16); (p)++;                  \
+   (i) |= ((uint32_t)(*(p) & 0xff) << 24); (p)++;                  \
 }
 
 /* Decode a variable-sized buffer */
 /* (Assumes that the high bits of the integer will be zero) */
-#  define DECODE_VAR(p, n, l) {						      \
-   size_t _i;								      \
-									      \
-   n = 0;								      \
-   (p) += l;								      \
-   for (_i = 0; _i < l; _i++)						      \
-      n = (n << 8) | *(--p);						      \
-   (p) += l;								      \
+#  define DECODE_VAR(p, n, l) {                              \
+   size_t _i;                                      \
+                                        \
+   n = 0;                                      \
+   (p) += l;                                      \
+   for (_i = 0; _i < l; _i++)                              \
+      n = (n << 8) | *(--p);                              \
+   (p) += l;                                      \
 }
 
 /* Decode a variable-sized buffer into a 32-bit unsigned integer */
 /* (Assumes that the high bits of the integer will be zero) */
 #  define UINT32DECODE_VAR(p, n, l)     DECODE_VAR(p, n, l)
 
-#  define INT64DECODE(p, n) {						      \
-   /* WE DON'T CHECK FOR OVERFLOW! */					      \
-   size_t _i;								      \
-									      \
-   n = 0;								      \
-   (p) += 8;								      \
-   for (_i = 0; _i < sizeof(int64_t); _i++)					      \
-      n = (n << 8) | *(--p);						      \
-   (p) += 8;								      \
+#  define INT64DECODE(p, n) {                              \
+   /* WE DON'T CHECK FOR OVERFLOW! */                          \
+   size_t _i;                                      \
+                                        \
+   n = 0;                                      \
+   (p) += 8;                                      \
+   for (_i = 0; _i < sizeof(int64_t); _i++)                          \
+      n = (n << 8) | *(--p);                              \
+   (p) += 8;                                      \
 }
 
-#  define UINT64DECODE(p, n) {						      \
-   /* WE DON'T CHECK FOR OVERFLOW! */					      \
-   size_t _i;								      \
-									      \
-   n = 0;								      \
-   (p) += 8;								      \
-   for (_i = 0; _i < sizeof(uint64_t); _i++)				      \
-      n = (n << 8) | *(--p);						      \
-   (p) += 8;								      \
+#  define UINT64DECODE(p, n) {                              \
+   /* WE DON'T CHECK FOR OVERFLOW! */                          \
+   size_t _i;                                      \
+                                        \
+   n = 0;                                      \
+   (p) += 8;                                      \
+   for (_i = 0; _i < sizeof(uint64_t); _i++)                      \
+      n = (n << 8) | *(--p);                              \
+   (p) += 8;                                      \
 }
 
 /* Decode a variable-sized buffer into a 64-bit unsigned integer */
@@ -217,63 +218,65 @@
 
 /* Decode a 64-bit unsigned integer and its length from a variable-sized buffer */
 /* (Assumes that the high bits of the integer will be zero) */
-#  define UINT64DECODE_VARLEN(p, n) {					      \
-   unsigned _s = *(p)++;						      \
-									      \
-   UINT64DECODE_VAR(p, n, _s);						      \
+#  define UINT64DECODE_VARLEN(p, n) {                          \
+   unsigned _s = *(p)++;                              \
+                                        \
+   UINT64DECODE_VAR(p, n, _s);                              \
 }
 
-#  define H5_DECODE_UNSIGNED(p, n) {					      \
-    HDcompile_assert(sizeof(unsigned) == sizeof(uint32_t));		      \
-    UINT32DECODE(p, n)							      \
+#  define H5_DECODE_UNSIGNED(p, n) {                          \
+    HDcompile_assert(sizeof(unsigned) == sizeof(uint32_t));              \
+    UINT32DECODE(p, n)                                  \
 }
 
 /* Assumes the endianness of uint64_t is the same as double */
-#  define H5_DECODE_DOUBLE(p, n) {					      \
-    uint64_t _n;							      \
-    size_t _u;								      \
-									      \
-    HDcompile_assert(sizeof(double) == 8);				      \
-    HDcompile_assert(sizeof(double) == sizeof(uint64_t));		      \
-    _n = 0;								      \
-    (p) += 8;								      \
-    for(_u = 0; _u < sizeof(uint64_t); _u++)				      \
-        _n = (_n << 8) | *(--p);					      \
-    HDmemcpy(&(n), &_n, sizeof(double));					      \
-    (p) += 8;								      \
+#  define H5_DECODE_DOUBLE(p, n) {                          \
+    uint64_t _n;                                  \
+    size_t _u;                                      \
+                                        \
+    HDcompile_assert(sizeof(double) == 8);                      \
+    HDcompile_assert(sizeof(double) == sizeof(uint64_t));              \
+    _n = 0;                                      \
+    (p) += 8;                                      \
+    for(_u = 0; _u < sizeof(uint64_t); _u++)                      \
+        _n = (_n << 8) | *(--p);                          \
+    HDmemcpy(&(n), &_n, sizeof(double));                          \
+    (p) += 8;                                      \
 }
 
 /* Address-related macros */
-#define H5F_addr_overflow(X,Z)	(HADDR_UNDEF==(X) ||			      \
-				 HADDR_UNDEF==(X)+(haddr_t)(Z) ||	      \
-				 (X)+(haddr_t)(Z)<(X))
-#define H5F_addr_defined(X)	((X)!=HADDR_UNDEF)
+#define H5F_addr_overflow(X,Z)    (HADDR_UNDEF==(X) ||                  \
+                HADDR_UNDEF==(X)+(haddr_t)(Z) ||          \
+                (X)+(haddr_t)(Z)<(X))
+#define H5F_addr_defined(X)    ((X)!=HADDR_UNDEF)
 /* The H5F_addr_eq() macro guarantees that Y is not HADDR_UNDEF by making
  * certain that X is not HADDR_UNDEF and then checking that X equals Y
  */
-#define H5F_addr_eq(X,Y)	((X)!=HADDR_UNDEF &&			      \
-				 (X)==(Y))
-#define H5F_addr_ne(X,Y)	(!H5F_addr_eq((X),(Y)))
-#define H5F_addr_lt(X,Y) 	((X)!=HADDR_UNDEF &&			      \
-				 (Y)!=HADDR_UNDEF &&			      \
-				 (X)<(Y))
-#define H5F_addr_le(X,Y)	((X)!=HADDR_UNDEF &&			      \
-				 (Y)!=HADDR_UNDEF &&			      \
-				 (X)<=(Y))
-#define H5F_addr_gt(X,Y)	((X)!=HADDR_UNDEF &&			      \
-				 (Y)!=HADDR_UNDEF &&			      \
-				 (X)>(Y))
-#define H5F_addr_ge(X,Y)	((X)!=HADDR_UNDEF &&			      \
-				 (Y)!=HADDR_UNDEF &&			      \
-				 (X)>=(Y))
-#define H5F_addr_cmp(X,Y)	(H5F_addr_eq((X), (Y)) ? 0 :		      \
-				 (H5F_addr_lt((X), (Y)) ? -1 : 1))
-#define H5F_addr_pow2(N)	((haddr_t)1<<(N))
+#define H5F_addr_eq(X,Y)    ((X)!=HADDR_UNDEF &&                  \
+                (X)==(Y))
+#define H5F_addr_ne(X,Y)    (!H5F_addr_eq((X),(Y)))
+#define H5F_addr_lt(X,Y)     ((X)!=HADDR_UNDEF &&                  \
+                (Y)!=HADDR_UNDEF &&                  \
+                (X)<(Y))
+#define H5F_addr_le(X,Y)    ((X)!=HADDR_UNDEF &&                  \
+                (Y)!=HADDR_UNDEF &&                  \
+                (X)<=(Y))
+#define H5F_addr_gt(X,Y)    ((X)!=HADDR_UNDEF &&                  \
+                (Y)!=HADDR_UNDEF &&                  \
+                (X)>(Y))
+#define H5F_addr_ge(X,Y)    ((X)!=HADDR_UNDEF &&                  \
+                (Y)!=HADDR_UNDEF &&                  \
+                (X)>=(Y))
+#define H5F_addr_cmp(X,Y)    (H5F_addr_eq((X), (Y)) ? 0 :              \
+                (H5F_addr_lt((X), (Y)) ? -1 : 1))
+#define H5F_addr_pow2(N)    ((haddr_t)1<<(N))
 #define H5F_addr_overlap(O1,L1,O2,L2) (((O1) < (O2) && ((O1) + (L1)) > (O2)) || \
                                  ((O1) >= (O2) && (O1) < ((O2) + (L2))))
 
 /* If the module using this macro is allowed access to the private variables, access them directly */
 #ifdef H5F_MODULE
+#define H5F_LOW_BOUND(F)        ((F)->shared->low_bound)
+#define H5F_HIGH_BOUND(F)       ((F)->shared->high_bound)
 #define H5F_INTENT(F)           ((F)->shared->flags)
 #define H5F_OPEN_NAME(F)        ((F)->open_name)
 #define H5F_ACTUAL_NAME(F)      ((F)->actual_name)
@@ -293,7 +296,7 @@
 #define H5F_BASE_ADDR(F)        ((F)->shared->sblock->base_addr)
 #define H5F_SYM_LEAF_K(F)       ((F)->shared->sblock->sym_leaf_k)
 #define H5F_KVALUE(F,T)         ((F)->shared->sblock->btree_k[(T)->id])
-#define H5F_NREFS(F)		((F)->shared->nrefs)
+#define H5F_NREFS(F)        ((F)->shared->nrefs)
 #define H5F_SIZEOF_ADDR(F)      ((F)->shared->sizeof_addr)
 #define H5F_SIZEOF_SIZE(F)      ((F)->shared->sizeof_size)
 #define H5F_SOHM_ADDR(F)        ((F)->shared->sohm_addr)
@@ -310,27 +313,27 @@
 #define H5F_RDCC_W0(F)          ((F)->shared->rdcc_w0)
 #define H5F_SIEVE_BUF_SIZE(F)   ((F)->shared->sieve_buf_size)
 #define H5F_GC_REF(F)           ((F)->shared->gc_ref)
-#define H5F_USE_LATEST_FLAGS(F,FL)  ((F)->shared->latest_flags & (FL))
 #define H5F_STORE_MSG_CRT_IDX(F)    ((F)->shared->store_msg_crt_idx)
 #define H5F_SET_STORE_MSG_CRT_IDX(F, FL)    ((F)->shared->store_msg_crt_idx = (FL))
 #define H5F_GRP_BTREE_SHARED(F) ((F)->shared->grp_btree_shared)
 #define H5F_SET_GRP_BTREE_SHARED(F, RC) (((F)->shared->grp_btree_shared = (RC)) ? SUCCEED : FAIL)
 #define H5F_USE_TMP_SPACE(F)    ((F)->shared->fs.use_tmp_space)
 #define H5F_IS_TMP_ADDR(F, ADDR) (H5F_addr_le((F)->shared->fs.tmp_addr, (ADDR)))
-#define H5F_SET_LATEST_FLAGS(F, FL)  ((F)->shared->latest_flags = (FL))
 #ifdef H5_HAVE_PARALLEL
 #define H5F_COLL_MD_READ(F)     ((F)->coll_md_read)
 #endif /* H5_HAVE_PARALLEL */
 #define H5F_USE_MDC_LOGGING(F)  ((F)->shared->use_mdc_logging)
 #define H5F_START_MDC_LOG_ON_ACCESS(F)  ((F)->shared->start_mdc_log_on_access)
 #define H5F_MDC_LOG_LOCATION(F) ((F)->shared->mdc_log_location)
-#define H5F_ALIGNMENT(F)   	((F)->shared->alignment)
-#define H5F_THRESHOLD(F)   	((F)->shared->threshold)
+#define H5F_ALIGNMENT(F)       ((F)->shared->alignment)
+#define H5F_THRESHOLD(F)       ((F)->shared->threshold)
 #define H5F_PGEND_META_THRES(F) ((F)->shared->fs.pgend_meta_thres)
 #define H5F_POINT_OF_NO_RETURN(F) ((F)->shared->fs.point_of_no_return)
 #define H5F_FIRST_ALLOC_DEALLOC(F) ((F)->shared->first_alloc_dealloc)
 #define H5F_EOA_PRE_FSM_FSALLOC(F) ((F)->shared->eoa_pre_fsm_fsalloc)
 #else /* H5F_MODULE */
+#define H5F_LOW_BOUND(F)        (H5F_get_low_bound(F))
+#define H5F_HIGH_BOUND(F)       (H5F_get_high_bound(F))
 #define H5F_INTENT(F)           (H5F_get_intent(F))
 #define H5F_OPEN_NAME(F)        (H5F_get_open_name(F))
 #define H5F_ACTUAL_NAME(F)      (H5F_get_actual_name(F))
@@ -350,7 +353,7 @@
 #define H5F_BASE_ADDR(F)        (H5F_get_base_addr(F))
 #define H5F_SYM_LEAF_K(F)       (H5F_sym_leaf_k(F))
 #define H5F_KVALUE(F,T)         (H5F_Kvalue(F,T))
-#define H5F_NREFS(F)		(H5F_get_nrefs(F))
+#define H5F_NREFS(F)        (H5F_get_nrefs(F))
 #define H5F_SIZEOF_ADDR(F)      (H5F_sizeof_addr(F))
 #define H5F_SIZEOF_SIZE(F)      (H5F_sizeof_size(F))
 #define H5F_SOHM_ADDR(F)        (H5F_get_sohm_addr(F))
@@ -367,22 +370,20 @@
 #define H5F_RDCC_W0(F)          (H5F_rdcc_w0(F))
 #define H5F_SIEVE_BUF_SIZE(F)   (H5F_sieve_buf_size(F))
 #define H5F_GC_REF(F)           (H5F_gc_ref(F))
-#define H5F_USE_LATEST_FLAGS(F,FL) (H5F_use_latest_flags(F,FL))
 #define H5F_STORE_MSG_CRT_IDX(F) (H5F_store_msg_crt_idx(F))
 #define H5F_SET_STORE_MSG_CRT_IDX(F, FL)    (H5F_set_store_msg_crt_idx((F), (FL)))
 #define H5F_GRP_BTREE_SHARED(F) (H5F_grp_btree_shared(F))
 #define H5F_SET_GRP_BTREE_SHARED(F, RC) (H5F_set_grp_btree_shared((F), (RC)))
 #define H5F_USE_TMP_SPACE(F)    (H5F_use_tmp_space(F))
 #define H5F_IS_TMP_ADDR(F, ADDR) (H5F_is_tmp_addr((F), (ADDR)))
-#define H5F_SET_LATEST_FLAGS(F, FL)  (H5F_set_latest_flags((F), (FL)))
 #ifdef H5_HAVE_PARALLEL
 #define H5F_COLL_MD_READ(F)     (H5F_coll_md_read(F))
 #endif /* H5_HAVE_PARALLEL */
 #define H5F_USE_MDC_LOGGING(F)  (H5F_use_mdc_logging(F))
 #define H5F_START_MDC_LOG_ON_ACCESS(F)  (H5F_start_mdc_log_on_access(F))
 #define H5F_MDC_LOG_LOCATION(F) (H5F_mdc_log_location(F))
-#define H5F_ALIGNMENT(F)    	(H5F_get_alignment(F))
-#define H5F_THRESHOLD(F)    	(H5F_get_threshold(F))
+#define H5F_ALIGNMENT(F)        (H5F_get_alignment(F))
+#define H5F_THRESHOLD(F)        (H5F_get_threshold(F))
 #define H5F_PGEND_META_THRES(F) (H5F_get_pgend_meta_thres(F))
 #define H5F_POINT_OF_NO_RETURN(F) (H5F_get_point_of_no_return(F))
 #define H5F_FIRST_ALLOC_DEALLOC(F) (H5F_get_first_alloc_dealloc(F))
@@ -391,32 +392,32 @@
 
 
 /* Macros to encode/decode offset/length's for storing in the file */
-#define H5F_ENCODE_OFFSET(f,p,o) switch(H5F_SIZEOF_ADDR(f)) {		      \
-    case 4: UINT32ENCODE(p,o); break;					      \
-    case 8: UINT64ENCODE(p,o); break;					      \
-    case 2: UINT16ENCODE(p,o); break;					      \
+#define H5F_ENCODE_OFFSET(f,p,o) switch(H5F_SIZEOF_ADDR(f)) {              \
+    case 4: UINT32ENCODE(p,o); break;                          \
+    case 8: UINT64ENCODE(p,o); break;                          \
+    case 2: UINT16ENCODE(p,o); break;                          \
 }
 
-#define H5F_DECODE_OFFSET(f,p,o) switch (H5F_SIZEOF_ADDR (f)) {		      \
-    case 4: UINT32DECODE(p, o); break;					      \
-    case 8: UINT64DECODE(p, o); break;					      \
-    case 2: UINT16DECODE(p, o); break;					      \
+#define H5F_DECODE_OFFSET(f,p,o) switch (H5F_SIZEOF_ADDR (f)) {              \
+    case 4: UINT32DECODE(p, o); break;                          \
+    case 8: UINT64DECODE(p, o); break;                          \
+    case 2: UINT16DECODE(p, o); break;                          \
 }
 
-#define H5F_ENCODE_LENGTH_LEN(p,l,s) switch(s) {		      	      \
-    case 4: UINT32ENCODE(p,l); break;					      \
-    case 8: UINT64ENCODE(p,l); break;					      \
-    case 2: UINT16ENCODE(p,l); break;					      \
-    default: HDassert("bad sizeof size" && 0);				      \
+#define H5F_ENCODE_LENGTH_LEN(p,l,s) switch(s) {                        \
+    case 4: UINT32ENCODE(p,l); break;                          \
+    case 8: UINT64ENCODE(p,l); break;                          \
+    case 2: UINT16ENCODE(p,l); break;                          \
+    default: HDassert("bad sizeof size" && 0);                      \
 }
 
 #define H5F_ENCODE_LENGTH(f,p,l) H5F_ENCODE_LENGTH_LEN(p,l,H5F_SIZEOF_SIZE(f))
 
-#define H5F_DECODE_LENGTH_LEN(p,l,s) switch(s) {		              \
-    case 4: UINT32DECODE(p,l); break;					      \
-    case 8: UINT64DECODE(p,l); break;					      \
-    case 2: UINT16DECODE(p,l); break;					      \
-    default: HDassert("bad sizeof size" && 0);				      \
+#define H5F_DECODE_LENGTH_LEN(p,l,s) switch(s) {                      \
+    case 4: UINT32DECODE(p,l); break;                          \
+    case 8: UINT64DECODE(p,l); break;                          \
+    case 2: UINT16DECODE(p,l); break;                          \
+    default: HDassert("bad sizeof size" && 0);                      \
 }
 
 #define H5F_DECODE_LENGTH(f,p,l) H5F_DECODE_LENGTH_LEN(p,l,H5F_SIZEOF_SIZE(f))
@@ -426,13 +427,13 @@
  * with.
  */
 #if (H5_SIZEOF_SIZE_T >= H5_SIZEOF_OFF_T)
-#   define H5F_OVERFLOW_SIZET2OFFT(X)					      \
+#   define H5F_OVERFLOW_SIZET2OFFT(X)                          \
     ((size_t)(X)>=(size_t)((size_t)1<<(8*sizeof(HDoff_t)-1)))
 #else
 #   define H5F_OVERFLOW_SIZET2OFFT(X) 0
 #endif
 #if (H5_SIZEOF_HSIZE_T >= H5_SIZEOF_OFF_T)
-#   define H5F_OVERFLOW_HSIZET2OFFT(X)					      \
+#   define H5F_OVERFLOW_HSIZET2OFFT(X)                          \
     ((hsize_t)(X) >= (hsize_t)((hsize_t)1 << (8 * sizeof(HDoff_t) - 1)))
 #else
 #   define H5F_OVERFLOW_HSIZET2OFFT(X) 0
@@ -460,14 +461,14 @@
 #define H5F_CRT_SHMSG_LIST_MAX_NAME  "shmsg_list_max"   /* Shared message list maximum size */
 #define H5F_CRT_SHMSG_BTREE_MIN_NAME "shmsg_btree_min"  /* Shared message B-tree minimum size */
 #define H5F_CRT_FILE_SPACE_STRATEGY_NAME "file_space_strategy"  /* File space handling strategy */
-#define H5F_CRT_FREE_SPACE_PERSIST_NAME "free_space_persist"  	/* Free-space persisting status */
+#define H5F_CRT_FREE_SPACE_PERSIST_NAME "free_space_persist"      /* Free-space persisting status */
 #define H5F_CRT_FREE_SPACE_THRESHOLD_NAME "free_space_threshold"  /* Free space section threshold */
 #define H5F_CRT_FILE_SPACE_PAGE_SIZE_NAME "file_space_page_size"  /* File space page size */
 
 
 
 /* ========= File Access properties ============ */
-#define H5F_ACS_META_CACHE_INIT_CONFIG_NAME	"mdc_initCacheCfg" /* Initial metadata cache resize configuration */
+#define H5F_ACS_META_CACHE_INIT_CONFIG_NAME    "mdc_initCacheCfg" /* Initial metadata cache resize configuration */
 #define H5F_ACS_DATA_CACHE_NUM_SLOTS_NAME       "rdcc_nslots"   /* Size of raw data chunk cache(slots) */
 #define H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME       "rdcc_nbytes"   /* Size of raw data chunk cache(bytes) */
 #define H5F_ACS_PREEMPT_READ_CHUNKS_NAME        "rdcc_w0"       /* Preemption read chunks first */
@@ -477,19 +478,24 @@
 #define H5F_ACS_SIEVE_BUF_SIZE_NAME             "sieve_buf_size" /* Maximum sieve buffer size (when data sieving is allowed by file driver) */
 #define H5F_ACS_SDATA_BLOCK_SIZE_NAME           "sdata_block_size" /* Minimum "small data" allocation block size (when aggregating "small" raw data allocations) */
 #define H5F_ACS_GARBG_COLCT_REF_NAME            "gc_ref"        /* Garbage-collect references */
-#define H5F_ACS_FILE_DRV_NAME                   "driver-id/info" /* File driver ID & info */
-#define H5F_ACS_CLOSE_DEGREE_NAME		"close_degree"  /* File close degree */
+#define H5F_ACS_FILE_DRV_NAME                   "vfd_info" /* File driver ID & info */
+#define H5F_ACS_CLOSE_DEGREE_NAME               "close_degree"  /* File close degree */
 #define H5F_ACS_FAMILY_OFFSET_NAME              "family_offset" /* Offset position in file for family file driver */
 #define H5F_ACS_FAMILY_NEWSIZE_NAME             "family_newsize" /* New member size of family driver.  (private property only used by h5repart) */
 #define H5F_ACS_FAMILY_TO_SEC2_NAME             "family_to_sec2" /* Whether to convert family to sec2 driver.  (private property only used by h5repart) */
 #define H5F_ACS_MULTI_TYPE_NAME                 "multi_type"    /* Data type in multi file driver */
-#define H5F_ACS_LATEST_FORMAT_NAME              "latest_format" /* 'Use latest format version' flag */
+#define H5F_ACS_LIBVER_LOW_BOUND_NAME           "libver_low_bound"     /* 'low' bound of library format versions */
+#define H5F_ACS_LIBVER_HIGH_BOUND_NAME          "libver_high_bound"    /* 'high' bound of library format versions */
 #define H5F_ACS_WANT_POSIX_FD_NAME              "want_posix_fd" /* Internal: query the file descriptor from the core VFD, instead of the memory address */
 #define H5F_ACS_METADATA_READ_ATTEMPTS_NAME     "metadata_read_attempts" /* # of metadata read attempts */
-#define H5F_ACS_OBJECT_FLUSH_CB_NAME     	"object_flush_cb" 	 /* Object flush callback */
+#define H5F_ACS_OBJECT_FLUSH_CB_NAME            "object_flush_cb"      /* Object flush callback */
 #define H5F_ACS_EFC_SIZE_NAME                   "efc_size"      /* Size of external file cache */
 #define H5F_ACS_FILE_IMAGE_INFO_NAME            "file_image_info" /* struct containing initial file image and callback info */
 #define H5F_ACS_CLEAR_STATUS_FLAGS_NAME         "clear_status_flags" /* Whether to clear superblock status_flags (private property only used by h5clear) */
+#define H5F_ACS_NULL_FSM_ADDR_NAME              "null_fsm_addr"   /* Nullify addresses of free-space managers */
+                                                                  /* Private property used only by h5clear */
+#define H5F_ACS_SKIP_EOF_CHECK_NAME             "skip_eof_check"  /* Skip EOF check */
+                                                                  /* Private property used only by h5clear */
 #define H5F_ACS_USE_MDC_LOGGING_NAME            "use_mdc_logging" /* Whether to use metadata cache logging */
 #define H5F_ACS_MDC_LOG_LOCATION_NAME           "mdc_log_location" /* Name of metadata cache log location */
 #define H5F_ACS_START_MDC_LOG_ON_ACCESS_NAME    "start_mdc_log_on_access" /* Whether logging starts on file create/open */
@@ -503,7 +509,7 @@
 #define H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_NAME   "page_buffer_min_raw_perc" /* the min raw data percentage for the page buffer cache */
 
 /* ======================== File Mount properties ====================*/
-#define H5F_MNT_SYM_LOCAL_NAME 		"local"                 /* Whether absolute symlinks local to file. */
+#define H5F_MNT_SYM_LOCAL_NAME         "local"                 /* Whether absolute symlinks local to file. */
 
 
 #ifdef H5_HAVE_PARALLEL
@@ -512,20 +518,20 @@
 #endif /* H5_HAVE_PARALLEL */
 
 /* Define the HDF5 file signature */
-#define H5F_SIGNATURE	  "\211HDF\r\n\032\n"
+#define H5F_SIGNATURE      "\211HDF\r\n\032\n"
 #define H5F_SIGNATURE_LEN 8
 
 /* Version #'s of the major components of the file format */
-#define HDF5_SUPERBLOCK_VERSION_DEF	0	/* The default super block format	  */
-#define HDF5_SUPERBLOCK_VERSION_1	1	/* Version with non-default B-tree 'K' value */
-#define HDF5_SUPERBLOCK_VERSION_2	2	/* Revised version with superblock extension and checksum */
-#define HDF5_SUPERBLOCK_VERSION_3	3	/* With file locking and consistency flags (at least this version for SWMR support) */
-#define HDF5_SUPERBLOCK_VERSION_LATEST	HDF5_SUPERBLOCK_VERSION_3	/* The maximum super block format    */
+#define HDF5_SUPERBLOCK_VERSION_DEF    0    /* The default super block format      */
+#define HDF5_SUPERBLOCK_VERSION_1    1    /* Version with non-default B-tree 'K' value */
+#define HDF5_SUPERBLOCK_VERSION_2    2    /* Revised version with superblock extension and checksum */
+#define HDF5_SUPERBLOCK_VERSION_3    3    /* With file locking and consistency flags (at least this version for SWMR support) */
+#define HDF5_SUPERBLOCK_VERSION_LATEST    HDF5_SUPERBLOCK_VERSION_3    /* The maximum super block format    */
 #define HDF5_SUPERBLOCK_VERSION_V18_LATEST HDF5_SUPERBLOCK_VERSION_2    /* The latest superblock version for v18 */
-#define HDF5_FREESPACE_VERSION	        0	/* of the Free-Space Info	  */
-#define HDF5_OBJECTDIR_VERSION	        0	/* of the Object Directory format */
-#define HDF5_SHAREDHEADER_VERSION       0	/* of the Shared-Header Info	  */
-#define HDF5_DRIVERINFO_VERSION_0       0	/* of the Driver Information Block*/
+#define HDF5_FREESPACE_VERSION            0    /* of the Free-Space Info      */
+#define HDF5_OBJECTDIR_VERSION            0    /* of the Object Directory format */
+#define HDF5_SHAREDHEADER_VERSION       0    /* of the Shared-Header Info      */
+#define HDF5_DRIVERINFO_VERSION_0       0    /* of the Driver Information Block*/
 
 /* B-tree internal 'K' values */
 #define HDF5_BTREE_SNODE_IK_DEF         16
@@ -535,55 +541,57 @@
                                                     if it is changed, the code
                                                     must compensate. -QAK
                                                  */
-#define HDF5_BTREE_IK_MAX_ENTRIES       65536 	/* 2^16 - 2 bytes for storing entries (children) */
-						/* See format specification on version 1 B-trees */
+#define HDF5_BTREE_IK_MAX_ENTRIES       65536     /* 2^16 - 2 bytes for storing entries (children) */
+                        /* See format specification on version 1 B-trees */
 
 /* Default file space handling strategy */
-#define H5F_FILE_SPACE_STRATEGY_DEF	        H5F_FSPACE_STRATEGY_FSM_AGGR
+#define H5F_FILE_SPACE_STRATEGY_DEF            H5F_FSPACE_STRATEGY_FSM_AGGR
 
 /* Default free space section threshold used by free-space managers */
-#define H5F_FREE_SPACE_PERSIST_DEF	        FALSE
+#define H5F_FREE_SPACE_PERSIST_DEF            FALSE
 
 /* Default free space section threshold used by free-space managers */
-#define H5F_FREE_SPACE_THRESHOLD_DEF	        1
+#define H5F_FREE_SPACE_THRESHOLD_DEF            1
 
 /* For paged aggregation: default file space page size when not set */
-#define H5F_FILE_SPACE_PAGE_SIZE_DEF     	4096    
+#define H5F_FILE_SPACE_PAGE_SIZE_DEF         4096
 /* For paged aggregation: minimum value for file space page size */
-#define H5F_FILE_SPACE_PAGE_SIZE_MIN     	512
+#define H5F_FILE_SPACE_PAGE_SIZE_MIN         512
+/* For paged aggregation: maxiumum value for file space page size: 1 gigabyte */
+#define H5F_FILE_SPACE_PAGE_SIZE_MAX         1024*1024*1024
 
 /* For paged aggregation: drop free-space with size <= this threshold for small meta section */
-#define H5F_FILE_SPACE_PGEND_META_THRES  10    
+#define H5F_FILE_SPACE_PGEND_META_THRES  0
 
 /* Default for threshold for alignment (can be set via H5Pset_alignment()) */
-#define H5F_ALIGN_DEF			1
+#define H5F_ALIGN_DEF            1
 /* Default for alignment (can be set via H5Pset_alignment()) */
-#define H5F_ALIGN_THRHD_DEF		1
+#define H5F_ALIGN_THRHD_DEF        1
 /* Default size for meta data aggregation block (can be set via H5Pset_meta_block_size()) */
-#define H5F_META_BLOCK_SIZE_DEF		2048
+#define H5F_META_BLOCK_SIZE_DEF        2048
 /* Default size for small data aggregation block (can be set via H5Pset_small_data_block_size()) */
-#define H5F_SDATA_BLOCK_SIZE_DEF	2048
+#define H5F_SDATA_BLOCK_SIZE_DEF    2048
 
 /* Check for file using paged aggregation */
 #define H5F_PAGED_AGGR(F) (F->shared->fs_strategy == H5F_FSPACE_STRATEGY_PAGE && F->shared->fs_page_size)
 
 /* Metadata read attempt values */
-#define H5F_METADATA_READ_ATTEMPTS		1	/* Default # of read attempts for non-SWMR access */
-#define H5F_SWMR_METADATA_READ_ATTEMPTS		100	/* Default # of read attempts for SWMR access */
+#define H5F_METADATA_READ_ATTEMPTS        1    /* Default # of read attempts for non-SWMR access */
+#define H5F_SWMR_METADATA_READ_ATTEMPTS        100    /* Default # of read attempts for SWMR access */
 
 
 /* Macros to define signatures of all objects in the file */
 
 /* Size of signature information (on disk) */
 /* (all on-disk signatures should be this length) */
-#define H5_SIZEOF_MAGIC                 4
+#define H5_SIZEOF_MAGIC                   4
 
 /* Size of checksum information (on disk) */
 /* (all on-disk checksums should be this length) */
-#define H5_SIZEOF_CHKSUM              	4
+#define H5_SIZEOF_CHKSUM                  4
 
 /* v1 B-tree node signature */
-#define H5B_MAGIC	                "TREE"
+#define H5B_MAGIC                       "TREE"
 
 /* v2 B-tree signatures */
 #define H5B2_HDR_MAGIC                  "BTHD"          /* Header */
@@ -613,7 +621,7 @@
 #define H5HF_DBLOCK_MAGIC               "FHDB"          /* Direct block */
 
 /* Global heap signature */
-#define H5HG_MAGIC	                "GCOL"
+#define H5HG_MAGIC                      "GCOL"
 
 /* Local heap signature */
 #define H5HL_MAGIC                      "HEAP"
@@ -626,23 +634,6 @@
 #define H5SM_TABLE_MAGIC                "SMTB"          /* Shared Message Table */
 #define H5SM_LIST_MAGIC                 "SMLI"          /* Shared Message List */
 
-
-/* Latest format will activate the following latest version support */
-/* "latest_flags" in H5F_file_t */
-#define H5F_LATEST_DATATYPE             0x0001
-#define H5F_LATEST_DATASPACE            0x0002
-#define H5F_LATEST_ATTRIBUTE            0x0004
-#define H5F_LATEST_FILL_MSG             0x0008
-#define H5F_LATEST_PLINE_MSG            0x0010
-#define H5F_LATEST_LAYOUT_MSG           0x0020
-#define H5F_LATEST_NO_MOD_TIME_MSG      0x0040
-#define H5F_LATEST_STYLE_GROUP          0x0080
-#define H5F_LATEST_OBJ_HEADER           0x0100
-#define H5F_LATEST_SUPERBLOCK           0x0200
-#define H5F_LATEST_ALL_FLAGS            (H5F_LATEST_DATATYPE | H5F_LATEST_DATASPACE | H5F_LATEST_ATTRIBUTE | H5F_LATEST_FILL_MSG | H5F_LATEST_PLINE_MSG | H5F_LATEST_LAYOUT_MSG | H5F_LATEST_NO_MOD_TIME_MSG | H5F_LATEST_STYLE_GROUP | H5F_LATEST_OBJ_HEADER | H5F_LATEST_SUPERBLOCK)
-
-#define H5F_LATEST_DSET_MSG_FLAGS    (H5F_LATEST_FILL_MSG | H5F_LATEST_PLINE_MSG | H5F_LATEST_LAYOUT_MSG)
-
 /****************************/
 /* Library Private Typedefs */
 /****************************/
@@ -652,12 +643,12 @@ struct H5B_class_t;
 struct H5UC_t;
 struct H5O_loc_t;
 struct H5HG_heap_t;
+struct H5VL_class_t;
 struct H5P_genplist_t;
 
 /* Forward declarations for anonymous H5F objects */
 
 /* Main file structures */
-typedef struct H5F_t H5F_t;
 typedef struct H5F_file_t H5F_file_t;
 
 /* Block aggregation structure */
@@ -669,20 +660,6 @@ typedef struct H5F_object_flush_t {
     void *udata;                /* User data */
 } H5F_object_flush_t;
 
-/* I/O Info for an operation (old) */
-typedef struct H5F_io_info_t {
-    const H5F_t *f;                     /* File object */
-    const struct H5P_genplist_t *dxpl;         /* DXPL object */
-} H5F_io_info_t;
-
-/* I/O Info for an operation */
-/* (Migrate toward this one, so that both raw data & metadata DXPLs are available) */
-typedef struct H5F_io_info2_t {
-    const H5F_t *f;                             /* File object */
-    const struct H5P_genplist_t *meta_dxpl;     /* Metadata DXPL object */
-    const struct H5P_genplist_t *raw_dxpl;      /* Raw data DXPL object */
-} H5F_io_info2_t;
-
 /* Concise info about a block of bytes in a file */
 typedef struct H5F_block_t {
     haddr_t offset;             /* Offset of the block in the file */
@@ -701,11 +678,11 @@ typedef enum H5F_fs_state_t {
 typedef enum H5F_mem_page_t {
     H5F_MEM_PAGE_DEFAULT = 0,       /* Not used */
     H5F_MEM_PAGE_SUPER = 1,
-    H5F_MEM_PAGE_BTREE = 2,          
-    H5F_MEM_PAGE_DRAW = 3, 
-    H5F_MEM_PAGE_GHEAP = 4,      
-    H5F_MEM_PAGE_LHEAP = 5,      
-    H5F_MEM_PAGE_OHDR = 6,      
+    H5F_MEM_PAGE_BTREE = 2,
+    H5F_MEM_PAGE_DRAW = 3,
+    H5F_MEM_PAGE_GHEAP = 4,
+    H5F_MEM_PAGE_LHEAP = 5,
+    H5F_MEM_PAGE_OHDR = 6,
     H5F_MEM_PAGE_LARGE_SUPER = 7,
     H5F_MEM_PAGE_LARGE_BTREE = 8,
     H5F_MEM_PAGE_LARGE_DRAW = 9,
@@ -715,9 +692,17 @@ typedef enum H5F_mem_page_t {
     H5F_MEM_PAGE_NTYPES = 13       /* Sentinel value - must be last */
 } H5F_mem_page_t;
 
+/* Aliases for H5F_mem_page_t enum values */
 #define H5F_MEM_PAGE_META       H5F_MEM_PAGE_SUPER          /* Small-sized meta data */
 #define H5F_MEM_PAGE_GENERIC    H5F_MEM_PAGE_LARGE_SUPER    /* Large-sized generic: meta and raw */
 
+/* Type of prefix for opening prefixed files */
+typedef enum H5F_prefix_open_t {
+    H5F_PREFIX_VDS,             /* Virtual dataset prefix */
+    H5F_PREFIX_ELINK            /* External link prefix */
+} H5F_prefix_open_t;
+
+
 /*****************************/
 /* Library-private Variables */
 /*****************************/
@@ -727,13 +712,15 @@ typedef enum H5F_mem_page_t {
 /* Library-private Function Prototypes */
 /***************************************/
 
-
 /* Private functions */
 H5_DLL H5F_t *H5F_open(const char *name, unsigned flags, hid_t fcpl_id,
-    hid_t fapl_id, hid_t dxpl_id);
+    hid_t fapl_id);
 H5_DLL herr_t H5F_try_close(H5F_t *f, hbool_t *was_closed/*out*/);
+H5_DLL herr_t H5F_start_swmr_write(H5F_t *file);
 
-/* Functions than retrieve values from the file struct */
+/* Functions that retrieve values from the file struct */
+H5_DLL H5F_libver_t H5F_get_low_bound(const H5F_t *f);
+H5_DLL H5F_libver_t H5F_get_high_bound(const H5F_t *f);
 H5_DLL unsigned H5F_get_intent(const H5F_t *f);
 H5_DLL char *H5F_get_open_name(const H5F_t *f);
 H5_DLL char *H5F_get_actual_name(const H5F_t *f);
@@ -754,7 +741,7 @@ H5_DLL herr_t H5F_get_obj_ids(const H5F_t *f, unsigned types, size_t max_objs, h
 H5_DLL hsize_t H5F_get_pgend_meta_thres(const H5F_t *f);
 H5_DLL hbool_t H5F_get_point_of_no_return(const H5F_t *f);
 H5_DLL hbool_t H5F_get_first_alloc_dealloc(const H5F_t *f);
-H5_DLL hbool_t H5F_get_eoa_pre_fsm_fsalloc(const H5F_t *f);
+H5_DLL haddr_t H5F_get_eoa_pre_fsm_fsalloc(const H5F_t *f);
 
 /* Functions than retrieve values set/cached from the superblock/FCPL */
 H5_DLL haddr_t H5F_get_base_addr(const H5F_t *f);
@@ -784,7 +771,6 @@ H5_DLL struct H5UC_t *H5F_grp_btree_shared(const H5F_t *f);
 H5_DLL herr_t H5F_set_grp_btree_shared(H5F_t *f, struct H5UC_t *rc);
 H5_DLL hbool_t H5F_use_tmp_space(const H5F_t *f);
 H5_DLL hbool_t H5F_is_tmp_addr(const H5F_t *f, haddr_t addr);
-H5_DLL herr_t H5F_set_latest_flags(H5F_t *f, unsigned flags);
 H5_DLL hsize_t H5F_get_alignment(const H5F_t *f);
 H5_DLL hsize_t H5F_get_threshold(const H5F_t *f);
 #ifdef H5_HAVE_PARALLEL
@@ -806,17 +792,17 @@ H5_DLL herr_t H5F_get_vfd_handle(const H5F_t *file, hid_t fapl, void **file_hand
 H5_DLL hbool_t H5F_is_mount(const H5F_t *file);
 H5_DLL hbool_t H5F_has_mount(const H5F_t *file);
 H5_DLL herr_t H5F_traverse_mount(struct H5O_loc_t *oloc/*in,out*/);
-H5_DLL herr_t H5F_flush_mounts(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id);
+H5_DLL herr_t H5F_flush_mounts(H5F_t *f);
 
 /* Functions that operate on blocks of bytes wrt super block */
-H5_DLL herr_t H5F_block_read(const H5F_t *f, H5FD_mem_t type, haddr_t addr,
-                size_t size, hid_t dxpl_id, void *buf/*out*/);
-H5_DLL herr_t H5F_block_write(const H5F_t *f, H5FD_mem_t type, haddr_t addr,
-                size_t size, hid_t dxpl_id, const void *buf);
+H5_DLL herr_t H5F_block_read(H5F_t *f, H5FD_mem_t type, haddr_t addr,
+    size_t size, void *buf/*out*/);
+H5_DLL herr_t H5F_block_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
+    size_t size, const void *buf);
 
 /* Functions that flush or evict */
-H5_DLL herr_t H5F_flush_tagged_metadata(H5F_t * f, haddr_t tag, hid_t dxpl_id);
-H5_DLL herr_t H5F_evict_tagged_metadata(H5F_t * f, haddr_t tag, hid_t dxpl_id);
+H5_DLL herr_t H5F_flush_tagged_metadata(H5F_t *f, haddr_t tag);
+H5_DLL herr_t H5F_evict_tagged_metadata(H5F_t * f, haddr_t tag);
 
 /* Functions that verify a piece of metadata with checksum */
 H5_DLL herr_t H5F_get_checksums(const uint8_t *buf, size_t chk_size, uint32_t *s_chksum, uint32_t *c_chksum);
@@ -843,7 +829,7 @@ H5_DLL herr_t H5F_fake_free(H5F_t *f);
 
 /* Superblock related routines */
 H5_DLL herr_t H5F_super_dirty(H5F_t *f);
-H5_DLL herr_t H5F_eoa_dirty(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5F_eoa_dirty(H5F_t *f);
 
 /* Parallel I/O (i.e. MPI) related routines */
 #ifdef H5_HAVE_PARALLEL
@@ -856,13 +842,15 @@ H5_DLL herr_t H5F_get_mpi_info(const H5F_t *f, MPI_Info **f_info);
 #endif /* H5_HAVE_PARALLEL */
 
 /* External file cache routines */
-H5_DLL H5F_t *H5F_efc_open(H5F_t *parent, const char *name, unsigned flags,
-    hid_t fcpl_id, hid_t fapl_id, hid_t dxpl_id);
 H5_DLL herr_t H5F_efc_close(H5F_t *parent, H5F_t *file);
 
+/* File prefix routines */
+H5_DLL H5F_t *H5F_prefix_open_file(H5F_t *primary_file, H5F_prefix_open_t prefix_type,
+    const char *prop_prefix, const char *file_name, unsigned file_intent, hid_t fapl_id);
+
 /* Global heap CWFS routines */
 H5_DLL herr_t H5F_cwfs_add(H5F_t *f, struct H5HG_heap_t *heap);
-H5_DLL herr_t H5F_cwfs_find_free_heap(H5F_t *f, hid_t dxpl_id, size_t need, haddr_t *addr);
+H5_DLL herr_t H5F_cwfs_find_free_heap(H5F_t *f, size_t need, haddr_t *addr);
 H5_DLL herr_t H5F_cwfs_advance_heap(H5F_t *f, struct H5HG_heap_t *heap,
     hbool_t add_heap);
 H5_DLL herr_t H5F_cwfs_remove_heap(H5F_file_t *shared, struct H5HG_heap_t *heap);
diff --git a/src/H5Fpublic.h b/src/H5Fpublic.h
index 84c0d38..73c59f5 100644
--- a/src/H5Fpublic.h
+++ b/src/H5Fpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -175,12 +173,17 @@ typedef struct H5F_sect_info_t {
     hsize_t             size;   /* Size of free space section */
 } H5F_sect_info_t;
 
-/* Library's file format versions */
+/* Library's format versions */
 typedef enum H5F_libver_t {
-    H5F_LIBVER_EARLIEST,        /* Use the earliest possible format for storing objects */
-    H5F_LIBVER_LATEST           /* Use the latest possible format available for storing objects*/
+    H5F_LIBVER_ERROR = -1,
+    H5F_LIBVER_EARLIEST = 0,    /* Use the earliest possible format for storing objects */
+    H5F_LIBVER_V18 = 1,         /* Use the latest v18 format for storing objects */
+    H5F_LIBVER_V110 = 2,        /* Use the latest v10 format for storing objects */
+    H5F_LIBVER_NBOUNDS
 } H5F_libver_t;
 
+#define H5F_LIBVER_LATEST   H5F_LIBVER_V110
+
 /* File space handling strategy */
 typedef enum H5F_fspace_strategy_t {
     H5F_FSPACE_STRATEGY_FSM_AGGR = 0,   /* Mechanisms: free-space managers, aggregators, and virtual file drivers */
@@ -238,6 +241,8 @@ H5_DLL herr_t H5Fmount(hid_t loc, const char *name, hid_t child, hid_t plist);
 H5_DLL herr_t H5Funmount(hid_t loc, const char *name);
 H5_DLL hssize_t H5Fget_freespace(hid_t file_id);
 H5_DLL herr_t H5Fget_filesize(hid_t file_id, hsize_t *size);
+H5_DLL herr_t H5Fget_eoa(hid_t file_id, haddr_t *eoa);
+H5_DLL herr_t H5Fincrement_filesize(hid_t file_id, hsize_t increment);
 H5_DLL ssize_t H5Fget_file_image(hid_t file_id, void * buf_ptr, size_t buf_len);
 H5_DLL herr_t H5Fget_mdc_config(hid_t file_id,
 				H5AC_cache_config_t * config_ptr);
@@ -257,7 +262,7 @@ H5_DLL herr_t H5Fstart_swmr_write(hid_t file_id);
 H5_DLL ssize_t H5Fget_free_sections(hid_t file_id, H5F_mem_t type,
     size_t nsects, H5F_sect_info_t *sect_info/*out*/);
 H5_DLL herr_t H5Fclear_elink_file_cache(hid_t file_id);
-H5_DLL herr_t H5Fset_latest_format(hid_t file_id, hbool_t latest_format);
+H5_DLL herr_t H5Fset_libver_bounds(hid_t file_id, H5F_libver_t low, H5F_libver_t high);
 H5_DLL herr_t H5Fstart_mdc_logging(hid_t file_id);
 H5_DLL herr_t H5Fstop_mdc_logging(hid_t file_id);
 H5_DLL herr_t H5Fget_mdc_logging_status(hid_t file_id,
@@ -297,6 +302,7 @@ typedef struct H5F_info1_t {
 
 /* Function prototypes */
 H5_DLL herr_t H5Fget_info1(hid_t obj_id, H5F_info1_t *finfo);
+H5_DLL herr_t H5Fset_latest_format(hid_t file_id, hbool_t latest_format);
 
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
diff --git a/src/H5Fquery.c b/src/H5Fquery.c
index 34fe8f9..be24072 100644
--- a/src/H5Fquery.c
+++ b/src/H5Fquery.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -28,16 +26,16 @@
 /* Module Setup */
 /****************/
 
-#include "H5Fmodule.h"          /* This source code file is part of the H5F module */
+#include "H5Fmodule.h"        /* This source code file is part of the H5F module */
 
 
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fpkg.h"             /* File access				*/
-#include "H5FDprivate.h"	/* File drivers				*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Fpkg.h"             /* File access                              */
+#include "H5FDprivate.h"        /* File drivers                             */
 
 
 /****************/
@@ -77,17 +75,13 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_intent
+ * Function: H5F_get_intent
  *
- * Purpose:	Quick and dirty routine to retrieve the file's 'intent' flags
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	'intent' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		September 29, 2000
+ * Purpose:  Quick and dirty routine to retrieve the file's 'intent' flags
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   'intent' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -103,16 +97,62 @@ H5F_get_intent(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_open_name
+ * Function:    H5F_get_low_bound
+ *
+ * Purpose: Quick and dirty routine to retrieve the file's low_bound.
+ *          (Mainly added to stop non-file routines from poking about in the
+ *          H5F_t data structure)
+ *
+ * Return:  low_bound on success/abort on failure (shouldn't fail)
+ *
+ * Programmer:  Vailin Choi; June 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+H5F_libver_t
+H5F_get_low_bound(const H5F_t *f)
+{
+    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(f);
+
+    FUNC_LEAVE_NOAPI(f->shared->low_bound)
+} /* end H5F_get_low_bound() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5F_get_high_bound
+ *
+ * Purpose: Quick and dirty routine to retrieve the file's high_bound.
+ *          (Mainly added to stop non-file routines from poking about in the
+ *          H5F_t data structure)
+ *
+ * Return:  high_bound on success/abort on failure (shouldn't fail)
  *
- * Purpose:	Retrieve the name used to open a file.
+ * Programmer:  Vailin Choi; June 2016
  *
- * Return:	Success:	The name of the file.
- * 		Failure:	? (should not happen)
+ *-------------------------------------------------------------------------
+ */
+H5F_libver_t
+H5F_get_high_bound(const H5F_t *f)
+{
+    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(f);
+
+    FUNC_LEAVE_NOAPI(f->shared->high_bound)
+} /* end H5F_get_high_bound() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5F_get_open_name
  *
- * Programmer:	Neil Fortner
- *		December 15 2008
+ * Purpose:  Retrieve the name used to open a file.
  *
+ * Return:   Success:    The name of the file.
+ *           Failure:    ? (should not happen)
  *-------------------------------------------------------------------------
  */
 char *
@@ -129,16 +169,12 @@ H5F_get_open_name(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_actual_name
+ * Function: H5F_get_actual_name
  *
- * Purpose:	Retrieve the actual name of a file, after resolving symlinks, etc.
- *
- * Return:	Success:	The name of the file.
- * 		Failure:	? (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		November 25 2009
+ * Purpose:  Retrieve the actual name of a file, after resolving symlinks, etc.
  *
+ * Return:   Success:    The name of the file.
+ *           Failure:    ? (should not happen)
  *-------------------------------------------------------------------------
  */
 char *
@@ -155,16 +191,13 @@ H5F_get_actual_name(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_extpath
- *
- * Purpose:	Retrieve the file's 'extpath' flags
- *		This is used by H5L_extern_traverse() and H5D_build_extfile_prefix() to retrieve the main file's location
- *		when searching the target file.
+ * Function: H5F_get_extpath
  *
- * Return:	'extpath' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Vailin Choi, April 2, 2008
+ * Purpose:  Retrieve the file's 'extpath' flags
+ *           This is used by H5L_extern_traverse() and H5D_build_file_prefix() to retrieve the main file's location
+ *           when searching the target file.
  *
+ * Return:   'extpath' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 char *
@@ -181,14 +214,11 @@ H5F_get_extpath(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_shared
- *
- * Purpose:	Retrieve the file's 'shared' pointer
- *
- * Return:	'shared' on success/abort on failure (shouldn't fail)
+ * Function: H5F_get_shared
  *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'shared' pointer
  *
+ * Return:   'shared' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 H5F_file_t *
@@ -204,14 +234,11 @@ H5F_get_shared(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_same_shared
- *
- * Purpose:	Determine if two files have the same shared file pointer
- *
- * Return:	TRUE/FALSE on success/abort on failure (shouldn't fail)
+ * Function: H5F_same_shared
  *
- * Programmer:	Quincey Koziol, July 19, 2011
+ * Purpose:  Determine if two files have the same shared file pointer
  *
+ * Return:   TRUE/FALSE on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -230,14 +257,11 @@ H5F_same_shared(const H5F_t *f1, const H5F_t *f2)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_nopen_objs
+ * Function: H5F_get_nopen_objs
  *
- * Purpose:	Retrieve the file's 'nopen_objs' value
- *
- * Return:	'nopen_objs' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'nopen_objs' value
  *
+ * Return:   'nopen_objs' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -253,14 +277,11 @@ H5F_get_nopen_objs(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_file_id
- *
- * Purpose:	Retrieve the file's 'file_id' value
+ * Function: H5F_get_file_id
  *
- * Return:	'file_id' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'file_id' value
  *
+ * Return:   'file_id' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -276,14 +297,11 @@ H5F_get_file_id(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_parent
- *
- * Purpose:	Retrieve the file's 'parent' pointer
- *
- * Return:	'parent' on success/abort on failure (shouldn't fail)
+ * Function: H5F_get_parent
  *
- * Programmer:	Quincey Koziol, July 19, 2011
+ * Purpose:  Retrieve the file's 'parent' pointer
  *
+ * Return:   'parent' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 H5F_t *
@@ -299,14 +317,11 @@ H5F_get_parent(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_nmounts
+ * Function: H5F_get_nmounts
  *
- * Purpose:	Retrieve the file's 'nmounts' value
- *
- * Return:	'nmounts' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'nmounts' value
  *
+ * Return:   'nmounts' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -322,14 +337,11 @@ H5F_get_nmounts(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_read_attempts
- *
- * Purpose:	Retrieve the file's 'read_attempts' value
+ * Function: H5F_get_read_attempts
  *
- * Return:	'# of read attempts' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Vaili Choi; Sept 2013
+ * Purpose:  Retrieve the file's 'read_attempts' value
  *
+ * Return:   '# of read attempts' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -345,18 +357,12 @@ H5F_get_read_attempts(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_fcpl
- *
- * Purpose:	Retrieve the value of a file's FCPL.
+ * Function: H5F_get_fcpl
  *
- * Return:	Success:	The FCPL for the file.
- *
- * 		Failure:	? (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		May 25 2005
+ * Purpose:  Retrieve the value of a file's FCPL.
  *
+ * Return:   Success:    The FCPL for the file.
+ *           Failure:    ? (should not happen)
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -373,17 +379,13 @@ H5F_get_fcpl(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_sizeof_addr
- *
- * Purpose:	Quick and dirty routine to retrieve the size of the file's size_t
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	'sizeof_addr' on success/abort on failure (shouldn't fail)
+ * Function: H5F_sizeof_addr
  *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		September 29, 2000
+ * Purpose:  Quick and dirty routine to retrieve the size of the file's size_t
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   'sizeof_addr' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 uint8_t
@@ -400,17 +402,13 @@ H5F_sizeof_addr(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_sizeof_size
+ * Function: H5F_sizeof_size
  *
- * Purpose:	Quick and dirty routine to retrieve the size of the file's off_t
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	'sizeof_size' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		September 29, 2000
+ * Purpose:  Quick and dirty routine to retrieve the size of the file's off_t
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   'sizeof_size' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 uint8_t
@@ -427,14 +425,11 @@ H5F_sizeof_size(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_sohm_addr
- *
- * Purpose:	Retrieve the file's 'sohm_addr' value
+ * Function: H5F_get_sohm_addr
  *
- * Return:	'sohm_addr' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'sohm_addr' value
  *
+ * Return:   'sohm_addr' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -451,14 +446,11 @@ H5F_get_sohm_addr(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_sohm_vers
- *
- * Purpose:	Retrieve the file's 'sohm_vers' value
- *
- * Return:	'sohm_vers' on success/abort on failure (shouldn't fail)
+ * Function: H5F_get_sohm_vers
  *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'sohm_vers' value
  *
+ * Return:   'sohm_vers' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -475,14 +467,11 @@ H5F_get_sohm_vers(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_sohm_nindexes
+ * Function: H5F_get_sohm_nindexes
  *
- * Purpose:	Retrieve the file's 'sohm_nindexes' value
- *
- * Return:	'sohm_nindexes' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'sohm_nindexes' value
  *
+ * Return:   'sohm_nindexes' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -499,21 +488,15 @@ H5F_get_sohm_nindexes(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_sym_leaf_k
+ * Function: H5F_sym_leaf_k
  *
- * Purpose:	Replaced a macro to retrieve the symbol table leaf size,
- *              now that the generic properties are being used to store
- *              the values.
+ * Purpose:  Replaced a macro to retrieve the symbol table leaf size,
+ *           now that the generic properties are being used to store
+ *           the values.
  *
- * Return:	Success:	Non-negative, and the symbol table leaf size is
+ * Return:   Success:    Non-negative, and the symbol table leaf size is
  *                              returned.
- *
- * 		Failure:	Negative (should not happen)
- *
- * Programmer:	Raymond Lu
- *		slu@ncsa.uiuc.edu
- *		Oct 14 2001
- *
+ *           Failure:    Negative (should not happen)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -531,21 +514,15 @@ H5F_sym_leaf_k(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_Kvalue
+ * Function: H5F_Kvalue
  *
- * Purpose:	Replaced a macro to retrieve a B-tree key value for a certain
- *              type, now that the generic properties are being used to store
- *              the B-tree values.
+ * Purpose:  Replaced a macro to retrieve a B-tree key value for a certain
+ *           type, now that the generic properties are being used to store
+ *           the B-tree values.
  *
- * Return:	Success:	Non-negative, and the B-tree key value is
+ * Return:   Success:    Non-negative, and the B-tree key value is
  *                              returned.
- *
- * 		Failure:	Negative (should not happen)
- *
- * Programmer:	Raymond Lu
- *		slu@ncsa.uiuc.edu
- *		Oct 14 2001
- *
+ *           Failure:    Negative (should not happen)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -564,14 +541,11 @@ H5F_Kvalue(const H5F_t *f, const H5B_class_t *type)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_nrefs
+ * Function: H5F_get_nrefs
  *
- * Purpose:	Retrieve the file's 'nrefs' value
- *
- * Return:	'nrefs' on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol, July 20, 2011
+ * Purpose:  Retrieve the file's 'nrefs' value
  *
+ * Return:   'nrefs' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 unsigned
@@ -588,21 +562,15 @@ H5F_get_nrefs(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_rdcc_nslots
+ * Function: H5F_rdcc_nslots
  *
- * Purpose:	Replaced a macro to retrieve the raw data cache number of slots,
- *              now that the generic properties are being used to store
- *              the values.
+ * Purpose:  Replaced a macro to retrieve the raw data cache number of slots,
+ *           now that the generic properties are being used to store
+ *           the values.
  *
- * Return:	Success:	Non-negative, and the raw data cache number of
+ * Return:   Success:    Non-negative, and the raw data cache number of
  *                              of slots is returned.
- *
- * 		Failure:	Negative (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jun  1 2004
- *
+ *           Failure:    Negative (should not happen)
  *-------------------------------------------------------------------------
  */
 size_t
@@ -619,21 +587,15 @@ H5F_rdcc_nslots(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_rdcc_nbytes
+ * Function: H5F_rdcc_nbytes
  *
- * Purpose:	Replaced a macro to retrieve the raw data cache number of bytes,
- *              now that the generic properties are being used to store
- *              the values.
+ * Purpose:  Replaced a macro to retrieve the raw data cache number of bytes,
+ *           now that the generic properties are being used to store
+ *           the values.
  *
- * Return:	Success:	Non-negative, and the raw data cache number of
+ * Return:   Success:    Non-negative, and the raw data cache number of
  *                              of bytes is returned.
- *
- * 		Failure:	Negative (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jun  1 2004
- *
+ *           Failure:    Negative (should not happen)
  *-------------------------------------------------------------------------
  */
 size_t
@@ -650,21 +612,15 @@ H5F_rdcc_nbytes(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_rdcc_w0
+ * Function: H5F_rdcc_w0
  *
- * Purpose:	Replaced a macro to retrieve the raw data cache 'w0' value
- *              now that the generic properties are being used to store
- *              the values.
+ * Purpose:  Replaced a macro to retrieve the raw data cache 'w0' value
+ *           now that the generic properties are being used to store
+ *           the values.
  *
- * Return:	Success:	Non-negative, and the raw data cache 'w0' value
+ * Return:   Success:    Non-negative, and the raw data cache 'w0' value
  *                              is returned.
- *
- * 		Failure:	Negative (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jun  2 2004
- *
+ *           Failure:    Negative (should not happen)
  *-------------------------------------------------------------------------
  */
 double
@@ -681,17 +637,13 @@ H5F_rdcc_w0(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_base_addr
+ * Function: H5F_get_base_addr
  *
- * Purpose:	Quick and dirty routine to retrieve the file's 'base_addr' value
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Raymond Lu <slu@ncsa.uiuc.edu>
- *		December 20, 2002
+ * Purpose:  Quick and dirty routine to retrieve the file's 'base_addr' value
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 haddr_t
@@ -709,21 +661,15 @@ H5F_get_base_addr(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_grp_btree_shared
+ * Function: H5F_grp_btree_shared
  *
- * Purpose:	Replaced a macro to retrieve the shared B-tree node info
- *              now that the generic properties are being used to store
- *              the values.
+ * Purpose:  Replaced a macro to retrieve the shared B-tree node info
+ *           now that the generic properties are being used to store
+ *           the values.
  *
- * Return:	Success:	Non-void, and the shared B-tree node info
+ * Return:   Success:    Non-void, and the shared B-tree node info
  *                              is returned.
- *
- * 		Failure:	void (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jul  5 2004
- *
+ *           Failure:    void (should not happen)
  *-------------------------------------------------------------------------
  */
 H5UC_t *
@@ -740,21 +686,15 @@ H5F_grp_btree_shared(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_sieve_buf_size
+ * Function: H5F_sieve_buf_size
  *
- * Purpose:	Replaced a macro to retrieve the dataset sieve buffer size
- *              now that the generic properties are being used to store
- *              the values.
+ * Purpose:  Replaced a macro to retrieve the dataset sieve buffer size
+ *           now that the generic properties are being used to store
+ *           the values.
  *
- * Return:	Success:	Non-void, and the dataset sieve buffer size
+ * Return:   Success:    Non-void, and the dataset sieve buffer size
  *                              is returned.
- *
- * 		Failure:	void (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jul  8 2005
- *
+ *           Failure:    void (should not happen)
  *-------------------------------------------------------------------------
  */
 size_t
@@ -771,20 +711,18 @@ H5F_sieve_buf_size(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_gc_ref
- *
- * Purpose:	Replaced a macro to retrieve the "garbage collect
- *              references flag" now that the generic properties are being used
- *              to store the values.
+ * Function: H5F_gc_ref
  *
- * Return:	Success:	The "garbage collect references flag"
- *                              is returned.
+ * Purpose:  Replaced a macro to retrieve the "garbage collect
+ *           references flag" now that the generic properties are being used
+ *           to store the values.
  *
- * 		Failure:	(should not happen)
+ * Return:  Success:    The "garbage collect references flag" is returned.
+ *          Failure:    (should not happen)
  *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jul  8 2005
+ * Programmer:  Quincey Koziol
+ *              koziol@ncsa.uiuc.edu
+ *              Jul  8 2005
  *
  *-------------------------------------------------------------------------
  */
@@ -802,46 +740,12 @@ H5F_gc_ref(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_use_latest_flags
- *
- * Purpose:	Retrieve the 'latest version support' for the file.
- *
- * Return:	Success:	Non-negative, the requested 'version support'
- *
- * 		Failure:	(can't happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Mar  5 2007
- *
- *-------------------------------------------------------------------------
- */
-unsigned
-H5F_use_latest_flags(const H5F_t *f, unsigned fl)
-{
-    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    HDassert(f);
-    HDassert(f->shared);
-
-    FUNC_LEAVE_NOAPI(f->shared->latest_flags & (fl))
-} /* end H5F_use_latest_flags() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5F_get_fc_degree
- *
- * Purpose:	Retrieve the 'file close degree' for the file.
- *
- * Return:	Success:	Non-negative, the 'file close degree'
- *
- * 		Failure:	(can't happen)
+ * Function: H5F_get_fc_degree
  *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Mar  5 2007
+ * Purpose:  Retrieve the 'file close degree' for the file.
  *
+ * Return:   Success:    Non-negative, the 'file close degree'
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 H5F_close_degree_t
@@ -866,10 +770,6 @@ H5F_get_fc_degree(const H5F_t *f)
  * Return:      Success:    Flag indicating whether the evict-on-close
  *                          property was set for the file.
  *              Failure:    (can't happen)
- *
- * Programmer:  Dana Robinson
- *              Spring 2016
- *
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -886,18 +786,12 @@ H5F_get_evict_on_close(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_store_msg_crt_idx
- *
- * Purpose:	Retrieve the 'store message creation index' flag for the file.
+ * Function: H5F_store_msg_crt_idx
  *
- * Return:	Success:	Non-negative, the 'store message creation index' flag
- *
- * 		Failure:	(can't happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Mar  6 2007
+ * Purpose:  Retrieve the 'store message creation index' flag for the file.
  *
+ * Return:   Success:    Non-negative, the 'store message creation index' flag
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -914,17 +808,12 @@ H5F_store_msg_crt_idx(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_has_feature
- *
- * Purpose:	Check if a file has a particular feature enabled
+ * Function: H5F_has_feature
  *
- * Return:	Success:	Non-negative - TRUE or FALSE
- * 		Failure:	Negative (should not happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		May 31 2004
+ * Purpose:  Check if a file has a particular feature enabled
  *
+ * Return:   Success:    Non-negative - TRUE or FALSE
+ *           Failure:    Negative (should not happen)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -941,17 +830,13 @@ H5F_has_feature(const H5F_t *f, unsigned feature)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_driver_id
- *
- * Purpose:	Quick and dirty routine to retrieve the file's 'driver_id' value
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	'driver_id' on success/abort on failure (shouldn't fail)
+ * Function: H5F_get_driver_id
  *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		October 10, 2000
+ * Purpose:  Quick and dirty routine to retrieve the file's 'driver_id' value
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   'driver_id' on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -969,23 +854,19 @@ H5F_get_driver_id(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_fileno
+ * Function: H5F_get_fileno
  *
- * Purpose:	Quick and dirty routine to retrieve the file's 'fileno' value
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		March 27, 2002
+ * Purpose:  Quick and dirty routine to retrieve the file's 'fileno' value
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5F_get_fileno(const H5F_t *f, unsigned long *filenum)
 {
-    herr_t	ret_value = SUCCEED;
+    herr_t    ret_value = SUCCEED;
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -996,7 +877,7 @@ H5F_get_fileno(const H5F_t *f, unsigned long *filenum)
 
     /* Retrieve the file's serial number */
     if(H5FD_get_fileno(f->shared->lf, filenum) < 0)
-	HGOTO_ERROR(H5E_FILE, H5E_BADRANGE, FAIL, "can't retrieve fileno")
+    HGOTO_ERROR(H5E_FILE, H5E_BADRANGE, FAIL, "can't retrieve fileno")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1004,21 +885,17 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_eoa
- *
- * Purpose:	Quick and dirty routine to retrieve the file's 'eoa' value
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5F_get_eoa
  *
- * Programmer:	Quincey Koziol <koziol@ncsa.uiuc.edu>
- *		June 1, 2004
+ * Purpose:  Quick and dirty routine to retrieve the file's 'eoa' value
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 haddr_t
 H5F_get_eoa(const H5F_t *f, H5FD_mem_t type)
 {
-    haddr_t	ret_value = HADDR_UNDEF;        /* Return value */
+    haddr_t    ret_value = HADDR_UNDEF;        /* Return value */
 
     FUNC_ENTER_NOAPI(HADDR_UNDEF)
 
@@ -1027,7 +904,7 @@ H5F_get_eoa(const H5F_t *f, H5FD_mem_t type)
 
     /* Dispatch to driver */
     if(HADDR_UNDEF == (ret_value = H5FD_get_eoa(f->shared->lf, type)))
-	HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "driver get_eoa request failed")
+    HGOTO_ERROR(H5E_VFL, H5E_CANTINIT, HADDR_UNDEF, "driver get_eoa request failed")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1042,10 +919,6 @@ done:
  *
  * Return:      Success:        Non-negative.
  *              Failure:        negative.
- *
- * Programmer:  Raymond Lu
- *              Sep. 16, 2002
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1069,18 +942,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_is_tmp_addr
- *
- * Purpose:	Quick and dirty routine to determine if an address is in
- *		the 'temporary' file space.
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
+ * Function: H5F_is_tmp_addr
  *
- * Return:	TRUE/FALSE on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		June 11, 2009
+ * Purpose:  Quick and dirty routine to determine if an address is in
+ *           the 'temporary' file space.
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   TRUE/FALSE on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -1097,18 +966,14 @@ H5F_is_tmp_addr(const H5F_t *f, haddr_t addr)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_use_tmp_space
- *
- * Purpose:	Quick and dirty routine to determine if using temporary
- *		file space is allowed for this file.
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	TRUE/FALSE on success/abort on failure (shouldn't fail)
+ * Function: H5F_use_tmp_space
  *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		July  1, 2009
+ * Purpose:  Quick and dirty routine to determine if using temporary
+ *           file space is allowed for this file.
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   TRUE/FALSE on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -1126,17 +991,12 @@ H5F_use_tmp_space(const H5F_t *f)
 #ifdef H5_HAVE_PARALLEL
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_coll_md_read
- *
- * Purpose:	Retrieve the 'collective metadata reads' flag for the file.
+ * Function: H5F_coll_md_read
  *
- * Return:	Success:	Non-negative, the 'collective metadata reads' flag
- * 		Failure:	(can't happen)
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Feb 10 2016
+ * Purpose:  Retrieve the 'collective metadata reads' flag for the file.
  *
+ * Return:   Success:    Non-negative, the 'collective metadata reads' flag
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 H5P_coll_md_read_flag_t
@@ -1153,18 +1013,14 @@ H5F_coll_md_read(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_use_mdc_logging
- *
- * Purpose:	Quick and dirty routine to determine if using MDC logging
- *		is enabled for this file.
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	TRUE/FALSE on success/abort on failure (shouldn't fail)
+ * Function: H5F_use_mdc_logging
  *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		June  5, 2016
+ * Purpose:  Quick and dirty routine to determine if using MDC logging
+ *           is enabled for this file.
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   TRUE/FALSE on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -1181,18 +1037,14 @@ H5F_use_mdc_logging(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_start_mdc_log_on_access
+ * Function: H5F_start_mdc_log_on_access
  *
- * Purpose:	Quick and dirty routine to determine if we should start MDC
- *		logging on access for this file.
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	TRUE/FALSE on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		June  5, 2016
+ * Purpose:  Quick and dirty routine to determine if we should start MDC
+ *           logging on access for this file.
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   TRUE/FALSE on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -1209,18 +1061,14 @@ H5F_start_mdc_log_on_access(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_mdc_log_location
+ * Function: H5F_mdc_log_location
  *
- * Purpose:	Quick and dirty routine to retrieve the MDC log location
- *		for this file.
- *          (Mainly added to stop non-file routines from poking about in the
- *          H5F_t data structure)
- *
- * Return:	TRUE/FALSE on success/abort on failure (shouldn't fail)
- *
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		June  5, 2016
+ * Purpose:  Quick and dirty routine to retrieve the MDC log location
+ *           for this file.
+ *           (Mainly added to stop non-file routines from poking about in the
+ *           H5F_t data structure)
  *
+ * Return:   TRUE/FALSE on success/abort on failure (shouldn't fail)
  *-------------------------------------------------------------------------
  */
 char *
@@ -1237,16 +1085,12 @@ H5F_mdc_log_location(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_alignment
- *
- * Purpose:	Retrieve the 'alignment' for the file.
- *
- * Return:	Success:	Non-negative, the 'alignment'
- *
- * 		Failure:	(can't happen)
+ * Function: H5F_get_alignment
  *
- * Programmer:	Vailin Choi; Dec 2012
+ * Purpose:  Retrieve the 'alignment' for the file.
  *
+ * Return:   Success:    Non-negative, the 'alignment'
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 hsize_t
@@ -1263,16 +1107,12 @@ H5F_get_alignment(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_threshold
+ * Function: H5F_get_threshold
  *
- * Purpose:	Retrieve the 'threshold' for alignment in the file.
- *
- * Return:	Success:	Non-negative, the 'threshold'
- *
- * 		Failure:	(can't happen)
- *
- * Programmer:	Vailin Choi; Dec 2012
+ * Purpose:  Retrieve the 'threshold' for alignment in the file.
  *
+ * Return:   Success:    Non-negative, the 'threshold'
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 hsize_t
@@ -1289,16 +1129,12 @@ H5F_get_threshold(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_pgend_meta_thres
- *
- * Purpose:	Retrieve the 'page end meta threshold size' for the file.
- *
- * Return:	Success:	Non-negative, the 'pgend_meta_thres'
- *
- * 		Failure:	(can't happen)
+ * Function: H5F_get_pgend_meta_thres
  *
- * Programmer:	Vailin Choi; Dec 2012
+ * Purpose:  Retrieve the 'page end meta threshold size' for the file.
  *
+ * Return:   Success:    Non-negative, the 'pgend_meta_thres'
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 hsize_t
@@ -1315,13 +1151,12 @@ H5F_get_pgend_meta_thres(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_point_of_no_return
+ * Function: H5F_get_point_of_no_return
  *
- * Purpose:	Retrieve the 'point of no return' value for the file.
- *
- * Return:	Success:	Non-negative, the 'point_of_no_return'
- * 		Failure:	(can't happen)
+ * Purpose:  Retrieve the 'point of no return' value for the file.
  *
+ * Return:   Success:    Non-negative, the 'point_of_no_return'
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -1338,13 +1173,12 @@ H5F_get_point_of_no_return(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_first_alloc_dealloc
- *
- * Purpose:	Retrieve the 'first alloc / dealloc' value for the file.
+ * Function: H5F_get_first_alloc_dealloc
  *
- * Return:	Success:	Non-negative, the 'first_alloc_dealloc'
- * 		Failure:	(can't happen)
+ * Purpose:  Retrieve the 'first alloc / dealloc' value for the file.
  *
+ * Return:   Success:    Non-negative, the 'first_alloc_dealloc'
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -1361,16 +1195,15 @@ H5F_get_first_alloc_dealloc(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5F_get_eoa_pre_fsm_fsalloc
- *
- * Purpose:	Retrieve the 'EOA pre-FSM fsalloc' value for the file.
+ * Function: H5F_get_eoa_pre_fsm_fsalloc
  *
- * Return:	Success:	Non-negative, the 'EOA pre-FSM fsalloc'
- * 		Failure:	(can't happen)
+ * Purpose:  Retrieve the 'EOA pre-FSM fsalloc' value for the file.
  *
+ * Return:   Success:    Non-negative, the 'EOA pre-FSM fsalloc'
+ *           Failure:    (can't happen)
  *-------------------------------------------------------------------------
  */
-hbool_t
+haddr_t
 H5F_get_eoa_pre_fsm_fsalloc(const H5F_t *f)
 {
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
diff --git a/src/H5Fsfile.c b/src/H5Fsfile.c
index 4fb9cd9..e0c830b 100644
--- a/src/H5Fsfile.c
+++ b/src/H5Fsfile.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Fmodule.h"          /* This source code file is part of the H5F module */
diff --git a/src/H5Fspace.c b/src/H5Fspace.c
index 53570f6..6baf163 100644
--- a/src/H5Fspace.c
+++ b/src/H5Fspace.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -77,7 +75,7 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_alloc
+ * Function:    H5F__alloc
  *
  * Purpose:     Wrapper for H5FD_alloc, to make certain EOA changes are
  *		reflected in superblock.
@@ -95,11 +93,11 @@
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5F_alloc(H5F_t *f, hid_t dxpl_id, H5F_mem_t type, hsize_t size, haddr_t *frag_addr, hsize_t *frag_size)
+H5F__alloc(H5F_t *f, H5F_mem_t type, hsize_t size, haddr_t *frag_addr, hsize_t *frag_size)
 {
     haddr_t     ret_value = 0;          /* Return value */
 
-    FUNC_ENTER_NOAPI(HADDR_UNDEF)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -122,21 +120,21 @@ H5F_alloc(H5F_t *f, hid_t dxpl_id, H5F_mem_t type, hsize_t size, haddr_t *frag_a
     } /* end if */
 
     /* Call the file driver 'alloc' routine */
-    ret_value = H5FD_alloc(f->shared->lf, dxpl_id, type, f, size, frag_addr, frag_size);
+    ret_value = H5FD_alloc(f->shared->lf, type, f, size, frag_addr, frag_size);
     if(!H5F_addr_defined(ret_value))
         HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, HADDR_UNDEF, "file driver 'alloc' request failed")
 
     /* Mark EOA dirty */
-    if(H5F_eoa_dirty(f, dxpl_id) < 0)
+    if(H5F_eoa_dirty(f) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, HADDR_UNDEF, "unable to mark EOA as dirty")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_alloc() */
+} /* end H5F__alloc() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_free
+ * Function:    H5F__free
  *
  * Purpose:     Wrapper for H5FD_free, to make certain EOA changes are
  *		reflected in superblock.
@@ -154,11 +152,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_free(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t addr, hsize_t size)
+H5F__free(H5F_t *f, H5FD_mem_t type, haddr_t addr, hsize_t size)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Check args */
     HDassert(f);
@@ -168,20 +166,20 @@ H5F_free(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t addr, hsize_t size)
     HDassert(size > 0);
 
     /* Call the file driver 'free' routine */
-    if(H5FD_free(f->shared->lf, dxpl_id, type, f, addr, size) < 0)
+    if(H5FD_free(f->shared->lf, type, f, addr, size) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFREE, FAIL, "file driver 'free' request failed")
 
     /* Mark EOA dirty */
-    if(H5F_eoa_dirty(f, dxpl_id) < 0)
+    if(H5F_eoa_dirty(f) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark EOA as dirty")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_free() */
+} /* end H5F__free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_try_extend
+ * Function:    H5F__try_extend
  *
  * Purpose:	Extend a block at the end of the file, if possible.
  *
@@ -199,11 +197,11 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5F_try_extend(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t blk_end, hsize_t extra_requested)
+H5F__try_extend(H5F_t *f, H5FD_mem_t type, haddr_t blk_end, hsize_t extra_requested)
 {
     htri_t ret_value = FALSE;   /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -213,7 +211,7 @@ H5F_try_extend(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t blk_end, hsize_
     HDassert(extra_requested > 0);
 
     /* Extend the object by extending the underlying file */
-    if((ret_value = H5FD_try_extend(f->shared->lf, type, f, dxpl_id, blk_end, extra_requested)) < 0)
+    if((ret_value = H5FD_try_extend(f->shared->lf, type, f, blk_end, extra_requested)) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTEXTEND, FAIL, "driver try extend request failed")
 
     /* H5FD_try_extend() updates driver message and marks the superblock
@@ -222,5 +220,5 @@ H5F_try_extend(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, haddr_t blk_end, hsize_
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5F_try_extend() */
+} /* end H5F__try_extend() */
 
diff --git a/src/H5Fsuper.c b/src/H5Fsuper.c
index 58ef9bb..97a6d6f 100644
--- a/src/H5Fsuper.c
+++ b/src/H5Fsuper.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -23,15 +21,16 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions                    */
+#include "H5private.h"          /* Generic Functions                    */
 #include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Eprivate.h"		/* Error handling                       */
+#include "H5CXprivate.h"        /* API Contexts                         */
+#include "H5Eprivate.h"         /* Error handling                       */
 #include "H5Fpkg.h"             /* File access                          */
-#include "H5FDprivate.h"	/* File drivers                         */
-#include "H5Iprivate.h"		/* IDs                                  */
+#include "H5FDprivate.h"        /* File drivers                         */
+#include "H5Iprivate.h"         /* IDs                                  */
 #include "H5MFprivate.h"        /* File memory management               */
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Pprivate.h"		/* Property lists                       */
+#include "H5MMprivate.h"        /* Memory management                    */
+#include "H5Pprivate.h"         /* Property lists                       */
 #include "H5SMprivate.h"        /* Shared Object Header Messages        */
 
 
@@ -53,15 +52,14 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5F_super_ext_create(H5F_t *f, hid_t dxpl_id, H5O_loc_t *ext_ptr);
-static herr_t H5F__update_super_ext_driver_msg(H5F_t *f, hid_t dxpl_id);
+static herr_t H5F__super_ext_create(H5F_t *f, H5O_loc_t *ext_ptr);
+static herr_t H5F__update_super_ext_driver_msg(H5F_t *f);
 
 
 /*********************/
 /* Package Variables */
 /*********************/
 
-
 /*****************************/
 /* Library Private Variables */
 /*****************************/
@@ -74,10 +72,16 @@ H5FL_DEFINE(H5F_super_t);
 /* Local Variables */
 /*******************/
 
+/* Format version bounds for superblock */
+static const unsigned HDF5_superblock_ver_bounds[] = {
+    HDF5_SUPERBLOCK_VERSION_DEF,    /* H5F_LIBVER_EARLIEST */
+    HDF5_SUPERBLOCK_VERSION_2,      /* H5F_LIBVER_V18 */
+    HDF5_SUPERBLOCK_VERSION_LATEST  /* H5F_LIBVER_LATEST */
+};
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_super_ext_create
+ * Function:    H5F__super_ext_create
  *
  * Purpose:     Create the superblock extension
  *
@@ -89,11 +93,11 @@ H5FL_DEFINE(H5F_super_t);
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F_super_ext_create(H5F_t *f, hid_t dxpl_id, H5O_loc_t *ext_ptr)
+H5F__super_ext_create(H5F_t *f, H5O_loc_t *ext_ptr)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(f);
@@ -117,7 +121,7 @@ H5F_super_ext_create(H5F_t *f, hid_t dxpl_id, H5O_loc_t *ext_ptr)
          * extension.
          */
         H5O_loc_reset(ext_ptr);
-        if(H5O_create(f, dxpl_id, (size_t)0, (size_t)1, H5P_GROUP_CREATE_DEFAULT, ext_ptr) < 0)
+        if(H5O_create(f, (size_t)0, (size_t)1, H5P_GROUP_CREATE_DEFAULT, ext_ptr) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "unable to create superblock extension")
 
         /* Record the address of the superblock extension */
@@ -126,7 +130,7 @@ H5F_super_ext_create(H5F_t *f, hid_t dxpl_id, H5O_loc_t *ext_ptr)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5F_super_ext_create() */
+} /* H5F__super_ext_create() */
 
 
 /*-------------------------------------------------------------------------
@@ -160,7 +164,7 @@ H5F_super_ext_open(H5F_t *f, haddr_t ext_addr, H5O_loc_t *ext_ptr)
 
     /* Open the superblock extension object header */
     if(H5O_open(ext_ptr) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open superblock extension")
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open superblock extension")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -168,7 +172,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:   H5F_super_ext_close
+ * Function:   H5F__super_ext_close
  *
  * Purpose:    Close superblock extension
  *
@@ -180,14 +184,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_super_ext_close(H5F_t *f, H5O_loc_t *ext_ptr, hid_t dxpl_id,
-    hbool_t was_created)
+H5F__super_ext_close(H5F_t *f, H5O_loc_t *ext_ptr, hbool_t was_created)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(f);
@@ -195,16 +197,15 @@ H5F_super_ext_close(H5F_t *f, H5O_loc_t *ext_ptr, hid_t dxpl_id,
 
     /* Check if extension was created */
     if(was_created) {
-        /* Set the ring type in the DXPL */
-        if(H5AC_set_ring(dxpl_id, H5AC_RING_SBE, &dxpl, &orig_ring) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set ring value")
+        /* Set the ring type in the API context */
+        H5AC_set_ring(H5AC_RING_SBE, &orig_ring);
 
         /* Increment link count on superblock extension's object header */
-        if(H5O_link(ext_ptr, 1, dxpl_id) < 0)
+        if(H5O_link(ext_ptr, 1) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_LINKCOUNT, FAIL, "unable to increment hard link count")
 
         /* Decrement refcount on superblock extension's object header in memory */
-        if(H5O_dec_rc_by_loc(ext_ptr, dxpl_id) < 0)
+        if(H5O_dec_rc_by_loc(ext_ptr) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTDEC, FAIL, "unable to decrement refcount on superblock extension");
     } /* end if */
 
@@ -215,23 +216,23 @@ H5F_super_ext_close(H5F_t *f, H5O_loc_t *ext_ptr, hid_t dxpl_id,
     f->nopen_objs--;
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5F_super_ext_close() */
+} /* H5F__super_ext_close() */
 
 
 /*-------------------------------------------------------------------------
  * Function:    H5F__update_super_ext_driver_msg
  *
- * Purpose:	Update the superblock extension file driver info message if 
- *		we are using a V 2 superblock.  Observe that the function
- *		is a NO-OP if the file driver info message does not exist.
+ * Purpose:     Update the superblock extension file driver info message if 
+ *              we are using a V 2 superblock.  Observe that the function
+ *              is a NO-OP if the file driver info message does not exist.
  *              This is necessary, as the function is called whenever the 
- *		EOA is updated, and were it to create the file driver info
- *		message, it would find itself in an infinite recursion.
+ *              EOA is updated, and were it to create the file driver info
+ *              message, it would find itself in an infinite recursion.
  *
  * Return:      Success:        SUCCEED
  *              Failure:        FAIL
@@ -242,7 +243,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5F__update_super_ext_driver_msg(H5F_t *f, hid_t dxpl_id)
+H5F__update_super_ext_driver_msg(H5F_t *f)
 {
     H5F_super_t *sblock;        /* Pointer to the super block */
     herr_t ret_value = SUCCEED; /* Return value */
@@ -269,7 +270,7 @@ H5F__update_super_ext_driver_msg(H5F_t *f, hid_t dxpl_id)
                 /* Check for driver info */
                 H5_CHECKED_ASSIGN(driver_size, size_t, H5FD_sb_size(f->shared->lf), hsize_t);
 
-		/* Nothing to do unless there is both driver info and 
+                /* Nothing to do unless there is both driver info and 
                  * the driver info superblock extension message has 
                  * already been created.
                  */
@@ -291,7 +292,7 @@ H5F__update_super_ext_driver_msg(H5F_t *f, hid_t dxpl_id)
                      */
                     drvinfo.len = driver_size;
                     drvinfo.buf = dbuf;
-                    if(H5F_super_ext_write_msg(f, dxpl_id, H5O_DRVINFO_ID, &drvinfo, FALSE, H5O_MSG_NO_FLAGS_SET) < 0)
+                    if(H5F__super_ext_write_msg(f, H5O_DRVINFO_ID, &drvinfo, FALSE, H5O_MSG_NO_FLAGS_SET) < 0)
                         HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "unable to update driver info header message")
                 } /* end if driver_size > 0 */
             } /* end if !H5F_HAS_FEATURE(f, H5FD_FEAT_IGNORE_DRVRINFO) */
@@ -321,44 +322,92 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial_read)
+H5F__super_read(H5F_t *f, H5P_genplist_t *fa_plist, hbool_t initial_read)
 {
-    H5P_genplist_t     *dxpl = NULL;        /* DXPL object */
-    H5AC_ring_t         ring, orig_ring = H5AC_RING_INV;
+    H5AC_ring_t         orig_ring = H5AC_RING_INV;
     H5F_super_t *       sblock = NULL;      /* Superblock structure */
     H5F_superblock_cache_ud_t udata;        /* User data for cache callbacks */
     H5P_genplist_t     *c_plist;            /* File creation property list  */
-    H5FD_io_info_t      fdio_info;          /* File driver I/O info */
+    H5FD_t              *file;              /* File driver pointer */
     unsigned            sblock_flags = H5AC__NO_FLAGS_SET;       /* flags used in superblock unprotect call      */
     haddr_t             super_addr;         /* Absolute address of superblock */
     haddr_t             eof;                /* End of file address */
-    unsigned      	rw_flags;           /* Read/write permissions for file */
-    hbool_t 		skip_eof_check = FALSE; /* Whether to skip checking the EOF value */
-    herr_t              ret_value = SUCCEED; /* Return value */
+    unsigned            rw_flags;           /* Read/write permissions for file */
+    hbool_t             skip_eof_check = FALSE; /* Whether to skip checking the EOF value */
+#ifdef H5_HAVE_PARALLEL
+    int                 mpi_size = 1;
+#endif /* H5_HAVE_PARALLEL */
+    herr_t              ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(meta_dxpl_id, H5AC__SUPERBLOCK_TAG, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(H5AC__SUPERBLOCK_TAG)
 
     /* initialize the drvinfo to NULL -- we will overwrite this if there
      * is a driver information block 
      */
     f->shared->drvinfo = NULL;
 
-    /* Get the DXPL plist object for DXPL ID */
-    if(NULL == (dxpl = (H5P_genplist_t *)H5I_object(meta_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    if((H5P_get(dxpl, H5AC_RING_NAME, &orig_ring)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get property value");
-
     /* Set up file driver I/O info */
-    fdio_info.file = f->shared->lf;
-    fdio_info.meta_dxpl = dxpl;
-    if(NULL == (fdio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(raw_dxpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
+    file = f->shared->lf;
 
     /* Find the superblock */
-    if(H5FD_locate_signature(&fdio_info, &super_addr) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable to locate file signature")
-    if(HADDR_UNDEF == super_addr)
+#ifdef H5_HAVE_PARALLEL
+    if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI))
+        if((mpi_size = H5F_mpi_get_size(f)) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't retrieve MPI communicator size")
+
+    /* If we are an MPI application with at least two processes, the
+     * following superblock signature location optimization is applicable.
+     *
+     * Note:: For parallel applications which don't setup for using the
+     * HDF5 MPIO driver, we will arrive here with mpi_size == 1.
+     * This occurs because of the variable initialization (above) and the
+     * fact that we have skipped actually calling MPI functions to determine
+     * our MPI rank and size.
+     */
+    if(mpi_size > 1) {
+        MPI_Comm this_comm;
+        int mpi_rank;
+        int mpi_result;
+
+        /* Sanity check */
+        HDassert(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI));
+
+        /* Set up MPI info */
+        if((mpi_rank = H5F_mpi_get_rank(f)) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "Can't get MPI rank")
+        if(MPI_COMM_NULL == (this_comm = H5F_mpi_get_comm(f)))
+            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MPI communicator")
+
+        /* Search for the file's signature only with rank 0 process */
+        if(0 == mpi_rank) {
+            herr_t status;
+
+            /* Try detecting file's siganture */
+            /* (Don't leave before Bcast, to avoid hang on error) */
+            H5E_BEGIN_TRY {
+                status = H5FD_locate_signature(file, &super_addr);
+            } H5E_END_TRY;
+
+            /* Set superblock address to undefined on error */
+            if(status < 0)
+                super_addr = HADDR_UNDEF;
+        } /* end if */
+
+        /* Broadcast superblock address to other processes */
+        if(MPI_SUCCESS != (mpi_result = MPI_Bcast(&super_addr, sizeof(super_addr), MPI_BYTE, 0, this_comm)))
+            HMPI_GOTO_ERROR(FAIL, "MPI_Bcast failed", mpi_result)
+    } /* end if */
+    else {
+    /* Locate the signature as per per the serial library */
+#endif /* H5_HAVE_PARALLEL */
+
+        if(H5FD_locate_signature(file, &super_addr) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable to locate file signature")
+
+#ifdef H5_HAVE_PARALLEL
+    } /* end else */
+#endif /* H5_HAVE_PARALLEL */
+    if(!H5F_addr_defined(super_addr))
         HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "file signature not found")
 
     /* Check for userblock present */
@@ -398,22 +447,53 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
     udata.stored_eof = HADDR_UNDEF;
     udata.drvrinfo_removed = FALSE;
 
-    /* Set the ring type in the DXPL */
-    ring = H5AC_RING_SB;
-    if((H5P_set(dxpl, H5AC_RING_NAME, &ring)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set property value");
+    /* Set the ring type in the API context */
+    H5AC_set_ring(H5AC_RING_SB, &orig_ring);
 
     /* Look up the superblock */
-    if(NULL == (sblock = (H5F_super_t *)H5AC_protect(f, meta_dxpl_id, H5AC_SUPERBLOCK, (haddr_t)0, &udata, rw_flags)))
+    if(NULL == (sblock = (H5F_super_t *)H5AC_protect(f, H5AC_SUPERBLOCK, (haddr_t)0, &udata, rw_flags)))
         HGOTO_ERROR(H5E_FILE, H5E_CANTPROTECT, FAIL, "unable to load superblock")
 
-    if(H5F_INTENT(f) & H5F_ACC_SWMR_WRITE)
-       	if(sblock->super_vers < HDF5_SUPERBLOCK_VERSION_3)
-	    HGOTO_ERROR(H5E_FILE, H5E_CANTPROTECT, FAIL, "invalid superblock version for SWMR_WRITE")
+    /* 
+     * When opening a file with SWMR-write access, the library will first
+     * check to ensure that superblock version 3 is used.  Otherwise fail 
+     * file open.
+     *
+     * Then the library will upgrade the file's low_bound depending on 
+     * superblock version as follows:
+     *      --version 0 or 1: no change to low_bound
+     *      --version 2: upgrade low_bound to at least V18
+     *      --version 3: upgrade low_bound to at least V110
+     *
+     * Upgrading low_bound will give the best format versions available for
+     * that superblock version.  Due to the possible upgrade, the fapl returned
+     * from H5Fget_access_plist() might indicate a low_bound higher than what
+     * the user originally set.
+     *
+     * After upgrading low_bound, the library will check to ensure that the
+     * superblock version does not exceed the version allowed by high_bound.
+     * Otherise fail file open.
+     *
+     * For details, please see RFC:Setting Bounds for Object Creation in HDF5 1.10.0.
+     */
+
+    /* Check to ensure that superblock version 3 is used for SWMR-write access */
+    if(H5F_INTENT(f) & H5F_ACC_SWMR_WRITE) {
+        if(sblock->super_vers  < HDF5_SUPERBLOCK_VERSION_3)
+            HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "superblock version for SWMR is less than 3")
+    }
+
+    /* Upgrade low_bound to at least V18 when encountering version 2 superblock */
+    if(sblock->super_vers == HDF5_SUPERBLOCK_VERSION_2)
+        f->shared->low_bound = MAX(H5F_LIBVER_V18, f->shared->low_bound);
 
-    /* Enable all latest version support when file has v3 superblock */
+    /* Upgrade low_bound to at least V110 when encountering version 3 superblock */
     if(sblock->super_vers >= HDF5_SUPERBLOCK_VERSION_3)
-	f->shared->latest_flags |= H5F_LATEST_ALL_FLAGS;
+        f->shared->low_bound = MAX(H5F_LIBVER_V110, f->shared->low_bound);
+
+    /* Version bounds check */
+    if(sblock->super_vers > HDF5_superblock_ver_bounds[f->shared->high_bound])
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "superblock version exceeds high bound")
 
     /* Pin the superblock in the cache */
     if(H5AC_pin_protected_entry(sblock) < 0)
@@ -512,16 +592,27 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
      * as the file can appear truncated if only part of it has been
      * been flushed to disk by the SWMR writer process.
      */
+    /* The EOF check is also skipped when the private property 
+     * H5F_ACS_SKIP_EOF_CHECK_NAME exists in the fapl.  
+     * This property is enabled by the tool h5clear with these
+     * two options: (1) --filesize (2) --increment
+     */
+
+    /* Check if this private property exists in fapl */
+    if(H5P_exist_plist(fa_plist, H5F_ACS_SKIP_EOF_CHECK_NAME) > 0)
+        if(H5P_get(fa_plist, H5F_ACS_SKIP_EOF_CHECK_NAME, &skip_eof_check) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get skip EOF check value")
+
     if(H5F_INTENT(f) & H5F_ACC_SWMR_READ) {
-	/* 
-	 * When the file is opened for SWMR read access, skip the check if:
-	 * --the file is already marked for SWMR writing and
-	 * --the file has version 3 superblock for SWMR support
-	 */
-	if((sblock->status_flags & H5F_SUPER_SWMR_WRITE_ACCESS) &&
+        /* 
+         * When the file is opened for SWMR read access, skip the check if:
+         * --the file is already marked for SWMR writing and
+         * --the file has version 3 superblock for SWMR support
+         */
+        if((sblock->status_flags & H5F_SUPER_SWMR_WRITE_ACCESS) &&
                (sblock->status_flags & H5F_SUPER_WRITE_ACCESS) &&
                 sblock->super_vers >= HDF5_SUPERBLOCK_VERSION_3)
-	    skip_eof_check = TRUE;
+            skip_eof_check = TRUE;
     } /* end if */
     if(!skip_eof_check && initial_read) {
         if(HADDR_UNDEF == (eof = H5FD_get_eof(f->shared->lf, H5FD_MEM_DEFAULT)))
@@ -537,10 +628,8 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
      * allocated so that it knows how to allocate additional memory.
      */
 
-    /* Set the ring type in the DXPL */
-    ring = H5AC_RING_SBE;
-    if((H5P_set(dxpl, H5AC_RING_NAME, &ring)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set property value");
+    /* Set the ring type in the API context */
+    H5AC_set_ring(H5AC_RING_SBE, NULL);
 
     /* Decode the optional driver information block */
     if(H5F_addr_defined(sblock->driver_addr)) {
@@ -564,7 +653,7 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
             HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "set end of space allocation request failed")
 
         /* Look up the driver info block */
-        if(NULL == (drvinfo = (H5O_drvinfo_t *)H5AC_protect(f, meta_dxpl_id, H5AC_DRVRINFO, sblock->driver_addr, &drvrinfo_udata, rw_flags)))
+        if(NULL == (drvinfo = (H5O_drvinfo_t *)H5AC_protect(f, H5AC_DRVRINFO, sblock->driver_addr, &drvrinfo_udata, rw_flags)))
             HGOTO_ERROR(H5E_FILE, H5E_CANTPROTECT, FAIL, "unable to load driver info block")
 
         /* Loading the driver info block is enough to set up the right info */
@@ -579,7 +668,7 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
         drvinfo_flags |= H5AC__PIN_ENTRY_FLAG;
 
         /* Release the driver info block */
-        if(H5AC_unprotect(f, meta_dxpl_id, H5AC_DRVRINFO, sblock->driver_addr, drvinfo, drvinfo_flags) < 0)
+        if(H5AC_unprotect(f, H5AC_DRVRINFO, sblock->driver_addr, drvinfo, drvinfo_flags) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTUNPROTECT, FAIL, "unable to release driver info block")
 
         /* save a pointer to the driver information cache entry */
@@ -595,7 +684,7 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
         H5O_loc_t ext_loc;      /* "Object location" for superblock extension */
         H5O_btreek_t btreek;    /* v1 B-tree 'K' value message from superblock extension */
         H5O_drvinfo_t drvinfo;  /* Driver info message from superblock extension */
-	size_t u; 		/* Local index variable */
+        size_t u;               /* Local index variable */
         htri_t status;          /* Status for message existing */
 
         /* Sanity check - superblock extension should only be defined for
@@ -616,18 +705,18 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
         } /* end if */
 
         /* Open the superblock extension */
-	if(H5F_super_ext_open(f, sblock->ext_addr, &ext_loc) < 0)
+        if(H5F_super_ext_open(f, sblock->ext_addr, &ext_loc) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTOPENOBJ, FAIL, "unable to open file's superblock extension")
 
         /* Check for the extension having a 'driver info' message */
-        if((status = H5O_msg_exists(&ext_loc, H5O_DRVINFO_ID, meta_dxpl_id)) < 0)
+        if((status = H5O_msg_exists(&ext_loc, H5O_DRVINFO_ID)) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_EXISTS, FAIL, "unable to read object header")
         if(status) {
             /* Check for ignoring the driver info for this file */
             if(!udata.ignore_drvrinfo) {
 
                 /* Retrieve the 'driver info' structure */
-                if(NULL == H5O_msg_read(&ext_loc, H5O_DRVINFO_ID, &drvinfo, meta_dxpl_id))
+                if(NULL == H5O_msg_read(&ext_loc, H5O_DRVINFO_ID, &drvinfo))
                     HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "driver info message not present")
 
                 /* Validate and decode driver information */
@@ -639,21 +728,21 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
                 /* Reset driver info message */
                 H5O_msg_reset(H5O_DRVINFO_ID, &drvinfo);
 
-		HDassert(FALSE == f->shared->drvinfo_sb_msg_exists);
-		f->shared->drvinfo_sb_msg_exists = TRUE;
+                HDassert(FALSE == f->shared->drvinfo_sb_msg_exists);
+                f->shared->drvinfo_sb_msg_exists = TRUE;
             } /* end else */
         } /* end if */
 
         /* Read in the shared OH message information if there is any */
-        if(H5SM_get_info(&ext_loc, c_plist, meta_dxpl_id) < 0)
+        if(H5SM_get_info(&ext_loc, c_plist) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to read SOHM table information")
 
         /* Check for the extension having a 'v1 B-tree "K"' message */
-        if((status = H5O_msg_exists(&ext_loc, H5O_BTREEK_ID, meta_dxpl_id)) < 0)
+        if((status = H5O_msg_exists(&ext_loc, H5O_BTREEK_ID)) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_EXISTS, FAIL, "unable to read object header")
         if(status) {
             /* Retrieve the 'v1 B-tree "K"' structure */
-            if(NULL == H5O_msg_read(&ext_loc, H5O_BTREEK_ID, &btreek, meta_dxpl_id))
+            if(NULL == H5O_msg_read(&ext_loc, H5O_BTREEK_ID, &btreek))
                 HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "v1 B-tree 'K' info message not present")
 
             /* Set non-default v1 B-tree 'K' value info from file */
@@ -669,21 +758,29 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
         } /* end if */
 
         /* Check for the extension having a 'free-space manager info' message */
-        if((status = H5O_msg_exists(&ext_loc, H5O_FSINFO_ID, meta_dxpl_id)) < 0)
+        if((status = H5O_msg_exists(&ext_loc, H5O_FSINFO_ID)) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_EXISTS, FAIL, "unable to read object header")
         if(status) {
-            H5O_fsinfo_t fsinfo;   /* File space info message from superblock extension */
             uint8_t flags;          /* Message flags */
 
             /* Get message flags */
-            if(H5O_msg_get_flags(&ext_loc, H5O_FSINFO_ID, meta_dxpl_id, &flags) < 0)
+            if(H5O_msg_get_flags(&ext_loc, H5O_FSINFO_ID, &flags) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to message flags for free-space manager info message")
 
             /* If message is NOT marked "unknown"--set up file space info  */
             if(!(flags & H5O_MSG_FLAG_WAS_UNKNOWN)) {
+                H5O_fsinfo_t fsinfo;   /* File space info message from superblock extension */
+                hbool_t null_fsm_addr = FALSE;  /* Whether to drop free-space to the floor */
+
+                /* The h5clear tool uses this property to tell the library
+                 * to drop free-space to the floor
+                 */
+                if(H5P_exist_plist(fa_plist, H5F_ACS_NULL_FSM_ADDR_NAME) > 0)
+                    if(H5P_get(fa_plist, H5F_ACS_NULL_FSM_ADDR_NAME, &null_fsm_addr) < 0)
+                        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get clearance for persisting fsm addr")
 
                 /* Retrieve the 'file space info' structure */
-                if(NULL == H5O_msg_read(&ext_loc, H5O_FSINFO_ID, &fsinfo, meta_dxpl_id))
+                if(NULL == H5O_msg_read(&ext_loc, H5O_FSINFO_ID, &fsinfo))
                     HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get free-space manager info message")
 
                 /* Update changed values */
@@ -725,27 +822,56 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
                 if(f->shared->eoa_pre_fsm_fsalloc != fsinfo.eoa_pre_fsm_fsalloc)
                     f->shared->eoa_pre_fsm_fsalloc = fsinfo.eoa_pre_fsm_fsalloc;
 
-                /* f->shared->eoa_pre_fsm_fsalloc must always be HADDR_UNDEF
-                 * in the absence of persistant free space managers.
+               /* f->shared->eoa_pre_fsm_fsalloc must always be HADDR_UNDEF
+                * in the absence of persistant free space managers.
+                */
+                /* If the following two conditions are true:
+                 *       (1) skipping EOF check (skip_eof_check)
+                 *       (2) dropping free-space to the floor (null_fsm_addr)
+                 *  skip the asserts as "eoa_pre_fsm_fsalloc" may be undefined
+                 *  for a crashed file with persistant free space managers.
+                 *  #1 and #2 are enabled when the tool h5clear --increment
+                 *  option is used.
                  */
-                HDassert((!f->shared->fs_persist) || (f->shared->eoa_pre_fsm_fsalloc != HADDR_UNDEF));
-                HDassert(!f->shared->first_alloc_dealloc);
+                if(!skip_eof_check && !null_fsm_addr) {
+                     HDassert((!f->shared->fs_persist) || (f->shared->eoa_pre_fsm_fsalloc != HADDR_UNDEF));
+                     HDassert(!f->shared->first_alloc_dealloc);
+                } /* end if */
 
-                if((f->shared->eoa_pre_fsm_fsalloc != HADDR_UNDEF) &&
-                   (H5F_INTENT(f) & H5F_ACC_RDWR))
+                /* As "eoa_pre_fsm_fsalloc" may be undefined for a crashed file
+                 * with persistant free space managers, therefore, set
+                 * "first_alloc_dealloc" when the condition 
+                 * "dropping free-space to the floor is true.
+                 * This will ensure that no action is done to settle things on file
+                 * close via H5MF_settle_meta_data_fsm() and H5MF_settle_raw_data_fsm().
+                 */
+                if((f->shared->eoa_pre_fsm_fsalloc != HADDR_UNDEF || null_fsm_addr) &&
+                        (H5F_INTENT(f) & H5F_ACC_RDWR))
                     f->shared->first_alloc_dealloc = TRUE;
 
                 f->shared->fs_addr[0] = HADDR_UNDEF;
                 for(u = 1; u < NELMTS(f->shared->fs_addr); u++)
                     f->shared->fs_addr[u] = fsinfo.fs_addr[u - 1];
 
-                if(fsinfo.mapped && (rw_flags & H5AC__READ_ONLY_FLAG) == 0) {
+                /* If the following two conditions are true:
+                 *      (1) file is persisting free-space 
+                 *      (2) dropping free-space to the floor (null_fsm_addr)
+                 * nullify the addresses of the FSMs 
+                 */
+                if(f->shared->fs_persist && null_fsm_addr)
+                    for(u = 0; u < NELMTS(fsinfo.fs_addr); u++)
+                        f->shared->fs_addr[u] = fsinfo.fs_addr[u] = HADDR_UNDEF;
+
+                /* For fsinfo.mapped: remove the FSINFO message from the superblock extension
+                   and write a new message to the extension */
+                /* For null_fsm_addr: just update FSINFO message in the superblock extension */
+                if(((fsinfo.mapped || null_fsm_addr) && (rw_flags & H5AC__READ_ONLY_FLAG) == 0)) {
 
                     /* Do the same kluge until we know for sure.  VC */
 #if 1 /* bug fix test code -- tidy this up if all goes well */ /* JRM */
                     /* KLUGE ALERT!!
                      *
-                     * H5F_super_ext_write_msg() expects f->shared->sblock to 
+                     * H5F__super_ext_write_msg() expects f->shared->sblock to 
                      * be set -- verify that it is NULL, and then set it.
                      * Set it back to NULL when we are done.
                      */
@@ -753,50 +879,56 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
                      f->shared->sblock = sblock;
 #endif /* JRM */
 
-                    if(H5F_super_ext_remove_msg(f, meta_dxpl_id, H5O_FSINFO_ID) < 0)
-                        HGOTO_ERROR(H5E_FILE, H5E_CANTDELETE, FAIL,  "error in removing message from superblock extension")
-
-                    if(H5F_super_ext_write_msg(f, meta_dxpl_id, H5O_FSINFO_ID, &fsinfo, TRUE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
-                        HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "error in writing fsinfo message to superblock extension")
+                    if(null_fsm_addr) {
+                        if(H5F__super_ext_write_msg(f, H5O_FSINFO_ID, &fsinfo, FALSE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
+                            HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "error in writing fsinfo message to superblock extension")
+                    } /* end if */
+                    else {
+                        if(H5F__super_ext_remove_msg(f, H5O_FSINFO_ID) < 0)
+                            HGOTO_ERROR(H5E_FILE, H5E_CANTDELETE, FAIL,  "error in removing message from superblock extension")
+
+                        if(H5F__super_ext_write_msg(f, H5O_FSINFO_ID, &fsinfo, TRUE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
+                            HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "error in writing fsinfo message to superblock extension")
+                    } /* end else */
 #if 1 /* bug fix test code -- tidy this up if all goes well */ /* JRM */
                     f->shared->sblock = NULL;
 #endif /* JRM */
 
-                }
+                } /* end if */
             } /* end if not marked "unknown" */
         } /* end if */
 
-	/* Check for the extension having a 'metadata cache image' message */
-        if((status = H5O_msg_exists(&ext_loc, H5O_MDCI_MSG_ID, meta_dxpl_id)) < 0)
+        /* Check for the extension having a 'metadata cache image' message */
+        if((status = H5O_msg_exists(&ext_loc, H5O_MDCI_MSG_ID)) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_EXISTS, FAIL, "unable to read object header")
         if(status) {
-            hbool_t 	rw = ((rw_flags & H5AC__READ_ONLY_FLAG) == 0);
-	    H5O_mdci_t  mdci_msg;
+            hbool_t     rw = ((rw_flags & H5AC__READ_ONLY_FLAG) == 0);
+            H5O_mdci_t  mdci_msg;
 
-	    /* if the metadata cache image superblock extension message exists,
+            /* if the metadata cache image superblock extension message exists,
              * read its contents and pass the data on to the metadata cache.
              * Given this data, the cache will load and decode the metadata
- 	     * cache image block, decoded it and load its contents into the 
-	     * the cache on the test protect call.  
+             * cache image block, decoded it and load its contents into the 
+             * the cache on the test protect call.  
              *
              * Further, if the file is opened R/W, the metadata cache will 
-	     * delete the metadata cache image superblock extension and free
-	     * the cache image block.  Don't do this now as f->shared 
-	     * is not fully setup, which complicates matters.
+             * delete the metadata cache image superblock extension and free
+             * the cache image block.  Don't do this now as f->shared 
+             * is not fully setup, which complicates matters.
              */
 
             /* Retrieve the 'metadata cache image message' structure */
-	    if(NULL == H5O_msg_read(&ext_loc, H5O_MDCI_MSG_ID, &mdci_msg, meta_dxpl_id))
+            if(NULL == H5O_msg_read(&ext_loc, H5O_MDCI_MSG_ID, &mdci_msg))
                 HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get metadata cache image message")
 
             /* Indicate to the cache that there's an image to load on first protect call */
             if(H5AC_load_cache_image_on_next_protect(f, mdci_msg.addr, mdci_msg.size, rw) < 0)
-		HGOTO_ERROR(H5E_FILE, H5E_CANTLOAD, FAIL, "call to H5AC_load_cache_image_on_next_protect failed");
+                HGOTO_ERROR(H5E_FILE, H5E_CANTLOAD, FAIL, "call to H5AC_load_cache_image_on_next_protect failed");
         } /* end if */
 
         /* Close superblock extension */
-        if(H5F_super_ext_close(f, &ext_loc, meta_dxpl_id, FALSE) < 0)
-	    HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEOBJ, FAIL, "unable to close file's superblock extension")
+        if(H5F__super_ext_close(f, &ext_loc, FALSE) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEOBJ, FAIL, "unable to close file's superblock extension")
     } /* end if */
 
     /* Update the driver info if VFD indicated to do so */
@@ -832,14 +964,14 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
 #if 1 /* bug fix test code -- tidy this up if all goes well */ /* JRM */
 		/* KLUGE ALERT!!
 		 *
-		 * H5F_super_ext_write_msg() expects f->shared->sblock to 
+		 * H5F__super_ext_write_msg() expects f->shared->sblock to 
 		 * be set -- verify that it is NULL, and then set it.
 		 * Set it back to NULL when we are done.
 		 */
 		HDassert(f->shared->sblock == NULL);
 		f->shared->sblock = sblock;
 #endif /* JRM */
-		if(H5F_super_ext_write_msg(f, meta_dxpl_id, H5O_DRVINFO_ID, &drvinfo, FALSE, H5O_MSG_NO_FLAGS_SET) < 0)
+		if(H5F__super_ext_write_msg(f, H5O_DRVINFO_ID, &drvinfo, FALSE, H5O_MSG_NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_FILE, H5E_WRITEERROR, FAIL, "error in writing message to superblock extension")
 
 #if 1 /* bug fix test code -- tidy this up if all goes well */ /* JRM */
@@ -851,7 +983,7 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
         /* Check for eliminating the driver info block */
         else if(H5F_HAS_FEATURE(f, H5FD_FEAT_IGNORE_DRVRINFO)) {
             /* Remove the driver info message from the superblock extension */
-            if(H5F_super_ext_remove_msg(f, meta_dxpl_id, H5O_DRVINFO_ID) < 0)
+            if(H5F__super_ext_remove_msg(f, H5O_DRVINFO_ID) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "error in removing message from superblock extension")
 
             /* Check if the superblock extension was removed */
@@ -868,12 +1000,12 @@ H5F__super_read(H5F_t *f, hid_t meta_dxpl_id, hid_t raw_dxpl_id, hbool_t initial
         HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "failed to set paged_aggr status for file driver")
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     /* Release the superblock */
-    if(sblock && H5AC_unprotect(f, meta_dxpl_id, H5AC_SUPERBLOCK, (haddr_t)0, sblock, sblock_flags) < 0)
+    if(sblock && H5AC_unprotect(f, H5AC_SUPERBLOCK, (haddr_t)0, sblock, sblock_flags) < 0)
         HDONE_ERROR(H5E_FILE, H5E_CANTUNPROTECT, FAIL, "unable to close superblock")
 
     /* If we have failed, make sure no entries are left in the 
@@ -886,7 +1018,7 @@ done:
                 HDONE_ERROR(H5E_FILE, H5E_CANTUNPIN, FAIL, "unable to unpin driver info")
 
             /* Evict the driver info block from the cache */
-            if(H5AC_expunge_entry(f, meta_dxpl_id, H5AC_DRVRINFO, sblock->driver_addr, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_expunge_entry(f, H5AC_DRVRINFO, sblock->driver_addr, H5AC__NO_FLAGS_SET) < 0)
                 HDONE_ERROR(H5E_FILE, H5E_CANTEXPUNGE, FAIL, "unable to expunge driver info block")
         } /* end if */
 
@@ -897,12 +1029,12 @@ done:
                 HDONE_ERROR(H5E_FILE, H5E_CANTUNPIN, FAIL, "unable to unpin superblock")
 
             /* Evict the superblock from the cache */
-            if(H5AC_expunge_entry(f, meta_dxpl_id, H5AC_SUPERBLOCK, (haddr_t)0, H5AC__NO_FLAGS_SET) < 0)
+            if(H5AC_expunge_entry(f, H5AC_SUPERBLOCK, (haddr_t)0, H5AC__NO_FLAGS_SET) < 0)
                 HDONE_ERROR(H5E_FILE, H5E_CANTEXPUNGE, FAIL, "unable to expunge superblock")
         } /* end if */
     } /* end if */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5F__super_read() */
 
 
@@ -923,15 +1055,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__super_init(H5F_t *f, hid_t dxpl_id)
+H5F__super_init(H5F_t *f)
 {
     H5F_super_t    *sblock = NULL;      /* Superblock cache structure                 */
     hbool_t         sblock_in_cache = FALSE;    /* Whether the superblock has been inserted into the metadata cache */
     H5O_drvinfo_t  *drvinfo = NULL;     /* Driver info */
     hbool_t         drvinfo_in_cache = FALSE;   /* Whether the driver info block has been inserted into the metadata cache */
     H5P_genplist_t *plist;              /* File creation property list                */
-    H5P_genplist_t *dxpl = NULL;
-    H5AC_ring_t ring, orig_ring = H5AC_RING_INV;
+    H5AC_ring_t orig_ring = H5AC_RING_INV;
     hsize_t         userblock_size;     /* Size of userblock, in bytes                */
     hsize_t         superblock_size;    /* Size of superblock, in bytes               */
     size_t          driver_size;        /* Size of driver info block (bytes)          */
@@ -942,7 +1073,7 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
     hbool_t         non_default_fs_settings = FALSE;    /* Whether the file has non-default free-space settings */
     herr_t          ret_value = SUCCEED; /* Return Value                              */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, H5AC__SUPERBLOCK_TAG, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(H5AC__SUPERBLOCK_TAG)
 
     /* Allocate space for the superblock */
     if(NULL == (sblock = H5FL_CALLOC(H5F_super_t)))
@@ -973,11 +1104,42 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
 	    f->shared->fs_page_size == H5F_FILE_SPACE_PAGE_SIZE_DEF))
         non_default_fs_settings = TRUE;
 
-    /* Bump superblock version if latest superblock version support is enabled */
-    if(H5F_USE_LATEST_FLAGS(f, H5F_LATEST_SUPERBLOCK))
-        super_vers = HDF5_SUPERBLOCK_VERSION_LATEST;
+    /* 
+     * When creating a file with write access, the library will:
+     *      -- set superblock version to 0, 1 or 2 based on feature enabled
+     *      -- no change to low_bound
+     * When creating a file with SWMR-write access, the library will:
+     * (See explanation (#) below.)
+     *      -- set superblock version to 3
+     *      -- upgrade low_bound to at least V110
+     *
+     * Then the library will finalize superblock version to that allowed by 
+     * low_bound if that is higher.
+     * Lastly, the library will check to ensure the superblock version does not 
+     * exceed the version allowed by high_bound. Otherwise fail file open.
+     *
+     * For details, please see RFC:Setting Bounds for Object Creation in HDF5 1.10.0.
+     *
+     * (#)
+     * Version 3 superblock is introduced in 1.10 for SWMR due to the problem of
+     * the status_flags field in the superblock. The problem is discussed in
+     * jira issue SWMR-79 and also in the RFC: File Format Changes in HDF5 1.10.0.
+     * The file's low_bound is upgraded for SWMR so that the library will
+     * use the best format versions available in 1.10.  
+     * Due to the possible upgrade, the fapl returned from H5Fget_access_plist() 
+     * might indicate a low_bound higher than what the user originally set.
+     */
+
+    /* 
+     * Creating a file with SWMR-write access will
+     * upgrade superblock version and low_bound
+     */
+    if(H5F_INTENT(f) & H5F_ACC_SWMR_WRITE) {
+        super_vers = HDF5_SUPERBLOCK_VERSION_3;
+        f->shared->low_bound = MAX(H5F_LIBVER_V110, f->shared->low_bound);
+
     /* Bump superblock version to create superblock extension for SOHM info */
-    else if(f->shared->sohm_nindexes > 0)
+    } else if(f->shared->sohm_nindexes > 0)
         super_vers = HDF5_SUPERBLOCK_VERSION_2;
     /* 
      *	Bump superblock version to create superblock extension for:
@@ -995,6 +1157,13 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
     else if(sblock->btree_k[H5B_CHUNK_ID] != HDF5_BTREE_CHUNK_IK_DEF)
         super_vers = HDF5_SUPERBLOCK_VERSION_1;
 
+    /* Finalize superblock version to that allowed by the file's low bound if higher */
+    super_vers = MAX(super_vers, HDF5_superblock_ver_bounds[f->shared->low_bound]);
+
+    /* Version bounds check */
+    if(super_vers > HDF5_superblock_ver_bounds[f->shared->high_bound])
+        HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "superblock version out of bounds")
+
     /* If a newer superblock version is required, set it here */
     if(super_vers != HDF5_SUPERBLOCK_VERSION_DEF) {
         H5P_genplist_t *c_plist;              /* Property list */
@@ -1019,8 +1188,8 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
 
     /* Sanity check the userblock size vs. the file's allocation alignment */
     if(userblock_size > 0) {
-	/* Set up the alignment to use for page or aggr fs */
-	hsize_t alignment = H5F_PAGED_AGGR(f) ? f->shared->fs_page_size : f->shared->alignment;
+        /* Set up the alignment to use for page or aggr fs */
+        hsize_t alignment = H5F_PAGED_AGGR(f) ? f->shared->fs_page_size : f->shared->alignment;
 
         if(userblock_size < alignment)
             HGOTO_ERROR(H5E_FILE, H5E_BADVALUE, FAIL, "userblock size must be > file object alignment")
@@ -1080,12 +1249,11 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
     if(super_vers < HDF5_SUPERBLOCK_VERSION_2)
         superblock_size += driver_size;
 
-    /* Set the ring type in the DXPL */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_SB, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set ring value")
+    /* Set the ring type in the API context */
+    H5AC_set_ring(H5AC_RING_SB, &orig_ring);
 
     /* Insert superblock into cache, pinned */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_SUPERBLOCK, (haddr_t)0, sblock, H5AC__PIN_ENTRY_FLAG | H5AC__FLUSH_LAST_FLAG | H5AC__FLUSH_COLLECTIVELY_FLAG) < 0)
+    if(H5AC_insert_entry(f, H5AC_SUPERBLOCK, (haddr_t)0, sblock, H5AC__PIN_ENTRY_FLAG | H5AC__FLUSH_LAST_FLAG | H5AC__FLUSH_COLLECTIVELY_FLAG) < 0)
         HGOTO_ERROR(H5E_CACHE, H5E_CANTINS, FAIL, "can't add superblock to cache")
     sblock_in_cache = TRUE;
 
@@ -1093,7 +1261,7 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
     f->shared->sblock = sblock;
 
     /* Allocate space for the superblock */
-    if(HADDR_UNDEF == H5MF_alloc(f, H5FD_MEM_SUPER, dxpl_id, superblock_size))
+    if(HADDR_UNDEF == H5MF_alloc(f, H5FD_MEM_SUPER, superblock_size))
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for superblock")
 
     /* set the drvinfo filed to NULL -- will overwrite this later if needed */
@@ -1132,10 +1300,8 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
     else
         need_ext = FALSE;
 
-    /* Set the ring type in the DXPL */
-    ring = H5AC_RING_SBE;
-    if((H5P_set(dxpl, H5AC_RING_NAME, &ring)) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Set the ring type in the API context */
+    H5AC_set_ring(H5AC_RING_SBE, NULL);
 
     /* Create the superblock extension for "extra" superblock data, if necessary. */
     if(need_ext) {
@@ -1147,18 +1313,17 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
          * be tuned if more information is added to the superblock
          * extension.
          */
-	if(H5F_super_ext_create(f, dxpl_id, &ext_loc) < 0)
+	if(H5F__super_ext_create(f, &ext_loc) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTCREATE, FAIL, "unable to create superblock extension")
         ext_created = TRUE;
 
         /* Create the Shared Object Header Message table and register it with
          *      the metadata cache, if this file supports shared messages.
          */
-        if(f->shared->sohm_nindexes > 0) {
+        if(f->shared->sohm_nindexes > 0)
             /* Initialize the shared message code & write the SOHM message to the extension */
-            if(H5SM_init(f, plist, &ext_loc, dxpl_id) < 0)
+            if(H5SM_init(f, plist, &ext_loc) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to create SOHM table")
-        } /* end if */
 
         /* Check for non-default v1 B-tree 'K' values to store */
         if(sblock->btree_k[H5B_SNODE_ID] != HDF5_BTREE_SNODE_IK_DEF ||
@@ -1170,7 +1335,7 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
             btreek.btree_k[H5B_CHUNK_ID] = sblock->btree_k[H5B_CHUNK_ID];
             btreek.btree_k[H5B_SNODE_ID] = sblock->btree_k[H5B_SNODE_ID];
             btreek.sym_leaf_k = sblock->sym_leaf_k;
-            if(H5O_msg_create(&ext_loc, H5O_BTREEK_ID, H5O_MSG_FLAG_CONSTANT | H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &btreek, dxpl_id) < 0)
+            if(H5O_msg_create(&ext_loc, H5O_BTREEK_ID, H5O_MSG_FLAG_CONSTANT | H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &btreek) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update v1 B-tree 'K' value header message")
         } /* end if */
 
@@ -1190,7 +1355,7 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
             /* Write driver info information to the superblock extension */
             info.len = driver_size;
             info.buf = dbuf;
-            if(H5O_msg_create(&ext_loc, H5O_DRVINFO_ID, H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &info, dxpl_id) < 0)
+            if(H5O_msg_create(&ext_loc, H5O_DRVINFO_ID, H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &info) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update driver info header message")
 
             HDassert(FALSE == f->shared->drvinfo_sb_msg_exists);
@@ -1214,7 +1379,7 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
             for(ptype = H5F_MEM_PAGE_SUPER; ptype < H5F_MEM_PAGE_NTYPES; H5_INC_ENUM(H5F_mem_page_t, ptype))
                 fsinfo.fs_addr[ptype - 1] = HADDR_UNDEF;
 
-            if(H5O_msg_create(&ext_loc, H5O_FSINFO_ID, H5O_MSG_FLAG_DONTSHARE | H5O_MSG_FLAG_MARK_IF_UNKNOWN, H5O_UPDATE_TIME, &fsinfo, dxpl_id) < 0)
+            if(H5O_msg_create(&ext_loc, H5O_FSINFO_ID, H5O_MSG_FLAG_DONTSHARE | H5O_MSG_FLAG_MARK_IF_UNKNOWN, H5O_UPDATE_TIME, &fsinfo) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTINIT, FAIL, "unable to update free-space info header message")
 	} /* end if */
     } /* end if */
@@ -1237,7 +1402,7 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
             H5_CHECKED_ASSIGN(drvinfo->len, size_t, H5FD_sb_size(f->shared->lf), hsize_t);
 
             /* Insert driver info block into cache */
-            if(H5AC_insert_entry(f, dxpl_id, H5AC_DRVRINFO, sblock->driver_addr, drvinfo, H5AC__PIN_ENTRY_FLAG | H5AC__FLUSH_LAST_FLAG | H5AC__FLUSH_COLLECTIVELY_FLAG) < 0)
+            if(H5AC_insert_entry(f, H5AC_DRVRINFO, sblock->driver_addr, drvinfo, H5AC__PIN_ENTRY_FLAG | H5AC__FLUSH_LAST_FLAG | H5AC__FLUSH_COLLECTIVELY_FLAG) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTINS, FAIL, "can't add driver info block to cache")
             drvinfo_in_cache = TRUE;
             f->shared->drvinfo = drvinfo;
@@ -1247,12 +1412,12 @@ H5F__super_init(H5F_t *f, hid_t dxpl_id)
     } /* end if */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     /* Close superblock extension, if it was created */
-    if(ext_created && H5F_super_ext_close(f, &ext_loc, dxpl_id, ext_created) < 0)
+    if(ext_created && H5F__super_ext_close(f, &ext_loc, ext_created) < 0)
         HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to close file's superblock extension")
 
     /* Cleanup on failure */
@@ -1266,7 +1431,7 @@ done:
                     HDONE_ERROR(H5E_FILE, H5E_CANTUNPIN, FAIL, "unable to unpin driver info")
 
                 /* Evict the driver info block from the cache */
-                if(H5AC_expunge_entry(f, dxpl_id, H5AC_DRVRINFO, sblock->driver_addr, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_expunge_entry(f, H5AC_DRVRINFO, sblock->driver_addr, H5AC__NO_FLAGS_SET) < 0)
                     HDONE_ERROR(H5E_FILE, H5E_CANTEXPUNGE, FAIL, "unable to expunge driver info block")
             } /* end if */
             else
@@ -1283,7 +1448,7 @@ done:
                     HDONE_ERROR(H5E_FILE, H5E_CANTUNPIN, FAIL, "unable to unpin superblock")
 
                 /* Evict the superblock from the cache */
-                if(H5AC_expunge_entry(f, dxpl_id, H5AC_SUPERBLOCK, (haddr_t)0, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_expunge_entry(f, H5AC_SUPERBLOCK, (haddr_t)0, H5AC__NO_FLAGS_SET) < 0)
                     HDONE_ERROR(H5E_FILE, H5E_CANTEXPUNGE, FAIL, "unable to expunge superblock")
             } /* end if */
             else
@@ -1296,7 +1461,7 @@ done:
         } /* end if */
     } /* end if */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5F__super_init() */
 
 
@@ -1314,7 +1479,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_eoa_dirty(H5F_t *f, hid_t dxpl_id)
+H5F_eoa_dirty(H5F_t *f)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -1338,10 +1503,9 @@ H5F_eoa_dirty(H5F_t *f, hid_t dxpl_id)
             HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark drvinfo as dirty")
     } /* end if */
     /* If the driver info is stored as a message, update that instead */
-    else if(f->shared->drvinfo_sb_msg_exists) {
-        if(H5F__update_super_ext_driver_msg(f, dxpl_id) < 0)
+    else if(f->shared->drvinfo_sb_msg_exists)
+        if(H5F__update_super_ext_driver_msg(f) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark drvinfo message as dirty")
-    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1427,9 +1591,8 @@ H5F__super_free(H5F_super_t *sblock)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F__super_size(H5F_t *f, hid_t dxpl_id, hsize_t *super_size, hsize_t *super_ext_size)
+H5F__super_size(H5F_t *f, hsize_t *super_size, hsize_t *super_ext_size)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -1455,12 +1618,11 @@ H5F__super_size(H5F_t *f, hid_t dxpl_id, hsize_t *super_size, hsize_t *super_ext
             ext_loc.file = f;
             ext_loc.addr = f->shared->sblock->ext_addr;
 
-            /* Set the ring type in the DXPL */
-            if(H5AC_set_ring(dxpl_id, H5AC_RING_SBE, &dxpl, &orig_ring) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set ring value")
+            /* Set the ring type in the API context */
+            H5AC_set_ring(H5AC_RING_SBE, &orig_ring);
 
             /* Get object header info for superblock extension */
-            if(H5O_get_hdr_info(&ext_loc, dxpl_id, &hdr_info) < 0)
+            if(H5O_get_hdr_info(&ext_loc, &hdr_info) < 0)
                 HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to retrieve superblock extension info")
 
             /* Set the superblock extension size */
@@ -1472,16 +1634,16 @@ H5F__super_size(H5F_t *f, hid_t dxpl_id, hsize_t *super_size, hsize_t *super_ext
     } /* end if */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* H5F__super_size() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_super_ext_write_msg()
+ * Function:    H5F__super_ext_write_msg()
  *
  * Purpose:     Write the message with ID to the superblock extension
  *
@@ -1492,10 +1654,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_super_ext_write_msg(H5F_t *f, hid_t dxpl_id, unsigned id, void *mesg,
+H5F__super_ext_write_msg(H5F_t *f, unsigned id, void *mesg,
     hbool_t may_create, unsigned mesg_flags)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
     hbool_t     ext_created = FALSE;   /* Whether superblock extension was created */
     hbool_t     ext_opened = FALSE;    /* Whether superblock extension was opened */
@@ -1503,25 +1664,24 @@ H5F_super_ext_write_msg(H5F_t *f, hid_t dxpl_id, unsigned id, void *mesg,
     htri_t 	status;       	/* Indicate whether the message exists or not */
     herr_t 	ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Sanity checks */
     HDassert(f);
     HDassert(f->shared);
     HDassert(f->shared->sblock);
 
-    /* Set the ring type in the DXPL */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_SBE, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set ring value")
+    /* Set the ring type in the API context */
+    H5AC_set_ring(H5AC_RING_SBE, &orig_ring);
 
     /* Open/create the superblock extension object header */
     if(H5F_addr_defined(f->shared->sblock->ext_addr)) {
-	if(H5F_super_ext_open(f, f->shared->sblock->ext_addr, &ext_loc) < 0)
-	    HGOTO_ERROR(H5E_FILE, H5E_CANTOPENOBJ, FAIL, "unable to open file's superblock extension")
+        if(H5F_super_ext_open(f, f->shared->sblock->ext_addr, &ext_loc) < 0)
+            HGOTO_ERROR(H5E_FILE, H5E_CANTOPENOBJ, FAIL, "unable to open file's superblock extension")
     } /* end if */
     else {
         HDassert(may_create);
-	if(H5F_super_ext_create(f, dxpl_id, &ext_loc) < 0)
+	if(H5F__super_ext_create(f, &ext_loc) < 0)
 	    HGOTO_ERROR(H5E_FILE, H5E_CANTCREATE, FAIL, "unable to create file's superblock extension")
         ext_created = TRUE;
     } /* end else */
@@ -1529,34 +1689,34 @@ H5F_super_ext_write_msg(H5F_t *f, hid_t dxpl_id, unsigned id, void *mesg,
     ext_opened = TRUE;
 
     /* Check if message with ID does not exist in the object header */
-    if((status = H5O_msg_exists(&ext_loc, id, dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to check object header for message or message exists")
+    if((status = H5O_msg_exists(&ext_loc, id)) < 0)
+	HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to check object header for message or message exists")
 
     /* Check for creating vs. writing */
     if(may_create) {
-	if(status)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "Message should not exist")
+        if(status)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "Message should not exist")
 
 	/* Create the message with ID in the superblock extension */
-	if(H5O_msg_create(&ext_loc, id, (mesg_flags | H5O_MSG_FLAG_DONTSHARE), H5O_UPDATE_TIME, mesg, dxpl_id) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to create the message in object header")
+	if(H5O_msg_create(&ext_loc, id, (mesg_flags | H5O_MSG_FLAG_DONTSHARE), H5O_UPDATE_TIME, mesg) < 0)
+	    HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to create the message in object header")
     } /* end if */
     else {
-	if(!status)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "Message should exist")
+        if(!status)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "Message should exist")
 
 	/* Update the message with ID in the superblock extension */
-	if(H5O_msg_write(&ext_loc, id, (mesg_flags | H5O_MSG_FLAG_DONTSHARE), H5O_UPDATE_TIME, mesg, dxpl_id) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to write the message in object header")
+	if(H5O_msg_write(&ext_loc, id, (mesg_flags | H5O_MSG_FLAG_DONTSHARE), H5O_UPDATE_TIME, mesg) < 0)
+	    HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to write the message in object header")
     } /* end else */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     /* Close the superblock extension, if it was opened */
-    if(ext_opened && H5F_super_ext_close(f, &ext_loc, dxpl_id, ext_created) < 0)
+    if(ext_opened && H5F__super_ext_close(f, &ext_loc, ext_created) < 0)
         HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to close file's superblock extension")
 
     /* Mark superblock dirty in cache, if superblock extension was created */
@@ -1564,11 +1724,11 @@ done:
         HDONE_ERROR(H5E_FILE, H5E_CANTMARKDIRTY, FAIL, "unable to mark superblock as dirty")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5F_super_ext_write_msg() */
+} /* H5F__super_ext_write_msg() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5F_super_ext_remove_msg
+ * Function:    H5F__super_ext_remove_msg
  *
  * Purpose:     Remove the message with ID from the superblock extension
  *
@@ -1579,9 +1739,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5F_super_ext_remove_msg(H5F_t *f, hid_t dxpl_id, unsigned id)
+H5F__super_ext_remove_msg(H5F_t *f, unsigned id)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
     H5O_loc_t 	ext_loc; 	/* "Object location" for superblock extension */
     hbool_t     ext_opened = FALSE;     /* Whether the superblock extension was opened */
@@ -1589,14 +1748,13 @@ H5F_super_ext_remove_msg(H5F_t *f, hid_t dxpl_id, unsigned id)
     htri_t      status;         /* Indicate whether the message exists or not */
     herr_t 	ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Make sure that the superblock extension object header exists */
     HDassert(H5F_addr_defined(f->shared->sblock->ext_addr));
 
-    /* Set the ring type in the DXPL */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_SBE, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set ring value")
+    /* Set the ring type in the API context */
+    H5AC_set_ring(H5AC_RING_SBE, &orig_ring);
 
     /* Open superblock extension object header */
     if(H5F_super_ext_open(f, f->shared->sblock->ext_addr, &ext_loc) < 0)
@@ -1604,26 +1762,26 @@ H5F_super_ext_remove_msg(H5F_t *f, hid_t dxpl_id, unsigned id)
     ext_opened = TRUE;
 
     /* Check if message with ID exists in the object header */
-    if((status = H5O_msg_exists(&ext_loc, id, dxpl_id)) < 0)
+    if((status = H5O_msg_exists(&ext_loc, id)) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to check object header for message")
     else if(status) { /* message exists */
 	H5O_hdr_info_t 	hdr_info;       /* Object header info for superblock extension */
 
 	/* Remove the message */
-	if(H5O_msg_remove(&ext_loc, id, H5O_ALL, TRUE, dxpl_id) < 0)
+	if(H5O_msg_remove(&ext_loc, id, H5O_ALL, TRUE) < 0)
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete free-space manager info message")
 
 	/* Get info for the superblock extension's object header */
-	if(H5O_get_hdr_info(&ext_loc, dxpl_id, &hdr_info) < 0)
+	if(H5O_get_hdr_info(&ext_loc, &hdr_info) < 0)
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to retrieve superblock extension info")
 
 	/* If the object header is an empty base chunk, remove superblock extension */
 	if(hdr_info.nchunks == 1) {
-	    if((null_count = H5O_msg_count(&ext_loc, H5O_NULL_ID, dxpl_id)) < 0)
+	    if((null_count = H5O_msg_count(&ext_loc, H5O_NULL_ID)) < 0)
 		HGOTO_ERROR(H5E_SYM, H5E_CANTCOUNT, FAIL, "unable to count messages")
 	    else if((unsigned)null_count == hdr_info.nmesgs) {
 		HDassert(H5F_addr_defined(ext_loc.addr));
-		if(H5O_delete(f, dxpl_id, ext_loc.addr) < 0)
+		if(H5O_delete(f, ext_loc.addr) < 0)
 		    HGOTO_ERROR(H5E_SYM, H5E_CANTCOUNT, FAIL, "unable to count messages")
 		f->shared->sblock->ext_addr = HADDR_UNDEF;
 	    } /* end if */
@@ -1631,14 +1789,14 @@ H5F_super_ext_remove_msg(H5F_t *f, hid_t dxpl_id, unsigned id)
     } /* end if */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     /* Close superblock extension object header, if opened */
-    if(ext_opened && H5F_super_ext_close(f, &ext_loc, dxpl_id, FALSE) < 0)
+    if(ext_opened && H5F__super_ext_close(f, &ext_loc, FALSE) < 0)
        HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to close file's superblock extension")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5F_super_ext_remove_msg() */
+} /* H5F__super_ext_remove_msg() */
 
diff --git a/src/H5Fsuper_cache.c b/src/H5Fsuper_cache.c
index fa893e1..76866db 100644
--- a/src/H5Fsuper_cache.c
+++ b/src/H5Fsuper_cache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Ftest.c b/src/H5Ftest.c
index e3760b7..bdecad2 100644
--- a/src/H5Ftest.c
+++ b/src/H5Ftest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -40,6 +38,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fpkg.h"             /* File access				*/
 #include "H5Gpkg.h"		/* Groups		  		*/
@@ -100,6 +99,7 @@ H5F_get_sohm_mesg_count_test(hid_t file_id, unsigned type_id,
     size_t *mesg_count)
 {
     H5F_t	*file;                  /* File info */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
@@ -108,11 +108,19 @@ H5F_get_sohm_mesg_count_test(hid_t file_id, unsigned type_id,
     if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file")
 
+    /* Push API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Retrieve count for message type */
-    if(H5SM_get_mesg_count_test(file, H5AC_ind_read_dxpl_id, type_id, mesg_count) < 0)
+    if(H5SM__get_mesg_count_test(file, type_id, mesg_count) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't retrieve shared message count")
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_FILE, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5F_get_sohm_mesg_count_test() */
 
@@ -137,6 +145,7 @@ herr_t
 H5F_check_cached_stab_test(hid_t file_id)
 {
     H5F_t	*file;                  /* File info */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
@@ -145,11 +154,19 @@ H5F_check_cached_stab_test(hid_t file_id)
     if(NULL == (file = (H5F_t *)H5I_object_verify(file_id, H5I_FILE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a file")
 
+    /* Push API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Verify the cached stab info */
     if(H5G__verify_cached_stab_test(H5G_oloc(file->shared->root_grp), file->shared->sblock->root_ent) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to verify cached symbol table info")
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_FILE, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5F_check_cached_stab_test() */
 
diff --git a/src/H5G.c b/src/H5G.c
index 1a18dc0..fa065fa 100644
--- a/src/H5G.c
+++ b/src/H5G.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -87,6 +85,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACprivate.h"	/* Metadata cache			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Gpkg.h"		/* Groups		  		*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -135,7 +134,7 @@ static const H5I_class_t H5I_GROUP_CLS[1] = {{
     H5I_GROUP,			/* ID class value */
     0,				/* Class flags */
     0,				/* # of reserved IDs for class */
-    (H5I_free_t)H5G_close	/* Callback routine for closing objects of this class */
+    (H5I_free_t)H5G__close_cb	/* Callback routine for closing objects of this class */
 }};
 
 /* Flag indicating "top" of interface has been initialized */
@@ -277,7 +276,7 @@ H5G_term_package(void)
  *				writing.  Call H5Gclose() when finished with
  *				the group.
  *
- *		Failure:	FAIL
+ *		Failure:	H5I_INVALID_HID
  *
  * Programmer:  Quincey Koziol
  *	        April 5, 2007
@@ -290,46 +289,45 @@ H5Gcreate2(hid_t loc_id, const char *name, hid_t lcpl_id, hid_t gcpl_id,
 {
     H5G_loc_t	    loc;                /* Location to create group */
     H5G_t	   *grp = NULL;         /* New group created */
-    hid_t           dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t	    ret_value;          /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE5("i", "i*siii", loc_id, name, lcpl_id, gcpl_id, gapl_id);
 
     /* Check arguments */
     if(H5G_loc(loc_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
     if(!name || !*name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "no name")
 
     /* Get correct property list */
     if(H5P_DEFAULT == lcpl_id)
         lcpl_id = H5P_LINK_CREATE_DEFAULT;
     else
         if(TRUE != H5P_isa_class(lcpl_id, H5P_LINK_CREATE))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link creation property list")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not link creation property list")
 
     /* Check group creation property list */
     if(H5P_DEFAULT == gcpl_id)
         gcpl_id = H5P_GROUP_CREATE_DEFAULT;
     else
         if(TRUE != H5P_isa_class(gcpl_id, H5P_GROUP_CREATE))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not group create property list")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not group create property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&gapl_id, H5P_CLS_GACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&gapl_id, H5P_CLS_GACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Create the new group & get its ID */
-    if(NULL == (grp = H5G__create_named(&loc, name, lcpl_id, gcpl_id, gapl_id, dxpl_id)))
-        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create group")
+    if(NULL == (grp = H5G__create_named(&loc, name, lcpl_id, gcpl_id)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5I_INVALID_HID, "unable to create group")
     if((ret_value = H5I_register(H5I_GROUP, grp, TRUE)) < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register group")
+	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register group")
 
 done:
     if(ret_value < 0)
         if(grp && H5G_close(grp) < 0)
-            HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "unable to release group")
+            HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, H5I_INVALID_HID, "unable to release group")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Gcreate2() */
@@ -363,7 +361,7 @@ done:
  *				writing.  Call H5Gclose() when finished with
  *				the group.
  *
- *		Failure:	FAIL
+ *		Failure:	H5I_INVALID_HID
  *
  * Programmer:  Peter Cao
  *	        May 08, 2005
@@ -376,26 +374,25 @@ H5Gcreate_anon(hid_t loc_id, hid_t gcpl_id, hid_t gapl_id)
     H5G_loc_t	    loc;
     H5G_t	   *grp = NULL;
     H5G_obj_create_t gcrt_info;         /* Information for group creation */
-    hid_t           dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t	    ret_value;
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "iii", loc_id, gcpl_id, gapl_id);
 
     /* Check arguments */
     if(H5G_loc(loc_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
 
     /* Check group creation property list */
     if(H5P_DEFAULT == gcpl_id)
         gcpl_id = H5P_GROUP_CREATE_DEFAULT;
     else
         if(TRUE != H5P_isa_class(gcpl_id, H5P_GROUP_CREATE))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not group create property list")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not group create property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&gapl_id, H5P_CLS_GACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&gapl_id, H5P_CLS_GACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Set up group creation info */
     gcrt_info.gcpl_id = gcpl_id;
@@ -403,10 +400,10 @@ H5Gcreate_anon(hid_t loc_id, hid_t gcpl_id, hid_t gapl_id)
     HDmemset(&gcrt_info.cache, 0, sizeof(gcrt_info.cache));
 
     /* Create the new group & get its ID */
-    if(NULL == (grp = H5G__create(loc.oloc->file, &gcrt_info, dxpl_id)))
-        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create group")
+    if(NULL == (grp = H5G__create_anon(loc.oloc->file, &gcrt_info)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5I_INVALID_HID, "unable to create group")
     if((ret_value = H5I_register(H5I_GROUP, grp, TRUE)) < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register group")
+	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register group")
 
 done:
     /* Release the group's object header, if it was created */
@@ -415,17 +412,17 @@ done:
 
         /* Get the new group's object location */
         if(NULL == (oloc = H5G_oloc(grp)))
-            HDONE_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get object location of group")
+            HDONE_ERROR(H5E_SYM, H5E_CANTGET, H5I_INVALID_HID, "unable to get object location of group")
 
         /* Decrement refcount on group's object header in memory */
-        if(H5O_dec_rc_by_loc(oloc, dxpl_id) < 0)
-           HDONE_ERROR(H5E_SYM, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
+        if(H5O_dec_rc_by_loc(oloc) < 0)
+           HDONE_ERROR(H5E_SYM, H5E_CANTDEC, H5I_INVALID_HID, "unable to decrement refcount on newly created object")
     } /* end if */
 
     /* Cleanup on failure */
     if(ret_value < 0)
         if(grp && H5G_close(grp) < 0)
-            HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "unable to release group")
+            HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, H5I_INVALID_HID, "unable to release group")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Gcreate_anon() */
@@ -441,7 +438,7 @@ done:
  *              Property List, which H5Gopen1() does not.
  *
  * Return:	Success:	Object ID of the group.
- *		Failure:	FAIL
+ *		Failure:	H5I_INVALID_HID
  *
  * Programmer:	James Laird
  *		Thursday, July 27, 2006
@@ -453,35 +450,33 @@ H5Gopen2(hid_t loc_id, const char *name, hid_t gapl_id)
 {
     H5G_t       *grp = NULL;            /* Group opened */
     H5G_loc_t	loc;                    /* Location of parent for group */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     hid_t       ret_value;              /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "i*si", loc_id, name, gapl_id);
 
     /* Check args */
     if(H5G_loc(loc_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
     if(!name || !*name)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "no name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&gapl_id, H5P_CLS_GACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&gapl_id, H5P_CLS_GACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Open the group */
-    if((grp = H5G__open_name(&loc, name, gapl_id, dxpl_id)) == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
+    if(NULL == (grp = H5G__open_name(&loc, name)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open group")
 
     /* Register an ID for the group */
     if((ret_value = H5I_register(H5I_GROUP, grp, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register group")
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register group")
 
 done:
-    if(ret_value < 0) {
+    if(ret_value < 0)
         if(grp && H5G_close(grp) < 0)
-            HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "unable to release group")
-    } /* end if */
+            HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, H5I_INVALID_HID, "unable to release group")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Gopen2() */
@@ -496,7 +491,7 @@ done:
  *				property list.  The property list ID should be
  *				released by calling H5Pclose().
  *
- *		Failure:	FAIL
+ *		Failure:	H5I_INVALID_HID
  *
  * Programmer:	Quincey Koziol
  *		Tuesday, October 25, 2005
@@ -506,18 +501,18 @@ done:
 hid_t
 H5Gget_create_plist(hid_t group_id)
 {
-    H5G_t		*group = NULL;
-    hid_t		ret_value = FAIL;
+    H5G_t	*group = NULL;
+    hid_t	ret_value = H5I_INVALID_HID;        /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE1("i", "i", group_id);
 
     /* Check args */
     if(NULL == (group = (H5G_t *)H5I_object_verify(group_id, H5I_GROUP)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a group")
 
-    if((ret_value = H5G_get_create_plist(group)) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
+    if((ret_value = H5G__get_create_plist(group)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5I_INVALID_HID, "can't get group's creation property list")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -559,7 +554,7 @@ H5Gget_info(hid_t grp_id, H5G_info_t *grp_info)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
     /* Retrieve the group's information */
-    if(H5G__obj_info(loc.oloc, grp_info/*out*/, H5AC_ind_read_dxpl_id) < 0)
+    if(H5G__get_info(&loc, grp_info/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve group info")
 
 done:
@@ -585,11 +580,6 @@ H5Gget_info_by_name(hid_t loc_id, const char *name, H5G_info_t *grp_info,
     hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Location of group */
-    H5G_loc_t   grp_loc;                /* Location used to open group */
-    H5G_name_t  grp_path;            	/* Opened object group hier. path */
-    H5O_loc_t   grp_oloc;            	/* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Location at 'name' found */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -603,28 +593,15 @@ H5Gget_info_by_name(hid_t loc_id, const char *name, H5G_info_t *grp_info,
     if(!grp_info)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up opened group location to fill in */
-    grp_loc.oloc = &grp_oloc;
-    grp_loc.path = &grp_path;
-    H5G_loc_reset(&grp_loc);
-
-    /* Find the group object */
-    if(H5G_loc_find(&loc, name, &grp_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
-    loc_found = TRUE;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Retrieve the group's information */
-    if(H5G__obj_info(grp_loc.oloc, grp_info/*out*/, dxpl_id) < 0)
+    if(H5G__get_info_by_name(&loc, name, grp_info/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve group info")
 
 done:
-    if(loc_found && H5G_loc_free(&grp_loc) < 0)
-        HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")
-
     FUNC_LEAVE_API(ret_value)
 } /* end H5Gget_info_by_name() */
 
@@ -648,11 +625,6 @@ H5Gget_info_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     H5_iter_order_t order, hsize_t n, H5G_info_t *grp_info, hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Location of group */
-    H5G_loc_t   grp_loc;                /* Location used to open group */
-    H5G_name_t  grp_path;            	/* Opened object group hier. path */
-    H5O_loc_t   grp_oloc;            	/* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -671,30 +643,15 @@ H5Gget_info_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     if(!grp_info)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up opened group location to fill in */
-    grp_loc.oloc = &grp_oloc;
-    grp_loc.path = &grp_path;
-    H5G_loc_reset(&grp_loc);
-
-    /* Find the object's location, according to the order in the index */
-    if(H5G_loc_find_by_idx(&loc, group_name, idx_type, order, n, &grp_loc/*out*/, 
-                           lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
-    loc_found = TRUE;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Retrieve the group's information */
-    if(H5G__obj_info(grp_loc.oloc, grp_info/*out*/, dxpl_id) < 0)
+    if(H5G__get_info_by_idx(&loc, group_name, idx_type, order, n, grp_info/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve group info")
 
 done:
-    /* Release the object location */
-    if(loc_found && H5G_loc_free(&grp_loc) < 0)
-        HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")
-
     FUNC_LEAVE_API(ret_value)
 } /* end H5Gget_info_by_idx() */
 
@@ -751,8 +708,8 @@ done:
 herr_t
 H5Gflush(hid_t group_id)
 {
-    H5G_t *grp;        /* Dataset for this operation */
-    herr_t ret_value = SUCCEED; /* return value */
+    H5G_t *grp;                 /* Group for this operation */
+    herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", group_id);
@@ -761,9 +718,13 @@ H5Gflush(hid_t group_id)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(group_id, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
-    /* Flush object's metadata to file */
-    if(H5O_flush_common(&grp->oloc, group_id, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTFLUSH, FAIL, "unable to flush group and object flush callback")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(group_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
+    /* Flush group's metadata to file */
+    if(H5G__flush(grp, group_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTFLUSH, FAIL, "unable to flush group")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -773,7 +734,7 @@ done:
 /*-------------------------------------------------------------------------
  * Function:    H5Grefresh
  *
- * Purpose:     Refreshes all buffers associated with a dataset.
+ * Purpose:     Refreshes all buffers associated with a group.
  *
  * Return:      Non-negative on success, negative on failure
  *
@@ -785,8 +746,8 @@ done:
 herr_t
 H5Grefresh(hid_t group_id)
 {
-    H5G_t * grp = NULL;
-    herr_t ret_value = SUCCEED; /* return value */
+    H5G_t *grp;                 /* Group for this operation */
+    herr_t ret_value = SUCCEED; /* Return value */
     
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", group_id);
@@ -795,8 +756,12 @@ H5Grefresh(hid_t group_id)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(group_id, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(group_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Call private function to refresh group object */
-    if ((H5O_refresh_metadata(group_id, grp->oloc, H5AC_ind_read_dxpl_id)) < 0)
+    if((H5G__refresh(grp, group_id)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to refresh group")
 
 done:
diff --git a/src/H5Gbtree2.c b/src/H5Gbtree2.c
index ff7e200..721d591 100644
--- a/src/H5Gbtree2.c
+++ b/src/H5Gbtree2.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -55,7 +53,6 @@
 typedef struct H5G_fh_ud_cmp_t {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     const char  *name;                  /* Name of link to compare           */
     H5B2_found_t found_op;              /* Callback when correct link is found */
     void        *found_op_data;         /* Callback data when correct link is found */
@@ -157,7 +154,7 @@ const H5B2_class_t H5G_BT2_CORDER[1]={{ /* B-tree class information */
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_fh_name_cmp(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5G_dense_fh_name_cmp(const void *obj, size_t obj_len, void *_udata)
 {
     H5G_fh_ud_cmp_t *udata = (H5G_fh_ud_cmp_t *)_udata;         /* User data for 'op' callback */
     H5O_link_t *lnk;    /* Pointer to link created from heap object */
@@ -166,7 +163,7 @@ H5G_dense_fh_name_cmp(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_uda
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Decode link information */
-    if(NULL == (lnk = (H5O_link_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_LINK_ID, (const unsigned char *)obj)))
+    if(NULL == (lnk = (H5O_link_t *)H5O_msg_decode(udata->f, NULL, H5O_LINK_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, FAIL, "can't decode link")
 
     /* Compare the string values */
@@ -266,7 +263,6 @@ for(u = 0; u < H5G_DENSE_FHEAP_ID_LEN; u++)
         /* Prepare user data for callback */
         /* down */
         fh_udata.f = bt2_udata->f;
-        fh_udata.dxpl_id = bt2_udata->dxpl_id;
         fh_udata.name = bt2_udata->name;
         fh_udata.found_op = bt2_udata->found_op;
         fh_udata.found_op_data = bt2_udata->found_op_data;
@@ -275,8 +271,7 @@ for(u = 0; u < H5G_DENSE_FHEAP_ID_LEN; u++)
         fh_udata.cmp = 0;
 
         /* Check if the user's link and the B-tree's link have the same name */
-        if(H5HF_op(bt2_udata->fheap, bt2_udata->dxpl_id, bt2_rec->id,
-                   H5G_dense_fh_name_cmp, &fh_udata) < 0)
+        if(H5HF_op(bt2_udata->fheap, bt2_rec->id, H5G_dense_fh_name_cmp, &fh_udata) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
 
         /* Callback will set comparison value */
diff --git a/src/H5Gcache.c b/src/H5Gcache.c
index d153560..b447cad 100644
--- a/src/H5Gcache.c
+++ b/src/H5Gcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -172,6 +170,7 @@ H5G__cache_node_deserialize(const void *_image, size_t len, void *_udata,
     H5F_t                  *f = (H5F_t *)_udata;        /* User data for callback */
     H5G_node_t             *sym = NULL; /* Symbol table node created */
     const uint8_t          *image = (const uint8_t *)_image;    /* Pointer to image to deserialize */
+    const uint8_t          *image_end = image + len - 1;        /* Pointer to end of image buffer */
     void                   *ret_value = NULL;   /* Return value */
 
     FUNC_ENTER_STATIC
@@ -205,7 +204,7 @@ H5G__cache_node_deserialize(const void *_image, size_t len, void *_udata,
     UINT16DECODE(image, sym->nsyms);
 
     /* entries */
-    if(H5G__ent_decode_vec(f, &image, sym->entry, sym->nsyms) < 0)
+    if(H5G__ent_decode_vec(f, &image, image_end, sym->entry, sym->nsyms) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, NULL, "unable to decode symbol table entries")
 
     /* Set return value */
diff --git a/src/H5Gcompact.c b/src/H5Gcompact.c
index 41ca4f5..aae5496 100644
--- a/src/H5Gcompact.c
+++ b/src/H5Gcompact.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -44,7 +42,6 @@ typedef struct {
 typedef struct {
     /* downward */
     H5F_t       *file;          /* File that object header is located within */
-    hid_t       dxpl_id;        /* DXPL during insertion */
     H5RS_str_t *grp_full_path_r;/* Full path for group of link */
     const char *name;           /* Link name to search for */
 } H5G_iter_rm_t;
@@ -63,7 +60,7 @@ typedef struct {
 
 /* PRIVATE PROTOTYPES */
 static herr_t H5G_compact_build_table_cb(const void *_mesg, unsigned idx, void *_udata);
-static herr_t H5G_compact_build_table(const H5O_loc_t *oloc, hid_t dxpl_id,
+static herr_t H5G__compact_build_table(const H5O_loc_t *oloc, 
     const H5O_linfo_t *linfo, H5_index_t idx_type, H5_iter_order_t order,
     H5G_link_table_t *ltable);
 
@@ -109,7 +106,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_compact_build_table
+ * Function:	H5G__compact_build_table
  *
  * Purpose:     Builds a table containing a sorted (alphabetically) list of
  *              links for a group
@@ -123,12 +120,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_compact_build_table(const H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5G__compact_build_table(const H5O_loc_t *oloc, const H5O_linfo_t *linfo,
     H5_index_t idx_type, H5_iter_order_t order, H5G_link_table_t *ltable)
 {
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(oloc);
@@ -155,7 +152,7 @@ H5G_compact_build_table(const H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t
         /* Iterate through the link messages, adding them to the table */
         op.op_type = H5O_MESG_OP_APP;
         op.u.app_op = H5G_compact_build_table_cb;
-        if(H5O_msg_iterate(oloc, H5O_LINK_ID, &op, &udata, dxpl_id) < 0)
+        if(H5O_msg_iterate(oloc, H5O_LINK_ID, &op, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "error iterating over link messages")
 
         /* Sort link table in correct iteration order */
@@ -167,7 +164,7 @@ H5G_compact_build_table(const H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_compact_build_table() */
+} /* end H5G__compact_build_table() */
 
 
 /*-------------------------------------------------------------------------
@@ -186,8 +183,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__compact_insert(const H5O_loc_t *grp_oloc, H5O_link_t *obj_lnk,
-    hid_t dxpl_id)
+H5G__compact_insert(const H5O_loc_t *grp_oloc, H5O_link_t *obj_lnk)
 {
     herr_t     ret_value = SUCCEED;       /* Return value */
 
@@ -198,7 +194,7 @@ H5G__compact_insert(const H5O_loc_t *grp_oloc, H5O_link_t *obj_lnk,
     HDassert(obj_lnk);
 
     /* Insert link message into group */
-    if(H5O_msg_create(grp_oloc, H5O_LINK_ID, 0, H5O_UPDATE_TIME, obj_lnk, dxpl_id) < 0)
+    if(H5O_msg_create(grp_oloc, H5O_LINK_ID, 0, H5O_UPDATE_TIME, obj_lnk) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
 
 done:
@@ -220,9 +216,9 @@ done:
  *-------------------------------------------------------------------------
  */
 ssize_t
-H5G__compact_get_name_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
-    const H5O_linfo_t *linfo, H5_index_t idx_type, H5_iter_order_t order,
-    hsize_t idx, char* name, size_t size)
+H5G__compact_get_name_by_idx(const H5O_loc_t *oloc, const H5O_linfo_t *linfo,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t idx, char* name,
+    size_t size)
 {
     H5G_link_table_t    ltable = {0, NULL};     /* Link table */
     ssize_t		ret_value = -1;         /* Return value */
@@ -233,7 +229,7 @@ H5G__compact_get_name_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
     HDassert(oloc);
 
     /* Build table of all link messages */
-    if(H5G_compact_build_table(oloc, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+    if(H5G__compact_build_table(oloc, linfo, idx_type, order, &ltable) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create link message table")
 
     /* Check for going out of bounds */
@@ -289,7 +285,7 @@ H5G_compact_remove_common_cb(const void *_mesg, unsigned H5_ATTR_UNUSED idx, voi
     /* If we've found the right link, get the object type */
     if(HDstrcmp(lnk->name, udata->name) == 0) {
         /* Replace path names for link being removed */
-        if(H5G__link_name_replace(udata->file, udata->dxpl_id, udata->grp_full_path_r, lnk) < 0)
+        if(H5G__link_name_replace(udata->file, udata->grp_full_path_r, lnk) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5_ITER_ERROR, "unable to get object type")
 
         /* Stop the iteration, we found the correct link */
@@ -314,7 +310,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__compact_remove(const H5O_loc_t *oloc, hid_t dxpl_id, H5RS_str_t *grp_full_path_r,
+H5G__compact_remove(const H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r,
     const char *name)
 {
     H5G_iter_rm_t udata;               /* Data to pass through OH iteration */
@@ -327,12 +323,11 @@ H5G__compact_remove(const H5O_loc_t *oloc, hid_t dxpl_id, H5RS_str_t *grp_full_p
 
     /* Initialize data to pass through object header iteration */
     udata.file = oloc->file;
-    udata.dxpl_id = dxpl_id;
     udata.grp_full_path_r = grp_full_path_r;
     udata.name = name;
 
     /* Iterate over the link messages to delete the right one */
-    if(H5O_msg_remove_op(oloc, H5O_LINK_ID, H5O_FIRST, H5G_compact_remove_common_cb, &udata, TRUE, dxpl_id) < 0)
+    if(H5O_msg_remove_op(oloc, H5O_LINK_ID, H5O_FIRST, H5G_compact_remove_common_cb, &udata, TRUE) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete link message")
 
 done:
@@ -353,9 +348,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__compact_remove_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
-    const H5O_linfo_t *linfo, H5RS_str_t *grp_full_path_r, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n)
+H5G__compact_remove_by_idx(const H5O_loc_t *oloc, const H5O_linfo_t *linfo,
+    H5RS_str_t *grp_full_path_r, H5_index_t idx_type, H5_iter_order_t order,
+    hsize_t n)
 {
     H5G_link_table_t ltable = {0, NULL};/* Link table */
     H5G_iter_rm_t udata;                /* Data to pass through OH iteration */
@@ -367,7 +362,7 @@ H5G__compact_remove_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
     HDassert(linfo);
 
     /* Build table of all link messages, sorted according to desired order */
-    if(H5G_compact_build_table(oloc, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+    if(H5G__compact_build_table(oloc, linfo, idx_type, order, &ltable) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create link message table")
 
     /* Check for going out of bounds */
@@ -376,12 +371,11 @@ H5G__compact_remove_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
 
     /* Initialize data to pass through object header iteration */
     udata.file = oloc->file;
-    udata.dxpl_id = dxpl_id;
     udata.grp_full_path_r = grp_full_path_r;
     udata.name = ltable.lnks[n].name;
 
     /* Iterate over the link messages to delete the right one */
-    if(H5O_msg_remove_op(oloc, H5O_LINK_ID, H5O_FIRST, H5G_compact_remove_common_cb, &udata, TRUE, dxpl_id) < 0)
+    if(H5O_msg_remove_op(oloc, H5O_LINK_ID, H5O_FIRST, H5G_compact_remove_common_cb, &udata, TRUE) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete link message")
 
 done:
@@ -406,7 +400,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__compact_iterate(const H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5G__compact_iterate(const H5O_loc_t *oloc, const H5O_linfo_t *linfo,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
     H5G_lib_iterate_t op, void *op_data)
 {
@@ -421,7 +415,7 @@ H5G__compact_iterate(const H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *li
     HDassert(op);
 
     /* Build table of all link messages */
-    if(H5G_compact_build_table(oloc, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+    if(H5G__compact_build_table(oloc, linfo, idx_type, order, &ltable) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create link message table")
 
     /* Iterate over links in table */
@@ -498,8 +492,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5G__compact_lookup(const H5O_loc_t *oloc, const char *name, H5O_link_t *lnk,
-    hid_t dxpl_id)
+H5G__compact_lookup(const H5O_loc_t *oloc, const char *name, H5O_link_t *lnk)
 {
     H5G_iter_lkp_t udata;               /* User data for iteration callback */
     H5O_mesg_operator_t op;             /* Message operator */
@@ -519,7 +512,7 @@ H5G__compact_lookup(const H5O_loc_t *oloc, const char *name, H5O_link_t *lnk,
     /* Iterate through the link messages, adding them to the table */
     op.op_type = H5O_MESG_OP_APP;
     op.u.app_op = H5G_compact_lookup_cb;
-    if(H5O_msg_iterate(oloc, H5O_LINK_ID, &op, &udata, dxpl_id) < 0)
+    if(H5O_msg_iterate(oloc, H5O_LINK_ID, &op, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "error iterating over link messages")
 
     /* Determine if we found the link we were looking for */
@@ -545,7 +538,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__compact_lookup_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5G__compact_lookup_by_idx(const H5O_loc_t *oloc, const H5O_linfo_t *linfo,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t n, H5O_link_t *lnk)
 {
     H5G_link_table_t ltable = {0, NULL};/* Link table */
@@ -559,7 +552,7 @@ H5G__compact_lookup_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo
     HDassert(lnk);
 
     /* Build table of all link messages, sorted according to desired order */
-    if(H5G_compact_build_table(oloc, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+    if(H5G__compact_build_table(oloc, linfo, idx_type, order, &ltable) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create link message table")
 
     /* Check for going out of bounds */
@@ -594,7 +587,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5G_obj_t
-H5G__compact_get_type_by_idx(H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5G__compact_get_type_by_idx(H5O_loc_t *oloc, const H5O_linfo_t *linfo,
     hsize_t idx)
 {
     H5G_link_table_t    ltable = {0, NULL};         /* Link table */
@@ -606,7 +599,7 @@ H5G__compact_get_type_by_idx(H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *
     HDassert(oloc);
 
     /* Build table of all link messages */
-    if(H5G_compact_build_table(oloc, dxpl_id, linfo, H5_INDEX_NAME, H5_ITER_INC, &ltable) < 0)
+    if(H5G__compact_build_table(oloc, linfo, H5_INDEX_NAME, H5_ITER_INC, &ltable) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5G_UNKNOWN, "can't create link message table")
 
     /* Check for going out of bounds */
@@ -627,7 +620,7 @@ H5G__compact_get_type_by_idx(H5O_loc_t *oloc, hid_t dxpl_id, const H5O_linfo_t *
         tmp_oloc.addr = ltable.lnks[idx].u.hard.addr;
 
         /* Get the type of the object */
-        if(H5O_obj_type(&tmp_oloc, &obj_type, dxpl_id) < 0)
+        if(H5O_obj_type(&tmp_oloc, &obj_type) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5G_UNKNOWN, "can't get object type")
 
         /* Map to group object type */
diff --git a/src/H5Gdense.c b/src/H5Gdense.c
index e8fa237..326561a 100644
--- a/src/H5Gdense.c
+++ b/src/H5Gdense.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -85,7 +83,6 @@ typedef struct {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
     hsize_t     count;                  /* # of links examined               */
 
@@ -105,7 +102,6 @@ typedef struct {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
 
     /* upward */
     H5O_link_t  *lnk;                   /* Copy of link                      */
@@ -131,7 +127,6 @@ typedef struct {
 typedef struct {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     haddr_t     corder_bt2_addr;        /* Address of v2 B-tree indexing creation order */
     H5RS_str_t *grp_full_path_r;        /* Full path of group where link is removed */
     hbool_t     replace_names;          /* Whether to replace the names of open objects */
@@ -144,7 +139,6 @@ typedef struct {
 typedef struct {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
     H5_index_t idx_type;                /* Primary index for removing link */
     haddr_t     other_bt2_addr;         /* Address of "other" v2 B-tree indexing link */
@@ -158,7 +152,6 @@ typedef struct {
 typedef struct {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
 
     /* upward */
     H5O_link_t *lnk;                    /* Pointer to link to remove */
@@ -171,7 +164,6 @@ typedef struct {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
 
     /* downward (from application) */
@@ -189,7 +181,6 @@ typedef struct {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
 
     /* downward (from application) */
     char        *name;                  /* Name buffer to fill               */
@@ -206,7 +197,6 @@ typedef struct {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
 
     /* upward */
@@ -220,7 +210,6 @@ typedef struct {
 typedef struct {
     /* downward (internal) */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
 
     /* upward */
     H5O_link_t  *lnk;                   /* Pointer to link                   */
@@ -267,8 +256,7 @@ typedef struct {
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_create(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
-    const H5O_pline_t *pline)
+H5G__dense_create(H5F_t *f, H5O_linfo_t *linfo, const H5O_pline_t *pline)
 {
     H5HF_create_t fheap_cparam;         /* Fractal heap creation parameters */
     H5B2_create_t bt2_cparam;           /* v2 B-tree creation parameters */
@@ -300,7 +288,7 @@ H5G__dense_create(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
         fheap_cparam.pline = *pline;
 
     /* Create fractal heap for storing links */
-    if(NULL == (fheap = H5HF_create(f, dxpl_id, &fheap_cparam)))
+    if(NULL == (fheap = H5HF_create(f, &fheap_cparam)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create fractal heap")
 
     /* Retrieve the heap's address in the file */
@@ -327,7 +315,7 @@ HDfprintf(stderr, "%s: fheap_id_len = %Zu\n", FUNC, fheap_id_len);
             (uint32_t)fheap_id_len;     /* Fractal heap ID */
     bt2_cparam.split_percent = H5G_NAME_BT2_SPLIT_PERC;
     bt2_cparam.merge_percent = H5G_NAME_BT2_MERGE_PERC;
-    if(NULL == (bt2_name = H5B2_create(f, dxpl_id, &bt2_cparam, NULL)))
+    if(NULL == (bt2_name = H5B2_create(f, &bt2_cparam, NULL)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create v2 B-tree for name index")
 
     /* Retrieve the v2 B-tree's address in the file */
@@ -348,7 +336,7 @@ HDfprintf(stderr, "%s: linfo->name_bt2_addr = %a\n", FUNC, linfo->name_bt2_addr)
                 (uint32_t)fheap_id_len;         /* Fractal heap ID */
         bt2_cparam.split_percent = H5G_CORDER_BT2_SPLIT_PERC;
         bt2_cparam.merge_percent = H5G_CORDER_BT2_MERGE_PERC;
-        if(NULL == (bt2_corder = H5B2_create(f, dxpl_id, &bt2_cparam, NULL)))
+        if(NULL == (bt2_corder = H5B2_create(f, &bt2_cparam, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create v2 B-tree for creation order index")
 
         /* Retrieve the v2 B-tree's address in the file */
@@ -361,11 +349,11 @@ HDfprintf(stderr, "%s: linfo->corder_bt2_addr = %a\n", FUNC, linfo->corder_bt2_a
 
 done:
     /* Close the open objects */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for creation order index")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -386,8 +374,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_insert(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
-    const H5O_link_t *lnk)
+H5G__dense_insert(H5F_t *f, const H5O_linfo_t *linfo, const H5O_link_t *lnk)
 {
     H5G_bt2_ud_ins_t udata;             /* User data for v2 B-tree insertion */
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
@@ -432,20 +419,19 @@ HDfprintf(stderr, "%s: HDstrlen(lnk->name) = %Zu, link_size = %Zu\n", FUNC, HDst
 	HGOTO_ERROR(H5E_SYM, H5E_CANTENCODE, FAIL, "can't encode link")
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Insert the serialized link into the fractal heap */
-    if(H5HF_insert(fheap, dxpl_id, link_size, link_ptr, udata.id) < 0)
+    if(H5HF_insert(fheap, link_size, link_ptr, udata.id) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link into fractal heap")
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, linfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, linfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Create the callback information for v2 B-tree record insertion */
     udata.common.f = f;
-    udata.common.dxpl_id = dxpl_id;
     udata.common.fheap = fheap;
     udata.common.name = lnk->name;
     udata.common.name_hash = H5_checksum_lookup3(lnk->name, HDstrlen(lnk->name), 0);
@@ -455,28 +441,28 @@ HDfprintf(stderr, "%s: HDstrlen(lnk->name) = %Zu, link_size = %Zu\n", FUNC, HDst
     /* udata.id already set in H5HF_insert() call */
 
     /* Insert link into 'name' tracking v2 B-tree */
-    if(H5B2_insert(bt2_name, dxpl_id, &udata) < 0)
+    if(H5B2_insert(bt2_name, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert record into v2 B-tree")
 
     /* Check if we should create a creation order index v2 B-tree record */
     if(linfo->index_corder) {
         /* Open the creation order index v2 B-tree */
         HDassert(H5F_addr_defined(linfo->corder_bt2_addr));
-        if(NULL == (bt2_corder = H5B2_open(f, dxpl_id, linfo->corder_bt2_addr, NULL)))
+        if(NULL == (bt2_corder = H5B2_open(f, linfo->corder_bt2_addr, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
         /* Insert the record into the creation order index v2 B-tree */
-        if(H5B2_insert(bt2_corder, dxpl_id, &udata) < 0)
+        if(H5B2_insert(bt2_corder, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert record into v2 B-tree")
     } /* end if */
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for creation order index")
     if(wb && H5WB_unwrap(wb) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close wrapped buffer")
@@ -536,8 +522,8 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5G__dense_lookup(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
-    const char *name, H5O_link_t *lnk)
+H5G__dense_lookup(H5F_t *f, const H5O_linfo_t *linfo, const char *name,
+    H5O_link_t *lnk)
 {
     H5G_bt2_ud_common_t udata;          /* User data for v2 B-tree link lookup */
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
@@ -555,16 +541,15 @@ H5G__dense_lookup(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
     HDassert(lnk);
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(f, dxpl_id, linfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(f, linfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Construct the user data for v2 B-tree callback */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.fheap = fheap;
     udata.name = name;
     udata.name_hash = H5_checksum_lookup3(name, HDstrlen(name), 0);
@@ -572,14 +557,14 @@ H5G__dense_lookup(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
     udata.found_op_data = lnk;
 
     /* Find & copy the named link in the 'name' index */
-    if((ret_value = H5B2_find(bt2_name, dxpl_id, &udata, NULL, NULL)) < 0)
+    if((ret_value = H5B2_find(bt2_name, &udata, NULL, NULL)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to locate link in name index")
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -601,7 +586,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_lookup_by_idx_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5G_dense_lookup_by_idx_fh_cb(const void *obj, size_t obj_len, void *_udata)
 {
     H5G_fh_ud_lbi_t *udata = (H5G_fh_ud_lbi_t *)_udata;       /* User data for fractal heap 'op' callback */
     H5O_link_t *tmp_lnk = NULL;         /* Temporary pointer to link */
@@ -610,7 +595,7 @@ H5G_dense_lookup_by_idx_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, vo
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Decode link information & keep a copy */
-    if(NULL == (tmp_lnk = (H5O_link_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_LINK_ID, (const unsigned char *)obj)))
+    if(NULL == (tmp_lnk = (H5O_link_t *)H5O_msg_decode(udata->f, NULL, H5O_LINK_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, FAIL, "can't decode link")
 
     /* Copy link information */
@@ -652,12 +637,10 @@ H5G_dense_lookup_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
     /* Prepare user data for callback */
     /* down */
     fh_udata.f = bt2_udata->f;
-    fh_udata.dxpl_id = bt2_udata->dxpl_id;
     fh_udata.lnk = bt2_udata->lnk;
 
     /* Call fractal heap 'op' routine, to copy the link information */
-    if(H5HF_op(bt2_udata->fheap, bt2_udata->dxpl_id, record->id,
-            H5G_dense_lookup_by_idx_fh_cb, &fh_udata) < 0)
+    if(H5HF_op(bt2_udata->fheap, record->id, H5G_dense_lookup_by_idx_fh_cb, &fh_udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPERATE, H5_ITER_ERROR, "link found callback failed")
 
 done:
@@ -680,7 +663,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_lookup_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5G__dense_lookup_by_idx(H5F_t *f, const H5O_linfo_t *linfo,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t n, H5O_link_t *lnk)
 {
     H5HF_t *fheap = NULL;                     /* Fractal heap handle */
@@ -731,26 +714,25 @@ H5G__dense_lookup_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
         H5G_bt2_ud_lbi_t udata;        /* User data for v2 B-tree link lookup */
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(f, bt2_addr, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for index")
 
         /* Construct the user data for v2 B-tree callback */
         udata.f = f;
-        udata.dxpl_id = dxpl_id;
         udata.fheap = fheap;
         udata.lnk = lnk;
 
         /* Find & copy the link in the appropriate index */
-        if(H5B2_index(bt2, dxpl_id, order, n, H5G_dense_lookup_by_idx_bt2_cb, &udata) < 0)
+        if(H5B2_index(bt2, order, n, H5G_dense_lookup_by_idx_bt2_cb, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to locate link in index")
     } /* end if */
     else {      /* Otherwise, we need to build a table of the links and sort it */
         /* Build the table of links for this group */
-        if(H5G__dense_build_table(f, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+        if(H5G__dense_build_table(f, linfo, idx_type, order, &ltable) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "error building table of links")
 
         /* Check for going out of bounds */
@@ -764,9 +746,9 @@ H5G__dense_lookup_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for index")
     if(ltable.lnks && H5G__link_release_table(&ltable) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to release link table")
@@ -832,8 +814,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
-    H5_index_t idx_type, H5_iter_order_t order, H5G_link_table_t *ltable)
+H5G__dense_build_table(H5F_t *f, const H5O_linfo_t *linfo, H5_index_t idx_type,
+    H5_iter_order_t order, H5G_link_table_t *ltable)
 {
     herr_t	ret_value = SUCCEED;    /* Return value */
 
@@ -861,7 +843,7 @@ H5G__dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
         udata.curr_lnk = 0;
 
         /* Iterate over the links in the group, building a table of the link messages */
-        if(H5G__dense_iterate(f, dxpl_id, linfo, H5_INDEX_NAME, H5_ITER_NATIVE, (hsize_t)0, NULL, H5G_dense_build_table_cb, &udata) < 0)
+        if(H5G__dense_iterate(f, linfo, H5_INDEX_NAME, H5_ITER_NATIVE, (hsize_t)0, NULL, H5G_dense_build_table_cb, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over links")
 
         /* Sort link table in correct iteration order */
@@ -891,7 +873,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_iterate_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5G_dense_iterate_fh_cb(const void *obj, size_t obj_len, void *_udata)
 {
     H5G_fh_ud_it_t *udata = (H5G_fh_ud_it_t *)_udata;       /* User data for fractal heap 'op' callback */
     herr_t ret_value = SUCCEED;   /* Return value */
@@ -905,7 +887,7 @@ H5G_dense_iterate_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_u
      *  HDF5 routine, it could attempt to re-protect that direct block for the
      *  heap, causing the HDF5 routine called to fail - QAK)
      */
-    if(NULL == (udata->lnk = (H5O_link_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_LINK_ID, (const unsigned char *)obj)))
+    if(NULL == (udata->lnk = (H5O_link_t *)H5O_msg_decode(udata->f, NULL, H5O_LINK_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, FAIL, "can't decode link")
 
 done:
@@ -944,11 +926,9 @@ H5G_dense_iterate_bt2_cb(const void *_record, void *_bt2_udata)
         /* Prepare user data for callback */
         /* down */
         fh_udata.f = bt2_udata->f;
-        fh_udata.dxpl_id = bt2_udata->dxpl_id;
 
         /* Call fractal heap 'op' routine, to copy the link information */
-        if(H5HF_op(bt2_udata->fheap, bt2_udata->dxpl_id, record->id,
-                H5G_dense_iterate_fh_cb, &fh_udata) < 0)
+        if(H5HF_op(bt2_udata->fheap, record->id, H5G_dense_iterate_fh_cb, &fh_udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPERATE, H5_ITER_ERROR, "heap op callback failed")
 
         /* Make the callback */
@@ -985,9 +965,9 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_iterate(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
-    H5G_lib_iterate_t op, void *op_data)
+H5G__dense_iterate(H5F_t *f, const H5O_linfo_t *linfo, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk, H5G_lib_iterate_t op,
+    void *op_data)
 {
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
     H5G_link_table_t ltable = {0, NULL};      /* Table of links */
@@ -1040,16 +1020,15 @@ H5G__dense_iterate(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
         HDassert(H5F_addr_defined(bt2_addr));
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(f, bt2_addr, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for index")
 
         /* Construct the user data for v2 B-tree iterator callback */
         udata.f = f;
-        udata.dxpl_id = dxpl_id;
         udata.fheap = fheap;
         udata.skip = skip;
         udata.count = 0;
@@ -1058,7 +1037,7 @@ H5G__dense_iterate(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
 
         /* Iterate over the records in the v2 B-tree's "native" order */
         /* (by hash of name) */
-        if((ret_value = H5B2_iterate(bt2, dxpl_id, H5G_dense_iterate_bt2_cb, &udata)) < 0)
+        if((ret_value = H5B2_iterate(bt2, H5G_dense_iterate_bt2_cb, &udata)) < 0)
             HERROR(H5E_SYM, H5E_BADITER, "link iteration failed");
 
         /* Update the last link examined, if requested */
@@ -1067,7 +1046,7 @@ H5G__dense_iterate(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
     } /* end if */
     else {
         /* Build the table of links for this group */
-        if(H5G__dense_build_table(f, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+        if(H5G__dense_build_table(f, linfo, idx_type, order, &ltable) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "error building table of links")
 
         /* Iterate over links in table */
@@ -1077,9 +1056,9 @@ H5G__dense_iterate(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for index")
     if(ltable.lnks && H5G__link_release_table(&ltable) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to release link table")
@@ -1103,7 +1082,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_get_name_by_idx_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5G_dense_get_name_by_idx_fh_cb(const void *obj, size_t obj_len, void *_udata)
 {
     H5G_fh_ud_gnbi_t *udata = (H5G_fh_ud_gnbi_t *)_udata;       /* User data for fractal heap 'op' callback */
     H5O_link_t *lnk;            /* Pointer to link created from heap object */
@@ -1112,7 +1091,7 @@ H5G_dense_get_name_by_idx_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len,
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Decode link information */
-    if(NULL == (lnk = (H5O_link_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_LINK_ID, (const unsigned char *)obj)))
+    if(NULL == (lnk = (H5O_link_t *)H5O_msg_decode(udata->f, NULL, H5O_LINK_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, FAIL, "can't decode link")
 
     /* Get the length of the name */
@@ -1159,13 +1138,11 @@ H5G_dense_get_name_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
     /* Prepare user data for callback */
     /* down */
     fh_udata.f = bt2_udata->f;
-    fh_udata.dxpl_id = bt2_udata->dxpl_id;
     fh_udata.name = bt2_udata->name;
     fh_udata.name_size = bt2_udata->name_size;
 
     /* Call fractal heap 'op' routine, to perform user callback */
-    if(H5HF_op(bt2_udata->fheap, bt2_udata->dxpl_id, record->id,
-            H5G_dense_get_name_by_idx_fh_cb, &fh_udata) < 0)
+    if(H5HF_op(bt2_udata->fheap, record->id, H5G_dense_get_name_by_idx_fh_cb, &fh_udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPERATE, FAIL, "link found callback failed")
 
     /* Set the name's full length to return */
@@ -1191,9 +1168,8 @@ done:
  *-------------------------------------------------------------------------
  */
 ssize_t
-H5G__dense_get_name_by_idx(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, char *name,
-    size_t size)
+H5G__dense_get_name_by_idx(H5F_t *f, H5O_linfo_t *linfo, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n, char *name, size_t size)
 {
     H5HF_t *fheap = NULL;       /* Fractal heap handle */
     H5G_link_table_t ltable = {0, NULL};      /* Table of links */
@@ -1242,22 +1218,21 @@ H5G__dense_get_name_by_idx(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
         H5G_bt2_ud_gnbi_t udata;       /* User data for v2 B-tree callback */
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(f, bt2_addr, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for index")
 
         /* Set up the user data for the v2 B-tree 'record remove' callback */
         udata.f = f;
-        udata.dxpl_id = dxpl_id;
         udata.fheap = fheap;
         udata.name = name;
         udata.name_size = size;
 
         /* Retrieve the name according to the v2 B-tree's index order */
-        if(H5B2_index(bt2, dxpl_id, order, n, H5G_dense_get_name_by_idx_bt2_cb, &udata) < 0)
+        if(H5B2_index(bt2, order, n, H5G_dense_get_name_by_idx_bt2_cb, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTLIST, FAIL, "can't locate object in v2 B-tree")
 
         /* Set return value */
@@ -1265,7 +1240,7 @@ H5G__dense_get_name_by_idx(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
     } /* end if */
     else {      /* Otherwise, we need to build a table of the links and sort it */
         /* Build the table of links for this group */
-        if(H5G__dense_build_table(f, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+        if(H5G__dense_build_table(f, linfo, idx_type, order, &ltable) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "error building table of links")
 
         /* Check for going out of bounds */
@@ -1285,9 +1260,9 @@ H5G__dense_get_name_by_idx(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for index")
     if(ltable.lnks && H5G__link_release_table(&ltable) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to release link table")
@@ -1310,7 +1285,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_remove_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5G_dense_remove_fh_cb(const void *obj, size_t obj_len, void *_udata)
 {
     H5G_fh_ud_rm_t *udata = (H5G_fh_ud_rm_t *)_udata;       /* User data for fractal heap 'op' callback */
     H5O_link_t *lnk = NULL;             /* Pointer to link created from heap object */
@@ -1320,7 +1295,7 @@ H5G_dense_remove_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_ud
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Decode link information */
-    if(NULL == (lnk = (H5O_link_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_LINK_ID, (const unsigned char *)obj)))
+    if(NULL == (lnk = (H5O_link_t *)H5O_msg_decode(udata->f, NULL, H5O_LINK_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, FAIL, "can't decode link")
 
     /* Check for removing the link from the creation order index */
@@ -1328,7 +1303,7 @@ H5G_dense_remove_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_ud
         H5G_bt2_ud_common_t bt2_udata;         /* Info for B-tree callbacks */
 
         /* Open the creation order index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(udata->f, udata->dxpl_id, udata->corder_bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(udata->f, udata->corder_bt2_addr, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
         /* Set up the user data for the v2 B-tree 'record remove' callback */
@@ -1336,23 +1311,23 @@ H5G_dense_remove_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_ud
         bt2_udata.corder = lnk->corder;
 
         /* Remove the record from the name index v2 B-tree */
-        if(H5B2_remove(bt2, udata->dxpl_id, &bt2_udata, NULL, NULL) < 0)
+        if(H5B2_remove(bt2, &bt2_udata, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, FAIL, "unable to remove link from creation order index v2 B-tree")
     } /* end if */
 
     /* Replace open objects' names, if requested */
     if(udata->replace_names)
-        if(H5G__link_name_replace(udata->f, udata->dxpl_id, udata->grp_full_path_r, lnk) < 0)
+        if(H5G__link_name_replace(udata->f, udata->grp_full_path_r, lnk) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTRENAME, FAIL, "unable to rename open objects")
 
     /* Perform the deletion action on the link, if requested */
     /* (call message "delete" callback directly: *ick* - QAK) */
-    if(H5O_link_delete(udata->f, udata->dxpl_id, NULL, lnk) < 0)
+    if(H5O_link_delete(udata->f, NULL, lnk) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete link")
 
 done:
     /* Release resources */
-    if(bt2 && H5B2_close(bt2, udata->dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for creation order index")
     if(lnk)
         H5O_msg_free(H5O_LINK_ID, lnk);
@@ -1386,19 +1361,17 @@ H5G_dense_remove_bt2_cb(const void *_record, void *_bt2_udata)
 
     /* Set up the user data for fractal heap 'op' callback */
     fh_udata.f = bt2_udata->common.f;
-    fh_udata.dxpl_id = bt2_udata->common.dxpl_id;
     fh_udata.corder_bt2_addr = bt2_udata->corder_bt2_addr;
     fh_udata.grp_full_path_r = bt2_udata->grp_full_path_r;
     fh_udata.replace_names = bt2_udata->replace_names;
 
     /* Call fractal heap 'op' routine, to perform user callback */
-    if(H5HF_op(bt2_udata->common.fheap, bt2_udata->common.dxpl_id, record->id,
-            H5G_dense_remove_fh_cb, &fh_udata) < 0)
+    if(H5HF_op(bt2_udata->common.fheap, record->id, H5G_dense_remove_fh_cb, &fh_udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPERATE, FAIL, "link removal callback failed")
 
     /* Remove record from fractal heap, if requested */
     if(bt2_udata->rem_from_fheap)
-        if(H5HF_remove(bt2_udata->common.fheap, bt2_udata->common.dxpl_id, record->id) < 0)
+        if(H5HF_remove(bt2_udata->common.fheap, record->id) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, FAIL, "unable to remove link from fractal heap")
 
 done:
@@ -1420,8 +1393,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
-    H5RS_str_t *grp_full_path_r, const char *name)
+H5G__dense_remove(H5F_t *f, const H5O_linfo_t *linfo, H5RS_str_t *grp_full_path_r,
+    const char *name)
 {
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
     H5G_bt2_ud_rm_t udata;              /* User data for v2 B-tree record removal */
@@ -1438,16 +1411,15 @@ H5G__dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
     HDassert(name && *name);
 
     /* Open the fractal heap */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+    if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2 = H5B2_open(f, dxpl_id, linfo->name_bt2_addr, NULL)))
+    if(NULL == (bt2 = H5B2_open(f, linfo->name_bt2_addr, NULL)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Set up the user data for the v2 B-tree 'record remove' callback */
     udata.common.f = f;
-    udata.common.dxpl_id = dxpl_id;
     udata.common.fheap = fheap;
     udata.common.name = name;
     udata.common.name_hash = H5_checksum_lookup3(name, HDstrlen(name), 0);
@@ -1459,14 +1431,14 @@ H5G__dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
     udata.replace_names = TRUE;
 
     /* Remove the record from the name index v2 B-tree */
-    if(H5B2_remove(bt2, dxpl_id, &udata, H5G_dense_remove_bt2_cb, &udata) < 0)
+    if(H5B2_remove(bt2, &udata, H5G_dense_remove_bt2_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, FAIL, "unable to remove link from name index v2 B-tree")
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1487,7 +1459,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_remove_by_idx_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, void *_udata)
+H5G_dense_remove_by_idx_fh_cb(const void *obj, size_t obj_len, void *_udata)
 {
     H5G_fh_ud_rmbi_t *udata = (H5G_fh_ud_rmbi_t *)_udata;       /* User data for fractal heap 'op' callback */
     herr_t ret_value = SUCCEED; /* Return value */
@@ -1495,7 +1467,7 @@ H5G_dense_remove_by_idx_fh_cb(const void *obj, size_t H5_ATTR_UNUSED obj_len, vo
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Decode link information */
-    if(NULL == (udata->lnk = (H5O_link_t *)H5O_msg_decode(udata->f, udata->dxpl_id, NULL, H5O_LINK_ID, (const unsigned char *)obj)))
+    if(NULL == (udata->lnk = (H5O_link_t *)H5O_msg_decode(udata->f, NULL, H5O_LINK_ID, obj_len, (const unsigned char *)obj)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, H5_ITER_ERROR, "can't decode link")
 
     /* Can't operate on link here because the fractal heap block is locked */
@@ -1547,12 +1519,10 @@ H5G_dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
 
     /* Set up the user data for fractal heap 'op' callback */
     fh_udata.f = bt2_udata->f;
-    fh_udata.dxpl_id = bt2_udata->dxpl_id;
     fh_udata.lnk = NULL;
 
     /* Call fractal heap 'op' routine, to perform user callback */
-    if(H5HF_op(bt2_udata->fheap, bt2_udata->dxpl_id, heap_id,
-            H5G_dense_remove_by_idx_fh_cb, &fh_udata) < 0)
+    if(H5HF_op(bt2_udata->fheap, heap_id, H5G_dense_remove_by_idx_fh_cb, &fh_udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPERATE, FAIL, "link removal callback failed")
     HDassert(fh_udata.lnk);
 
@@ -1570,7 +1540,6 @@ H5G_dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
 
             /* Set up the user data for the v2 B-tree 'record remove' callback */
             other_bt2_udata.f = bt2_udata->f;
-            other_bt2_udata.dxpl_id = bt2_udata->dxpl_id;
             other_bt2_udata.fheap = bt2_udata->fheap;
             other_bt2_udata.name = fh_udata.lnk->name;
             other_bt2_udata.name_hash = H5_checksum_lookup3(fh_udata.lnk->name, HDstrlen(fh_udata.lnk->name), 0);
@@ -1579,35 +1548,35 @@ H5G_dense_remove_by_idx_bt2_cb(const void *_record, void *_bt2_udata)
         } /* end else */
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(bt2_udata->f, bt2_udata->dxpl_id, bt2_udata->other_bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(bt2_udata->f, bt2_udata->other_bt2_addr, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for 'other' index")
 
         /* Set the common information for the v2 B-tree remove operation */
 
         /* Remove the record from the name index v2 B-tree */
-        if(H5B2_remove(bt2, bt2_udata->dxpl_id, &other_bt2_udata, NULL, NULL) < 0)
+        if(H5B2_remove(bt2, &other_bt2_udata, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, H5_ITER_ERROR, "unable to remove link from 'other' index v2 B-tree")
     } /* end if */
 
     /* Replace open objects' names */
-    if(H5G__link_name_replace(bt2_udata->f, bt2_udata->dxpl_id, bt2_udata->grp_full_path_r, fh_udata.lnk) < 0)
+    if(H5G__link_name_replace(bt2_udata->f, bt2_udata->grp_full_path_r, fh_udata.lnk) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTRENAME, FAIL, "unable to rename open objects")
 
     /* Perform the deletion action on the link */
     /* (call link message "delete" callback directly: *ick* - QAK) */
-    if(H5O_link_delete(bt2_udata->f, bt2_udata->dxpl_id, NULL, fh_udata.lnk) < 0)
+    if(H5O_link_delete(bt2_udata->f, NULL, fh_udata.lnk) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete link")
 
     /* Release the space allocated for the link */
     H5O_msg_free(H5O_LINK_ID, fh_udata.lnk);
 
     /* Remove record from fractal heap */
-    if(H5HF_remove(bt2_udata->fheap, bt2_udata->dxpl_id, heap_id) < 0)
+    if(H5HF_remove(bt2_udata->fheap, heap_id) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, FAIL, "unable to remove link from fractal heap")
 
 done:
     /* Release resources */
-    if(bt2 && H5B2_close(bt2, bt2_udata->dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for 'other' index")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1629,9 +1598,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
-    H5RS_str_t *grp_full_path_r, H5_index_t idx_type, H5_iter_order_t order,
-    hsize_t n)
+H5G__dense_remove_by_idx(H5F_t *f, const H5O_linfo_t *linfo, H5RS_str_t *grp_full_path_r,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n)
 {
     H5HF_t *fheap = NULL;                     /* Fractal heap handle */
     H5G_link_table_t ltable = {0, NULL};      /* Table of links */
@@ -1680,28 +1648,27 @@ H5G__dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
         H5G_bt2_ud_rmbi_t udata;            /* User data for v2 B-tree record removal */
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, bt2_addr, NULL)))
+        if(NULL == (bt2 = H5B2_open(f, bt2_addr, NULL)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for index")
 
         /* Set up the user data for the v2 B-tree 'remove by index' callback */
         udata.f = f;
-        udata.dxpl_id = dxpl_id;
         udata.fheap = fheap;
         udata.idx_type = idx_type;
         udata.other_bt2_addr = idx_type == H5_INDEX_NAME ? linfo->corder_bt2_addr : linfo->name_bt2_addr;
         udata.grp_full_path_r = grp_full_path_r;
 
         /* Remove the record from the name index v2 B-tree */
-        if(H5B2_remove_by_idx(bt2, dxpl_id, order, n, H5G_dense_remove_by_idx_bt2_cb, &udata) < 0)
+        if(H5B2_remove_by_idx(bt2, order, n, H5G_dense_remove_by_idx_bt2_cb, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, FAIL, "unable to remove link from indexed v2 B-tree")
     } /* end if */
     else {      /* Otherwise, we need to build a table of the links and sort it */
         /* Build the table of links for this group */
-        if(H5G__dense_build_table(f, dxpl_id, linfo, idx_type, order, &ltable) < 0)
+        if(H5G__dense_build_table(f, linfo, idx_type, order, &ltable) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "error building table of links")
 
         /* Check for going out of bounds */
@@ -1709,15 +1676,15 @@ H5G__dense_remove_by_idx(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
             HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "index out of bound")
 
         /* Remove the appropriate link from the dense storage */
-        if(H5G__dense_remove(f, dxpl_id, linfo, grp_full_path_r, ltable.lnks[n].name) < 0)
+        if(H5G__dense_remove(f, linfo, grp_full_path_r, ltable.lnks[n].name) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, FAIL, "unable to remove link from dense storage")
     } /* end else */
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for index")
     if(ltable.lnks && H5G__link_release_table(&ltable) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to release link table")
@@ -1740,7 +1707,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__dense_delete(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo, hbool_t adj_link)
+H5G__dense_delete(H5F_t *f, H5O_linfo_t *linfo, hbool_t adj_link)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -1761,12 +1728,11 @@ H5G__dense_delete(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo, hbool_t adj_link)
         H5G_bt2_ud_rm_t udata;          /* User data for v2 B-tree record removal */
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, linfo->fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, linfo->fheap_addr)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
         /* Set up the user data for the v2 B-tree 'record remove' callback */
         udata.common.f = f;
-        udata.common.dxpl_id = dxpl_id;
         udata.common.fheap = fheap;
         udata.common.name = NULL;
         udata.common.name_hash = 0;
@@ -1778,16 +1744,16 @@ H5G__dense_delete(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo, hbool_t adj_link)
         udata.replace_names = FALSE;
 
         /* Delete the name index, adjusting the ref. count on links removed */
-        if(H5B2_delete(f, dxpl_id, linfo->name_bt2_addr, NULL, H5G_dense_remove_bt2_cb, &udata) < 0)
+        if(H5B2_delete(f, linfo->name_bt2_addr, NULL, H5G_dense_remove_bt2_cb, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete v2 B-tree for name index")
 
         /* Close the fractal heap */
-        if(H5HF_close(fheap, dxpl_id) < 0)
+        if(H5HF_close(fheap) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close fractal heap")
     } /* end if */
     else {
         /* Delete the name index, without adjusting the ref. count on the links  */
-        if(H5B2_delete(f, dxpl_id, linfo->name_bt2_addr, NULL, NULL, NULL) < 0)
+        if(H5B2_delete(f, linfo->name_bt2_addr, NULL, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete v2 B-tree for name index")
     } /* end else */
     linfo->name_bt2_addr = HADDR_UNDEF;
@@ -1796,7 +1762,7 @@ H5G__dense_delete(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo, hbool_t adj_link)
     if(linfo->index_corder) {
         /* Delete the creation order index, without adjusting the ref. count on the links  */
         HDassert(H5F_addr_defined(linfo->corder_bt2_addr));
-        if(H5B2_delete(f, dxpl_id, linfo->corder_bt2_addr, NULL, NULL, NULL) < 0)
+        if(H5B2_delete(f, linfo->corder_bt2_addr, NULL, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete v2 B-tree for creation order index")
         linfo->corder_bt2_addr = HADDR_UNDEF;
     } /* end if */
@@ -1804,7 +1770,7 @@ H5G__dense_delete(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo, hbool_t adj_link)
         HDassert(!H5F_addr_defined(linfo->corder_bt2_addr));
 
     /* Delete the fractal heap */
-    if(H5HF_delete(f, dxpl_id, linfo->fheap_addr) < 0)
+    if(H5HF_delete(f, linfo->fheap_addr) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete fractal heap")
     linfo->fheap_addr = HADDR_UNDEF;
 
@@ -1835,8 +1801,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5G_obj_t
-H5G__dense_get_type_by_idx(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
-    hsize_t idx)
+H5G__dense_get_type_by_idx(H5F_t *f, H5O_linfo_t *linfo, hsize_t idx)
 {
     H5G_link_table_t ltable = {0, NULL};        /* Table of links */
     H5G_obj_t ret_value = H5G_UNKNOWN;          /* Return value */
@@ -1850,7 +1815,7 @@ H5G__dense_get_type_by_idx(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
     HDassert(linfo);
 
     /* Build the table of links for this group */
-    if(H5G__dense_build_table(f, dxpl_id, linfo, H5_INDEX_NAME, H5_ITER_INC, &ltable) < 0)
+    if(H5G__dense_build_table(f, linfo, H5_INDEX_NAME, H5_ITER_INC, &ltable) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5G_UNKNOWN, "error building table of links")
 
     /* Check for going out of bounds */
@@ -1871,7 +1836,7 @@ H5G__dense_get_type_by_idx(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
         tmp_oloc.addr = ltable.lnks[idx].u.hard.addr;
 
         /* Get the type of the object */
-        if(H5O_obj_type(&tmp_oloc, &obj_type, dxpl_id) < 0)
+        if(H5O_obj_type(&tmp_oloc, &obj_type) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5G_UNKNOWN, "can't get object type")
 
         /* Map to group object type */
diff --git a/src/H5Gdeprec.c b/src/H5Gdeprec.c
index a775c58..fc346f8 100644
--- a/src/H5Gdeprec.c
+++ b/src/H5Gdeprec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -39,6 +37,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACprivate.h"	/* Metadata cache			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Gpkg.h"		/* Groups		  		*/
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -61,7 +60,6 @@ typedef struct {
     H5G_stat_t  *statbuf;			/* Stat buffer about object */
     hbool_t follow_link;                        /* Whether we are following a link or not */
     H5F_t *loc_file;                            /* Pointer to the file the location is in */
-    hid_t dxpl_id;                              /* Dataset transfer property list */
 } H5G_trav_goi_t;
 
 
@@ -74,17 +72,29 @@ typedef struct {
 /* Local Prototypes */
 /********************/
 
-static herr_t H5G_link_hard(hid_t cur_loc_id, const char *cur_name,
-    hid_t new_loc_id, const char *new_name);
-static herr_t H5G_move(hid_t src_loc_id, const char *src_name,
-    hid_t dst_loc_id, const char *dst_name);
-static herr_t H5G_get_objinfo_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5G__link(hid_t cur_loc_id, const char *cur_name, H5G_link_t type,
+    hid_t new_loc_id, const char *new_name, hid_t lcpl_id);
+static herr_t H5G__move(hid_t src_loc_id, const char *src_name,
+    hid_t dst_loc_id, const char *dst_name, hid_t lcpl_id);
+static herr_t H5G__unlink(H5G_loc_t *loc, const char *name);
+static herr_t H5G__get_linkval(const H5G_loc_t *loc, const char *name, size_t size,
+    char *buf/*out*/);
+static herr_t H5G__set_comment(const H5G_loc_t *loc, const char *name,
+    const char *comment);
+static int H5G__get_comment(const H5G_loc_t *loc, const char *name, char *buf,
+    size_t bufsize);
+static herr_t H5G__iterate(hid_t loc_id, const char *name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t idx, hsize_t *last_lnk,
+    const H5G_link_iterate_t *lnk_op, void *op_data);
+static herr_t H5G__get_num_objs(const H5O_loc_t *oloc, H5G_info_t *grp_info);
+static herr_t H5G__get_objinfo_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5G_get_objinfo(const H5G_loc_t *loc, const char *name,
-    hbool_t follow_link, H5G_stat_t *statbuf/*out*/, hid_t dxpl_id);
-static H5G_obj_t H5G_obj_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx,
-    hid_t dxpl_id);
+static herr_t H5G__get_objinfo(const H5G_loc_t *loc, const char *name,
+    hbool_t follow_link, H5G_stat_t *statbuf/*out*/);
+static ssize_t H5G__get_objname_by_idx(const H5O_loc_t *oloc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t idx, char *name, size_t size);
+static H5G_obj_t H5G__obj_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx);
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
 
@@ -220,12 +230,15 @@ H5Gcreate1(hid_t loc_id, const char *name, size_t size_hint)
     else
         tmp_gcpl = H5P_GROUP_CREATE_DEFAULT;
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Create the new group & get its ID */
-    if(NULL == (grp = H5G__create_named(&loc, name, H5P_LINK_CREATE_DEFAULT,
-            tmp_gcpl, H5P_GROUP_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)))
+    if(NULL == (grp = H5G__create_named(&loc, name, H5P_LINK_CREATE_DEFAULT, tmp_gcpl)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create group")
     if((ret_value = H5I_register(H5I_GROUP, grp, TRUE)) < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register group")
+	HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, FAIL, "unable to register group")
 
 done:
     if(tmp_gcpl > 0 && tmp_gcpl != H5P_GROUP_CREATE_DEFAULT)
@@ -274,7 +287,7 @@ H5Gopen1(hid_t loc_id, const char *name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
     /* Open the group */
-    if((grp = H5G__open_name(&loc, name, H5P_DEFAULT, H5AC_ind_read_dxpl_id)) == NULL)
+    if(NULL == (grp = H5G__open_name(&loc, name)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
 
     /* Register an atom for the group */
@@ -282,10 +295,9 @@ H5Gopen1(hid_t loc_id, const char *name)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register group")
 
 done:
-    if(ret_value < 0) {
+    if(ret_value < 0)
         if(grp && H5G_close(grp) < 0)
             HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "unable to release group")
-    } /* end if */
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Gopen1() */
@@ -313,23 +325,13 @@ H5Glink(hid_t cur_loc_id, H5G_link_t type, const char *cur_name, const char *new
     if(!new_name || !*new_name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no new name specified")
 
-    if(type == H5L_TYPE_HARD) {
-        if((ret_value = H5G_link_hard(cur_loc_id, cur_name, H5L_SAME_LOC, new_name)) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "couldn't create link")
-    } /* end if */
-    else if(type == H5L_TYPE_SOFT) {
-        H5G_loc_t	cur_loc;                /* Group location for new link */
-
-        /* Finish checking arguments */
-        if(H5G_loc(cur_loc_id, &cur_loc) < 0)
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(cur_loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
 
-        /* Create the link */
-        if(H5L_create_soft(cur_name, &cur_loc, new_name, H5P_DEFAULT, H5P_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create link")
-    } /* end else if */
-    else
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Not a valid link type")
+    /* Call internal routine to create link */
+    if(H5G__link(cur_loc_id, cur_name, type, H5L_SAME_LOC, new_name, H5P_LINK_CREATE_DEFAULT) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "couldn't create link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -359,28 +361,13 @@ H5Glink2(hid_t cur_loc_id, const char *cur_name, H5G_link_t type,
     if(!new_name || !*new_name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no new name specified")
 
-    if(type == H5L_TYPE_HARD) {
-        if((ret_value = H5G_link_hard(cur_loc_id, cur_name, new_loc_id, new_name)) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "couldn't create link")
-    } /* end if */
-    else if(type == H5L_TYPE_SOFT) {
-        H5G_loc_t	new_loc;                /* Group location for new link */
-
-        /* Soft links only need one location, the new_loc_id, but it's possible that
-         * new_loc_id is H5L_SAME_LOC */
-        if(new_loc_id == H5L_SAME_LOC)
-            new_loc_id = cur_loc_id;
-
-        /* Finish checking arguments */
-        if(H5G_loc(new_loc_id, &new_loc) < 0)
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(cur_loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
 
-        /* Create the link */
-        if(H5L_create_soft(cur_name, &new_loc, new_name, H5P_DEFAULT, H5P_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create link")
-    } /* end else if */
-    else
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "not a valid link type")
+    /* Call internal routine to create link */
+    if(H5G__link(cur_loc_id, cur_name, type, new_loc_id, new_name, H5P_LINK_CREATE_DEFAULT) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "couldn't create link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -388,57 +375,74 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_link_hard
+ * Function:	H5G__link
  *
- * Purpose:	Creates a hard link from NEW_NAME to CUR_NAME.
- *
- *		CUR_NAME must name an existing object.  CUR_NAME and
- *              NEW_NAME are interpreted relative to CUR_LOC_ID and
- *              NEW_LOC_ID, which are either file IDs or group IDs.
+ * Purpose:	Internal routine to create a new link.
  *
  * Return:	Non-negative on success/Negative on failure
  *
  * Programmer:	Quincey Koziol
- *              Monday, November  6, 2006
+ *              Monday, December 18, 2017
  *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_link_hard(hid_t cur_loc_id, const char *cur_name, hid_t new_loc_id,
-    const char *new_name)
+H5G__link(hid_t cur_loc_id, const char *cur_name, H5G_link_t type,
+    hid_t new_loc_id, const char *new_name, hid_t lcpl_id)
 {
-    H5G_loc_t	cur_loc, *cur_loc_p;    /* Information about current link's group */
-    H5G_loc_t	new_loc, *new_loc_p;    /* Information about new link's group */
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    H5G_loc_t	new_loc;                /* Information about new link's group */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC_VOL
 
-    /* Finish checking arguments */
-    if(cur_loc_id == H5L_SAME_LOC && new_loc_id == H5L_SAME_LOC)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "source and destination should not be both H5L_SAME_LOC")
-    if(cur_loc_id != H5L_SAME_LOC && H5G_loc(cur_loc_id, &cur_loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(new_loc_id != H5L_SAME_LOC && H5G_loc(new_loc_id, &new_loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+    /* Create the appropriate kind of link */
+    if(type == H5L_TYPE_HARD) {
+        H5G_loc_t	cur_loc, *cur_loc_p;    /* Information about current link's group */
+        H5G_loc_t	*new_loc_p;             /* Information about new link's group */
+
+        /* Finish checking arguments */
+        if(cur_loc_id == H5L_SAME_LOC && new_loc_id == H5L_SAME_LOC)
+            HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "source and destination should not be both H5L_SAME_LOC")
+        if(cur_loc_id != H5L_SAME_LOC && H5G_loc(cur_loc_id, &cur_loc) < 0)
+            HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location")
+        if(new_loc_id != H5L_SAME_LOC && H5G_loc(new_loc_id, &new_loc) < 0)
+            HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location")
+
+        /* Set up current & new location pointers */
+        cur_loc_p = &cur_loc;
+        new_loc_p = &new_loc;
+        if(cur_loc_id == H5L_SAME_LOC)
+            cur_loc_p = new_loc_p;
+        else if(new_loc_id == H5L_SAME_LOC)
+            new_loc_p = cur_loc_p;
+        else if(cur_loc_p->oloc->file != new_loc_p->oloc->file)
+            HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "source and destination should be in the same file.")
+
+        /* Create the link */
+        if(H5L_create_hard(cur_loc_p, cur_name, new_loc_p, new_name, lcpl_id) < 0)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create link")
+    } /* end if */
+    else if(type == H5L_TYPE_SOFT) {
+        /* Soft links only need one location, the new_loc_id, but it's possible
+         * that new_loc_id is H5L_SAME_LOC
+         */
+        if(new_loc_id == H5L_SAME_LOC)
+            new_loc_id = cur_loc_id;
+
+        /* Finish checking arguments */
+        if(H5G_loc(new_loc_id, &new_loc) < 0)
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
-    /* Set up current & new location pointers */
-    cur_loc_p = &cur_loc;
-    new_loc_p = &new_loc;
-    if(cur_loc_id == H5L_SAME_LOC)
-        cur_loc_p = new_loc_p;
-    else if(new_loc_id == H5L_SAME_LOC)
-   	new_loc_p = cur_loc_p;
-    else if(cur_loc_p->oloc->file != new_loc_p->oloc->file)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "source and destination should be in the same file.")
-
-    /* Create the link */
-    if(H5L_create_hard(cur_loc_p, cur_name, new_loc_p, new_name,
-                H5P_DEFAULT, H5P_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-	HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create link")
+        /* Create the link */
+        if(H5L_create_soft(cur_name, &new_loc, new_name, lcpl_id) < 0)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create link")
+    } /* end else if */
+    else
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "Not a valid link type")
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_link_hard() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__link() */
 
 
 /*-------------------------------------------------------------------------
@@ -451,14 +455,18 @@ done:
 herr_t
 H5Gmove(hid_t src_loc_id, const char *src_name, const char *dst_name)
 {
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE3("e", "i*s*s", src_loc_id, src_name, dst_name);
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(src_loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Call common routine to move the link */
-    if(H5G_move(src_loc_id, src_name, H5L_SAME_LOC, dst_name) < 0)
-      HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "couldn't move link")
+    if(H5G__move(src_loc_id, src_name, H5L_SAME_LOC, dst_name, H5P_LINK_CREATE_DEFAULT) < 0)
+      HGOTO_ERROR(H5E_SYM, H5E_CANTMOVE, FAIL, "couldn't move link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -476,14 +484,22 @@ herr_t
 H5Gmove2(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
     const char *dst_name)
 {
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("e", "i*si*s", src_loc_id, src_name, dst_loc_id, dst_name);
 
+    /* Check arguments */
+    if(src_loc_id == H5L_SAME_LOC && dst_loc_id == H5L_SAME_LOC)
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "source and destination should not both be H5L_SAME_LOC")
+
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(dst_loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* Call common routine to move the link */
-    if(H5G_move(src_loc_id, src_name, dst_loc_id, dst_name) < 0)
-      HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "couldn't move link")
+    if(H5G__move(src_loc_id, src_name, dst_loc_id, dst_name, H5P_LINK_CREATE_DEFAULT) < 0)
+      HGOTO_ERROR(H5E_SYM, H5E_CANTMOVE, FAIL, "couldn't move link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -491,7 +507,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_move
+ * Function:	H5G__move
  *
  * Purpose:	Renames an object within an HDF5 file and moves it to a new
  *              group.  The original name SRC is unlinked from the group graph
@@ -508,26 +524,24 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_move(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
-    const char *dst_name)
+H5G__move(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
+    const char *dst_name, hid_t lcpl_id)
 {
     H5G_loc_t	src_loc, *src_loc_p;    /* Group info for source location */
     H5G_loc_t	dst_loc, *dst_loc_p;    /* Group info for destination location */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC_VOL
 
     /* Check arguments */
-    if(src_loc_id == H5L_SAME_LOC && dst_loc_id == H5L_SAME_LOC)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "source and destination should not both be H5L_SAME_LOC")
     if(src_loc_id != H5L_SAME_LOC && H5G_loc(src_loc_id, &src_loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+        HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location")
     if(dst_loc_id != H5L_SAME_LOC && H5G_loc(dst_loc_id, &dst_loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+        HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location")
     if(!src_name || !*src_name)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no current name specified")
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no current name specified")
     if(!dst_name || !*dst_name)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no destination name specified")
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no destination name specified")
 
     /* Set up src & dst location pointers */
     src_loc_p = &src_loc;
@@ -538,13 +552,12 @@ H5G_move(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
         dst_loc_p = src_loc_p;
 
     /* Move the link */
-    if(H5L_move(src_loc_p, src_name, dst_loc_p, dst_name, FALSE, H5P_DEFAULT,
-            H5P_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-	HGOTO_ERROR(H5E_LINK, H5E_CANTMOVE, FAIL, "unable to move link")
+    if(H5L_move(src_loc_p, src_name, dst_loc_p, dst_name, FALSE, lcpl_id) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTMOVE, FAIL, "unable to move link")
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_move() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__move() */
 
 
 /*-------------------------------------------------------------------------
@@ -565,13 +578,17 @@ H5Gunlink(hid_t loc_id, const char *name)
 
     /* Check arguments */
     if(H5G_loc(loc_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+	HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location")
     if(!name || !*name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
+	HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no name")
 
-    /* Call H5L routine... */
-    if(H5L_delete(&loc, name, H5P_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-      HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "couldn't delete link")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
+    /* Call internal routine */
+    if(H5G__unlink(&loc, name) < 0)
+      HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "couldn't delete link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -579,6 +596,37 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5G__unlink
+ *
+ * Purpose:	Internal version of H5Gunlink.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, December 23, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5G__unlink(H5G_loc_t *loc, const char *name)
+{
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Call H5L routine... */
+    if(H5L_delete(loc, name) < 0)
+      HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "couldn't delete link")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__unlink() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5Gget_linkval
  *
  * Purpose:	Retrieve's a soft link's data.  The new API is
@@ -601,9 +649,13 @@ H5Gget_linkval(hid_t loc_id, const char *name, size_t size, char *buf/*out*/)
     if(!name || !*name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
 
-    /* Call the new link routine which provides this capability */
-    if(H5L_get_val(&loc, name, buf, size, H5P_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-      HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "couldn't get link info")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
+    /* Call internal routine */
+    if(H5G__get_linkval(&loc, name, size, buf) < 0)
+      HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "couldn't delete link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -611,6 +663,38 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5G__get_linkval
+ *
+ * Purpose:	Internal version of H5Gget_linkval.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, December 23, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5G__get_linkval(const H5G_loc_t *loc, const char *name, size_t size,
+    char *buf/*out*/)
+{
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Call the link routine which provides this capability */
+    if(H5L_get_val(loc, name, buf, size) < 0)
+      HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "couldn't get link info")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_linkval() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5Gset_comment
  *
  * Purpose:     Gives the specified object a comment.  The COMMENT string
@@ -630,7 +714,7 @@ done:
 herr_t
 H5Gset_comment(hid_t loc_id, const char *name, const char *comment)
 {
-    H5G_loc_t	loc;
+    H5G_loc_t	loc;                    /* Group's location */
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -641,8 +725,13 @@ H5Gset_comment(hid_t loc_id, const char *name, const char *comment)
     if(!name || !*name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
 
-    if(H5G_loc_set_comment(&loc, name, comment, H5P_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to set comment value")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
+    /* Call internal routine */
+    if(H5G__set_comment(&loc, name, comment) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "unable to set comment value")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -650,6 +739,37 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5G__set_comment
+ *
+ * Purpose:	Internal version of H5Gset_comment.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, December 23, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5G__set_comment(const H5G_loc_t *loc, const char *name, const char *comment)
+{
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Call the common routine which provides this capability */
+    if(H5G_loc_set_comment(loc, name, comment) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "unable to set comment value")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__set_comment() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5Gget_comment
  *
  * Purpose:	Return at most BUFSIZE characters of the comment for the
@@ -675,8 +795,8 @@ done:
 int
 H5Gget_comment(hid_t loc_id, const char *name, size_t bufsize, char *buf)
 {
-    H5G_loc_t	loc;
-    int	ret_value;
+    H5G_loc_t	loc;                    /* Group's location */
+    int	ret_value;                      /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("Is", "i*sz*s", loc_id, name, bufsize, buf);
@@ -688,8 +808,13 @@ H5Gget_comment(hid_t loc_id, const char *name, size_t bufsize, char *buf)
     if(bufsize > 0 && !buf)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no buffer specified")
 
-    if((ret_value = (int)H5G_loc_get_comment(&loc, name, buf, bufsize, H5P_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to get comment value")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
+    /* Call internal routine */
+    if((ret_value = H5G__get_comment(&loc, name, buf, bufsize)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get comment value")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -697,29 +822,58 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Giterate
+ * Function:	H5G__get_comment
  *
- * Purpose:	Iterates over the entries of a group.  The LOC_ID and NAME
- *		identify the group over which to iterate and IDX indicates
- *		where to start iterating (zero means at the beginning).	 The
- *		OPERATOR is called for each member and the iteration
- *		continues until the operator returns non-zero or all members
- *		are processed. The operator is passed a group ID for the
- *		group being iterated, a member name, and OP_DATA for each
- *		member.
+ * Purpose:	Internal version of H5Gget_comment.
  *
- * Note:	Deprecated in favor of H5Literate
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
  *
- * Return:	Success:	The return value of the first operator that
- *				returns non-zero, or zero if all members were
- *				processed with no operator returning non-zero.
+ * Return:	Non-negative on success / Negative on failure
  *
- *		Failure:	Negative if something goes wrong within the
- *				library, or the negative value returned by one
- *				of the operators.
+ * Programmer:	Quincey Koziol
+ *              Saturday, December 23, 2017
  *
- * Programmer:	Robb Matzke
- *		Monday, March 23, 1998
+ *-------------------------------------------------------------------------
+ */
+static int
+H5G__get_comment(const H5G_loc_t *loc, const char *name, char *buf,
+    size_t bufsize)
+{
+    int ret_value = FAIL;       /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Call the common routine which provides this capability */
+    if((ret_value = (int)H5G_loc_get_comment(loc, name, buf, bufsize)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get comment value")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_comment() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Giterate
+ *
+ * Purpose:     Iterates over the entries of a group.  The LOC_ID and NAME
+ *              identify the group over which to iterate and IDX indicates
+ *              where to start iterating (zero means at the beginning).	 The
+ *              OPERATOR is called for each member and the iteration
+ *              continues until the operator returns non-zero or all members
+ *              are processed. The operator is passed a group ID for the
+ *              group being iterated, a member name, and OP_DATA for each
+ *              member.
+ *
+ * NOTE:        Deprecated in favor of H5Literate
+ *
+ * Return:      Success:    The return value of the first operator that
+ *                          returns non-zero, or zero if all members were
+ *                          processed with no operator returning non-zero.
+ *
+ *              Failure:    Negative if something goes wrong within the
+ *                          library, or the negative value returned by one
+ *                          of the operators.
  *
  *-------------------------------------------------------------------------
  */
@@ -727,21 +881,21 @@ herr_t
 H5Giterate(hid_t loc_id, const char *name, int *idx_p, H5G_iterate_t op,
     void *op_data)
 {
-    H5G_link_iterate_t lnk_op;          /* Link operator */
-    hsize_t     last_obj;               /* Index of last object looked at */
-    hsize_t	idx;                    /* Internal location to hold index */
-    herr_t	ret_value;
+    H5G_link_iterate_t  lnk_op;         /* Link operator                    */
+    hsize_t             last_obj;       /* Index of last object looked at   */
+    hsize_t	        idx;            /* Internal location to hold index  */
+    herr_t              ret_value;      /* Return value                     */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE5("e", "i*s*Isx*x", loc_id, name, idx_p, op, op_data);
 
     /* Check args */
     if(!name || !*name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no name specified")
     if(idx_p && *idx_p < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified")
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "invalid index specified")
     if(!op)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no operator specified")
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no operator specified")
 
     /* Set number of objects looked at to zero */
     last_obj = 0;
@@ -752,8 +906,8 @@ H5Giterate(hid_t loc_id, const char *name, int *idx_p, H5G_iterate_t op,
     lnk_op.op_func.op_old = op;
 
     /* Call private function. */
-    if((ret_value = H5G_iterate(loc_id, name, H5_INDEX_NAME, H5_ITER_INC, idx, &last_obj, &lnk_op, op_data, H5P_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "group iteration failed")
+    if((ret_value = H5G__iterate(loc_id, name, H5_INDEX_NAME, H5_ITER_INC, idx, &last_obj, &lnk_op, op_data)) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "group iteration failed")
 
     /* Set the index we stopped at */
     if(idx_p)
@@ -765,6 +919,39 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5G__iterate
+ *
+ * Purpose:	Internal version of H5Giterate.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, December 23, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5G__iterate(hid_t loc_id, const char *name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t idx, hsize_t *last_lnk,
+    const H5G_link_iterate_t *lnk_op, void *op_data)
+{
+    herr_t ret_value = FAIL;            /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Call the common routine which provides this capability */
+    if((ret_value = H5G_iterate(loc_id, name, idx_type, order, idx, last_lnk, lnk_op, op_data)) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "group iteration failed")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__iterate() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5Gget_num_objs
  *
  * Purpose:     Returns the number of objects in the group.  It iterates
@@ -783,26 +970,21 @@ done:
 herr_t
 H5Gget_num_objs(hid_t loc_id, hsize_t *num_objs)
 {
-    H5G_loc_t		loc;            /* Location of object */
-    H5G_info_t          grp_info;       /* Group information */
-    H5O_type_t          obj_type;       /* Type of object at location */
-    herr_t		ret_value = SUCCEED;
+    H5G_loc_t	loc;            /* Location of object */
+    H5G_info_t  grp_info;       /* Group information */
+    herr_t	ret_value = SUCCEED;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("e", "i*h", loc_id, num_objs);
 
     /* Check args */
     if(H5G_loc(loc_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location ID")
-    if(H5O_obj_type(loc.oloc, &obj_type, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object type")
-    if(obj_type != H5O_TYPE_GROUP)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
+	HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location ID")
     if(!num_objs)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "bad pointer to # of objects")
+	HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "bad pointer to # of objects")
 
-    /* Retrieve information about the group */
-    if(H5G__obj_info(loc.oloc, &grp_info, H5AC_ind_read_dxpl_id) < 0)
+    /* Call the internal routine */
+    if(H5G__get_num_objs(loc.oloc, &grp_info) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTCOUNT, FAIL, "can't determine")
 
     /* Set the number of objects [sic: links] in the group */
@@ -814,6 +996,44 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5G__get_num_objs
+ *
+ * Purpose:	Internal version of H5Gget_num_objs.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, December 23, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5G__get_num_objs(const H5O_loc_t *oloc, H5G_info_t *grp_info)
+{
+    H5O_type_t obj_type;                /* Type of object at location */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check args */
+    if(H5O_obj_type(oloc, &obj_type) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object type")
+    if(obj_type != H5O_TYPE_GROUP)
+        HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a group")
+
+    /* Retrieve information about the group */
+    if(H5G__obj_info(oloc, grp_info) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTCOUNT, FAIL, "can't determine # of objects")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_num_objs() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5Gget_objinfo
  *
  * Purpose:	Returns information about an object.  If FOLLOW_LINK is
@@ -834,7 +1054,7 @@ herr_t
 H5Gget_objinfo(hid_t loc_id, const char *name, hbool_t follow_link,
 	       H5G_stat_t *statbuf/*out*/)
 {
-    H5G_loc_t	loc;
+    H5G_loc_t	loc;                    /* Group's location */
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -842,13 +1062,13 @@ H5Gget_objinfo(hid_t loc_id, const char *name, hbool_t follow_link,
 
     /* Check arguments */
     if(H5G_loc(loc_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+	HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location")
     if(!name || !*name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
+	HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no name specified")
 
     /* Get info */
-    if(H5G_get_objinfo(&loc, name, follow_link, statbuf, H5AC_ind_read_dxpl_id) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "cannot stat object")
+    if(H5G__get_objinfo(&loc, name, follow_link, statbuf) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "cannot stat object")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -856,7 +1076,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_get_objinfo_cb
+ * Function:	H5G__get_objinfo_cb
  *
  * Purpose:	Callback for retrieving info about an object.  This routine
  *              gets the info
@@ -869,13 +1089,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_get_objinfo_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
+H5G__get_objinfo_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
     H5G_loc_t *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
 {
     H5G_trav_goi_t *udata = (H5G_trav_goi_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid link */
     if(lnk == NULL && obj_loc == NULL)
@@ -898,7 +1118,7 @@ H5G_get_objinfo_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name, co
             /* Go retrieve the object information */
             /* (don't need index & heap info) */
             HDassert(obj_loc);
-            if(H5O_get_info(obj_loc->oloc, udata->dxpl_id, FALSE, &oinfo) < 0)
+            if(H5O_get_info(obj_loc->oloc, FALSE, &oinfo) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to get object info")
 
             /* Get mapped object type */
@@ -931,11 +1151,11 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_get_objinfo_cb() */
+} /* end H5G__get_objinfo_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_get_objinfo
+ * Function:	H5G__get_objinfo
  *
  * Purpose:	Returns information about an object.
  *
@@ -951,14 +1171,15 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_get_objinfo(const H5G_loc_t *loc, const char *name, hbool_t follow_link,
-    H5G_stat_t *statbuf/*out*/, hid_t dxpl_id)
+H5G__get_objinfo(const H5G_loc_t *loc, const char *name, hbool_t follow_link,
+    H5G_stat_t *statbuf/*out*/)
 {
     H5G_trav_goi_t udata;           /* User data for callback */
     herr_t      ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC_VOL
 
+    /* Sanity checks */
     HDassert(loc);
     HDassert(name && *name);
 
@@ -970,11 +1191,10 @@ H5G_get_objinfo(const H5G_loc_t *loc, const char *name, hbool_t follow_link,
     udata.statbuf = statbuf;
     udata.follow_link = follow_link;
     udata.loc_file = loc->oloc->file;
-    udata.dxpl_id = dxpl_id;
 
     /* Traverse the group hierarchy to locate the object to get info about */
     if(H5G_traverse(loc, name, (unsigned)(follow_link ? H5G_TARGET_NORMAL : H5G_TARGET_SLINK|H5G_TARGET_UDLINK),
-            H5G_get_objinfo_cb, &udata, H5P_DEFAULT, dxpl_id) < 0)
+            H5G__get_objinfo_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_EXISTS, FAIL, "name doesn't exist")
 
     /* If we're pointing at a soft or UD link, get the real link length and type */
@@ -985,7 +1205,7 @@ H5G_get_objinfo(const H5G_loc_t *loc, const char *name, hbool_t follow_link,
         /* Get information about link to the object. If this fails, e.g.
          * because the object is ".", just treat the object as a hard link. */
         H5E_BEGIN_TRY {
-            ret = H5L_get_info(loc, name, &linfo, H5P_DEFAULT, dxpl_id);
+            ret = H5L_get_info(loc, name, &linfo);
         } H5E_END_TRY
 
         if(ret >= 0 && linfo.type != H5L_TYPE_HARD) {
@@ -1000,8 +1220,8 @@ H5G_get_objinfo(const H5G_loc_t *loc, const char *name, hbool_t follow_link,
     } /* end if */
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_get_objinfo() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_objinfo() */
 
 
 /*-------------------------------------------------------------------------
@@ -1030,23 +1250,18 @@ done:
 ssize_t
 H5Gget_objname_by_idx(hid_t loc_id, hsize_t idx, char *name, size_t size)
 {
-    H5G_loc_t		loc;            /* Object location */
-    H5O_type_t          obj_type;       /* Type of object at location */
-    ssize_t		ret_value;
+    H5G_loc_t	loc;            /* Object location */
+    ssize_t	ret_value;
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("Zs", "ih*sz", loc_id, idx, name, size);
 
     /* Check args */
     if(H5G_loc(loc_id, &loc) < 0)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location ID")
-    if(H5O_obj_type(loc.oloc, &obj_type, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, FAIL, "can't get object type")
-    if(obj_type != H5O_TYPE_GROUP)
-        HGOTO_ERROR(H5E_DATASET, H5E_BADTYPE, FAIL, "not a group")
+	HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a location ID")
 
     /* Call internal function */
-    if((ret_value = H5G_obj_get_name_by_idx(loc.oloc, H5_INDEX_NAME, H5_ITER_INC, idx, name, size, H5AC_ind_read_dxpl_id)) < 0)
+    if((ret_value = H5G__get_objname_by_idx(loc.oloc, H5_INDEX_NAME, H5_ITER_INC, idx, name, size)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "can't get object name")
 
 done:
@@ -1055,6 +1270,45 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5G__get_objname_by_idx
+ *
+ * Purpose:	Internal version of H5Gget_objname_by_idx.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Saturday, December 23, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static ssize_t
+H5G__get_objname_by_idx(const H5O_loc_t *oloc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t idx, char *name, size_t size)
+{
+    H5O_type_t obj_type;        /* Type of object at location */
+    ssize_t ret_value = FAIL;   /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check args */
+    if(H5O_obj_type(oloc, &obj_type) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object type")
+    if(obj_type != H5O_TYPE_GROUP)
+        HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "not a group")
+
+    /* Call common routine */
+    if((ret_value = H5G_obj_get_name_by_idx(oloc, idx_type, order, idx, name, size)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object name")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_objname_by_idx() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5Gget_objtype_by_idx
  *
  * Purpose:     Returns the type of objects in the group by giving index.
@@ -1072,9 +1326,8 @@ done:
 H5G_obj_t
 H5Gget_objtype_by_idx(hid_t loc_id, hsize_t idx)
 {
-    H5G_loc_t		loc;            /* Object location */
-    H5O_type_t          obj_type;       /* Type of object at location */
-    H5G_obj_t		ret_value;
+    H5G_loc_t	loc;            /* Object location */
+    H5G_obj_t	ret_value;
 
     FUNC_ENTER_API(H5G_UNKNOWN)
     H5TRACE2("Go", "ih", loc_id, idx);
@@ -1082,13 +1335,9 @@ H5Gget_objtype_by_idx(hid_t loc_id, hsize_t idx)
     /* Check args */
     if(H5G_loc(loc_id, &loc) < 0)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "not a location ID")
-    if(H5O_obj_type(loc.oloc, &obj_type, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5G_UNKNOWN, "can't get object type")
-    if(obj_type != H5O_TYPE_GROUP)
-        HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, H5G_UNKNOWN, "not a group")
 
     /* Call internal function*/
-    if((ret_value = H5G_obj_get_type_by_idx(loc.oloc, idx, H5AC_ind_read_dxpl_id)) == H5G_UNKNOWN)
+    if(H5G_UNKNOWN == (ret_value = H5G__obj_get_type_by_idx(loc.oloc, idx)))
 	HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, H5G_UNKNOWN, "can't get object type")
 
 done:
@@ -1097,7 +1346,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_obj_get_type_by_idx
+ * Function:	H5G__obj_get_type_by_idx
  *
  * Purpose:     Private function for H5Gget_objtype_by_idx.
  *              Returns the type of objects in the group by giving index.
@@ -1112,40 +1361,47 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5G_obj_t
-H5G_obj_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx, hid_t dxpl_id)
+H5G__obj_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx)
 {
     H5O_linfo_t	linfo;		/* Link info message */
     htri_t linfo_exists;        /* Whether the link info message exists */
+    H5O_type_t obj_type;        /* Type of object at location */
     H5G_obj_t ret_value = H5G_UNKNOWN;  /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oloc->addr, H5G_UNKNOWN)
+    FUNC_ENTER_STATIC_VOL_TAG(oloc->addr)
 
     /* Sanity check */
     HDassert(oloc);
 
+    /* Check args */
+    if(H5O_obj_type(oloc, &obj_type) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5G_UNKNOWN, "can't get object type")
+    if(obj_type != H5O_TYPE_GROUP)
+        HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, H5G_UNKNOWN, "not a group")
+
     /* Attempt to get the link info for this group */
-    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5G_UNKNOWN, "can't check for link info message")
     if(linfo_exists) {
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Get the object's name from the dense link storage */
-            if((ret_value = H5G__dense_get_type_by_idx(oloc->file, dxpl_id, &linfo, idx)) < 0)
+            if((ret_value = H5G__dense_get_type_by_idx(oloc->file, &linfo, idx)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "can't locate type")
         } /* end if */
         else {
             /* Get the object's type from the link messages */
-            if((ret_value = H5G__compact_get_type_by_idx(oloc, dxpl_id, &linfo, idx)) < 0)
+            if((ret_value = H5G__compact_get_type_by_idx(oloc, &linfo, idx)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "can't locate type")
         } /* end else */
     } /* end if */
     else {
         /* Get the object's type from the symbol table */
-        if((ret_value = H5G__stab_get_type_by_idx(oloc, idx, dxpl_id)) < 0)
+        if((ret_value = H5G__stab_get_type_by_idx(oloc, idx)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "can't locate type")
     } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, H5G_UNKNOWN)
-} /* end H5G_obj_get_type_by_idx() */
+    FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)
+} /* end H5G__obj_get_type_by_idx() */
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
diff --git a/src/H5Gent.c b/src/H5Gent.c
index f64eaf0..baee35c 100644
--- a/src/H5Gent.c
+++ b/src/H5Gent.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -93,7 +91,7 @@ H5FL_BLK_EXTERN(str_buf);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__ent_decode_vec(const H5F_t *f, const uint8_t **pp, H5G_entry_t *ent, unsigned n)
+H5G__ent_decode_vec(const H5F_t *f, const uint8_t **pp, const uint8_t *p_end, H5G_entry_t *ent, unsigned n)
 {
     unsigned    u;                      /* Local index variable */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -106,9 +104,12 @@ H5G__ent_decode_vec(const H5F_t *f, const uint8_t **pp, H5G_entry_t *ent, unsign
     HDassert(ent);
 
     /* decode entries */
-    for(u = 0; u < n; u++)
+    for(u = 0; u < n; u++) {
+        if(*pp > p_end)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, FAIL, "ran off the end of the image buffer")
         if(H5G_ent_decode(f, pp, ent + u) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTDECODE, FAIL, "can't decode")
+    }
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -389,9 +390,8 @@ H5G__ent_reset(H5G_entry_t *ent)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__ent_convert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, const char *name,
-    const H5O_link_t *lnk, H5O_type_t obj_type, const void *crt_info,
-    H5G_entry_t *ent)
+H5G__ent_convert(H5F_t *f, H5HL_t *heap, const char *name, const H5O_link_t *lnk,
+    H5O_type_t obj_type, const void *crt_info, H5G_entry_t *ent)
 {
     size_t	name_offset;            /* Offset of name in heap */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -410,7 +410,7 @@ H5G__ent_convert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, const char *name,
     /*
      * Add the new name to the heap.
      */
-    name_offset = H5HL_insert(f, dxpl_id, heap, HDstrlen(name) + 1, name);
+    name_offset = H5HL_insert(f, heap, HDstrlen(name) + 1, name);
     if(0 == name_offset || UFAIL == name_offset)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert symbol name into heap")
     ent->name_off = name_offset;
@@ -438,8 +438,7 @@ H5G__ent_convert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, const char *name,
                     targ_oloc.addr = lnk->u.hard.addr;
 
                     /* Check if a symbol table message exists */
-                    if((stab_exists = H5O_msg_exists(&targ_oloc, H5O_STAB_ID,
-                            dxpl_id)) < 0)
+                    if((stab_exists = H5O_msg_exists(&targ_oloc, H5O_STAB_ID)) < 0)
                         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to check for STAB message")
 
                     HDassert(!stab_exists);
@@ -460,23 +459,20 @@ H5G__ent_convert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, const char *name,
                 targ_oloc.addr = lnk->u.hard.addr;
 
                 /* Get the object header */
-                if(NULL == (oh = H5O_protect(&targ_oloc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+                if(NULL == (oh = H5O_protect(&targ_oloc, H5AC__READ_ONLY_FLAG, FALSE)))
                     HGOTO_ERROR(H5E_SYM, H5E_CANTPROTECT, FAIL, "unable to protect target object header")
 
                 /* Check if a symbol table message exists */
                 if((stab_exists = H5O_msg_exists_oh(oh, H5O_STAB_ID)) < 0) {
-                    if(H5O_unprotect(&targ_oloc, dxpl_id, oh, H5AC__NO_FLAGS_SET)
-                            < 0)
+                    if(H5O_unprotect(&targ_oloc, oh, H5AC__NO_FLAGS_SET) < 0)
                         HERROR(H5E_SYM, H5E_CANTUNPROTECT, "unable to release object header");
                     HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to check for STAB message")
                 } /* end if */
 
                 if(stab_exists) {
                     /* Read symbol table message */
-                    if(NULL == H5O_msg_read_oh(f, dxpl_id, oh, H5O_STAB_ID,
-                            &stab)) {
-                        if(H5O_unprotect(&targ_oloc, dxpl_id, oh,
-                                H5AC__NO_FLAGS_SET) < 0)
+                    if(NULL == H5O_msg_read_oh(f, oh, H5O_STAB_ID, &stab)) {
+                        if(H5O_unprotect(&targ_oloc, oh, H5AC__NO_FLAGS_SET) < 0)
                             HERROR(H5E_SYM, H5E_CANTUNPROTECT, "unable to release object header");
                         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to read STAB message")
                     } /* end if */
@@ -490,8 +486,7 @@ H5G__ent_convert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, const char *name,
                     /* No symbol table message, don't cache anything */
                     ent->type = H5G_NOTHING_CACHED;
 
-                if(H5O_unprotect(&targ_oloc, dxpl_id, oh, H5AC__NO_FLAGS_SET)
-                        < 0)
+                if(H5O_unprotect(&targ_oloc, oh, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
             } /* end else */
             else
@@ -505,7 +500,7 @@ H5G__ent_convert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, const char *name,
                 size_t	lnk_offset;		/* Offset to sym-link value	*/
 
                 /* Insert link value into local heap */
-                if(UFAIL == (lnk_offset = H5HL_insert(f, dxpl_id, heap,
+                if(UFAIL == (lnk_offset = H5HL_insert(f, heap,
                         HDstrlen(lnk->u.soft.name) + 1, lnk->u.soft.name)))
                     HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to write link value to local heap")
 
@@ -543,8 +538,8 @@ herr_t
 H5G__ent_debug(const H5G_entry_t *ent, FILE *stream, int indent, int fwidth,
     const H5HL_t *heap)
 {
-    const char		*lval = NULL;
-    int nested_indent, nested_fwidth;
+    const char  *lval = NULL;
+    int         nested_indent, nested_fwidth;
 
     FUNC_ENTER_PACKAGE_NOERR
 
@@ -553,14 +548,14 @@ H5G__ent_debug(const H5G_entry_t *ent, FILE *stream, int indent, int fwidth,
     nested_fwidth = MAX(0, fwidth - 3);
 
     HDfprintf(stream, "%*s%-*s %lu\n", indent, "", fwidth,
-	      "Name offset into private heap:",
-	      (unsigned long) (ent->name_off));
+              "Name offset into private heap:",
+	          (unsigned long) (ent->name_off));
 
     HDfprintf(stream, "%*s%-*s %a\n", indent, "", fwidth,
-	      "Object header address:", ent->header);
+              "Object header address:", ent->header);
 
     HDfprintf(stream, "%*s%-*s ", indent, "", fwidth,
-	      "Cache info type:");
+              "Cache info type:");
     switch(ent->type) {
         case H5G_NOTHING_CACHED:
             HDfprintf(stream, "Nothing Cached\n");
@@ -583,13 +578,13 @@ H5G__ent_debug(const H5G_entry_t *ent, FILE *stream, int indent, int fwidth,
             HDfprintf(stream, "%*s%-*s\n", indent, "", fwidth,
                       "Cached information:");
             HDfprintf(stream, "%*s%-*s %lu\n", nested_indent, "", nested_fwidth,
-                       "Link value offset:",
-                       (unsigned long)(ent->cache.slink.lval_offset));
+                      "Link value offset:",
+                      (unsigned long)(ent->cache.slink.lval_offset));
             if(heap) {
                 lval = (const char *)H5HL_offset_into(heap, ent->cache.slink.lval_offset);
                 HDfprintf(stream, "%*s%-*s %s\n", nested_indent, "", nested_fwidth,
-                           "Link value:",
-                           lval);
+                          "Link value:",
+                          (lval == NULL) ? "" : lval);
             } /* end if */
             else
                 HDfprintf(stream, "%*s%-*s\n", nested_indent, "", nested_fwidth, "Warning: Invalid heap address given, name not displayed!");
diff --git a/src/H5Gint.c b/src/H5Gint.c
index 72cc1a4..3b5de44 100644
--- a/src/H5Gint.c
+++ b/src/H5Gint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -68,8 +66,6 @@ typedef struct {
 typedef struct {
     hid_t       gid;            /* The group ID for the starting group */
     H5G_loc_t	*curr_loc;      /* Location of starting group */
-    hid_t       lapl_id;        /* LAPL for walking across links */
-    hid_t       dxpl_id; 	/* DXPL for operations */
     H5_index_t  idx_type;       /* Index to use */
     H5_iter_order_t order;      /* Iteration order within index */
     H5SL_t     *visited;        /* Skip list for tracking visited nodes */
@@ -90,7 +86,7 @@ typedef struct {
 /* Local Prototypes */
 /********************/
 
-static herr_t H5G_open_oid(H5G_t *grp, hid_t dxpl_id);
+static herr_t H5G__open_oid(H5G_t *grp);
 
 
 /*********************/
@@ -132,21 +128,19 @@ H5FL_DEFINE(H5_obj_t);
  */
 H5G_t *
 H5G__create_named(const H5G_loc_t *loc, const char *name, hid_t lcpl_id,
-    hid_t gcpl_id, hid_t gapl_id, hid_t dxpl_id)
+    hid_t gcpl_id)
 {
     H5O_obj_create_t ocrt_info;         /* Information for object creation */
     H5G_obj_create_t gcrt_info;         /* Information for group creation */
     H5G_t *ret_value = NULL;            /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Check arguments */
     HDassert(loc);
     HDassert(name && *name);
     HDassert(lcpl_id != H5P_DEFAULT);
     HDassert(gcpl_id != H5P_DEFAULT);
-    HDassert(gapl_id != H5P_DEFAULT);
-    HDassert(dxpl_id != H5P_DEFAULT);
 
     /* Set up group creation info */
     gcrt_info.gcpl_id = gcpl_id;
@@ -159,7 +153,7 @@ H5G__create_named(const H5G_loc_t *loc, const char *name, hid_t lcpl_id,
     ocrt_info.new_obj = NULL;
 
     /* Create the new group and link it to its parent group */
-    if(H5L_link_object(loc, name, &ocrt_info, lcpl_id, gapl_id, dxpl_id) < 0)
+    if(H5L_link_object(loc, name, &ocrt_info, lcpl_id) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "unable to create and link to group")
     HDassert(ocrt_info.new_obj);
 
@@ -167,11 +161,48 @@ H5G__create_named(const H5G_loc_t *loc, const char *name, hid_t lcpl_id,
     ret_value = (H5G_t *)ocrt_info.new_obj;
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5G__create_named() */
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5G__create_anon
+ *
+ * Purpose:     Internal routine to create a new anonymous group.
+ *
+ * Note:        This routine is needed so that there's a non-API routine for
+ *              creating groups that can set up VOL / SWMR info
+ *              (which need a DXPL).
+ *
+ * Return:      Success:    Non-NULL, pointer to new group object.
+ *              Failure:    NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		December 17, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+H5G_t *
+H5G__create_anon(H5F_t *file, H5G_obj_create_t *gcrt_info)
+{
+    H5G_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(file);
+    HDassert(gcrt_info);
+
+    /* Create the new group & get its ID */
+    if(NULL == (ret_value = H5G__create(file, gcrt_info)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTCREATE, NULL, "unable to create group")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__create_anon() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5G__create
  *
  * Purpose:	Creates a new empty group with the specified name. The name
@@ -190,7 +221,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5G_t *
-H5G__create(H5F_t *file, H5G_obj_create_t *gcrt_info, hid_t dxpl_id)
+H5G__create(H5F_t *file, H5G_obj_create_t *gcrt_info)
 {
     H5G_t	*grp = NULL;	/*new group			*/
     unsigned    oloc_init = 0;  /* Flag to indicate that the group object location was created successfully */
@@ -201,7 +232,6 @@ H5G__create(H5F_t *file, H5G_obj_create_t *gcrt_info, hid_t dxpl_id)
     /* check args */
     HDassert(file);
     HDassert(gcrt_info->gcpl_id != H5P_DEFAULT);
-    HDassert(dxpl_id != H5P_DEFAULT);
 
     /* create an open group */
     if(NULL == (grp = H5FL_CALLOC(H5G_t)))
@@ -210,7 +240,7 @@ H5G__create(H5F_t *file, H5G_obj_create_t *gcrt_info, hid_t dxpl_id)
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Create the group object header */
-    if(H5G__obj_create(file, dxpl_id, gcrt_info, &(grp->oloc)/*out*/) < 0)
+    if(H5G__obj_create(file, gcrt_info, &(grp->oloc)/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "unable to create group object header")
     oloc_init = 1;    /* Indicate that the object location information is valid */
 
@@ -230,11 +260,11 @@ done:
     if(ret_value == NULL) {
         /* Check if we need to release the file-oriented symbol table info */
         if(oloc_init) {
-            if(H5O_dec_rc_by_loc(&(grp->oloc), dxpl_id) < 0)
+            if(H5O_dec_rc_by_loc(&(grp->oloc)) < 0)
                 HDONE_ERROR(H5E_SYM, H5E_CANTDEC, NULL, "unable to decrement refcount on newly created object")
             if(H5O_close(&(grp->oloc), NULL) < 0)
                 HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, NULL, "unable to release object header")
-            if(H5O_delete(file, dxpl_id, grp->oloc.addr) < 0)
+            if(H5O_delete(file, grp->oloc.addr) < 0)
                 HDONE_ERROR(H5E_SYM, H5E_CANTDELETE, NULL, "unable to delete object header")
         } /* end if */
         if(grp != NULL) {
@@ -262,8 +292,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5G_t *
-H5G__open_name(const H5G_loc_t *loc, const char *name, hid_t gapl_id,
-    hid_t dxpl_id)
+H5G__open_name(const H5G_loc_t *loc, const char *name)
 {
     H5G_t      *grp = NULL;             /* Group to open */
     H5G_loc_t   grp_loc;                /* Location used to open group */
@@ -273,7 +302,7 @@ H5G__open_name(const H5G_loc_t *loc, const char *name, hid_t gapl_id,
     H5O_type_t  obj_type;               /* Type of object at location */
     H5G_t *ret_value = NULL;            /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Check args */
     HDassert(loc);
@@ -284,31 +313,30 @@ H5G__open_name(const H5G_loc_t *loc, const char *name, hid_t gapl_id,
     grp_loc.path = &grp_path;
     H5G_loc_reset(&grp_loc);
 
-    /* Find the group object using the gapl passed in */
-    if(H5G_loc_find(loc, name, &grp_loc/*out*/, gapl_id, dxpl_id) < 0)
+    /* Find the group object */
+    if(H5G_loc_find(loc, name, &grp_loc/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, NULL, "group not found")
     loc_found = TRUE;
 
     /* Check that the object found is the correct type */
-    if(H5O_obj_type(&grp_oloc, &obj_type, dxpl_id) < 0)
+    if(H5O_obj_type(&grp_oloc, &obj_type) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, NULL, "can't get object type")
     if(obj_type != H5O_TYPE_GROUP)
         HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, NULL, "not a group")
 
     /* Open the group */
-    if((grp = H5G_open(&grp_loc, dxpl_id)) == NULL)
+    if(NULL == (grp = H5G_open(&grp_loc)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, NULL, "unable to open group")
 
     /* Set return value */
     ret_value = grp;
 
 done:
-    if(!ret_value) {
+    if(!ret_value)
         if(loc_found && H5G_loc_free(&grp_loc) < 0)
             HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, NULL, "can't free location")
-    } /* end if */
 
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5G__open_name() */
 
 
@@ -328,7 +356,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5G_t *
-H5G_open(const H5G_loc_t *loc, hid_t dxpl_id)
+H5G_open(const H5G_loc_t *loc)
 {
     H5G_t           *grp = NULL;        /* Group opened */
     H5G_shared_t    *shared_fo;         /* Shared group object */
@@ -356,7 +384,7 @@ H5G_open(const H5G_loc_t *loc, hid_t dxpl_id)
         H5E_clear_stack(NULL);
 
         /* Open the group object */
-        if(H5G_open_oid(grp, dxpl_id) < 0)
+        if(H5G__open_oid(grp) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, NULL, "not found")
 
         /* Add group to list of open objects in file */
@@ -406,7 +434,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_open_oid
+ * Function:	H5G__open_oid
  *
  * Purpose:	Opens an existing group.  The group should eventually be
  *		closed by calling H5G_close().
@@ -421,12 +449,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_open_oid(H5G_t *grp, hid_t dxpl_id)
+H5G__open_oid(H5G_t *grp)
 {
     hbool_t             obj_opened = FALSE;
     herr_t		ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check args */
     HDassert(grp);
@@ -441,8 +469,8 @@ H5G_open_oid(H5G_t *grp, hid_t dxpl_id)
     obj_opened = TRUE;
 
     /* Check if this object has the right message(s) to be treated as a group */
-    if((H5O_msg_exists(&(grp->oloc), H5O_STAB_ID, dxpl_id) <= 0)
-            && (H5O_msg_exists(&(grp->oloc), H5O_LINFO_ID, dxpl_id) <= 0))
+    if((H5O_msg_exists(&(grp->oloc), H5O_STAB_ID) <= 0)
+            && (H5O_msg_exists(&(grp->oloc), H5O_LINFO_ID) <= 0))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "not a group")
 
 done:
@@ -454,7 +482,39 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_open_oid() */
+} /* end H5G__open_oid() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5G__close_cb
+ *
+ * Purpose:	Closes the specified group.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		Sunday, February 18, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5G__close_cb(H5G_t *grp)
+{
+    herr_t ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check args */
+    HDassert(grp && grp->shared);
+    HDassert(grp->shared->fo_count > 0);
+
+    /* Call actual group close routine */
+    if(H5G_close(grp) < 0)
+        HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEOBJ, FAIL, "problem closing group")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__close_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -497,16 +557,16 @@ H5G_close(H5G_t *grp)
         /* Remove the group from the list of opened objects in the file */
         if(H5FO_top_decr(grp->oloc.file, grp->oloc.addr) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't decrement count for object")
-        if(H5FO_delete(grp->oloc.file, H5AC_ind_read_dxpl_id, grp->oloc.addr) < 0)
+        if(H5FO_delete(grp->oloc.file, grp->oloc.addr) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't remove group from list of open objects")
         if(H5O_close(&(grp->oloc), &file_closed) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to close")
 
         /* Evict group metadata if evicting on close */
         if(!file_closed && H5F_SHARED(grp->oloc.file) && H5F_EVICT_ON_CLOSE(grp->oloc.file)) {
-            if(H5AC_flush_tagged_metadata(grp->oloc.file, grp->oloc.addr, H5AC_ind_read_dxpl_id) < 0) 
+            if(H5AC_flush_tagged_metadata(grp->oloc.file, grp->oloc.addr) < 0) 
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to flush tagged metadata")
-            if(H5AC_evict_tagged_metadata(grp->oloc.file, grp->oloc.addr, FALSE, H5AC_ind_read_dxpl_id) < 0) 
+            if(H5AC_evict_tagged_metadata(grp->oloc.file, grp->oloc.addr, FALSE) < 0) 
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTFLUSH, FAIL, "unable to evict tagged metadata")
         } /* end if */
 
@@ -528,7 +588,8 @@ H5G_close(H5G_t *grp)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "problem attempting to free location")
 
         /* If this group is a mount point and the mount point is the last open
-         * reference to the group, then attempt to close down the file hierarchy
+         * reference to the group (i.e. fo_count == 1 now), then attempt to
+         * close down the file hierarchy
          */
         if(grp->shared->mounted && grp->shared->fo_count == 1) {
             /* Attempt to close down the file hierarchy */
@@ -796,7 +857,7 @@ done:
 herr_t
 H5G_iterate(hid_t loc_id, const char *group_name,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
-    const H5G_link_iterate_t *lnk_op, void *op_data, hid_t lapl_id, hid_t dxpl_id)
+    const H5G_link_iterate_t *lnk_op, void *op_data)
 {
     H5G_loc_t	loc;            /* Location of parent for group */
     hid_t gid = -1;             /* ID of group to iterate over */
@@ -817,7 +878,7 @@ H5G_iterate(hid_t loc_id, const char *group_name,
      */
     if(H5G_loc(loc_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(NULL == (grp = H5G__open_name(&loc, group_name, lapl_id, dxpl_id)))
+    if(NULL == (grp = H5G__open_name(&loc, group_name)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
     if((gid = H5I_register(H5I_GROUP, grp, TRUE)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register group")
@@ -828,7 +889,7 @@ H5G_iterate(hid_t loc_id, const char *group_name,
     udata.op_data = op_data;
 
     /* Call the real group iteration routine */
-    if((ret_value = H5G__obj_iterate(&(grp->oloc), idx_type, order, skip, last_lnk, H5G_iterate_cb, &udata, dxpl_id)) < 0)
+    if((ret_value = H5G__obj_iterate(&(grp->oloc), idx_type, order, skip, last_lnk, H5G_iterate_cb, &udata)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "error iterating over links")
 
 done:
@@ -937,7 +998,7 @@ H5G_visit_cb(const H5O_link_t *lnk, void *_udata)
 
         /* Find the object using the LAPL passed in */
         /* (Correctly handles mounted files) */
-        if(H5G_loc_find(udata->curr_loc, lnk->name, &obj_loc/*out*/, udata->lapl_id, udata->dxpl_id) < 0)
+        if(H5G_loc_find(udata->curr_loc, lnk->name, &obj_loc/*out*/) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5_ITER_ERROR, "object not found")
         obj_found = TRUE;
 
@@ -951,7 +1012,7 @@ H5G_visit_cb(const H5O_link_t *lnk, void *_udata)
             unsigned rc;		/* Reference count of object    */
 
             /* Get the object's reference count and type */
-            if(H5O_get_rc_and_type(&obj_oloc, udata->dxpl_id, &rc, &otype) < 0)
+            if(H5O_get_rc_and_type(&obj_oloc, &rc, &otype) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5_ITER_ERROR, "unable to get object info")
 
             /* If its ref count is > 1, we add it to the list of visited objects */
@@ -984,7 +1045,7 @@ H5G_visit_cb(const H5O_link_t *lnk, void *_udata)
                 udata->curr_path_len++;
 
                 /* Attempt to get the link info for this group */
-                if((linfo_exists = H5G__obj_get_linfo(&obj_oloc, &linfo, udata->dxpl_id)) < 0)
+                if((linfo_exists = H5G__obj_get_linfo(&obj_oloc, &linfo)) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5_ITER_ERROR, "can't check for link info message")
                 if(linfo_exists) {
                     /* Check for creation order tracking, if creation order index lookup requested */
@@ -1008,7 +1069,7 @@ H5G_visit_cb(const H5O_link_t *lnk, void *_udata)
                 udata->curr_loc = &obj_loc;
 
                 /* Iterate over links in group */
-                ret_value = H5G__obj_iterate(&obj_oloc, idx_type, udata->order, (hsize_t)0, NULL, H5G_visit_cb, udata, udata->dxpl_id);
+                ret_value = H5G__obj_iterate(&obj_oloc, idx_type, udata->order, (hsize_t)0, NULL, H5G_visit_cb, udata);
 
                 /* Restore location */
                 udata->curr_loc = old_loc;
@@ -1061,8 +1122,7 @@ done:
  */
 herr_t
 H5G_visit(hid_t loc_id, const char *group_name, H5_index_t idx_type,
-    H5_iter_order_t order, H5L_iterate_t op, void *op_data, hid_t lapl_id,
-    hid_t dxpl_id)
+    H5_iter_order_t order, H5L_iterate_t op, void *op_data)
 {
     H5G_iter_visit_ud_t udata;      /* User data for callback */
     H5O_linfo_t	linfo;		    /* Link info message */
@@ -1084,7 +1144,7 @@ H5G_visit(hid_t loc_id, const char *group_name, H5_index_t idx_type,
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
     /* Open the group to begin visiting within */
-    if((grp = H5G__open_name(&loc, group_name, lapl_id, dxpl_id)) == NULL)
+    if(NULL == (grp = H5G__open_name(&loc, group_name)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
 
     /* Register an ID for the starting group */
@@ -1098,8 +1158,6 @@ H5G_visit(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     /* Set up user data */
     udata.gid = gid;
     udata.curr_loc = &start_loc;
-    udata.lapl_id = lapl_id;
-    udata.dxpl_id = dxpl_id;
     udata.idx_type = idx_type;
     udata.order = order;
     udata.op = op;
@@ -1116,7 +1174,7 @@ H5G_visit(hid_t loc_id, const char *group_name, H5_index_t idx_type,
         HGOTO_ERROR(H5E_SYM, H5E_CANTCREATE, FAIL, "can't create skip list for visited objects")
 
     /* Get the group's reference count */
-    if(H5O_get_rc_and_type(&grp->oloc, dxpl_id, &rc, NULL) < 0)
+    if(H5O_get_rc_and_type(&grp->oloc, &rc, NULL) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get object info")
 
     /* If its ref count is > 1, we add it to the list of visited objects */
@@ -1138,7 +1196,7 @@ H5G_visit(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     } /* end if */
 
     /* Attempt to get the link info for this group */
-    if((linfo_exists = H5G__obj_get_linfo(&(grp->oloc), &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(&(grp->oloc), &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Check for creation order tracking, if creation order index lookup requested */
@@ -1159,7 +1217,7 @@ H5G_visit(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     } /* end if */
 
     /* Call the link iteration routine */
-    if((ret_value = H5G__obj_iterate(&(grp->oloc), idx_type, order, (hsize_t)0, NULL, H5G_visit_cb, &udata, dxpl_id)) < 0)
+    if((ret_value = H5G__obj_iterate(&(grp->oloc), idx_type, order, (hsize_t)0, NULL, H5G_visit_cb, &udata)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "can't visit links")
 
 done:
@@ -1181,6 +1239,44 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5G__get_create_plist
+ *
+ * Purpose:     Internal routine to retrieve a group's creation property list.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	ID for a copy of the group creation property
+ *				list.  The property list ID should be released
+ *				by calling H5Pclose().
+ *
+ *		Failure:	H5I_INVALID_HID
+ *
+ * Programmer:	Quincey Koziol
+ *		December 17, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5G__get_create_plist(const H5G_t *grp)
+{
+    hid_t ret_value = H5I_INVALID_HID;  /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(grp);
+
+    /* Retrieve the GCPL */
+    if((ret_value = H5G_get_create_plist(grp)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5I_INVALID_HID, "can't get group's creation property list")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_create_plist() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5G_get_create_plist
  *
  * Purpose:	Private function for H5Gget_create_plist
@@ -1189,7 +1285,7 @@ done:
  *				property list.  The property list ID should be
  *				released by calling H5Pclose().
  *
- *		Failure:	FAIL
+ *		Failure:	H5I_INVALID_HID
  *
  * Programmer:	Quincey Koziol
  *		Tuesday, October 25, 2005
@@ -1197,7 +1293,7 @@ done:
  *-------------------------------------------------------------------------
  */
 hid_t
-H5G_get_create_plist(H5G_t *grp)
+H5G_get_create_plist(const H5G_t *grp)
 {
     H5O_linfo_t         linfo;		        /* Link info message            */
     htri_t	        ginfo_exists;
@@ -1205,60 +1301,60 @@ H5G_get_create_plist(H5G_t *grp)
     htri_t              pline_exists;
     H5P_genplist_t      *gcpl_plist;
     H5P_genplist_t      *new_plist;
-    hid_t		new_gcpl_id = FAIL;
-    hid_t		ret_value = FAIL;
+    hid_t		new_gcpl_id = H5I_INVALID_HID;
+    hid_t		ret_value = H5I_INVALID_HID;
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_NOAPI(H5I_INVALID_HID)
 
     /* Copy the default group creation property list */
     if(NULL == (gcpl_plist = (H5P_genplist_t *)H5I_object(H5P_LST_GROUP_CREATE_ID_g)))
-         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get default group creation property list")
+         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "can't get default group creation property list")
     if((new_gcpl_id = H5P_copy_plist(gcpl_plist, TRUE)) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to copy the creation property list")
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5I_INVALID_HID, "unable to copy the creation property list")
     if(NULL == (new_plist = (H5P_genplist_t *)H5I_object(new_gcpl_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "can't get property list")
 
     /* Retrieve any object creation properties */
-    if(H5O_get_create_plist(&grp->oloc, H5AC_ind_read_dxpl_id, new_plist) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object creation info")
+    if(H5O_get_create_plist(&grp->oloc, new_plist) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5I_INVALID_HID, "can't get object creation info")
 
     /* Check for the group having a group info message */
-    if((ginfo_exists = H5O_msg_exists(&(grp->oloc), H5O_GINFO_ID, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
+    if((ginfo_exists = H5O_msg_exists(&(grp->oloc), H5O_GINFO_ID)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5I_INVALID_HID, "unable to read object header")
     if(ginfo_exists) {
         H5O_ginfo_t ginfo;		/* Group info message            */
 
         /* Read the group info */
-        if(NULL == H5O_msg_read(&(grp->oloc), H5O_GINFO_ID, &ginfo, H5AC_ind_read_dxpl_id))
-            HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get group info")
+        if(NULL == H5O_msg_read(&(grp->oloc), H5O_GINFO_ID, &ginfo))
+            HGOTO_ERROR(H5E_SYM, H5E_BADMESG, H5I_INVALID_HID, "can't get group info")
 
         /* Set the group info for the property list */
         if(H5P_set(new_plist, H5G_CRT_GROUP_INFO_NAME, &ginfo) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set group info")
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, H5I_INVALID_HID, "can't set group info")
     } /* end if */
 
     /* Check for the group having a link info message */
-    if((linfo_exists = H5G__obj_get_linfo(&(grp->oloc), &linfo, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
+    if((linfo_exists = H5G__obj_get_linfo(&(grp->oloc), &linfo)) < 0)
+	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5I_INVALID_HID, "unable to read object header")
     if(linfo_exists) {
         /* Set the link info for the property list */
         if(H5P_set(new_plist, H5G_CRT_LINK_INFO_NAME, &linfo) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set link info")
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, H5I_INVALID_HID, "can't set link info")
     } /* end if */
 
     /* Check for the group having a pipeline message */
-    if((pline_exists = H5O_msg_exists(&(grp->oloc), H5O_PLINE_ID, H5AC_ind_read_dxpl_id)) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to read object header")
+    if((pline_exists = H5O_msg_exists(&(grp->oloc), H5O_PLINE_ID)) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5I_INVALID_HID, "unable to read object header")
     if(pline_exists) {
         H5O_pline_t pline;      /* Pipeline message */
 
         /* Read the pipeline */
-        if(NULL == H5O_msg_read(&(grp->oloc), H5O_PLINE_ID, &pline, H5AC_ind_read_dxpl_id))
-            HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get link pipeline")
+        if(NULL == H5O_msg_read(&(grp->oloc), H5O_PLINE_ID, &pline))
+            HGOTO_ERROR(H5E_SYM, H5E_BADMESG, H5I_INVALID_HID, "can't get link pipeline")
 
         /* Set the pipeline for the property list */
         if(H5P_poke(new_plist, H5O_CRT_PIPELINE_NAME, &pline) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set link pipeline")
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, H5I_INVALID_HID, "can't set link pipeline")
     } /* end if */
 
     /* Set the return value */
@@ -1268,8 +1364,224 @@ done:
     if(ret_value < 0) {
         if(new_gcpl_id > 0)
             if(H5I_dec_app_ref(new_gcpl_id) < 0)
-                HDONE_ERROR(H5E_SYM, H5E_CANTDEC, FAIL, "can't free")
+                HDONE_ERROR(H5E_SYM, H5E_CANTDEC, H5I_INVALID_HID, "can't free")
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5G_get_create_plist() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5G__get_info
+ *
+ * Purpose:     Internal routine to retrieve the info for a group.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5G__get_info(const H5G_loc_t *loc, H5G_info_t *grp_info)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(grp_info);
+
+    /* Retrieve the group's information */
+    if(H5G__obj_info(loc->oloc, grp_info) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve group info")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5G__get_info_by_name
+ *
+ * Purpose:     Internal routine to retrieve the info for a group, by name.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5G__get_info_by_name(const H5G_loc_t *loc, const char *name, H5G_info_t *grp_info)
+{
+    H5G_loc_t   grp_loc;                /* Location used to open group */
+    H5G_name_t  grp_path;            	/* Opened object group hier. path */
+    H5O_loc_t   grp_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Location at 'name' found */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(grp_info);
+
+    /* Set up opened group location to fill in */
+    grp_loc.oloc = &grp_oloc;
+    grp_loc.path = &grp_path;
+    H5G_loc_reset(&grp_loc);
+
+    /* Find the group object */
+    if(H5G_loc_find(loc, name, &grp_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
+    loc_found = TRUE;
+
+    /* Retrieve the group's information */
+    if(H5G__obj_info(grp_loc.oloc, grp_info/*out*/) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve group info")
+
+done:
+    /* Clean up */
+    if(loc_found && H5G_loc_free(&grp_loc) < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_info_by_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5G__get_info_by_idx
+ *
+ * Purpose:     Internal routine to retrieve the info for a group, by index.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5G__get_info_by_idx(const H5G_loc_t *loc, const char *group_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, H5G_info_t *grp_info)
+{
+    H5G_loc_t   grp_loc;                /* Location used to open group */
+    H5G_name_t  grp_path;            	/* Opened object group hier. path */
+    H5O_loc_t   grp_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Location at 'name' found */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(grp_info);
+
+    /* Set up opened group location to fill in */
+    grp_loc.oloc = &grp_oloc;
+    grp_loc.path = &grp_path;
+    H5G_loc_reset(&grp_loc);
+
+    /* Find the object's location, according to the order in the index */
+    if(H5G_loc_find_by_idx(loc, group_name, idx_type, order, n, &grp_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group not found")
+    loc_found = TRUE;
+
+    /* Retrieve the group's information */
+    if(H5G__obj_info(grp_loc.oloc, grp_info/*out*/) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve group info")
+
+done:
+    /* Clean up */
+    if(loc_found && H5G_loc_free(&grp_loc) < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5G__get_info_by_idx() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5G__flush
+ *
+ * Purpose:     Internal routine to flushes a group to disk.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:      Success:    Non-negative
+ *              Failure:    Negative
+ *
+ * Programmer:  Quincey Koziol
+ *              December 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5G__flush(H5G_t *grp, hid_t group_id)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(grp);
+
+    /* Flush metadata to file */
+    if(H5O_flush_common(&grp->oloc, group_id) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTFLUSH, FAIL, "unable to flush group and object flush callback")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5G__flush */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5G__refresh
+ *
+ * Purpose:     Internal routine to refresh a group.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:      Success:    Non-negative
+ *              Failure:    Negative
+ *
+ * Programmer:  Quincey Koziol
+ *              December 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5G__refresh(H5G_t *grp, hid_t group_id)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(grp);
+
+    /* Call private function to refresh group object */
+    if((H5O_refresh_metadata(group_id, grp->oloc)) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to refresh group")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5G__refresh */
+
diff --git a/src/H5Glink.c b/src/H5Glink.c
index 5a195c8..509e511 100644
--- a/src/H5Glink.c
+++ b/src/H5Glink.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -226,7 +224,10 @@ herr_t
 H5G__ent_to_link(H5O_link_t *lnk, const H5HL_t *heap,
     const H5G_entry_t *ent, const char *name)
 {
-    FUNC_ENTER_PACKAGE_NOERR
+    hbool_t dup_soft = FALSE;           /* xstrdup the symbolic link name or not */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE
 
     /* check arguments */
     HDassert(lnk);
@@ -238,18 +239,21 @@ H5G__ent_to_link(H5O_link_t *lnk, const H5HL_t *heap,
     lnk->cset = H5F_DEFAULT_CSET;
     lnk->corder = 0;
     lnk->corder_valid = FALSE;       /* Creation order not valid for this link */
-    lnk->name = H5MM_xstrdup(name);
-    HDassert(lnk->name);
+    if((lnk->name = H5MM_xstrdup(name)) == NULL)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to duplicate link name")
 
     /* Object is a symbolic or hard link */
     if(ent->type == H5G_CACHED_SLINK) {
         const char *s;          /* Pointer to link value */
 
-        s = (const char *)H5HL_offset_into(heap, ent->cache.slink.lval_offset);
-        HDassert(s);
+        if((s = (const char *)H5HL_offset_into(heap, ent->cache.slink.lval_offset)) == NULL)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get symbolic link name")
 
         /* Copy the link value */
-        lnk->u.soft.name = H5MM_xstrdup(s);
+        if((lnk->u.soft.name = H5MM_xstrdup(s)) == NULL)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to duplicate symbolic link name")
+
+        dup_soft = TRUE;
 
         /* Set link type */
         lnk->type = H5L_TYPE_SOFT;
@@ -262,7 +266,14 @@ H5G__ent_to_link(H5O_link_t *lnk, const H5HL_t *heap,
         lnk->type = H5L_TYPE_HARD;
     } /* end else */
 
-    FUNC_LEAVE_NOAPI(SUCCEED)
+done:
+    if(ret_value < 0) {
+        if(lnk->name)
+            H5MM_xfree(lnk->name);
+        if(ent->type == H5G_CACHED_SLINK && dup_soft)
+            H5MM_xfree(lnk->u.soft.name);
+    }
+    FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5G__ent_to_link() */
 
 
@@ -542,8 +553,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__link_name_replace(H5F_t *file, hid_t dxpl_id, H5RS_str_t *grp_full_path_r,
-    const H5O_link_t *lnk)
+H5G__link_name_replace(H5F_t *file, H5RS_str_t *grp_full_path_r, const H5O_link_t *lnk)
 {
     H5RS_str_t *obj_path_r = NULL;      /* Full path for link being removed */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -556,7 +566,7 @@ H5G__link_name_replace(H5F_t *file, hid_t dxpl_id, H5RS_str_t *grp_full_path_r,
     /* Search the open IDs and replace names for unlinked object */
     if(grp_full_path_r) {
         obj_path_r = H5G_build_fullpath_refstr_str(grp_full_path_r, lnk->name);
-        if(H5G_name_replace(lnk, H5G_NAME_DELETE, file, obj_path_r, NULL, NULL, dxpl_id) < 0)
+        if(H5G_name_replace(lnk, H5G_NAME_DELETE, file, obj_path_r, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to replace name")
     } /* end if */
 
diff --git a/src/H5Gloc.c b/src/H5Gloc.c
index 3fcbd09..7273a89 100644
--- a/src/H5Gloc.c
+++ b/src/H5Gloc.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -67,8 +65,6 @@ typedef struct {
 /* User data for looking up an object in a group by index */
 typedef struct {
     /* downward */
-    hid_t lapl_id;              /* LAPL to use for operation */
-    hid_t dxpl_id;              /* DXPL to use for operation */
     H5_index_t idx_type;        /* Index to use */
     H5_iter_order_t order;      /* Iteration order within index */
     hsize_t n;                  /* Offset within index */
@@ -80,7 +76,6 @@ typedef struct {
 /* User data for getting an object's info in a group */
 typedef struct {
     /* downward */
-    hid_t dxpl_id;              /* DXPL to use for operation */
     hbool_t want_ih_info;       /* Whether to retrieve the index & heap info */
 
     /* upward */
@@ -90,7 +85,6 @@ typedef struct {
 /* User data for setting an object's comment in a group */
 typedef struct {
     /* downward */
-    hid_t dxpl_id;              /* DXPL to use for operation */
     const char *comment;        /* Object comment buffer */
 
     /* upward */
@@ -99,7 +93,6 @@ typedef struct {
 /* User data for getting an object's comment in a group */
 typedef struct {
     /* downward */
-    hid_t dxpl_id;              /* DXPL to use for operation */
     char  *comment;             /* Object comment buffer */
     size_t bufsize;             /* Size of object comment buffer */
 
@@ -113,16 +106,16 @@ typedef struct {
 /********************/
 
 /* Group traversal callbacks */
-static herr_t H5G_loc_find_cb(H5G_loc_t *grp_loc, const char *name,
+static herr_t H5G__loc_find_cb(H5G_loc_t *grp_loc, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata,
     H5G_own_loc_t *own_loc);
-static herr_t H5G_loc_find_by_idx_cb(H5G_loc_t *grp_loc, const char *name,
+static herr_t H5G__loc_find_by_idx_cb(H5G_loc_t *grp_loc, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata,
     H5G_own_loc_t *own_loc);
-static herr_t H5G_loc_set_comment_cb(H5G_loc_t *grp_loc, const char *name,
+static herr_t H5G__loc_set_comment_cb(H5G_loc_t *grp_loc, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata,
     H5G_own_loc_t *own_loc);
-static herr_t H5G_loc_get_comment_cb(H5G_loc_t *grp_loc, const char *name,
+static herr_t H5G__loc_get_comment_cb(H5G_loc_t *grp_loc, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata,
     H5G_own_loc_t *own_loc);
 
@@ -359,7 +352,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_loc_find_cb
+ * Function:	H5G__loc_find_cb
  *
  * Purpose:	Callback for retrieving object location for an object in a group
  *
@@ -371,14 +364,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_loc_find_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name,
+H5G__loc_find_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
     H5G_loc_fnd_t *udata = (H5G_loc_fnd_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid object */
     if(obj_loc == NULL)
@@ -393,7 +386,7 @@ H5G_loc_find_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_loc_find_cb() */
+} /* end H5G__loc_find_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -409,8 +402,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G_loc_find(const H5G_loc_t *loc, const char *name, H5G_loc_t *obj_loc/*out*/,
-    hid_t lapl_id, hid_t dxpl_id)
+H5G_loc_find(const H5G_loc_t *loc, const char *name, H5G_loc_t *obj_loc/*out*/)
 {
     H5G_loc_fnd_t udata;                /* User data for traversal callback */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -426,7 +418,7 @@ H5G_loc_find(const H5G_loc_t *loc, const char *name, H5G_loc_t *obj_loc/*out*/,
     udata.loc = obj_loc;
 
     /* Traverse group hierarchy to locate object */
-    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G_loc_find_cb, &udata, lapl_id, dxpl_id) < 0)
+    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G__loc_find_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't find object")
 
 done:
@@ -435,7 +427,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_loc_find_by_idx_cb
+ * Function:	H5G__loc_find_by_idx_cb
  *
  * Purpose:	Callback for retrieving object location for an object in a group
  *              according to the order within an index
@@ -448,27 +440,25 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_loc_find_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
+H5G__loc_find_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
     H5G_loc_fbi_t *udata = (H5G_loc_fbi_t *)_udata;   /* User data passed in */
     H5O_link_t fnd_lnk;                 /* Link within group */
     hbool_t lnk_copied = FALSE;         /* Whether the link was copied */
-    size_t links_left = H5L_NUM_LINKS;  /* # of links left to traverse */
     hbool_t obj_loc_valid = FALSE;      /* Flag to indicate that the object location is valid */
     hbool_t obj_exists = FALSE;         /* Whether the object exists (unused) */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid link */
     if(obj_loc == NULL)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group doesn't exist")
 
     /* Query link */
-    if(H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order,
-                udata->n, &fnd_lnk, udata->dxpl_id) < 0)
+    if(H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, &fnd_lnk) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "link not found")
     lnk_copied = TRUE;
 
@@ -480,7 +470,7 @@ H5G_loc_find_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_AT
     /* Perform any special traversals that the link needs */
     /* (soft links, user-defined links, file mounting, etc.) */
     /* (may modify the object location) */
-    if(H5G__traverse_special(obj_loc, &fnd_lnk, H5G_TARGET_NORMAL, &links_left, TRUE, udata->loc, &obj_exists, udata->lapl_id, udata->dxpl_id) < 0)
+    if(H5G__traverse_special(obj_loc, &fnd_lnk, H5G_TARGET_NORMAL, TRUE, udata->loc, &obj_exists) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_TRAVERSE, FAIL, "special link traversal failed")
 
 done:
@@ -498,7 +488,7 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_loc_find_by_idx_cb() */
+} /* end H5G__loc_find_by_idx_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -514,9 +504,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G_loc_find_by_idx(H5G_loc_t *loc, const char *group_name, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, H5G_loc_t *obj_loc/*out*/, hid_t lapl_id,
-    hid_t dxpl_id)
+H5G_loc_find_by_idx(const H5G_loc_t *loc, const char *group_name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n, H5G_loc_t *obj_loc/*out*/)
 {
     H5G_loc_fbi_t udata;                /* User data for traversal callback */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -529,15 +518,13 @@ H5G_loc_find_by_idx(H5G_loc_t *loc, const char *group_name, H5_index_t idx_type,
     HDassert(obj_loc);
 
     /* Set up user data for locating object */
-    udata.dxpl_id = dxpl_id;
-    udata.lapl_id = lapl_id;
     udata.idx_type = idx_type;
     udata.order = order;
     udata.n = n;
     udata.loc = obj_loc;
 
     /* Traverse group hierarchy to locate object */
-    if(H5G_traverse(loc, group_name, H5G_TARGET_NORMAL, H5G_loc_find_by_idx_cb, &udata, lapl_id, dxpl_id) < 0)
+    if(H5G_traverse(loc, group_name, H5G_TARGET_NORMAL, H5G__loc_find_by_idx_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't find object")
 
 done:
@@ -559,7 +546,7 @@ done:
  */
 herr_t
 H5G__loc_insert(H5G_loc_t *grp_loc, const char *name, H5G_loc_t *obj_loc,
-    H5O_type_t obj_type, const void *crt_info, hid_t dxpl_id)
+    H5O_type_t obj_type, const void *crt_info)
 {
     H5O_link_t  lnk;                    /* Link for object to insert */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -581,8 +568,7 @@ H5G__loc_insert(H5G_loc_t *grp_loc, const char *name, H5G_loc_t *obj_loc,
     lnk.u.hard.addr = obj_loc->oloc->addr;
 
     /* Insert new group into current group's symbol table */
-    if(H5G_obj_insert(grp_loc->oloc, name, &lnk, TRUE, obj_type, crt_info,
-            dxpl_id) < 0)
+    if(H5G_obj_insert(grp_loc->oloc, name, &lnk, TRUE, obj_type, crt_info) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert object")
 
     /* Set the name of the object location */
@@ -646,7 +632,7 @@ H5G_loc_exists_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UN
  *-------------------------------------------------------------------------
  */
 htri_t
-H5G_loc_exists(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id)
+H5G_loc_exists(const H5G_loc_t *loc, const char *name)
 {
     H5G_loc_exists_t udata;     /* User data for traversal callback */
     htri_t ret_value = FAIL;    /* Return value */
@@ -661,7 +647,7 @@ H5G_loc_exists(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl
     udata.exists = FALSE;
 
     /* Traverse group hierarchy to locate object */
-    if(H5G_traverse(loc, name, H5G_TARGET_EXISTS, H5G_loc_exists_cb, &udata, lapl_id, dxpl_id) < 0)
+    if(H5G_traverse(loc, name, H5G_TARGET_EXISTS, H5G_loc_exists_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't check if object exists")
 
     /* Set return value */
@@ -698,7 +684,7 @@ H5G_loc_info_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUS
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "name doesn't exist")
 
     /* Query object information */
-    if(H5O_get_info(obj_loc->oloc, udata->dxpl_id, udata->want_ih_info, udata->oinfo) < 0)
+    if(H5O_get_info(obj_loc->oloc, udata->want_ih_info, udata->oinfo) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object info")
 
 done:
@@ -724,8 +710,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G_loc_info(H5G_loc_t *loc, const char *name, hbool_t want_ih_info, H5O_info_t *oinfo/*out*/,
-    hid_t lapl_id, hid_t dxpl_id)
+H5G_loc_info(const H5G_loc_t *loc, const char *name, hbool_t want_ih_info, H5O_info_t *oinfo/*out*/)
 {
     H5G_loc_info_t udata;               /* User data for traversal callback */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -738,12 +723,11 @@ H5G_loc_info(H5G_loc_t *loc, const char *name, hbool_t want_ih_info, H5O_info_t
     HDassert(oinfo);
 
     /* Set up user data for locating object */
-    udata.dxpl_id = dxpl_id;
     udata.want_ih_info = want_ih_info;
     udata.oinfo = oinfo;
 
     /* Traverse group hierarchy to locate object */
-    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G_loc_info_cb, &udata, lapl_id, dxpl_id) < 0)
+    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G_loc_info_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't find object")
 
 done:
@@ -752,7 +736,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_loc_set_comment_cb
+ * Function:	H5G__loc_set_comment_cb
  *
  * Purpose:	Callback for (re)setting object comment for an object in a group
  *
@@ -764,7 +748,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_loc_set_comment_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
+H5G__loc_set_comment_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
     H5G_loc_t *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
 {
     H5G_loc_sc_t *udata = (H5G_loc_sc_t *)_udata;   /* User data passed in */
@@ -772,26 +756,26 @@ H5G_loc_set_comment_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_AT
     htri_t exists;                      /* Whether a "comment" message already exists */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid link */
     if(obj_loc == NULL)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "name doesn't exist")
 
     /* Check for existing comment message */
-    if((exists = H5O_msg_exists(obj_loc->oloc, H5O_NAME_ID, udata->dxpl_id)) < 0)
+    if((exists = H5O_msg_exists(obj_loc->oloc, H5O_NAME_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to read object header")
 
     /* Remove the previous comment message if any */
     if(exists)
-        if(H5O_msg_remove(obj_loc->oloc, H5O_NAME_ID, 0, TRUE, udata->dxpl_id) < 0)
+        if(H5O_msg_remove(obj_loc->oloc, H5O_NAME_ID, 0, TRUE) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete existing comment object header message")
 
     /* Add the new message */
     if(udata->comment && *udata->comment) {
         /* Casting away const OK -QAK */
 	comment.s = (char *)udata->comment;
-	if(H5O_msg_create(obj_loc->oloc, H5O_NAME_ID, 0, H5O_UPDATE_TIME, &comment, udata->dxpl_id) < 0)
+	if(H5O_msg_create(obj_loc->oloc, H5O_NAME_ID, 0, H5O_UPDATE_TIME, &comment) < 0)
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to set comment object header message")
     } /* end if */
 
@@ -801,7 +785,7 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_loc_set_comment_cb() */
+} /* end H5G__loc_set_comment_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -818,8 +802,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G_loc_set_comment(H5G_loc_t *loc, const char *name, const char *comment,
-    hid_t lapl_id, hid_t dxpl_id)
+H5G_loc_set_comment(const H5G_loc_t *loc, const char *name, const char *comment)
 {
     H5G_loc_sc_t udata;         /* User data for traversal callback */
     herr_t ret_value = SUCCEED; /* Return value */
@@ -831,11 +814,10 @@ H5G_loc_set_comment(H5G_loc_t *loc, const char *name, const char *comment,
     HDassert(name && *name);
 
     /* Set up user data for locating object */
-    udata.dxpl_id = dxpl_id;
     udata.comment = comment;
 
     /* Traverse group hierarchy to locate object */
-    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G_loc_set_comment_cb, &udata, lapl_id, dxpl_id) < 0)
+    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G__loc_set_comment_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't find object")
 
 done:
@@ -844,7 +826,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_loc_get_comment_cb
+ * Function:	H5G__loc_get_comment_cb
  *
  * Purpose:	Callback for retrieving object comment for an object in a group
  *
@@ -856,14 +838,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_loc_get_comment_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
+H5G__loc_get_comment_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
     H5G_loc_t *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
 {
     H5G_loc_gc_t *udata = (H5G_loc_gc_t *)_udata;   /* User data passed in */
     H5O_name_t comment;                 /* Object header "comment" message */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid link */
     if(obj_loc == NULL)
@@ -871,11 +853,12 @@ H5G_loc_get_comment_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_AT
 
     /* Query object comment */
     comment.s = NULL;
-    if(NULL == H5O_msg_read(obj_loc->oloc, H5O_NAME_ID, &comment, udata->dxpl_id)) {
+    if(NULL == H5O_msg_read(obj_loc->oloc, H5O_NAME_ID, &comment)) {
 	if(udata->comment && udata->bufsize > 0)
             udata->comment[0] = '\0';
 	udata->comment_size = 0;
-    } else {
+    } /* end if */
+    else {
         if(udata->comment && udata->bufsize)
 	   HDstrncpy(udata->comment, comment.s, udata->bufsize);
 	udata->comment_size = (ssize_t)HDstrlen(comment.s);
@@ -888,7 +871,7 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_loc_get_comment_cb() */
+} /* end H5G__loc_get_comment_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -909,8 +892,8 @@ done:
  *-------------------------------------------------------------------------
  */
 ssize_t
-H5G_loc_get_comment(H5G_loc_t *loc, const char *name, char *comment/*out*/,
-    size_t bufsize, hid_t lapl_id, hid_t dxpl_id)
+H5G_loc_get_comment(const H5G_loc_t *loc, const char *name, char *comment/*out*/,
+    size_t bufsize)
 {
     H5G_loc_gc_t udata;         /* User data for traversal callback */
     ssize_t ret_value = -1;     /* Return value */
@@ -922,13 +905,12 @@ H5G_loc_get_comment(H5G_loc_t *loc, const char *name, char *comment/*out*/,
     HDassert(name && *name);
 
     /* Set up user data for locating object */
-    udata.dxpl_id = dxpl_id;
     udata.comment = comment;
     udata.bufsize = bufsize;
     udata.comment_size = (-1);
 
     /* Traverse group hierarchy to locate object */
-    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G_loc_get_comment_cb, &udata, lapl_id, dxpl_id) < 0)
+    if(H5G_traverse(loc, name, H5G_TARGET_NORMAL, H5G__loc_get_comment_cb, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't find object")
 
     /* Set the return value */
diff --git a/src/H5Gmodule.h b/src/H5Gmodule.h
index 52ac067..19ea982 100644
--- a/src/H5Gmodule.h
+++ b/src/H5Gmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Gname.c b/src/H5Gname.c
index aff9d31..1ca06b9 100644
--- a/src/H5Gname.c
+++ b/src/H5Gname.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -67,8 +65,6 @@ typedef struct H5G_names_t {
 typedef struct H5G_gnba_iter_t {
     /* In */
     const H5O_loc_t *loc; 	/* The location of the object we're looking for */
-    hid_t lapl_id; 		/* LAPL for operations */
-    hid_t dxpl_id; 		/* DXPL for operations */
 
     /* Out */
     char *path;                 /* Name of the object */
@@ -562,7 +558,7 @@ H5G_name_copy(H5G_name_t *dst, const H5G_name_t *src, H5_copy_depth_t depth)
  */
 ssize_t
 H5G_get_name(const H5G_loc_t *loc, char *name/*out*/, size_t size,
-    hbool_t *cached, hid_t lapl_id, hid_t dxpl_id)
+    hbool_t *cached)
 {
     ssize_t len = 0;            /* Length of object's name */
     ssize_t ret_value = -1;     /* Return value */
@@ -595,7 +591,7 @@ H5G_get_name(const H5G_loc_t *loc, char *name/*out*/, size_t size,
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get file ID")
 
         /* Search for name of object */
-        if((len = H5G_get_name_by_addr(file, lapl_id, dxpl_id, loc->oloc, name, size)) < 0) {
+        if((len = H5G_get_name_by_addr(file, loc->oloc, name, size)) < 0) {
             H5I_dec_ref(file);
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't determine name")
         } /* end if */
@@ -1078,8 +1074,7 @@ done:
  */
 herr_t
 H5G_name_replace(const H5O_link_t *lnk, H5G_names_op_t op, H5F_t *src_file,
-    H5RS_str_t *src_full_path_r, H5F_t *dst_file, H5RS_str_t *dst_full_path_r,
-    hid_t dxpl_id)
+    H5RS_str_t *src_full_path_r, H5F_t *dst_file, H5RS_str_t *dst_full_path_r)
 {
     herr_t ret_value = SUCCEED;
 
@@ -1108,7 +1103,7 @@ H5G_name_replace(const H5O_link_t *lnk, H5G_names_op_t op, H5F_t *src_file,
                         tmp_oloc.addr = lnk->u.hard.addr;
 
                         /* Get the type of the object */
-                        if(H5O_obj_type(&tmp_oloc, &obj_type, dxpl_id) < 0)
+                        if(H5O_obj_type(&tmp_oloc, &obj_type) < 0)
                             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object type")
 
                         /* Determine which type of objects to operate on */
@@ -1246,7 +1241,7 @@ H5G_get_name_by_addr_cb(hid_t gid, const char *path, const H5L_info_t *linfo,
         H5G_loc_reset(&obj_loc);
 
         /* Find the object */
-        if(H5G_loc_find(&grp_loc, path, &obj_loc/*out*/, udata->lapl_id, udata->dxpl_id) < 0)
+        if(H5G_loc_find(&grp_loc, path, &obj_loc/*out*/) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5_ITER_ERROR, "object not found")
         obj_found = TRUE;
 
@@ -1285,7 +1280,7 @@ done:
  *-------------------------------------------------------------------------
  */
 ssize_t
-H5G_get_name_by_addr(hid_t file, hid_t lapl_id, hid_t dxpl_id, const H5O_loc_t *loc,
+H5G_get_name_by_addr(hid_t file, const H5O_loc_t *loc,
     char *name, size_t size)
 {
     H5G_gnba_iter_t udata;      /* User data for iteration */
@@ -1312,12 +1307,10 @@ H5G_get_name_by_addr(hid_t file, hid_t lapl_id, hid_t dxpl_id, const H5O_loc_t *
     else {
         /* Set up user data for iterator */
         udata.loc = loc;
-        udata.lapl_id = lapl_id;
-        udata.dxpl_id = dxpl_id;
         udata.path = NULL;
 
         /* Visit all the links in the file */
-        if((status = H5G_visit(file, "/", H5_INDEX_NAME, H5_ITER_NATIVE, H5G_get_name_by_addr_cb, &udata, lapl_id, dxpl_id)) < 0)
+        if((status = H5G_visit(file, "/", H5_INDEX_NAME, H5_ITER_NATIVE, H5G_get_name_by_addr_cb, &udata)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "group traversal failed while looking for object name")
         else if(status > 0)
             found_obj = TRUE;
diff --git a/src/H5Gnode.c b/src/H5Gnode.c
index 89d1df8..2ae3d538 100644
--- a/src/H5Gnode.c
+++ b/src/H5Gnode.c
@@ -5,24 +5,22 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
  *
- * Created:		H5Gnode.c
- *			Jun 26 1997
- *			Robb Matzke <matzke@llnl.gov>
+ * Created:	    H5Gnode.c
+ *              Jun 26 1997
+ *              Robb Matzke <matzke@llnl.gov>
  *
- * Purpose:		Functions for handling symbol table nodes.  A
- *			symbol table node is a small collection of symbol
- *			table entries.	A B-tree usually points to the
- *			symbol table nodes for any given symbol table.
+ * Purpose:     Functions for handling symbol table nodes.  A
+ *              symbol table node is a small collection of symbol
+ *              table entries.	A B-tree usually points to the
+ *              symbol table nodes for any given symbol table.
  *
  *-------------------------------------------------------------------------
  */
@@ -37,16 +35,16 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"	/* Metadata cache			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* File access				*/
-#include "H5FLprivate.h"	/* Free Lists                           */
-#include "H5Gpkg.h"		/* Groups		  		*/
-#include "H5HLprivate.h"	/* Local Heaps				*/
-#include "H5MFprivate.h"	/* File memory management		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Ppublic.h"		/* Property Lists                       */
+#include "H5private.h"      /* Generic Functions        */
+#include "H5ACprivate.h"    /* Metadata cache           */
+#include "H5Eprivate.h"     /* Error handling           */
+#include "H5Fprivate.h"     /* File access              */
+#include "H5FLprivate.h"    /* Free Lists               */
+#include "H5Gpkg.h"         /* Groups                   */
+#include "H5HLprivate.h"    /* Local Heaps              */
+#include "H5MFprivate.h"    /* File memory management   */
+#include "H5MMprivate.h"    /* Memory management        */
+#include "H5Ppublic.h"      /* Property Lists           */
 
 
 /****************/
@@ -78,21 +76,17 @@ typedef struct H5G_node_key_t {
 
 /* B-tree callbacks */
 static H5UC_t *H5G_node_get_shared(const H5F_t *f, const void *_udata);
-static herr_t H5G_node_create(H5F_t *f, hid_t dxpl_id, H5B_ins_t op, void *_lt_key,
-			      void *_udata, void *_rt_key,
-			      haddr_t *addr_p/*out*/);
+static herr_t H5G__node_create(H5F_t *f, H5B_ins_t op, void *_lt_key,
+    void *_udata, void *_rt_key, haddr_t *addr_p/*out*/);
 static int H5G_node_cmp2(void *_lt_key, void *_udata, void *_rt_key);
 static int H5G_node_cmp3(void *_lt_key, void *_udata, void *_rt_key);
-static htri_t H5G_node_found(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void *_lt_key,
-			     void *_udata);
-static H5B_ins_t H5G_node_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key,
-				 hbool_t *lt_key_changed, void *_md_key,
-				 void *_udata, void *_rt_key,
-				 hbool_t *rt_key_changed,
-				 haddr_t *new_node_p/*out*/);
-static H5B_ins_t H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *lt_key,
-				 hbool_t *lt_key_changed, void *udata,
-				 void *rt_key, hbool_t *rt_key_changed);
+static htri_t H5G_node_found(H5F_t *f, haddr_t addr, const void *_lt_key,
+    void *_udata);
+static H5B_ins_t H5G__node_insert(H5F_t *f, haddr_t addr, void *_lt_key,
+    hbool_t *lt_key_changed, void *_md_key, void *_udata, void *_rt_key,
+	hbool_t *rt_key_changed, haddr_t *new_node_p/*out*/);
+static H5B_ins_t H5G_node_remove(H5F_t *f, haddr_t addr, void *lt_key,
+    hbool_t *lt_key_changed, void *udata, void *rt_key, hbool_t *rt_key_changed);
 static herr_t H5G_node_decode_key(const H5B_shared_t *shared, const uint8_t *raw, void *_key);
 static herr_t H5G_node_encode_key(const H5B_shared_t *shared, uint8_t *raw, const void *_key);
 static herr_t H5G_node_debug_key(FILE *stream, int indent, int fwidth,
@@ -105,21 +99,21 @@ static herr_t H5G_node_debug_key(FILE *stream, int indent, int fwidth,
 
 /* H5G inherits B-tree like properties from H5B */
 H5B_class_t H5B_SNODE[1] = {{
-    H5B_SNODE_ID,		/*id			*/
-    sizeof(H5G_node_key_t), 	/*sizeof_nkey		*/
-    H5G_node_get_shared,	/*get_shared		*/
-    H5G_node_create,		/*new			*/
-    H5G_node_cmp2,		/*cmp2			*/
-    H5G_node_cmp3,		/*cmp3			*/
-    H5G_node_found,		/*found			*/
-    H5G_node_insert,		/*insert		*/
-    TRUE,			/*follow min branch?	*/
-    TRUE,			/*follow max branch?	*/
-    H5B_RIGHT,                  /*critical key          */
-    H5G_node_remove,		/*remove		*/
-    H5G_node_decode_key,	/*decode		*/
-    H5G_node_encode_key,	/*encode		*/
-    H5G_node_debug_key		/*debug			*/
+    H5B_SNODE_ID,               /*id            */
+    sizeof(H5G_node_key_t),     /*sizeof_nkey   */
+    H5G_node_get_shared,        /*get_shared    */
+    H5G__node_create,           /*new           */
+    H5G_node_cmp2,              /*cmp2          */
+    H5G_node_cmp3,              /*cmp3          */
+    H5G_node_found,             /*found	        */
+    H5G__node_insert,           /*insert        */
+    TRUE,                       /*follow min branch?    */
+    TRUE,                       /*follow max branch?    */
+    H5B_RIGHT,                  /*critical key  */
+    H5G_node_remove,            /*remove        */
+    H5G_node_decode_key,        /*decode        */
+    H5G_node_encode_key,        /*encode        */
+    H5G_node_debug_key          /*debug         */
 }};
 
 /* Declare a free list to manage the H5G_node_t struct */
@@ -140,17 +134,16 @@ H5FL_SEQ_DEFINE(H5G_entry_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_get_shared
+ * Function:    H5G_node_get_shared
  *
- * Purpose:	Returns the shared B-tree info for the specified UDATA.
+ * Purpose:     Returns the shared B-tree info for the specified UDATA.
  *
- * Return:	Success:	Pointer to the raw B-tree page for this
-                                file's groups
+ * Return:      Success:    Pointer to the raw B-tree page for this file's groups
  *
- *		Failure:	Can't fail
+ *              Failure:	Can't fail
  *
- * Programmer:	Robb Matzke
- *		Wednesday, October  8, 1997
+ * Programmer:  Robb Matzke
+ *              Wednesday, October  8, 1997
  *
  * Modifications:
  *
@@ -169,22 +162,22 @@ H5G_node_get_shared(const H5F_t *f, const void H5_ATTR_UNUSED *_udata)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_decode_key
+ * Function:    H5G_node_decode_key
  *
- * Purpose:	Decodes a raw key into a native key.
+ * Purpose:     Decodes a raw key into a native key.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jul  8 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jul  8 1997
  *
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5G_node_decode_key(const H5B_shared_t *shared, const uint8_t *raw, void *_key)
 {
-    H5G_node_key_t	   *key = (H5G_node_key_t *) _key;
+    H5G_node_key_t  *key = (H5G_node_key_t *) _key;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -201,13 +194,13 @@ H5G_node_decode_key(const H5B_shared_t *shared, const uint8_t *raw, void *_key)
 /*-------------------------------------------------------------------------
  * Function:	H5G_node_encode_key
  *
- * Purpose:	Encodes a native key into a raw key.
+ * Purpose:     Encodes a native key into a raw key.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jul  8 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jul  8 1997
  *
  *-------------------------------------------------------------------------
  */
@@ -229,13 +222,13 @@ H5G_node_encode_key(const H5B_shared_t *shared, uint8_t *raw, const void *_key)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_debug_key
+ * Function:    H5G_node_debug_key
  *
- * Purpose:	Prints a key.
+ * Purpose:     Prints a key.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:  Quincey Koziol
  *              Friday, February 28, 2003
  *
  *-------------------------------------------------------------------------
@@ -244,7 +237,7 @@ static herr_t
 H5G_node_debug_key(FILE *stream, int indent, int fwidth, const void *_key,
     const void *_udata)
 {
-    const H5G_node_key_t   *key = (const H5G_node_key_t *) _key;
+    const H5G_node_key_t    *key = (const H5G_node_key_t *) _key;
     const H5G_bt_common_t   *udata = (const H5G_bt_common_t *) _udata;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
@@ -252,15 +245,15 @@ H5G_node_debug_key(FILE *stream, int indent, int fwidth, const void *_key,
     HDassert(key);
 
     HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth, "Heap offset:",
-        (unsigned)key->offset);
+              (unsigned)key->offset);
 
     if(udata->heap) {
         const char *s;
 
         HDfprintf(stream, "%*s%-*s ", indent, "", fwidth, "Name:");
 
-        s = (const char *)H5HL_offset_into(udata->heap, key->offset);
-        HDfprintf(stream, "%s\n", s);
+        if((s = (const char *)H5HL_offset_into(udata->heap, key->offset)) != NULL)
+            HDfprintf(stream, "%s\n", s);
     } /* end if */
     else
         HDfprintf(stream, "%*s%-*s ", indent, "", fwidth, "Cannot get name; heap address not specified\n");
@@ -272,13 +265,13 @@ H5G_node_debug_key(FILE *stream, int indent, int fwidth, const void *_key,
 /*-------------------------------------------------------------------------
  * Function:	H5G__node_free
  *
- * Purpose:	Destroy a symbol table node in memory.
+ * Purpose:     Destroy a symbol table node in memory.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jan 15 2003
+ * Programmer:  Quincey Koziol
+ *              koziol@ncsa.uiuc.edu
+ *              Jan 15 2003
  *
  *-------------------------------------------------------------------------
  */
@@ -304,34 +297,34 @@ H5G__node_free(H5G_node_t *sym)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_create
+ * Function:	H5G__node_create
  *
  * Purpose:	Creates a new empty symbol table node.	This function is
- *		called by the B-tree insert function for an empty tree.	 It
- *		is also called internally to split a symbol node with LT_KEY
- *		and RT_KEY null pointers.
+ *          called by the B-tree insert function for an empty tree.	 It
+ *          is also called internally to split a symbol node with LT_KEY
+ *          and RT_KEY null pointers.
  *
- * Return:	Success:	Non-negative.  The address of symbol table
- *				node is returned through the ADDR_P argument.
+ * Return:  Success:    Non-negative.   The address of symbol table
+ *                      node is returned through the ADDR_P argument.
  *
- *		Failure:	Negative
+ *          Failure:    Negative
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 23 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jun 23 1997
  *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_node_create(H5F_t *f, hid_t dxpl_id, H5B_ins_t H5_ATTR_UNUSED op, void *_lt_key,
-		void H5_ATTR_UNUSED *_udata, void *_rt_key, haddr_t *addr_p/*out*/)
+H5G__node_create(H5F_t *f, H5B_ins_t H5_ATTR_UNUSED op, void *_lt_key,
+    void H5_ATTR_UNUSED *_udata, void *_rt_key, haddr_t *addr_p/*out*/)
 {
-    H5G_node_key_t	*lt_key = (H5G_node_key_t *)_lt_key;
-    H5G_node_key_t	*rt_key = (H5G_node_key_t *)_rt_key;
-    H5G_node_t		*sym = NULL;
-    herr_t              ret_value = SUCCEED;       /* Return value */
+    H5G_node_key_t  *lt_key = (H5G_node_key_t *)_lt_key;
+    H5G_node_key_t  *rt_key = (H5G_node_key_t *)_rt_key;
+    H5G_node_t      *sym = NULL;
+    herr_t          ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -340,15 +333,15 @@ H5G_node_create(H5F_t *f, hid_t dxpl_id, H5B_ins_t H5_ATTR_UNUSED op, void *_lt_
     HDassert(H5B_INS_FIRST == op);
 
     if(NULL == (sym = H5FL_CALLOC(H5G_node_t)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
     sym->node_size = H5G_NODE_SIZE(f);
-    if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_BTREE, dxpl_id, (hsize_t)sym->node_size)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to allocate file space")
+    if(HADDR_UNDEF == (*addr_p = H5MF_alloc(f, H5FD_MEM_BTREE, (hsize_t)sym->node_size)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to allocate file space")
     if(NULL == (sym->entry = H5FL_SEQ_CALLOC(H5G_entry_t, (size_t)(2 * H5F_SYM_LEAF_K(f)))))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTALLOC, FAIL, "memory allocation failed")
+        HGOTO_ERROR(H5E_SYM, H5E_CANTALLOC, FAIL, "memory allocation failed")
 
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_SNODE, *addr_p, sym, H5AC__NO_FLAGS_SET) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to cache symbol table leaf node")
+    if(H5AC_insert_entry(f, H5AC_SNODE, *addr_p, sym, H5AC__NO_FLAGS_SET) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to cache symbol table leaf node")
     /*
      * The left and right symbols in an empty tree are both the
      * empty string stored at offset zero by the H5G functions. This
@@ -370,60 +363,58 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_node_create() */
+} /* end H5G__node_create() */
 
 
 /*-------------------------------------------------------------------------
  * Function:	H5G_node_cmp2
  *
  * Purpose:	Compares two keys from a B-tree node (LT_KEY and RT_KEY).
- *		The UDATA pointer supplies extra data not contained in the
- *		keys (in this case, the heap address).
+ *          The UDATA pointer supplies extra data not contained in the
+ *          keys (in this case, the heap address).
  *
- * Return:	Success:	negative if LT_KEY is less than RT_KEY.
+ * Return:  Success:    negative if LT_KEY is less than RT_KEY.
  *
- *				positive if LT_KEY is greater than RT_KEY.
+ *                      positive if LT_KEY is greater than RT_KEY.
  *
- *				zero if LT_KEY and RT_KEY are equal.
+ *                      zero if LT_KEY and RT_KEY are equal.
  *
- *		Failure:	FAIL (same as LT_KEY<RT_KEY)
+ *          Failure:    FAIL (same as LT_KEY<RT_KEY)
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 23 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jun 23 1997
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
-static int
+static herr_t
 H5G_node_cmp2(void *_lt_key, void *_udata, void *_rt_key)
 {
-    H5G_bt_common_t	   *udata = (H5G_bt_common_t *) _udata;
-    H5G_node_key_t	   *lt_key = (H5G_node_key_t *) _lt_key;
-    H5G_node_key_t	   *rt_key = (H5G_node_key_t *) _rt_key;
-    const char		   *s1, *s2;
-    const char		   *base;           /* Base of heap */
-    int		           ret_value = -1;  /* Return value */
+    H5G_bt_common_t     *udata = (H5G_bt_common_t *) _udata;
+    H5G_node_key_t      *lt_key = (H5G_node_key_t *) _lt_key;
+    H5G_node_key_t      *rt_key = (H5G_node_key_t *) _rt_key;
+    const char          *s1, *s2;
+    int                 ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_NOAPI_NOINIT
 
     /* Sanity checks */
     HDassert(udata && udata->heap);
     HDassert(lt_key);
     HDassert(rt_key);
 
-    /* Get base address of heap */
-    base = (const char *)H5HL_offset_into(udata->heap, (size_t)0);
-    HDassert(base);
-
     /* Get pointers to string names */
-    s1 = base + lt_key->offset;
-    s2 = base + rt_key->offset;
+    if((s1 = (const char *)H5HL_offset_into(udata->heap, lt_key->offset)) == NULL)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get key name")
+    if((s2 = (const char *)H5HL_offset_into(udata->heap, rt_key->offset)) == NULL)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get key name")
 
     /* Set return value */
     ret_value = HDstrcmp(s1, s2);
 
+done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* H5G_node_cmp2() */
 
@@ -432,102 +423,99 @@ H5G_node_cmp2(void *_lt_key, void *_udata, void *_rt_key)
  * Function:	H5G_node_cmp3
  *
  * Purpose:	Compares two keys from a B-tree node (LT_KEY and RT_KEY)
- *		against another key (not necessarily the same type)
- *		pointed to by UDATA.
+ *          against another key (not necessarily the same type)
+ *          pointed to by UDATA.
  *
- * Return:	Success:	negative if the UDATA key is less than
- *				or equal to the LT_KEY
+ * Return:  Success:    negative if the UDATA key is less than
+ *                      or equal to the LT_KEY
  *
- *				positive if the UDATA key is greater
- *				than the RT_KEY.
+ *                      positive if the UDATA key is greater
+ *                      than the RT_KEY.
  *
- *				zero if the UDATA key falls between
- *				the LT_KEY (exclusive) and the
- *				RT_KEY (inclusive).
+ *                      zero if the UDATA key falls between
+ *                      the LT_KEY (exclusive) and the
+ *                      RT_KEY (inclusive).
  *
- *		Failure:	FAIL (same as UDATA < LT_KEY)
+ *          Failure:    FAIL (same as UDATA < LT_KEY)
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 23 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jun 23 1997
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
-static int
+static herr_t
 H5G_node_cmp3(void *_lt_key, void *_udata, void *_rt_key)
 {
-    H5G_bt_common_t	*udata = (H5G_bt_common_t *) _udata;
-    H5G_node_key_t	*lt_key = (H5G_node_key_t *) _lt_key;
-    H5G_node_key_t	*rt_key = (H5G_node_key_t *) _rt_key;
-    const char		*s;
-    const char          *base;              /* Base of heap */
-    int                  ret_value = 0;       /* Return value */
+    H5G_bt_common_t *udata = (H5G_bt_common_t *) _udata;
+    H5G_node_key_t  *lt_key = (H5G_node_key_t *) _lt_key;
+    H5G_node_key_t  *rt_key = (H5G_node_key_t *) _rt_key;
+    const char      *s;
+    herr_t          ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_NOAPI_NOINIT
 
     /* Sanity checks */
     HDassert(udata && udata->heap);
     HDassert(lt_key);
     HDassert(rt_key);
 
-    /* Get base address of heap */
-    base = (const char *)H5HL_offset_into(udata->heap, (size_t)0);
-    HDassert(base);
-
     /* left side */
-    s = base + lt_key->offset;
+    if((s = (const char *)H5HL_offset_into(udata->heap, lt_key->offset)) == NULL)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get key name")
     if(HDstrcmp(udata->name, s) <= 0)
-	ret_value = (-1);
+        ret_value = (-1);
     else {
         /* right side */
-        s = base + rt_key->offset;
+        if((s = (const char *)H5HL_offset_into(udata->heap, rt_key->offset)) == NULL)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get key name")
         if(HDstrcmp(udata->name, s) > 0)
             ret_value = 1;
     } /* end else */
 
+done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5G_node_cmp3() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_found
+ * Function:    H5G_node_found
  *
- * Purpose:	The B-tree search engine has found the symbol table node
- *		which contains the requested symbol if the symbol exists.
- *		This function should examine that node for the symbol and
- *		return information about the symbol through the UDATA
- *		structure which contains the symbol name on function
- *		entry.
+ * Purpose:     The B-tree search engine has found the symbol table node
+ *              which contains the requested symbol if the symbol exists.
+ *              This function should examine that node for the symbol and
+ *              return information about the symbol through the UDATA
+ *              structure which contains the symbol name on function
+ *              entry.
  *
- *		If the operation flag in UDATA is H5G_OPER_FIND, then
- *		the entry is copied from the symbol table to the UDATA
- *		entry field.  Otherwise the entry is copied from the
- *		UDATA entry field to the symbol table.
+ *              If the operation flag in UDATA is H5G_OPER_FIND, then
+ *              the entry is copied from the symbol table to the UDATA
+ *              entry field.  Otherwise the entry is copied from the
+ *              UDATA entry field to the symbol table.
  *
- * Return:	Success:	Non-negative (TRUE/FALSE) if found and data
- *                              returned through the UDATA pointer.
+ * Return:      Success:    Non-negative (TRUE/FALSE) if found and data
+ *                          returned through the UDATA pointer.
  *
- *		Failure:	Negative if not found.
+ *              Failure:    Negative if not found.
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 23 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jun 23 1997
  *
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5G_node_found(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void H5_ATTR_UNUSED *_lt_key,
+H5G_node_found(H5F_t *f, haddr_t addr, const void H5_ATTR_UNUSED *_lt_key,
     void *_udata)
 {
-    H5G_bt_lkp_t	*udata = (H5G_bt_lkp_t *)_udata;
-    H5G_node_t		*sn = NULL;
-    unsigned		lt = 0, idx = 0, rt;
-    int		        cmp = 1;
-    const char		*s;
-    const char          *base;                  /* Base of heap */
-    htri_t              ret_value = TRUE;       /* Return value */
+    H5G_bt_lkp_t    *udata = (H5G_bt_lkp_t *)_udata;
+    H5G_node_t      *sn = NULL;
+    unsigned        lt = 0, idx = 0, rt;
+    int             cmp = 1;
+    const char      *s;
+    htri_t          ret_value = TRUE;   /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
@@ -541,26 +529,24 @@ H5G_node_found(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void H5_ATTR_UNUSED
     /*
      * Load the symbol table node for exclusive access.
      */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to protect symbol table node")
-
-    /* Get base address of heap */
-    base = (const char *)H5HL_offset_into(udata->common.heap, (size_t)0);
-    HDassert(base);
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to protect symbol table node")
 
     /*
      * Binary search.
      */
     rt = sn->nsyms;
     while(lt < rt && cmp) {
-	idx = (lt + rt) / 2;
-        s = base + sn->entry[idx].name_off;
-	cmp = HDstrcmp(udata->common.name, s);
-
-	if (cmp < 0)
-	    rt = idx;
-	else
-	    lt = idx + 1;
+        idx = (lt + rt) / 2;
+        
+        if((s = (const char *)H5HL_offset_into(udata->common.heap, sn->entry[idx].name_off)) == NULL)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get symbol table name")
+        cmp = HDstrcmp(udata->common.name, s);
+
+        if (cmp < 0)
+            rt = idx;
+        else
+            lt = idx + 1;
     } /* end while */
 
     if(cmp)
@@ -571,68 +557,63 @@ H5G_node_found(H5F_t *f, hid_t dxpl_id, haddr_t addr, const void H5_ATTR_UNUSED
         HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "iterator callback failed")
 
 done:
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to release symbol table node")
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to release symbol table node")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5G_node_found() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_insert
+ * Function:    H5G__node_insert
  *
- * Purpose:	The B-tree insertion engine has found the symbol table node
- *		which should receive the new symbol/address pair.  This
- *		function adds it to that node unless it already existed.
+ * Purpose:     The B-tree insertion engine has found the symbol table node
+ *              which should receive the new symbol/address pair.  This
+ *              function adds it to that node unless it already existed.
  *
- *		If the node has no room for the symbol then the node is
- *		split into two nodes.  The original node contains the
- *		low values and the new node contains the high values.
- *		The new symbol table entry is added to either node as
- *		appropriate.  When a split occurs, this function will
- *		write the maximum key of the low node to the MID buffer
- *		and return the address of the new node.
+ *              If the node has no room for the symbol then the node is
+ *              split into two nodes.  The original node contains the
+ *              low values and the new node contains the high values.
+ *              The new symbol table entry is added to either node as
+ *              appropriate.  When a split occurs, this function will
+ *              write the maximum key of the low node to the MID buffer
+ *              and return the address of the new node.
  *
- *		If the new key is larger than RIGHT then update RIGHT
- *		with the new key.
+ *              If the new key is larger than RIGHT then update RIGHT
+ *              with the new key.
  *
- * Return:	Success:	An insertion command for the caller, one of
- *				the H5B_INS_* constants.  The address of the
- *				new node, if any, is returned through the
- *				NEW_NODE_P argument.  NEW_NODE_P might not be
- *				initialized if the return value is
- *				H5B_INS_NOOP.
+ * Return:      Success:    An insertion command for the caller, one of
+ *                          the H5B_INS_* constants.  The address of the
+ *                          new node, if any, is returned through the
+ *                          NEW_NODE_P argument.  NEW_NODE_P might not be
+ *                          initialized if the return value is H5B_INS_NOOP.
  *
- *		Failure:	H5B_INS_ERROR, NEW_NODE_P might not be
- *				initialized.
+ *              Failure:    H5B_INS_ERROR, NEW_NODE_P might not be initialized.
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 24 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jun 24 1997
  *
  *-------------------------------------------------------------------------
  */
 static H5B_ins_t
-H5G_node_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    void H5_ATTR_UNUSED *_lt_key, hbool_t H5_ATTR_UNUSED *lt_key_changed,
-    void *_md_key, void *_udata,
-    void *_rt_key, hbool_t *rt_key_changed,
-    haddr_t *new_node_p)
+H5G__node_insert(H5F_t *f, haddr_t addr, void H5_ATTR_UNUSED *_lt_key,
+    hbool_t H5_ATTR_UNUSED *lt_key_changed, void *_md_key, void *_udata,
+    void *_rt_key, hbool_t *rt_key_changed, haddr_t *new_node_p)
 {
-    H5G_node_key_t	*md_key = (H5G_node_key_t *) _md_key;
-    H5G_node_key_t	*rt_key = (H5G_node_key_t *) _rt_key;
-    H5G_bt_ins_t	*udata = (H5G_bt_ins_t *) _udata;
-    H5G_node_t		*sn = NULL, *snrt = NULL;
-    unsigned		sn_flags = H5AC__NO_FLAGS_SET, snrt_flags = H5AC__NO_FLAGS_SET;
-    const char		*s;
-    const char          *base;                  /* Base of heap */
-    unsigned		lt = 0, rt;		/* Binary search cntrs	*/
-    int		        cmp = 1, idx = -1;
-    H5G_node_t		*insert_into = NULL;	/*node that gets new entry*/
-    H5G_entry_t         ent;                    /* Entry to insert in node */
-    H5B_ins_t		ret_value = H5B_INS_ERROR;
-
-    FUNC_ENTER_NOAPI_NOINIT
+    H5G_node_key_t  *md_key = (H5G_node_key_t *) _md_key;
+    H5G_node_key_t  *rt_key = (H5G_node_key_t *) _rt_key;
+    H5G_bt_ins_t    *udata = (H5G_bt_ins_t *) _udata;
+    H5G_node_t      *sn = NULL, *snrt = NULL;
+    unsigned        sn_flags = H5AC__NO_FLAGS_SET, snrt_flags = H5AC__NO_FLAGS_SET;
+    const char      *s;
+    unsigned        lt = 0, rt;             /* Binary search cntrs	*/
+    int             cmp = 1, idx = -1;
+    H5G_node_t      *insert_into = NULL;    /*node that gets new entry*/
+    H5G_entry_t     ent;                    /* Entry to insert in node */
+    H5B_ins_t       ret_value = H5B_INS_ERROR;
+
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -647,97 +628,94 @@ H5G_node_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr,
     /*
      * Load the symbol node.
      */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__NO_FLAGS_SET)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to protect symbol table node")
-
-    /* Get base address of heap */
-    base = (const char *)H5HL_offset_into(udata->common.heap, (size_t)0);
-    HDassert(base);
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__NO_FLAGS_SET)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to protect symbol table node")
 
     /*
      * Where does the new symbol get inserted?	We use a binary search.
      */
     rt = sn->nsyms;
     while(lt < rt) {
-	idx = (int)((lt + rt) / 2);
-        s = base + sn->entry[idx].name_off;
+        idx = (int)((lt + rt) / 2);
+        if((s = (const char *)H5HL_offset_into(udata->common.heap, sn->entry[idx].name_off)) == NULL)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5B_INS_ERROR, "unable to get symbol table name")
 
         /* Check if symbol is already present */
-	if(0 == (cmp = HDstrcmp(udata->common.name, s)))
+        if(0 == (cmp = HDstrcmp(udata->common.name, s)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, H5B_INS_ERROR, "symbol is already present in symbol table")
 
-	if (cmp < 0)
-	    rt = (unsigned)idx;
-	else
-	    lt = (unsigned)(idx + 1);
+        if (cmp < 0)
+            rt = (unsigned)idx;
+        else
+            lt = (unsigned)(idx + 1);
     } /* end while */
     idx += cmp > 0 ? 1 : 0;
 
     /* Convert link information & name to symbol table entry */
-    if(H5G__ent_convert(f, dxpl_id, udata->common.heap, udata->common.name,
+    if(H5G__ent_convert(f, udata->common.heap, udata->common.name,
             udata->lnk, udata->obj_type, udata->crt_info, &ent) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTCONVERT, H5B_INS_ERROR, "unable to convert link")
+        HGOTO_ERROR(H5E_SYM, H5E_CANTCONVERT, H5B_INS_ERROR, "unable to convert link")
 
     /* Determine where to place entry in node */
     if(sn->nsyms >= 2 * H5F_SYM_LEAF_K(f)) {
-	/*
-	 * The node is full.  Split it into a left and right
-	 * node and return the address of the new right node (the
-	 * left node is at the same address as the original node).
-	 */
-	ret_value = H5B_INS_RIGHT;
-
-	/* The right node */
-	if(H5G_node_create(f, dxpl_id, H5B_INS_FIRST, NULL, NULL, NULL, new_node_p/*out*/) < 0)
-	    HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5B_INS_ERROR, "unable to split symbol table node")
-
-	if(NULL == (snrt = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, *new_node_p, f, H5AC__NO_FLAGS_SET)))
-	    HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to split symbol table node")
-
-	HDmemcpy(snrt->entry, sn->entry + H5F_SYM_LEAF_K(f),
-		 H5F_SYM_LEAF_K(f) * sizeof(H5G_entry_t));
-	snrt->nsyms = H5F_SYM_LEAF_K(f);
+        /*
+         * The node is full.  Split it into a left and right
+         * node and return the address of the new right node (the
+         * left node is at the same address as the original node).
+         */
+         ret_value = H5B_INS_RIGHT;
+
+         /* The right node */
+         if(H5G__node_create(f, H5B_INS_FIRST, NULL, NULL, NULL, new_node_p/*out*/) < 0)
+            HGOTO_ERROR (H5E_SYM, H5E_CANTINIT, H5B_INS_ERROR, "unable to split symbol table node")
+
+        if(NULL == (snrt = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, *new_node_p, f, H5AC__NO_FLAGS_SET)))
+            HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to split symbol table node")
+
+        HDmemcpy(snrt->entry, sn->entry + H5F_SYM_LEAF_K(f),
+            H5F_SYM_LEAF_K(f) * sizeof(H5G_entry_t));
+        snrt->nsyms = H5F_SYM_LEAF_K(f);
         snrt_flags |= H5AC__DIRTIED_FLAG;
 
-	/* The left node */
-	HDmemset(sn->entry + H5F_SYM_LEAF_K(f), 0,
-		 H5F_SYM_LEAF_K(f) * sizeof(H5G_entry_t));
-	sn->nsyms = H5F_SYM_LEAF_K(f);
+        /* The left node */
+        HDmemset(sn->entry + H5F_SYM_LEAF_K(f), 0,
+            H5F_SYM_LEAF_K(f) * sizeof(H5G_entry_t));
+        sn->nsyms = H5F_SYM_LEAF_K(f);
         sn_flags |= H5AC__DIRTIED_FLAG;
 
-	/* The middle key */
-	md_key->offset = sn->entry[sn->nsyms - 1].name_off;
+        /* The middle key */
+        md_key->offset = sn->entry[sn->nsyms - 1].name_off;
 
-	/* Where to insert the new entry? */
-	if(idx <= (int)H5F_SYM_LEAF_K(f)) {
-	    insert_into = sn;
-	    if(idx == (int)H5F_SYM_LEAF_K(f))
-		md_key->offset = ent.name_off;
-	} /* end if */
+        /* Where to insert the new entry? */
+        if(idx <= (int)H5F_SYM_LEAF_K(f)) {
+            insert_into = sn;
+            if(idx == (int)H5F_SYM_LEAF_K(f))
+                md_key->offset = ent.name_off;
+        } /* end if */
         else {
-	    idx -= (int)H5F_SYM_LEAF_K(f);
-	    insert_into = snrt;
-	    if(idx == (int)H5F_SYM_LEAF_K(f)) {
-		rt_key->offset = ent.name_off;
-		*rt_key_changed = TRUE;
-	    } /* end if */
-	} /* end else */
+            idx -= (int)H5F_SYM_LEAF_K(f);
+            insert_into = snrt;
+            if(idx == (int)H5F_SYM_LEAF_K(f)) {
+                rt_key->offset = ent.name_off;
+                *rt_key_changed = TRUE;
+            } /* end if */
+        } /* end else */
     } /* end if */
     else {
-	/* Where to insert the new entry? */
-	ret_value = H5B_INS_NOOP;
+        /* Where to insert the new entry? */
+        ret_value = H5B_INS_NOOP;
         sn_flags |= H5AC__DIRTIED_FLAG;
-	insert_into = sn;
-	if(idx == (int)sn->nsyms) {
-	    rt_key->offset = ent.name_off;
-	    *rt_key_changed = TRUE;
-	} /* end if */
+        insert_into = sn;
+        if(idx == (int)sn->nsyms) {
+            rt_key->offset = ent.name_off;
+            *rt_key_changed = TRUE;
+        } /* end if */
     } /* end else */
 
     /* Move entries down to make room for new entry */
     HDassert(idx >= 0);
     HDmemmove(insert_into->entry + idx + 1, insert_into->entry + idx,
-	      (insert_into->nsyms - (unsigned)idx) * sizeof(H5G_entry_t));
+        (insert_into->nsyms - (unsigned)idx) * sizeof(H5G_entry_t));
 
     /* Copy new entry into table */
     H5G__ent_copy(&(insert_into->entry[idx]), &ent, H5_COPY_SHALLOW);
@@ -746,57 +724,57 @@ H5G_node_insert(H5F_t *f, hid_t dxpl_id, haddr_t addr,
     insert_into->nsyms += 1;
 
 done:
-    if(snrt && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, *new_node_p, snrt, snrt_flags) < 0)
-	HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to release symbol table node")
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, sn_flags) < 0)
-	HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to release symbol table node")
+    if(snrt && H5AC_unprotect(f, H5AC_SNODE, *new_node_p, snrt, snrt_flags) < 0)
+        HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to release symbol table node")
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, sn_flags) < 0)
+        HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5B_INS_ERROR, "unable to release symbol table node")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_node_insert() */
+} /* end H5G__node_insert() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_remove
+ * Function:    H5G_node_remove
  *
- * Purpose:	The B-tree removal engine has found the symbol table node
- *		which should contain the name which is being removed.  This
- *		function removes the name from the symbol table and
- *		decrements the link count on the object to which the name
- *		points.
+ * Purpose: The B-tree removal engine has found the symbol table node
+ *          which should contain the name which is being removed.  This
+ *          function removes the name from the symbol table and
+ *          decrements the link count on the object to which the name
+ *          points.
  *
- *              If the udata->name parameter is set to NULL, then remove
- *              all entries in this symbol table node.  This only occurs
- *              during the deletion of the entire group, so don't bother
- *              freeing individual name entries in the local heap, the group's
- *              symbol table removal code will just free the entire local
- *              heap eventually.  Do reduce the link counts for each object
- *              however.
+ *          If the udata->name parameter is set to NULL, then remove
+ *          all entries in this symbol table node.  This only occurs
+ *          during the deletion of the entire group, so don't bother
+ *          freeing individual name entries in the local heap, the group's
+ *          symbol table removal code will just free the entire local
+ *          heap eventually.  Do reduce the link counts for each object
+ *          however.
  *
- * Return:	Success:	If all names are removed from the symbol
- *				table node then H5B_INS_REMOVE is returned;
- *				otherwise H5B_INS_NOOP is returned.
+ * Return:  Success:    If all names are removed from the symbol
+ *                      table node then H5B_INS_REMOVE is returned;
+ *                      otherwise H5B_INS_NOOP is returned.
  *
- *		Failure:	H5B_INS_ERROR
+ *          Failure:    H5B_INS_ERROR
  *
- * Programmer:	Robb Matzke
+ * Programmer:  Robb Matzke
  *              Thursday, September 24, 1998
  *
  *-------------------------------------------------------------------------
  */
 static H5B_ins_t
-H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
-		hbool_t H5_ATTR_UNUSED *lt_key_changed/*out*/,
-		void *_udata/*in,out*/, void *_rt_key/*in,out*/,
-		hbool_t *rt_key_changed/*out*/)
+H5G_node_remove(H5F_t *f, haddr_t addr, void *_lt_key/*in,out*/,
+    hbool_t H5_ATTR_UNUSED *lt_key_changed/*out*/,
+    void *_udata/*in,out*/, void *_rt_key/*in,out*/,
+    hbool_t *rt_key_changed/*out*/)
 {
-    H5G_node_key_t	*lt_key = (H5G_node_key_t *)_lt_key;
-    H5G_node_key_t	*rt_key = (H5G_node_key_t *)_rt_key;
-    H5G_bt_rm_t	*udata = (H5G_bt_rm_t *)_udata;
-    H5G_node_t		*sn = NULL;
-    unsigned		sn_flags = H5AC__NO_FLAGS_SET;
-    unsigned		lt = 0, rt, idx = 0;
-    int		        cmp = 1;
-    H5B_ins_t		ret_value = H5B_INS_ERROR;
+    H5G_node_key_t  *lt_key = (H5G_node_key_t *)_lt_key;
+    H5G_node_key_t  *rt_key = (H5G_node_key_t *)_rt_key;
+    H5G_bt_rm_t     *udata = (H5G_bt_rm_t *)_udata;
+    H5G_node_t      *sn = NULL;
+    unsigned        sn_flags = H5AC__NO_FLAGS_SET;
+    unsigned        lt = 0, rt, idx = 0;
+    int             cmp = 1;
+    H5B_ins_t       ret_value = H5B_INS_ERROR;
 
     FUNC_ENTER_NOAPI_NOINIT
 
@@ -808,17 +786,13 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
     HDassert(udata && udata->common.heap);
 
     /* Load the symbol table */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__NO_FLAGS_SET)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to protect symbol table node")
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__NO_FLAGS_SET)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to protect symbol table node")
 
     /* "Normal" removal of a single entry from the symbol table node */
     if(udata->common.name != NULL) {
         H5O_link_t lnk;         /* Constructed link for replacement */
         size_t link_name_len;   /* Length of string in local heap */
-        const char *base;       /* Base of heap */
-
-        /* Get base address of heap */
-        base = (const char *)H5HL_offset_into(udata->common.heap, (size_t)0);
 
         /* Find the name with a binary search */
         rt = sn->nsyms;
@@ -826,7 +800,8 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
             const char *s;          /* Pointer to string in local heap */
 
             idx = (lt + rt) / 2;
-            s = base + sn->entry[idx].name_off;
+            if((s = (const char *)H5HL_offset_into(udata->common.heap, sn->entry[idx].name_off)) == NULL)
+                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5B_INS_ERROR, "unable to get symbol table name")
             cmp = HDstrcmp(udata->common.name, s);
             if(cmp < 0)
                 rt = idx;
@@ -848,7 +823,8 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
         lnk.cset = H5T_CSET_ASCII;
         if(sn->entry[idx].type == H5G_CACHED_SLINK) {
             lnk.type = H5L_TYPE_SOFT;
-            lnk.u.soft.name = (char *)H5HL_offset_into(udata->common.heap, sn->entry[idx].cache.slink.lval_offset);
+            if(NULL == (lnk.u.soft.name = (char *)H5HL_offset_into(udata->common.heap, sn->entry[idx].cache.slink.lval_offset)))
+                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5B_INS_ERROR, "unable to get link name")
         } /* end if */
         else {
             lnk.type = H5L_TYPE_HARD;
@@ -857,7 +833,7 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
         } /* end else */
 
         /* Replace any object names */
-        if(H5G__link_name_replace(f, dxpl_id, udata->grp_full_path_r, &lnk) < 0)
+        if(H5G__link_name_replace(f, udata->grp_full_path_r, &lnk) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5B_INS_ERROR, "unable to get object type")
 
         /* Decrement the ref. count for hard links */
@@ -868,7 +844,7 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
             tmp_oloc.file = f;
             tmp_oloc.addr = lnk.u.hard.addr;
 
-            if(H5O_link(&tmp_oloc, -1, dxpl_id) < 0)
+            if(H5O_link(&tmp_oloc, -1) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, H5B_INS_ERROR, "unable to decrement object link count")
         } /* end if */
         else {
@@ -877,13 +853,13 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
                 size_t soft_link_len;   /* Length of string in local heap */
 
                 soft_link_len = HDstrlen(lnk.u.soft.name) + 1;
-                if(H5HL_remove(f, dxpl_id, udata->common.heap, sn->entry[idx].cache.slink.lval_offset, soft_link_len) < 0)
+                if(H5HL_remove(f, udata->common.heap, sn->entry[idx].cache.slink.lval_offset, soft_link_len) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, H5B_INS_ERROR, "unable to remove soft link from local heap")
             } /* end if */
         } /* end else */
 
         /* Remove the link's name from the local heap */
-        if(H5HL_remove(f, dxpl_id, udata->common.heap, sn->entry[idx].name_off, link_name_len) < 0)
+        if(H5HL_remove(f, udata->common.heap, sn->entry[idx].name_off, link_name_len) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, H5B_INS_ERROR, "unable to remove link name from local heap")
 
         /* Remove the entry from the symbol table node */
@@ -945,7 +921,7 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
                 HDassert(H5F_addr_defined(sn->entry[idx].header));
                 tmp_oloc.addr = sn->entry[idx].header;
 
-                if(H5O_link(&tmp_oloc, -1, dxpl_id) < 0)
+                if(H5O_link(&tmp_oloc, -1) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, H5B_INS_ERROR, "unable to decrement object link count")
             } /* end if */
         } /* end for */
@@ -961,35 +937,35 @@ H5G_node_remove(H5F_t *f, hid_t dxpl_id, haddr_t addr, void *_lt_key/*in,out*/,
     } /* end else */
 
 done:
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, sn_flags) < 0)
-	HDONE_ERROR(H5E_SYM, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release symbol table node")
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, sn_flags) < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTUNPROTECT, H5B_INS_ERROR, "unable to release symbol table node")
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5G_node_remove() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G__node_iterate
+ * Function:    H5G__node_iterate
  *
- * Purpose:	This function gets called during a group iterate operation.
+ * Purpose:     This function gets called during a group iterate operation.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 24 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Jun 24 1997
  *
  *-------------------------------------------------------------------------
  */
 int
-H5G__node_iterate(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
+H5G__node_iterate(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
     const void H5_ATTR_UNUSED *_rt_key, void *_udata)
 {
-    H5G_bt_it_it_t	*udata = (H5G_bt_it_it_t *)_udata;
-    H5G_node_t		*sn = NULL;
-    H5G_entry_t		*ents;                  /* Pointer to entries in this node */
-    unsigned		u;                      /* Local index variable */
-    int	                ret_value = H5_ITER_CONT;
+    H5G_bt_it_it_t  *udata = (H5G_bt_it_it_t *)_udata;
+    H5G_node_t      *sn = NULL;
+    H5G_entry_t     *ents;              /* Pointer to entries in this node */
+    unsigned        u;                  /* Local index variable */
+    int             ret_value = H5_ITER_CONT;
 
     FUNC_ENTER_PACKAGE
 
@@ -1001,8 +977,8 @@ H5G__node_iterate(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, h
     HDassert(udata && udata->heap);
 
     /* Protect the symbol table node & local heap while we iterate over entries */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
 
     /*
      * Iterate over the symbol table node entries.
@@ -1015,8 +991,8 @@ H5G__node_iterate(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, h
             const char *name;   /* Pointer to link name in heap */
 
             /* Get the pointer to the name of the link in the heap */
-            name = (const char *)H5HL_offset_into(udata->heap, ents[u].name_off);
-            HDassert(name);
+            if((name = (const char *)H5HL_offset_into(udata->heap, ents[u].name_off)) == NULL)
+                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5_ITER_ERROR, "unable to get symbol table node name")
 
             /* Convert the entry to a link */
             if(H5G__ent_to_link(&lnk, udata->heap, &ents[u], name) < 0)
@@ -1040,7 +1016,7 @@ H5G__node_iterate(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, h
 
 done:
     /* Release resources */
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1048,12 +1024,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G__node_sumup
+ * Function:    H5G__node_sumup
  *
- * Purpose:	This function gets called during a group iterate operation
+ * Purpose:     This function gets called during a group iterate operation
  *              to return total number of members in the group.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
  * Programmer:  Raymond Lu
  *              Nov 20, 2002
@@ -1061,12 +1037,12 @@ done:
  *-------------------------------------------------------------------------
  */
 int
-H5G__node_sumup(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
-		  const void H5_ATTR_UNUSED *_rt_key, void *_udata)
+H5G__node_sumup(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
+    const void H5_ATTR_UNUSED *_rt_key, void *_udata)
 {
     hsize_t	        *num_objs = (hsize_t *)_udata;
-    H5G_node_t		*sn = NULL;
-    int                  ret_value = H5_ITER_CONT;
+    H5G_node_t      *sn = NULL;
+    int             ret_value = H5_ITER_CONT;
 
     FUNC_ENTER_PACKAGE
 
@@ -1078,13 +1054,13 @@ H5G__node_sumup(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, had
     HDassert(num_objs);
 
     /* Find the object node and add the number of symbol entries. */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
 
     *num_objs += sn->nsyms;
 
 done:
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1092,12 +1068,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G__node_by_idx
+ * Function:    H5G__node_by_idx
  *
- * Purpose:	This function gets called during a group iterate operation
+ * Purpose:     This function gets called during a group iterate operation
  *              to return object name by giving idx.
  *
- * Return:	0 if object isn't found in this node; 1 if object is found;
+ * Return:      0 if object isn't found in this node; 1 if object is found;
  *              Negative on failure
  *
  * Programmer:  Raymond Lu
@@ -1106,12 +1082,12 @@ done:
  *-------------------------------------------------------------------------
  */
 int
-H5G__node_by_idx(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
-		  const void H5_ATTR_UNUSED *_rt_key, void *_udata)
+H5G__node_by_idx(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
+    const void H5_ATTR_UNUSED *_rt_key, void *_udata)
 {
-    H5G_bt_it_idx_common_t	*udata = (H5G_bt_it_idx_common_t *)_udata;
-    H5G_node_t		*sn = NULL;
-    int                 ret_value = H5_ITER_CONT;
+    H5G_bt_it_idx_common_t  *udata = (H5G_bt_it_idx_common_t *)_udata;
+    H5G_node_t              *sn = NULL;
+    int                     ret_value = H5_ITER_CONT;
 
     FUNC_ENTER_PACKAGE
 
@@ -1123,8 +1099,8 @@ H5G__node_by_idx(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, ha
     HDassert(udata);
 
     /* Get a pointer to the symbol table node */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node");
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node");
 
     /* Find the node, locate the object symbol table entry and retrieve the name */
     if(udata->idx >= udata->num_objs && udata->idx < (udata->num_objs + sn->nsyms)) {
@@ -1145,7 +1121,7 @@ H5G__node_by_idx(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, ha
         udata->num_objs += sn->nsyms;
 
 done:
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1153,12 +1129,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G__node_init
+ * Function:    H5G__node_init
  *
- * Purpose:	This function gets called during a file opening to initialize
+ * Purpose:     This function gets called during a file opening to initialize
  *              global information about group B-tree nodes for file.
  *
- * Return:	Non-negative on success
+ * Return:      Non-negative on success
  *              Negative on failure
  *
  * Programmer:  Quincey Koziol
@@ -1169,9 +1145,9 @@ done:
 herr_t
 H5G__node_init(H5F_t *f)
 {
-    H5B_shared_t *shared;               /* Shared B-tree node info */
-    size_t	sizeof_rkey;	        /* Size of raw (disk) key	     */
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    H5B_shared_t    *shared;                /* Shared B-tree node info  */
+    size_t          sizeof_rkey;            /* Size of raw (disk) key   */
+    herr_t          ret_value = SUCCEED;    /* Return value             */
 
     FUNC_ENTER_PACKAGE
 
@@ -1183,14 +1159,14 @@ H5G__node_init(H5F_t *f)
 
     /* Allocate & initialize global info for the shared structure */
     if(NULL == (shared = H5B_shared_new(f, H5B_SNODE, sizeof_rkey)))
-	HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed for shared B-tree info")
+        HGOTO_ERROR(H5E_BTREE, H5E_NOSPACE, FAIL, "memory allocation failed for shared B-tree info")
 
     /* Set up the "local" information for this file's groups */
-        /* <none> */
+    /* <none> */
 
     /* Make shared B-tree info reference counted */
     if(H5F_SET_GRP_BTREE_SHARED(f, H5UC_create(shared, H5B_shared_free)) < 0)
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create ref-count wrapper for shared B-tree info")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "can't create ref-count wrapper for shared B-tree info")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1198,12 +1174,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_close
+ * Function:    H5G_node_close
  *
- * Purpose:	This function gets called during a file close to shutdown
+ * Purpose:     This function gets called during a file close to shutdown
  *              global information about group B-tree nodes for file.
  *
- * Return:	Non-negative on success
+ * Return:      Non-negative on success
  *              Negative on failure
  *
  * Programmer:  Quincey Koziol
@@ -1229,12 +1205,12 @@ H5G_node_close(const H5F_t *f)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G__node_copy
+ * Function:    H5G__node_copy
  *
- * Purpose:	This function gets called during a group iterate operation
+ * Purpose:     This function gets called during a group iterate operation
  *              to copy objects of this node into a new location.
  *
- * Return:	0(zero) on success/Negative on failure
+ * Return:      0(zero) on success/Negative on failure
  *
  * Programmer:  Peter Cao
  *              Sept 10, 2005
@@ -1242,8 +1218,8 @@ H5G_node_close(const H5F_t *f)
  *-------------------------------------------------------------------------
  */
 int
-H5G__node_copy(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
-		  const void H5_ATTR_UNUSED *_rt_key, void *_udata)
+H5G__node_copy(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
+    const void H5_ATTR_UNUSED *_rt_key, void *_udata)
 {
     H5G_bt_it_cpy_t     *udata = (H5G_bt_it_cpy_t *)_udata;
     const H5O_loc_t     *src_oloc = udata->src_oloc;
@@ -1261,11 +1237,11 @@ H5G__node_copy(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, hadd
     HDassert(udata);
 
     /* load the symbol table into memory from the source file */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
 
     /* get the base address of the heap */
-    if(NULL == (heap = H5HL_protect(f, dxpl_id, udata->src_heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(f, udata->src_heap_addr, H5AC__READ_ONLY_FLAG)))
        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5_ITER_ERROR, "unable to protect symbol name")
 
     /* copy object in this node one by one */
@@ -1294,10 +1270,11 @@ H5G__node_copy(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, hadd
             grp_loc.oloc = (H5O_loc_t *)src_oloc;
 
             /* Get pointer to link value in local heap */
-            link_name = (char *)H5HL_offset_into(heap, tmp_src_ent.cache.slink.lval_offset);
+            if((link_name = (char *)H5HL_offset_into(heap, tmp_src_ent.cache.slink.lval_offset)) == NULL)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5_ITER_ERROR, "unable to get link name")
 
             /* Check if the object pointed by the soft link exists in the source file */
-            if(H5G_loc_info(&grp_loc, link_name, FALSE, &oinfo, H5P_DEFAULT, dxpl_id) >= 0) {
+            if(H5G_loc_info(&grp_loc, link_name, FALSE, &oinfo) >= 0) {
                 tmp_src_ent.header = oinfo.addr;
                 src_ent = &tmp_src_ent;
             } /* end if */
@@ -1320,8 +1297,7 @@ H5G__node_copy(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, hadd
             tmp_src_oloc.addr = src_ent->header;
 
             /* Copy the shared object from source to destination */
-            if(H5O_copy_header_map(&tmp_src_oloc, &new_dst_oloc, dxpl_id,
-                    cpy_info, TRUE, &obj_type, (void **)&cpy_udata) < 0)
+            if(H5O_copy_header_map(&tmp_src_oloc, &new_dst_oloc, cpy_info, TRUE, &obj_type, (void **)&cpy_udata) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy object")
 
             /* Set up object creation info for symbol table insertion.  Only
@@ -1344,7 +1320,8 @@ H5G__node_copy(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, hadd
 
             /* Construct link information for eventual insertion */
             lnk.type = H5L_TYPE_SOFT;
-            lnk.u.soft.name = (char *)H5HL_offset_into(heap, src_ent->cache.slink.lval_offset);
+            if((lnk.u.soft.name = (char *)H5HL_offset_into(heap, src_ent->cache.slink.lval_offset)) == NULL)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5_ITER_ERROR, "unable to get link name")
         } /* else if */
         else
             HDassert(0 && "Unknown entry type");
@@ -1356,21 +1333,20 @@ H5G__node_copy(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, hadd
         /* lnk.name = name; */              /* This will be set in callback */
 
         /* Determine name of source object */
-        name = (const char *)H5HL_offset_into(heap, src_ent->name_off);
-	HDassert(name);
+        if((name = (const char *)H5HL_offset_into(heap, src_ent->name_off)) == NULL)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5_ITER_ERROR, "unable to get source object name")
 
         /* Set copied metadata tag */
-        H5_BEGIN_TAG(dxpl_id, H5AC__COPIED_TAG, H5_ITER_ERROR);
+        H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
         /* Insert the new object in the destination file's group */
         /* (Don't increment the link count - that's already done above for hard links) */
         if(H5G__stab_insert_real(udata->dst_file, udata->dst_stab, name, &lnk,
-                obj_type, (obj_type == H5O_TYPE_GROUP ? &gcrt_info : NULL),
-                dxpl_id) < 0)
+                obj_type, (obj_type == H5O_TYPE_GROUP ? &gcrt_info : NULL)) < 0)
             HGOTO_ERROR_TAG(H5E_DATATYPE, H5E_CANTINIT, H5_ITER_ERROR, "unable to insert the name")
 
         /* Reset metadata tag */
-        H5_END_TAG(H5_ITER_ERROR);
+        H5_END_TAG
 
     } /* end of for (i=0; i<sn->nsyms; i++) */
 
@@ -1378,7 +1354,7 @@ done:
     if(heap && H5HL_unprotect(heap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to unprotect symbol name")
 
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1386,26 +1362,26 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G__node_build_table
+ * Function:    H5G__node_build_table
  *
- * Purpose:	B-link tree callback for building table of links
+ * Purpose:     B-link tree callback for building table of links
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Nov 19 2006
+ * Programmer:  Quincey Koziol
+ *              koziol@hdfgroup.org
+ *              Nov 19 2006
  *
  *-------------------------------------------------------------------------
  */
 int
-H5G__node_build_table(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
+H5G__node_build_table(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
     const void H5_ATTR_UNUSED *_rt_key, void *_udata)
 {
-    H5G_bt_it_bt_t	*udata = (H5G_bt_it_bt_t *)_udata;
-    H5G_node_t		*sn = NULL;             /* Symbol table node */
-    unsigned		u;                      /* Local index variable */
-    int	                ret_value = H5_ITER_CONT;
+    H5G_bt_it_bt_t  *udata = (H5G_bt_it_bt_t *)_udata;
+    H5G_node_t      *sn = NULL;             /* Symbol table node */
+    unsigned        u;                      /* Local index variable */
+    int             ret_value = H5_ITER_CONT;
 
     FUNC_ENTER_PACKAGE
 
@@ -1420,8 +1396,8 @@ H5G__node_build_table(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_ke
      * Save information about the symbol table node since we can't lock it
      * because we're about to call an application function.
      */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
-	HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
+        HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
 
     /* Check if the link table needs to be extended */
     if((udata->ltable->nlinks + sn->nsyms) >= udata->alloc_nlinks) {
@@ -1440,8 +1416,8 @@ H5G__node_build_table(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_ke
         size_t          linkno;         /* Link allocated */
 
         /* Get pointer to link's name in the heap */
-        name = (const char *)H5HL_offset_into(udata->heap, sn->entry[u].name_off);
-        HDassert(name);
+        if((name = (const char *)H5HL_offset_into(udata->heap, sn->entry[u].name_off)) == NULL)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5_ITER_ERROR, "unable to get symbol table link name")
 
         /* Determine the link to operate on in the table */
         linkno = udata->ltable->nlinks++;
@@ -1453,7 +1429,7 @@ H5G__node_build_table(H5F_t *f, hid_t dxpl_id, const void H5_ATTR_UNUSED *_lt_ke
 
 done:
     /* Release the locked items */
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1474,8 +1450,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__node_iterate_size(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, const void H5_ATTR_UNUSED *_lt_key, haddr_t H5_ATTR_UNUSED addr,
-    const void H5_ATTR_UNUSED *_rt_key, void *_udata)
+H5G__node_iterate_size(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key, 
+    haddr_t H5_ATTR_UNUSED addr, const void H5_ATTR_UNUSED *_rt_key, void *_udata)
 {
     hsize_t     *stab_size = (hsize_t *)_udata;         /* User data */
 
@@ -1492,27 +1468,27 @@ H5G__node_iterate_size(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, const void H5_ATT
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_node_debug
+ * Function:    H5G_node_debug
  *
- * Purpose:	Prints debugging information about a symbol table node
- *		or a B-tree node for a symbol table B-tree.
+ * Purpose:     Prints debugging information about a symbol table node
+ *              or a B-tree node for a symbol table B-tree.
  *
- * Return:	0(zero) on success/Negative on failure
+ * Return:      0(zero) on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug  4 1997
+ * Programmer:  Robb Matzke
+ *              matzke@llnl.gov
+ *              Aug  4 1997
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G_node_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
-    int fwidth, haddr_t heap_addr)
+H5G_node_debug(H5F_t *f, haddr_t addr, FILE * stream, int indent, int fwidth,
+    haddr_t heap_addr)
 {
-    H5G_node_t		*sn = NULL;
-    H5HL_t              *heap = NULL;
-    unsigned		u;                      /* Local index variable */
-    herr_t              ret_value = SUCCEED;    /* Return value */
+    H5G_node_t *sn = NULL;
+    H5HL_t     *heap = NULL;
+    unsigned    u;                      /* Local index variable */
+    herr_t     ret_value = SUCCEED;     /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -1527,53 +1503,53 @@ H5G_node_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
 
     /* Pin the heap down in memory */
     if(heap_addr > 0 && H5F_addr_defined(heap_addr))
-        if(NULL == (heap = H5HL_protect(f, dxpl_id, heap_addr, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (heap = H5HL_protect(f, heap_addr, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to protect symbol table heap")
 
     /*
      * If we couldn't load the symbol table node, then try loading the
      * B-tree node.
      */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG))) {
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG))) {
         H5G_bt_common_t	udata;		/*data to pass through B-tree	*/
 
         H5E_clear_stack(NULL); /* discard that error */
         udata.heap = heap;
-	if(H5B_debug(f, dxpl_id, addr, stream, indent, fwidth, H5B_SNODE, &udata) < 0)
-	    HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to debug B-tree node");
+        if(H5B_debug(f, addr, stream, indent, fwidth, H5B_SNODE, &udata) < 0)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, FAIL, "unable to debug B-tree node");
     } /* end if */
     else {
-        fprintf(stream, "%*sSymbol Table Node...\n", indent, "");
-        fprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
+        HDfprintf(stream, "%*sSymbol Table Node...\n", indent, "");
+        HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
                 "Dirty:",
                 sn->cache_info.is_dirty ? "Yes" : "No");
-        fprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
+        HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
                 "Size of Node (in bytes):", (unsigned)sn->node_size);
-        fprintf(stream, "%*s%-*s %u of %u\n", indent, "", fwidth,
+        HDfprintf(stream, "%*s%-*s %u of %u\n", indent, "", fwidth,
                 "Number of Symbols:",
                 sn->nsyms, (unsigned)(2 * H5F_SYM_LEAF_K(f)));
 
         indent += 3;
         fwidth = MAX(0, fwidth - 3);
         for(u = 0; u < sn->nsyms; u++) {
-            fprintf(stream, "%*sSymbol %u:\n", indent - 3, "", u);
+            HDfprintf(stream, "%*sSymbol %u:\n", indent - 3, "", u);
 
             if(heap) {
                 const char *s = (const char *)H5HL_offset_into(heap, sn->entry[u].name_off);
 
                 if(s)
-                    fprintf(stream, "%*s%-*s `%s'\n", indent, "", fwidth, "Name:", s);
+                    HDfprintf(stream, "%*s%-*s `%s'\n", indent, "", fwidth, "Name:", s);
             } /* end if */
             else
-                fprintf(stream, "%*s%-*s\n", indent, "", fwidth, "Warning: Invalid heap address given, name not displayed!");
+                HDfprintf(stream, "%*s%-*s\n", indent, "", fwidth, "Warning: Invalid heap address given, name not displayed!");
 
             H5G__ent_debug(sn->entry + u, stream, indent, fwidth, heap);
         } /* end for */
     } /* end if */
 
 done:
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to release symbol table node")
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to release symbol table node")
     if(heap && H5HL_unprotect(heap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")
 
diff --git a/src/H5Gobj.c b/src/H5Gobj.c
index 92ad0af..af0e72c 100644
--- a/src/H5Gobj.c
+++ b/src/H5Gobj.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -60,7 +58,6 @@
 typedef struct {
     H5F_t      *f;              /* Pointer to file for insertion */
     haddr_t     oh_addr;        /* Address of the object header */
-    hid_t       dxpl_id;        /* DXPL during insertion */
     H5O_linfo_t *linfo;         /* Pointer to link info */
 } H5G_obj_oh_it_ud1_t;
 
@@ -78,7 +75,6 @@ typedef struct {
  */
 typedef struct {
     const H5O_loc_t   *grp_oloc;              /* Pointer to group for insertion */
-    hid_t       dxpl_id;                /* DXPL during insertion */
 } H5G_obj_stab_it_ud1_t;
 
 
@@ -92,8 +88,7 @@ typedef struct {
 /********************/
 static herr_t H5G_obj_compact_to_dense_cb(const void *_mesg, unsigned idx,
     void *_udata);
-static herr_t H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo,
-    hid_t dxpl_id);
+static herr_t H5G__obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo);
 
 
 /*********************/
@@ -126,8 +121,7 @@ static herr_t H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *li
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__obj_create(H5F_t *f, hid_t dxpl_id, H5G_obj_create_t *gcrt_info,
-    H5O_loc_t *oloc/*out*/)
+H5G__obj_create(H5F_t *f, H5G_obj_create_t *gcrt_info, H5O_loc_t *oloc/*out*/)
 {
     H5P_genplist_t  *gc_plist;          /* Group creation property list */
     H5O_ginfo_t ginfo;                  /* Group info */
@@ -160,7 +154,7 @@ H5G__obj_create(H5F_t *f, hid_t dxpl_id, H5G_obj_create_t *gcrt_info,
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get group info")
 
     /* Call the "real" group creation routine now */
-    if(H5G__obj_create_real(f, dxpl_id, &ginfo, &linfo, &pline, gcrt_info, oloc) < 0)
+    if(H5G__obj_create_real(f, &ginfo, &linfo, &pline, gcrt_info, oloc) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTCREATE, FAIL, "unable to create group")
 
 done:
@@ -182,12 +176,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__obj_create_real(H5F_t *f, hid_t dxpl_id, const H5O_ginfo_t *ginfo,
+H5G__obj_create_real(H5F_t *f, const H5O_ginfo_t *ginfo,
     const H5O_linfo_t *linfo, const H5O_pline_t *pline,
     H5G_obj_create_t *gcrt_info, H5O_loc_t *oloc/*out*/)
 {
     size_t hdr_size;                    /* Size of object header to request */
-    hbool_t use_latest_format;          /* Flag indicating the new group format should be used */
+    hbool_t use_at_least_v18;           /* Flag indicating the new group format should be used */
     hid_t gcpl_id = gcrt_info->gcpl_id; /* Group creation property list ID */
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -204,24 +198,23 @@ H5G__obj_create_real(H5F_t *f, hid_t dxpl_id, const H5O_ginfo_t *ginfo,
 
     /* Check for invalid access request */
     if(0 == (H5F_INTENT(f) & H5F_ACC_RDWR))
-	HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "no write intent on file")
+        HGOTO_ERROR(H5E_CACHE, H5E_BADVALUE, FAIL, "no write intent on file")
 
-    /* Check for using the latest version of the group format */
+    /* Check for using the latest version of the group format which is introduced in v18 */
     /* (add more checks for creating "new format" groups when needed) */
-    if(H5F_USE_LATEST_FLAGS(f, H5F_LATEST_STYLE_GROUP) || linfo->track_corder
-            || (pline && pline->nused))
-        use_latest_format = TRUE;
+    if((H5F_LOW_BOUND(f) >= H5F_LIBVER_V18) || linfo->track_corder || (pline && pline->nused))
+        use_at_least_v18 = TRUE;
     else
-        use_latest_format = FALSE;
+        use_at_least_v18 = FALSE;
 
     /* Make certain that the creation order is being tracked if an index is
      *  going to be built on it.
      */
     if(linfo->index_corder && !linfo->track_corder)
-	HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "must track creation order to create index for it")
+        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "must track creation order to create index for it")
 
     /* Check if we should be using the latest version of the group format */
-    if(use_latest_format) {
+    if(use_at_least_v18) {
         H5O_link_t lnk;                     /* Temporary link message info for computing message size */
         char null_char = '\0';              /* Character for creating null string */
         size_t ginfo_size;                  /* Size of the group info message */
@@ -263,32 +256,32 @@ H5G__obj_create_real(H5F_t *f, hid_t dxpl_id, const H5O_ginfo_t *ginfo,
      * since nothing refers to it yet.	The link count will be
      * incremented if the object is added to the group directed graph.
      */
-    if(H5O_create(f, dxpl_id, hdr_size, (size_t)1, gcpl_id, oloc/*out*/) < 0)
+    if(H5O_create(f, hdr_size, (size_t)1, gcpl_id, oloc/*out*/) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create header")
 
     /* Check for format of group to create */
-    if(use_latest_format) {
+    if(use_at_least_v18) {
         /* Insert link info message */
         /* (Casting away const OK - QAK) */
-        if(H5O_msg_create(oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, (void *)linfo, dxpl_id) < 0)
+        if(H5O_msg_create(oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, (void *)linfo) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
 
         /* Insert group info message */
         /* (Casting away const OK - QAK) */
-        if(H5O_msg_create(oloc, H5O_GINFO_ID, H5O_MSG_FLAG_CONSTANT, 0, (void *)ginfo, dxpl_id) < 0)
+        if(H5O_msg_create(oloc, H5O_GINFO_ID, H5O_MSG_FLAG_CONSTANT, 0, (void *)ginfo) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
 
         /* Insert pipeline message */
         if(pline && pline->nused)
             /* (Casting away const OK - QAK) */
-            if(H5O_msg_create(oloc, H5O_PLINE_ID, H5O_MSG_FLAG_CONSTANT, 0, (void *)pline, dxpl_id) < 0)
+            if(H5O_msg_create(oloc, H5O_PLINE_ID, H5O_MSG_FLAG_CONSTANT, 0, (void *)pline) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
     } /* end if */
     else {
         H5O_stab_t	stab;		/* Symbol table message	*/
 
         /* The group doesn't currently have a 'stab' message, go create one */
-        if(H5G__stab_create(oloc, dxpl_id, ginfo, &stab) < 0)
+        if(H5G__stab_create(oloc, ginfo, &stab) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create symbol table")
 
         /* Cache the symbol table information */
@@ -318,23 +311,23 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5G__obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo, hid_t dxpl_id)
+H5G__obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo)
 {
     H5B2_t *bt2_name = NULL;    /* v2 B-tree handle for name index */
     htri_t ret_value = FAIL;    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)
 
     /* check arguments */
     HDassert(grp_oloc);
     HDassert(linfo);
 
     /* Check for the group having a link info message */
-    if((ret_value = H5O_msg_exists(grp_oloc, H5O_LINFO_ID, dxpl_id)) < 0)
+    if((ret_value = H5O_msg_exists(grp_oloc, H5O_LINFO_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to read object header")
     if(ret_value) {
         /* Retrieve the "link info" structure */
-        if(NULL == H5O_msg_read(grp_oloc, H5O_LINFO_ID, linfo, dxpl_id))
+        if(NULL == H5O_msg_read(grp_oloc, H5O_LINFO_ID, linfo))
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "link info message not present")
 
         /* Check if we don't know how many links there are */
@@ -342,7 +335,7 @@ H5G__obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo, hid_t dxpl_id)
             /* Check if we are using "dense" link storage */
             if(H5F_addr_defined(linfo->fheap_addr)) {
                 /* Open the name index v2 B-tree */
-                if(NULL == (bt2_name = H5B2_open(grp_oloc->file, dxpl_id, linfo->name_bt2_addr, NULL)))
+                if(NULL == (bt2_name = H5B2_open(grp_oloc->file, linfo->name_bt2_addr, NULL)))
                     HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
                 /* Retrieve # of records in "name" B-tree */
@@ -352,7 +345,7 @@ H5G__obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo, hid_t dxpl_id)
             } /* end if */
             else {
                 /* Retrieve # of links from object header */
-                if(H5O_get_nlinks(grp_oloc, dxpl_id, &linfo->nlinks) < 0)
+                if(H5O_get_nlinks(grp_oloc, &linfo->nlinks) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve # of links for object")
             } /* end if */
         } /* end if */
@@ -360,10 +353,10 @@ H5G__obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo, hid_t dxpl_id)
 
 done:
     /* Release resources */
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "can't close v2 B-tree for name index")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__obj_get_linfo() */
 
 
@@ -388,18 +381,18 @@ H5G_obj_compact_to_dense_cb(const void *_mesg, unsigned H5_ATTR_UNUSED idx, void
     H5G_obj_oh_it_ud1_t *udata = (H5G_obj_oh_it_ud1_t *)_udata;     /* 'User data' passed in */
     herr_t ret_value = H5_ITER_CONT;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(udata->dxpl_id, udata->oh_addr, FAIL)
+    FUNC_ENTER_NOAPI_NOINIT_TAG(udata->oh_addr)
 
     /* check arguments */
     HDassert(lnk);
     HDassert(udata);
 
     /* Insert link into dense link storage */
-    if(H5G__dense_insert(udata->f, udata->dxpl_id, udata->linfo, lnk) < 0)
+    if(H5G__dense_insert(udata->f, udata->linfo, lnk) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link into dense storage")
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G_obj_compact_to_dense_cb() */
 
 
@@ -431,8 +424,7 @@ H5G_obj_stab_to_new_cb(const H5O_link_t *lnk, void *_udata)
 
     /* Insert link into group */
     /* (Casting away const OK - QAK) */
-    if(H5G_obj_insert(udata->grp_oloc, lnk->name, (H5O_link_t *)lnk, FALSE,
-            H5O_TYPE_UNKNOWN, NULL, udata->dxpl_id) < 0)
+    if(H5G_obj_insert(udata->grp_oloc, lnk->name, (H5O_link_t *)lnk, FALSE, H5O_TYPE_UNKNOWN, NULL) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, H5_ITER_ERROR, "can't insert link into group")
 
 done:
@@ -459,7 +451,7 @@ done:
  */
 herr_t
 H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
-    hbool_t adj_link, H5O_type_t obj_type, const void *crt_info, hid_t dxpl_id)
+    hbool_t adj_link, H5O_type_t obj_type, const void *crt_info)
 {
     H5O_pline_t tmp_pline;      /* Pipeline message */
     H5O_pline_t *pline = NULL;  /* Pointer to pipeline message */
@@ -469,7 +461,7 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
     hbool_t use_new_dense = FALSE;      /* Whether to use "dense" form of 'new format' group */
     herr_t ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(grp_oloc->addr, FAIL)
 
     /* check arguments */
     HDassert(grp_oloc && grp_oloc->file);
@@ -478,7 +470,7 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
 
     /* Check if we have information about the number of objects in this group */
     /* (by attempting to get the link info message for this group) */
-    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         H5O_ginfo_t ginfo;	/* Group info message */
@@ -502,7 +494,7 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
             HGOTO_ERROR(H5E_SYM, H5E_CANTGETSIZE, FAIL, "can't get link size")
 
         /* Get the group info */
-        if(NULL == H5O_msg_read(grp_oloc, H5O_GINFO_ID, &ginfo, dxpl_id))
+        if(NULL == H5O_msg_read(grp_oloc, H5O_GINFO_ID, &ginfo))
             HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get group info")
 
         /* If there's still a small enough number of links, use the 'link' message */
@@ -519,32 +511,31 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
             H5O_mesg_operator_t op;             /* Message operator */
 
             /* Get the pipeline message, if it exists */
-            if((pline_exists = H5O_msg_exists(grp_oloc, H5O_PLINE_ID, dxpl_id)) < 0)
+            if((pline_exists = H5O_msg_exists(grp_oloc, H5O_PLINE_ID)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to read object header")
             if(pline_exists) {
-                if(NULL == H5O_msg_read(grp_oloc, H5O_PLINE_ID, &tmp_pline, dxpl_id))
+                if(NULL == H5O_msg_read(grp_oloc, H5O_PLINE_ID, &tmp_pline))
                     HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get link pipeline")
                 pline = &tmp_pline;
             } /* end if */
 
             /* The group doesn't currently have "dense" storage for links */
-            if(H5G__dense_create(grp_oloc->file, dxpl_id, &linfo, pline) < 0)
+            if(H5G__dense_create(grp_oloc->file, &linfo, pline) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create 'dense' form of new format group")
 
             /* Set up user data for object header message iteration */
             udata.f = grp_oloc->file;
             udata.oh_addr = grp_oloc->addr;
-            udata.dxpl_id = dxpl_id;
             udata.linfo = &linfo;
 
             /* Iterate over the 'link' messages, inserting them into the dense link storage  */
             op.op_type = H5O_MESG_OP_APP;
             op.u.app_op = H5G_obj_compact_to_dense_cb;
-            if(H5O_msg_iterate(grp_oloc, H5O_LINK_ID, &op, &udata, dxpl_id) < 0)
+            if(H5O_msg_iterate(grp_oloc, H5O_LINK_ID, &op, &udata) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "error iterating over links")
 
             /* Remove all the 'link' messages */
-            if(H5O_msg_remove(grp_oloc, H5O_LINK_ID, H5O_ALL, FALSE, dxpl_id) < 0)
+            if(H5O_msg_remove(grp_oloc, H5O_LINK_ID, H5O_ALL, FALSE) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete link messages")
 
             use_new_dense = TRUE;
@@ -560,31 +551,29 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
             /* Convert group to "new format" group, in order to hold the information */
 
             /* Insert link info message */
-            if(H5O_msg_create(grp_oloc, H5O_LINFO_ID, 0, 0, &new_linfo, dxpl_id) < 0)
+            if(H5O_msg_create(grp_oloc, H5O_LINFO_ID, 0, 0, &new_linfo) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
 
             /* Insert group info message */
-            if(H5O_msg_create(grp_oloc, H5O_GINFO_ID, H5O_MSG_FLAG_CONSTANT, H5O_UPDATE_TIME, &new_ginfo, dxpl_id) < 0)
+            if(H5O_msg_create(grp_oloc, H5O_GINFO_ID, H5O_MSG_FLAG_CONSTANT, H5O_UPDATE_TIME, &new_ginfo) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
 
             /* Set up user data for iteration */
             udata.grp_oloc = grp_oloc;
-            udata.dxpl_id = dxpl_id;
 
             /* Iterate through all links in "old format" group and insert them into new format */
-            if(H5G__stab_iterate(grp_oloc, dxpl_id, H5_ITER_NATIVE, (hsize_t)0, NULL, H5G_obj_stab_to_new_cb, &udata) < 0)
+            if(H5G__stab_iterate(grp_oloc, H5_ITER_NATIVE, (hsize_t)0, NULL, H5G_obj_stab_to_new_cb, &udata) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over old format links")
 
             /* Remove the symbol table message from the group */
-            if(H5O_msg_remove(grp_oloc, H5O_STAB_ID, 0, FALSE, dxpl_id) < 0)
+            if(H5O_msg_remove(grp_oloc, H5O_STAB_ID, 0, FALSE) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete old format link storage")
 
             /* Recursively call this routine to insert the new link, since the
              *  group is in the "new format" now and the link info should be
              *  set up, etc.
              */
-            if(H5G_obj_insert(grp_oloc, name, obj_lnk, adj_link, obj_type,
-                    crt_info, dxpl_id) < 0)
+            if(H5G_obj_insert(grp_oloc, name, obj_lnk, adj_link, obj_type, crt_info) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link into group")
 
             /* Done with insertion now */
@@ -597,19 +586,18 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
     /* Insert into symbol table or "dense" storage */
     if(use_old_format) {
         /* Insert into symbol table */
-        if(H5G__stab_insert(grp_oloc, name, obj_lnk, obj_type, crt_info, dxpl_id)
-                < 0)
+        if(H5G__stab_insert(grp_oloc, name, obj_lnk, obj_type, crt_info) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert entry into symbol table")
     } /* end if */
     else {
         if(use_new_dense) {
             /* Insert into dense link storage */
-            if(H5G__dense_insert(grp_oloc->file, dxpl_id, &linfo, obj_lnk) < 0)
+            if(H5G__dense_insert(grp_oloc->file, &linfo, obj_lnk) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link into dense storage")
         } /* end if */
         else {
             /* Insert with link message */
-            if(H5G__compact_insert(grp_oloc, obj_lnk, dxpl_id) < 0)
+            if(H5G__compact_insert(grp_oloc, obj_lnk) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert link as link message")
         } /* end else */
     } /* end else */
@@ -617,7 +605,7 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
     /* Increment the number of objects in this group */
     if(!use_old_format) {
         linfo.nlinks++;
-        if(H5O_msg_write(grp_oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, &linfo, dxpl_id) < 0)
+        if(H5O_msg_write(grp_oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, &linfo) < 0)
             HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "can't update link info message")
     } /* end if */
 
@@ -631,7 +619,7 @@ H5G_obj_insert(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *obj_lnk,
         obj_oloc.addr = obj_lnk->u.hard.addr;
 
         /* Increment reference count for object */
-        if(H5O_link(&obj_oloc, 1, dxpl_id) < 0)
+        if(H5O_link(&obj_oloc, 1) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_LINKCOUNT, FAIL, "unable to increment hard link count")
     } /* end if */
 
@@ -640,7 +628,7 @@ done:
     if(pline && H5O_msg_reset(H5O_PLINE_ID, pline) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "can't release pipeline")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G_obj_insert() */
 
 
@@ -660,22 +648,22 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__obj_iterate(const H5O_loc_t *grp_oloc,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
-    H5G_lib_iterate_t op, void *op_data, hid_t dxpl_id)
+H5G__obj_iterate(const H5O_loc_t *grp_oloc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk, H5G_lib_iterate_t op,
+    void *op_data)
 {
     H5O_linfo_t	linfo;		/* Link info message */
     htri_t linfo_exists;        /* Whether the link info message exists */
     herr_t ret_value = FAIL;    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)
 
     /* Sanity check */
     HDassert(grp_oloc);
     HDassert(op);
 
     /* Attempt to get the link info for this group */
-    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Check for going out of bounds */
@@ -691,12 +679,12 @@ H5G__obj_iterate(const H5O_loc_t *grp_oloc,
 
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Iterate over the links in the group, building a table of the link messages */
-            if((ret_value = H5G__dense_iterate(grp_oloc->file, dxpl_id, &linfo, idx_type, order, skip, last_lnk, op, op_data)) < 0)
+            if((ret_value = H5G__dense_iterate(grp_oloc->file, &linfo, idx_type, order, skip, last_lnk, op, op_data)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "can't iterate over dense links")
         } /* end if */
         else {
             /* Get the object's name from the link messages */
-            if((ret_value = H5G__compact_iterate(grp_oloc, dxpl_id, &linfo, idx_type, order, skip, last_lnk, op, op_data)) < 0)
+            if((ret_value = H5G__compact_iterate(grp_oloc, &linfo, idx_type, order, skip, last_lnk, op, op_data)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "can't iterate over compact links")
         } /* end else */
     } /* end if */
@@ -706,12 +694,12 @@ H5G__obj_iterate(const H5O_loc_t *grp_oloc,
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no creation order index to query")
 
         /* Iterate over symbol table */
-        if((ret_value = H5G__stab_iterate(grp_oloc, dxpl_id, order, skip, last_lnk, op, op_data)) < 0)
+        if((ret_value = H5G__stab_iterate(grp_oloc, order, skip, last_lnk, op, op_data)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "can't iterate over symbol table")
     } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__obj_iterate() */
 
 
@@ -729,7 +717,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__obj_info(H5O_loc_t *oloc, H5G_info_t *grp_info, hid_t dxpl_id)
+H5G__obj_info(const H5O_loc_t *oloc, H5G_info_t *grp_info)
 {
     H5G_t *grp = NULL;                  /* Group to query */
     H5G_loc_t   grp_loc;                /* Entry of group to be queried */
@@ -751,18 +739,18 @@ H5G__obj_info(H5O_loc_t *oloc, H5G_info_t *grp_info, hid_t dxpl_id)
     H5G_loc_reset(&grp_loc);
 
     /* Deep copy (duplicate) of the group location object */
-    if(H5O_loc_copy(&grp_oloc, oloc, H5_COPY_DEEP) < 0)
+    if(H5O_loc_copy(&grp_oloc, (H5O_loc_t *)oloc, H5_COPY_DEEP) < 0)    /* (Casting away const OK - QAK) */
         HGOTO_ERROR(H5E_SYM, H5E_CANTCOPY, FAIL, "can't copy object location")
 
     /* Open the group */
-    if(NULL == (grp = H5G_open(&grp_loc, dxpl_id)))
+    if(NULL == (grp = H5G_open(&grp_loc)))
         HGOTO_ERROR(H5E_FILE, H5E_MOUNT, FAIL, "mount point not found")
 
     /* Get information from the group */
     grp_info->mounted = H5G_MOUNTED(grp);
 
     /* Attempt to get the link info for this group */
-    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Retrieve the information about the links */
@@ -777,7 +765,7 @@ H5G__obj_info(H5O_loc_t *oloc, H5G_info_t *grp_info, hid_t dxpl_id)
     } /* end if */
     else {
         /* Get the number of objects in this group by iterating over symbol table */
-        if(H5G__stab_count(oloc, &grp_info->nlinks, dxpl_id) < 0)
+        if(H5G__stab_count(oloc, &grp_info->nlinks) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTCOUNT, FAIL, "can't count objects")
 
         /* Set the other information about the group */
@@ -809,19 +797,19 @@ done:
  */
 ssize_t
 H5G_obj_get_name_by_idx(const H5O_loc_t *oloc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, char* name, size_t size, hid_t dxpl_id)
+    H5_iter_order_t order, hsize_t n, char* name, size_t size)
 {
     H5O_linfo_t	linfo;		/* Link info message */
     htri_t linfo_exists;        /* Whether the link info message exists */
     ssize_t ret_value = -1;     /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oloc->addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(oloc->addr, FAIL)
 
     /* Sanity check */
     HDassert(oloc && oloc->file);
 
     /* Attempt to get the link info for this group */
-    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Check for creation order tracking, if creation order index lookup requested */
@@ -834,12 +822,12 @@ H5G_obj_get_name_by_idx(const H5O_loc_t *oloc, H5_index_t idx_type,
         /* Check for dense link storage */
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Get the object's name from the dense link storage */
-            if((ret_value = H5G__dense_get_name_by_idx(oloc->file, dxpl_id, &linfo, idx_type, order, n, name, size)) < 0)
+            if((ret_value = H5G__dense_get_name_by_idx(oloc->file, &linfo, idx_type, order, n, name, size)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate name")
         } /* end if */
         else {
             /* Get the object's name from the link messages */
-            if((ret_value = H5G__compact_get_name_by_idx(oloc, dxpl_id, &linfo, idx_type, order, n, name, size)) < 0)
+            if((ret_value = H5G__compact_get_name_by_idx(oloc, &linfo, idx_type, order, n, name, size)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate name")
         } /* end else */
     } /* end if */
@@ -849,17 +837,17 @@ H5G_obj_get_name_by_idx(const H5O_loc_t *oloc, H5_index_t idx_type,
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no creation order index to query")
 
         /* Get the object's name from the symbol table */
-        if((ret_value = H5G__stab_get_name_by_idx(oloc, order, n, name, size, dxpl_id)) < 0)
+        if((ret_value = H5G__stab_get_name_by_idx(oloc, order, n, name, size)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate name")
     } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G_obj_get_name_by_idx() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_obj_remove_update_linfo
+ * Function:	H5G__obj_remove_update_linfo
  *
  * Purpose:     Update the link info after removing a link from a group
  *
@@ -872,11 +860,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxpl_id)
+H5G__obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo)
 {
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(oloc);
@@ -894,7 +882,7 @@ H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxp
         /* Check if there's no more links */
         if(linfo->nlinks == 0) {
             /* Delete the dense storage */
-            if(H5G__dense_delete(oloc->file, dxpl_id, linfo, FALSE) < 0)
+            if(H5G__dense_delete(oloc->file, linfo, FALSE) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete dense link storage")
         } /* end if */
         /* Check for switching back to compact storage */
@@ -902,7 +890,7 @@ H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxp
             H5O_ginfo_t ginfo;		/* Group info message            */
 
             /* Get the group info */
-            if(NULL == H5O_msg_read(oloc, H5O_GINFO_ID, &ginfo, dxpl_id))
+            if(NULL == H5O_msg_read(oloc, H5O_GINFO_ID, &ginfo))
                 HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get group info")
 
             /* Check if we should switch from dense storage back to link messages */
@@ -913,11 +901,11 @@ H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxp
                 size_t u;                       /* Local index */
 
                 /* Build the table of links for this group */
-                if(H5G__dense_build_table(oloc->file, dxpl_id, linfo, H5_INDEX_NAME, H5_ITER_NATIVE, &ltable) < 0)
+                if(H5G__dense_build_table(oloc->file, linfo, H5_INDEX_NAME, H5_ITER_NATIVE, &ltable) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over links")
 
                 /* Pin the object header */
-                if(NULL == (oh = H5O_pin(oloc, dxpl_id)))
+                if(NULL == (oh = H5O_pin(oloc)))
                     HGOTO_ERROR(H5E_SYM, H5E_CANTPIN, FAIL, "unable to pin group object header")
 
                 /* Inspect links in table for ones that can't be converted back
@@ -934,7 +922,7 @@ H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxp
                 if(can_convert) {
                     /* Insert link messages into group */
                     for(u = 0; u < linfo->nlinks; u++)
-                        if(H5O_msg_append_oh(oloc->file, dxpl_id, oh, H5O_LINK_ID, 0, H5O_UPDATE_TIME, &(ltable.lnks[u])) < 0) {
+                        if(H5O_msg_append_oh(oloc->file, oh, H5O_LINK_ID, 0, H5O_UPDATE_TIME, &(ltable.lnks[u])) < 0) {
                             /* Release object header */
                             if(H5O_unpin(oh) < 0)
                                 HDONE_ERROR(H5E_SYM, H5E_CANTUNPIN, FAIL, "unable to unpin group object header")
@@ -943,7 +931,7 @@ H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxp
                         } /* end if */
 
                     /* Remove the dense storage */
-                    if(H5G__dense_delete(oloc->file, dxpl_id, linfo, FALSE) < 0)
+                    if(H5G__dense_delete(oloc->file, linfo, FALSE) < 0)
                         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete dense link storage")
                 } /* end if */
 
@@ -959,12 +947,12 @@ H5G_obj_remove_update_linfo(const H5O_loc_t *oloc, H5O_linfo_t *linfo, hid_t dxp
     } /* end if */
 
     /* Update link info in the object header */
-    if(H5O_msg_write(oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, linfo, dxpl_id) < 0)
+    if(H5O_msg_write(oloc, H5O_LINFO_ID, 0, H5O_UPDATE_TIME, linfo) < 0)
         HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "can't update link info message")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_obj_remove_update_linfo() */
+} /* end H5G__obj_remove_update_linfo() */
 
 
 /*-------------------------------------------------------------------------
@@ -981,21 +969,21 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G_obj_remove(const H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r, const char *name, hid_t dxpl_id)
+H5G_obj_remove(const H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r, const char *name)
 {
     H5O_linfo_t	linfo;		/* Link info message            */
     htri_t linfo_exists;        /* Whether the link info message exists */
     hbool_t     use_old_format; /* Whether to use 'old format' (symbol table) for deletion or not */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oloc->addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(oloc->addr, FAIL)
 
     /* Sanity check */
     HDassert(oloc);
     HDassert(name && *name);
 
     /* Attempt to get the link info for this group */
-    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Using the new format for groups */
@@ -1004,31 +992,30 @@ H5G_obj_remove(const H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r, const char *n
         /* Check for dense or compact storage */
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Remove object from the dense link storage */
-            if(H5G__dense_remove(oloc->file, dxpl_id, &linfo, grp_full_path_r, name) < 0)
+            if(H5G__dense_remove(oloc->file, &linfo, grp_full_path_r, name) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
         } /* end if */
-        else {
+        else
             /* Remove object from the link messages */
-            if(H5G__compact_remove(oloc, dxpl_id, grp_full_path_r, name) < 0)
+            if(H5G__compact_remove(oloc, grp_full_path_r, name) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
-        } /* end else */
     } /* end if */
     else {
         /* Using the old format for groups */
         use_old_format = TRUE;
 
         /* Remove object from the symbol table */
-        if(H5G__stab_remove(oloc, dxpl_id, grp_full_path_r, name) < 0)
+        if(H5G__stab_remove(oloc, grp_full_path_r, name) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
     } /* end else */
 
     /* Update link info for a new-style group */
     if(!use_old_format)
-        if(H5G_obj_remove_update_linfo(oloc, &linfo, dxpl_id) < 0)
+        if(H5G__obj_remove_update_linfo(oloc, &linfo) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTUPDATE, FAIL, "unable to update link info")
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G_obj_remove() */
 
 
@@ -1047,20 +1034,20 @@ done:
  */
 herr_t
 H5G_obj_remove_by_idx(const H5O_loc_t *grp_oloc, H5RS_str_t *grp_full_path_r,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t dxpl_id)
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n)
 {
     H5O_linfo_t	linfo;		/* Link info message            */
     htri_t linfo_exists;        /* Whether the link info message exists */
     hbool_t     use_old_format; /* Whether to use 'old format' (symbol table) for deletion or not */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(grp_oloc->addr, FAIL)
 
     /* Sanity check */
     HDassert(grp_oloc && grp_oloc->file);
 
     /* Attempt to get the link info for this group */
-    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Check for creation order tracking, if creation order index lookup requested */
@@ -1076,12 +1063,12 @@ H5G_obj_remove_by_idx(const H5O_loc_t *grp_oloc, H5RS_str_t *grp_full_path_r,
         /* Check for dense or compact storage */
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Remove object from the dense link storage */
-            if(H5G__dense_remove_by_idx(grp_oloc->file, dxpl_id, &linfo, grp_full_path_r, idx_type, order, n) < 0)
+            if(H5G__dense_remove_by_idx(grp_oloc->file, &linfo, grp_full_path_r, idx_type, order, n) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
         } /* end if */
         else {
             /* Remove object from compact link storage */
-            if(H5G__compact_remove_by_idx(grp_oloc, dxpl_id, &linfo, grp_full_path_r, idx_type, order, n) < 0)
+            if(H5G__compact_remove_by_idx(grp_oloc, &linfo, grp_full_path_r, idx_type, order, n) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
         } /* end else */
     } /* end if */
@@ -1094,18 +1081,17 @@ H5G_obj_remove_by_idx(const H5O_loc_t *grp_oloc, H5RS_str_t *grp_full_path_r,
         use_old_format = TRUE;
 
         /* Remove object from the symbol table */
-        if(H5G__stab_remove_by_idx(grp_oloc, dxpl_id, grp_full_path_r, order, n) < 0)
+        if(H5G__stab_remove_by_idx(grp_oloc, grp_full_path_r, order, n) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't remove object")
     } /* end else */
 
     /* Update link info for a new-style group */
-    if(!use_old_format) {
-        if(H5G_obj_remove_update_linfo(grp_oloc, &linfo, dxpl_id) < 0)
+    if(!use_old_format)
+        if(H5G__obj_remove_update_linfo(grp_oloc, &linfo) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTUPDATE, FAIL, "unable to update link info")
-    } /* end if */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G_obj_remove() */
 
 
@@ -1123,43 +1109,41 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5G__obj_lookup(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk,
-    hid_t dxpl_id)
+H5G__obj_lookup(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk)
 {
     H5O_linfo_t linfo;		        /* Link info message */
     htri_t linfo_exists;                /* Whether the link info message exists */
     htri_t     ret_value = FALSE;       /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)
 
     /* check arguments */
     HDassert(grp_oloc && grp_oloc->file);
     HDassert(name && *name);
 
     /* Attempt to get the link info message for this group */
-    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Check for dense link storage */
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Get the object's info from the dense link storage */
-            if((ret_value = H5G__dense_lookup(grp_oloc->file, dxpl_id, &linfo, name, lnk)) < 0)
+            if((ret_value = H5G__dense_lookup(grp_oloc->file, &linfo, name, lnk)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
         } /* end if */
         else {
             /* Get the object's info from the link messages */
-            if((ret_value = H5G__compact_lookup(grp_oloc, name, lnk, dxpl_id)) < 0)
+            if((ret_value = H5G__compact_lookup(grp_oloc, name, lnk)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
         } /* end else */
     } /* end if */
-    else {
+    else
         /* Get the object's info from the symbol table */
-        if((ret_value = H5G__stab_lookup(grp_oloc, name, lnk, dxpl_id)) < 0)
+        if((ret_value = H5G__stab_lookup(grp_oloc, name, lnk)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
-    } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__obj_lookup() */
 
 
@@ -1179,19 +1163,19 @@ done:
  */
 herr_t
 H5G_obj_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, H5O_link_t *lnk, hid_t dxpl_id)
+    H5_iter_order_t order, hsize_t n, H5O_link_t *lnk)
 {
     H5O_linfo_t linfo;		        /* Link info message */
     htri_t linfo_exists;                /* Whether the link info message exists */
     herr_t     ret_value = SUCCEED;     /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(grp_oloc->addr, FAIL)
 
     /* check arguments */
     HDassert(grp_oloc && grp_oloc->file);
 
     /* Attempt to get the link info message for this group */
-    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo, dxpl_id)) < 0)
+    if((linfo_exists = H5G__obj_get_linfo(grp_oloc, &linfo)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check for link info message")
     if(linfo_exists) {
         /* Check for creation order tracking, if creation order index lookup requested */
@@ -1204,12 +1188,12 @@ H5G_obj_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_index_t idx_type,
         /* Check for dense link storage */
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Get the link from the dense storage */
-            if(H5G__dense_lookup_by_idx(grp_oloc->file, dxpl_id, &linfo, idx_type, order, n, lnk) < 0)
+            if(H5G__dense_lookup_by_idx(grp_oloc->file, &linfo, idx_type, order, n, lnk) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
         } /* end if */
         else {
             /* Get the link from the link messages */
-            if(H5G__compact_lookup_by_idx(grp_oloc, dxpl_id, &linfo, idx_type, order, n, lnk) < 0)
+            if(H5G__compact_lookup_by_idx(grp_oloc, &linfo, idx_type, order, n, lnk) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
         } /* end else */
     } /* end if */
@@ -1219,11 +1203,11 @@ H5G_obj_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_index_t idx_type,
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "no creation order index to query")
 
         /* Get the object's info from the symbol table */
-        if(H5G__stab_lookup_by_idx(grp_oloc, order, n, lnk, dxpl_id) < 0)
+        if(H5G__stab_lookup_by_idx(grp_oloc, order, n, lnk) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't locate object")
     } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G_obj_lookup_by_idx() */
 
diff --git a/src/H5Goh.c b/src/H5Goh.c
index bde540c..38570f9 100644
--- a/src/H5Goh.c
+++ b/src/H5Goh.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -45,15 +43,13 @@
 /* Local Prototypes */
 /********************/
 
-static void *H5O_group_get_copy_file_udata(void);
-static void H5O_group_free_copy_file_udata(void *udata);
-static htri_t H5O_group_isa(H5O_t *loc);
-static hid_t H5O_group_open(const H5G_loc_t *obj_loc, hid_t lapl_id,
-    hid_t dxpl_id, hbool_t app_ref);
-static void *H5O_group_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc,
-    hid_t dxpl_id);
-static H5O_loc_t *H5O_group_get_oloc(hid_t obj_id);
-static herr_t H5O_group_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh,
+static void *H5O__group_get_copy_file_udata(void);
+static void H5O__group_free_copy_file_udata(void *udata);
+static htri_t H5O__group_isa(const H5O_t *loc);
+static hid_t H5O__group_open(const H5G_loc_t *obj_loc, hbool_t app_ref);
+static void *H5O__group_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc);
+static H5O_loc_t *H5O__group_get_oloc(hid_t obj_id);
+static herr_t H5O__group_bh_info(const H5O_loc_t *loc, H5O_t *oh,
     H5_ih_info_t *bh_info);
 
 
@@ -75,13 +71,13 @@ static herr_t H5O_group_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh,
 const H5O_obj_class_t H5O_OBJ_GROUP[1] = {{
     H5O_TYPE_GROUP,		/* object type			*/
     "group",			/* object name, for debugging	*/
-    H5O_group_get_copy_file_udata, /* get 'copy file' user data	*/
-    H5O_group_free_copy_file_udata, /* free 'copy file' user data */
-    H5O_group_isa, 		/* "isa" message		*/
-    H5O_group_open, 		/* open an object of this class */
-    H5O_group_create, 		/* create an object of this class */
-    H5O_group_get_oloc,		/* get an object header location for an object */
-    H5O_group_bh_info, 		/* get the index & heap info for an object */
+    H5O__group_get_copy_file_udata, /* get 'copy file' user data	*/
+    H5O__group_free_copy_file_udata, /* free 'copy file' user data */
+    H5O__group_isa, 		/* "isa" message		*/
+    H5O__group_open, 		/* open an object of this class */
+    H5O__group_create, 		/* create an object of this class */
+    H5O__group_get_oloc,	/* get an object header location for an object */
+    H5O__group_bh_info, 	/* get the index & heap info for an object */
     NULL 			/* flush an opened object of this class */
 }};
 
@@ -90,7 +86,7 @@ H5FL_DEFINE(H5G_copy_file_ud_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_group_get_copy_file_udata
+ * Function:	H5O__group_get_copy_file_udata
  *
  * Purpose:	Allocates the user data needed for copying a group's
  *		object header from file to file.
@@ -105,11 +101,11 @@ H5FL_DEFINE(H5G_copy_file_ud_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_group_get_copy_file_udata(void)
+H5O__group_get_copy_file_udata(void)
 {
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Allocate space for the 'copy file' user data for copying groups.
      * Currently this is only a ginfo, so there is no specific struct type for
@@ -119,11 +115,11 @@ H5O_group_get_copy_file_udata(void)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_group_get_copy_file_udata() */
+} /* end H5O__group_get_copy_file_udata() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_group_free_copy_file_udata
+ * Function:	H5O__group_free_copy_file_udata
  *
  * Purpose:	Release the user data needed for copying a group's
  *		object header from file to file.
@@ -136,11 +132,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static void
-H5O_group_free_copy_file_udata(void *_udata)
+H5O__group_free_copy_file_udata(void *_udata)
 {
     H5G_copy_file_ud_t *udata = (H5G_copy_file_ud_t *)_udata;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Sanity check */
     HDassert(udata);
@@ -152,11 +148,11 @@ H5O_group_free_copy_file_udata(void *_udata)
     udata = H5FL_FREE(H5G_copy_file_ud_t, udata);
 
     FUNC_LEAVE_NOAPI_VOID
-} /* end H5O_group_free_copy_file_udata() */
+} /* end H5O__group_free_copy_file_udata() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_group_isa
+ * Function:	H5O__group_isa
  *
  * Purpose:	Determines if an object has the requisite messages for being
  *		a group.
@@ -173,13 +169,13 @@ H5O_group_free_copy_file_udata(void *_udata)
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_group_isa(struct H5O_t *oh)
+H5O__group_isa(const H5O_t *oh)
 {
     htri_t	stab_exists;            /* Whether the 'stab' message is in the object header */
     htri_t	linfo_exists;           /* Whether the 'linfo' message is in the object header */
     htri_t	ret_value = FAIL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(oh);
 
@@ -193,11 +189,11 @@ H5O_group_isa(struct H5O_t *oh)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_group_isa() */
+} /* end H5O__group_isa() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_group_open
+ * Function:	H5O__group_open
  *
  * Purpose:	Open a group at a particular location
  *
@@ -210,17 +206,17 @@ done:
  *-------------------------------------------------------------------------
  */
 static hid_t
-H5O_group_open(const H5G_loc_t *obj_loc, hid_t H5_ATTR_UNUSED lapl_id, hid_t dxpl_id, hbool_t app_ref)
+H5O__group_open(const H5G_loc_t *obj_loc, hbool_t app_ref)
 {
     H5G_t       *grp = NULL;            /* Group opened */
     hid_t	ret_value = H5I_INVALID_HID;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(obj_loc);
 
     /* Open the group */
-    if(NULL == (grp = H5G_open(obj_loc, dxpl_id)))
+    if(NULL == (grp = H5G_open(obj_loc)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
 
     /* Register an ID for the group */
@@ -233,11 +229,11 @@ done:
             HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, FAIL, "unable to release group")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_group_open() */
+} /* end H5O__group_open() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_group_create
+ * Function:	H5O__group_create
  *
  * Purpose:	Create a group in a file
  *
@@ -250,13 +246,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_group_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id)
+H5O__group_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc)
 {
     H5G_obj_create_t *crt_info = (H5G_obj_create_t *)_crt_info; /* Group creation parameters */
     H5G_t *grp = NULL;          /* New group created */
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(f);
@@ -264,7 +260,7 @@ H5O_group_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id)
     HDassert(obj_loc);
 
     /* Create the the group */
-    if(NULL == (grp = H5G__create(f, crt_info, dxpl_id)))
+    if(NULL == (grp = H5G__create(f, crt_info)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "unable to create group")
 
     /* Set up the new group's location */
@@ -282,11 +278,11 @@ done:
             HDONE_ERROR(H5E_SYM, H5E_CLOSEERROR, NULL, "unable to release group")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_group_create() */
+} /* end H5O__group_create() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_group_get_oloc
+ * Function:	H5O__group_get_oloc
  *
  * Purpose:	Retrieve the object header location for an open object
  *
@@ -299,12 +295,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5O_loc_t *
-H5O_group_get_oloc(hid_t obj_id)
+H5O__group_get_oloc(hid_t obj_id)
 {
     H5G_t       *grp;                   /* Group opened */
     H5O_loc_t	*ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Get the group */
     if(NULL ==  (grp = (H5G_t *)H5I_object(obj_id)))
@@ -316,11 +312,11 @@ H5O_group_get_oloc(hid_t obj_id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_group_get_oloc() */
+} /* end H5O__group_get_oloc() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_group_bh_info
+ * Function:    H5O__group_bh_info
  *
  * Purpose:     Retrieve storage for 1.8 btree and heap
  *		Retrieve storage for 1.6 btree and heap via H5G_stab_bh_info()
@@ -333,7 +329,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_group_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *bh_info)
+H5O__group_bh_info(const H5O_loc_t *loc, H5O_t *oh, H5_ih_info_t *bh_info)
 {
     htri_t	exists;                 /* Flag if header message of interest exists */
     H5HF_t      *fheap = NULL;          /* Fractal heap handle */
@@ -341,7 +337,7 @@ H5O_group_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *
     H5B2_t      *bt2_corder = NULL;     /* v2 B-tree handle for creation order index */
     herr_t      ret_value = SUCCEED;  	/* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, oh->cache_info.addr, FAIL)
+    FUNC_ENTER_STATIC_TAG(oh->cache_info.addr)
 
     /* Sanity check */
     HDassert(loc);
@@ -357,39 +353,39 @@ H5O_group_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *
         H5O_linfo_t linfo;          	/* Link info message */
 
         /* Get "new style" group info */
-        if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_LINFO_ID, &linfo))
+        if(NULL == H5O_msg_read_oh(loc->file, oh, H5O_LINFO_ID, &linfo))
 	    HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't read LINFO message")
 
         /* Check if name index available */
         if(H5F_addr_defined(linfo.name_bt2_addr)) {
             /* Open the name index v2 B-tree */
-            if(NULL == (bt2_name = H5B2_open(loc->file, dxpl_id, linfo.name_bt2_addr, NULL)))
+            if(NULL == (bt2_name = H5B2_open(loc->file, linfo.name_bt2_addr, NULL)))
                 HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
             /* Get name index B-tree size */
-            if(H5B2_size(bt2_name, dxpl_id, &bh_info->index_size) < 0)
+            if(H5B2_size(bt2_name, &bh_info->index_size) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve B-tree storage info for name index")
         } /* end if */
 
         /* Check if creation order index available */
 	if(H5F_addr_defined(linfo.corder_bt2_addr)) {
             /* Open the creation order index v2 B-tree */
-            if(NULL == (bt2_corder = H5B2_open(loc->file, dxpl_id, linfo.corder_bt2_addr, NULL)))
+            if(NULL == (bt2_corder = H5B2_open(loc->file, linfo.corder_bt2_addr, NULL)))
                 HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
             /* Get creation order index B-tree size */
-            if(H5B2_size(bt2_corder, dxpl_id, &bh_info->index_size) < 0)
+            if(H5B2_size(bt2_corder, &bh_info->index_size) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve B-tree storage info for creation order index")
         } /* end if */
 
         /* Get fractal heap size, if available */
         if(H5F_addr_defined(linfo.fheap_addr)) {
             /* Open the fractal heap for links */
-            if(NULL == (fheap = H5HF_open(loc->file, dxpl_id, linfo.fheap_addr)))
+            if(NULL == (fheap = H5HF_open(loc->file, linfo.fheap_addr)))
                 HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
             /* Get heap storage size */
-            if(H5HF_size(fheap, dxpl_id, &bh_info->heap_size) < 0)
+            if(H5HF_size(fheap, &bh_info->heap_size) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve fractal heap storage info")
         } /* end if */
     } /* end if */
@@ -397,23 +393,23 @@ H5O_group_bh_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *
         H5O_stab_t          stab;       	/* Info about symbol table */
 
         /* Must be "old style" group, get symbol table message */
-        if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_STAB_ID, &stab))
+        if(NULL == H5O_msg_read_oh(loc->file, oh, H5O_STAB_ID, &stab))
 	    HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't find LINFO nor STAB messages")
 
         /* Get symbol table size info */
-        if(H5G__stab_bh_size(loc->file, dxpl_id, &stab, bh_info) < 0)
+        if(H5G__stab_bh_size(loc->file, &stab, bh_info) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't retrieve symbol table size info")
     } /* end else */
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for creation order index")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_group_bh_info() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__group_bh_info() */
 
diff --git a/src/H5Gpkg.h b/src/H5Gpkg.h
index 1e8ad31..f0a9aea 100644
--- a/src/H5Gpkg.h
+++ b/src/H5Gpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -269,7 +267,6 @@ typedef struct H5G_dense_bt2_corder_rec_t {
 typedef struct H5G_bt2_ud_common_t {
     /* downward */
     H5F_t       *f;                     /* Pointer to file that fractal heap is in */
-    hid_t       dxpl_id;                /* DXPL for operation                */
     H5HF_t      *fheap;                 /* Fractal heap handle               */
     const char  *name;                  /* Name of link to compare           */
     uint32_t    name_hash;              /* Hash of name of link to compare   */
@@ -331,19 +328,27 @@ H5FL_EXTERN(H5G_shared_t);
 /*
  * General group routines
  */
-H5_DLL H5G_t *H5G__create(H5F_t *file, H5G_obj_create_t *gcrt_info,
-    hid_t dxpl_id);
+H5_DLL H5G_t *H5G__create(H5F_t *file, H5G_obj_create_t *gcrt_info);
 H5_DLL H5G_t *H5G__create_named(const H5G_loc_t *loc, const char *name,
-    hid_t lcpl_id, hid_t gcpl_id, hid_t gapl_id, hid_t dxpl_id);
-H5_DLL H5G_t *H5G__open_name(const H5G_loc_t *loc, const char *name,
-    hid_t gapl_id, hid_t dxpl_id);
+    hid_t lcpl_id, hid_t gcpl_id);
+H5_DLL H5G_t *H5G__create_anon(H5F_t *file, H5G_obj_create_t *gcrt_info);
+H5_DLL H5G_t *H5G__open_name(const H5G_loc_t *loc, const char *name);
+H5_DLL hid_t H5G__get_create_plist(const H5G_t *grp);
+H5_DLL herr_t H5G__get_info(const H5G_loc_t *loc, H5G_info_t *grp_info);
+H5_DLL herr_t H5G__get_info_by_name(const H5G_loc_t *loc, const char *name,
+    H5G_info_t *grp_info);
+H5_DLL herr_t H5G__get_info_by_idx(const H5G_loc_t *loc, const char *group_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, H5G_info_t *grp_info);
+H5_DLL herr_t H5G__flush(H5G_t *grp, hid_t group_id);
+H5_DLL herr_t H5G__refresh(H5G_t *grp, hid_t group_id);
+H5_DLL herr_t H5G__close_cb(H5G_t *grp);
 
 /*
  * Group hierarchy traversal routines
  */
 H5_DLL herr_t H5G__traverse_special(const H5G_loc_t *grp_loc,
-    const H5O_link_t *lnk, unsigned target, size_t *nlinks, hbool_t last_comp,
-    H5G_loc_t *obj_loc, hbool_t *obj_exists, hid_t lapl_id, hid_t dxpl_id);
+    const H5O_link_t *lnk, unsigned target, hbool_t last_comp,
+    H5G_loc_t *obj_loc, hbool_t *obj_exists);
 
 /*
  * Utility functions
@@ -355,38 +360,35 @@ H5_DLL const char *H5G__component(const char *name, size_t *size_p);
  * functions that understand names are exported to the rest of
  * the library and appear in H5Gprivate.h.
  */
-H5_DLL herr_t H5G__stab_create(H5O_loc_t *grp_oloc, hid_t dxpl_id,
-    const H5O_ginfo_t *ginfo, H5O_stab_t *stab);
-H5_DLL herr_t H5G__stab_create_components(H5F_t *f, H5O_stab_t *stab, size_t size_hint, hid_t dxpl_id);
+H5_DLL herr_t H5G__stab_create(H5O_loc_t *grp_oloc, const H5O_ginfo_t *ginfo,
+    H5O_stab_t *stab);
+H5_DLL herr_t H5G__stab_create_components(H5F_t *f, H5O_stab_t *stab, size_t size_hint);
 H5_DLL herr_t H5G__stab_insert(const H5O_loc_t *grp_oloc, const char *name,
-    H5O_link_t *obj_lnk, H5O_type_t obj_type, const void *crt_info,
-    hid_t dxpl_id);
+    H5O_link_t *obj_lnk, H5O_type_t obj_type, const void *crt_info);
 H5_DLL herr_t H5G__stab_insert_real(H5F_t *f, const H5O_stab_t *stab,
     const char *name, H5O_link_t *obj_lnk, H5O_type_t obj_type,
-    const void *crt_info, hid_t dxpl_id);
-H5_DLL herr_t H5G__stab_delete(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab);
-H5_DLL herr_t H5G__stab_iterate(const H5O_loc_t *oloc, hid_t dxpl_id, H5_iter_order_t order,
+    const void *crt_info);
+H5_DLL herr_t H5G__stab_delete(H5F_t *f, const H5O_stab_t *stab);
+H5_DLL herr_t H5G__stab_iterate(const H5O_loc_t *oloc, H5_iter_order_t order,
     hsize_t skip, hsize_t *last_lnk, H5G_lib_iterate_t op, void *op_data);
-H5_DLL herr_t H5G__stab_count(struct H5O_loc_t *oloc, hsize_t *num_objs, hid_t dxpl_id);
-H5_DLL herr_t H5G__stab_bh_size(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab,
+H5_DLL herr_t H5G__stab_count(const struct H5O_loc_t *oloc, hsize_t *num_objs);
+H5_DLL herr_t H5G__stab_bh_size(H5F_t *f, const H5O_stab_t *stab,
     H5_ih_info_t *bh_info);
 H5_DLL ssize_t H5G__stab_get_name_by_idx(const H5O_loc_t *oloc, H5_iter_order_t order,
-    hsize_t n, char* name, size_t size, hid_t dxpl_id);
-H5_DLL herr_t H5G__stab_remove(const H5O_loc_t *oloc, hid_t dxpl_id,
-    H5RS_str_t *grp_full_path_r, const char *name);
-H5_DLL herr_t H5G__stab_remove_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
+    hsize_t n, char* name, size_t size);
+H5_DLL herr_t H5G__stab_remove(const H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r,
+    const char *name);
+H5_DLL herr_t H5G__stab_remove_by_idx(const H5O_loc_t *oloc, 
     H5RS_str_t *grp_full_path_r, H5_iter_order_t order, hsize_t n);
 H5_DLL herr_t H5G__stab_lookup(const H5O_loc_t *grp_oloc, const char *name,
-    H5O_link_t *lnk, hid_t dxpl_id);
+    H5O_link_t *lnk);
 H5_DLL herr_t H5G__stab_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_iter_order_t order,
-    hsize_t n, H5O_link_t *lnk, hid_t dxpl_id);
+    hsize_t n, H5O_link_t *lnk);
 #ifndef H5_STRICT_FORMAT_CHECKS
-H5_DLL herr_t H5G__stab_valid(H5O_loc_t *grp_oloc, hid_t dxpl_id,
-    H5O_stab_t *alt_stab);
+H5_DLL herr_t H5G__stab_valid(H5O_loc_t *grp_oloc, H5O_stab_t *alt_stab);
 #endif /* H5_STRICT_FORMAT_CHECKS */
 #ifndef H5_NO_DEPRECATED_SYMBOLS
-H5_DLL H5G_obj_t H5G__stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx,
-    hid_t dxpl_id);
+H5_DLL H5G_obj_t H5G__stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx);
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
 
@@ -397,28 +399,28 @@ H5_DLL void H5G__ent_copy(H5G_entry_t *dst, const H5G_entry_t *src,
             H5_copy_depth_t depth);
 H5_DLL void H5G__ent_reset(H5G_entry_t *ent);
 H5_DLL herr_t H5G__ent_decode_vec(const H5F_t *f, const uint8_t **pp,
-				  H5G_entry_t *ent, unsigned n);
+				  const uint8_t *p_end, H5G_entry_t *ent, unsigned n);
 H5_DLL herr_t H5G__ent_encode_vec(const H5F_t *f, uint8_t **pp,
 				  const H5G_entry_t *ent, unsigned n);
-H5_DLL herr_t H5G__ent_convert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap,
-    const char *name, const H5O_link_t *lnk, H5O_type_t obj_type,
-    const void *crt_info, H5G_entry_t *ent);
+H5_DLL herr_t H5G__ent_convert(H5F_t *f, H5HL_t *heap, const char *name,
+    const H5O_link_t *lnk, H5O_type_t obj_type, const void *crt_info,
+    H5G_entry_t *ent);
 H5_DLL herr_t H5G__ent_debug(const H5G_entry_t *ent, FILE * stream, int indent,
     int fwidth, const H5HL_t *heap);
 
 /* Functions that understand symbol table nodes */
 H5_DLL herr_t H5G__node_init(H5F_t *f);
-H5_DLL int H5G__node_iterate(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
+H5_DLL int H5G__node_iterate(H5F_t *f, const void *_lt_key, haddr_t addr,
 		     const void *_rt_key, void *_udata);
-H5_DLL int H5G__node_sumup(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
+H5_DLL int H5G__node_sumup(H5F_t *f, const void *_lt_key, haddr_t addr,
 		     const void *_rt_key, void *_udata);
-H5_DLL int H5G__node_by_idx(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
+H5_DLL int H5G__node_by_idx(H5F_t *f, const void *_lt_key, haddr_t addr,
 		     const void *_rt_key, void *_udata);
-H5_DLL int H5G__node_copy(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
+H5_DLL int H5G__node_copy(H5F_t *f, const void *_lt_key, haddr_t addr,
 		     const void *_rt_key, void *_udata);
-H5_DLL int H5G__node_build_table(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
+H5_DLL int H5G__node_build_table(H5F_t *f, const void *_lt_key, haddr_t addr,
 		     const void *_rt_key, void *_udata);
-H5_DLL herr_t H5G__node_iterate_size(H5F_t *f, hid_t dxpl_id, const void *_lt_key, haddr_t addr,
+H5_DLL herr_t H5G__node_iterate_size(H5F_t *f, const void *_lt_key, haddr_t addr,
                      const void *_rt_key, void *_udata);
 H5_DLL herr_t H5G__node_free(H5G_node_t *sym);
 
@@ -432,78 +434,73 @@ H5_DLL herr_t H5G__link_sort_table(H5G_link_table_t *ltable, H5_index_t idx_type
 H5_DLL herr_t H5G__link_iterate_table(const H5G_link_table_t *ltable,
     hsize_t skip, hsize_t *last_lnk, const H5G_lib_iterate_t op, void *op_data);
 H5_DLL herr_t H5G__link_release_table(H5G_link_table_t *ltable);
-H5_DLL herr_t H5G__link_name_replace(H5F_t *file, hid_t dxpl_id,
-    H5RS_str_t *grp_full_path_r, const H5O_link_t *lnk);
+H5_DLL herr_t H5G__link_name_replace(H5F_t *file, H5RS_str_t *grp_full_path_r,
+    const H5O_link_t *lnk);
 
 /* Functions that understand "compact" link storage */
-H5_DLL herr_t H5G__compact_insert(const H5O_loc_t *grp_oloc, H5O_link_t *obj_lnk,
-    hid_t dxpl_id);
-H5_DLL ssize_t H5G__compact_get_name_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
+H5_DLL herr_t H5G__compact_insert(const H5O_loc_t *grp_oloc, H5O_link_t *obj_lnk);
+H5_DLL ssize_t H5G__compact_get_name_by_idx(const H5O_loc_t *oloc,
     const H5O_linfo_t *linfo, H5_index_t idx_type, H5_iter_order_t order,
     hsize_t idx, char *name, size_t size);
-H5_DLL herr_t H5G__compact_remove(const H5O_loc_t *oloc, hid_t dxpl_id,
-    H5RS_str_t *grp_full_path_r, const char *name);
-H5_DLL herr_t H5G__compact_remove_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
+H5_DLL herr_t H5G__compact_remove(const H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r,
+    const char *name);
+H5_DLL herr_t H5G__compact_remove_by_idx(const H5O_loc_t *oloc, 
     const H5O_linfo_t *linfo, H5RS_str_t *grp_full_path_r, H5_index_t idx_type,
     H5_iter_order_t order, hsize_t n);
-H5_DLL herr_t H5G__compact_iterate(const H5O_loc_t *oloc, hid_t dxpl_id,
+H5_DLL herr_t H5G__compact_iterate(const H5O_loc_t *oloc,
     const H5O_linfo_t *linfo, H5_index_t idx_type, H5_iter_order_t order,
     hsize_t skip, hsize_t *last_lnk, H5G_lib_iterate_t op, void *op_data);
 H5_DLL htri_t H5G__compact_lookup(const H5O_loc_t *grp_oloc, const char *name,
-    H5O_link_t *lnk, hid_t dxpl_id);
-H5_DLL herr_t H5G__compact_lookup_by_idx(const H5O_loc_t *oloc, hid_t dxpl_id,
+    H5O_link_t *lnk);
+H5_DLL herr_t H5G__compact_lookup_by_idx(const H5O_loc_t *oloc,
     const H5O_linfo_t *linfo, H5_index_t idx_type, H5_iter_order_t order,
     hsize_t n, H5O_link_t *lnk);
 #ifndef H5_NO_DEPRECATED_SYMBOLS
-H5_DLL H5G_obj_t H5G__compact_get_type_by_idx(H5O_loc_t *oloc, hid_t dxpl_id,
+H5_DLL H5G_obj_t H5G__compact_get_type_by_idx(H5O_loc_t *oloc, 
     const H5O_linfo_t *linfo, hsize_t idx);
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
 /* Functions that understand "dense" link storage */
-H5_DLL herr_t H5G__dense_build_table(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5_DLL herr_t H5G__dense_build_table(H5F_t *f, const H5O_linfo_t *linfo,
     H5_index_t idx_type, H5_iter_order_t order, H5G_link_table_t *ltable);
-H5_DLL herr_t H5G__dense_create(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
+H5_DLL herr_t H5G__dense_create(H5F_t *f, H5O_linfo_t *linfo,
     const H5O_pline_t *pline);
-H5_DLL herr_t H5G__dense_insert(H5F_t *f, hid_t dxpl_id,
-    const H5O_linfo_t *linfo, const H5O_link_t *lnk);
-H5_DLL htri_t H5G__dense_lookup(H5F_t *f, hid_t dxpl_id,
-    const H5O_linfo_t *linfo, const char *name, H5O_link_t *lnk);
-H5_DLL herr_t H5G__dense_lookup_by_idx(H5F_t *f, hid_t dxpl_id,
-    const H5O_linfo_t *linfo, H5_index_t idx_type, H5_iter_order_t order,
-    hsize_t n, H5O_link_t *lnk);
-H5_DLL herr_t H5G__dense_iterate(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5_DLL herr_t H5G__dense_insert(H5F_t *f, const H5O_linfo_t *linfo,
+    const H5O_link_t *lnk);
+H5_DLL htri_t H5G__dense_lookup(H5F_t *f, const H5O_linfo_t *linfo,
+    const char *name, H5O_link_t *lnk);
+H5_DLL herr_t H5G__dense_lookup_by_idx(H5F_t *f, const H5O_linfo_t *linfo,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, H5O_link_t *lnk);
+H5_DLL herr_t H5G__dense_iterate(H5F_t *f, const H5O_linfo_t *linfo,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
     H5G_lib_iterate_t op, void *op_data);
-H5_DLL ssize_t H5G__dense_get_name_by_idx(H5F_t  *f, hid_t dxpl_id,
-    H5O_linfo_t *linfo, H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
-    char *name, size_t size);
-H5_DLL herr_t H5G__dense_remove(H5F_t *f, hid_t dxpl_id, const H5O_linfo_t *linfo,
+H5_DLL ssize_t H5G__dense_get_name_by_idx(H5F_t  *f, H5O_linfo_t *linfo,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, char *name,
+    size_t size);
+H5_DLL herr_t H5G__dense_remove(H5F_t *f, const H5O_linfo_t *linfo,
     H5RS_str_t *grp_full_path_r, const char *name);
-H5_DLL herr_t H5G__dense_remove_by_idx(H5F_t *f, hid_t dxpl_id,
-    const H5O_linfo_t *linfo, H5RS_str_t *grp_full_path_r, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n);
-H5_DLL herr_t H5G__dense_delete(H5F_t *f, hid_t dxpl_id, H5O_linfo_t *linfo,
-    hbool_t adj_link);
+H5_DLL herr_t H5G__dense_remove_by_idx(H5F_t *f, const H5O_linfo_t *linfo,
+    H5RS_str_t *grp_full_path_r, H5_index_t idx_type, H5_iter_order_t order,
+    hsize_t n);
+H5_DLL herr_t H5G__dense_delete(H5F_t *f, H5O_linfo_t *linfo, hbool_t adj_link);
 #ifndef H5_NO_DEPRECATED_SYMBOLS
-H5_DLL H5G_obj_t H5G__dense_get_type_by_idx(H5F_t  *f, hid_t dxpl_id,
-    H5O_linfo_t *linfo, hsize_t idx);
+H5_DLL H5G_obj_t H5G__dense_get_type_by_idx(H5F_t  *f, H5O_linfo_t *linfo,
+    hsize_t idx);
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
 /* Functions that understand group objects */
-H5_DLL herr_t H5G__obj_create(H5F_t *f, hid_t dxpl_id,
-    H5G_obj_create_t *gcrt_info, H5O_loc_t *oloc/*out*/);
-H5_DLL herr_t H5G__obj_create_real(H5F_t *f, hid_t dxpl_id,
-    const H5O_ginfo_t *ginfo, const H5O_linfo_t *linfo,
-    const H5O_pline_t *pline, H5G_obj_create_t *gcrt_info,
+H5_DLL herr_t H5G__obj_create(H5F_t *f, H5G_obj_create_t *gcrt_info,
     H5O_loc_t *oloc/*out*/);
-H5_DLL htri_t H5G__obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo,
-    hid_t dxpl_id);
+H5_DLL herr_t H5G__obj_create_real(H5F_t *f, const H5O_ginfo_t *ginfo,
+    const H5O_linfo_t *linfo, const H5O_pline_t *pline, H5G_obj_create_t *gcrt_info,
+    H5O_loc_t *oloc/*out*/);
+H5_DLL htri_t H5G__obj_get_linfo(const H5O_loc_t *grp_oloc, H5O_linfo_t *linfo);
 H5_DLL herr_t H5G__obj_iterate(const H5O_loc_t *grp_oloc,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
-    H5G_lib_iterate_t op, void *op_data, hid_t dxpl_id);
-H5_DLL herr_t H5G__obj_info(H5O_loc_t *oloc, H5G_info_t *grp_info, hid_t dxpl_id);
+    H5G_lib_iterate_t op, void *op_data);
+H5_DLL herr_t H5G__obj_info(const H5O_loc_t *oloc, H5G_info_t *grp_info);
 H5_DLL htri_t H5G__obj_lookup(const H5O_loc_t *grp_oloc, const char *name,
-    H5O_link_t *lnk, hid_t dxpl_id);
+    H5O_link_t *lnk);
 
 /*
  * These functions operate on group hierarchy names.
@@ -514,7 +511,7 @@ H5_DLL herr_t H5G__name_init(H5G_name_t *name, const char *path);
  * These functions operate on group "locations"
  */
 H5_DLL herr_t H5G__loc_insert(H5G_loc_t *grp_loc, const char *name,
-    H5G_loc_t *obj_loc, H5O_type_t obj_type, const void *crt_info, hid_t dxpl_id);
+    H5G_loc_t *obj_loc, H5O_type_t obj_type, const void *crt_info);
 
 /* Testing functions */
 #ifdef H5G_TESTING
diff --git a/src/H5Gprivate.h b/src/H5Gprivate.h
index 2ef99fd..427f14b 100644
--- a/src/H5Gprivate.h
+++ b/src/H5Gprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -191,7 +189,7 @@ typedef struct H5G_entry_t H5G_entry_t;
 H5_DLL struct H5O_loc_t *H5G_oloc(H5G_t *grp);
 H5_DLL H5G_name_t * H5G_nameof(H5G_t *grp);
 H5_DLL H5F_t *H5G_fileof(H5G_t *grp);
-H5_DLL H5G_t *H5G_open(const H5G_loc_t *loc, hid_t dxpl_id);
+H5_DLL H5G_t *H5G_open(const H5G_loc_t *loc);
 H5_DLL herr_t H5G_close(H5G_t *grp);
 H5_DLL herr_t H5G_get_shared_count(H5G_t *grp);
 H5_DLL herr_t H5G_mount(H5G_t *grp);
@@ -210,14 +208,12 @@ H5_DLL char *H5G_normalize(const char *name);
  * Group hierarchy traversal routines
  */
 H5_DLL herr_t H5G_traverse(const H5G_loc_t *loc, const char *name,
-    unsigned target, H5G_traverse_t op, void *op_data, hid_t lapl_id,
-    hid_t dxpl_id);
+    unsigned target, H5G_traverse_t op, void *op_data);
 H5_DLL herr_t H5G_iterate(hid_t loc_id, const char *group_name,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t skip, hsize_t *last_lnk,
-    const H5G_link_iterate_t *lnk_op, void *op_data, hid_t lapl_id, hid_t dxpl_id);
+    const H5G_link_iterate_t *lnk_op, void *op_data);
 H5_DLL herr_t H5G_visit(hid_t loc_id, const char *group_name,
-    H5_index_t idx_type, H5_iter_order_t order, H5L_iterate_t op, void *op_data,
-    hid_t lapl_id, hid_t dxpl_id);
+    H5_index_t idx_type, H5_iter_order_t order, H5L_iterate_t op, void *op_data);
 
 /* 
  * Functions that understand links in groups
@@ -229,23 +225,23 @@ H5_DLL herr_t H5G_link_to_info(const struct H5O_link_t *lnk, H5L_info_t *linfo);
  */
 H5_DLL herr_t H5G_obj_insert(const struct H5O_loc_t *grp_oloc, const char *name,
     struct H5O_link_t *obj_lnk, hbool_t adj_link, H5O_type_t obj_type,
-    const void *crt_info, hid_t dxpl_id);
+    const void *crt_info);
 H5_DLL ssize_t H5G_obj_get_name_by_idx(const struct H5O_loc_t *oloc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, char* name, size_t size, hid_t dxpl_id);
+    H5_iter_order_t order, hsize_t n, char* name, size_t size);
 H5_DLL herr_t H5G_obj_remove(const struct H5O_loc_t *oloc, H5RS_str_t *grp_full_path_r,
-    const char *name, hid_t dxpl_id);
+    const char *name);
 H5_DLL herr_t H5G_obj_remove_by_idx(const struct H5O_loc_t *grp_oloc, H5RS_str_t *grp_full_path_r,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t dxpl_id);
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n);
 H5_DLL herr_t H5G_obj_lookup_by_idx(const struct H5O_loc_t *grp_oloc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, struct H5O_link_t *lnk, hid_t dxpl_id);
-H5_DLL hid_t H5G_get_create_plist(H5G_t *grp);
+    H5_iter_order_t order, hsize_t n, struct H5O_link_t *lnk);
+H5_DLL hid_t H5G_get_create_plist(const H5G_t *grp);
 
 /*
  * These functions operate on symbol table nodes.
  */
 H5_DLL herr_t H5G_node_close(const H5F_t *f);
-H5_DLL herr_t H5G_node_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
-			      int indent, int fwidth, haddr_t heap);
+H5_DLL herr_t H5G_node_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth, haddr_t heap);
 
 /*
  * These functions operate on group object locations.
@@ -259,14 +255,14 @@ H5_DLL herr_t H5G_ent_decode(const H5F_t *f, const uint8_t **pp, H5G_entry_t *en
 H5_DLL herr_t H5G_name_set(const H5G_name_t *loc, H5G_name_t *obj, const char *name);
 H5_DLL herr_t H5G_name_replace(const struct H5O_link_t *lnk, H5G_names_op_t op,
     H5F_t *src_file, H5RS_str_t *src_full_path_r, H5F_t *dst_file,
-    H5RS_str_t *dst_full_path_r, hid_t dxpl_id);
+    H5RS_str_t *dst_full_path_r);
 H5_DLL herr_t H5G_name_reset(H5G_name_t *name);
 H5_DLL herr_t H5G_name_copy(H5G_name_t *dst, const H5G_name_t *src, H5_copy_depth_t depth);
 H5_DLL herr_t H5G_name_free(H5G_name_t *name);
 H5_DLL ssize_t H5G_get_name(const H5G_loc_t *loc, char *name/*out*/, size_t size,
-    hbool_t *cached, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL ssize_t H5G_get_name_by_addr(hid_t fid, hid_t lapl_id, hid_t dxpl_id,
-    const struct H5O_loc_t *loc, char* name, size_t size);
+    hbool_t *cached);
+H5_DLL ssize_t H5G_get_name_by_addr(hid_t fid, const struct H5O_loc_t *loc,
+        char* name, size_t size);
 H5_DLL H5RS_str_t *H5G_build_fullpath_refstr_str(H5RS_str_t *path_r, const char *name);
 
 /*
@@ -275,26 +271,24 @@ H5_DLL H5RS_str_t *H5G_build_fullpath_refstr_str(H5RS_str_t *path_r, const char
 H5_DLL herr_t H5G_loc(hid_t loc_id, H5G_loc_t *loc);
 H5_DLL herr_t H5G_loc_copy(H5G_loc_t *dst, const H5G_loc_t *src, H5_copy_depth_t depth);
 H5_DLL herr_t H5G_loc_find(const H5G_loc_t *loc, const char *name,
-    H5G_loc_t *obj_loc/*out*/, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL herr_t H5G_loc_find_by_idx(H5G_loc_t *loc, const char *group_name,
+    H5G_loc_t *obj_loc/*out*/);
+H5_DLL herr_t H5G_loc_find_by_idx(const H5G_loc_t *loc, const char *group_name,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
-    H5G_loc_t *obj_loc/*out*/, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL htri_t H5G_loc_exists(const H5G_loc_t *loc, const char *name,
-    hid_t lapl_id, hid_t dxpl_id);
-H5_DLL herr_t H5G_loc_info(H5G_loc_t *loc, const char *name,
-    hbool_t want_ih_info, H5O_info_t *oinfo/*out*/, hid_t lapl_id,
-    hid_t dxpl_id);
-H5_DLL herr_t H5G_loc_set_comment(H5G_loc_t *loc, const char *name,
-    const char *comment, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL ssize_t H5G_loc_get_comment(H5G_loc_t *loc, const char *name,
-    char *comment/*out*/, size_t bufsize, hid_t lapl_id, hid_t dxpl_id);
+    H5G_loc_t *obj_loc/*out*/);
+H5_DLL htri_t H5G_loc_exists(const H5G_loc_t *loc, const char *name);
+H5_DLL herr_t H5G_loc_info(const H5G_loc_t *loc, const char *name,
+    hbool_t want_ih_info, H5O_info_t *oinfo/*out*/);
+H5_DLL herr_t H5G_loc_set_comment(const H5G_loc_t *loc, const char *name,
+    const char *comment);
+H5_DLL ssize_t H5G_loc_get_comment(const H5G_loc_t *loc, const char *name,
+    char *comment/*out*/, size_t bufsize);
 H5_DLL herr_t H5G_loc_reset(H5G_loc_t *loc);
 H5_DLL herr_t H5G_loc_free(H5G_loc_t *loc);
 
 /*
  * These functions operate on the root group
  */
-H5_DLL herr_t H5G_mkroot(H5F_t *f, hid_t dxpl_id, hbool_t create_root);
+H5_DLL herr_t H5G_mkroot(H5F_t *f, hbool_t create_root);
 H5_DLL herr_t H5G_root_loc(H5F_t *f, H5G_loc_t *loc);
 H5_DLL herr_t H5G_root_free(H5G_t *grp);
 H5_DLL H5G_t *H5G_rootof(H5F_t *f);
diff --git a/src/H5Gpublic.h b/src/H5Gpublic.h
index 9d8ade5..ab6f200 100644
--- a/src/H5Gpublic.h
+++ b/src/H5Gpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Groot.c b/src/H5Groot.c
index ba25f31..36aa8f6 100644
--- a/src/H5Groot.c
+++ b/src/H5Groot.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -145,7 +143,7 @@ H5G_rootof(H5F_t *f)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G_mkroot(H5F_t *f, hid_t dxpl_id, hbool_t create_root)
+H5G_mkroot(H5F_t *f, hbool_t create_root)
 {
     H5G_loc_t   root_loc;               /* Root location information */
     H5G_obj_create_t gcrt_info;         /* Root group object creation info */
@@ -194,13 +192,13 @@ H5G_mkroot(H5F_t *f, hid_t dxpl_id, hbool_t create_root)
         /* (Pass the FCPL which is a sub-class of the group creation property class) */
         gcrt_info.gcpl_id = f->shared->fcpl_id;
         gcrt_info.cache_type = H5G_NOTHING_CACHED;
-	if(H5G__obj_create(f, dxpl_id, &gcrt_info, root_loc.oloc/*out*/) < 0)
+	if(H5G__obj_create(f, &gcrt_info, root_loc.oloc/*out*/) < 0)
 	    HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create group entry")
-	if(1 != H5O_link(root_loc.oloc, 1, dxpl_id))
+	if(1 != H5O_link(root_loc.oloc, 1))
 	    HGOTO_ERROR(H5E_SYM, H5E_LINKCOUNT, FAIL, "internal error (wrong link count)")
 
         /* Decrement refcount on root group's object header in memory */
-        if(H5O_dec_rc_by_loc(root_loc.oloc, dxpl_id) < 0)
+        if(H5O_dec_rc_by_loc(root_loc.oloc) < 0)
            HGOTO_ERROR(H5E_SYM, H5E_CANTDEC, FAIL, "unable to decrement refcount on root group's object header")
 
         /* Mark superblock dirty, so root group info is flushed */
@@ -237,7 +235,7 @@ H5G_mkroot(H5F_t *f, hid_t dxpl_id, hbool_t create_root)
             /* Check for the situation where the symbol table is cached but does
              * not exist.  This can happen if, for example, an external link is
              * added to the root group. */
-            if((stab_exists = H5O_msg_exists(root_loc.oloc, H5O_STAB_ID, dxpl_id)) < 0)
+            if((stab_exists = H5O_msg_exists(root_loc.oloc, H5O_STAB_ID)) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check if symbol table message exists")
 
             /* Remove the cache if the stab does not exist */
@@ -255,7 +253,7 @@ H5G_mkroot(H5F_t *f, hid_t dxpl_id, hbool_t create_root)
 
                 /* Check if the symbol table message is valid, and replace with the
                 * cached symbol table if necessary */
-                if(H5G__stab_valid(root_loc.oloc, dxpl_id, &cached_stab) < 0)
+                if(H5G__stab_valid(root_loc.oloc, &cached_stab) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to verify symbol table")
             } /* end if */
 #endif /* H5_STRICT_FORMAT_CHECKS */
@@ -274,12 +272,12 @@ H5G_mkroot(H5F_t *f, hid_t dxpl_id, hbool_t create_root)
         /* Check if the stab message exists.  It's possible for the root group
          * to use the latest version while the superblock is an old version.
          * If stab_exists is not -1 then we have already checked. */
-        if(stab_exists == -1 && (stab_exists = H5O_msg_exists(root_loc.oloc, H5O_STAB_ID, dxpl_id)) < 0)
+        if(stab_exists == -1 && (stab_exists = H5O_msg_exists(root_loc.oloc, H5O_STAB_ID)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't check if symbol table message exists")
 
         if(stab_exists) {
             /* Read the root group's symbol table message */
-            if(NULL == H5O_msg_read(root_loc.oloc, H5O_STAB_ID, &stab, dxpl_id))
+            if(NULL == H5O_msg_read(root_loc.oloc, H5O_STAB_ID, &stab))
                 HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "unable to read symbol table message")
 
             /* Update the root group symbol table entry */
diff --git a/src/H5Gstab.c b/src/H5Gstab.c
index ed3dd84..64c4054 100644
--- a/src/H5Gstab.c
+++ b/src/H5Gstab.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer: Robb Matzke <matzke@llnl.gov>
@@ -71,7 +69,6 @@ typedef struct H5G_bt_it_gtbi_t {
     /* downward */
     H5G_bt_it_idx_common_t common; /* Common information for "by index" lookup  */
     H5F_t       *f;             /* Pointer to file that symbol table is in */
-    hid_t       dxpl_id;        /* DXPL for operation */
 
     /* upward */
     H5G_obj_t    type;          /*member type to be returned                 */
@@ -136,7 +133,7 @@ typedef struct H5G_bt_it_lbi_t {
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_create_components(H5F_t *f, H5O_stab_t *stab, size_t size_hint, hid_t dxpl_id)
+H5G__stab_create_components(H5F_t *f, H5O_stab_t *stab, size_t size_hint)
 {
     H5HL_t *heap = NULL;            /* Pointer to local heap */
     size_t name_offset;	            /* Offset of "" name */
@@ -152,19 +149,19 @@ H5G__stab_create_components(H5F_t *f, H5O_stab_t *stab, size_t size_hint, hid_t
     HDassert(size_hint > 0);
 
     /* Create the B-tree */
-    if(H5B_create(f, dxpl_id, H5B_SNODE, NULL, &(stab->btree_addr)/*out*/) < 0)
+    if(H5B_create(f, H5B_SNODE, NULL, &(stab->btree_addr)/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create B-tree")
 
     /* Create symbol table private heap */
-    if(H5HL_create(f, dxpl_id, size_hint, &(stab->heap_addr)/*out*/) < 0)
+    if(H5HL_create(f, size_hint, &(stab->heap_addr)/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create heap")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(f, dxpl_id, stab->heap_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HL_protect(f, stab->heap_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Insert name into the heap */
-    if(UFAIL == (name_offset = H5HL_insert(f, dxpl_id, heap, (size_t)1, "")))
+    if(UFAIL == (name_offset = H5HL_insert(f, heap, (size_t)1, "")))
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "can't insert name into heap")
 
     /*
@@ -203,14 +200,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_create(H5O_loc_t *grp_oloc, hid_t dxpl_id, const H5O_ginfo_t *ginfo,
-    H5O_stab_t *stab)
+H5G__stab_create(H5O_loc_t *grp_oloc, const H5O_ginfo_t *ginfo, H5O_stab_t *stab)
 {
     size_t      heap_hint;              /* Local heap size hint */
     size_t      size_hint;              /* Local heap size hint */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)
 
     /*
      * Check arguments.
@@ -228,18 +224,18 @@ H5G__stab_create(H5O_loc_t *grp_oloc, hid_t dxpl_id, const H5O_ginfo_t *ginfo,
     size_hint = MAX(heap_hint, H5HL_SIZEOF_FREE(grp_oloc->file) + 2);
 
     /* Go create the B-tree & local heap */
-    if(H5G__stab_create_components(grp_oloc->file, stab, size_hint, dxpl_id) < 0)
+    if(H5G__stab_create_components(grp_oloc->file, stab, size_hint) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create symbol table components")
 
     /*
      * Insert the symbol table message into the object header and the symbol
      * table entry.
      */
-    if(H5O_msg_create(grp_oloc, H5O_STAB_ID, 0, H5O_UPDATE_TIME, stab, dxpl_id) < 0)
+    if(H5O_msg_create(grp_oloc, H5O_STAB_ID, 0, H5O_UPDATE_TIME, stab) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "can't create message")
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__stab_create() */
 
 
@@ -260,8 +256,7 @@ done:
  */
 herr_t
 H5G__stab_insert_real(H5F_t *f, const H5O_stab_t *stab, const char *name,
-    H5O_link_t *obj_lnk, H5O_type_t obj_type, const void *crt_info,
-    hid_t dxpl_id)
+    H5O_link_t *obj_lnk, H5O_type_t obj_type, const void *crt_info)
 {
     H5HL_t       *heap = NULL;          /* Pointer to local heap */
     H5G_bt_ins_t udata;		        /* Data to pass through B-tree	*/
@@ -276,7 +271,7 @@ H5G__stab_insert_real(H5F_t *f, const H5O_stab_t *stab, const char *name,
     HDassert(obj_lnk);
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(f, dxpl_id, stab->heap_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HL_protect(f, stab->heap_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Initialize data to pass through B-tree */
@@ -287,7 +282,7 @@ H5G__stab_insert_real(H5F_t *f, const H5O_stab_t *stab, const char *name,
     udata.crt_info = crt_info;
 
     /* Insert into symbol table */
-    if(H5B_insert(f, dxpl_id, H5B_SNODE, stab->btree_addr, &udata) < 0)
+    if(H5B_insert(f, H5B_SNODE, stab->btree_addr, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert entry")
 
 done:
@@ -316,13 +311,12 @@ done:
  */
 herr_t
 H5G__stab_insert(const H5O_loc_t *grp_oloc, const char *name,
-    H5O_link_t *obj_lnk, H5O_type_t obj_type, const void *crt_info,
-    hid_t dxpl_id)
+    H5O_link_t *obj_lnk, H5O_type_t obj_type, const void *crt_info)
 {
     H5O_stab_t		stab;		/* Symbol table message		*/
     herr_t              ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)
 
     /* check arguments */
     HDassert(grp_oloc && grp_oloc->file);
@@ -330,15 +324,14 @@ H5G__stab_insert(const H5O_loc_t *grp_oloc, const char *name,
     HDassert(obj_lnk);
 
     /* Retrieve symbol table message */
-    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
         HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "not a symbol table")
 
-    if(H5G__stab_insert_real(grp_oloc->file, &stab, name, obj_lnk, obj_type,
-            crt_info, dxpl_id) < 0)
+    if(H5G__stab_insert_real(grp_oloc->file, &stab, name, obj_lnk, obj_type, crt_info) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5_ITER_ERROR, "unable to insert the name")
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, H5_ITER_ERROR)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__stab_insert() */
 
 
@@ -355,7 +348,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_remove(const H5O_loc_t *loc, hid_t dxpl_id, H5RS_str_t *grp_full_path_r,
+H5G__stab_remove(const H5O_loc_t *loc, H5RS_str_t *grp_full_path_r,
     const char *name)
 {
     H5HL_t      *heap = NULL;           /* Pointer to local heap */
@@ -369,11 +362,11 @@ H5G__stab_remove(const H5O_loc_t *loc, hid_t dxpl_id, H5RS_str_t *grp_full_path_
     HDassert(name && *name);
 
     /* Read in symbol table message */
-    if(NULL == H5O_msg_read(loc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(loc, H5O_STAB_ID, &stab))
         HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "not a symbol table")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(loc->file, dxpl_id, stab.heap_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HL_protect(loc->file, stab.heap_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Initialize data to pass through B-tree */
@@ -382,7 +375,7 @@ H5G__stab_remove(const H5O_loc_t *loc, hid_t dxpl_id, H5RS_str_t *grp_full_path_
     udata.grp_full_path_r = grp_full_path_r;
 
     /* Remove from symbol table */
-    if(H5B_remove(loc->file, dxpl_id, H5B_SNODE, stab.btree_addr, &udata) < 0)
+    if(H5B_remove(loc->file, H5B_SNODE, stab.btree_addr, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to remove entry")
 
 done:
@@ -407,7 +400,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_remove_by_idx(const H5O_loc_t *grp_oloc, hid_t dxpl_id, H5RS_str_t *grp_full_path_r,
+H5G__stab_remove_by_idx(const H5O_loc_t *grp_oloc, H5RS_str_t *grp_full_path_r,
     H5_iter_order_t order, hsize_t n)
 {
     H5HL_t      *heap = NULL;           /* Pointer to local heap */
@@ -422,16 +415,16 @@ H5G__stab_remove_by_idx(const H5O_loc_t *grp_oloc, hid_t dxpl_id, H5RS_str_t *gr
     HDassert(grp_oloc && grp_oloc->file);
 
     /* Look up name of link to remove, by index */
-    if(H5G__stab_lookup_by_idx(grp_oloc, order, n, &obj_lnk, dxpl_id) < 0)
+    if(H5G__stab_lookup_by_idx(grp_oloc, order, n, &obj_lnk) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get link information")
     lnk_copied = TRUE;
 
     /* Read in symbol table message */
-    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
         HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "not a symbol table")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, stab.heap_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Initialize data to pass through B-tree */
@@ -440,7 +433,7 @@ H5G__stab_remove_by_idx(const H5O_loc_t *grp_oloc, hid_t dxpl_id, H5RS_str_t *gr
     udata.grp_full_path_r = grp_full_path_r;
 
     /* Remove link from symbol table */
-    if(H5B_remove(grp_oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, &udata) < 0)
+    if(H5B_remove(grp_oloc->file, H5B_SNODE, stab.btree_addr, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to remove entry")
 
 done:
@@ -466,12 +459,10 @@ done:
  * Programmer:	Quincey Koziol
  *              Thursday, March 20, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_delete(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab)
+H5G__stab_delete(H5F_t *f, const H5O_stab_t *stab)
 {
     H5HL_t *heap = NULL;                /* Pointer to local heap */
     H5G_bt_rm_t	udata;		        /*data to pass through B-tree	*/
@@ -485,7 +476,7 @@ H5G__stab_delete(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab)
     HDassert(H5F_addr_defined(stab->heap_addr));
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(f, dxpl_id, stab->heap_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HL_protect(f, stab->heap_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Set up user data for B-tree deletion */
@@ -493,7 +484,7 @@ H5G__stab_delete(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab)
     udata.common.heap = heap;
 
     /* Delete entire B-tree */
-    if(H5B_delete(f, dxpl_id, H5B_SNODE, stab->btree_addr, &udata) < 0)
+    if(H5B_delete(f, H5B_SNODE, stab->btree_addr, &udata) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete symbol table B-tree")
 
     /* Release resources */
@@ -502,7 +493,7 @@ H5G__stab_delete(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab)
     heap = NULL;
 
     /* Delete local heap for names */
-    if(H5HL_delete(f, dxpl_id, stab->heap_addr) < 0)
+    if(H5HL_delete(f, stab->heap_addr) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to delete symbol table heap")
 
 done:
@@ -527,7 +518,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_iterate(const H5O_loc_t *oloc, hid_t dxpl_id, H5_iter_order_t order,
+H5G__stab_iterate(const H5O_loc_t *oloc, H5_iter_order_t order,
     hsize_t skip, hsize_t *last_lnk, H5G_lib_iterate_t op, void *op_data)
 {
     H5HL_t *heap = NULL;                        /* Local heap for group */
@@ -535,18 +526,18 @@ H5G__stab_iterate(const H5O_loc_t *oloc, hid_t dxpl_id, H5_iter_order_t order,
     H5G_link_table_t ltable = {0, NULL};        /* Link table */
     herr_t ret_value = FAIL;                    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(oloc->addr)
 
     /* Sanity check */
     HDassert(oloc);
     HDassert(op);
 
     /* Get the B-tree info */
-    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
 	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(oloc->file, dxpl_id, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Check on iteration order */
@@ -562,7 +553,7 @@ H5G__stab_iterate(const H5O_loc_t *oloc, hid_t dxpl_id, H5_iter_order_t order,
         udata.op_data = op_data;
 
         /* Iterate over the group members */
-        if((ret_value = H5B_iterate(oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_iterate, &udata)) < 0)
+        if((ret_value = H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_iterate, &udata)) < 0)
             HERROR(H5E_SYM, H5E_CANTNEXT, "iteration operator failed");
 
         /* Check for too high of a starting index (ex post facto :-) */
@@ -579,7 +570,7 @@ H5G__stab_iterate(const H5O_loc_t *oloc, hid_t dxpl_id, H5_iter_order_t order,
         udata.ltable = &ltable;
 
         /* Iterate over the group members */
-        if(H5B_iterate(oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_build_table, &udata) < 0)
+        if(H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_build_table, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to build link table")
 
         /* Check for skipping out of bounds */
@@ -602,7 +593,7 @@ done:
     if(ltable.lnks && H5G__link_release_table(&ltable) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTFREE, FAIL, "unable to release link table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__stab_iterate() */
 
 
@@ -619,12 +610,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_count(H5O_loc_t *oloc, hsize_t *num_objs, hid_t dxpl_id)
+H5G__stab_count(const H5O_loc_t *oloc, hsize_t *num_objs)
 {
     H5O_stab_t		stab;		        /* Info about symbol table */
     herr_t		ret_value = SUCCEED;
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(oloc->addr)
 
     /* Sanity check */
     HDassert(oloc);
@@ -634,15 +625,15 @@ H5G__stab_count(H5O_loc_t *oloc, hsize_t *num_objs, hid_t dxpl_id)
     *num_objs = 0;
 
     /* Get the B-tree info */
-    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
 	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")
 
     /* Iterate over the group members */
-    if(H5B_iterate(oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_sumup, num_objs) < 0)
+    if(H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_sumup, num_objs) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "iteration operator failed")
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__stab_count() */
 
 
@@ -659,8 +650,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_bh_size(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab,
-    H5_ih_info_t *bh_info)
+H5G__stab_bh_size(H5F_t *f, const H5O_stab_t *stab, H5_ih_info_t *bh_info)
 {
     hsize_t     snode_size;             /* Symbol table node size */
     H5B_info_t  bt_info;                /* B-tree node info */
@@ -677,14 +667,14 @@ H5G__stab_bh_size(H5F_t *f, hid_t dxpl_id, const H5O_stab_t *stab,
     snode_size = 0;
 
     /* Get the B-tree & symbol table node size info */
-    if(H5B_get_info(f, dxpl_id, H5B_SNODE, stab->btree_addr, &bt_info, H5G__node_iterate_size, &snode_size) < 0)
+    if(H5B_get_info(f, H5B_SNODE, stab->btree_addr, &bt_info, H5G__node_iterate_size, &snode_size) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTINIT, FAIL, "iteration operator failed")
 
     /* Add symbol table & B-tree node sizes to index info */
     bh_info->index_size += snode_size + bt_info.size;
 
     /* Get the size of the local heap for the group */
-    if(H5HL_heapsize(f, dxpl_id, stab->heap_addr, &(bh_info->heap_size)) < 0)
+    if(H5HL_heapsize(f, stab->heap_addr, &(bh_info->heap_size)) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "iteration operator failed")
 
 done:
@@ -709,11 +699,12 @@ done:
 static herr_t
 H5G_stab_get_name_by_idx_cb(const H5G_entry_t *ent, void *_udata)
 {
-    H5G_bt_it_gnbi_t	*udata = (H5G_bt_it_gnbi_t *)_udata;
+    H5G_bt_it_gnbi_t    *udata = (H5G_bt_it_gnbi_t *)_udata;
     size_t name_off;                    /* Offset of name in heap */
     const char *name;                   /* Pointer to name string in heap */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_NOAPI_NOINIT
 
     /* Sanity check */
     HDassert(ent);
@@ -721,12 +712,15 @@ H5G_stab_get_name_by_idx_cb(const H5G_entry_t *ent, void *_udata)
 
     /* Get name offset in heap */
     name_off = ent->name_off;
-    name = (const char *)H5HL_offset_into(udata->heap, name_off);
-    HDassert(name);
-    udata->name = H5MM_strdup(name);
-    HDassert(udata->name);
 
-    FUNC_LEAVE_NOAPI(SUCCEED)
+    if((name = (const char *)H5HL_offset_into(udata->heap, name_off)) == NULL)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get symbol table link name")
+
+    if((udata->name = H5MM_strdup(name)) == NULL)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to duplicate symbol table link name")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5G_stab_get_name_by_idx_cb */
 
 
@@ -745,7 +739,7 @@ H5G_stab_get_name_by_idx_cb(const H5G_entry_t *ent, void *_udata)
  */
 ssize_t
 H5G__stab_get_name_by_idx(const H5O_loc_t *oloc, H5_iter_order_t order, hsize_t n,
-    char* name, size_t size, hid_t dxpl_id)
+    char* name, size_t size)
 {
     H5HL_t *heap = NULL;        /* Pointer to local heap */
     H5O_stab_t	stab;	        /* Info about local heap & B-tree */
@@ -762,11 +756,11 @@ H5G__stab_get_name_by_idx(const H5O_loc_t *oloc, H5_iter_order_t order, hsize_t
     HDassert(oloc);
 
     /* Get the B-tree & local heap info */
-    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
 	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(oloc->file, dxpl_id, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Remap index for decreasing iteration order */
@@ -774,7 +768,7 @@ H5G__stab_get_name_by_idx(const H5O_loc_t *oloc, H5_iter_order_t order, hsize_t
         hsize_t nlinks = 0;           /* Number of links in group */
 
         /* Iterate over the symbol table nodes, to count the links */
-        if(H5B_iterate(oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_sumup, &nlinks) < 0)
+        if(H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_sumup, &nlinks) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "iteration operator failed")
 
         /* Map decreasing iteration order index to increasing iteration order index */
@@ -790,7 +784,7 @@ H5G__stab_get_name_by_idx(const H5O_loc_t *oloc, H5_iter_order_t order, hsize_t
     udata_valid = TRUE;
 
     /* Iterate over the group members */
-    if(H5B_iterate(oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
+    if(H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "iteration operator failed")
 
     /* If we don't know the name now, we almost certainly went out of bounds */
@@ -867,8 +861,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5G__stab_lookup(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk,
-    hid_t dxpl_id)
+H5G__stab_lookup(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk)
 {
     H5HL_t *heap = NULL;                /* Pointer to local heap */
     H5G_bt_lkp_t bt_udata;              /* Data to pass through B-tree	*/
@@ -884,11 +877,11 @@ H5G__stab_lookup(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk,
     HDassert(lnk);
 
     /* Retrieve the symbol table message for the group */
-    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
         HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't read message")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Set up user data to pass to 'find' operation callback */
@@ -903,7 +896,7 @@ H5G__stab_lookup(const H5O_loc_t *grp_oloc, const char *name, H5O_link_t *lnk,
     bt_udata.op_data = &udata;
 
     /* Search the B-tree */
-    if((ret_value = H5B_find(grp_oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, &bt_udata)) < 0)
+    if((ret_value = H5B_find(grp_oloc->file, H5B_SNODE, stab.btree_addr, &bt_udata)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "not found")
 
 done:
@@ -943,8 +936,8 @@ H5G_stab_lookup_by_idx_cb(const H5G_entry_t *ent, void *_udata)
     HDassert(udata && udata->heap);
 
     /* Get a pointer to the link name */
-    name = (const char *)H5HL_offset_into(udata->heap, ent->name_off);
-    HDassert(name);
+    if((name = (const char *)H5HL_offset_into(udata->heap, ent->name_off)) == NULL)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to get symbol table link name")
 
     /* Convert the entry to a link */
     if(H5G__ent_to_link(udata->lnk, udata->heap, ent, name) < 0)
@@ -971,7 +964,7 @@ done:
  */
 herr_t
 H5G__stab_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_iter_order_t order, hsize_t n,
-    H5O_link_t *lnk, hid_t dxpl_id)
+    H5O_link_t *lnk)
 {
     H5HL_t *heap = NULL;                /* Pointer to local heap */
     H5G_bt_it_lbi_t udata;              /* Iteration information */
@@ -985,11 +978,11 @@ H5G__stab_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_iter_order_t order, hsize_
     HDassert(lnk);
 
     /* Get the B-tree & local heap info */
-    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
 	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to determine local heap address")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to protect symbol table heap")
 
     /* Remap index for decreasing iteration order */
@@ -997,7 +990,7 @@ H5G__stab_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_iter_order_t order, hsize_
         hsize_t nlinks = 0;           /* Number of links in group */
 
         /* Iterate over the symbol table nodes, to count the links */
-        if(H5B_iterate(grp_oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_sumup, &nlinks) < 0)
+        if(H5B_iterate(grp_oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_sumup, &nlinks) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "iteration operator failed")
 
         /* Map decreasing iteration order index to increasing iteration order index */
@@ -1013,7 +1006,7 @@ H5G__stab_lookup_by_idx(const H5O_loc_t *grp_oloc, H5_iter_order_t order, hsize_
     udata.found = FALSE;
 
     /* Iterate over the group members */
-    if(H5B_iterate(grp_oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
+    if(H5B_iterate(grp_oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "iteration operator failed")
 
     /* If we didn't find the link, we almost certainly went out of bounds */
@@ -1053,24 +1046,24 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5G__stab_valid(H5O_loc_t *grp_oloc, hid_t dxpl_id, H5O_stab_t *alt_stab)
+H5G__stab_valid(H5O_loc_t *grp_oloc, H5O_stab_t *alt_stab)
 {
     H5O_stab_t  stab;                   /* Current symbol table */
     H5HL_t      *heap = NULL;           /* Pointer to local heap */
     hbool_t     changed = FALSE;        /* Whether stab has been modified */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)
 
     /* Read the symbol table message */
-    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
         HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "unable to read symbol table message");
 
     /* Check if the symbol table message's b-tree address is valid */
-    if(H5B_valid(grp_oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr) < 0) {
+    if(H5B_valid(grp_oloc->file, H5B_SNODE, stab.btree_addr) < 0) {
         /* Address is invalid, try the b-tree address in the alternate symbol
          * table message */
-        if(!alt_stab || H5B_valid(grp_oloc->file, dxpl_id, H5B_SNODE, alt_stab->btree_addr) < 0)
+        if(!alt_stab || H5B_valid(grp_oloc->file, H5B_SNODE, alt_stab->btree_addr) < 0)
             HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "unable to locate b-tree")
         else {
             /* The alternate symbol table's b-tree address is valid.  Adjust the
@@ -1081,10 +1074,10 @@ H5G__stab_valid(H5O_loc_t *grp_oloc, hid_t dxpl_id, H5O_stab_t *alt_stab)
     } /* end if */
 
     /* Check if the symbol table message's heap address is valid */
-    if(NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, stab.heap_addr, H5AC__READ_ONLY_FLAG))) {
+    if(NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG))) {
         /* Address is invalid, try the heap address in the alternate symbol
          * table message */
-        if(!alt_stab || NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, alt_stab->heap_addr, H5AC__READ_ONLY_FLAG)))
+        if(!alt_stab || NULL == (heap = H5HL_protect(grp_oloc->file, alt_stab->heap_addr, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "unable to locate heap")
         else {
             /* The alternate symbol table's heap address is valid.  Adjust the
@@ -1097,7 +1090,7 @@ H5G__stab_valid(H5O_loc_t *grp_oloc, hid_t dxpl_id, H5O_stab_t *alt_stab)
     /* Update the symbol table message and clear errors if necessary */
     if(changed) {
         H5E_clear_stack(NULL);
-        if(H5O_msg_write(grp_oloc, H5O_STAB_ID, 0, H5O_UPDATE_TIME | H5O_UPDATE_FORCE, &stab, dxpl_id) < 0)
+        if(H5O_msg_write(grp_oloc, H5O_STAB_ID, 0, H5O_UPDATE_TIME | H5O_UPDATE_FORCE, &stab) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to correct symbol table message")
     } /* end if */
 
@@ -1106,7 +1099,7 @@ done:
     if(heap && H5HL_unprotect(heap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__stab_valid */
 #endif /* H5_STRICT_FORMAT_CHECKS */
 
@@ -1159,7 +1152,7 @@ H5G_stab_get_type_by_idx_cb(const H5G_entry_t *ent, void *_udata)
                 tmp_oloc.addr = ent->header;
 
                 /* Get the type of the object */
-                if(H5O_obj_type(&tmp_oloc, &obj_type, udata->dxpl_id) < 0)
+                if(H5O_obj_type(&tmp_oloc, &obj_type) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't get object type")
                 udata->type = H5G_map_obj_type(obj_type);
             }
@@ -1187,19 +1180,19 @@ done:
  *-------------------------------------------------------------------------
  */
 H5G_obj_t
-H5G__stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx, hid_t dxpl_id)
+H5G__stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx)
 {
     H5O_stab_t		stab;	        /* Info about local heap & B-tree */
     H5G_bt_it_gtbi_t	udata;          /* User data for B-tree callback */
     H5G_obj_t		ret_value = H5G_UNKNOWN;        /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, oloc->addr, H5G_UNKNOWN)
+    FUNC_ENTER_PACKAGE_TAG(oloc->addr)
 
     /* Sanity check */
     HDassert(oloc);
 
     /* Get the B-tree & local heap info */
-    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(oloc, H5O_STAB_ID, &stab))
 	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5G_UNKNOWN, "unable to determine local heap address")
 
     /* Set iteration information */
@@ -1207,11 +1200,10 @@ H5G__stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx, hid_t dxpl_id)
     udata.common.num_objs = 0;
     udata.common.op = H5G_stab_get_type_by_idx_cb;
     udata.f = oloc->file;
-    udata.dxpl_id = dxpl_id;
     udata.type = H5G_UNKNOWN;
 
     /* Iterate over the group members */
-    if(H5B_iterate(oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
+    if(H5B_iterate(oloc->file, H5B_SNODE, stab.btree_addr, H5G__node_by_idx, &udata) < 0)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "iteration operator failed")
 
     /* If we don't know the type now, we almost certainly went out of bounds */
@@ -1222,7 +1214,7 @@ H5G__stab_get_type_by_idx(H5O_loc_t *oloc, hsize_t idx, hid_t dxpl_id)
     ret_value = udata.type;
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, H5G_UNKNOWN)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__stab_get_type_by_idx() */
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
diff --git a/src/H5Gtest.c b/src/H5Gtest.c
index 0e0a897..f2f3e3a 100644
--- a/src/H5Gtest.c
+++ b/src/H5Gtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
@@ -31,6 +29,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"		/* Datasets				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Gpkg.h"		/* Groups		  		*/
@@ -97,7 +96,7 @@ H5G__is_empty_test(hid_t gid)
     H5G_t *grp = NULL;          /* Pointer to group */
     htri_t msg_exists = FALSE;  /* Indicate that a header message is present */
     htri_t linfo_exists = FALSE;/* Indicate that the 'link info' message is present */
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     htri_t ret_value = TRUE;    /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -106,14 +105,19 @@ H5G__is_empty_test(hid_t gid)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(gid, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* "New format" checks */
 
     /* Check if the group has any link messages */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists > 0) {
         /* Sanity check that new group format shouldn't have old messages */
-        if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID, dxpl_id)) < 0)
+        if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
         if(msg_exists > 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "both symbol table and link messages found")
@@ -122,19 +126,19 @@ H5G__is_empty_test(hid_t gid)
     } /* end if */
 
     /* Check for a link info message */
-    if((linfo_exists = H5O_msg_exists(&(grp->oloc), H5O_LINFO_ID, dxpl_id)) < 0)
+    if((linfo_exists = H5O_msg_exists(&(grp->oloc), H5O_LINFO_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(linfo_exists > 0) {
         H5O_linfo_t linfo;		/* Link info message */
 
         /* Sanity check that new group format shouldn't have old messages */
-        if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID, dxpl_id)) < 0)
+        if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
         if(msg_exists > 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "both symbol table and link info messages found")
 
         /* Get the link info */
-        if(H5G__obj_get_linfo(&(grp->oloc), &linfo, dxpl_id) < 0)
+        if(H5G__obj_get_linfo(&(grp->oloc), &linfo) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get link info")
 
         /* Check for 'dense' link storage file addresses being defined */
@@ -153,7 +157,7 @@ H5G__is_empty_test(hid_t gid)
     /* "Old format" checks */
 
     /* Check if the group has a symbol table message */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists > 0) {
         H5O_stab_t stab;        /* Info about local heap & B-tree */
@@ -162,17 +166,17 @@ H5G__is_empty_test(hid_t gid)
         /* Sanity check that old group format shouldn't have new messages */
         if(linfo_exists > 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "both symbol table and link info messages found")
-        if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_GINFO_ID, dxpl_id)) < 0)
+        if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_GINFO_ID)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
         if(msg_exists > 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "both symbol table and group info messages found")
 
         /* Get the B-tree & local heap info */
-        if(NULL == H5O_msg_read(&(grp->oloc), H5O_STAB_ID, &stab, dxpl_id))
+        if(NULL == H5O_msg_read(&(grp->oloc), H5O_STAB_ID, &stab))
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to read symbol table message")
 
         /* Get the count of links in the group */
-        if(H5G__stab_count(&(grp->oloc), &nlinks, dxpl_id) < 0)
+        if(H5G__stab_count(&(grp->oloc), &nlinks) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to count links")
 
         /* Check for link count */
@@ -181,6 +185,9 @@ H5G__is_empty_test(hid_t gid)
     } /* end if */
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5G__is_empty_test() */
 
@@ -209,7 +216,7 @@ H5G__has_links_test(hid_t gid, unsigned *nmsgs)
 {
     H5G_t *grp = NULL;          /* Pointer to group */
     htri_t msg_exists = 0;      /* Indicate that a header message is present */
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     htri_t ret_value = TRUE;    /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -218,14 +225,19 @@ H5G__has_links_test(hid_t gid, unsigned *nmsgs)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(gid, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Check if the group has any link messages */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists == 0)
         HGOTO_DONE(FALSE)
 
     /* Check if the group has a symbol table message */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists > 0)
 	HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "both symbol table and link messages found")
@@ -235,12 +247,15 @@ H5G__has_links_test(hid_t gid, unsigned *nmsgs)
         int msg_count;     /* Number of messages of a type */
 
         /* Check how many link messages there are */
-        if((msg_count = H5O_msg_count(&(grp->oloc), H5O_LINK_ID, dxpl_id)) < 0)
+        if((msg_count = H5O_msg_count(&(grp->oloc), H5O_LINK_ID)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTCOUNT, FAIL, "unable to count link messages")
         *nmsgs = (unsigned)msg_count;
     } /* end if */
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5G__has_links_test() */
 
@@ -268,7 +283,7 @@ H5G__has_stab_test(hid_t gid)
 {
     H5G_t *grp = NULL;          /* Pointer to group */
     htri_t msg_exists = 0;      /* Indicate that a header message is present */
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     htri_t ret_value = TRUE;    /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -277,19 +292,27 @@ H5G__has_stab_test(hid_t gid)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(gid, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Check if the group has a symbol table message */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists == 0)
         HGOTO_DONE(FALSE)
 
     /* Check if the group has any link messages */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists > 0)
 	HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "both symbol table and link messages found")
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5G__has_stab_test() */
 
@@ -319,7 +342,7 @@ H5G__is_new_dense_test(hid_t gid)
 {
     H5G_t *grp = NULL;          /* Pointer to group */
     htri_t msg_exists = 0;      /* Indicate that a header message is present */
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     htri_t ret_value = TRUE;    /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -328,26 +351,31 @@ H5G__is_new_dense_test(hid_t gid)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(gid, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Check if the group has a symbol table message */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists > 0)
         HGOTO_DONE(FALSE)
 
     /* Check if the group has any link messages */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINK_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists > 0)
         HGOTO_DONE(FALSE)
 
     /* Check if the group has link info message */
-    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINFO_ID, dxpl_id)) < 0)
+    if((msg_exists = H5O_msg_exists(&(grp->oloc), H5O_LINFO_ID)) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
     if(msg_exists > 0) {
         H5O_linfo_t linfo;		/* Link info message */
 
         /* Get the link info */
-        if(H5G__obj_get_linfo(&(grp->oloc), &linfo, dxpl_id) < 0)
+        if(H5G__obj_get_linfo(&(grp->oloc), &linfo) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get link info")
 
         /* Check for 'dense' link storage file addresses being defined */
@@ -358,6 +386,9 @@ H5G__is_new_dense_test(hid_t gid)
     } /* end if */
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5G__is_new_dense_test() */
 
@@ -390,7 +421,7 @@ H5G__new_dense_info_test(hid_t gid, hsize_t *name_count, hsize_t *corder_count)
     H5B2_t *bt2_corder = NULL;  /* v2 B-tree handle for creation order index */
     H5O_linfo_t linfo;		/* Link info message */
     H5G_t *grp = NULL;          /* Pointer to group */
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -399,21 +430,26 @@ H5G__new_dense_info_test(hid_t gid, hsize_t *name_count, hsize_t *corder_count)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(gid, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
-    /* Set metadata tag in dxpl_id */
-    H5_BEGIN_TAG(dxpl_id, grp->oloc.addr, FAIL);
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
+    /* Set metadata tag in API context */
+    H5_BEGIN_TAG(grp->oloc.addr);
 
     /* Get the link info */
-    if(H5G__obj_get_linfo(&(grp->oloc), &linfo, dxpl_id) < 0)
+    if(H5G__obj_get_linfo(&(grp->oloc), &linfo) < 0)
         HGOTO_ERROR_TAG(H5E_SYM, H5E_BADMESG, FAIL, "can't get link info")
 
     /* Check for 'dense' link storage file addresses being defined */
     if(!H5F_addr_defined(linfo.fheap_addr))
-        HGOTO_DONE_TAG(FAIL, FAIL)
+        HGOTO_DONE_TAG(FAIL)
     if(!H5F_addr_defined(linfo.name_bt2_addr))
-        HGOTO_DONE_TAG(FAIL, FAIL)
+        HGOTO_DONE_TAG(FAIL)
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(grp->oloc.file, dxpl_id, linfo.name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(grp->oloc.file, linfo.name_bt2_addr, NULL)))
         HGOTO_ERROR_TAG(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Retrieve # of records in name index */
@@ -423,7 +459,7 @@ H5G__new_dense_info_test(hid_t gid, hsize_t *name_count, hsize_t *corder_count)
     /* Check if there is a creation order index */
     if(H5F_addr_defined(linfo.corder_bt2_addr)) {
         /* Open the creation order index v2 B-tree */
-        if(NULL == (bt2_corder = H5B2_open(grp->oloc.file, dxpl_id, linfo.corder_bt2_addr, NULL)))
+        if(NULL == (bt2_corder = H5B2_open(grp->oloc.file, linfo.corder_bt2_addr, NULL)))
             HGOTO_ERROR_TAG(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
         /* Retrieve # of records in creation order index */
@@ -433,15 +469,17 @@ H5G__new_dense_info_test(hid_t gid, hsize_t *name_count, hsize_t *corder_count)
     else
         *corder_count = 0;
 
-    /* Reset metadata tag in dxpl_id */
-    H5_END_TAG(FAIL);
+    /* Reset metadata tag in API context */
+    H5_END_TAG
 
 done:
     /* Release resources */
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for creation order index")
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
 
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5G__new_dense_info_test() */
@@ -471,7 +509,7 @@ H5G__lheap_size_test(hid_t gid, size_t *lheap_size)
 {
     H5G_t *grp = NULL;          /* Pointer to group */
     H5O_stab_t stab;		/* Symbol table message	*/
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -480,15 +518,23 @@ H5G__lheap_size_test(hid_t gid, size_t *lheap_size)
     if(NULL == (grp = (H5G_t *)H5I_object_verify(gid, H5I_GROUP)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Make certain the group has a symbol table message */
-    if(NULL == H5O_msg_read(&(grp->oloc), H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(&(grp->oloc), H5O_STAB_ID, &stab))
 	HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read symbol table message")
 
     /* Check the size of the local heap for the group */
-    if(H5HL_get_size(grp->oloc.file, dxpl_id, stab.heap_addr, lheap_size) < 0)
+    if(H5HL_get_size(grp->oloc.file, stab.heap_addr, lheap_size) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTGETSIZE, FAIL, "can't query local heap size")
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5G__lheap_size_test() */
 
@@ -520,6 +566,7 @@ H5G__user_path_test(hid_t obj_id, char *user_path, size_t *user_path_len, unsign
 {
     void *obj_ptr;              /* Pointer to object for ID */
     H5G_name_t *obj_path;       /* Pointer to group hier. path for obj */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -532,6 +579,11 @@ H5G__user_path_test(hid_t obj_id, char *user_path, size_t *user_path_len, unsign
     if(NULL == (obj_ptr = H5I_object(obj_id)))
          HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get object for ID")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Get the symbol table entry */
     switch(H5I_get_type(obj_id)) {
         case H5I_GROUP:
@@ -588,6 +640,9 @@ H5G__user_path_test(hid_t obj_id, char *user_path, size_t *user_path_len, unsign
     } /* end else */
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5G__user_path_test() */
 
@@ -613,17 +668,16 @@ H5G__verify_cached_stab_test(H5O_loc_t *grp_oloc, H5G_entry_t *ent)
 {
     H5O_stab_t  stab;                   /* Symbol table */
     H5HL_t      *heap = NULL;           /* Pointer to local heap */
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
     herr_t	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_PACKAGE_TAG(dxpl_id, grp_oloc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(grp_oloc->addr)
 
     /* Verify that stab info is cached in ent */
     if(ent->type != H5G_CACHED_STAB)
         HGOTO_ERROR(H5E_SYM, H5E_BADTYPE, FAIL, "symbol table information is not cached")
 
     /* Read the symbol table message from the group */
-    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab))
         HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "unable to read symbol table message")
 
     /* Verify that the cached symbol table info matches the symbol table message
@@ -633,11 +687,11 @@ H5G__verify_cached_stab_test(H5O_loc_t *grp_oloc, H5G_entry_t *ent)
         HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "cached stab info does not match object header")
 
     /* Verify that the btree address is valid */
-    if(H5B_valid(grp_oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr) < 0)
+    if(H5B_valid(grp_oloc->file, H5B_SNODE, stab.btree_addr) < 0)
         HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "b-tree address is invalid")
 
     /* Verify that the heap address is valid */
-    if(NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(grp_oloc->file, stab.heap_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "heap address is invalid")
 
 done:
@@ -645,12 +699,12 @@ done:
     if(heap && H5HL_unprotect(heap) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5G__verify_cached_stab_test() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5G_verify_cached_stabs_test_cb
+ * Function:    H5G__verify_cached_stabs_test_cb
  *
  * Purpose:     Verify that all entries in this node contain cached symbol
  *              table information if and only if the entry refers to a
@@ -665,9 +719,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static int
-H5G_verify_cached_stabs_test_cb(H5F_t *f, hid_t dxpl_id,
-    const void H5_ATTR_UNUSED *_lt_key, haddr_t addr, const void H5_ATTR_UNUSED *_rt_key,
-    void H5_ATTR_UNUSED *udata)
+H5G__verify_cached_stabs_test_cb(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key,
+    haddr_t addr, const void H5_ATTR_UNUSED *_rt_key, void H5_ATTR_UNUSED *udata)
 {
     H5G_node_t          *sn = NULL;
     H5O_loc_t           targ_oloc;
@@ -677,7 +730,7 @@ H5G_verify_cached_stabs_test_cb(H5F_t *f, hid_t dxpl_id,
     unsigned            i;
     int                 ret_value = H5_ITER_CONT;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -686,7 +739,7 @@ H5G_verify_cached_stabs_test_cb(H5F_t *f, hid_t dxpl_id,
     HDassert(H5F_addr_defined(addr));
 
     /* Load the node */
-    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, dxpl_id, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (sn = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, addr, f, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5_ITER_ERROR, "unable to load symbol table node")
 
     /* Check each target object to see if its stab message (if present) matches
@@ -701,7 +754,7 @@ H5G_verify_cached_stabs_test_cb(H5F_t *f, hid_t dxpl_id,
         targ_oloc.addr = sn->entry[i].header;
 
         /* Load target object header */
-        if(NULL == (targ_oh = H5O_protect(&targ_oloc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+        if(NULL == (targ_oh = H5O_protect(&targ_oloc, H5AC__READ_ONLY_FLAG, FALSE)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTPROTECT, H5_ITER_ERROR, "unable to protect target object header")
 
         /* Check if a symbol table message exists */
@@ -710,7 +763,7 @@ H5G_verify_cached_stabs_test_cb(H5F_t *f, hid_t dxpl_id,
 
         if(stab_exists) {
             /* Read symbol table message */
-            if(NULL == H5O_msg_read_oh(f, dxpl_id, targ_oh, H5O_STAB_ID, &stab))
+            if(NULL == H5O_msg_read_oh(f, targ_oh, H5O_STAB_ID, &stab))
                 HGOTO_ERROR(H5E_SYM, H5E_CANTGET, H5_ITER_ERROR, "unable to read STAB message")
 
             /* Check if the stab matches the cached stab info */
@@ -725,23 +778,23 @@ H5G_verify_cached_stabs_test_cb(H5F_t *f, hid_t dxpl_id,
             HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, H5_ITER_ERROR, "nonexistent STAB message is cached")
 
         /* Unprotect target object */
-        if(H5O_unprotect(&targ_oloc, dxpl_id, targ_oh, H5AC__NO_FLAGS_SET) < 0)
+        if(H5O_unprotect(&targ_oloc, targ_oh, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTUNPROTECT, H5_ITER_ERROR, "unable to release object header");
         targ_oh = NULL;
     } /* end for */
 
 done:
-    if(sn && H5AC_unprotect(f, dxpl_id, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
+    if(sn && H5AC_unprotect(f, H5AC_SNODE, addr, sn, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_SYM, H5E_PROTECT, H5_ITER_ERROR, "unable to release object header")
 
     if(targ_oh) {
         HDassert(ret_value == H5_ITER_ERROR);
-        if(H5O_unprotect(&targ_oloc, dxpl_id, targ_oh, H5AC__NO_FLAGS_SET) < 0)
+        if(H5O_unprotect(&targ_oloc, targ_oh, H5AC__NO_FLAGS_SET) < 0)
             HDONE_ERROR(H5E_SYM, H5E_CANTUNPROTECT, H5_ITER_ERROR, "unable to release object header");
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_verify_cached_stabs_test_cb() */
+} /* end H5G__verify_cached_stabs_test_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -770,7 +823,6 @@ H5G__verify_cached_stabs_test(hid_t gid)
     H5O_stab_t          stab;                   /* Symbol table message */
     H5G_bt_common_t     udata = {NULL, NULL};   /* Dummy udata so H5B_iterate doesn't freak out */
     haddr_t             prev_tag = HADDR_UNDEF; /* Previous metadata tag */
-    hid_t               dxpl_id = H5AC_ind_read_dxpl_id;  /* transfer property list used for this operation */
     herr_t              ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -783,13 +835,11 @@ H5G__verify_cached_stabs_test(hid_t gid)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a group")
 
     /* Set up metadata tagging */
-    if(H5AC_tag(dxpl_id, grp->oloc.addr, &prev_tag) < 0)
-        HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, FAIL, "unable to apply metadata tag")
+    H5AC_tag(grp->oloc.addr, &prev_tag);
 
     /* Check for group having a symbol table message */
     /* Check for the group having a group info message */
-    if((stab_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID,
-            dxpl_id)) < 0)
+    if((stab_exists = H5O_msg_exists(&(grp->oloc), H5O_STAB_ID)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to read object header")
 
     /* No need to check anything if the symbol table doesn't exist */
@@ -797,17 +847,16 @@ H5G__verify_cached_stabs_test(hid_t gid)
         HGOTO_DONE(SUCCEED);
 
     /* Read the stab */
-    if(NULL == H5O_msg_read(&(grp->oloc), H5O_STAB_ID, &stab, dxpl_id))
+    if(NULL == H5O_msg_read(&(grp->oloc), H5O_STAB_ID, &stab))
         HGOTO_ERROR(H5E_SYM, H5E_BADMESG, FAIL, "can't get symbol table info")
 
     /* Iterate over the b-tree, checking validity of cached information */
-    if((ret_value = H5B_iterate(grp->oloc.file, dxpl_id, H5B_SNODE,
-            stab.btree_addr, H5G_verify_cached_stabs_test_cb, &udata)) < 0)
+    if((ret_value = H5B_iterate(grp->oloc.file, H5B_SNODE, stab.btree_addr,
+            H5G__verify_cached_stabs_test_cb, &udata)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "iteration operator failed");
 
     /* Reset metadata tagging */
-    if(H5AC_tag(dxpl_id, prev_tag, NULL) < 0)
-        HDONE_ERROR(H5E_CACHE, H5E_CANTTAG, FAIL, "unable to apply metadata tag")
+    H5AC_tag(prev_tag, NULL);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Gtraverse.c b/src/H5Gtraverse.c
index d6c90e4..37b6292 100644
--- a/src/H5Gtraverse.c
+++ b/src/H5Gtraverse.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -35,6 +33,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"         /* Datasets                             */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Fprivate.h"		/* File access				*/
@@ -75,18 +74,15 @@ typedef struct {
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5G_traverse_slink_cb(H5G_loc_t *grp_loc, const char *name,
+static herr_t H5G__traverse_slink_cb(H5G_loc_t *grp_loc, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5G_traverse_ud(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
-    H5G_loc_t *obj_loc/*in,out*/, unsigned target, size_t *nlinks/*in,out*/,
-    hbool_t *obj_exists, hid_t lapl_id, hid_t dxpl_id);
-static herr_t H5G_traverse_slink(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
-    H5G_loc_t *obj_loc/*in,out*/, unsigned target, size_t *nlinks/*in,out*/,
-    hbool_t *obj_exists, hid_t lapl_id, hid_t dxpl_id);
-static herr_t H5G_traverse_real(const H5G_loc_t *loc, const char *name,
-    unsigned target, size_t *nlinks, H5G_traverse_t op, void *op_data,
-    hid_t lapl_id, hid_t dxpl_id);
+static herr_t H5G__traverse_ud(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
+    H5G_loc_t *obj_loc/*in,out*/, unsigned target, hbool_t *obj_exists);
+static herr_t H5G__traverse_slink(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
+    H5G_loc_t *obj_loc/*in,out*/, unsigned target, hbool_t *obj_exists);
+static herr_t H5G__traverse_real(const H5G_loc_t *loc, const char *name,
+    unsigned target, H5G_traverse_t op, void *op_data);
 
 
 /*********************/
@@ -106,7 +102,7 @@ static herr_t H5G_traverse_real(const H5G_loc_t *loc, const char *name,
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_traverse_slink_cb
+ * Function:	H5G__traverse_slink_cb
  *
  * Purpose:	Callback for soft link traversal.  This routine sets the
  *              correct information for the object location.
@@ -119,14 +115,14 @@ static herr_t H5G_traverse_real(const H5G_loc_t *loc, const char *name,
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_traverse_slink_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc, const char H5_ATTR_UNUSED *name,
+H5G__traverse_slink_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc, const char H5_ATTR_UNUSED *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
     H5G_trav_slink_t *udata = (H5G_trav_slink_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check for dangling soft link */
     if(obj_loc == NULL) {
@@ -149,11 +145,11 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_traverse_slink_cb() */
+} /* end H5G__traverse_slink_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_traverse_link_ud
+ * Function:	H5G__traverse_ud
  *
  * Purpose:	Callback for user-defined link traversal.  Sets up a
  *              location ID and passes it to the user traversal callback.
@@ -166,9 +162,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_traverse_ud(const H5G_loc_t *grp_loc/*in,out*/, const H5O_link_t *lnk,
-    H5G_loc_t *obj_loc/*in,out*/, unsigned target, size_t *nlinks/*in,out*/,
-    hbool_t *obj_exists, hid_t _lapl_id, hid_t dxpl_id)
+H5G__traverse_ud(const H5G_loc_t *grp_loc/*in,out*/, const H5O_link_t *lnk,
+    H5G_loc_t *obj_loc/*in,out*/, unsigned target, hbool_t *obj_exists)
 {
     const H5L_class_t   *link_class;       /* User-defined link class */
     hid_t               cb_return = -1;         /* The ID the user-defined callback returned */
@@ -177,20 +172,16 @@ H5G_traverse_ud(const H5G_loc_t *grp_loc/*in,out*/, const H5O_link_t *lnk,
     H5O_loc_t           grp_oloc_copy;
     H5G_loc_t           new_loc;                /* Group location for newly opened external object */
     H5G_t              *grp;
-    hid_t               lapl_id = (-1);         /* LAPL local to this routine */
-    H5P_genplist_t     *lapl;                   /* LAPL with nlinks set */
     hid_t               cur_grp = (-1);
     herr_t              ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(grp_loc);
     HDassert(lnk);
     HDassert(lnk->type >= H5L_TYPE_UD_MIN);
     HDassert(obj_loc);
-    HDassert(nlinks);
-    HDassert(_lapl_id >= 0);
 
     /* Get the link class for this type of link. */
     if(NULL == (link_class = H5L_find_class(lnk->type)))
@@ -205,37 +196,17 @@ H5G_traverse_ud(const H5G_loc_t *grp_loc/*in,out*/, const H5O_link_t *lnk,
         HGOTO_ERROR(H5E_SYM, H5E_CANTCOPY, FAIL, "unable to copy object location")
 
     /* Create a group ID to pass to the user-defined callback */
-    if(NULL == (grp = H5G_open(&grp_loc_copy, dxpl_id)))
+    if(NULL == (grp = H5G_open(&grp_loc_copy)))
         HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
     if((cur_grp = H5I_register(H5I_GROUP, grp, FALSE)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, FAIL, "unable to register group")
 
-    /* Check for generic default property list and use link access default if so */
-    if(_lapl_id == H5P_DEFAULT) {
-        HDassert(H5P_LINK_ACCESS_DEFAULT != -1);
-        if(NULL == (lapl = (H5P_genplist_t *)H5I_object(H5P_LINK_ACCESS_DEFAULT)))
-            HGOTO_ERROR(H5E_SYM, H5E_BADATOM, FAIL, "unable to get default property list")
-    } /* end if */
-    else {
-        /* Get the underlying property list passed in */
-        if(NULL == (lapl = (H5P_genplist_t *)H5I_object(_lapl_id)))
-            HGOTO_ERROR(H5E_SYM, H5E_BADATOM, FAIL, "unable to get property list from ID")
-    } /* end else */
-
-    /* Copy the property list passed in */
-    if((lapl_id = H5P_copy_plist(lapl, FALSE)) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTCOPY, FAIL, "unable to copy property list")
-
-    /* Get the underlying property list copy */
-    if(NULL == (lapl = (H5P_genplist_t *)H5I_object(lapl_id)))
-        HGOTO_ERROR(H5E_SYM, H5E_BADATOM, FAIL, "unable to get property list from ID")
-
-    /* Record number of soft links left to traverse in the property list. */
-    if(H5P_set(lapl, H5L_ACS_NLINKS_NAME, nlinks) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set nlink info")
-
     /* User-defined callback function */
-    cb_return = (link_class->trav_func)(lnk->name, cur_grp, lnk->u.ud.udata, lnk->u.ud.size, lapl_id);
+    /* (Backwardly compatible with v0 H5L_class_t traverssal callback) */
+    if(link_class->version == H5L_LINK_CLASS_T_VERS_0)
+        cb_return = (((const H5L_class_0_t *)link_class)->trav_func)(lnk->name, cur_grp, lnk->u.ud.udata, lnk->u.ud.size, H5CX_get_lapl());
+    else
+        cb_return = (link_class->trav_func)(lnk->name, cur_grp, lnk->u.ud.udata, lnk->u.ud.size, H5CX_get_lapl(), H5CX_get_dxpl());
 
     /* Check for failing to locate the object */
     if(cb_return < 0) {
@@ -286,16 +257,12 @@ done:
     if(ret_value < 0 && cb_return > 0 && H5I_dec_ref(cb_return) < 0)
         HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "unable to close atom from UD callback")
 
-    /* Close the LAPL, if we copied one */
-    if(lapl_id > 0 && H5I_dec_ref(lapl_id) < 0)
-        HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "unable to close copied link access property list")
-
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_traverse_ud() */
+} /* end H5G__traverse_ud() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_traverse_slink
+ * Function:	H5G__traverse_slink
  *
  * Purpose:	Traverses symbolic link.  The link head appears in the group
  *		whose entry is GRP_LOC and the link tail entry is OBJ_LOC.
@@ -311,9 +278,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_traverse_slink(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
-    H5G_loc_t *obj_loc/*in,out*/, unsigned target, size_t *nlinks/*in,out*/,
-    hbool_t *obj_exists, hid_t lapl_id, hid_t dxpl_id)
+H5G__traverse_slink(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
+    H5G_loc_t *obj_loc/*in,out*/, unsigned target, hbool_t *obj_exists)
 {
     H5G_trav_slink_t      udata;                  /* User data to pass to link traversal callback */
     H5G_name_t          tmp_obj_path;           /* Temporary copy of object's path */
@@ -324,13 +290,12 @@ H5G_traverse_slink(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
     hbool_t             tmp_grp_loc_set = FALSE;       /* Flag to indicate that tmp group location is initialized */
     herr_t              ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(grp_loc);
     HDassert(lnk);
     HDassert(lnk->type == H5L_TYPE_SOFT);
-    HDassert(nlinks);
 
     /* Set up temporary location */
     tmp_grp_loc.oloc = &tmp_grp_oloc;
@@ -358,7 +323,7 @@ H5G_traverse_slink(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
     udata.obj_loc = obj_loc;
 
     /* Traverse the link */
-    if(H5G_traverse_real(&tmp_grp_loc, lnk->u.soft.name, target, nlinks, H5G_traverse_slink_cb, &udata, lapl_id, dxpl_id) < 0)
+    if(H5G__traverse_real(&tmp_grp_loc, lnk->u.soft.name, target, H5G__traverse_slink_cb, &udata) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to follow symbolic link")
 
     /* Pass back information about whether the object exists */
@@ -376,7 +341,7 @@ done:
         H5G_loc_free(&tmp_grp_loc);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_traverse_slink() */
+} /* end H5G__traverse_slink() */
 
 
 /*-------------------------------------------------------------------------
@@ -394,9 +359,10 @@ done:
  */
 herr_t
 H5G__traverse_special(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
-    unsigned target, size_t *nlinks, hbool_t last_comp,
-    H5G_loc_t *obj_loc, hbool_t *obj_exists, hid_t lapl_id, hid_t dxpl_id)
+    unsigned target, hbool_t last_comp, H5G_loc_t *obj_loc,
+    hbool_t *obj_exists)
 {
+    size_t nlinks;                      /* # of soft / UD links left to traverse */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_PACKAGE
@@ -405,7 +371,6 @@ H5G__traverse_special(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
     HDassert(grp_loc);
     HDassert(lnk);
     HDassert(obj_loc);
-    HDassert(nlinks);
 
     /*
      * If we found a symbolic link then we should follow it.  But if this
@@ -414,9 +379,20 @@ H5G__traverse_special(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
      */
     if(H5L_TYPE_SOFT == lnk->type &&
             (0 == (target & H5G_TARGET_SLINK) || !last_comp)) {
-        if((*nlinks)-- <= 0)
+        /* Get the # of soft / UD links left to traverse */
+        if(H5CX_get_nlinks(&nlinks) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to retrieve # of soft / UD links to traverse")
+
+        /* Decrement # of links and range check */
+        if((nlinks)-- <= 0)
             HGOTO_ERROR(H5E_LINK, H5E_NLINKS, FAIL, "too many links")
-        if(H5G_traverse_slink(grp_loc, lnk, obj_loc, (target & H5G_TARGET_EXISTS), nlinks, obj_exists, lapl_id, dxpl_id) < 0)
+
+        /* Update the # of links in the API context */
+        if(H5CX_set_nlinks(nlinks) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't update # of soft / UD links to traverse")
+
+        /* Traverse soft link */
+        if(H5G__traverse_slink(grp_loc, lnk, obj_loc, (target & H5G_TARGET_EXISTS), obj_exists) < 0)
             HGOTO_ERROR(H5E_LINK, H5E_TRAVERSE, FAIL, "symbolic link traversal failed")
     } /* end if */
 
@@ -427,9 +403,20 @@ H5G__traverse_special(const H5G_loc_t *grp_loc, const H5O_link_t *lnk,
      */
     if(lnk->type >= H5L_TYPE_UD_MIN &&
             (0 == (target & H5G_TARGET_UDLINK) || !last_comp) ) {
-        if((*nlinks)-- <= 0)
+        /* Get the # of soft / UD links left to traverse */
+        if(H5CX_get_nlinks(&nlinks) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to retrieve # of soft / UD links to traverse")
+
+        /* Decrement # of links and range check */
+        if((nlinks)-- <= 0)
             HGOTO_ERROR(H5E_LINK, H5E_NLINKS, FAIL, "too many links")
-        if(H5G_traverse_ud(grp_loc, lnk, obj_loc, (target & H5G_TARGET_EXISTS), nlinks, obj_exists, lapl_id, dxpl_id) < 0)
+
+        /* Update the # of links in the API context */
+        if(H5CX_set_nlinks(nlinks) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't update # of soft / UD links to traverse")
+
+        /* Traverse user-defined link */
+        if(H5G__traverse_ud(grp_loc, lnk, obj_loc, (target & H5G_TARGET_EXISTS), obj_exists) < 0)
             HGOTO_ERROR(H5E_LINK, H5E_TRAVERSE, FAIL, "user-defined link traversal failed")
     } /* end if */
 
@@ -464,7 +451,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5G_traverse_real
+ * Function:	H5G__traverse_real
  *
  * Purpose:	Internal version of path traversal routine
  *
@@ -480,8 +467,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
-    size_t *nlinks, H5G_traverse_t op, void *op_data, hid_t lapl_id, hid_t dxpl_id)
+H5G__traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
+    H5G_traverse_t op, void *op_data)
 {
     H5G_loc_t           loc;            /* Location of start object     */
     H5O_loc_t           grp_oloc;	/* Object loc. for current group */
@@ -502,12 +489,11 @@ H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
     hbool_t last_comp = FALSE;          /* Flag to indicate that a component is the last component in the name */
     herr_t              ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check parameters */
     HDassert(_loc);
     HDassert(name);
-    HDassert(nlinks);
     HDassert(op);
 
     /*
@@ -592,7 +578,7 @@ H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
         } /* end if */
 
         /* Get information for object in current group */
-        if((lookup_status = H5G__obj_lookup(grp_loc.oloc, comp, &lnk/*out*/, dxpl_id)) < 0)
+        if((lookup_status = H5G__obj_lookup(grp_loc.oloc, comp, &lnk/*out*/)) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "can't look up component")
         obj_exists = FALSE;
 
@@ -613,7 +599,7 @@ H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
 
             /* Perform any special traversals that the link needs */
             /* (soft links, user-defined links, file mounting, etc.) */
-            if(H5G__traverse_special(&grp_loc, &lnk, target, nlinks, last_comp, &obj_loc, &obj_exists, lapl_id, dxpl_id) < 0)
+            if(H5G__traverse_special(&grp_loc, &lnk, target, last_comp, &obj_loc, &obj_exists) < 0)
                 HGOTO_ERROR(H5E_LINK, H5E_TRAVERSE, FAIL, "special link traversal failed")
         } /* end if */
 
@@ -662,11 +648,11 @@ H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
 
                 /* Check for the parent group having a group info message */
                 /* (OK if not found) */
-                if((exists = H5O_msg_exists(grp_loc.oloc, H5O_GINFO_ID, dxpl_id)) < 0)
+                if((exists = H5O_msg_exists(grp_loc.oloc, H5O_GINFO_ID)) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to read object header")
                 if(exists) {
                     /* Get the group info for parent group */
-                    if(NULL == H5O_msg_read(grp_loc.oloc, H5O_GINFO_ID, &par_ginfo, dxpl_id))
+                    if(NULL == H5O_msg_read(grp_loc.oloc, H5O_GINFO_ID, &par_ginfo))
                         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "group info message not present")
 
                     /* Use parent group info settings */
@@ -679,7 +665,7 @@ H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
                 /* Check for the parent group having a link info message */
                 /* (OK if not found) */
                 /* Get the link info for parent group */
-                if((exists = H5G__obj_get_linfo(grp_loc.oloc, &par_linfo, dxpl_id)) < 0)
+                if((exists = H5G__obj_get_linfo(grp_loc.oloc, &par_linfo)) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to read object header")
                 if(exists) {
                     /* Only keep the creation order information from the parent
@@ -696,11 +682,11 @@ H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
 
                 /* Check for the parent group having a filter pipeline message */
                 /* (OK if not found) */
-                if((exists = H5O_msg_exists(grp_loc.oloc, H5O_PLINE_ID, dxpl_id)) < 0)
+                if((exists = H5O_msg_exists(grp_loc.oloc, H5O_PLINE_ID)) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to read object header")
                 if(exists) {
                     /* Get the filter pipeline for parent group */
-                    if(NULL == H5O_msg_read(grp_loc.oloc, H5O_PLINE_ID, &par_pline, dxpl_id))
+                    if(NULL == H5O_msg_read(grp_loc.oloc, H5O_PLINE_ID, &par_pline))
                         HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "filter pipeline message not present")
 
                     /* Use parent filter pipeline settings */
@@ -715,15 +701,15 @@ H5G_traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
                 gcrt_info.gcpl_id = H5P_GROUP_CREATE_DEFAULT;
                 gcrt_info.cache_type = H5G_NOTHING_CACHED;
                 HDmemset(&gcrt_info.cache, 0, sizeof(gcrt_info.cache));
-                if(H5G__obj_create_real(grp_oloc.file, dxpl_id, ginfo, linfo, pline, &gcrt_info, obj_loc.oloc/*out*/) < 0)
+                if(H5G__obj_create_real(grp_oloc.file, ginfo, linfo, pline, &gcrt_info, obj_loc.oloc/*out*/) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to create group entry")
 
                 /* Insert new group into current group's symbol table */
-                if(H5G__loc_insert(&grp_loc, comp, &obj_loc, H5O_TYPE_GROUP, &gcrt_info, dxpl_id) < 0)
+                if(H5G__loc_insert(&grp_loc, comp, &obj_loc, H5O_TYPE_GROUP, &gcrt_info) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "unable to insert intermediate group")
 
                 /* Decrement refcount on intermediate group's object header in memory */
-                if(H5O_dec_rc_by_loc(obj_loc.oloc, dxpl_id) < 0)
+                if(H5O_dec_rc_by_loc(obj_loc.oloc) < 0)
                     HGOTO_ERROR(H5E_SYM, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
 
                 /* Close new group */
@@ -808,7 +794,7 @@ done:
         HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "can't release wrapped buffer")
 
    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5G_traverse_real() */
+} /* end H5G__traverse_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -829,11 +815,10 @@ done:
  */
 herr_t
 H5G_traverse(const H5G_loc_t *loc, const char *name, unsigned target, H5G_traverse_t op,
-    void *op_data, hid_t lapl_id, hid_t dxpl_id)
+    void *op_data)
 {
-    size_t	    nlinks;                 /* Link countdown value */
-    H5P_genplist_t *lapl;                   /* Property list with value for nlinks */
-    herr_t          ret_value = SUCCEED;    /* Return value */
+    size_t orig_nlinks;                 /* Original value for # of soft / UD links able to traverse */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -844,17 +829,14 @@ H5G_traverse(const H5G_loc_t *loc, const char *name, unsigned target, H5G_traver
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "no starting location")
     if(!op)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "no operation provided")
-    HDassert(lapl_id >= 0);
 
-    /* Set nlinks value from property list, if it exists */
-    if(lapl_id == H5P_DEFAULT)
-        nlinks = H5L_NUM_LINKS;
-    else {
-        if(NULL == (lapl = (H5P_genplist_t *)H5I_object(lapl_id)))
-            HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
-        if(H5P_get(lapl, H5L_ACS_NLINKS_NAME, &nlinks) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get number of links")
-    } /* end else */
+    /* Retrieve the original # of soft / UD links that are able to be traversed */
+    /* (So that multiple calls to H5G_traverse don't incorrectly look
+     *  like they've traversed too many.  Nested calls, like in H5L__move(),
+     *  may need their own mechanism to set & reset the # of links to traverse)
+     */
+    if(H5CX_get_nlinks(&orig_nlinks) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "unable to retrieve # of soft / UD links to traverse")
 
     /* Set up invalid tag. This is a precautionary step only. Setting an invalid
        tag here will ensure that no metadata accessed while doing the traversal
@@ -862,14 +844,18 @@ H5G_traverse(const H5G_loc_t *loc, const char *name, unsigned target, H5G_traver
        first. This will ensure we're not accidentally tagging something we 
        shouldn't be during the traversal. Note that for best tagging assertion 
        coverage, setting H5C_DO_TAGGING_SANITY_CHECKS is advised. */
-    H5_BEGIN_TAG(dxpl_id, H5AC__INVALID_TAG, FAIL);
+    H5_BEGIN_TAG(H5AC__INVALID_TAG);
 
     /* Go perform "real" traversal */
-    if(H5G_traverse_real(loc, name, target, &nlinks, op, op_data, lapl_id, dxpl_id) < 0)
+    if(H5G__traverse_real(loc, name, target, op, op_data) < 0)
         HGOTO_ERROR_TAG(H5E_SYM, H5E_NOTFOUND, FAIL, "internal path traversal failed")
 
     /* Reset tag after traversal */
-    H5_END_TAG(FAIL);
+    H5_END_TAG
+
+    /* Reset the # of soft / UD links that can be traversed */
+    if(H5CX_set_nlinks(orig_nlinks) < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't reset # of soft / UD links to traverse")
 
 done:
    FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5HF.c b/src/H5HF.c
index efd57ae..b7a6244 100644
--- a/src/H5HF.c
+++ b/src/H5HF.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -152,7 +150,7 @@ H5HF_op_write(const void *obj, size_t obj_len, void *op_data)
  *-------------------------------------------------------------------------
  */
 H5HF_t *
-H5HF_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam)
+H5HF_create(H5F_t *f, const H5HF_create_t *cparam)
 {
     H5HF_t *fh = NULL;          /* Pointer to new fractal heap */
     H5HF_hdr_t *hdr = NULL;     /* The fractal heap header information */
@@ -168,7 +166,7 @@ H5HF_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam)
     HDassert(cparam);
 
     /* Create shared fractal heap header */
-    if(HADDR_UNDEF == (fh_addr = H5HF_hdr_create(f, dxpl_id, cparam)))
+    if(HADDR_UNDEF == (fh_addr = H5HF_hdr_create(f, cparam)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, NULL, "can't create fractal heap header")
 
     /* Allocate fractal heap wrapper */
@@ -176,7 +174,7 @@ H5HF_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, NULL, "memory allocation failed for fractal heap info")
 
     /* Lock the heap header into memory */
-    if(NULL == (hdr = H5HF_hdr_protect(f, dxpl_id, fh_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (hdr = H5HF__hdr_protect(f, fh_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect fractal heap header")
 
     /* Point fractal heap wrapper at header and bump it's ref count */
@@ -195,10 +193,10 @@ H5HF_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam)
     ret_value = fh;
 
 done:
-    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5AC_unprotect(f, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, NULL, "unable to release fractal heap header")
     if(!ret_value && fh)
-        if(H5HF_close(fh, dxpl_id) < 0)
+        if(H5HF_close(fh) < 0)
             HDONE_ERROR(H5E_HEAP, H5E_CANTCLOSEOBJ, NULL, "unable to close fractal heap")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -220,7 +218,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5HF_t *
-H5HF_open(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr)
+H5HF_open(H5F_t *f, haddr_t fh_addr)
 {
     H5HF_t *fh = NULL;          /* Pointer to new fractal heap */
     H5HF_hdr_t *hdr = NULL;     /* The fractal heap header information */
@@ -235,7 +233,7 @@ H5HF_open(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr)
     HDassert(H5F_addr_defined(fh_addr));
 
     /* Load the heap header into memory */
-    if(NULL == (hdr = H5HF_hdr_protect(f, dxpl_id, fh_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5HF__hdr_protect(f, fh_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect fractal heap header")
 
     /* Check for pending heap deletion */
@@ -262,10 +260,10 @@ H5HF_open(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr)
     ret_value = fh;
 
 done:
-    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5AC_unprotect(f, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, NULL, "unable to release fractal heap header")
     if(!ret_value && fh)
-        if(H5HF_close(fh, dxpl_id) < 0)
+        if(H5HF_close(fh) < 0)
             HDONE_ERROR(H5E_HEAP, H5E_CANTCLOSEOBJ, NULL, "unable to close fractal heap")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -349,8 +347,7 @@ H5HF_get_heap_addr(const H5HF_t *fh, haddr_t *heap_addr_p)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_insert(H5HF_t *fh, hid_t dxpl_id, size_t size, const void *obj,
-    void *id/*out*/)
+H5HF_insert(H5HF_t *fh, size_t size, const void *obj, void *id/*out*/)
 {
     H5HF_hdr_t *hdr = NULL;                  /* The fractal heap header information */
     herr_t ret_value = SUCCEED;
@@ -376,7 +373,7 @@ H5HF_insert(H5HF_t *fh, hid_t dxpl_id, size_t size, const void *obj,
     if(size > hdr->max_man_size) {
         /* Store 'huge' object in heap */
         /* (Casting away const OK - QAK) */
-        if(H5HF_huge_insert(hdr, dxpl_id, size, (void *)obj, id) < 0)
+        if(H5HF__huge_insert(hdr, size, (void *)obj, id) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "can't store 'huge' object in fractal heap")
     } /* end if */
     /* Check for 'tiny' object */
@@ -392,7 +389,7 @@ HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "'write once' managed blocks not su
         } /* end if */
         else {
             /* Allocate space for object in 'managed' heap */
-            if(H5HF_man_insert(hdr, dxpl_id, size, obj, id) < 0)
+            if(H5HF__man_insert(hdr, size, obj, id) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "can't store 'managed' object in fractal heap")
         } /* end else */
     } /* end else */
@@ -416,7 +413,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_get_obj_len(H5HF_t *fh, hid_t dxpl_id, const void *_id, size_t *obj_len_p)
+H5HF_get_obj_len(H5HF_t *fh, const void *_id, size_t *obj_len_p)
 {
     const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
     uint8_t id_flags;                   /* Heap ID flag bits */
@@ -447,7 +444,7 @@ H5HF_get_obj_len(H5HF_t *fh, hid_t dxpl_id, const void *_id, size_t *obj_len_p)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't get 'managed' object's length")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
-        if(H5HF_huge_get_obj_len(fh->hdr, dxpl_id, id, obj_len_p) < 0)
+        if(H5HF__huge_get_obj_len(fh->hdr, id, obj_len_p) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't get 'huge' object's length")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
@@ -478,7 +475,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_get_obj_off(H5HF_t *fh, hid_t dxpl_id, const void *_id, hsize_t *obj_off_p)
+H5HF_get_obj_off(H5HF_t *fh, const void *_id, hsize_t *obj_off_p)
 {
     const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
     uint8_t id_flags;                   /* Heap ID flag bits */
@@ -509,7 +506,7 @@ H5HF_get_obj_off(H5HF_t *fh, hid_t dxpl_id, const void *_id, hsize_t *obj_off_p)
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
         /* Huge objects are located directly in the file */
-        if(H5HF__huge_get_obj_off(fh->hdr, dxpl_id, id, obj_off_p) < 0)
+        if(H5HF__huge_get_obj_off(fh->hdr, id, obj_off_p) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't get 'huge' object's offset")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
@@ -540,7 +537,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_read(H5HF_t *fh, hid_t dxpl_id, const void *_id, void *obj/*out*/)
+H5HF_read(H5HF_t *fh, const void *_id, void *obj/*out*/)
 {
     const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
     uint8_t id_flags;                   /* Heap ID flag bits */
@@ -568,12 +565,12 @@ H5HF_read(H5HF_t *fh, hid_t dxpl_id, const void *_id, void *obj/*out*/)
     /* Check type of object in heap */
     if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_MAN) {
         /* Read object from managed heap blocks */
-        if(H5HF_man_read(fh->hdr, dxpl_id, id, obj) < 0)
+        if(H5HF__man_read(fh->hdr, id, obj) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't read object from fractal heap")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
         /* Read 'huge' object from file */
-        if(H5HF_huge_read(fh->hdr, dxpl_id, id, obj) < 0)
+        if(H5HF__huge_read(fh->hdr, id, obj) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't read 'huge' object from fractal heap")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
@@ -617,8 +614,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_write(H5HF_t *fh, hid_t dxpl_id, void *_id, hbool_t H5_ATTR_UNUSED *id_changed,
-    const void *obj)
+H5HF_write(H5HF_t *fh, void *_id, hbool_t H5_ATTR_UNUSED *id_changed, const void *obj)
 {
     uint8_t *id = (uint8_t *)_id;       /* Object ID */
     uint8_t id_flags;                   /* Heap ID flag bits */
@@ -647,12 +643,12 @@ H5HF_write(H5HF_t *fh, hid_t dxpl_id, void *_id, hbool_t H5_ATTR_UNUSED *id_chan
     if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_MAN) {
         /* Operate on object from managed heap blocks */
         /* (ID can't change and modifying object is "easy" to manage) */
-        if(H5HF_man_write(fh->hdr, dxpl_id, id, obj) < 0)
+        if(H5HF__man_write(fh->hdr, id, obj) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, "can't write to 'managed' heap object")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
         /* Operate on "huge" object */
-        if(H5HF_huge_write(fh->hdr, dxpl_id, id, obj) < 0)
+        if(H5HF__huge_write(fh->hdr, id, obj) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, "can't write to 'huge' heap object")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
@@ -689,8 +685,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_op(H5HF_t *fh, hid_t dxpl_id, const void *_id, H5HF_operator_t op,
-    void *op_data)
+H5HF_op(H5HF_t *fh, const void *_id, H5HF_operator_t op, void *op_data)
 {
     const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
     uint8_t id_flags;                   /* Heap ID flag bits */
@@ -718,12 +713,12 @@ H5HF_op(H5HF_t *fh, hid_t dxpl_id, const void *_id, H5HF_operator_t op,
     /* Check type of object in heap */
     if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_MAN) {
         /* Operate on object from managed heap blocks */
-        if(H5HF_man_op(fh->hdr, dxpl_id, id, op, op_data) < 0)
+        if(H5HF__man_op(fh->hdr, id, op, op_data) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTOPERATE, FAIL, "can't operate on object from fractal heap")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
         /* Operate on 'huge' object from file */
-        if(H5HF_huge_op(fh->hdr, dxpl_id, id, op, op_data) < 0)
+        if(H5HF__huge_op(fh->hdr, id, op, op_data) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTOPERATE, FAIL, "can't operate on 'huge' object from fractal heap")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
@@ -755,7 +750,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_remove(H5HF_t *fh, hid_t dxpl_id, const void *_id)
+H5HF_remove(H5HF_t *fh, const void *_id)
 {
     const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
     uint8_t id_flags;                   /* Heap ID flag bits */
@@ -783,12 +778,12 @@ H5HF_remove(H5HF_t *fh, hid_t dxpl_id, const void *_id)
     /* Check type of object in heap */
     if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_MAN) {
         /* Remove object from managed heap blocks */
-        if(H5HF_man_remove(fh->hdr, dxpl_id, id) < 0)
+        if(H5HF__man_remove(fh->hdr, id) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove object from fractal heap")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
         /* Remove 'huge' object from file & v2 B-tree tracker */
-        if(H5HF_huge_remove(fh->hdr, dxpl_id, id) < 0)
+        if(H5HF__huge_remove(fh->hdr, id) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove 'huge' object from fractal heap")
     } /* end if */
     else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
@@ -820,7 +815,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_close(H5HF_t *fh, hid_t dxpl_id)
+H5HF_close(H5HF_t *fh)
 {
     hbool_t pending_delete = FALSE;     /* Whether the heap is pending deletion */
     haddr_t heap_addr = HADDR_UNDEF;    /* Address of heap (for deletion) */
@@ -844,7 +839,7 @@ H5HF_close(H5HF_t *fh, hid_t dxpl_id)
          *      a reference loop and the objects couldn't be removed from
          *      the metadata cache - QAK)
          */
-        if(H5HF_space_close(fh->hdr, dxpl_id) < 0)
+        if(H5HF__space_close(fh->hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release free space info")
 
         /* Reset the block iterator, if necessary */
@@ -862,7 +857,7 @@ H5HF_close(H5HF_t *fh, hid_t dxpl_id)
          *      has the address of an object in the file, which might be
          *      modified by the shutdown routine - QAK)
          */
-        if(H5HF_huge_term(fh->hdr, dxpl_id) < 0)
+        if(H5HF__huge_term(fh->hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release 'huge' object info")
 
         /* Check for pending heap deletion */
@@ -887,11 +882,11 @@ H5HF_close(H5HF_t *fh, hid_t dxpl_id)
         H5HF_hdr_t *hdr;            /* Another pointer to fractal heap header */
 
         /* Lock the heap header into memory */
-        if(NULL == (hdr = H5HF_hdr_protect(fh->f, dxpl_id, heap_addr, H5AC__NO_FLAGS_SET)))
+        if(NULL == (hdr = H5HF__hdr_protect(fh->f, heap_addr, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap header")
 
         /* Delete heap, starting with header (unprotects header) */
-        if(H5HF_hdr_delete(hdr, dxpl_id) < 0)
+        if(H5HF__hdr_delete(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDELETE, FAIL, "unable to delete fractal heap")
     } /* end if */
 
@@ -917,7 +912,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_delete(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr)
+H5HF_delete(H5F_t *f, haddr_t fh_addr)
 {
     H5HF_hdr_t *hdr = NULL;             /* The fractal heap header information */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -931,7 +926,7 @@ H5HF_delete(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr)
     HDassert(H5F_addr_defined(fh_addr));
 
     /* Lock the heap header into memory */
-    if(NULL == (hdr = H5HF_hdr_protect(f, dxpl_id, fh_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (hdr = H5HF__hdr_protect(f, fh_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap header")
 
     /* Check for files using shared heap header */
@@ -939,14 +934,14 @@ H5HF_delete(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr)
         hdr->pending_delete = TRUE;
     else {
         /* Delete heap now, starting with header (unprotects header) */
-        if(H5HF_hdr_delete(hdr, dxpl_id) < 0)
+        if(H5HF__hdr_delete(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDELETE, FAIL, "unable to delete fractal heap")
         hdr = NULL;
     } /* end if */
 
 done:
     /* Unprotect the header, if an error occurred */
-    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5AC_unprotect(f, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap header")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5HFbtree2.c b/src/H5HFbtree2.c
index d4a30b8..5807c56 100644
--- a/src/H5HFbtree2.c
+++ b/src/H5HFbtree2.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -308,7 +306,7 @@ H5HF__huge_bt2_indir_remove(const void *nrecord, void *_udata)
     FUNC_ENTER_PACKAGE
 
     /* Free the space in the file for the object being removed */
-    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, udata->dxpl_id, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->len) < 0)
+    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->len) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free space for huge object on disk")
 
     /* Set the length of the object removed */
@@ -511,7 +509,7 @@ H5HF__huge_bt2_filt_indir_remove(const void *nrecord, void *_udata)
     FUNC_ENTER_PACKAGE
 
     /* Free the space in the file for the object being removed */
-    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, udata->dxpl_id, ((const H5HF_huge_bt2_filt_indir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_filt_indir_rec_t *)nrecord)->len) < 0)
+    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, ((const H5HF_huge_bt2_filt_indir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_filt_indir_rec_t *)nrecord)->len) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free space for huge object on disk")
 
     /* Set the length of the object removed */
@@ -693,7 +691,7 @@ H5HF__huge_bt2_dir_remove(const void *nrecord, void *_udata)
     FUNC_ENTER_PACKAGE
 
     /* Free the space in the file for the object being removed */
-    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, udata->dxpl_id, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->len) < 0)
+    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_indir_rec_t *)nrecord)->len) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free space for huge object on disk")
 
     /* Set the length of the object removed */
@@ -905,7 +903,7 @@ H5HF__huge_bt2_filt_dir_remove(const void *nrecord, void *_udata)
     FUNC_ENTER_PACKAGE
 
     /* Free the space in the file for the object being removed */
-    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, udata->dxpl_id, ((const H5HF_huge_bt2_filt_dir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_filt_dir_rec_t *)nrecord)->len) < 0)
+    if(H5MF_xfree(udata->hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, ((const H5HF_huge_bt2_filt_dir_rec_t *)nrecord)->addr, ((const H5HF_huge_bt2_filt_dir_rec_t *)nrecord)->len) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free space for huge object on disk")
 
     /* Set the length of the object removed */
diff --git a/src/H5HFcache.c b/src/H5HFcache.c
index ffdac9a..84d5c5f 100644
--- a/src/H5HFcache.c
+++ b/src/H5HFcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -81,9 +79,8 @@ static htri_t H5HF__cache_hdr_verify_chksum(const void *image_ptr, size_t len, v
 static void *H5HF__cache_hdr_deserialize(const void *image, size_t len,
     void *udata, hbool_t *dirty); 
 static herr_t H5HF__cache_hdr_image_len(const void *thing, size_t *image_len);
-static herr_t H5HF__cache_hdr_pre_serialize(H5F_t *f, hid_t dxpl_id,
-    void *thing, haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len, 
-    unsigned *flags); 
+static herr_t H5HF__cache_hdr_pre_serialize(H5F_t *f, void *thing, haddr_t addr,
+    size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags); 
 static herr_t H5HF__cache_hdr_serialize(const H5F_t *f, void *image,
     size_t len, void *thing); 
 static herr_t H5HF__cache_hdr_free_icr(void *thing);
@@ -93,9 +90,8 @@ static htri_t H5HF__cache_iblock_verify_chksum(const void *image_ptr, size_t len
 static void *H5HF__cache_iblock_deserialize(const void *image, size_t len,
     void *udata, hbool_t *dirty); 
 static herr_t H5HF__cache_iblock_image_len(const void *thing, size_t *image_len);
-static herr_t H5HF__cache_iblock_pre_serialize(H5F_t *f, hid_t dxpl_id,
-    void *thing, haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len,
-    unsigned *flags); 
+static herr_t H5HF__cache_iblock_pre_serialize(H5F_t *f, void *thing,
+    haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags); 
 static herr_t H5HF__cache_iblock_serialize(const H5F_t *f, void *image,
     size_t len, void *thing); 
 static herr_t H5HF__cache_iblock_notify(H5AC_notify_action_t action, void *thing); 
@@ -106,26 +102,26 @@ static htri_t H5HF__cache_dblock_verify_chksum(const void *image_ptr, size_t len
 static void *H5HF__cache_dblock_deserialize(const void *image, size_t len,
     void *udata, hbool_t *dirty); 
 static herr_t H5HF__cache_dblock_image_len(const void *thing, size_t *image_len);
-static herr_t H5HF__cache_dblock_pre_serialize(H5F_t *f, hid_t dxpl_id,
-    void *thing, haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len,
-    unsigned *flags); 
+static herr_t H5HF__cache_dblock_pre_serialize(H5F_t *f, void *thing, haddr_t addr,
+    size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags); 
 static herr_t H5HF__cache_dblock_serialize(const H5F_t *f, void *image,
     size_t len, void *thing); 
 static herr_t H5HF__cache_dblock_notify(H5AC_notify_action_t action, void *thing);
 static herr_t H5HF__cache_dblock_free_icr(void *thing);
+static herr_t H5HF__cache_dblock_fsf_size(const void *_thing, hsize_t *fsf_size);
 
 /* Debugging Function Prototypes */
 #ifndef NDEBUG
-static herr_t H5HF__cache_verify_hdr_descendants_clean(H5F_t *f, hid_t dxpl_id,
-    H5HF_hdr_t *hdr, hbool_t *fd_clean, hbool_t *clean);
+static herr_t H5HF__cache_verify_hdr_descendants_clean(H5F_t *f, H5HF_hdr_t *hdr,
+    hbool_t *fd_clean, hbool_t *clean);
 static herr_t H5HF__cache_verify_iblock_descendants_clean(H5F_t *f, 
-    hid_t dxpl_id, haddr_t fd_parent_addr, H5HF_indirect_t *iblock, 
-    unsigned *iblock_status, hbool_t *fd_clean, hbool_t *clean);
+    haddr_t fd_parent_addr, H5HF_indirect_t *iblock, unsigned *iblock_status,
+    hbool_t *fd_clean, hbool_t *clean);
 static herr_t H5HF__cache_verify_iblocks_dblocks_clean(H5F_t *f, 
     haddr_t fd_parent_addr, H5HF_indirect_t *iblock, hbool_t *fd_clean, 
     hbool_t *clean, hbool_t *has_dblocks);
 static herr_t H5HF__cache_verify_descendant_iblocks_clean(H5F_t *f, 
-    hid_t dxpl_id, haddr_t fd_parent_addr, H5HF_indirect_t *iblock, 
+    haddr_t fd_parent_addr, H5HF_indirect_t *iblock, 
     hbool_t *fd_clean, hbool_t *clean, hbool_t *has_iblocks);
 #endif /* NDEBUG */
 
@@ -185,7 +181,7 @@ const H5AC_class_t H5AC_FHEAP_DBLOCK[1] = {{
     H5HF__cache_dblock_serialize,       /* 'serialize' callback */
     H5HF__cache_dblock_notify,          /* 'notify' callback */
     H5HF__cache_dblock_free_icr,        /* 'free_icr' callback */
-    NULL,                               /* 'fsf_size' callback */
+    H5HF__cache_dblock_fsf_size,        /* 'fsf_size' callback */
 }};
 
 
@@ -574,7 +570,7 @@ H5HF__cache_hdr_deserialize(const void *_image, size_t len, void *_udata,
         UINT32DECODE(image, hdr->pline_root_direct_filter_mask);
 
         /* Decode I/O filter information */
-        if(NULL == (pline = (H5O_pline_t *)H5O_msg_decode(hdr->f, udata->dxpl_id, NULL, H5O_PLINE_ID, image)))
+        if(NULL == (pline = (H5O_pline_t *)H5O_msg_decode(hdr->f, NULL, H5O_PLINE_ID, len, image)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDECODE, NULL, "can't decode I/O pipeline filters")
 
         /* Advance past filter info to checksum */
@@ -667,9 +663,9 @@ H5HF__cache_hdr_image_len(const void *_thing, size_t *image_len)
  *-------------------------------------------------------------------------
  */
 static herr_t 
-H5HF__cache_hdr_pre_serialize(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    void *_thing, haddr_t addr, size_t len, haddr_t H5_ATTR_UNUSED *new_addr,
-    size_t H5_ATTR_UNUSED *new_len, unsigned *flags)
+H5HF__cache_hdr_pre_serialize(H5F_t *f, void *_thing, haddr_t addr, size_t len,
+    haddr_t H5_ATTR_UNUSED *new_addr, size_t H5_ATTR_UNUSED *new_len,
+    unsigned *flags)
 {
     H5HF_hdr_t *hdr = (H5HF_hdr_t *)_thing;     /* Fractal heap info */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -718,7 +714,7 @@ H5HF__cache_hdr_pre_serialize(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id,
      * call still looks for dirty descendants.  At present we do not check
      * this value.
      */
-    if(H5HF__cache_verify_hdr_descendants_clean((H5F_t *)f, dxpl_id, hdr, &fd_children_clean, &descendants_clean) < 0)
+    if(H5HF__cache_verify_hdr_descendants_clean((H5F_t *)f, hdr, &fd_children_clean, &descendants_clean) < 0)
          HGOTO_ERROR(H5E_HEAP, H5E_SYSTEM, FAIL, "can't verify hdr descendants clean.")
     HDassert(fd_children_clean);
 }
@@ -1046,7 +1042,10 @@ H5HF__cache_iblock_deserialize(const void *_image, size_t len, void *_udata,
     /* this copy of the parent pointer is needed by the notify callback so */
     /* that it can take down flush dependencies on eviction even if        */
     /* the parent pointer has been nulled out.             JRM -- 5/18/14  */
-    iblock->fd_parent = udata->par_info->iblock;
+    if(udata->par_info->iblock)
+        iblock->fd_parent = udata->par_info->iblock;
+    else
+        iblock->fd_parent = udata->par_info->hdr;
     iblock->par_entry = udata->par_info->entry;
     if(iblock->parent) {
         /* Share parent block */
@@ -1205,9 +1204,9 @@ H5HF__cache_iblock_image_len(const void *_thing, size_t *image_len)
  *-------------------------------------------------------------------------
  */
 static herr_t 
-H5HF__cache_iblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
-    haddr_t addr, size_t H5_ATTR_UNUSED len, haddr_t *new_addr,
-    size_t H5_ATTR_UNUSED *new_len, unsigned *flags)
+H5HF__cache_iblock_pre_serialize(H5F_t *f, void *_thing, haddr_t addr,
+    size_t H5_ATTR_UNUSED len, haddr_t *new_addr, size_t H5_ATTR_UNUSED *new_len,
+    unsigned *flags)
 {
     H5HF_hdr_t          *hdr;                   /* Shared fractal heap information */
     H5HF_indirect_t     *iblock = (H5HF_indirect_t *)_thing;    /* Indirect block info */
@@ -1249,7 +1248,7 @@ H5HF__cache_iblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
      * there is no need to check to see if it is pinned or protected, or to
      * protect it if it is not.
      */
-    if(H5HF__cache_verify_iblock_descendants_clean((H5F_t *)f, dxpl_id, iblock->addr, iblock, &iblock_status, &fd_children_clean, &descendants_clean) < 0)
+    if(H5HF__cache_verify_iblock_descendants_clean((H5F_t *)f, iblock->addr, iblock, &iblock_status, &fd_children_clean, &descendants_clean) < 0)
          HGOTO_ERROR(H5E_HEAP, H5E_SYSTEM, FAIL, "can't verify descendants clean.")
     HDassert(fd_children_clean);
 }
@@ -1262,14 +1261,14 @@ H5HF__cache_iblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
         haddr_t iblock_addr;
 
         /* Allocate 'normal' space for the new indirect block on disk */
-        if(HADDR_UNDEF == (iblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_IBLOCK, dxpl_id, (hsize_t)iblock->size)))
+        if(HADDR_UNDEF == (iblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_IBLOCK, (hsize_t)iblock->size)))
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap indirect block")
 
         /* Sanity check */
         HDassert(!H5F_addr_eq(iblock->addr, iblock_addr));
 
         /* Let the metadata cache know the block moved */
-        if(H5AC_move_entry((H5F_t *)f, H5AC_FHEAP_IBLOCK, iblock->addr, iblock_addr, dxpl_id) < 0)
+        if(H5AC_move_entry((H5F_t *)f, H5AC_FHEAP_IBLOCK, iblock->addr, iblock_addr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTMOVE, FAIL, "unable to move indirect block")
 
         /* Update the internal address for the block */
@@ -1461,9 +1460,6 @@ H5HF__cache_iblock_notify(H5AC_notify_action_t action, void *_thing)
     HDassert(iblock->cache_info.type == H5AC_FHEAP_IBLOCK);
     HDassert(iblock->hdr);
 
-    if(action == H5AC_NOTIFY_ACTION_BEFORE_EVICT)
-        HDassert((iblock->parent == iblock->fd_parent) || ((NULL == iblock->parent) && (iblock->fd_parent)));
-
     /* further sanity checks */
     if(iblock->parent == NULL) {
         /* pointer from hdr to root iblock will not be set up unless */
@@ -1494,16 +1490,10 @@ H5HF__cache_iblock_notify(H5AC_notify_action_t action, void *_thing)
     switch(action) {
         case H5AC_NOTIFY_ACTION_AFTER_INSERT:
         case H5AC_NOTIFY_ACTION_AFTER_LOAD:
-            if(iblock->parent) {        /* this is a child iblock */
-                /* create flush dependency with parent iblock */
-                if(H5AC_create_flush_dependency(iblock->parent, iblock) < 0)
+            /* Create flush dependency with parent, if there is one */
+            if(iblock->fd_parent)
+                if(H5AC_create_flush_dependency(iblock->fd_parent, iblock) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
-            } /* end if */
-            else {      /* this is the root iblock */
-                /* create flush dependency with header */
-                if(H5AC_create_flush_dependency(iblock->hdr, iblock) < 0)
-                    HGOTO_ERROR(H5E_HEAP, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
-            } /* end else */
             break;
 
 	case H5AC_NOTIFY_ACTION_AFTER_FLUSH:
@@ -1517,16 +1507,12 @@ H5HF__cache_iblock_notify(H5AC_notify_action_t action, void *_thing)
 	    break;
 
         case H5AC_NOTIFY_ACTION_BEFORE_EVICT:
-            if(iblock->fd_parent) {     /* this is a child iblock */
-                /* destroy flush dependency with parent iblock */
+            if(iblock->fd_parent) {
+                /* Destroy flush dependency with parent */
                 if(H5AC_destroy_flush_dependency(iblock->fd_parent, iblock) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
+                iblock->fd_parent = NULL;
             } /* end if */
-            else {      /* this is the root iblock */
-                /* destroy flush dependency with header */
-                if(H5AC_destroy_flush_dependency(iblock->hdr, iblock) < 0)
-                    HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
-            } /* end else */
             break;
 
         default:
@@ -1673,9 +1659,13 @@ H5HF__cache_dblock_verify_chksum(const void *_image, size_t len, void *_udata)
 	HGOTO_DONE(TRUE);
 
     if(hdr->filter_len > 0) {
-	size_t nbytes;          /* Number of bytes used in buffer, after applying reverse filters */
-	unsigned filter_mask;	/* Excluded filters for direct block */
-	H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        size_t nbytes;          /* Number of bytes used in buffer, after applying reverse filters */
+        unsigned filter_mask;	/* Excluded filters for direct block */
+        H5Z_cb_t filter_cb;     /* Filter callback structure */
+
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;      /* no callback function when failed */
 
         /* Allocate buffer to perform I/O filtering on and copy image into
          * it.  Must do this as H5Z_pipeline() may re-size the buffer 
@@ -1684,17 +1674,17 @@ H5HF__cache_dblock_verify_chksum(const void *_image, size_t len, void *_udata)
         if(NULL == (read_buf = H5MM_malloc(len)))
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "memory allocation failed for pipeline buffer")
 
-	/* Set up parameters for filter pipeline */
-	nbytes = len;
-	filter_mask = udata->filter_mask;
+        /* Set up parameters for filter pipeline */
+        nbytes = len;
+        filter_mask = udata->filter_mask;
         HDmemcpy(read_buf, image, len);
 
-	/* Push direct block data through I/O filter pipeline */
-	if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
-	    HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, FAIL, "output pipeline failed")
+        /* Push direct block data through I/O filter pipeline */
+        if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, FAIL, "output pipeline failed")
 
         /* Update info about direct block */
-	udata->decompressed = TRUE;
+        udata->decompressed = TRUE;
         len = nbytes;
     } /* end if */
     else
@@ -1820,45 +1810,49 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
             udata->dblk = NULL;
         } /* end if */
         else {
-            H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+            H5Z_cb_t filter_cb;     /* Filter callback structure */
             size_t nbytes;          /* Number of bytes used in buffer, after applying reverse filters */
             unsigned filter_mask;   /* Excluded filters for direct block */
 
             /* Sanity check */
-	    HDassert(udata->dblk == NULL);
+            HDassert(udata->dblk == NULL);
+
+            /* Initialize the filter callback struct */
+            filter_cb.op_data = NULL;
+            filter_cb.func = NULL;      /* no callback function when failed */
 
-	    /* Allocate buffer to perform I/O filtering on and copy image into
-	     * it.  Must do this as H5Z_pipeline() may resize the buffer 
-	     * provided to it.
-	     */
-	    if(NULL == (read_buf = H5MM_malloc(len)))
-		HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, NULL, "memory allocation failed for pipeline buffer")
+            /* Allocate buffer to perform I/O filtering on and copy image into
+             * it.  Must do this as H5Z_pipeline() may resize the buffer 
+             * provided to it.
+             */
+            if (NULL == (read_buf = H5MM_malloc(len)))
+                HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, NULL, "memory allocation failed for pipeline buffer")
 
             /* Copy compressed image into buffer */
-	    HDmemcpy(read_buf, image, len);
+            HDmemcpy(read_buf, image, len);
 
-	    /* Push direct block data through I/O filter pipeline */
-	    nbytes = len;
-	    filter_mask = udata->filter_mask;
-	    if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
-		HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, NULL, "output pipeline failed")
+            /* Push direct block data through I/O filter pipeline */
+            nbytes = len;
+            filter_mask = udata->filter_mask;
+            if (H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
+                HGOTO_ERROR(H5E_HEAP, H5E_CANTFILTER, NULL, "output pipeline failed")
 
-	    /* Sanity check */
-	    HDassert(nbytes == dblock->size);
+            /* Sanity check */
+            HDassert(nbytes == dblock->size);
 
-	    /* Copy un-filtered data into block's buffer */
-	    HDmemcpy(dblock->blk, read_buf, dblock->size);
-	} /* end if */
+            /* Copy un-filtered data into block's buffer */
+            HDmemcpy(dblock->blk, read_buf, dblock->size);
+        } /* end if */
     } /* end if */
     else {
         /* Sanity checks */
-	HDassert(udata->dblk == NULL);
-	HDassert(!udata->decompressed);
+        HDassert(udata->dblk == NULL);
+        HDassert(!udata->decompressed);
 
-	/* Allocate block buffer */
-/* XXX: Change to using free-list factories */
-	if(NULL == (dblock->blk = H5FL_BLK_MALLOC(direct_block, (size_t)dblock->size)))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        /* Allocate block buffer */
+        /* XXX: Change to using free-list factories */
+        if  (NULL == (dblock->blk = H5FL_BLK_MALLOC(direct_block, (size_t)dblock->size)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
         /* Copy image to dblock->blk */
         HDassert(dblock->size == len);
@@ -1884,7 +1878,10 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
 
     /* Address of parent block */
     dblock->parent = par_info->iblock;
-    dblock->fd_parent = par_info->iblock;
+    if(par_info->iblock)
+        dblock->fd_parent = par_info->iblock;
+    else
+        dblock->fd_parent = par_info->hdr;
     dblock->par_entry = par_info->entry;
     if(dblock->parent) {
         /* Share parent block */
@@ -1897,9 +1894,9 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
 
     /* Decode checksum on direct block, if requested */
     if(hdr->checksum_dblocks) {
-	uint32_t stored_chksum;         /* Metadata checksum value */
+        uint32_t stored_chksum;         /* Metadata checksum value */
 
-	/* checksum verification already done in verify_chksum cb */
+        /* checksum verification already done in verify_chksum cb */
 
         /* Metadata checksum */
         UINT32DECODE(image, stored_chksum);
@@ -2074,7 +2071,7 @@ H5HF__cache_dblock_image_len(const void *_thing, size_t *image_len)
  *-------------------------------------------------------------------------
  */
 static herr_t 
-H5HF__cache_dblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
+H5HF__cache_dblock_pre_serialize(H5F_t *f, void *_thing,
     haddr_t addr, size_t len, haddr_t *new_addr, size_t *new_len, unsigned *flags)
 {
     hbool_t 		 at_tmp_addr;  /* Flag to indicate direct block is */
@@ -2190,10 +2187,14 @@ H5HF__cache_dblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
 
     /* Check for I/O filters on this heap */
     if(hdr->filter_len > 0) {
-        H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        H5Z_cb_t filter_cb;                 /* Filter callback structure */
         size_t nbytes;                      /* Number of bytes used */
         unsigned filter_mask = 0;           /* Filter mask for block */
 
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;      /* no callback function when failed */
+
         /* Allocate buffer to perform I/O filtering on */
         write_size = dblock->size;
         if(NULL == (write_buf = H5MM_malloc(write_size)))
@@ -2247,11 +2248,11 @@ H5HF__cache_dblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
                  */
                 if(!at_tmp_addr)
                     /* Release direct block's current disk space */
-                    if(H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, addr, (hsize_t)hdr->pline_root_direct_size) < 0)
+                    if(H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, addr, (hsize_t)hdr->pline_root_direct_size) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap direct block")
 
                 /* Allocate space for the compressed direct block */
-                if(HADDR_UNDEF == (dblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, (hsize_t)write_size)))
+                if(HADDR_UNDEF == (dblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_DBLOCK, (hsize_t)write_size)))
                     HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap direct block")
 
                 /* Update information about compressed direct block's 
@@ -2299,11 +2300,11 @@ H5HF__cache_dblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
                  */
                 if(!at_tmp_addr)
                     /* Release direct block's current disk space */
-                    if(H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, addr, (hsize_t)par_iblock->filt_ents[par_entry].size) < 0)
+                    if(H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, addr, (hsize_t)par_iblock->filt_ents[par_entry].size) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap direct block")
 
                 /* Allocate space for the compressed direct block */
-                if(HADDR_UNDEF == (dblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, (hsize_t)write_size)))
+                if(HADDR_UNDEF == (dblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_DBLOCK, (hsize_t)write_size)))
                     HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap direct block")
 
                 /* Update information about compressed direct block's 
@@ -2343,7 +2344,7 @@ H5HF__cache_dblock_pre_serialize(H5F_t *f, hid_t dxpl_id, void *_thing,
          */
         if(at_tmp_addr) {
             /* Allocate 'normal' space for the direct block */
-            if(HADDR_UNDEF == (dblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, (hsize_t)write_size)))
+            if(HADDR_UNDEF == (dblock_addr = H5MF_alloc((H5F_t *)f, H5FD_MEM_FHEAP_DBLOCK, (hsize_t)write_size)))
                 HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap direct block")
 
             /* Check for root direct block */
@@ -2502,23 +2503,14 @@ H5HF__cache_dblock_notify(H5AC_notify_action_t action, void *_thing)
     HDassert(dblock->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
     HDassert(dblock->cache_info.type == H5AC_FHEAP_DBLOCK);
     HDassert(dblock->hdr);
-    HDassert((dblock->fd_parent) ||
-             ((dblock->hdr->man_dtable.curr_root_rows == 0) && (dblock->block_off == (hsize_t)0)));
 
     switch(action) {
         case H5AC_NOTIFY_ACTION_AFTER_INSERT:
         case H5AC_NOTIFY_ACTION_AFTER_LOAD:
-            HDassert(dblock->parent == dblock->fd_parent);
-            if(dblock->parent) {        /* this is a leaf dblock */
-                /* create flush dependency with parent iblock */
-                if(H5AC_create_flush_dependency(dblock->parent, dblock) < 0)
+            /* Create flush dependency with parent, if there is one */
+            if(dblock->fd_parent)
+                if(H5AC_create_flush_dependency(dblock->fd_parent, dblock) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
-            } /* end if */
-            else {      /* this is a root dblock */
-                /* create flush dependency with header */
-                if(H5AC_create_flush_dependency(dblock->hdr, dblock) < 0)
-                    HGOTO_ERROR(H5E_HEAP, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
-            } /* end else */
             break;
 
 	case H5AC_NOTIFY_ACTION_AFTER_FLUSH:
@@ -2532,18 +2524,12 @@ H5HF__cache_dblock_notify(H5AC_notify_action_t action, void *_thing)
 	    break;
 
         case H5AC_NOTIFY_ACTION_BEFORE_EVICT:
-            HDassert((dblock->parent == dblock->fd_parent) ||
-                     ((NULL == dblock->parent) && (dblock->fd_parent)));
-            if(dblock->fd_parent) {     /* this is a leaf dblock */
-                /* destroy flush dependency with parent iblock */
+            if(dblock->fd_parent) {
+                /* Destroy flush dependency with parent */
                 if(H5AC_destroy_flush_dependency(dblock->fd_parent, dblock) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
+                dblock->fd_parent = NULL;
             } /* end if */
-            else {      /* this is a root dblock */
-                /* destroy flush dependency with header */
-                if(H5AC_destroy_flush_dependency(dblock->hdr, dblock) < 0)
-                    HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
-            } /* end else */
             break;
 
         default:
@@ -2596,6 +2582,42 @@ done:
 } /* end H5HF__cache_dblock_free_icr() */
 
 
+/*-------------------------------------------------------------------------
+ * Function:	H5HF__cache_dblock_fsf_size
+ *
+ * Purpose:     Tell the metadata cache the actual amount of file space
+ *              to free when a dblock entry is destroyed with the free
+ *              file space flag set.
+ *
+ * Return:	Success:	SUCCEED
+ *		Failure:	FAIL
+ *
+ * Programmer:	Quincey Koziol
+ *		1/5/18
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t 
+H5HF__cache_dblock_fsf_size(const void *_thing, hsize_t *fsf_size)
+{
+    const H5HF_direct_t *dblock = (const H5HF_direct_t *)_thing;      /* Fractal heap direct block */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Sanity checks */
+    HDassert(dblock);
+    HDassert(dblock->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
+    HDassert(dblock->cache_info.type == H5AC_FHEAP_DBLOCK);
+    HDassert(dblock->file_size > 0);
+    HDassert(fsf_size);
+
+    /* Set free space in file size */
+    *fsf_size = dblock->file_size;
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5HF__cache_dblock_fsf_size() */
+
+
 /*------------------------------------------------------------------------
  * Function:	H5HF__cache_verify_hdr_descendants_clean
  *
@@ -2661,8 +2683,8 @@ done:
  */
 #ifndef NDEBUG
 static herr_t
-H5HF__cache_verify_hdr_descendants_clean(H5F_t *f, hid_t dxpl_id,
-    H5HF_hdr_t *hdr, hbool_t *fd_clean, hbool_t *clean)
+H5HF__cache_verify_hdr_descendants_clean(H5F_t *f, H5HF_hdr_t *hdr,
+    hbool_t *fd_clean, hbool_t *clean)
 {
     hbool_t     fd_exists = FALSE;      /* whether flush dependency exists. */
     haddr_t	hdr_addr;               /* Address of header */
@@ -2783,19 +2805,19 @@ H5HF__cache_verify_hdr_descendants_clean(H5F_t *f, hid_t dxpl_id,
                      * in this case, since we know that the entry is in cache,
                      * we can pass NULL udata.
                      *
-                     * The tag specified in the dxpl we received
-                     * as a parameter (via dxpl_id) may not be correct.
+                     * The tag specified in the API context we received
+                     * as a parameter (via API context) may not be correct.
                      * Grab the (hopefully) correct tag from the header,
-                     * and load it into the dxpl via the H5_BEGIN_TAG and 
+                     * and load it into the API context via the H5_BEGIN_TAG and 
                      * H5_END_TAG macros.  Note that any error bracked by
                      * these macros must be reported with HGOTO_ERROR_TAG. 
                      */
-                    H5_BEGIN_TAG(dxpl_id, hdr->heap_addr, FAIL)
+                    H5_BEGIN_TAG(hdr->heap_addr)
 
-                    if(NULL == (root_iblock = (H5HF_indirect_t *)H5AC_protect(f, dxpl_id, H5AC_FHEAP_IBLOCK, root_iblock_addr, NULL, H5AC__READ_ONLY_FLAG)))
+                    if(NULL == (root_iblock = (H5HF_indirect_t *)H5AC_protect(f, H5AC_FHEAP_IBLOCK, root_iblock_addr, NULL, H5AC__READ_ONLY_FLAG)))
                         HGOTO_ERROR_TAG(H5E_HEAP, H5E_CANTPROTECT, FAIL, "H5AC_protect() faild.")
 
-                    H5_END_TAG(FAIL)
+                    H5_END_TAG
 
                     unprotect_root_iblock = TRUE;
                 } /* end if */
@@ -2857,19 +2879,19 @@ H5HF__cache_verify_hdr_descendants_clean(H5F_t *f, hid_t dxpl_id,
                      * in this case, since we know that the entry is in cache,
                      * we can pass NULL udata.
                      *
-                     * The tag associated specified in the dxpl we received
-                     * as a parameter (via dxpl_id) may not be correct.
+                     * The tag associated specified in the API context we received
+                     * as a parameter (via API context) may not be correct.
                      * Grab the (hopefully) correct tag from the header,
-                     * and load it into the dxpl via the H5_BEGIN_TAG and 
+                     * and load it into the API context via the H5_BEGIN_TAG and 
                      * H5_END_TAG macros.  Note that any error bracked by
                      * these macros must be reported with HGOTO_ERROR_TAG. 
                      */
-                    H5_BEGIN_TAG(dxpl_id, hdr->heap_addr, FAIL)
+                    H5_BEGIN_TAG(hdr->heap_addr)
 
-                    if(NULL == (iblock = (H5HF_indirect_t *)H5AC_protect(f, dxpl_id, H5AC_FHEAP_IBLOCK, root_iblock_addr, NULL, H5AC__READ_ONLY_FLAG)))
+                    if(NULL == (iblock = (H5HF_indirect_t *)H5AC_protect(f, H5AC_FHEAP_IBLOCK, root_iblock_addr, NULL, H5AC__READ_ONLY_FLAG)))
                         HGOTO_ERROR_TAG(H5E_HEAP, H5E_CANTPROTECT, FAIL, "H5AC_protect() faild.")
 
-                    H5_END_TAG(FAIL)
+                    H5_END_TAG
 
                     unprotect_root_iblock = TRUE;
                     HDassert(iblock == root_iblock);
@@ -2883,13 +2905,13 @@ H5HF__cache_verify_hdr_descendants_clean(H5F_t *f, hid_t dxpl_id,
              HDassert(root_iblock->cache_info.magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
              HDassert(root_iblock->cache_info.type == H5AC_FHEAP_IBLOCK);
 
-             if(H5HF__cache_verify_iblock_descendants_clean(f, dxpl_id, hdr->heap_addr, root_iblock, &root_iblock_status, fd_clean, clean) < 0)
+             if(H5HF__cache_verify_iblock_descendants_clean(f, hdr->heap_addr, root_iblock, &root_iblock_status, fd_clean, clean) < 0)
                  HGOTO_ERROR(H5E_HEAP, H5E_SYSTEM, FAIL, "can't verify root iblock & descendants clean.")
 
              /* Unprotect the root indirect block if required */
              if(unprotect_root_iblock) {
                 HDassert(root_iblock);
-                if(H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_IBLOCK, root_iblock_addr, root_iblock, H5AC__NO_FLAGS_SET) < 0)
+                if(H5AC_unprotect(f, H5AC_FHEAP_IBLOCK, root_iblock_addr, root_iblock, H5AC__NO_FLAGS_SET) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "H5AC_unprotect() faild.")
             } /* end if */
         } /* end else */
@@ -3026,9 +3048,9 @@ done:
  */
 #ifndef NDEBUG
 static herr_t
-H5HF__cache_verify_iblock_descendants_clean(H5F_t *f, hid_t dxpl_id,
-    haddr_t fd_parent_addr, H5HF_indirect_t *iblock, unsigned *iblock_status, 
-    hbool_t * fd_clean, hbool_t *clean)
+H5HF__cache_verify_iblock_descendants_clean(H5F_t *f, haddr_t fd_parent_addr,
+    H5HF_indirect_t *iblock, unsigned *iblock_status, hbool_t * fd_clean,
+    hbool_t *clean)
 {
     hbool_t	has_dblocks = FALSE;
     hbool_t	has_iblocks = FALSE;
@@ -3050,7 +3072,7 @@ H5HF__cache_verify_iblock_descendants_clean(H5F_t *f, hid_t dxpl_id,
     if((*fd_clean) && H5HF__cache_verify_iblocks_dblocks_clean(f, fd_parent_addr, iblock, fd_clean, clean, &has_dblocks) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_SYSTEM, FAIL, "can't verify dblocks clean.")
 
-    if((*fd_clean) && H5HF__cache_verify_descendant_iblocks_clean(f, dxpl_id, fd_parent_addr, iblock, fd_clean, clean, &has_iblocks) < 0)
+    if((*fd_clean) && H5HF__cache_verify_descendant_iblocks_clean(f, fd_parent_addr, iblock, fd_clean, clean, &has_iblocks) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_SYSTEM, FAIL, "can't verify iblocks clean.")
 
     /* verify that flush dependency setup is plausible */
@@ -3308,9 +3330,9 @@ done:
  */
 #ifndef NDEBUG
 static herr_t
-H5HF__cache_verify_descendant_iblocks_clean(H5F_t *f, hid_t dxpl_id,
-    haddr_t fd_parent_addr, H5HF_indirect_t *iblock, hbool_t *fd_clean,
-    hbool_t *clean, hbool_t *has_iblocks)
+H5HF__cache_verify_descendant_iblocks_clean(H5F_t *f, haddr_t fd_parent_addr,
+    H5HF_indirect_t *iblock, hbool_t *fd_clean, hbool_t *clean,
+    hbool_t *has_iblocks)
 {
     unsigned	      first_iblock_index;
     unsigned	      last_iblock_index;
@@ -3432,23 +3454,23 @@ H5HF__cache_verify_descendant_iblocks_clean(H5F_t *f, hid_t dxpl_id,
                             /* in this case, since we know that the      */
                             /* entry is in cache, we can pass NULL udata */
                             /*                                           */
-                            /* The tag associated specified in the dxpl  */
-                            /* we received as a parameter (via dxpl_id)  */
+                            /* The tag associated specified in the API context  */
+                            /* we received as a parameter (via API context)  */
                             /* may not be correct.                       */
                             /*                                           */
                             /* Grab the (hopefully) correct tag from the */
-                            /* parent iblock, and load it into the dxpl  */
+                            /* parent iblock, and load it into the API context  */
                             /* via the H5_BEGIN_TAG and H5_END_TAG       */
                             /* macros.  Note that any error bracked by   */
                             /* these macros must be reported with        */
                             /* HGOTO_ERROR_TAG.                          */
 
-                            H5_BEGIN_TAG(dxpl_id, iblock->hdr->heap_addr, FAIL)
+                            H5_BEGIN_TAG(iblock->hdr->heap_addr)
 
-                            if(NULL == (child_iblock = (H5HF_indirect_t *) H5AC_protect(f, dxpl_id, H5AC_FHEAP_IBLOCK, child_iblock_addr, NULL, H5AC__READ_ONLY_FLAG)))
+                            if(NULL == (child_iblock = (H5HF_indirect_t *) H5AC_protect(f, H5AC_FHEAP_IBLOCK, child_iblock_addr, NULL, H5AC__READ_ONLY_FLAG)))
                                 HGOTO_ERROR_TAG(H5E_HEAP, H5E_CANTPROTECT, FAIL, "H5AC_protect() faild.")
 
-                            H5_END_TAG(FAIL)
+                            H5_END_TAG
 
                             unprotect_child_iblock = TRUE;
                         } /* end if */
@@ -3479,7 +3501,7 @@ H5HF__cache_verify_descendant_iblocks_clean(H5F_t *f, hid_t dxpl_id,
                     HDassert(child_iblock->addr == child_iblock_addr);
 
                     /* now make the recursive call */
-                    if(H5HF__cache_verify_iblock_descendants_clean(f, dxpl_id, fd_parent_addr, child_iblock, &child_iblock_status, fd_clean, clean) < 0)
+                    if(H5HF__cache_verify_iblock_descendants_clean(f, fd_parent_addr, child_iblock, &child_iblock_status, fd_clean, clean) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_SYSTEM, FAIL, "can't verify child iblock clean.")
 
                     /* if iblock_addr != fd_parent_addr, verify that a flush 
@@ -3496,7 +3518,7 @@ H5HF__cache_verify_descendant_iblocks_clean(H5F_t *f, hid_t dxpl_id,
 
                     /* if we protected the child iblock, unprotect it now */
                     if(unprotect_child_iblock) {
-                        if(H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_IBLOCK, child_iblock_addr, child_iblock, H5AC__NO_FLAGS_SET) < 0)
+                        if(H5AC_unprotect(f, H5AC_FHEAP_IBLOCK, child_iblock_addr, child_iblock, H5AC__NO_FLAGS_SET) < 0)
                             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "H5AC_unprotect() faild.")
                     } /* end if */
                 } /* end if */
diff --git a/src/H5HFdbg.c b/src/H5HFdbg.c
index 40191e5..70dfeed 100644
--- a/src/H5HFdbg.c
+++ b/src/H5HFdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -113,7 +111,7 @@ static herr_t H5HF_dtable_debug(const H5HF_dtable_t *dtable, FILE *stream,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_id_print(H5HF_t *fh, hid_t dxpl_id, const void *_id, FILE *stream, int indent, int fwidth)
+H5HF_id_print(H5HF_t *fh, const void *_id, FILE *stream, int indent, int fwidth)
 {
     const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
     uint8_t id_flags;                   /* Heap ID flag bits */
@@ -156,11 +154,11 @@ HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "heap ID type not supported yet")
     } /* end else */
 
     /* Get the length of the heap object */
-    if(H5HF_get_obj_len(fh, dxpl_id, id, &obj_len) < 0)
+    if(H5HF_get_obj_len(fh, id, &obj_len) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't retrieve heap ID length")
 
     /* Get the offset of the heap object */
-    if(H5HF_get_obj_off(fh, dxpl_id, id, &obj_off) < 0)
+    if(H5HF_get_obj_off(fh, id, &obj_off) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't retrieve heap ID length")
 
     /* Display the heap ID */
@@ -259,7 +257,7 @@ H5HF_dtable_debug(const H5HF_dtable_t *dtable, FILE *stream, int indent, int fwi
  *-------------------------------------------------------------------------
  */
 void
-H5HF_hdr_print(const H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t dump_internal, FILE *stream, int indent, int fwidth)
+H5HF_hdr_print(const H5HF_hdr_t *hdr, hbool_t dump_internal, FILE *stream, int indent, int fwidth)
 {
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -343,8 +341,7 @@ H5HF_hdr_print(const H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t dump_internal, FILE
                       "Filter mask for root direct block:",
                       hdr->pline_root_direct_filter_mask);
         } /* end if */
-        H5O_debug_id(H5O_PLINE_ID, hdr->f, dxpl_id, &(hdr->pline), stream,
-                             indent + 3, MAX(0, fwidth - 3));
+        H5O_debug_id(H5O_PLINE_ID, hdr->f, &(hdr->pline), stream, indent + 3, MAX(0, fwidth - 3));
     } /* end if */
 
     /* Print internal (runtime) information, if requested */
@@ -380,7 +377,7 @@ H5HF_hdr_print(const H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t dump_internal, FILE
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth)
+H5HF_hdr_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth)
 {
     H5HF_hdr_t	*hdr = NULL;             /* Fractal heap header info */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -397,14 +394,14 @@ H5HF_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(fwidth >= 0);
 
     /* Load the fractal heap header */
-    if(NULL == (hdr = H5HF_hdr_protect(f, dxpl_id, addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5HF__hdr_protect(f, addr, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap header")
 
     /* Print the information about the heap's header */
-    H5HF_hdr_print(hdr, dxpl_id, FALSE, stream, indent, fwidth);
+    H5HF_hdr_print(hdr, FALSE, stream, indent, fwidth);
 
 done:
-    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5AC_unprotect(f, H5AC_FHEAP_HDR, addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -509,8 +506,8 @@ H5HF_dblock_debug_cb(H5FS_section_info_t *_sect, void *_udata)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
-    int indent, int fwidth, haddr_t hdr_addr, size_t block_size)
+H5HF_dblock_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth,
+    haddr_t hdr_addr, size_t block_size)
 {
     H5HF_hdr_t	*hdr = NULL;            /* Fractal heap header info */
     H5HF_direct_t *dblock = NULL;       /* Fractal heap direct block info */
@@ -533,13 +530,13 @@ H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
     HDassert(block_size > 0);
 
     /* Load the fractal heap header */
-    if(NULL == (hdr = H5HF_hdr_protect(f, dxpl_id, hdr_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5HF__hdr_protect(f, hdr_addr, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap header")
 
     /*
      * Load the heap direct block
      */
-    if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, addr, block_size, NULL, 0, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (dblock = H5HF__man_dblock_protect(hdr, addr, block_size, NULL, 0, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to load fractal heap direct block")
 
     /* Print opening message */
@@ -564,7 +561,7 @@ H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
     /* Initialize the free space information for the heap */
-    if(H5HF_space_start(hdr, dxpl_id, FALSE) < 0)
+    if(H5HF__space_start(hdr, FALSE) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize heap free space")
 
     /* If there is a free space manager for the heap, check for sections that overlap this block */
@@ -585,11 +582,11 @@ H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
         HDfprintf(stream, "%*sFree Blocks (offset, size):\n", indent, "");
 
         /* Iterate over the free space sections, to detect overlaps with this block */
-        if(H5FS_sect_iterate(f, dxpl_id, hdr->fspace, H5HF_dblock_debug_cb, &udata) < 0)
+        if(H5FS_sect_iterate(f, hdr->fspace, H5HF_dblock_debug_cb, &udata) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_BADITER, FAIL, "can't iterate over heap's free space")
 
         /* Close the free space information */
-        if(H5HF_space_close(hdr, dxpl_id) < 0)
+        if(H5HF__space_close(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release free space info")
 
         /* Keep the amount of space free */
@@ -612,9 +609,9 @@ H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
     H5_buffer_dump(stream, indent, dblock->blk, marker, (size_t)0, dblock->size);
 
 done:
-    if(dblock && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_DBLOCK, addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+    if(dblock && H5AC_unprotect(f, H5AC_FHEAP_DBLOCK, addr, dblock, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap direct block")
-    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5AC_unprotect(f, H5AC_FHEAP_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header")
     H5MM_xfree(marker);
 
@@ -768,8 +765,8 @@ H5HF_iblock_print(const H5HF_indirect_t *iblock,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
-    int indent, int fwidth, haddr_t hdr_addr, unsigned nrows)
+H5HF_iblock_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth,
+    haddr_t hdr_addr, unsigned nrows)
 {
     H5HF_hdr_t	*hdr = NULL;            /* Fractal heap header info */
     H5HF_indirect_t *iblock = NULL;     /* Fractal heap direct block info */
@@ -790,22 +787,22 @@ H5HF_iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream,
     HDassert(nrows > 0);
 
     /* Load the fractal heap header */
-    if(NULL == (hdr = H5HF_hdr_protect(f, dxpl_id, hdr_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5HF__hdr_protect(f, hdr_addr, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap header")
 
     /*
      * Load the heap indirect block
      */
-    if(NULL == (iblock = H5HF_man_iblock_protect(hdr, dxpl_id, addr, nrows, NULL, 0, FALSE, H5AC__READ_ONLY_FLAG, &did_protect)))
+    if(NULL == (iblock = H5HF__man_iblock_protect(hdr, addr, nrows, NULL, 0, FALSE, H5AC__READ_ONLY_FLAG, &did_protect)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to load fractal heap indirect block")
 
     /* Print the information about the heap's indirect block */
     H5HF_iblock_print(iblock, FALSE, stream, indent, fwidth);
 
 done:
-    if(iblock && H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+    if(iblock && H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap direct block")
-    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5AC_unprotect(f, H5AC_FHEAP_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -881,8 +878,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr,
-    FILE *stream, int indent, int fwidth)
+H5HF_sects_debug(H5F_t *f, haddr_t fh_addr, FILE *stream, int indent,
+    int fwidth)
 {
     H5HF_hdr_t	*hdr = NULL;            /* Fractal heap header info */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -899,11 +896,11 @@ H5HF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr,
     HDassert(fwidth >= 0);
 
     /* Load the fractal heap header */
-    if(NULL == (hdr = H5HF_hdr_protect(f, dxpl_id, fh_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (hdr = H5HF__hdr_protect(f, fh_addr, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap header")
 
     /* Initialize the free space information for the heap */
-    if(H5HF_space_start(hdr, dxpl_id, FALSE) < 0)
+    if(H5HF__space_start(hdr, FALSE) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize heap free space")
 
     /* If there is a free space manager for the heap, iterate over them */
@@ -917,16 +914,16 @@ H5HF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr,
         udata.fwidth = fwidth;
 
         /* Iterate over all the free space sections */
-        if(H5FS_sect_iterate(f, dxpl_id, hdr->fspace, H5HF_sects_debug_cb, &udata) < 0)
+        if(H5FS_sect_iterate(f, hdr->fspace, H5HF_sects_debug_cb, &udata) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_BADITER, FAIL, "can't iterate over heap's free space")
 
         /* Close the free space information */
-        if(H5HF_space_close(hdr, dxpl_id) < 0)
+        if(H5HF__space_close(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release free space info")
     } /* end if */
 
 done:
-    if(hdr && H5AC_unprotect(f, dxpl_id, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(hdr && H5AC_unprotect(f, H5AC_FHEAP_HDR, fh_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release fractal heap header")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5HFdblock.c b/src/H5HFdblock.c
index b34534c..a6560e2 100644
--- a/src/H5HFdblock.c
+++ b/src/H5HFdblock.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -81,7 +79,7 @@ H5FL_DEFINE(H5HF_direct_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_dblock_create
+ * Function:	H5HF__man_dblock_create
  *
  * Purpose:	Allocate & initialize a managed direct block
  *
@@ -94,7 +92,7 @@ H5FL_DEFINE(H5HF_direct_t);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_dblock_create(hid_t dxpl_id, H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblock,
+H5HF__man_dblock_create(H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblock,
     unsigned par_entry, haddr_t *addr_p, H5HF_free_section_t **ret_sec_node)
 {
     H5HF_free_section_t *sec_node; /* Pointer to free space section for block */
@@ -103,7 +101,7 @@ H5HF_man_dblock_create(hid_t dxpl_id, H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblo
     size_t free_space;                  /* Free space in new block */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -157,16 +155,19 @@ H5HF_man_dblock_create(hid_t dxpl_id, H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblo
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap direct block")
     } /* end if */
     else {
-        if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, (hsize_t)dblock->size)))
+        if(HADDR_UNDEF == (dblock_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_DBLOCK, (hsize_t)dblock->size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap direct block")
     } /* end else */
 
     /* Attach to parent indirect block, if there is one */
     dblock->parent = par_iblock;
-    dblock->fd_parent = par_iblock;
-    if(dblock->parent)
+    if(dblock->parent) {
         if(H5HF_man_iblock_attach(dblock->parent, par_entry, dblock_addr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't attach direct block to parent indirect block")
+        dblock->fd_parent = par_iblock;
+    } /* end if */
+    else
+        dblock->fd_parent = hdr;
     dblock->par_entry = par_entry;
 
     /* Create a new 'single' section for the free space in the block */
@@ -180,12 +181,12 @@ H5HF_man_dblock_create(hid_t dxpl_id, H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblo
         *ret_sec_node = sec_node;
     else {
         /* Add new free space to the heap's list of space */
-        if(H5HF_space_add(hdr, dxpl_id, sec_node, 0) < 0)
+        if(H5HF__space_add(hdr, sec_node, 0) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add direct block free space to global list")
     } /* end else */
 
     /* Cache the new fractal heap direct block */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add fractal heap direct block to cache")
 
     /* Increase the allocated heap size */
@@ -203,11 +204,11 @@ done:
                 HDONE_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to destroy fractal heap direct block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_dblock_create() */
+} /* end H5HF__man_dblock_create() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_dblock_destroy
+ * Function:	H5HF__man_dblock_destroy
  *
  * Purpose:	Destroy a managed direct block
  *
@@ -224,14 +225,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_direct_t *dblock,
-    haddr_t dblock_addr)
+H5HF__man_dblock_destroy(H5HF_hdr_t *hdr, H5HF_direct_t *dblock,
+    haddr_t dblock_addr, hbool_t *parent_removed)
 {
     hsize_t dblock_size;                /* Size of direct block on disk */
     unsigned cache_flags = H5AC__NO_FLAGS_SET;      /* Flags for unprotecting indirect block */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -260,6 +261,10 @@ H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_direct_t *dblock,
     else
         dblock_size = (hsize_t)dblock->size;
 
+    /* Reset the parent_removed flag */
+    if(parent_removed)
+        *parent_removed = FALSE;
+
     /* Check for root direct block */
     if(hdr->man_dtable.curr_root_rows == 0) {
         /* Sanity check */
@@ -269,11 +274,8 @@ H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_direct_t *dblock,
         /* Sanity check block iterator */
         HDassert(!H5HF_man_iter_ready(&hdr->next_block));
 
-        /* Reset root pointer information */
-        hdr->man_dtable.table_addr = HADDR_UNDEF;
-
         /* Reset header information back to "empty heap" state */
-        if(H5HF_hdr_empty(hdr) < 0)
+        if(H5HF__hdr_empty(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't make heap empty")
     } /* end if */
     else {
@@ -281,36 +283,32 @@ H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_direct_t *dblock,
         hdr->man_alloc_size -= dblock->size;
 
         /* Check for this direct block being the highest in the heap */
-        if((dblock->block_off + dblock->size) == hdr->man_iter_off) {
+        if((dblock->block_off + dblock->size) == hdr->man_iter_off)
             /* Move 'next block' iterator backwards (may shrink heap) */
-            if(H5HF_hdr_reverse_iter(hdr, dxpl_id, dblock_addr) < 0)
+            if(H5HF__hdr_reverse_iter(hdr, dblock_addr) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't reverse 'next block' iterator")
-        } /* end if */
-#if 0
-        else {
-            unsigned par_row, par_col;  /* Row & column in parent indirect block */
-
-            /* Compute row & column in parent indirect block */
-            par_row = dblock->par_entry / hdr->man_dtable.cparam.width;
-            par_col = dblock->par_entry % hdr->man_dtable.cparam.width;
-
-            /* Add a 'range' section for the space in the destroyed block */
-            if(H5HF_sect_range_add(hdr, dxpl_id, dblock->block_off, hdr->man_dtable.row_tot_dblock_free[par_row],
-                    dblock->parent, par_row, par_col, 1) < 0)
-                HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "can't create range section for direct block being destroyed")
-        } /* end else */
-#endif /* 0 */
 
         /* Detach from parent indirect block */
         if(dblock->parent) {
-            if(H5HF_man_iblock_detach(dblock->parent, dxpl_id, dblock->par_entry) < 0)
+            /* Destroy flush dependency between direct block and parent */
+            if(H5AC_destroy_flush_dependency(dblock->fd_parent, dblock) < 0)
+                HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
+            dblock->fd_parent = NULL;
+
+            /* If this is the last direct block for the indirect block, the
+             *  indirect block will be removed when this direct block is detached
+             */
+            if(parent_removed && 1 == dblock->parent->nchildren)
+                *parent_removed = TRUE;
+
+            if(H5HF__man_iblock_detach(dblock->parent, dblock->par_entry) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't detach from parent indirect block");
             dblock->parent = NULL;
             dblock->par_entry = 0;
         } /* end if */
     } /* end else */
 
-    /* Indicate that the indirect block should be deleted */
+    /* Indicate that the direct block should be deleted */
     dblock->file_size = dblock_size;
     cache_flags |= H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG;
 
@@ -320,15 +318,15 @@ H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_direct_t *dblock,
 
 done:
     /* Unprotect the indirect block, with appropriate flags */
-    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, cache_flags) < 0)
+    if(H5AC_unprotect(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, cache_flags) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap direct block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_dblock_destroy() */
+} /* end H5HF__man_dblock_destroy() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_dblock_new
+ * Function:	H5HF__man_dblock_new
  *
  * Purpose:	Create a direct block large enough to hold an object of
  *              the requested size
@@ -342,14 +340,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_dblock_new(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t request,
+H5HF__man_dblock_new(H5HF_hdr_t *hdr, size_t request,
     H5HF_free_section_t **ret_sec_node)
 {
     haddr_t dblock_addr;            /* Address of new direct block */
     size_t min_dblock_size;         /* Min. size of direct block to allocate */
     herr_t ret_value = SUCCEED;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -373,7 +371,7 @@ H5HF_man_dblock_new(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t request,
     if(!H5F_addr_defined(hdr->man_dtable.table_addr) &&
             min_dblock_size == hdr->man_dtable.cparam.start_block_size) {
         /* Create new direct block at starting offset */
-        if(H5HF_man_dblock_create(dxpl_id, hdr, NULL, 0, &dblock_addr, ret_sec_node) < 0)
+        if(H5HF__man_dblock_create(hdr, NULL, 0, &dblock_addr, ret_sec_node) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap direct block")
 
         /* Point root at new direct block */
@@ -396,7 +394,7 @@ H5HF_man_dblock_new(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t request,
         size_t next_size;           /* Size of next direct block to create */
 
         /* Update iterator to reflect any previous increments as well as allow for requested direct block size */
-        if(H5HF_hdr_update_iter(hdr, dxpl_id, min_dblock_size) < 0)
+        if(H5HF__hdr_update_iter(hdr, min_dblock_size) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUPDATE, FAIL, "unable to update block iterator")
 
         /* Retrieve information about current iterator position */
@@ -416,17 +414,17 @@ HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "skipping direct block sizes not su
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, FAIL, "can't increment 'next block' iterator")
 
         /* Create new direct block at current location*/
-        if(H5HF_man_dblock_create(dxpl_id, hdr, iblock, next_entry, &dblock_addr, ret_sec_node) < 0)
+        if(H5HF__man_dblock_create(hdr, iblock, next_entry, &dblock_addr, ret_sec_node) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap direct block")
     } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_dblock_new() */
+} /* end H5HF__man_dblock_new() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_dblock_protect
+ * Function:	H5HF__man_dblock_protect
  *
  * Purpose:	Convenience wrapper around H5AC_protect on a direct block
  *              (Use H5AC_unprotect to unprotect it for now)
@@ -440,7 +438,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5HF_direct_t *
-H5HF_man_dblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr,
+H5HF__man_dblock_protect(H5HF_hdr_t *hdr, haddr_t dblock_addr,
     size_t dblock_size, H5HF_indirect_t *par_iblock, unsigned par_entry,
     unsigned flags)
 {
@@ -448,7 +446,7 @@ H5HF_man_dblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr,
     H5HF_dblock_cache_ud_t udata;	/* parent and other infor for deserializing direct block */
     H5HF_direct_t *ret_value = NULL;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -498,7 +496,7 @@ H5HF_man_dblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr,
     udata.dblk = NULL;
 
     /* Protect the direct block */
-    if(NULL == (dblock = (H5HF_direct_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, &udata, flags)))
+    if(NULL == (dblock = (H5HF_direct_t *)H5AC_protect(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, &udata, flags)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect fractal heap direct block")
 
     /* Set the return value */
@@ -506,11 +504,11 @@ H5HF_man_dblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_dblock_protect() */
+} /* end H5HF__man_dblock_protect() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_dblock_locate
+ * Function:	H5HF__man_dblock_locate
  *
  * Purpose:	Locate a direct block in a managed heap
  *
@@ -523,7 +521,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t obj_off,
+H5HF__man_dblock_locate(H5HF_hdr_t *hdr, hsize_t obj_off,
     H5HF_indirect_t **ret_iblock, unsigned *ret_entry, hbool_t *ret_did_protect,
     unsigned flags)
 {
@@ -534,7 +532,7 @@ H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t obj_off,
     unsigned entry;                 /* Entry of block */
     herr_t ret_value = SUCCEED;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -555,7 +553,7 @@ H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t obj_off,
     iblock_addr = hdr->man_dtable.table_addr;
 
     /* Lock root indirect block */
-    if(NULL == (iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, hdr->man_dtable.curr_root_rows, NULL, 0, FALSE, flags, &did_protect)))
+    if(NULL == (iblock = H5HF__man_iblock_protect(hdr, iblock_addr, hdr->man_dtable.curr_root_rows, NULL, 0, FALSE, flags, &did_protect)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
 
     /* Check for indirect block row */
@@ -577,7 +575,7 @@ H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t obj_off,
 
         /* Check if we need to (re-)create the child indirect block */
         if(!H5F_addr_defined(iblock_addr)) {
-            if(H5HF_man_iblock_create(hdr, dxpl_id, iblock, entry, nrows, nrows, &iblock_addr) < 0)
+            if(H5HF__man_iblock_create(hdr, iblock, entry, nrows, nrows, &iblock_addr) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap indirect block")
 
             /* Indicate that the parent indirect block was modified */
@@ -585,11 +583,11 @@ H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t obj_off,
         } /* end if */
 
         /* Lock child indirect block */
-        if(NULL == (new_iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, nrows, iblock, entry, FALSE, flags, &new_did_protect)))
+        if(NULL == (new_iblock = H5HF__man_iblock_protect(hdr, iblock_addr, nrows, iblock, entry, FALSE, flags, &new_did_protect)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
 
         /* Release the current indirect block */
-        if(H5HF_man_iblock_unprotect(iblock, dxpl_id, cache_flags, did_protect) < 0)
+        if(H5HF__man_iblock_unprotect(iblock, cache_flags, did_protect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
         /* Switch variables to use new indirect block */
@@ -610,17 +608,17 @@ H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t obj_off,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_dblock_locate() */
+} /* end H5HF__man_dblock_locate() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_dblock_delete
+ * Function:	H5HF__man_dblock_delete
  *
  * Purpose:	Delete a managed direct block
  *
  * Note:	This routine does _not_ modify any indirect block that points
  *              to this direct block, it is assumed that the whole heap is
- *              being deleted.  (H5HF_man_dblock_destroy modifies the indirect
+ *              being deleted.  (H5HF__man_dblock_destroy modifies the indirect
  *              block)
  *
  * Return:	SUCCEED/FAIL
@@ -632,19 +630,19 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_dblock_delete(H5F_t *f, hid_t dxpl_id, haddr_t dblock_addr,
-    hsize_t dblock_size)
+H5HF__man_dblock_delete(H5F_t *f, haddr_t dblock_addr, hsize_t dblock_size)
 {
     unsigned dblock_status = 0;         /* Direct block's status in the metadata cache */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
      */
     HDassert(f);
     HDassert(H5F_addr_defined(dblock_addr));
+    HDassert(dblock_size > 0);
 
     /* Check the direct block's status in the metadata cache */
     if(H5AC_get_entry_status(f, dblock_addr, &dblock_status) < 0)
@@ -657,13 +655,13 @@ H5HF_man_dblock_delete(H5F_t *f, hid_t dxpl_id, haddr_t dblock_addr,
         HDassert(!(dblock_status & H5AC_ES__IS_PROTECTED));
 
         /* Evict the direct block from the metadata cache */
-        if(H5AC_expunge_entry(f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_expunge_entry(f, H5AC_FHEAP_DBLOCK, dblock_addr, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "unable to remove direct block from cache")
     } /* end if */
 
     /* Check if the direct block is NOT currently allocated in temp. file space */
     /* (temp. file space does not need to be freed) */
-    if(!H5F_IS_TMP_ADDR(f, dblock_addr)) {
+    if(!H5F_IS_TMP_ADDR(f, dblock_addr))
         /* Release direct block's disk space */
         /* (XXX: Under the best of circumstances, this block's space in the file
          *          would be freed in the H5AC_expunge_entry() call above (and the
@@ -673,18 +671,14 @@ H5HF_man_dblock_delete(H5F_t *f, hid_t dxpl_id, haddr_t dblock_addr,
          *          "file_size" field for the direct block structure.  In order to
          *          do that, we'd have to protect/unprotect the direct block and
          *          that would add a bunch of unnecessary overhead to the process,
-         *          so we just release the file space here, directly.  When the
-         *          revised metadata cache is operating, it will "know" the file
-         *          size of each entry in the cache and we can the the
-         *          H5AC_expunge_entry() method.  -QAK)
+         *          so we just release the file space here, directly.  -QAK)
          */
-        if(H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, dxpl_id, dblock_addr, dblock_size) < 0)
-            HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap direct block")
-    } /* end if */
+        if(H5MF_xfree(f, H5FD_MEM_FHEAP_DBLOCK, dblock_addr, dblock_size) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap direct block file space")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_dblock_delete() */
+} /* end H5HF__man_dblock_delete() */
 
 
 /*-------------------------------------------------------------------------
@@ -717,7 +711,7 @@ H5HF_man_dblock_dest(H5HF_direct_t *dblock)
     if(H5HF_hdr_decr(dblock->hdr) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared heap header")
     if(dblock->parent)
-        if(H5HF_iblock_decr(dblock->parent) < 0)
+        if(H5HF__iblock_decr(dblock->parent) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
 
     /* Free block's buffer */
diff --git a/src/H5HFdtable.c b/src/H5HFdtable.c
index 3ceb6f5..563e8c5 100644
--- a/src/H5HFdtable.c
+++ b/src/H5HFdtable.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HFhdr.c b/src/H5HFhdr.c
index 42857c0..b1b8574 100644
--- a/src/H5HFhdr.c
+++ b/src/H5HFhdr.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -339,7 +337,7 @@ done:
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5HF_hdr_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam)
+H5HF_hdr_create(H5F_t *f, const H5HF_create_t *cparam)
 {
     H5HF_hdr_t *hdr = NULL;     /* The new fractal heap header information */
     size_t dblock_overhead;     /* Direct block's overhead */
@@ -426,11 +424,9 @@ H5HF_hdr_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam)
         if(NULL == H5O_msg_copy(H5O_PLINE_ID, &(cparam->pline), &(hdr->pline)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCOPY, HADDR_UNDEF, "can't copy I/O filter pipeline")
 
-        /* Pay attention to the latest version flag for the file */
-        if(H5F_USE_LATEST_FLAGS(hdr->f, H5F_LATEST_PLINE_MSG))
-            /* Set the latest version for the I/O pipeline message */
-            if(H5O_pline_set_latest_version(&(hdr->pline)) < 0)
-                HGOTO_ERROR(H5E_HEAP, H5E_CANTSET, HADDR_UNDEF, "can't set latest version of I/O filter pipeline")
+        /* Set the version for the I/O pipeline message */
+        if(H5O_pline_set_version(hdr->f, &(hdr->pline)) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTSET, HADDR_UNDEF, "can't set version of I/O filter pipeline")
 
         /* Compute the I/O filters' encoded size */
         if(0 == (hdr->filter_len = (unsigned)H5O_msg_raw_size(hdr->f, H5O_PLINE_ID, FALSE, &(hdr->pline))))
@@ -497,11 +493,11 @@ H5HF_hdr_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam)
 	HGOTO_ERROR(H5E_HEAP, H5E_BADVALUE, HADDR_UNDEF, "max. direct block size not large enough to hold all managed blocks")
 
     /* Allocate space for the header on disk */
-    if(HADDR_UNDEF == (hdr->heap_addr = H5MF_alloc(f, H5FD_MEM_FHEAP_HDR, dxpl_id, (hsize_t)hdr->heap_size)))
+    if(HADDR_UNDEF == (hdr->heap_addr = H5MF_alloc(f, H5FD_MEM_FHEAP_HDR, (hsize_t)hdr->heap_size)))
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "file allocation failed for fractal heap header")
 
     /* Cache the new fractal heap header */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_FHEAP_HDR, hdr->heap_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_FHEAP_HDR, hdr->heap_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, HADDR_UNDEF, "can't add fractal heap header to cache")
 
     /* Set address of heap header to return */
@@ -517,7 +513,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_hdr_protect
+ * Function:	H5HF__hdr_protect
  *
  * Purpose:	Convenience wrapper around H5AC_protect on an indirect block
  *
@@ -530,13 +526,13 @@ done:
  *-------------------------------------------------------------------------
  */
 H5HF_hdr_t *
-H5HF_hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags)
+H5HF__hdr_protect(H5F_t *f, haddr_t addr, unsigned flags)
 {
     H5HF_hdr_cache_ud_t cache_udata;    /* User-data for callback */
     H5HF_hdr_t *hdr;                    /* Fractal heap header */
     H5HF_hdr_t *ret_value = NULL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     HDassert(f);
@@ -547,10 +543,9 @@ H5HF_hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags)
 
     /* Set up userdata for protect call */
     cache_udata.f = f;
-    cache_udata.dxpl_id = dxpl_id;
 
     /* Lock the heap header into memory */
-    if(NULL == (hdr = (H5HF_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_FHEAP_HDR, addr, &cache_udata, flags)))
+    if(NULL == (hdr = (H5HF_hdr_t *)H5AC_protect(f, H5AC_FHEAP_HDR, addr, &cache_udata, flags)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect fractal heap header")
 
     /* Set the header's address */
@@ -564,7 +559,7 @@ H5HF_hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_hdr_protect() */
+} /* end H5HF__hdr_protect() */
 
 
 /*-------------------------------------------------------------------------
@@ -923,7 +918,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_hdr_skip_blocks
+ * Function:	H5HF__hdr_skip_blocks
  *
  * Purpose:	Add skipped direct blocks to free space for heap
  *
@@ -936,14 +931,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_hdr_skip_blocks(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *iblock,
+H5HF__hdr_skip_blocks(H5HF_hdr_t *hdr, H5HF_indirect_t *iblock,
     unsigned start_entry, unsigned nentries)
 {
     unsigned row, col;                  /* Row & column of entry */
     hsize_t sect_size;                  /* Size of section in heap space */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -963,16 +958,16 @@ H5HF_hdr_skip_blocks(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *iblock,
         HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't increase allocated heap size")
 
     /* Add 'indirect' section for blocks skipped in this row */
-    if(H5HF_sect_indirect_add(hdr, dxpl_id, iblock, start_entry, nentries) < 0)
+    if(H5HF__sect_indirect_add(hdr, iblock, start_entry, nentries) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't create indirect section for indirect block's free space")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_hdr_skip_blocks() */
+} /* end H5HF__hdr_skip_blocks() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_hdr_update_iter
+ * Function:	H5HF__hdr_update_iter
  *
  * Purpose:	Update state of heap to account for current iterator
  *              position.
@@ -988,11 +983,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
+H5HF__hdr_update_iter(H5HF_hdr_t *hdr, size_t min_dblock_size)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1002,7 +997,7 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
 
     /* Check for creating first indirect block */
     if(hdr->man_dtable.curr_root_rows == 0) {
-        if(H5HF_man_iblock_root_create(hdr, dxpl_id, min_dblock_size) < 0)
+        if(H5HF__man_iblock_root_create(hdr, min_dblock_size) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTEXTEND, FAIL, "unable to create root indirect block")
     } /* end if */
     else {
@@ -1018,7 +1013,7 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
         /* Initialize block iterator, if necessary */
         if(!H5HF_man_iter_ready(&hdr->next_block)) {
             /* Start iterator with previous offset of iterator */
-            if(H5HF_man_iter_start_offset(hdr, dxpl_id, &hdr->next_block, hdr->man_iter_off) < 0)
+            if(H5HF__man_iter_start_offset(hdr, &hdr->next_block, hdr->man_iter_off) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "unable to set block iterator location")
         } /* end if */
 
@@ -1039,7 +1034,7 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
                 skip_entries = min_entry - next_entry;
 
             /* Add skipped direct blocks to heap's free space */
-            if(H5HF_hdr_skip_blocks(hdr, dxpl_id, iblock, next_entry, skip_entries) < 0)
+            if(H5HF__hdr_skip_blocks(hdr, iblock, next_entry, skip_entries) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't add skipped blocks to heap's free space")
 
             /* Get information about new iterator location */
@@ -1056,7 +1051,7 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
             while(next_row >= iblock->nrows) {
                 /* Check for needing to expand root indirect block */
                 if(iblock->parent == NULL) {
-                    if(H5HF_man_iblock_root_double(hdr, dxpl_id, min_dblock_size) < 0)
+                    if(H5HF__man_iblock_root_double(hdr, min_dblock_size) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTEXTEND, FAIL, "unable to double root indirect block")
                 } /* end if */
                 else {
@@ -1101,7 +1096,7 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
                         child_entry = iblock->nrows * hdr->man_dtable.cparam.width;
 
                     /* Add skipped indirect blocks to heap's free space */
-                    if(H5HF_hdr_skip_blocks(hdr, dxpl_id, iblock, next_entry, (child_entry - next_entry)) < 0)
+                    if(H5HF__hdr_skip_blocks(hdr, iblock, next_entry, (child_entry - next_entry)) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't add skipped blocks to heap's free space")
                 } /* end if */
                 else {
@@ -1110,11 +1105,11 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
                     haddr_t new_iblock_addr;        /* New indirect block's address */
 
                     /* Allocate new indirect block */
-                    if(H5HF_man_iblock_create(hdr, dxpl_id, iblock, next_entry, child_nrows, child_nrows, &new_iblock_addr) < 0)
+                    if(H5HF__man_iblock_create(hdr, iblock, next_entry, child_nrows, child_nrows, &new_iblock_addr) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap indirect block")
 
                     /* Lock new indirect block */
-                    if(NULL == (new_iblock = H5HF_man_iblock_protect(hdr, dxpl_id, new_iblock_addr, child_nrows, iblock, next_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
+                    if(NULL == (new_iblock = H5HF__man_iblock_protect(hdr, new_iblock_addr, child_nrows, iblock, next_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
 
                     /* Move iterator down one level (pins indirect block) */
@@ -1129,12 +1124,12 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
                         new_entry = hdr->man_dtable.cparam.width * min_dblock_row;
 
                         /* Add skipped blocks to heap's free space */
-                        if(H5HF_hdr_skip_blocks(hdr, dxpl_id, new_iblock, 0, new_entry) < 0)
+                        if(H5HF__hdr_skip_blocks(hdr, new_iblock, 0, new_entry) < 0)
                             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't add skipped blocks to heap's free space")
                     } /* end if */
 
                     /* Unprotect child indirect block */
-                    if(H5HF_man_iblock_unprotect(new_iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+                    if(H5HF__man_iblock_unprotect(new_iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
                 } /* end else */
 
@@ -1150,7 +1145,7 @@ H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_hdr_update_iter() */
+} /* end H5HF__hdr_update_iter() */
 
 
 /*-------------------------------------------------------------------------
@@ -1193,7 +1188,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_hdr_reverse_iter
+ * Function:	H5HF__hdr_reverse_iter
  *
  * Purpose:	Walk "next block" iterator backwards until the correct
  *              location to allocate next block from is found
@@ -1207,7 +1202,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr)
+H5HF__hdr_reverse_iter(H5HF_hdr_t *hdr, haddr_t dblock_addr)
 {
     H5HF_indirect_t *iblock;            /* Indirect block where iterator is located */
     unsigned curr_entry;                /* Current entry for iterator */
@@ -1215,7 +1210,7 @@ H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr)
     hbool_t walked_up;                  /* Loop flag */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1225,7 +1220,7 @@ H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr)
     /* Initialize block iterator, if necessary */
     if(!H5HF_man_iter_ready(&hdr->next_block))
         /* Start iterator with previous offset of iterator */
-        if(H5HF_man_iter_start_offset(hdr, dxpl_id, &hdr->next_block, hdr->man_iter_off) < 0)
+        if(H5HF__man_iter_start_offset(hdr, &hdr->next_block, hdr->man_iter_off) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "unable to set block iterator location")
 
     /* Walk backwards through heap, looking for direct block to place iterator after */
@@ -1308,7 +1303,7 @@ H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr)
                 child_nrows = H5HF_dtable_size_to_rows(&hdr->man_dtable, hdr->man_dtable.row_block_size[row]);
 
                 /* Lock child indirect block */
-                if(NULL == (child_iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock->ents[curr_entry].addr, child_nrows, iblock, curr_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
+                if(NULL == (child_iblock = H5HF__man_iblock_protect(hdr, iblock->ents[curr_entry].addr, child_nrows, iblock, curr_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
 
                 /* Set the current location of the iterator */
@@ -1324,7 +1319,7 @@ H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr)
                 curr_entry = (child_iblock->nrows * hdr->man_dtable.cparam.width) - 1;
 
                 /* Unprotect child indirect block */
-                if(H5HF_man_iblock_unprotect(child_iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+                if(H5HF__man_iblock_unprotect(child_iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
                 /* Note that we walked down */
@@ -1335,11 +1330,11 @@ H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t dblock_addr)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_hdr_reverse_iter() */
+} /* end H5HF__hdr_reverse_iter() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_hdr_empty
+ * Function:	H5HF__hdr_empty
  *
  * Purpose:	Reset heap header to 'empty heap' state
  *
@@ -1352,11 +1347,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_hdr_empty(H5HF_hdr_t *hdr)
+H5HF__hdr_empty(H5HF_hdr_t *hdr)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(hdr);
@@ -1371,6 +1366,10 @@ H5HF_hdr_empty(H5HF_hdr_t *hdr)
     hdr->man_size = 0;
     hdr->man_alloc_size = 0;
 
+    /* Reset root pointer information */
+    hdr->man_dtable.curr_root_rows = 0;
+    hdr->man_dtable.table_addr = HADDR_UNDEF;
+
     /* Reset the 'next block' iterator location */
     hdr->man_iter_off = 0;
 
@@ -1383,7 +1382,7 @@ H5HF_hdr_empty(H5HF_hdr_t *hdr)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_hdr_empty() */
+} /* end H5HF__hdr_empty() */
 
 
 /*-------------------------------------------------------------------------
@@ -1429,7 +1428,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_hdr_delete
+ * Function:	H5HF__hdr_delete
  *
  * Purpose:	Delete a fractal heap, starting with the header
  *
@@ -1442,12 +1441,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_hdr_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
+H5HF__hdr_delete(H5HF_hdr_t *hdr)
 {
     unsigned cache_flags = H5AC__NO_FLAGS_SET;  /* Flags for unprotecting heap header */
     herr_t ret_value = SUCCEED;                 /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1473,35 +1472,35 @@ H5HF_hdr_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
     /* (must occur before attempting to delete the heap, so indirect blocks
      *  will get unpinned)
      */
-    if(H5F_addr_defined(hdr->fs_addr)) {
+    if(H5F_addr_defined(hdr->fs_addr))
         /* Delete free space manager for heap */
-        if(H5HF_space_delete(hdr, dxpl_id) < 0)
+        if(H5HF__space_delete(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release fractal heap free space manager")
-    } /* end if */
 
     /* Check for root direct/indirect block */
     if(H5F_addr_defined(hdr->man_dtable.table_addr)) {
         if(hdr->man_dtable.curr_root_rows == 0) {
-            hsize_t dblock_size;        /* Size of direct block */
+            hsize_t dblock_size;                /* Size of direct block on disk */
 
             /* Check for I/O filters on this heap */
             if(hdr->filter_len > 0) {
-                dblock_size = (hsize_t)hdr->pline_root_direct_size;
+                /* Set the dblock's size */
+                dblock_size = hdr->pline_root_direct_size;
 
                 /* Reset the header's pipeline information */
                 hdr->pline_root_direct_size = 0;
                 hdr->pline_root_direct_filter_mask = 0;
-            } /* end else */
+            } /* end if */
             else
-                dblock_size = (hsize_t)hdr->man_dtable.cparam.start_block_size;
+                dblock_size = hdr->man_dtable.cparam.start_block_size;
 
             /* Delete root direct block */
-            if(H5HF_man_dblock_delete(hdr->f, dxpl_id, hdr->man_dtable.table_addr, dblock_size) < 0)
+            if(H5HF__man_dblock_delete(hdr->f, hdr->man_dtable.table_addr, dblock_size) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release fractal heap root direct block")
         } /* end if */
         else {
             /* Delete root indirect block */
-            if(H5HF_man_iblock_delete(hdr, dxpl_id, hdr->man_dtable.table_addr, hdr->man_dtable.curr_root_rows, NULL, 0) < 0)
+            if(H5HF__man_iblock_delete(hdr, hdr->man_dtable.table_addr, hdr->man_dtable.curr_root_rows, NULL, 0) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release fractal heap root indirect block")
         } /* end else */
     } /* end if */
@@ -1509,7 +1508,7 @@ H5HF_hdr_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
     /* Check for 'huge' objects in heap */
     if(H5F_addr_defined(hdr->huge_bt2_addr)) {
         /* Delete huge objects in heap and their tracker */
-        if(H5HF_huge_delete(hdr, dxpl_id) < 0)
+        if(H5HF__huge_delete(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release fractal heap 'huge' objects and tracker")
     } /* end if */
 
@@ -1518,9 +1517,9 @@ H5HF_hdr_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
 
 done:
     /* Unprotect the header with appropriate flags */
-    if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_FHEAP_HDR, hdr->heap_addr, hdr, cache_flags) < 0)
+    if(H5AC_unprotect(hdr->f, H5AC_FHEAP_HDR, hdr->heap_addr, hdr, cache_flags) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap header")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_hdr_delete() */
+} /* end H5HF__hdr_delete() */
 
diff --git a/src/H5HFhuge.c b/src/H5HFhuge.c
index 94433c4..6e475ad 100644
--- a/src/H5HFhuge.c
+++ b/src/H5HFhuge.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -66,12 +64,12 @@
 /********************/
 
 /* Local v2 B-tree operations */
-static herr_t H5HF_huge_bt2_create(H5HF_hdr_t *hdr, hid_t dxpl_id);
+static herr_t H5HF__huge_bt2_create(H5HF_hdr_t *hdr);
 
 /* Local 'huge' object support routines */
 static hsize_t H5HF_huge_new_id(H5HF_hdr_t *hdr);
-static herr_t H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    const uint8_t *id, hbool_t is_read, H5HF_operator_t op, void *op_data);
+static herr_t H5HF__huge_op_real(H5HF_hdr_t *hdr, const uint8_t *id,
+    hbool_t is_read, H5HF_operator_t op, void *op_data);
 
 
 /*********************/
@@ -90,7 +88,7 @@ static herr_t H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id,
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_bt2_create
+ * Function:	H5HF__huge_bt2_create
  *
  * Purpose:	Create the v2 B-tree for tracking the huge objects in the heap
  *
@@ -103,12 +101,12 @@ static herr_t H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id,
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_huge_bt2_create(H5HF_hdr_t *hdr, hid_t dxpl_id)
+H5HF__huge_bt2_create(H5HF_hdr_t *hdr)
 {
     H5B2_create_t bt2_cparam;           /* v2 B-tree creation parameters */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -157,7 +155,7 @@ H5HF_huge_bt2_create(H5HF_hdr_t *hdr, hid_t dxpl_id)
     bt2_cparam.merge_percent = H5HF_HUGE_BT2_MERGE_PERC;
 
     /* Create v2 B-tree for tracking 'huge' objects */
-    if(NULL == (hdr->huge_bt2 = H5B2_create(hdr->f, dxpl_id, &bt2_cparam, hdr->f)))
+    if(NULL == (hdr->huge_bt2 = H5B2_create(hdr->f, &bt2_cparam, hdr->f)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTCREATE, FAIL, "can't create v2 B-tree for tracking 'huge' heap objects")
 
     /* Retrieve the v2 B-tree's address in the file */
@@ -166,7 +164,7 @@ H5HF_huge_bt2_create(H5HF_hdr_t *hdr, hid_t dxpl_id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_bt2_create() */
+} /* end H5HF__huge_bt2_create() */
 
 
 /*-------------------------------------------------------------------------
@@ -293,7 +291,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_insert
+ * Function:	H5HF__huge_insert
  *
  * Purpose:	Insert a 'huge' object into the file and track it
  *
@@ -306,8 +304,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, void *obj,
-    void *_id)
+H5HF__huge_insert(H5HF_hdr_t *hdr, size_t obj_size, void *obj, void *_id)
 {
     uint8_t *id = (uint8_t *)_id;       /* Pointer to ID buffer */
     haddr_t obj_addr;                   /* Address of object in the file */
@@ -316,7 +313,7 @@ H5HF_huge_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, void *obj,
     unsigned filter_mask = 0;           /* Filter mask for object (only used for filtered objects) */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 #ifdef QAK
 HDfprintf(stderr, "%s: obj_size = %Zu\n", FUNC, obj_size);
 #endif /* QAK */
@@ -332,14 +329,14 @@ HDfprintf(stderr, "%s: obj_size = %Zu\n", FUNC, obj_size);
     /* Check if the v2 B-tree for tracking 'huge' heap objects has been created yet */
     if(!H5F_addr_defined(hdr->huge_bt2_addr)) {
         /* Go create (& open) v2 B-tree */
-        if(H5HF_huge_bt2_create(hdr, dxpl_id) < 0)
+        if(H5HF__huge_bt2_create(hdr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCREATE, FAIL, "can't create v2 B-tree for tracking 'huge' heap objects")
     } /* end if */
     else {
         /* Check if v2 B-tree is open yet */
         if(NULL == hdr->huge_bt2) {
             /* Open existing v2 B-tree */
-            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, hdr->huge_bt2_addr, hdr->f)))
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' heap objects")
         } /* end if */
     } /* end else */
@@ -347,9 +344,13 @@ HDfprintf(stderr, "%s: obj_size = %Zu\n", FUNC, obj_size);
 
     /* Check for I/O pipeline filter on heap */
     if(hdr->filter_len > 0) {
-        H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        H5Z_cb_t filter_cb;                 /* Filter callback structure */
         size_t nbytes;                      /* Number of bytes used */
 
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;          /* no callback function when failed */
+
         /* Allocate buffer to perform I/O filtering on */
         write_size = obj_size;
         if(NULL == (write_buf = H5MM_malloc(write_size)))
@@ -375,11 +376,11 @@ HDfprintf(stderr, "%s: obj_size = %Zu, obj = %p\n", FUNC, obj_size, obj);
     } /* end else */
 
     /* Allocate space in the file for storing the 'huge' object */
-    if(HADDR_UNDEF == (obj_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, dxpl_id, (hsize_t)write_size)))
+    if(HADDR_UNDEF == (obj_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, (hsize_t)write_size)))
         HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap huge object")
 
     /* Write the object's data to disk */
-    if(H5F_block_write(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, obj_addr, write_size, H5AC_rawdata_dxpl_id, write_buf) < 0)
+    if(H5F_block_write(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, obj_addr, write_size, write_buf) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, "writing 'huge' object to file failed")
 
     /* Release buffer for writing, if we had one */
@@ -403,7 +404,7 @@ HDfprintf(stderr, "%s: obj_rec = {%a, %Hu, %x, %Hu}\n", FUNC, obj_rec.addr, obj_
 #endif /* QAK */
 
             /* Insert record for object in v2 B-tree */
-            if(H5B2_insert(hdr->huge_bt2, dxpl_id, &obj_rec) < 0)
+            if(H5B2_insert(hdr->huge_bt2, &obj_rec) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "couldn't insert object tracking record in v2 B-tree")
 
             /* Encode ID for user */
@@ -424,7 +425,7 @@ HDfprintf(stderr, "%s: obj_rec = {%a, %Hu}\n", FUNC, obj_rec.addr, obj_rec.len);
 #endif /* QAK */
 
             /* Insert record for object in v2 B-tree */
-            if(H5B2_insert(hdr->huge_bt2, dxpl_id, &obj_rec) < 0)
+            if(H5B2_insert(hdr->huge_bt2, &obj_rec) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "couldn't insert object tracking record in v2 B-tree")
 
             /* Encode ID for user */
@@ -471,7 +472,7 @@ HDfprintf(stderr, "%s: indir_rec = {%a, %Hu, %Hu}\n", FUNC, indir_rec.addr, indi
         } /* end else */
 
         /* Insert record for tracking object in v2 B-tree */
-        if(H5B2_insert(hdr->huge_bt2, dxpl_id, ins_rec) < 0)
+        if(H5B2_insert(hdr->huge_bt2, ins_rec) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "couldn't insert object tracking record in v2 B-tree")
 
         /* Encode ID for user */
@@ -489,11 +490,11 @@ HDfprintf(stderr, "%s: indir_rec = {%a, %Hu, %Hu}\n", FUNC, indir_rec.addr, indi
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_insert() */
+} /* end H5HF__huge_insert() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_get_obj_len
+ * Function:	H5HF__huge_get_obj_len
  *
  * Purpose:	Get the size of a 'huge' object in a fractal heap
  *
@@ -506,12 +507,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    size_t *obj_len_p)
+H5HF__huge_get_obj_len(H5HF_hdr_t *hdr, const uint8_t *id, size_t *obj_len_p)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -545,7 +545,7 @@ H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         /* Check if v2 B-tree is open yet */
         if(NULL == hdr->huge_bt2) {
             /* Open existing v2 B-tree */
-            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, hdr->huge_bt2_addr, hdr->f)))
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' heap objects")
         } /* end if */
 
@@ -557,7 +557,7 @@ H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
             UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
 
             /* Look up object in v2 B-tree */
-            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_filt_indir_found, &found_rec) != TRUE)
+            if(H5B2_find(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_filt_indir_found, &found_rec) != TRUE)
                 HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
 
             /* Retrieve the object's length */
@@ -571,7 +571,7 @@ H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
             UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
 
             /* Look up object in v2 B-tree */
-            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
+            if(H5B2_find(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
                 HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
 
             /* Retrieve the object's length */
@@ -581,7 +581,7 @@ H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_get_obj_len() */
+} /* end H5HF__huge_get_obj_len() */
 
 
 /*-------------------------------------------------------------------------
@@ -598,13 +598,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    hsize_t *obj_off_p)
+H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, const uint8_t *id, hsize_t *obj_off_p)
 {
     haddr_t obj_addr;                   /* Object's address in the file */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -629,7 +628,7 @@ H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         /* Check if v2 B-tree is open yet */
         if(NULL == hdr->huge_bt2) {
             /* Open existing v2 B-tree */
-            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, hdr->huge_bt2_addr, hdr->f)))
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' heap objects")
         } /* end if */
 
@@ -641,7 +640,7 @@ H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
             UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
 
             /* Look up object in v2 B-tree */
-            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_filt_indir_found, &found_rec) != TRUE)
+            if(H5B2_find(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_filt_indir_found, &found_rec) != TRUE)
                 HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
 
             /* Retrieve the object's address & length */
@@ -655,7 +654,7 @@ H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
             UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
 
             /* Look up object in v2 B-tree */
-            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
+            if(H5B2_find(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
                 HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
 
             /* Retrieve the object's address & length */
@@ -672,7 +671,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_op_real
+ * Function:	H5HF__huge_op_real
  *
  * Purpose:	Internal routine to perform an operation on a 'huge' object
  *
@@ -685,8 +684,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    hbool_t is_read, H5HF_operator_t op, void *op_data)
+H5HF__huge_op_real(H5HF_hdr_t *hdr, const uint8_t *id, hbool_t is_read,
+    H5HF_operator_t op, void *op_data)
 {
     void *read_buf = NULL;              /* Pointer to buffer for reading */
     haddr_t obj_addr;                   /* Object's address in the file */
@@ -694,7 +693,7 @@ H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
     unsigned filter_mask = 0;           /* Filter mask for object (only used for filtered objects) */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -723,7 +722,7 @@ H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         /* Check if v2 B-tree is open yet */
         if(NULL == hdr->huge_bt2) {
             /* Open existing v2 B-tree */
-            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, hdr->huge_bt2_addr, hdr->f)))
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' heap objects")
         } /* end if */
 
@@ -735,7 +734,7 @@ H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
             UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
 
             /* Look up object in v2 B-tree */
-            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_filt_indir_found, &found_rec) != TRUE)
+            if(H5B2_find(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_filt_indir_found, &found_rec) != TRUE)
                 HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
 
             /* Retrieve the object's address & length */
@@ -751,7 +750,7 @@ H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
             UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
 
             /* Look up object in v2 B-tree */
-            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
+            if(H5B2_find(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
                 HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
 
             /* Retrieve the object's address & length */
@@ -770,15 +769,19 @@ H5HF_huge_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
 
     /* Read the object's (possibly filtered) data from the file */
     /* (reads directly into application's buffer if no filters are present) */
-    if(H5F_block_read(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, obj_addr, (size_t)obj_size, H5AC_rawdata_dxpl_id, read_buf) < 0)
+    if(H5F_block_read(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, obj_addr, (size_t)obj_size, read_buf) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_READERROR, FAIL, "can't read 'huge' object's data from the file")
 
     /* Check for I/O pipeline filter on heap */
     if(hdr->filter_len > 0) {
-        H5Z_cb_t filter_cb = {NULL, NULL};  /* Filter callback structure */
+        H5Z_cb_t filter_cb;                 /* Filter callback structure */
         size_t read_size;                   /* Object's size in the file */
         size_t nbytes;                      /* Number of bytes used */
 
+        /* Initialize the filter callback struct */
+        filter_cb.op_data = NULL;
+        filter_cb.func = NULL;          /* no callback function when failed */
+
         /* De-filter the object */
         read_size = nbytes = obj_size;
         if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_NO_EDC, filter_cb, &nbytes, &read_size, &read_buf) < 0)
@@ -810,11 +813,11 @@ done:
         read_buf = H5MM_xfree(read_buf);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_op_real() */
+} /* end H5HF__huge_op_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_write
+ * Function:	H5HF__huge_write
  *
  * Purpose:	Write a 'huge' object to the heap
  *
@@ -832,14 +835,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    const void *obj)
+H5HF__huge_write(H5HF_hdr_t *hdr, const uint8_t *id, const void *obj)
 {
     haddr_t obj_addr;                   /* Object's address in the file */
     size_t obj_size;                    /* Object's size in the file */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -871,7 +873,7 @@ H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         /* Check if v2 B-tree is open yet */
         if(NULL == hdr->huge_bt2) {
             /* Open existing v2 B-tree */
-            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, hdr->huge_bt2_addr, hdr->f)))
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' heap objects")
         } /* end if */
 
@@ -879,7 +881,7 @@ H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
 
         /* Look up object in v2 B-tree */
-        if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
+        if(H5B2_find(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_indir_found, &found_rec) != TRUE)
             HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
 
         /* Retrieve the object's address & length */
@@ -889,16 +891,16 @@ H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
 
     /* Write the object's data to the file */
     /* (writes directly from application's buffer) */
-    if(H5F_block_write(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, obj_addr, obj_size, H5AC_rawdata_dxpl_id, obj) < 0)
+    if(H5F_block_write(hdr->f, H5FD_MEM_FHEAP_HUGE_OBJ, obj_addr, obj_size, obj) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, "writing 'huge' object to file failed")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_write() */
+} /* end H5HF__huge_write() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_read
+ * Function:	H5HF__huge_read
  *
  * Purpose:	Read a 'huge' object from the heap
  *
@@ -911,11 +913,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_read(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id, void *obj)
+H5HF__huge_read(H5HF_hdr_t *hdr, const uint8_t *id, void *obj)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -925,16 +927,16 @@ H5HF_huge_read(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id, void *obj)
     HDassert(obj);
 
     /* Call the internal 'op' routine */
-    if(H5HF_huge_op_real(hdr, dxpl_id, id, TRUE, NULL, obj) < 0)
+    if(H5HF__huge_op_real(hdr, id, TRUE, NULL, obj) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTOPERATE, FAIL, "unable to operate on heap object")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_read() */
+} /* end H5HF__huge_read() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_op
+ * Function:	H5HF__huge_op
  *
  * Purpose:	Operate directly on a 'huge' object
  *
@@ -947,12 +949,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    H5HF_operator_t op, void *op_data)
+H5HF__huge_op(H5HF_hdr_t *hdr, const uint8_t *id, H5HF_operator_t op,
+    void *op_data)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -962,16 +964,16 @@ H5HF_huge_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
     HDassert(op);
 
     /* Call the internal 'op' routine routine */
-    if(H5HF_huge_op_real(hdr, dxpl_id, id, FALSE, op, op_data) < 0)
+    if(H5HF__huge_op_real(hdr, id, FALSE, op, op_data) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTOPERATE, FAIL, "unable to operate on heap object")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_op() */
+} /* end H5HF__huge_op() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_remove
+ * Function:	H5HF__huge_remove
  *
  * Purpose:	Remove a 'huge' object from the file and the v2 B-tree tracker
  *
@@ -984,12 +986,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
+H5HF__huge_remove(H5HF_hdr_t *hdr, const uint8_t *id)
 {
     H5HF_huge_remove_ud_t udata;       /* User callback data for v2 B-tree remove call */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1001,7 +1003,7 @@ H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
     /* Check if v2 B-tree is open yet */
     if(NULL == hdr->huge_bt2) {
         /* Open existing v2 B-tree */
-        if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+        if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, hdr->huge_bt2_addr, hdr->f)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' heap objects")
     } /* end if */
 
@@ -1010,7 +1012,6 @@ H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
 
     /* Set up the common callback info */
     udata.hdr = hdr;
-    udata.dxpl_id = dxpl_id;
 
     /* Check for 'huge' object ID that encodes address & length directly */
     if(hdr->huge_ids_direct) {
@@ -1024,7 +1025,7 @@ H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
 
             /* Remove the record for tracking the 'huge' object from the v2 B-tree */
             /* (space in the file for the object is freed in the 'remove' callback) */
-            if(H5B2_remove(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_filt_dir_remove, &udata) < 0)
+            if(H5B2_remove(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_filt_dir_remove, &udata) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove object from B-tree")
         } /* end if */
         else {
@@ -1037,7 +1038,7 @@ H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
 
             /* Remove the record for tracking the 'huge' object from the v2 B-tree */
             /* (space in the file for the object is freed in the 'remove' callback) */
-            if(H5B2_remove(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_dir_remove, &udata) < 0)
+            if(H5B2_remove(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_dir_remove, &udata) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove object from B-tree")
         } /* end else */
     } /* end if */
@@ -1050,7 +1051,7 @@ H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
 
             /* Remove the record for tracking the 'huge' object from the v2 B-tree */
             /* (space in the file for the object is freed in the 'remove' callback) */
-            if(H5B2_remove(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_filt_indir_remove, &udata) < 0)
+            if(H5B2_remove(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_filt_indir_remove, &udata) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove object from B-tree")
         } /* end if */
         else {
@@ -1061,7 +1062,7 @@ H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
 
             /* Remove the record for tracking the 'huge' object from the v2 B-tree */
             /* (space in the file for the object is freed in the 'remove' callback) */
-            if(H5B2_remove(hdr->huge_bt2, dxpl_id, &search_rec, H5HF__huge_bt2_indir_remove, &udata) < 0)
+            if(H5B2_remove(hdr->huge_bt2, &search_rec, H5HF__huge_bt2_indir_remove, &udata) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove object from B-tree")
         } /* end else */
     } /* end else */
@@ -1076,11 +1077,11 @@ H5HF_huge_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_remove() */
+} /* end H5HF__huge_remove() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_term
+ * Function:	H5HF__huge_term
  *
  * Purpose:	Shut down the information for tracking 'huge' objects
  *
@@ -1093,11 +1094,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_term(H5HF_hdr_t *hdr, hid_t dxpl_id)
+H5HF__huge_term(H5HF_hdr_t *hdr)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1110,7 +1111,7 @@ H5HF_huge_term(H5HF_hdr_t *hdr, hid_t dxpl_id)
         HDassert(H5F_addr_defined(hdr->huge_bt2_addr));
 
         /* Close v2 B-tree index */
-        if(H5B2_close(hdr->huge_bt2, dxpl_id) < 0)
+        if(H5B2_close(hdr->huge_bt2) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree")
         hdr->huge_bt2 = NULL;
     } /* end if */
@@ -1124,7 +1125,7 @@ H5HF_huge_term(H5HF_hdr_t *hdr, hid_t dxpl_id)
 
         /* Delete the v2 B-tree */
         /* (any v2 B-tree class will work here) */
-        if(H5B2_delete(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f, NULL, NULL) < 0)
+        if(H5B2_delete(hdr->f, hdr->huge_bt2_addr, hdr->f, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDELETE, FAIL, "can't delete v2 B-tree")
 
         /* Reset the information about 'huge' objects in the file */
@@ -1139,11 +1140,11 @@ H5HF_huge_term(H5HF_hdr_t *hdr, hid_t dxpl_id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_term() */
+} /* end H5HF__huge_term() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_delete
+ * Function:	H5HF__huge_delete
  *
  * Purpose:	Delete all the 'huge' objects in the heap, and the v2 B-tree
  *              tracker for them
@@ -1157,13 +1158,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_huge_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
+H5HF__huge_delete(H5HF_hdr_t *hdr)
 {
     H5HF_huge_remove_ud_t udata;       /* User callback data for v2 B-tree remove call */
     H5B2_remove_t op;                   /* Callback for v2 B-tree removal */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1175,7 +1176,6 @@ H5HF_huge_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
 
     /* Set up the callback info */
     udata.hdr = hdr;
-    udata.dxpl_id = dxpl_id;
 
     /* Set the v2 B-tree callback operator */
     if(hdr->huge_ids_direct) {
@@ -1192,10 +1192,10 @@ H5HF_huge_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
     } /* end else */
 
     /* Delete the v2 B-tree */
-    if(H5B2_delete(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f, op, &udata) < 0)
+    if(H5B2_delete(hdr->f, hdr->huge_bt2_addr, hdr->f, op, &udata) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTDELETE, FAIL, "can't delete v2 B-tree")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_huge_delete() */
+} /* end H5HF__huge_delete() */
 
diff --git a/src/H5HFiblock.c b/src/H5HFiblock.c
index bb31002..e5c2559 100644
--- a/src/H5HFiblock.c
+++ b/src/H5HFiblock.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -59,10 +57,10 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5HF_iblock_pin(H5HF_indirect_t *iblock);
-static herr_t H5HF_iblock_unpin(H5HF_indirect_t *iblock);
-static herr_t H5HF_man_iblock_root_halve(H5HF_indirect_t *root_iblock, hid_t dxpl_id);
-static herr_t H5HF_man_iblock_root_revert(H5HF_indirect_t *root_iblock, hid_t dxpl_id);
+static herr_t H5HF__iblock_pin(H5HF_indirect_t *iblock);
+static herr_t H5HF__iblock_unpin(H5HF_indirect_t *iblock);
+static herr_t H5HF__man_iblock_root_halve(H5HF_indirect_t *root_iblock);
+static herr_t H5HF__man_iblock_root_revert(H5HF_indirect_t *root_iblock);
 
 
 /*********************/
@@ -94,7 +92,7 @@ H5FL_SEQ_DEFINE(H5HF_indirect_ptr_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_iblock_pin
+ * Function:	H5HF__iblock_pin
  *
  * Purpose:	Pin an indirect block in memory
  *
@@ -107,11 +105,11 @@ H5FL_SEQ_DEFINE(H5HF_indirect_ptr_t);
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_iblock_pin(H5HF_indirect_t *iblock)
+H5HF__iblock_pin(H5HF_indirect_t *iblock)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(iblock);
@@ -157,11 +155,11 @@ H5HF_iblock_pin(H5HF_indirect_t *iblock)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_iblock_pin() */
+} /* end H5HF__iblock_pin() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_iblock_unpin
+ * Function:	H5HF__iblock_unpin
  *
  * Purpose:	Unpin an indirect block in the metadata cache
  *
@@ -174,57 +172,22 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_iblock_unpin(H5HF_indirect_t *iblock)
+H5HF__iblock_unpin(H5HF_indirect_t *iblock)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(iblock);
 
-    /* If this indirect block has a parent, reset it's child iblock pointer */
-    if(iblock->parent) {
-        H5HF_indirect_t *par_iblock = iblock->parent;    /* Parent indirect block */
-        unsigned indir_idx;             /* Index in parent's child iblock pointer array */
-
-        /* Sanity check */
-        HDassert(par_iblock->child_iblocks);
-        HDassert(iblock->par_entry >= (iblock->hdr->man_dtable.max_direct_rows
-                * iblock->hdr->man_dtable.cparam.width));
-
-        /* Compute index in parent's child iblock pointer array */
-        indir_idx = iblock->par_entry - (iblock->hdr->man_dtable.max_direct_rows
-                * iblock->hdr->man_dtable.cparam.width);
-
-        /* Reset pointer to pinned child indirect block in parent */
-        HDassert(par_iblock->child_iblocks[indir_idx]);
-        par_iblock->child_iblocks[indir_idx] = NULL;
-    } /* end if */
-    else {
-        /* Check for root indirect block */
-        if(iblock->block_off == 0) {
-            /* Sanity check - shouldn't be recursively unpinning root indirect block */
-            HDassert(iblock->hdr->root_iblock_flags & H5HF_ROOT_IBLOCK_PINNED);
-
-            /* Check if we should reset the root iblock pointer */
-            if(H5HF_ROOT_IBLOCK_PINNED == iblock->hdr->root_iblock_flags) {
-                HDassert(NULL != iblock->hdr->root_iblock);
-                iblock->hdr->root_iblock = NULL;
-            } /* end if */
-
-            /* Indicate that the root indirect block is unpinned */
-            iblock->hdr->root_iblock_flags &= (unsigned)(~(H5HF_ROOT_IBLOCK_PINNED));
-        } /* end if */
-    } /* end else */
-
     /* Mark block as evictable again */
     if(H5AC_unpin_entry(iblock) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPIN, FAIL, "unable to unpin fractal heap indirect block")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_iblock_unpin() */
+} /* end H5HF__iblock_unpin() */
 
 
 /*-------------------------------------------------------------------------
@@ -253,7 +216,7 @@ H5HF_iblock_incr(H5HF_indirect_t *iblock)
 
     /* Mark block as un-evictable when a child block is depending on it */
     if(iblock->rc == 0)
-        if(H5HF_iblock_pin(iblock) < 0)
+        if(H5HF__iblock_pin(iblock) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPIN, FAIL, "unable to pin fractal heap indirect block")
 
     /* Increment reference count on shared indirect block */
@@ -265,7 +228,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_iblock_decr
+ * Function:	H5HF__iblock_decr
  *
  * Purpose:	Decrement reference count on shared indirect block
  *
@@ -278,11 +241,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_iblock_decr(H5HF_indirect_t *iblock)
+H5HF__iblock_decr(H5HF_indirect_t *iblock)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Sanity check */
     HDassert(iblock);
@@ -290,63 +253,60 @@ H5HF_iblock_decr(H5HF_indirect_t *iblock)
     /* Decrement reference count on shared indirect block */
     iblock->rc--;
 
-    /* Mark block as evictable again when no child blocks depend on it */
+    /* Check for last reference to block */
     if(iblock->rc == 0) {
-        H5HF_hdr_t *hdr;			/* Fractal heap header */
-        haddr_t iblock_addr;		/* Address of fractal heap */
-        hbool_t expunge_iblock = FALSE;     /* Whether to expunge indirect block from heap */
-
-        /* Set up convenience variables */
-        hdr = iblock->hdr;
-        iblock_addr = iblock->addr;
-
-        if(iblock->nchildren == 0) {
-            /* Check for deleting root indirect block (and no root direct block) */
-            if(iblock->block_off == 0 && hdr->man_dtable.curr_root_rows > 0) {
-                /* Reset root pointer information */
-                hdr->man_dtable.curr_root_rows = 0;
-                hdr->man_dtable.table_addr = HADDR_UNDEF;
-
-                /* Reset header information back to "empty heap" state */
-                if(H5HF_hdr_empty(hdr) < 0)
-                    HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't make heap empty")
-            } /* end if */
 
-            /* Detach from parent indirect block */
-            if(iblock->parent) {
-                /* Detach from parent indirect block */
-                if(H5HF_man_iblock_detach(iblock->parent, H5AC_ind_read_dxpl_id, iblock->par_entry) < 0)
-                    HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't detach from parent indirect block")
-                iblock->parent = NULL;
-                iblock->par_entry = 0;
-            } /* end if */
-
-	    /* Mark indirect block for removal from the metadata cache */
-	    expunge_iblock = TRUE;
-        } /* end if */
-
-	/* Unpin the indirect block */
-        if(H5HF_iblock_unpin(iblock) < 0)
-            HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPIN, FAIL, "unable to unpin fractal heap indirect block")
-
-	/* Check for expunging the indirect block from the metadata cache */
-	if(expunge_iblock) {
-            unsigned cache_flags = H5AC__NO_FLAGS_SET;
-
-            /* if the indirect block is in real file space, tell 
-             * the cache to free its file space.
-             */
-            if (!H5F_IS_TMP_ADDR(hdr->f, iblock_addr))
-                cache_flags |= H5AC__FREE_FILE_SPACE_FLAG;
-
-            if(H5AC_expunge_entry(hdr->f, H5AC_ind_read_dxpl_id, H5AC_FHEAP_IBLOCK, iblock_addr, cache_flags) < 0)
-                HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "unable to remove indirect block from cache")
-        } /* end if */
+	/* If this indirect block has a parent, reset it's child iblock pointer */
+	if(iblock->parent) {
+	    H5HF_indirect_t *par_iblock = iblock->parent;    /* Parent indirect block */
+	    unsigned indir_idx;             /* Index in parent's child iblock pointer array */
+
+	    /* Sanity check */
+	    HDassert(par_iblock->child_iblocks);
+	    HDassert(iblock->par_entry >= (iblock->hdr->man_dtable.max_direct_rows
+		    * iblock->hdr->man_dtable.cparam.width));
+
+	    /* Compute index in parent's child iblock pointer array */
+	    indir_idx = iblock->par_entry - (iblock->hdr->man_dtable.max_direct_rows
+		    * iblock->hdr->man_dtable.cparam.width);
+
+	    /* Reset pointer to pinned child indirect block in parent */
+	    HDassert(par_iblock->child_iblocks[indir_idx]);
+	    par_iblock->child_iblocks[indir_idx] = NULL;
+	} /* end if */
+	else {
+	    /* Check for root indirect block */
+	    if(iblock->block_off == 0) {
+		/* Sanity check - shouldn't be recursively unpinning root indirect block */
+		HDassert(iblock->hdr->root_iblock_flags & H5HF_ROOT_IBLOCK_PINNED);
+
+		/* Check if we should reset the root iblock pointer */
+		if(H5HF_ROOT_IBLOCK_PINNED == iblock->hdr->root_iblock_flags) {
+		    HDassert(NULL != iblock->hdr->root_iblock);
+		    iblock->hdr->root_iblock = NULL;
+		} /* end if */
+
+		/* Indicate that the root indirect block is unpinned */
+		iblock->hdr->root_iblock_flags &= (unsigned)(~(H5HF_ROOT_IBLOCK_PINNED));
+	    } /* end if */
+	} /* end else */
+
+	/* Check if the block is still in the cache */
+	if(!iblock->removed_from_cache) {
+	    /* Unpin the indirect block, making it evictable again */
+	    if(H5HF__iblock_unpin(iblock) < 0)
+		HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPIN, FAIL, "unable to unpin fractal heap indirect block")
+	} /* end if */
+	else {
+	    /* Destroy the indirect block */
+            if(H5HF_man_iblock_dest(iblock) < 0)
+                HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to destroy fractal heap indirect block")
+	} /* end else */
     } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_iblock_decr() */
+} /* end H5HF__iblock_decr() */
 
 
 /*-------------------------------------------------------------------------
@@ -382,7 +342,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_root_create
+ * Function:	H5HF__man_iblock_root_create
  *
  * Purpose:	Create root indirect block
  *
@@ -395,7 +355,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
+H5HF__man_iblock_root_create(H5HF_hdr_t *hdr, size_t min_dblock_size)
 {
     H5HF_indirect_t *iblock;        /* Pointer to indirect block */
     haddr_t iblock_addr;            /* Indirect block's address */
@@ -406,7 +366,7 @@ H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
     unsigned u;                     /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check for allocating entire root indirect block initially */
     if(hdr->man_dtable.cparam.start_root_rows == 0)
@@ -426,13 +386,13 @@ H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
     } /* end else */
 
     /* Allocate root indirect block */
-    if(H5HF_man_iblock_create(hdr, dxpl_id, NULL, 0, nrows, hdr->man_dtable.max_root_rows, &iblock_addr) < 0)
+    if(H5HF__man_iblock_create(hdr, NULL, 0, nrows, hdr->man_dtable.max_root_rows, &iblock_addr) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap indirect block")
 
     /* Move current direct block (used as root) into new indirect block */
 
     /* Lock new indirect block */
-    if(NULL == (iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, nrows, NULL, 0, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
+    if(NULL == (iblock = H5HF__man_iblock_protect(hdr, iblock_addr, nrows, NULL, 0, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
 
     /* Check if there's already a direct block as root) */
@@ -441,21 +401,22 @@ H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
         H5HF_direct_t *dblock;          /* Pointer to direct block to query */
 
         /* Lock first (root) direct block */
-        if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, hdr->man_dtable.table_addr, hdr->man_dtable.cparam.start_block_size, NULL, 0, H5AC__NO_FLAGS_SET)))
+        if(NULL == (dblock = H5HF__man_dblock_protect(hdr, hdr->man_dtable.table_addr, hdr->man_dtable.cparam.start_block_size, NULL, 0, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap direct block")
 
         /* Attach direct block to new root indirect block */
         dblock->parent = iblock;
-        dblock->fd_parent = iblock;
         dblock->par_entry = 0;
 
-	/* destroy flush dependency between direct block and header */
-	if(H5AC_destroy_flush_dependency(dblock->hdr, dblock) < 0)
+	/* Destroy flush dependency between direct block and header */
+	if(H5AC_destroy_flush_dependency(dblock->fd_parent, dblock) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
+        dblock->fd_parent = NULL;
 
-	/* create flush dependency between direct block and new root indirect block */
-	if(H5AC_create_flush_dependency(dblock->parent, dblock) < 0)
+	/* Create flush dependency between direct block and new root indirect block */
+	if(H5AC_create_flush_dependency(iblock, dblock) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
+        dblock->fd_parent = iblock;
 
         if(H5HF_man_iblock_attach(iblock, 0, hdr->man_dtable.table_addr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't attach root direct block to parent indirect block")
@@ -472,11 +433,11 @@ H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
         } /* end if */
 
         /* Scan free space sections to set any 'parent' pointers to new indirect block */
-        if(H5HF_space_create_root(hdr, dxpl_id, iblock) < 0)
+        if(H5HF__space_create_root(hdr, iblock) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSET, FAIL, "can't set free space section info to new root indirect block")
 
         /* Unlock first (previously the root) direct block */
-        if(H5AC_unprotect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, hdr->man_dtable.table_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_unprotect(hdr->f, H5AC_FHEAP_DBLOCK, hdr->man_dtable.table_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap direct block")
         dblock = NULL;
     } /* end if */
@@ -486,19 +447,18 @@ H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize block iterator")
 
     /* Check for skipping over direct blocks, in order to get to large enough block */
-    if(min_dblock_size > hdr->man_dtable.cparam.start_block_size) {
+    if(min_dblock_size > hdr->man_dtable.cparam.start_block_size)
         /* Add skipped blocks to heap's free space */
-        if(H5HF_hdr_skip_blocks(hdr, dxpl_id, iblock, have_direct_block,
+        if(H5HF__hdr_skip_blocks(hdr, iblock, have_direct_block,
                 ((nrows - 1) * hdr->man_dtable.cparam.width) - have_direct_block) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't add skipped blocks to heap's free space")
-    } /* end if */
 
     /* Mark indirect block as modified */
     if(H5HF_iblock_dirty(iblock) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTDIRTY, FAIL, "can't mark indirect block as dirty")
 
     /* Unprotect root indirect block (it's pinned by the iterator though) */
-    if(H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__DIRTIED_FLAG, did_protect) < 0)
+    if(H5HF__man_iblock_unprotect(iblock, H5AC__DIRTIED_FLAG, did_protect) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
     iblock = NULL;
 
@@ -521,11 +481,11 @@ H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_root_create() */
+} /* end H5HF__man_iblock_root_create() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_root_double
+ * Function:	H5HF__man_iblock_root_double
  *
  * Purpose:	Double size of root indirect block
  *
@@ -538,7 +498,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size)
+H5HF__man_iblock_root_double(H5HF_hdr_t *hdr, size_t min_dblock_size)
 {
     H5HF_indirect_t *iblock;    /* Pointer to root indirect block */
     haddr_t new_addr;           /* New address of indirect block */
@@ -555,7 +515,7 @@ H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
     size_t u;                   /* Local index variable */
     herr_t ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Get "new block" iterator information */
     if(H5HF_man_iter_curr(&hdr->next_block, &next_row, NULL, &next_entry, &iblock) < 0)
@@ -589,20 +549,10 @@ H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
 
     /* Check if the indirect block is NOT currently allocated in temp. file space */
     /* (temp. file space does not need to be freed) */
-    if(!H5F_IS_TMP_ADDR(hdr->f, iblock->addr)) {
-/* Currently, the old block data is "thrown away" after the space is reallocated,
-* to avoid data copy in H5MF_realloc() call by just free'ing the space and
-* allocating new space.
-*
-* This also keeps the file smaller, by freeing the space and then
-* allocating new space, instead of vice versa (in H5MF_realloc).
-*
-* QAK - 3/14/2006
-*/
+    if(!H5F_IS_TMP_ADDR(hdr->f, iblock->addr))
         /* Free previous indirect block disk space */
-        if(H5MF_xfree(hdr->f, H5FD_MEM_FHEAP_IBLOCK, dxpl_id, iblock->addr, (hsize_t)iblock->size) < 0)
+        if(H5MF_xfree(hdr->f, H5FD_MEM_FHEAP_IBLOCK, iblock->addr, (hsize_t)iblock->size) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap indirect block file space")
-    } /* end if */
 
     /* Compute size of buffer needed for new indirect block */
     iblock->nrows = new_nrows;
@@ -615,7 +565,7 @@ H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap indirect block")
     } /* end if */
     else {
-        if(HADDR_UNDEF == (new_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_IBLOCK, dxpl_id, (hsize_t)iblock->size)))
+        if(HADDR_UNDEF == (new_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_IBLOCK, (hsize_t)iblock->size)))
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap indirect block")
     } /* end else */
 
@@ -627,7 +577,7 @@ H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
 
     /* Move object in cache, if it actually was relocated */
     if(H5F_addr_ne(iblock->addr, new_addr)) {
-        if(H5AC_move_entry(hdr->f, H5AC_FHEAP_IBLOCK, iblock->addr, new_addr, dxpl_id) < 0)
+        if(H5AC_move_entry(hdr->f, H5AC_FHEAP_IBLOCK, iblock->addr, new_addr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTMOVE, FAIL, "unable to move fractal heap root indirect block")
         iblock->addr = new_addr;
     } /* end if */
@@ -637,11 +587,10 @@ H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
         HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "memory allocation failed for direct entries")
 
     /* Check for skipping over rows and add free section for skipped rows */
-    if(skip_direct_rows) {
+    if(skip_direct_rows)
         /* Add skipped blocks to heap's free space */
-        if(H5HF_hdr_skip_blocks(hdr, dxpl_id, iblock, next_entry, (new_next_entry - next_entry)) < 0)
+        if(H5HF__hdr_skip_blocks(hdr, iblock, next_entry, (new_next_entry - next_entry)) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't add skipped blocks to heap's free space")
-    } /* end if */
 
     /* Initialize new direct block entries in rows added */
     acc_dblock_free = 0;
@@ -708,11 +657,11 @@ H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_si
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_root_double() */
+} /* end H5HF__man_iblock_root_double() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_root_halve
+ * Function:	H5HF__man_iblock_root_halve
  *
  * Purpose:	Halve size of root indirect block
  *
@@ -725,7 +674,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_man_iblock_root_halve(H5HF_indirect_t *iblock, hid_t dxpl_id)
+H5HF__man_iblock_root_halve(H5HF_indirect_t *iblock)
 {
     H5HF_hdr_t *hdr = iblock->hdr;      /* Pointer to heap header */
     haddr_t new_addr;                   /* New address of indirect block */
@@ -737,7 +686,7 @@ H5HF_man_iblock_root_halve(H5HF_indirect_t *iblock, hid_t dxpl_id)
     unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(iblock);
@@ -752,20 +701,10 @@ H5HF_man_iblock_root_halve(H5HF_indirect_t *iblock, hid_t dxpl_id)
 
     /* Check if the indirect block is NOT currently allocated in temp. file space */
     /* (temp. file space does not need to be freed) */
-    if(!H5F_IS_TMP_ADDR(hdr->f, iblock->addr)) {
-/* Currently, the old block data is "thrown away" after the space is reallocated,
-* to avoid data copy in H5MF_realloc() call by just free'ing the space and
-* allocating new space.
-*
-* This also keeps the file smaller, by freeing the space and then
-* allocating new space, instead of vice versa (in H5MF_realloc).
-*
-* QAK - 6/12/2006
-*/
+    if(!H5F_IS_TMP_ADDR(hdr->f, iblock->addr))
         /* Free previous indirect block disk space */
-        if(H5MF_xfree(hdr->f, H5FD_MEM_FHEAP_IBLOCK, dxpl_id, iblock->addr, (hsize_t)iblock->size) < 0)
+        if(H5MF_xfree(hdr->f, H5FD_MEM_FHEAP_IBLOCK, iblock->addr, (hsize_t)iblock->size) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap indirect block file space")
-    } /* end if */
 
     /* Compute free space in rows to delete */
     acc_dblock_free = 0;
@@ -784,7 +723,7 @@ H5HF_man_iblock_root_halve(H5HF_indirect_t *iblock, hid_t dxpl_id)
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap indirect block")
     } /* end if */
     else {
-        if(HADDR_UNDEF == (new_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_IBLOCK, dxpl_id, (hsize_t)iblock->size)))
+        if(HADDR_UNDEF == (new_addr = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_IBLOCK, (hsize_t)iblock->size)))
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap indirect block")
     } /* end else */
 
@@ -796,7 +735,7 @@ H5HF_man_iblock_root_halve(H5HF_indirect_t *iblock, hid_t dxpl_id)
 
     /* Move object in cache, if it actually was relocated */
     if(H5F_addr_ne(iblock->addr, new_addr)) {
-        if(H5AC_move_entry(hdr->f, H5AC_FHEAP_IBLOCK, iblock->addr, new_addr, dxpl_id) < 0)
+        if(H5AC_move_entry(hdr->f, H5AC_FHEAP_IBLOCK, iblock->addr, new_addr) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSPLIT, FAIL, "unable to move fractal heap root indirect block")
         iblock->addr = new_addr;
     } /* end if */
@@ -843,11 +782,11 @@ H5HF_man_iblock_root_halve(H5HF_indirect_t *iblock, hid_t dxpl_id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_root_halve() */
+} /* end H5HF__man_iblock_root_halve() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_root_revert
+ * Function:	H5HF__man_iblock_root_revert
  *
  * Purpose:	Revert root indirect block back to root direct block
  *
@@ -863,7 +802,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_man_iblock_root_revert(H5HF_indirect_t *root_iblock, hid_t dxpl_id)
+H5HF__man_iblock_root_revert(H5HF_indirect_t *root_iblock)
 {
     H5HF_hdr_t *hdr;                    /* Pointer to heap's header */
     H5HF_direct_t *dblock = NULL;       /* Pointer to new root indirect block */
@@ -871,7 +810,7 @@ H5HF_man_iblock_root_revert(H5HF_indirect_t *root_iblock, hid_t dxpl_id)
     size_t dblock_size;                 /* Direct block's size */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -884,7 +823,7 @@ H5HF_man_iblock_root_revert(H5HF_indirect_t *root_iblock, hid_t dxpl_id)
     dblock_size = hdr->man_dtable.cparam.start_block_size;
 
     /* Get pointer to last direct block */
-    if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, dblock_addr, dblock_size, root_iblock, 0, H5AC__NO_FLAGS_SET)))
+    if(NULL == (dblock = H5HF__man_dblock_protect(hdr, dblock_addr, dblock_size, root_iblock, 0, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap direct block")
     HDassert(dblock->parent == root_iblock);
     HDassert(dblock->par_entry == 0);
@@ -896,24 +835,21 @@ H5HF_man_iblock_root_revert(H5HF_indirect_t *root_iblock, hid_t dxpl_id)
         hdr->pline_root_direct_filter_mask = root_iblock->filt_ents[0].filter_mask;
     } /* end if */
 
+    /* Destroy flush dependency between old root iblock and new root direct block */
+    if(H5AC_destroy_flush_dependency(dblock->fd_parent, dblock) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
+    dblock->fd_parent = NULL;
+
     /* Detach direct block from parent */
-    if(H5HF_man_iblock_detach(dblock->parent, dxpl_id, 0) < 0)
+    if(H5HF__man_iblock_detach(dblock->parent, 0) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't detach direct block from parent indirect block")
     dblock->parent = NULL;
     dblock->par_entry = 0;
 
-    /* destroy flush dependency between old root iblock and new root direct block*/
-    if(H5AC_destroy_flush_dependency(dblock->fd_parent, dblock) < 0)
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, \
-                    "unable to destroy flush dependency")
-
-
-    /* create flush dependency between header and new root direct block */
-    if(H5AC_create_flush_dependency(dblock->hdr, dblock) < 0)
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTDEPEND, FAIL, \
-                    "unable to create flush dependency")
-
-    dblock->fd_parent = NULL;
+    /* Create flush dependency between header and new root direct block */
+    if(H5AC_create_flush_dependency(hdr, dblock) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
+    dblock->fd_parent = hdr;
 
     /* Point root at direct block */
     hdr->man_dtable.curr_root_rows = 0;
@@ -928,20 +864,19 @@ H5HF_man_iblock_root_revert(H5HF_indirect_t *root_iblock, hid_t dxpl_id)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTEXTEND, FAIL, "can't increase space to cover root direct block")
 
     /* Scan free space sections to reset any 'parent' pointers */
-    if(H5HF_space_revert_root(hdr, dxpl_id) < 0)
+    if(H5HF__space_revert_root(hdr) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTRESET, FAIL, "can't reset free space section info")
 
-
 done:
-    if(dblock && H5AC_unprotect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
+    if(dblock && H5AC_unprotect(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap direct block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_root_revert() */
+} /* end H5HF__man_iblock_root_revert() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_alloc_row
+ * Function:	H5HF__man_iblock_alloc_row
  *
  * Purpose:	Allocate a "single" section for an object, out of a
  *              "row" section.
@@ -957,7 +892,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_alloc_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t **sec_node)
+H5HF__man_iblock_alloc_row(H5HF_hdr_t *hdr, H5HF_free_section_t **sec_node)
 {
     H5HF_indirect_t *iblock = NULL;     /* Pointer to indirect block */
     H5HF_free_section_t *old_sec_node = *sec_node; /* Pointer to old indirect section node */
@@ -965,7 +900,7 @@ H5HF_man_iblock_alloc_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t **
     hbool_t iblock_held = FALSE;        /* Flag to indicate that indirect block is held */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -974,12 +909,14 @@ H5HF_man_iblock_alloc_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t **
     HDassert(sec_node && old_sec_node);
     HDassert(old_sec_node->u.row.row < hdr->man_dtable.max_direct_rows);
 
-    /* Check for serialized section */
-    if(old_sec_node->sect_info.state == H5FS_SECT_SERIALIZED) {
-        /* Revive indirect section */
-        if(H5HF_sect_row_revive(hdr, dxpl_id, old_sec_node) < 0)
+    /* Check for serialized row section, or serialized / deleted indirect
+     * section under it. */
+    if(old_sec_node->sect_info.state == H5FS_SECT_SERIALIZED
+	    || (H5FS_SECT_SERIALIZED == old_sec_node->u.row.under->sect_info.state)
+            || (TRUE == old_sec_node->u.row.under->u.indirect.u.iblock->removed_from_cache))
+        /* Revive row and / or indirect section */
+        if(H5HF__sect_row_revive(hdr, old_sec_node) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTREVIVE, FAIL, "can't revive indirect section")
-    } /* end if */
 
     /* Get a pointer to the indirect block covering the section */
     if(NULL == (iblock = H5HF_sect_row_get_iblock(old_sec_node)))
@@ -991,25 +928,25 @@ H5HF_man_iblock_alloc_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t **
     iblock_held = TRUE;
 
     /* Reduce (& possibly re-add) 'row' section */
-    if(H5HF_sect_row_reduce(hdr, dxpl_id, old_sec_node, &dblock_entry) < 0)
+    if(H5HF__sect_row_reduce(hdr, old_sec_node, &dblock_entry) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't reduce row section node")
 
     /* Create direct block & single section */
-    if(H5HF_man_dblock_create(dxpl_id, hdr, iblock, dblock_entry, NULL, sec_node) < 0)
+    if(H5HF__man_dblock_create(hdr, iblock, dblock_entry, NULL, sec_node) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't allocate fractal heap direct block")
 
 done:
     /* Release hold on indirect block */
     if(iblock_held)
-        if(H5HF_iblock_decr(iblock) < 0)
+        if(H5HF__iblock_decr(iblock) < 0)
             HDONE_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_alloc_row() */
+} /* end H5HF__man_iblock_alloc_row() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_create
+ * Function:	H5HF__man_iblock_create
  *
  * Purpose:	Allocate & initialize a managed indirect block
  *
@@ -1022,14 +959,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_create(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *par_iblock,
+H5HF__man_iblock_create(H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblock,
     unsigned par_entry, unsigned nrows, unsigned max_rows, haddr_t *addr_p)
 {
     H5HF_indirect_t *iblock = NULL;     /* Pointer to indirect block */
     size_t u;                           /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1052,10 +989,11 @@ H5HF_man_iblock_create(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *par_iblo
     if(H5HF_hdr_incr(hdr) < 0)
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, FAIL, "can't increment reference count on shared heap header")
 
-    /* Set info for direct block */
+    /* Set info for indirect block */
     iblock->rc = 0;
     iblock->nrows = nrows;
     iblock->max_rows = max_rows;
+    iblock->removed_from_cache = FALSE;
 
     /* Compute size of buffer needed for indirect block */
     iblock->size = H5HF_MAN_INDIRECT_SIZE(hdr, iblock->nrows);
@@ -1102,19 +1040,13 @@ H5HF_man_iblock_create(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *par_iblo
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap indirect block")
     } /* end if */
     else {
-        if(HADDR_UNDEF == (*addr_p = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_IBLOCK, dxpl_id, (hsize_t)iblock->size)))
+        if(HADDR_UNDEF == (*addr_p = H5MF_alloc(hdr->f, H5FD_MEM_FHEAP_IBLOCK, (hsize_t)iblock->size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for fractal heap indirect block")
     } /* end else */
     iblock->addr = *addr_p;
 
     /* Attach to parent indirect block, if there is one */
     iblock->parent = par_iblock;
-    iblock->fd_parent = par_iblock; /* this copy of the parent pointer is */
-				    /* needed by the notify callback so   */
-				    /* that it can take down flush        */
-				    /* dependencies on eviction even if   */
-				    /* the parent pointer has been nulled */
-				    /* out.		JRM -- 5/18/14    */
     iblock->par_entry = par_entry;
     if(iblock->parent) {
         /* Attach new block to parent */
@@ -1126,16 +1058,23 @@ H5HF_man_iblock_create(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *par_iblo
         iblock->block_off = par_iblock->block_off;
         iblock->block_off += hdr->man_dtable.row_block_off[par_entry / hdr->man_dtable.cparam.width];
         iblock->block_off += hdr->man_dtable.row_block_size[par_entry / hdr->man_dtable.cparam.width] * (par_entry % hdr->man_dtable.cparam.width);
+
+	/* Set indirect block parent as flush dependency parent */
+	iblock->fd_parent = par_iblock;
     } /* end if */
-    else
+    else {
         iblock->block_off = 0;  /* Must be the root indirect block... */
 
+	/* Set heap header as flush dependency parent */
+	iblock->fd_parent = hdr;
+    } /* end else */
+
     /* Update indirect block's statistics */
     iblock->nchildren = 0;
     iblock->max_child = 0;
 
     /* Cache the new indirect block */
-    if(H5AC_insert_entry(hdr->f, dxpl_id, H5AC_FHEAP_IBLOCK, *addr_p, iblock, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(hdr->f, H5AC_FHEAP_IBLOCK, *addr_p, iblock, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add fractal heap indirect block to cache")
 
 done:
@@ -1145,11 +1084,11 @@ done:
                 HDONE_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to destroy fractal heap indirect block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_create() */
+} /* end H5HF__man_iblock_create() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_protect
+ * Function:	H5HF__man_iblock_protect
  *
  * Purpose:	Convenience wrapper around H5AC_protect on an indirect block
  *
@@ -1162,7 +1101,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5HF_indirect_t *
-H5HF_man_iblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
+H5HF__man_iblock_protect(H5HF_hdr_t *hdr, haddr_t iblock_addr,
     unsigned iblock_nrows, H5HF_indirect_t *par_iblock, unsigned par_entry,
     hbool_t must_protect, unsigned flags, hbool_t *did_protect)
 {
@@ -1171,7 +1110,7 @@ H5HF_man_iblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
     hbool_t should_protect = FALSE;     /* Whether we should protect the indirect block or not */
     H5HF_indirect_t *ret_value = NULL;  /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1243,7 +1182,7 @@ H5HF_man_iblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
         cache_udata.nrows = &iblock_nrows;
 
         /* Protect the indirect block */
-        if(NULL == (iblock = (H5HF_indirect_t *)H5AC_protect(hdr->f, dxpl_id, H5AC_FHEAP_IBLOCK, iblock_addr, &cache_udata, flags)))
+        if(NULL == (iblock = (H5HF_indirect_t *)H5AC_protect(hdr->f, H5AC_FHEAP_IBLOCK, iblock_addr, &cache_udata, flags)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect fractal heap indirect block")
 
         /* Set the indirect block's address */
@@ -1276,11 +1215,11 @@ H5HF_man_iblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_protect() */
+} /* end H5HF__man_iblock_protect() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_unprotect
+ * Function:	H5HF__man_iblock_unprotect
  *
  * Purpose:	Convenience wrapper around H5AC_unprotect on an indirect block
  *
@@ -1293,12 +1232,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_unprotect(H5HF_indirect_t *iblock, hid_t dxpl_id,
-    unsigned cache_flags, hbool_t did_protect)
+H5HF__man_iblock_unprotect(H5HF_indirect_t *iblock, unsigned cache_flags,
+    hbool_t did_protect)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1324,13 +1263,13 @@ H5HF_man_iblock_unprotect(H5HF_indirect_t *iblock, hid_t dxpl_id,
         } /* end if */
 
         /* Unprotect the indirect block */
-        if(H5AC_unprotect(iblock->hdr->f, dxpl_id, H5AC_FHEAP_IBLOCK, iblock->addr, iblock, cache_flags) < 0)
+        if(H5AC_unprotect(iblock->hdr->f, H5AC_FHEAP_IBLOCK, iblock->addr, iblock, cache_flags) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
     } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_unprotect() */
+} /* end H5HF__man_iblock_unprotect() */
 
 
 /*-------------------------------------------------------------------------
@@ -1399,7 +1338,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_detach
+ * Function:	H5HF__man_iblock_detach
  *
  * Purpose:	Detach a child block (direct or indirect) from an indirect block
  *
@@ -1412,12 +1351,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_detach(H5HF_indirect_t *iblock, hid_t dxpl_id, unsigned entry)
+H5HF__man_iblock_detach(H5HF_indirect_t *iblock, unsigned entry)
 {
+    H5HF_hdr_t *hdr;			/* Fractal heap header */
+    H5HF_indirect_t *del_iblock = NULL;	/* Pointer to protected indirect block, when deleting */
     unsigned row;                       /* Row for entry */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1425,34 +1366,36 @@ H5HF_man_iblock_detach(H5HF_indirect_t *iblock, hid_t dxpl_id, unsigned entry)
     HDassert(iblock);
     HDassert(iblock->nchildren);
 
+    /* Set up convenience variables */
+    hdr = iblock->hdr;
+
     /* Reset address of entry */
     iblock->ents[entry].addr = HADDR_UNDEF;
 
     /* Compute row for entry */
-    row = entry / iblock->hdr->man_dtable.cparam.width;
+    row = entry / hdr->man_dtable.cparam.width;
 
     /* Check for I/O filters on this heap */
-    if(iblock->hdr->filter_len > 0) {
+    if(hdr->filter_len > 0) {
         /* Sanity check */
         HDassert(iblock->filt_ents);
 
         /* If this is a direct block, reset its initial size */
-        if(row < iblock->hdr->man_dtable.max_direct_rows) {
+        if(row < hdr->man_dtable.max_direct_rows) {
             iblock->filt_ents[entry].size = 0;
             iblock->filt_ents[entry].filter_mask = 0;
         } /* end if */
     } /* end if */
 
     /* Check for indirect block being detached */
-    if(row >= iblock->hdr->man_dtable.max_direct_rows) {
+    if(row >= hdr->man_dtable.max_direct_rows) {
         unsigned indir_idx;             /* Index in parent's child iblock pointer array */
 
         /* Sanity check */
         HDassert(iblock->child_iblocks);
 
         /* Compute index in child iblock pointer array */
-        indir_idx = entry - (iblock->hdr->man_dtable.max_direct_rows
-                * iblock->hdr->man_dtable.cparam.width);
+        indir_idx = entry - (hdr->man_dtable.max_direct_rows * hdr->man_dtable.cparam.width);
 
         /* Sanity check */
         HDassert(iblock->child_iblocks[indir_idx]);
@@ -1484,38 +1427,127 @@ H5HF_man_iblock_detach(H5HF_indirect_t *iblock, hid_t dxpl_id, unsigned entry)
          *      direct block
          */
         if(iblock->nchildren == 1 && H5F_addr_defined(iblock->ents[0].addr))
-            if(H5HF_man_iblock_root_revert(iblock, dxpl_id) < 0)
+            if(H5HF__man_iblock_root_revert(iblock) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't convert root indirect block back to root direct block")
 
-        /* Check for reducing size of root indirect block */
-        if(iblock->nchildren > 0 && iblock->hdr->man_dtable.cparam.start_root_rows != 0
-                && entry > iblock->max_child) {
-            unsigned max_child_row;         /* Row for max. child entry */
-
-            /* Compute information needed for determining whether to reduce size of root indirect block */
-            max_child_row = iblock->max_child / iblock->hdr->man_dtable.cparam.width;
-
-            /* Check if the root indirect block should be reduced */
-            if(iblock->nrows > 1 && max_child_row <= (iblock->nrows / 2))
-                if(H5HF_man_iblock_root_halve(iblock, dxpl_id) < 0)
-                    HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't reduce size of root indirect block")
-        } /* end if */
+	/* If the indirect block wasn't removed already (by reverting it) */
+	if(!iblock->removed_from_cache) {
+	    /* Check for reducing size of root indirect block */
+	    if(iblock->nchildren > 0 && hdr->man_dtable.cparam.start_root_rows != 0
+		    && entry > iblock->max_child) {
+		unsigned max_child_row;         /* Row for max. child entry */
+
+		/* Compute information needed for determining whether to reduce size of root indirect block */
+		max_child_row = iblock->max_child / hdr->man_dtable.cparam.width;
+
+		/* Check if the root indirect block should be reduced */
+		if(iblock->nrows > 1 && max_child_row <= (iblock->nrows / 2))
+		    if(H5HF__man_iblock_root_halve(iblock) < 0)
+			HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't reduce size of root indirect block")
+	    } /* end if */
+	} /* end if */
     } /* end if */
 
-    /* Mark indirect block as modified */
-    if(H5HF_iblock_dirty(iblock) < 0)
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTDIRTY, FAIL, "can't mark indirect block as dirty")
+    /* If the indirect block wasn't removed already (by reverting it) */
+    if(!iblock->removed_from_cache) {
+	/* Mark indirect block as modified */
+	if(H5HF_iblock_dirty(iblock) < 0)
+	    HGOTO_ERROR(H5E_HEAP, H5E_CANTDIRTY, FAIL, "can't mark indirect block as dirty")
+
+	/* Check for last child being removed from indirect block */
+	if(iblock->nchildren == 0) {
+	    hbool_t did_protect = FALSE;	/* Whether the indirect block was protected */
+
+	    /* If this indirect block's refcount is >1, then it's being deleted
+	     *	from the fractal heap (since its nchildren == 0), but is still
+	     *	referred to from free space sections in the heap (refcount >1).
+	     *	Its space in the file needs to be freed now, and it also needs
+	     *	to be removed from the metadata cache now, in case the space in
+	     *	the file is reused by another piece of metadata that is inserted
+	     *	into the cache before the indirect block's entry is evicted
+	     *	(having two entries at the same address would be an error, from
+	     *	the cache's perspective).
+	     */
+	    /* Lock indirect block for deletion */
+	    if(NULL == (del_iblock = H5HF__man_iblock_protect(hdr, iblock->addr, iblock->nrows, iblock->parent, iblock->par_entry, TRUE, H5AC__NO_FLAGS_SET, &did_protect)))
+		HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
+	    HDassert(did_protect == TRUE);
+
+	    /* Check for deleting root indirect block (and no root direct block) */
+	    if(iblock->block_off == 0 && hdr->man_dtable.curr_root_rows > 0)
+		/* Reset header information back to "empty heap" state */
+		if(H5HF__hdr_empty(hdr) < 0)
+		    HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't make heap empty")
+
+	    /* Detach from parent indirect block */
+	    if(iblock->parent) {
+		/* Destroy flush dependency between indirect block and parent */
+		if(H5AC_destroy_flush_dependency(iblock->fd_parent, iblock) < 0)
+		    HGOTO_ERROR(H5E_HEAP, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
+		iblock->fd_parent = NULL;
+
+		/* Detach from parent indirect block */
+		if(H5HF__man_iblock_detach(iblock->parent, iblock->par_entry) < 0)
+		    HGOTO_ERROR(H5E_HEAP, H5E_CANTATTACH, FAIL, "can't detach from parent indirect block")
+		iblock->parent = NULL;
+		iblock->par_entry = 0;
+	    } /* end if */
+	} /* end if */
+    } /* end if */
 
-    /* Decrement the reference count on this indirect block */
-    /* (should be last, so that potential 'unpin' on this indirect block
-     *  doesn't invalidate the 'iblock' variable)
+    /* Decrement the reference count on this indirect block if we're not deleting it */
+    /* (should be after iblock needs to be modified, so that potential 'unpin'
+     * on this indirect block doesn't invalidate the 'iblock' variable, if it's
+     * not being deleted)
      */
-    if(H5HF_iblock_decr(iblock) < 0)
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
+    if(H5HF__iblock_decr(iblock) < 0)
+	HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
+    iblock = NULL;
+
+    /* Delete indirect block from cache, if appropriate */
+    if(del_iblock) {
+	unsigned cache_flags = H5AC__NO_FLAGS_SET;	/* Flags for unprotect */
+	hbool_t took_ownership = FALSE;		/* Flag to indicate that block ownership has transitioned */
+
+	/* If the refcount is still >0, unpin the block and take ownership
+	 * 	from the cache, otherwise let the cache destroy it.
+	 */
+	if(del_iblock->rc > 0) {
+	    cache_flags |= (H5AC__DELETED_FLAG | H5AC__TAKE_OWNERSHIP_FLAG);
+	    cache_flags |= H5AC__UNPIN_ENTRY_FLAG;
+	    took_ownership = TRUE;
+	} /* end if */
+	else {
+	    /* Entry should be removed from the cache */
+	    cache_flags |= H5AC__DELETED_FLAG;
+
+	    /* If the indirect block is in real file space, tell
+	     * the cache to free its file space as well.
+	     */
+	    if(!H5F_IS_TMP_ADDR(hdr->f, del_iblock->addr))
+		cache_flags |= H5AC__FREE_FILE_SPACE_FLAG;
+	} /* end else */
+	
+	/* Unprotect the indirect block, with appropriate flags */
+	if(H5HF__man_iblock_unprotect(del_iblock, cache_flags, TRUE) < 0)
+	    HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
+
+	/* if took ownership, free file space & mark block as removed from cache */
+	if(took_ownership) {
+	    /* Free indirect block disk space, if it's in real space */
+	    if(!H5F_IS_TMP_ADDR(hdr->f, del_iblock->addr))
+		if(H5MF_xfree(hdr->f, H5FD_MEM_FHEAP_IBLOCK, del_iblock->addr, (hsize_t)del_iblock->size) < 0)
+		    HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to free fractal heap indirect block file space")
+	    del_iblock->addr = HADDR_UNDEF;
+
+	    /* Mark block as removed from the cache */
+	    del_iblock->removed_from_cache = TRUE;
+	} /* end if */
+    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_detach() */
+} /* end H5HF__man_iblock_detach() */
 
 
 /*-------------------------------------------------------------------------
@@ -1550,7 +1582,7 @@ H5HF_man_iblock_entry_addr(H5HF_indirect_t *iblock, unsigned entry, haddr_t *chi
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iblock_delete
+ * Function:	H5HF__man_iblock_delete
  *
  * Purpose:	Delete a managed indirect block
  *
@@ -1567,7 +1599,7 @@ H5HF_man_iblock_entry_addr(H5HF_indirect_t *iblock, unsigned entry, haddr_t *chi
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_delete(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
+H5HF__man_iblock_delete(H5HF_hdr_t *hdr, haddr_t iblock_addr,
     unsigned iblock_nrows, H5HF_indirect_t *par_iblock, unsigned par_entry)
 {
     H5HF_indirect_t *iblock;            /* Pointer to indirect block */
@@ -1577,7 +1609,7 @@ H5HF_man_iblock_delete(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
     hbool_t did_protect;                /* Whether we protected the indirect block or not */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1587,7 +1619,7 @@ H5HF_man_iblock_delete(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
     HDassert(iblock_nrows > 0);
 
     /* Lock indirect block */
-    if(NULL == (iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, iblock_nrows, par_iblock, par_entry, TRUE, H5AC__NO_FLAGS_SET, &did_protect)))
+    if(NULL == (iblock = H5HF__man_iblock_protect(hdr, iblock_addr, iblock_nrows, par_iblock, par_entry, TRUE, H5AC__NO_FLAGS_SET, &did_protect)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
     HDassert(iblock->nchildren > 0);
     HDassert(did_protect == TRUE);
@@ -1599,33 +1631,32 @@ H5HF_man_iblock_delete(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
         for(col = 0; col < hdr->man_dtable.cparam.width; col++, entry++) {
             /* Check for child entry at this position */
             if(H5F_addr_defined(iblock->ents[entry].addr)) {
-                hsize_t row_block_size;         /* The size of blocks in this row */
-
-                /* Get the row's block size */
-                row_block_size = (hsize_t)hdr->man_dtable.row_block_size[row];
-
                 /* Are we in a direct or indirect block row */
                 if(row < hdr->man_dtable.max_direct_rows) {
-                    hsize_t dblock_size;        /* Size of direct block on disk */
+		    hsize_t dblock_size;                /* Size of direct block on disk */
 
-                    /* Check for I/O filters on this heap */
-                    if(hdr->filter_len > 0)
-                        dblock_size = iblock->filt_ents[entry].size;
-                    else
-                        dblock_size = row_block_size;
+		    /* Check for I/O filters on this heap */
+		    if(hdr->filter_len > 0)
+			dblock_size = iblock->filt_ents[entry].size;
+		    else
+			dblock_size = hdr->man_dtable.row_block_size[row];
 
                     /* Delete child direct block */
-                    if(H5HF_man_dblock_delete(hdr->f, dxpl_id, iblock->ents[entry].addr, dblock_size) < 0)
+                    if(H5HF__man_dblock_delete(hdr->f, iblock->ents[entry].addr, dblock_size) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release fractal heap child direct block")
                 } /* end if */
                 else {
+		    hsize_t row_block_size;         /* The size of blocks in this row */
                     unsigned child_nrows;   /* Number of rows in new indirect block */
 
+		    /* Get the row's block size */
+		    row_block_size = (hsize_t)hdr->man_dtable.row_block_size[row];
+
                     /* Compute # of rows in next child indirect block to use */
                     child_nrows = H5HF_dtable_size_to_rows(&hdr->man_dtable, row_block_size);
 
                     /* Delete child indirect block */
-                    if(H5HF_man_iblock_delete(hdr, dxpl_id, iblock->ents[entry].addr, child_nrows, iblock, entry) < 0)
+                    if(H5HF__man_iblock_delete(hdr, iblock->ents[entry].addr, child_nrows, iblock, entry) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release fractal heap child indirect block")
                 } /* end else */
             } /* end if */
@@ -1656,16 +1687,16 @@ H5HF_man_iblock_delete(H5HF_hdr_t *hdr, hid_t dxpl_id, haddr_t iblock_addr,
 
 done:
     /* Unprotect the indirect block, with appropriate flags */
-    if(iblock && H5HF_man_iblock_unprotect(iblock, dxpl_id, cache_flags, did_protect) < 0)
+    if(iblock && H5HF__man_iblock_unprotect(iblock, cache_flags, did_protect) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_delete() */
+} /* end H5HF__man_iblock_delete() */
 
 
 /*-------------------------------------------------------------------------
  *
- * Function:    H5HF_man_iblock_size
+ * Function:    H5HF__man_iblock_size
  *
  * Purpose:     Gather storage used for the indirect block in fractal heap
  *
@@ -1676,14 +1707,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iblock_size(H5F_t *f, hid_t dxpl_id, H5HF_hdr_t *hdr, haddr_t iblock_addr,
+H5HF__man_iblock_size(H5F_t *f, H5HF_hdr_t *hdr, haddr_t iblock_addr,
     unsigned nrows, H5HF_indirect_t *par_iblock, unsigned par_entry, hsize_t *heap_size)
 {
     H5HF_indirect_t     *iblock = NULL;         /* Pointer to indirect block */
     hbool_t             did_protect;            /* Whether we protected the indirect block or not */
     herr_t              ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1694,7 +1725,7 @@ H5HF_man_iblock_size(H5F_t *f, hid_t dxpl_id, H5HF_hdr_t *hdr, haddr_t iblock_ad
     HDassert(heap_size);
 
     /* Protect the indirect block */
-    if(NULL == (iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, nrows, par_iblock, par_entry, FALSE, H5AC__READ_ONLY_FLAG, &did_protect)))
+    if(NULL == (iblock = H5HF__man_iblock_protect(hdr, iblock_addr, nrows, par_iblock, par_entry, FALSE, H5AC__READ_ONLY_FLAG, &did_protect)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to load fractal heap indirect block")
 
     /* Accumulate size of this indirect block */
@@ -1717,19 +1748,96 @@ H5HF_man_iblock_size(H5F_t *f, hid_t dxpl_id, H5HF_hdr_t *hdr, haddr_t iblock_ad
 
 	    for(v = 0; v < hdr->man_dtable.cparam.width; v++, entry++)
 		if(H5F_addr_defined(iblock->ents[entry].addr))
-		    if(H5HF_man_iblock_size(f, dxpl_id, hdr, iblock->ents[entry].addr, num_indirect_rows, iblock, entry, heap_size) < 0)
+		    if(H5HF__man_iblock_size(f, hdr, iblock->ents[entry].addr, num_indirect_rows, iblock, entry, heap_size) < 0)
 			HGOTO_ERROR(H5E_HEAP, H5E_CANTLOAD, FAIL, "unable to get fractal heap storage info for indirect block")
         } /* end for */
     } /* end if */
 
 done:
     /* Release the indirect block */
-    if(iblock && H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+    if(iblock && H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
     iblock = NULL;
 
    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iblock_size() */
+} /* end H5HF__man_iblock_size() */
+
+
+/*-------------------------------------------------------------------------
+ *
+ * Function:    H5HF_man_iblock_parent_info
+ *
+ * Purpose:     Determine the parent block's offset and entry location
+ *		(within it's parent) of an indirect block, given its offset
+ *		within the heap.
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@lbl.gov
+ *		Jan 14 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF__man_iblock_parent_info(const H5HF_hdr_t *hdr, hsize_t block_off,
+    hsize_t *ret_par_block_off, unsigned *ret_entry)
+{
+    hsize_t par_block_off;		/* Offset of parent within heap */
+    hsize_t prev_par_block_off;		/* Offset of previous parent block within heap */
+    unsigned row, col;              	/* Row & column for block */
+    unsigned prev_row = 0, prev_col = 0;/* Previous row & column for block */
+    herr_t ret_value = SUCCEED;		/* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /*
+     * Check arguments.
+     */
+    HDassert(hdr);
+    HDassert(block_off > 0);
+    HDassert(ret_entry);
+
+    /* Look up row & column for object */
+    if(H5HF_dtable_lookup(&hdr->man_dtable, block_off, &row, &col) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of block")
+
+    /* Sanity check - first lookup must be an indirect block */
+    HDassert(row >= hdr->man_dtable.max_direct_rows);
+
+    /* Traverse down, until a direct block at the offset is found, then 
+     *	use previous (i.e. parent's) offset, row, and column.
+     */
+    prev_par_block_off = par_block_off = 0;
+    while(row >= hdr->man_dtable.max_direct_rows) {
+	/* Retain previous parent block offset */
+	prev_par_block_off = par_block_off;
+
+        /* Compute the new parent indirect block's offset in the heap's address space */
+        /* (based on previous block offset) */
+        par_block_off += hdr->man_dtable.row_block_off[row];
+        par_block_off += hdr->man_dtable.row_block_size[row] * col;
+
+	/* Preserve current row & column */
+	prev_row = row;
+	prev_col = col;
+
+        /* Look up row & column in new indirect block for object */
+        if(H5HF_dtable_lookup(&hdr->man_dtable, (block_off - par_block_off), &row, &col) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of block")
+    } /* end while */
+
+    /* Sanity check */
+    HDassert(row == 0);
+    HDassert(col == 0);
+
+    /* Set return parameters */
+    *ret_par_block_off = prev_par_block_off;
+    *ret_entry = (prev_row * hdr->man_dtable.cparam.width) + prev_col;
+
+done:
+   FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF__man_iblock_par_info() */
 
 
 /*-------------------------------------------------------------------------
@@ -1763,7 +1871,7 @@ H5HF_man_iblock_dest(H5HF_indirect_t *iblock)
     if(H5HF_hdr_decr(iblock->hdr) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared heap header")
     if(iblock->parent)
-        if(H5HF_iblock_decr(iblock->parent) < 0)
+        if(H5HF__iblock_decr(iblock->parent) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
 
     /* Release entry tables */
diff --git a/src/H5HFiter.c b/src/H5HFiter.c
index 55a8532..ceebc3b 100644
--- a/src/H5HFiter.c
+++ b/src/H5HFiter.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -111,7 +109,7 @@ H5HF_man_iter_init(H5HF_block_iter_t *biter)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_iter_start_offset
+ * Function:	H5HF__man_iter_start_offset
  *
  * Purpose:	Initialize a block iterator to a particular location, given
  *              an offset in the heap
@@ -125,8 +123,8 @@ H5HF_man_iter_init(H5HF_block_iter_t *biter)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_iter_start_offset(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_block_iter_t *biter, hsize_t offset)
+H5HF__man_iter_start_offset(H5HF_hdr_t *hdr, H5HF_block_iter_t *biter,
+    hsize_t offset)
 {
     H5HF_indirect_t *iblock;        /* Indirect block for location context */
     haddr_t iblock_addr;            /* Address of indirect block */
@@ -139,7 +137,7 @@ H5HF_man_iter_start_offset(H5HF_hdr_t *hdr, hid_t dxpl_id,
     hbool_t root_block = TRUE;  /* Flag to indicate the current block is the root indirect block */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -218,7 +216,7 @@ H5HF_man_iter_start_offset(H5HF_hdr_t *hdr, hid_t dxpl_id,
         } /* end else */
 
         /* Load indirect block for this context location */
-        if(NULL == (iblock = H5HF_man_iblock_protect(hdr, dxpl_id, iblock_addr, iblock_nrows, iblock_parent, iblock_par_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
+        if(NULL == (iblock = H5HF__man_iblock_protect(hdr, iblock_addr, iblock_nrows, iblock_parent, iblock_par_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
 
         /* Make indirect block the context for the current location */
@@ -229,7 +227,7 @@ H5HF_man_iter_start_offset(H5HF_hdr_t *hdr, hid_t dxpl_id,
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINC, FAIL, "can't increment reference count on shared indirect block")
 
         /* Release the current indirect block */
-        if(H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+        if(H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
         iblock = NULL;
 
@@ -263,7 +261,7 @@ H5HF_man_iter_start_offset(H5HF_hdr_t *hdr, hid_t dxpl_id,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_iter_start_offset() */
+} /* end H5HF__man_iter_start_offset() */
 
 
 /*-------------------------------------------------------------------------
@@ -397,7 +395,7 @@ H5HF_man_iter_reset(H5HF_block_iter_t *biter)
 
             /* If this node is holding an indirect block, release the block */
             if(curr_loc->context)
-                if(H5HF_iblock_decr(curr_loc->context) < 0)
+                if(H5HF__iblock_decr(curr_loc->context) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
 
             /* Free the current location context */
@@ -486,7 +484,7 @@ H5HF_man_iter_up(H5HF_block_iter_t *biter)
     HDassert(biter->curr->context);
 
     /* Release hold on current location's indirect block */
-    if(H5HF_iblock_decr(biter->curr->context) < 0)
+    if(H5HF__iblock_decr(biter->curr->context) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
 
     /* Get pointer to location context above this one */
diff --git a/src/H5HFman.c b/src/H5HFman.c
index cff4395..394bcff 100644
--- a/src/H5HFman.c
+++ b/src/H5HFman.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -72,8 +70,8 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    const uint8_t *id, H5HF_operator_t op, void *op_data, unsigned op_flags);
+static herr_t H5HF__man_op_real(H5HF_hdr_t *hdr, const uint8_t *id,
+    H5HF_operator_t op, void *op_data, unsigned op_flags);
 
 /*********************/
 /* Package Variables */
@@ -92,7 +90,7 @@ static herr_t H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id,
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_insert
+ * Function:	H5HF__man_insert
  *
  * Purpose:	Insert an object in a managed direct block
  *
@@ -105,8 +103,7 @@ static herr_t H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, const void *obj,
-    void *_id)
+H5HF__man_insert(H5HF_hdr_t *hdr, size_t obj_size, const void *obj, void *_id)
 {
     H5HF_free_section_t *sec_node = NULL;   /* Pointer to free space section */
     H5HF_direct_t *dblock = NULL;       /* Pointer to direct block to modify */
@@ -117,7 +114,7 @@ H5HF_man_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, const void *obj
     htri_t node_found;                  /* Whether an existing free list node was found */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -131,30 +128,28 @@ H5HF_man_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, const void *obj
     H5HF_MAN_WRITE_CHECK_PLINE(hdr)
 
     /* Look for free space */
-    if((node_found = H5HF_space_find(hdr, dxpl_id, (hsize_t)obj_size, &sec_node)) < 0)
+    if((node_found = H5HF__space_find(hdr, (hsize_t)obj_size, &sec_node)) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't locate free space in fractal heap")
 
     /* If we didn't find a node, go create a direct block big enough to hold the requested block */
     if(!node_found)
         /* Allocate direct block big enough to hold requested size */
-        if(H5HF_man_dblock_new(hdr, dxpl_id, obj_size, &sec_node) < 0)
+        if(H5HF__man_dblock_new(hdr, obj_size, &sec_node) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCREATE, FAIL, "can't create fractal heap direct block")
 
     /* Check for row section */
     if(sec_node->sect_info.type == H5HF_FSPACE_SECT_FIRST_ROW ||
             sec_node->sect_info.type == H5HF_FSPACE_SECT_NORMAL_ROW) {
-
         /* Allocate 'single' selection out of 'row' selection */
-        if(H5HF_man_iblock_alloc_row(hdr, dxpl_id, &sec_node) < 0)
+        if(H5HF__man_iblock_alloc_row(hdr, &sec_node) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't break up row section")
     } /* end if */
     HDassert(sec_node->sect_info.type == H5HF_FSPACE_SECT_SINGLE);
 
     /* Check for 'single' section being serialized */
-    if(sec_node->sect_info.state == H5FS_SECT_SERIALIZED) {
-        if(H5HF_sect_single_revive(hdr, dxpl_id, sec_node) < 0)
+    if(sec_node->sect_info.state == H5FS_SECT_SERIALIZED)
+        if(H5HF__sect_single_revive(hdr, sec_node) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't revive single free section")
-    } /* end if */
     HDassert(sec_node->sect_info.state == H5FS_SECT_LIVE);
 
     /* Retrieve direct block address from section */
@@ -162,7 +157,7 @@ H5HF_man_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, const void *obj
         HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't retrieve direct block information")
 
     /* Lock direct block */
-    if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, dblock_addr, dblock_size, sec_node->u.single.parent, sec_node->u.single.par_entry, H5AC__NO_FLAGS_SET)))
+    if(NULL == (dblock = H5HF__man_dblock_protect(hdr, dblock_addr, dblock_size, sec_node->u.single.parent, sec_node->u.single.par_entry, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to load fractal heap direct block")
 
     /* Insert object into block */
@@ -175,7 +170,7 @@ H5HF_man_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, const void *obj
     HDassert(sec_node->sect_info.size >= obj_size);
 
     /* Reduce (& possibly re-add) single section */
-    if(H5HF_sect_single_reduce(hdr, dxpl_id, sec_node, obj_size) < 0)
+    if(H5HF__sect_single_reduce(hdr, sec_node, obj_size) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't reduce single section node")
     sec_node = NULL;
 
@@ -207,15 +202,15 @@ H5HF_man_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size, const void *obj
 done:
     /* Release section node on error */
     if(ret_value < 0)
-        if(sec_node && H5HF_sect_single_free((H5FS_section_info_t *)sec_node) < 0)
+        if(sec_node && H5HF__sect_single_free((H5FS_section_info_t *)sec_node) < 0)
             HDONE_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release section node")
 
     /* Release the direct block (marked as dirty) */
-    if(dblock && H5AC_unprotect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__DIRTIED_FLAG) < 0)
+    if(dblock && H5AC_unprotect(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__DIRTIED_FLAG) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap direct block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_insert() */
+} /* end H5HF__man_insert() */
 
 
 /*-------------------------------------------------------------------------
@@ -292,7 +287,7 @@ H5HF__man_get_obj_off(const H5HF_hdr_t *hdr, const uint8_t *id, hsize_t *obj_off
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_op_real
+ * Function:	H5HF__man_op_real
  *
  * Purpose:	Internal routine to perform an operation on a managed heap
  *              object
@@ -306,7 +301,7 @@ H5HF__man_get_obj_off(const H5HF_hdr_t *hdr, const uint8_t *id, hsize_t *obj_off
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
+H5HF__man_op_real(H5HF_hdr_t *hdr, const uint8_t *id,
     H5HF_operator_t op, void *op_data, unsigned op_flags)
 {
     H5HF_direct_t *dblock = NULL;       /* Pointer to direct block to query */
@@ -324,7 +319,7 @@ H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
     uint8_t *p;                         /* Temporary pointer to obj info in block */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -372,7 +367,7 @@ H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         dblock_size = hdr->man_dtable.cparam.start_block_size;
 
         /* Lock direct block */
-        if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, dblock_addr, dblock_size, NULL, 0, dblock_access_flags)))
+        if(NULL == (dblock = H5HF__man_dblock_protect(hdr, dblock_addr, dblock_size, NULL, 0, dblock_access_flags)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap direct block")
     } /* end if */
     else {
@@ -381,7 +376,7 @@ H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         unsigned entry;                 /* Entry of block */
 
         /* Look up indirect block containing direct block */
-        if(H5HF_man_dblock_locate(hdr, dxpl_id, obj_off, &iblock, &entry, &did_protect, H5AC__READ_ONLY_FLAG) < 0)
+        if(H5HF__man_dblock_locate(hdr, obj_off, &iblock, &entry, &did_protect, H5AC__READ_ONLY_FLAG) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of section")
 
         /* Set direct block info */
@@ -392,23 +387,23 @@ H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
         /* Check for offset of invalid direct block */
         if(!H5F_addr_defined(dblock_addr)) {
             /* Unlock indirect block */
-            if(H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+            if(H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
             HGOTO_ERROR(H5E_HEAP, H5E_BADRANGE, FAIL, "fractal heap ID not in allocated direct block")
         } /* end if */
 
         /* Lock direct block */
-        if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, dblock_addr, dblock_size, iblock, entry, dblock_access_flags))) {
+        if(NULL == (dblock = H5HF__man_dblock_protect(hdr, dblock_addr, dblock_size, iblock, entry, dblock_access_flags))) {
             /* Unlock indirect block */
-            if(H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+            if(H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap direct block")
         } /* end if */
 
         /* Unlock indirect block */
-        if(H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+        if(H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
         iblock = NULL;
     } /* end else */
@@ -434,15 +429,15 @@ H5HF_man_op_real(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
 
 done:
     /* Unlock direct block */
-    if(dblock && H5AC_unprotect(hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, dblock_cache_flags) < 0)
+    if(dblock && H5AC_unprotect(hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, dblock_cache_flags) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap direct block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_op_real() */
+} /* end H5HF__man_op_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_read
+ * Function:	H5HF__man_read
  *
  * Purpose:	Read an object from a managed heap
  *
@@ -455,11 +450,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_read(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id, void *obj)
+H5HF__man_read(H5HF_hdr_t *hdr, const uint8_t *id, void *obj)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -469,16 +464,16 @@ H5HF_man_read(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id, void *obj)
     HDassert(obj);
 
     /* Call the internal 'op' routine routine */
-    if(H5HF_man_op_real(hdr, dxpl_id, id, H5HF_op_read, obj, 0) < 0)
+    if(H5HF__man_op_real(hdr, id, H5HF_op_read, obj, 0) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTOPERATE, FAIL, "unable to operate on heap object")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_read() */
+} /* end H5HF__man_read() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_write
+ * Function:	H5HF__man_write
  *
  * Purpose:	Write an object to a managed heap
  *
@@ -491,12 +486,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    const void *obj)
+H5HF__man_write(H5HF_hdr_t *hdr, const uint8_t *id, const void *obj)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -507,16 +501,16 @@ H5HF_man_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
 
     /* Call the internal 'op' routine routine */
     /* (Casting away const OK - QAK) */
-    if(H5HF_man_op_real(hdr, dxpl_id, id, H5HF_op_write, (void *)obj, H5HF_OP_MODIFY) < 0)
+    if(H5HF__man_op_real(hdr, id, H5HF_op_write, (void *)obj, H5HF_OP_MODIFY) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTOPERATE, FAIL, "unable to operate on heap object")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_write() */
+} /* end H5HF__man_write() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_op
+ * Function:	H5HF__man_op
  *
  * Purpose:	Operate directly on an object from a managed heap
  *
@@ -529,12 +523,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    H5HF_operator_t op, void *op_data)
+H5HF__man_op(H5HF_hdr_t *hdr, const uint8_t *id, H5HF_operator_t op, void *op_data)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -544,16 +537,16 @@ H5HF_man_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
     HDassert(op);
 
     /* Call the internal 'op' routine routine */
-    if(H5HF_man_op_real(hdr, dxpl_id, id, op, op_data, 0) < 0)
+    if(H5HF__man_op_real(hdr, id, op, op_data, 0) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTOPERATE, FAIL, "unable to operate on heap object")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_op() */
+} /* end H5HF__man_op() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_man_remove
+ * Function:	H5HF__man_remove
  *
  * Purpose:	Remove an object from a managed heap
  *
@@ -566,7 +559,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_man_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
+H5HF__man_remove(H5HF_hdr_t *hdr, const uint8_t *id)
 {
     H5HF_free_section_t *sec_node = NULL; /* Pointer to free space section for block */
     H5HF_indirect_t *iblock = NULL;     /* Pointer to indirect block */
@@ -579,7 +572,7 @@ H5HF_man_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
     size_t blk_off;                     /* Offset of object in block */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -618,7 +611,7 @@ H5HF_man_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
     } /* end if */
     else {
         /* Look up indirect block containing direct block */
-        if(H5HF_man_dblock_locate(hdr, dxpl_id, obj_off, &iblock, &dblock_entry, &did_protect, H5AC__NO_FLAGS_SET) < 0)
+        if(H5HF__man_dblock_locate(hdr, obj_off, &iblock, &dblock_entry, &did_protect, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of section")
 
         /* Check for offset of invalid direct block */
@@ -654,7 +647,7 @@ H5HF_man_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
 
     /* Unlock indirect block */
     if(iblock) {
-        if(H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+        if(H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
         iblock = NULL;
     } /* end if */
@@ -667,21 +660,21 @@ H5HF_man_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id)
     hdr->man_nobjs--;
 
     /* Return free space to the heap's list of space */
-    if(H5HF_space_add(hdr, dxpl_id, sec_node, H5FS_ADD_RETURNED_SPACE) < 0)
+    if(H5HF__space_add(hdr, sec_node, H5FS_ADD_RETURNED_SPACE) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add direct block free space to global list")
     sec_node = NULL;
 
 done:
     if(ret_value < 0) {
         /* Release section node */
-        if(sec_node && H5HF_sect_single_free((H5FS_section_info_t *)sec_node) < 0)
+        if(sec_node && H5HF__sect_single_free((H5FS_section_info_t *)sec_node) < 0)
             HDONE_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "unable to release section node")
     } /* end if */
 
     /* Unlock indirect block */
-    if(iblock && H5HF_man_iblock_unprotect(iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+    if(iblock && H5HF__man_iblock_unprotect(iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_man_remove() */
+} /* end H5HF__man_remove() */
 
diff --git a/src/H5HFmodule.h b/src/H5HFmodule.h
index e3274ce..dd6576a 100644
--- a/src/H5HFmodule.h
+++ b/src/H5HFmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5HFpkg.h b/src/H5HFpkg.h
index 9c1d9a6..b38a897 100644
--- a/src/H5HFpkg.h
+++ b/src/H5HFpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -384,8 +382,7 @@ struct H5HF_indirect_t {
     size_t      rc;             /* Reference count of objects using this block */
     H5HF_hdr_t	*hdr;	        /* Shared heap header info	              */
     struct H5HF_indirect_t *parent;	/* Shared parent indirect block info  */
-    struct H5HF_indirect_t 
-		*fd_parent;	/* Saved copy of the parent pointer -- this   */
+    void        *fd_parent;	/* Saved copy of the parent pointer -- this   */
 				/* necessary as the parent field is sometimes */
 				/* nulled out before the eviction notify call */
 				/* is made from the metadata cache.  Since    */
@@ -399,6 +396,10 @@ struct H5HF_indirect_t {
     unsigned    nchildren;      /* Number of child blocks                     */
     unsigned    max_child;      /* Max. offset used in child entries          */
     struct H5HF_indirect_t **child_iblocks; /* Array of pointers to pinned child indirect blocks */
+    hbool_t     removed_from_cache;     /* Flag that indicates the block has  */
+                                /* been removed from the metadata cache, but  */
+                                /* is still 'live' due to a refcount (rc) > 0 */
+                                /* (usually from free space sections)         */
 
     /* Stored values */
     hsize_t     block_off;      /* Offset of the block within the heap's address space */
@@ -414,7 +415,7 @@ typedef struct H5HF_direct_t {
     /* Internal heap information */
     H5HF_hdr_t	*hdr;	        /* Shared heap header info	              */
     H5HF_indirect_t *parent;	/* Shared parent indirect block info          */
-    H5HF_indirect_t *fd_parent;	/* Saved copy of the parent pointer -- this   */
+    void        *fd_parent;	/* Saved copy of the parent pointer -- this   */
 				/* necessary as the parent field is sometimes */
 				/* nulled out before the eviction notify call */
 				/* is made from the metadata cache.  Since    */
@@ -500,20 +501,17 @@ typedef struct H5HF_huge_bt2_filt_dir_rec_t {
 /* User data for free space section 'add' callback */
 typedef struct {
     H5HF_hdr_t *hdr;            /* Fractal heap header */
-    hid_t dxpl_id;              /* DXPL ID for operation */
 } H5HF_sect_add_ud_t;
 
 /* User data for v2 B-tree 'remove' callback on 'huge' objects */
 typedef struct {
     H5HF_hdr_t *hdr;            /* Fractal heap header (in) */
-    hid_t dxpl_id;              /* DXPL ID for operation (in) */
     hsize_t obj_len;            /* Length of object removed (out) */
 } H5HF_huge_remove_ud_t;
 
 /* User data for fractal heap header cache client callback */
 typedef struct H5HF_hdr_cache_ud_t {
     H5F_t *f;                   /* File pointer */
-    hid_t dxpl_id;              /* DXPL ID for operation (in) */
 } H5HF_hdr_cache_ud_t;
 
 /* User data for fractal heap indirect block cache client callbacks */
@@ -619,9 +617,8 @@ H5_DLL hsize_t H5HF_dtable_span_size(const H5HF_dtable_t *dtable, unsigned start
 
 /* Heap header routines */
 H5_DLL H5HF_hdr_t * H5HF_hdr_alloc(H5F_t *f);
-H5_DLL haddr_t H5HF_hdr_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam);
-H5_DLL H5HF_hdr_t *H5HF_hdr_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    unsigned flags);
+H5_DLL haddr_t H5HF_hdr_create(H5F_t *f, const H5HF_create_t *cparam);
+H5_DLL H5HF_hdr_t *H5HF__hdr_protect(H5F_t *f, haddr_t addr, unsigned flags);
 H5_DLL herr_t H5HF_hdr_finish_init_phase1(H5HF_hdr_t *hdr);
 H5_DLL herr_t H5HF_hdr_finish_init_phase2(H5HF_hdr_t *hdr);
 H5_DLL herr_t H5HF_hdr_finish_init(H5HF_hdr_t *hdr);
@@ -634,100 +631,95 @@ H5_DLL herr_t H5HF_hdr_adj_free(H5HF_hdr_t *hdr, ssize_t amt);
 H5_DLL herr_t H5HF_hdr_adjust_heap(H5HF_hdr_t *hdr, hsize_t new_size, hssize_t extra_free);
 H5_DLL herr_t H5HF_hdr_inc_alloc(H5HF_hdr_t *hdr, size_t alloc_size);
 H5_DLL herr_t H5HF_hdr_start_iter(H5HF_hdr_t *hdr, H5HF_indirect_t *iblock, hsize_t curr_off, unsigned curr_entry);
-H5_DLL herr_t H5HF_hdr_skip_blocks(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_indirect_t *iblock, unsigned start_entry, unsigned nentries);
-H5_DLL herr_t H5HF_hdr_update_iter(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t min_dblock_size);
+H5_DLL herr_t H5HF__hdr_skip_blocks(H5HF_hdr_t *hdr, H5HF_indirect_t *iblock,
+    unsigned start_entry, unsigned nentries);
+H5_DLL herr_t H5HF__hdr_update_iter(H5HF_hdr_t *hdr, size_t min_dblock_size);
 H5_DLL herr_t H5HF_hdr_inc_iter(H5HF_hdr_t *hdr, hsize_t adv_size, unsigned nentries);
-H5_DLL herr_t H5HF_hdr_reverse_iter(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t dblock_addr);
+H5_DLL herr_t H5HF__hdr_reverse_iter(H5HF_hdr_t *hdr, haddr_t dblock_addr);
 H5_DLL herr_t H5HF_hdr_reset_iter(H5HF_hdr_t *hdr, hsize_t curr_off);
-H5_DLL herr_t H5HF_hdr_empty(H5HF_hdr_t *hdr);
+H5_DLL herr_t H5HF__hdr_empty(H5HF_hdr_t *hdr);
 H5_DLL herr_t H5HF_hdr_free(H5HF_hdr_t *hdr);
-H5_DLL herr_t H5HF_hdr_delete(H5HF_hdr_t *hdr, hid_t dxpl_id);
+H5_DLL herr_t H5HF__hdr_delete(H5HF_hdr_t *hdr);
 H5_DLL herr_t H5HF_hdr_dest(H5HF_hdr_t *hdr);
 
 /* Indirect block routines */
 H5_DLL herr_t H5HF_iblock_incr(H5HF_indirect_t *iblock);
-H5_DLL herr_t H5HF_iblock_decr(H5HF_indirect_t *iblock);
+H5_DLL herr_t H5HF__iblock_decr(H5HF_indirect_t *iblock);
 H5_DLL herr_t H5HF_iblock_dirty(H5HF_indirect_t *iblock);
-H5_DLL herr_t H5HF_man_iblock_root_create(H5HF_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5HF__man_iblock_root_create(H5HF_hdr_t *hdr, 
     size_t min_dblock_size);
-H5_DLL herr_t H5HF_man_iblock_root_double(H5HF_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5HF__man_iblock_root_double(H5HF_hdr_t *hdr, 
     size_t min_dblock_size);
-H5_DLL herr_t H5HF_man_iblock_alloc_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5HF__man_iblock_alloc_row(H5HF_hdr_t *hdr,
     H5HF_free_section_t **sec_node);
-H5_DLL herr_t H5HF_man_iblock_create(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_indirect_t *par_iblock, unsigned par_entry, unsigned nrows,
-    unsigned max_rows, haddr_t *addr_p);
-H5_DLL H5HF_indirect_t *H5HF_man_iblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t iblock_addr, unsigned iblock_nrows,
-    H5HF_indirect_t *par_iblock, unsigned par_entry, hbool_t must_protect,
-    unsigned flags, hbool_t *did_protect);
-H5_DLL herr_t H5HF_man_iblock_unprotect(H5HF_indirect_t *iblock, hid_t dxpl_id,
-    unsigned cache_flags, hbool_t did_protect);
+H5_DLL herr_t H5HF__man_iblock_create(H5HF_hdr_t *hdr, H5HF_indirect_t *par_iblock,
+    unsigned par_entry, unsigned nrows, unsigned max_rows, haddr_t *addr_p);
+H5_DLL H5HF_indirect_t *H5HF__man_iblock_protect(H5HF_hdr_t *hdr, haddr_t iblock_addr,
+    unsigned iblock_nrows, H5HF_indirect_t *par_iblock, unsigned par_entry,
+    hbool_t must_protect, unsigned flags, hbool_t *did_protect);
+H5_DLL herr_t H5HF__man_iblock_unprotect(H5HF_indirect_t *iblock, unsigned cache_flags,
+    hbool_t did_protect);
 H5_DLL herr_t H5HF_man_iblock_attach(H5HF_indirect_t *iblock, unsigned entry,
     haddr_t dblock_addr);
-H5_DLL herr_t H5HF_man_iblock_detach(H5HF_indirect_t *iblock, hid_t dxpl_id, unsigned entry);
+H5_DLL herr_t H5HF__man_iblock_detach(H5HF_indirect_t *iblock, unsigned entry);
 H5_DLL herr_t H5HF_man_iblock_entry_addr(H5HF_indirect_t *iblock, unsigned entry,
     haddr_t *child_addr);
-H5_DLL herr_t H5HF_man_iblock_delete(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t iblock_addr, unsigned iblock_nrows, H5HF_indirect_t *par_iblock,
-    unsigned par_entry);
-H5_DLL herr_t H5HF_man_iblock_size(H5F_t *f, hid_t dxpl_id, H5HF_hdr_t *hdr,
+H5_DLL herr_t H5HF__man_iblock_delete(H5HF_hdr_t *hdr, haddr_t iblock_addr,
+    unsigned iblock_nrows, H5HF_indirect_t *par_iblock, unsigned par_entry);
+H5_DLL herr_t H5HF__man_iblock_size(H5F_t *f, H5HF_hdr_t *hdr,
     haddr_t iblock_addr, unsigned nrows, H5HF_indirect_t *par_iblock, unsigned par_entry, hsize_t *heap_size/*out*/);
+H5_DLL herr_t H5HF__man_iblock_parent_info(const H5HF_hdr_t *hdr,
+    hsize_t block_off, hsize_t *ret_par_block_off, unsigned *ret_entry);
 H5_DLL herr_t H5HF_man_iblock_dest(H5HF_indirect_t *iblock);
 
 /* Direct block routines */
-H5_DLL herr_t H5HF_man_dblock_new(H5HF_hdr_t *fh, hid_t dxpl_id, size_t request,
+H5_DLL herr_t H5HF__man_dblock_new(H5HF_hdr_t *fh, size_t request,
     H5HF_free_section_t **ret_sec_node);
-H5_DLL herr_t H5HF_man_dblock_create(hid_t dxpl_id, H5HF_hdr_t *hdr,
+H5_DLL herr_t H5HF__man_dblock_create(H5HF_hdr_t *hdr,
     H5HF_indirect_t *par_iblock, unsigned par_entry, haddr_t *addr_p,
     H5HF_free_section_t **ret_sec_node);
-H5_DLL herr_t H5HF_man_dblock_destroy(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_direct_t *dblock, haddr_t dblock_addr);
-H5_DLL H5HF_direct_t *H5HF_man_dblock_protect(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    haddr_t dblock_addr, size_t dblock_size,
-    H5HF_indirect_t *par_iblock, unsigned par_entry,
+H5_DLL herr_t H5HF__man_dblock_destroy(H5HF_hdr_t *hdr, H5HF_direct_t *dblock,
+    haddr_t dblock_addr, hbool_t *parent_removed);
+H5_DLL H5HF_direct_t *H5HF__man_dblock_protect(H5HF_hdr_t *hdr, haddr_t dblock_addr,
+    size_t dblock_size, H5HF_indirect_t *par_iblock, unsigned par_entry,
+    unsigned flags);
+H5_DLL herr_t H5HF__man_dblock_locate(H5HF_hdr_t *hdr, hsize_t obj_off,
+    H5HF_indirect_t **par_iblock, unsigned *par_entry, hbool_t *par_did_protect,
     unsigned flags);
-H5_DLL herr_t H5HF_man_dblock_locate(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    hsize_t obj_off, H5HF_indirect_t **par_iblock,
-    unsigned *par_entry, hbool_t *par_did_protect, unsigned flags);
-H5_DLL herr_t H5HF_man_dblock_delete(H5F_t *f, hid_t dxpl_id, haddr_t dblock_addr,
+H5_DLL herr_t H5HF__man_dblock_delete(H5F_t *f, haddr_t dblock_addr,
     hsize_t dblock_size);
 H5_DLL herr_t H5HF_man_dblock_dest(H5HF_direct_t *dblock);
 
 /* Managed object routines */
-H5_DLL herr_t H5HF_man_insert(H5HF_hdr_t *fh, hid_t dxpl_id, size_t obj_size,
+H5_DLL herr_t H5HF__man_insert(H5HF_hdr_t *fh, size_t obj_size,
     const void *obj, void *id);
 H5_DLL herr_t H5HF_man_get_obj_len(H5HF_hdr_t *hdr, const uint8_t *id,
     size_t *obj_len_p);
 H5_DLL void H5HF__man_get_obj_off(const H5HF_hdr_t *hdr, const uint8_t *id,
     hsize_t *obj_off_p);
-H5_DLL herr_t H5HF_man_read(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id,
-    void *obj);
-H5_DLL herr_t H5HF_man_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    const void *obj);
-H5_DLL herr_t H5HF_man_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
-    H5HF_operator_t op, void *op_data);
-H5_DLL herr_t H5HF_man_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id);
+H5_DLL herr_t H5HF__man_read(H5HF_hdr_t *fh, const uint8_t *id, void *obj);
+H5_DLL herr_t H5HF__man_write(H5HF_hdr_t *hdr, const uint8_t *id, const void *obj);
+H5_DLL herr_t H5HF__man_op(H5HF_hdr_t *hdr, const uint8_t *id, H5HF_operator_t op,
+    void *op_data);
+H5_DLL herr_t H5HF__man_remove(H5HF_hdr_t *hdr, const uint8_t *id);
 
 /* 'Huge' object routines */
 H5_DLL herr_t H5HF_huge_init(H5HF_hdr_t *hdr);
-H5_DLL herr_t H5HF_huge_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size,
+H5_DLL herr_t H5HF__huge_insert(H5HF_hdr_t *hdr, size_t obj_size,
     void *obj, void *id);
-H5_DLL herr_t H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    const uint8_t *id, size_t *obj_len_p);
-H5_DLL herr_t H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    const uint8_t *id, hsize_t *obj_off_p);
-H5_DLL herr_t H5HF_huge_read(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id,
+H5_DLL herr_t H5HF__huge_get_obj_len(H5HF_hdr_t *hdr, const uint8_t *id,
+    size_t *obj_len_p);
+H5_DLL herr_t H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, const uint8_t *id,
+    hsize_t *obj_off_p);
+H5_DLL herr_t H5HF__huge_read(H5HF_hdr_t *fh, const uint8_t *id,
     void *obj);
-H5_DLL herr_t H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
+H5_DLL herr_t H5HF__huge_write(H5HF_hdr_t *hdr, const uint8_t *id,
     const void *obj);
-H5_DLL herr_t H5HF_huge_op(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
+H5_DLL herr_t H5HF__huge_op(H5HF_hdr_t *hdr, const uint8_t *id,
     H5HF_operator_t op, void *op_data);
-H5_DLL herr_t H5HF_huge_remove(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id);
-H5_DLL herr_t H5HF_huge_term(H5HF_hdr_t *hdr, hid_t dxpl_id);
-H5_DLL herr_t H5HF_huge_delete(H5HF_hdr_t *hdr, hid_t dxpl_id);
+H5_DLL herr_t H5HF__huge_remove(H5HF_hdr_t *fh, const uint8_t *id);
+H5_DLL herr_t H5HF__huge_term(H5HF_hdr_t *hdr);
+H5_DLL herr_t H5HF__huge_delete(H5HF_hdr_t *hdr);
 
 /* 'Huge' object v2 B-tree function callbacks */
 H5_DLL herr_t H5HF__huge_bt2_indir_found(const void *nrecord, void *op_data);
@@ -750,21 +742,21 @@ H5_DLL herr_t H5HF_tiny_op(H5HF_hdr_t *hdr, const uint8_t *id,
 H5_DLL herr_t H5HF_tiny_remove(H5HF_hdr_t *fh, const uint8_t *id);
 
 /* Debugging routines for dumping file structures */
-H5_DLL void H5HF_hdr_print(const H5HF_hdr_t *hdr, hid_t dxpl_id,
-    hbool_t dump_internal, FILE *stream, int indent, int fwidth);
-H5_DLL herr_t H5HF_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+H5_DLL void H5HF_hdr_print(const H5HF_hdr_t *hdr, hbool_t dump_internal,
     FILE *stream, int indent, int fwidth);
-H5_DLL herr_t H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+H5_DLL herr_t H5HF_hdr_debug(H5F_t *f, haddr_t addr,
+    FILE *stream, int indent, int fwidth);
+H5_DLL herr_t H5HF_dblock_debug(H5F_t *f, haddr_t addr,
     FILE *stream, int indent, int fwidth, haddr_t hdr_addr, size_t nrec);
 H5_DLL void H5HF_iblock_print(const H5HF_indirect_t *iblock, hbool_t dump_internal,
     FILE *stream, int indent, int fwidth);
-H5_DLL herr_t H5HF_iblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
+H5_DLL herr_t H5HF_iblock_debug(H5F_t *f, haddr_t addr,
     FILE *stream, int indent, int fwidth, haddr_t hdr_addr, unsigned nrows);
 
 /* Block iteration routines */
 H5_DLL herr_t H5HF_man_iter_init(H5HF_block_iter_t *biter);
-H5_DLL herr_t H5HF_man_iter_start_offset(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_block_iter_t *biter, hsize_t offset);
+H5_DLL herr_t H5HF__man_iter_start_offset(H5HF_hdr_t *hdr, H5HF_block_iter_t *biter,
+    hsize_t offset);
 H5_DLL herr_t H5HF_man_iter_start_entry(H5HF_hdr_t *hdr, H5HF_block_iter_t *biter,
     H5HF_indirect_t *iblock, unsigned start_entry);
 H5_DLL herr_t H5HF_man_iter_set_entry(const H5HF_hdr_t *hdr,
@@ -781,39 +773,36 @@ H5_DLL herr_t H5HF_man_iter_offset(H5HF_hdr_t *hdr, H5HF_block_iter_t *biter,
 H5_DLL hbool_t H5HF_man_iter_ready(H5HF_block_iter_t *biter);
 
 /* Free space manipulation routines */
-H5_DLL herr_t H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t may_create);
-H5_DLL herr_t H5HF_space_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *node, unsigned flags);
-H5_DLL htri_t H5HF_space_find(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t request,
+H5_DLL herr_t H5HF__space_start(H5HF_hdr_t *hdr, hbool_t may_create);
+H5_DLL herr_t H5HF__space_add(H5HF_hdr_t *hdr, H5HF_free_section_t *node,
+    unsigned flags);
+H5_DLL htri_t H5HF__space_find(H5HF_hdr_t *hdr, hsize_t request,
     H5HF_free_section_t **node);
-H5_DLL herr_t H5HF_space_revert_root(const H5HF_hdr_t *hdr, hid_t dxpl_id);
-H5_DLL herr_t H5HF_space_create_root(const H5HF_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5HF__space_revert_root(const H5HF_hdr_t *hdr);
+H5_DLL herr_t H5HF__space_create_root(const H5HF_hdr_t *hdr, 
     H5HF_indirect_t *root_iblock);
-H5_DLL herr_t H5HF_space_size(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t *fs_size);
-H5_DLL herr_t H5HF_space_remove(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *node);
-H5_DLL herr_t H5HF_space_close(H5HF_hdr_t *hdr, hid_t dxpl_id);
-H5_DLL herr_t H5HF_space_delete(H5HF_hdr_t *hdr, hid_t dxpl_id);
-H5_DLL herr_t H5HF_space_sect_change_class(H5HF_hdr_t *hdr, hid_t dxpl_id,
+H5_DLL herr_t H5HF__space_size(H5HF_hdr_t *hdr, hsize_t *fs_size);
+H5_DLL herr_t H5HF__space_remove(H5HF_hdr_t *hdr, H5HF_free_section_t *node);
+H5_DLL herr_t H5HF__space_close(H5HF_hdr_t *hdr);
+H5_DLL herr_t H5HF__space_delete(H5HF_hdr_t *hdr);
+H5_DLL herr_t H5HF__space_sect_change_class(H5HF_hdr_t *hdr, 
     H5HF_free_section_t *sect, uint16_t new_class);
 
 /* Free space section routines */
 H5_DLL H5HF_free_section_t *H5HF_sect_single_new(hsize_t sect_off,
     size_t sect_size, H5HF_indirect_t *parent, unsigned par_entry);
-H5_DLL herr_t H5HF_sect_single_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect);
+H5_DLL herr_t H5HF__sect_single_revive(H5HF_hdr_t *hdr, H5HF_free_section_t *sect);
 H5_DLL herr_t H5HF_sect_single_dblock_info(H5HF_hdr_t *hdr,
-    H5HF_free_section_t *sect, haddr_t *dblock_addr, size_t *dblock_size);
-H5_DLL herr_t H5HF_sect_single_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect, size_t amt);
-H5_DLL herr_t H5HF_sect_row_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect);
-H5_DLL herr_t H5HF_sect_row_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect, unsigned *entry_p);
+    const H5HF_free_section_t *sect, haddr_t *dblock_addr, size_t *dblock_size);
+H5_DLL herr_t H5HF__sect_single_reduce(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
+    size_t amt);
+H5_DLL herr_t H5HF__sect_row_revive(H5HF_hdr_t *hdr, H5HF_free_section_t *sect);
+H5_DLL herr_t H5HF__sect_row_reduce(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
+    unsigned *entry_p);
 H5_DLL H5HF_indirect_t *H5HF_sect_row_get_iblock(H5HF_free_section_t *sect);
-H5_DLL herr_t H5HF_sect_indirect_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_indirect_t *iblock, unsigned start_entry, unsigned nentries);
-H5_DLL herr_t H5HF_sect_single_free(H5FS_section_info_t *sect);
+H5_DLL herr_t H5HF__sect_indirect_add(H5HF_hdr_t *hdr, H5HF_indirect_t *iblock,
+    unsigned start_entry, unsigned nentries);
+H5_DLL herr_t H5HF__sect_single_free(H5FS_section_info_t *sect);
 
 /* Internal operator callbacks */
 H5_DLL herr_t H5HF_op_read(const void *obj, size_t obj_len, void *op_data);
diff --git a/src/H5HFprivate.h b/src/H5HFprivate.h
index 441ad3e..5086afb 100644
--- a/src/H5HFprivate.h
+++ b/src/H5HFprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -108,36 +106,33 @@ typedef herr_t (*H5HF_operator_t)(const void *obj/*in*/, size_t obj_len,
 /***************************************/
 
 /* General routines for fractal heap operations */
-H5_DLL H5HF_t *H5HF_create(H5F_t *f, hid_t dxpl_id, const H5HF_create_t *cparam);
-H5_DLL H5HF_t *H5HF_open(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr);
+H5_DLL H5HF_t *H5HF_create(H5F_t *f, const H5HF_create_t *cparam);
+H5_DLL H5HF_t *H5HF_open(H5F_t *f, haddr_t fh_addr);
 H5_DLL herr_t H5HF_get_id_len(H5HF_t *fh, size_t *id_len_p/*out*/);
 H5_DLL herr_t H5HF_get_heap_addr(const H5HF_t *fh, haddr_t *heap_addr/*out*/);
-H5_DLL herr_t H5HF_insert(H5HF_t *fh, hid_t dxpl_id, size_t size,
-    const void *obj, void *id/*out*/);
-H5_DLL herr_t H5HF_get_obj_len(H5HF_t *fh, hid_t dxpl_id, const void *id,
-    size_t *obj_len_p/*out*/);
-H5_DLL herr_t H5HF_get_obj_off(H5HF_t *fh, hid_t dxpl_id, const void *_id,
-    hsize_t *obj_off_p/*out*/);
-H5_DLL herr_t H5HF_read(H5HF_t *fh, hid_t dxpl_id, const void *id,
-    void *obj/*out*/);
-H5_DLL herr_t H5HF_write(H5HF_t *fh, hid_t dxpl_id, void *id, hbool_t *id_changed,
+H5_DLL herr_t H5HF_insert(H5HF_t *fh, size_t size, const void *obj,
+    void *id/*out*/);
+H5_DLL herr_t H5HF_get_obj_len(H5HF_t *fh, const void *id, size_t *obj_len_p/*out*/);
+H5_DLL herr_t H5HF_get_obj_off(H5HF_t *fh, const void *_id, hsize_t *obj_off_p/*out*/);
+H5_DLL herr_t H5HF_read(H5HF_t *fh, const void *id, void *obj/*out*/);
+H5_DLL herr_t H5HF_write(H5HF_t *fh, void *id, hbool_t *id_changed,
     const void *obj);
-H5_DLL herr_t H5HF_op(H5HF_t *fh, hid_t dxpl_id, const void *id,
-    H5HF_operator_t op, void *op_data);
-H5_DLL herr_t H5HF_remove(H5HF_t *fh, hid_t dxpl_id, const void *id);
-H5_DLL herr_t H5HF_close(H5HF_t *fh, hid_t dxpl_id);
-H5_DLL herr_t H5HF_delete(H5F_t *f, hid_t dxpl_id, haddr_t fh_addr);
+H5_DLL herr_t H5HF_op(H5HF_t *fh, const void *id, H5HF_operator_t op,
+    void *op_data);
+H5_DLL herr_t H5HF_remove(H5HF_t *fh, const void *id);
+H5_DLL herr_t H5HF_close(H5HF_t *fh);
+H5_DLL herr_t H5HF_delete(H5F_t *f, haddr_t fh_addr);
 
 /* Statistics routines */
 H5_DLL herr_t H5HF_stat_info(const H5HF_t *fh, H5HF_stat_t *stats);
-H5_DLL herr_t H5HF_size(const H5HF_t *fh, hid_t dxpl_id, hsize_t *heap_size/*out*/);
+H5_DLL herr_t H5HF_size(const H5HF_t *fh, hsize_t *heap_size/*out*/);
 
 /* Debugging routines */
-H5_DLL herr_t H5HF_id_print(H5HF_t *fh, hid_t dxpl_id,
-    const void *id, FILE *stream, int indent, int fwidth);
+H5_DLL herr_t H5HF_id_print(H5HF_t *fh, const void *id, FILE *stream,
+    int indent, int fwidth);
 #ifdef H5HF_DEBUGGING
-H5_DLL herr_t H5HF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth);
+H5_DLL herr_t H5HF_sects_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth);
 #endif /* H5HF_DEBUGGING */
 
 #endif /* _H5HFprivate_H */
diff --git a/src/H5HFpublic.h b/src/H5HFpublic.h
index 78b367b..82cfc21 100644
--- a/src/H5HFpublic.h
+++ b/src/H5HFpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HFsection.c b/src/H5HFsection.c
index b113ca1..66c8414 100644
--- a/src/H5HFsection.c
+++ b/src/H5HFsection.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -79,58 +77,57 @@ static herr_t H5HF_sect_node_free(H5HF_free_section_t *sect,
     H5HF_indirect_t *parent);
 
 /* 'single' section routines */
-static herr_t H5HF_sect_single_locate_parent(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    hbool_t refresh, H5HF_free_section_t *sect);
-static herr_t H5HF_sect_single_full_dblock(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_single_locate_parent(H5HF_hdr_t *hdr, hbool_t refresh,
     H5HF_free_section_t *sect);
+static herr_t H5HF__sect_single_full_dblock(H5HF_hdr_t *hdr, H5HF_free_section_t *sect);
 
 /* 'single' section callbacks */
-static herr_t H5HF_sect_single_add(H5FS_section_info_t **sect, unsigned *flags,
+static herr_t H5HF__sect_single_add(H5FS_section_info_t **sect, unsigned *flags,
     void *udata);
-static H5FS_section_info_t *H5HF_sect_single_deserialize(const H5FS_section_class_t *cls,
-    hid_t dxpl_id, const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
+static H5FS_section_info_t *H5HF__sect_single_deserialize(const H5FS_section_class_t *cls,
+    const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
     unsigned *des_flags);
-static htri_t H5HF_sect_single_can_merge(const H5FS_section_info_t *sect1,
+static htri_t H5HF__sect_single_can_merge(const H5FS_section_info_t *sect1,
     const H5FS_section_info_t *sect2, void *udata);
-static herr_t H5HF_sect_single_merge(H5FS_section_info_t **sect1,
+static herr_t H5HF__sect_single_merge(H5FS_section_info_t **sect1,
     H5FS_section_info_t *sect2, void *udata);
-static htri_t H5HF_sect_single_can_shrink(const H5FS_section_info_t *sect,
+static htri_t H5HF__sect_single_can_shrink(const H5FS_section_info_t *sect,
     void *udata);
-static herr_t H5HF_sect_single_shrink(H5FS_section_info_t **_sect,
+static herr_t H5HF__sect_single_shrink(H5FS_section_info_t **_sect,
     void *udata);
-static herr_t H5HF_sect_single_valid(const H5FS_section_class_t *cls,
-    const H5FS_section_info_t *sect, hid_t dxpl_id);
+static herr_t H5HF__sect_single_valid(const H5FS_section_class_t *cls,
+    const H5FS_section_info_t *sect);
 
 /* 'row' section routines */
 static H5HF_free_section_t *H5HF_sect_row_create(haddr_t sect_off,
     hsize_t sect_size, hbool_t is_first, unsigned row, unsigned col,
     unsigned nentries, H5HF_free_section_t *under_sect);
-static herr_t H5HF_sect_row_first(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect);
+static herr_t H5HF__sect_row_first(H5HF_hdr_t *hdr, H5HF_free_section_t *sect);
+static herr_t H5HF__sect_row_parent_removed(H5HF_free_section_t *sect);
 static herr_t H5HF_sect_row_from_single(H5HF_hdr_t *hdr,
     H5HF_free_section_t *sect, H5HF_direct_t *dblock);
-static herr_t H5HF_sect_row_free_real(H5HF_free_section_t *sect);
+static herr_t H5HF__sect_row_free_real(H5HF_free_section_t *sect);
 
 /* 'row' section callbacks */
-static herr_t H5HF_sect_row_init_cls(H5FS_section_class_t *cls, void *udata);
-static herr_t H5HF_sect_row_term_cls(H5FS_section_class_t *cls);
-static herr_t H5HF_sect_row_serialize(const H5FS_section_class_t *cls,
+static herr_t H5HF__sect_row_init_cls(H5FS_section_class_t *cls, void *udata);
+static herr_t H5HF__sect_row_term_cls(H5FS_section_class_t *cls);
+static herr_t H5HF__sect_row_serialize(const H5FS_section_class_t *cls,
     const H5FS_section_info_t *sect, uint8_t *buf);
-static H5FS_section_info_t *H5HF_sect_row_deserialize(const H5FS_section_class_t *cls,
-    hid_t dxpl_id, const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
+static H5FS_section_info_t *H5HF__sect_row_deserialize(const H5FS_section_class_t *cls,
+    const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
     unsigned *des_flags);
-static htri_t H5HF_sect_row_can_merge(const H5FS_section_info_t *sect1,
+static htri_t H5HF__sect_row_can_merge(const H5FS_section_info_t *sect1,
     const H5FS_section_info_t *sect2, void *udata);
-static herr_t H5HF_sect_row_merge(H5FS_section_info_t **sect1,
+static herr_t H5HF__sect_row_merge(H5FS_section_info_t **sect1,
     H5FS_section_info_t *sect2, void *udata);
-static htri_t H5HF_sect_row_can_shrink(const H5FS_section_info_t *sect,
+static htri_t H5HF__sect_row_can_shrink(const H5FS_section_info_t *sect,
     void *udata);
-static herr_t H5HF_sect_row_shrink(H5FS_section_info_t **sect,
+static herr_t H5HF__sect_row_shrink(H5FS_section_info_t **sect,
     void *udata);
-static herr_t H5HF_sect_row_free(H5FS_section_info_t *sect);
-static herr_t H5HF_sect_row_valid(const H5FS_section_class_t *cls,
-    const H5FS_section_info_t *sect, hid_t dxpl_id);
-static herr_t H5HF_sect_row_debug(const H5FS_section_info_t *sect,
+static herr_t H5HF__sect_row_free(H5FS_section_info_t *sect);
+static herr_t H5HF__sect_row_valid(const H5FS_section_class_t *cls,
+    const H5FS_section_info_t *sect);
+static herr_t H5HF__sect_row_debug(const H5FS_section_info_t *sect,
     FILE *stream, int indent, int fwidth);
 
 /* 'indirect' section routines */
@@ -138,37 +135,36 @@ static H5HF_free_section_t *H5HF_sect_indirect_new(H5HF_hdr_t *hdr,
     haddr_t sect_off, hsize_t sect_size,
     H5HF_indirect_t *iblock, hsize_t iblock_off,
     unsigned row, unsigned col, unsigned nentries);
-static herr_t H5HF_sect_indirect_init_rows(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect, hbool_t first_child, H5HF_free_section_t **first_row_sect,
+static herr_t H5HF__sect_indirect_init_rows(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
+    hbool_t first_child, H5HF_free_section_t **first_row_sect,
     unsigned space_flags, unsigned start_row, unsigned start_col,
     unsigned end_row, unsigned end_col);
 static H5HF_free_section_t *H5HF_sect_indirect_for_row(H5HF_hdr_t *hdr,
     H5HF_indirect_t *iblock, H5HF_free_section_t *row_sect);
 static herr_t H5HF_sect_indirect_decr(H5HF_free_section_t *sect);
-static herr_t H5HF_sect_indirect_revive_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_indirect_revive_row(H5HF_hdr_t *hdr,
     H5HF_free_section_t *sect);
-static herr_t H5HF_sect_indirect_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_indirect_revive(H5HF_hdr_t *hdr,
     H5HF_free_section_t *sect, H5HF_indirect_t *sect_iblock);
-static herr_t H5HF_sect_indirect_reduce_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_indirect_reduce_row(H5HF_hdr_t *hdr,
     H5HF_free_section_t *row_sect, hbool_t *alloc_from_start);
-static herr_t H5HF_sect_indirect_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_indirect_reduce(H5HF_hdr_t *hdr,
     H5HF_free_section_t *sect, unsigned child_entry);
-static herr_t H5HF_sect_indirect_first(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_indirect_first(H5HF_hdr_t *hdr,
     H5HF_free_section_t *sect);
 static hbool_t H5HF_sect_indirect_is_first(H5HF_free_section_t *sect);
 static H5HF_indirect_t * H5HF_sect_indirect_get_iblock(H5HF_free_section_t *sect);
 static hsize_t H5HF_sect_indirect_iblock_off(const H5HF_free_section_t *sect);
 static H5HF_free_section_t * H5HF_sect_indirect_top(H5HF_free_section_t *sect);
-static herr_t H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_indirect_merge_row(H5HF_hdr_t *hdr, 
     H5HF_free_section_t *sect1, H5HF_free_section_t *sect2);
-static herr_t H5HF_sect_indirect_build_parent(H5HF_hdr_t *hdr, H5HF_free_section_t *sect);
-static herr_t H5HF_sect_indirect_shrink(H5HF_hdr_t *hdr, hid_t dxpl_id,
+static herr_t H5HF__sect_indirect_build_parent(H5HF_hdr_t *hdr, H5HF_free_section_t *sect);
+static herr_t H5HF__sect_indirect_shrink(H5HF_hdr_t *hdr,
     H5HF_free_section_t *sect);
 static herr_t H5HF_sect_indirect_serialize(H5HF_hdr_t *hdr,
     const H5HF_free_section_t *sect, uint8_t *buf);
-static H5FS_section_info_t *H5HF_sect_indirect_deserialize(H5HF_hdr_t *hdr,
-    hid_t dxpl_id, const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
-    unsigned *des_flags);
+static H5FS_section_info_t *H5HF__sect_indirect_deserialize(H5HF_hdr_t *hdr,
+    const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size, unsigned *des_flags);
 static herr_t H5HF_sect_indirect_free(H5HF_free_section_t *sect);
 static herr_t H5HF_sect_indirect_valid(const H5HF_hdr_t *hdr,
     const H5HF_free_section_t *sect);
@@ -197,15 +193,15 @@ H5FS_section_class_t H5HF_FSPACE_SECT_CLS_SINGLE[1] = {{
     NULL,				/* Terminate section class      */
 
     /* Object methods */
-    H5HF_sect_single_add,		/* Add section                  */
+    H5HF__sect_single_add,		/* Add section                  */
     NULL,				/* Serialize section            */
-    H5HF_sect_single_deserialize,	/* Deserialize section          */
-    H5HF_sect_single_can_merge,		/* Can sections merge?          */
-    H5HF_sect_single_merge,		/* Merge sections               */
-    H5HF_sect_single_can_shrink,	/* Can section shrink container?*/
-    H5HF_sect_single_shrink,		/* Shrink container w/section   */
-    H5HF_sect_single_free,		/* Free section                 */
-    H5HF_sect_single_valid,		/* Check validity of section    */
+    H5HF__sect_single_deserialize,	/* Deserialize section          */
+    H5HF__sect_single_can_merge,	/* Can sections merge?          */
+    H5HF__sect_single_merge,		/* Merge sections               */
+    H5HF__sect_single_can_shrink,	/* Can section shrink container?*/
+    H5HF__sect_single_shrink,		/* Shrink container w/section   */
+    H5HF__sect_single_free,		/* Free section                 */
+    H5HF__sect_single_valid,		/* Check validity of section    */
     NULL,				/* Split section node for alignment */
     NULL,				/* Dump debugging for section   */
 }};
@@ -222,21 +218,21 @@ H5FS_section_class_t H5HF_FSPACE_SECT_CLS_FIRST_ROW[1] = {{
     NULL,				/* Class private info           */
 
     /* Class methods */
-    H5HF_sect_row_init_cls,		/* Initialize section class     */
-    H5HF_sect_row_term_cls,		/* Terminate section class      */
+    H5HF__sect_row_init_cls,		/* Initialize section class     */
+    H5HF__sect_row_term_cls,		/* Terminate section class      */
 
     /* Object methods */
     NULL,				/* Add section                  */
-    H5HF_sect_row_serialize,		/* Serialize section            */
-    H5HF_sect_row_deserialize,		/* Deserialize section          */
-    H5HF_sect_row_can_merge,		/* Can sections merge?          */
-    H5HF_sect_row_merge,		/* Merge sections               */
-    H5HF_sect_row_can_shrink,		/* Can section shrink container?*/
-    H5HF_sect_row_shrink,		/* Shrink container w/section   */
-    H5HF_sect_row_free,			/* Free section                 */
-    H5HF_sect_row_valid,		/* Check validity of section    */
+    H5HF__sect_row_serialize,		/* Serialize section            */
+    H5HF__sect_row_deserialize,		/* Deserialize section          */
+    H5HF__sect_row_can_merge,		/* Can sections merge?          */
+    H5HF__sect_row_merge,		/* Merge sections               */
+    H5HF__sect_row_can_shrink,		/* Can section shrink container?*/
+    H5HF__sect_row_shrink,		/* Shrink container w/section   */
+    H5HF__sect_row_free,		/* Free section                 */
+    H5HF__sect_row_valid,		/* Check validity of section    */
     NULL,				/* Split section node for alignment */
-    H5HF_sect_row_debug,		/* Dump debugging for section   */
+    H5HF__sect_row_debug,		/* Dump debugging for section   */
 }};
 
 /* Class info for "normal row" free space sections */
@@ -248,8 +244,8 @@ H5FS_section_class_t H5HF_FSPACE_SECT_CLS_NORMAL_ROW[1] = {{
     NULL,				/* Class private info           */
 
     /* Class methods */
-    H5HF_sect_row_init_cls,		/* Initialize section class     */
-    H5HF_sect_row_term_cls,		/* Terminate section class      */
+    H5HF__sect_row_init_cls,		/* Initialize section class     */
+    H5HF__sect_row_term_cls,		/* Terminate section class      */
 
     /* Object methods */
     NULL,				/* Add section                  */
@@ -259,10 +255,10 @@ H5FS_section_class_t H5HF_FSPACE_SECT_CLS_NORMAL_ROW[1] = {{
     NULL,				/* Merge sections               */
     NULL,				/* Can section shrink container?*/
     NULL,				/* Shrink container w/section   */
-    H5HF_sect_row_free,			/* Free section                 */
-    H5HF_sect_row_valid,		/* Check validity of section    */
+    H5HF__sect_row_free,		/* Free section                 */
+    H5HF__sect_row_valid,		/* Check validity of section    */
     NULL,				/* Split section node for alignment */
-    H5HF_sect_row_debug,		/* Dump debugging for section   */
+    H5HF__sect_row_debug,		/* Dump debugging for section   */
 }};
 
 /* Class info for "indirect" free space sections */
@@ -461,7 +457,7 @@ H5HF_sect_node_free(H5HF_free_section_t *sect, H5HF_indirect_t *iblock)
 
     /* Release indirect block, if there was one */
     if(iblock)
-        if(H5HF_iblock_decr(iblock) < 0)
+        if(H5HF__iblock_decr(iblock) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on section's indirect block")
 
     /* Release the section */
@@ -525,7 +521,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_locate_parent
+ * Function:	H5HF__sect_single_locate_parent
  *
  * Purpose:	Locate the parent indirect block for a single section
  *
@@ -538,7 +534,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_single_locate_parent(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t refresh,
+H5HF__sect_single_locate_parent(H5HF_hdr_t *hdr, hbool_t refresh,
     H5HF_free_section_t *sect)
 {
     H5HF_indirect_t *sec_iblock;        /* Pointer to section indirect block */
@@ -546,7 +542,7 @@ H5HF_sect_single_locate_parent(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t refresh,
     hbool_t did_protect;                /* Whether we protected the indirect block or not */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -556,7 +552,7 @@ H5HF_sect_single_locate_parent(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t refresh,
     HDassert(sect);
 
     /* Look up indirect block containing direct blocks for range */
-    if(H5HF_man_dblock_locate(hdr, dxpl_id, sect->sect_info.addr, &sec_iblock, &sec_entry, &did_protect, H5AC__READ_ONLY_FLAG) < 0)
+    if(H5HF__man_dblock_locate(hdr, sect->sect_info.addr, &sec_iblock, &sec_entry, &did_protect, H5AC__READ_ONLY_FLAG) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of section")
 
     /* Increment reference count on indirect block that free section is in */
@@ -567,7 +563,7 @@ H5HF_sect_single_locate_parent(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t refresh,
     if(refresh) {
         if(sect->u.single.parent) {
             /* Release hold on previous parent indirect block */
-            if(H5HF_iblock_decr(sect->u.single.parent) < 0)
+            if(H5HF__iblock_decr(sect->u.single.parent) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on section's indirect block")
         } /* end if */
     } /* end if */
@@ -577,17 +573,17 @@ H5HF_sect_single_locate_parent(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t refresh,
     sect->u.single.par_entry = sec_entry;
 
     /* Unlock indirect block */
-    if(H5HF_man_iblock_unprotect(sec_iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+    if(H5HF__man_iblock_unprotect(sec_iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
     sec_iblock = NULL;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_single_locate_parent() */
+} /* end H5HF__sect_single_locate_parent() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5HF_sect_single_revive
+ * Function:    H5HF__sect_single_revive
  *
  * Purpose:     Update the memory information for a 'single' free section
  *
@@ -600,12 +596,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sect_single_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect)
+H5HF__sect_single_revive(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -623,7 +618,7 @@ H5HF_sect_single_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
     } /* end if */
     else {
         /* Look up indirect block information for section */
-        if(H5HF_sect_single_locate_parent(hdr, dxpl_id, FALSE, sect) < 0)
+        if(H5HF__sect_single_locate_parent(hdr, FALSE, sect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't get section's parent info")
     } /* end else */
 
@@ -632,7 +627,7 @@ H5HF_sect_single_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_single_revive() */
+} /* end H5HF__sect_single_revive() */
 
 
 /*-------------------------------------------------------------------------
@@ -649,8 +644,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sect_single_dblock_info(H5HF_hdr_t *hdr,
-    H5HF_free_section_t *sect, haddr_t *dblock_addr, size_t *dblock_size)
+H5HF_sect_single_dblock_info(H5HF_hdr_t *hdr, const H5HF_free_section_t *sect,
+    haddr_t *dblock_addr, size_t *dblock_size)
 {
     FUNC_ENTER_NOAPI_NOERR
 
@@ -682,7 +677,7 @@ H5HF_sect_single_dblock_info(H5HF_hdr_t *hdr,
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_reduce
+ * Function:	H5HF__sect_single_reduce
  *
  * Purpose:	Reduce the size of a single section (possibly freeing it)
  *              and re-add it back to the free space manager for the heap
@@ -697,12 +692,12 @@ H5HF_sect_single_dblock_info(H5HF_hdr_t *hdr,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sect_single_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect, size_t amt)
+H5HF__sect_single_reduce(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
+    size_t amt)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -715,7 +710,7 @@ H5HF_sect_single_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
     /* Check for eliminating the section */
     if(sect->sect_info.size == amt) {
         /* Free single section */
-        if(H5HF_sect_single_free((H5FS_section_info_t *)sect) < 0)
+        if(H5HF__sect_single_free((H5FS_section_info_t *)sect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free single section node")
     } /* end if */
     else {
@@ -724,17 +719,17 @@ H5HF_sect_single_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id,
         sect->sect_info.size -= amt;
 
         /* Re-insert section node into heap's free space */
-        if(H5HF_space_add(hdr, dxpl_id, sect, 0) < 0)
+        if(H5HF__space_add(hdr, sect, 0) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't re-add single section to free space manager")
     } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_single_reduce() */
+} /* end H5HF__sect_single_reduce() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_full_dblock
+ * Function:	H5HF__sect_single_full_dblock
  *
  * Purpose:	Checks if a single section covers the entire direct block
  *              that it resides in, and converts it to a row section if so
@@ -751,15 +746,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_single_full_dblock(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect)
+H5HF__sect_single_full_dblock(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     haddr_t dblock_addr;                /* Section's direct block's address */
     size_t dblock_size;                 /* Section's direct block's size */
     size_t dblock_overhead;             /* Direct block's overhead */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments. */
     HDassert(sect);
@@ -776,8 +770,9 @@ H5HF_sect_single_full_dblock(H5HF_hdr_t *hdr, hid_t dxpl_id,
     if((dblock_size - dblock_overhead) == sect->sect_info.size &&
             hdr->man_dtable.curr_root_rows > 0) {
         H5HF_direct_t *dblock;          /* Pointer to direct block for section */
+        hbool_t parent_removed;         /* Whether the direct block parent was removed from the file */
 
-        if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, dblock_addr, dblock_size, sect->u.single.parent, sect->u.single.par_entry, H5AC__NO_FLAGS_SET)))
+        if(NULL == (dblock = H5HF__man_dblock_protect(hdr, dblock_addr, dblock_size, sect->u.single.parent, sect->u.single.par_entry, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to load fractal heap direct block")
         HDassert(H5F_addr_eq(dblock->block_off + dblock_overhead, sect->sect_info.addr));
 
@@ -786,18 +781,25 @@ H5HF_sect_single_full_dblock(H5HF_hdr_t *hdr, hid_t dxpl_id,
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCONVERT, FAIL, "can't convert single section into row section")
 
         /* Destroy direct block */
-        if(H5HF_man_dblock_destroy(hdr, dxpl_id, dblock, dblock_addr) < 0)
+        if(H5HF__man_dblock_destroy(hdr, dblock, dblock_addr, &parent_removed) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release direct block")
         dblock = NULL;
+
+        /* If the parent for this direct block was removed and the indirect
+         *      section is still "live", switch it to the "serialized" state.
+         */
+        if(parent_removed && H5FS_SECT_LIVE == sect->u.row.under->sect_info.state)
+            if(H5HF__sect_row_parent_removed(sect) < 0)
+                HGOTO_ERROR(H5E_HEAP, H5E_CANTUPDATE, FAIL, "can't update section info")
     } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_single_full_dblock() */
+} /* H5HF__sect_single_full_dblock() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_add
+ * Function:	H5HF__sect_single_add
  *
  * Purpose:	Perform any actions on section as it is added to free space
  *              manager
@@ -811,11 +813,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_single_add(H5FS_section_info_t **_sect, unsigned *flags, void *_udata)
+H5HF__sect_single_add(H5FS_section_info_t **_sect, unsigned *flags, void *_udata)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Don't need to check section if we are deserializing, because it should
      *  have already been checked when it was first added
@@ -824,7 +826,6 @@ H5HF_sect_single_add(H5FS_section_info_t **_sect, unsigned *flags, void *_udata)
         H5HF_free_section_t **sect = (H5HF_free_section_t **)_sect;   /* Fractal heap free section */
         H5HF_sect_add_ud_t *udata = (H5HF_sect_add_ud_t *)_udata;   /* User callback data */
         H5HF_hdr_t *hdr = udata->hdr;       /* Fractal heap header */
-        hid_t dxpl_id = udata->dxpl_id;     /* DXPL ID for operation */
 
         /* Sanity check */
         HDassert(sect);
@@ -832,7 +833,7 @@ H5HF_sect_single_add(H5FS_section_info_t **_sect, unsigned *flags, void *_udata)
 
         /* Check if single section covers entire direct block it's in */
         /* (converts to row section possibly) */
-        if(H5HF_sect_single_full_dblock(hdr, dxpl_id, (*sect)) < 0)
+        if(H5HF__sect_single_full_dblock(hdr, (*sect)) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCONVERT, FAIL, "can't check/convert single section")
 
         /* Set the "returned space" flag if the single section was changed
@@ -845,11 +846,11 @@ H5HF_sect_single_add(H5FS_section_info_t **_sect, unsigned *flags, void *_udata)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_single_add() */
+} /* H5HF__sect_single_add() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_deserialize
+ * Function:	H5HF__sect_single_deserialize
  *
  * Purpose:	Deserialize a buffer into a "live" single section
  *
@@ -862,14 +863,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5FS_section_info_t *
-H5HF_sect_single_deserialize(const H5FS_section_class_t H5_ATTR_UNUSED *cls,
-    hid_t H5_ATTR_UNUSED dxpl_id, const uint8_t H5_ATTR_UNUSED *buf, haddr_t sect_addr,
+H5HF__sect_single_deserialize(const H5FS_section_class_t H5_ATTR_UNUSED *cls,
+    const uint8_t H5_ATTR_UNUSED *buf, haddr_t sect_addr,
     hsize_t sect_size, unsigned H5_ATTR_UNUSED *des_flags)
 {
     H5HF_free_section_t *new_sect;      /* New section */
     H5FS_section_info_t *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(H5F_addr_defined(sect_addr));
@@ -884,11 +885,11 @@ H5HF_sect_single_deserialize(const H5FS_section_class_t H5_ATTR_UNUSED *cls,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_single_deserialize() */
+} /* H5HF__sect_single_deserialize() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_can_merge
+ * Function:	H5HF__sect_single_can_merge
  *
  * Purpose:	Can two sections of this type merge?
  *
@@ -904,14 +905,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5HF_sect_single_can_merge(const H5FS_section_info_t *_sect1,
+H5HF__sect_single_can_merge(const H5FS_section_info_t *_sect1,
     const H5FS_section_info_t *_sect2, void H5_ATTR_UNUSED *_udata)
 {
     const H5HF_free_section_t *sect1 = (const H5HF_free_section_t *)_sect1;   /* Fractal heap free section */
     const H5HF_free_section_t *sect2 = (const H5HF_free_section_t *)_sect2;   /* Fractal heap free section */
     htri_t ret_value = FALSE;           /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Check arguments. */
     HDassert(sect1);
@@ -929,11 +930,11 @@ H5HF_sect_single_can_merge(const H5FS_section_info_t *_sect1,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_single_can_merge() */
+} /* H5HF__sect_single_can_merge() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_merge
+ * Function:	H5HF__sect_single_merge
  *
  * Purpose:	Merge two sections of this type
  *
@@ -949,17 +950,16 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_single_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2,
+H5HF__sect_single_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2,
     void *_udata)
 {
     H5HF_free_section_t **sect1 = (H5HF_free_section_t **)_sect1;   /* Fractal heap free section */
     H5HF_free_section_t *sect2 = (H5HF_free_section_t *)_sect2;   /* Fractal heap free section */
     H5HF_sect_add_ud_t *udata = (H5HF_sect_add_ud_t *)_udata;   /* User callback data */
     H5HF_hdr_t *hdr = udata->hdr;       /* Fractal heap header */
-    hid_t dxpl_id = udata->dxpl_id;     /* DXPL ID for operation */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(sect1);
@@ -972,26 +972,26 @@ H5HF_sect_single_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2
     (*sect1)->sect_info.size += sect2->sect_info.size;
 
     /* Get rid of second section */
-    if(H5HF_sect_single_free((H5FS_section_info_t *)sect2) < 0)
+    if(H5HF__sect_single_free((H5FS_section_info_t *)sect2) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free section node")
 
     /* Check to see if we should revive first section */
     if((*sect1)->sect_info.state != H5FS_SECT_LIVE)
-        if(H5HF_sect_single_revive(hdr, dxpl_id, (*sect1)) < 0)
+        if(H5HF__sect_single_revive(hdr, (*sect1)) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't revive single free section")
 
     /* Check if single section covers entire direct block it's in */
     /* (converts to row section possibly) */
-    if(H5HF_sect_single_full_dblock(hdr, dxpl_id, (*sect1)) < 0)
+    if(H5HF__sect_single_full_dblock(hdr, (*sect1)) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTCONVERT, FAIL, "can't check/convert single section")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_single_merge() */
+} /* H5HF__sect_single_merge() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_can_shrink
+ * Function:	H5HF__sect_single_can_shrink
  *
  * Purpose:	Can this section shrink the container?
  *
@@ -1009,14 +1009,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5HF_sect_single_can_shrink(const H5FS_section_info_t *_sect, void *_udata)
+H5HF__sect_single_can_shrink(const H5FS_section_info_t *_sect, void *_udata)
 {
     const H5HF_free_section_t *sect = (const H5HF_free_section_t *)_sect;   /* Fractal heap free section */
     H5HF_sect_add_ud_t *udata = (H5HF_sect_add_ud_t *)_udata;   /* User callback data */
     H5HF_hdr_t *hdr = udata->hdr;       /* Fractal heap header */
     htri_t ret_value = FALSE;           /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Check arguments. */
     HDassert(sect);
@@ -1046,11 +1046,11 @@ H5HF_sect_single_can_shrink(const H5FS_section_info_t *_sect, void *_udata)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_single_can_shrink() */
+} /* H5HF__sect_single_can_shrink() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_shrink
+ * Function:	H5HF__sect_single_shrink
  *
  * Purpose:	Shrink container with section
  *
@@ -1064,18 +1064,17 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_single_shrink(H5FS_section_info_t **_sect, void H5_ATTR_UNUSED *_udata)
+H5HF__sect_single_shrink(H5FS_section_info_t **_sect, void *_udata)
 {
     H5HF_free_section_t **sect = (H5HF_free_section_t **)_sect;   /* Fractal heap free section */
     H5HF_sect_add_ud_t *udata = (H5HF_sect_add_ud_t *)_udata;   /* User callback data */
     H5HF_hdr_t *hdr = udata->hdr;       /* Fractal heap header */
-    hid_t dxpl_id = udata->dxpl_id;     /* DXPL ID for operation */
     H5HF_direct_t *dblock;              /* Pointer to direct block for section */
     haddr_t dblock_addr;                /* Section's direct block's address */
     size_t dblock_size;                 /* Section's direct block's size */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(sect);
@@ -1084,7 +1083,7 @@ H5HF_sect_single_shrink(H5FS_section_info_t **_sect, void H5_ATTR_UNUSED *_udata
 
     /* Check to see if we should revive section */
     if((*sect)->sect_info.state != H5FS_SECT_LIVE)
-        if(H5HF_sect_single_revive(hdr, dxpl_id, (*sect)) < 0)
+        if(H5HF__sect_single_revive(hdr, (*sect)) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't revive single free section")
 
     /* Retrieve direct block address from section */
@@ -1094,30 +1093,29 @@ H5HF_sect_single_shrink(H5FS_section_info_t **_sect, void H5_ATTR_UNUSED *_udata
     /* Protect the direct block for the section */
     /* (should be a root direct block) */
     HDassert(dblock_addr == hdr->man_dtable.table_addr);
-    if(NULL == (dblock = H5HF_man_dblock_protect(hdr, dxpl_id, dblock_addr,
-            dblock_size, (*sect)->u.single.parent, (*sect)->u.single.par_entry, H5AC__NO_FLAGS_SET)))
+    if(NULL == (dblock = H5HF__man_dblock_protect(hdr, dblock_addr, dblock_size, (*sect)->u.single.parent, (*sect)->u.single.par_entry, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to load fractal heap direct block")
     HDassert(H5F_addr_eq(dblock->block_off + dblock_size, (*sect)->sect_info.addr + (*sect)->sect_info.size));
 
+    /* Get rid of section */
+    if(H5HF__sect_single_free((H5FS_section_info_t *)*sect) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free section node")
+
     /* Destroy direct block */
-    if(H5HF_man_dblock_destroy(hdr, dxpl_id, dblock, dblock_addr) < 0)
+    if(H5HF__man_dblock_destroy(hdr, dblock, dblock_addr, NULL) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release direct block")
     dblock = NULL;
 
-    /* Get rid of section */
-    if(H5HF_sect_single_free((H5FS_section_info_t *)*sect) < 0)
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free section node")
-
     /* Indicate that the section has been released */
     *sect = NULL;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_single_shrink() */
+} /* H5HF__sect_single_shrink() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_free
+ * Function:	H5HF__sect_single_free
  *
  * Purpose:	Free a 'single' section node
  *
@@ -1131,13 +1129,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sect_single_free(H5FS_section_info_t *_sect)
+H5HF__sect_single_free(H5FS_section_info_t *_sect)
 {
     H5HF_free_section_t *sect = (H5HF_free_section_t *)_sect;   /* Pointer to section to free */
     H5HF_indirect_t *parent = NULL;     /* Parent indirect block for section */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments. */
     HDassert(sect);
@@ -1155,11 +1153,11 @@ H5HF_sect_single_free(H5FS_section_info_t *_sect)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}   /* H5HF_sect_single_free() */
+}   /* H5HF__sect_single_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_single_valid
+ * Function:	H5HF__sect_single_valid
  *
  * Purpose:	Check the validity of a section
  *
@@ -1172,11 +1170,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_single_valid(const H5FS_section_class_t H5_ATTR_UNUSED *cls, const H5FS_section_info_t *_sect, hid_t dxpl_id)
+H5HF__sect_single_valid(const H5FS_section_class_t H5_ATTR_UNUSED *cls, const H5FS_section_info_t *_sect)
 {
     const H5HF_free_section_t *sect = (const H5HF_free_section_t *)_sect;   /* Pointer to section to check */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Check arguments. */
     HDassert(sect);
@@ -1197,8 +1195,7 @@ H5HF_sect_single_valid(const H5FS_section_class_t H5_ATTR_UNUSED *cls, const H5F
             HDassert(H5F_addr_defined(iblock->ents[sect->u.single.par_entry].addr));
 
             /* Retrieve direct block address from section */
-            /* (Casting away const OK - QAK) */
-            status = H5HF_sect_single_dblock_info(iblock->hdr, (H5HF_free_section_t *)sect, &dblock_addr, &dblock_size);
+            status = H5HF_sect_single_dblock_info(iblock->hdr, (const H5HF_free_section_t *)sect, &dblock_addr, &dblock_size);
             HDassert(status >= 0);
             HDassert(H5F_addr_eq(iblock->ents[sect->u.single.par_entry].addr, dblock_addr));
             HDassert(dblock_size > 0);
@@ -1222,25 +1219,24 @@ H5HF_sect_single_valid(const H5FS_section_class_t H5_ATTR_UNUSED *cls, const H5F
                 H5HF_direct_t *dblock;      /* Direct block for section */
 
                 /* Protect the direct block for the section */
-                dblock = H5HF_man_dblock_protect(iblock->hdr, dxpl_id, dblock_addr, dblock_size, iblock, sect->u.single.par_entry, H5AC__READ_ONLY_FLAG);
+                dblock = H5HF__man_dblock_protect(iblock->hdr, dblock_addr, dblock_size, iblock, sect->u.single.par_entry, H5AC__READ_ONLY_FLAG);
                 HDassert(dblock);
 
                 /* Sanity check settings for section */
                 HDassert(dblock_size == dblock->size);
                 HDassert(dblock->size > sect->sect_info.size);
                 HDassert(H5F_addr_lt(dblock->block_off, sect->sect_info.addr));
-                HDassert(H5F_addr_ge((dblock->block_off + dblock->size),
-                        (sect->sect_info.addr + sect->sect_info.size)));
+                HDassert(H5F_addr_ge((dblock->block_off + dblock->size), (sect->sect_info.addr + sect->sect_info.size)));
 
                 /* Release direct block */
-                status = H5AC_unprotect(iblock->hdr->f, dxpl_id, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET);
+                status = H5AC_unprotect(iblock->hdr->f, H5AC_FHEAP_DBLOCK, dblock_addr, dblock, H5AC__NO_FLAGS_SET);
                 HDassert(status >= 0);
             } /* end if */
         } /* end if */
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-}   /* H5HF_sect_single_valid() */
+}   /* H5HF__sect_single_valid() */
 
 
 /*-------------------------------------------------------------------------
@@ -1332,7 +1328,7 @@ H5HF_sect_row_from_single(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
         HGOTO_ERROR(H5E_HEAP, H5E_CANTCREATE, FAIL, "serializing row section not supported yet")
 
     /* Release single section's hold on underlying indirect block */
-    if(H5HF_iblock_decr(dblock->parent) < 0)
+    if(H5HF__iblock_decr(dblock->parent) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
 
 done:
@@ -1341,7 +1337,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_revive
+ * Function:	H5HF__sect_row_revive
  *
  * Purpose:	Update the memory information for a 'row' free section
  *
@@ -1354,11 +1350,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sect_row_revive(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect)
+H5HF__sect_row_revive(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1366,20 +1362,28 @@ H5HF_sect_row_revive(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect)
     HDassert(hdr);
     HDassert(sect);
     HDassert(sect->u.row.under);
-    HDassert(sect->sect_info.state == H5FS_SECT_SERIALIZED);
+
+    /* If the indirect section's iblock has been removed from the cache, but the
+     * section is still marked as "live", switch it to the "serialized" state.
+     */
+    if((H5FS_SECT_LIVE == sect->u.row.under->sect_info.state)
+            && (TRUE == sect->u.row.under->u.indirect.u.iblock->removed_from_cache))
+        if(H5HF__sect_row_parent_removed(sect) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTUPDATE, FAIL, "can't update section info")
 
     /* Pass along "revive" request to underlying indirect section */
     /* (which will mark this section as "live") */
-    if(H5HF_sect_indirect_revive_row(hdr, dxpl_id, sect->u.row.under) < 0)
+    if(H5HF__sect_indirect_revive_row(hdr, sect->u.row.under) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTREVIVE, FAIL, "can't revive indirect section")
+    HDassert(sect->sect_info.state == H5FS_SECT_LIVE);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_row_revive() */
+} /* end H5HF__sect_row_revive() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_reduce
+ * Function:	H5HF__sect_row_reduce
  *
  * Purpose:	Reduce the size of a row section (possibly freeing it)
  *              and re-add it back to the free space manager for the heap
@@ -1394,13 +1398,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sect_row_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect,
+H5HF__sect_row_reduce(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
     unsigned *entry_p)
 {
     hbool_t alloc_from_start;           /* Whether to allocate from the end of the row */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -1418,7 +1422,7 @@ H5HF_sect_row_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect,
 
     /* Forward row section to indirect routines, to handle reducing underlying indirect section */
     alloc_from_start = FALSE;
-    if(H5HF_sect_indirect_reduce_row(hdr, dxpl_id, sect, &alloc_from_start) < 0)
+    if(H5HF__sect_indirect_reduce_row(hdr, sect, &alloc_from_start) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't reduce underlying section")
 
     /* Determine entry allocated */
@@ -1429,7 +1433,7 @@ H5HF_sect_row_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect,
     /* Check for eliminating the section */
     if(sect->u.row.num_entries == 1) {
         /* Free row section */
-        if(H5HF_sect_row_free((H5FS_section_info_t *)sect) < 0)
+        if(H5HF__sect_row_free((H5FS_section_info_t *)sect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free row section node")
     } /* end if */
     else {
@@ -1447,17 +1451,17 @@ H5HF_sect_row_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect,
         sect->u.row.checked_out = FALSE;
 
         /* Add 'row' section back to free space list */
-        if(H5HF_space_add(hdr, dxpl_id, sect, 0) < 0)
+        if(H5HF__space_add(hdr, sect, 0) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't re-add indirect section to free space manager")
     } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_row_reduce() */
+} /* end H5HF__sect_row_reduce() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_first
+ * Function:	H5HF__sect_row_first
  *
  * Purpose:	Make row a "first row"
  *
@@ -1470,11 +1474,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_first(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect)
+H5HF__sect_row_first(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(hdr);
@@ -1487,15 +1491,14 @@ H5HF_sect_row_first(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect)
      */
     if(sect->u.row.checked_out)
         sect->sect_info.type = H5HF_FSPACE_SECT_FIRST_ROW;
-    else {
+    else
         /* Change row section to be the "first row" */
-        if(H5HF_space_sect_change_class(hdr, dxpl_id, sect, H5HF_FSPACE_SECT_FIRST_ROW) < 0)
+        if(H5HF__space_sect_change_class(hdr, sect, H5HF_FSPACE_SECT_FIRST_ROW) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSET, FAIL, "can't set row section to be first row")
-    } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_row_first() */
+} /* end H5HF__sect_row_first() */
 
 
 /*-------------------------------------------------------------------------
@@ -1533,7 +1536,60 @@ H5HF_sect_row_get_iblock(H5HF_free_section_t *sect)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_init_cls
+ * Function:	H5HF__sect_row_parent_removed
+ *
+ * Purpose:	Update the information for a row and its parent indirect
+ *              when an indirect block is removed from the metadata cache.
+ *
+ * Return:	Non-negative on success / Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@lbl.gov
+ *		February 4 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5HF__sect_row_parent_removed(H5HF_free_section_t *sect)
+{
+    hsize_t tmp_iblock_off;             /* Indirect block offset for row */
+    unsigned u;                         /* Local index value */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check arguments */
+    HDassert(sect);
+
+    /* Get a copy of the indirect block's offset before decrementing refcount on it */
+    tmp_iblock_off = sect->u.row.under->u.indirect.u.iblock->block_off;
+
+    /* Decrement the refcount on the indirect block, since serialized sections don't hold a reference */
+    if(H5HF__iblock_decr(sect->u.row.under->u.indirect.u.iblock) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
+
+    /* Switch indirect block info to serialized form */
+    /* (Overwrites iblock pointer in the indirect section) */
+    sect->u.row.under->u.indirect.u.iblock_off = tmp_iblock_off;
+    sect->u.row.under->u.indirect.iblock_entries = 0;
+
+    /* Loop over derived row sections and mark them all as 'live' now */
+    for(u = 0; u < sect->u.row.under->u.indirect.dir_nrows; u++)
+        sect->u.row.under->u.indirect.dir_rows[u]->sect_info.state = H5FS_SECT_SERIALIZED;
+
+    /* Mark the indirect section as serialized now */
+    sect->u.row.under->sect_info.state = H5FS_SECT_SERIALIZED;
+
+    /* Mark the row section as serialized now */
+    sect->sect_info.state = H5FS_SECT_SERIALIZED;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF__sect_row_parent_removed() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5HF__sect_row_init_cls
  *
  * Purpose:	Initialize the "row" section class structure
  *
@@ -1550,12 +1606,12 @@ H5HF_sect_row_get_iblock(H5HF_free_section_t *sect)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_init_cls(H5FS_section_class_t *cls, void *_udata)
+H5HF__sect_row_init_cls(H5FS_section_class_t *cls, void *_udata)
 {
     H5HF_hdr_t *hdr = (H5HF_hdr_t *)_udata; /* Fractal heap header */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(cls);
@@ -1573,11 +1629,11 @@ H5HF_sect_row_init_cls(H5FS_section_class_t *cls, void *_udata)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_init_cls() */
+} /* H5HF__sect_row_init_cls() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_term_cls
+ * Function:	H5HF__sect_row_term_cls
  *
  * Purpose:	Terminate the "row" section class structure
  *
@@ -1594,11 +1650,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_term_cls(H5FS_section_class_t *cls)
+H5HF__sect_row_term_cls(H5FS_section_class_t *cls)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(cls);
@@ -1609,11 +1665,11 @@ H5HF_sect_row_term_cls(H5FS_section_class_t *cls)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_term_cls() */
+} /* H5HF__sect_row_term_cls() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_serialize
+ * Function:	H5HF__sect_row_serialize
  *
  * Purpose:	Serialize a "live" row section into a buffer
  *
@@ -1627,14 +1683,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_serialize(const H5FS_section_class_t *cls,
+H5HF__sect_row_serialize(const H5FS_section_class_t *cls,
     const H5FS_section_info_t *_sect, uint8_t *buf)
 {
     H5HF_hdr_t *hdr;                    /* Fractal heap header */
     const H5HF_free_section_t *sect = (const H5HF_free_section_t *)_sect;
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(cls);
@@ -1650,11 +1706,11 @@ H5HF_sect_row_serialize(const H5FS_section_class_t *cls,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_serialize() */
+} /* H5HF__sect_row_serialize() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_deserialize
+ * Function:	H5HF__sect_row_deserialize
  *
  * Purpose:	Deserialize a buffer into a "live" row section
  *
@@ -1671,14 +1727,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5FS_section_info_t *
-H5HF_sect_row_deserialize(const H5FS_section_class_t *cls, hid_t dxpl_id,
-    const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
-    unsigned *des_flags)
+H5HF__sect_row_deserialize(const H5FS_section_class_t *cls, const uint8_t *buf,
+    haddr_t sect_addr, hsize_t sect_size, unsigned *des_flags)
 {
     H5HF_hdr_t *hdr;                    /* Fractal heap header */
     H5FS_section_info_t *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(cls);
@@ -1688,17 +1743,16 @@ H5HF_sect_row_deserialize(const H5FS_section_class_t *cls, hid_t dxpl_id,
 
     /* Forward to indirect routine to deserialize underlying section */
     hdr = ((H5HF_sect_private_t *)(cls->cls_private))->hdr;
-    if(NULL ==  (ret_value = H5HF_sect_indirect_deserialize(hdr, dxpl_id, buf,
-            sect_addr, sect_size, des_flags)))
+    if(NULL ==  (ret_value = H5HF__sect_indirect_deserialize(hdr, buf, sect_addr, sect_size, des_flags)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTDECODE, NULL, "can't deserialize row section's underlying indirect section")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_deserialize() */
+} /* H5HF__sect_row_deserialize() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_can_merge
+ * Function:	H5HF__sect_row_can_merge
  *
  * Purpose:	Can two sections of this type merge?
  *
@@ -1714,7 +1768,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5HF_sect_row_can_merge(const H5FS_section_info_t *_sect1,
+H5HF__sect_row_can_merge(const H5FS_section_info_t *_sect1,
     const H5FS_section_info_t *_sect2, void H5_ATTR_UNUSED *_udata)
 {
     const H5HF_free_section_t *sect1 = (const H5HF_free_section_t *)_sect1;   /* Fractal heap free section */
@@ -1722,7 +1776,7 @@ H5HF_sect_row_can_merge(const H5FS_section_info_t *_sect1,
     H5HF_free_section_t *top_indir_sect1, *top_indir_sect2; /* Top indirect section for each row */
     htri_t ret_value = FALSE;           /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Check arguments. */
     HDassert(sect1);
@@ -1742,7 +1796,7 @@ H5HF_sect_row_can_merge(const H5FS_section_info_t *_sect1,
      *  section.
      */
     if(top_indir_sect1 != top_indir_sect2) {
-        if(H5HF_sect_indirect_iblock_off(top_indir_sect1) == H5HF_sect_indirect_iblock_off(top_indir_sect2)) {
+        if(H5HF_sect_indirect_iblock_off(sect1->u.row.under) == H5HF_sect_indirect_iblock_off(sect2->u.row.under)) {
             /* Check if second section adjoins first section */
             if(H5F_addr_eq((top_indir_sect1->sect_info.addr + top_indir_sect1->u.indirect.span_size), top_indir_sect2->sect_info.addr))
                 HGOTO_DONE(TRUE)
@@ -1751,11 +1805,11 @@ H5HF_sect_row_can_merge(const H5FS_section_info_t *_sect1,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_can_merge() */
+} /* H5HF__sect_row_can_merge() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_merge
+ * Function:	H5HF__sect_row_merge
  *
  * Purpose:	Merge two sections of this type
  *
@@ -1771,17 +1825,16 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2,
+H5HF__sect_row_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2,
     void *_udata)
 {
     H5HF_free_section_t **sect1 = (H5HF_free_section_t **)_sect1;   /* Fractal heap free section */
     H5HF_free_section_t *sect2 = (H5HF_free_section_t *)_sect2;   /* Fractal heap free section */
     H5HF_sect_add_ud_t *udata = (H5HF_sect_add_ud_t *)_udata;   /* User callback data */
     H5HF_hdr_t *hdr = udata->hdr;       /* Fractal heap header */
-    hid_t dxpl_id = udata->dxpl_id;     /* DXPL ID for operation */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(sect1);
@@ -1797,32 +1850,21 @@ H5HF_sect_row_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2,
         top_indir_sect = H5HF_sect_indirect_top(sect2->u.row.under);
 
         /* Shrink away underlying indirect section */
-        if(H5HF_sect_indirect_shrink(hdr, dxpl_id, top_indir_sect) < 0)
+        if(H5HF__sect_indirect_shrink(hdr, top_indir_sect) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't shrink underlying indirect section")
     } /* end if */
-    else {
-        /* Check to see if we should revive first section */
-        if((*sect1)->sect_info.state != H5FS_SECT_LIVE)
-            if(H5HF_sect_row_revive(hdr, dxpl_id, (*sect1)) < 0)
-                HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't revive single free section")
-
-        /* Check to see if we should revive second section */
-        if(sect2->sect_info.state != H5FS_SECT_LIVE)
-            if(H5HF_sect_row_revive(hdr, dxpl_id, sect2) < 0)
-                HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't revive single free section")
-
+    else
         /* Merge rows' underlying indirect sections together */
-        if(H5HF_sect_indirect_merge_row(hdr, dxpl_id, (*sect1), sect2) < 0)
+        if(H5HF__sect_indirect_merge_row(hdr, (*sect1), sect2) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTMERGE, FAIL, "can't merge underlying indirect sections")
-    } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_merge() */
+} /* H5HF__sect_row_merge() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_can_shrink
+ * Function:	H5HF__sect_row_can_shrink
  *
  * Purpose:	Can this section shrink the container?
  *
@@ -1840,14 +1882,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5HF_sect_row_can_shrink(const H5FS_section_info_t *_sect, void H5_ATTR_UNUSED *_udata)
+H5HF__sect_row_can_shrink(const H5FS_section_info_t *_sect, void H5_ATTR_UNUSED *_udata)
 {
     const H5HF_free_section_t *sect = (const H5HF_free_section_t *)_sect;   /* Fractal heap free section */
     H5HF_sect_add_ud_t *udata = (H5HF_sect_add_ud_t *)_udata;   /* User callback data */
     H5HF_hdr_t *hdr = udata->hdr;       /* Fractal heap header */
     htri_t ret_value = FALSE;           /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Check arguments. */
     HDassert(sect);
@@ -1859,11 +1901,11 @@ H5HF_sect_row_can_shrink(const H5FS_section_info_t *_sect, void H5_ATTR_UNUSED *
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_can_shrink() */
+} /* H5HF__sect_row_can_shrink() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_shrink
+ * Function:	H5HF__sect_row_shrink
  *
  * Purpose:	Shrink container with section
  *
@@ -1877,16 +1919,15 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_shrink(H5FS_section_info_t **_sect, void *_udata)
+H5HF__sect_row_shrink(H5FS_section_info_t **_sect, void *_udata)
 {
     H5HF_free_section_t **sect = (H5HF_free_section_t **)_sect;   /* Fractal heap free section */
     H5HF_free_section_t *top_indir_sect; /* Top indirect section for row */
     H5HF_sect_add_ud_t *udata = (H5HF_sect_add_ud_t *)_udata;   /* User callback data */
     H5HF_hdr_t *hdr = udata->hdr;       /* Fractal heap header */
-    hid_t dxpl_id = udata->dxpl_id;     /* DXPL ID for operation */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(sect);
@@ -1897,7 +1938,7 @@ H5HF_sect_row_shrink(H5FS_section_info_t **_sect, void *_udata)
     top_indir_sect = H5HF_sect_indirect_top((*sect)->u.row.under);
 
     /* Shrink away underlying indirect section */
-    if(H5HF_sect_indirect_shrink(hdr, dxpl_id, top_indir_sect) < 0)
+    if(H5HF__sect_indirect_shrink(hdr, top_indir_sect) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't shrink underlying indirect section")
 
     /* Indicate that the section has been released */
@@ -1905,11 +1946,11 @@ H5HF_sect_row_shrink(H5FS_section_info_t **_sect, void *_udata)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_row_shrink() */
+} /* H5HF__sect_row_shrink() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_free_real
+ * Function:	H5HF__sect_row_free_real
  *
  * Purpose:	Free a 'row' section node
  *
@@ -1923,11 +1964,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_free_real(H5HF_free_section_t *sect)
+H5HF__sect_row_free_real(H5HF_free_section_t *sect)
 {
     herr_t ret_value = SUCCEED;               /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(sect);
 
@@ -1937,11 +1978,11 @@ H5HF_sect_row_free_real(H5HF_free_section_t *sect)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}   /* H5HF_sect_row_free_real() */
+}   /* H5HF__sect_row_free_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_free
+ * Function:	H5HF__sect_row_free
  *
  * Purpose:	Free a 'row' section node
  *
@@ -1955,12 +1996,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_free(H5FS_section_info_t *_sect)
+H5HF__sect_row_free(H5FS_section_info_t *_sect)
 {
     H5HF_free_section_t *sect = (H5HF_free_section_t *)_sect;   /* Pointer to section to free */
     herr_t ret_value = SUCCEED;               /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(sect);
     HDassert(sect->u.row.under);
@@ -1970,16 +2011,16 @@ H5HF_sect_row_free(H5FS_section_info_t *_sect)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't detach section node")
 
     /* Release the section */
-    if(H5HF_sect_row_free_real(sect) < 0)
+    if(H5HF__sect_row_free_real(sect) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free section node")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}   /* H5HF_sect_row_free() */
+}   /* H5HF__sect_row_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_valid
+ * Function:	H5HF__sect_row_valid
  *
  * Purpose:	Check the validity of a section
  *
@@ -1992,8 +2033,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_valid(const H5FS_section_class_t *cls, const H5FS_section_info_t *_sect, 
-                    hid_t H5_ATTR_UNUSED dxpl_id)
+H5HF__sect_row_valid(const H5FS_section_class_t *cls, const H5FS_section_info_t *_sect)
 {
     H5HF_sect_private_t *cls_prvt;    /* Pointer to class private info */
     const H5HF_hdr_t *hdr;      /* Fractal heap header */
@@ -2001,7 +2041,7 @@ H5HF_sect_row_valid(const H5FS_section_class_t *cls, const H5FS_section_info_t *
     const H5HF_free_section_t *indir_sect;   /* Pointer to underlying indirect section */
     unsigned indir_idx;         /* Index of row in underlying indirect section's row array */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Basic sanity check */
     HDassert(cls);
@@ -2037,11 +2077,11 @@ H5HF_sect_row_valid(const H5FS_section_class_t *cls, const H5FS_section_info_t *
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-}   /* H5HF_sect_row_valid() */
+}   /* H5HF__sect_row_valid() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_row_debug
+ * Function:	H5HF__sect_row_debug
  *
  * Purpose:	Dump debugging information about an row free space section
  *
@@ -2054,12 +2094,12 @@ H5HF_sect_row_valid(const H5FS_section_class_t *cls, const H5FS_section_info_t *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_row_debug(const H5FS_section_info_t *_sect,
+H5HF__sect_row_debug(const H5FS_section_info_t *_sect,
     FILE *stream, int indent, int fwidth)
 {
     const H5HF_free_section_t *sect = (const H5HF_free_section_t *)_sect;       /* Section to dump info */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Check arguments. */
     HDassert(sect);
@@ -2085,7 +2125,7 @@ H5HF_sect_row_debug(const H5FS_section_info_t *_sect,
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* H5HF_sect_row_debug() */
+} /* H5HF__sect_row_debug() */
 
 
 /*-------------------------------------------------------------------------
@@ -2361,7 +2401,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_init_rows
+ * Function:	H5HF__sect_indirect_init_rows
  *
  * Purpose:	Initialize the derived row sections for a newly created
  *              indirect section
@@ -2375,8 +2415,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_init_rows(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect, hbool_t first_child, H5HF_free_section_t **first_row_sect,
+H5HF__sect_indirect_init_rows(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
+    hbool_t first_child, H5HF_free_section_t **first_row_sect,
     unsigned space_flags, unsigned start_row, unsigned start_col,
     unsigned end_row, unsigned end_col)
 {
@@ -2391,7 +2431,7 @@ H5HF_sect_indirect_init_rows(H5HF_hdr_t *hdr, hid_t dxpl_id,
     unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -2494,11 +2534,10 @@ H5HF_sect_indirect_init_rows(H5HF_hdr_t *hdr, hid_t dxpl_id,
             /* Check to see if we should grab the first row section instead of adding it immediately */
             if(first_row_sect)
                 *first_row_sect = row_sect;
-            else {
+            else
                 /* Add new row section to free space manager for the heap */
-                if(H5HF_space_add(hdr, dxpl_id, row_sect, space_flags) < 0)
+                if(H5HF__space_add(hdr, row_sect, space_flags) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add row section to free space")
-            } /* end else */
 
             /* Increment reference count for underlying indirect section */
             sect->u.indirect.rc++;
@@ -2538,7 +2577,7 @@ H5HF_sect_indirect_init_rows(H5HF_hdr_t *hdr, hid_t dxpl_id,
 
                     /* If the child indirect block's address is defined, protect it */
                     if(H5F_addr_defined(child_iblock_addr)) {
-                        if(NULL == (child_iblock = H5HF_man_iblock_protect(hdr, dxpl_id, child_iblock_addr, child_nrows, sect->u.indirect.u.iblock, curr_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
+                        if(NULL == (child_iblock = H5HF__man_iblock_protect(hdr, child_iblock_addr, child_nrows, sect->u.indirect.u.iblock, curr_entry, FALSE, H5AC__NO_FLAGS_SET, &did_protect)))
                             HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect fractal heap indirect block")
                     } /* end if */
                     else
@@ -2553,7 +2592,7 @@ H5HF_sect_indirect_init_rows(H5HF_hdr_t *hdr, hid_t dxpl_id,
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't create indirect section")
 
                 /* Initialize rows for new indirect section */
-                if(H5HF_sect_indirect_init_rows(hdr, dxpl_id, child_sect,
+                if(H5HF__sect_indirect_init_rows(hdr, child_sect,
                         first_child, first_row_sect, space_flags, 0, 0,
                         (child_nrows - 1), (hdr->man_dtable.cparam.width - 1)) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize indirect section")
@@ -2561,7 +2600,7 @@ H5HF_sect_indirect_init_rows(H5HF_hdr_t *hdr, hid_t dxpl_id,
                 /* If we have a valid child indirect block, release it now */
                 /* (will be pinned, if rows reference it) */
                 if(child_iblock)
-                    if(H5HF_man_iblock_unprotect(child_iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
+                    if(H5HF__man_iblock_unprotect(child_iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
                 /* Attach child section to this section */
@@ -2609,11 +2648,11 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_init_rows() */
+} /* end H5HF__sect_indirect_init_rows() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_add
+ * Function:	H5HF__sect_indirect_add
  *
  * Purpose:	Add a new 'indirect' section to the free space manager for this
  *              heap
@@ -2627,8 +2666,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_sect_indirect_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_indirect_t *iblock, unsigned start_entry, unsigned nentries)
+H5HF__sect_indirect_add(H5HF_hdr_t *hdr, H5HF_indirect_t *iblock,
+    unsigned start_entry, unsigned nentries)
 {
     H5HF_free_section_t *sect = NULL;   /* 'Indirect' free space section to add */
     H5HF_free_section_t *first_row_sect = NULL;   /* First row section in new indirect section */
@@ -2641,7 +2680,7 @@ H5HF_sect_indirect_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
     unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -2671,7 +2710,7 @@ H5HF_sect_indirect_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't create indirect section")
 
     /* Initialize rows for new indirect section */
-    if(H5HF_sect_indirect_init_rows(hdr, dxpl_id, sect, TRUE, &first_row_sect,
+    if(H5HF__sect_indirect_init_rows(hdr, sect, TRUE, &first_row_sect,
             H5FS_ADD_SKIP_VALID, start_row, start_col, end_row, end_col) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize indirect section")
     HDassert(first_row_sect);
@@ -2679,7 +2718,7 @@ H5HF_sect_indirect_add(H5HF_hdr_t *hdr, hid_t dxpl_id,
     /* Now that underlying indirect section is consistent, add first row
      *  section to free space manager for the heap
      */
-    if(H5HF_space_add(hdr, dxpl_id, first_row_sect, H5FS_ADD_RETURNED_SPACE) < 0)
+    if(H5HF__space_add(hdr, first_row_sect, H5FS_ADD_RETURNED_SPACE) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't add row section to free space")
 
 done:
@@ -2688,7 +2727,7 @@ done:
             HDONE_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free indirect section node")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_add() */
+} /* end H5HF__sect_indirect_add() */
 
 
 /*-------------------------------------------------------------------------
@@ -2743,7 +2782,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_revive_row
+ * Function:	H5HF__sect_indirect_revive_row
  *
  * Purpose:	Update the memory information for a 'indirect' free section
  *
@@ -2756,14 +2795,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_revive_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect)
+H5HF__sect_indirect_revive_row(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     H5HF_indirect_t *sec_iblock;        /* Pointer to section indirect block */
     hbool_t did_protect;                /* Whether we protected the indirect block or not */
-    unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -2773,44 +2811,24 @@ H5HF_sect_indirect_revive_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_
     HDassert(sect->sect_info.state == H5FS_SECT_SERIALIZED);
 
     /* Look up indirect block containing indirect blocks for section */
-    if(H5HF_man_dblock_locate(hdr, dxpl_id, sect->sect_info.addr, &sec_iblock, NULL, &did_protect, H5AC__READ_ONLY_FLAG) < 0)
+    if(H5HF__man_dblock_locate(hdr, sect->sect_info.addr, &sec_iblock, NULL, &did_protect, H5AC__READ_ONLY_FLAG) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPUTE, FAIL, "can't compute row & column of section")
 
-    /* Increment reference count on indirect block that free section is in */
-    if(H5HF_iblock_incr(sec_iblock) < 0)
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on shared indirect block")
-
-    /* Set the pointer to the section's indirect block */
-    sect->u.indirect.u.iblock = sec_iblock;
-
-    /* Set the number of entries in the indirect block */
-    sect->u.indirect.iblock_entries = hdr->man_dtable.cparam.width *
-            sect->u.indirect.u.iblock->max_rows;
+    /* Review the section */
+    if(H5HF__sect_indirect_revive(hdr, sect, sec_iblock) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTREVIVE, FAIL, "can't revive indirect section")
 
+done:
     /* Unlock indirect block */
-    if(H5HF_man_iblock_unprotect(sec_iblock, dxpl_id, H5AC__NO_FLAGS_SET, did_protect) < 0)
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
-    sec_iblock = NULL;
-
-    /* Section is "live" now */
-    sect->sect_info.state = H5FS_SECT_LIVE;
-
-    /* Loop over derived row sections and mark them all as 'live' now */
-    for(u = 0; u < sect->u.indirect.dir_nrows; u++)
-        sect->u.indirect.dir_rows[u]->sect_info.state = H5FS_SECT_LIVE;
-
-    /* Revive parent indirect section, if there is one */
-    if(sect->u.indirect.parent && sect->u.indirect.parent->sect_info.state == H5FS_SECT_SERIALIZED)
-        if(H5HF_sect_indirect_revive(hdr, dxpl_id, sect->u.indirect.parent, sect->u.indirect.u.iblock->parent) < 0)
-            HGOTO_ERROR(H5E_HEAP, H5E_CANTREVIVE, FAIL, "can't revive indirect section")
+    if(sec_iblock && H5HF__man_iblock_unprotect(sec_iblock, H5AC__NO_FLAGS_SET, did_protect) < 0)
+        HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release fractal heap indirect block")
 
-done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_revive_row() */
+} /* end H5HF__sect_indirect_revive_row() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_revive
+ * Function:	H5HF__sect_indirect_revive
  *
  * Purpose:	Update the memory information for a 'indirect' free section
  *
@@ -2823,13 +2841,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *sect, H5HF_indirect_t *sect_iblock)
+H5HF__sect_indirect_revive(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
+    H5HF_indirect_t *sect_iblock)
 {
     unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -2859,16 +2877,16 @@ H5HF_sect_indirect_revive(H5HF_hdr_t *hdr, hid_t dxpl_id,
 
     /* Revive parent indirect section, if there is one */
     if(sect->u.indirect.parent && sect->u.indirect.parent->sect_info.state == H5FS_SECT_SERIALIZED)
-        if(H5HF_sect_indirect_revive(hdr, dxpl_id, sect->u.indirect.parent, sect->u.indirect.u.iblock->parent) < 0)
+        if(H5HF__sect_indirect_revive(hdr, sect->u.indirect.parent, sect->u.indirect.u.iblock->parent) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTREVIVE, FAIL, "can't revive indirect section")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_revive() */
+} /* end H5HF__sect_indirect_revive() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_reduce_row
+ * Function:	H5HF__sect_indirect_reduce_row
  *
  * Purpose:	Remove a block from an indirect section (possibly freeing it)
  *              and re-add it back to the free space manager for the heap
@@ -2883,7 +2901,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_reduce_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *row_sect,
+H5HF__sect_indirect_reduce_row(H5HF_hdr_t *hdr, H5HF_free_section_t *row_sect,
     hbool_t *alloc_from_start)
 {
     H5HF_free_section_t *sect;          /* Indirect section underlying row section */
@@ -2898,7 +2916,7 @@ H5HF_sect_indirect_reduce_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_
     H5HF_free_section_t *peer_sect = NULL; /* Peer indirect section */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -2943,14 +2961,14 @@ H5HF_sect_indirect_reduce_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_
         is_first = H5HF_sect_indirect_is_first(sect);
 
         /* Remove this indirect section from parent indirect section */
-        if(H5HF_sect_indirect_reduce(hdr, dxpl_id, sect->u.indirect.parent, sect->u.indirect.par_entry) < 0)
+        if(H5HF__sect_indirect_reduce(hdr, sect->u.indirect.parent, sect->u.indirect.par_entry) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't reduce parent indirect section")
         sect->u.indirect.parent = NULL;
         sect->u.indirect.par_entry = 0;
 
         /* If we weren't the first section, set "first row" for this indirect section */
         if(!is_first)
-            if(H5HF_sect_indirect_first(hdr, dxpl_id, sect) < 0)
+            if(H5HF__sect_indirect_first(hdr, sect) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't make new 'first row' for indirect section")
     } /* end if */
 
@@ -2985,7 +3003,7 @@ H5HF_sect_indirect_reduce_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_
 
                     /* Make new "first row" in indirect section */
                     if(row_sect->sect_info.type == H5HF_FSPACE_SECT_FIRST_ROW)
-                        if(H5HF_sect_row_first(hdr, dxpl_id, sect->u.indirect.dir_rows[0]) < 0)
+                        if(H5HF__sect_row_first(hdr, sect->u.indirect.dir_rows[0]) < 0)
                             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't make new 'first row' for indirect section")
                 } /* end if */
                 else {
@@ -2998,7 +3016,7 @@ H5HF_sect_indirect_reduce_row(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_
 
                     /* Make new "first row" in indirect section */
                     if(row_sect->sect_info.type == H5HF_FSPACE_SECT_FIRST_ROW)
-                        if(H5HF_sect_indirect_first(hdr, dxpl_id, sect->u.indirect.indir_ents[0]) < 0)
+                        if(H5HF__sect_indirect_first(hdr, sect->u.indirect.indir_ents[0]) < 0)
                             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't make new 'first row' for child indirect section")
                 } /* end else */
             } /* end if */
@@ -3135,11 +3153,11 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_reduce_row() */
+} /* end H5HF__sect_indirect_reduce_row() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_reduce
+ * Function:	H5HF__sect_indirect_reduce
  *
  * Purpose:	Reduce the size of a indirect section (possibly freeing it)
  *              and re-add it back to the free space manager for the heap
@@ -3154,7 +3172,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect,
+H5HF__sect_indirect_reduce(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
     unsigned child_entry)
 {
     unsigned start_entry;               /* Entry for first block covered */
@@ -3165,7 +3183,7 @@ H5HF_sect_indirect_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *s
     H5HF_free_section_t *peer_sect = NULL; /* Peer indirect section */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -3192,14 +3210,14 @@ H5HF_sect_indirect_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *s
             is_first = H5HF_sect_indirect_is_first(sect);
 
             /* Reduce parent indirect section */
-            if(H5HF_sect_indirect_reduce(hdr, dxpl_id, sect->u.indirect.parent, sect->u.indirect.par_entry) < 0)
+            if(H5HF__sect_indirect_reduce(hdr, sect->u.indirect.parent, sect->u.indirect.par_entry) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTSHRINK, FAIL, "can't reduce parent indirect section")
             sect->u.indirect.parent = NULL;
             sect->u.indirect.par_entry = 0;
 
             /* If we weren't the first section, set "first row" for this indirect section */
             if(!is_first)
-                if(H5HF_sect_indirect_first(hdr, dxpl_id, sect) < 0)
+                if(H5HF__sect_indirect_first(hdr, sect) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't make new 'first row' for indirect section")
         } /* end if */
 
@@ -3231,7 +3249,7 @@ H5HF_sect_indirect_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *s
             HDassert(sect->u.indirect.indir_ents[0]);
 
             /* Make new "first row" in new first indirect child section */
-            if(H5HF_sect_indirect_first(hdr, dxpl_id, sect->u.indirect.indir_ents[0]) < 0)
+            if(H5HF__sect_indirect_first(hdr, sect->u.indirect.indir_ents[0]) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't make new 'first row' for child indirect section")
         } /* end if */
         else if(child_entry == end_entry) {
@@ -3337,7 +3355,7 @@ H5HF_sect_indirect_reduce(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *s
                     (peer_sect->u.indirect.indir_nents + peer_sect->u.indirect.dir_nrows));
 
             /* Make new "first row" in peer section */
-            if(H5HF_sect_indirect_first(hdr, dxpl_id, peer_sect->u.indirect.indir_ents[0]) < 0)
+            if(H5HF__sect_indirect_first(hdr, peer_sect->u.indirect.indir_ents[0]) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't make new 'first row' for peer indirect section")
 
             /* Reset the peer_sect variable, to indicate that it has been hooked into the data structures correctly and shouldn't be freed */
@@ -3371,7 +3389,7 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_reduce() */
+} /* end H5HF__sect_indirect_reduce() */
 
 
 /*-------------------------------------------------------------------------
@@ -3410,7 +3428,7 @@ H5HF_sect_indirect_is_first(H5HF_free_section_t *sect)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_first
+ * Function:	H5HF__sect_indirect_first
  *
  * Purpose:	Make new 'first row' for indirect section
  *
@@ -3423,11 +3441,11 @@ H5HF_sect_indirect_is_first(H5HF_free_section_t *sect)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_first(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect)
+H5HF__sect_indirect_first(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(hdr);
@@ -3442,7 +3460,7 @@ H5HF_sect_indirect_first(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *se
         HDassert(sect->u.indirect.dir_rows[0]);
 
         /* Change first row section in indirect section to be the "first row" */
-        if(H5HF_sect_row_first(hdr, dxpl_id, sect->u.indirect.dir_rows[0]) < 0)
+        if(H5HF__sect_row_first(hdr, sect->u.indirect.dir_rows[0]) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSET, FAIL, "can't set row section to be first row")
     } /* end if */
     else {
@@ -3452,13 +3470,13 @@ H5HF_sect_indirect_first(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *se
         HDassert(sect->u.indirect.indir_ents[0]);
 
         /* Forward to first child indirect section */
-        if(H5HF_sect_indirect_first(hdr, dxpl_id, sect->u.indirect.indir_ents[0]) < 0)
+        if(H5HF__sect_indirect_first(hdr, sect->u.indirect.indir_ents[0]) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTSET, FAIL, "can't set child indirect section to be first row")
     } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_first() */
+} /* end H5HF__sect_indirect_first() */
 
 
 /*-------------------------------------------------------------------------
@@ -3491,7 +3509,7 @@ H5HF_sect_indirect_get_iblock(H5HF_free_section_t *sect)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_merge_row
+ * Function:	H5HF__sect_indirect_merge_row
  *
  * Purpose:	Merge two sections of this type
  *
@@ -3507,8 +3525,8 @@ H5HF_sect_indirect_get_iblock(H5HF_free_section_t *sect)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    H5HF_free_section_t *row_sect1, H5HF_free_section_t *row_sect2)
+H5HF__sect_indirect_merge_row(H5HF_hdr_t *hdr, H5HF_free_section_t *row_sect1,
+    H5HF_free_section_t *row_sect2)
 {
     H5HF_free_section_t *sect1, *sect2; /* Indirect sections underlying row sections */
     unsigned start_entry1;              /* Start entry for section #1 */
@@ -3520,16 +3538,14 @@ H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
     unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check parameters */
     HDassert(hdr);
     HDassert(row_sect1);
     HDassert(row_sect1->u.row.under);
-    HDassert(row_sect1->sect_info.state == H5FS_SECT_LIVE);
     HDassert(row_sect2);
     HDassert(row_sect2->u.row.under);
-    HDassert(row_sect2->sect_info.state == H5FS_SECT_LIVE);
     HDassert(row_sect2->sect_info.type == H5HF_FSPACE_SECT_FIRST_ROW);
 
     /* Set up indirect section information */
@@ -3539,13 +3555,8 @@ H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
     HDassert(sect2);
 
     /* Sanity check some assumptions about the indirect sections */
-    HDassert(sect1->sect_info.state == H5FS_SECT_LIVE);
     HDassert(sect1->u.indirect.span_size > 0);
-    HDassert(sect1->u.indirect.iblock_entries > 0);
-    HDassert(sect2->sect_info.state == H5FS_SECT_LIVE);
     HDassert(sect2->u.indirect.span_size > 0);
-    HDassert(sect2->u.indirect.iblock_entries > 0);
-    HDassert(sect1->u.indirect.iblock_entries == sect2->u.indirect.iblock_entries);
 
     /* Set up span information */
     start_row1 = sect1->u.indirect.row;
@@ -3560,6 +3571,7 @@ H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
      *          row, and thus have no row sections of it's own)
      */
     if(sect2->u.indirect.dir_nrows > 0) {
+        hsize_t sect1_iblock_off, sect2_iblock_off;     /* Offset of indirect block underlying row section */
         unsigned new_dir_nrows1;        /* New value for number of direct rows in first section */
         unsigned src_row2;              /* Source row for copying from second section */
         unsigned nrows_moved2;          /* Number of rows to move from second section to first */
@@ -3573,9 +3585,18 @@ H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
         HDassert(sect1->u.indirect.dir_nrows > 0);
         HDassert(sect1->u.indirect.dir_rows);
 
+        /* Get the offsets for the indirect blocks under the rows */
+        if(H5FS_SECT_LIVE == row_sect1->u.row.under->sect_info.state)
+            sect1_iblock_off = row_sect1->u.row.under->u.indirect.u.iblock->block_off;
+        else
+            sect1_iblock_off = row_sect1->u.row.under->u.indirect.u.iblock_off;
+        if(H5FS_SECT_LIVE == row_sect2->u.row.under->sect_info.state)
+            sect2_iblock_off = row_sect2->u.row.under->u.indirect.u.iblock->block_off;
+        else
+            sect2_iblock_off = row_sect2->u.row.under->u.indirect.u.iblock_off;
+
         /* Check for sections sharing a row in the same underlying indirect block */
-        if(row_sect1->u.row.under->u.indirect.u.iblock->block_off == row_sect2->u.row.under->u.indirect.u.iblock->block_off
-                && end_row1 == start_row2) {
+        if(sect1_iblock_off == sect2_iblock_off && end_row1 == start_row2) {
             H5HF_free_section_t *last_row_sect1;        /* Last row in first indirect section */
 
             /* Locate the last row section in first indirect section, if we don't already have it */
@@ -3691,14 +3712,14 @@ H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
             (sect1->u.indirect.indir_nents + sect1->u.indirect.dir_nrows));
 
     /* Wrap up, freeing or re-inserting second row section */
-    /* (want this to be after the first indirection section is consistent again) */
+    /* (want this to be after the first indirect section is consistent again) */
     if(merged_rows) {
         /* Release second row section */
         /* (indirectly releases second indirect section, since all of it's
          *  other dependents are gone)
          */
         HDassert(sect2->u.indirect.rc == 1);
-        if(H5HF_sect_row_free((H5FS_section_info_t *)row_sect2) < 0)
+        if(H5HF__sect_row_free((H5FS_section_info_t *)row_sect2) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free row section")
     } /* end if */
     else {
@@ -3717,7 +3738,7 @@ H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
          *  from the free space manager and needs to be re-added)
         */
         row_sect2->sect_info.type = H5HF_FSPACE_SECT_NORMAL_ROW;
-        if(H5HF_space_add(hdr, dxpl_id, row_sect2, H5FS_ADD_SKIP_VALID) < 0)
+        if(H5HF__space_add(hdr, row_sect2, H5FS_ADD_SKIP_VALID) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't re-add second row section to free space")
     } /* end else */
 
@@ -3726,17 +3747,17 @@ H5HF_sect_indirect_merge_row(H5HF_hdr_t *hdr, hid_t dxpl_id,
     if(sect1->u.indirect.iblock_entries == sect1->u.indirect.num_entries) {
         /* Build parent section for fully populated indirect section */
         HDassert(sect1->u.indirect.parent == NULL);
-        if(H5HF_sect_indirect_build_parent(hdr, sect1) < 0)
+        if(H5HF__sect_indirect_build_parent(hdr, sect1) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTCREATE, FAIL, "can't create parent for full indirect section")
     } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_merge_row() */
+} /* end H5HF__sect_indirect_merge_row() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_build_parent
+ * Function:	H5HF__sect_indirect_build_parent
  *
  * Purpose:	Build a parent indirect section for a full indirect section
  *
@@ -3749,19 +3770,21 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_build_parent(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
+H5HF__sect_indirect_build_parent(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     H5HF_indirect_t *par_iblock;        /* Indirect block for parent section */
     H5HF_free_section_t *par_sect = NULL; /* Parent indirect section */
+    hsize_t par_block_off;              /* Offset of parent's block */
     unsigned par_row, par_col;          /* Row & column in parent indirect section */
     unsigned par_entry;                 /* Entry within parent indirect section */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check parameters */
     HDassert(hdr);
     HDassert(sect);
+    HDassert(H5FS_SECT_LIVE == sect->sect_info.state);
     HDassert(sect->u.indirect.span_size > 0);
     HDassert(sect->u.indirect.iblock_entries > 0);
     HDassert(sect->u.indirect.iblock_entries == sect->u.indirect.num_entries);
@@ -3769,16 +3792,26 @@ H5HF_sect_indirect_build_parent(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
     HDassert(sect->u.indirect.parent == NULL);
 
     /* Get information for creating parent indirect section */
-    par_entry = sect->u.indirect.u.iblock->par_entry;
+    if(sect->u.indirect.u.iblock->parent) {
+        par_entry = sect->u.indirect.u.iblock->par_entry;
+        par_iblock = sect->u.indirect.u.iblock->parent;
+        par_block_off = par_iblock->block_off;
+    } /* end if */
+    else {
+        /* Retrieve the information for the parent block */
+        if(H5HF__man_iblock_parent_info(hdr, sect->sect_info.addr, &par_block_off, &par_entry) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't get block entry")
+        par_iblock = NULL;
+    } /* end else */
+
+    /* Compute row & column for block in parent */
     par_row = par_entry / hdr->man_dtable.cparam.width;
     par_col = par_entry % hdr->man_dtable.cparam.width;
     HDassert(par_row >= hdr->man_dtable.max_direct_rows);
-    par_iblock = sect->u.indirect.u.iblock->parent;
-    HDassert(par_iblock);
 
     /* Create parent indirect section */
     if(NULL == (par_sect = H5HF_sect_indirect_new(hdr, sect->sect_info.addr,
-            sect->sect_info.size, par_iblock, par_iblock->block_off,
+            sect->sect_info.size, par_iblock, par_block_off,
             par_row, par_col, 1)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't create indirect section")
 
@@ -3803,11 +3836,11 @@ done:
             HDONE_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free indirect section node")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_build_parent() */
+} /* end H5HF__sect_indirect_build_parent() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_shrink
+ * Function:	H5HF__sect_indirect_shrink
  *
  * Purpose:	"Shrink" container w/section
  *
@@ -3820,12 +3853,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_sect_indirect_shrink(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect)
+H5HF__sect_indirect_shrink(H5HF_hdr_t *hdr, H5HF_free_section_t *sect)
 {
     unsigned u;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check parameters */
     HDassert(hdr);
@@ -3839,18 +3872,18 @@ H5HF_sect_indirect_shrink(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *s
         /* Remove the normal rows from free space manager */
         if(sect->u.indirect.dir_rows[u]->sect_info.type != H5HF_FSPACE_SECT_FIRST_ROW) {
             HDassert(sect->u.indirect.dir_rows[u]->sect_info.type == H5HF_FSPACE_SECT_NORMAL_ROW);
-            if(H5HF_space_remove(hdr, dxpl_id, sect->u.indirect.dir_rows[u]) < 0)
+            if(H5HF__space_remove(hdr, sect->u.indirect.dir_rows[u]) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove section from heap free space")
         } /* end if */
 
         /* Release the row section */
-        if(H5HF_sect_row_free_real(sect->u.indirect.dir_rows[u]) < 0)
+        if(H5HF__sect_row_free_real(sect->u.indirect.dir_rows[u]) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free child section node")
     } /* end for */
 
     /* Walk through indirect entries, freeing them (recursively) */
     for(u = 0; u < sect->u.indirect.indir_nents; u++)
-        if(H5HF_sect_indirect_shrink(hdr, dxpl_id, sect->u.indirect.indir_ents[u]) < 0)
+        if(H5HF__sect_indirect_shrink(hdr, sect->u.indirect.indir_ents[u]) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't free child section node")
 
     /* Free the indirect section itself */
@@ -3859,7 +3892,7 @@ H5HF_sect_indirect_shrink(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *s
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_sect_indirect_shrink() */
+} /* end H5HF__sect_indirect_shrink() */
 
 
 /*-------------------------------------------------------------------------
@@ -3920,12 +3953,11 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_sect_indirect_deserialize
+ * Function:	H5HF__sect_indirect_deserialize
  *
  * Purpose:	Deserialize a buffer into a "live" indirect section
  *
  * Return:	Success:	non-negative
- *
  *		Failure:	negative
  *
  * Programmer:	Quincey Koziol
@@ -3934,9 +3966,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5FS_section_info_t *
-H5HF_sect_indirect_deserialize(H5HF_hdr_t *hdr, hid_t dxpl_id,
-    const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
-    unsigned *des_flags)
+H5HF__sect_indirect_deserialize(H5HF_hdr_t *hdr, const uint8_t *buf,
+    haddr_t sect_addr, hsize_t sect_size, unsigned *des_flags)
 {
     H5HF_free_section_t *new_sect;      /* New indirect section */
     hsize_t iblock_off;                 /* Indirect block's offset */
@@ -3949,7 +3980,7 @@ H5HF_sect_indirect_deserialize(H5HF_hdr_t *hdr, hid_t dxpl_id,
     unsigned end_col;                   /* End column in indirect block */
     H5FS_section_info_t *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments. */
     HDassert(hdr);
@@ -3983,7 +4014,7 @@ H5HF_sect_indirect_deserialize(H5HF_hdr_t *hdr, hid_t dxpl_id,
     end_col = end_entry % hdr->man_dtable.cparam.width;
 
     /* Initialize rows for new indirect section */
-    if(H5HF_sect_indirect_init_rows(hdr, dxpl_id, new_sect, TRUE, NULL,
+    if(H5HF__sect_indirect_init_rows(hdr, new_sect, TRUE, NULL,
             H5FS_ADD_DESERIALIZING, new_sect->u.indirect.row, new_sect->u.indirect.col,
             end_row, end_col) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, NULL, "can't initialize indirect section")
@@ -3996,7 +4027,7 @@ H5HF_sect_indirect_deserialize(H5HF_hdr_t *hdr, hid_t dxpl_id,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_sect_indirect_deserialize() */
+} /* H5HF__sect_indirect_deserialize() */
 
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HFspace.c b/src/H5HFspace.c
index 20057e4..5d659a6 100644
--- a/src/H5HFspace.c
+++ b/src/H5HFspace.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -80,7 +78,7 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_start
+ * Function:	H5HF__space_start
  *
  * Purpose:	"Start up" free space for heap - open existing free space
  *              structure if one exists, otherwise create a new free space
@@ -94,15 +92,10 @@
  *		koziol@ncsa.uiuc.edu
  *		May  2 2006
  *
- * Modifications:
- *	Vailin Choi, July 29th, 2008
- *	  Pass values of alignment and threshold to FS_create() and FS_open()
- *	  for handling alignment.
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t may_create)
+H5HF__space_start(H5HF_hdr_t *hdr, hbool_t may_create)
 {
     const H5FS_section_class_t *classes[] = { /* Free space section classes implemented for fractal heap */
         H5HF_FSPACE_SECT_CLS_SINGLE,
@@ -111,7 +104,7 @@ H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t may_create)
         H5HF_FSPACE_SECT_CLS_INDIRECT};
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -121,7 +114,7 @@ H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t may_create)
     /* Check for creating free space info for the heap */
     if(H5F_addr_defined(hdr->fs_addr)) {
         /* Open an existing free space structure for the heap */
-        if(NULL == (hdr->fspace = H5FS_open(hdr->f, dxpl_id, hdr->fs_addr,
+        if(NULL == (hdr->fspace = H5FS_open(hdr->f, hdr->fs_addr,
                 NELMTS(classes), classes, hdr, (hsize_t)H5HF_FSPACE_THRHD_DEF, (hsize_t)H5HF_FSPACE_ALIGN_DEF)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize free space info")
     } /* end if */
@@ -138,7 +131,7 @@ H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t may_create)
             fs_create.max_sect_addr = hdr->man_dtable.cparam.max_index;
 
             /* Create the free space structure for the heap */
-            if(NULL == (hdr->fspace = H5FS_create(hdr->f, dxpl_id, &hdr->fs_addr,
+            if(NULL == (hdr->fspace = H5FS_create(hdr->f, &hdr->fs_addr,
                     &fs_create, NELMTS(classes), classes, hdr, (hsize_t)H5HF_FSPACE_THRHD_DEF, (hsize_t)H5HF_FSPACE_ALIGN_DEF)))
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize free space info")
             HDassert(H5F_addr_defined(hdr->fs_addr));
@@ -147,11 +140,11 @@ H5HF_space_start(H5HF_hdr_t *hdr, hid_t dxpl_id, hbool_t may_create)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_start() */
+} /* end H5HF__space_start() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_add
+ * Function:	H5HF__space_add
  *
  * Purpose:	Add a section to the free space for the heap
  *
@@ -166,13 +159,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_add(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *node,
-    unsigned flags)
+H5HF__space_add(H5HF_hdr_t *hdr, H5HF_free_section_t *node, unsigned flags)
 {
     H5HF_sect_add_ud_t udata;          /* User data for free space manager 'add' */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -182,29 +174,27 @@ H5HF_space_add(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *node,
 
     /* Check if the free space for the heap has been initialized */
     if(!hdr->fspace)
-        if(H5HF_space_start(hdr, dxpl_id, TRUE) < 0)
+        if(H5HF__space_start(hdr, TRUE) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize heap free space")
 
     /* Construct user data */
     udata.hdr = hdr;
-    udata.dxpl_id = dxpl_id;
 
     /* Add to the free space for the heap */
-    if(H5FS_sect_add(hdr->f, dxpl_id, hdr->fspace, (H5FS_section_info_t *)node, flags, &udata) < 0)
+    if(H5FS_sect_add(hdr->f, hdr->fspace, (H5FS_section_info_t *)node, flags, &udata) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINSERT, FAIL, "can't add section to heap free space")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_add() */
+} /* end H5HF__space_add() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_find
+ * Function:	H5HF__space_find
  *
  * Purpose:	Attempt to find space in a fractal heap
  *
  * Return:	Success:	non-negative
- *
  *		Failure:	negative
  *
  * Programmer:	Quincey Koziol
@@ -214,12 +204,12 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5HF_space_find(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t request, H5HF_free_section_t **node)
+H5HF__space_find(H5HF_hdr_t *hdr, hsize_t request, H5HF_free_section_t **node)
 {
     htri_t node_found = FALSE;  /* Whether an existing free list node was found */
     htri_t ret_value = FAIL;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -230,12 +220,12 @@ H5HF_space_find(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t request, H5HF_free_secti
 
     /* Check if the free space for the heap has been initialized */
     if(!hdr->fspace)
-        if(H5HF_space_start(hdr, dxpl_id, FALSE) < 0)
+        if(H5HF__space_start(hdr, FALSE) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize heap free space")
 
     /* Search for free space in the heap */
     if(hdr->fspace)
-        if((node_found = H5FS_sect_find(hdr->f, dxpl_id, hdr->fspace, request, (H5FS_section_info_t **)node)) < 0)
+        if((node_found = H5FS_sect_find(hdr->f, hdr->fspace, request, (H5FS_section_info_t **)node)) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "can't locate free space in fractal heap")
 
     /* Set return value */
@@ -243,7 +233,7 @@ H5HF_space_find(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t request, H5HF_free_secti
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_find() */
+} /* end H5HF__space_find() */
 
 
 /*-------------------------------------------------------------------------
@@ -279,7 +269,7 @@ H5HF_space_revert_root_cb(H5FS_section_info_t *_sect, void H5_ATTR_UNUSED *_udat
     if(sect->sect_info.type == H5HF_FSPACE_SECT_SINGLE && sect->sect_info.state == H5FS_SECT_LIVE) {
         /* Release hold on previous indirect block (we must have one) */
         HDassert(sect->u.single.parent);
-        if(H5HF_iblock_decr(sect->u.single.parent) < 0)
+        if(H5HF__iblock_decr(sect->u.single.parent) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTDEC, FAIL, "can't decrement reference count on section's indirect block")
 
         /* Reset parent information */
@@ -293,7 +283,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_revert_root
+ * Function:	H5HF__space_revert_root
  *
  * Purpose:	Reset 'parent' pointers in sections, when the heap is
  *		changing from having a root indirect block to a direct block.
@@ -308,11 +298,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_revert_root(const H5HF_hdr_t *hdr, hid_t dxpl_id)
+H5HF__space_revert_root(const H5HF_hdr_t *hdr)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -320,15 +310,14 @@ H5HF_space_revert_root(const H5HF_hdr_t *hdr, hid_t dxpl_id)
     HDassert(hdr);
 
     /* Only need to scan the sections if the free space has been initialized */
-    if(hdr->fspace) {
+    if(hdr->fspace)
 	/* Iterate over all sections, reseting the parent pointers in 'single' sections */
-        if(H5FS_sect_iterate(hdr->f, dxpl_id, hdr->fspace, H5HF_space_revert_root_cb, NULL) < 0)
+        if(H5FS_sect_iterate(hdr->f, hdr->fspace, H5HF_space_revert_root_cb, NULL) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_BADITER, FAIL, "can't iterate over sections to reset parent pointers")
-    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_revert_root() */
+} /* end H5HF__space_revert_root() */
 
 
 /*-------------------------------------------------------------------------
@@ -385,7 +374,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_create_root
+ * Function:	H5HF__space_create_root
  *
  * Purpose:	Set 'parent' pointers in sections to new indirect block, when
  *		the heap is changing from having a root direct block to a
@@ -401,11 +390,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_create_root(const H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *root_iblock)
+H5HF__space_create_root(const H5HF_hdr_t *hdr, H5HF_indirect_t *root_iblock)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -414,19 +403,18 @@ H5HF_space_create_root(const H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_indirect_t *ro
     HDassert(root_iblock);
 
     /* Only need to scan the sections if the free space has been initialized */
-    if(hdr->fspace) {
+    if(hdr->fspace)
 	/* Iterate over all sections, seting the parent pointers in 'single' sections to the new indirect block */
-        if(H5FS_sect_iterate(hdr->f, dxpl_id, hdr->fspace, H5HF_space_create_root_cb, root_iblock) < 0)
+        if(H5FS_sect_iterate(hdr->f, hdr->fspace, H5HF_space_create_root_cb, root_iblock) < 0)
             HGOTO_ERROR(H5E_FSPACE, H5E_BADITER, FAIL, "can't iterate over sections to set parent pointers")
-    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_create_root() */
+} /* end H5HF__space_create_root() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_size
+ * Function:	H5HF__space_size
  *
  * Purpose:	Query the size of the heap's free space info on disk
  *
@@ -440,11 +428,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_size(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t *fs_size)
+H5HF__space_size(H5HF_hdr_t *hdr, hsize_t *fs_size)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -454,7 +442,7 @@ H5HF_space_size(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t *fs_size)
 
     /* Check if the free space for the heap has been initialized */
     if(!hdr->fspace)
-        if(H5HF_space_start(hdr, dxpl_id, FALSE) < 0)
+        if(H5HF__space_start(hdr, FALSE) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "can't initialize heap free space")
 
     /* Get free space metadata size */
@@ -467,11 +455,11 @@ H5HF_space_size(H5HF_hdr_t *hdr, hid_t dxpl_id, hsize_t *fs_size)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_size() */
+} /* end H5HF__space_size() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_remove
+ * Function:	H5HF__space_remove
  *
  * Purpose:	Remove a section from the free space for the heap
  *
@@ -485,11 +473,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *node)
+H5HF__space_remove(H5HF_hdr_t *hdr, H5HF_free_section_t *node)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -499,16 +487,16 @@ H5HF_space_remove(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *node)
     HDassert(node);
 
     /* Remove from the free space for the heap */
-    if(H5FS_sect_remove(hdr->f, dxpl_id, hdr->fspace, (H5FS_section_info_t *)node) < 0)
+    if(H5FS_sect_remove(hdr->f, hdr->fspace, (H5FS_section_info_t *)node) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTREMOVE, FAIL, "can't remove section from heap free space")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_remove() */
+} /* end H5HF__space_remove() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_close
+ * Function:	H5HF__space_close
  *
  * Purpose:	Close the free space for the heap
  *
@@ -523,11 +511,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_close(H5HF_hdr_t *hdr, hid_t dxpl_id)
+H5HF__space_close(H5HF_hdr_t *hdr)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -546,13 +534,13 @@ HDfprintf(stderr, "%s: nsects = %Hu\n", FUNC, nsects);
 #endif /* QAK */
 
         /* Close the free space for the heap */
-        if(H5FS_close(hdr->f, dxpl_id, hdr->fspace) < 0)
+        if(H5FS_close(hdr->f, hdr->fspace) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release free space info")
         hdr->fspace = NULL;
 
         /* Check if we can delete the free space manager for this heap */
         if(!nsects) {
-            if(H5FS_delete(hdr->f, dxpl_id, hdr->fs_addr) < 0)
+            if(H5FS_delete(hdr->f, hdr->fs_addr) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTDELETE, FAIL, "can't delete free space info")
             hdr->fs_addr = HADDR_UNDEF;
         } /* end if */
@@ -560,11 +548,11 @@ HDfprintf(stderr, "%s: nsects = %Hu\n", FUNC, nsects);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_close() */
+} /* end H5HF__space_close() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_delete
+ * Function:	H5HF__space_delete
  *
  * Purpose:	Delete the free space manager for the heap
  *
@@ -578,11 +566,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
+H5HF__space_delete(H5HF_hdr_t *hdr)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /*
      * Check arguments.
@@ -590,16 +578,16 @@ H5HF_space_delete(H5HF_hdr_t *hdr, hid_t dxpl_id)
     HDassert(hdr);
 
     /* Delete the free space manager */
-    if(H5FS_delete(hdr->f, dxpl_id, hdr->fs_addr) < 0)
+    if(H5FS_delete(hdr->f, hdr->fs_addr) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTFREE, FAIL, "can't delete to free space manager")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_delete() */
+} /* end H5HF__space_delete() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_space_change_sect_class
+ * Function:	H5HF__space_sect_change_class
  *
  * Purpose:	Change a section's class
  *
@@ -614,11 +602,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_space_sect_change_class(H5HF_hdr_t *hdr, hid_t dxpl_id, H5HF_free_section_t *sect, uint16_t new_class)
+H5HF__space_sect_change_class(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
+    uint16_t new_class)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 #ifdef QAK
 HDfprintf(stderr, "%s: Called\n", FUNC);
 #endif /* QAK */
@@ -631,10 +620,10 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     HDassert(sect);
 
     /* Notify the free space manager that a section has changed class */
-    if(H5FS_sect_change_class(hdr->f, dxpl_id, hdr->fspace, (H5FS_section_info_t *)sect, new_class) < 0)
+    if(H5FS_sect_change_class(hdr->f, hdr->fspace, (H5FS_section_info_t *)sect, new_class) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_CANTMODIFY, FAIL, "can't modify class of free space section")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5HF_space_sect_change_class() */
+} /* end H5HF__space_sect_change_class() */
 
diff --git a/src/H5HFstat.c b/src/H5HFstat.c
index 303b1f4..7d18ba6 100644
--- a/src/H5HFstat.c
+++ b/src/H5HFstat.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
@@ -125,7 +123,7 @@ H5HF_stat_info(const H5HF_t *fh, H5HF_stat_t *stats)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HF_size(const H5HF_t *fh, hid_t dxpl_id, hsize_t *heap_size)
+H5HF_size(const H5HF_t *fh, hsize_t *heap_size)
 {
     H5HF_hdr_t *hdr;                    /* Fractal heap header */
     H5B2_t      *bt2 = NULL;            /* v2 B-tree handle for index */
@@ -150,30 +148,30 @@ H5HF_size(const H5HF_t *fh, hid_t dxpl_id, hsize_t *heap_size)
 
     /* Check for indirect blocks for managed objects */
     if(H5F_addr_defined(hdr->man_dtable.table_addr) && hdr->man_dtable.curr_root_rows != 0)
-        if(H5HF_man_iblock_size(hdr->f, dxpl_id, hdr, hdr->man_dtable.table_addr, hdr->man_dtable.curr_root_rows, NULL, 0, heap_size) < 0)
+        if(H5HF__man_iblock_size(hdr->f, hdr, hdr->man_dtable.table_addr, hdr->man_dtable.curr_root_rows, NULL, 0, heap_size) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "unable to get fractal heap storage info for indirect block")
 
     /* Check for B-tree storage of huge objects in fractal heap */
     if(H5F_addr_defined(hdr->huge_bt2_addr)) {
         /* Open the huge object index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+        if(NULL == (bt2 = H5B2_open(hdr->f, hdr->huge_bt2_addr, hdr->f)))
             HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' objects")
 
         /* Get the B-tree storage */
-        if(H5B2_size(bt2, dxpl_id, heap_size) < 0)
+        if(H5B2_size(bt2, heap_size) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't retrieve B-tree storage info")
     } /* end if */
 
     /* Get storage for free-space tracking info */
     if(H5F_addr_defined(hdr->fs_addr)) {
-        if(H5HF_space_size(hdr, dxpl_id, &meta_size) < 0)
+        if(H5HF__space_size(hdr, &meta_size) < 0)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't retrieve FS meta storage info")
 	*heap_size += meta_size;
     } /* end if */
 
 done:
     /* Release resources */
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for tracking 'huge' objects")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5HFtest.c b/src/H5HFtest.c
index 4b97194..1b1f688 100644
--- a/src/H5HFtest.c
+++ b/src/H5HFtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
diff --git a/src/H5HFtiny.c b/src/H5HFtiny.c
index 711ceb9..79462e9 100644
--- a/src/H5HFtiny.c
+++ b/src/H5HFtiny.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HG.c b/src/H5HG.c
index e8eb2eb..53f1b2a 100644
--- a/src/H5HG.c
+++ b/src/H5HG.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -84,7 +82,7 @@
 /* Local Prototypes */
 /********************/
 
-static haddr_t H5HG_create(H5F_t *f, hid_t dxpl_id, size_t size);
+static haddr_t H5HG__create(H5F_t *f, size_t size);
 
 
 /*********************/
@@ -116,7 +114,7 @@ H5FL_BLK_DEFINE(gheap_chunk);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HG_create
+ * Function:	H5HG__create
  *
  * Purpose:	Creates a global heap collection of the specified size.  If
  *		SIZE is less than some minimum it will be readjusted.  The
@@ -135,7 +133,7 @@ H5FL_BLK_DEFINE(gheap_chunk);
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5HG_create(H5F_t *f, hid_t dxpl_id, size_t size)
+H5HG__create(H5F_t *f, size_t size)
 {
     H5HG_heap_t	*heap = NULL;
     uint8_t	*p = NULL;
@@ -143,7 +141,7 @@ H5HG_create(H5F_t *f, hid_t dxpl_id, size_t size)
     size_t	n;
     haddr_t	ret_value = HADDR_UNDEF;        /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__GLOBALHEAP_TAG, HADDR_UNDEF)
+    FUNC_ENTER_STATIC_TAG(H5AC__GLOBALHEAP_TAG)
 
     /* Check args */
     HDassert(f);
@@ -153,7 +151,7 @@ H5HG_create(H5F_t *f, hid_t dxpl_id, size_t size)
 
     /* Create it */
     H5_CHECK_OVERFLOW(size, size_t, hsize_t);
-    if(HADDR_UNDEF == (addr = H5MF_alloc(f, H5FD_MEM_GHEAP, dxpl_id, (hsize_t)size)))
+    if(HADDR_UNDEF == (addr = H5MF_alloc(f, H5FD_MEM_GHEAP, (hsize_t)size)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, HADDR_UNDEF, "unable to allocate file space for global heap")
     if(NULL == (heap = H5FL_CALLOC(H5HG_heap_t)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "memory allocation failed")
@@ -209,7 +207,7 @@ H5HG_create(H5F_t *f, hid_t dxpl_id, size_t size)
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, HADDR_UNDEF, "unable to add global heap collection to file's CWFS")
 
     /* Add the heap to the cache */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_GHEAP, addr, heap, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_GHEAP, addr, heap, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, HADDR_UNDEF, "unable to cache global heap collection")
 
     ret_value = addr;
@@ -219,7 +217,7 @@ done:
     if(!H5F_addr_defined(ret_value)) {
         if(H5F_addr_defined(addr)) {
             /* Release the space on disk */
-            if(H5MF_xfree(f, H5FD_MEM_GHEAP, dxpl_id, addr, (hsize_t)size) < 0)
+            if(H5MF_xfree(f, H5FD_MEM_GHEAP, addr, (hsize_t)size) < 0)
                 HDONE_ERROR(H5E_BTREE, H5E_CANTFREE, HADDR_UNDEF, "unable to free global heap")
 
             /* Check if the heap object was allocated */
@@ -230,12 +228,12 @@ done:
         } /* end if */
     } /* end if */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, HADDR_UNDEF);
-} /* H5HG_create() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value);
+} /* H5HG__create() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HG_protect
+ * Function:	H5HG__protect
  *
  * Purpose:	Convenience wrapper around H5AC_protect on an indirect block
  *
@@ -247,12 +245,12 @@ done:
  *-------------------------------------------------------------------------
  */
 H5HG_heap_t *
-H5HG_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags)
+H5HG__protect(H5F_t *f, haddr_t addr, unsigned flags)
 {
     H5HG_heap_t *heap;          /* Global heap */
     H5HG_heap_t *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     HDassert(f);
@@ -262,7 +260,7 @@ H5HG_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags)
     HDassert((flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
 
     /* Lock the heap into memory */
-    if(NULL == (heap = (H5HG_heap_t *)H5AC_protect(f, dxpl_id, H5AC_GHEAP, addr, f, flags)))
+    if(NULL == (heap = (H5HG_heap_t *)H5AC_protect(f, H5AC_GHEAP, addr, f, flags)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect global heap")
 
     /* Set the heap's address */
@@ -273,7 +271,7 @@ H5HG_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HG_protect() */
+} /* H5HG__protect() */
 
 
 /*-------------------------------------------------------------------------
@@ -414,20 +412,10 @@ done:
  * Programmer:	Quincey Koziol
  *              Saturday, June 12, 2004
  *
- * Modifications:
- *
- *		John Mainzer, 6/8/05
- *		Modified the function to use the new dirtied parameter of
- *		of H5AC_unprotect() instead of modifying the is_dirty
- *		field of the cache info.
- *
- *		In this case, that required adding the new heap_dirtied_ptr
- *		parameter to the function's argument list.
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HG_extend(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t need)
+H5HG_extend(H5F_t *f, haddr_t addr, size_t need)
 {
     H5HG_heap_t *heap = NULL;       /* Pointer to heap to extend */
     unsigned heap_flags = H5AC__NO_FLAGS_SET;   /* Flags to unprotecting heap */
@@ -444,7 +432,7 @@ H5HG_extend(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t need)
     HDassert(H5F_addr_defined(addr));
 
     /* Protect the heap */
-    if(NULL == (heap = H5HG_protect(f, dxpl_id, addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HG__protect(f, addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect global heap")
 
     /* Re-allocate the heap information in memory */
@@ -487,7 +475,7 @@ H5HG_extend(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t need)
     heap_flags |= H5AC__DIRTIED_FLAG;
 
 done:
-    if(heap && H5AC_unprotect(f, dxpl_id, H5AC_GHEAP, heap->addr, heap, heap_flags) < 0)
+    if(heap && H5AC_unprotect(f, H5AC_GHEAP, heap->addr, heap, heap_flags) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to unprotect heap")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -517,7 +505,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HG_insert(H5F_t *f, hid_t dxpl_id, size_t size, void *obj, H5HG_t *hobj/*out*/)
+H5HG_insert(H5F_t *f, size_t size, void *obj, H5HG_t *hobj/*out*/)
 {
     size_t	need;		/*total space needed for object		*/
     size_t	idx;
@@ -526,7 +514,7 @@ H5HG_insert(H5F_t *f, hid_t dxpl_id, size_t size, void *obj, H5HG_t *hobj/*out*/
     unsigned 	heap_flags = H5AC__NO_FLAGS_SET;
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__GLOBALHEAP_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__GLOBALHEAP_TAG, FAIL)
 
     /* Check args */
     HDassert(f);
@@ -541,7 +529,7 @@ H5HG_insert(H5F_t *f, hid_t dxpl_id, size_t size, void *obj, H5HG_t *hobj/*out*/
 
     /* Look for a heap in the file's CWFS that has enough space for the object */
     addr = HADDR_UNDEF;
-    if(H5F_cwfs_find_free_heap(f, dxpl_id, need, &addr) < 0)
+    if(H5F_cwfs_find_free_heap(f, need, &addr) < 0)
         HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "error trying to locate heap")
 
     /*
@@ -549,14 +537,14 @@ H5HG_insert(H5F_t *f, hid_t dxpl_id, size_t size, void *obj, H5HG_t *hobj/*out*/
      * new collection large enough for the message plus the collection header.
      */
     if(!H5F_addr_defined(addr)) {
-        addr = H5HG_create(f, dxpl_id, need + H5HG_SIZEOF_HDR(f));
+        addr = H5HG__create(f, need + H5HG_SIZEOF_HDR(f));
 
         if(!H5F_addr_defined(addr))
 	    HGOTO_ERROR(H5E_HEAP, H5E_CANTINIT, FAIL, "unable to allocate a global heap collection")
     } /* end if */
     HDassert(H5F_addr_defined(addr));
 
-    if(NULL == (heap = H5HG_protect(f, dxpl_id, addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HG__protect(f, addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect global heap")
 
     /* Split the free space to make room for the new object */
@@ -579,10 +567,10 @@ H5HG_insert(H5F_t *f, hid_t dxpl_id, size_t size, void *obj, H5HG_t *hobj/*out*/
     hobj->idx = idx;
 
 done:
-    if(heap && H5AC_unprotect(f, dxpl_id, H5AC_GHEAP, heap->addr, heap, heap_flags) < 0)
+    if(heap && H5AC_unprotect(f, H5AC_GHEAP, heap->addr, heap, heap_flags) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to unprotect heap.")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5HG_insert() */
 
 
@@ -604,8 +592,7 @@ done:
  *-------------------------------------------------------------------------
  */
 void *
-H5HG_read(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, void *object/*out*/,
-    size_t *buf_size)
+H5HG_read(H5F_t *f, H5HG_t *hobj, void *object/*out*/, size_t *buf_size)
 {
     H5HG_heap_t	*heap = NULL;           /* Pointer to global heap object */
     size_t	size;                   /* Size of the heap object */
@@ -613,14 +600,14 @@ H5HG_read(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, void *object/*out*/,
     void        *orig_object = object;  /* Keep a copy of the original object pointer */
     void	*ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__GLOBALHEAP_TAG, NULL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__GLOBALHEAP_TAG, NULL)
 
     /* Check args */
     HDassert(f);
     HDassert(hobj);
 
     /* Load the heap */
-    if(NULL == (heap = H5HG_protect(f, dxpl_id, hobj->addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HG__protect(f, hobj->addr, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, NULL, "unable to protect global heap")
 
     HDassert(hobj->idx < heap->nused);
@@ -650,13 +637,13 @@ H5HG_read(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, void *object/*out*/,
     ret_value = object;
 
 done:
-    if(heap && H5AC_unprotect(f, dxpl_id, H5AC_GHEAP, hobj->addr, heap, H5AC__NO_FLAGS_SET) < 0)
+    if(heap && H5AC_unprotect(f, H5AC_GHEAP, hobj->addr, heap, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, NULL, "unable to release object header")
 
     if(NULL == ret_value && NULL == orig_object && object)
         H5MM_free(object);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5HG_read() */
 
 
@@ -679,13 +666,13 @@ done:
  *-------------------------------------------------------------------------
  */
 int
-H5HG_link(H5F_t *f, hid_t dxpl_id, const H5HG_t *hobj, int adjust)
+H5HG_link(H5F_t *f, const H5HG_t *hobj, int adjust)
 {
     H5HG_heap_t *heap = NULL;
     unsigned heap_flags = H5AC__NO_FLAGS_SET;
     int ret_value = -1;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__GLOBALHEAP_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__GLOBALHEAP_TAG, FAIL)
 
     /* Check args */
     HDassert(f);
@@ -694,7 +681,7 @@ H5HG_link(H5F_t *f, hid_t dxpl_id, const H5HG_t *hobj, int adjust)
 	HGOTO_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, "no write intent on file")
 
     /* Load the heap */
-    if(NULL == (heap = H5HG_protect(f, dxpl_id, hobj->addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HG__protect(f, hobj->addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect global heap")
 
     if(adjust != 0) {
@@ -712,10 +699,10 @@ H5HG_link(H5F_t *f, hid_t dxpl_id, const H5HG_t *hobj, int adjust)
     ret_value = heap->obj[hobj->idx].nrefs;
 
 done:
-    if(heap && H5AC_unprotect(f, dxpl_id, H5AC_GHEAP, hobj->addr, heap, heap_flags) < 0)
+    if(heap && H5AC_unprotect(f, H5AC_GHEAP, hobj->addr, heap, heap_flags) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5HG_link() */
 
 
@@ -733,12 +720,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HG_get_obj_size(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, size_t *obj_size)
+H5HG_get_obj_size(H5F_t *f, H5HG_t *hobj, size_t *obj_size)
 {
     H5HG_heap_t *heap = NULL;           /* Pointer to global heap object */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__GLOBALHEAP_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__GLOBALHEAP_TAG, FAIL)
 
     /* Check args */
     HDassert(f);
@@ -746,7 +733,7 @@ H5HG_get_obj_size(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, size_t *obj_size)
     HDassert(obj_size);
 
     /* Load the heap */
-    if(NULL == (heap = H5HG_protect(f, dxpl_id, hobj->addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HG__protect(f, hobj->addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect global heap")
 
     HDassert(hobj->idx < heap->nused);
@@ -756,10 +743,10 @@ H5HG_get_obj_size(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, size_t *obj_size)
     *obj_size = heap->obj[hobj->idx].size;
 
 done:
-    if(heap && H5AC_unprotect(f, dxpl_id, H5AC_GHEAP, hobj->addr, heap, H5AC__NO_FLAGS_SET) < 0)
+    if(heap && H5AC_unprotect(f, H5AC_GHEAP, hobj->addr, heap, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5HG_get_obj_size() */
 
 
@@ -773,17 +760,10 @@ done:
  * Programmer:	Robb Matzke
  *              Monday, March 30, 1998
  *
- * Modifications:
- *
- *		John Mainzer - 6/8/05
- *		Modified function to use the dirtied parameter of
- *		H5AC_unprotect() instead of modifying the is_dirty
- *		field of the cache info.
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HG_remove (H5F_t *f, hid_t dxpl_id, H5HG_t *hobj)
+H5HG_remove (H5F_t *f, H5HG_t *hobj)
 {
     H5HG_heap_t *heap = NULL;
     uint8_t     *p = NULL, *obj_start = NULL;
@@ -792,7 +772,7 @@ H5HG_remove (H5F_t *f, hid_t dxpl_id, H5HG_t *hobj)
     unsigned    flags = H5AC__NO_FLAGS_SET;/* Whether the heap gets deleted */
     herr_t      ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__GLOBALHEAP_TAG, FAIL);
+    FUNC_ENTER_NOAPI_TAG(H5AC__GLOBALHEAP_TAG, FAIL)
 
     /* Check args */
     HDassert(f);
@@ -801,7 +781,7 @@ H5HG_remove (H5F_t *f, hid_t dxpl_id, H5HG_t *hobj)
         HGOTO_ERROR(H5E_HEAP, H5E_WRITEERROR, FAIL, "no write intent on file")
 
     /* Load the heap */
-    if(NULL == (heap = H5HG_protect(f, dxpl_id, hobj->addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HG__protect(f, hobj->addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect global heap")
 
     HDassert(hobj->idx < heap->nused);
@@ -851,10 +831,10 @@ H5HG_remove (H5F_t *f, hid_t dxpl_id, H5HG_t *hobj)
     } /* end else */
 
 done:
-    if(heap && H5AC_unprotect(f, dxpl_id, H5AC_GHEAP, hobj->addr, heap, flags) < 0)
+    if(heap && H5AC_unprotect(f, H5AC_GHEAP, hobj->addr, heap, flags) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL);
+    FUNC_LEAVE_NOAPI_TAG(ret_value);
 } /* end H5HG_remove() */
 
 
diff --git a/src/H5HGcache.c b/src/H5HGcache.c
index a83c22b..50b2669 100644
--- a/src/H5HGcache.c
+++ b/src/H5HGcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HGdbg.c b/src/H5HGdbg.c
index 6013de5..a5e5363 100644
--- a/src/H5HGdbg.c
+++ b/src/H5HGdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
@@ -85,8 +83,7 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5HG_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
-	  int fwidth)
+H5HG_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth)
 {
     unsigned		u, nused, maxobj;
     unsigned		j, k;
@@ -103,7 +100,7 @@ H5HG_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(indent >= 0);
     HDassert(fwidth >= 0);
 
-    if(NULL == (h = H5HG_protect(f, dxpl_id, addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (h = H5HG__protect(f, addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_HEAP, H5E_CANTPROTECT, FAIL, "unable to protect global heap collection");
 
     HDfprintf(stream, "%*sGlobal Heap Collection...\n", indent, "");
@@ -171,7 +168,7 @@ H5HG_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
 	}
 
 done:
-    if (h && H5AC_unprotect(f, dxpl_id, H5AC_GHEAP, addr, h, H5AC__NO_FLAGS_SET) < 0)
+    if (h && H5AC_unprotect(f, H5AC_GHEAP, addr, h, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_PROTECT, FAIL, "unable to release object header");
 
     FUNC_LEAVE_NOAPI(ret_value);
diff --git a/src/H5HGmodule.h b/src/H5HGmodule.h
index aa34f29..1c68206 100644
--- a/src/H5HGmodule.h
+++ b/src/H5HGmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5HGpkg.h b/src/H5HGpkg.h
index a5c80ea..a735ba0 100644
--- a/src/H5HGpkg.h
+++ b/src/H5HGpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -140,7 +138,7 @@ struct H5HG_heap_t {
 /* Package Private Prototypes */
 /******************************/
 H5_DLL herr_t H5HG_free(H5HG_heap_t *heap);
-H5_DLL H5HG_heap_t *H5HG_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags);
+H5_DLL H5HG_heap_t *H5HG__protect(H5F_t *f, haddr_t addr, unsigned flags);
 
 #endif /* _H5HGpkg_H */
 
diff --git a/src/H5HGprivate.h b/src/H5HGprivate.h
index 0c0aa69..a7d7a80 100644
--- a/src/H5HGprivate.h
+++ b/src/H5HGprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -56,15 +54,14 @@ typedef struct H5HG_heap_t H5HG_heap_t;
 
 
 /* Main global heap routines */
-H5_DLL herr_t H5HG_insert(H5F_t *f, hid_t dxpl_id, size_t size, void *obj,
-			   H5HG_t *hobj/*out*/);
-H5_DLL void *H5HG_read(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, void *object, size_t *buf_size/*out*/);
-H5_DLL int H5HG_link(H5F_t *f, hid_t dxpl_id, const H5HG_t *hobj, int adjust);
-H5_DLL herr_t H5HG_get_obj_size(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj, size_t *obj_size);
-H5_DLL herr_t H5HG_remove(H5F_t *f, hid_t dxpl_id, H5HG_t *hobj);
+H5_DLL herr_t H5HG_insert(H5F_t *f, size_t size, void *obj, H5HG_t *hobj/*out*/);
+H5_DLL void *H5HG_read(H5F_t *f, H5HG_t *hobj, void *object, size_t *buf_size/*out*/);
+H5_DLL int H5HG_link(H5F_t *f, const H5HG_t *hobj, int adjust);
+H5_DLL herr_t H5HG_get_obj_size(H5F_t *f, H5HG_t *hobj, size_t *obj_size);
+H5_DLL herr_t H5HG_remove(H5F_t *f, H5HG_t *hobj);
 
 /* Support routines */
-H5_DLL herr_t H5HG_extend(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t need);
+H5_DLL herr_t H5HG_extend(H5F_t *f, haddr_t addr, size_t need);
 
 /* Query routines */
 H5_DLL haddr_t H5HG_get_addr(const H5HG_heap_t *h);
@@ -72,7 +69,7 @@ H5_DLL size_t H5HG_get_size(const H5HG_heap_t *h);
 H5_DLL size_t H5HG_get_free_size(const H5HG_heap_t *h);
 
 /* Debugging functions */
-H5_DLL herr_t H5HG_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
+H5_DLL herr_t H5HG_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
 			  int fwidth);
 
 #endif /* _H5HGprivate_H */
diff --git a/src/H5HGpublic.h b/src/H5HGpublic.h
index 01cd60c..fcec593 100644
--- a/src/H5HGpublic.h
+++ b/src/H5HGpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5HGquery.c b/src/H5HGquery.c
index d07edcc..35abc2e 100644
--- a/src/H5HGquery.c
+++ b/src/H5HGquery.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5HL.c b/src/H5HL.c
index 9af1119..735077c 100644
--- a/src/H5HL.c
+++ b/src/H5HL.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -64,7 +62,7 @@
 /********************/
 
 static H5HL_free_t *H5HL__remove_free(H5HL_t *heap, H5HL_free_t *fl);
-static herr_t H5HL__minimize_heap_space(H5F_t *f, hid_t dxpl_id, H5HL_t *heap);
+static herr_t H5HL__minimize_heap_space(H5F_t *f, H5HL_t *heap);
 static herr_t H5HL__dirty(H5HL_t *heap);
 
 
@@ -112,7 +110,7 @@ H5FL_BLK_DEFINE(lheap_chunk);
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, haddr_t *addr_p/*out*/))
+H5HL_create(H5F_t *f, size_t size_hint, haddr_t *addr_p/*out*/))
 
     H5HL_t      *heap = NULL;           /* Heap created                 */
     H5HL_prfx_t *prfx = NULL;           /* Heap prefix                  */
@@ -133,7 +131,7 @@ H5HL_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, haddr_t *addr_p/*out*/))
 
     /* Allocate file space */
     total_size = heap->prfx_size + size_hint;
-    if(HADDR_UNDEF == (heap->prfx_addr = H5MF_alloc(f, H5FD_MEM_LHEAP, dxpl_id, total_size)))
+    if(HADDR_UNDEF == (heap->prfx_addr = H5MF_alloc(f, H5FD_MEM_LHEAP, total_size)))
         H5E_THROW(H5E_CANTALLOC, "unable to allocate file memory");
 
     /* Initialize info */
@@ -163,7 +161,7 @@ H5HL_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, haddr_t *addr_p/*out*/))
         H5E_THROW(H5E_CANTALLOC, "memory allocation failed");
 
     /* Add to cache */
-    if(FAIL == H5AC_insert_entry(f, dxpl_id, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, H5AC__NO_FLAGS_SET))
+    if(FAIL == H5AC_insert_entry(f, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, H5AC__NO_FLAGS_SET))
         H5E_THROW(H5E_CANTINIT, "unable to cache local heap prefix");
 
     /* Set address to return */
@@ -179,7 +177,7 @@ CATCH
         else {
             if(heap) {
                 if(H5F_addr_defined(heap->prfx_addr))
-                    if(FAIL == H5MF_xfree(f, H5FD_MEM_LHEAP, dxpl_id, heap->prfx_addr, total_size))
+                    if(FAIL == H5MF_xfree(f, H5FD_MEM_LHEAP, heap->prfx_addr, total_size))
                         H5E_THROW(H5E_CANTFREE, "can't release heap data?");
                 if(FAIL == H5HL__dest(heap))
                     H5E_THROW(H5E_CANTFREE, "unable to destroy local heap");
@@ -205,7 +203,7 @@ END_FUNC(PRIV) /* end H5HL_create() */
  */
 BEGIN_FUNC(STATIC, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL__minimize_heap_space(H5F_t *f, hid_t dxpl_id, H5HL_t *heap))
+H5HL__minimize_heap_space(H5F_t *f, H5HL_t *heap))
 
     size_t new_heap_size = heap->dblk_size;     /* New size of heap */
 
@@ -299,7 +297,7 @@ H5HL__minimize_heap_space(H5F_t *f, hid_t dxpl_id, H5HL_t *heap))
             H5E_THROW(H5E_CANTALLOC, "memory allocation failed");
 
         /* Reallocate data block in file */
-        if(FAIL == H5HL__dblk_realloc(f, dxpl_id, heap, new_heap_size))
+        if(FAIL == H5HL__dblk_realloc(f, heap, new_heap_size))
             H5E_THROW(H5E_CANTRESIZE, "reallocating data block failed");
     } /* end if */
 
@@ -324,7 +322,7 @@ END_FUNC(STATIC) /* H5HL__minimize_heap_space() */
  */
 BEGIN_FUNC(PRIV, ERR,
 H5HL_t *, NULL, NULL,
-H5HL_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags))
+H5HL_protect(H5F_t *f, haddr_t addr, unsigned flags))
 
     H5HL_cache_prfx_ud_t prfx_udata;                    /* User data for protecting local heap prefix       */
     H5HL_prfx_t *prfx = NULL;                           /* Local heap prefix                                */
@@ -347,7 +345,7 @@ H5HL_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags))
     prfx_udata.sizeof_prfx = H5HL_SIZEOF_HDR(f);
 
     /* Protect the local heap prefix */
-    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, dxpl_id, H5AC_LHEAP_PRFX, addr, &prfx_udata, flags)))
+    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, H5AC_LHEAP_PRFX, addr, &prfx_udata, flags)))
         H5E_THROW(H5E_CANTPROTECT, "unable to load heap prefix");
 
     /* Get the pointer to the heap */
@@ -362,7 +360,7 @@ H5HL_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags))
             prfx_cache_flags |= H5AC__PIN_ENTRY_FLAG;
         else {
             /* Protect the local heap data block */
-            if(NULL == (dblk = (H5HL_dblk_t *)H5AC_protect(f, dxpl_id, H5AC_LHEAP_DBLK, heap->dblk_addr, heap, flags)))
+            if(NULL == (dblk = (H5HL_dblk_t *)H5AC_protect(f, H5AC_LHEAP_DBLK, heap->dblk_addr, heap, flags)))
                 H5E_THROW(H5E_CANTPROTECT, "unable to load heap data block");
 
             /* Set the flag for pinning the data block when unprotecting it */
@@ -378,11 +376,11 @@ H5HL_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags))
 
 CATCH
     /* Release the prefix from the cache, now pinned */
-    if(prfx && heap && H5AC_unprotect(f, dxpl_id, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, prfx_cache_flags) < 0)
+    if(prfx && heap && H5AC_unprotect(f, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, prfx_cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release local heap prefix");
 
     /* Release the data block from the cache, now pinned */
-    if(dblk && heap && H5AC_unprotect(f, dxpl_id, H5AC_LHEAP_DBLK, heap->dblk_addr, dblk, dblk_cache_flags) < 0)
+    if(dblk && heap && H5AC_unprotect(f, H5AC_LHEAP_DBLK, heap->dblk_addr, dblk, dblk_cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release local heap data block");
 
 END_FUNC(PRIV) /* end H5HL_protect() */
@@ -402,18 +400,20 @@ END_FUNC(PRIV) /* end H5HL_protect() */
  *
  *-------------------------------------------------------------------------
  */
-BEGIN_FUNC(PRIV, NOERR,
-void *, NULL, -,
+BEGIN_FUNC(PRIV, ERR,
+void *, NULL, NULL,
 H5HL_offset_into(const H5HL_t *heap, size_t offset))
 
     /* Sanity check */
     HDassert(heap);
-    HDassert(offset < heap->dblk_size);
+    if(offset >= heap->dblk_size)
+       H5E_THROW(H5E_CANTGET, "unable to offset into local heap data block");
 
     ret_value = heap->dblk_image + offset;
 
+CATCH
+    /* No special processing on errors */
 END_FUNC(PRIV) /* end H5HL_offset_into() */
-
 
 /*-------------------------------------------------------------------------
  * Function:    H5HL_unprotect
@@ -547,7 +547,7 @@ END_FUNC(STATIC) /* end H5HL__dirty() */
  */
 BEGIN_FUNC(PRIV, ERR,
 size_t, UFAIL, UFAIL,
-H5HL_insert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t buf_size, const void *buf))
+H5HL_insert(H5F_t *f, H5HL_t *heap, size_t buf_size, const void *buf))
 
     H5HL_free_t     *fl = NULL, *last_fl = NULL;
     size_t          offset = 0;
@@ -635,7 +635,7 @@ H5HL_insert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t buf_size, const void *
         H5_CHECK_OVERFLOW(new_dblk_size, size_t, hsize_t);
 
         /* Extend current heap if possible */
-        was_extended = H5MF_try_extend(f, dxpl_id, H5FD_MEM_LHEAP, heap->dblk_addr, (hsize_t)(heap->dblk_size), (hsize_t)need_more);
+        was_extended = H5MF_try_extend(f, H5FD_MEM_LHEAP, heap->dblk_addr, (hsize_t)(heap->dblk_size), (hsize_t)need_more);
         if(FAIL == was_extended)
             H5E_THROW(H5E_CANTEXTEND, "error trying to extend heap");
 
@@ -658,7 +658,7 @@ H5HL_insert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t buf_size, const void *
         } /* end if */
         else { /* ...if we can't, allocate a new chunk & release the old */
             /* Reallocate data block in file */
-            if(FAIL == H5HL__dblk_realloc(f, dxpl_id, heap, new_dblk_size))
+            if(FAIL == H5HL__dblk_realloc(f, heap, new_dblk_size))
                 H5E_THROW(H5E_CANTRESIZE, "reallocating data block failed");
         } /* end if */
 
@@ -761,7 +761,7 @@ END_FUNC(PRIV) /* H5HL_insert() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL_remove(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t offset, size_t size))
+H5HL_remove(H5F_t *f, H5HL_t *heap, size_t offset, size_t size))
 
     H5HL_free_t *fl = NULL;
 
@@ -809,7 +809,7 @@ H5HL_remove(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t offset, size_t size))
                     fl2 = H5HL__remove_free(heap, fl2);
                     if(((fl->offset + fl->size) == heap->dblk_size) &&
                              ((2 * fl->size) > heap->dblk_size)) {
-                        if(FAIL == H5HL__minimize_heap_space(f, dxpl_id, heap))
+                        if(FAIL == H5HL__minimize_heap_space(f, heap))
                             H5E_THROW(H5E_CANTFREE, "heap size minimization failed");
                     }
                     H5_LEAVE(SUCCEED);
@@ -818,7 +818,7 @@ H5HL_remove(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t offset, size_t size))
             }
             if(((fl->offset + fl->size) == heap->dblk_size) &&
                      ((2 * fl->size) > heap->dblk_size)) {
-                if(FAIL == H5HL__minimize_heap_space(f, dxpl_id, heap))
+                if(FAIL == H5HL__minimize_heap_space(f, heap))
                     H5E_THROW(H5E_CANTFREE, "heap size minimization failed");
             }
             H5_LEAVE(SUCCEED);
@@ -833,7 +833,7 @@ H5HL_remove(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t offset, size_t size))
                     fl2 = H5HL__remove_free(heap, fl2);
                     if(((fl->offset + fl->size) == heap->dblk_size) &&
                         ((2 * fl->size) > heap->dblk_size)) {
-                        if(FAIL == H5HL__minimize_heap_space(f, dxpl_id, heap))
+                        if(FAIL == H5HL__minimize_heap_space(f, heap))
                             H5E_THROW(H5E_CANTFREE, "heap size minimization failed");
                     } /* end if */
                     H5_LEAVE(SUCCEED);
@@ -842,7 +842,7 @@ H5HL_remove(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t offset, size_t size))
             } /* end while */
             if(((fl->offset + fl->size) == heap->dblk_size) &&
                     ((2 * fl->size) > heap->dblk_size)) {
-                if(FAIL == H5HL__minimize_heap_space(f, dxpl_id, heap))
+                if(FAIL == H5HL__minimize_heap_space(f, heap))
                     H5E_THROW(H5E_CANTFREE, "heap size minimization failed");
             } /* end if */
             H5_LEAVE(SUCCEED);
@@ -879,11 +879,9 @@ H5HL_remove(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t offset, size_t size))
         heap->freelist->prev = fl;
     heap->freelist = fl;
 
-    if(((fl->offset + fl->size) == heap->dblk_size) &&
-            ((2 * fl->size) > heap->dblk_size)) {
-        if(FAIL == H5HL__minimize_heap_space(f, dxpl_id, heap))
+    if(((fl->offset + fl->size) == heap->dblk_size) && ((2 * fl->size) > heap->dblk_size))
+        if(FAIL == H5HL__minimize_heap_space(f, heap))
             H5E_THROW(H5E_CANTFREE, "heap size minimization failed");
-    } /* end if */
 
 CATCH
     /* No special processing on exit */
@@ -905,7 +903,7 @@ END_FUNC(PRIV) /* end H5HL_remove() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr))
+H5HL_delete(H5F_t *f, haddr_t addr))
 
     H5HL_t      *heap = NULL;           /* Local heap to delete */
     H5HL_cache_prfx_ud_t prfx_udata;    /* User data for protecting local heap prefix */
@@ -924,7 +922,7 @@ H5HL_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr))
     prfx_udata.sizeof_prfx = H5HL_SIZEOF_HDR(f);
 
     /* Protect the local heap prefix */
-    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, dxpl_id, H5AC_LHEAP_PRFX, addr, &prfx_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, H5AC_LHEAP_PRFX, addr, &prfx_udata, H5AC__NO_FLAGS_SET)))
         H5E_THROW(H5E_CANTPROTECT, "unable to load heap prefix");
 
     /* Get the pointer to the heap */
@@ -933,7 +931,7 @@ H5HL_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr))
     /* Check if heap has separate data block */
     if(!heap->single_cache_obj)
         /* Protect the local heap data block */
-        if(NULL == (dblk = (H5HL_dblk_t *)H5AC_protect(f, dxpl_id, H5AC_LHEAP_DBLK, heap->dblk_addr, heap, H5AC__NO_FLAGS_SET)))
+        if(NULL == (dblk = (H5HL_dblk_t *)H5AC_protect(f, H5AC_LHEAP_DBLK, heap->dblk_addr, heap, H5AC__NO_FLAGS_SET)))
             H5E_THROW(H5E_CANTPROTECT, "unable to load heap data block");
 
     /* Set the flags for releasing the prefix and data block */
@@ -941,11 +939,11 @@ H5HL_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr))
 
 CATCH
     /* Release the data block from the cache, now deleted */
-    if(dblk && heap && H5AC_unprotect(f, dxpl_id, H5AC_LHEAP_DBLK, heap->dblk_addr, dblk, cache_flags) < 0)
+    if(dblk && heap && H5AC_unprotect(f, H5AC_LHEAP_DBLK, heap->dblk_addr, dblk, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release local heap data block");
 
     /* Release the prefix from the cache, now deleted */
-    if(prfx && heap && H5AC_unprotect(f, dxpl_id, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, cache_flags) < 0)
+    if(prfx && heap && H5AC_unprotect(f, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, cache_flags) < 0)
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release local heap prefix");
 
 END_FUNC(PRIV) /* end H5HL_delete() */
@@ -965,7 +963,7 @@ END_FUNC(PRIV) /* end H5HL_delete() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL_get_size(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t *size))
+H5HL_get_size(H5F_t *f, haddr_t addr, size_t *size))
 
     H5HL_cache_prfx_ud_t prfx_udata;    /* User data for protecting local heap prefix */
     H5HL_prfx_t *prfx = NULL;           /* Local heap prefix */
@@ -983,7 +981,7 @@ H5HL_get_size(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t *size))
     prfx_udata.sizeof_prfx = H5HL_SIZEOF_HDR(f);
 
     /* Protect the local heap prefix */
-    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, dxpl_id, H5AC_LHEAP_PRFX, addr, &prfx_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, H5AC_LHEAP_PRFX, addr, &prfx_udata, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to load heap prefix");
 
     /* Get the pointer to the heap */
@@ -993,7 +991,7 @@ H5HL_get_size(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t *size))
     *size = heap->dblk_size;
 
 CATCH
-    if(prfx && FAIL == H5AC_unprotect(f, dxpl_id, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, H5AC__NO_FLAGS_SET))
+    if(prfx && FAIL == H5AC_unprotect(f, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, H5AC__NO_FLAGS_SET))
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release local heap prefix");
 
 END_FUNC(PRIV) /* end H5HL_get_size() */
@@ -1014,7 +1012,7 @@ END_FUNC(PRIV) /* end H5HL_get_size() */
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL_heapsize(H5F_t *f, hid_t dxpl_id, haddr_t addr, hsize_t *heap_size))
+H5HL_heapsize(H5F_t *f, haddr_t addr, hsize_t *heap_size))
 
     H5HL_cache_prfx_ud_t prfx_udata;    /* User data for protecting local heap prefix */
     H5HL_prfx_t *prfx = NULL;           /* Local heap prefix */
@@ -1032,7 +1030,7 @@ H5HL_heapsize(H5F_t *f, hid_t dxpl_id, haddr_t addr, hsize_t *heap_size))
     prfx_udata.sizeof_prfx = H5HL_SIZEOF_HDR(f);
 
     /* Protect the local heap prefix */
-    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, dxpl_id, H5AC_LHEAP_PRFX, addr, &prfx_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (prfx = (H5HL_prfx_t *)H5AC_protect(f, H5AC_LHEAP_PRFX, addr, &prfx_udata, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to load heap prefix");
 
     /* Get the pointer to the heap */
@@ -1042,7 +1040,7 @@ H5HL_heapsize(H5F_t *f, hid_t dxpl_id, haddr_t addr, hsize_t *heap_size))
     *heap_size += (hsize_t)(heap->prfx_size + heap->dblk_size);
 
 CATCH
-    if(prfx && FAIL == H5AC_unprotect(f, dxpl_id, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, H5AC__NO_FLAGS_SET))
+    if(prfx && FAIL == H5AC_unprotect(f, H5AC_LHEAP_PRFX, heap->prfx_addr, prfx, H5AC__NO_FLAGS_SET))
         H5E_THROW(H5E_CANTUNPROTECT, "unable to release local heap prefix");
 
 END_FUNC(PRIV) /* end H5HL_heapsize() */
diff --git a/src/H5HLcache.c b/src/H5HLcache.c
index 3668d81..926f787 100644
--- a/src/H5HLcache.c
+++ b/src/H5HLcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HLdbg.c b/src/H5HLdbg.c
index fc8f5d3..e4e6fa8 100644
--- a/src/H5HLdbg.c
+++ b/src/H5HLdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@hdfgroup.org>
@@ -49,7 +47,7 @@
  */
 BEGIN_FUNC(PRIV, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent, int fwidth))
+H5HL_debug(H5F_t *f, haddr_t addr, FILE * stream, int indent, int fwidth))
 
     H5HL_t		*h = NULL;
     int			free_block;
@@ -64,7 +62,7 @@ H5HL_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent, int
     HDassert(indent >= 0);
     HDassert(fwidth >= 0);
 
-    if(NULL == (h = (H5HL_t *)H5HL_protect(f, dxpl_id, addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (h = (H5HL_t *)H5HL_protect(f, addr, H5AC__READ_ONLY_FLAG)))
         H5E_THROW(H5E_CANTPROTECT, "unable to load/protect local heap");
 
     HDfprintf(stream, "%*sLocal Heap...\n", indent, "");
diff --git a/src/H5HLdblk.c b/src/H5HLdblk.c
index f90562b..762a213 100644
--- a/src/H5HLdblk.c
+++ b/src/H5HLdblk.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -180,7 +178,7 @@ END_FUNC(PKG) /* end H5HL__dblk_dest() */
  */
 BEGIN_FUNC(PKG, ERR,
 herr_t, SUCCEED, FAIL,
-H5HL__dblk_realloc(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t new_heap_size))
+H5HL__dblk_realloc(H5F_t *f, H5HL_t *heap, size_t new_heap_size))
 
     H5HL_dblk_t *dblk;                  /* Local heap data block */
     haddr_t old_addr;                   /* Old location of heap data block */
@@ -195,12 +193,12 @@ H5HL__dblk_realloc(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t new_heap_size))
     old_addr = heap->dblk_addr;
     old_heap_size = heap->dblk_size;
     H5_CHECK_OVERFLOW(old_heap_size, size_t, hsize_t);
-    if(FAIL == H5MF_xfree(f, H5FD_MEM_LHEAP, dxpl_id, old_addr, (hsize_t)old_heap_size))
+    if(FAIL == H5MF_xfree(f, H5FD_MEM_LHEAP, old_addr, (hsize_t)old_heap_size))
         H5E_THROW(H5E_CANTFREE, "can't free old local heap data");
 
     /* Allocate new space on disk */
     H5_CHECK_OVERFLOW(new_heap_size, size_t, hsize_t);
-    if(HADDR_UNDEF == (new_addr = H5MF_alloc(f, H5FD_MEM_LHEAP, dxpl_id, (hsize_t)new_heap_size)))
+    if(HADDR_UNDEF == (new_addr = H5MF_alloc(f, H5FD_MEM_LHEAP, (hsize_t)new_heap_size)))
         H5E_THROW(H5E_CANTALLOC, "unable to allocate file space for local heap");
 
     /* Update heap info*/
@@ -242,7 +240,7 @@ H5HL__dblk_realloc(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t new_heap_size))
                 H5E_THROW(H5E_CANTRESIZE, "unable to resize heap prefix in cache");
 
             /* Insert data block into cache (pinned) */
-            if(FAIL == H5AC_insert_entry(f, dxpl_id, H5AC_LHEAP_DBLK, new_addr, dblk, H5AC__PIN_ENTRY_FLAG))
+            if(FAIL == H5AC_insert_entry(f, H5AC_LHEAP_DBLK, new_addr, dblk, H5AC__PIN_ENTRY_FLAG))
                 H5E_THROW(H5E_CANTINIT, "unable to cache local heap data block");
                 
             dblk = NULL;
@@ -259,7 +257,7 @@ H5HL__dblk_realloc(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t new_heap_size))
                 H5E_THROW(H5E_CANTRESIZE, "unable to resize heap data block in cache");
 
             /* Relocate the heap data block in the cache */
-            if(FAIL == H5AC_move_entry(f, H5AC_LHEAP_DBLK, old_addr, new_addr, dxpl_id))
+            if(FAIL == H5AC_move_entry(f, H5AC_LHEAP_DBLK, old_addr, new_addr))
                 H5E_THROW(H5E_CANTMOVE, "unable to move heap data block in cache");
 
         } /* end else */
diff --git a/src/H5HLint.c b/src/H5HLint.c
index 5b547cf..e625f3d 100644
--- a/src/H5HLint.c
+++ b/src/H5HLint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HLmodule.h b/src/H5HLmodule.h
index b38c077..b0fd750 100644
--- a/src/H5HLmodule.h
+++ b/src/H5HLmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5HLpkg.h b/src/H5HLpkg.h
index 06db696..44a2cfb 100644
--- a/src/H5HLpkg.h
+++ b/src/H5HLpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -149,6 +147,6 @@ H5_DLL herr_t H5HL__prfx_dest(H5HL_prfx_t *prfx);
 /* Heap data block routines */
 H5_DLL H5HL_dblk_t *H5HL__dblk_new(H5HL_t *heap);
 H5_DLL herr_t H5HL__dblk_dest(H5HL_dblk_t *dblk);
-H5_DLL herr_t H5HL__dblk_realloc(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t new_heap_size);
+H5_DLL herr_t H5HL__dblk_realloc(H5F_t *f, H5HL_t *heap, size_t new_heap_size);
 
 #endif /* _H5HLpkg_H */
diff --git a/src/H5HLprfx.c b/src/H5HLprfx.c
index ed1c4db..41c254a 100644
--- a/src/H5HLprfx.c
+++ b/src/H5HLprfx.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HLprivate.h b/src/H5HLprivate.h
index e2bf29c..4001ef1 100644
--- a/src/H5HLprivate.h
+++ b/src/H5HLprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -58,20 +56,18 @@ typedef struct H5HL_t H5HL_t;
 /*
  * Library prototypes
  */
-H5_DLL herr_t H5HL_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, haddr_t *addr/*out*/);
-H5_DLL herr_t H5HL_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr);
-H5_DLL herr_t H5HL_get_size(H5F_t *f, hid_t dxpl_id, haddr_t addr, size_t *size);
-H5_DLL herr_t H5HL_heapsize(H5F_t *f, hid_t dxpl_id, haddr_t addr, hsize_t *heap_size);
-H5_DLL size_t H5HL_insert(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t size,
-    const void *buf);
+H5_DLL herr_t H5HL_create(H5F_t *f, size_t size_hint, haddr_t *addr/*out*/);
+H5_DLL herr_t H5HL_delete(H5F_t *f, haddr_t addr);
+H5_DLL herr_t H5HL_get_size(H5F_t *f, haddr_t addr, size_t *size);
+H5_DLL herr_t H5HL_heapsize(H5F_t *f, haddr_t addr, hsize_t *heap_size);
+H5_DLL size_t H5HL_insert(H5F_t *f, H5HL_t *heap, size_t size, const void *buf);
 H5_DLL void *H5HL_offset_into(const H5HL_t *heap, size_t offset);
-H5_DLL H5HL_t *H5HL_protect(H5F_t *f, hid_t dxpl_id, haddr_t addr, unsigned flags);
-H5_DLL herr_t H5HL_remove(H5F_t *f, hid_t dxpl_id, H5HL_t *heap, size_t offset,
-    size_t size);
+H5_DLL H5HL_t *H5HL_protect(H5F_t *f, haddr_t addr, unsigned flags);
+H5_DLL herr_t H5HL_remove(H5F_t *f, H5HL_t *heap, size_t offset, size_t size);
 H5_DLL herr_t H5HL_unprotect(H5HL_t *heap);
 
 /* Debugging routines for dumping file structures */
-H5_DLL herr_t H5HL_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
+H5_DLL herr_t H5HL_debug(H5F_t *f, haddr_t addr, FILE * stream, int indent,
     int fwidth);
 
 #endif
diff --git a/src/H5HLpublic.h b/src/H5HLpublic.h
index 6dc1828..143bb78 100644
--- a/src/H5HLpublic.h
+++ b/src/H5HLpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5HP.c b/src/H5HP.c
index 78e9e5b..4ef5662 100644
--- a/src/H5HP.c
+++ b/src/H5HP.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5HPprivate.h b/src/H5HPprivate.h
index 8db5b21..041c2b9 100644
--- a/src/H5HPprivate.h
+++ b/src/H5HPprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5I.c b/src/H5I.c
index cbca879..5117394 100644
--- a/src/H5I.c
+++ b/src/H5I.c
@@ -5,57 +5,48 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
- * FILE:	H5I.c - Internal storage routines for handling "IDs"
+ * FILE:    H5I.c - Internal storage routines for handling "IDs"
  *
- * REMARKS:	ID's which allow objects (void *'s currently) to be bundled
- *		into "types" for more general storage.
+ * REMARKS: IDs which allow objects (void * currently) to be bundled
+ *          into "types" for more general storage.
  *
- * DESIGN:	The types are stored in an array of pointers to store each
- *		type in an element. Each "type" node contains a link to a
- *		hash table to manage the IDs in each type.  Allowed types are
- *		values within the range 1 to H5I_MAX_NUM_TYPES and are given out
- *		at run-time.  Types used by the library are stored in global
- *		variables defined in H5Ipublic.h.
- *
- * AUTHOR:	Quincey Koziol
- *
- * MODIFICATIONS:
- *	1/3/96	- Starting writing specs & coding prototype
- *	1/7/96	- Finished coding prototype
- *	6/10/97 - Moved into HDF5 library
- *	5/18/04 - Expanded to allow registration of new types at run-time
+ * DESIGN:  The types are stored in an array of pointers to store each
+ *          type in an element. Each "type" node contains a link to a
+ *          hash table to manage the IDs in each type.  Allowed types are
+ *          values within the range 1 to H5I_MAX_NUM_TYPES and are given out
+ *          at run-time.  Types used by the library are stored in global
+ *          variables defined in H5Ipublic.h.
  */
 
 #include "H5Imodule.h"          /* This source code file is part of the H5I module */
 
 
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5FLprivate.h"	/* Free Lists                           */
-#include "H5Ipkg.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Oprivate.h"		/* Object headers		  	*/
-#include "H5SLprivate.h"	/* Skip Lists                           */
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5ACprivate.h"        /* Metadata cache                           */
+#include "H5CXprivate.h"        /* API Contexts                             */
+#include "H5Eprivate.h"		/* Error handling                           */
+#include "H5FLprivate.h"	/* Free Lists                               */
+#include "H5Ipkg.h"             /* IDs                                      */
+#include "H5MMprivate.h"        /* Memory management                        */
+#include "H5Oprivate.h"         /* Object headers                           */
+#include "H5SLprivate.h"        /* Skip Lists                               */
 
 /* Define this to compile in support for dumping ID information */
 /* #define H5I_DEBUG_OUTPUT */
 #ifndef H5I_DEBUG_OUTPUT
-#include "H5Gprivate.h"		/* Groups				*/
+#include "H5Gprivate.h"         /* Groups                                   */
 #else /* H5I_DEBUG_OUTPUT */
-#define H5G_FRIEND		/*suppress error about including H5Gpkg	  */
-#include "H5Gpkg.h"		/* Groups		  		*/
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Tprivate.h"		/* Datatypes				*/
+#define H5G_FRIEND              /* Suppress error about including H5Gpkg    */
+#include "H5Gpkg.h"             /* Groups                                   */
+#include "H5Dprivate.h"         /* Datasets                                 */
+#include "H5Tprivate.h"         /* Datatypes                                */
 #endif /* H5I_DEBUG_OUTPUT */
 
 /* Local Macros */
@@ -136,6 +127,7 @@ static void *H5I__remove_common(H5I_id_type_t *type_ptr, hid_t id);
 static int H5I__inc_type_ref(H5I_type_t type);
 static int H5I__get_type_ref(H5I_type_t type);
 static H5I_id_info_t *H5I__find_id(hid_t id);
+static ssize_t H5I__get_name(const H5G_loc_t *loc, char *name, size_t size);
 #ifdef H5I_DEBUG_OUTPUT
 static herr_t H5I__debug(H5I_type_t type);
 #endif /* H5I_DEBUG_OUTPUT */
@@ -196,23 +188,19 @@ H5I_term_package(void)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iregister_type
+ * Function:    H5Iregister_type
  *
- * Purpose:	Public interface to H5I_register_type.  Creates a new type
- *		of ID's to give out.  A specific number (RESERVED) of type
- *		entries may be reserved to enable "constant" values to be handed
- *		out which are valid IDs in the type, but which do not map to any
- *		data structures and are not allocated dynamically later. HASH_SIZE is
- *		the minimum hash table size to use for the type. FREE_FUNC is
- *		called with an object pointer when the object is removed from
- *		the type.
+ * Purpose:     Public interface to H5I_register_type.  Creates a new type
+ *              of ID's to give out.  A specific number (RESERVED) of type
+ *              entries may be reserved to enable "constant" values to be handed
+ *              out which are valid IDs in the type, but which do not map to any
+ *              data structures and are not allocated dynamically later. HASH_SIZE is
+ *              the minimum hash table size to use for the type. FREE_FUNC is
+ *              called with an object pointer when the object is removed from
+ *              the type.
  *
- * Return:	Success:	Type ID of the new type
- *		Failure:	H5I_BADID
- *
- * Programmers:	Nathaniel Furrer
- *		James Laird
- *		Friday, April 30, 2004
+ * Return:      Success:    Type ID of the new type
+ *              Failure:    H5I_BADID
  *
  *-------------------------------------------------------------------------
  */
@@ -280,18 +268,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I_register_type
+ * Function:    H5I_register_type
  *
- * Purpose:	Creates a new type of ID's to give out.
- *		The class is initialized or its reference count is incremented
+ * Purpose:     Creates a new type of ID's to give out.
+ *              The class is initialized or its reference count is incremented
  *              (if it is already initialized).
  *
- * Return:	Success:	Type ID of the new type
- *		Failure:	H5I_BADID
- *
- * Programmers:	Nathaniel Furrer
- *		James Laird
- *		Friday, April 30, 2004
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
@@ -345,17 +328,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Itype_exists
+ * Function:    H5Itype_exists
  *
  * Purpose:     Query function to inform the user if a given type is
  *              currently registered with the library.
  *
- * Return:	Success:        1 if the type is registered, 0 if it is not
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *		Nathaniel Furrer
- *              Tuesday, June 29, 2004
+ * Return:      Success:    1 if the type is registered, 0 if it is not
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -367,10 +346,10 @@ H5Itype_exists(H5I_type_t type)
     FUNC_ENTER_API(FAIL)
     H5TRACE1("t", "It", type);
 
-    if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
+    if (type <= H5I_BADID || type >= H5I_next_type)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
 
-    if(NULL == H5I_id_type_list_g[type])
+    if (NULL == H5I_id_type_list_g[type])
         ret_value = FALSE;
 
 done:
@@ -411,9 +390,9 @@ H5Inmembers(H5I_type_t type, hsize_t *num_members)
      * an error when the supplied type does not exist.
      */
     if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
     if(NULL == H5I_id_type_list_g[type])
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "supplied type does not exist")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "supplied type does not exist")
 
     if(num_members) {
         int64_t members;
@@ -453,9 +432,9 @@ H5I_nmembers(H5I_type_t type)
     FUNC_ENTER_NOAPI(FAIL)
 
     if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
     if(NULL == (type_ptr = H5I_id_type_list_g[type]) || type_ptr->init_count <= 0)
-	HGOTO_DONE(0);
+        HGOTO_DONE(0);
 
     /* Set return value */
     H5_CHECKED_ASSIGN(ret_value, int64_t, type_ptr->id_count, uint64_t);
@@ -695,15 +674,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iregister
+ * Function:    H5Iregister
  *
- * Purpose:	Public interface to H5I_register.
+ * Purpose:     Public interface to H5I_register.
  *
- * Return:	Success:	New object id.
- *		Failure:	Negative
- *
- * Programmer:	Nathaniel Furrer
- *		James Laird
+ * Return:      Success:    New object id.
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -726,58 +702,54 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I_register
+ * Function:    H5I_register
  *
- * Purpose:	Registers an OBJECT in a TYPE and returns an ID for it.
- *		This routine does _not_ check for unique-ness of the objects,
- *		if you register an object twice, you will get two different
- *		IDs for it.  This routine does make certain that each ID in a
- *		type is unique.  IDs are created by getting a unique number
- *		for the type the ID is in and incorporating the type into
- *		the ID which is returned to the user.
+ * Purpose:     Registers an OBJECT in a TYPE and returns an ID for it.
+ *              This routine does _not_ check for unique-ness of the objects,
+ *              if you register an object twice, you will get two different
+ *              IDs for it.  This routine does make certain that each ID in a
+ *              type is unique.  IDs are created by getting a unique number
+ *              for the type the ID is in and incorporating the type into
+ *              the ID which is returned to the user.
  *
- * Return:	Success:	New object id.
- *		Failure:	Negative
- *
- * Programmer:	Unknown
+ * Return:      Success:    New object id
+ *              Failure:    H5I_INVALID_HID
  *
  *-------------------------------------------------------------------------
  */
 hid_t
 H5I_register(H5I_type_t type, const void *object, hbool_t app_ref)
 {
-    H5I_id_type_t	*type_ptr;	/*ptr to the type		*/
-    H5I_id_info_t	*id_ptr;	/*ptr to the new ID information */
-    hid_t		new_id;		/*new ID			*/
-    hid_t		ret_value = SUCCEED; /*return value		*/
+    H5I_id_type_t   *type_ptr = NULL;       /* ptr to the type                  */
+    H5I_id_info_t   *id_ptr = NULL;         /* ptr to the new ID information    */
+    hid_t           new_id = -1;            /* new ID                           */
+    hid_t           ret_value = H5I_INVALID_HID;    /* return value             */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Check arguments */
-    if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
+    if (type <= H5I_BADID || type >= H5I_next_type)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, H5I_INVALID_HID, "invalid type number")
     type_ptr = H5I_id_type_list_g[type];
-    if(NULL == type_ptr || type_ptr->init_count <= 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "invalid type")
-    if(NULL == (id_ptr = H5FL_MALLOC(H5I_id_info_t)))
-        HGOTO_ERROR(H5E_ATOM, H5E_NOSPACE, FAIL, "memory allocation failed")
+    if ((NULL == type_ptr) || (type_ptr->init_count <= 0))
+        HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, H5I_INVALID_HID, "invalid type")
+    if (NULL == (id_ptr = H5FL_MALLOC(H5I_id_info_t)))
+        HGOTO_ERROR(H5E_ATOM, H5E_NOSPACE, H5I_INVALID_HID, "memory allocation failed")
 
-    /* Create the struct & it's ID */
+    /* Create the struct & its ID */
     new_id = H5I_MAKE(type, type_ptr->nextid);
     id_ptr->id = new_id;
-    id_ptr->count = 1; /*initial reference count*/
+    id_ptr->count = 1; /* initial reference count */
     id_ptr->app_count = !!app_ref;
     id_ptr->obj_ptr = object;
 
     /* Insert into the type */
-    if(H5SL_insert(type_ptr->ids, id_ptr, &id_ptr->id) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTINSERT, FAIL, "can't insert ID node into skip list")
+    if (H5SL_insert(type_ptr->ids, id_ptr, &id_ptr->id) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTINSERT, H5I_INVALID_HID, "can't insert ID node into skip list")
     type_ptr->id_count++;
     type_ptr->nextid++;
 
-    /*
-     * Sanity check for the 'nextid' getting too large and wrapping around.
-     */
+    /* Sanity check for the 'nextid' getting too large and wrapping around */
     HDassert(type_ptr->nextid <= ID_MASK);
 
     /* Set return value */
@@ -791,27 +763,23 @@ done:
 /*-------------------------------------------------------------------------
  * Function:    H5I_register_with_id
  *
- * Purpose:	Registers an OBJECT in a TYPE with the supplied ID for it.
- *          This routine will check to ensure the supplied ID is not already
- *          in use, and ensure that it is a valid ID for the given type, 
- *          but will NOT check to ensure the OBJECT is not already
- *          registered (thus, it is possible to register one object under
- *          multiple IDs).
+ * Purpose:     Registers an OBJECT in a TYPE with the supplied ID for it.
+ *              This routine will check to ensure the supplied ID is not already
+ *              in use, and ensure that it is a valid ID for the given type, 
+ *              but will NOT check to ensure the OBJECT is not already
+ *              registered (thus, it is possible to register one object under
+ *              multiple IDs).
  *
- * Return:  Success:    0
- *          Failure:    -1
- *
- * Programmer: Mike McGreevy
- *             Wednesday, July 21, 2010
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5I_register_with_id(H5I_type_t type, const void *object, hbool_t app_ref, hid_t id)
 {
-    H5I_id_type_t	*type_ptr;	/*ptr to the type		*/
-    H5I_id_info_t	*id_ptr;	/*ptr to the new ID information */
-    herr_t		ret_value = SUCCEED; /*return value		*/
+    H5I_id_type_t   *type_ptr;              /* ptr to the type                  */
+    H5I_id_info_t   *id_ptr;                /* ptr to the new ID information    */
+    herr_t          ret_value = SUCCEED;    /* return value                     */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -1201,10 +1169,10 @@ H5I_remove(hid_t id)
     /* Check arguments */
     type = H5I_TYPE(id);
     if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "invalid type number")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "invalid type number")
     type_ptr = H5I_id_type_list_g[type];
     if(type_ptr == NULL || type_ptr->init_count <= 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, NULL, "invalid type")
+        HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, NULL, "invalid type")
 
     /* Remove the node from the type */
     if(NULL == (ret_value = H5I__remove_common(type_ptr, id)))
@@ -1240,7 +1208,7 @@ H5Idec_ref(hid_t id)
 
     /* Check arguments */
     if(id < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID")
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID")
 
     /* Do actual decrement operation */
     if((ret_value = H5I_dec_app_ref(id)) < 0)
@@ -1373,16 +1341,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I_dec_app_ref_always_close
+ * Function:    H5I_dec_app_ref_always_close
  *
- * Purpose:	H5I_dec_app_ref wrapper for case of always closing the ID,
- *		even when the free routine fails
+ * Purpose:     H5I_dec_app_ref wrapper for case of always closing the ID,
+ *              even when the free routine fails
  *
- * Return:	Success:	New app. reference count.
- *		Failure:	Negative
- *
- * Programmer:  Quincey Koziol
- *              Sept 16, 2010
+ * Return:      Success:    New app. reference count.
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1400,7 +1365,7 @@ H5I_dec_app_ref_always_close(hid_t id)
     ret_value = H5I_dec_app_ref(id);
 
     /* Check for failure */
-    if(ret_value < 0) {
+    if (ret_value < 0) {
         /*
          * If an object is closing, we can remove the ID even though the free 
          * method might fail.  This can happen when a mandatory filter fails to
@@ -1410,7 +1375,7 @@ H5I_dec_app_ref_always_close(hid_t id)
         H5I_remove(id);
 
         HGOTO_ERROR(H5E_ATOM, H5E_CANTDEC, FAIL, "can't decrement ID ref count")
-    } /* end if */
+    }
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1418,15 +1383,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iinc_ref
+ * Function:    H5Iinc_ref
  *
- * Purpose:	Increments the number of references outstanding for an ID.
+ * Purpose:     Increments the number of references outstanding for an ID.
  *
- * Return:	Success:	New reference count
- *		Failure:	Negative
- *
- * Programmer:  Quincey Koziol
- *              Dec  7, 2003
+ * Return:      Success:    New reference count
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1439,11 +1401,11 @@ H5Iinc_ref(hid_t id)
     H5TRACE1("Is", "i", id);
 
     /* Check arguments */
-    if(id < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID")
+    if (id < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID")
 
     /* Do actual increment operation */
-    if((ret_value = H5I_inc_ref(id, TRUE)) < 0)
+    if ((ret_value = H5I_inc_ref(id, TRUE)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTINC, FAIL, "can't increment ID ref count")
 
 done:
@@ -1452,15 +1414,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I_inc_ref
+ * Function:    H5I_inc_ref
  *
- * Purpose:	Increment the reference count for an object.
+ * Purpose:     Increment the reference count for an object.
  *
- * Return:	Success:	The new reference count.
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *              Thursday, July 29, 1999
+ * Return:      Success:    The new reference count.
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1476,8 +1435,8 @@ H5I_inc_ref(hid_t id, hbool_t app_ref)
     HDassert(id >= 0);
 
     /* General lookup of the ID */
-    if(NULL == (id_ptr = H5I__find_id(id)))
-	HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't locate ID")
+    if (NULL == (id_ptr = H5I__find_id(id)))
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't locate ID")
 
     /* Adjust reference counts */
     ++(id_ptr->count);
@@ -1493,15 +1452,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iget_ref
+ * Function:    H5Iget_ref
  *
- * Purpose:	Retrieves the number of references outstanding for an ID.
+ * Purpose:     Retrieves the number of references outstanding for an ID.
  *
- * Return:	Success:	Reference count
- *		Failure:	Negative
- *
- * Programmer:  Quincey Koziol
- *              Dec  7, 2003
+ * Return:      Success:    Reference count
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1514,11 +1470,11 @@ H5Iget_ref(hid_t id)
     H5TRACE1("Is", "i", id);
 
     /* Check arguments */
-    if(id < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID")
+    if (id < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID")
 
     /* Do actual retrieve operation */
-    if((ret_value = H5I_get_ref(id, TRUE)) < 0)
+    if ((ret_value = H5I_get_ref(id, TRUE)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't get ID ref count")
 
 done:
@@ -1527,15 +1483,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I_get_ref
+ * Function:    H5I_get_ref
  *
- * Purpose:	Retrieve the reference count for an object.
+ * Purpose:     Retrieve the reference count for an object.
  *
- * Return:	Success:	The reference count.
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              Saturday, Decemeber  6, 2003
+ * Return:      Success:    The reference count.
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1551,8 +1504,8 @@ H5I_get_ref(hid_t id, hbool_t app_ref)
     HDassert(id >= 0);
 
     /* General lookup of the ID */
-    if(NULL == (id_ptr = H5I__find_id(id)))
-	HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't locate ID")
+    if (NULL == (id_ptr = H5I__find_id(id)))
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't locate ID")
 
     /* Set return value */
     ret_value = (int)(app_ref ? id_ptr->app_count : id_ptr->count);
@@ -1563,16 +1516,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iinc_type_ref
+ * Function:    H5Iinc_type_ref
  *
- * Purpose:	Increments the number of references outstanding for an ID type.
+ * Purpose:     Increments the number of references outstanding for an ID type.
  *
- * Return:	Success:	New reference count
- *		Failure:	Negative
- *
- * Programmer:  Nat Furrer
- *		James Laird
- *              April 30, 2004
+ * Return:      Success:    New reference count
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1585,14 +1534,14 @@ H5Iinc_type_ref(H5I_type_t type)
     H5TRACE1("Is", "It", type);
 
     /* Check arguments */
-    if(type <= 0 || type >= H5I_next_type)
+    if (type <= 0 || type >= H5I_next_type)
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID type")
 
-    if(H5I_IS_LIB_TYPE(type))
+    if (H5I_IS_LIB_TYPE(type))
         HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "cannot call public function on library type")
 
     /* Do actual increment operation */
-    if((ret_value = H5I__inc_type_ref(type)) < 0)
+    if ((ret_value = H5I__inc_type_ref(type)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTINC, FAIL, "can't increment ID type ref count")
 
 done:
@@ -1601,16 +1550,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I__inc_type_ref
- *
- * Purpose:	Increment the reference count for an ID type.
+ * Function:    H5I__inc_type_ref
  *
- * Return:	Success:	The new reference count.
- *		Failure:	Negative
+ * Purpose:     Increment the reference count for an ID type.
  *
- * Programmer:	James Laird
- *		Nat Furrer
- *              Friday, April 30, 2004
+ * Return:      Success:    The new reference count
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1627,8 +1572,8 @@ H5I__inc_type_ref(H5I_type_t type)
 
     /* Check arguments */
     type_ptr = H5I_id_type_list_g[type];
-    if(!type_ptr)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "invalid type")
+    if (!type_ptr)
+        HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "invalid type")
 
     /* Set return value */
     ret_value = (int)(++(type_ptr->init_count));
@@ -1639,24 +1584,26 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Idec_type_ref
- *
- * Purpose:	Decrements the reference count on an entire type of IDs.
- *		If the type reference count becomes zero then the type is
- *		destroyed along with all atoms in that type regardless of
- *		their reference counts.	 Destroying IDs involves calling
- *		the free-func for each ID's object and then adding the ID
- *		struct to the ID free list.  Public interface to
- *		H5I_dec_type_ref.
- *		Returns the number of references to the type on success; a
- *		return value of 0 means that the type will have to be
- *		re-initialized before it can be used again (and should probably
- *		be set to H5I_UNINIT).
- *
- * Return:	Number of references to type on success/Negative on failure
- *
- * Programmer:	Nathaniel Furrer
- *		James Laird
+ * Function:    H5Idec_type_ref
+ *
+ * Purpose:     Decrements the reference count on an entire type of IDs.
+ *              If the type reference count becomes zero then the type is
+ *              destroyed along with all atoms in that type regardless of
+ *              their reference counts.	 Destroying IDs involves calling
+ *              the free-func for each ID's object and then adding the ID
+ *              struct to the ID free list.  Public interface to
+ *              H5I_dec_type_ref.
+ *              Returns the number of references to the type on success; a
+ *              return value of 0 means that the type will have to be
+ *              re-initialized before it can be used again (and should probably
+ *              be set to H5I_UNINIT).
+ *
+ * NOTE:        Using an error type to also represent a count is semantially
+ *              incorrect. We should consider fixing this in a future major
+ *              release (DER).
+ *
+ * Return:      Success:    Number of references to type
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1668,7 +1615,7 @@ H5Idec_type_ref(H5I_type_t type)
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "It", type);
 
-    if(H5I_IS_LIB_TYPE(type))
+    if (H5I_IS_LIB_TYPE(type))
         HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "cannot call public function on library type")
 
     ret_value = H5I_dec_type_ref(type);
@@ -1679,22 +1626,21 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I_dec_type_ref
- *
- * Purpose:	Decrements the reference count on an entire type of IDs.
- *		If the type reference count becomes zero then the type is
- *		destroyed along with all atoms in that type regardless of
- *		their reference counts.	 Destroying IDs involves calling
- *		the free-func for each ID's object and then adding the ID
- *		struct to the ID free list.
- *		Returns the number of references to the type on success; a
- *		return value of 0 means that the type will have to be
- *		re-initialized before it can be used again (and should probably
- *		be set to H5I_UNINIT).
- *
- * Return:	Number of references to type on success/Negative on failure
- *
- * Programmer:	Unknown
+ * Function:    H5I_dec_type_ref
+ *
+ * Purpose:     Decrements the reference count on an entire type of IDs.
+ *              If the type reference count becomes zero then the type is
+ *              destroyed along with all atoms in that type regardless of
+ *              their reference counts.	 Destroying IDs involves calling
+ *              the free-func for each ID's object and then adding the ID
+ *              struct to the ID free list.
+ *              Returns the number of references to the type on success; a
+ *              return value of 0 means that the type will have to be
+ *              re-initialized before it can be used again (and should probably
+ *              be set to H5I_UNINIT).
+ *
+ * Return:      Success:    Number of references to type
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1706,27 +1652,26 @@ H5I_dec_type_ref(H5I_type_t type)
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
+    if (type <= H5I_BADID || type >= H5I_next_type)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
 
     type_ptr = H5I_id_type_list_g[type];
-    if(type_ptr == NULL || type_ptr->init_count <= 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "invalid type")
+    if (type_ptr == NULL || type_ptr->init_count <= 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "invalid type")
 
-    /*
-     * Decrement the number of users of the atomic type.  If this is the
+    /* Decrement the number of users of the atomic type.  If this is the
      * last user of the type then release all atoms from the type and
      * free all memory it used.  The free function is invoked for each atom
      * being freed.
      */
-    if(1 == type_ptr->init_count) {
+    if (1 == type_ptr->init_count) {
         H5I__destroy_type(type);
         ret_value = 0;
-    } /* end if */
+    }
     else {
         --(type_ptr->init_count);
         ret_value = (herr_t)type_ptr->init_count;
-    } /* end else */
+    }
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1734,16 +1679,12 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iget_type_ref
+ * Function:    H5Iget_type_ref
  *
- * Purpose:	Retrieves the number of references outstanding for a type.
+ * Purpose:     Retrieves the number of references outstanding for a type.
  *
- * Return:	Success:	Reference count
- *		Failure:	Negative
- *
- * Programmer:  Nat Furrer
- *		James Laird
- *              April 30, 2004
+ * Return:      Success:    Reference count
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1756,14 +1697,14 @@ H5Iget_type_ref(H5I_type_t type)
     H5TRACE1("Is", "It", type);
 
     /* Check arguments */
-    if(type <= 0 || type >= H5I_next_type)
+    if (type <= 0 || type >= H5I_next_type)
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID type")
 
-    if(H5I_IS_LIB_TYPE(type))
+    if (H5I_IS_LIB_TYPE(type))
         HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "cannot call public function on library type")
 
     /* Do actual retrieve operation */
-    if((ret_value = H5I__get_type_ref(type)) < 0)
+    if ((ret_value = H5I__get_type_ref(type)) < 0)
         HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't get ID type ref count")
 
 done:
@@ -1772,25 +1713,21 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I__get_type_ref
- *
- * Purpose:	Retrieve the reference count for an ID type.
+ * Function:    H5I__get_type_ref
  *
- * Return:	Success:	The reference count.
+ * Purpose:     Retrieve the reference count for an ID type.
  *
- *		Failure:	Negative
+ * Return:      Success:    The reference count.
  *
- * Programmer:  Nat Furrer
- *		James Laird
- *              April 30, 2004
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
 static int
 H5I__get_type_ref(H5I_type_t type)
 {
-    H5I_id_type_t	*type_ptr;	/*ptr to the type	*/
-    int ret_value = -1;                 /* Return value */
+    H5I_id_type_t   *type_ptr;          /* Pointer to the type  */
+    int             ret_value = -1;     /* Return value         */
 
     FUNC_ENTER_STATIC
 
@@ -1799,7 +1736,7 @@ H5I__get_type_ref(H5I_type_t type)
 
     /* Check arguments */
     type_ptr = H5I_id_type_list_g[type];
-    if(!type_ptr)
+    if (!type_ptr)
         HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, FAIL, "invalid type")
 
     /* Set return value */
@@ -1811,17 +1748,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iis_valid
+ * Function:    H5Iis_valid
  *
- * Purpose:	Check if the given id is valid.  An id is valid if it is in
+ * Purpose:     Check if the given id is valid.  An id is valid if it is in
  *              use and has an application reference count of at least 1.
  *
- * Return:	Success:        TRUE if the id is valid, FALSE otherwise.
+ * Return:      Success:    TRUE if the id is valid, FALSE otherwise.
  *
- *              Failure:	Negative (never fails currently)
- *
- * Programmer:  Neil Fortner
- *              Friday, October 31, 2008 (boo)
+ *              Failure:    Negative (never fails currently)
  *
  *-------------------------------------------------------------------------
  */
@@ -1837,9 +1771,7 @@ H5Iis_valid(hid_t id)
     /* Find the ID */
     if (NULL == (id_ptr = H5I__find_id(id)))
         ret_value = FALSE;
-
-    /* Check if the found id is an internal id */
-    else if (!id_ptr->app_count)
+    else if (!id_ptr->app_count) /* Check if the found id is an internal id */
         ret_value = FALSE;
 
 done:
@@ -1848,19 +1780,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I__search_cb
+ * Function:    H5I__search_cb
  *
- * Purpose:	Callback routine for H5Isearch, when it calls H5I_iterate.
- *		Calls "user" callback search function, and then sets return
- *		value, based on the result of that callback.
+ * Purpose:     Callback routine for H5Isearch, when it calls H5I_iterate.
+ *              Calls "user" callback search function, and then sets return
+ *              value, based on the result of that callback.
  *
- * Return:	Success:	The first object in the type for which FUNC
- *				returns non-zero. NULL if FUNC returned zero
- *				for every object in the type.
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *		Friday, March 30, 2012
+ * Return:      Success:    The first object in the type for which FUNC
+ *                          returns non-zero. NULL if FUNC returned zero
+ *                          for every object in the type.
+ *              Failure:    NULL
  *
  *-------------------------------------------------------------------------
  */
@@ -1873,7 +1802,7 @@ H5I__search_cb(void *obj, hid_t id, void *_udata)
     FUNC_ENTER_STATIC_NOERR
 
     ret_value = (*udata->app_cb)(obj, id, udata->app_key);
-    if(ret_value > 0)
+    if (ret_value > 0)
         udata->ret_obj = obj;
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1881,26 +1810,22 @@ H5I__search_cb(void *obj, hid_t id, void *_udata)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Isearch
- *
- * Purpose:	Apply function FUNC to each member of type TYPE and return a
- *		pointer to the first object for which FUNC returns non-zero.
- *		The FUNC should take a pointer to the object and the KEY as
- *		arguments and return non-zero to terminate the search (zero
- *		to continue).  Public interface to H5I_search.
+ * Function:    H5Isearch
  *
- * Limitation:	Currently there is no way to start searching from where a
- *		previous search left off.
+ * Purpose:     Apply function FUNC to each member of type TYPE and return a
+ *              pointer to the first object for which FUNC returns non-zero.
+ *              The FUNC should take a pointer to the object and the KEY as
+ *              arguments and return non-zero to terminate the search (zero
+ *              to continue).  Public interface to H5I_search.
  *
- * Return:	Success:	The first object in the type for which FUNC
- *				returns non-zero. NULL if FUNC returned zero
- *				for every object in the type.
+ * Limitation:  Currently there is no way to start searching from where a
+ *              previous search left off.
  *
- *		Failure:	NULL
+ * Return:      Success:    The first object in the type for which FUNC
+ *                          returns non-zero. NULL if FUNC returned zero
+ *                          for every object in the type.
  *
- * Programmer:	James Laird
- *		Nathaniel Furrer
- *		Friday, April 23, 2004
+ *              Failure:    NULL
  *
  *-------------------------------------------------------------------------
  */
@@ -1914,7 +1839,7 @@ H5Isearch(H5I_type_t type, H5I_search_func_t func, void *key)
     H5TRACE3("*x", "Itx*x", type, func, key);
 
     /* Check arguments */
-    if(H5I_IS_LIB_TYPE(type))
+    if (H5I_IS_LIB_TYPE(type))
         HGOTO_ERROR(H5E_ATOM, H5E_BADGROUP, NULL, "cannot call public function on library type")
 
     /* Set up udata struct */
@@ -1936,17 +1861,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I__iterate_cb
+ * Function:    H5I__iterate_cb
  *
- * Purpose:	Callback routine for H5I_iterate, invokes "user" callback
+ * Purpose:     Callback routine for H5I_iterate, invokes "user" callback
  *              function, and then sets return value, based on the result of
  *              that callback.
  *
- * Return:	Success:	Non-negative on success
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		Thursday, October 3, 2013
+ * Return:      Success:    Non-negative on success
+ *              Failure:    Negative
  *
  *-------------------------------------------------------------------------
  */
@@ -1978,29 +1900,25 @@ H5I__iterate_cb(void *_item, void H5_ATTR_UNUSED *_key, void *_udata)
 /*-------------------------------------------------------------------------
  * Function:	H5I_iterate
  *
- * Purpose:	Apply function FUNC to each member of type TYPE (with 
- *		non-zero application reference count if app_ref is TRUE).  
- *		Stop if FUNC returns a non zero value (i.e. anything 
- *		other than H5_ITER_CONT).  
+ * Purpose:     Apply function FUNC to each member of type TYPE (with 
+ *              non-zero application reference count if app_ref is TRUE).  
+ *              Stop if FUNC returns a non zero value (i.e. anything 
+ *              other than H5_ITER_CONT).  
  *
- *		If FUNC returns a positive value (i.e. H5_ITER_STOP), 
- *		return SUCCEED.
+ *              If FUNC returns a positive value (i.e. H5_ITER_STOP), 
+ *              return SUCCEED.
  *
- *		If FUNC returns a negative value (i.e. H5_ITER_ERROR), 
- *		return FAIL.
+ *              If FUNC returns a negative value (i.e. H5_ITER_ERROR), 
+ *              return FAIL.
  *		
- *		The FUNC should take a pointer to the object and the 
- *		udata as arguments and return non-zero to terminate 
- *		siteration, and zero to continue.
- *
- * Limitation:	Currently there is no way to start the iteration from 
- *		where a previous iteration left off.
+ *              The FUNC should take a pointer to the object and the 
+ *              udata as arguments and return non-zero to terminate 
+ *              siteration, and zero to continue.
  *
- * Return:	Success:	SUCCEED
- *		Failure:	FAIL
+ * Limitation:  Currently there is no way to start the iteration from 
+ *              where a previous iteration left off.
  *
- * Programmer:	John Mainzer
- *		Monday, December 6, 2011
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
@@ -2013,12 +1931,12 @@ H5I_iterate(H5I_type_t type, H5I_search_func_t func, void *udata, hbool_t app_re
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Check arguments */
-    if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
+    if (type <= H5I_BADID || type >= H5I_next_type)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid type number")
     type_ptr = H5I_id_type_list_g[type];
 
     /* Only iterate through ID list if it is initialized and there are IDs in type */
-    if(type_ptr && type_ptr->init_count > 0 && type_ptr->id_count > 0) {
+    if (type_ptr && type_ptr->init_count > 0 && type_ptr->id_count > 0) {
         H5I_iterate_ud_t iter_udata;    /* User data for iteration callback */
         herr_t iter_status;             /* Iteration status */
 
@@ -2028,9 +1946,9 @@ H5I_iterate(H5I_type_t type, H5I_search_func_t func, void *udata, hbool_t app_re
         iter_udata.app_ref = app_ref;
 
         /* Iterate over IDs */
-        if((iter_status = H5SL_iterate(type_ptr->ids, H5I__iterate_cb, &iter_udata)) < 0)
+        if ((iter_status = H5SL_iterate(type_ptr->ids, H5I__iterate_cb, &iter_udata)) < 0)
             HGOTO_ERROR(H5E_ATOM, H5E_BADITER, FAIL, "iteration failed")
-    } /* end if */
+    }
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2038,16 +1956,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I__find_id
+ * Function:    H5I__find_id
  *
- * Purpose:	Given an object ID find the info struct that describes the
- *		object.
+ * Purpose:     Given an object ID find the info struct that describes the
+ *              object.
  *
- * Return:	Success:	Ptr to the object's info struct.
+ * Return:      Success:    A pointer to the object's info struct.
  *
- *		Failure:	NULL
- *
- * Programmer:	Unknown
+ *              Failure:    NULL
  *
  *-------------------------------------------------------------------------
  */
@@ -2062,12 +1978,12 @@ H5I__find_id(hid_t id)
 
     /* Check arguments */
     type = H5I_TYPE(id);
-    if(type <= H5I_BADID || type >= H5I_next_type)
-	HGOTO_DONE(NULL)
+    if (type <= H5I_BADID || type >= H5I_next_type)
+        HGOTO_DONE(NULL)
 
     type_ptr = H5I_id_type_list_g[type];
-    if(!type_ptr || type_ptr->init_count <= 0)
-	HGOTO_DONE(NULL)
+    if (!type_ptr || type_ptr->init_count <= 0)
+        HGOTO_DONE(NULL)
 
     /* Locate the ID node for the ID */
     ret_value = (H5I_id_info_t *)H5SL_search(type_ptr->ids, &id);
@@ -2078,17 +1994,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function: H5Iget_name
+ * Function:    H5Iget_name
  *
- * Purpose: Gets a name of an object from its ID.
+ * Purpose:     Gets a name of an object from its ID.
  *
- * Return: Success: The length of name.
+ * Return:      Success:    The length of the name
  *
- *         Failure: -1
- *
- * Programmer: Pedro Vicente, pvn@ncsa.uiuc.edu
- *
- * Date: July 26, 2002
+ *              Failure:    -1
  *
  * Comments: Public function
  *  If `name' is non-NULL then write up to `size' bytes into that
@@ -2113,11 +2025,11 @@ H5Iget_name(hid_t id, char *name/*out*/, size_t size)
 
     /* Get object location */
     if(H5G_loc(id, &loc) < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve object location")
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve object location")
 
-    /* Call internal group routine to retrieve object's name */
-    if((ret_value = H5G_get_name(&loc, name, size, NULL, H5P_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve object name")
+    /* Call internal routine to retrieve object's name */
+    if((ret_value = H5I__get_name(&loc, name, size)) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve object name")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2125,30 +2037,62 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Iget_file_id
+ * Function:    H5I__get_name
  *
- * Purpose:	The public version of H5I_get_file_id(), obtains the file
- *              ID given an object ID.  User has to close this ID.
+ * Purpose:     Internal routine to retrieve the name for an object
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:      Success:    The length of the name
+ *              Failure:    -1
+ *
+ * Programmer:	Quincey Koziol
+ *		January 9, 2018
+ *
+ *-------------------------------------------------------------------------
+ */
+static ssize_t
+H5I__get_name(const H5G_loc_t *loc, char *name, size_t size)
+{
+    ssize_t ret_value = FAIL;   /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+
+    /* Retrieve object's name */
+    if((ret_value = H5G_get_name(loc, name, size, NULL)) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve object name")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5I__get_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Iget_file_id
  *
- * Return:	Success:	file ID
+ * Purpose:     The public version of H5I_get_file_id(), obtains the file
+ *              ID given an object ID.  User has to close this ID.
  *
- *		Failure:	a negative value
+ * Return:      Success:    The file ID associated with the object
  *
- * Programmer:  Raymond Lu
- *              Oct 27, 2003
+ *              Failure:    H5I_INVALID_HID
  *
  *-------------------------------------------------------------------------
  */
 hid_t
 H5Iget_file_id(hid_t obj_id)
 {
-    hid_t ret_value;            /* Return value */
+    hid_t ret_value = H5I_INVALID_HID;          /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("i", "i", obj_id);
 
-    if((ret_value = H5I_get_file_id(obj_id, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve file ID")
+    if ((ret_value = H5I_get_file_id(obj_id, TRUE)) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, H5I_INVALID_HID, "can't retrieve file ID")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2156,50 +2100,48 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I_get_file_id
+ * Function:    H5I_get_file_id
  *
- * Purpose:	The private version of H5Iget_file_id(), obtains the file
+ * Purpose:     The private version of H5Iget_file_id(), obtains the file
  *              ID given an object ID.
  *
- * Return:	Success:	file ID
- *		Failure:	a negative value
+ * Return:      Success:    The file ID associated with the object
  *
- * Programmer:  Raymond Lu
- *              Oct 27, 2003
+ *              Failure:	H5I_INVALID_HID
  *
  *-------------------------------------------------------------------------
  */
 hid_t
 H5I_get_file_id(hid_t obj_id, hbool_t app_ref)
 {
-    H5I_type_t type;            /* ID type */
-    hid_t ret_value = H5I_INVALID_HID;            /* Return value */
+    H5I_type_t  type;                           /* ID type                  */
+    hid_t       ret_value = H5I_INVALID_HID;    /* Return value             */
 
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Get object type */
     type = H5I_TYPE(obj_id);
-    if(type == H5I_FILE) {
+    if (type == H5I_FILE) {
         /* Increment reference count on file ID */
         if(H5I_inc_ref(obj_id, app_ref) < 0)
-            HGOTO_ERROR(H5E_ATOM, H5E_CANTSET, FAIL, "incrementing file ID failed")
+            HGOTO_ERROR(H5E_ATOM, H5E_CANTSET, H5I_INVALID_HID, "incrementing file ID failed")
 
         /* Set return value */
         ret_value = obj_id;
-    } /* end if */
-    else if(type == H5I_DATATYPE || type == H5I_GROUP || type == H5I_DATASET || type == H5I_ATTR) {
+    }
+    else if (type == H5I_DATATYPE || type == H5I_GROUP || type == H5I_DATASET || type == H5I_ATTR) {
         H5G_loc_t loc;              /* Location of object */
 
         /* Get the object location information */
         if(H5G_loc(obj_id, &loc) < 0)
-            HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't get object location")
+            HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, H5I_INVALID_HID, "can't get object location")
 
         /* Get the file ID for the object */
         if((ret_value = H5F_get_id(loc.oloc->file, app_ref)) < 0)
-            HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't get file ID")
-    } /* end if */
+            HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, H5I_INVALID_HID, "can't get file ID")
+    }
     else
-        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "invalid object ID")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, H5I_INVALID_HID, "invalid object ID")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2208,34 +2150,29 @@ done:
 #ifdef H5I_DEBUG_OUTPUT
 
 /*-------------------------------------------------------------------------
- * Function:	H5I__debug_cb
+ * Function:    H5I__debug_cb
  *
- * Purpose:	Dump the contents of an ID to stderr for debugging.
+ * Purpose:     Dump the contents of an ID to stderr for debugging.
  *
- * Return:	Success: Non-negative
- *		Failure: Negative
- *
- * Programmer:	Robb Matzke
- *		Friday, February 19, 1999
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5I__debug_cb(void *_item, void H5_ATTR_UNUSED *_key, void *_udata)
 {
-    H5I_id_info_t *item = (H5I_id_info_t *)_item;       /* Pointer to the ID node */
-    H5I_type_t type = *(H5I_type_t *)_udata;            /* User data */
-    H5G_name_t *path = NULL;
-    int ret_value = H5_ITER_CONT;                       /* Return value */
+    H5I_id_info_t   *item = (H5I_id_info_t *)_item;     /* Pointer to the ID node */
+    H5I_type_t      type = *(H5I_type_t *)_udata;       /* User data */
+    H5G_name_t      *path = NULL;
 
     FUNC_ENTER_STATIC_NOERR
 
-    fprintf(stderr, "		 id = %lu\n", (unsigned long)(item->id));
-    fprintf(stderr, "		 count = %u\n", item->count);
-    fprintf(stderr, "		 obj   = 0x%08lx\n", (unsigned long)(item->obj_ptr));
+    HDfprintf(stderr, "		 id = %lu\n", (unsigned long)(item->id));
+    HDfprintf(stderr, "		 count = %u\n", item->count);
+    HDfprintf(stderr, "		 obj   = 0x%08lx\n", (unsigned long)(item->obj_ptr));
 
     /* Get the group location, so we get get the name */
-    switch(type) {
+    switch (type) {
         case H5I_GROUP:
             path = H5G_nameof((H5G_t*)item->obj_ptr);
             break;
@@ -2248,31 +2185,40 @@ H5I__debug_cb(void *_item, void H5_ATTR_UNUSED *_key, void *_udata)
             path = H5T_nameof((H5T_t*)item->obj_ptr);
             break;
 
+        case H5I_UNINIT:
+        case H5I_BADID:
+        case H5I_FILE:
+        case H5I_DATASPACE:
+        case H5I_ATTR:
+        case H5I_REFERENCE:
+        case H5I_VFL:
+        case H5I_GENPROP_CLS:
+        case H5I_GENPROP_LST:
+        case H5I_ERROR_CLASS:
+        case H5I_ERROR_MSG:
+        case H5I_ERROR_STACK:
+        case H5I_NTYPES:
         default:
             break;   /* Other types of IDs are not stored in files */
-    } /* end switch*/
+    }
 
-    if(path) {
-        if(path->user_path_r)
-            fprintf(stderr, "                user_path = %s\n", H5RS_get_str(path->user_path_r));
-        if(path->full_path_r)
-            fprintf(stderr, "                full_path = %s\n", H5RS_get_str(path->full_path_r));
-    } /* end if */
+    if (path) {
+        if (path->user_path_r)
+            HDfprintf(stderr, "                user_path = %s\n", H5RS_get_str(path->user_path_r));
+        if (path->full_path_r)
+            HDfprintf(stderr, "                full_path = %s\n", H5RS_get_str(path->full_path_r));
+    }
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5I__debug_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5I__debug
- *
- * Purpose:	Dump the contents of a type to stderr for debugging.
+ * Function:    H5I__debug
  *
- * Return:	Success: Non-negative
- *		Failure: Negative
+ * Purpose:     Dump the contents of a type to stderr for debugging.
  *
- * Programmer:	Robb Matzke
- *		Friday, February 19, 1999
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
@@ -2283,17 +2229,17 @@ H5I__debug(H5I_type_t type)
 
     FUNC_ENTER_STATIC_NOERR
 
-    fprintf(stderr, "Dumping ID type %d\n", (int)type);
+    HDfprintf(stderr, "Dumping ID type %d\n", (int)type);
     type_ptr = H5I_id_type_list_g[type];
 
     /* Header */
-    fprintf(stderr, "	 init_count = %u\n", type_ptr->init_count);
-    fprintf(stderr, "	 reserved   = %u\n", type_ptr->cls->reserved);
-    fprintf(stderr, "	 id_count   = %llu\n", (unsigned long long)type_ptr->id_count);
-    fprintf(stderr, "	 nextid	    = %llu\n", (unsigned long long)type_ptr->nextid);
+    HDfprintf(stderr, "	 init_count = %u\n", type_ptr->init_count);
+    HDfprintf(stderr, "	 reserved   = %u\n", type_ptr->cls->reserved);
+    HDfprintf(stderr, "	 id_count   = %llu\n", (unsigned long long)type_ptr->id_count);
+    HDfprintf(stderr, "	 nextid	    = %llu\n", (unsigned long long)type_ptr->nextid);
 
     /* List */
-    fprintf(stderr, "	 List:\n");
+    HDfprintf(stderr, "	 List:\n");
     H5SL_iterate(type_ptr->ids, H5I__debug_cb, &type);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
diff --git a/src/H5Imodule.h b/src/H5Imodule.h
index 19cc9a4..60bda5a 100644
--- a/src/H5Imodule.h
+++ b/src/H5Imodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Ipkg.h b/src/H5Ipkg.h
index 0a6ae8c..16d7d67 100644
--- a/src/H5Ipkg.h
+++ b/src/H5Ipkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Iprivate.h b/src/H5Iprivate.h
index c916f31..25cea4f 100644
--- a/src/H5Iprivate.h
+++ b/src/H5Iprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-----------------------------------------------------------------------------
diff --git a/src/H5Ipublic.h b/src/H5Ipublic.h
index 3bf3c66..c737bbe 100644
--- a/src/H5Ipublic.h
+++ b/src/H5Ipublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -30,26 +28,28 @@
  * fail otherwise).
  *
  * When adding types here, add a section to the 'misc19' test in test/tmisc.c
- * to verify that the H5I{inc|dec|get}_ref() routines work correctly with in.
+ * to verify that the H5I{inc|dec|get}_ref() routines work correctly with it.
  *
+ * NOTE: H5I_REFERENCE is not used by the library and has been deprecated
+ *       with a tentative removal version of 1.12.0. (DER, July 2017)
  */
 typedef enum H5I_type_t {
-    H5I_UNINIT		= (-2), /*uninitialized type			    */
-    H5I_BADID		= (-1),	/*invalid Type				    */
-    H5I_FILE            = 1,  	/*type ID for File objects      	    */
-    H5I_GROUP,	                /*type ID for Group objects     	    */
-    H5I_DATATYPE,	        /*type ID for Datatype objects		    */
-    H5I_DATASPACE,	        /*type ID for Dataspace objects		    */
-    H5I_DATASET,	        /*type ID for Dataset objects		    */
-    H5I_ATTR,		        /*type ID for Attribute objects		    */
-    H5I_REFERENCE,	        /*type ID for Reference objects		    */
-    H5I_VFL,			/*type ID for virtual file layer	    */
-    H5I_GENPROP_CLS,            /*type ID for generic property list classes */
-    H5I_GENPROP_LST,            /*type ID for generic property lists        */
-    H5I_ERROR_CLASS,            /*type ID for error classes		    */
-    H5I_ERROR_MSG,              /*type ID for error messages		    */
-    H5I_ERROR_STACK,            /*type ID for error stacks		    */
-    H5I_NTYPES		        /*number of library types, MUST BE LAST!    */
+    H5I_UNINIT      = (-2),     /* uninitialized type                           */
+    H5I_BADID       = (-1),     /* invalid Type                                 */
+    H5I_FILE        = 1,        /* type ID for File objects                     */
+    H5I_GROUP,                  /* type ID for Group objects                    */
+    H5I_DATATYPE,               /* type ID for Datatype objects                 */
+    H5I_DATASPACE,              /* type ID for Dataspace objects                */
+    H5I_DATASET,                /* type ID for Dataset objects                  */
+    H5I_ATTR,                   /* type ID for Attribute objects                */
+    H5I_REFERENCE,              /* *DEPRECATED* type ID for Reference objects   */
+    H5I_VFL,                    /* type ID for virtual file layer               */
+    H5I_GENPROP_CLS,            /* type ID for generic property list classes    */
+    H5I_GENPROP_LST,            /* type ID for generic property lists           */
+    H5I_ERROR_CLASS,            /* type ID for error classes                    */
+    H5I_ERROR_MSG,              /* type ID for error messages                   */
+    H5I_ERROR_STACK,            /* type ID for error stacks                     */
+    H5I_NTYPES                  /* number of library types, MUST BE LAST!       */
 } H5I_type_t;
 
 /* Type of atoms to return to users */
diff --git a/src/H5Itest.c b/src/H5Itest.c
index 506ca87..426c026 100644
--- a/src/H5Itest.c
+++ b/src/H5Itest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@hdfgoup.org>
@@ -32,6 +30,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACprivate.h"        /* Metadata cache                       */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Gprivate.h"		/* Groups				*/
 #include "H5Ipkg.h"		/* IDs			  		*/
@@ -80,6 +79,7 @@ ssize_t
 H5I_get_name_test(hid_t id, char *name/*out*/, size_t size, hbool_t *cached)
 {
     H5G_loc_t     loc;          /* Object location */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     ssize_t       ret_value = -1;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -88,11 +88,19 @@ H5I_get_name_test(hid_t id, char *name/*out*/, size_t size, hbool_t *cached)
     if(H5G_loc(id, &loc) < 0)
 	HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve object location")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_SYM, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Call internal group routine to retrieve object's name */
-    if((ret_value = H5G_get_name(&loc, name, size, cached, H5P_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
+    if((ret_value = H5G_get_name(&loc, name, size, cached)) < 0)
 	HGOTO_ERROR(H5E_ATOM, H5E_CANTGET, FAIL, "can't retrieve object name")
 
 done:
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "can't reset API context")
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5I_get_name_test() */
 
diff --git a/src/H5L.c b/src/H5L.c
index ecdf8a2..b26a8c4 100644
--- a/src/H5L.c
+++ b/src/H5L.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -25,6 +23,7 @@
 /***********/
 #include "H5private.h"          /* Generic Functions                    */
 #include "H5ACprivate.h"        /* Metadata cache                       */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"         /* Datasets                             */
 #include "H5Eprivate.h"         /* Error handling                       */
 #include "H5Fprivate.h"		/* File access                          */
@@ -49,26 +48,12 @@
 /* User data for path traversal routine for getting link info by name */
 typedef struct {
     H5L_info_t      *linfo;             /* Buffer to return to user */
-    hid_t           dxpl_id;            /* DXPL to use in callback */
 } H5L_trav_gi_t;
 
-/* User data for path traversal routine for getting link info by index */
-typedef struct {
-    /* In */
-    H5_index_t idx_type;               /* Index to use */
-    H5_iter_order_t order;              /* Order to iterate in index */
-    hsize_t n;                          /* Offset of link within index */
-    hid_t dxpl_id;                      /* DXPL to use in callback */
-
-    /* Out */
-    H5L_info_t      *linfo;             /* Buffer to return to user */
-} H5L_trav_gibi_t;
-
 /* User data for path traversal callback to creating a link */
 typedef struct {
     H5F_t *file;                        /* Pointer to the file */
     H5P_genplist_t *lc_plist;           /* Link creation property list */
-    hid_t dxpl_id;                      /* Dataset transfer property list */
     H5G_name_t *path;                   /* Path to object being linked */
     H5O_obj_create_t *ocrt_info;        /* Pointer to object creation info */
     H5O_link_t *lnk;                    /* Pointer to link information to insert */
@@ -78,11 +63,10 @@ typedef struct {
 typedef struct {
     const char *dst_name;               /* Destination name for moving object */
     H5T_cset_t cset;                    /* Char set for new name */
-    H5G_loc_t  *dst_loc;		/* Destination location for moving object */
+    const H5G_loc_t  *dst_loc;		/* Destination location for moving object */
     unsigned dst_target_flags;          /* Target flags for destination object */
     hbool_t copy;                       /* TRUE if this is a copy operation */
-    hid_t lapl_id;                      /* LAPL to use in callback */
-    hid_t dxpl_id;                      /* DXPL to use in callback */
+    size_t orig_nlinks;                 /* The original value for the # of soft / UD links that can be traversed */
 } H5L_trav_mv_t;
 
 /* User data for path traversal routine for moving and renaming an object */
@@ -90,15 +74,12 @@ typedef struct {
     H5F_t *file;                        /* Pointer to the file */
     H5O_link_t *lnk;                    /* Pointer to link information to insert */
     hbool_t copy;                       /* TRUE if this is a copy operation */
-    hid_t dxpl_id;                      /* Dataset transfer property list */
 } H5L_trav_mv2_t;
 
 /* User data for path traversal routine for checking if a link exists */
 typedef struct {
     /* Down */
     char *sep;                          /* Pointer to next separator in the string */
-    hid_t lapl_id;                      /* Link access property list */
-    hid_t dxpl_id;                      /* Dataset transfer property list */
 
     /* Up */
     hbool_t exists;                     /* Whether the link exists or not */
@@ -110,94 +91,81 @@ typedef struct {
     void *buf;                          /* User buffer */
 } H5L_trav_gv_t;
 
-/* User data for path traversal routine for getting link value by index */
-typedef struct {
-    /* In */
-    H5_index_t idx_type;               /* Index to use */
-    H5_iter_order_t order;              /* Order to iterate in index */
-    hsize_t n;                          /* Offset of link within index */
-    hid_t dxpl_id;                      /* DXPL to use in callback */
-    size_t size;                        /* Size of user buffer */
-
-    /* Out */
-    void *buf;                          /* User buffer */
-} H5L_trav_gvbi_t;
-
-/* User data for path traversal routine for removing link */
-typedef struct {
-    hid_t dxpl_id;                      /* DXPL to use in callback */
-} H5L_trav_rm_t;
-
-/* User data for path traversal routine for removing link by index */
-typedef struct {
-    /* In */
-    H5_index_t idx_type;               /* Index to use */
-    H5_iter_order_t order;              /* Order to iterate in index */
-    hsize_t n;                          /* Offset of link within index */
-    hid_t dxpl_id;                      /* DXPL to use in callback */
-} H5L_trav_rmbi_t;
-
-/* User data for path traversal routine for getting name by index */
-typedef struct {
-    /* In */
-    H5_index_t idx_type;                /* Index to use */
-    H5_iter_order_t order;              /* Order to iterate in index */
-    hsize_t n;                          /* Offset of link within index */
-    size_t size;                        /* Size of name buffer */
-    hid_t dxpl_id;                      /* DXPL to use in callback */
-
-    /* Out */
-    char *name;                         /* Buffer to return name to user */
-    ssize_t name_len;                   /* Length of full name */
-} H5L_trav_gnbi_t;
-
 /********************/
 /* Local Prototypes */
 /********************/
 
 static int H5L_find_class_idx(H5L_type_t id);
-static herr_t H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5L__link_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_create_real(const H5G_loc_t *link_loc, const char *link_name,
+static herr_t H5L__create_real(const H5G_loc_t *link_loc, const char *link_name,
     H5G_name_t *obj_path, H5F_t *obj_file, H5O_link_t *lnk, H5O_obj_create_t *ocrt_info,
-    hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id);
-static herr_t H5L_get_val_real(const H5O_link_t *lnk, void *buf, size_t size);
-static herr_t H5L_get_val_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+    hid_t lcpl_id);
+static herr_t H5L__create_hard(H5G_loc_t *cur_loc, const char *cur_name,
+    const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id);
+static herr_t H5L__create_soft(const char *target_path, const H5G_loc_t *link_loc,
+    const char *link_name, hid_t lcpl_id);
+static herr_t H5L__get_val_real(const H5O_link_t *lnk, void *buf, size_t size);
+static herr_t H5L__get_val_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_get_val_by_idx_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5L__get_val(const H5G_loc_t *loc, const char *name,
+    void *buf/*out*/, size_t size);
+static herr_t H5L__get_val_by_idx_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_delete_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5L__get_val_by_idx(const H5G_loc_t *loc, const char *name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
+    void *buf/*out*/, size_t size);
+static herr_t H5L__delete_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_delete_by_idx_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5L__delete(const H5G_loc_t *loc, const char *name);
+static herr_t H5L__delete_by_idx_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_move_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5L__delete_by_idx(const H5G_loc_t *loc, const char *name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n);
+static herr_t H5L__move_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_move_dest_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5L__move_dest_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
+static herr_t H5L__move(const H5G_loc_t *src_loc, const char *src_name,
+    H5G_loc_t *dst_loc, const char *dst_name, hbool_t copy_flag, hid_t lcpl_id);
 static herr_t H5L__exists_final_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
 static herr_t H5L__exists_inter_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static htri_t H5L__exists(const H5G_loc_t *loc, const char *name, hid_t lapl_id,
-    hid_t dxpl_id);
-static herr_t H5L_get_info_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static htri_t H5L__exists(const H5G_loc_t *loc, const char *name);
+static herr_t H5L__get_info_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_get_info_by_idx_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+static herr_t H5L__get_info(const H5G_loc_t *loc, const char *name,
+    H5L_info_t *linfo/*out*/);
+static herr_t H5L__get_info_by_idx_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
-static herr_t H5L_get_name_by_idx_cb(H5G_loc_t *grp_loc/*in*/,
+static herr_t H5L__get_info_by_idx(const H5G_loc_t *loc, const char *name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
+    H5L_info_t *linfo /*out*/);
+static herr_t H5L__get_name_by_idx_cb(H5G_loc_t *grp_loc/*in*/,
     const char *name, const H5O_link_t *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/);
+static ssize_t H5L__get_name_by_idx(const H5G_loc_t *loc, const char *group_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n,
+    char *name /*out*/, size_t size);
+static herr_t H5L__iterate(hid_t grp_id, const char *group_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t *idx_p,
+    H5L_iterate_t op, void *op_data);
+static herr_t H5L__visit(hid_t grp_id, const char *group_name,
+    H5_index_t idx_type, H5_iter_order_t order, H5L_iterate_t op,
+    void *op_data);
+
 
 /*********************/
 /* Package Variables */
@@ -336,8 +304,7 @@ H5Lmove(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
 {
     H5G_loc_t	src_loc, *src_loc_p;
     H5G_loc_t	dst_loc, *dst_loc_p;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;         /* dxpl used by library */
-    herr_t      ret_value=SUCCEED;              /* Return value */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE6("e", "i*si*sii", src_loc_id, src_name, dst_loc_id, dst_name, lcpl_id,
@@ -357,11 +324,10 @@ H5Lmove(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
     if(lcpl_id != H5P_DEFAULT && (TRUE != H5P_isa_class(lcpl_id, H5P_LINK_CREATE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a link creation property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id,
-                               ((src_loc_id != H5L_SAME_LOC) ? src_loc_id : dst_loc_id),
-                               TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, 
+            ((src_loc_id != H5L_SAME_LOC) ? src_loc_id : dst_loc_id), TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Set up src & dst location pointers */
     src_loc_p = &src_loc;
@@ -372,8 +338,7 @@ H5Lmove(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
         dst_loc_p = src_loc_p;
 
     /* Move the link */
-    if(H5L_move(src_loc_p, src_name, dst_loc_p, dst_name, FALSE, lcpl_id,
-            lapl_id, dxpl_id) < 0)
+    if(H5L__move(src_loc_p, src_name, dst_loc_p, dst_name, FALSE, lcpl_id) < 0)
 	HGOTO_ERROR(H5E_LINK, H5E_CANTMOVE, FAIL, "unable to move link")
 
 done:
@@ -401,8 +366,7 @@ H5Lcopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
 {
     H5G_loc_t	src_loc, *src_loc_p;
     H5G_loc_t	dst_loc, *dst_loc_p;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;         /* dxpl used by library */
-    herr_t      ret_value=SUCCEED;              /* Return value */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE6("e", "i*si*sii", src_loc_id, src_name, dst_loc_id, dst_name, lcpl_id,
@@ -422,11 +386,10 @@ H5Lcopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
     if(lcpl_id != H5P_DEFAULT && (TRUE != H5P_isa_class(lcpl_id, H5P_LINK_CREATE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a link creation property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id,
-                               ((src_loc_id != H5L_SAME_LOC) ? src_loc_id : dst_loc_id),
-                               TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, 
+            ((src_loc_id != H5L_SAME_LOC) ? src_loc_id : dst_loc_id), TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Set up src & dst location pointers */
     src_loc_p = &src_loc;
@@ -437,8 +400,7 @@ H5Lcopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
         dst_loc_p = src_loc_p;
 
     /* Copy the link */
-    if(H5L_move(src_loc_p, src_name, dst_loc_p, dst_name, TRUE, lcpl_id,
-                lapl_id, dxpl_id) < 0)
+    if(H5L__move(src_loc_p, src_name, dst_loc_p, dst_name, TRUE, lcpl_id) < 0)
 	HGOTO_ERROR(H5E_LINK, H5E_CANTMOVE, FAIL, "unable to move link")
 
 done:
@@ -465,11 +427,10 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Lcreate_soft(const char *link_target,
-    hid_t link_loc_id, const char *link_name, hid_t lcpl_id, hid_t lapl_id)
+H5Lcreate_soft(const char *link_target, hid_t link_loc_id,
+    const char *link_name, hid_t lcpl_id, hid_t lapl_id)
 {
     H5G_loc_t	link_loc;               /* Group location for new link */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -485,13 +446,13 @@ H5Lcreate_soft(const char *link_target,
     if(lcpl_id != H5P_DEFAULT && (TRUE != H5P_isa_class(lcpl_id, H5P_LINK_CREATE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a link creation property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, link_loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, link_loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Create the link */
-    if(H5L_create_soft(link_target, &link_loc, link_name, lcpl_id, lapl_id, dxpl_id) < 0)
-	HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create link")
+    if(H5L__create_soft(link_target, &link_loc, link_name, lcpl_id) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTCREATE, FAIL, "unable to create link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -520,8 +481,7 @@ H5Lcreate_hard(hid_t cur_loc_id, const char *cur_name,
 {
     H5G_loc_t	cur_loc, *cur_loc_p;
     H5G_loc_t	new_loc, *new_loc_p;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;         /* dxpl used by library */
-    herr_t      ret_value = SUCCEED;            /* Return value */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE6("e", "i*si*sii", cur_loc_id, cur_name, new_loc_id, new_name, lcpl_id,
@@ -541,9 +501,9 @@ H5Lcreate_hard(hid_t cur_loc_id, const char *cur_name,
     if(lcpl_id != H5P_DEFAULT && (TRUE != H5P_isa_class(lcpl_id, H5P_LINK_CREATE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a link creation property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, cur_loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, cur_loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Set up current & new location pointers */
     cur_loc_p = &cur_loc;
@@ -556,9 +516,8 @@ H5Lcreate_hard(hid_t cur_loc_id, const char *cur_name,
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "source and destination should be in the same file.")
 
     /* Create the link */
-    if(H5L_create_hard(cur_loc_p, cur_name, new_loc_p, new_name,
-                lcpl_id, lapl_id, dxpl_id) < 0)
-	HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create link")
+    if(H5L__create_hard(cur_loc_p, cur_name, new_loc_p, new_name, lcpl_id) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTCREATE, FAIL, "unable to create link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -594,8 +553,7 @@ H5Lcreate_ud(hid_t link_loc_id, const char *link_name, H5L_type_t link_type,
     const void *udata, size_t udata_size, hid_t lcpl_id, hid_t lapl_id)
 {
     H5G_loc_t	link_loc;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;         /* dxpl used by library */
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE7("e", "i*sLl*xzii", link_loc_id, link_name, link_type, udata,
@@ -609,12 +567,12 @@ H5Lcreate_ud(hid_t link_loc_id, const char *link_name, H5L_type_t link_type,
     if(link_type < H5L_TYPE_UD_MIN || link_type > H5L_TYPE_MAX)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid link class")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, link_loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, link_loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Create external link */
-    if(H5L_create_ud(&link_loc, link_name, udata, udata_size, link_type, lcpl_id, lapl_id, dxpl_id) < 0)
+    if(H5L__create_ud(&link_loc, link_name, udata, udata_size, link_type, lcpl_id) < 0)
 	HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create link")
 
 done:
@@ -643,7 +601,6 @@ herr_t
 H5Ldelete(hid_t loc_id, const char *name, hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Group's location */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -655,12 +612,12 @@ H5Ldelete(hid_t loc_id, const char *name, hid_t lapl_id)
     if(!name || !*name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Unlink */
-    if(H5L_delete(&loc, name, lapl_id, dxpl_id) < 0)
+    if(H5L__delete(&loc, name) < 0)
 	HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "unable to delete link")
 
 done:
@@ -688,12 +645,10 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Ldelete_by_idx(hid_t loc_id, const char *group_name,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, hid_t lapl_id)
+H5Ldelete_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n, hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Group's location */
-    H5L_trav_rmbi_t udata;              /* User data for callback */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -709,20 +664,13 @@ H5Ldelete_by_idx(hid_t loc_id, const char *group_name,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up user data for unlink operation */
-    udata.idx_type = idx_type;
-    udata.order = order;
-    udata.n = n;
-    udata.dxpl_id = dxpl_id;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Traverse the group hierarchy to remove the link */
-    if(H5G_traverse(&loc, group_name, H5G_TARGET_SLINK|H5G_TARGET_UDLINK|H5G_TARGET_MOUNT, 
-                    H5L_delete_by_idx_cb, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_EXISTS, FAIL, "name doesn't exist")
+    /* Delete the link */
+    if(H5L__delete_by_idx(&loc, group_name, idx_type, order, n) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "unable to delete link")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -753,7 +701,6 @@ H5Lget_val(hid_t loc_id, const char *name, void *buf/*out*/, size_t size,
     hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Group location for location to query */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -765,13 +712,13 @@ H5Lget_val(hid_t loc_id, const char *name, void *buf/*out*/, size_t size,
     if(!name || !*name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Get the link value */
-    if(H5L_get_val(&loc, name, buf, size, lapl_id, dxpl_id) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to get link value for '%s'", name)
+    if(H5L__get_val(&loc, name, buf, size) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link value for '%s'", name)
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -802,8 +749,6 @@ H5Lget_val_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Group location for location to query */
-    H5L_trav_gvbi_t udata;              /* User data for callback */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -820,23 +765,13 @@ H5Lget_val_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up user data for retrieving information */
-    udata.idx_type = idx_type;
-    udata.order = order;
-    udata.n = n;
-    udata.dxpl_id = dxpl_id;
-    udata.buf = buf;
-    udata.size = size;
-
-    /* Traverse the group hierarchy to locate the object to get info about */
-    if(H5G_traverse(&loc, group_name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L_get_val_by_idx_cb, 
-                    &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "name doesn't exist")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
+    /* Get the link value */
+    if(H5L__get_val_by_idx(&loc, group_name, idx_type, order, n, buf, size) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link value for")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -860,25 +795,24 @@ htri_t
 H5Lexists(hid_t loc_id, const char *name, hid_t lapl_id)
 {
     H5G_loc_t	loc;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;         /* dxpl used by library */
-    htri_t ret_value;
+    htri_t      ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE3("t", "i*si", loc_id, name, lapl_id);
 
     /* Check arguments */
     if(H5G_loc(loc_id, &loc))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
     if(!name || !*name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Check for the existence of the link */
-    if((ret_value = H5L__exists(&loc, name, lapl_id, dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to get link info")
+    if((ret_value = H5L__exists(&loc, name)) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link info")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -904,8 +838,7 @@ H5Lget_info(hid_t loc_id, const char *name, H5L_info_t *linfo /*out*/,
     hid_t lapl_id)
 {
     H5G_loc_t	loc;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;         /* dxpl used by library */
-    herr_t ret_value = SUCCEED;
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE4("e", "i*sxi", loc_id, name, linfo, lapl_id);
@@ -916,13 +849,13 @@ H5Lget_info(hid_t loc_id, const char *name, H5L_info_t *linfo /*out*/,
     if(!name || !*name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Get the link information */
-    if(H5L_get_info(&loc, name, linfo, lapl_id, dxpl_id) < 0)
-	HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to get link info")
+    if(H5L__get_info(&loc, name, linfo) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link info")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -949,8 +882,6 @@ H5Lget_info_by_idx(hid_t loc_id, const char *group_name,
     H5L_info_t *linfo /*out*/, hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Group location for group to query */
-    H5L_trav_gibi_t udata;              /* User data for callback */
-    hid_t  dxpl_id = H5AC_ind_read_dxpl_id;  /* dxpl used by library */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -967,21 +898,13 @@ H5Lget_info_by_idx(hid_t loc_id, const char *group_name,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Set up user data for callback */
-    udata.idx_type = idx_type;
-    udata.order = order;
-    udata.n = n;
-    udata.dxpl_id = dxpl_id;
-    udata.linfo = linfo;
-
-    /* Traverse the group hierarchy to locate the object to get info about */
-    if(H5G_traverse(&loc, group_name, H5G_TARGET_SLINK|H5G_TARGET_UDLINK, 
-                    H5L_get_info_by_idx_cb, &udata, lapl_id, dxpl_id) < 0)
-	HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to get link info")
+    /* Get the link information */
+    if(H5L__get_info_by_idx(&loc, group_name, idx_type, order, n, linfo) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link info")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1021,8 +944,12 @@ H5Lregister(const H5L_class_t *cls)
 
     /* Check H5L_class_t version number; this is where a function to convert
      * from an outdated version should be called.
+     *
+     * v0 of the H5L_class_t is only different in the parameters to the
+     * traversal callback, which is handled in H5G_traverse_ud()
+     * (in src/H5Gtraverse.c), so it's allowed to to pass through here. - QAK, 2018/02/06
      */
-    if(cls->version != H5L_LINK_CLASS_T_VERS)
+    if(cls->version > H5L_LINK_CLASS_T_VERS)
       HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid H5L_class_t version number")
 
     if(cls->id < H5L_TYPE_UD_MIN || cls->id > H5L_TYPE_MAX)
@@ -1138,9 +1065,7 @@ H5Lget_name_by_idx(hid_t loc_id, const char *group_name,
     char *name /*out*/, size_t size, hid_t lapl_id)
 {
     H5G_loc_t	loc;            /* Location of group */
-    H5L_trav_gnbi_t udata;      /* User data for callback */
-    hid_t   dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
-    ssize_t ret_value;          /* Return value */
+    ssize_t ret_value;                  /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE8("Zs", "i*sIiIohxzi", loc_id, group_name, idx_type, order, n, name, size,
@@ -1156,26 +1081,13 @@ H5Lget_name_by_idx(hid_t loc_id, const char *group_name,
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Set up user data for callback */
-    udata.idx_type = idx_type;
-    udata.order = order;
-    udata.n = n;
-    udata.dxpl_id = dxpl_id;
-    udata.name = name;
-    udata.size = size;
-    udata.name_len = -1;
-
-    /* Traverse the group hierarchy to locate the link to get name of */
-    if(H5G_traverse(&loc, group_name, H5G_TARGET_SLINK|H5G_TARGET_UDLINK, 
-                    H5L_get_name_by_idx_cb, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "name doesn't exist")
-
-    /* Set the return value */
-    ret_value = udata.name_len;
+    /* Get the link information */
+    if((ret_value = H5L__get_name_by_idx(&loc, group_name, idx_type, order, n, name, size)) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link name")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1183,24 +1095,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Literate
+ * Function:    H5Literate
  *
- * Purpose:	Iterates over links in a group, with user callback routine,
+ * Purpose:     Iterates over links in a group, with user callback routine,
  *              according to the order within an index.
  *
  *              Same pattern of behavior as H5Giterate.
  *
- * Return:	Success:	The return value of the first operator that
- *				returns non-zero, or zero if all members were
- *				processed with no operator returning non-zero.
- *
- *		Failure:	Negative if something goes wrong within the
- *				library, or the negative value returned by one
- *				of the operators.
+ * Return:      Success:    The return value of the first operator that
+ *                          returns non-zero, or zero if all members were
+ *                          processed with no operator returning non-zero.
  *
- *
- * Programmer:	Quincey Koziol
- *              Thursday, November 16, 2006
+ *              Failure:    Negative if something goes wrong within the
+ *                          library, or the negative value returned by one
+ *                          of the operators.
  *
  *-------------------------------------------------------------------------
  */
@@ -1208,41 +1116,26 @@ herr_t
 H5Literate(hid_t grp_id, H5_index_t idx_type, H5_iter_order_t order,
     hsize_t *idx_p, H5L_iterate_t op, void *op_data)
 {
-    H5I_type_t  id_type;        /* Type of ID */
-    H5G_link_iterate_t lnk_op;  /* Link operator */
-    hsize_t     last_lnk;       /* Index of last object looked at */
-    hsize_t	idx;            /* Internal location to hold index */
-    herr_t ret_value;           /* Return value */
+    H5I_type_t  id_type;        /* Type of ID                       */
+    herr_t      ret_value;      /* Return value                     */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE6("e", "iIiIo*hx*x", grp_id, idx_type, order, idx_p, op, op_data);
 
     /* Check arguments */
     id_type = H5I_get_type(grp_id);
-    if(!(H5I_GROUP == id_type || H5I_FILE == id_type))
+    if (!(H5I_GROUP == id_type || H5I_FILE == id_type))
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid argument")
-    if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
-    if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
-    if(!op)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no operator specified")
-
-    /* Set up iteration beginning/end info */
-    idx = (idx_p == NULL ? 0 : *idx_p);
-    last_lnk = 0;
-
-    /* Build link operator info */
-    lnk_op.op_type = H5G_LINK_OP_NEW;
-    lnk_op.op_func.op_new = op;
+    if (idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+    if (order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+    if (!op)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no operator specified")
 
     /* Iterate over the links */
-    if((ret_value = H5G_iterate(grp_id, ".", idx_type, order, idx, &last_lnk, &lnk_op, op_data, H5P_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "link iteration failed")
-
-    /* Set the index we stopped at */
-    if(idx_p)
-        *idx_p = last_lnk;
+    if((ret_value = H5L__iterate(grp_id, ".", idx_type, order, idx_p, op, op_data)) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link iteration failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1276,11 +1169,7 @@ H5Literate_by_name(hid_t loc_id, const char *group_name,
     H5_index_t idx_type, H5_iter_order_t order, hsize_t *idx_p,
     H5L_iterate_t op, void *op_data, hid_t lapl_id)
 {
-    H5G_link_iterate_t lnk_op;  /* Link operator */
-    hsize_t     last_lnk;       /* Index of last object looked at */
-    hsize_t	idx;            /* Internal location to hold index */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id;         /* dxpl used by library */
-    herr_t ret_value;           /* Return value */
+    herr_t      ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE8("e", "i*sIiIo*hx*xi", loc_id, group_name, idx_type, order, idx_p, op,
@@ -1296,27 +1185,14 @@ H5Literate_by_name(hid_t loc_id, const char *group_name,
     if(!op)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no operator specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up iteration beginning/end info */
-    idx = (idx_p == NULL ? 0 : *idx_p);
-    last_lnk = 0;
-
-    /* Build link operator info */
-    lnk_op.op_type = H5G_LINK_OP_NEW;
-    lnk_op.op_func.op_new = op;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Iterate over the links */
-    if((ret_value = H5G_iterate(loc_id, group_name, idx_type, order, idx, &last_lnk, &lnk_op, 
-                                op_data, lapl_id, dxpl_id)) < 0)
+    if((ret_value = H5L__iterate(loc_id, group_name, idx_type, order, idx_p, op, op_data)) < 0)
 	HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link iteration failed")
 
-    /* Set the index we stopped at */
-    if(idx_p)
-        *idx_p = last_lnk;
-
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Literate_by_name() */
@@ -1371,9 +1247,9 @@ H5Lvisit(hid_t grp_id, H5_index_t idx_type, H5_iter_order_t order,
     if(!op)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no callback operator specified")
 
-    /* Call internal group visitation routine */
-    if((ret_value = H5G_visit(grp_id, ".", idx_type, order, op, op_data, H5P_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_BADITER, FAIL, "link visitation failed")
+    /* Call internal routine */
+    if((ret_value = H5L__visit(grp_id, ".", idx_type, order, op, op_data)) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link visitation failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1412,7 +1288,6 @@ herr_t
 H5Lvisit_by_name(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     H5_iter_order_t order, H5L_iterate_t op, void *op_data, hid_t lapl_id)
 {
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1429,12 +1304,12 @@ H5Lvisit_by_name(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     if(!op)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no callback operator specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Call internal group visitation routine */
-    if((ret_value = H5G_visit(loc_id, group_name, idx_type, order, op, op_data, lapl_id, dxpl_id)) < 0)
+    /* Call internal routine */
+    if((ret_value = H5L__visit(loc_id, group_name, idx_type, order, op, op_data)) < 0)
 	HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link visitation failed")
 
 done:
@@ -1628,7 +1503,7 @@ done:
  */
 herr_t
 H5L_link(const H5G_loc_t *new_loc, const char *new_name, H5G_loc_t *obj_loc,
-    hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id)
+    hid_t lcpl_id)
 {
     H5O_link_t lnk;                     /* Link to insert */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -1650,7 +1525,7 @@ H5L_link(const H5G_loc_t *new_loc, const char *new_name, H5G_loc_t *obj_loc,
     lnk.u.hard.addr = obj_loc->oloc->addr;
 
     /* Create the link */
-    if(H5L_create_real(new_loc, new_name, obj_loc->path, obj_loc->oloc->file, &lnk, NULL, lcpl_id, lapl_id, dxpl_id) < 0)
+    if(H5L__create_real(new_loc, new_name, obj_loc->path, obj_loc->oloc->file, &lnk, NULL, lcpl_id) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
 
 done:
@@ -1672,7 +1547,7 @@ done:
  */
 herr_t
 H5L_link_object(const H5G_loc_t *new_loc, const char *new_name,
-    H5O_obj_create_t *ocrt_info, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id)
+    H5O_obj_create_t *ocrt_info, hid_t lcpl_id)
 {
     H5O_link_t lnk;                     /* Link to insert */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -1693,7 +1568,7 @@ H5L_link_object(const H5G_loc_t *new_loc, const char *new_name,
     lnk.type = H5L_TYPE_HARD;
 
     /* Create the link */
-    if(H5L_create_real(new_loc, new_name, NULL, NULL, &lnk, ocrt_info, lcpl_id, lapl_id, dxpl_id) < 0)
+    if(H5L__create_real(new_loc, new_name, NULL, NULL, &lnk, ocrt_info, lcpl_id) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
 
 done:
@@ -1702,7 +1577,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_link_cb
+ * Function:	H5L__link_cb
  *
  * Purpose:	Callback for creating a link to an object.
  *
@@ -1714,7 +1589,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
+H5L__link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR_UNUSED *lnk,
     H5G_loc_t *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
 {
     H5L_trav_cr_t *udata = (H5L_trav_cr_t *)_udata;   /* User data passed in */
@@ -1725,12 +1600,12 @@ H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR
     hbool_t obj_created = FALSE;    /* Whether an object was created (through a hard link) */
     herr_t ret_value = SUCCEED;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid location */
     /* (which is not what we want) */
     if(obj_loc != NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_EXISTS, FAIL, "name already exists")
+        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "name already exists")
 
     /* Check for crossing file boundaries with a new hard link */
     if(udata->lnk->type == H5L_TYPE_HARD) {
@@ -1740,8 +1615,8 @@ H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR
             H5G_loc_t new_loc;          /* Group location for new object */
 
             /* Create new object at this location */
-            if(NULL == (udata->ocrt_info->new_obj = H5O_obj_create(grp_loc->oloc->file, udata->ocrt_info->obj_type, udata->ocrt_info->crt_info, &new_loc, udata->dxpl_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to create object")
+            if(NULL == (udata->ocrt_info->new_obj = H5O_obj_create(grp_loc->oloc->file, udata->ocrt_info->obj_type, udata->ocrt_info->crt_info, &new_loc)))
+                HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create object")
 
             /* Set address for hard link */
             udata->lnk->u.hard.addr = new_loc.oloc->addr;
@@ -1755,7 +1630,7 @@ H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR
         else {
             /* Check that both objects are in same file */
             if(!H5F_SAME_SHARED(grp_loc->oloc->file, udata->file))
-                HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "interfile hard links are not allowed")
+                HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "interfile hard links are not allowed")
         } /* end else */
     } /* end if */
 
@@ -1767,7 +1642,7 @@ H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR
     if(udata->lc_plist) {
         /* Get character encoding property */
         if(H5P_get(udata->lc_plist, H5P_STRCRT_CHAR_ENCODING_NAME, &udata->lnk->cset) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get property value for character encoding")
+            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get property value for character encoding")
     } /* end if */
     else
         udata->lnk->cset = H5F_DEFAULT_CSET;   /* Default character encoding for link */
@@ -1779,14 +1654,13 @@ H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR
     /* Insert link into group */
     if(H5G_obj_insert(grp_loc->oloc, name, udata->lnk, TRUE,
             udata->ocrt_info ? udata->ocrt_info->obj_type : H5O_TYPE_UNKNOWN,
-            udata->ocrt_info ? udata->ocrt_info->crt_info : NULL,
-            udata->dxpl_id) < 0)
+            udata->ocrt_info ? udata->ocrt_info->crt_info : NULL) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link for object")
 
     /* Set object's path if it has been passed in and is not set */
     if(udata->path != NULL && udata->path->user_path_r == NULL)
         if(H5G_name_set(grp_loc->path, udata->path, name) < 0)
-            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "cannot set name")
+            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "cannot set name")
 
     /* If link is a user-defined link, trigger its creation callback if it has one */
     if(udata->lnk->type >= H5L_TYPE_UD_MIN) {
@@ -1805,17 +1679,17 @@ H5L_link_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t H5_ATTR
              */
             H5G_name_reset(&temp_path);
             if(H5O_loc_copy(&temp_oloc, grp_loc->oloc, H5_COPY_DEEP) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTCOPY, FAIL, "unable to copy object location")
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object location")
 
             temp_loc.oloc = &temp_oloc;
             temp_loc.path = &temp_path;
             temp_loc_init = TRUE;
 
             /* Set up location for user-defined callback */
-            if((grp = H5G_open(&temp_loc, udata->dxpl_id)) == NULL)
-                HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
+            if(NULL == (grp = H5G_open(&temp_loc)))
+                HGOTO_ERROR(H5E_LINK, H5E_CANTOPENOBJ, FAIL, "unable to open group")
             if((grp_id = H5I_register(H5I_GROUP, grp, TRUE)) < 0)
-                HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register ID for group")
+                HGOTO_ERROR(H5E_LINK, H5E_CANTREGISTER, FAIL, "unable to register ID for group")
 
             /* Make callback */
             if((link_class->create_func)(name, grp_id, udata->lnk->u.ud.udata, udata->lnk->u.ud.size, H5P_DEFAULT) < 0)
@@ -1834,18 +1708,18 @@ done:
         oloc.addr = udata->lnk->u.hard.addr;
 
         /* Decrement refcount on new object's object header in memory */
-        if(H5O_dec_rc_by_loc(&oloc, udata->dxpl_id) < 0)
+        if(H5O_dec_rc_by_loc(&oloc) < 0)
            HDONE_ERROR(H5E_LINK, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
     } /* end if */
 
     /* Close the location given to the user callback if it was created */
     if(grp_id >= 0) {
         if(H5I_dec_app_ref(grp_id) < 0)
-            HDONE_ERROR(H5E_ATOM, H5E_CANTRELEASE, FAIL, "unable to close atom from UD callback")
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close atom from UD callback")
     } /* end if */
     else if(grp != NULL) {
         if(H5G_close(grp) < 0)
-            HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
     } /* end if */
     else if(temp_loc_init)
         H5G_loc_free(&temp_loc);
@@ -1855,11 +1729,11 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_link_cb() */
+} /* end H5L__link_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5L_create_real
+ * Function:    H5L__create_real
  *
  * Purpose:     Creates a link at a path location
  *
@@ -1878,9 +1752,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_create_real(const H5G_loc_t *link_loc, const char *link_name,
+H5L__create_real(const H5G_loc_t *link_loc, const char *link_name,
     H5G_name_t *obj_path, H5F_t *obj_file, H5O_link_t *lnk,
-    H5O_obj_create_t *ocrt_info, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id)
+    H5O_obj_create_t *ocrt_info, hid_t lcpl_id)
 {
     char *norm_link_name = NULL;        /* Pointer to normalized link name */
     unsigned target_flags = H5G_TARGET_NORMAL; /* Flags to pass to group traversal function */
@@ -1888,7 +1762,7 @@ H5L_create_real(const H5G_loc_t *link_loc, const char *link_name,
     H5L_trav_cr_t udata;               /* User data for callback */
     herr_t ret_value = SUCCEED;        /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check args */
     HDassert(link_loc);
@@ -1898,7 +1772,7 @@ H5L_create_real(const H5G_loc_t *link_loc, const char *link_name,
 
     /* Get normalized link name */
     if((norm_link_name = H5G_normalize(link_name)) == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "can't normalize name")
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
 
     /* Check for flags present in creation property list */
     if(lcpl_id != H5P_DEFAULT) {
@@ -1920,7 +1794,6 @@ H5L_create_real(const H5G_loc_t *link_loc, const char *link_name,
      * FILE is used to make sure that hard links don't cross files, and
      * should be NULL for other link types.
      * LC_PLIST is a pointer to the link creation property list.
-     * DXPL_ID is the dxpl ID that needs to be used during writes and reads.
      * PATH is a pointer to the path of the object being inserted if this is
      * a hard link; this is used to set the paths to objects when they are
      * created.  For other link types, this is NULL.
@@ -1931,14 +1804,13 @@ H5L_create_real(const H5G_loc_t *link_loc, const char *link_name,
      */
     udata.file = obj_file;
     udata.lc_plist = lc_plist;
-    udata.dxpl_id = dxpl_id;
     udata.path = obj_path;
     udata.ocrt_info = ocrt_info;
     udata.lnk = lnk;
 
     /* Traverse the destination path & create new link */
-    if(H5G_traverse(link_loc, link_name, target_flags, H5L_link_cb, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTINSERT, FAIL, "can't insert link")
+    if(H5G_traverse(link_loc, link_name, target_flags, H5L__link_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTINSERT, FAIL, "can't insert link")
 
 done:
     /* Free the normalized path name */
@@ -1946,7 +1818,7 @@ done:
         H5MM_xfree(norm_link_name);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_create_real() */
+} /* end H5L__create_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -1963,8 +1835,7 @@ done:
  */
 herr_t
 H5L_create_hard(H5G_loc_t *cur_loc, const char *cur_name,
-    const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id,
-    hid_t lapl_id, hid_t dxpl_id)
+    const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id)
 {
     char *norm_cur_name = NULL;	        /* Pointer to normalized current name */
     H5F_t *link_file = NULL;            /* Pointer to file to link to */
@@ -1985,7 +1856,7 @@ H5L_create_hard(H5G_loc_t *cur_loc, const char *cur_name,
 
     /* Get normalized copy of the current name */
     if((norm_cur_name = H5G_normalize(cur_name)) == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "can't normalize name")
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
 
     /* Set up link data specific to hard links */
     lnk.type = H5L_TYPE_HARD;
@@ -1994,8 +1865,8 @@ H5L_create_hard(H5G_loc_t *cur_loc, const char *cur_name,
     obj_loc.path = &path;
     obj_loc.oloc = &oloc;
     H5G_loc_reset(&obj_loc);
-    if(H5G_loc_find(cur_loc, norm_cur_name, &obj_loc, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "source object not found")
+    if(H5G_loc_find(cur_loc, norm_cur_name, &obj_loc) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "source object not found")
     loc_valid = TRUE;
 
     /* Construct link information for eventual insertion */
@@ -2006,14 +1877,14 @@ H5L_create_hard(H5G_loc_t *cur_loc, const char *cur_name,
 
     /* Create actual link to the object.  Pass in NULL for the path, since this
      * function shouldn't change an object's user path. */
-    if(H5L_create_real(link_loc, link_name, NULL, link_file, &lnk, NULL, lcpl_id, lapl_id, dxpl_id) < 0)
+    if(H5L__create_real(link_loc, link_name, NULL, link_file, &lnk, NULL, lcpl_id) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
 
 done:
     /* Free the object header location */
     if(loc_valid)
         if(H5G_loc_free(&obj_loc) < 0)
-            HDONE_ERROR(H5E_SYM, H5E_CANTRELEASE, FAIL, "unable to free location")
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to free location")
 
     /* Free the normalized path name */
     if(norm_cur_name)
@@ -2024,6 +1895,45 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5L__create_hard
+ *
+ * Purpose:     Internal routine to create a hard link
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 25, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__create_hard(H5G_loc_t *cur_loc, const char *cur_name,
+    const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(cur_loc);
+    HDassert(cur_name);
+    HDassert(link_loc);
+    HDassert(link_name);
+
+    /* Create the link */
+    if(H5L_create_hard(cur_loc, cur_name, link_loc, link_name, lcpl_id) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTCREATE, FAIL, "unable to create link")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__create_hard() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5L_create_soft
  *
  * Purpose:	Creates a soft link from LINK_NAME to TARGET_PATH.
@@ -2037,7 +1947,7 @@ done:
  */
 herr_t
 H5L_create_soft(const char *target_path, const H5G_loc_t *link_loc,
-    const char *link_name, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id)
+    const char *link_name, hid_t lcpl_id)
 {
     char *norm_target = NULL;	        /* Pointer to normalized current name */
     H5O_link_t lnk;                     /* Link to insert */
@@ -2052,14 +1962,14 @@ H5L_create_soft(const char *target_path, const H5G_loc_t *link_loc,
 
     /* Get normalized copy of the link target */
     if((norm_target = H5G_normalize(target_path)) == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "can't normalize name")
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
 
     /* Set up link data specific to soft links */
     lnk.type = H5L_TYPE_SOFT;
     lnk.u.soft.name = norm_target;
 
     /* Create actual link to the object */
-    if(H5L_create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id, lapl_id, dxpl_id) < 0)
+    if(H5L__create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
 
 done:
@@ -2072,7 +1982,45 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_create_ud
+ * Function:    H5L__create_soft
+ *
+ * Purpose:     Internal routine to create a soft link
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 25, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__create_soft(const char *target_path, const H5G_loc_t *link_loc,
+    const char *link_name, hid_t lcpl_id)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(target_path);
+    HDassert(link_loc);
+    HDassert(link_name);
+
+    /* Create the link */
+    if(H5L_create_soft(target_path, link_loc, link_name, lcpl_id) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTCREATE, FAIL, "unable to create link")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__create_soft() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__create_ud
  *
  * Purpose:	Creates a user-defined link. See H5Lcreate_ud for
  *              full documentation.
@@ -2085,14 +2033,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5L_create_ud(const H5G_loc_t *link_loc, const char *link_name,
-    const void *ud_data, size_t ud_data_size, H5L_type_t type, hid_t lcpl_id,
-    hid_t lapl_id, hid_t dxpl_id)
+H5L__create_ud(const H5G_loc_t *link_loc, const char *link_name,
+    const void *ud_data, size_t ud_data_size, H5L_type_t type, hid_t lcpl_id)
 {
     H5O_link_t lnk;                     /* Link to insert */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Check args */
     HDassert(type >= H5L_TYPE_UD_MIN && type <= H5L_TYPE_MAX);
@@ -2119,19 +2066,19 @@ H5L_create_ud(const H5G_loc_t *link_loc, const char *link_name,
     lnk.type = type;
 
     /* Create actual link to the object */
-    if(H5L_create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id, lapl_id, dxpl_id) < 0)
+    if(H5L__create_real(link_loc, link_name, NULL, NULL, &lnk, NULL, lcpl_id) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to register new name for object")
 
 done:
     /* Free the link's udata buffer if it's been allocated */
     H5MM_xfree(lnk.u.ud.udata);
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_create_ud() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__create_ud() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_get_val_real
+ * Function:	H5L__get_val_real
  *
  * Purpose:	Retrieve link value from a link object
  *
@@ -2143,11 +2090,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_get_val_real(const H5O_link_t *lnk, void *buf, size_t size)
+H5L__get_val_real(const H5O_link_t *lnk, void *buf, size_t size)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(lnk);
@@ -2183,11 +2130,11 @@ H5L_get_val_real(const H5O_link_t *lnk, void *buf, size_t size)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_get_val_real() */
+} /* end H5L__get_val_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_get_val_cb
+ * Function:	H5L__get_val_cb
  *
  * Purpose:	Callback for retrieving link value or udata.
  *
@@ -2199,20 +2146,20 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_get_val_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
+H5L__get_val_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
     H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
 {
     H5L_trav_gv_t *udata = (H5L_trav_gv_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;               /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid link */
     if(lnk == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "'%s' doesn't exist", name)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "'%s' doesn't exist", name)
 
     /* Retrieve the value for the link */
-    if(H5L_get_val_real(lnk, udata->buf, udata->size) < 0)
+    if(H5L__get_val_real(lnk, udata->buf, udata->size) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't retrieve link value")
 
 done:
@@ -2221,7 +2168,7 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_get_val_cb() */
+} /* end H5L__get_val_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -2244,8 +2191,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5L_get_val(H5G_loc_t *loc, const char *name, void *buf/*out*/, size_t size,
-    hid_t lapl_id, hid_t dxpl_id)
+H5L_get_val(const H5G_loc_t *loc, const char *name, void *buf/*out*/, size_t size)
 {
     H5L_trav_gv_t udata;           /* User data for callback */
     herr_t ret_value = SUCCEED;       /* Return value */
@@ -2261,8 +2207,8 @@ H5L_get_val(H5G_loc_t *loc, const char *name, void *buf/*out*/, size_t size,
     udata.buf = buf;
 
     /* Traverse the group hierarchy to locate the object to get info about */
-    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L_get_val_cb, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "name doesn't exist")
+    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_val_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2270,7 +2216,43 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_get_val_by_idx_cb
+ * Function:    H5L__get_val
+ *
+ * Purpose:     Internal routine to query a link value
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_val(const H5G_loc_t *loc, const char *name, void *buf/*out*/, size_t size)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Get the link value */
+    if(H5L_get_val(loc, name, buf, size) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link value for '%s'", name)
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__get_val() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_val_by_idx_cb
  *
  * Purpose:	Callback for retrieving a link's value according to an
  *              index's order.
@@ -2283,7 +2265,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_get_val_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
+H5L__get_val_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
@@ -2292,20 +2274,19 @@ H5L_get_val_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATT
     hbool_t lnk_copied = FALSE;         /* Whether the link was copied */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name of the group resolved to a valid object */
     if(obj_loc == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
 
     /* Query link */
-    if(H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order,
-                udata->n, &fnd_lnk, udata->dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "link not found")
+    if(H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, &fnd_lnk) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
     lnk_copied = TRUE;
 
     /* Retrieve the value for the link */
-    if(H5L_get_val_real(&fnd_lnk, udata->buf, udata->size) < 0)
+    if(H5L__get_val_real(&fnd_lnk, udata->buf, udata->size) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't retrieve link value")
 
 done:
@@ -2318,11 +2299,57 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_get_val_by_idx_cb() */
+} /* end H5L__get_val_by_idx_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__get_val_by_idx
+ *
+ * Purpose:     Internal routine to query a link value according to the
+ *		index within a group
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_val_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n, void *buf/*out*/, size_t size)
+{
+    H5L_trav_gvbi_t udata;              /* User data for callback */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Set up user data for retrieving information */
+    udata.idx_type = idx_type;
+    udata.order = order;
+    udata.n = n;
+    udata.buf = buf;
+    udata.size = size;
+
+    /* Traverse the group hierarchy to locate the object to get info about */
+    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_val_by_idx_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get link info for index: %llu", (unsigned long long)n)
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__get_val_by_idx() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_delete_cb
+ * Function:	H5L__delete_cb
  *
  * Purpose:	Callback for deleting a link.  This routine
  *              actually deletes the link
@@ -2335,31 +2362,31 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_delete_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
-    H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
+H5L__delete_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
+    H5G_loc_t H5_ATTR_UNUSED *obj_loc, void H5_ATTR_UNUSED *_udata/*in,out*/,
+    H5G_own_loc_t *own_loc/*out*/)
 {
-    H5L_trav_rm_t *udata = (H5L_trav_rm_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the group resolved to a valid link */
     if(grp_loc == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
 
     /* Check if the name in this group resolved to a valid link */
     if(name == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "name doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
 
     /* Check for non-existent (NULL) link.
      * Note that this can also occur when attempting to remove '.'
      */
     if(lnk == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "callback link pointer is NULL (specified link may be '.' or not exist)")
+        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "callback link pointer is NULL (specified link may be '.' or not exist)")
 
     /* Remove the link from the group */
-    if(H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, name, udata->dxpl_id) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTDELETE, FAIL, "unable to remove link from group")
+    if(H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, name) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "unable to remove link from group")
 
 done:
     /* Indicate that this callback didn't take ownership of the group *
@@ -2367,7 +2394,7 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_delete_cb() */
+} /* end H5L__delete_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -2383,9 +2410,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5L_delete(H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id)
+H5L_delete(const H5G_loc_t *loc, const char *name)
 {
-    H5L_trav_rm_t      udata;                  /* User data for callback */
     char		*norm_name = NULL;	/* Pointer to normalized name */
     herr_t              ret_value = SUCCEED;    /* Return value */
 
@@ -2397,12 +2423,11 @@ H5L_delete(H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id)
 
     /* Get normalized copy of the name */
     if((norm_name = H5G_normalize(name)) == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "can't normalize name")
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize name")
 
     /* Set up user data for unlink operation */
-    udata.dxpl_id = dxpl_id;
-    if(H5G_traverse(loc, norm_name, H5G_TARGET_SLINK|H5G_TARGET_UDLINK|H5G_TARGET_MOUNT, H5L_delete_cb, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTREMOVE, FAIL, "can't unlink object")
+    if(H5G_traverse(loc, norm_name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK | H5G_TARGET_MOUNT, H5L__delete_cb, NULL) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTREMOVE, FAIL, "can't unlink object")
 
 done:
     /* Free the normalized path name */
@@ -2414,7 +2439,43 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_delete_by_idx_cb
+ * Function:    H5L__delete
+ *
+ * Purpose:     Internal routine to delete a link
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__delete(const H5G_loc_t *loc, const char *name)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Delete the link */
+    if(H5L_delete(loc, name) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "unable to delete link: %s", name)
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__delete() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__delete_by_idx_cb
  *
  * Purpose:	Callback for removing a link according to an index's order.
  *
@@ -2426,39 +2487,82 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_delete_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
+H5L__delete_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
     H5L_trav_gvbi_t *udata = (H5L_trav_gvbi_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(udata->dxpl_id, (obj_loc) ? (obj_loc->oloc->addr) : HADDR_UNDEF, FAIL)
+    FUNC_ENTER_STATIC_TAG((obj_loc) ? (obj_loc->oloc->addr) : HADDR_UNDEF)
 
     /* Check if the name of the group resolved to a valid object */
     if(obj_loc == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
 
     /* Delete link */
-    if(H5G_obj_remove_by_idx(obj_loc->oloc, obj_loc->path->full_path_r,
-            udata->idx_type, udata->order, udata->n, udata->dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "link not found")
+    if(H5G_obj_remove_by_idx(obj_loc->oloc, obj_loc->path->full_path_r, udata->idx_type, udata->order, udata->n) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
 
 done:
     /* Indicate that this callback didn't take ownership of the group *
      * location for the object */
     *own_loc = H5G_OWN_NONE;
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5L_delete_by_idx_cb() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5L__delete_by_idx_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__delete_by_idx
+ *
+ * Purpose:     Internal routine to delete a link according to its index
+ * 		within a group.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__delete_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n)
+{
+    H5L_trav_rmbi_t udata;              /* User data for callback */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Set up user data for unlink operation */
+    udata.idx_type = idx_type;
+    udata.order = order;
+    udata.n = n;
+
+    /* Traverse the group hierarchy to remove the link */
+    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK | H5G_TARGET_MOUNT, H5L__delete_by_idx_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTDELETE, FAIL, "link doesn't exist")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__delete() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_move_dest_cb
+ * Function:	H5L__move_dest_cb
  *
  * Purpose:	Second callback for moving and renaming an object.  This routine
  *              inserts a new link into the group returned by the traversal.
- *              It is called by H5L_move_cb.
+ *              It is called by H5L__move_cb.
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -2468,7 +2572,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_move_dest_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
+H5L__move_dest_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
@@ -2479,18 +2583,17 @@ H5L_move_dest_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     hbool_t temp_loc_init = FALSE;
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Make sure an object with this name doesn't already exist */
     if(obj_loc != NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "an object with that name already exists")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "an object with that name already exists")
 
     /* Check for crossing file boundaries with a new hard link */
-    if(udata->lnk->type == H5L_TYPE_HARD) {
+    if(udata->lnk->type == H5L_TYPE_HARD)
         /* Check that both objects are in same file */
         if(!H5F_SAME_SHARED(grp_loc->oloc->file, udata->file))
-            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "moving a link across files is not allowed")
-    } /* end if */
+            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "moving a link across files is not allowed")
 
     /* Give the object its new name */
     /* Casting away const okay -JML */
@@ -2498,8 +2601,7 @@ H5L_move_dest_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
     udata->lnk->name = (char *)name;
 
     /* Insert the link into the group */
-    if(H5G_obj_insert(grp_loc->oloc, name, udata->lnk, TRUE, H5O_TYPE_UNKNOWN,
-            NULL, udata->dxpl_id) < 0)
+    if(H5G_obj_insert(grp_loc->oloc, name, udata->lnk, TRUE, H5O_TYPE_UNKNOWN, NULL) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create new link to object")
 
     /* If the link was a user-defined link, call its move callback if it has one */
@@ -2519,17 +2621,17 @@ H5L_move_dest_cb(H5G_loc_t *grp_loc/*in*/, const char *name,
              */
             H5G_name_reset(&temp_path);
             if(H5O_loc_copy(&temp_oloc, grp_loc->oloc, H5_COPY_DEEP) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTCOPY, FAIL, "unable to copy object location")
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object location")
 
             temp_loc.oloc = &temp_oloc;
             temp_loc.path = &temp_path;
             temp_loc_init = TRUE;
 
             /* Set up location for user-defined callback */
-            if((grp = H5G_open(&temp_loc, udata->dxpl_id)) == NULL)
-                HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
+            if(NULL == (grp = H5G_open(&temp_loc)))
+                HGOTO_ERROR(H5E_LINK, H5E_CANTOPENOBJ, FAIL, "unable to open group")
             if((grp_id = H5I_register(H5I_GROUP, grp, TRUE)) < 0)
-                HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register group ID")
+                HGOTO_ERROR(H5E_LINK, H5E_CANTREGISTER, FAIL, "unable to register group ID")
 
             if(udata->copy) {
                 if((link_class->copy_func)(udata->lnk->name, grp_id, udata->lnk->u.ud.udata, udata->lnk->u.ud.size) < 0)
@@ -2546,11 +2648,11 @@ done:
     /* Close the location given to the user callback if it was created */
     if(grp_id >= 0) {
         if(H5I_dec_app_ref(grp_id) < 0)
-            HDONE_ERROR(H5E_ATOM, H5E_CANTRELEASE, FAIL, "unable to close atom from UD callback")
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close atom from UD callback")
     } /* end if */
     else if(grp != NULL) {
         if(H5G_close(grp) < 0)
-            HDONE_ERROR(H5E_FILE, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
+            HDONE_ERROR(H5E_LINK, H5E_CANTRELEASE, FAIL, "unable to close group given to UD callback")
     } /* end if */
     else if(temp_loc_init)
         H5G_loc_free(&temp_loc);
@@ -2564,11 +2666,11 @@ done:
     udata->lnk->name = NULL;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_move_dest_cb() */
+} /* end H5L__move_dest_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_move_cb
+ * Function:	H5L__move_cb
  *
  * Purpose:	Callback for moving and renaming an object.  This routine
  *              replaces the names of open objects with the moved object
@@ -2582,24 +2684,24 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_move_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
+H5L__move_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
     H5G_loc_t *obj_loc, void *_udata/*in,out*/, H5G_own_loc_t *own_loc/*out*/)
 {
     H5L_trav_mv_t *udata = (H5L_trav_mv_t *)_udata;   /* User data passed in */
-    H5L_trav_mv2_t udata_out;           /* User data for H5L_move_dest_cb traversal */
+    H5L_trav_mv2_t udata_out;           /* User data for H5L__move_dest_cb traversal */
     char * orig_name = NULL;            /* The name of the link in this group */
     hbool_t link_copied = FALSE;        /* Has udata_out.lnk been allocated? */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid link */
     if(obj_loc == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "name doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
 
     /* Check for operations on '.' */
     if(lnk == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "the name of a link must be supplied to move or copy")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "the name of a link must be supplied to move or copy")
 
     /* Set up user data for move_dest_cb */
     if(NULL == (udata_out.lnk = (H5O_link_t *)H5O_msg_copy(H5O_LINK_ID, lnk, NULL)))
@@ -2614,15 +2716,19 @@ H5L_move_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
     udata_out.lnk->cset = udata->cset;
     udata_out.file = grp_loc->oloc->file;
     udata_out.copy = udata->copy;
-    udata_out.dxpl_id = udata->dxpl_id;
 
     /* Keep a copy of link's name (it's "owned" by the H5G_traverse() routine) */
     orig_name = H5MM_xstrdup(name);
 
+    /* Reset the # of soft / UD links that can be traversed, so that the second
+     * (destination) traversal has the correct value
+     */
+    if(H5CX_set_nlinks(udata->orig_nlinks) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't reset # of soft / UD links to traverse")
+
     /* Insert the link into its new location */
-    if(H5G_traverse(udata->dst_loc, udata->dst_name, udata->dst_target_flags,
-            H5L_move_dest_cb, &udata_out, udata->lapl_id, udata->dxpl_id) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to follow symbolic link")
+    if(H5G_traverse(udata->dst_loc, udata->dst_name, udata->dst_target_flags, H5L__move_dest_cb, &udata_out) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to follow symbolic link")
 
     /* If this is a move and not a copy operation, change the object's name and remove the old link */
     if(!udata->copy) {
@@ -2635,7 +2741,7 @@ H5L_move_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
             /* Create reference counted string for full dst path */
             if((dst_name_r = H5G_build_fullpath_refstr_str(udata->dst_loc->path->full_path_r,
                     udata->dst_name)) == NULL)
-                HGOTO_ERROR(H5E_SYM, H5E_PATH, FAIL, "can't build destination path name")
+                HGOTO_ERROR(H5E_LINK, H5E_PATH, FAIL, "can't build destination path name")
         } /* end if */
         else
             dst_name_r = H5RS_wrap(udata->dst_name);
@@ -2643,15 +2749,15 @@ H5L_move_cb(H5G_loc_t *grp_loc/*in*/, const char *name, const H5O_link_t *lnk,
 
         /* Fix names up */
         if(H5G_name_replace(lnk, H5G_NAME_MOVE, obj_loc->oloc->file, obj_loc->path->full_path_r,
-                udata->dst_loc->oloc->file, dst_name_r, udata->dxpl_id) < 0) {
+                udata->dst_loc->oloc->file, dst_name_r) < 0) {
             H5RS_decr(dst_name_r);
-            HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to replace name")
+            HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to replace name")
         } /* end if */
 
         /* Remove the old link */
-        if(H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, orig_name, udata->dxpl_id) < 0) {
+        if(H5G_obj_remove(grp_loc->oloc, grp_loc->path->full_path_r, orig_name) < 0) {
             H5RS_decr(dst_name_r);
-            HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to remove old name")
+            HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to remove old name")
         } /* end if */
 
         H5RS_decr(dst_name_r);
@@ -2663,7 +2769,7 @@ done:
         H5MM_xfree(orig_name);
 
     /* If udata_out.lnk was copied, free any memory allocated
-     * In this special case, the H5L_move_dest_cb callback resets the name
+     * In this special case, the H5L__move_dest_cb callback resets the name
      * so H5O_msg_free shouldn't try to free it
      */
     if(link_copied)
@@ -2674,7 +2780,7 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_move_cb() */
+} /* end H5L__move_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -2698,19 +2804,16 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5L_move(H5G_loc_t *src_loc, const char *src_name, H5G_loc_t *dst_loc,
-    const char *dst_name, hbool_t copy_flag, hid_t lcpl_id, hid_t lapl_id,
-    hid_t dxpl_id)
+H5L_move(const H5G_loc_t *src_loc, const char *src_name, const H5G_loc_t *dst_loc,
+    const char *dst_name, hbool_t copy_flag, hid_t lcpl_id)
 {
     unsigned    dst_target_flags = H5G_TARGET_NORMAL;
     H5T_cset_t char_encoding = H5F_DEFAULT_CSET; /* Character encoding for link */
     H5P_genplist_t* lc_plist;           /* Link creation property list */
-    H5P_genplist_t* la_plist;           /* Link access property list */
     H5L_trav_mv_t      udata;          /* User data for traversal */
-    hid_t               lapl_copy;      /* Copy of lapl for this function */
     herr_t              ret_value = SUCCEED;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity check */
     HDassert(src_loc);
@@ -2738,31 +2841,22 @@ H5L_move(H5G_loc_t *src_loc, const char *src_name, H5G_loc_t *dst_loc,
             HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get property value for character encoding")
     } /* end if */
 
-    /* Copy the link access property list because traversing UD links will
-     * decrease the NLINKS property. HDF5 should have NLINKS traversals to
-     * get to the source and NLINKS more to get to the destination. */
-    if(lapl_id == H5P_DEFAULT)
-        lapl_copy = lapl_id;
-    else {
-        if(NULL == (la_plist = (H5P_genplist_t *)H5I_object(lapl_id)))
-            HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a valid access PL")
-        if((lapl_copy = H5P_copy_plist(la_plist, FALSE)) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "unable to copy access properties")
-    } /* end else */
-
     /* Set up user data */
     udata.dst_loc = dst_loc;
     udata.dst_name= dst_name;
     udata.dst_target_flags = dst_target_flags;
     udata.cset = char_encoding;
     udata.copy = copy_flag;
-    udata.lapl_id = lapl_copy;
-    udata.dxpl_id = dxpl_id;
+
+    /* Retrieve the original # of soft / UD links that can be traversed, so
+     *  that the countdown can be reset after the first path is traversed.
+     */
+    if(H5CX_get_nlinks(&udata.orig_nlinks) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to retrieve # of soft / UD links to traverse")
 
     /* Do the move */
-    if(H5G_traverse(src_loc, src_name, H5G_TARGET_MOUNT | H5G_TARGET_SLINK | H5G_TARGET_UDLINK,
-            H5L_move_cb, &udata, lapl_id, dxpl_id) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "unable to find link")
+    if(H5G_traverse(src_loc, src_name, H5G_TARGET_MOUNT | H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__move_cb, &udata) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "unable to find link")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2770,6 +2864,45 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5L__move
+ *
+ * Purpose:     Internal routine to move / copy a link
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 25, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__move(const H5G_loc_t *src_loc, const char *src_name, H5G_loc_t *dst_loc,
+    const char *dst_name, hbool_t copy_flag, hid_t lcpl_id)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(src_loc);
+    HDassert(src_name);
+    HDassert(dst_loc);
+    HDassert(dst_name);
+
+    /* Move the link */
+    if(H5L_move(src_loc, src_name, dst_loc, dst_name, copy_flag, lcpl_id) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTMOVE, FAIL, "unable to move link")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__move() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5L__exists_final_cb
  *
  * Purpose:	Callback for checking whether a link exists, as the final
@@ -2844,8 +2977,8 @@ H5L__exists_inter_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR
                 } while('/' == *udata->sep);
                 cb_func = H5L__exists_inter_cb;
             } /* end else */
-            if(H5G_traverse(obj_loc, next, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, udata, udata->lapl_id, udata->dxpl_id) < 0)
-                HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't determine if link exists")
+            if(H5G_traverse(obj_loc, next, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, udata) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't determine if link exists")
         } /* end if */
         else
             udata->exists = TRUE;
@@ -2878,7 +3011,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5L_exists_tolerant(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id)
+H5L_exists_tolerant(const H5G_loc_t *loc, const char *name)
 {
     H5L_trav_le_t udata;        /* User data for traversal */
     H5G_traverse_t cb_func;     /* Callback function for tranversal */
@@ -2902,8 +3035,6 @@ H5L_exists_tolerant(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t
         HGOTO_DONE(TRUE)
 
     /* Set up user data & correct callback */
-    udata.lapl_id = lapl_id;
-    udata.dxpl_id = dxpl_id;
     udata.exists = FALSE;
     if(NULL == (udata.sep = HDstrchr(name_trav, '/')))
         cb_func = H5L__exists_final_cb;
@@ -2917,8 +3048,8 @@ H5L_exists_tolerant(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t
     } /* end else */
 
     /* Traverse the group hierarchy to locate the link to check */
-    if(H5G_traverse(loc, name_trav, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTGET, FAIL, "can't determine if link exists")
+    if(H5G_traverse(loc, name_trav, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, cb_func, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't determine if link exists")
 
     /* Set return value */
     ret_value = (htri_t)udata.exists;
@@ -2946,13 +3077,13 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-static htri_t
-H5L__exists(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id)
+htri_t
+H5L__exists(const H5G_loc_t *loc, const char *name)
 {
     H5L_trav_le_t udata;        /* User data for traversal */
     htri_t ret_value = FAIL;    /* Return value */
 
-    FUNC_ENTER_STATIC
+    FUNC_ENTER_STATIC_VOL
 
     /* A path of "/" will always exist in a file */
     if(0 == HDstrcmp(name, "/"))
@@ -2960,19 +3091,19 @@ H5L__exists(const H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id
 
     /* Traverse the group hierarchy to locate the object to get info about */
     udata.exists = FALSE;
-    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__exists_final_cb, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_EXISTS, FAIL, "path doesn't exist")
+    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__exists_final_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "path doesn't exist")
 
     /* Set return value */
     ret_value = (htri_t)udata.exists;
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* H5L__exists() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_get_info_cb
+ * Function:	H5L__get_info_cb
  *
  * Purpose:	Callback for retrieving a link's metadata
  *
@@ -2984,18 +3115,18 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_get_info_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
+H5L__get_info_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
     const H5O_link_t *lnk, H5G_loc_t H5_ATTR_UNUSED *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
     H5L_trav_gi_t *udata = (H5L_trav_gi_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name in this group resolved to a valid link */
     if(lnk == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "name doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "name doesn't exist")
 
     /* Get information from the link */
     if(H5G_link_to_info(lnk, udata->linfo) < 0)
@@ -3007,7 +3138,7 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_get_info_cb() */
+} /* end H5L__get_info_cb() */
 
 
 /*-------------------------------------------------------------------------
@@ -3023,8 +3154,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5L_get_info(const H5G_loc_t *loc, const char *name,
-    H5L_info_t *linfo/*out*/, hid_t lapl_id, hid_t dxpl_id)
+H5L_get_info(const H5G_loc_t *loc, const char *name, H5L_info_t *linfo/*out*/)
 {
     H5L_trav_gi_t udata;               /* User data for callback */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -3032,11 +3162,10 @@ H5L_get_info(const H5G_loc_t *loc, const char *name,
     FUNC_ENTER_NOAPI(FAIL)
 
     udata.linfo = linfo;
-    udata.dxpl_id = dxpl_id;
 
     /* Traverse the group hierarchy to locate the object to get info about */
-    if(H5G_traverse(loc, name, H5G_TARGET_SLINK|H5G_TARGET_UDLINK, H5L_get_info_cb, &udata, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_EXISTS, FAIL, "name doesn't exist")
+    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_info_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_EXISTS, FAIL, "name doesn't exist")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -3044,7 +3173,43 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_get_info_by_idx_cb
+ * Function:    H5L__get_info
+ *
+ * Purpose:     Internal routine to retrieve link info
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__get_info(const H5G_loc_t *loc, const char *name, H5L_info_t *linfo/*out*/)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Get the link information */
+    if(H5L_get_info(loc, name, linfo) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link info for: '%s'", name)
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__get_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5L__get_info_by_idx_cb
  *
  * Purpose:	Callback for retrieving a link's metadata according to an
  *              index's order.
@@ -3057,7 +3222,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_get_info_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
+H5L__get_info_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
@@ -3066,16 +3231,15 @@ H5L_get_info_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_AT
     hbool_t lnk_copied = FALSE;         /* Whether the link was copied */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name of the group resolved to a valid object */
     if(obj_loc == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
 
     /* Query link */
-    if(H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order,
-                udata->n, &fnd_lnk, udata->dxpl_id) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "link not found")
+    if(H5G_obj_lookup_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, &fnd_lnk) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
     lnk_copied = TRUE;
 
     /* Get information from the link */
@@ -3092,39 +3256,57 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_get_info_by_idx_cb() */
+} /* end H5L__get_info_by_idx_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_get_default_lcpl
+ * Function:    H5L__get_info_by_idx
  *
- * Purpose:	Accessor for the default Link Creation Property List
+ * Purpose:     Internal routine to retrieve link info according to an
+ *              index's order.
  *
- * Return:	Success:	ID of the deafult lcpl
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
  *
- * 		Failure:	Negative
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
  *
- * Programmer:	James Laird
- *              Tuesday, July 4, 2006
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
  *
  *-------------------------------------------------------------------------
  */
-hid_t
-H5L_get_default_lcpl(void)
+static herr_t
+H5L__get_info_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n, H5L_info_t *linfo /*out*/)
 {
-    hid_t ret_value = H5I_INVALID_HID;          /* Return value */
+    H5L_trav_gibi_t udata;              /* User data for callback */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC_VOL
 
-    ret_value = H5P_LINK_CREATE_DEFAULT;
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+    HDassert(linfo);
+
+    /* Set up user data for callback */
+    udata.idx_type = idx_type;
+    udata.order = order;
+    udata.n = n;
+    udata.linfo = linfo;
+
+    /* Traverse the group hierarchy to locate the object to get info about */
+    if(H5G_traverse(loc, name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_info_by_idx_cb, &udata) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to get link info")
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5L_get_default_lcpl */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__get_info_by_idx() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_get_name_by_idx_cb
+ * Function:	H5L__get_name_by_idx_cb
  *
  * Purpose:	Callback for retrieving a link's name according to an
  *              index's order.
@@ -3137,23 +3319,22 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5L_get_name_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
+H5L__get_name_by_idx_cb(H5G_loc_t H5_ATTR_UNUSED *grp_loc/*in*/, const char H5_ATTR_UNUSED *name,
     const H5O_link_t H5_ATTR_UNUSED *lnk, H5G_loc_t *obj_loc, void *_udata/*in,out*/,
     H5G_own_loc_t *own_loc/*out*/)
 {
     H5L_trav_gnbi_t *udata = (H5L_trav_gnbi_t *)_udata;   /* User data passed in */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check if the name of the group resolved to a valid object */
     if(obj_loc == NULL)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "group doesn't exist")
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "group doesn't exist")
 
     /* Query link */
-    if((udata->name_len = H5G_obj_get_name_by_idx(obj_loc->oloc, udata->idx_type, udata->order,
-                udata->n, udata->name, udata->size, udata->dxpl_id)) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "link not found")
+    if((udata->name_len = H5G_obj_get_name_by_idx(obj_loc->oloc, udata->idx_type, udata->order, udata->n, udata->name, udata->size)) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_NOTFOUND, FAIL, "link not found")
 
 done:
     /* Indicate that this callback didn't take ownership of the group *
@@ -3161,11 +3342,151 @@ done:
     *own_loc = H5G_OWN_NONE;
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_get_name_by_idx_cb() */
+} /* end H5L__get_name_by_idx_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__get_name_by_idx
+ *
+ * Purpose:     Internal routine to retrieve link name according to an
+ *              index's order.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static ssize_t
+H5L__get_name_by_idx(const H5G_loc_t *loc, const char *group_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, char *name /*out*/,
+    size_t size)
+{
+    H5L_trav_gnbi_t udata;      /* User data for callback */
+    ssize_t ret_value = FAIL;   /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(group_name && *group_name);
+
+    /* Set up user data for callback */
+    udata.idx_type = idx_type;
+    udata.order = order;
+    udata.n = n;
+    udata.name = name;
+    udata.size = size;
+    udata.name_len = -1;
+
+    /* Traverse the group hierarchy to locate the link to get name of */
+    if(H5G_traverse(loc, group_name, H5G_TARGET_SLINK | H5G_TARGET_UDLINK, H5L__get_name_by_idx_cb, &udata) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get name")
+
+    /* Set the return value */
+    ret_value = udata.name_len;
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__get_name_by_idx() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__iterate
+ *
+ * Purpose:     Internal routine to iterate over links
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 27, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__iterate(hid_t grp_id, const char *group_name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t *idx_p, H5L_iterate_t op, void *op_data)
+{
+    H5G_link_iterate_t  lnk_op;         /* Link operator                    */
+    hsize_t             last_lnk;       /* Index of last object looked at   */
+    hsize_t	        idx;            /* Internal location to hold index  */
+    herr_t              ret_value = FAIL; /* Return value                     */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(group_name);
+    HDassert(op);
+
+    /* Set up iteration beginning/end info */
+    idx = (idx_p == NULL ? 0 : *idx_p);
+    last_lnk = 0;
+
+    /* Build link operator info */
+    lnk_op.op_type = H5G_LINK_OP_NEW;
+    lnk_op.op_func.op_new = op;
+
+    /* Iterate over the links */
+    if((ret_value = H5G_iterate(grp_id, group_name, idx_type, order, idx, &last_lnk, &lnk_op, op_data)) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link iteration failed")
+
+    /* Set the index we stopped at */
+    if(idx_p)
+        *idx_p = last_lnk;
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__iterate() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5L__visit
+ *
+ * Purpose:     Internal routine to visit links
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5L__visit(hid_t grp_id, const char *group_name, H5_index_t idx_type,
+    H5_iter_order_t order, H5L_iterate_t op, void *op_data)
+{
+    herr_t ret_value = FAIL;    /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(group_name);
+    HDassert(op);
+
+    /* Call internal group visitation routine */
+    if((ret_value = H5G_visit(grp_id, group_name, idx_type, order, op, op_data)) < 0)
+	HGOTO_ERROR(H5E_LINK, H5E_BADITER, FAIL, "link visitation failed")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5L__visit() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5L_link_copy_file
+ * Function:	H5L__link_copy_file
  *
  * Purpose:     Copy a link and the object it points to from one file to
  *              another.
@@ -3179,7 +3500,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5L_link_copy_file(H5F_t *dst_file, hid_t dxpl_id, const H5O_link_t *_src_lnk,
+H5L__link_copy_file(H5F_t *dst_file, const H5O_link_t *_src_lnk,
     const H5O_loc_t *src_oloc, H5O_link_t *dst_lnk, H5O_copy_t *cpy_info)
 {
     H5O_link_t tmp_src_lnk;             /* Temporary copy of src link, when needed */
@@ -3191,7 +3512,7 @@ H5L_link_copy_file(H5F_t *dst_file, hid_t dxpl_id, const H5O_link_t *_src_lnk,
     H5O_loc_t tmp_src_oloc;             /* Object location for target object */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check arguments */
     HDassert(dst_file);
@@ -3213,27 +3534,25 @@ H5L_link_copy_file(H5F_t *dst_file, hid_t dxpl_id, const H5O_link_t *_src_lnk,
         lnk_grp_loc.oloc = (H5O_loc_t *)src_oloc;    /* Casting away const OK -QAK */
 
         /* Check if the target object exists */
-        if((tar_exists = H5G_loc_exists(&lnk_grp_loc, src_lnk->name, H5P_DEFAULT,
-                dxpl_id)) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to check if target object exists")
+        if((tar_exists = H5G_loc_exists(&lnk_grp_loc, src_lnk->name)) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to check if target object exists")
 
         if(tar_exists) {
             /* Make a temporary copy of the link, so that it will not change the
              * info in the cache when we change it to a hard link */
             if(NULL == H5O_msg_copy(H5O_LINK_ID, src_lnk, &tmp_src_lnk))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy message")
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy message")
 
             /* Set up group location for target object.  Let H5G_traverse expand
              * the link. */
             tmp_src_loc.path = &tmp_src_path;
             tmp_src_loc.oloc = &tmp_src_oloc;
             if(H5G_loc_reset(&tmp_src_loc) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to reset location")
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to reset location")
 
             /* Find the target object */
-            if(H5G_loc_find(&lnk_grp_loc, src_lnk->name, &tmp_src_loc,
-                    H5P_DEFAULT, dxpl_id) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to find target object")
+            if(H5G_loc_find(&lnk_grp_loc, src_lnk->name, &tmp_src_loc) < 0)
+                HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to find target object")
             expanded_link_open = TRUE;
 
             /* Convert symbolic link to hard link */
@@ -3250,7 +3569,7 @@ H5L_link_copy_file(H5F_t *dst_file, hid_t dxpl_id, const H5O_link_t *_src_lnk,
 
     /* Copy src link information to dst link information */
     if(NULL == H5O_msg_copy(H5O_LINK_ID, src_lnk, dst_lnk))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy message")
+        HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy message")
     dst_lnk_init = TRUE;
 
     /* Check if object in source group is a hard link & copy it */
@@ -3272,9 +3591,8 @@ H5L_link_copy_file(H5F_t *dst_file, hid_t dxpl_id, const H5O_link_t *_src_lnk,
         /* Copy the shared object from source to destination */
         /* Don't care about obj_type or udata because those are only important
          * for old style groups */
-        if(H5O_copy_header_map(&tmp_src_oloc, &new_dst_oloc, dxpl_id, cpy_info,
-                TRUE, NULL, NULL) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
+        if(H5O_copy_header_map(&tmp_src_oloc, &new_dst_oloc, cpy_info, TRUE, NULL, NULL) < 0)
+            HGOTO_ERROR(H5E_LINK, H5E_CANTCOPY, FAIL, "unable to copy object")
 
         /* Copy new destination object's information for eventual insertion */
         dst_lnk->u.hard.addr = new_dst_oloc.addr;
@@ -3292,8 +3610,8 @@ done:
     /* Check if we need to free the temp source oloc */
     if(expanded_link_open)
         if(H5G_loc_free(&tmp_src_loc) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free object")
+            HDONE_ERROR(H5E_LINK, H5E_CANTFREE, FAIL, "unable to free object")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_link_copy_file() */
+} /* end H5L__link_copy_file() */
 
diff --git a/src/H5Lexternal.c b/src/H5Lexternal.c
index 7f59e50..7c32309 100644
--- a/src/H5Lexternal.c
+++ b/src/H5Lexternal.c
@@ -5,19 +5,17 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
 /* Module Setup */
 /****************/
 
-#define H5G_FRIEND		/*suppress error about including H5Gpkg   */
+#define H5G_FRIEND        /*suppress error about including H5Gpkg   */
 #include "H5Lmodule.h"          /* This source code file is part of the H5L module */
 
 
@@ -26,9 +24,11 @@
 /***********/
 #include "H5private.h"          /* Generic Functions                    */
 #include "H5ACprivate.h"        /* Metadata cache                       */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"         /* Error handling                       */
+#include "H5Fprivate.h"         /* Files                                */
 #include "H5Gpkg.h"             /* Groups                               */
-#include "H5Iprivate.h"		/* IDs					*/
+#include "H5Iprivate.h"         /* IDs                                  */
 #include "H5Lpkg.h"             /* Links                                */
 #include "H5MMprivate.h"        /* Memory management                    */
 #include "H5Opublic.h"          /* File objects                         */
@@ -57,10 +57,9 @@
 /********************/
 /* Local Prototypes */
 /********************/
-
-static hid_t H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
-    const void *udata, size_t H5_ATTR_UNUSED udata_size, hid_t lapl_id);
-static ssize_t H5L_extern_query(const char H5_ATTR_UNUSED * link_name, const void *udata,
+static hid_t H5L__extern_traverse(const char *link_name, hid_t cur_group,
+    const void *udata, size_t udata_size, hid_t lapl_id, hid_t dxpl_id);
+static ssize_t H5L__extern_query(const char *link_name, const void *udata,
     size_t udata_size, void * buf /*out*/, size_t buf_size);
 
 
@@ -81,92 +80,20 @@ static ssize_t H5L_extern_query(const char H5_ATTR_UNUSED * link_name, const voi
 /* Default External Link link class */
 static const H5L_class_t H5L_EXTERN_LINK_CLASS[1] = {{
     H5L_LINK_CLASS_T_VERS,      /* H5L_class_t version            */
-    H5L_TYPE_EXTERNAL,		/* Link type id number            */
+    H5L_TYPE_EXTERNAL,        /* Link type id number            */
     "external",                 /* Link name for debugging        */
     NULL,                       /* Creation callback              */
     NULL,                       /* Move callback                  */
     NULL,                       /* Copy callback                  */
-    H5L_extern_traverse,        /* The actual traversal function  */
+    H5L__extern_traverse,       /* The actual traversal function  */
     NULL,                       /* Deletion callback              */
-    H5L_extern_query            /* Query callback                 */
+    H5L__extern_query           /* Query callback                 */
 }};
 
-
-
-/*--------------------------------------------------------------------------
- * Function: H5L_getenv_prefix_name --
- *
- * Purpose:  Get the first pathname in the list of pathnames stored in ENV_PREFIX,
- *           which is separated by the environment delimiter.
- *           ENV_PREFIX is modified to point to the remaining pathnames
- *           in the list.
- *
- * Return:   A pointer to a pathname
- *
- * Programmer:	Vailin Choi, April 2, 2008
- *
---------------------------------------------------------------------------*/
-static char *
-H5L_getenv_prefix_name(char **env_prefix/*in,out*/)
-{
-    char        *retptr=NULL;
-    char        *strret=NULL;
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    strret = HDstrchr(*env_prefix, H5_COLON_SEPC);
-    if (strret == NULL) {
-        retptr = *env_prefix;
-        *env_prefix = strret;
-    } else {
-        retptr = *env_prefix;
-        *env_prefix = strret + 1;
-        *strret = '\0';
-    }
-
-    FUNC_LEAVE_NOAPI(retptr)
-} /* end H5L_getenv_prefix_name() */
-
-
-/*--------------------------------------------------------------------------
- * Function: H5L_build_name
- *
- * Purpose:  Prepend PREFIX to FILE_NAME and store in FULL_NAME
- *
- * Return:   Non-negative on success/Negative on failure
- *
- * Programmer:	Vailin Choi, April 2, 2008
- *
---------------------------------------------------------------------------*/
-static herr_t
-H5L_build_name(char *prefix, char *file_name, char **full_name/*out*/)
-{
-    size_t      prefix_len;             /* length of prefix */
-    size_t      fname_len;              /* Length of external link file name */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    prefix_len = HDstrlen(prefix);
-    fname_len = HDstrlen(file_name);
-
-    /* Allocate a buffer to hold the filename + prefix + possibly the delimiter + terminating null byte */
-    if(NULL == (*full_name = (char *)H5MM_malloc(prefix_len + fname_len + 2)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate filename buffer")
-
-    /* Compose the full file name */
-    HDsnprintf(*full_name, (prefix_len + fname_len + 2), "%s%s%s", prefix,
-        (H5_CHECK_DELIMITER(prefix[prefix_len - 1]) ? "" : H5_DIR_SEPS), file_name);
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5L_build_name() */
-
-
 /*-------------------------------------------------------------------------
- * Function:	H5L_extern_traverse
+ * Function:	H5L__extern_traverse
  *
- * Purpose:	Default traversal function for external links. This can
+ * Purpose:    Default traversal function for external links. This can
  *              be overridden using H5Lregister().
  *
  *              Given a filename and path packed into the link udata,
@@ -175,40 +102,24 @@ done:
  *              link access property list, appends that prefix to the
  *              filename being opened.
  *
- * Return:	ID of the opened object on success/Negative on failure
+ * Return:    ID of the opened object on success/Negative on failure
  *
- * Programmer:	James Laird
+ * Programmer:    James Laird
  *              Monday, July 10, 2006
- * Modifications:
- *		Vailin Choi, April 2, 2008
- *		Add handling to search for the target file
- *		See description in RM: H5Lcreate_external
- *
- *		Vailin Choi; Sept. 12th, 2008; bug #1247
- *		Retrieve the file access property list identifer that is set
- *		for link access property via H5Pget_elink_fapl().
- *		If the return value is H5P_DEFAULT, the parent's file access
- *		property is used to H5F_open() the target file;
- *		Otherwise, the file access property retrieved from H5Pget_elink_fapl()
- *		is used to H5F_open() the target file.
- *
- *		Vailin Choi; Nov 2010
- *		Free memory pointed to by tmp_env_prefix for HDF5_EXT_PREFIX case.
  *
  *-------------------------------------------------------------------------
  */
 static hid_t
-H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
-    const void *_udata, size_t H5_ATTR_UNUSED udata_size, hid_t lapl_id)
+H5L__extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
+    const void *_udata, size_t H5_ATTR_UNUSED udata_size, hid_t lapl_id,
+    hid_t H5_ATTR_UNUSED dxpl_id)
 {
     H5P_genplist_t *plist;              /* Property list pointer */
-    char       *my_prefix;              /* Library's copy of the prefix */
     H5G_loc_t   root_loc;               /* Location of root group in external file */
     H5G_loc_t   loc;                    /* Location of object */
-    H5F_t	*ext_file = NULL;	/* File struct for external file */
+    H5F_t    *ext_file = NULL;    /* File struct for external file */
     const uint8_t *p = (const uint8_t *)_udata;  /* Pointer into external link buffer */
     const char *file_name;              /* Name of file containing external link's object */
-    char *full_name = NULL;             /* File name with prefix */
     const char  *obj_name;              /* Name external link's object */
     size_t      fname_len;              /* Length of external link file name */
     unsigned    intent;                 /* File access permissions */
@@ -217,15 +128,12 @@ H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
     hid_t       ext_obj = -1;           /* ID for external link's object */
     char        *parent_group_name = NULL;/* Temporary pointer to group name */
     char        local_group_name[H5L_EXT_TRAVERSE_BUF_SIZE];  /* Local buffer to hold group name */
-    char        *temp_file_name = NULL; /* Temporary pointer to file name */
-    size_t      temp_file_name_len;     /* Length of temporary file name */
-    char        *actual_file_name = NULL; /* Parent file's actual name */
     H5P_genplist_t  *fa_plist;          /* File access property list pointer */
     H5F_close_degree_t 	fc_degree = H5F_CLOSE_WEAK;  /* File close degree for target file */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
+    char        *elink_prefix;          /* Pointer to elink prefix */
     hid_t ret_value = H5I_INVALID_HID;  /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(p);
@@ -246,10 +154,6 @@ H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
     if(NULL == (plist = H5P_object_verify(lapl_id, H5P_LINK_ACCESS)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, cur_group, FALSE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
     /* Get the fapl_id set for lapl_id if any */
     if(H5P_get(plist, H5L_ACS_ELINK_FAPL_NAME, &fapl_id) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get fapl for links")
@@ -268,7 +172,7 @@ H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
         intent = H5F_INTENT(loc.oloc->file);
 
     if((fapl_id == H5P_DEFAULT) && ((fapl_id = H5F_get_access_plist(loc.oloc->file, FALSE)) < 0))
-	HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get parent's file access property list")
+        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't get parent's file access property list")
 
     /* Get callback_info */
     if(H5P_get(plist, H5L_ACS_ELINK_CB_NAME, &cb_info) < 0)
@@ -276,7 +180,7 @@ H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
 
     /* Get file access property list */
     if(NULL == (fa_plist = H5P_object_verify(fapl_id, H5P_FILE_ACCESS)))
-	HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
     /* Make callback if it exists */
     if(cb_info.func) {
@@ -287,7 +191,7 @@ H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
         parent_file_name = H5F_OPEN_NAME(loc.oloc->file);
 
         /* Query length of parent group name */
-        if((group_name_len = H5G_get_name(&loc, NULL, (size_t) 0, NULL, lapl_id, dxpl_id)) < 0)
+        if((group_name_len = H5G_get_name(&loc, NULL, (size_t) 0, NULL)) < 0)
             HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to retrieve length of group name")
 
         /* Account for null terminator */
@@ -302,7 +206,7 @@ H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
             parent_group_name = local_group_name;
 
         /* Get parent group name */
-        if(H5G_get_name(&loc, parent_group_name, (size_t) group_name_len, NULL, lapl_id, dxpl_id) < 0)
+        if(H5G_get_name(&loc, parent_group_name, (size_t) group_name_len, NULL) < 0)
             HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "unable to retrieve group name")
 
         /* Make callback */
@@ -316,151 +220,23 @@ H5L_extern_traverse(const char H5_ATTR_UNUSED *link_name, hid_t cur_group,
 
     /* Set file close degree for new file to "weak" */
     if(H5P_set(fa_plist, H5F_ACS_CLOSE_DEGREE_NAME, &fc_degree) < 0)
-	HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file close degree")
-
-    /*
-     * Start searching for the target file
-     */
-
-    /* Simplify intent flags for open calls */
-    intent &= (H5F_ACC_RDWR | H5F_ACC_SWMR_WRITE | H5F_ACC_SWMR_READ);
-
-    /* Copy the file name to use */
-    if(NULL == (temp_file_name = H5MM_strdup(file_name)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-    temp_file_name_len = HDstrlen(temp_file_name);
-
-    /* target file_name is an absolute pathname: see RM for detailed description */
-    if(H5_CHECK_ABSOLUTE(file_name) || H5_CHECK_ABS_PATH(file_name)) {
-        /* Try opening file */
-        if(NULL == (ext_file = H5F_efc_open(loc.oloc->file, file_name, intent, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id))) {
-            char *ptr;
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set file close degree")
 
-            H5E_clear_stack(NULL);
-
-            /* get last component of file_name */
-	    H5_GET_LAST_DELIMITER(file_name, ptr)
-	    HDassert(ptr);
-
-            /* Increment past delimiter */
-            ptr++;
-
-            /* Copy into the temp. file name */
-	    HDstrncpy(temp_file_name, ptr, temp_file_name_len);
-            temp_file_name[temp_file_name_len - 1] = '\0';
-        } /* end if */
-    } /* end if */
-    else if(H5_CHECK_ABS_DRIVE(file_name)) {
-        /* Try opening file */
-        if(NULL == (ext_file = H5F_efc_open(loc.oloc->file, file_name, intent, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id))) {
-
-            H5E_clear_stack(NULL);
-
-	    /* strip "<drive-letter>:" */
-	    HDstrncpy(temp_file_name, &file_name[2], temp_file_name_len);
-            temp_file_name[temp_file_name_len - 1] = '\0';
-	} /* end if */
-    } /* end if */
-
-    /* try searching from paths set in the environment variable */
-    if(ext_file == NULL) {
-        char *env_prefix;
-
-        if(NULL != (env_prefix = HDgetenv("HDF5_EXT_PREFIX"))) {
-            char *tmp_env_prefix, *saved_env;
-
-            if(NULL == (saved_env = tmp_env_prefix = H5MM_strdup(env_prefix)))
-                HGOTO_ERROR(H5E_LINK, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-            while((tmp_env_prefix) && (*tmp_env_prefix)) {
-                char *out_prefix_name;
-
-                out_prefix_name = H5L_getenv_prefix_name(&tmp_env_prefix/*in,out*/);
-                if(out_prefix_name && (*out_prefix_name)) {
-                    if(H5L_build_name(out_prefix_name, temp_file_name, &full_name/*out*/) < 0) {
-			saved_env = (char *)H5MM_xfree(saved_env);
-                        HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't prepend prefix to filename")
-		    } /* end if */
-
-                    ext_file = H5F_efc_open(loc.oloc->file, full_name, intent, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id);
-                    full_name = (char *)H5MM_xfree(full_name);
-                    if(ext_file != NULL)
-                        break;
-                    H5E_clear_stack(NULL);
-                } /* end if */
-            } /* end while */
-	    saved_env = (char *)H5MM_xfree(saved_env);
-        } /* end if */
-    } /* end if */
-
-    /* try searching from property list */
-    if(ext_file == NULL) {
-        if(H5P_peek(plist, H5L_ACS_ELINK_PREFIX_NAME, &my_prefix) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get external link prefix")
-        if(my_prefix) {
-            if(H5L_build_name(my_prefix, temp_file_name, &full_name/*out*/) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't prepend prefix to filename")
-            if(NULL == (ext_file = H5F_efc_open(loc.oloc->file, full_name, intent, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id)))
-                H5E_clear_stack(NULL);
-            full_name = (char *)H5MM_xfree(full_name);
-        } /* end if */
-    } /* end if */
-
-    /* try searching from main file's "extpath": see description in H5F_open() & H5_build_extpath() */
-    if(ext_file == NULL) {
-        char *extpath;
-
-        if(NULL != (extpath = H5F_EXTPATH(loc.oloc->file))) {
-            if(H5L_build_name(extpath, temp_file_name, &full_name/*out*/) < 0)
-                HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't prepend prefix to filename")
-            if(NULL == (ext_file = H5F_efc_open(loc.oloc->file, full_name, intent, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id)))
-                H5E_clear_stack(NULL);
-            full_name = (char *)H5MM_xfree(full_name);
-        } /* end if */
-    } /* end if */
-
-    /* try the relative file_name stored in temp_file_name */
-    if(ext_file == NULL) {
-        if(NULL == (ext_file = H5F_efc_open(loc.oloc->file, temp_file_name, intent, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id)))
-            H5E_clear_stack(NULL);
-    } /* end if */
-
-    /* try the 'resolved' name for the parent file (i.e. the name after symlinks
-     * were resolved)
-     */
-    if(ext_file == NULL) {
-        char *ptr = NULL;
-
-        /* Copy resolved file name */
-        if(NULL == (actual_file_name = H5MM_strdup(H5F_ACTUAL_NAME(loc.oloc->file))))
-            HGOTO_ERROR(H5E_LINK, H5E_CANTALLOC, FAIL, "can't duplicate resolved file name string")
-
-        /* get last component of file_name */
-        H5_GET_LAST_DELIMITER(actual_file_name, ptr)
-        if(!ptr)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTOPENFILE, FAIL, "unable to open external file, external link file name = '%s', temp_file_name = '%s'", file_name, temp_file_name)
-
-        /* Truncate filename portion from actual file name path */
-        *ptr = '\0';
-
-        /* Build new file name for the external file */
-        if(H5L_build_name(actual_file_name, temp_file_name, &full_name/*out*/) < 0)
-            HGOTO_ERROR(H5E_LINK, H5E_CANTGET, FAIL, "can't prepend prefix to filename")
-
-        /* Try opening with the resolved name */
-        if(NULL == (ext_file = H5F_efc_open(loc.oloc->file, full_name, intent, H5P_FILE_CREATE_DEFAULT, fapl_id, dxpl_id)))
-            HGOTO_ERROR(H5E_LINK, H5E_CANTOPENFILE, FAIL, "unable to open external file, external link file name = '%s', temp_file_name = '%s'", file_name, temp_file_name)
-        full_name = (char *)H5MM_xfree(full_name);
-    } /* end if */
+    /* Get the current elink prefix */
+    if(H5P_peek(plist, H5L_ACS_ELINK_PREFIX_NAME, &elink_prefix) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get external link prefix")
 
+    /* Search for the target file */
+    if(NULL == (ext_file = H5F_prefix_open_file(loc.oloc->file, H5F_PREFIX_ELINK, elink_prefix, file_name, intent, fapl_id)))
+        HGOTO_ERROR(H5E_LINK, H5E_CANTOPENFILE, FAIL, "unable to open external file, external link file name = '%s'", file_name)
 
     /* Retrieve the "group location" for the file's root group */
     if(H5G_root_loc(ext_file, &root_loc) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "unable to create location for file")
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "unable to create location for file")
 
     /* Open the object referenced in the external file */
-    if((ext_obj = H5O_open_name(&root_loc, obj_name, lapl_id, dxpl_id, FALSE)) < 0)
-        HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open object")
+    if((ext_obj = H5O_open_name(&root_loc, obj_name, FALSE)) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTOPENOBJ, FAIL, "unable to open object")
 
     /* Set return value */
     ret_value = ext_obj;
@@ -473,10 +249,6 @@ done:
         HDONE_ERROR(H5E_LINK, H5E_CANTCLOSEFILE, FAIL, "problem closing external file")
     if(parent_group_name && parent_group_name != local_group_name)
         parent_group_name = (char *)H5MM_xfree(parent_group_name);
-    full_name = (char *)H5MM_xfree(full_name);
-    temp_file_name = (char *)H5MM_xfree(temp_file_name);
-    actual_file_name = (char *)H5MM_xfree(actual_file_name);
-
     if(ret_value < 0) {
         /* Close object if it's open and something failed */
         if(ext_obj >= 0 && H5I_dec_ref(ext_obj) < 0)
@@ -484,28 +256,28 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_extern_traverse() */
+} /* end H5L__extern_traverse() */
+
 
-
 /*-------------------------------------------------------------------------
- * Function:	H5L_extern_query
+ * Function:	H5L__extern_query
  *
- * Purpose:	Default query function for external links. This can
+ * Purpose:    Default query function for external links. This can
  *              be overridden using H5Lregister().
  *
  *              Returns the size of the link's user data. If a buffer of
  *              is provided, copies at most buf_size bytes of the udata
  *              into it.
  *
- * Return:	Size of buffer on success/Negative on failure
+ * Return:    Size of buffer on success/Negative on failure
  *
- * Programmer:	James Laird
+ * Programmer:    James Laird
  *              Monday, July 10, 2006
  *
  *-------------------------------------------------------------------------
  */
 static ssize_t
-H5L_extern_query(const char H5_ATTR_UNUSED * link_name, const void *_udata, size_t udata_size,
+H5L__extern_query(const char H5_ATTR_UNUSED * link_name, const void *_udata, size_t udata_size,
     void *buf /*out*/, size_t buf_size)
 {
     const uint8_t *udata = (const uint8_t *)_udata;      /* Pointer to external link buffer */
@@ -534,25 +306,25 @@ H5L_extern_query(const char H5_ATTR_UNUSED * link_name, const void *_udata, size
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5L_extern_query() */
+} /* end H5L__extern_query() */
+
 
-
 /*-------------------------------------------------------------------------
- * Function:	H5Lcreate_external
+ * Function:    H5Lcreate_external
  *
- * Purpose:	Creates an external link from LINK_NAME to OBJ_NAME.
+ * Purpose:    Creates an external link from LINK_NAME to OBJ_NAME.
  *
  *              External links are links to objects in other HDF5 files.  They
  *              are allowed to "dangle" like soft links internal to a file.
  *              FILE_NAME is the name of the file that OBJ_NAME is is contained
  *              within.  If OBJ_NAME is given as a relative path name, the
  *              path will be relative to the root group of FILE_NAME.
- *		LINK_NAME is interpreted relative to LINK_LOC_ID, which is
+ *              LINK_NAME is interpreted relative to LINK_LOC_ID, which is
  *              either a file ID or a group ID.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Wednesday, May 18, 2005
  *
  *-------------------------------------------------------------------------
@@ -561,14 +333,13 @@ herr_t
 H5Lcreate_external(const char *file_name, const char *obj_name,
     hid_t link_loc_id, const char *link_name, hid_t lcpl_id, hid_t lapl_id)
 {
-    H5G_loc_t	link_loc;               /* Group location to create link */
-    char       *norm_obj_name = NULL;	/* Pointer to normalized current name */
+    H5G_loc_t    link_loc;               /* Group location to create link */
+    char       *norm_obj_name = NULL;    /* Pointer to normalized current name */
     void       *ext_link_buf = NULL;    /* Buffer to contain external link */
     size_t      buf_size;               /* Size of buffer to hold external link */
     size_t      file_name_len;          /* Length of file name string */
     size_t      norm_obj_name_len;      /* Length of normalized object name string */
     uint8_t    *p;                      /* Pointer into external link buffer */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */ 
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -577,17 +348,17 @@ H5Lcreate_external(const char *file_name, const char *obj_name,
 
     /* Check arguments */
     if(!file_name || !*file_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no file name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no file name specified")
     if(!obj_name || !*obj_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no object name specified")
     if(H5G_loc(link_loc_id, &link_loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
     if(!link_name || !*link_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no link name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no link name specified")
 
     /* Get normalized copy of the link target */
     if(NULL == (norm_obj_name = H5G_normalize(obj_name)))
-        HGOTO_ERROR(H5E_SYM, H5E_BADVALUE, FAIL, "can't normalize object name")
+        HGOTO_ERROR(H5E_LINK, H5E_BADVALUE, FAIL, "can't normalize object name")
 
     /* Combine the filename and link name into a single buffer to give to the UD link */
     file_name_len = HDstrlen(file_name) + 1;
@@ -603,12 +374,12 @@ H5Lcreate_external(const char *file_name, const char *obj_name,
     p += file_name_len;
     HDstrncpy((char *)p, norm_obj_name, buf_size - (file_name_len + 1));       /* External link's object */
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, link_loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, link_loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_LINK, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Create an external link */
-    if(H5L_create_ud(&link_loc, link_name, ext_link_buf, buf_size, H5L_TYPE_EXTERNAL, lcpl_id, lapl_id, dxpl_id) < 0)
+    if(H5L__create_ud(&link_loc, link_name, ext_link_buf, buf_size, H5L_TYPE_EXTERNAL, lcpl_id) < 0)
         HGOTO_ERROR(H5E_LINK, H5E_CANTINIT, FAIL, "unable to create link")
 
 done:
@@ -618,7 +389,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Lcreate_external() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5L_register_external
  *
@@ -647,7 +418,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5L_register_external() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5Lunpack_elink_val
  *
diff --git a/src/H5Lmodule.h b/src/H5Lmodule.h
index e665c81..cba4de4 100644
--- a/src/H5Lmodule.h
+++ b/src/H5Lmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Lpkg.h b/src/H5Lpkg.h
index bb8534b..f0e9cfc 100644
--- a/src/H5Lpkg.h
+++ b/src/H5Lpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -53,12 +51,11 @@
 /* Package Private Prototypes */
 /******************************/
 
-H5_DLL herr_t H5L_create_ud(const H5G_loc_t *link_loc, const char *link_name,
+H5_DLL herr_t H5L__create_ud(const H5G_loc_t *link_loc, const char *link_name,
     const void * ud_data, size_t ud_data_size, H5L_type_t type,
-    hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL herr_t H5L_link_copy_file(H5F_t *dst_file, hid_t dxpl_id,
-    const H5O_link_t *_src_lnk, const H5O_loc_t *src_oloc, H5O_link_t *dst_lnk,
-    H5O_copy_t *cpy_info);
+    hid_t lcpl_id);
+H5_DLL herr_t H5L__link_copy_file(H5F_t *dst_file, const H5O_link_t *_src_lnk,
+    const H5O_loc_t *src_oloc, H5O_link_t *dst_lnk, H5O_copy_t *cpy_info);
 
 #endif /* _H5Lpkg_H */
 
diff --git a/src/H5Lprivate.h b/src/H5Lprivate.h
index 1c8690b..3bbb6b6 100644
--- a/src/H5Lprivate.h
+++ b/src/H5Lprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -50,6 +48,50 @@
 /* Library Private Typedefs */
 /****************************/
 
+/* User data for path traversal routine for getting link value by index */
+typedef struct {
+    /* In */
+    H5_index_t idx_type;               /* Index to use */
+    H5_iter_order_t order;              /* Order to iterate in index */
+    hsize_t n;                          /* Offset of link within index */
+    size_t size;                        /* Size of user buffer */
+
+    /* Out */
+    void *buf;                          /* User buffer */
+} H5L_trav_gvbi_t;
+
+/* User data for path traversal routine for getting link info by index */
+typedef struct {
+    /* In */
+    H5_index_t idx_type;               /* Index to use */
+    H5_iter_order_t order;              /* Order to iterate in index */
+    hsize_t n;                          /* Offset of link within index */
+
+    /* Out */
+    H5L_info_t      *linfo;             /* Buffer to return to user */
+} H5L_trav_gibi_t;
+
+/* User data for path traversal routine for getting name by index */
+typedef struct {
+    /* In */
+    H5_index_t idx_type;                /* Index to use */
+    H5_iter_order_t order;              /* Order to iterate in index */
+    hsize_t n;                          /* Offset of link within index */
+    size_t size;                        /* Size of name buffer */
+
+    /* Out */
+    char *name;                         /* Buffer to return name to user */
+    ssize_t name_len;                   /* Length of full name */
+} H5L_trav_gnbi_t;
+
+/* User data for path traversal routine for removing link by index */
+typedef struct {
+    /* In */
+    H5_index_t idx_type;               /* Index to use */
+    H5_iter_order_t order;              /* Order to iterate in index */
+    hsize_t n;                          /* Offset of link within index */
+} H5L_trav_rmbi_t;
+
 /* Structure for external link traversal callback property */
 typedef struct H5L_elink_cb_t {
     H5L_elink_traverse_t      func;
@@ -69,26 +111,22 @@ typedef struct H5L_elink_cb_t {
 /* General operations on links */
 H5_DLL herr_t H5L_init(void);
 H5_DLL herr_t H5L_link(const H5G_loc_t *new_loc, const char *new_name,
-    H5G_loc_t *obj_loc, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id);
+    H5G_loc_t *obj_loc, hid_t lcpl_id);
 H5_DLL herr_t H5L_link_object(const H5G_loc_t *new_loc, const char *new_name,
-    H5O_obj_create_t *ocrt_info, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id);
+    H5O_obj_create_t *ocrt_info, hid_t lcpl_id);
 H5_DLL herr_t H5L_create_hard(H5G_loc_t *cur_loc, const char *cur_name,
-    const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id,
-    hid_t lapl_id, hid_t dxpl_id);
+    const H5G_loc_t *link_loc, const char *link_name, hid_t lcpl_id);
 H5_DLL herr_t H5L_create_soft(const char *target_path, const H5G_loc_t *cur_loc,
-    const char *cur_name, hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL hid_t H5L_get_default_lcpl(void);
-H5_DLL herr_t H5L_move(H5G_loc_t *src_loc, const char *src_name,
-    H5G_loc_t *dst_loc, const char *dst_name, hbool_t copy_flag,
-    hid_t lcpl_id, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL htri_t H5L_exists_tolerant(const H5G_loc_t *loc, const char *name, hid_t lapl_id,
-    hid_t dxpl_id);
+    const char *cur_name, hid_t lcpl_id);
+H5_DLL herr_t H5L_move(const H5G_loc_t *src_loc, const char *src_name,
+    const H5G_loc_t *dst_loc, const char *dst_name, hbool_t copy_flag,
+    hid_t lcpl_id);
+H5_DLL htri_t H5L_exists_tolerant(const H5G_loc_t *loc, const char *name);
 H5_DLL herr_t H5L_get_info(const H5G_loc_t *loc, const char *name,
-    H5L_info_t *linkbuf/*out*/, hid_t lapl_id, hid_t dxpl_id);
-H5_DLL herr_t H5L_delete(H5G_loc_t *loc, const char *name, hid_t lapl_id,
-    hid_t dxpl_id);
-H5_DLL herr_t H5L_get_val(H5G_loc_t *loc, const char *name, void *buf/*out*/,
-    size_t size, hid_t lapl_id, hid_t dxpl_id);
+    H5L_info_t *linkbuf/*out*/);
+H5_DLL herr_t H5L_delete(const H5G_loc_t *loc, const char *name);
+H5_DLL herr_t H5L_get_val(const H5G_loc_t *loc, const char *name, void *buf/*out*/,
+    size_t size);
 H5_DLL herr_t H5L_register_external(void);
 
 /* User-defined link functions */
diff --git a/src/H5Lpublic.h b/src/H5Lpublic.h
index ff2322f..e6fd37c 100644
--- a/src/H5Lpublic.h
+++ b/src/H5Lpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -43,7 +41,10 @@
 #define H5L_SAME_LOC (hid_t)0
 
 /* Current version of the H5L_class_t struct */
-#define H5L_LINK_CLASS_T_VERS 0
+#define H5L_LINK_CLASS_T_VERS 1
+
+/* Previous versions of the H5L_class_t struct */
+#define H5L_LINK_CLASS_T_VERS_0 0
 
 #ifdef __cplusplus
 extern "C" {
@@ -101,8 +102,10 @@ typedef herr_t (*H5L_copy_func_t)(const char *new_name, hid_t new_loc,
     const void *lnkdata, size_t lnkdata_size);
 
 /* Callback during link traversal */
-typedef hid_t (*H5L_traverse_func_t)(const char *link_name, hid_t cur_group,
+typedef hid_t (*H5L_traverse_0_func_t)(const char *link_name, hid_t cur_group,
     const void *lnkdata, size_t lnkdata_size, hid_t lapl_id);
+typedef hid_t (*H5L_traverse_func_t)(const char *link_name, hid_t cur_group,
+    const void *lnkdata, size_t lnkdata_size, hid_t lapl_id, hid_t dxpl_id);
 
 /* Callback for when the link is deleted */
 typedef herr_t (*H5L_delete_func_t)(const char *link_name, hid_t file,
@@ -121,6 +124,18 @@ typedef struct {
     H5L_create_func_t create_func;  /* Callback during link creation        */
     H5L_move_func_t move_func;      /* Callback after moving link           */
     H5L_copy_func_t copy_func;      /* Callback after copying link          */
+    H5L_traverse_0_func_t trav_func; /* Callback during link traversal       */
+    H5L_delete_func_t del_func;     /* Callback for link deletion           */
+    H5L_query_func_t query_func;    /* Callback for queries                 */
+} H5L_class_0_t;
+
+typedef struct {
+    int version;                    /* Version number of this struct        */
+    H5L_type_t id;                  /* Link type ID                         */
+    const char *comment;            /* Comment for debugging                */
+    H5L_create_func_t create_func;  /* Callback during link creation        */
+    H5L_move_func_t move_func;      /* Callback after moving link           */
+    H5L_copy_func_t copy_func;      /* Callback after copying link          */
     H5L_traverse_func_t trav_func;  /* Callback during link traversal       */
     H5L_delete_func_t del_func;     /* Callback for link deletion           */
     H5L_query_func_t query_func;    /* Callback for queries                 */
diff --git a/src/H5MF.c b/src/H5MF.c
index 87c910c..59ee1fc 100644
--- a/src/H5MF.c
+++ b/src/H5MF.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -81,23 +79,23 @@ typedef struct {
 /********************/
 
 /* Allocator routines */
-static haddr_t H5MF__alloc_pagefs(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, hsize_t size);
+static haddr_t H5MF__alloc_pagefs(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size);
 
 /* "File closing" routines */
-static herr_t H5MF__close_aggrfs(H5F_t *f, hid_t dxpl_id);
-static herr_t H5MF__close_pagefs(H5F_t *f, hid_t dxpl_id);
-static herr_t H5MF__close_shrink_eoa(H5F_t *f, hid_t dxpl_id);
+static herr_t H5MF__close_aggrfs(H5F_t *f);
+static herr_t H5MF__close_pagefs(H5F_t *f);
+static herr_t H5MF__close_shrink_eoa(H5F_t *f);
 
 /* General routines */
-static herr_t H5MF__get_free_sects(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5MF_sect_iter_ud_t *sect_udata, size_t *nums);
+static herr_t H5MF__get_free_sects(H5F_t *f, H5FS_t *fspace, H5MF_sect_iter_ud_t *sect_udata, size_t *nums);
 static hbool_t H5MF__fsm_type_is_self_referential(H5F_t *f, H5F_mem_page_t fsm_type);
 static hbool_t H5MF__fsm_is_self_referential(H5F_t *f, H5FS_t *fspace);
 
 /* Free-space type manager routines */
-static herr_t H5MF__create_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type);
-static herr_t H5MF__close_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type);
-static herr_t H5MF__delete_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type);
-static herr_t H5MF__close_delete_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type);
+static herr_t H5MF__create_fstype(H5F_t *f, H5F_mem_page_t type);
+static herr_t H5MF__close_fstype(H5F_t *f, H5F_mem_page_t type);
+static herr_t H5MF__delete_fstype(H5F_t *f, H5F_mem_page_t type);
+static herr_t H5MF__close_delete_fstype(H5F_t *f, H5F_mem_page_t type);
 
 
 /*********************/
@@ -117,6 +115,7 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
 /* Local Variables */
 /*******************/
 
+
 
 /*-------------------------------------------------------------------------
  * Function:    H5MF_init_merge_flags
@@ -276,7 +275,7 @@ H5MF_alloc_to_fs_type(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size, H5F_mem_pag
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5MF_open_fstype
+ * Function:	H5MF__open_fstype
  *
  * Purpose:	Open an existing free space manager of TYPE for file by
  *          creating a free-space structure.
@@ -292,7 +291,7 @@ H5MF_alloc_to_fs_type(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size, H5F_mem_pag
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_open_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
+H5MF__open_fstype(H5F_t *f, H5F_mem_page_t type)
 {
     const H5FS_section_class_t *classes[] = { /* Free space section classes implemented for file */
         H5MF_FSPACE_SECT_CLS_SIMPLE,
@@ -300,13 +299,11 @@ H5MF_open_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
         H5MF_FSPACE_SECT_CLS_LARGE };
     hsize_t alignment;                      /* Alignment to use */
     hsize_t threshold;                      /* Threshold to use */
-    H5P_genplist_t *dxpl = NULL;            /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;   /* ring of fsm */
-    hbool_t reset_ring = FALSE;             /* Whether the ring was set */
+    H5AC_ring_t fsm_ring;                   /* Ring of FSM */
     herr_t ret_value = SUCCEED;             /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(H5AC__FREESPACE_TAG)
 
     /*
      * Check arguments.
@@ -332,17 +329,15 @@ H5MF_open_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
         threshold = f->shared->threshold;
     } /* end else */
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_type_is_self_referential(f, type))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
     /* Open an existing free space structure for the file */
-    if(NULL == (f->shared->fs_man[type] = H5FS_open(f, dxpl_id, f->shared->fs_addr[type],
+    if(NULL == (f->shared->fs_man[type] = H5FS_open(f, f->shared->fs_addr[type],
 	    NELMTS(classes), classes, f, alignment, threshold)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize free space info")
 
@@ -351,13 +346,12 @@ H5MF_open_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
         f->shared->fs_state[type] = H5F_FS_STATE_OPEN;
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5MF_open_fstype() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5MF__open_fstype() */
 
 
 /*-------------------------------------------------------------------------
@@ -377,7 +371,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__create_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
+H5MF__create_fstype(H5F_t *f, H5F_mem_page_t type)
 {
     const H5FS_section_class_t *classes[] = { /* Free space section classes implemented for file */
         H5MF_FSPACE_SECT_CLS_SIMPLE,
@@ -385,14 +379,12 @@ H5MF__create_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
         H5MF_FSPACE_SECT_CLS_LARGE };
     H5FS_create_t fs_create;    /* Free space creation parameters */
     hsize_t alignment;          /* Alignment to use */
-    hsize_t threshold;			/* Threshold to use */
-    H5P_genplist_t *dxpl = NULL;            /* DXPL for setting ring */
+    hsize_t threshold;		/* Threshold to use */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;   /* ring of fsm */
-    hbool_t reset_ring = FALSE;             /* Whether the ring was set */
-    herr_t ret_value = SUCCEED;             /* Return value */
+    H5AC_ring_t fsm_ring;       /* Ring of FSM */
+    herr_t ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 
     /*
      * Check arguments.
@@ -425,16 +417,14 @@ H5MF__create_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
         threshold = f->shared->threshold;
     } /* end else */
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_type_is_self_referential(f, type))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
-    if(NULL == (f->shared->fs_man[type] = H5FS_create(f, dxpl_id, NULL,
+    if(NULL == (f->shared->fs_man[type] = H5FS_create(f, NULL,
 	    &fs_create, NELMTS(classes), classes, f, alignment, threshold)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize free space info")
 
@@ -443,17 +433,16 @@ H5MF__create_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
         f->shared->fs_state[type] = H5F_FS_STATE_OPEN;
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF__create_fstype() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5MF_start_fstype
+ * Function:	H5MF__start_fstype
  *
  * Purpose:	Open or create a free space manager of a given TYPE.
  *          Note that TYPE can be H5F_mem_page_t or H5FD_mem_t enum types.
@@ -468,11 +457,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_start_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
+H5MF__start_fstype(H5F_t *f, H5F_mem_page_t type)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(H5AC__FREESPACE_TAG)
 
     /*
      * Check arguments.
@@ -489,18 +478,18 @@ H5MF_start_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
     /* Check if the free space manager exists already */
     if(H5F_addr_defined(f->shared->fs_addr[type])) {
         /* Open existing free space manager */
-        if(H5MF_open_fstype(f, dxpl_id, type) < 0)
+        if(H5MF__open_fstype(f, type) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTOPENOBJ, FAIL, "can't initialize file free space")
     } /* end if */
     else {
         /* Create new free space manager */
-        if(H5MF__create_fstype(f, dxpl_id, type) < 0)
+        if(H5MF__create_fstype(f, type) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTCREATE, FAIL, "can't initialize file free space")
     } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5MF_start_fstype() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5MF__start_fstype() */
 
 
 /*-------------------------------------------------------------------------
@@ -517,16 +506,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__delete_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
+H5MF__delete_fstype(H5F_t *f, H5F_mem_page_t type)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;       /* ring of fsm */
-    hbool_t reset_ring = FALSE;         /* Whether the ring was set */
+    H5AC_ring_t fsm_ring;               /* Ring of FSM */
     haddr_t tmp_fs_addr;       	        /* Temporary holder for free space manager address */
     herr_t ret_value = SUCCEED;	        /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 
     /* check args */
     HDassert(f);
@@ -546,21 +533,19 @@ H5MF__delete_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
      */
     f->shared->fs_state[type] = H5F_FS_STATE_DELETING;
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_type_is_self_referential(f, type))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
 #ifdef H5MF_ALLOC_DEBUG_MORE
 HDfprintf(stderr, "%s: Before deleting free space manager\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
 
     /* Delete free space manager for this type */
-    if(H5FS_delete(f, dxpl_id, tmp_fs_addr) < 0)
+    if(H5FS_delete(f, tmp_fs_addr) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't delete free space manager")
 
     /* Shift [back] to closed state */
@@ -571,12 +556,11 @@ HDfprintf(stderr, "%s: Before deleting free space manager\n", FUNC);
     HDassert(!H5F_addr_defined(f->shared->fs_addr[type]));
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF__delete_fstype() */
 
 
@@ -594,11 +578,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__close_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
+H5MF__close_fstype(H5F_t *f, H5F_mem_page_t type)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 
     /*
      * Check arguments.
@@ -617,19 +601,19 @@ HDfprintf(stderr, "%s: Before closing free space manager\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
 
     /* Close an existing free space structure for the file */
-    if(H5FS_close(f, dxpl_id, f->shared->fs_man[type]) < 0)
+    if(H5FS_close(f, f->shared->fs_man[type]) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't release free space info")
     f->shared->fs_man[type] = NULL;
     f->shared->fs_state[type] = H5F_FS_STATE_CLOSED;
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF__close_fstype() */
 
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5MF_add_sect
+ * Function:    H5MF__add_sect
  *
  * Purpose:	    To add a section to the specified free-space manager.
  *
@@ -641,17 +625,15 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_add_sect(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, H5FS_t *fspace, H5MF_free_section_t *node)
+H5MF__add_sect(H5F_t *f, H5FD_mem_t alloc_type, H5FS_t *fspace, H5MF_free_section_t *node)
 {
-    H5P_genplist_t *dxpl = NULL;            /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;   /* ring of fsm */
-    H5MF_sect_ud_t udata;		            /* User data for callback */
-    H5F_mem_page_t  fs_type;                /* Free space type (mapped from allocation type) */
-
-    herr_t ret_value = SUCCEED; 	        /* Return value */
+    H5AC_ring_t fsm_ring;               /* Ring of FSM */
+    H5MF_sect_ud_t udata;		/* User data for callback */
+    H5F_mem_page_t  fs_type;            /* Free space type (mapped from allocation type) */
+    herr_t ret_value = SUCCEED; 	/* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(H5AC__FREESPACE_TAG)
 
     HDassert(f);
     HDassert(fspace);
@@ -661,36 +643,35 @@ H5MF_add_sect(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, H5FS_t *fspace, H5
 
     /* Construct user data for callbacks */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.alloc_type = alloc_type;
     udata.allow_sect_absorb = TRUE;
     udata.allow_eoa_shrink_only = FALSE;
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_is_self_referential(f, fspace))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
 #ifdef H5MF_ALLOC_DEBUG_MORE
 HDfprintf(stderr, "%s: adding node, node->sect_info.addr = %a, node->sect_info.size = %Hu\n", FUNC, node->sect_info.addr, node->sect_info.size);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
     /* Add the section */
-    if(H5FS_sect_add(f, dxpl_id, fspace, (H5FS_section_info_t *)node, H5FS_ADD_RETURNED_SPACE, &udata) < 0)
+    if(H5FS_sect_add(f, fspace, (H5FS_section_info_t *)node, H5FS_ADD_RETURNED_SPACE, &udata) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINSERT, FAIL, "can't re-add section to file free space")
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5MF_add_sect() */
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5MF__add_sect() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5MF_find_sect
+ * Function:    H5MF__find_sect
  *
  * Purpose:	To find a section from the specified free-space manager to fulfill the request.
  *		    If found, re-add the left-over space back to the manager.
@@ -703,31 +684,28 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5MF_find_sect(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, hsize_t size, H5FS_t *fspace, haddr_t *addr)
+H5MF__find_sect(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size, H5FS_t *fspace,
+    haddr_t *addr)
 {
-    H5P_genplist_t *dxpl = NULL;            /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;   /* ring of fsm */
+    H5AC_ring_t fsm_ring;                   /* Ring of FSM */
     H5MF_free_section_t *node;              /* Free space section pointer */
-    hbool_t reset_ring = FALSE;             /* Whether the ring was set */
     htri_t ret_value = FAIL;      	    /* Whether an existing free list node was found */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(H5AC__FREESPACE_TAG)
 
     HDassert(f);
     HDassert(fspace);
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_is_self_referential(f, fspace))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
     /* Try to get a section from the free space manager */
-    if((ret_value = H5FS_sect_find(f, dxpl_id, fspace, size, (H5FS_section_info_t **)&node)) < 0)
+    if((ret_value = H5FS_sect_find(f, fspace, size, (H5FS_section_info_t **)&node)) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "error locating free space in file")
 
 #ifdef H5MF_ALLOC_DEBUG_MORE
@@ -763,19 +741,18 @@ HDfprintf(stderr, "%s: re-adding node, node->sect_info.size = %Hu\n", FUNC, node
 #endif /* H5MF_ALLOC_DEBUG_MORE */
 
             /* Re-add the section to the free-space manager */
-            if(H5MF_add_sect(f, alloc_type, dxpl_id, fspace, node) < 0)
+            if(H5MF__add_sect(f, alloc_type, fspace, node) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINSERT, FAIL, "can't re-add section to file free space")
         } /* end else */
     } /* end if */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5MF_find_sect() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5MF__find_sect() */
 
 
 /*-------------------------------------------------------------------------
@@ -796,16 +773,14 @@ done:
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5MF_alloc(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, hsize_t size)
+H5MF_alloc(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t fsm_ring = H5AC_RING_INV;       /* free space manager ring */
-    H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
+    H5AC_ring_t orig_ring;              /* Original ring value */
     H5F_mem_page_t  fs_type;            /* Free space type (mapped from allocation type) */
-    hbool_t reset_ring = FALSE;         /* Whether the ring was set */
     haddr_t ret_value = HADDR_UNDEF;    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, HADDR_UNDEF)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, HADDR_UNDEF)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_type, size);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -818,7 +793,7 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
 
     if(f->shared->first_alloc_dealloc) {
         HDassert(! H5AC_cache_image_pending(f));
-        if(H5MF_tidy_self_referential_fsm_hack(f, dxpl_id) < 0)
+        if(H5MF_tidy_self_referential_fsm_hack(f) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "tidy of self referential fsm hack failed")
     } /* end if */
 
@@ -828,14 +803,12 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
 HDfprintf(stderr, "%s: Check 1.0\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_type_is_self_referential(f, fs_type))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, HADDR_UNDEF, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
     /* Check if we are using the free space manager for this file */
     if(H5F_HAVE_FREE_SPACE_MANAGER(f)) {
@@ -849,14 +822,14 @@ HDfprintf(stderr, "%s: Check 1.0\n", FUNC);
         /* Check if the free space manager for the file has been initialized */
         if(!f->shared->fs_man[fs_type] && H5F_addr_defined(f->shared->fs_addr[fs_type])) {
             /* Open the free-space manager */
-            if(H5MF_open_fstype(f, dxpl_id, fs_type) < 0)
+            if(H5MF__open_fstype(f, fs_type) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTOPENOBJ, HADDR_UNDEF, "can't initialize file free space")
             HDassert(f->shared->fs_man[fs_type]);
         } /* end if */
 
         /* Search for large enough space in the free space manager */
         if(f->shared->fs_man[fs_type])
-            if(H5MF_find_sect(f, alloc_type, dxpl_id, size, f->shared->fs_man[fs_type], &ret_value) < 0)
+            if(H5MF__find_sect(f, alloc_type, size, f->shared->fs_man[fs_type], &ret_value) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "error locating a node")
     } /* end if */
 
@@ -867,11 +840,11 @@ HDfprintf(stderr, "%s: Check 2.0\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
         if(f->shared->fs_strategy == H5F_FSPACE_STRATEGY_PAGE) {
             HDassert(f->shared->fs_page_size >= H5F_FILE_SPACE_PAGE_SIZE_MIN);
-            if(HADDR_UNDEF == (ret_value = H5MF__alloc_pagefs(f, alloc_type, dxpl_id, size)))
+            if(HADDR_UNDEF == (ret_value = H5MF__alloc_pagefs(f, alloc_type, size)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "allocation failed from paged aggregation")
         } /* end if */
         else { /* For non-paged aggregation, continue further action */
-            if(HADDR_UNDEF == (ret_value = H5MF_aggr_vfd_alloc(f, alloc_type, dxpl_id, size)))
+            if(HADDR_UNDEF == (ret_value = H5MF_aggr_vfd_alloc(f, alloc_type, size)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "allocation failed from aggr/vfd")
         } /* end else */
     } /* end if */
@@ -881,19 +854,18 @@ HDfprintf(stderr, "%s: Check 3.0\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, HADDR_UNDEF, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving: ret_value = %a, size = %Hu\n", FUNC, ret_value, size);
 #endif /* H5MF_ALLOC_DEBUG */
 #ifdef H5MF_ALLOC_DEBUG_DUMP
-H5MF_sects_dump(f, dxpl_id, stderr);
+H5MF_sects_dump(f, stderr);
 #endif /* H5MF_ALLOC_DEBUG_DUMP */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, HADDR_UNDEF)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF_alloc() */
 
 
@@ -919,13 +891,13 @@ H5MF_sects_dump(f, dxpl_id, stderr);
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5MF__alloc_pagefs(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, hsize_t size)
+H5MF__alloc_pagefs(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size)
 {
     H5F_mem_page_t ptype;		        /* Free-space mananger type */
     H5MF_free_section_t *node = NULL;  	/* Free space section pointer */
     haddr_t ret_value = HADDR_UNDEF; 	/* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, HADDR_UNDEF)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_type, size);
@@ -952,7 +924,7 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
             H5MF_EOA_MISALIGN(f, (eoa+size), f->shared->fs_page_size, frag_size);
 
             /* Allocate from VFD */
-            if(HADDR_UNDEF == (ret_value = H5F_alloc(f, dxpl_id, alloc_type, size + frag_size, NULL, NULL)))
+            if(HADDR_UNDEF == (ret_value = H5F__alloc(f, alloc_type, size + frag_size, NULL, NULL)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't allocate file space")
 
             /* If there is a mis-aligned fragment at EOA */
@@ -960,7 +932,7 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
 
                 /* Start up the free-space manager */
                 if(!(f->shared->fs_man[ptype]))
-                    if(H5MF_start_fstype(f, dxpl_id, ptype) < 0)
+                    if(H5MF__start_fstype(f, ptype) < 0)
                         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "can't initialize file free space")
 
                 /* Create free space section for the fragment */
@@ -968,7 +940,7 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "can't initialize free space section")
 
                 /* Add the fragment to the large free-space manager */
-                if(H5MF_add_sect(f, alloc_type, dxpl_id, f->shared->fs_man[ptype], node) < 0)
+                if(H5MF__add_sect(f, alloc_type, f->shared->fs_man[ptype], node) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINSERT, HADDR_UNDEF, "can't re-add section to file free space")
 
                 node = NULL;
@@ -986,12 +958,12 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
             haddr_t new_page;		/* The address for the new file size page */
 
             /* Allocate one file space page */
-            if(HADDR_UNDEF == (new_page = H5MF_alloc(f, alloc_type, dxpl_id, f->shared->fs_page_size)))
+            if(HADDR_UNDEF == (new_page = H5MF_alloc(f, alloc_type, f->shared->fs_page_size)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't allocate file space")
 
             /* Start up the free-space manager */
             if(!(f->shared->fs_man[ptype]))
-                if(H5MF_start_fstype(f, dxpl_id, ptype) < 0)
+                if(H5MF__start_fstype(f, ptype) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "can't initialize file free space")
             HDassert(f->shared->fs_man[ptype]);
 
@@ -999,7 +971,7 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, HADDR_UNDEF, "can't initialize free space section")
 
             /* Add the remaining space in the page to the manager */
-            if(H5MF_add_sect(f, alloc_type, dxpl_id, f->shared->fs_man[ptype], node) < 0)
+            if(H5MF__add_sect(f, alloc_type, f->shared->fs_man[ptype], node) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINSERT, HADDR_UNDEF, "can't re-add section to file free space")
 
             node = NULL;
@@ -1025,7 +997,7 @@ done:
 HDfprintf(stderr, "%s: Leaving: ret_value = %a, size = %Hu\n", FUNC, ret_value, size);
 #endif /* H5MF_ALLOC_DEBUG */
 #ifdef H5MF_ALLOC_DEBUG_DUMP
-H5MF_sects_dump(f, dxpl_id, stderr);
+H5MF_sects_dump(f, stderr);
 #endif /* H5MF_ALLOC_DEBUG_DUMP */
 
     /* Release section node, if allocated and not added to section list or merged */
@@ -1033,7 +1005,7 @@ H5MF_sects_dump(f, dxpl_id, stderr);
         if(H5MF_sect_free((H5FS_section_info_t *)node) < 0)
             HDONE_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, HADDR_UNDEF, "can't free section node")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, HADDR_UNDEF)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF__alloc_pagefs() */
 
 
@@ -1112,20 +1084,16 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_xfree(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, haddr_t addr,
-    hsize_t size)
+H5MF_xfree(H5F_t *f, H5FD_mem_t alloc_type, haddr_t addr, hsize_t size)
 {
-    H5F_io_info2_t fio_info;            /* I/O info for operation */
     H5F_mem_page_t  fs_type;            /* Free space type (mapped from allocation type) */
     H5MF_free_section_t *node = NULL;   /* Free space section pointer */
     unsigned ctype;			/* section class type */
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;   /* Ring of fsm */
-    hbool_t reset_ring = FALSE;         /* Whether the ring was set */
+    H5AC_ring_t fsm_ring;               /* Ring of FSM */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering - alloc_type = %u, addr = %a, size = %Hu\n", FUNC, (unsigned)alloc_type, addr, size);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -1138,20 +1106,18 @@ HDfprintf(stderr, "%s: Entering - alloc_type = %u, addr = %a, size = %Hu\n", FUN
 
     if(f->shared->first_alloc_dealloc) {
         HDassert(!H5AC_cache_image_pending(f));
-        if(H5MF_tidy_self_referential_fsm_hack(f, dxpl_id) < 0)
+        if(H5MF_tidy_self_referential_fsm_hack(f) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "tidy of self referential fsm hack failed")
     } /* end if */
 
     H5MF_alloc_to_fs_type(f, alloc_type, size, &fs_type);
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_type_is_self_referential(f, fs_type))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
     /* we are about to change the contents of the free space manager --
      * notify metadata cache that the associated fsm ring is
@@ -1166,24 +1132,14 @@ HDfprintf(stderr, "%s: Entering - alloc_type = %u, addr = %a, size = %Hu\n", FUN
     if(H5F_addr_le(f->shared->tmp_addr, addr))
         HGOTO_ERROR(H5E_RESOURCE, H5E_BADRANGE, FAIL, "attempting to free temporary file space")
 
-    /* Set up I/O info for operation */
-    fio_info.f = f;
-    if(H5FD_MEM_DRAW == alloc_type) {
-        if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(H5AC_ind_read_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
+    /* If it's metadata, check if the space to free intersects with the file's
+     * metadata accumulator
+     */
+    if(H5FD_MEM_DRAW != alloc_type) {
+        /* Check if the space to free intersects with the file's metadata accumulator */
+        if(H5F__accum_free(f, alloc_type, addr, size) < 0)
+            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't check free space intersection w/metadata accumulator")
     } /* end if */
-    else {
-        if(NULL == (fio_info.meta_dxpl = (H5P_genplist_t *)H5I_object(dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-        if(NULL == (fio_info.raw_dxpl = (H5P_genplist_t *)H5I_object(H5AC_rawdata_dxpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
-    } /* end else */
-
-    /* Check if the space to free intersects with the file's metadata accumulator */
-    if(H5F__accum_free(&fio_info, alloc_type, addr, size) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't check free space intersection w/metadata accumulator")
 
     /* Check if the free space manager for the file has been initialized */
     if(!f->shared->fs_man[fs_type]) {
@@ -1201,7 +1157,7 @@ HDfprintf(stderr, "%s: fs_addr = %a\n", FUNC, f->shared->fs_addr[fs_type]);
 HDfprintf(stderr, "%s: Trying to avoid starting up free space manager\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
             /* Try to shrink the file or absorb the block into a block aggregator */
-            if((status = H5MF_try_shrink(f, alloc_type, dxpl_id, addr, size)) < 0)
+            if((status = H5MF_try_shrink(f, alloc_type, addr, size)) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTMERGE, FAIL, "can't check for absorbing block")
             else if(status > 0)
                 /* Indicate success */
@@ -1235,7 +1191,7 @@ HDfprintf(stderr, "%s: dropping addr = %a, size = %Hu, on the floor!\n", FUNC, a
          *  space isn't at the end of the file, so start up (or create)
          *  the file space manager
          */
-        if(H5MF_start_fstype(f, dxpl_id, fs_type) < 0)
+        if(H5MF__start_fstype(f, fs_type) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space")
     } /* end if */
 
@@ -1253,7 +1209,7 @@ HDfprintf(stderr, "%s: Before H5FS_sect_add()\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
 
         /* Add to the free space for the file */
-        if(H5MF_add_sect(f, alloc_type, dxpl_id, f->shared->fs_man[fs_type], node) < 0)
+        if(H5MF__add_sect(f, alloc_type, f->shared->fs_man[fs_type], node) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINSERT, FAIL, "can't add section to file free space")
         node = NULL;
 
@@ -1267,13 +1223,12 @@ HDfprintf(stderr, "%s: After H5FS_sect_add()\n", FUNC);
 
         /* Construct user data for callbacks */
         udata.f = f;
-        udata.dxpl_id = dxpl_id;
         udata.alloc_type = alloc_type;
         udata.allow_sect_absorb = TRUE;
         udata.allow_eoa_shrink_only = FALSE;
 
         /* Try to merge the section that is smaller than threshold */
-	if((merged = H5FS_sect_try_merge(f, dxpl_id, f->shared->fs_man[fs_type], (H5FS_section_info_t *)node, H5FS_ADD_RETURNED_SPACE, &udata)) < 0)
+	if((merged = H5FS_sect_try_merge(f, f->shared->fs_man[fs_type], (H5FS_section_info_t *)node, H5FS_ADD_RETURNED_SPACE, &udata)) < 0)
 	    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINSERT, FAIL, "can't merge section to file free space")
 	else if(merged == TRUE) /* successfully merged */
 	    /* Indicate that the node was used */
@@ -1281,10 +1236,9 @@ HDfprintf(stderr, "%s: After H5FS_sect_add()\n", FUNC);
     } /* end else */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     /* Release section node, if allocated and not added to section list or merged */
     if(node)
@@ -1295,9 +1249,9 @@ done:
 HDfprintf(stderr, "%s: Leaving, ret_value = %d\n", FUNC, ret_value);
 #endif /* H5MF_ALLOC_DEBUG */
 #ifdef H5MF_ALLOC_DEBUG_DUMP
-H5MF_sects_dump(f, dxpl_id, stderr);
+H5MF_sects_dump(f, stderr);
 #endif /* H5MF_ALLOC_DEBUG_DUMP */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF_xfree() */
 
 
@@ -1324,21 +1278,19 @@ H5MF_sects_dump(f, dxpl_id, stderr);
  *-------------------------------------------------------------------------
  */
 htri_t
-H5MF_try_extend(H5F_t *f, hid_t dxpl_id, H5FD_mem_t alloc_type, haddr_t addr,
-    hsize_t size, hsize_t extra_requested)
+H5MF_try_extend(H5F_t *f, H5FD_mem_t alloc_type, haddr_t addr, hsize_t size,
+    hsize_t extra_requested)
 {
-    H5P_genplist_t *dxpl = NULL;            /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;   /* ring of fsm */
+    H5AC_ring_t fsm_ring;                   /* Ring of FSM */
     haddr_t end;                            /* End of block to extend */
     H5FD_mem_t  map_type;                   /* Mapped type */
     H5F_mem_page_t fs_type;                 /* free space type */
     htri_t allow_extend = TRUE;		    /* Possible to extend the block */
     hsize_t frag_size = 0;                  /* Size of mis-aligned fragment */
-    hbool_t reset_ring = FALSE;             /* Whether the ring was set */
     htri_t ret_value = FALSE;      	    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering: alloc_type = %u, addr = %a, size = %Hu, extra_requested = %Hu\n", FUNC, (unsigned)alloc_type, addr, size, extra_requested);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -1349,7 +1301,7 @@ HDfprintf(stderr, "%s: Entering: alloc_type = %u, addr = %a, size = %Hu, extra_r
 
     if(f->shared->first_alloc_dealloc) {
         HDassert(! H5AC_cache_image_pending(f));
-        if(H5MF_tidy_self_referential_fsm_hack(f, dxpl_id) < 0)
+        if(H5MF_tidy_self_referential_fsm_hack(f) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "tidy of self referential fsm hack failed")
     } /* end if */
 
@@ -1384,18 +1336,16 @@ HDfprintf(stderr, "%s: Entering: alloc_type = %u, addr = %a, size = %Hu, extra_r
     /* Get free space type from allocation type */
     H5MF_alloc_to_fs_type(f, alloc_type, size, &fs_type);
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_type_is_self_referential(f, fs_type))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
     if(allow_extend) {
         /* Try extending the block at EOA */
-        if((ret_value = H5F_try_extend(f, dxpl_id, map_type, end, extra_requested + frag_size)) < 0)
+        if((ret_value = H5F__try_extend(f, map_type, end, extra_requested + frag_size)) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTEXTEND, FAIL, "error extending file")
 #ifdef H5MF_ALLOC_DEBUG_MORE
 HDfprintf(stderr, "%s: extended = %t\n", FUNC, ret_value);
@@ -1411,7 +1361,7 @@ HDfprintf(stderr, "%s: extended = %t\n", FUNC, ret_value);
 
             /* Start up the free-space manager */
             if(!(f->shared->fs_man[fs_type]))
-                if(H5MF_start_fstype(f, dxpl_id, fs_type) < 0)
+                if(H5MF__start_fstype(f, fs_type) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space")
 
             /* Create free space section for the fragment */
@@ -1419,7 +1369,7 @@ HDfprintf(stderr, "%s: extended = %t\n", FUNC, ret_value);
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize free space section")
 
             /* Add the fragment to the large-sized free-space manager */
-            if(H5MF_add_sect(f, alloc_type, dxpl_id, f->shared->fs_man[fs_type], node) < 0)
+            if(H5MF__add_sect(f, alloc_type, f->shared->fs_man[fs_type], node) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINSERT, FAIL, "can't re-add section to file free space")
 
             node = NULL;
@@ -1432,11 +1382,11 @@ HDfprintf(stderr, "%s: extended = %t\n", FUNC, ret_value);
 
             /* Check if the block is able to extend into aggregation block */
             aggr = (map_type == H5FD_MEM_DRAW) ?  &(f->shared->sdata_aggr) : &(f->shared->meta_aggr);
-            if((ret_value = H5MF_aggr_try_extend(f, dxpl_id, aggr, map_type, end, extra_requested)) < 0)
+            if((ret_value = H5MF__aggr_try_extend(f, aggr, map_type, end, extra_requested)) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTEXTEND, FAIL, "error extending aggregation block")
 
 #ifdef H5MF_ALLOC_DEBUG_MORE
-HDfprintf(stderr, "%s: H5MF_aggr_try_extend = %t\n", FUNC, ret_value);
+HDfprintf(stderr, "%s: H5MF__aggr_try_extend = %t\n", FUNC, ret_value);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
         } /* end if */
 
@@ -1447,18 +1397,17 @@ HDfprintf(stderr, "%s: H5MF_aggr_try_extend = %t\n", FUNC, ret_value);
 
             /* Construct user data for callbacks */
             udata.f = f;
-            udata.dxpl_id = dxpl_id;
             udata.alloc_type = alloc_type;
 
             /* Check if the free space for the file has been initialized */
             if(!f->shared->fs_man[fs_type] && H5F_addr_defined(f->shared->fs_addr[fs_type]))
                 /* Open the free-space manager */
-                if(H5MF_open_fstype(f, dxpl_id, fs_type) < 0)
+                if(H5MF__open_fstype(f, fs_type) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space")
 
             /* Try to extend the block into a free-space section */
             if(f->shared->fs_man[fs_type]) {
-                if((ret_value = H5FS_sect_try_extend(f, dxpl_id, f->shared->fs_man[fs_type], addr, size, extra_requested, H5FS_ADD_RETURNED_SPACE, &udata)) < 0)
+                if((ret_value = H5FS_sect_try_extend(f, f->shared->fs_man[fs_type], addr, size, extra_requested, H5FS_ADD_RETURNED_SPACE, &udata)) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTEXTEND, FAIL, "error extending block in free space manager")
 #ifdef H5MF_ALLOC_DEBUG_MORE
 HDfprintf(stderr, "%s: Try to H5FS_sect_try_extend = %t\n", FUNC, ret_value);
@@ -1479,19 +1428,18 @@ HDfprintf(stderr, "%s: Try to extend into the page end threshold = %t\n", FUNC,
     } /* allow_extend */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving: ret_value = %t\n", FUNC, ret_value);
 #endif /* H5MF_ALLOC_DEBUG */
 #ifdef H5MF_ALLOC_DEBUG_DUMP
-H5MF_sects_dump(f, dxpl_id, stderr);
+H5MF_sects_dump(f, stderr);
 #endif /* H5MF_ALLOC_DEBUG_DUMP */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF_try_extend() */
 
 
@@ -1510,20 +1458,17 @@ H5MF_sects_dump(f, dxpl_id, stderr);
  *-------------------------------------------------------------------------
  */
 htri_t
-H5MF_try_shrink(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, haddr_t addr,
-    hsize_t size)
+H5MF_try_shrink(H5F_t *f, H5FD_mem_t alloc_type, haddr_t addr, hsize_t size)
 {
     H5MF_free_section_t *node = NULL;   /* Free space section pointer */
     H5MF_sect_ud_t udata;               /* User data for callback */
     H5FS_section_class_t *sect_cls;	/* Section class */
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    H5AC_ring_t fsm_ring = H5AC_RING_INV;   /* Ring of fsm */
-    H5F_mem_page_t fs_type;                 /* Free space type */
-    hbool_t reset_ring = FALSE;             /* Whether the ring was set */
-    htri_t ret_value = FAIL;                /* Return value */
+    H5AC_ring_t fsm_ring;               /* Ring of FSM */
+    H5F_mem_page_t fs_type;             /* Free space type */
+    htri_t ret_value = FALSE;           /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering - alloc_type = %u, addr = %a, size = %Hu\n", FUNC, (unsigned)alloc_type, addr, size);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -1542,14 +1487,12 @@ HDfprintf(stderr, "%s: Entering - alloc_type = %u, addr = %a, size = %Hu\n", FUN
     /* Get free space type from allocation type */
     H5MF_alloc_to_fs_type(f, alloc_type, size, &fs_type);
 
-    /* Set the ring type in the DXPL */
+    /* Set the ring type in the API context */
     if(H5MF__fsm_type_is_self_referential(f, fs_type))
         fsm_ring = H5AC_RING_MDFSM;
     else
         fsm_ring = H5AC_RING_RDFSM;
-    if(H5AC_set_ring(dxpl_id, fsm_ring, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(fsm_ring, &orig_ring);
 
     /* Create free-space section for block */
     if(NULL == (node = H5MF_sect_new(sect_cls->type, addr, size)))
@@ -1557,7 +1500,6 @@ HDfprintf(stderr, "%s: Entering - alloc_type = %u, addr = %a, size = %Hu\n", FUN
 
     /* Construct user data for callbacks */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.alloc_type = alloc_type;
     udata.allow_sect_absorb = FALSE;    /* Force section to be absorbed into aggregator */
     udata.allow_eoa_shrink_only = FALSE;
@@ -1575,10 +1517,9 @@ HDfprintf(stderr, "%s: Entering - alloc_type = %u, addr = %a, size = %Hu\n", FUN
     } /* end if */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     /* Free section node allocated */
     if(node && H5MF_sect_free((H5FS_section_info_t *)node) < 0)
@@ -1587,7 +1528,7 @@ done:
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving, ret_value = %d\n", FUNC, ret_value);
 #endif /* H5MF_ALLOC_DEBUG */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF_try_shrink() */
 
 
@@ -1604,11 +1545,11 @@ HDfprintf(stderr, "%s: Leaving, ret_value = %d\n", FUNC, ret_value);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_close(H5F_t *f, hid_t dxpl_id)
+H5MF_close(H5F_t *f)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -1618,20 +1559,18 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
     HDassert(f->shared);
 
     if(H5F_PAGED_AGGR(f)) {
-        if((ret_value = H5MF__close_pagefs(f, dxpl_id)) < 0)
+        if((ret_value = H5MF__close_pagefs(f)) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTFREE, FAIL, "can't close free-space managers for 'page' file space")
     } /* end if */
-    else {
-        if((ret_value = H5MF__close_aggrfs(f, dxpl_id)) < 0)
+    else
+        if((ret_value = H5MF__close_aggrfs(f)) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTFREE, FAIL, "can't close free-space managers for 'aggr' file space")
-    } /* end else */
 
 done:
-
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF_close() */
 
 
@@ -1650,11 +1589,11 @@ HDfprintf(stderr, "%s: Leaving\n", FUNC);
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__close_delete_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type)
+H5MF__close_delete_fstype(H5F_t *f, H5F_mem_page_t type)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -1673,7 +1612,7 @@ HDfprintf(stderr, "%s: Check 1.0 - f->shared->fs_man[%u] = %p, f->shared->fs_add
 
     /* If the free space manager for this type is open, close it */
     if(f->shared->fs_man[type])
-        if(H5MF__close_fstype(f, dxpl_id, type) < 0)
+        if(H5MF__close_fstype(f, type) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't close the free space manager")
 
 #ifdef H5MF_ALLOC_DEBUG_MORE
@@ -1682,14 +1621,14 @@ HDfprintf(stderr, "%s: Check 2.0 - f->shared->fs_man[%u] = %p, f->shared->fs_add
 
     /* If there is free space manager info for this type, delete it */
     if(H5F_addr_defined(f->shared->fs_addr[type]))
-        if(H5MF__delete_fstype(f, dxpl_id, type) < 0)
+        if(H5MF__delete_fstype(f, type) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't delete the free space manager")
 
 done:
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5MF__close_delete() */
 
 
@@ -1708,16 +1647,14 @@ HDfprintf(stderr, "%s: Leaving\n", FUNC);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_try_close(H5F_t *f, hid_t dxpl_id)
+H5MF_try_close(H5F_t *f)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
-    H5AC_ring_t curr_ring = H5AC_RING_INV;      /* Current ring value */
-    H5AC_ring_t needed_ring = H5AC_RING_INV;    /* Ring value needed for this iteration  */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
-    hbool_t reset_ring = FALSE;         /* Whether the ring was set */
+    H5AC_ring_t curr_ring;              /* Current ring value */
+    H5AC_ring_t needed_ring;            /* Ring value needed for this iteration  */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -1741,23 +1678,20 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
      */
     if(f->shared->first_alloc_dealloc) {
         if(H5AC_cache_image_pending(f)) {
-            if(H5AC_force_cache_image_load(f, dxpl_id) < 0)
+            if(H5AC_force_cache_image_load(f) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "forced cache image load failed")
         } /* end if */
         else {
-            if(H5MF_tidy_self_referential_fsm_hack(f, dxpl_id) < 0)
+            if(H5MF_tidy_self_referential_fsm_hack(f) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "tidy of self referential fsm hack failed")
         } /* end else */
     } /* end if */
 
-    /* Set the ring type in the DXPL.  In most cases, we will
+    /* Set the ring type in the API context.  In most cases, we will
      * need H5AC_RING_RDFSM, so initialy set the ring in
-     * the DXPL to that value.  We will alter this later if
-     * needed.
+     * the DXPL to that value.  We will alter this later if needed.
      */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_RDFSM, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(H5AC_RING_RDFSM, &orig_ring);
     curr_ring = H5AC_RING_RDFSM;
 
     if(H5F_PAGED_AGGR(f)) {
@@ -1772,14 +1706,12 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
                 needed_ring = H5AC_RING_MDFSM;
             else
                 needed_ring = H5AC_RING_RDFSM;
-
             if(needed_ring != curr_ring ) {
-                if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value (1)")
+                H5AC_set_ring(needed_ring, NULL);
                 curr_ring = needed_ring;
             } /* end if */
 
-            if(H5MF__close_delete_fstype(f, dxpl_id, ptype) < 0)
+            if(H5MF__close_delete_fstype(f, ptype) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't close the free space manager")
         } /* end for */
     } /* end if */
@@ -1790,33 +1722,30 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
          * get each free list's space 
          */
         for(type = H5FD_MEM_DEFAULT; type < H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t, type)) {
-            /* test to see if we need to switch rings -- do so if required */
+            /* Test to see if we need to switch rings -- do so if required */
             if(H5MF__fsm_type_is_self_referential(f, (H5F_mem_page_t)type))
                 needed_ring = H5AC_RING_MDFSM;
             else
                 needed_ring = H5AC_RING_RDFSM;
-
             if(needed_ring != curr_ring) {
-                if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
+                H5AC_set_ring(needed_ring, NULL);
                 curr_ring = needed_ring;
             } /* end if */
 
-            if(H5MF__close_delete_fstype(f, dxpl_id, (H5F_mem_page_t)type) < 0)
+            if(H5MF__close_delete_fstype(f, (H5F_mem_page_t)type) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't close the free space manager")
         } /* end for */
     } /* end else */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5MF_try_close() */
 
 
@@ -1833,17 +1762,15 @@ HDfprintf(stderr, "%s: Leaving\n", FUNC);
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__close_aggrfs(H5F_t *f, hid_t dxpl_id)
+H5MF__close_aggrfs(H5F_t *f)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
-    H5AC_ring_t curr_ring = H5AC_RING_INV;      /* Current ring value */
-    H5AC_ring_t needed_ring = H5AC_RING_INV;    /* Ring value needed for this iteration.  */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
-    H5FD_mem_t type;          	        /* Memory type for iteration */
-    hbool_t reset_ring = FALSE;         /* Whether the ring was set */
-    herr_t ret_value = SUCCEED;	        /* Return value */
+    H5AC_ring_t curr_ring;          /* Current ring value */
+    H5AC_ring_t needed_ring;        /* Ring value needed for this iteration.  */
+    H5FD_mem_t type;          	    /* Memory type for iteration */
+    herr_t ret_value = SUCCEED;	    /* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -1854,23 +1781,20 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
     HDassert(f->shared->lf);
     HDassert(f->shared->sblock);
 
-    /* Set the ring type in the DXPL.  In most cases, we will
+    /* Set the ring type in the API context.  In most cases, we will
      * need H5AC_RING_RDFSM, so initialy set the ring in
-     * the DXPL to that value.  We will alter this later if
-     * needed.
+     * the DXPL to that value.  We will alter this later if needed.
      */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_RDFSM, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(H5AC_RING_RDFSM, &orig_ring);
     curr_ring = H5AC_RING_RDFSM;
 
     /* Free the space in aggregators */
     /* (for space not at EOA, it may be put into free space managers) */
-    if(H5MF_free_aggrs(f, dxpl_id) < 0)
+    if(H5MF_free_aggrs(f) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFREE, FAIL, "can't free aggregators")
 
     /* Trying shrinking the EOA for the file */
-    if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+    if(H5MF__close_shrink_eoa(f) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
     /* Making free-space managers persistent for superblock version >= 2 */
@@ -1907,29 +1831,25 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
         fsinfo.eoa_pre_fsm_fsalloc = f->shared->eoa_pre_fsm_fsalloc;
 
         /* Write the free space manager message -- message must already exist */
-        if(H5F_super_ext_write_msg(f, dxpl_id, H5O_FSINFO_ID, &fsinfo, FALSE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
+        if(H5F__super_ext_write_msg(f, H5O_FSINFO_ID, &fsinfo, FALSE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_WRITEERROR, FAIL, "error in writing message to superblock extension")
 
         /* Close the free space managers */
         for(type = H5FD_MEM_SUPER; type < H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t, type)) {
             if(f->shared->fs_man[type]) {
-                /* test to see if we need to switch rings -- do 
-                 * so if required 
-                 */
+                /* Test to see if we need to switch rings -- do so if required */
                 if(H5MF__fsm_type_is_self_referential(f, (H5F_mem_page_t)type))
                     needed_ring = H5AC_RING_MDFSM;
                 else 
                     needed_ring = H5AC_RING_RDFSM;
-
                 if(needed_ring != curr_ring) {
-                    if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value (1)")
+                    H5AC_set_ring(needed_ring, NULL);
                     curr_ring = needed_ring;
                 } /* end if */
 
                 HDassert(f->shared->fs_state[type] == H5F_FS_STATE_OPEN);
 
-                if(H5FS_close(f, dxpl_id, f->shared->fs_man[type]) < 0)
+                if(H5FS_close(f, f->shared->fs_man[type]) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't close free space manager")
                 f->shared->fs_man[type] = NULL;
                 f->shared->fs_state[type] = H5F_FS_STATE_CLOSED;
@@ -1953,7 +1873,7 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
 
         /* Trying shrinking the EOA for the file */
         /* (in case any free space is now at the EOA) */
-        if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+        if(H5MF__close_shrink_eoa(f) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
         /* get the eoa, and verify that it has the expected value */
@@ -1968,30 +1888,29 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
     } /* end if */
     else {  /* super_vers can be 0, 1, 2 */
         for(type = H5FD_MEM_DEFAULT; type < H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t, type))
-            if(H5MF__close_delete_fstype(f, dxpl_id, (H5F_mem_page_t)type) < 0)
+            if(H5MF__close_delete_fstype(f, (H5F_mem_page_t)type) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space")
     } /* end else */
 
     /* Free the space in aggregators (again) */
     /* (in case any free space information re-started them) */
-    if(H5MF_free_aggrs(f, dxpl_id) < 0)
+    if(H5MF_free_aggrs(f) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFREE, FAIL, "can't free aggregators")
 
     /* Trying shrinking the EOA for the file */
     /* (in case any free space is now at the EOA) */
-    if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+    if(H5MF__close_shrink_eoa(f) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF__close_aggrfs() */
 
 
@@ -2007,20 +1926,16 @@ HDfprintf(stderr, "%s: Leaving\n", FUNC);
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__close_pagefs(H5F_t *f, hid_t dxpl_id)
+H5MF__close_pagefs(H5F_t *f)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
-    H5AC_ring_t curr_ring = H5AC_RING_INV;      /* current ring value */
-    H5AC_ring_t needed_ring = H5AC_RING_INV;    /* ring value needed for this
-                                                 * iteration.
-                                                 */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
+    H5AC_ring_t curr_ring;          /* Current ring value */
+    H5AC_ring_t needed_ring;        /* Ring value needed for this iteration.  */
     H5F_mem_page_t ptype; 	/* Memory type for iteration */
     H5O_fsinfo_t fsinfo;	/* File space info message */
-    hbool_t reset_ring = FALSE; /* Whether the ring was set */
     herr_t ret_value = SUCCEED;	/* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Entering\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -2033,18 +1948,15 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
     HDassert(f->shared->fs_page_size);
     HDassert(f->shared->sblock->super_vers >= HDF5_SUPERBLOCK_VERSION_2);
 
-    /* Set the ring type in the DXPL.  In most cases, we will
+    /* Set the ring type in the API context.  In most cases, we will
      * need H5AC_RING_RDFSM, so initialy set the ring in
-     * the DXPL to that value.  We will alter this later if
-     * needed.
+     * the DXPL to that value.  We will alter this later if needed.
      */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_RDFSM, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(H5AC_RING_RDFSM, &orig_ring);
     curr_ring = H5AC_RING_RDFSM;
 
     /* Trying shrinking the EOA for the file */
-    if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+    if(H5MF__close_shrink_eoa(f) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
     /* Set up file space info message */
@@ -2081,30 +1993,26 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
         fsinfo.eoa_pre_fsm_fsalloc = f->shared->eoa_pre_fsm_fsalloc;
 
         /* Write the free space manager message -- message must already exist */
-        if(H5F_super_ext_write_msg(f, dxpl_id, H5O_FSINFO_ID, &fsinfo, FALSE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
+        if(H5F__super_ext_write_msg(f, H5O_FSINFO_ID, &fsinfo, FALSE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_WRITEERROR, FAIL, "error in writing message to superblock extension")
 
         /* Close the free space managers */
         /* use H5MF__close_fstype() for this? */
         for(ptype = H5F_MEM_PAGE_META; ptype < H5F_MEM_PAGE_NTYPES; H5_INC_ENUM(H5F_mem_page_t, ptype)) {
             if(f->shared->fs_man[ptype]) {
-                /* test to see if we need to switch rings -- do
-                 * so if required
-                 */
+                /* Test to see if we need to switch rings -- do so if required */
                 if(H5MF__fsm_type_is_self_referential(f, ptype))
                     needed_ring = H5AC_RING_MDFSM;
                 else
                     needed_ring = H5AC_RING_RDFSM;
-
                 if(needed_ring != curr_ring) {
-                    if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value (1)")
+                    H5AC_set_ring(needed_ring, NULL);
                     curr_ring = needed_ring;
                 } /* end if */
 
                 HDassert(f->shared->fs_state[ptype] == H5F_FS_STATE_OPEN);
 
-                if(H5FS_close(f, dxpl_id, f->shared->fs_man[ptype]) < 0)
+                if(H5FS_close(f, f->shared->fs_man[ptype]) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't close free space manager")
                 f->shared->fs_man[ptype] = NULL;
                 f->shared->fs_state[ptype] = H5F_FS_STATE_CLOSED;
@@ -2119,7 +2027,7 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
 
         /* Trying shrinking the EOA for the file */
         /* (in case any free space is now at the EOA) */
-        if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+        if(H5MF__close_shrink_eoa(f) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
         /* get the eoa, and verify that it has the expected value */
@@ -2152,30 +2060,29 @@ HDfprintf(stderr, "%s: Entering\n", FUNC);
          * and get each free list's space 
          */
         for(ptype = H5F_MEM_PAGE_META; ptype < H5F_MEM_PAGE_NTYPES; H5_INC_ENUM(H5F_mem_page_t, ptype))
-            if(H5MF__close_delete_fstype(f, dxpl_id, ptype) < 0)
+            if(H5MF__close_delete_fstype(f, ptype) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't close the free space manager")
 
         /* Write file space info message to superblock extension object header */
         /* Create the superblock extension object header in advance if needed */
-        if(H5F_super_ext_write_msg(f, dxpl_id, H5O_FSINFO_ID, &fsinfo, FALSE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
+        if(H5F__super_ext_write_msg(f, H5O_FSINFO_ID, &fsinfo, FALSE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_WRITEERROR, FAIL, "error in writing message to superblock extension")
     } /* end else */
 
     /* Trying shrinking the EOA for the file */
     /* (in case any free space is now at the EOA) */
-    if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+    if(H5MF__close_shrink_eoa(f) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Leaving\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF__close_pagefs() */
 
 
@@ -2192,21 +2099,19 @@ HDfprintf(stderr, "%s: Leaving\n", FUNC);
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__close_shrink_eoa(H5F_t *f, hid_t dxpl_id)
+H5MF__close_shrink_eoa(H5F_t *f)
 {
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
-    H5AC_ring_t curr_ring = H5AC_RING_INV;      /* Current ring value */
-    H5AC_ring_t needed_ring = H5AC_RING_INV;    /* Ring value needed for this iteration.  */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
+    H5AC_ring_t curr_ring;      /* Current ring value */
+    H5AC_ring_t needed_ring;    /* Ring value needed for this iteration.  */
     H5F_mem_t type;
-    H5F_mem_page_t ptype;        /* Memory type for iteration */
+    H5F_mem_page_t ptype;       /* Memory type for iteration */
     hbool_t eoa_shrank;		/* Whether an EOA shrink occurs */
     htri_t status;		/* Status value */
     H5MF_sect_ud_t udata;	/* User data for callback */
-    hbool_t reset_ring = FALSE; /* Whether the ring was set */
     herr_t ret_value = SUCCEED;	/* Return value */
 
-    FUNC_ENTER_STATIC_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__FREESPACE_TAG)
 
     /* check args */
     HDassert(f);
@@ -2214,14 +2119,11 @@ H5MF__close_shrink_eoa(H5F_t *f, hid_t dxpl_id)
 
     /* Construct user data for callbacks */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.allow_sect_absorb = FALSE;
     udata.allow_eoa_shrink_only = TRUE;
 
-    /* Set the ring type in the DXPL */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_RDFSM, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value(1)")
-    reset_ring = TRUE;
+    /* Set the ring type in the API context */
+    H5AC_set_ring(H5AC_RING_RDFSM, &orig_ring);
     curr_ring = H5AC_RING_RDFSM;
 
     /* Iterate until no more EOA shrinking occurs */
@@ -2237,16 +2139,14 @@ H5MF__close_shrink_eoa(H5F_t *f, hid_t dxpl_id)
                         needed_ring = H5AC_RING_MDFSM;
                     else
                         needed_ring = H5AC_RING_RDFSM;
-
                     if(needed_ring != curr_ring) {
-                        if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value (1)")
+                        H5AC_set_ring(needed_ring, NULL);
                         curr_ring = needed_ring;
                     } /* end if */
 
                     udata.alloc_type = (H5FD_mem_t)((H5FD_mem_t)ptype < H5FD_MEM_NTYPES ? ptype : ((ptype % H5FD_MEM_NTYPES) + 1));
 
-                    if((status = H5FS_sect_try_shrink_eoa(f, dxpl_id, f->shared->fs_man[ptype], &udata)) < 0)
+                    if((status = H5FS_sect_try_shrink_eoa(f, f->shared->fs_man[ptype], &udata)) < 0)
                         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't check for shrinking eoa")
                     else if(status > 0)
                         eoa_shrank = TRUE;
@@ -2262,16 +2162,14 @@ H5MF__close_shrink_eoa(H5F_t *f, hid_t dxpl_id)
                         needed_ring = H5AC_RING_MDFSM;
                     else
                         needed_ring = H5AC_RING_RDFSM;
-
                     if(needed_ring != curr_ring) {
-                        if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value (1)")
+                        H5AC_set_ring(needed_ring, NULL);
                         curr_ring = needed_ring;
                     } /* end if */
 
                     udata.alloc_type = type;
 
-                    if((status = H5FS_sect_try_shrink_eoa(f, dxpl_id, f->shared->fs_man[type], &udata)) < 0)
+                    if((status = H5FS_sect_try_shrink_eoa(f, f->shared->fs_man[type], &udata)) < 0)
                         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't check for shrinking eoa")
                 else if(status > 0)
                     eoa_shrank = TRUE;
@@ -2279,7 +2177,7 @@ H5MF__close_shrink_eoa(H5F_t *f, hid_t dxpl_id)
             } /* end for */
 
             /* check the two aggregators */
-            if((status = H5MF_aggrs_try_shrink_eoa(f, dxpl_id)) < 0)
+            if((status = H5MF_aggrs_try_shrink_eoa(f)) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't check for shrinking eoa")
             else if(status > 0)
                 eoa_shrank = TRUE;
@@ -2287,12 +2185,11 @@ H5MF__close_shrink_eoa(H5F_t *f, hid_t dxpl_id)
     } while(eoa_shrank);
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF__close_shrink_eoa() */
 
 
@@ -2310,7 +2207,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_get_freespace(H5F_t *f, hid_t dxpl_id, hsize_t *tot_space, hsize_t *meta_size)
+H5MF_get_freespace(H5F_t *f, hsize_t *tot_space, hsize_t *meta_size)
 {
     haddr_t ma_addr = HADDR_UNDEF;  /* Base "metadata aggregator" address */
     hsize_t ma_size = 0;            /* Size of "metadata aggregator" */
@@ -2324,28 +2221,23 @@ H5MF_get_freespace(H5F_t *f, hid_t dxpl_id, hsize_t *tot_space, hsize_t *meta_si
     H5F_mem_page_t end_type;        /* Memory type for iteration */
     htri_t fs_started[H5F_MEM_PAGE_NTYPES]; /* Indicate whether the free-space manager has been started */
     haddr_t fs_eoa[H5FD_MEM_NTYPES];        /* EAO for each free-space manager */
-    H5P_genplist_t *dxpl = NULL;            /* DXPL for setting ring */
-    H5AC_ring_t curr_ring = H5AC_RING_INV;      /* Current ring value */
-    H5AC_ring_t needed_ring = H5AC_RING_INV;    /* Ring value needed for this iteration.  */
     H5AC_ring_t orig_ring = H5AC_RING_INV;  /* Original ring value */
-    hbool_t reset_ring = FALSE;             /* Whether the ring was set */
-    herr_t ret_value = SUCCEED;             /* Return value */
+    H5AC_ring_t curr_ring;          /* Current ring value */
+    H5AC_ring_t needed_ring;        /* Ring value needed for this iteration.  */
+    herr_t ret_value = SUCCEED;     /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 
     /* check args */
     HDassert(f);
     HDassert(f->shared);
     HDassert(f->shared->lf);
 
-    /* Set the ring type in the DXPL.  In most cases, we will
+    /* Set the ring type in the API context.  In most cases, we will
      * need H5AC_RING_RDFSM, so initialy set the ring in
-     * the DXPL to that value.  We will alter this later if
-     * needed.
+     * the DXPL to that value.  We will alter this later if needed.
      */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_RDFSM, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(H5AC_RING_RDFSM, &orig_ring);
     curr_ring = H5AC_RING_RDFSM;
 
     /* Determine start/end points for loop */
@@ -2378,23 +2270,19 @@ H5MF_get_freespace(H5F_t *f, hid_t dxpl_id, hsize_t *tot_space, hsize_t *meta_si
 
         /* Check if the free space for the file has been initialized */
         if(!f->shared->fs_man[type] && H5F_addr_defined(f->shared->fs_addr[type])) {
-            if(H5MF_open_fstype(f, dxpl_id, type) < 0)
+            if(H5MF__open_fstype(f, type) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space")
             HDassert(f->shared->fs_man[type]);
             fs_started[type] = TRUE;
         } /* end if */
 
-        /* test to see if we need to switch rings -- do
-         * so if required
-         */
+        /* Test to see if we need to switch rings -- do so if required */
         if(H5MF__fsm_type_is_self_referential(f, (H5F_mem_page_t)type))
             needed_ring = H5AC_RING_MDFSM;
         else
             needed_ring = H5AC_RING_RDFSM;
-
         if(needed_ring != curr_ring) {
-            if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
+            H5AC_set_ring(needed_ring, NULL);
             curr_ring = needed_ring;
         } /* end if */
 
@@ -2422,15 +2310,13 @@ H5MF_get_freespace(H5F_t *f, hid_t dxpl_id, hsize_t *tot_space, hsize_t *meta_si
             needed_ring = H5AC_RING_MDFSM;
         else
             needed_ring = H5AC_RING_RDFSM;
-
         if(needed_ring != curr_ring) {
-            if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
+            H5AC_set_ring(needed_ring, &curr_ring);
             curr_ring = needed_ring;
         } /* end if */
 
         if(fs_started[type])
-            if(H5MF__close_fstype(f, dxpl_id, type) < 0)
+            if(H5MF__close_fstype(f, type) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't close file free space")
     } /* end for */
 
@@ -2442,12 +2328,11 @@ H5MF_get_freespace(H5F_t *f, hid_t dxpl_id, hsize_t *tot_space, hsize_t *meta_si
         *meta_size = tot_meta_size;
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF_get_freespace() */
 
 
@@ -2464,20 +2349,18 @@ done:
  *-------------------------------------------------------------------------
  */
 ssize_t
-H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, size_t nsects, H5F_sect_info_t *sect_info)
+H5MF_get_free_sections(H5F_t *f, H5FD_mem_t type, size_t nsects, H5F_sect_info_t *sect_info)
 {
-    H5P_genplist_t *dxpl = NULL;                /* DXPL for setting ring */
-    H5AC_ring_t curr_ring = H5AC_RING_INV;      /* Current ring value */
-    H5AC_ring_t needed_ring = H5AC_RING_INV;    /* Ring value needed for this iteration.  */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
+    H5AC_ring_t curr_ring;                      /* Current ring value */
+    H5AC_ring_t needed_ring;                    /* Ring value needed for this iteration.  */
     size_t total_sects = 0;                     /* Total number of sections */
     H5MF_sect_iter_ud_t sect_udata;             /* User data for callback */
     H5F_mem_page_t start_type, end_type;        /* Memory types to iterate over */
     H5F_mem_page_t ty;                          /* Memory type for iteration */
-    hbool_t reset_ring = FALSE;                 /* Whether the ring was set */
     ssize_t ret_value = -1;                     /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, -1)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 
     /* check args */
     HDassert(f);
@@ -2498,11 +2381,11 @@ H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, size_t nsects,
      */
     if(f->shared->first_alloc_dealloc) {
         if(H5AC_cache_image_pending(f)) {
-            if(H5AC_force_cache_image_load(f, dxpl_id) < 0)
+            if(H5AC_force_cache_image_load(f) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "forced cache image load failed")
         } /* end if */
         else {
-            if(H5MF_tidy_self_referential_fsm_hack(f, dxpl_id) < 0)
+            if(H5MF_tidy_self_referential_fsm_hack(f) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "tidy of self referential fsm hack failed")
         } /* end else */
     } /* end if */
@@ -2524,14 +2407,11 @@ H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, size_t nsects,
     sect_udata.sect_count = nsects;
     sect_udata.sect_idx = 0;
 
-    /* Set the ring type in the DXPL.  In most cases, we will
+    /* Set the ring type in the API context.  In most cases, we will
      * need H5AC_RING_RDFSM, so initialy set the ring in
-     * the DXPL to that value.  We will alter this later if
-     * needed.
+     * the DXPL to that value.  We will alter this later if needed.
      */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_RDFSM, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value(0)")
-    reset_ring = TRUE;
+    H5AC_set_ring(H5AC_RING_RDFSM, &orig_ring);
     curr_ring = H5AC_RING_RDFSM;
 
     /* Iterate over memory types, retrieving the number of sections of each type */
@@ -2544,15 +2424,13 @@ H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, size_t nsects,
             needed_ring = H5AC_RING_MDFSM;
         else
             needed_ring = H5AC_RING_RDFSM;
-
         if(needed_ring != curr_ring) {
-            if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value (1)")
+            H5AC_set_ring(needed_ring, &curr_ring);
             curr_ring = needed_ring;
         } /* end if */
 
         if(!f->shared->fs_man[ty] && H5F_addr_defined(f->shared->fs_addr[ty])) {
-            if(H5MF_open_fstype(f, dxpl_id, ty) < 0)
+            if(H5MF__open_fstype(f, ty) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't open the free space manager")
             HDassert(f->shared->fs_man[ty]);
             fs_started = TRUE;
@@ -2560,7 +2438,7 @@ H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, size_t nsects,
 
         /* Check if there's free space sections of this type */
         if(f->shared->fs_man[ty])
-            if(H5MF__get_free_sects(f, dxpl_id, f->shared->fs_man[ty], &sect_udata, &nums) < 0)
+            if(H5MF__get_free_sects(f, f->shared->fs_man[ty], &sect_udata, &nums) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't get section info for the free space manager")
 
         /* Increment total # of sections */
@@ -2568,7 +2446,7 @@ H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, size_t nsects,
 
         /* Close the free space manager of this type, if we started it here */
         if(fs_started)
-            if(H5MF__close_fstype(f, dxpl_id, ty) < 0)
+            if(H5MF__close_fstype(f, ty) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTCLOSEOBJ, FAIL, "can't close file free space")
         if((H5F_PAGED_AGGR(f)) && (type != H5FD_MEM_DEFAULT))
             ty = (H5F_mem_page_t)(ty + H5FD_MEM_NTYPES - 2);
@@ -2578,12 +2456,11 @@ H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, size_t nsects,
     ret_value = (ssize_t)total_sects;
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, -1)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5MF_get_free_sections() */
 
 
@@ -2631,7 +2508,7 @@ H5MF_sects_cb(H5FS_section_info_t *_sect, void *_udata)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__get_free_sects(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5MF_sect_iter_ud_t *sect_udata, size_t *nums)
+H5MF__get_free_sects(H5F_t *f, H5FS_t *fspace, H5MF_sect_iter_ud_t *sect_udata, size_t *nums)
 {
     hsize_t hnums = 0;          	/* # of sections */
     herr_t ret_value = SUCCEED; 	/* Return value */
@@ -2652,7 +2529,7 @@ H5MF__get_free_sects(H5F_t *f, hid_t dxpl_id, H5FS_t *fspace, H5MF_sect_iter_ud_
     /* Check if we should retrieve the section info */
     if(sect_udata->sects && *nums > 0)
         /* Iterate over all the free space sections of this type, adding them to the user's section info */
-        if(H5FS_sect_iterate(f, dxpl_id, fspace, H5MF_sects_cb, sect_udata) < 0)
+        if(H5FS_sect_iterate(f, fspace, H5MF_sects_cb, sect_udata) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_BADITER, FAIL, "can't iterate over sections")
 
 done:
@@ -2762,7 +2639,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
+H5MF_settle_raw_data_fsm(H5F_t *f, hbool_t *fsm_settled)
 {
     int pass_count;
     hsize_t alloc_size;
@@ -2770,14 +2647,12 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
     H5F_mem_page_t fsm_type;            /* FSM type for iteration */
     H5O_fsinfo_t fsinfo;                /* Free space manager info message */
     H5FS_stat_t fs_stat;                /* Information for free-space manager */
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
-    H5AC_ring_t curr_ring = H5AC_RING_INV;      /* Current ring value */
-    H5AC_ring_t needed_ring = H5AC_RING_INV;    /* Ring value needed for this iteration */
-    hbool_t reset_ring = FALSE;         /* Whether the ring was set */
+    H5AC_ring_t curr_ring;              /* Current ring value */
+    H5AC_ring_t needed_ring;            /* Ring value needed for this iteration.  */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 
     /* Check args */
     HDassert(f);
@@ -2822,7 +2697,7 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
          * is enabled -- skip this if so.
          */
         /* Vailin -- is this correct? */
-        if(!H5F_PAGED_AGGR(f) && (H5MF_free_aggrs(f, dxpl_id) < 0))
+        if(!H5F_PAGED_AGGR(f) && (H5MF_free_aggrs(f) < 0))
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't free aggregators")
 
         /* Set the ring type in the DXPL.  In most cases, we will
@@ -2830,9 +2705,7 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
          * the DXPL to that value.  We will alter this later if
          * needed.
          */
-        if(H5AC_set_ring(dxpl_id, H5AC_RING_MDFSM, &dxpl, &orig_ring) < 0)
-            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value(0)")
-        reset_ring = TRUE;
+        H5AC_set_ring(H5AC_RING_MDFSM, &orig_ring);
         curr_ring = H5AC_RING_MDFSM;
 
         /* b) Free the file space (if any) allocated to each free space manager.
@@ -2896,7 +2769,7 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                             /* Sanity check */
                             HDassert(fsm_opened[fsm_type] == FALSE);
 
-                             if(H5MF_open_fstype(f, dxpl_id, fsm_type) < 0)
+                             if(H5MF__open_fstype(f, fsm_type) < 0)
                                  HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space manager")
                             fsm_opened[fsm_type] = TRUE;
                         } /* end if */
@@ -2908,10 +2781,8 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                              needed_ring = H5AC_RING_MDFSM;
                         else
                              needed_ring = H5AC_RING_RDFSM;
-
                         if(needed_ring != curr_ring) {
-                            if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring) < 0)
-                                HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
+                            H5AC_set_ring(needed_ring, NULL);
                             curr_ring = needed_ring;
                         } /* end if */
 
@@ -2925,7 +2796,7 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                              * reallocate later if the free space manager contains
                              * any free space.
                              */
-                            if(H5FS_free(f, f->shared->fs_man[fsm_type], dxpl_id, TRUE) < 0)
+                            if(H5FS_free(f, f->shared->fs_man[fsm_type], TRUE) < 0)
                                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't release free-space headers")
                             f->shared->fs_addr[fsm_type] = HADDR_UNDEF;
                         } /* end if */
@@ -2951,11 +2822,11 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
          *            Leave it in for now, but consider removing it.
          */
         if(H5F_addr_defined(f->shared->sblock->ext_addr))
-            if(H5F_super_ext_remove_msg(f, dxpl_id, H5O_FSINFO_ID) < 0)
+            if(H5F__super_ext_remove_msg(f, H5O_FSINFO_ID) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "error in removing message from superblock extension")
 
         /* As the final element in 1), shrink the EOA for the file */
-        if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+        if(H5MF__close_shrink_eoa(f) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
 
@@ -2981,7 +2852,7 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
         fsinfo.pgend_meta_thres = f->shared->pgend_meta_thres;
         fsinfo.eoa_pre_fsm_fsalloc = HADDR_UNDEF;
 
-        if(H5F_super_ext_write_msg(f, dxpl_id, H5O_FSINFO_ID, &fsinfo, TRUE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
+        if(H5F__super_ext_write_msg(f, H5O_FSINFO_ID, &fsinfo, TRUE, H5O_MSG_FLAG_MARK_IF_UNKNOWN) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_WRITEERROR, FAIL, "error in writing fsinfo message to superblock extension")
 
 
@@ -3030,15 +2901,13 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                 else  /* paged allocation disabled -- should be unreachable */
                     HDassert(FALSE);
 
-                /* test to see if we need to switch rings -- do so if required */
+                /* Test to see if we need to switch rings -- do so if required */
                 if(H5MF__fsm_type_is_self_referential(f, fsm_type))
                     needed_ring = H5AC_RING_MDFSM;
                 else
                     needed_ring = H5AC_RING_RDFSM;
-
                 if(needed_ring != curr_ring) {
-                    if(H5AC_set_ring(dxpl_id, needed_ring, &dxpl, &curr_ring)< 0)
-                        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
+                    H5AC_set_ring(needed_ring, NULL);
                     curr_ring = needed_ring;
                 } /* end if */
 
@@ -3073,13 +2942,13 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                                 HDassert(!H5F_addr_defined(fs_stat.addr));
 
                                 /* Allocate FSM header */
-                                if(H5FS_alloc_hdr(f, f->shared->fs_man[fsm_type], &f->shared->fs_addr[fsm_type], dxpl_id) < 0)
+                                if(H5FS_alloc_hdr(f, f->shared->fs_man[fsm_type], &f->shared->fs_addr[fsm_type]) < 0)
                                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't allocated free-space header")
 
                                 /* Allocate FSM section info */
                                 HDassert(!H5F_addr_defined(fs_stat.sect_addr));
                                 HDassert(fs_stat.alloc_sect_size == 0);
-                                if(H5FS_alloc_sect(f, f->shared->fs_man[fsm_type], dxpl_id) < 0 )
+                                if(H5FS_alloc_sect(f, f->shared->fs_man[fsm_type]) < 0 )
                                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't allocate free-space section info")
 
 #ifndef NDEBUG
@@ -3105,7 +2974,7 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
 
                     /* Close any opened FSMs */
                     if(fsm_opened[fsm_type]) {
-                        if(H5MF__close_fstype(f, dxpl_id, fsm_type) < 0)
+                        if(H5MF__close_fstype(f, fsm_type) < 0)
                             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't close file free space manager")
                         fsm_opened[fsm_type] = FALSE;
                     } /* end if */
@@ -3122,12 +2991,11 @@ H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
     } /* end if */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5MF_settle_raw_data_fsm() */
 
 
@@ -3234,7 +3102,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
+H5MF_settle_meta_data_fsm(H5F_t *f, hbool_t *fsm_settled)
 {
     H5F_mem_page_t sm_fshdr_fs_type;	/* small fs hdr fsm */
     H5F_mem_page_t sm_fssinfo_fs_type;  /* small fs sinfo fsm */
@@ -3248,13 +3116,10 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                                         /* for self referential FSMs */
     haddr_t eoa_post_fsm_fsalloc;       /* eoa post file space allocation */
                                         /* for self referential FSMs */
-    H5FS_stat_t fs_stat;                /* Information for hdr FSM */
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV; /* Original ring value */
-    hbool_t	reset_ring = FALSE;     /* Whether we set the ring */
     herr_t 	ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 
     /* Check args */
     HDassert(f);
@@ -3305,12 +3170,13 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
             lg_sinfo_fspace = f->shared->fs_man[lg_fssinfo_fs_type];
         } /* end if */
 
-        /* Set the ring in the dxpl appropriately for subsequent calls */
-        if(H5AC_set_ring(dxpl_id, H5AC_RING_MDFSM, &dxpl, &orig_ring) < 0)
-            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-        reset_ring = TRUE;
+        /* Set the ring in the API context appropriately for subsequent calls */
+        H5AC_set_ring(H5AC_RING_MDFSM, &orig_ring);
 
 #ifndef NDEBUG
+{
+        H5FS_stat_t fs_stat;                /* Information for hdr FSM */
+
         /* Verify that sm_hdr_fspace is floating if it exists */
         if(sm_hdr_fspace) {
             /* Query free space manager info for this type */
@@ -3358,6 +3224,7 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
                 HDassert(fs_stat.alloc_sect_size == 0);
             } /* end if */
         } /* end if */
+}
 #endif /* NDEBUG */
 
         /* Free the space in the metadata aggregator.  Do this via the
@@ -3369,11 +3236,11 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
          */
         /* Vailin -- is this correct? */
         /* (for space not at EOF, it may be put into free space managers) */
-        if((!H5F_PAGED_AGGR(f)) && (H5MF_free_aggrs(f, dxpl_id) < 0))
+        if((!H5F_PAGED_AGGR(f)) && (H5MF_free_aggrs(f) < 0))
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't free aggregators")
 
         /* Trying shrinking the EOA for the file */
-        if(H5MF__close_shrink_eoa(f, dxpl_id) < 0)
+        if(H5MF__close_shrink_eoa(f) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't shrink eoa")
 
         /* At this point, the EOA should be set to a value that contains 
@@ -3463,20 +3330,20 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
          * the fragment on the floor for now.
          */
         if(sm_hdr_fspace)
-            if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, dxpl_id, sm_hdr_fspace, &(f->shared->fs_addr[sm_fshdr_fs_type])) < 0)
+            if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, sm_hdr_fspace, &(f->shared->fs_addr[sm_fshdr_fs_type])) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't vfd allocate sm hdr FSM file space")
 
         if(sm_sinfo_fspace && (sm_sinfo_fspace != sm_hdr_fspace))
-            if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, dxpl_id, sm_sinfo_fspace, &(f->shared->fs_addr[sm_fssinfo_fs_type])) < 0)
+            if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, sm_sinfo_fspace, &(f->shared->fs_addr[sm_fssinfo_fs_type])) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't vfd allocate sm sinfo FSM file space")
 
         if(H5F_PAGED_AGGR(f)) {
             if(lg_hdr_fspace)
-                if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, dxpl_id, lg_hdr_fspace, &(f->shared->fs_addr[lg_fshdr_fs_type])) < 0)
+                if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, lg_hdr_fspace, &(f->shared->fs_addr[lg_fshdr_fs_type])) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't vfd allocate lg hdr FSM file space")
 
             if(lg_sinfo_fspace && (lg_sinfo_fspace != lg_hdr_fspace))
-                if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, dxpl_id, lg_sinfo_fspace, &(f->shared->fs_addr[lg_fssinfo_fs_type])) < 0)
+                if(H5FS_vfd_alloc_hdr_and_section_info_if_needed(f, lg_sinfo_fspace, &(f->shared->fs_addr[lg_fssinfo_fs_type])) < 0)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "can't vfd allocate lg sinfo FSM file space")
         } /* end if */
 
@@ -3501,11 +3368,11 @@ H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled)
     } /* end if */
 
 done:
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5MF_settle_meta_data_fsm() */
 
 
@@ -3684,11 +3551,10 @@ H5MF__fsm_is_self_referential(H5F_t *f, H5FS_t *fspace)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
+H5MF_tidy_self_referential_fsm_hack(H5F_t *f)
 {
     haddr_t eoa;                        /* EOA of file */
     hsize_t tail_size = 0;              /* Size of chunk to free */
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV; /* Original ring value */
     haddr_t first_srfsm_hdr = HADDR_UNDEF; /* Addr of first self referential */
                                            /* fsm header in file             */
@@ -3697,10 +3563,9 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
     H5F_mem_page_t sm_fssinfo_fs_type;  /* Small fs sinfo fsm */
     H5F_mem_page_t lg_fshdr_fs_type;    /* Large fs hdr fsm */
     H5F_mem_page_t lg_fssinfo_fs_type;  /* Large fs sinfo fsm */
-    hbool_t reset_ring = FALSE;         /* Whether the ring was set */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 
     /* check args */
     HDassert(f);
@@ -3708,12 +3573,10 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
     HDassert(f->shared->fs_persist);
     HDassert(f->shared->first_alloc_dealloc);
 
-    /* Set the ring type in the DXPL.  Since we are only dealing with 
+    /* Set the ring type in the API context.  Since we are only dealing with 
      * self referential FSMs, we will only need H5AC_RING_MDFSM.
      */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_MDFSM, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set ring value")
-    reset_ring = TRUE;
+    H5AC_set_ring(H5AC_RING_MDFSM, &orig_ring);
 
     /* 1) Verify that f->shared->first_alloc_dealloc is TRUE, 
      *    and then set it to FALSE.  
@@ -3761,7 +3624,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
         first_srfsm_hdr = f->shared->fs_addr[sm_fshdr_fs_type];
 
         /* open the FSM */
-        if(H5MF_open_fstype(f, dxpl_id, sm_fshdr_fs_type) < 0)
+        if(H5MF__open_fstype(f, sm_fshdr_fs_type) < 0)
              HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL,  "can't initialize file free space manager")
 
         HDassert(f->shared->fs_man[sm_fshdr_fs_type]);
@@ -3778,7 +3641,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
         HDassert(NULL == f->shared->fs_man[sm_fssinfo_fs_type]);
 
         /* open the FSM */
-        if(H5MF_open_fstype(f, dxpl_id, sm_fssinfo_fs_type) < 0)
+        if(H5MF__open_fstype(f, sm_fssinfo_fs_type) < 0)
              HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space manager")
 
         HDassert(f->shared->fs_man[sm_fssinfo_fs_type]);
@@ -3806,7 +3669,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
             HDassert(NULL == f->shared->fs_man[lg_fshdr_fs_type]);
 
             /* open the FSM */
-            if(H5MF_open_fstype(f, dxpl_id, lg_fshdr_fs_type) < 0)
+            if(H5MF__open_fstype(f, lg_fshdr_fs_type) < 0)
                  HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space manager")
             HDassert(f->shared->fs_man[lg_fshdr_fs_type]);
         } /* end if */
@@ -3820,7 +3683,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
             HDassert(NULL == f->shared->fs_man[lg_fssinfo_fs_type]);
 
             /* open the FSM */
-            if(H5MF_open_fstype(f, dxpl_id, lg_fssinfo_fs_type) < 0)
+            if(H5MF__open_fstype(f, lg_fssinfo_fs_type) < 0)
                  HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space manager")
             HDassert(f->shared->fs_man[lg_fssinfo_fs_type]);
         } /* end if */
@@ -3835,7 +3698,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
 
         HDassert(H5F_addr_defined(fs_stat.addr));
         HDassert(H5F_addr_defined(fs_stat.sect_addr));
-        if(H5FS_free(f, f->shared->fs_man[sm_fshdr_fs_type], dxpl_id, FALSE) < 0)
+        if(H5FS_free(f, f->shared->fs_man[sm_fshdr_fs_type], FALSE) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't release free-space headers")
         f->shared->fs_addr[sm_fshdr_fs_type] = HADDR_UNDEF;
     } /* end if */
@@ -3847,7 +3710,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
 
         HDassert(H5F_addr_defined(fs_stat.addr));
         HDassert(H5F_addr_defined(fs_stat.sect_addr));
-        if(H5FS_free(f, f->shared->fs_man[sm_fssinfo_fs_type], dxpl_id, FALSE) < 0)
+        if(H5FS_free(f, f->shared->fs_man[sm_fssinfo_fs_type], FALSE) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't release free-space headers")
         f->shared->fs_addr[sm_fssinfo_fs_type] = HADDR_UNDEF;
     } /* end if */
@@ -3860,7 +3723,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
 
             HDassert(H5F_addr_defined(fs_stat.addr));
             HDassert(H5F_addr_defined(fs_stat.sect_addr));
-            if(H5FS_free(f, f->shared->fs_man[lg_fshdr_fs_type], dxpl_id, FALSE) < 0)
+            if(H5FS_free(f, f->shared->fs_man[lg_fshdr_fs_type], FALSE) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't float free-space headers")
             f->shared->fs_addr[lg_fshdr_fs_type] = HADDR_UNDEF;
         } /* end if */
@@ -3872,7 +3735,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
 
             HDassert(H5F_addr_defined(fs_stat.addr));
             HDassert(H5F_addr_defined(fs_stat.sect_addr));
-            if(H5FS_free(f, f->shared->fs_man[lg_fssinfo_fs_type], dxpl_id, FALSE) < 0)
+            if(H5FS_free(f, f->shared->fs_man[lg_fssinfo_fs_type], FALSE) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTRELEASE, FAIL, "can't float free-space headers")
             f->shared->fs_addr[lg_fssinfo_fs_type] = HADDR_UNDEF;
         } /* end if */
@@ -3900,7 +3763,7 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
     tail_size = (hsize_t)(eoa - f->shared->eoa_pre_fsm_fsalloc);
 
     /* Release file space allocated to self referential FSMs */
-    if(H5F_free(f, dxpl_id, H5FD_MEM_DEFAULT, f->shared->eoa_pre_fsm_fsalloc, tail_size) < 0)
+    if(H5F__free(f, H5FD_MEM_DEFAULT, f->shared->eoa_pre_fsm_fsalloc, tail_size) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "driver free request failed")
     if(HADDR_UNDEF == (eoa = H5FD_get_eoa(f->shared->lf, H5FD_MEM_DEFAULT)))
         HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "unable to get EOA")
@@ -3911,11 +3774,10 @@ H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id)
     HDassert((!H5F_PAGED_AGGR(f)) || (0 == (eoa % f->shared->fs_page_size)));
 
 done:
-    /* Reset the ring in the DXPL */
-    if(reset_ring)
-        if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-            HDONE_ERROR(H5E_RESOURCE, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5MF_tidy_self_referential_fsm_hack() */
 
diff --git a/src/H5MFaggr.c b/src/H5MFaggr.c
index de98bf1..cd80a10 100644
--- a/src/H5MFaggr.c
+++ b/src/H5MFaggr.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -57,9 +55,9 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5MF__aggr_free(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type,
+static herr_t H5MF__aggr_free(H5F_t *f, H5FD_mem_t type,
     H5F_blk_aggr_t *aggr);
-static haddr_t H5MF__aggr_alloc(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr,
+static haddr_t H5MF__aggr_alloc(H5F_t *f, H5F_blk_aggr_t *aggr,
     H5F_blk_aggr_t *other_aggr, H5FD_mem_t type, hsize_t size);
 
 
@@ -97,7 +95,7 @@ static haddr_t H5MF__aggr_alloc(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr,
  *-------------------------------------------------------------------------
  */
 haddr_t
-H5MF_aggr_vfd_alloc(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, hsize_t size)
+H5MF_aggr_vfd_alloc(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size)
 {
     haddr_t     ret_value = HADDR_UNDEF;        /* Return value */
 
@@ -115,12 +113,12 @@ HDfprintf(stderr, "%s: alloc_type = %u, size = %Hu\n", FUNC, (unsigned)alloc_typ
     /* Couldn't find anything from the free space manager, go allocate some */
     if(alloc_type != H5FD_MEM_DRAW && alloc_type != H5FD_MEM_GHEAP) {
         /* Handle metadata differently from "raw" data */
-        if(HADDR_UNDEF == (ret_value = H5MF__aggr_alloc(f, dxpl_id, &(f->shared->meta_aggr), &(f->shared->sdata_aggr), alloc_type, size)))
+        if(HADDR_UNDEF == (ret_value = H5MF__aggr_alloc(f, &(f->shared->meta_aggr), &(f->shared->sdata_aggr), alloc_type, size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't allocate metadata")
     } /* end if */
     else {
         /* Allocate "raw" data: H5FD_MEM_DRAW and H5FD_MEM_GHEAP */
-        if(HADDR_UNDEF == (ret_value = H5MF__aggr_alloc(f, dxpl_id, &(f->shared->sdata_aggr), &(f->shared->meta_aggr), H5FD_MEM_DRAW, size)))
+        if(HADDR_UNDEF == (ret_value = H5MF__aggr_alloc(f, &(f->shared->sdata_aggr), &(f->shared->meta_aggr), H5FD_MEM_DRAW, size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't allocate raw data")
     } /* end else */
 
@@ -151,8 +149,8 @@ HDfprintf(stderr, "%s: Leaving: ret_value = %a, size = %Hu\n", FUNC, ret_value,
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5MF__aggr_alloc(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr,
-    H5F_blk_aggr_t *other_aggr, H5FD_mem_t type, hsize_t size)
+H5MF__aggr_alloc(H5F_t *f, H5F_blk_aggr_t *aggr, H5F_blk_aggr_t *other_aggr,
+    H5FD_mem_t type, hsize_t size)
 {
     haddr_t     eoa_frag_addr = HADDR_UNDEF;    /* Address of fragment at EOA */
     hsize_t     eoa_frag_size = 0;      	/* Size of fragment at EOA */
@@ -220,7 +218,7 @@ HDfprintf(stderr, "%s: aggr = {%a, %Hu, %Hu}\n", FUNC, aggr->addr, aggr->tot_siz
                 if(H5F_addr_gt((aggr->addr + aggr->size + ext_size), f->shared->tmp_addr))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_BADRANGE, HADDR_UNDEF, "'normal' file space allocation request will overlap into 'temporary' file space")
 
-		if((aggr->addr > 0) && (extended = H5F_try_extend(f, dxpl_id, alloc_type, (aggr->addr + aggr->size), ext_size)) < 0)
+		if((aggr->addr > 0) && (extended = H5F__try_extend(f, alloc_type, (aggr->addr + aggr->size), ext_size)) < 0)
 		    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't extending space")
 		else if (extended) {
 		    /* aggr->size is unchanged */
@@ -234,12 +232,12 @@ HDfprintf(stderr, "%s: aggr = {%a, %Hu, %Hu}\n", FUNC, aggr->addr, aggr->tot_siz
                      */
 		    if((other_aggr->size > 0) && (H5F_addr_eq((other_aggr->addr + other_aggr->size), eoa)) &&
 			    (other_aggr->tot_size > other_aggr->size) && ((other_aggr->tot_size - other_aggr->size) >= other_aggr->alloc_size)) {
-                        if(H5MF__aggr_free(f, dxpl_id, other_alloc_type, other_aggr) < 0)
+                        if(H5MF__aggr_free(f, other_alloc_type, other_aggr) < 0)
                             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "can't free aggregation block")
 		    } /* end if */
 
                     /* Allocate space from the VFD (i.e. at the end of the file) */
-		    if(HADDR_UNDEF == (ret_value = H5F_alloc(f, dxpl_id, alloc_type, size, &eoa_frag_addr, &eoa_frag_size)))
+		    if(HADDR_UNDEF == (ret_value = H5F__alloc(f, alloc_type, size, &eoa_frag_addr, &eoa_frag_size)))
 			HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't allocate file space")
                 } /* end else */
             } /* end if */
@@ -258,7 +256,7 @@ HDfprintf(stderr, "%s: Allocating block\n", FUNC);
                 if(H5F_addr_gt((aggr->addr + aggr->size + ext_size), f->shared->tmp_addr))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_BADRANGE, HADDR_UNDEF, "'normal' file space allocation request will overlap into 'temporary' file space")
 
-		if((aggr->addr > 0) && (extended = H5F_try_extend(f, dxpl_id, alloc_type, (aggr->addr + aggr->size), ext_size)) < 0)
+		if((aggr->addr > 0) && (extended = H5F__try_extend(f, alloc_type, (aggr->addr + aggr->size), ext_size)) < 0)
 		    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't extending space")
 		else if(extended) {
 		    aggr->addr += aggr_frag_size;
@@ -274,17 +272,17 @@ HDfprintf(stderr, "%s: Allocating block\n", FUNC);
                      */
 		    if((other_aggr->size > 0) && (H5F_addr_eq((other_aggr->addr + other_aggr->size), eoa)) &&
 			    (other_aggr->tot_size > other_aggr->size) && ((other_aggr->tot_size - other_aggr->size) >= other_aggr->alloc_size)) {
-                        if(H5MF__aggr_free(f, dxpl_id, other_alloc_type, other_aggr) < 0)
+                        if(H5MF__aggr_free(f, other_alloc_type, other_aggr) < 0)
                             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "can't free aggregation block")
 		    } /* end if */
 
                     /* Allocate space from the VFD (i.e. at the end of the file) */
-		    if(HADDR_UNDEF == (new_space = H5F_alloc(f, dxpl_id, alloc_type, aggr->alloc_size, &eoa_frag_addr, &eoa_frag_size)))
+		    if(HADDR_UNDEF == (new_space = H5F__alloc(f, alloc_type, aggr->alloc_size, &eoa_frag_addr, &eoa_frag_size)))
 			HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't allocate file space")
 
                     /* Return the unused portion of the block to a free list */
                     if(aggr->size > 0)
-                        if(H5MF_xfree(f, alloc_type, dxpl_id, aggr->addr, aggr->size) < 0)
+                        if(H5MF_xfree(f, alloc_type, aggr->addr, aggr->size) < 0)
                             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "can't free aggregation block")
 
                     /* If the block is not to be aligned, fold the eoa fragment
@@ -317,12 +315,12 @@ HDfprintf(stderr, "%s: Allocating block\n", FUNC);
 
 	    /* Freeing any possible fragment due to file allocation */
 	    if(eoa_frag_size)
-		if(H5MF_xfree(f, alloc_type, dxpl_id, eoa_frag_addr, eoa_frag_size) < 0)
+		if(H5MF_xfree(f, alloc_type, eoa_frag_addr, eoa_frag_size) < 0)
 		    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "can't free eoa fragment")
 
 	    /* Freeing any possible fragment due to alignment in the block after extension */
             if(extended && aggr_frag_size)
-		if(H5MF_xfree(f, alloc_type, dxpl_id, aggr_frag_addr, aggr_frag_size) < 0)
+		if(H5MF_xfree(f, alloc_type, aggr_frag_addr, aggr_frag_size) < 0)
 		    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "can't free aggregation fragment")
         } /* end if */
         else {
@@ -333,19 +331,19 @@ HDfprintf(stderr, "%s: Allocating block\n", FUNC);
 
 	    /* free any possible fragment */
 	    if(aggr_frag_size)
-		if(H5MF_xfree(f, alloc_type, dxpl_id, aggr_frag_addr, aggr_frag_size) < 0)
+		if(H5MF_xfree(f, alloc_type, aggr_frag_addr, aggr_frag_size) < 0)
 		    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "can't free aggregation fragment")
         } /* end else */
     } /* end if */
     else {
         /* Allocate data from the file */
-        if(HADDR_UNDEF == (ret_value = H5F_alloc(f, dxpl_id, type, size, &eoa_frag_addr, &eoa_frag_size)))
+        if(HADDR_UNDEF == (ret_value = H5F__alloc(f, type, size, &eoa_frag_addr, &eoa_frag_size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, HADDR_UNDEF, "can't allocate file space")
 
         /* Check if fragment was generated */
 	if(eoa_frag_size)
             /* Put fragment on the free list */
-	    if(H5MF_xfree(f, type, dxpl_id, eoa_frag_addr, eoa_frag_size) < 0)
+	    if(H5MF_xfree(f, type, eoa_frag_addr, eoa_frag_size) < 0)
 		HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, HADDR_UNDEF, "can't free eoa fragment")
     } /* end else */
 
@@ -365,7 +363,7 @@ HDfprintf(stderr, "%s: ret_value = %a\n", FUNC, ret_value);
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5MF_aggr_try_extend
+ * Function:    H5MF__aggr_try_extend
  *
  * Purpose:	Check if a block is inside an aggregator block and extend it
  *              if possible.
@@ -390,12 +388,12 @@ HDfprintf(stderr, "%s: ret_value = %a\n", FUNC, ret_value);
  *-------------------------------------------------------------------------
  */
 htri_t
-H5MF_aggr_try_extend(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr, 
+H5MF__aggr_try_extend(H5F_t *f, H5F_blk_aggr_t *aggr, 
     H5FD_mem_t type, haddr_t blk_end, hsize_t extra_requested)
 {
     htri_t ret_value = FALSE;           /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Check args */
     HDassert(f);
@@ -433,7 +431,7 @@ H5MF_aggr_try_extend(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr,
 		else {
 		    hsize_t extra = (extra_requested < aggr->alloc_size) ? aggr->alloc_size : extra_requested;
 
-                    if((ret_value = H5F_try_extend(f, dxpl_id, type, (aggr->addr + aggr->size), extra)) < 0)
+                    if((ret_value = H5F__try_extend(f, type, (aggr->addr + aggr->size), extra)) < 0)
 			HGOTO_ERROR(H5E_RESOURCE, H5E_CANTEXTEND, FAIL, "error extending file")
 		    else if(ret_value == TRUE) {
 			/* Shift the aggregator block by the extra requested */
@@ -469,7 +467,7 @@ H5MF_aggr_try_extend(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5MF_aggr_try_extend() */
+} /* end H5MF__aggr_try_extend() */
 
 
 /*-------------------------------------------------------------------------
@@ -650,7 +648,7 @@ H5MF_aggr_query(const H5F_t *f, const H5F_blk_aggr_t *aggr, haddr_t *addr,
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5MF_aggr_reset
+ * Function:    H5MF__aggr_reset
  *
  * Purpose:     Reset a block aggregator, returning any space back to file
  *
@@ -663,12 +661,12 @@ H5MF_aggr_query(const H5F_t *f, const H5F_blk_aggr_t *aggr, haddr_t *addr,
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF_aggr_reset(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr)
+H5MF__aggr_reset(H5F_t *f, H5F_blk_aggr_t *aggr)
 {
     H5FD_mem_t alloc_type;      /* Type of file memory to work with */
     herr_t ret_value = SUCCEED;	/* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check args */
     HDassert(f);
@@ -697,13 +695,13 @@ HDfprintf(stderr, "%s: tmp_addr = %a, tmp_size = %Hu\n", FUNC, tmp_addr, tmp_siz
 
         /* Return the unused portion of the metadata block to the file */
         if(tmp_size > 0 && (H5F_INTENT(f) & H5F_ACC_RDWR))
-            if(H5MF_xfree(f, alloc_type, dxpl_id, tmp_addr, tmp_size) < 0)
+            if(H5MF_xfree(f, alloc_type, tmp_addr, tmp_size) < 0)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't release aggregator's free space")
     } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5MF_aggr_reset() */
+} /* end H5MF__aggr_reset() */
 
 
 /*-------------------------------------------------------------------------
@@ -721,7 +719,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_free_aggrs(H5F_t *f, hid_t dxpl_id)
+H5MF_free_aggrs(H5F_t *f)
 {
     H5F_blk_aggr_t *first_aggr;         /* First aggregator to reset */
     H5F_blk_aggr_t *second_aggr;        /* Second aggregator to reset */
@@ -766,9 +764,9 @@ H5MF_free_aggrs(H5F_t *f, hid_t dxpl_id)
      /* Release the unused portion of the metadata and "small data" blocks back
       * to the free lists in the file.
       */
-    if(H5MF_aggr_reset(f, dxpl_id, first_aggr) < 0)
+    if(H5MF__aggr_reset(f, first_aggr) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFREE, FAIL, "can't reset metadata block")
-    if(H5MF_aggr_reset(f, dxpl_id, second_aggr) < 0)
+    if(H5MF__aggr_reset(f, second_aggr) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFREE, FAIL, "can't reset 'small data' block")
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -828,7 +826,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5MF__aggr_free(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, H5F_blk_aggr_t *aggr)
+H5MF__aggr_free(H5F_t *f, H5FD_mem_t type, H5F_blk_aggr_t *aggr)
 {
     herr_t ret_value = SUCCEED;   	/* Return value */
 
@@ -845,7 +843,7 @@ H5MF__aggr_free(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type, H5F_blk_aggr_t *aggr)
     HDassert(f->shared->feature_flags & aggr->feature_flag);
 
     /* Free the remaining space at EOA in the aggregator */
-    if(H5F_free(f, dxpl_id, type, aggr->addr, aggr->size) < 0)
+    if(H5F__free(f, type, aggr->addr, aggr->size) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't free aggregation block")
 
     /* Reset the aggregator */
@@ -872,7 +870,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5MF_aggrs_try_shrink_eoa(H5F_t *f, hid_t dxpl_id)
+H5MF_aggrs_try_shrink_eoa(H5F_t *f)
 {
     htri_t ma_status;        /* Whether the metadata aggregator can shrink the EOA */
     htri_t sda_status;       /* Whether the small data aggregator can shrink the EOA */
@@ -887,13 +885,13 @@ H5MF_aggrs_try_shrink_eoa(H5F_t *f, hid_t dxpl_id)
     if((ma_status = H5MF_aggr_can_shrink_eoa(f, H5FD_MEM_DEFAULT, &(f->shared->meta_aggr))) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGET, FAIL, "can't query metadata aggregator stats")
     if(ma_status > 0)
-	if(H5MF__aggr_free(f, dxpl_id, H5FD_MEM_DEFAULT, &(f->shared->meta_aggr)) < 0)
+	if(H5MF__aggr_free(f, H5FD_MEM_DEFAULT, &(f->shared->meta_aggr)) < 0)
 	    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't check for shrinking eoa")
 
     if((sda_status = H5MF_aggr_can_shrink_eoa(f, H5FD_MEM_DRAW, &(f->shared->sdata_aggr))) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTGET, FAIL, "can't query small data aggregator stats")
     if(sda_status > 0)
-	if(H5MF__aggr_free(f, dxpl_id, H5FD_MEM_DRAW, &(f->shared->sdata_aggr)) < 0)
+	if(H5MF__aggr_free(f, H5FD_MEM_DRAW, &(f->shared->sdata_aggr)) < 0)
 	    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTSHRINK, FAIL, "can't check for shrinking eoa")
 
     ret_value = (ma_status || sda_status);
diff --git a/src/H5MFdbg.c b/src/H5MFdbg.c
index 817ea00..592ca87 100644
--- a/src/H5MFdbg.c
+++ b/src/H5MFdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -155,12 +153,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t fs_addr, FILE *stream, int indent, int fwidth)
+H5MF_sects_debug(H5F_t *f, haddr_t fs_addr, FILE *stream, int indent, int fwidth)
 {
+    H5F_mem_page_t type;                /* Memory type for iteration */
     herr_t      ret_value = SUCCEED;    /* Return value */
-    H5FD_mem_t 	type;                    /* Memory type for iteration */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 
     /*
      * Check arguments.
@@ -170,34 +168,34 @@ H5MF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t fs_addr, FILE *stream, int ind
     HDassert(indent >= 0);
     HDassert(fwidth >= 0);
 
-    for(type = H5FD_MEM_DEFAULT; type < H5FD_MEM_NTYPES; H5_INC_ENUM(H5FD_mem_t, type))
-	if(H5F_addr_eq(f->shared->fs_addr[type], fs_addr)) {
-	    if(!f->shared->fs_man[type])
-                if(H5MF_open_fstype(f, dxpl_id, type) < 0)
-		    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space")
+    for(type = H5F_MEM_PAGE_DEFAULT; type < H5F_MEM_PAGE_NTYPES; H5_INC_ENUM(H5F_mem_page_t, type))
+        if(H5F_addr_eq(f->shared->fs_addr[type], fs_addr)) {
+            if(!f->shared->fs_man[type])
+                if(H5MF__open_fstype(f, type) < 0)
+                    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "can't initialize file free space")
 
-	    if(f->shared->fs_man[type]) {
-		H5MF_debug_iter_ud_t udata;        /* User data for callbacks */
+            if(f->shared->fs_man[type]) {
+                H5MF_debug_iter_ud_t udata;        /* User data for callbacks */
 
-		/* Prepare user data for section iteration callback */
-		udata.fspace = f->shared->fs_man[type];
-		udata.stream = stream;
-		udata.indent = indent;
-		udata.fwidth = fwidth;
+                /* Prepare user data for section iteration callback */
+                udata.fspace = f->shared->fs_man[type];
+                udata.stream = stream;
+                udata.indent = indent;
+                udata.fwidth = fwidth;
 
-		/* Iterate over all the free space sections */
-		if(H5FS_sect_iterate(f, dxpl_id, f->shared->fs_man[type], H5MF_sects_debug_cb, &udata) < 0)
-		    HGOTO_ERROR(H5E_HEAP, H5E_BADITER, FAIL, "can't iterate over heap's free space")
+                /* Iterate over all the free space sections */
+                if(H5FS_sect_iterate(f, f->shared->fs_man[type], H5MF_sects_debug_cb, &udata) < 0)
+                    HGOTO_ERROR(H5E_HEAP, H5E_BADITER, FAIL, "can't iterate over heap's free space")
 
-		/* Close the free space information */
-		if(H5FS_close(f, dxpl_id, f->shared->fs_man[type]) < 0)
-		    HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release free space info")
-	    } /* end if */
-	    break;
-	} /* end if */
+                /* Close the free space information */
+                if(H5FS_close(f, f->shared->fs_man[type]) < 0)
+                    HGOTO_ERROR(H5E_HEAP, H5E_CANTRELEASE, FAIL, "can't release free space info")
+            } /* end if */
+            break;
+        } /* end if */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* H5MF_sects_debug() */
 
 #ifdef H5MF_ALLOC_DEBUG_DUMP
@@ -216,14 +214,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5MF_sects_dump(H5F_t *f, hid_t dxpl_id, FILE *stream)
+H5MF_sects_dump(H5F_t *f, FILE *stream)
 {
     haddr_t eoa;                        /* End of allocated space in the file */
     int indent = 0;                     /* Amount to indent */
     int fwidth = 50;                    /* Field width */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__FREESPACE_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__FREESPACE_TAG, FAIL)
 #ifdef H5MF_ALLOC_DEBUG
 HDfprintf(stderr, "%s: Dumping file free space sections\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG */
@@ -262,7 +260,7 @@ HDfprintf(stderr, "%s: for type = H5FD_MEM_DEFAULT, eoa = %a\n", FUNC, eoa);
                 udata.fwidth = MAX(0, fwidth - 6);
 
                 /* Iterate over all the free space sections */
-                if(H5FS_sect_iterate(f, dxpl_id, f->shared->fs_man[ptype], H5MF_sects_debug_cb, &udata) < 0)
+                if(H5FS_sect_iterate(f, f->shared->fs_man[ptype], H5MF_sects_debug_cb, &udata) < 0)
                     HGOTO_ERROR(H5E_HEAP, H5E_BADITER, FAIL, "can't iterate over heap's free space")
             } /* end if */
             else
@@ -315,7 +313,7 @@ HDfprintf(stderr, "%s: sda_addr = %a, sda_size = %Hu, end of sda = %a\n", FUNC,
                     udata.fwidth = MAX(0, fwidth - 6);
 
                     /* Iterate over all the free space sections */
-                    if(H5FS_sect_iterate(f, dxpl_id, f->shared->fs_man[atype], H5MF_sects_debug_cb, &udata) < 0)
+                    if(H5FS_sect_iterate(f, f->shared->fs_man[atype], H5MF_sects_debug_cb, &udata) < 0)
                         HGOTO_ERROR(H5E_HEAP, H5E_BADITER, FAIL, "can't iterate over heap's free space")
                 } /* end if */
                 else /* No sections of this type */
@@ -328,7 +326,7 @@ HDfprintf(stderr, "%s: sda_addr = %a, sda_size = %Hu, end of sda = %a\n", FUNC,
 
 done:
 HDfprintf(stderr, "%s: Done dumping file free space sections\n", FUNC);
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5MF_sects_dump() */
 #endif /* H5MF_ALLOC_DEBUG_DUMP */
 
diff --git a/src/H5MFmodule.h b/src/H5MFmodule.h
index 6e5f8ad..53daabf 100644
--- a/src/H5MFmodule.h
+++ b/src/H5MFmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5MFpkg.h b/src/H5MFpkg.h
index c4a0819..fbf9ee8 100644
--- a/src/H5MFpkg.h
+++ b/src/H5MFpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -148,7 +146,6 @@ typedef enum {
 typedef struct H5MF_sect_ud_t {
     /* Down */
     H5F_t *f;                   /* Pointer to file to operate on */
-    hid_t dxpl_id;              /* DXPL for VFD operations */
     H5FD_mem_t alloc_type;      /* Type of memory being allocated */
     hbool_t allow_sect_absorb;  /* Whether sections are allowed to absorb a block aggregator */
     hbool_t allow_eoa_shrink_only;  /* Whether shrinking eoa is allowed only for the section */
@@ -183,13 +180,13 @@ H5_DLLVAR H5FS_section_class_t H5MF_FSPACE_SECT_CLS_LARGE[1];
 /******************************/
 
 /* Allocator routines */
-H5_DLL herr_t H5MF_open_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type);
-H5_DLL herr_t H5MF_start_fstype(H5F_t *f, hid_t dxpl_id, H5F_mem_page_t type);
+H5_DLL herr_t H5MF__open_fstype(H5F_t *f, H5F_mem_page_t type);
+H5_DLL herr_t H5MF__start_fstype(H5F_t *f, H5F_mem_page_t type);
 
-H5_DLL htri_t H5MF_find_sect(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, hsize_t size, H5FS_t *fspace, haddr_t *addr);
-H5_DLL herr_t H5MF_add_sect(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id, H5FS_t *fspace, H5MF_free_section_t *node);
+H5_DLL htri_t H5MF__find_sect(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size, H5FS_t *fspace, haddr_t *addr);
+H5_DLL herr_t H5MF__add_sect(H5F_t *f, H5FD_mem_t alloc_type, H5FS_t *fspace, H5MF_free_section_t *node);
 
-H5_DLL herr_t H5MF_sects_dump(H5F_t *f, hid_t dxpl_id, FILE *stream);
+H5_DLL herr_t H5MF_sects_dump(H5F_t *f, FILE *stream);
 
 H5_DLL void H5MF_alloc_to_fs_type(H5F_t *f, H5FD_mem_t alloc_type, hsize_t size, H5F_mem_page_t *fs_type);
 
@@ -200,7 +197,7 @@ H5_DLL herr_t H5MF_sect_free(H5FS_section_info_t *sect);
 
 
 /* Block aggregator routines */
-H5_DLL htri_t H5MF_aggr_try_extend(H5F_t *f, hid_t dxpl_id, H5F_blk_aggr_t *aggr,
+H5_DLL htri_t H5MF__aggr_try_extend(H5F_t *f, H5F_blk_aggr_t *aggr,
     H5FD_mem_t type, haddr_t abs_blk_end, hsize_t extra_requested);
 H5_DLL htri_t H5MF_aggr_can_absorb(const H5F_t *f, const H5F_blk_aggr_t *aggr,
     const H5MF_free_section_t *sect, H5MF_shrink_type_t *shrink);
diff --git a/src/H5MFprivate.h b/src/H5MFprivate.h
index 70322c3..58e5054 100644
--- a/src/H5MFprivate.h
+++ b/src/H5MFprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -51,32 +49,32 @@
 
 /* File space manager routines */
 H5_DLL herr_t H5MF_init_merge_flags(H5F_t *f);
-H5_DLL herr_t H5MF_get_freespace(H5F_t *f, hid_t dxpl_id, hsize_t *tot_space, hsize_t *meta_size);
-H5_DLL herr_t H5MF_close(H5F_t *f, hid_t dxpl_id);
-H5_DLL herr_t H5MF_try_close(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5MF_get_freespace(H5F_t *f, hsize_t *tot_space, hsize_t *meta_size);
+H5_DLL herr_t H5MF_close(H5F_t *f);
+H5_DLL herr_t H5MF_try_close(H5F_t *f);
 
 /* File space allocation routines */
-H5_DLL haddr_t H5MF_alloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
-H5_DLL haddr_t H5MF_aggr_vfd_alloc(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, hsize_t size);
-H5_DLL herr_t H5MF_xfree(H5F_t *f, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
+H5_DLL haddr_t H5MF_alloc(H5F_t *f, H5FD_mem_t type, hsize_t size);
+H5_DLL haddr_t H5MF_aggr_vfd_alloc(H5F_t *f, H5FD_mem_t type, hsize_t size);
+H5_DLL herr_t H5MF_xfree(H5F_t *f, H5FD_mem_t type, haddr_t addr,
     hsize_t size);
-H5_DLL herr_t H5MF_try_extend(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type,
-    haddr_t addr, hsize_t size, hsize_t extra_requested);
-H5_DLL htri_t H5MF_try_shrink(H5F_t *f, H5FD_mem_t alloc_type, hid_t dxpl_id,
-    haddr_t addr, hsize_t size);
-H5_DLL ssize_t H5MF_get_free_sections(H5F_t *f, hid_t dxpl_id, H5FD_mem_t type,
-    size_t nsects, H5F_sect_info_t *sect_info);
+H5_DLL herr_t H5MF_try_extend(H5F_t *f, H5FD_mem_t type, haddr_t addr,
+    hsize_t size, hsize_t extra_requested);
+H5_DLL htri_t H5MF_try_shrink(H5F_t *f, H5FD_mem_t alloc_type, haddr_t addr,
+    hsize_t size);
+H5_DLL ssize_t H5MF_get_free_sections(H5F_t *f, H5FD_mem_t type, size_t nsects,
+    H5F_sect_info_t *sect_info);
 
 /* File 'temporary' space allocation routines */
 H5_DLL haddr_t H5MF_alloc_tmp(H5F_t *f, hsize_t size);
 
 /* 'block aggregator' routines */
-H5_DLL herr_t H5MF_free_aggrs(H5F_t *f, hid_t dxpl_id);
-H5_DLL htri_t H5MF_aggrs_try_shrink_eoa(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5MF_free_aggrs(H5F_t *f);
+H5_DLL htri_t H5MF_aggrs_try_shrink_eoa(H5F_t *f);
 
 /* Free space manager settling routines */
-H5_DLL herr_t H5MF_settle_raw_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled);
-H5_DLL herr_t H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_settled);
+H5_DLL herr_t H5MF_settle_raw_data_fsm(H5F_t *f, hbool_t *fsm_settled);
+H5_DLL herr_t H5MF_settle_meta_data_fsm(H5F_t *f, hbool_t *fsm_settled);
 
 /* This function has to be declared in H5MFprivate.h as it is needed 
  * in our test code to allow us to manually start a self referential 
@@ -84,12 +82,12 @@ H5_DLL herr_t H5MF_settle_meta_data_fsm(H5F_t *f, hid_t dxpl_id, hbool_t *fsm_se
  * deallocation without causing assertion failures on the first
  * file space allocation / deallocation.
  */
-H5_DLL herr_t H5MF_tidy_self_referential_fsm_hack(H5F_t *f, hid_t dxpl_id);
+H5_DLL herr_t H5MF_tidy_self_referential_fsm_hack(H5F_t *f);
 
 /* Debugging routines */
 #ifdef H5MF_DEBUGGING
-H5_DLL herr_t H5MF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
-    FILE *stream, int indent, int fwidth);
+H5_DLL herr_t H5MF_sects_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent,
+    int fwidth);
 #endif /* H5MF_DEBUGGING */
 
 #endif /* end _H5MFprivate_H */
diff --git a/src/H5MFsection.c b/src/H5MFsection.c
index 617cb59..fe140a7 100644
--- a/src/H5MFsection.c
+++ b/src/H5MFsection.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -59,10 +57,9 @@
 
 /* 'simple/small/large' section callbacks */
 static H5FS_section_info_t *H5MF_sect_deserialize(const H5FS_section_class_t *cls,
-    hid_t dxpl_id, const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size,
-    unsigned *des_flags);
+    const uint8_t *buf, haddr_t sect_addr, hsize_t sect_size, unsigned *des_flags);
 static herr_t H5MF_sect_valid(const H5FS_section_class_t *cls,
-    const H5FS_section_info_t *sect, hid_t dxpl_id);
+    const H5FS_section_info_t *sect);
 static H5FS_section_info_t *H5MF_sect_split(H5FS_section_info_t *sect,
     hsize_t frag_size);
 
@@ -132,27 +129,27 @@ H5FS_section_class_t H5MF_FSPACE_SECT_CLS_SIMPLE[1] = {{
 /* Class info for "small" free space sections */
 H5FS_section_class_t H5MF_FSPACE_SECT_CLS_SMALL[1] = {{
     /* Class variables */
-    H5MF_FSPACE_SECT_SMALL,		/* Section type                 */
-    0,					/* Extra serialized size        */
-    H5FS_CLS_MERGE_SYM | H5FS_CLS_ADJUST_OK, /* Class flags                  */
-    NULL,				/* Class private info           */
+    H5MF_FSPACE_SECT_SMALL,     /* Section type                 */
+    0,                          /* Extra serialized size        */
+    H5FS_CLS_MERGE_SYM | H5FS_CLS_ADJUST_OK,    /* Class flags                  */
+    NULL,                       /* Class private info           */
 
     /* Class methods */
-    NULL,				/* Initialize section class     */
-    NULL,				/* Terminate section class      */
+    NULL,                       /* Initialize section class     */
+    NULL,                       /* Terminate section class      */
 
     /* Object methods */
-    H5MF_sect_small_add,		/* Add section                  */
-    NULL,				/* Serialize section            */
+    H5MF_sect_small_add,        /* Add section                  */
+    NULL,                       /* Serialize section            */
     H5MF_sect_deserialize,		/* Deserialize section          */
-    H5MF_sect_small_can_merge,		/* Can sections merge?          */
-    H5MF_sect_small_merge,		/* Merge sections               */
-    H5MF_sect_small_can_shrink,		/* Can section shrink container?*/
-    H5MF_sect_small_shrink,		/* Shrink container w/section   */
-    H5MF_sect_free,			/* Free section                 */
-    H5MF_sect_valid,			/* Check validity of section    */
-    H5MF_sect_split,			/* Split section node for alignment */
-    NULL,				/* Dump debugging for section   */
+    H5MF_sect_small_can_merge,  /* Can sections merge?          */
+    H5MF_sect_small_merge,      /* Merge sections               */
+    NULL,			/* Can section shrink container?*/
+    NULL,			/* Shrink container w/section   */
+    H5MF_sect_free,             /* Free section                 */
+    H5MF_sect_valid,            /* Check validity of section    */
+    H5MF_sect_split,            /* Split section node for alignment */
+    NULL,                       /* Dump debugging for section   */
 }};
 
 /* Class info for "large" free space sections */
@@ -287,7 +284,7 @@ H5MF_sect_free(H5FS_section_info_t *_sect)
  */
 static H5FS_section_info_t *
 H5MF_sect_deserialize(const H5FS_section_class_t *cls,
-    hid_t H5_ATTR_UNUSED dxpl_id, const uint8_t H5_ATTR_UNUSED *buf, haddr_t sect_addr,
+    const uint8_t H5_ATTR_UNUSED *buf, haddr_t sect_addr,
     hsize_t sect_size, unsigned H5_ATTR_UNUSED *des_flags)
 {
     H5MF_free_section_t *sect;          /* New section */
@@ -331,7 +328,7 @@ H5MF_sect_valid(const H5FS_section_class_t H5_ATTR_UNUSED *cls,
 #ifdef NDEBUG
     H5_ATTR_UNUSED
 #endif /* NDEBUG */
-    *_sect, hid_t H5_ATTR_UNUSED dxpl_id)
+    *_sect)
 {
 #ifndef NDEBUG
     const H5MF_free_section_t *sect = (const H5MF_free_section_t *)_sect;   /* File free section */
@@ -362,7 +359,7 @@ H5MF_sect_valid(const H5FS_section_class_t H5_ATTR_UNUSED *cls,
 static H5FS_section_info_t *
 H5MF_sect_split(H5FS_section_info_t *sect, hsize_t frag_size)
 {
-    H5MF_free_section_t *ret_value;     /* Return value */
+    H5MF_free_section_t *ret_value = NULL;      /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
@@ -596,7 +593,7 @@ H5MF_sect_simple_shrink(H5FS_section_info_t **_sect, void *_udata)
         HDassert(H5F_INTENT(udata->f) & H5F_ACC_RDWR);
 
         /* Release section's space at EOA */
-        if(H5F_free(udata->f, udata->dxpl_id, udata->alloc_type, (*sect)->sect_info.addr, (*sect)->sect_info.size) < 0)
+        if(H5F__free(udata->f, udata->alloc_type, (*sect)->sect_info.addr, (*sect)->sect_info.size) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "driver free request failed")
     } /* end if */
     else {
@@ -676,7 +673,7 @@ HDfprintf(stderr, "%s: Entering, section {%a, %Hu}\n", FUNC, (*sect)->sect_info.
 HDfprintf(stderr, "%s: section is dropped\n", FUNC);
 #endif /* H5MF_ALLOC_DEBUG_MORE */
     } /* end if */
-    /* Adjust the section if it is not at page end but its size + pgend threshold is at page end */
+    /* Adjust the section if it is not at page end but its size + prem is at page end */
     else
         if(prem <= H5F_PGEND_META_THRES(udata->f)) {
             (*sect)->sect_info.size += prem;
@@ -697,6 +694,12 @@ done:
  *
  * Note: 	A small section is allowed to shrink only at closing.
  *
+ * Note:	This is unused currently, to maintain the invariant that the
+ *		file size is always a multiple of the page size.
+ *
+ *		(This function should probably be deleted, or the invariant
+ *		relaxed)
+ *
  * Return:	Success:	non-negative (TRUE/FALSE)
  *          Failure:	negative
  *
@@ -749,6 +752,12 @@ done:
  *
  * Purpose:	Shrink container with section
  *
+ * Note:	This is unused currently, to maintain the invariant that the
+ *		file size is always a multiple of the page size.
+ *
+ *		(This function should probably be deleted, or the invariant
+ *		relaxed)
+ *
  * Return:	Success:	non-negative
  *          Failure:	negative 
  * 
@@ -774,7 +783,7 @@ H5MF_sect_small_shrink(H5FS_section_info_t **_sect, void *_udata)
     HDassert(H5F_INTENT(udata->f) & H5F_ACC_RDWR);
 
     /* Release section's space at EOA */
-    if(H5F_free(udata->f, udata->dxpl_id, udata->alloc_type, (*sect)->sect_info.addr, (*sect)->sect_info.size) < 0)
+    if(H5F__free(udata->f, udata->alloc_type, (*sect)->sect_info.addr, (*sect)->sect_info.size) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "driver free request failed")
 
     /* Free section */
@@ -874,7 +883,7 @@ H5MF_sect_small_merge(H5FS_section_info_t **_sect1, H5FS_section_info_t *_sect2,
     (*sect1)->sect_info.size += sect2->sect_info.size;
 
     if((*sect1)->sect_info.size == udata->f->shared->fs_page_size) {
-        if(H5MF_xfree(udata->f, udata->alloc_type, udata->dxpl_id, (*sect1)->sect_info.addr, (*sect1)->sect_info.size) < 0)
+        if(H5MF_xfree(udata->f, udata->alloc_type, (*sect1)->sect_info.addr, (*sect1)->sect_info.size) < 0)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "can't free merged section")
 
         /* Need to free possible metadata page in the PB cache */
@@ -1075,7 +1084,7 @@ H5MF_sect_large_shrink(H5FS_section_info_t **_sect, void *_udata)
 
     /* Free full pages from EOA */
     /* Retain partial page in the free-space manager so as to keep EOA at page boundary */
-    if(H5F_free(udata->f, udata->dxpl_id, udata->alloc_type, (*sect)->sect_info.addr+frag_size, (*sect)->sect_info.size-frag_size) < 0)
+    if(H5F__free(udata->f, udata->alloc_type, (*sect)->sect_info.addr+frag_size, (*sect)->sect_info.size-frag_size) < 0)
         HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "driver free request failed")
 
     if(frag_size) /* Adjust section size for the partial page */
diff --git a/src/H5MM.c b/src/H5MM.c
index daef7b1..866dfbe 100644
--- a/src/H5MM.c
+++ b/src/H5MM.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -270,8 +268,6 @@ H5MM_malloc(size_t size)
 {
     void *ret_value = NULL;
 
-    HDassert(size);
-
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -359,8 +355,6 @@ H5MM_calloc(size_t size)
 {
     void *ret_value = NULL;
 
-    HDassert(size);
-
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -409,8 +403,6 @@ H5MM_realloc(void *mem, size_t size)
     /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    HDassert(mem || size);
-
     if(NULL == mem && 0 == size)
         /* Not defined in the standard, return NULL */
         ret_value = NULL;
@@ -456,7 +448,7 @@ H5MM_realloc(void *mem, size_t size)
  *              NULL is an acceptable value for the input string.
  *
  * Return:      Success:    Pointer to a new string (NULL if s is NULL).
- *              Failure:    abort()
+ *              Failure:    NULL
  *
  * Programmer:  Robb Matzke
  *              Jul 10 1997
diff --git a/src/H5MMprivate.h b/src/H5MMprivate.h
index 14bd28d..0524601 100644
--- a/src/H5MMprivate.h
+++ b/src/H5MMprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5MMpublic.h b/src/H5MMpublic.h
index bfcb807..4e54c33 100644
--- a/src/H5MMpublic.h
+++ b/src/H5MMpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5MP.c b/src/H5MP.c
index 50fc598..8c9b411 100644
--- a/src/H5MP.c
+++ b/src/H5MP.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5MPmodule.h b/src/H5MPmodule.h
index ca6c405..27f7706 100644
--- a/src/H5MPmodule.h
+++ b/src/H5MPmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5MPpkg.h b/src/H5MPpkg.h
index e724146..29a25fa 100644
--- a/src/H5MPpkg.h
+++ b/src/H5MPpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5MPprivate.h b/src/H5MPprivate.h
index 3fa312c..009cb50 100644
--- a/src/H5MPprivate.h
+++ b/src/H5MPprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5MPtest.c b/src/H5MPtest.c
index 3f218db..b3f2e24 100644
--- a/src/H5MPtest.c
+++ b/src/H5MPtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
diff --git a/src/H5O.c b/src/H5O.c
index 1b58703..f700ac9 100644
--- a/src/H5O.c
+++ b/src/H5O.c
@@ -5,21 +5,17 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
  *
- * Created:		H5O.c
- *			Aug  5 1997
- *			Robb Matzke <matzke@llnl.gov>
+ * Created:     H5O.c
  *
- * Purpose:		Object header routines.
+ * Purpose:     Public object header routines
  *
  *-------------------------------------------------------------------------
  */
@@ -34,19 +30,13 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* File access				*/
-#include "H5FLprivate.h"	/* Free lists                           */
-#include "H5FOprivate.h"        /* File objects                         */
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5Lprivate.h"		/* Links				*/
-#include "H5MFprivate.h"	/* File memory management		*/
-#ifdef H5O_ENABLE_BOGUS
-#include "H5MMprivate.h"	/* Memory management			*/
-#endif /* H5O_ENABLE_BOGUS */
-#include "H5Opkg.h"             /* Object headers			*/
-#include "H5SMprivate.h"        /* Shared object header messages        */
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5CXprivate.h"        /* API Contexts                             */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Fprivate.h"         /* File access                              */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Lprivate.h"         /* Links                                    */
+#include "H5Opkg.h"             /* Object headers                           */
 
 
 /****************/
@@ -58,17 +48,6 @@
 /* Local Typedefs */
 /******************/
 
-/* User data for recursive traversal over objects from a group */
-typedef struct {
-    hid_t       obj_id;         /* The ID for the starting group */
-    H5G_loc_t	*start_loc;     /* Location of starting group */
-    hid_t       lapl_id;        /* LAPL for walking across links */
-    hid_t       dxpl_id; 	/* DXPL for operations */
-    H5SL_t     *visited;        /* Skip list for tracking visited nodes */
-    H5O_iterate_t op;           /* Application callback */
-    void       *op_data;        /* Application's op data */
-} H5O_iter_visit_ud_t;
-
 
 /********************/
 /* Package Typedefs */
@@ -79,137 +58,21 @@ typedef struct {
 /* Local Prototypes */
 /********************/
 
-static herr_t H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
-static herr_t H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type);
-static herr_t H5O_visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
-    H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id,
-    hid_t dxpl_id);
-static herr_t H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr);
-static const H5O_obj_class_t *H5O_obj_class_real(H5O_t *oh);
-
 
 /*********************/
 /* Package Variables */
 /*********************/
 
-/* Package initialization variable */
-hbool_t H5_PKG_INIT_VAR = FALSE;
-
-/* Header message ID to class mapping */
-
-/* Remember to increment H5O_MSG_TYPES in H5Opkg.h when adding a new
- * message.
- */
-
-const H5O_msg_class_t *const H5O_msg_class_g[] = {
-    H5O_MSG_NULL,		/*0x0000 Null				*/
-    H5O_MSG_SDSPACE,		/*0x0001 Dataspace			*/
-    H5O_MSG_LINFO,		/*0x0002 Link information		*/
-    H5O_MSG_DTYPE,		/*0x0003 Datatype			*/
-    H5O_MSG_FILL,       	/*0x0004 Old data storage -- fill value */
-    H5O_MSG_FILL_NEW,		/*0x0005 New data storage -- fill value */
-    H5O_MSG_LINK,		/*0x0006 Link 				*/
-    H5O_MSG_EFL,		/*0x0007 Data storage -- external data files */
-    H5O_MSG_LAYOUT,		/*0x0008 Data Layout			*/
-#ifdef H5O_ENABLE_BOGUS
-    H5O_MSG_BOGUS_VALID,	/*0x0009 "Bogus valid" (for testing)	*/
-#else /* H5O_ENABLE_BOGUS */
-    NULL,			/*0x0009 "Bogus valid" (for testing)	*/
-#endif /* H5O_ENABLE_BOGUS */
-    H5O_MSG_GINFO,		/*0x000A Group information		*/
-    H5O_MSG_PLINE,		/*0x000B Data storage -- filter pipeline */
-    H5O_MSG_ATTR,		/*0x000C Attribute			*/
-    H5O_MSG_NAME,		/*0x000D Object name			*/
-    H5O_MSG_MTIME,		/*0x000E Object modification date and time */
-    H5O_MSG_SHMESG,		/*0x000F File-wide shared message table */
-    H5O_MSG_CONT,		/*0x0010 Object header continuation	*/
-    H5O_MSG_STAB,		/*0x0011 Symbol table			*/
-    H5O_MSG_MTIME_NEW,		/*0x0012 New Object modification date and time */
-    H5O_MSG_BTREEK,		/*0x0013 Non-default v1 B-tree 'K' values */
-    H5O_MSG_DRVINFO,		/*0x0014 Driver info settings		*/
-    H5O_MSG_AINFO,		/*0x0015 Attribute information		*/
-    H5O_MSG_REFCOUNT,		/*0x0016 Object's ref. count		*/
-    H5O_MSG_FSINFO,		/*0x0017 Free-space manager info        */
-    H5O_MSG_MDCI,               /*0x0018 Metadata cache image           */
-    H5O_MSG_UNKNOWN,		/*0x0019 Placeholder for unknown message */
-#ifdef H5O_ENABLE_BOGUS
-    H5O_MSG_BOGUS_INVALID, 	/*0x001A "Bogus invalid" (for testing) 	*/
-#else /* H5O_ENABLE_BOGUS */
-    NULL,                       /*0x001A "Bogus invalid" (for testing) 	*/
-#endif /* H5O_ENABLE_BOGUS */
-};
-
-/* Declare a free list to manage the H5O_t struct */
-H5FL_DEFINE(H5O_t);
-
-/* Declare a free list to manage the H5O_mesg_t sequence information */
-H5FL_SEQ_DEFINE(H5O_mesg_t);
-
-/* Declare a free list to manage the H5O_chunk_t sequence information */
-H5FL_SEQ_DEFINE(H5O_chunk_t);
-
-/* Declare a free list to manage the chunk image information */
-H5FL_BLK_DEFINE(chunk_image);
-
-/* Declare external the free list for H5O_cont_t sequences */
-H5FL_SEQ_EXTERN(H5O_cont_t);
-
 
 /*****************************/
 /* Library Private Variables */
 /*****************************/
 
-/* Declare external the free list for time_t's */
-H5FL_EXTERN(time_t);
-
-/* Declare external the free list for H5_obj_t's */
-H5FL_EXTERN(H5_obj_t);
-
 
 /*******************/
 /* Local Variables */
 /*******************/
 
-/* Header object ID to class mapping */
-/*
- * Initialize the object class info table.  Begin with the most general types
- * and end with the most specific. For instance, any object that has a
- * datatype message is a datatype but only some of them are datasets.
- */
-static const H5O_obj_class_t *const H5O_obj_class_g[] = {
-    H5O_OBJ_DATATYPE,		/* Datatype object (H5O_TYPE_NAMED_DATATYPE - 2) */
-    H5O_OBJ_DATASET,		/* Dataset object (H5O_TYPE_DATASET - 1) */
-    H5O_OBJ_GROUP,		/* Group object (H5O_TYPE_GROUP - 0) */
-};
-
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O__init_package
- *
- * Purpose:	Initialize information specific to H5O interface.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Thursday, January 18, 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O__init_package(void)
-{
-    FUNC_ENTER_PACKAGE_NOERR
-
-    /* H5O interface sanity checks */
-    HDcompile_assert(H5O_MSG_TYPES == NELMTS(H5O_msg_class_g));
-    HDcompile_assert(sizeof(H5O_fheap_id_t) == H5O_FHEAP_ID_LEN);
-
-    HDcompile_assert(H5O_UNKNOWN_ID < H5O_MSG_TYPES);
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O__init_package() */
-
 
 /*-------------------------------------------------------------------------
  * Function:	H5Oopen
@@ -236,8 +99,7 @@ H5O__init_package(void)
 hid_t
 H5Oopen(hid_t loc_id, const char *name, hid_t lapl_id)
 {
-    H5G_loc_t	loc;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
+    H5G_loc_t	loc;                    /* Location of group */
     hid_t       ret_value = FAIL;
 
     FUNC_ENTER_API(FAIL)
@@ -249,12 +111,12 @@ H5Oopen(hid_t loc_id, const char *name, hid_t lapl_id)
     if(!name || !*name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Open the object */
-    if((ret_value = H5O_open_name(&loc, name, lapl_id, dxpl_id, TRUE)) < 0)
+    if((ret_value = H5O__open_name(&loc, name)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
 
 done:
@@ -289,12 +151,7 @@ hid_t
 H5Oopen_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     H5_iter_order_t order, hsize_t n, hid_t lapl_id)
 {
-    H5G_loc_t	loc;
-    H5G_loc_t   obj_loc;                /* Location used to open group */
-    H5G_name_t  obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Opened object object location */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
-    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
+    H5G_loc_t	loc;                    /* Location of group */
     hid_t       ret_value = FAIL;
 
     FUNC_ENTER_API(FAIL)
@@ -304,36 +161,21 @@ H5Oopen_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     if(H5G_loc(loc_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
     if(!group_name || !*group_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
-
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
 
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location, according to the order in the index */
-    if(H5G_loc_find_by_idx(&loc, group_name, idx_type, order, n, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "group not found")
-    loc_found = TRUE;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, H5I_INVALID_HID, "can't set access property list info")
 
     /* Open the object */
-    if((ret_value = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, TRUE)) < 0)
+    if((ret_value = H5O__open_by_idx(&loc, group_name, idx_type, order, n)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
 
 done:
-    /* Release the object location if we failed after copying it */
-    if(ret_value < 0 && loc_found)
-        if(H5G_loc_free(&obj_loc) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
-
     FUNC_LEAVE_API(ret_value)
 } /* end H5Oopen_by_idx() */
 
@@ -376,36 +218,23 @@ done:
 hid_t
 H5Oopen_by_addr(hid_t loc_id, haddr_t addr)
 {
-    H5G_loc_t	loc;
-    H5G_loc_t   obj_loc;                /* Location used to open group */
-    H5G_name_t  obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Opened object object location */
-    hid_t       lapl_id = H5P_LINK_ACCESS_DEFAULT; /* lapl to use to open this object */
-    hid_t       ret_value = FAIL;
+    H5G_loc_t	loc;                    /* Location within file */
+    hid_t       ret_value = H5I_INVALID_HID;	/* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("i", "ia", loc_id, addr);
 
     /* Check args */
     if(H5G_loc(loc_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
     if(!H5F_addr_defined(addr))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no address supplied")
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-    obj_loc.oloc->addr = addr;
-    obj_loc.oloc->file = loc.oloc->file;
-    H5G_name_reset(obj_loc.path);       /* objects opened through this routine don't have a path name */
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "no address supplied")
 
     /* Open the object */
-    if((ret_value = H5O_open_by_loc(&obj_loc, lapl_id, H5AC_ind_read_dxpl_id, TRUE)) < 0)
+    if((ret_value = H5O__open_by_addr(&loc, addr)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
 
 done:
-
     FUNC_LEAVE_API(ret_value)
 } /* end H5Oopen_by_addr() */
 
@@ -435,9 +264,8 @@ herr_t
 H5Olink(hid_t obj_id, hid_t new_loc_id, const char *new_name, hid_t lcpl_id,
     hid_t lapl_id)
 {
-    H5G_loc_t	new_loc;
-    H5G_loc_t	obj_loc;
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
+    H5G_loc_t	new_loc;		/* Location of group to link from */
+    H5G_loc_t	obj_loc;		/* Location of object to link to */
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -460,12 +288,12 @@ H5Olink(hid_t obj_id, hid_t new_loc_id, const char *new_name, hid_t lcpl_id,
     if(lcpl_id != H5P_DEFAULT && (TRUE != H5P_isa_class(lcpl_id, H5P_LINK_CREATE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a link creation property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, obj_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, obj_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Link to the object */
-    if(H5L_link(&new_loc, new_name, &obj_loc, lcpl_id, lapl_id, dxpl_id) < 0)
+    /* Create a link to the object */
+    if(H5O__create_link(&new_loc, new_name, &obj_loc, lcpl_id) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to create link")
 
 done:
@@ -496,8 +324,8 @@ done:
 herr_t
 H5Oincr_refcount(hid_t object_id)
 {
-    H5O_loc_t  *oloc;
-    herr_t      ret_value = SUCCEED;
+    H5O_loc_t  *oloc;			/* Object location */
+    herr_t      ret_value = SUCCEED;	/* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", object_id);
@@ -506,7 +334,12 @@ H5Oincr_refcount(hid_t object_id)
     if((oloc = H5O_get_loc(object_id)) == NULL)
         HGOTO_ERROR(H5E_ATOM, H5E_BADVALUE, FAIL, "unable to get object location from ID")
 
-    if(H5O_link(oloc, 1, H5AC_ind_read_dxpl_id) < 0)
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(object_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    /* Change the object's refcount */
+    if(H5O__link(oloc, 1) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "modifying object link count failed")
 
 done:
@@ -537,8 +370,8 @@ done:
 herr_t
 H5Odecr_refcount(hid_t object_id)
 {
-    H5O_loc_t  *oloc;
-    herr_t      ret_value = SUCCEED;
+    H5O_loc_t  *oloc;			/* Object location */
+    herr_t      ret_value = SUCCEED;	/* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", object_id);
@@ -547,7 +380,12 @@ H5Odecr_refcount(hid_t object_id)
     if((oloc = H5O_get_loc(object_id)) == NULL)
         HGOTO_ERROR(H5E_ATOM, H5E_BADVALUE, FAIL, "unable to get object location from ID")
 
-    if(H5O_link(oloc, -1, H5AC_ind_read_dxpl_id) < 0)
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(object_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    /* Change the object's refcount */
+    if(H5O__link(oloc, -1) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "modifying object link count failed")
 
 done:
@@ -572,7 +410,6 @@ htri_t
 H5Oexists_by_name(hid_t loc_id, const char *name, hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Location info */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     htri_t      ret_value = FAIL;       /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -584,12 +421,12 @@ H5Oexists_by_name(hid_t loc_id, const char *name, hid_t lapl_id)
     if(!name || !*name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Check if the object exists */
-    if((ret_value = H5G_loc_exists(&loc, name, lapl_id, dxpl_id)) < 0)
+    if((ret_value = H5O__exists_by_name(&loc, name)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine if '%s' exists", name)
 
 done:
@@ -626,8 +463,8 @@ H5Oget_info(hid_t loc_id, H5O_info_t *oinfo)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
 
     /* Retrieve the object's information */
-    if(H5G_loc_info(&loc, ".", TRUE, oinfo/*out*/, H5P_LINK_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    if(H5O__get_info_by_name(&loc, ".", oinfo/*out*/) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get info for object")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -651,7 +488,6 @@ herr_t
 H5Oget_info_by_name(hid_t loc_id, const char *name, H5O_info_t *oinfo, hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Location of group */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -665,13 +501,13 @@ H5Oget_info_by_name(hid_t loc_id, const char *name, H5O_info_t *oinfo, hid_t lap
     if(!oinfo)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Retrieve the object's information */
-    if(H5G_loc_info(&loc, name, TRUE, oinfo/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    if(H5O__get_info_by_name(&loc, name, oinfo/*out*/) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get info for object: '%s'", name)
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -697,11 +533,6 @@ H5Oget_info_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     H5_iter_order_t order, hsize_t n, H5O_info_t *oinfo, hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Location of group */
-    H5G_loc_t   obj_loc;                /* Location used to open group */
-    H5G_name_t  obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -712,37 +543,23 @@ H5Oget_info_by_idx(hid_t loc_id, const char *group_name, H5_index_t idx_type,
     if(H5G_loc(loc_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
     if(!group_name || !*group_name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name specified")
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
     if(!oinfo)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no info struct")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location, according to the order in the index */
-    if(H5G_loc_find_by_idx(&loc, group_name, idx_type, order, n, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "group not found")
-    loc_found = TRUE;
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Retrieve the object's information */
-    if(H5O_get_info(obj_loc.oloc, dxpl_id, TRUE, oinfo) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object info")
+    if(H5O__get_info_by_idx(&loc, group_name, idx_type, order, n, oinfo) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get info for object")
 
 done:
-    /* Release the object location */
-    if(loc_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
-
     FUNC_LEAVE_API(ret_value)
 } /* end H5Oget_info_by_idx() */
 
@@ -777,9 +594,13 @@ H5Oset_comment(hid_t obj_id, const char *comment)
     if(H5G_loc(obj_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(obj_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
     /* (Re)set the object's comment */
-    if(H5G_loc_set_comment(&loc, ".", comment, H5P_LINK_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    if(H5O__set_comment_by_name(&loc, ".", comment) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set comment for object")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -808,7 +629,6 @@ H5Oset_comment_by_name(hid_t loc_id, const char *name, const char *comment,
     hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Location of group */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -820,13 +640,13 @@ H5Oset_comment_by_name(hid_t loc_id, const char *name, const char *comment,
     if(!name || !*name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* (Re)set the object's comment */
-    if(H5G_loc_set_comment(&loc, name, comment, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    if(H5O__set_comment_by_name(&loc, name, comment) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set comment for object: '%s'", name)
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -863,8 +683,8 @@ H5Oget_comment(hid_t obj_id, char *comment, size_t bufsize)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
     /* Retrieve the object's comment */
-    if((ret_value = H5G_loc_get_comment(&loc, ".", comment/*out*/, bufsize, H5P_LINK_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    if((ret_value = H5O__get_comment_by_name(&loc, ".", comment/*out*/, bufsize)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get comment for object")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -892,7 +712,6 @@ H5Oget_comment_by_name(hid_t loc_id, const char *name, char *comment, size_t buf
     hid_t lapl_id)
 {
     H5G_loc_t	loc;                    /* Location of group */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     ssize_t     ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -904,13 +723,13 @@ H5Oget_comment_by_name(hid_t loc_id, const char *name, char *comment, size_t buf
     if(!name || !*name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Retrieve the object's comment */
-    if((ret_value = H5G_loc_get_comment(&loc, name, comment/*out*/, bufsize, lapl_id, dxpl_id)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    if((ret_value = H5O__get_comment_by_name(&loc, name, comment/*out*/, bufsize)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get comment for object: '%s'", name)
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -960,15 +779,15 @@ H5Ovisit(hid_t obj_id, H5_index_t idx_type, H5_iter_order_t order,
 
     /* Check args */
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
     if(!op)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no callback operator specified")
 
     /* Call internal object visitation routine */
-    if((ret_value = H5O_visit(obj_id, ".", idx_type, order, op, op_data, H5P_LINK_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
+    if((ret_value = H5O__visit(obj_id, ".", idx_type, order, op, op_data)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1011,7 +830,6 @@ herr_t
 H5Ovisit_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id)
 {
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value;              /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1022,19 +840,19 @@ H5Ovisit_by_name(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
     if(!obj_name || !*obj_name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
     if(idx_type <= H5_INDEX_UNKNOWN || idx_type >= H5_INDEX_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index type specified")
     if(order <= H5_ITER_UNKNOWN || order >= H5_ITER_N)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid iteration order specified")
     if(!op)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no callback operator specified")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&lapl_id, H5P_CLS_LACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&lapl_id, H5P_CLS_LACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Call internal object visitation routine */
-    if((ret_value = H5O_visit(loc_id, obj_name, idx_type, order, op, op_data, lapl_id, dxpl_id)) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
+    if((ret_value = H5O__visit(loc_id, obj_name, idx_type, order, op, op_data)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1214,2514 +1032,3 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Oare_mdc_flushes_disabled() */
 
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_create
- *
- * Purpose:	Creates a new object header. Allocates space for it and
- *              then calls an initialization function. The object header
- *              is opened for write access and should eventually be
- *              closed by calling H5O_close().
- *
- * Return:	Success:	Non-negative, the ENT argument contains
- *				information about the object header,
- *				including its address.
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug  5 1997
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint, size_t initial_rc,
-    hid_t ocpl_id, H5O_loc_t *loc/*out*/)
-{
-    H5P_genplist_t  *oc_plist;          /* Object creation property list */
-    H5O_t      *oh = NULL;              /* Object header created */
-    haddr_t     oh_addr;                /* Address of initial object header */
-    size_t      oh_size;                /* Size of initial object header */
-    uint8_t	oh_flags;		/* Object header's initial status flags */
-    unsigned    insert_flags = H5AC__NO_FLAGS_SET; /* Flags for inserting object header into cache */
-    hbool_t     store_msg_crt_idx;      /* Whether to always store message creation indices for this file */
-    herr_t      ret_value = SUCCEED;    /* return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(f);
-    HDassert(loc);
-    HDassert(TRUE == H5P_isa_class(ocpl_id, H5P_OBJECT_CREATE));
-
-    /* Check for invalid access request */
-    if(0 == (H5F_INTENT(f) & H5F_ACC_RDWR))
-        HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "no write intent on file")
-
-    /* Make certain we allocate at least a reasonable size for the object header */
-    size_hint = H5O_ALIGN_F(f, MAX(H5O_MIN_SIZE, size_hint));
-
-    /* Get the property list */
-    if(NULL == (oc_plist = (H5P_genplist_t *)H5I_object(ocpl_id)))
-        HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a property list")
-
-    /* Get any object header status flags set by properties */
-    if(H5P_get(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &oh_flags) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get object header flags")
-
-    /* Allocate the object header and zero out header fields */
-    if(NULL == (oh = H5FL_CALLOC(H5O_t)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-    /* Initialize file-specific information for object header */
-    store_msg_crt_idx = H5F_STORE_MSG_CRT_IDX(f);
-    if(H5F_USE_LATEST_FLAGS(f, H5F_LATEST_OBJ_HEADER) || store_msg_crt_idx || (oh_flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED))
-        oh->version = H5O_VERSION_LATEST;
-    else
-        oh->version = H5O_VERSION_1;
-    oh->sizeof_size = H5F_SIZEOF_SIZE(f);
-    oh->sizeof_addr = H5F_SIZEOF_ADDR(f);
-    oh->swmr_write = !!(H5F_INTENT(f) & H5F_ACC_SWMR_WRITE);
-#ifdef H5O_ENABLE_BAD_MESG_COUNT
-    /* Check whether the "bad message count" property is set */
-    if(H5P_exist_plist(oc_plist, H5O_BAD_MESG_COUNT_NAME) > 0) {
-        /* Retrieve bad message count flag */
-        if(H5P_get(oc_plist, H5O_BAD_MESG_COUNT_NAME, &oh->store_bad_mesg_count) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get bad message count flag")
-    } /* end if */
-#endif /* H5O_ENABLE_BAD_MESG_COUNT */
-
-    /* Create object header proxy if doing SWMR writes */
-    if(oh->swmr_write) {
-        /* Create virtual entry, for use as proxy */
-        if(NULL == (oh->proxy = H5AC_proxy_entry_create()))
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create object header proxy")
-    } /* end if */
-    else
-        oh->proxy = NULL;
-
-    /* Set initial status flags */
-    oh->flags = oh_flags;
-
-    /* Initialize version-specific fields */
-    if(oh->version > H5O_VERSION_1) {
-        /* Initialize all time fields with current time, if we are storing them */
-        if(oh->flags & H5O_HDR_STORE_TIMES)
-            oh->atime = oh->mtime = oh->ctime = oh->btime = H5_now();
-        else
-            oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
-
-        /* Make certain attribute creation order tracking is enabled if
-         *      attributes can be shared in this file.
-         */
-        if(store_msg_crt_idx)
-            oh->flags |= H5O_HDR_ATTR_CRT_ORDER_TRACKED;
-
-        /* Retrieve attribute storage phase change values from property list */
-        if(H5P_get(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get max. # of compact attributes")
-        if(H5P_get(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get min. # of dense attributes")
-
-        /* Check for non-default attribute storage phase change values */
-        if(oh->max_compact != H5O_CRT_ATTR_MAX_COMPACT_DEF || oh->min_dense != H5O_CRT_ATTR_MIN_DENSE_DEF)
-            oh->flags |= H5O_HDR_ATTR_STORE_PHASE_CHANGE;
-
-        /* Determine correct value for chunk #0 size bits */
-/* Avoid compiler warning on 32-bit machines */
-#if H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T
-        if(size_hint > 4294967295UL)
-            oh->flags |= H5O_HDR_CHUNK0_8;
-        else
-#endif /* H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T */
-        if(size_hint > 65535)
-            oh->flags |= H5O_HDR_CHUNK0_4;
-        else if(size_hint > 255)
-            oh->flags |= H5O_HDR_CHUNK0_2;
-    } /* end if */
-    else {
-        /* Reset unused time fields */
-        oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
-    } /* end else */
-
-    /* Compute total size of initial object header */
-    /* (i.e. object header prefix and first chunk) */
-    oh_size = (size_t)H5O_SIZEOF_HDR(oh) + size_hint;
-
-    /* Allocate disk space for header and first chunk */
-    if(HADDR_UNDEF == (oh_addr = H5MF_alloc(f, H5FD_MEM_OHDR, dxpl_id, (hsize_t)oh_size)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for object header")
-
-    /* Create the chunk list */
-    oh->nchunks = oh->alloc_nchunks = 1;
-    if(NULL == (oh->chunk = H5FL_SEQ_MALLOC(H5O_chunk_t, (size_t)oh->alloc_nchunks)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-    /* Initialize the first chunk */
-    oh->chunk[0].addr = oh_addr;
-    oh->chunk[0].size = oh_size;
-    oh->chunk[0].gap = 0;
-
-    /* Allocate enough space for the first chunk */
-    /* (including space for serializing the object header prefix */
-    if(NULL == (oh->chunk[0].image = H5FL_BLK_CALLOC(chunk_image, oh_size)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-    oh->chunk[0].chunk_proxy = NULL;
-
-    /* Put magic # for object header in first chunk */
-    if(oh->version > H5O_VERSION_1)
-        HDmemcpy(oh->chunk[0].image, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
-
-    /* Create the message list */
-    oh->nmesgs = 1;
-    oh->alloc_nmesgs = H5O_NMESGS;
-    if(NULL == (oh->mesg = H5FL_SEQ_CALLOC(H5O_mesg_t, oh->alloc_nmesgs)))
-        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-    /* Initialize the initial "null" message, covering the entire first chunk */
-    oh->mesg[0].type = H5O_MSG_NULL;
-    oh->mesg[0].dirty = TRUE;
-    oh->mesg[0].native = NULL;
-    oh->mesg[0].raw = oh->chunk[0].image + (H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)) + H5O_SIZEOF_MSGHDR_OH(oh);
-    oh->mesg[0].raw_size = size_hint - (size_t)H5O_SIZEOF_MSGHDR_OH(oh);
-    oh->mesg[0].chunkno = 0;
-
-    /* Check for non-zero initial refcount on the object header */
-    if(initial_rc > 0) {
-        /* Set the initial refcount & pin the header when its inserted */
-        oh->rc = initial_rc;
-        insert_flags |= H5AC__PIN_ENTRY_FLAG;
-    } /* end if */
-
-    /* Set metadata tag in dxpl_id */
-    H5_BEGIN_TAG(dxpl_id, oh_addr, FAIL);
-
-    /* Cache object header */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_OHDR, oh_addr, oh, insert_flags) < 0)
-        HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header")
-
-    /* Reset object header pointer, now that it's been inserted into the cache */
-    oh = NULL;
-
-    /* Reset metadata tag in dxpl_id */
-    H5_END_TAG(FAIL);
-
-    /* Set up object location */
-    loc->file = f;
-    loc->addr = oh_addr;
-
-    /* Open it */
-    if(H5O_open(loc) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object header")
-
-done:
-    if(ret_value < 0 && oh)
-        if(H5O__free(oh) < 0)
-	    HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_create() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_open
- *
- * Purpose:	Opens an object header which is described by the symbol table
- *		entry OBJ_ENT.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		Monday, January	 5, 1998
- *
- * Modification:
- *              Raymond Lu
- *              5 November 2007
- *              Turn off the holding file variable if it's on.  When it's
- *              needed, the caller will turn it on again.
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_open(H5O_loc_t *loc)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(loc->file);
-
-#ifdef H5O_DEBUG
-    if(H5DEBUG(O))
-	HDfprintf(H5DEBUG(O), "> %a\n", loc->addr);
-#endif
-
-    /* Turn off the variable for holding file or increment open-lock counters */
-    if(loc->holding_file)
-     	loc->holding_file = FALSE;
-    else
-        H5F_INCR_NOPEN_OBJS(loc->file);
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_open() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_open_name
- *
- * Purpose:	Opens an object within an HDF5 file.
- *
- * Return:	Success:	An open object identifier
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		March  5 2007
- *
- *-------------------------------------------------------------------------
- */
-hid_t
-H5O_open_name(H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref)
-{
-    H5G_loc_t   obj_loc;                /* Location used to open group */
-    H5G_name_t  obj_path;            	/* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
-    hid_t       ret_value = FAIL;
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(name && *name);
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location */
-    if(H5G_loc_find(loc, name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
-
-    /* Open the object */
-    if((ret_value = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, app_ref)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
-
-done:
-    if(ret_value < 0 && loc_found)
-        if(H5G_loc_free(&obj_loc) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_open_name() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_open_by_loc
- *
- * Purpose:	Opens an object and returns an ID given its group loction.
- *
- * Return:	Success:	Open object identifier
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *		July 25 2006
- *
- *-------------------------------------------------------------------------
- */
-hid_t
-H5O_open_by_loc(const H5G_loc_t *obj_loc, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref)
-{
-    const H5O_obj_class_t *obj_class;   /* Class of object for location */
-    hid_t               ret_value = H5I_INVALID_HID;    /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    HDassert(obj_loc);
-
-    /* Get the object class for this location */
-    if(NULL == (obj_class = H5O_obj_class(obj_loc->oloc, dxpl_id)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object class")
-
-    /* Call the object class's 'open' routine */
-    HDassert(obj_class->open);
-    if((ret_value = obj_class->open(obj_loc, lapl_id, dxpl_id, app_ref)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_open_by_loc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_close
- *
- * Purpose:	Closes an object header that was previously open.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		Monday, January	 5, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_close(H5O_loc_t *loc, hbool_t *file_closed /*out*/)
-{
-    herr_t ret_value = SUCCEED;   /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(loc->file);
-    HDassert(H5F_NOPEN_OBJS(loc->file) > 0);
-
-    /* Set the file_closed flag to the default value.
-     * This flag lets downstream code know if the file struct is
-     * still accessible and/or likely to contain useful data.
-     * It's needed by the evict-on-close code. Clients can ignore
-     * this value by passing in NULL.
-     */
-    if(file_closed)
-        *file_closed = FALSE;
-
-    /* Decrement open-lock counters */
-    H5F_DECR_NOPEN_OBJS(loc->file);
-
-#ifdef H5O_DEBUG
-    if(H5DEBUG(O)) {
-	if(H5F_FILE_ID(loc->file)< 0 && 1 == H5F_NREFS(loc->file))
-	    HDfprintf(H5DEBUG(O), "< %a auto %lu remaining\n",
-		      loc->addr,
-		      (unsigned long)H5F_NOPEN_OBJS(loc->file));
-	else
-	    HDfprintf(H5DEBUG(O), "< %a\n", loc->addr);
-    } /* end if */
-#endif
-
-    /*
-     * If the file open object count has reached the number of open mount points
-     * (each of which has a group open in the file) attempt to close the file.
-     */
-    if(H5F_NOPEN_OBJS(loc->file) == H5F_NMOUNTS(loc->file))
-        /* Attempt to close down the file hierarchy */
-        if(H5F_try_close(loc->file, file_closed) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCLOSEFILE, FAIL, "problem attempting file close")
-
-    /* Release location information */
-    if(H5O_loc_free(loc) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "problem attempting to free location")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_close() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_link_oh
- *
- * Purpose:	Adjust the link count for an open object header by adding
- *		ADJUST to the link count.
- *
- * Return:	Success:	New link count
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug  5 1997
- *
- *-------------------------------------------------------------------------
- */
-int
-H5O_link_oh(H5F_t *f, int adjust, hid_t dxpl_id, H5O_t *oh, hbool_t *deleted)
-{
-    haddr_t addr = H5O_OH_GET_ADDR(oh);     /* Object header address */
-    int	ret_value = -1;                     /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(f);
-    HDassert(oh);
-    HDassert(deleted);
-
-    /* Check for adjusting link count */
-    if(adjust) {
-        if(adjust < 0) {
-            /* Check for too large of an adjustment */
-            if((unsigned)(-adjust) > oh->nlink)
-                HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "link count would be negative")
-
-            /* Adjust the link count for the object header */
-            oh->nlink = (unsigned)((int)oh->nlink + adjust);
-
-            /* Mark object header as dirty in cache */
-            if(H5AC_mark_entry_dirty(oh) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
-
-            /* Check if the object should be deleted */
-            if(oh->nlink == 0) {
-                /* Check if the object is still open by the user */
-                if(H5FO_opened(f, addr) != NULL) {
-                    /* Flag the object to be deleted when it's closed */
-                    if(H5FO_mark(f, addr, TRUE) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
-                } /* end if */
-                else {
-                    /* Mark the object header for deletion */
-                    *deleted = TRUE;
-                } /* end else */
-            } /* end if */
-        } /* end if */
-        else {
-            /* A new object, or one that will be deleted */
-            if(0 == oh->nlink) {
-                /* Check if the object is currently open, but marked for deletion */
-                if(H5FO_marked(f, addr)) {
-                    /* Remove "delete me" flag on the object */
-                    if(H5FO_mark(f, addr, FALSE) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
-                } /* end if */
-            } /* end if */
-
-            /* Adjust the link count for the object header */
-            oh->nlink = (unsigned)((int)oh->nlink + adjust);
-
-            /* Mark object header as dirty in cache */
-            if(H5AC_mark_entry_dirty(oh) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
-        } /* end if */
-
-        /* Check for operations on refcount message */
-        if(oh->version > H5O_VERSION_1) {
-            /* Check if the object has a refcount message already */
-            if(oh->has_refcount_msg) {
-                /* Check for removing refcount message */
-                if(oh->nlink <= 1) {
-                    if(H5O_msg_remove_real(f, oh, H5O_MSG_REFCOUNT, H5O_ALL, NULL, NULL, TRUE, dxpl_id) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete refcount message")
-                    oh->has_refcount_msg = FALSE;
-                } /* end if */
-                /* Update refcount message with new link count */
-                else {
-                    H5O_refcount_t refcount = oh->nlink;
-
-                    if(H5O_msg_write_real(f, dxpl_id, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTUPDATE, FAIL, "unable to update refcount message")
-                } /* end else */
-            } /* end if */
-            else {
-                /* Check for adding refcount message to object */
-                if(oh->nlink > 1) {
-                    H5O_refcount_t refcount = oh->nlink;
-
-                    if(H5O_msg_append_real(f, dxpl_id, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to create new refcount message")
-                    oh->has_refcount_msg = TRUE;
-                } /* end if */
-            } /* end else */
-        } /* end if */
-    } /* end if */
-
-    /* Set return value */
-    ret_value = (int)oh->nlink;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_link_oh() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_link
- *
- * Purpose:	Adjust the link count for an object header by adding
- *		ADJUST to the link count.
- *
- * Return:	Success:	New link count
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Aug  5 1997
- *
- *-------------------------------------------------------------------------
- */
-int
-H5O_link(const H5O_loc_t *loc, int adjust, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;
-    hbool_t deleted = FALSE;            /* Whether the object was deleted */
-    int	ret_value = -1;                 /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
-
-    /* check args */
-    HDassert(loc);
-    HDassert(loc->file);
-    HDassert(H5F_addr_defined(loc->addr));
-
-    /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
-
-    /* Call the "real" link routine */
-    if((ret_value = H5O_link_oh(loc->file, adjust, dxpl_id, oh, &deleted)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust object link count")
-
-done:
-    if(oh && H5O_unpin(oh) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
-    if(ret_value >= 0 && deleted && H5O_delete(loc->file, dxpl_id, loc->addr) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_link() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_protect
- *
- * Purpose:	Wrapper around H5AC_protect for use during a H5O_protect->
- *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
- *              during an object's creation.
- *
- * Return:	Success:	Pointer to the object header structure for the
- *                              object.
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Dec 31 2002
- *
- *-------------------------------------------------------------------------
- */
-H5O_t *
-H5O_protect(const H5O_loc_t *loc, hid_t dxpl_id, unsigned prot_flags,
-    hbool_t pin_all_chunks)
-{
-    H5O_t *oh = NULL;           /* Object header protected */
-    H5O_cache_ud_t udata;       /* User data for protecting object header */
-    H5O_cont_msgs_t cont_msg_info;      /* Continuation message info */
-    unsigned file_intent;       /* R/W intent on file */
-    H5O_t *ret_value = NULL;    /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, NULL)
-
-    /* check args */
-    HDassert(loc);
-    HDassert(loc->file);
-
-    /* prot_flags may only contain the H5AC__READ_ONLY_FLAG */
-    HDassert((prot_flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
-
-    /* Check for valid address */
-    if(!H5F_addr_defined(loc->addr))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "address undefined")
-
-    /* Check for write access on the file */
-    file_intent = H5F_INTENT(loc->file);
-    if((0 == (prot_flags & H5AC__READ_ONLY_FLAG)) && (0 == (file_intent & H5F_ACC_RDWR)))
-	HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "no write intent on file")
-
-    /* Construct the user data for protect callback */
-    udata.made_attempt = FALSE;
-    udata.v1_pfx_nmesgs = 0;
-    udata.chunk0_size = 0;
-    udata.oh = NULL;
-    udata.common.f = loc->file;
-    udata.common.dxpl_id = dxpl_id;
-    udata.common.file_intent = file_intent;
-    udata.common.merged_null_msgs = 0;
-    HDmemset(&cont_msg_info, 0, sizeof(cont_msg_info));
-    udata.common.cont_msg_info = &cont_msg_info;
-    udata.common.addr = loc->addr;
-
-    /* Lock the object header into the cache */
-    if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR, loc->addr, &udata, prot_flags)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
-
-    /* Check if there are any continuation messages to process */
-    if(cont_msg_info.nmsgs > 0) {
-        size_t curr_msg;        /* Current continuation message to process */
-        H5O_chk_cache_ud_t chk_udata;   /* User data for loading chunk */
-
-        /* Sanity check - we should only have continuation messages to process
-         *      when the object header is actually loaded from the file.
-         */
-        HDassert(udata.made_attempt == TRUE);
-        HDassert(cont_msg_info.msgs);
-
-        /* Construct the user data for protecting chunks */
-        chk_udata.decoding = TRUE;
-        chk_udata.oh = oh;
-        chk_udata.chunkno = UINT_MAX;   /* Set to invalid value, for better error detection */
-        chk_udata.common.f = loc->file;
-        chk_udata.common.dxpl_id = dxpl_id;
-        chk_udata.common.file_intent = file_intent;
-        chk_udata.common.merged_null_msgs = udata.common.merged_null_msgs;
-        chk_udata.common.cont_msg_info = &cont_msg_info;
-
-        /* Read in continuation messages, until there are no more */
-        /* (Note that loading chunks could increase the # of continuation
-         *      messages if new ones are found - QAK, 19/11/2016)
-         */
-        curr_msg = 0;
-        while(curr_msg < cont_msg_info.nmsgs) {
-            H5O_chunk_proxy_t *chk_proxy;       /* Proxy for chunk, to bring it into memory */
-#ifndef NDEBUG
-            size_t chkcnt = oh->nchunks;      /* Count of chunks (for sanity checking) */
-#endif /* NDEBUG */
-
-            /* Bring the chunk into the cache */
-            /* (which adds to the object header) */
-            chk_udata.common.addr = cont_msg_info.msgs[curr_msg].addr;
-            chk_udata.size = cont_msg_info.msgs[curr_msg].size;
-            if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(loc->file, dxpl_id, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, &chk_udata, prot_flags)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header chunk")
-
-            /* Sanity check */
-            HDassert(chk_proxy->oh == oh);
-            HDassert(chk_proxy->chunkno == chkcnt);
-            HDassert(oh->nchunks == (chkcnt + 1));
-
-            /* Release the chunk from the cache */
-            if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, chk_proxy, H5AC__NO_FLAGS_SET) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header chunk")
-
-            /* Advance to next continuation message */
-            curr_msg++;
-        } /* end while */
-
-        /* Release any continuation messages built up */
-        cont_msg_info.msgs = (H5O_cont_t *)H5FL_SEQ_FREE(H5O_cont_t, cont_msg_info.msgs);
-
-        /* Pass back out some of the chunk's user data */
-        udata.common.merged_null_msgs = chk_udata.common.merged_null_msgs;
-    } /* end if */
-
-    /* Check for incorrect # of object header messages, if we've just loaded
-     *  this object header from the file
-     */
-    if(udata.made_attempt) {
-/* Don't enforce the error on an incorrect # of object header messages bug
- *      unless strict format checking is enabled.  This allows for older
- *      files, created with a version of the library that had a bug in tracking
- *      the correct # of header messages to be read in without the library
- *      erroring out here. -QAK
- */
-#ifdef H5_STRICT_FORMAT_CHECKS
-        /* Check for incorrect # of messages in v1 object header */
-        if(oh->version == H5O_VERSION_1 &&
-                (oh->nmesgs + udata.common.merged_null_msgs) != udata.v1_pfx_nmesgs)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "corrupt object header - incorrect # of messages")
-#endif /* H5_STRICT_FORMAT_CHECKS */
-    } /* end if */
-
-#ifdef H5O_DEBUG
-H5O_assert(oh);
-#endif /* H5O_DEBUG */
-
-    /* Pin the other chunks also when requested, so that the object header
-     *  proxy can be set up.
-     */
-    if(pin_all_chunks && oh->nchunks > 1) {
-        unsigned u;         /* Local index variable */
-
-        /* Sanity check */
-        HDassert(oh->swmr_write);
-
-        /* Iterate over chunks > 0 */
-        for(u = 1; u < oh->nchunks; u++) {
-            H5O_chunk_proxy_t *chk_proxy;       /* Chunk proxy */
-
-            /* Protect chunk */
-            if(NULL == (chk_proxy = H5O_chunk_protect(loc->file, dxpl_id, oh, u)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header chunk")
-
-            /* Pin chunk proxy*/
-            if(H5AC_pin_protected_entry(chk_proxy) < 0 )
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, NULL, "unable to pin object header chunk")
-
-            /* Unprotect chunk */
-            if(H5O_chunk_unprotect(loc->file, dxpl_id, chk_proxy, FALSE) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to unprotect object header chunk")
-
-            /* Preserve chunk proxy pointer for later */
-            oh->chunk[u].chunk_proxy = chk_proxy;
-        } /* end for */
-
-        /* Set the flag for the unprotect */
-        oh->chunks_pinned = TRUE;
-    } /* end if */
-
-    /* Set return value */
-    ret_value = oh;
-
-done:
-    if(ret_value == NULL && oh)
-        if(H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* end H5O_protect() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_pin
- *
- * Purpose:	Pin an object header down for use during a sequence of message
- *              operations, which prevents the object header from being
- *              evicted from the cache.
- *
- * Return:	Success:	Pointer to the object header structure for the
- *                              object.
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-H5O_t *
-H5O_pin(const H5O_loc_t *loc, hid_t dxpl_id)
-{
-    H5O_t       *oh = NULL;             /* Object header */
-    H5O_t       *ret_value = NULL;      /* Return value */
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    /* check args */
-    HDassert(loc);
-
-    /* Get header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header")
-
-    /* Increment the reference count on the object header */
-    /* (which will pin it, if appropriate) */
-    if(H5O_inc_rc(oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "unable to increment reference count on object header")
-
-    /* Set the return value */
-    ret_value = oh;
-
-done:
-    /* Release the object header from the cache */
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_pin() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_unpin
- *
- * Purpose:	Unpin an object header, allowing it to be evicted from the
- *              metadata cache.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_unpin(H5O_t *oh)
-{
-    herr_t ret_value = SUCCEED;      /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(oh);
-
-    /* Decrement the reference count on the object header */
-    /* (which will unpin it, if appropriate) */
-    if(H5O_dec_rc(oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_unpin() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_unprotect
- *
- * Purpose:	Wrapper around H5AC_unprotect for use during a H5O_protect->
- *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
- *              during an object's creation.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Dec 31 2002
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_unprotect(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, unsigned oh_flags)
-{
-    herr_t ret_value = SUCCEED;      /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(loc);
-    HDassert(oh);
-
-    /* Unpin the other chunks */
-    if(oh->chunks_pinned && oh->nchunks > 1) {
-        unsigned u;         /* Local index variable */
-
-        /* Sanity check */
-        HDassert(oh->swmr_write);
-
-        /* Iterate over chunks > 0 */
-        for(u = 1; u < oh->nchunks; u++) {
-            if(NULL != oh->chunk[u].chunk_proxy) {
-                /* Release chunk proxy */
-                if(H5AC_unpin_entry(oh->chunk[u].chunk_proxy) < 0)
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header chunk")
-                oh->chunk[u].chunk_proxy = NULL;
-            } /* end if */
-        } /* end for */
-
-        /* Reet the flag from the unprotect */
-        oh->chunks_pinned = FALSE;
-    } /* end if */
-
-    /* Unprotect the object header */
-    if(H5AC_unprotect(loc->file, dxpl_id, H5AC_OHDR, oh->chunk[0].addr, oh, oh_flags) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_unprotect() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_touch_oh
- *
- * Purpose:	If FORCE is non-zero then create a modification time message
- *		unless one already exists.  Then update any existing
- *		modification time message with the current time.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Monday, July 27, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_touch_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, hbool_t force)
-{
-    H5O_chunk_proxy_t *chk_proxy = NULL;        /* Chunk that message is in */
-    hbool_t chk_dirtied = FALSE;        /* Flag for unprotecting chunk */
-    time_t	now;                    /* Current time */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(f);
-    HDassert(oh);
-
-    /* Check if this object header is tracking times */
-    if(oh->flags & H5O_HDR_STORE_TIMES) {
-        /* Get current time */
-        now = H5_now();
-
-        /* Check version, to determine how to store time information */
-        if(oh->version == H5O_VERSION_1) {
-            size_t	idx;                    /* Index of modification time message to update */
-
-            /* Look for existing message */
-            for(idx = 0; idx < oh->nmesgs; idx++)
-                if(H5O_MSG_MTIME == oh->mesg[idx].type || H5O_MSG_MTIME_NEW == oh->mesg[idx].type)
-                    break;
-
-            /* Create a new message, if necessary */
-            if(idx == oh->nmesgs) {
-                unsigned mesg_flags = 0;        /* Flags for message in object header */
-
-                /* If we would have to create a new message, but we aren't 'forcing' it, get out now */
-                if(!force)
-                    HGOTO_DONE(SUCCEED);        /*nothing to do*/
-
-                /* Allocate space for the modification time message */
-                if(H5O_msg_alloc(f, dxpl_id, oh, H5O_MSG_MTIME_NEW, &mesg_flags, &now, &idx) < 0)
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for modification time message")
-
-                /* Set the message's flags if appropriate */
-                oh->mesg[idx].flags = (uint8_t)mesg_flags;
-            } /* end if */
-
-            /* Protect chunk */
-            if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, oh->mesg[idx].chunkno)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
-
-            /* Allocate 'native' space, if necessary */
-            if(NULL == oh->mesg[idx].native) {
-                if(NULL == (oh->mesg[idx].native = H5FL_MALLOC(time_t)))
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for modification time message")
-            } /* end if */
-
-            /* Update the message */
-            *((time_t *)(oh->mesg[idx].native)) = now;
-
-            /* Mark the message as dirty */
-            oh->mesg[idx].dirty = TRUE;
-            chk_dirtied = TRUE;
-        } /* end if */
-        else {
-            /* XXX: For now, update access time & change fields in the object header */
-            /* (will need to add some code to update modification time appropriately) */
-            oh->atime = oh->ctime = now;
-
-            /* Mark object header as dirty in cache */
-            if(H5AC_mark_entry_dirty(oh) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
-        } /* end else */
-    } /* end if */
-
-done:
-    /* Release chunk */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_touch_oh() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_touch
- *
- * Purpose:	Touch an object by setting the modification time to the
- *		current time and marking the object as dirty.  Unless FORCE
- *		is non-zero, nothing happens if there is no MTIME message in
- *		the object header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Monday, July 27, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_touch(const H5O_loc_t *loc, hbool_t force, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;             /* Object header to modify */
-    unsigned 	oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(loc);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Create/Update the modification time message */
-    if(H5O_touch_oh(loc->file, dxpl_id, oh, force) < 0)
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "unable to update object modificaton time")
-
-    /* Mark object header as changed */
-    oh_flags |= H5AC__DIRTIED_FLAG;
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, oh_flags) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_touch() */
-
-#ifdef H5O_ENABLE_BOGUS
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_bogus_oh
- *
- * Purpose:	Create a "bogus" message unless one already exists.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              <koziol@ncsa.uiuc.edu>
- *              Tuesday, January 21, 2003
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_bogus_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned bogus_id, unsigned mesg_flags)
-{
-    size_t	idx;                /* Local index variable */
-    H5O_msg_class_t *type;	    /* Message class type */
-    herr_t ret_value = SUCCEED;     /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    HDassert(f);
-    HDassert(oh);
-
-    /* Look for existing message */
-    for(idx = 0; idx < oh->nmesgs; idx++)
-	if(H5O_MSG_BOGUS_VALID == oh->mesg[idx].type || 
-	   H5O_MSG_BOGUS_INVALID == oh->mesg[idx].type)
-            break;
-
-    /* Create a new message */
-    if(idx == oh->nmesgs) {
-        H5O_bogus_t *bogus;             /* Pointer to the bogus information */
-
-        /* Allocate the native message in memory */
-	if(NULL == (bogus = H5MM_malloc(sizeof(H5O_bogus_t))))
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for 'bogus' message")
-
-        /* Update the native value */
-        bogus->u = H5O_BOGUS_VALUE;
-
-	if(bogus_id == H5O_BOGUS_VALID_ID)
-	    type = H5O_MSG_BOGUS_VALID;
-	else if(bogus_id == H5O_BOGUS_INVALID_ID)
-	    type = H5O_MSG_BOGUS_INVALID;
-	else
-	    HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID for 'bogus' message")
-
-        /* Allocate space in the object header for bogus message */
-	if(H5O_msg_alloc(f, dxpl_id, oh, type, &mesg_flags, bogus, &idx) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for 'bogus' message")
-
-        /* Point to "bogus" information (take it over) */
-	oh->mesg[idx].native = bogus;
-
-        /* Set the appropriate flags for the message */
-        oh->mesg[idx].flags = mesg_flags;
-
-        /* Mark the message and object header as dirty */
-        oh->mesg[idx].dirty = TRUE;
-        oh->cache_info.is_dirty = TRUE;
-    } /* end if */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_bogus_oh() */
-#endif /* H5O_ENABLE_BOGUS */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_delete
- *
- * Purpose:	Delete an object header from a file.  This frees the file
- *              space used for the object header (and it's continuation blocks)
- *              and also walks through each header message and asks it to
- *              remove all the pieces of the file referenced by the header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Mar 19 2003
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr)
-{
-    H5O_t *oh = NULL;           /* Object header information */
-    H5O_loc_t loc;              /* Object location for object to delete */
-    unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
-    hbool_t corked;
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, addr, FAIL)
-
-    /* Check args */
-    HDassert(f);
-    HDassert(H5F_addr_defined(addr));
-
-    /* Set up the object location */
-    loc.file = f;
-    loc.addr = addr;
-    loc.holding_file = FALSE;
-
-    /* Get the object header information */
-    if(NULL == (oh = H5O_protect(&loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Delete object */
-    if(H5O_delete_oh(f, dxpl_id, oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
-
-    /* Uncork cache entries with tag: addr */
-    if(H5AC_cork(f, addr, H5AC__GET_CORKED, &corked) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to retrieve an object's cork status")
-    if(corked)
-	if(H5AC_cork(f, addr, H5AC__UNCORK, NULL) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNCORK, FAIL, "unable to uncork an object")
-
-    /* Mark object header as deleted */
-    oh_flags = H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG;
-
-done:
-    if(oh && H5O_unprotect(&loc, dxpl_id, oh, oh_flags) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_delete() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_delete_oh
- *
- * Purpose:	Internal function to:
- *              Delete an object header from a file.  This frees the file
- *              space used for the object header (and it's continuation blocks)
- *              and also walks through each header message and asks it to
- *              remove all the pieces of the file referenced by the header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Mar 19 2003
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_delete_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
-{
-    H5O_mesg_t *curr_msg;       /* Pointer to current message being operated on */
-    unsigned	u;
-    herr_t ret_value = SUCCEED;   /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check args */
-    HDassert(f);
-    HDassert(oh);
-
-    /* Walk through the list of object header messages, asking each one to
-     * delete any file space used
-     */
-    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
-        /* Free any space referred to in the file from this message */
-        if(H5O_delete_mesg(f, dxpl_id, oh, curr_msg) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
-    } /* end for */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_delete_oh() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_type
- *
- * Purpose:	Retrieves the type of object pointed to by `loc'.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *              Wednesday, November  4, 1998
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_obj_type(const H5O_loc_t *loc, H5O_type_t *obj_type, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;             /* Object header for location */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
-
-    /* Load the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Retrieve the type of the object */
-    if(H5O_obj_type_real(oh, obj_type) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_obj_type() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_type_real
- *
- * Purpose:	Returns the type of object pointed to by `oh'.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              Monday, November 21, 2005
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_obj_type_real(H5O_t *oh, H5O_type_t *obj_type)
-{
-    const H5O_obj_class_t *obj_class;           /* Class of object for header */
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Sanity check */
-    HDassert(oh);
-    HDassert(obj_type);
-
-    /* Look up class for object header */
-    if(NULL == (obj_class = H5O_obj_class_real(oh))) {
-        /* Clear error stack from "failed" class lookup */
-        H5E_clear_stack(NULL);
-
-        /* Set type to "unknown" */
-        *obj_type = H5O_TYPE_UNKNOWN;
-    } /* end if */
-    else {
-        /* Set object type */
-        *obj_type = obj_class->type;
-    } /* end else */
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_obj_type_real() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_class
- *
- * Purpose:	Returns the class of object pointed to by `loc'.
- *
- * Return:	Success:	An object class
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Monday, November  6, 2006
- *
- *-------------------------------------------------------------------------
- */
-const H5O_obj_class_t *
-H5O_obj_class(const H5O_loc_t *loc, hid_t dxpl_id)
-{
-    H5O_t	*oh = NULL;                     /* Object header for location */
-    const H5O_obj_class_t *ret_value = NULL;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, NULL)
-
-    /* Load the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
-
-    /* Test whether entry qualifies as a particular type of object */
-    if(NULL == (ret_value = H5O_obj_class_real(oh)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to determine object type")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* end H5O_obj_class() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_class_real
- *
- * Purpose:	Returns the class of object pointed to by `oh'.
- *
- * Return:	Success:	An object class
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Monday, November 21, 2005
- *
- *-------------------------------------------------------------------------
- */
-static const H5O_obj_class_t *
-H5O_obj_class_real(H5O_t *oh)
-{
-    size_t	i;                      /* Local index variable */
-    const H5O_obj_class_t *ret_value = NULL;   /* Return value */
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    /* Sanity check */
-    HDassert(oh);
-
-    /* Test whether entry qualifies as a particular type of object */
-    /* (Note: loop is in reverse order, to test specific objects first) */
-    for(i = NELMTS(H5O_obj_class_g); i > 0; --i) {
-        htri_t	isa;            /* Is entry a particular type? */
-
-	if((isa = (H5O_obj_class_g[i - 1]->isa)(oh)) < 0)
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
-	else if(isa)
-	    HGOTO_DONE(H5O_obj_class_g[i - 1])
-    } /* end for */
-
-    if(0 == i)
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_obj_class_real() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_loc
- *
- * Purpose:	Gets the object location for an object given its ID.
- *
- * Return:	Success:	Pointer to H5O_loc_t
- *		Failure:	NULL
- *
- * Programmer:	James Laird
- *		July 25 2006
- *
- *-------------------------------------------------------------------------
- */
-H5O_loc_t *
-H5O_get_loc(hid_t object_id)
-{
-    H5O_loc_t   *ret_value = NULL;      /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    switch(H5I_get_type(object_id)) {
-        case H5I_GROUP:
-            if(NULL == (ret_value = H5O_OBJ_GROUP->get_oloc(object_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from group ID")
-            break;
-
-        case H5I_DATASET:
-            if(NULL == (ret_value = H5O_OBJ_DATASET->get_oloc(object_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from dataset ID")
-            break;
-
-        case H5I_DATATYPE:
-            if(NULL == (ret_value = H5O_OBJ_DATATYPE->get_oloc(object_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from datatype ID")
-            break;
-
-        case H5I_UNINIT:
-        case H5I_BADID:
-        case H5I_FILE:
-        case H5I_DATASPACE:
-        case H5I_ATTR:
-        case H5I_REFERENCE:
-        case H5I_VFL:
-        case H5I_GENPROP_CLS:
-        case H5I_GENPROP_LST:
-        case H5I_ERROR_CLASS:
-        case H5I_ERROR_MSG:
-        case H5I_ERROR_STACK:
-        case H5I_NTYPES:
-        default:
-            HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, NULL, "invalid object type")
-    } /* end switch */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_loc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_loc_reset
- *
- * Purpose:	Reset a object location to an empty state
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              Monday, September 19, 2005
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_reset(H5O_loc_t *loc)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check arguments */
-    HDassert(loc);
-
-    /* Clear the object location to an empty state */
-    HDmemset(loc, 0, sizeof(H5O_loc_t));
-    loc->addr = HADDR_UNDEF;
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_loc_reset() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5O_loc_copy
- *
- * Purpose:     Copy object location information
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              koziol@ncsa.uiuc.edu
- *              Monday, September 19, 2005
- *
- * Notes:       'depth' parameter determines how much of the group entry
- *              structure we want to copy.  The values are:
- *                  H5_COPY_SHALLOW - Copy all the field values from the source
- *                      to the destination, but not copying objects pointed to.
- *                      (Destination "takes ownership" of objects pointed to)
- *                  H5_COPY_DEEP - Copy all the fields from the source to
- *                      the destination, deep copying objects pointed to.
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_copy(H5O_loc_t *dst, H5O_loc_t *src, H5_copy_depth_t depth)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check arguments */
-    HDassert(src);
-    HDassert(dst);
-    HDassert(depth == H5_COPY_SHALLOW || depth == H5_COPY_DEEP);
-
-    /* Copy the top level information */
-    HDmemcpy(dst, src, sizeof(H5O_loc_t));
-
-    /* Deep copy the names */
-    if(depth == H5_COPY_DEEP) {
-        /* If the original entry was holding open the file, this one should
-         * hold it open, too.
-         */
-        if(src->holding_file)
-            H5F_INCR_NOPEN_OBJS(dst->file);
-    } else if(depth == H5_COPY_SHALLOW) {
-        H5O_loc_reset(src);
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_loc_copy() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_loc_hold_file
- *
- * Purpose:	Have this object header hold a file open until it is
- *              released.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *              Wednesday, August 16, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_hold_file(H5O_loc_t *loc)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check arguments */
-    HDassert(loc);
-    HDassert(loc->file);
-
-    /* If this location is not already holding its file open, do so. */
-    if(!loc->holding_file) {
-        H5F_INCR_NOPEN_OBJS(loc->file);
-        loc->holding_file = TRUE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_loc_hold_file() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_loc_free
- *
- * Purpose:	Release resources used by this object header location.
- *              Not to be confused with H5O_close; this is used on
- *              locations that don't correspond to open objects.
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	James Laird
- *              Wednesday, August 16, 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_loc_free(H5O_loc_t *loc)
-{
-    herr_t ret_value = SUCCEED;
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check arguments */
-    HDassert(loc);
-
-    /* If this location is holding its file open try to close the file. */
-    if(loc->holding_file) {
-        H5F_DECR_NOPEN_OBJS(loc->file);
-        loc->holding_file = FALSE;
-        if(H5F_NOPEN_OBJS(loc->file) <= 0) {
-            if(H5F_try_close(loc->file, NULL) < 0)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file")
-        } /* end if */
-    } /* end if */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_loc_free() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_hdr_info
- *
- * Purpose:	Retrieve the object header information for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		September 22 2009
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_hdr_info(const H5O_loc_t *loc, hid_t dxpl_id, H5O_hdr_info_t *hdr)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(hdr);
-
-    /* Reset the object header info structure */
-    HDmemset(hdr, 0, sizeof(*hdr));
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")
-
-    /* Get the information for the object header */
-    if(H5O_get_hdr_info_real(oh, hdr) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_hdr_info() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_hdr_info_real
- *
- * Purpose:	Internal routine to retrieve the object header information for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		September 22 2009
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr)
-{
-    const H5O_mesg_t *curr_msg;         /* Pointer to current message being operated on */
-    const H5O_chunk_t *curr_chunk;	/* Pointer to current message being operated on */
-    unsigned u;                         /* Local index variable */
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check args */
-    HDassert(oh);
-    HDassert(hdr);
-
-    /* Set the version for the object header */
-    hdr->version = oh->version;
-
-    /* Set the number of messages & chunks */
-    H5_CHECKED_ASSIGN(hdr->nmesgs, unsigned, oh->nmesgs, size_t);
-    H5_CHECKED_ASSIGN(hdr->nchunks, unsigned, oh->nchunks, size_t);
-
-    /* Set the status flags */
-    hdr->flags = oh->flags;
-
-    /* Iterate over all the messages, accumulating message size & type information */
-    hdr->space.meta = (hsize_t)H5O_SIZEOF_HDR(oh) + (hsize_t)(H5O_SIZEOF_CHKHDR_OH(oh) * (oh->nchunks - 1));
-    hdr->space.mesg = 0;
-    hdr->space.free = 0;
-    hdr->mesg.present = 0;
-    hdr->mesg.shared = 0;
-    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
-        uint64_t type_flag;             /* Flag for message type */
-
-        /* Accumulate space usage information, based on the type of message */
-	if(H5O_NULL_ID == curr_msg->type->id)
-            hdr->space.free += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
-        else if(H5O_CONT_ID == curr_msg->type->id)
-            hdr->space.meta += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
-        else {
-            hdr->space.meta += (hsize_t)H5O_SIZEOF_MSGHDR_OH(oh);
-            hdr->space.mesg += curr_msg->raw_size;
-        } /* end else */
-
-        /* Set flag to indicate presence of message type */
-        type_flag = ((uint64_t)1) << curr_msg->type->id;
-        hdr->mesg.present |= type_flag;
-
-        /* Set flag if the message is shared in some way */
-        if(curr_msg->flags & H5O_MSG_FLAG_SHARED)                                   \
-            hdr->mesg.shared |= type_flag;
-    } /* end for */
-
-    /* Iterate over all the chunks, adding any gaps to the free space */
-    hdr->space.total = 0;
-    for(u = 0, curr_chunk = &oh->chunk[0]; u < oh->nchunks; u++, curr_chunk++) {
-        /* Accumulate the size of the header on disk */
-        hdr->space.total += curr_chunk->size;
-
-        /* If the chunk has a gap, add it to the free space */
-        hdr->space.free += curr_chunk->gap;
-    } /* end for */
-
-    /* Sanity check that all the bytes are accounted for */
-    HDassert(hdr->space.total == (hdr->space.free + hdr->space.meta + hdr->space.mesg));
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_get_hdr_info_real() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_info
- *
- * Purpose:	Retrieve the information for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		November 21 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_info(const H5O_loc_t *loc, hid_t dxpl_id, hbool_t want_ih_info,
-    H5O_info_t *oinfo)
-{
-    const H5O_obj_class_t *obj_class;   /* Class of object for header */
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(oinfo);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Reset the object info structure */
-    HDmemset(oinfo, 0, sizeof(*oinfo));
-
-    /* Retrieve the file's fileno */
-    H5F_GET_FILENO(loc->file, oinfo->fileno);
-
-    /* Set the object's address */
-    oinfo->addr = loc->addr;
-
-    /* Get class for object */
-    if(NULL == (obj_class = H5O_obj_class_real(oh)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object class")
-
-    /* Retrieve the type of the object */
-    oinfo->type = obj_class->type;
-
-    /* Set the object's reference count */
-    oinfo->rc = oh->nlink;
-
-    /* Get modification time for object */
-    if(oh->version > H5O_VERSION_1) {
-        oinfo->atime = oh->atime;
-        oinfo->mtime = oh->mtime;
-        oinfo->ctime = oh->ctime;
-        oinfo->btime = oh->btime;
-    } /* end if */
-    else {
-        htri_t	exists;                 /* Flag if header message of interest exists */
-
-        /* No information for access & modification fields */
-        /* (we stopped updating the "modification time" header message for
-         *      raw data changes, so the "modification time" header message
-         *      is closest to the 'change time', in POSIX terms - QAK)
-         */
-        oinfo->atime = 0;
-        oinfo->mtime = 0;
-        oinfo->btime = 0;
-
-        /* Might be information for modification time */
-        if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_ID)) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME message")
-        if(exists > 0) {
-            /* Get "old style" modification time info */
-            if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_MTIME_ID, &oinfo->ctime))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME message")
-        } /* end if */
-        else {
-            /* Check for "new style" modification time info */
-            if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_NEW_ID)) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME_NEW message")
-            if(exists > 0) {
-                /* Get "new style" modification time info */
-                if(NULL == H5O_msg_read_oh(loc->file, dxpl_id, oh, H5O_MTIME_NEW_ID, &oinfo->ctime))
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME_NEW message")
-            } /* end if */
-            else
-                oinfo->ctime = 0;
-        } /* end else */
-    } /* end else */
-
-    /* Get the information for the object header */
-    if(H5O_get_hdr_info_real(oh, &oinfo->hdr) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
-
-    /* Retrieve # of attributes */
-    if(H5O_attr_count_real(loc->file, dxpl_id, oh, &oinfo->num_attrs) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute count")
-
-    /* Get B-tree & heap metadata storage size, if requested */
-    if(want_ih_info) {
-        /* Check for 'bh_info' callback for this type of object */
-        if(obj_class->bh_info) {
-            /* Call the object's class 'bh_info' routine */
-            if((obj_class->bh_info)(loc, dxpl_id, oh, &oinfo->meta_size.obj) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object's btree & heap info")
-        } /* end if */
-
-        /* Get B-tree & heap info for any attributes */
-        if(oinfo->num_attrs > 0) {
-            if(H5O_attr_bh_info(loc->file, dxpl_id, oh, &oinfo->meta_size.attr) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute btree & heap info")
-        } /* end if */
-    } /* end if */
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_get_info() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_create_plist
- *
- * Purpose:	Retrieve the object creation properties for an object
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		November 28 2006
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_create_plist(const H5O_loc_t *loc, hid_t dxpl_id, H5P_genplist_t *oc_plist)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(oc_plist);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Set property values, if they were used for the object */
-    if(oh->version > H5O_VERSION_1) {
-        uint8_t ohdr_flags;             /* "User-visible" object header status flags */
-
-        /* Set attribute storage values */
-        if(H5P_set(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set max. # of compact attributes in property list")
-        if(H5P_set(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set min. # of dense attributes in property list")
-
-        /* Mask off non-"user visible" flags */
-        ohdr_flags = oh->flags & (H5O_HDR_ATTR_CRT_ORDER_TRACKED | H5O_HDR_ATTR_CRT_ORDER_INDEXED | H5O_HDR_STORE_TIMES);
-
-        /* Set object header flags */
-        if(H5P_set(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &ohdr_flags) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set object header flags")
-    } /* end if */
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_create_plist() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_nlinks
- *
- * Purpose:	Retrieve the number of link messages read in from the file
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		March 11 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_nlinks(const H5O_loc_t *loc, hid_t dxpl_id, hsize_t *nlinks)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-    HDassert(nlinks);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Retrieve the # of link messages seen when the object header was loaded */
-    *nlinks = oh->link_msgs_seen;
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_nlinks() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_obj_create
- *
- * Purpose:	Creates an object, in an abstract manner.
- *
- * Return:	Success:	Pointer to object opened
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *		April 9 2007
- *
- *-------------------------------------------------------------------------
- */
-void *
-H5O_obj_create(H5F_t *f, H5O_type_t obj_type, void *crt_info, H5G_loc_t *obj_loc,
-    hid_t dxpl_id)
-{
-    size_t u;                           /* Local index variable */
-    void *ret_value = NULL;             /* Return value */
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    /* Sanity checks */
-    HDassert(f);
-    HDassert(obj_type >= H5O_TYPE_GROUP && obj_type <= H5O_TYPE_NAMED_DATATYPE);
-    HDassert(crt_info);
-    HDassert(obj_loc);
-
-    /* Iterate through the object classes */
-    for(u = 0; u < NELMTS(H5O_obj_class_g); u++) {
-        /* Check for correct type of object to create */
-	if(H5O_obj_class_g[u]->type == obj_type) {
-            /* Call the object class's 'create' routine */
-            HDassert(H5O_obj_class_g[u]->create);
-            if(NULL == (ret_value = H5O_obj_class_g[u]->create(f, crt_info, obj_loc, dxpl_id)))
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, NULL, "unable to open object")
-
-            /* Break out of loop */
-            break;
-        } /* end if */
-    } /* end for */
-    HDassert(ret_value);
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_obj_create() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_oh_addr
- *
- * Purpose:	Retrieve the address of the object header
- *
- * Note:	This routine participates in the "Inlining C struct access"
- *		pattern, don't call it directly, use the appropriate macro
- *		defined in H5Oprivate.h.
- *
- * Return:	Success:	Valid haddr_t
- *		Failure:	HADDR_UNDEF
- *
- * Programmer:	Quincey Koziol
- *		March 15 2007
- *
- *-------------------------------------------------------------------------
- */
-haddr_t
-H5O_get_oh_addr(const H5O_t *oh)
-{
-    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    HDassert(oh);
-    HDassert(oh->chunk);
-
-    FUNC_LEAVE_NOAPI(oh->chunk[0].addr)
-} /* end H5O_get_oh_addr() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_rc_and_type
- *
- * Purpose:	Retrieve an object's reference count and type
- *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		November  4 2007
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_get_rc_and_type(const H5O_loc_t *loc, hid_t dxpl_id, unsigned *rc, H5O_type_t *otype)
-{
-    H5O_t *oh = NULL;                   /* Object header */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Check args */
-    HDassert(loc);
-
-    /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
-
-    /* Set the object's reference count */
-    if(rc)
-        *rc = oh->nlink;
-
-    /* Retrieve the type of the object */
-    if(otype)
-        if(H5O_obj_type_real(oh, otype) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
-
-done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_get_rc_and_type() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5O_free_visit_visited
- *
- * Purpose:     Free the key for an object visited during a group traversal
- *
- * Return:      Non-negative on success, negative on failure
- *
- * Programmer:  Quincey Koziol
- *	        Nov 25, 2007
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_free_visit_visited(void *item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNUSED *operator_data/*in,out*/)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    item = H5FL_FREE(H5_obj_t, item);
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_free_visit_visited() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_visit_cb
- *
- * Purpose:     Callback function for recursively visiting objects from a group
- *
- * Return:	Success:        Non-negative
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *	        Nov 25, 2007
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_visit_cb(hid_t H5_ATTR_UNUSED group, const char *name, const H5L_info_t *linfo,
-    void *_udata)
-{
-    H5O_iter_visit_ud_t *udata = (H5O_iter_visit_ud_t *)_udata;     /* User data for callback */
-    H5G_loc_t   obj_loc;                /* Location of object */
-    H5G_name_t  obj_path;            	/* Object's group hier. path */
-    H5O_loc_t   obj_oloc;            	/* Object's object location */
-    hbool_t     obj_found = FALSE;      /* Object at 'name' found */
-    herr_t ret_value = H5_ITER_CONT;    /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Sanity check */
-    HDassert(name);
-    HDassert(linfo);
-    HDassert(udata);
-
-    /* Check if this is a hard link */
-    if(linfo->type == H5L_TYPE_HARD) {
-        H5_obj_t obj_pos;       /* Object "position" for this object */
-
-        /* Set up opened group location to fill in */
-        obj_loc.oloc = &obj_oloc;
-        obj_loc.path = &obj_path;
-        H5G_loc_reset(&obj_loc);
-
-        /* Find the object using the LAPL passed in */
-        /* (Correctly handles mounted files) */
-        if(H5G_loc_find(udata->start_loc, name, &obj_loc/*out*/, udata->lapl_id, udata->dxpl_id) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, H5_ITER_ERROR, "object not found")
-        obj_found = TRUE;
-
-        /* Construct unique "position" for this object */
-        H5F_GET_FILENO(obj_oloc.file, obj_pos.fileno);
-        obj_pos.addr = obj_oloc.addr;
-
-        /* Check if we've seen the object the link references before */
-        if(NULL == H5SL_search(udata->visited, &obj_pos)) {
-            H5O_info_t oinfo;           /* Object info */
-
-            /* Get the object's info */
-            if(H5O_get_info(&obj_oloc, udata->dxpl_id, TRUE, &oinfo) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5_ITER_ERROR, "unable to get object info")
-
-            /* Make the application callback */
-            ret_value = (udata->op)(udata->obj_id, name, &oinfo, udata->op_data);
-
-            /* Check for continuing to visit objects */
-            if(ret_value == H5_ITER_CONT) {
-                /* If its ref count is > 1, we add it to the list of visited objects */
-                /* (because it could come up again during traversal) */
-                if(oinfo.rc > 1) {
-                    H5_obj_t *new_node;                  /* New object node for visited list */
-
-                    /* Allocate new object "position" node */
-                    if((new_node = H5FL_MALLOC(H5_obj_t)) == NULL)
-                        HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, H5_ITER_ERROR, "can't allocate object node")
-
-                    /* Set node information */
-                    *new_node = obj_pos;
-
-                    /* Add to list of visited objects */
-                    if(H5SL_insert(udata->visited, new_node, new_node) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "can't insert object node into visited list")
-                } /* end if */
-            } /* end if */
-        } /* end if */
-    } /* end if */
-
-done:
-    /* Release resources */
-    if(obj_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, H5_ITER_ERROR, "can't free location")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_visit_cb() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_visit
- *
- * Purpose:	Recursively visit an object and all the objects reachable
- *              from it.  If the starting object is a group, all the objects
- *              linked to from that group will be visited.  Links within
- *              each group are visited according to the order within the
- *              specified index (unless the specified index does not exist for
- *              a particular group, then the "name" index is used).
- *
- *              NOTE: Soft links and user-defined links are ignored during
- *              this operation.
- *
- *              NOTE: Each _object_ reachable from the initial group will only
- *              be visited once.  If multiple hard links point to the same
- *              object, the first link to the object's path (according to the
- *              iteration index and iteration order given) will be used to in
- *              the callback about the object.
- *
- * Return:	Success:	The return value of the first operator that
- *				returns non-zero, or zero if all members were
- *				processed with no operator returning non-zero.
- *
- *		Failure:	Negative if something goes wrong within the
- *				library, or the negative value returned by one
- *				of the operators.
- *
- * Programmer:	Quincey Koziol
- *		November 24 2007
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
-    H5_iter_order_t order, H5O_iterate_t op, void *op_data, hid_t lapl_id,
-    hid_t dxpl_id)
-{
-    H5O_iter_visit_ud_t udata;  /* User data for callback */
-    H5G_loc_t	loc;            /* Location of reference object */
-    H5G_loc_t   obj_loc;        /* Location used to open object */
-    H5G_name_t  obj_path;       /* Opened object group hier. path */
-    H5O_loc_t   obj_oloc;       /* Opened object object location */
-    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
-    H5O_info_t  oinfo;          /* Object info struct */
-    hid_t       obj_id = (-1);  /* ID of object */
-    herr_t      ret_value = FAIL;       /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* Portably initialize user data struct to zeros */
-    HDmemset(&udata, 0, sizeof(udata));
-
-    /* Check args */
-    if(H5G_loc(loc_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-
-    /* Set up opened group location to fill in */
-    obj_loc.oloc = &obj_oloc;
-    obj_loc.path = &obj_path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object's location */
-    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/, lapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
-    loc_found = TRUE;
-
-    /* Get the object's info */
-    if(H5O_get_info(&obj_oloc, dxpl_id, TRUE, &oinfo) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to get object info")
-
-    /* Open the object */
-    /* (Takes ownership of the obj_loc information) */
-    if((obj_id = H5O_open_by_loc(&obj_loc, lapl_id, dxpl_id, TRUE)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
-
-    /* Make callback for starting object */
-    if((ret_value = op(obj_id, ".", &oinfo, op_data)) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "can't visit objects")
-
-    /* Check return value of first callback */
-    if(ret_value != H5_ITER_CONT)
-        HGOTO_DONE(ret_value);
-
-    /* Check for object being a group */
-    if(oinfo.type == H5O_TYPE_GROUP) {
-        H5G_loc_t	start_loc;          /* Location of starting group */
-
-        /* Get the location of the starting group */
-        if(H5G_loc(obj_id, &start_loc) < 0)
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-
-        /* Set up user data for visiting links */
-        udata.obj_id = obj_id;
-        udata.start_loc = &start_loc;
-        udata.lapl_id = lapl_id;
-        udata.dxpl_id = dxpl_id;
-        udata.op = op;
-        udata.op_data = op_data;
-
-        /* Create skip list to store visited object information */
-        if((udata.visited = H5SL_create(H5SL_TYPE_OBJ, NULL)) == NULL)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create skip list for visited objects")
-
-        /* If its ref count is > 1, we add it to the list of visited objects */
-        /* (because it could come up again during traversal) */
-        if(oinfo.rc > 1) {
-            H5_obj_t *obj_pos;                  /* New object node for visited list */
-
-            /* Allocate new object "position" node */
-            if((obj_pos = H5FL_MALLOC(H5_obj_t)) == NULL)
-                HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "can't allocate object node")
-
-            /* Construct unique "position" for this object */
-            obj_pos->fileno = oinfo.fileno;
-            obj_pos->addr = oinfo.addr;
-
-            /* Add to list of visited objects */
-            if(H5SL_insert(udata.visited, obj_pos, obj_pos) < 0)
-                HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't insert object node into visited list")
-        } /* end if */
-
-        /* Call internal group visitation routine */
-        if((ret_value = H5G_visit(obj_id, ".", idx_type, order, H5O_visit_cb, &udata, lapl_id, dxpl_id)) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
-    } /* end if */
-
-done:
-    if(obj_id > 0) {
-        if(H5I_dec_app_ref(obj_id) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to close object")
-    } /* end if */
-    else if(loc_found && H5G_loc_free(&obj_loc) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
-    if(udata.visited)
-        H5SL_destroy(udata.visited, H5O_free_visit_visited, NULL);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_visit() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_inc_rc
- *
- * Purpose:	Increments the reference count on an object header
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_inc_rc(H5O_t *oh)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(oh);
-
-    /* Pin the object header when the reference count goes above 0 */
-    if(oh->rc == 0)
-        if(H5AC_pin_protected_entry(oh) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
-
-    /* Increment reference count */
-    oh->rc++;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_inc_rc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_dec_rc
- *
- * Purpose:	Decrements the reference count on an object header
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@hdfgroup.org
- *		Jul 13 2008
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_dec_rc(H5O_t *oh)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(oh);
-
-    /* Decrement reference count */
-    oh->rc--;
-
-    /* Unpin the object header when the reference count goes back to 0 */
-    if(oh->rc == 0)
-        if(H5AC_unpin_entry(oh) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dec_rc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:   H5O_dec_rc_by_loc
- *
- * Purpose:    Decrement the refcount of an object header, using its
- *              object location information.
- *
- * Return:     Non-negative on success/Negative on failure
- *
- * Programmer: Quincey Koziol
- *             koziol@hdfgroup.org
- *             Oct 08 2010
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O_dec_rc_by_loc(const H5O_loc_t *loc, hid_t dxpl_id)
-{
-    H5O_t       *oh = NULL;             /* Object header */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    /* check args */
-    HDassert(loc);
-
-    /* Get header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-       HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
-
-    /* Decrement the reference count on the object header */
-    /* (which will unpin it, if appropriate) */
-    if(H5O_dec_rc(oh) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
-
-done:
-    /* Release the object header from the cache */
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dec_rc_by_loc() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_get_proxy
- *
- * Purpose:	Retrieve the proxy for the object header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		July 24 2016
- *
- *-------------------------------------------------------------------------
- */
-H5AC_proxy_entry_t *
-H5O_get_proxy(const H5O_t *oh)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Check args */
-    HDassert(oh);
-
-    FUNC_LEAVE_NOAPI(oh->proxy)
-} /* end H5O_get_proxy() */
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O__free
- *
- * Purpose:	Destroys an object header.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		koziol@ncsa.uiuc.edu
- *		Jan 15 2003
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5O__free(H5O_t *oh)
-{
-    unsigned	u;                      /* Local index variable */
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_PACKAGE
-
-    /* check args */
-    HDassert(oh);
-    HDassert(0 == oh->rc);
-
-    /* Destroy chunks */
-    if(oh->chunk) {
-        for(u = 0; u < oh->nchunks; u++)
-            oh->chunk[u].image = H5FL_BLK_FREE(chunk_image, oh->chunk[u].image);
-
-        oh->chunk = (H5O_chunk_t *)H5FL_SEQ_FREE(H5O_chunk_t, oh->chunk);
-    } /* end if */
-
-    /* Destroy messages */
-    if(oh->mesg) {
-        for(u = 0; u < oh->nmesgs; u++) {
-#ifndef NDEBUG
-            /* Verify that message is clean, unless it could have been marked
-             * dirty by decoding */
-            if(oh->ndecode_dirtied && oh->mesg[u].dirty)
-                oh->ndecode_dirtied--;
-            else
-                HDassert(oh->mesg[u].dirty == 0);
-#endif /* NDEBUG */
-
-            H5O_msg_free_mesg(&oh->mesg[u]);
-        } /* end for */
-
-        /* Make sure we accounted for all the messages dirtied by decoding */
-        HDassert(!oh->ndecode_dirtied);
-
-        oh->mesg = (H5O_mesg_t *)H5FL_SEQ_FREE(H5O_mesg_t, oh->mesg);
-    } /* end if */
-
-    /* Destroy the proxy */
-    if(oh->proxy)
-        if(H5AC_proxy_entry_dest(oh->proxy) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy virtual entry used for proxy")
-
-    /* destroy object header */
-    oh = H5FL_FREE(H5O_t, oh);
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O__free() */
-
diff --git a/src/H5Oainfo.c b/src/H5Oainfo.c
index 44c6611..7f4f17f 100644
--- a/src/H5Oainfo.c
+++ b/src/H5Oainfo.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -36,24 +34,23 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_ainfo_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__ainfo_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_ainfo_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_ainfo_copy(const void *_mesg, void *_dest);
 static size_t H5O_ainfo_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_ainfo_free(void *_mesg);
-static herr_t H5O_ainfo_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    void *_mesg);
+static herr_t H5O__ainfo_free(void *_mesg);
+static herr_t H5O__ainfo_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
 static herr_t H5O_ainfo_pre_copy_file(H5F_t *file_src, const void *mesg_src,
     hbool_t *deleted, const H5O_copy_t *cpy_info, void *udata);
-static void *H5O_ainfo_copy_file(H5F_t *file_src, void *mesg_src,
+static void *H5O__ainfo_copy_file(H5F_t *file_src, void *mesg_src,
     H5F_t *file_dst, hbool_t *recompute_size, unsigned *mesg_flags,
-    H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-static herr_t H5O_ainfo_post_copy_file(const H5O_loc_t *src_oloc,
+    H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__ainfo_post_copy_file(const H5O_loc_t *src_oloc,
     const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst,
-    unsigned *mesg_flags, hid_t dxpl_id, H5O_copy_t *cpy_info);
-static herr_t H5O_ainfo_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-			     FILE * stream, int indent, int fwidth);
+    unsigned *mesg_flags, H5O_copy_t *cpy_info);
+static herr_t H5O__ainfo_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_AINFO[1] = {{
@@ -61,22 +58,22 @@ const H5O_msg_class_t H5O_MSG_AINFO[1] = {{
     "ainfo",                 	/*message name for debugging    */
     sizeof(H5O_ainfo_t),     	/*native message size           */
     0,				/* messages are sharable?       */
-    H5O_ainfo_decode,        	/*decode message                */
+    H5O__ainfo_decode,        	/*decode message                */
     H5O_ainfo_encode,        	/*encode message                */
     H5O_ainfo_copy,          	/*copy the native value         */
     H5O_ainfo_size,          	/*size of symbol table entry    */
     NULL,                   	/*default reset method          */
-    H5O_ainfo_free,	        /* free method			*/
-    H5O_ainfo_delete,	        /* file delete method		*/
+    H5O__ainfo_free,	        /* free method			*/
+    H5O__ainfo_delete,	        /* file delete method		*/
     NULL,			/* link method			*/
     NULL,			/*set share method		*/
     NULL,		    	/*can share method		*/
     H5O_ainfo_pre_copy_file,	/* pre copy native value to file */
-    H5O_ainfo_copy_file,	/* copy native value to file    */
-    H5O_ainfo_post_copy_file,   /* post copy native value to file */
+    H5O__ainfo_copy_file,	/* copy native value to file    */
+    H5O__ainfo_post_copy_file,  /* post copy native value to file */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_ainfo_debug          	/*debug the message             */
+    H5O__ainfo_debug          	/*debug the message             */
 }};
 
 /* Current version of attribute info information */
@@ -92,7 +89,7 @@ H5FL_DEFINE_STATIC(H5O_ainfo_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_ainfo_decode
+ * Function:    H5O__ainfo_decode
  *
  * Purpose:     Decode a message and return a pointer to a newly allocated one.
  *
@@ -106,14 +103,15 @@ H5FL_DEFINE_STATIC(H5O_ainfo_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_ainfo_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__ainfo_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_ainfo_t	*ainfo = NULL;  /* Attribute info */
     unsigned char flags;        /* Flags for encoding attribute info */
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -163,7 +161,7 @@ done:
         ainfo = H5FL_FREE(H5O_ainfo_t, ainfo);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_ainfo_decode() */
+} /* end H5O__ainfo_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -297,9 +295,9 @@ H5O_ainfo_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_ainfo_free
+ * Function:	H5O__ainfo_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -309,20 +307,20 @@ H5O_ainfo_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_ainfo_free(void *mesg)
+H5O__ainfo_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_ainfo_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_ainfo_free() */
+} /* end H5O__ainfo_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_ainfo_delete
+ * Function:    H5O__ainfo_delete
  *
  * Purpose:     Free file space referenced by message.  Note that open_oh
  *              *must* be non-NULL - this means that calls to
@@ -336,12 +334,12 @@ H5O_ainfo_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_ainfo_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
+H5O__ainfo_delete(H5F_t *f, H5O_t *open_oh, void *_mesg)
 {
     H5O_ainfo_t *ainfo = (H5O_ainfo_t *)_mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -349,15 +347,14 @@ H5O_ainfo_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
     HDassert(open_oh);
 
     /* If the object is using "dense" attribute storage, delete it */
-    if(H5F_addr_defined(ainfo->fheap_addr)) {
+    if(H5F_addr_defined(ainfo->fheap_addr))
         /* Delete the attribute */
-        if(H5A_dense_delete(f, dxpl_id, ainfo) < 0)
+        if(H5A__dense_delete(f, ainfo) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free dense attribute storage")
-    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_ainfo_delete() */
+} /* end H5O__ainfo_delete() */
 
 
 /*-------------------------------------------------------------------------
@@ -395,7 +392,7 @@ H5O_ainfo_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSE
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_ainfo_copy_file
+ * Function:    H5O__ainfo_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
  *
@@ -408,15 +405,15 @@ H5O_ainfo_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSE
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_ainfo_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
+H5O__ainfo_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
     hbool_t H5_ATTR_UNUSED *recompute_size, unsigned H5_ATTR_UNUSED *mesg_flags,
-    H5O_copy_t *cpy_info, void H5_ATTR_UNUSED *udata, hid_t dxpl_id)
+    H5O_copy_t *cpy_info, void H5_ATTR_UNUSED *udata)
 {
     H5O_ainfo_t *ainfo_src = (H5O_ainfo_t *)mesg_src;
     H5O_ainfo_t *ainfo_dst = NULL;
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(file_src);
@@ -436,13 +433,13 @@ H5O_ainfo_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
         /* Prepare to copy dense attributes - actual copy in post_copy */
 
         /* Set copied metadata tag */
-        H5_BEGIN_TAG(dxpl_id, H5AC__COPIED_TAG, NULL);
+        H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
-        if(H5A_dense_create(file_dst, dxpl_id, ainfo_dst) < 0)
+        if(H5A__dense_create(file_dst, ainfo_dst) < 0)
             HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINIT, NULL, "unable to create dense storage for attributes")
 
         /* Reset metadata tag */
-        H5_END_TAG(NULL);
+        H5_END_TAG
     } /* end if */
 
     /* Set return value */
@@ -454,11 +451,11 @@ done:
         ainfo_dst = H5FL_FREE(H5O_ainfo_t, ainfo_dst);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_ainfo_copy_file() */
+} /* H5O__ainfo_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_ainfo_post_copy_file
+ * Function:    H5O__ainfo_post_copy_file
  *
  * Purpose:     Finish copying a message from between files.
  *              We have to copy the values of a reference attribute in the
@@ -474,30 +471,28 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_ainfo_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
+H5O__ainfo_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
     H5O_loc_t *dst_oloc, void *mesg_dst, unsigned H5_ATTR_UNUSED *mesg_flags,
-    hid_t dxpl_id, H5O_copy_t *cpy_info)
+    H5O_copy_t *cpy_info)
 {
     const H5O_ainfo_t *ainfo_src = (const H5O_ainfo_t *)mesg_src;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(ainfo_src);
 
-    if(H5F_addr_defined(ainfo_src->fheap_addr)) {
-        if(H5A_dense_post_copy_file_all(src_oloc, ainfo_src, dst_oloc,
-                (H5O_ainfo_t *)mesg_dst, dxpl_id, cpy_info) < 0)
-        HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, FAIL, "can't copy attribute")
-    } /* end if */
+    if(H5F_addr_defined(ainfo_src->fheap_addr))
+        if(H5A__dense_post_copy_file_all(src_oloc, ainfo_src, dst_oloc, (H5O_ainfo_t *)mesg_dst, cpy_info) < 0)
+            HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, FAIL, "can't copy attribute")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_ainfo_post_copy_file() */
+} /* H5O__ainfo_post_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_ainfo_debug
+ * Function:    H5O__ainfo_debug
  *
  * Purpose:     Prints debugging info for a message.
  *
@@ -510,12 +505,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_ainfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__ainfo_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth)
 {
     const H5O_ainfo_t       *ainfo = (const H5O_ainfo_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -541,5 +536,5 @@ H5O_ainfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const voi
 
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_ainfo_debug() */
+} /* end H5O__ainfo_debug() */
 
diff --git a/src/H5Oalloc.c b/src/H5Oalloc.c
index 40c9c38..570e16d 100644
--- a/src/H5Oalloc.c
+++ b/src/H5Oalloc.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -63,21 +61,20 @@ static herr_t H5O_add_gap(H5F_t *f, H5O_t *oh, unsigned chunkno,
     hbool_t *chk_dirtied, size_t idx, uint8_t *new_gap_loc, size_t new_gap_size);
 static herr_t H5O_eliminate_gap(H5O_t *oh, hbool_t *chk_dirtied,
     H5O_mesg_t *mesg, uint8_t *new_gap_loc, size_t new_gap_size);
-static herr_t H5O_alloc_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t null_idx,
+static herr_t H5O__alloc_null(H5F_t *f, H5O_t *oh, size_t null_idx,
     const H5O_msg_class_t *new_type, void *new_native, size_t new_size);
-static htri_t H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
+static htri_t H5O__alloc_extend_chunk(H5F_t *f, H5O_t *oh,
     unsigned chunkno, size_t size, size_t *msg_idx);
 static herr_t H5O__alloc_find_best_nonnull(const H5F_t *f, const H5O_t *oh, size_t *size,
     H5O_msg_alloc_info_t *found_msg);
-static herr_t H5O_alloc_new_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
+static herr_t H5O__alloc_new_chunk(H5F_t *f, H5O_t *oh, size_t size,
     size_t *new_idx);
 static herr_t H5O__alloc_find_best_null(const H5O_t *oh, size_t size, size_t *mesg_idx);
-static htri_t H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u);
-static htri_t H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
-static htri_t H5O_merge_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
-static htri_t H5O_remove_empty_chunks(H5F_t *f, hid_t dxpl_id, H5O_t *oh);
-static herr_t H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    unsigned chunkno);
+static htri_t H5O_move_cont(H5F_t *f, H5O_t *oh, unsigned cont_u);
+static htri_t H5O_move_msgs_forward(H5F_t *f, H5O_t *oh);
+static htri_t H5O_merge_null(H5F_t *f, H5O_t *oh);
+static htri_t H5O_remove_empty_chunks(H5F_t *f, H5O_t *oh);
+static herr_t H5O__alloc_shrink_chunk(H5F_t *f, H5O_t *oh, unsigned chunkno);
 
 
 /*********************/
@@ -327,7 +324,7 @@ H5O_eliminate_gap(H5O_t *oh, hbool_t *chk_dirtied, H5O_mesg_t *mesg,
 
 /*-------------------------------------------------------------------------
  *
- * Function:    H5O_alloc_null
+ * Function:    H5O__alloc_null
  *
  * Purpose:     Allocate room for a new message from a null message
  *
@@ -340,7 +337,7 @@ H5O_eliminate_gap(H5O_t *oh, hbool_t *chk_dirtied, H5O_mesg_t *mesg,
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_alloc_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t null_idx,
+H5O__alloc_null(H5F_t *f, H5O_t *oh, size_t null_idx,
     const H5O_msg_class_t *new_type, void *new_native, size_t new_size)
 {
     H5O_chunk_proxy_t *chk_proxy = NULL;        /* Chunk that message is in */
@@ -348,7 +345,7 @@ H5O_alloc_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t null_idx,
     H5O_mesg_t *alloc_msg;              /* Pointer to null message to allocate out of */
     herr_t ret_value = SUCCEED; 	/* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(oh);
@@ -359,7 +356,7 @@ H5O_alloc_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t null_idx,
     alloc_msg = &oh->mesg[null_idx];
 
     /* Protect chunk */
-    if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, alloc_msg->chunkno)))
+    if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, alloc_msg->chunkno)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
     /* Check if there's a need to split the null message */
@@ -426,11 +423,11 @@ H5O_alloc_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t null_idx,
 
 done:
     /* Release chunk */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_alloc_null() */
+} /* H5O__alloc_null() */
 
 
 /*-------------------------------------------------------------------------
@@ -482,7 +479,7 @@ done:
 
 /*-------------------------------------------------------------------------
  *
- * Function:    H5O_alloc_extend_chunk
+ * Function:    H5O__alloc_extend_chunk
  *
  * Purpose:     Attempt to extend a chunk that is allocated on disk.
  *
@@ -509,8 +506,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno,
-    size_t size, size_t *msg_idx)
+H5O__alloc_extend_chunk(H5F_t *f, H5O_t *oh, unsigned chunkno, size_t size,
+    size_t *msg_idx)
 {
     H5O_chunk_proxy_t *chk_proxy = NULL;    /* Chunk that message is in */
     hbool_t     chk_dirtied = FALSE;        /* Flag for unprotecting chunk */
@@ -527,7 +524,7 @@ H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno,
     size_t      u;              /* Local index variable */
     htri_t      ret_value = TRUE; 	/* return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f != NULL);
@@ -592,12 +589,11 @@ H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno,
     } /* end if */
 
     /* Protect chunk */
-    if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, chunkno)))
+    if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, chunkno)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
     /* Determine whether the chunk can be extended */
-    was_extended = H5MF_try_extend(f, dxpl_id, H5FD_MEM_OHDR, oh->chunk[chunkno].addr,
-                                 (hsize_t)(oh->chunk[chunkno].size), (hsize_t)(delta + extra_prfx_size));
+    was_extended = H5MF_try_extend(f, H5FD_MEM_OHDR, oh->chunk[chunkno].addr, (hsize_t)(oh->chunk[chunkno].size), (hsize_t)(delta + extra_prfx_size));
     if(was_extended < 0) /* error */
         HGOTO_ERROR(H5E_OHDR, H5E_CANTEXTEND, FAIL, "can't tell if we can extend chunk")
     else if(was_extended == FALSE)     /* can't extend -- we are done */
@@ -676,7 +672,7 @@ H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno,
             unsigned cont_chunkno = oh->mesg[u].chunkno;    /* Chunk # for continuation message */
 
             /* Protect chunk containing continuation message */
-            if(NULL == (chk_proxy2 = H5O_chunk_protect(f, dxpl_id, oh, cont_chunkno)))
+            if(NULL == (chk_proxy2 = H5O__chunk_protect(f, oh, cont_chunkno)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
             /* Adjust size in continuation message */
@@ -688,7 +684,7 @@ H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno,
             chk_dirtied2 = TRUE;
 
             /* Release chunk containing continuation message */
-            if(H5O_chunk_unprotect(f, dxpl_id, chk_proxy2, chk_dirtied2) < 0)
+            if(H5O__chunk_unprotect(f, chk_proxy2, chk_dirtied2) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
         } /* end if */
     } /* end for */
@@ -702,11 +698,11 @@ H5O_alloc_extend_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno,
 
 done:
     /* Release chunk */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_alloc_extend_chunk() */
+} /* H5O__alloc_extend_chunk() */
 
 
 /*-------------------------------------------------------------------------
@@ -887,8 +883,8 @@ H5O__alloc_find_best_nonnull(const H5F_t *f, const H5O_t *oh, size_t *size,
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
-    size_t found_null, const H5O_msg_alloc_info_t *found_msg, size_t *new_idx)
+H5O__alloc_chunk(H5F_t *f, H5O_t *oh, size_t size, size_t found_null,
+    const H5O_msg_alloc_info_t *found_msg, size_t *new_idx)
 {
     H5O_mesg_t *curr_msg;               /* Pointer to current message to operate on */
     H5O_chunk_proxy_t *chk_proxy;       /* Chunk that message is in */
@@ -925,7 +921,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
     size +=  H5O_SIZEOF_CHKHDR_OH(oh);
 
     /* Allocate space in file to hold the new chunk */
-    new_chunk_addr = H5MF_alloc(f, H5FD_MEM_OHDR, dxpl_id, (hsize_t)size);
+    new_chunk_addr = H5MF_alloc(f, H5FD_MEM_OHDR, (hsize_t)size);
     if(!H5F_addr_defined(new_chunk_addr))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, FAIL, "unable to allocate space for new chunk")
 
@@ -976,7 +972,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
             H5O_mesg_t *null_msg;       /* Pointer to new null message */
 
             /* Protect last chunk */
-            if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, chunkno - 1)))
+            if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, chunkno - 1)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
             /* Copy each message to the new location */
@@ -1025,7 +1021,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
             oh->chunk[chunkno - 1].gap = 0;
 
             /* Release chunk, marking it dirty */
-            if(H5O_chunk_unprotect(f, dxpl_id, chk_proxy, TRUE) < 0)
+            if(H5O__chunk_unprotect(f, chk_proxy, TRUE) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
         } /* end if */
         else {
@@ -1035,7 +1031,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
             H5O_mesg_t *null_msg;       /* Pointer to new null message */
 
             /* Protect chunk */
-            if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, oh->mesg[found_msg->msgno].chunkno)))
+            if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, oh->mesg[found_msg->msgno].chunkno)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
             /* Create null message for space that message to copy currently occupies */
@@ -1074,7 +1070,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
                 null_msg->raw_size += found_msg->null_size;
 
                 /* Release any information/memory for message */
-                H5O_msg_free_mesg(old_null_msg);
+                H5O__msg_free_mesg(old_null_msg);
 
                 /* Remove null message from list of messages */
                 if(found_msg->null_msgno < (oh->nmesgs - 1))
@@ -1092,7 +1088,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
             null_msg->dirty = TRUE;
 
             /* Release chunk, marking it dirty */
-            if(H5O_chunk_unprotect(f, dxpl_id, chk_proxy, TRUE) < 0)
+            if(H5O__chunk_unprotect(f, chk_proxy, TRUE) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
         } /* end if */
     } /* end if */
@@ -1108,7 +1104,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
     oh->mesg[idx].chunkno = chunkno;
 
     /* Insert the new chunk into the cache */
-    if(H5O_chunk_add(f, dxpl_id, oh, chunkno, oh->mesg[found_null].chunkno) < 0)
+    if(H5O__chunk_add(f, oh, chunkno, oh->mesg[found_null].chunkno) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't add new chunk to cache")
 
     /* Initialize the continuation information */
@@ -1119,7 +1115,7 @@ H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
     cont->chunkno = chunkno;
 
     /* Split the null message and point at continuation message */
-    if(H5O_alloc_null(f, dxpl_id, oh, found_null, H5O_MSG_CONT, cont, cont_size) < 0)
+    if(H5O__alloc_null(f, oh, found_null, H5O_MSG_CONT, cont, cont_size) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't split null message")
 
     /* Set new message index value */
@@ -1131,7 +1127,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_alloc_new_chunk
+ * Function:    H5O__alloc_new_chunk
  *
  * Purpose:     Allocates a new chunk for the object header, including
  *		file space.
@@ -1166,14 +1162,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_alloc_new_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size, size_t *new_idx)
+H5O__alloc_new_chunk(H5F_t *f, H5O_t *oh, size_t size, size_t *new_idx)
 {
     size_t      cont_size;              /*continuation message size     */
     size_t      idx;                    /* Message number */
     H5O_msg_alloc_info_t  found_msg;    /* Best fit non-null message */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(oh);
@@ -1194,12 +1190,12 @@ H5O_alloc_new_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size, size_t *new
     } /* end if */
 
     /* Allocate and initialize new chunk in the file */
-    if(H5O__alloc_chunk(f, dxpl_id, oh, size, idx, &found_msg, new_idx) < 0)
+    if(H5O__alloc_chunk(f, oh, size, idx, &found_msg, new_idx) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, FAIL, "can't allocate new object header chunk")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_alloc_new_chunk() */
+} /* H5O__alloc_new_chunk() */
 
 
 /*-------------------------------------------------------------------------
@@ -1279,7 +1275,7 @@ H5O__alloc_find_best_null(const H5O_t *oh, size_t size, size_t *mesg_idx)
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_alloc
+ * Function:    H5O__alloc
  *
  * Purpose:     Allocate enough space in the object header for this message.
  *
@@ -1292,7 +1288,7 @@ H5O__alloc_find_best_null(const H5O_t *oh, size_t size, size_t *mesg_idx)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
+H5O__alloc(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
     const void *mesg, size_t *mesg_idx)
 {
     size_t raw_size;            /* Raw size of message */
@@ -1300,7 +1296,7 @@ H5O_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
     size_t idx;                 /* Index of message which fits allocation */
     herr_t ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(oh);
@@ -1334,7 +1330,7 @@ H5O_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
         for(chunkno = 0; chunkno < oh->nchunks; chunkno++) {
             htri_t	tri_result;     /* Status from attempting to extend chunk */
 
-            if((tri_result = H5O_alloc_extend_chunk(f, dxpl_id, oh, chunkno, raw_size, &idx)) < 0)
+            if((tri_result = H5O__alloc_extend_chunk(f, oh, chunkno, raw_size, &idx)) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTEXTEND, FAIL, "can't extend existing chunk")
             if(tri_result == TRUE)
 		break;
@@ -1342,13 +1338,13 @@ H5O_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
 
         /* If we were not able to extend a chunk, create a new one */
         if(idx >= oh->nmesgs)
-            if(H5O_alloc_new_chunk(f, dxpl_id, oh, raw_size, &idx) < 0)
+            if(H5O__alloc_new_chunk(f, oh, raw_size, &idx) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "unable to create a new object header data chunk")
     } /* end if */
     HDassert(idx < oh->nmesgs);
 
     /* Split the null message and point at continuation message */
-    if(H5O_alloc_null(f, dxpl_id, oh, idx, type, NULL, aligned_size) < 0)
+    if(H5O__alloc_null(f, oh, idx, type, NULL, aligned_size) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't split null message")
 
     /* Mark object header as dirty in cache */
@@ -1360,7 +1356,7 @@ H5O_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_alloc() */
+} /* H5O__alloc() */
 
 
 /*-------------------------------------------------------------------------
@@ -1378,8 +1374,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_release_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_mesg_t *mesg,
-    hbool_t adj_link)
+H5O_release_mesg(H5F_t *f, H5O_t *oh, H5O_mesg_t *mesg, hbool_t adj_link)
 {
     H5O_chunk_proxy_t *chk_proxy = NULL;    /* Chunk that message is in */
     hbool_t chk_dirtied = FALSE;            /* Flag for unprotecting chunk */
@@ -1393,18 +1388,17 @@ H5O_release_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_mesg_t *mesg,
     HDassert(mesg);
 
     /* Check if we should operate on the message */
-    if(adj_link) {
+    if(adj_link)
         /* Free any space referred to in the file from this message */
-        if(H5O_delete_mesg(f, dxpl_id, oh, mesg) < 0)
+        if(H5O__delete_mesg(f, oh, mesg) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
-    } /* end if */
 
     /* Protect chunk */
-    if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, mesg->chunkno)))
+    if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, mesg->chunkno)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header chunk")
 
     /* Free any native information */
-    H5O_msg_free_mesg(mesg);
+    H5O__msg_free_mesg(mesg);
 
     /* Change message type to nil and zero it */
     mesg->type = H5O_MSG_NULL;
@@ -1429,7 +1423,7 @@ H5O_release_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_mesg_t *mesg,
 
 done:
     /* Release chunk, if not already done */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1450,7 +1444,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u)
+H5O_move_cont(H5F_t *f, H5O_t *oh, unsigned cont_u)
 {
     H5O_chunk_proxy_t *chk_proxy = NULL;        /* Chunk that continuation message is in */
     H5O_mesg_t 	*cont_msg;	/* Pointer to the continuation message */
@@ -1466,7 +1460,7 @@ H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u)
 
     /* Get initial information */
     cont_msg = &oh->mesg[cont_u];
-    H5O_LOAD_NATIVE(f, dxpl_id, 0, oh, cont_msg, FAIL)
+    H5O_LOAD_NATIVE(f, 0, oh, cont_msg, FAIL)
     deleted_chunkno = ((H5O_cont_t *)(cont_msg->native))->chunkno;
 
     /* Check if continuation message is pointing to the last chunk */
@@ -1506,11 +1500,11 @@ H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u)
 
             /* Convert continuation message into a null message.  Do not delete
              * the target chunk yet, so we can still copy messages from it. */
-            if(H5O_release_mesg(f, dxpl_id, oh, cont_msg, FALSE) < 0)
+            if(H5O_release_mesg(f, oh, cont_msg, FALSE) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to convert into null message")
 
             /* Protect chunk */
-            if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, cont_chunkno)))
+            if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, cont_chunkno)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header chunk")
 
             /* Move message(s) forward into continuation message */
@@ -1536,7 +1530,7 @@ H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u)
                 } /* end if */
 
             /* Delete the target chunk */
-            if(H5O_chunk_delete(f, dxpl_id, oh, deleted_chunkno) < 0)
+            if(H5O__chunk_delete(f, oh, deleted_chunkno) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to remove chunk from cache")
 
             HDassert(move_start <= (move_end + gap_size));
@@ -1560,7 +1554,7 @@ H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u)
                 } /* end if */
 
                 /* Release any information/memory for continuation message */
-                H5O_msg_free_mesg(cont_msg);
+                H5O__msg_free_mesg(cont_msg);
                 if(cont_u < (oh->nmesgs - 1))
                     HDmemmove(&oh->mesg[cont_u], &oh->mesg[cont_u + 1], ((oh->nmesgs - 1) - cont_u) * sizeof(H5O_mesg_t));
                 oh->nmesgs--;
@@ -1574,7 +1568,7 @@ H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u)
                     /* Remove all null messages in deleted chunk from list of messages */
                     if(curr_msg->type->id == H5O_NULL_ID) {
                         /* Release any information/memory for message */
-                        H5O_msg_free_mesg(curr_msg);
+                        H5O__msg_free_mesg(curr_msg);
                         chk_dirtied = TRUE;
 
                         /* Remove from message list */
@@ -1596,7 +1590,7 @@ H5O_move_cont(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned cont_u)
 
 done:
     /* Release chunk, if not already done */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1618,7 +1612,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
+H5O_move_msgs_forward(H5F_t *f, H5O_t *oh)
 {
     H5O_chunk_proxy_t *null_chk_proxy = NULL;  /* Chunk that null message is in */
     H5O_chunk_proxy_t *curr_chk_proxy = NULL;  /* Chunk that message is in */
@@ -1666,7 +1660,7 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             /* (We'll merge them together later, in another routine) */
                             if(H5O_NULL_ID != nonnull_msg->type->id) {
                                 /* Protect chunk */
-                                if(NULL == (null_chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, curr_msg->chunkno)))
+                                if(NULL == (null_chk_proxy = H5O__chunk_protect(f, oh, curr_msg->chunkno)))
                                     HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
                                 /* Copy raw data for non-null message to new location */
@@ -1685,7 +1679,7 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                                 curr_msg->dirty = TRUE;
 
                                 /* Release chunk, marking it dirty */
-                                if(H5O_chunk_unprotect(f, dxpl_id, null_chk_proxy, TRUE) < 0)
+                                if(H5O__chunk_unprotect(f, null_chk_proxy, TRUE) < 0)
                                     HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
                                 null_chk_proxy = NULL;
 
@@ -1712,7 +1706,7 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                 if(H5O_CONT_ID == curr_msg->type->id) {
                     htri_t status;      /* Status from moving messages */
 
-                    if((status = H5O_move_cont(f, dxpl_id, oh, u)) < 0)
+                    if((status = H5O_move_cont(f, oh, u)) < 0)
                         HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "Error in moving messages into cont message")
                     else if(status > 0) { /* Message(s) got moved into "continuation" message */
                         packed_msg = TRUE;
@@ -1732,9 +1726,9 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                         old_raw = curr_msg->raw;
 
                         /* Protect chunks */
-                        if(NULL == (null_chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, null_msg->chunkno)))
+                        if(NULL == (null_chk_proxy = H5O__chunk_protect(f, oh, null_msg->chunkno)))
                             HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
-                        if(NULL == (curr_chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, curr_msg->chunkno)))
+                        if(NULL == (curr_chk_proxy = H5O__chunk_protect(f, oh, curr_msg->chunkno)))
                             HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
                         /* If the message being moved is a continuation
@@ -1756,37 +1750,42 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             HDassert(((H5O_cont_t *)(curr_msg->native))->chunkno > 0);
 
                             /* Protect continuation message target chunk */
-                            if(NULL == (cont_targ_chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, ((H5O_cont_t *)(curr_msg->native))->chunkno)))
+                            if(NULL == (cont_targ_chk_proxy = H5O__chunk_protect(f, oh, ((H5O_cont_t *)(curr_msg->native))->chunkno)))
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
-                            /* Remove flush dependency on old continuation
-                             * message chunk */
-                            HDassert(cont_targ_chk_proxy);
-                            HDassert(cont_targ_chk_proxy->parent);
-                            HDassert(curr_chk_proxy);
-                            HDassert((void *)curr_chk_proxy == cont_targ_chk_proxy->parent);
+                            /* Check for flush dependency on previous continuation chunk */
+                            /* (As opposed to chunk 0) */
+                            if(cont_targ_chk_proxy->fd_parent) {
+                                /* Remove flush dependency on old continuation
+                                 * message chunk */
+                                HDassert(cont_targ_chk_proxy);
+                                HDassert(curr_chk_proxy);
+                                HDassert((void *)curr_chk_proxy == cont_targ_chk_proxy->fd_parent);
 
-                            if(H5AC_destroy_flush_dependency(curr_chk_proxy, cont_targ_chk_proxy) < 0)
-                                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
+                                if(H5AC_destroy_flush_dependency(curr_chk_proxy, cont_targ_chk_proxy) < 0)
+                                    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
 
-                            cont_targ_chk_proxy->parent = NULL;
+                                cont_targ_chk_proxy->fd_parent = NULL;
+                            } /* end if */
 
-                            /* Create flush dependency on new continuation
-                             * message chunk */
-                            if(H5AC_create_flush_dependency(null_chk_mdc_obj, cont_targ_chk_proxy) < 0)
-                                HGOTO_ERROR(H5E_OHDR, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
+                            /* Avoid (another) flush dependency on chunk 0 */
+                            if(0 != null_msg->chunkno) {
+                                /* Sanity checks */
+                                HDassert(null_chk_mdc_obj);
+                                HDassert(((H5C_cache_entry_t *)null_chk_mdc_obj)->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
+                                HDassert(((H5C_cache_entry_t *)null_chk_mdc_obj)->type);
+                                HDassert(((H5C_cache_entry_t *)null_chk_mdc_obj)->type->id == H5AC_OHDR_CHK_ID);
 
-                            HDassert(null_chk_mdc_obj);
-                            HDassert(((H5C_cache_entry_t *)null_chk_mdc_obj)->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
-                            HDassert(((H5C_cache_entry_t *)null_chk_mdc_obj)->type);
-                            HDassert((((H5C_cache_entry_t *)null_chk_mdc_obj)->type->id == H5AC_OHDR_ID) ||
-                                     (((H5C_cache_entry_t *)null_chk_mdc_obj)->type->id == H5AC_OHDR_CHK_ID));
+                                /* Create flush dependency on new continuation
+                                 * message chunk */
+                                if(H5AC_create_flush_dependency(null_chk_mdc_obj, cont_targ_chk_proxy) < 0)
+                                    HGOTO_ERROR(H5E_OHDR, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
 
-                            cont_targ_chk_proxy->parent = null_chk_mdc_obj;
+                                cont_targ_chk_proxy->fd_parent = null_chk_mdc_obj;
+                            } /* end if */
 
-                            /* Unprotect continuation message target chunk
-                             */
-                            if(H5O_chunk_unprotect(f, dxpl_id, cont_targ_chk_proxy, FALSE) < 0)
+                            /* Unprotect continuation message target chunk */
+                            if(H5O__chunk_unprotect(f, cont_targ_chk_proxy, FALSE) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
                             cont_targ_chk_proxy = NULL;
                         } /* end if */
@@ -1811,7 +1810,7 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             null_chk_dirtied = TRUE;
 
                             /* Release current chunk, marking it dirty */
-                            if(H5O_chunk_unprotect(f, dxpl_id, curr_chk_proxy, curr_chk_dirtied) < 0)
+                            if(H5O__chunk_unprotect(f, curr_chk_proxy, curr_chk_dirtied) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
                             curr_chk_proxy = NULL;
                             curr_chk_dirtied = FALSE;
@@ -1826,7 +1825,7 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             } /* end if */
 
                             /* Release null chunk, marking it dirty */
-                            if(H5O_chunk_unprotect(f, dxpl_id, null_chk_proxy, null_chk_dirtied) < 0)
+                            if(H5O__chunk_unprotect(f, null_chk_proxy, null_chk_dirtied) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
                             null_chk_proxy = NULL;
                             null_chk_dirtied = FALSE;
@@ -1875,7 +1874,7 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             } /* end else */
 
                             /* Release null message's chunk, marking it dirty */
-                            if(H5O_chunk_unprotect(f, dxpl_id, null_chk_proxy, null_chk_dirtied) < 0)
+                            if(H5O__chunk_unprotect(f, null_chk_proxy, null_chk_dirtied) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
                             null_chk_proxy = NULL;
                             null_chk_dirtied = FALSE;
@@ -1901,7 +1900,7 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             } /* end if */
 
                             /* Release new null message's chunk, marking it dirty */
-                            if(H5O_chunk_unprotect(f, dxpl_id, curr_chk_proxy, curr_chk_dirtied) < 0)
+                            if(H5O__chunk_unprotect(f, curr_chk_proxy, curr_chk_dirtied) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
                             curr_chk_proxy = NULL;
                             curr_chk_dirtied = FALSE;
@@ -1935,11 +1934,11 @@ H5O_move_msgs_forward(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
 
 done:
     if(ret_value < 0) {
-        if(null_chk_proxy && H5O_chunk_unprotect(f, dxpl_id, null_chk_proxy, null_chk_dirtied) < 0)
+        if(null_chk_proxy && H5O__chunk_unprotect(f, null_chk_proxy, null_chk_dirtied) < 0)
             HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect null object header chunk")
-        if(curr_chk_proxy && H5O_chunk_unprotect(f, dxpl_id, curr_chk_proxy, curr_chk_dirtied) < 0)
+        if(curr_chk_proxy && H5O__chunk_unprotect(f, curr_chk_proxy, curr_chk_dirtied) < 0)
             HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect current object header chunk")
-        if(cont_targ_chk_proxy && H5O_chunk_unprotect(f, dxpl_id, cont_targ_chk_proxy, FALSE) < 0)
+        if(cont_targ_chk_proxy && H5O__chunk_unprotect(f, cont_targ_chk_proxy, FALSE) < 0)
             HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect continuation message target object header chunk")
     } /* end if */
     else
@@ -1964,7 +1963,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_merge_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
+H5O_merge_null(H5F_t *f, H5O_t *oh)
 {
     hbool_t merged_msg;                 /* Flag to indicate that messages were merged */
     hbool_t did_merging = FALSE;        /* Whether any messages were merged */
@@ -2026,10 +2025,10 @@ H5O_merge_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             htri_t result;
 
                             /* Release any information/memory for second message */
-                            H5O_msg_free_mesg(curr_msg2);
+                            H5O__msg_free_mesg(curr_msg2);
 
                             /* Protect chunk */
-                            if(NULL == (curr_chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, curr_msg->chunkno)))
+                            if(NULL == (curr_chk_proxy = H5O__chunk_protect(f, oh, curr_msg->chunkno)))
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
                             /* Adjust first message address and extend length to cover second message */
@@ -2040,7 +2039,7 @@ H5O_merge_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             curr_msg->dirty = TRUE;
 
                             /* Release new null message's chunk, marking it dirty */
-                            if(H5O_chunk_unprotect(f, dxpl_id, curr_chk_proxy, TRUE) < 0)
+                            if(H5O__chunk_unprotect(f, curr_chk_proxy, TRUE) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
 
                             /* Remove second message from list of messages */
@@ -2052,7 +2051,7 @@ H5O_merge_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                             oh->nmesgs--;
 
                             /* The merge null message might span the entire chunk: scan for empty chunk to remove */
-                            if((result = H5O_remove_empty_chunks(f, dxpl_id, oh)) < 0)
+                            if((result = H5O_remove_empty_chunks(f, oh)) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPACK, FAIL, "can't remove empty chunk")
                             else if(result > 0)
                                 /* Get out of loop */
@@ -2060,7 +2059,7 @@ H5O_merge_null(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
 
                             /* If the merged message is too large, shrink the chunk */
                             if(curr_msg->raw_size >= H5O_MESG_MAX_SIZE)
-                                if(H5O_alloc_shrink_chunk(f, dxpl_id, oh, curr_msg->chunkno) < 0)
+                                if(H5O__alloc_shrink_chunk(f, oh, curr_msg->chunkno) < 0)
                                     HGOTO_ERROR(H5E_OHDR, H5E_CANTPACK, FAIL, "unable to shrink chunk")
 
                             /* Get out of loop */
@@ -2107,7 +2106,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_remove_empty_chunks(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
+H5O_remove_empty_chunks(H5F_t *f, H5O_t *oh)
 {
     hbool_t deleted_chunk;              /* Whether to a chunk was deleted */
     hbool_t did_deleting = FALSE;       /* Whether any chunks were deleted */
@@ -2143,7 +2142,7 @@ H5O_remove_empty_chunks(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                 for(v = 0, cont_msg = &oh->mesg[0]; v < oh->nmesgs; v++, cont_msg++) {
                     if(H5O_CONT_ID == cont_msg->type->id) {
                         /* Decode current continuation message if necessary */
-                        H5O_LOAD_NATIVE(f, dxpl_id, 0, oh, cont_msg, FAIL)
+                        H5O_LOAD_NATIVE(f, 0, oh, cont_msg, FAIL)
 
                         /* Check if the chunkno needs to be set */
                         /* (should only occur when the continuation message is first decoded) */
@@ -2174,7 +2173,7 @@ H5O_remove_empty_chunks(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                 deleted_chunkno = null_msg->chunkno;
 
                 /* Convert continuation message into a null message */
-                if(H5O_release_mesg(f, dxpl_id, oh, cont_msg, TRUE) < 0)
+                if(H5O_release_mesg(f, oh, cont_msg, TRUE) < 0)
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to convert into null message")
 
                 /*
@@ -2198,7 +2197,7 @@ H5O_remove_empty_chunks(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
 
                         /* If the entry is in the cache, update its chunk index */
                         if(chk_proxy_status & H5AC_ES__IN_CACHE) {
-                            if(H5O_chunk_update_idx(f, dxpl_id, oh, u) < 0)
+                            if(H5O__chunk_update_idx(f, oh, u) < 0)
                                 HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "unable to update index for chunk proxy")
                         } /* end if */
                     } /* end for */
@@ -2213,7 +2212,7 @@ H5O_remove_empty_chunks(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                  */
 
                 /* Release any information/memory for message */
-                H5O_msg_free_mesg(null_msg);
+                H5O__msg_free_mesg(null_msg);
 
                 /* Remove null message from list of messages */
                 if(null_msg_no < (oh->nmesgs - 1))
@@ -2235,7 +2234,7 @@ H5O_remove_empty_chunks(H5F_t *f, hid_t dxpl_id, H5O_t *oh)
                     /* Check for continuation message */
                     if(H5O_CONT_ID == curr_msg->type->id) {
                         /* Decode current continuation message if necessary */
-                        H5O_LOAD_NATIVE(f, dxpl_id, 0, oh, curr_msg, FAIL)
+                        H5O_LOAD_NATIVE(f, 0, oh, curr_msg, FAIL)
 
                         /* Check if the chunkno needs to be set */
                         /* (should only occur when the continuation message is first decoded) */
@@ -2289,15 +2288,10 @@ done:
  *		koziol@ncsa.uiuc.edu
  *		Oct  4 2005
  *
- * Modifications:
- *   Feb. 2009: Vailin Choi
- *      Add 2 more parameters to H5O_move_msgs_forward() for moving
- *	messages forward into "continuation" message
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_condense_header(H5F_t *f, H5O_t *oh, hid_t dxpl_id)
+H5O_condense_header(H5F_t *f, H5O_t *oh)
 {
     hbool_t rescan_header;              /* Whether to rescan header */
     htri_t result;                      /* Result from packing/merging/etc */
@@ -2314,21 +2308,21 @@ H5O_condense_header(H5F_t *f, H5O_t *oh, hid_t dxpl_id)
         rescan_header = FALSE;
 
         /* Scan for messages that can be moved earlier in chunks */
-        result = H5O_move_msgs_forward(f, dxpl_id, oh);
+        result = H5O_move_msgs_forward(f, oh);
         if(result < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTPACK, FAIL, "can't move header messages forward")
         if(result > 0)
             rescan_header = TRUE;
 
         /* Scan for adjacent null messages & merge them */
-        result = H5O_merge_null(f, dxpl_id, oh);
+        result = H5O_merge_null(f, oh);
         if(result < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTPACK, FAIL, "can't pack null header messages")
         if(result > 0)
             rescan_header = TRUE;
 
         /* Scan for empty chunks to remove */
-        result = H5O_remove_empty_chunks(f, dxpl_id, oh);
+        result = H5O_remove_empty_chunks(f, oh);
         if(result < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTPACK, FAIL, "can't remove empty chunk")
         if(result > 0)
@@ -2345,7 +2339,7 @@ done:
 
 /*-------------------------------------------------------------------------
  *
- * Function:    H5O_alloc_shrink_chunk
+ * Function:    H5O__alloc_shrink_chunk
  *
  * Purpose:     Shrinks a chunk, removing all null messages and any gap.
  *
@@ -2358,7 +2352,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno)
+H5O__alloc_shrink_chunk(H5F_t *f, H5O_t *oh, unsigned chunkno)
 {
     H5O_chunk_t *chunk = &oh->chunk[chunkno];   /* Chunk to shrink */
     H5O_chunk_proxy_t *chk_proxy = NULL;        /* Metadata cache proxy for chunk to shrink */
@@ -2376,14 +2370,14 @@ H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno)
     size_t      u;                              /* Index */
     herr_t      ret_value = SUCCEED;            /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
     HDassert(oh);
 
     /* Protect chunk */
-    if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, chunkno)))
+    if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, chunkno)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header chunk")
 
     /* Loop backwards to increase the chance of seeing more null messages at the
@@ -2417,7 +2411,7 @@ H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno)
             new_size -= shrink_size;
 
             /* Release any information/memory for the message */
-            H5O_msg_free_mesg(curr_msg);
+            H5O__msg_free_mesg(curr_msg);
 
             /* Remove the deleted null message from list of messages */
             if(u < (oh->nmesgs - 1))
@@ -2436,16 +2430,17 @@ H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno)
         oh->nmesgs++;
 
         /* Initialize new null message to make the chunk large enough */
-        oh->mesg[oh->nmesgs].type = H5O_MSG_NULL;
-        oh->mesg[oh->nmesgs].dirty = TRUE;
-        oh->mesg[oh->nmesgs].native = NULL;
-        oh->mesg[oh->nmesgs].raw = old_image + new_size + sizeof_msghdr - sizeof_chksum;
-        oh->mesg[oh->nmesgs].raw_size = MAX(H5O_ALIGN_OH(oh, min_chunk_size - total_msg_size),
+        curr_msg = &oh->mesg[oh->nmesgs - 1];
+        curr_msg->type = H5O_MSG_NULL;
+        curr_msg->dirty = TRUE;
+        curr_msg->native = NULL;
+        curr_msg->raw = old_image + new_size + sizeof_msghdr - sizeof_chksum;
+        curr_msg->raw_size = MAX(H5O_ALIGN_OH(oh, min_chunk_size - total_msg_size),
             sizeof_msghdr) - sizeof_msghdr;
-        oh->mesg[oh->nmesgs].chunkno = chunkno;
+        curr_msg->chunkno = chunkno;
 
         /* update the new chunk size */
-        new_size += oh->mesg[oh->nmesgs].raw_size + sizeof_msghdr;
+        new_size += curr_msg->raw_size + sizeof_msghdr;
     } /* end if */
 
     /* Check for changing the chunk #0 data size enough to need adjusting the flags */
@@ -2509,7 +2504,7 @@ H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno)
             H5O_chunk_proxy_t *cont_chk_proxy;        /* Chunk that message is in */
 
             /* Protect chunk */
-            if(NULL == (cont_chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, curr_msg->chunkno)))
+            if(NULL == (cont_chk_proxy = H5O__chunk_protect(f, oh, curr_msg->chunkno)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header chunk")
 
             /* Adjust size of continuation message */
@@ -2520,7 +2515,7 @@ H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno)
             curr_msg->dirty = TRUE;
 
             /* Release chunk, marking it dirty */
-            if(H5O_chunk_unprotect(f, dxpl_id, cont_chk_proxy, TRUE) < 0)
+            if(H5O__chunk_unprotect(f, cont_chk_proxy, TRUE) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
         } /* end if */
     } /* end for */
@@ -2532,14 +2527,14 @@ H5O_alloc_shrink_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned chunkno)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTRESIZE, FAIL, "unable to resize object header chunk")
 
     /* Free the unused space in the file */
-    if(H5MF_xfree(f, H5FD_MEM_OHDR, dxpl_id, chunk->addr + new_size, (hsize_t)(old_size - new_size)) < 0)
+    if(H5MF_xfree(f, H5FD_MEM_OHDR, chunk->addr + new_size, (hsize_t)(old_size - new_size)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to shrink object header chunk")
 
 done:
     /* Release chunk, marking it dirty */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, TRUE) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(f, chk_proxy, TRUE) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_alloc_shrink_chunk() */
+} /* H5O__alloc_shrink_chunk() */
 
diff --git a/src/H5Oattr.c b/src/H5Oattr.c
index 064c4cb..f2c31d7 100644
--- a/src/H5Oattr.c
+++ b/src/H5Oattr.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #define H5A_FRIEND		/*suppress error about including H5Apkg   */
@@ -27,23 +25,23 @@
 
 /* PRIVATE PROTOTYPES */
 static herr_t H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg);
-static void *H5O_attr_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O_attr_decode(H5F_t *f, H5O_t *open_oh,
+    unsigned mesg_flags, unsigned *ioflags, size_t p_size, const uint8_t *p);
 static void *H5O_attr_copy(const void *_mesg, void *_dest);
 static size_t H5O_attr_size(const H5F_t *f, const void *_mesg);
-static herr_t H5O_attr_free(void *mesg);
+static herr_t H5O__attr_free(void *mesg);
 static herr_t H5O_attr_pre_copy_file(H5F_t *file_src, const void *mesg_src,
     hbool_t *deleted, const H5O_copy_t *cpy_info, void *udata);
-static void *H5O_attr_copy_file(H5F_t *file_src, const H5O_msg_class_t *mesg_type,
+static void *H5O__attr_copy_file(H5F_t *file_src, const H5O_msg_class_t *mesg_type,
     void *native_src, H5F_t *file_dst, hbool_t *recompute_size,
-    H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-static herr_t H5O_attr_post_copy_file(const H5O_loc_t *src_oloc,
-    const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst, hid_t dxpl_id,
+    H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__attr_post_copy_file(const H5O_loc_t *src_oloc,
+    const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst, 
     H5O_copy_t *cpy_info);
 static herr_t H5O_attr_get_crt_index(const void *_mesg, H5O_msg_crt_idx_t *crt_idx);
 static herr_t H5O_attr_set_crt_index(void *_mesg, H5O_msg_crt_idx_t crt_idx);
-static herr_t H5O_attr_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-			      FILE * stream, int indent, int fwidth);
+static herr_t H5O__attr_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* Set up & include shared message "interface" info */
 #define H5O_SHARED_TYPE			H5O_MSG_ATTR
@@ -53,17 +51,17 @@ static herr_t H5O_attr_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
 #define H5O_SHARED_ENCODE_REAL		H5O_attr_encode
 #define H5O_SHARED_SIZE			H5O_attr_shared_size
 #define H5O_SHARED_SIZE_REAL		H5O_attr_size
-#define H5O_SHARED_DELETE		H5O_attr_shared_delete
-#define H5O_SHARED_DELETE_REAL		H5O_attr_delete
-#define H5O_SHARED_LINK			H5O_attr_shared_link
-#define H5O_SHARED_LINK_REAL		H5O_attr_link
-#define H5O_SHARED_COPY_FILE		H5O_attr_shared_copy_file
-#define H5O_SHARED_COPY_FILE_REAL	H5O_attr_copy_file
+#define H5O_SHARED_DELETE		H5O__attr_shared_delete
+#define H5O_SHARED_DELETE_REAL		H5O__attr_delete
+#define H5O_SHARED_LINK			H5O__attr_shared_link
+#define H5O_SHARED_LINK_REAL		H5O__attr_link
+#define H5O_SHARED_COPY_FILE		H5O__attr_shared_copy_file
+#define H5O_SHARED_COPY_FILE_REAL	H5O__attr_copy_file
 #define H5O_SHARED_POST_COPY_FILE	H5O_attr_shared_post_copy_file
-#define H5O_SHARED_POST_COPY_FILE_REAL	H5O_attr_post_copy_file
+#define H5O_SHARED_POST_COPY_FILE_REAL	H5O__attr_post_copy_file
 #undef  H5O_SHARED_POST_COPY_FILE_UPD
 #define H5O_SHARED_DEBUG		H5O_attr_shared_debug
-#define H5O_SHARED_DEBUG_REAL		H5O_attr_debug
+#define H5O_SHARED_DEBUG_REAL		H5O__attr_debug
 #include "H5Oshared.h"			/* Shared Object Header Message Callbacks */
 
 /* This message derives from H5O message class */
@@ -76,14 +74,14 @@ const H5O_msg_class_t H5O_MSG_ATTR[1] = {{
     H5O_attr_shared_encode,	/* encode message               */
     H5O_attr_copy,		/* copy the native value        */
     H5O_attr_shared_size,	/* size of raw message          */
-    H5O_attr_reset,	        /* reset method                 */
-    H5O_attr_free,	        /* free method			*/
-    H5O_attr_shared_delete,	/* file delete method		*/
-    H5O_attr_shared_link,	/* link method			*/
+    H5O__attr_reset,	        /* reset method                 */
+    H5O__attr_free,	        /* free method			*/
+    H5O__attr_shared_delete,	/* file delete method		*/
+    H5O__attr_shared_link,	/* link method			*/
     NULL,			/*set share method		*/
     NULL,		    	/*can share method		*/
     H5O_attr_pre_copy_file,	/* pre copy native value to file */
-    H5O_attr_shared_copy_file,	/* copy native value to file    */
+    H5O__attr_shared_copy_file,	/* copy native value to file    */
     H5O_attr_shared_post_copy_file,	/* post copy native value to file    */
     H5O_attr_get_crt_index,	/* get creation index		*/
     H5O_attr_set_crt_index,	/* set creation index		*/
@@ -109,9 +107,8 @@ H5FL_EXTERN(H5S_extent_t);
     Decode a attribute message and return a pointer to a memory struct
         with the decoded information
  USAGE
-    void *H5O_attr_decode(f, dxpl_id, mesg_flags, p)
+    void *H5O_attr_decode(f, mesg_flags, p)
         H5F_t *f;               IN: pointer to the HDF5 file struct
-        hid_t dxpl_id;          IN: DXPL for any I/O
         unsigned mesg_flags;    IN: Message flags to influence decoding
         const uint8_t *p;       IN: the raw information buffer
  RETURNS
@@ -122,8 +119,8 @@ H5FL_EXTERN(H5S_extent_t);
     function using malloc() and is returned to the caller.
 --------------------------------------------------------------------------*/
 static void *
-H5O_attr_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
-    unsigned *ioflags, const uint8_t *p)
+H5O_attr_decode(H5F_t *f, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
+    unsigned *ioflags, size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5A_t		*attr = NULL;
     H5S_extent_t	*extent;	/*extent dimensionality information  */
@@ -186,8 +183,8 @@ H5O_attr_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned H5_ATTR_UNUSED
         p += name_len;    /* advance the memory pointer */
 
     /* Decode the attribute's datatype */
-    if(NULL == (attr->shared->dt = (H5T_t *)(H5O_MSG_DTYPE->decode)(f, dxpl_id, open_oh,
-        ((flags & H5O_ATTR_FLAG_TYPE_SHARED) ? H5O_MSG_FLAG_SHARED : 0), ioflags, p)))
+    if(NULL == (attr->shared->dt = (H5T_t *)(H5O_MSG_DTYPE->decode)(f, open_oh,
+        ((flags & H5O_ATTR_FLAG_TYPE_SHARED) ? H5O_MSG_FLAG_SHARED : 0), ioflags, attr->shared->dt_size, p)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDECODE, NULL, "can't decode attribute datatype")
     if(attr->shared->version < H5O_ATTR_VERSION_2)
         p += H5O_ALIGN_OLD(attr->shared->dt_size);
@@ -201,8 +198,8 @@ H5O_attr_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned H5_ATTR_UNUSED
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Decode attribute's dataspace extent */
-    if((extent = (H5S_extent_t *)(H5O_MSG_SDSPACE->decode)(f, dxpl_id, open_oh,
-            ((flags & H5O_ATTR_FLAG_SPACE_SHARED) ? H5O_MSG_FLAG_SHARED : 0), ioflags, p)) == NULL)
+    if((extent = (H5S_extent_t *)(H5O_MSG_SDSPACE->decode)(f, open_oh,
+            ((flags & H5O_ATTR_FLAG_SPACE_SHARED) ? H5O_MSG_FLAG_SHARED : 0), ioflags, attr->shared->ds_size, p)) == NULL)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDECODE, NULL, "can't decode attribute dataspace")
 
     /* Copy the extent information to the dataspace */
@@ -253,7 +250,7 @@ done:
         if(attr) {
             if(attr->shared) {
                 /* Free any dynamicly allocated items */
-                if(H5A_free(attr) < 0)
+                if(H5A__free(attr) < 0)
                     HDONE_ERROR(H5E_ATTR, H5E_CANTRELEASE, NULL, "can't release attribute info")
 
                 /* Destroy shared attribute struct */
@@ -402,7 +399,7 @@ H5O_attr_copy(const void *_src, void *_dst)
     HDassert(_src);
 
     /* copy */
-    if(NULL == (ret_value = (H5A_t *)H5A_copy((H5A_t *)_dst, (const H5A_t *)_src)))
+    if(NULL == (ret_value = (H5A_t *)H5A__copy((H5A_t *)_dst, (const H5A_t *)_src)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "can't copy attribute")
 
 done:
@@ -472,7 +469,7 @@ H5O_attr_size(const H5F_t H5_ATTR_UNUSED *f, const void *_mesg)
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_attr_reset
+ * Function:    H5O__attr_reset
  *
  * Purpose:     Frees resources within a attribute message, but doesn't free
  *              the message itself.
@@ -482,28 +479,21 @@ H5O_attr_size(const H5F_t H5_ATTR_UNUSED *f, const void *_mesg)
  * Programmer:  Robb Matzke
  *              Tuesday, December  9, 1997
  *
- * Modification:Raymond Lu
- *              25 June 2008
- *              Made this function empty.  The freeing action is actually
- *              done in H5O_attr_free (see H5O_msg_free_real).  But this
- *              empty reset function needs to be here.  Otherwise, the
- *              caller function H5O_msg_reset_real will zero-set the whole
- *              message.
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_reset(void H5_ATTR_UNUSED *_mesg)
+H5O__attr_reset(void H5_ATTR_UNUSED *_mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_PACKAGE_NOERR
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_attr_reset() */
+} /* end H5O__attr_reset() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_free
+ * Function:	H5O__attr_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -513,25 +503,25 @@ H5O_attr_reset(void H5_ATTR_UNUSED *_mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_attr_free(void *mesg)
+H5O__attr_free(void *mesg)
 {
     H5A_t *attr = (H5A_t *)mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(mesg);
 
-    if(H5A_close(attr) < 0)
+    if(H5A__close(attr) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, FAIL, "unable to close attribute object")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_free() */
+} /* end H5O__attr_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_attr_delete
+ * Function:    H5O__attr_delete
  *
  * Purpose:     Free file space referenced by message
  *
@@ -543,7 +533,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, void *_mesg)
+H5O__attr_delete(H5F_t *f, H5O_t *oh, void *_mesg)
 {
     H5A_t *attr = (H5A_t *) _mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
@@ -555,20 +545,20 @@ H5O_attr_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, void *_mesg)
     HDassert(attr);
 
     /* Decrement reference count on datatype in file */
-    if((H5O_MSG_DTYPE->del)(f, dxpl_id, oh, attr->shared->dt) < 0)
+    if((H5O_MSG_DTYPE->del)(f, oh, attr->shared->dt) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust datatype link count")
 
     /* Decrement reference count on dataspace in file */
-    if((H5O_MSG_SDSPACE->del)(f, dxpl_id, oh, attr->shared->ds) < 0)
+    if((H5O_MSG_SDSPACE->del)(f, oh, attr->shared->ds) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust dataspace link count")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_delete() */
+} /* end H5O__attr_delete() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_attr_link
+ * Function:    H5O__attr_link
  *
  * Purpose:     Increment reference count on any objects referenced by
  *              message
@@ -581,12 +571,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_link(H5F_t *f, hid_t dxpl_id, H5O_t *oh, void *_mesg)
+H5O__attr_link(H5F_t *f, H5O_t *oh, void *_mesg)
 {
     H5A_t *attr = (H5A_t *) _mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -598,14 +588,14 @@ H5O_attr_link(H5F_t *f, hid_t dxpl_id, H5O_t *oh, void *_mesg)
      * message is deleted.
      */
     /* Increment reference count on datatype & dataspace in file */
-    if((H5O_MSG_DTYPE->link)(f, dxpl_id, oh, attr->shared->dt) < 0)
+    if((H5O_MSG_DTYPE->link)(f, oh, attr->shared->dt) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust datatype link count")
-    if((H5O_MSG_SDSPACE->link)(f, dxpl_id, oh, attr->shared->ds) < 0)
+    if((H5O_MSG_SDSPACE->link)(f, oh, attr->shared->ds) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust dataspace link count")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_link() */
+} /* end H5O__attr_link() */
 
 
 /*-------------------------------------------------------------------------
@@ -624,14 +614,23 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_attr_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSED *native_src,
+H5O_attr_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void *native_src,
     hbool_t *deleted, const H5O_copy_t *cpy_info, void H5_ATTR_UNUSED *udata)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    const H5A_t *attr_src = (const H5A_t *)native_src;  /* Source attribute */
+    herr_t ret_value = SUCCEED;                         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
 
     /* check args */
     HDassert(deleted);
     HDassert(cpy_info);
+    HDassert(cpy_info->file_dst);
+
+    /* Check to ensure that the version of the message to be copied does not exceed
+       the message version allowed by the destination file's high bound */
+    if(attr_src->shared->version > H5O_attr_ver_bounds[H5F_HIGH_BOUND(cpy_info->file_dst)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "attribute message version out of bounds")
 
     /* If we are not copying attributes into the destination file, indicate
      *  that this message should be deleted.
@@ -639,12 +638,13 @@ H5O_attr_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSED
     if(cpy_info->copy_without_attr)
         *deleted = TRUE;
 
-    FUNC_LEAVE_NOAPI(SUCCEED)
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O_attr_pre_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_attr_copy_file
+ * Function:    H5O__attr_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
  *
@@ -658,13 +658,13 @@ H5O_attr_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSED
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_attr_copy_file(H5F_t *file_src, const H5O_msg_class_t H5_ATTR_UNUSED *mesg_type,
+H5O__attr_copy_file(H5F_t *file_src, const H5O_msg_class_t H5_ATTR_UNUSED *mesg_type,
     void *native_src, H5F_t *file_dst, hbool_t *recompute_size,
-    H5O_copy_t *cpy_info, void H5_ATTR_UNUSED *udata, hid_t dxpl_id)
+    H5O_copy_t *cpy_info, void H5_ATTR_UNUSED *udata)
 {
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(native_src);
@@ -678,16 +678,16 @@ H5O_attr_copy_file(H5F_t *file_src, const H5O_msg_class_t H5_ATTR_UNUSED *mesg_t
     if(H5T_set_loc(((H5A_t *)native_src)->shared->dt, file_src, H5T_LOC_DISK) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, NULL, "invalid datatype location")
 
-    if(NULL == (ret_value = H5A_attr_copy_file((H5A_t *)native_src, file_dst, recompute_size, cpy_info,  dxpl_id)))
+    if(NULL == (ret_value = H5A__attr_copy_file((H5A_t *)native_src, file_dst, recompute_size, cpy_info)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, NULL, "can't copy attribute")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_attr_copy_file() */
+} /* H5O__attr_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_attr_post_copy_file
+ * Function:    H5O__attr_post_copy_file
  *
  * Purpose:     Finish copying a message from between files.
  *              We have to copy the values of a reference attribute in the
@@ -703,21 +703,19 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_attr_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
-    H5O_loc_t *dst_oloc, void *mesg_dst, hid_t dxpl_id, H5O_copy_t *cpy_info)
+H5O__attr_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
+    H5O_loc_t *dst_oloc, void *mesg_dst, H5O_copy_t *cpy_info)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
+    FUNC_ENTER_STATIC
 
-    FUNC_ENTER_NOAPI_NOINIT
-
-    if ( H5A_attr_post_copy_file(src_oloc, (const H5A_t *)mesg_src,
-         dst_oloc, (H5A_t *)mesg_dst, dxpl_id, cpy_info) < 0)
+    if(H5A__attr_post_copy_file(src_oloc, (const H5A_t *)mesg_src, dst_oloc, (H5A_t *)mesg_dst, cpy_info) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, FAIL, "can't copy attribute")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_attr_post_copy_file() */
+} /* H5O__attr_post_copy_file() */
 
 
 /*-------------------------------------------------------------------------
@@ -781,11 +779,11 @@ H5O_attr_set_crt_index(void *_mesg, H5O_msg_crt_idx_t crt_idx)
 
 /*--------------------------------------------------------------------------
  NAME
-    H5O_attr_debug
+    H5O__attr_debug
  PURPOSE
     Prints debugging information for an attribute message
  USAGE
-    void *H5O_attr_debug(f, mesg, stream, indent, fwidth)
+    void *H5O__attr_debug(f, mesg, stream, indent, fwidth)
         H5F_t *f;               IN: pointer to the HDF5 file struct
         const void *mesg;       IN: Pointer to the source attribute struct
         FILE *stream;           IN: Pointer to the stream for output data
@@ -798,15 +796,14 @@ H5O_attr_set_crt_index(void *_mesg, H5O_msg_crt_idx_t crt_idx)
     parameter.
 --------------------------------------------------------------------------*/
 static herr_t
-H5O_attr_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE * stream, int indent,
-	       int fwidth)
+H5O__attr_debug(H5F_t *f, const void *_mesg, FILE * stream, int indent, int fwidth)
 {
     const H5A_t *mesg = (const H5A_t *)_mesg;
     const char		*s;             /* Temporary string pointer */
     char		buf[128];       /* Temporary string buffer */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -870,17 +867,17 @@ H5O_attr_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE * stream, int in
     HDfprintf(stream, "%*s%-*s %lu\n", indent + 3, "", MAX(0,fwidth - 3),
 	    "Encoded Size:",
 	    (unsigned long)(mesg->shared->dt_size));
-    if((H5O_MSG_DTYPE->debug)(f, dxpl_id, mesg->shared->dt, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
+    if((H5O_MSG_DTYPE->debug)(f, mesg->shared->dt, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to display datatype message info")
 
     HDfprintf(stream, "%*sDataspace...\n", indent, "");
     HDfprintf(stream, "%*s%-*s %lu\n", indent + 3, "", MAX(0, fwidth - 3),
 	    "Encoded Size:",
 	    (unsigned long)(mesg->shared->ds_size));
-    if(H5S_debug(f, dxpl_id, mesg->shared->ds, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
+    if(H5S_debug(f, mesg->shared->ds, stream, indent + 3, MAX(0, fwidth - 3)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to display dataspace message info")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_debug() */
+} /* end H5O__attr_debug() */
 
diff --git a/src/H5Oattribute.c b/src/H5Oattribute.c
index 71f54eb..9d125e8 100644
--- a/src/H5Oattribute.c
+++ b/src/H5Oattribute.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -57,7 +55,6 @@
 /* User data for iteration when converting attributes to dense storage */
 typedef struct {
     H5F_t      *f;              /* Pointer to file for insertion */
-    hid_t dxpl_id;              /* DXPL during iteration */
     H5O_ainfo_t *ainfo;         /* Attribute info struct */
 } H5O_iter_cvt_t;
 
@@ -74,7 +71,6 @@ typedef struct {
 typedef struct {
     /* down */
     H5F_t *f;                   /* Pointer to file attribute is in */
-    hid_t dxpl_id;              /* DXPL for operation */
     H5A_t *attr;                /* Attribute data to update object header with */
 
     /* up */
@@ -85,7 +81,6 @@ typedef struct {
 typedef struct {
     /* down */
     H5F_t *f;                   /* Pointer to file attribute is in */
-    hid_t dxpl_id;              /* DXPL for operation */
     const char *old_name;       /* Old name of attribute */
     const char *new_name;       /* New name of attribute */
 
@@ -97,7 +92,6 @@ typedef struct {
 typedef struct {
     /* down */
     H5F_t *f;                   /* Pointer to file attribute is in */
-    hid_t dxpl_id;              /* DXPL for operation */
     hid_t loc_id;               /* ID of object being iterated over */
     unsigned skip;              /* # of attributes to skip over */
     H5A_operator_t op;          /* Callback routine for each attribute */
@@ -111,7 +105,6 @@ typedef struct {
 typedef struct {
     /* down */
     H5F_t *f;                   /* Pointer to file attribute is in */
-    hid_t dxpl_id;              /* DXPL for operation */
     const char *name;           /* Name of attribute to open */
 
     /* up */
@@ -188,12 +181,12 @@ H5O_attr_to_dense_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
     HDassert(attr);
 
     /* Insert attribute into dense storage */
-    if(H5A_dense_insert(udata->f, udata->dxpl_id, udata->ainfo, attr) < 0)
+    if(H5A__dense_insert(udata->f, udata->ainfo, attr) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to add to dense storage")
 
     /* Convert message into a null message in the header */
     /* (don't delete attribute's space in the file though) */
-    if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, FALSE) < 0)
+    if(H5O_release_mesg(udata->f, oh, mesg, FALSE) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to convert into null message")
 
     /* Indicate that the object header was modified */
@@ -205,7 +198,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_create
+ * Function:	H5O__attr_create
  *
  * Purpose:	Create a new attribute in the object header.
  *
@@ -217,7 +210,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
+H5O__attr_create(const H5O_loc_t *loc, H5A_t *attr)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     H5O_ainfo_t ainfo;                  /* Attribute information for object */
@@ -231,7 +224,7 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
     HDassert(attr);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Check if this object already has attribute information */
@@ -240,7 +233,7 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
         htri_t ainfo_exists;            /* Whether the attribute info was retrieved */
 
         /* Check for (& retrieve if available) attribute info */
-        if((ainfo_exists = H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo)) < 0)
+        if((ainfo_exists = H5A__get_ainfo(loc->file, oh, &ainfo)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
         if(!ainfo_exists) {
             /* Initialize attribute information */
@@ -268,7 +261,7 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
             size_t raw_size = 0;    /* Raw size of message */
 
             /* Check for attribute being sharable */
-            if((sharable = H5SM_can_share(loc->file, dxpl_id, NULL, NULL, H5O_ATTR_ID, attr)) < 0)
+            if((sharable = H5SM_can_share(loc->file, NULL, NULL, H5O_ATTR_ID, attr)) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_BADMESG, FAIL, "can't determine attribute sharing status")
             else if(sharable == FALSE) {
                 /* Compute the size needed to encode the attribute */
@@ -281,18 +274,17 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
                 H5O_mesg_operator_t op;         /* Wrapper for operator */
 
                 /* Create dense storage for attributes */
-                if(H5A_dense_create(loc->file, dxpl_id, &ainfo) < 0)
+                if(H5A__dense_create(loc->file, &ainfo) < 0)
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to create dense storage for attributes")
 
                 /* Set up user data for callback */
                 udata.f = loc->file;
-                udata.dxpl_id = dxpl_id;
                 udata.ainfo = &ainfo;
 
                 /* Iterate over existing attributes, moving them to dense storage */
                 op.op_type = H5O_MESG_OP_LIB;
                 op.u.lib_op = H5O_attr_to_dense_cb;
-                if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+                if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTCONVERT, FAIL, "error converting attributes to dense storage")
             } /* end if */
         } /* end if */
@@ -315,14 +307,13 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
 
         /* Add the attribute information message, if one is needed */
         if(new_ainfo) {
-            if(H5O_msg_append_real(loc->file, dxpl_id, oh, H5O_MSG_AINFO, H5O_MSG_FLAG_DONTSHARE, 0, &ainfo) < 0)
+            if(H5O__msg_append_real(loc->file, oh, H5O_MSG_AINFO, H5O_MSG_FLAG_DONTSHARE, 0, &ainfo) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create new attribute info message")
         } /* end if */
         /* Otherwise, update existing message */
-        else {
-            if(H5O_msg_write_real(loc->file, dxpl_id, oh, H5O_MSG_AINFO, H5O_MSG_FLAG_DONTSHARE, 0, &ainfo) < 0)
+        else
+            if(H5O__msg_write_real(loc->file, oh, H5O_MSG_AINFO, H5O_MSG_FLAG_DONTSHARE, 0, &ainfo) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update attribute info message")
-        } /* end else */
     } /* end if */
     else {
         /* Set "bogus" creation index for attribute */
@@ -335,19 +326,18 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
     /* Check for storing attribute with dense storage */
     if(H5F_addr_defined(ainfo.fheap_addr)) {
         /* Insert attribute into dense storage */
-        if(H5A_dense_insert(loc->file, dxpl_id, &ainfo, attr) < 0)
+        if(H5A__dense_insert(loc->file, &ainfo, attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to add to dense storage")
     } /* end if */
-    else {
+    else
         /* Append new message to object header */
-        if(H5O_msg_append_real(loc->file, dxpl_id, oh, H5O_MSG_ATTR, 0, 0, attr) < 0)
+        if(H5O__msg_append_real(loc->file, oh, H5O_MSG_ATTR, 0, 0, attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create new attribute in header")
-    } /* end else */
 
     /* Increment reference count for shared attribute object for the
-     * object handle created by the caller function H5A_create.  The count
+     * object handle created by the caller function H5A__create.  The count
      * for the cached object header has been incremented in the step above
-     * (in H5O_msg_append_real).  The dense storage doesn't need a count. */
+     * (in H5O__msg_append_real).  The dense storage doesn't need a count. */
     attr->shared->nrefs += 1;
 
     /* Was new attribute shared? */
@@ -355,7 +345,7 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
         hsize_t attr_rc;                /* Attribute's ref count in shared message storage */
 
         /* Retrieve ref count for shared attribute */
-        if(H5SM_get_refcount(loc->file, dxpl_id, H5O_ATTR_ID, &attr->sh_loc, &attr_rc) < 0)
+        if(H5SM_get_refcount(loc->file, H5O_ATTR_ID, &attr->sh_loc, &attr_rc) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve shared message ref count")
 
         /* If this is not the first copy of the attribute in the shared message
@@ -382,7 +372,7 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
          *      *ick* -QAK, 2007/01/08
          */
         if(attr_rc > 1) {
-            if(H5O_attr_delete(loc->file, dxpl_id, oh, attr) < 0)
+            if(H5O__attr_delete(loc->file, oh, attr) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute")
         } /* end if */
     } /* end if */
@@ -390,7 +380,7 @@ H5O_attr_create(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
 	HGOTO_ERROR(H5E_ATTR, H5E_WRITEERROR, FAIL, "error determining if message should be shared")
 
     /* Update the modification time, if any */
-    if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE) < 0)
+    if(H5O_touch_oh(loc->file, oh, FALSE) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
 
 done:
@@ -398,7 +388,7 @@ done:
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_create() */
+} /* end H5O__attr_create() */
 
 
 /*-------------------------------------------------------------------------
@@ -432,7 +422,7 @@ H5O_attr_open_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned sequence,
     /* Check for correct attribute message to modify */
     if(HDstrcmp(((H5A_t *)mesg->native)->shared->name, udata->name) == 0) {
         /* Make a copy of the attribute to return */
-        if(NULL == (udata->attr = H5A_copy(NULL, (H5A_t *)mesg->native)))
+        if(NULL == (udata->attr = H5A__copy(NULL, (H5A_t *)mesg->native)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy attribute")
 
         /* Assign [somewhat arbitrary] creation order value, for older versions
@@ -451,7 +441,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_open_by_name
+ * Function:	H5O__attr_open_by_name
  *
  * Purpose:	Open an existing attribute in an object header.
  *
@@ -460,15 +450,10 @@ done:
  * Programmer:	Quincey Koziol
  *		Monday, December 11, 2006
  *
- * Modification:Raymond Lu
- *              23 June 2008
- *              If the attribute is in dense storage and has already been
- *              opened, make a copy of already opened object to share some
- *              object information.
  *-------------------------------------------------------------------------
  */
 H5A_t *
-H5O_attr_open_by_name(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
+H5O__attr_open_by_name(const H5O_loc_t *loc, const char *name)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     H5O_ainfo_t ainfo;                  /* Attribute information for object */
@@ -477,21 +462,21 @@ H5O_attr_open_by_name(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
     htri_t found_open_attr = FALSE;     /* Whether opened object is found */
     H5A_t *ret_value = NULL;            /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, NULL)
+    FUNC_ENTER_PACKAGE_TAG(loc->addr)
 
     /* Check arguments */
     HDassert(loc);
     HDassert(name);
 
     /* Protect the object header to iterate over */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPROTECT, NULL, "unable to load object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, NULL, "can't check for attribute info message")
     } /* end if */
 
@@ -501,14 +486,14 @@ H5O_attr_open_by_name(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
     if((found_open_attr = H5O_attr_find_opened_attr(loc, &exist_attr, name)) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, NULL, "failed in finding opened attribute")
     else if(found_open_attr == TRUE) {
-        if(NULL == (opened_attr = H5A_copy(NULL, exist_attr)))
+        if(NULL == (opened_attr = H5A__copy(NULL, exist_attr)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, NULL, "can't copy existing attribute")
     } /* end else if */
     else {
         /* Check for attributes in dense storage */
         if(H5F_addr_defined(ainfo.fheap_addr)) {
             /* Open attribute with dense storage */
-            if(NULL == (opened_attr = H5A_dense_open(loc->file, dxpl_id, &ainfo, name)))
+            if(NULL == (opened_attr = H5A__dense_open(loc->file, &ainfo, name)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "can't open attribute")
         } /* end if */
         else {
@@ -522,7 +507,7 @@ H5O_attr_open_by_name(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
             /* Iterate over attributes, to locate correct one to open */
             op.op_type = H5O_MESG_OP_LIB;
             op.u.lib_op = H5O_attr_open_cb;
-            if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+            if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, NULL, "error updating attribute")
 
             /* Check that we found the attribute */
@@ -543,16 +528,16 @@ H5O_attr_open_by_name(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
     ret_value = opened_attr;
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
 
     /* Release any resources, on error */
     if(NULL == ret_value && opened_attr)
-        if(H5A_close(opened_attr) < 0)
+        if(H5A__close(opened_attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, NULL, "can't close attribute")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* end H5O_attr_open_by_name() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__attr_open_by_name() */
 
 
 /*-------------------------------------------------------------------------
@@ -582,7 +567,7 @@ H5O_attr_open_by_idx_cb(const H5A_t *attr, void *_ret_attr)
     HDassert(ret_attr);
 
     /* Copy attribute information.  Shared some attribute information. */
-    if(NULL == (*ret_attr = H5A_copy(NULL, attr)))
+    if(NULL == (*ret_attr = H5A__copy(NULL, attr)))
         HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, H5_ITER_ERROR, "can't copy attribute")
 
 done:
@@ -591,7 +576,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_open_by_idx
+ * Function:	H5O__attr_open_by_idx
  *
  * Purpose:	Open an existing attribute in an object header according to
  *              an index.
@@ -601,25 +586,19 @@ done:
  * Programmer:	Quincey Koziol
  *		Monday, December 18, 2006
  *
- * Modification:Raymond Lu
- *              23 June 2008
- *              After opening the attribute, check whether it's in dense
- *              storage and has already been opened.  If it has, close the
- *              opened object and make a copy of already opened object.
  *-------------------------------------------------------------------------
  */
 H5A_t *
-H5O_attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, hid_t dxpl_id)
+H5O__attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n)
 {
-    H5O_t *oh = NULL;                   /* Object header */
     H5A_attr_iter_op_t attr_op;         /* Attribute operator */
     H5A_t *exist_attr = NULL;           /* Existing opened attribute object */
     H5A_t *opened_attr = NULL;          /* Newly opened attribute object */
     htri_t found_open_attr = FALSE;     /* Whether opened object is found */
     H5A_t *ret_value = NULL;            /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     HDassert(loc);
@@ -629,13 +608,9 @@ H5O_attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
     attr_op.u.lib_op = H5O_attr_open_by_idx_cb;
 
     /* Iterate over attributes to locate correct one */
-    if(H5O_attr_iterate_real((hid_t)-1, loc, dxpl_id, idx_type, order, n, NULL, &attr_op, &opened_attr) < 0)
+    if(H5O_attr_iterate_real((hid_t)-1, loc, idx_type, order, n, NULL, &attr_op, &opened_attr) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_BADITER, NULL, "can't locate attribute")
 
-    /* Protect the object header to iterate over */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
-	HGOTO_ERROR(H5E_ATTR, H5E_CANTPROTECT, NULL, "unable to load object header")
-
     /* Find out whether it has already been opened.  If it has, close the object
      * and make a copy of the already opened object to share the object info.
      */
@@ -647,9 +622,9 @@ H5O_attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
          * and close the object just opened.
          */
         if(found_open_attr && exist_attr) {
-            if(H5A_close(opened_attr) < 0)
+            if(H5A__close(opened_attr) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, NULL, "can't close attribute")
-            if(NULL == (opened_attr = H5A_copy(NULL, exist_attr)))
+            if(NULL == (opened_attr = H5A__copy(NULL, exist_attr)))
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTCOPY, NULL, "can't copy existing attribute")
         } else {
             /* Mark datatype as being on disk now */
@@ -662,16 +637,13 @@ H5O_attr_open_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
     ret_value = opened_attr;
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
-	HDONE_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
-
     /* Release any resources, on error */
     if(NULL == ret_value && opened_attr)
-        if(H5A_close(opened_attr) < 0)
+        if(H5A__close(opened_attr) < 0)
             HDONE_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, NULL, "can't close attribute")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_open_by_idx() */
+} /* end H5O__attr_open_by_idx() */
 
 
 /*-------------------------------------------------------------------------
@@ -756,7 +728,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_update_shared
+ * Function:	H5O__attr_update_shared
  *
  * Purpose:	Update a shared attribute.
  *
@@ -769,15 +741,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_update_shared(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5A_t *attr,
-    H5O_shared_t *update_sh_mesg)
+H5O__attr_update_shared(H5F_t *f, H5O_t *oh, H5A_t *attr, H5O_shared_t *update_sh_mesg)
 {
     H5O_shared_t sh_mesg;               /* Shared object header message */
     hsize_t attr_rc;                    /* Attribute's ref count in shared message storage */
     htri_t shared_mesg;                 /* Whether the message should be shared */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -793,13 +764,13 @@ H5O_attr_update_shared(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5A_t *attr,
 
     /* Store new version of message as a SOHM */
     /* (should always work, since we're not changing the size of the attribute) */
-    if((shared_mesg = H5SM_try_share(f, dxpl_id, oh, 0, H5O_ATTR_ID, attr, NULL)) == 0)
+    if((shared_mesg = H5SM_try_share(f, oh, 0, H5O_ATTR_ID, attr, NULL)) == 0)
         HGOTO_ERROR(H5E_ATTR, H5E_BADMESG, FAIL, "attribute changed sharing status")
     else if(shared_mesg < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_BADMESG, FAIL, "can't share attribute")
 
     /* Retrieve shared message storage ref count for new shared attribute */
-    if(H5SM_get_refcount(f, dxpl_id, H5O_ATTR_ID, &attr->sh_loc, &attr_rc) < 0)
+    if(H5SM_get_refcount(f, H5O_ATTR_ID, &attr->sh_loc, &attr_rc) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve shared message ref count")
 
     /* If the newly shared attribute needs to share "ownership" of the shared
@@ -811,14 +782,13 @@ H5O_attr_update_shared(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5A_t *attr,
      *
      *      *ick* -QAK, 2007/01/08
      */
-    if(attr_rc == 1) {
+    if(attr_rc == 1)
         /* Increment reference count on attribute components */
-        if(H5O_attr_link(f, dxpl_id, oh, attr) < 0)
+        if(H5O__attr_link(f, oh, attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust attribute link count")
-    } /* end if */
 
     /* Remove the old attribute from the SOHM storage */
-    if(H5SM_delete(f, dxpl_id, oh, &sh_mesg) < 0)
+    if(H5SM_delete(f, oh, &sh_mesg) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to delete shared attribute in shared storage")
 
     /* Extract updated shared message info from modified attribute, if requested */
@@ -828,7 +798,7 @@ H5O_attr_update_shared(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5A_t *attr,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_update_shared() */
+} /* end H5O__attr_update_shared() */
 
 
 /*-------------------------------------------------------------------------
@@ -868,7 +838,7 @@ H5O_attr_write_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
     /* Check for correct attribute message to modify */
     if(0 == HDstrcmp(((H5A_t *)mesg->native)->shared->name, udata->attr->shared->name)) {
         /* Protect chunk */
-        if(NULL == (chk_proxy = H5O_chunk_protect(udata->f, udata->dxpl_id, oh, mesg->chunkno)))
+        if(NULL == (chk_proxy = H5O__chunk_protect(udata->f, oh, mesg->chunkno)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTPROTECT, H5_ITER_ERROR, "unable to load object header chunk")
 
         /* Because the attribute structure is shared now. The only situation that requires
@@ -890,13 +860,13 @@ H5O_attr_write_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
         chk_dirtied = TRUE;
 
         /* Release chunk */
-        if(H5O_chunk_unprotect(udata->f, udata->dxpl_id, chk_proxy, chk_dirtied) < 0)
+        if(H5O__chunk_unprotect(udata->f, chk_proxy, chk_dirtied) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, H5_ITER_ERROR, "unable to unprotect object header chunk")
         chk_proxy = NULL;
 
         /* Update the shared attribute in the SOHM storage */
         if(mesg->flags & H5O_MSG_FLAG_SHARED)
-            if(H5O_attr_update_shared(udata->f, udata->dxpl_id, oh, udata->attr, (H5O_shared_t *)mesg->native) < 0)
+            if(H5O__attr_update_shared(udata->f, oh, udata->attr, (H5O_shared_t *)mesg->native) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, H5_ITER_ERROR, "unable to update attribute in shared storage")
 
         /* Indicate that the object header was modified */
@@ -911,7 +881,7 @@ H5O_attr_write_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
 
 done:
     /* Release chunk, if not already done */
-    if(chk_proxy && H5O_chunk_unprotect(udata->f, udata->dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(udata->f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, H5_ITER_ERROR, "unable to unprotect object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -919,7 +889,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_write
+ * Function:	H5O__attr_write
  *
  * Purpose:	Write a new value to an attribute.
  *
@@ -931,34 +901,34 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_write(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
+H5O__attr_write(const H5O_loc_t *loc, H5A_t *attr)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     H5O_ainfo_t ainfo;                  /* Attribute information for object */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     HDassert(loc);
     HDassert(attr);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
     /* Check for attributes stored densely */
     if(H5F_addr_defined(ainfo.fheap_addr)) {
         /* Modify the attribute data in dense storage */
-        if(H5A_dense_write(loc->file, dxpl_id, &ainfo, attr) < 0)
+        if(H5A__dense_write(loc->file, &ainfo, attr) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute")
     } /* end if */
     else {
@@ -967,14 +937,13 @@ H5O_attr_write(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
 
         /* Set up user data for callback */
         udata.f = loc->file;
-        udata.dxpl_id = dxpl_id;
         udata.attr = attr;
         udata.found = FALSE;
 
         /* Iterate over attributes, to locate correct one to update */
         op.op_type = H5O_MESG_OP_LIB;
         op.u.lib_op = H5O_attr_write_cb;
-        if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+        if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute")
 
         /* Check that we found the attribute */
@@ -983,7 +952,7 @@ H5O_attr_write(const H5O_loc_t *loc, hid_t dxpl_id, H5A_t *attr)
     } /* end else */
 
     /* Update the modification time, if any */
-    if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE) < 0)
+    if(H5O_touch_oh(loc->file, oh, FALSE) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
 
 done:
@@ -991,7 +960,7 @@ done:
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_write */
+} /* end H5O__attr_write */
 
 
 /*-------------------------------------------------------------------------
@@ -1075,7 +1044,7 @@ H5O_attr_rename_mod_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
         unsigned old_version = ((H5A_t *)mesg->native)->shared->version;        /* Old version of the attribute */
 
         /* Protect chunk */
-        if(NULL == (chk_proxy = H5O_chunk_protect(udata->f, udata->dxpl_id, oh, mesg->chunkno)))
+        if(NULL == (chk_proxy = H5O__chunk_protect(udata->f, oh, mesg->chunkno)))
             HGOTO_ERROR(H5E_ATTR, H5E_CANTPROTECT, H5_ITER_ERROR, "unable to load object header chunk")
 
         /* Change the name for the attribute */
@@ -1083,7 +1052,7 @@ H5O_attr_rename_mod_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
         ((H5A_t *)mesg->native)->shared->name = H5MM_xstrdup(udata->new_name);
 
         /* Recompute the version to encode the attribute with */
-        if(H5A_set_version(udata->f, ((H5A_t *)mesg->native)) < 0)
+        if(H5A__set_version(udata->f, ((H5A_t *)mesg->native)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTSET, H5_ITER_ERROR, "unable to update attribute version")
 
         /* Mark the message as modified */
@@ -1091,14 +1060,14 @@ H5O_attr_rename_mod_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
         chk_dirtied = TRUE;
 
         /* Release chunk */
-        if(H5O_chunk_unprotect(udata->f, udata->dxpl_id, chk_proxy, chk_dirtied) < 0)
+        if(H5O__chunk_unprotect(udata->f, chk_proxy, chk_dirtied) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, H5_ITER_ERROR, "unable to unprotect object header chunk")
         chk_proxy = NULL;
 
         /* Check for shared message */
         if(mesg->flags & H5O_MSG_FLAG_SHARED) {
             /* Update the shared attribute in the SOHM storage */
-            if(H5O_attr_update_shared(udata->f, udata->dxpl_id, oh, (H5A_t *)mesg->native, NULL) < 0)
+            if(H5O__attr_update_shared(udata->f, oh, (H5A_t *)mesg->native, NULL) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, H5_ITER_ERROR, "unable to update attribute in shared storage")
         } /* end if */
         else {
@@ -1127,21 +1096,21 @@ H5O_attr_rename_mod_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
                 /* (doesn't decrement the link count on shared components becuase
                  *      the "native" pointer has been reset)
                  */
-                if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, FALSE) < 0)
+                if(H5O_release_mesg(udata->f, oh, mesg, FALSE) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to release previous attribute")
 
 		*oh_modified = H5O_MODIFY_CONDENSE;
 
                 /* Append renamed attribute to object header */
                 /* (Don't let it become shared) */
-                if(H5O_msg_append_real(udata->f, udata->dxpl_id, oh, H5O_MSG_ATTR, (mesg->flags | H5O_MSG_FLAG_DONTSHARE), 0, attr) < 0)
+                if(H5O__msg_append_real(udata->f, oh, H5O_MSG_ATTR, (mesg->flags | H5O_MSG_FLAG_DONTSHARE), 0, attr) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to relocate renamed attribute in header")
 
                 /* Sanity check */
                 HDassert(H5O_msg_is_shared(H5O_ATTR_ID, attr) == FALSE);
 
                 /* Close the local copy of the attribute */
-                H5A_close(attr);
+                H5A__close(attr);
             } /* end if */
         } /* end else */
 
@@ -1157,7 +1126,7 @@ H5O_attr_rename_mod_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
 
 done:
     /* Release chunk, if not already done */
-    if(chk_proxy && H5O_chunk_unprotect(udata->f, udata->dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(udata->f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, H5_ITER_ERROR, "unable to unprotect object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1165,7 +1134,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_rename
+ * Function:	H5O__attr_rename
  *
  * Purpose:	Rename an attribute.
  *
@@ -1177,14 +1146,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id, const char *old_name,
+H5O__attr_rename(const H5O_loc_t *loc, const char *old_name,
     const char *new_name)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     H5O_ainfo_t ainfo;                  /* Attribute information for object */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(loc->addr)
 
     /* Check arguments */
     HDassert(loc);
@@ -1192,21 +1161,21 @@ H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id, const char *old_name,
     HDassert(new_name);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
     /* Check for attributes stored densely */
     if(H5F_addr_defined(ainfo.fheap_addr)) {
         /* Rename the attribute data in dense storage */
-        if(H5A_dense_rename(loc->file, dxpl_id, &ainfo, old_name, new_name) < 0)
+        if(H5A__dense_rename(loc->file, &ainfo, old_name, new_name) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute")
     } /* end if */
     else {
@@ -1215,7 +1184,6 @@ H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id, const char *old_name,
 
         /* Set up user data for callback */
         udata.f = loc->file;
-        udata.dxpl_id = dxpl_id;
         udata.old_name = old_name;
         udata.new_name = new_name;
         udata.found = FALSE;
@@ -1223,7 +1191,7 @@ H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id, const char *old_name,
         /* Iterate over attributes, to check if "new name" exists already */
         op.op_type = H5O_MESG_OP_LIB;
         op.u.lib_op = H5O_attr_rename_chk_cb;
-        if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+        if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute")
 
         /* If the new name was found, indicate an error */
@@ -1233,7 +1201,7 @@ H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id, const char *old_name,
         /* Iterate over attributes again, to actually rename attribute with old name */
         op.op_type = H5O_MESG_OP_LIB;
         op.u.lib_op = H5O_attr_rename_mod_cb;
-        if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+        if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "error updating attribute")
 
         /* Check that we found the attribute to rename */
@@ -1242,15 +1210,15 @@ H5O_attr_rename(const H5O_loc_t *loc, hid_t dxpl_id, const char *old_name,
     } /* end else */
 
     /* Update the modification time, if any */
-    if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE) < 0)
+    if(H5O_touch_oh(loc->file, oh, FALSE) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
 
 done:
     if(oh && H5O_unpin(oh) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_attr_rename */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__attr_rename */
 
 
 /*-------------------------------------------------------------------------
@@ -1266,16 +1234,16 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_iterate_real(hid_t loc_id, const H5O_loc_t *loc, hid_t dxpl_id,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t skip,
-    hsize_t *last_attr, const H5A_attr_iter_op_t *attr_op, void *op_data)
+H5O_attr_iterate_real(hid_t loc_id, const H5O_loc_t *loc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t skip, hsize_t *last_attr,
+    const H5A_attr_iter_op_t *attr_op, void *op_data)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     H5O_ainfo_t ainfo;                  /* Attribute information for object */
     H5A_attr_table_t atable = {0, NULL};        /* Table of attributes */
     herr_t ret_value = FAIL;            /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, FAIL)
+    FUNC_ENTER_NOAPI_NOINIT_TAG(loc->addr)
 
     /* Check arguments */
     HDassert(loc);
@@ -1284,14 +1252,14 @@ H5O_attr_iterate_real(hid_t loc_id, const H5O_loc_t *loc, hid_t dxpl_id,
     HDassert(attr_op);
 
     /* Protect the object header to iterate over */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
@@ -1302,21 +1270,21 @@ H5O_attr_iterate_real(hid_t loc_id, const H5O_loc_t *loc, hid_t dxpl_id,
             HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified")
 
         /* Release the object header */
-        if(H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        if(H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
         oh = NULL;
 
         /* Iterate over attributes in dense storage */
-        if((ret_value = H5A_dense_iterate(loc->file, dxpl_id, loc_id, &ainfo, idx_type, order, skip, last_attr, attr_op, op_data)) < 0)
+        if((ret_value = H5A__dense_iterate(loc->file, loc_id, &ainfo, idx_type, order, skip, last_attr, attr_op, op_data)) < 0)
             HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
     } /* end if */
     else {
         /* Build table of attributes for compact storage */
-        if(H5A_compact_build_table(loc->file, dxpl_id, oh, idx_type, order, &atable) < 0)
+        if(H5A__compact_build_table(loc->file, oh, idx_type, order, &atable) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")
 
         /* Release the object header */
-        if(H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        if(H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
         oh = NULL;
 
@@ -1325,23 +1293,23 @@ H5O_attr_iterate_real(hid_t loc_id, const H5O_loc_t *loc, hid_t dxpl_id,
             HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid index specified")
 
         /* Iterate over attributes in table */
-        if((ret_value = H5A_attr_iterate_table(&atable, skip, last_attr, loc_id, attr_op, op_data)) < 0)
+        if((ret_value = H5A__attr_iterate_table(&atable, skip, last_attr, loc_id, attr_op, op_data)) < 0)
             HERROR(H5E_ATTR, H5E_CANTNEXT, "iteration operator failed");
     } /* end else */
 
 done:
     /* Release resources */
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
-    if(atable.attrs && H5A_attr_release_table(&atable) < 0)
+    if(atable.attrs && H5A__attr_release_table(&atable) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5O_attr_iterate_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_iterate
+ * Function:	H5O__attr_iterate
  *
  * Purpose:	Iterate over attributes for an object.
  *
@@ -1353,14 +1321,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_iterate(hid_t loc_id, hid_t dxpl_id,
-    H5_index_t idx_type, H5_iter_order_t order, hsize_t skip,
-    hsize_t *last_attr, const H5A_attr_iter_op_t *attr_op, void *op_data)
+H5O__attr_iterate(hid_t loc_id, H5_index_t idx_type, H5_iter_order_t order,
+    hsize_t skip, hsize_t *last_attr, const H5A_attr_iter_op_t *attr_op,
+    void *op_data)
 {
     H5G_loc_t loc;	        /* Object location */
     herr_t ret_value = FAIL;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     HDassert(attr_op);
@@ -1370,12 +1338,12 @@ H5O_attr_iterate(hid_t loc_id, hid_t dxpl_id,
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
 
     /* Iterate over attributes to locate correct one */
-    if((ret_value = H5O_attr_iterate_real(loc_id, loc.oloc, dxpl_id, idx_type, order, skip, last_attr, attr_op, op_data)) < 0)
+    if((ret_value = H5O_attr_iterate_real(loc_id, loc.oloc, idx_type, order, skip, last_attr, attr_op, op_data)) < 0)
         HERROR(H5E_ATTR, H5E_BADITER, "error iterating over attributes");
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_iterate() */
+} /* end H5O__attr_iterate() */
 
 
 /*-------------------------------------------------------------------------
@@ -1399,8 +1367,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_attr_remove_update(const H5O_loc_t *loc, H5O_t *oh, H5O_ainfo_t *ainfo,
-    hid_t dxpl_id)
+H5O_attr_remove_update(const H5O_loc_t *loc, H5O_t *oh, H5O_ainfo_t *ainfo)
 {
     H5A_attr_table_t atable = {0, NULL};        /* Table of attributes */
     herr_t ret_value = SUCCEED;                 /* Return value */
@@ -1421,7 +1388,7 @@ H5O_attr_remove_update(const H5O_loc_t *loc, H5O_t *oh, H5O_ainfo_t *ainfo,
         size_t u;                       /* Local index */
 
         /* Build the table of attributes for this object */
-        if(H5A_dense_build_table(loc->file, dxpl_id, ainfo, H5_INDEX_NAME, H5_ITER_NATIVE, &atable) < 0)
+        if(H5A__dense_build_table(loc->file, ainfo, H5_INDEX_NAME, H5_ITER_NATIVE, &atable) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")
 
         /* Inspect attributes in table for ones that can't be converted back
@@ -1449,7 +1416,7 @@ H5O_attr_remove_update(const H5O_loc_t *loc, H5O_t *oh, H5O_ainfo_t *ainfo,
                 else if(shared_mesg == 0) {
                     /* Increment reference count on attribute components */
                     /* (so that they aren't deleted when the dense attribute storage is deleted) */
-                    if(H5O_attr_link(loc->file, dxpl_id, oh, (atable.attrs[u])) < 0)
+                    if(H5O__attr_link(loc->file, oh, (atable.attrs[u])) < 0)
                         HGOTO_ERROR(H5E_ATTR, H5E_LINKCOUNT, FAIL, "unable to adjust attribute link count")
                 } /* end if */
                 else {
@@ -1466,17 +1433,17 @@ H5O_attr_remove_update(const H5O_loc_t *loc, H5O_t *oh, H5O_ainfo_t *ainfo,
                 /* If found the attribute is already opened, use the opened message to insert.
                    If not, still use the message in the attribute table. */
                 if(found_open_attr && exist_attr) {
-                    if(H5O_msg_append_real(loc->file, dxpl_id, oh, H5O_MSG_ATTR, 0, 0, exist_attr) < 0)
+                    if(H5O__msg_append_real(loc->file, oh, H5O_MSG_ATTR, 0, 0, exist_attr) < 0)
                         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "can't create message")
 
-                } else {
-                    if(H5O_msg_append_real(loc->file, dxpl_id, oh, H5O_MSG_ATTR, 0, 0, (atable.attrs[u])) < 0)
+                } /* end if */
+                else
+                    if(H5O__msg_append_real(loc->file, oh, H5O_MSG_ATTR, 0, 0, (atable.attrs[u])) < 0)
                         HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "can't create message")
-                }
             } /* end for */
 
             /* Remove the dense storage */
-            if(H5A_dense_delete(loc->file, dxpl_id, ainfo) < 0)
+            if(H5A__dense_delete(loc->file, ainfo) < 0)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete dense attribute storage")
         } /* end if */
     } /* end if */
@@ -1485,17 +1452,16 @@ H5O_attr_remove_update(const H5O_loc_t *loc, H5O_t *oh, H5O_ainfo_t *ainfo,
      *  message should be deleted itself.
      */
     if(ainfo->nattrs == 0) {
-        if(H5O_msg_remove_real(loc->file, oh, H5O_MSG_AINFO, H5O_ALL, NULL, NULL, TRUE, dxpl_id) < 0)
+        if(H5O__msg_remove_real(loc->file, oh, H5O_MSG_AINFO, H5O_ALL, NULL, NULL, TRUE) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute info")
     } /* end if */
-    else {
-        if(H5O_msg_write_real(loc->file, dxpl_id, oh, H5O_MSG_AINFO, H5O_MSG_FLAG_DONTSHARE, 0, ainfo) < 0)
+    else
+        if(H5O__msg_write_real(loc->file, oh, H5O_MSG_AINFO, H5O_MSG_FLAG_DONTSHARE, 0, ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update attribute info message")
-    } /* end else */
 
 done:
     /* Release resources */
-    if(atable.attrs && H5A_attr_release_table(&atable) < 0)
+    if(atable.attrs && H5A__attr_release_table(&atable) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute table")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1533,7 +1499,7 @@ H5O_attr_remove_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
     /* Check for correct attribute message to modify */
     if(HDstrcmp(((H5A_t *)mesg->native)->shared->name, udata->name) == 0) {
         /* Convert message into a null message (i.e. delete it) */
-        if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, TRUE) < 0)
+        if(H5O_release_mesg(udata->f, oh, mesg, TRUE) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to convert into null message")
 
         /* Indicate that the object header was modified */
@@ -1552,7 +1518,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_remove
+ * Function:	H5O__attr_remove
  *
  * Purpose:	Delete an attribute on an object.
  *
@@ -1564,35 +1530,35 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_remove(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
+H5O__attr_remove(const H5O_loc_t *loc, const char *name)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     H5O_ainfo_t ainfo;                  /* Attribute information for object */
     htri_t ainfo_exists = FALSE;        /* Whether the attribute info exists in the file */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(loc->addr)
 
     /* Check arguments */
     HDassert(loc);
     HDassert(name);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if((ainfo_exists = H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo)) < 0)
+        if((ainfo_exists = H5A__get_ainfo(loc->file, oh, &ainfo)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
     /* Check for attributes stored densely */
     if(H5F_addr_defined(ainfo.fheap_addr)) {
         /* Delete attribute from dense storage */
-        if(H5A_dense_remove(loc->file, dxpl_id, &ainfo, name) < 0)
+        if(H5A__dense_remove(loc->file, &ainfo, name) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute in dense storage")
     } /* end if */
     else {
@@ -1601,14 +1567,13 @@ H5O_attr_remove(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
 
         /* Set up user data for callback */
         udata.f = loc->file;
-        udata.dxpl_id = dxpl_id;
         udata.name = name;
         udata.found = FALSE;
 
         /* Iterate over attributes, to locate correct one to delete */
         op.op_type = H5O_MESG_OP_LIB;
         op.u.lib_op = H5O_attr_remove_cb;
-        if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+        if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "error deleting attribute")
 
         /* Check that we found the attribute */
@@ -1618,23 +1583,23 @@ H5O_attr_remove(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
 
     /* Update the attribute information after removing an attribute */
     if(ainfo_exists)
-        if(H5O_attr_remove_update(loc, oh, &ainfo, dxpl_id) < 0)
+        if(H5O_attr_remove_update(loc, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update attribute info")
 
     /* Update the modification time, if any */
-    if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE) < 0)
+    if(H5O_touch_oh(loc->file, oh, FALSE) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
 
 done:
     if(oh && H5O_unpin(oh) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_attr_remove() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__attr_remove() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_remove_by_idx
+ * Function:	H5O__attr_remove_by_idx
  *
  * Purpose:	Delete an attribute on an object, according to an order within
  *		an index.
@@ -1647,8 +1612,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
-    H5_iter_order_t order, hsize_t n, hid_t dxpl_id)
+H5O__attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     H5O_ainfo_t ainfo;                  /* Attribute information for object */
@@ -1656,27 +1621,27 @@ H5O_attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
     H5A_attr_table_t atable = {0, NULL};        /* Table of attributes */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(loc->addr)
 
     /* Check arguments */
     HDassert(loc);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if((ainfo_exists = H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo)) < 0)
+        if((ainfo_exists = H5A__get_ainfo(loc->file, oh, &ainfo)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
     /* Check for attributes stored densely */
     if(H5F_addr_defined(ainfo.fheap_addr)) {
         /* Delete attribute from dense storage */
-        if(H5A_dense_remove_by_idx(loc->file, dxpl_id, &ainfo, idx_type, order, n) < 0)
+        if(H5A__dense_remove_by_idx(loc->file, &ainfo, idx_type, order, n) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "unable to delete attribute in dense storage")
     } /* end if */
     else {
@@ -1684,7 +1649,7 @@ H5O_attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
         H5O_mesg_operator_t op;         /* Wrapper for operator */
 
         /* Build table of attributes for compact storage */
-        if(H5A_compact_build_table(loc->file, dxpl_id, oh, idx_type, order, &atable) < 0)
+        if(H5A__compact_build_table(loc->file, oh, idx_type, order, &atable) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTINIT, FAIL, "error building attribute table")
 
         /* Check for skipping too many attributes */
@@ -1693,14 +1658,13 @@ H5O_attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
 
         /* Set up user data for callback, to remove the attribute by name */
         udata.f = loc->file;
-        udata.dxpl_id = dxpl_id;
         udata.name = ((atable.attrs[n])->shared)->name;
         udata.found = FALSE;
 
         /* Iterate over attributes, to locate correct one to delete */
         op.op_type = H5O_MESG_OP_LIB;
         op.u.lib_op = H5O_attr_remove_cb;
-        if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+        if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTDELETE, FAIL, "error deleting attribute")
 
         /* Check that we found the attribute */
@@ -1710,21 +1674,21 @@ H5O_attr_remove_by_idx(const H5O_loc_t *loc, H5_index_t idx_type,
 
     /* Update the attribute information after removing an attribute */
     if(ainfo_exists)
-        if(H5O_attr_remove_update(loc, oh, &ainfo, dxpl_id) < 0)
+        if(H5O_attr_remove_update(loc, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update attribute info")
 
     /* Update the modification time, if any */
-    if(H5O_touch_oh(loc->file, dxpl_id, oh, FALSE) < 0)
+    if(H5O_touch_oh(loc->file, oh, FALSE) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
 
 done:
     if(oh && H5O_unpin(oh) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
-    if(atable.attrs && H5A_attr_release_table(&atable) < 0)
+    if(atable.attrs && H5A__attr_release_table(&atable) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTFREE, FAIL, "unable to release attribute table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_attr_remove_by_idx() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__attr_remove_by_idx() */
 
 
 /*-------------------------------------------------------------------------
@@ -1740,11 +1704,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_count_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, hsize_t *nattrs)
+H5O_attr_count_real(H5F_t *f, H5O_t *oh, hsize_t *nattrs)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, oh->cache_info.addr, FAIL)
+    FUNC_ENTER_NOAPI_NOINIT_TAG(oh->cache_info.addr)
 
     /* Check arguments */
     HDassert(f);
@@ -1757,7 +1721,7 @@ H5O_attr_count_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, hsize_t *nattrs)
         H5O_ainfo_t ainfo;                  /* Attribute information for object */
 
         /* Attempt to get the attribute information from the object header */
-        if((ainfo_exists = H5A_get_ainfo(f, dxpl_id, oh, &ainfo)) < 0)
+        if((ainfo_exists = H5A__get_ainfo(f, oh, &ainfo)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
         else if(ainfo_exists > 0)
             *nattrs = ainfo.nattrs;
@@ -1777,7 +1741,7 @@ H5O_attr_count_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, hsize_t *nattrs)
     } /* end else */
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5O_attr_count_real */
 
 
@@ -1822,7 +1786,7 @@ H5O_attr_exists_cb(H5O_t H5_ATTR_UNUSED *oh, H5O_mesg_t *mesg/*in,out*/,
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_exists
+ * Function:	H5O__attr_exists
  *
  * Purpose:	Determine if an attribute with a particular name exists on an object
  *
@@ -1834,34 +1798,34 @@ H5O_attr_exists_cb(H5O_t H5_ATTR_UNUSED *oh, H5O_mesg_t *mesg/*in,out*/,
  *-------------------------------------------------------------------------
  */
 htri_t
-H5O_attr_exists(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
+H5O__attr_exists(const H5O_loc_t *loc, const char *name)
 {
     H5O_t *oh = NULL;           /* Pointer to actual object header */
     H5O_ainfo_t ainfo;          /* Attribute information for object */
     htri_t ret_value = FAIL;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, loc->addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(loc->addr)
 
     /* Check arguments */
     HDassert(loc);
     HDassert(name);
 
     /* Protect the object header to iterate over */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
     /* Check for attributes stored densely */
     if(H5F_addr_defined(ainfo.fheap_addr)) {
         /* Check if attribute exists in dense storage */
-        if((ret_value = H5A_dense_exists(loc->file, dxpl_id, &ainfo, name)) < 0)
+        if((ret_value = H5A__dense_exists(loc->file, &ainfo, name)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error checking for existence of attribute")
     } /* end if */
     else {
@@ -1870,14 +1834,13 @@ H5O_attr_exists(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
 
         /* Set up user data for callback */
         udata.f = loc->file;
-        udata.dxpl_id = dxpl_id;
         udata.name = name;
         udata.found = FALSE;
 
         /* Iterate over existing attributes, checking for attribute with same name */
         op.op_type = H5O_MESG_OP_LIB;
         op.u.lib_op = H5O_attr_exists_cb;
-        if(H5O_msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata, dxpl_id) < 0)
+        if(H5O__msg_iterate_real(loc->file, oh, H5O_MSG_ATTR, &op, &udata) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_BADITER, FAIL, "error checking for existence of attribute")
 
         /* Check that we found the attribute */
@@ -1885,15 +1848,15 @@ H5O_attr_exists(const H5O_loc_t *loc, const char *name, hid_t dxpl_id)
     } /* end else */
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_attr_exists */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__attr_exists() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_attr_bh_info
+ * Function:    H5O__attr_bh_info
  *
  * Purpose:     For 1.8 attribute, returns storage amount for btree and fractal heap
  *
@@ -1905,14 +1868,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_attr_bh_info(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *bh_info)
+H5O__attr_bh_info(H5F_t *f, H5O_t *oh, H5_ih_info_t *bh_info)
 {
     H5HF_t      *fheap = NULL;              /* Fractal heap handle */
     H5B2_t      *bt2_name = NULL;           /* v2 B-tree handle for name index */
     H5B2_t      *bt2_corder = NULL;         /* v2 B-tree handle for creation order index */
     herr_t      ret_value = SUCCEED;        /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     HDassert(f);
     HDassert(oh);
@@ -1924,39 +1887,39 @@ H5O_attr_bh_info(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *bh_info)
         htri_t ainfo_exists = FALSE;        /* Whether the attribute info exists in the file */
 
         /* Check for (& retrieve if available) attribute info */
-        if((ainfo_exists = H5A_get_ainfo(f, dxpl_id, oh, &ainfo)) < 0)
+        if((ainfo_exists = H5A__get_ainfo(f, oh, &ainfo)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
         else if(ainfo_exists > 0) {
             /* Check if name index available */
             if(H5F_addr_defined(ainfo.name_bt2_addr)) {
                 /* Open the name index v2 B-tree */
-                if(NULL == (bt2_name = H5B2_open(f, dxpl_id, ainfo.name_bt2_addr, NULL)))
+                if(NULL == (bt2_name = H5B2_open(f, ainfo.name_bt2_addr, NULL)))
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
                 /* Get name index B-tree size */
-                if(H5B2_size(bt2_name, dxpl_id, &(bh_info->index_size)) < 0)
+                if(H5B2_size(bt2_name, &(bh_info->index_size)) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve B-tree storage info")
             } /* end if */
 
             /* Check if creation order index available */
             if(H5F_addr_defined(ainfo.corder_bt2_addr)) {
                 /* Open the creation order index v2 B-tree */
-                if(NULL == (bt2_corder = H5B2_open(f, dxpl_id, ainfo.corder_bt2_addr, NULL)))
+                if(NULL == (bt2_corder = H5B2_open(f, ainfo.corder_bt2_addr, NULL)))
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
                 /* Get creation order index B-tree size */
-                if(H5B2_size(bt2_corder, dxpl_id, &(bh_info->index_size)) < 0)
+                if(H5B2_size(bt2_corder, &(bh_info->index_size)) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve B-tree storage info")
             } /* end if */
 
             /* Get storage size of fractal heap, if it's used */
             if(H5F_addr_defined(ainfo.fheap_addr)) {
                 /* Open the fractal heap for attributes */
-                if(NULL == (fheap = H5HF_open(f, dxpl_id, ainfo.fheap_addr)))
+                if(NULL == (fheap = H5HF_open(f, ainfo.fheap_addr)))
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
                 /* Get heap storage size */
-                if(H5HF_size(fheap, dxpl_id, &(bh_info->heap_size)) < 0)
+                if(H5HF_size(fheap, &(bh_info->heap_size)) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve B-tree storage info")
             } /* end if */
         } /* end else */
@@ -1964,20 +1927,20 @@ H5O_attr_bh_info(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *bh_info)
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
-    if(bt2_name && H5B2_close(bt2_name, dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for creation order index")
 
     FUNC_LEAVE_NOAPI(ret_value)
-}   /* H5O_attr_bh_info() */
+}   /* H5O__attr_bh_info() */
 
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_attr_count
+ * Function:	H5O__attr_count
  *
  * Purpose:	Determine the # of attributes on an object
  *
@@ -1989,33 +1952,33 @@ done:
  *-------------------------------------------------------------------------
  */
 int
-H5O_attr_count(const H5O_loc_t *loc, hid_t dxpl_id)
+H5O__attr_count(const H5O_loc_t *loc)
 {
     H5O_t *oh = NULL;           /* Pointer to actual object header */
     hsize_t nattrs;             /* Number of attributes */
     int ret_value = -1;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* Check arguments */
     HDassert(loc);
 
     /* Protect the object header to iterate over */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_ATTR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Retrieve # of attributes on object */
-    if(H5O_attr_count_real(loc->file, dxpl_id, oh, &nattrs) < 0)
+    if(H5O_attr_count_real(loc->file, oh, &nattrs) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't retrieve attribute count")
 
     /* Set return value */
     ret_value = (int)nattrs;
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_ATTR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_attr_count */
+} /* end H5O__attr_count */
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
diff --git a/src/H5Obogus.c b/src/H5Obogus.c
index d1085c8..92fd218 100644
--- a/src/H5Obogus.c
+++ b/src/H5Obogus.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -39,12 +37,12 @@
 #ifdef H5O_ENABLE_BOGUS
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_bogus_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__bogus_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_bogus_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static size_t H5O_bogus_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_bogus_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE * stream,
-			     int indent, int fwidth);
+static herr_t H5O__bogus_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_BOGUS_VALID[1] = {{
@@ -52,7 +50,7 @@ const H5O_msg_class_t H5O_MSG_BOGUS_VALID[1] = {{
     "bogus valid",             	/*message name for debugging    */
     0,     	                /*native message size           */
     0,				/* messages are sharable?       */
-    H5O_bogus_decode,        	/*decode message                */
+    H5O__bogus_decode,        	/*decode message                */
     H5O_bogus_encode,        	/*encode message                */
     NULL,          	        /*copy the native value         */
     H5O_bogus_size,          	/*raw message size              */
@@ -67,7 +65,7 @@ const H5O_msg_class_t H5O_MSG_BOGUS_VALID[1] = {{
     NULL,			/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_bogus_debug         	/*debug the message             */
+    H5O__bogus_debug         	/*debug the message             */
 }};
 
 /* This message derives from H5O message class */
@@ -76,8 +74,8 @@ const H5O_msg_class_t H5O_MSG_BOGUS_INVALID[1] = {{
     "bogus invalid",          	/*message name for debugging    */
     0,                          /*native message size           */
     0,                          /* messages are sharable?       */
-    H5O_bogus_decode,           /*decode message                */
-    H5O_bogus_encode,           /*encode message                */
+    H5O__bogus_decode,          /*decode message                */
+    H5O__bogus_encode,          /*encode message                */
     NULL,                       /*copy the native value         */
     H5O_bogus_size,             /*raw message size              */
     NULL,                       /*free internal memory          */
@@ -91,12 +89,12 @@ const H5O_msg_class_t H5O_MSG_BOGUS_INVALID[1] = {{
     NULL,                       /* post copy native value to file    */
     NULL,                       /* get creation index           */
     NULL,                       /* set creation index           */
-    H5O_bogus_debug             /*debug the message             */
+    H5O__bogus_debug            /*debug the message             */
 }};
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_bogus_decode
+ * Function:    H5O__bogus_decode
  *
  * Purpose:     Decode a "bogus" message and return a pointer to a new
  *              native message struct.
@@ -112,13 +110,14 @@ const H5O_msg_class_t H5O_MSG_BOGUS_INVALID[1] = {{
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_bogus_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__bogus_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_bogus_t *mesg = NULL;
     void *ret_value;            /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -143,7 +142,7 @@ done:
         H5MM_xfree(mesg);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_bogus_decode() */
+} /* end H5O__bogus_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -204,7 +203,7 @@ H5O_bogus_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_sha
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_bogus_debug
+ * Function:    H5O__bogus_debug
  *
  * Purpose:     Prints debugging info for the message.
  *
@@ -219,12 +218,12 @@ H5O_bogus_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_sha
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_bogus_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE *stream,
-	       int indent, int fwidth)
+H5O__bogus_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
+   int indent, int fwidth)
 {
     const H5O_bogus_t	*mesg = (const H5O_bogus_t *)_mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -237,6 +236,6 @@ H5O_bogus_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const voi
             "Bogus Value:", mesg->u);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_bogus_debug() */
+} /* end H5O__bogus_debug() */
 #endif /* H5O_ENABLE_BOGUS */
 
diff --git a/src/H5Obtreek.c b/src/H5Obtreek.c
index ac6fe37..5a98e59 100644
--- a/src/H5Obtreek.c
+++ b/src/H5Obtreek.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 
@@ -29,13 +27,13 @@
 #include "H5Opkg.h"             /* Object headers			*/
 #include "H5MMprivate.h"	/* Memory management			*/
 
-static void  *H5O_btreek_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void  *H5O_btreek_decode(H5F_t *f, H5O_t *open_oh,
+    unsigned mesg_flags, unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_btreek_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void  *H5O_btreek_copy(const void *_mesg, void *_dest);
 static size_t H5O_btreek_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_btreek_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
-			     int indent, int fwidth);
+static herr_t H5O__btreek_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_BTREEK[1] = {{
@@ -58,7 +56,7 @@ const H5O_msg_class_t H5O_MSG_BTREEK[1] = {{
     NULL,			/* post copy native value to file	*/
     NULL,			/* get creation index		        */
     NULL,			/* set creation index		        */
-    H5O_btreek_debug            /*debug the message			*/
+    H5O__btreek_debug            /*debug the message			*/
 }};
 
 /* Current version of v1 B-tree 'K' value information */
@@ -80,8 +78,9 @@ const H5O_msg_class_t H5O_MSG_BTREEK[1] = {{
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_btreek_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_btreek_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_btreek_t	*mesg;          /* Native message */
     void		*ret_value = NULL;      /* Return value */
@@ -221,7 +220,7 @@ H5O_btreek_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_sh
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_btreek_debug
+ * Function:	H5O__btreek_debug
  *
  * Purpose:	Prints debugging info for the message.
  *
@@ -233,12 +232,12 @@ H5O_btreek_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_sh
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_btreek_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE *stream,
+H5O__btreek_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
     int indent, int fwidth)
 {
     const H5O_btreek_t *mesg = (const H5O_btreek_t *)_mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Sanity check */
     HDassert(f);
@@ -255,5 +254,5 @@ H5O_btreek_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const vo
 	      "Symbol table node leaf 'K' value:", mesg->sym_leaf_k);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_btreek_debug() */
+} /* end H5O__btreek_debug() */
 
diff --git a/src/H5Ocache.c b/src/H5Ocache.c
index 19b91f8..3607839 100644
--- a/src/H5Ocache.c
+++ b/src/H5Ocache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -264,12 +262,23 @@ H5O__cache_verify_chksum(const void *_image, size_t len, void *_udata)
         uint32_t stored_chksum;     /* Stored metadata checksum value */
         uint32_t computed_chksum;   /* Computed metadata checksum value */
 
-	/* Get stored and computed checksums */
-	H5F_get_checksums(image, len, &stored_chksum, &computed_chksum);
+        /* Get stored and computed checksums */
+        H5F_get_checksums(image, len, &stored_chksum, &computed_chksum);
 
-	if(stored_chksum != computed_chksum)
-	    ret_value = FALSE;
+        if(stored_chksum != computed_chksum) {
+            /* These fields are not deserialized yet in H5O__prefix_deserialize() */
+            HDassert(udata->oh->chunk == NULL);
+            HDassert(udata->oh->mesg == NULL);
+            HDassert(udata->oh->proxy == NULL);
+
+            /* Indicate that udata->oh is to be freed later
+               in H5O__prefix_deserialize() */
+            udata->free_oh = TRUE;
+            ret_value = FALSE;
+        } /* end if */
     } /* end if */
+    else
+        HDassert(!(udata->common.file_intent & H5F_ACC_SWMR_WRITE));
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O__cache_verify_chksum() */
@@ -801,7 +810,7 @@ H5O__cache_chk_deserialize(const void *image, size_t len, void *_udata,
     } /* end else */
 
     /* Increment reference count of object header */
-    if(H5O_inc_rc(udata->oh) < 0)
+    if(H5O__inc_rc(udata->oh) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "can't increment reference count on object header")
     chk_proxy->oh = udata->oh;
 
@@ -914,7 +923,6 @@ static herr_t
 H5O__cache_chk_notify(H5AC_notify_action_t action, void *_thing)
 {
     H5O_chunk_proxy_t *chk_proxy = (H5O_chunk_proxy_t *)_thing;
-    H5O_chunk_proxy_t *cont_chk_proxy = NULL; /* Proxy for chunk containing continuation message that points to this chunk, if not chunk 0 */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -929,37 +937,26 @@ H5O__cache_chk_notify(H5AC_notify_action_t action, void *_thing)
         case H5AC_NOTIFY_ACTION_AFTER_INSERT:
         case H5AC_NOTIFY_ACTION_AFTER_LOAD:
             if(chk_proxy->oh->swmr_write) {
-                /* Add flush dependency on chunk parent */
-                {
-                    void *parent;       /* Chunk containing continuation message that points to this chunk */
-
-                    /* Determine the parent of the chunk */
-                    if(chk_proxy->cont_chunkno == 0)
-                        parent = chk_proxy->oh;
-                    else {
-                        if(NULL == (cont_chk_proxy = H5O_chunk_protect(chk_proxy->f, H5AC_ind_read_dxpl_id, chk_proxy->oh, chk_proxy->cont_chunkno)))
-                            HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
-                        parent = cont_chk_proxy;
-                    } /* end else */
-
+                /* Add flush dependency on chunk with continuation, if one exists */
+                if(chk_proxy->fd_parent) {
                     /* Sanity checks */
-                    HDassert(parent);
-                    HDassert(((H5C_cache_entry_t *)parent)->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
-                    HDassert(((H5C_cache_entry_t *)parent)->type);
-                    HDassert((((H5C_cache_entry_t *)(parent))->type->id == H5AC_OHDR_ID)
-                             || (((H5C_cache_entry_t *)(parent))->type->id == H5AC_OHDR_CHK_ID));
+                    HDassert(((H5C_cache_entry_t *)(chk_proxy->fd_parent))->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
+                    HDassert(((H5C_cache_entry_t *)(chk_proxy->fd_parent))->type);
+                    HDassert((((H5C_cache_entry_t *)(chk_proxy->fd_parent))->type->id == H5AC_OHDR_ID)
+                             || (((H5C_cache_entry_t *)(chk_proxy->fd_parent))->type->id == H5AC_OHDR_CHK_ID));
 
                     /* Add flush dependency from chunk containing the continuation message
                      * that points to this chunk (either oh or another chunk proxy object)
                      */
-                    if(H5AC_create_flush_dependency(parent, chk_proxy) < 0)
+                    if(H5AC_create_flush_dependency(chk_proxy->fd_parent, chk_proxy) < 0)
                         HGOTO_ERROR(H5E_OHDR, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
+                } /* end if */
 
-                    /* Make note of the address and pointer of the flush dependency
-                     * parent so we can take the dependency down on eviction.
-                     */
-                    chk_proxy->parent = parent;
-                }
+                /* Add flush dependency on object header */
+                {
+                    if(H5AC_create_flush_dependency(chk_proxy->oh, chk_proxy) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEPEND, FAIL, "unable to create flush dependency")
+                } /* end if */
 
                 /* Add flush dependency on object header proxy, if proxy exists */
                 {
@@ -998,17 +995,21 @@ H5O__cache_chk_notify(H5AC_notify_action_t action, void *_thing)
 
         case H5AC_NOTIFY_ACTION_BEFORE_EVICT:
             if(chk_proxy->oh->swmr_write) {
-                /* Remove flush dependency on parent object header chunk */
-                {
+                /* Remove flush dependency on parent object header chunk, if one is set */
+                if(chk_proxy->fd_parent) {
                     /* Sanity checks */
-                    HDassert(chk_proxy->parent != NULL);
-                    HDassert(((H5C_cache_entry_t *)(chk_proxy->parent))->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
-                    HDassert(((H5C_cache_entry_t *)(chk_proxy->parent))->type);
-                    HDassert((((H5C_cache_entry_t *)(chk_proxy->parent))->type->id == H5AC_OHDR_ID) || (((H5C_cache_entry_t *)(chk_proxy->parent))->type->id == H5AC_OHDR_CHK_ID));
+                    HDassert(((H5C_cache_entry_t *)(chk_proxy->fd_parent))->magic == H5C__H5C_CACHE_ENTRY_T_MAGIC);
+                    HDassert(((H5C_cache_entry_t *)(chk_proxy->fd_parent))->type);
+                    HDassert((((H5C_cache_entry_t *)(chk_proxy->fd_parent))->type->id == H5AC_OHDR_ID) || (((H5C_cache_entry_t *)(chk_proxy->fd_parent))->type->id == H5AC_OHDR_CHK_ID));
 
-                    if(H5AC_destroy_flush_dependency(chk_proxy->parent, chk_proxy) < 0)
+                    if(H5AC_destroy_flush_dependency(chk_proxy->fd_parent, chk_proxy) < 0)
                         HGOTO_ERROR(H5E_OHDR, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
-                }
+                    chk_proxy->fd_parent = NULL;
+                } /* end if */
+
+                /* Unregister the object header as a parent of the virtual entry */
+                if(H5AC_destroy_flush_dependency(chk_proxy->oh, chk_proxy) < 0)
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNDEPEND, FAIL, "unable to destroy flush dependency")
 
                 /* Unregister the object header chunk as a parent of the virtual entry */
                 if(H5AC_proxy_entry_remove_parent(chk_proxy->oh->proxy, chk_proxy) < 0)
@@ -1025,10 +1026,6 @@ H5O__cache_chk_notify(H5AC_notify_action_t action, void *_thing)
     } /* end switch */
 
 done:
-    if(cont_chk_proxy)
-        if(H5O_chunk_unprotect(chk_proxy->f, H5AC_ind_read_dxpl_id, cont_chk_proxy, FALSE) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
-
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O__cache_chk_notify() */
 
@@ -1265,8 +1262,22 @@ H5O__prefix_deserialize(const uint8_t *_image, H5O_cache_ud_t *udata)
     /* Verify object header prefix length */
     HDassert((size_t)(image - _image) == (size_t)(H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)));
 
-    /* Save the object header for later use in 'deserialize' callback */
-    udata->oh = oh;
+    /* If udata->oh is to be freed (see H5O__cache_verify_chksum), 
+       save the pointer to udata->oh and free it later after setting
+       udata->oh with the new object header */
+    if(udata->free_oh) {
+        H5O_t *saved_oh = udata->oh;
+        HDassert(udata->oh); 
+
+        /* Save the object header for later use in 'deserialize' callback */
+        udata->oh = oh;
+        if(H5O__free(saved_oh) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't destroy object header")
+        udata->free_oh = FALSE;
+    } else 
+        /* Save the object header for later use in 'deserialize' callback */
+        udata->oh = oh;
+
     oh = NULL;
 
 done:
@@ -1517,7 +1528,7 @@ H5O__chunk_deserialize(H5O_t *oh, haddr_t addr, size_t len, const uint8_t *image
                 H5O_cont_t *cont;
 
                 /* Decode continuation message */
-                cont = (H5O_cont_t *)(H5O_MSG_CONT->decode)(udata->f, udata->dxpl_id, NULL, 0, &ioflags, mesg->raw);
+                cont = (H5O_cont_t *)(H5O_MSG_CONT->decode)(udata->f, NULL, 0, &ioflags, mesg->raw_size, mesg->raw);
                 H5_CHECKED_ASSIGN(cont->chunkno, unsigned, udata->cont_msg_info->nmsgs + 1, size_t); /* the next continuation message/chunk */
 
                 /* Save 'native' form of continuation message */
@@ -1533,7 +1544,7 @@ H5O__chunk_deserialize(H5O_t *oh, haddr_t addr, size_t len, const uint8_t *image
 
                 /* Decode ref. count message */
                 HDassert(oh->version > H5O_VERSION_1);
-                refcount = (H5O_refcount_t *)(H5O_MSG_REFCOUNT->decode)(udata->f, udata->dxpl_id, NULL, 0, &ioflags, mesg->raw);
+                refcount = (H5O_refcount_t *)(H5O_MSG_REFCOUNT->decode)(udata->f, NULL, 0, &ioflags, mesg->raw_size, mesg->raw);
 
                 /* Save 'native' form of ref. count message */
                 mesg->native = refcount;
diff --git a/src/H5Ocache_image.c b/src/H5Ocache_image.c
index bea99a2..ad64297 100644
--- a/src/H5Ocache_image.c
+++ b/src/H5Ocache_image.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -39,18 +37,17 @@
 #include "H5MFprivate.h"        /* File space management                 */
 
 /* Callbacks for message class */
-static void *H5O__mdci_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__mdci_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O__mdci_encode(H5F_t *f, hbool_t disable_shared, 
     uint8_t *p, const void *_mesg);
 static void *H5O__mdci_copy(const void *_mesg, void *_dest);
 static size_t H5O__mdci_size(const H5F_t *f, hbool_t disable_shared, 
     const void *_mesg);
 static herr_t H5O__mdci_free(void *mesg);
-static herr_t H5O__mdci_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    void *_mesg);
-static herr_t H5O__mdci_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-    FILE *stream, int indent, int fwidth);
+static herr_t H5O__mdci_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
+static herr_t H5O__mdci_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_MDCI[1] = {{
@@ -99,9 +96,9 @@ H5FL_DEFINE(H5O_mdci_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O__mdci_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, 
-    H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNUSED mesg_flags, 
-    unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__mdci_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_mdci_t      *mesg;                  /* Native message        */
     void            *ret_value = NULL;      /* Return value          */
@@ -278,7 +275,7 @@ H5O__mdci_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O__mdci_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
+H5O__mdci_delete(H5F_t *f, H5O_t *open_oh, void *_mesg)
 {
     H5O_mdci_t *mesg = (H5O_mdci_t *)_mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
@@ -325,13 +322,13 @@ H5O__mdci_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
          * time constraints, I don't want to go there now.
          */
         if(H5F_FIRST_ALLOC_DEALLOC(f)) {
-            HDassert(HADDR_UNDEF !=H5F_EOA_PRE_FSM_FSALLOC(f));
+            HDassert(HADDR_UNDEF != H5F_EOA_PRE_FSM_FSALLOC(f));
             HDassert(H5F_addr_ge(mesg->addr, H5F_EOA_PRE_FSM_FSALLOC(f)));
-            if(H5MF_tidy_self_referential_fsm_hack(f, dxpl_id) < 0)
+            if(H5MF_tidy_self_referential_fsm_hack(f) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "tidy of self referential fsm hack failed")
         } /* end if */
         else {
-            if(H5MF_xfree(f, H5FD_MEM_SUPER, dxpl_id, mesg->addr, mesg->size) < 0)
+            if(H5MF_xfree(f, H5FD_MEM_SUPER, mesg->addr, mesg->size) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free file space for cache image block")
         } /* end else */
     } /* end if */
@@ -354,8 +351,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O__mdci_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, 
-    const void *_mesg, FILE * stream, int indent, int fwidth)
+H5O__mdci_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_mdci_t   *mdci = (const H5O_mdci_t *) _mesg;
 
diff --git a/src/H5Ochunk.c b/src/H5Ochunk.c
index 50be171..205515a 100644
--- a/src/H5Ochunk.c
+++ b/src/H5Ochunk.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -79,7 +77,7 @@ H5FL_DEFINE(H5O_chunk_proxy_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_chunk_add
+ * Function:	H5O__chunk_add
  *
  * Purpose:	Add new chunk for object header to metadata cache
  *
@@ -93,13 +91,13 @@ H5FL_DEFINE(H5O_chunk_proxy_t);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_chunk_add(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx,
-    unsigned cont_chunkno)
+H5O__chunk_add(H5F_t *f, H5O_t *oh, unsigned idx, unsigned cont_chunkno)
 {
     H5O_chunk_proxy_t *chk_proxy = NULL;        /* Proxy for chunk, to mark it dirty in the cache */
+    H5O_chunk_proxy_t *cont_chk_proxy = NULL;   /* Proxy for chunk containing continuation message that points to this chunk, if not chunk 0 */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oh->cache_info.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(oh->cache_info.addr)
 
     /* check args */
     HDassert(f);
@@ -112,32 +110,43 @@ H5O_chunk_add(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx,
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
     /* Increment reference count on object header */
-    if(H5O_inc_rc(oh) < 0)
+    if(H5O__inc_rc(oh) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, FAIL, "can't increment reference count on object header")
 
     /* Set the values in the chunk proxy */
     chk_proxy->f = f;
     chk_proxy->oh = oh;
     chk_proxy->chunkno = idx;
-    chk_proxy->cont_chunkno = cont_chunkno;
+
+    /* Determine the parent of the chunk */
+    if(cont_chunkno != 0) {
+        if(NULL == (cont_chk_proxy = H5O__chunk_protect(f, oh, cont_chunkno)))
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
+        chk_proxy->fd_parent = cont_chk_proxy;
+    } /* end else */
 
     /* Insert the chunk proxy into the cache */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header chunk")
-
     chk_proxy = NULL;
 
 done:
+    /* Cleanup on failure */
     if(ret_value < 0)
         if(chk_proxy && H5O__chunk_dest(chk_proxy) < 0)
             HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to destroy object header chunk")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_chunk_add() */
+    /* Release resources */
+    if(cont_chk_proxy)
+        if(H5O__chunk_unprotect(f, cont_chk_proxy, FALSE) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__chunk_add() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_chunk_protect
+ * Function:	H5O__chunk_protect
  *
  * Purpose:	Protect an object header chunk for modifications
  *
@@ -151,12 +160,12 @@ done:
  *-------------------------------------------------------------------------
  */
 H5O_chunk_proxy_t *
-H5O_chunk_protect(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
+H5O__chunk_protect(H5F_t *f, H5O_t *oh, unsigned idx)
 {
     H5O_chunk_proxy_t *chk_proxy = NULL;        /* Proxy for protected chunk */
     H5O_chunk_proxy_t *ret_value = NULL;        /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oh->cache_info.addr, NULL)
+    FUNC_ENTER_PACKAGE_TAG(oh->cache_info.addr)
 
     /* check args */
     HDassert(f);
@@ -171,7 +180,7 @@ H5O_chunk_protect(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, NULL, "memory allocation failed")
 
         /* Increment reference count on object header */
-        if(H5O_inc_rc(oh) < 0)
+        if(H5O__inc_rc(oh) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "can't increment reference count on object header")
 
         /* Set chunk proxy fields */
@@ -190,7 +199,7 @@ H5O_chunk_protect(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
         chk_udata.size = oh->chunk[idx].size;
 
         /* Get the chunk proxy */
-        if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC__NO_FLAGS_SET)))
+        if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header chunk")
 
         /* Sanity check */
@@ -207,12 +216,12 @@ done:
         if(0 == idx && chk_proxy && H5O__chunk_dest(chk_proxy) < 0)
             HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, NULL, "unable to destroy object header chunk")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* end H5O_chunk_protect() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__chunk_protect() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_chunk_unprotect
+ * Function:	H5O__chunk_unprotect
  *
  * Purpose:	Unprotect an object header chunk after modifications
  *
@@ -226,12 +235,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_chunk_unprotect(H5F_t *f, hid_t dxpl_id, H5O_chunk_proxy_t *chk_proxy,
-    hbool_t dirtied)
+H5O__chunk_unprotect(H5F_t *f, H5O_chunk_proxy_t *chk_proxy, hbool_t dirtied)
 {
     herr_t ret_value = SUCCEED;        /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -247,7 +255,7 @@ H5O_chunk_unprotect(H5F_t *f, hid_t dxpl_id, H5O_chunk_proxy_t *chk_proxy,
         } /* end else/if */
 
         /* Decrement reference count of object header */
-        if(H5O_dec_rc(chk_proxy->oh) < 0)
+        if(H5O__dec_rc(chk_proxy->oh) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "can't decrement reference count on object header")
 
         /* Free fake chunk proxy */
@@ -255,13 +263,13 @@ H5O_chunk_unprotect(H5F_t *f, hid_t dxpl_id, H5O_chunk_proxy_t *chk_proxy,
     } /* end if */
     else {
         /* Release the chunk proxy from the cache, possibly marking it dirty */
-        if(H5AC_unprotect(f, dxpl_id, H5AC_OHDR_CHK, chk_proxy->oh->chunk[chk_proxy->chunkno].addr, chk_proxy, (dirtied ? H5AC__DIRTIED_FLAG : H5AC__NO_FLAGS_SET)) < 0)
+        if(H5AC_unprotect(f, H5AC_OHDR_CHK, chk_proxy->oh->chunk[chk_proxy->chunkno].addr, chk_proxy, (dirtied ? H5AC__DIRTIED_FLAG : H5AC__NO_FLAGS_SET)) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
     } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_chunk_unprotect() */
+} /* end H5O__chunk_unprotect() */
 
 
 /*-------------------------------------------------------------------------
@@ -307,7 +315,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_chunk_update_idx
+ * Function:	H5O__chunk_update_idx
  *
  * Purpose:	Update the chunk index for a chunk proxy
  *
@@ -321,13 +329,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_chunk_update_idx(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
+H5O__chunk_update_idx(H5F_t *f, H5O_t *oh, unsigned idx)
 {
-    H5O_chunk_proxy_t *chk_proxy;       /* Proxy for chunk, to mark it dirty in the cache */
+    H5O_chunk_proxy_t *chk_proxy = NULL;/* Proxy for chunk, to mark it dirty in the cache */
     H5O_chk_cache_ud_t chk_udata;       /* User data for loading chunk */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -343,23 +351,23 @@ H5O_chunk_update_idx(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
     chk_udata.size = oh->chunk[idx].size;
 
     /* Get the chunk proxy */
-    if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
     /* Update index for chunk proxy in cache */
     chk_proxy->chunkno = idx;
 
     /* Release the chunk proxy from the cache, marking it deleted */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, H5AC__DIRTIED_FLAG) < 0)
+    if(H5AC_unprotect(f, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, H5AC__DIRTIED_FLAG) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_chunk_update_idx() */
+} /* end H5O__chunk_update_idx() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_chunk_delete
+ * Function:	H5O__chunk_delete
  *
  * Purpose:	Notify metadata cache that a chunk has been deleted
  *
@@ -373,14 +381,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
+H5O__chunk_delete(H5F_t *f, H5O_t *oh, unsigned idx)
 {
-    H5O_chunk_proxy_t *chk_proxy;       /* Proxy for chunk, to mark it dirty in the cache */
-    H5O_chk_cache_ud_t chk_udata;       /* User data for loading chunk */
+    H5O_chunk_proxy_t *chk_proxy = NULL;/* Proxy for chunk, to mark it dirty in the cache */
     unsigned cache_flags = H5AC__DELETED_FLAG; /* Flags for unprotecting proxy */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oh->cache_info.addr, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(oh->cache_info.addr)
 
     /* check args */
     HDassert(f);
@@ -388,32 +395,21 @@ H5O_chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx)
     HDassert(idx < oh->nchunks);
     HDassert(idx > 0);
 
-    /* Construct the user data for protecting chunk proxy */
-    /* (and _not_ decoding it) */
-    HDmemset(&chk_udata, 0, sizeof(chk_udata));
-    chk_udata.oh = oh;
-    chk_udata.chunkno = idx;
-    chk_udata.size = oh->chunk[idx].size;
-
     /* Get the chunk proxy */
-    if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, &chk_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, idx)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
 
-    /* Sanity check */
-    HDassert(chk_proxy->oh == oh);
-    HDassert(chk_proxy->chunkno == idx);
-
     /* Only free file space if not doing SWMR writes */
     if(!oh->swmr_write)
         cache_flags |= H5AC__DIRTIED_FLAG | H5AC__FREE_FILE_SPACE_FLAG;
 
+done:
     /* Release the chunk proxy from the cache, marking it deleted */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, cache_flags) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
+    if(chk_proxy && H5AC_unprotect(f, H5AC_OHDR_CHK, oh->chunk[idx].addr, chk_proxy, cache_flags) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
 
-done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_chunk_delete() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__chunk_delete() */
 
 
 /*-------------------------------------------------------------------------
@@ -441,7 +437,7 @@ H5O__chunk_dest(H5O_chunk_proxy_t *chk_proxy)
     HDassert(chk_proxy);
 
     /* Decrement reference count of object header */
-    if(chk_proxy->oh && H5O_dec_rc(chk_proxy->oh) < 0)
+    if(chk_proxy->oh && H5O__dec_rc(chk_proxy->oh) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "can't decrement reference count on object header")
 
     /* Release the chunk proxy object */
diff --git a/src/H5Ocont.c b/src/H5Ocont.c
index 63002c5..2eb27d6 100644
--- a/src/H5Ocont.c
+++ b/src/H5Ocont.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -38,14 +36,14 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_cont_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O_cont_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_cont_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static size_t H5O_cont_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_cont_free(void *mesg);
-static herr_t H5O_cont_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg);
-static herr_t H5O_cont_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE * stream,
-			     int indent, int fwidth);
+static herr_t H5O__cont_free(void *mesg);
+static herr_t H5O__cont_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
+static herr_t H5O__cont_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_CONT[1] = {{
@@ -58,8 +56,8 @@ const H5O_msg_class_t H5O_MSG_CONT[1] = {{
     NULL,                   	/*no copy method                */
     H5O_cont_size,          	/*size of header continuation   */
     NULL,                   	/*reset method			*/
-    H5O_cont_free,	        /* free method			*/
-    H5O_cont_delete,		/* file delete method		*/
+    H5O__cont_free,	        /* free method			*/
+    H5O__cont_delete,		/* file delete method		*/
     NULL,			/* link method			*/
     NULL,			/*set share method		*/
     NULL,		    	/*can share method		*/
@@ -68,7 +66,7 @@ const H5O_msg_class_t H5O_MSG_CONT[1] = {{
     NULL, 		 	/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_cont_debug         	/*debugging                     */
+    H5O__cont_debug         	/*debugging                     */
 }};
 
 /* Declare the free list for H5O_cont_t's */
@@ -91,8 +89,9 @@ H5FL_DEFINE(H5O_cont_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_cont_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_cont_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_cont_t             *cont = NULL;
     void                   *ret_value = NULL;   /* Return value */
@@ -188,9 +187,9 @@ H5O_cont_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_cont_free
+ * Function:	H5O__cont_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -200,20 +199,20 @@ H5O_cont_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_cont_free(void *mesg)
+H5O__cont_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_cont_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_cont_free() */
+} /* end H5O__cont_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_cont_delete
+ * Function:    H5O__cont_delete
  *
  * Purpose:     Free file space referenced by message
  *
@@ -225,12 +224,12 @@ H5O_cont_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_cont_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
+H5O__cont_delete(H5F_t *f, H5O_t *open_oh, void *_mesg)
 {
     H5O_cont_t *mesg = (H5O_cont_t *) _mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -238,16 +237,16 @@ H5O_cont_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
 
     /* Notify the cache that the chunk has been deleted */
     /* (releases the space for the chunk) */
-    if(H5O_chunk_delete(f, dxpl_id, open_oh, mesg->chunkno) < 0)
+    if(H5O__chunk_delete(f, open_oh, mesg->chunkno) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to remove chunk from cache")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_cont_delete() */
+} /* end H5O__cont_delete() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_cont_debug
+ * Function:    H5O__cont_debug
  *
  * Purpose:     Prints debugging info.
  *
@@ -262,12 +261,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_cont_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__cont_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_cont_t       *cont = (const H5O_cont_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -287,4 +286,4 @@ H5O_cont_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
 	      (int) (cont->chunkno));
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_cont_debug() */
+} /* end H5O__cont_debug() */
diff --git a/src/H5Ocopy.c b/src/H5Ocopy.c
index ddf375c..e6865f1 100644
--- a/src/H5Ocopy.c
+++ b/src/H5Ocopy.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -36,6 +34,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5Aprivate.h"         /* Attributes                           */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free lists                           */
 #include "H5Iprivate.h"		/* IDs			  		*/
@@ -68,7 +67,6 @@ typedef struct H5O_copy_search_comm_dt_ud_t {
     H5SL_t      *dst_dt_list;   /* Skip list of committed datatypes */
     H5G_loc_t   *dst_root_loc;  /* Starting location for iteration */
     H5O_loc_t   obj_oloc;       /* Object location (for attribute iteration callback) */
-    hid_t       dxpl_id;        /* Dataset transfer property list id */
 } H5O_copy_search_comm_dt_ud_t;
 
 
@@ -81,23 +79,25 @@ typedef struct H5O_copy_search_comm_dt_ud_t {
 /* Local Prototypes */
 /********************/
 
-static herr_t H5O_copy_free_addrmap_cb(void *item, void *key, void *op_data);
-static herr_t H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
-    hid_t dxpl_id, H5O_copy_t *cpy_info, H5O_type_t *obj_type, void **udata);
-static herr_t H5O_copy_header(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
-    hid_t dxpl_id, hid_t ocpypl_id);
-static herr_t H5O_copy_obj(H5G_loc_t *src_loc, H5G_loc_t *dst_loc,
-    const char *dst_name, hid_t ocpypl_id, hid_t lcpl_id, hid_t dxpl_id);
-static herr_t H5O_copy_obj_by_ref(H5O_loc_t *src_oloc, hid_t dxpl_id,
-    H5O_loc_t *dst_oloc, H5G_loc_t *dst_root_loc, H5O_copy_t *cpy_info);
-static herr_t H5O_copy_free_comm_dt_cb(void *item, void *key, void *op_data);
-static int H5O_copy_comm_dt_cmp(const void *dt1, const void *dt2);
-static herr_t H5O_copy_search_comm_dt_cb(hid_t group, const char *name,
+static herr_t H5O__copy(const H5G_loc_t *loc, const char *src_name,
+    H5G_loc_t *dst_loc, const char *dst_name, hid_t ocpypl_id, hid_t lcpl_id);
+static herr_t H5O__copy_free_addrmap_cb(void *item, void *key, void *op_data);
+static herr_t H5O__copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
+    H5O_copy_t *cpy_info, H5O_type_t *obj_type, void **udata);
+static herr_t H5O__copy_header(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
+    hid_t ocpypl_id, hid_t lcpl_id);
+static herr_t H5O__copy_obj(H5G_loc_t *src_loc, H5G_loc_t *dst_loc,
+    const char *dst_name, hid_t ocpypl_id, hid_t lcpl_id);
+static herr_t H5O__copy_obj_by_ref(H5O_loc_t *src_oloc, H5O_loc_t *dst_oloc,
+    H5G_loc_t *dst_root_loc, H5O_copy_t *cpy_info);
+static herr_t H5O__copy_free_comm_dt_cb(void *item, void *key, void *op_data);
+static int H5O__copy_comm_dt_cmp(const void *dt1, const void *dt2);
+static herr_t H5O__copy_search_comm_dt_cb(hid_t group, const char *name,
     const H5L_info_t *linfo, void *udata);
-static htri_t H5O_copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
-    H5O_loc_t *oloc_dst/*in, out*/, hid_t dxpl_id, H5O_copy_t *cpy_info);
-static herr_t H5O_copy_insert_comm_dt(H5F_t *file_src, H5O_t *oh_src,
-    H5O_loc_t *oloc_dst, hid_t dxpl_id, H5O_copy_t *cpy_info);
+static htri_t H5O__copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
+    H5O_loc_t *oloc_dst/*in, out*/, H5O_copy_t *cpy_info);
+static herr_t H5O__copy_insert_comm_dt(H5F_t *file_src, H5O_t *oh_src,
+    H5O_loc_t *oloc_dst, H5O_copy_t *cpy_info);
 
 
 /*********************/
@@ -204,19 +204,10 @@ H5FL_DEFINE(haddr_t);
  */
 herr_t
 H5Ocopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
-        const char *dst_name, hid_t ocpypl_id, hid_t lcpl_id)
+    const char *dst_name, hid_t ocpypl_id, hid_t lcpl_id)
 {
     H5G_loc_t	loc;                    /* Source group group location */
-    H5G_loc_t	src_loc;                /* Source object group location */
     H5G_loc_t	dst_loc;                /* Destination group location */
-
-    /* for opening the destination object */
-    H5G_name_t  src_path;               /* Opened source object hier. path */
-    H5O_loc_t   src_oloc;               /* Opened source object object location */
-    htri_t      dst_exists;             /* Does destination name exist already? */
-    hbool_t     loc_found = FALSE;      /* Location at 'name' found */
-    hbool_t     obj_open = FALSE;       /* Entry at 'name' found */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -233,8 +224,57 @@ H5Ocopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
     if(!dst_name || !*dst_name)
 	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no destination name specified")
 
-    /* check if destination name already exists */
-    if((dst_exists = H5L_exists_tolerant(&dst_loc, dst_name, H5P_DEFAULT, dxpl_id)) < 0)
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(src_loc_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set collective metadata read info")
+
+    /* Call internal routine to copy object */
+    if(H5O__copy(&loc, src_name, &dst_loc, dst_name, ocpypl_id, lcpl_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5Ocopy() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__copy
+ *
+ * Purpose:     Internal routine to copy an object
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 29, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__copy(const H5G_loc_t *loc, const char *src_name, H5G_loc_t *dst_loc,
+    const char *dst_name, hid_t ocpypl_id, hid_t lcpl_id)
+{
+    H5G_loc_t	src_loc;                /* Source object group location */
+    H5G_name_t  src_path;               /* Opened source object hier. path */
+    H5O_loc_t   src_oloc;               /* Opened source object object location */
+    htri_t      dst_exists;             /* Does destination name exist already? */
+    hbool_t     loc_found = FALSE;      /* Location at 'name' found */
+    hbool_t     obj_open = FALSE;       /* Entry at 'name' found */
+    herr_t      ret_value = SUCCEED;	/* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(src_name && *src_name);
+    HDassert(dst_loc);
+    HDassert(dst_name && *dst_name);
+
+    /* Check if destination name already exists */
+    if((dst_exists = H5L_exists_tolerant(dst_loc, dst_name)) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to check if destination name exists")
     if(TRUE == dst_exists)
         HGOTO_ERROR(H5E_OHDR, H5E_EXISTS, FAIL, "destination object already exists")
@@ -245,7 +285,7 @@ H5Ocopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
     H5G_loc_reset(&src_loc);
 
     /* Find the source object to copy */
-    if(H5G_loc_find(&loc, src_name, &src_loc/*out*/, H5P_DEFAULT, dxpl_id) < 0)
+    if(H5G_loc_find(loc, src_name, &src_loc/*out*/) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "source object not found")
     loc_found = TRUE;
 
@@ -256,7 +296,7 @@ H5Ocopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
 
     /* Get correct property lists */
     if(H5P_DEFAULT == lcpl_id) {
-        if((lcpl_id = H5L_get_default_lcpl()) < 0)
+        if((lcpl_id = H5P_get_default(H5P_CLS_LCRT)) < 0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "unable to get default lcpl")
     } /* end if */
     else
@@ -264,14 +304,16 @@ H5Ocopy(hid_t src_loc_id, const char *src_name, hid_t dst_loc_id,
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not link creation property list")
 
     /* Get object copy property list */
-    if(H5P_DEFAULT == ocpypl_id)
-        ocpypl_id = H5P_OBJECT_COPY_DEFAULT;
+    if(H5P_DEFAULT == ocpypl_id) {
+        if((ocpypl_id = H5P_get_default(H5P_CLS_OCPY)) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "unable to get default ocpypl")
+    } /* end if */
     else
         if(TRUE != H5P_isa_class(ocpypl_id, H5P_OBJECT_COPY))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not object copy property list")
 
     /* Do the actual copying of the object */
-    if(H5O_copy_obj(&src_loc, &dst_loc, dst_name, ocpypl_id, lcpl_id, dxpl_id) < 0)
+    if(H5O__copy_obj(&src_loc, dst_loc, dst_name, ocpypl_id, lcpl_id) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
 
 done:
@@ -280,12 +322,12 @@ done:
     if(obj_open && H5O_close(&src_oloc, NULL) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CLOSEERROR, FAIL, "unable to release object header")
 
-    FUNC_LEAVE_API(ret_value)
-} /* end H5Ocopy() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__copy() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_header_real
+ * Function:    H5O__copy_header_real
  *
  * Purpose:     Copy header object from one location to another using
  *              pre-copy, copy, and post-copy callbacks for each message
@@ -302,19 +344,11 @@ done:
  * Programmer:  Peter Cao
  *              May 30, 2005
  *
- * Modifications:
- *	Vailin Choi; Feb 2012
- *	Bug fix for HDFFV-7853
- *	When the object is opened, call the object's flush class action
- *	to ensure that cached data is flushed so that H5Ocopy will get
- *	the correct data.
- *	
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
-    hid_t dxpl_id, H5O_copy_t *cpy_info, H5O_type_t *obj_type,
-    void **udata /*out*/)
+H5O__copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
+    H5O_copy_t *cpy_info, H5O_type_t *obj_type, void **udata /*out*/)
 {
     H5O_addr_map_t         *addr_map = NULL;       /* Address mapping of object copied */
     H5O_t                  *oh_src = NULL;         /* Object header for source object */
@@ -337,7 +371,7 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
     size_t                 msghdr_size;
     herr_t                 ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, oloc_src->addr, FAIL)
+    FUNC_ENTER_STATIC_TAG(oloc_src->addr)
 
     HDassert(oloc_src);
     HDassert(oloc_src->file);
@@ -346,42 +380,14 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
     HDassert(cpy_info);
 
     /* Get pointer to object class for this object */
-    if(NULL == (obj_class = H5O_obj_class(oloc_src, dxpl_id)))
+    if(NULL == (obj_class = H5O__obj_class(oloc_src)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
 
-    /* Check if the object at the address is already open in the file */
-    if(H5FO_opened(oloc_src->file, oloc_src->addr) != NULL) {
-	H5G_loc_t   tmp_loc; 	/* Location of object */
-	H5O_loc_t   tmp_oloc; 	/* Location of object */
-	H5G_name_t  tmp_path;	/* Object's path */
-	void *obj_ptr = NULL;	/* Object pointer */
-	hid_t tmp_id = -1;	/* Object ID */
-
-	tmp_loc.oloc = &tmp_oloc;
-	tmp_loc.path = &tmp_path;
-	tmp_oloc.file = oloc_src->file;
-	tmp_oloc.addr = oloc_src->addr;
-	tmp_oloc.holding_file = FALSE;
-	H5G_name_reset(tmp_loc.path);
-
-	/* Get a temporary ID */
-	if((tmp_id = obj_class->open(&tmp_loc, H5P_DEFAULT, dxpl_id, FALSE)) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to open object")
-
-	/* Get object pointer */
-	obj_ptr = H5I_object(tmp_id);
-
-	/* Flush the object */
-        if(obj_class->flush && obj_class->flush(obj_ptr, dxpl_id) < 0)
-            HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to flush object")
-
-	/* Release the temporary ID */
-	if(tmp_id != -1 && H5I_dec_app_ref(tmp_id))
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to close temporary ID")
-    } /* end if */
+    /* Set the pointer to the shared struct for the object if opened in the file */
+    cpy_info->shared_fo = H5FO_opened(oloc_src->file, oloc_src->addr);
 
     /* Get source object header */
-    if(NULL == (oh_src = H5O_protect(oloc_src, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh_src = H5O_protect(oloc_src, H5AC__READ_ONLY_FLAG, FALSE)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Retrieve user data for particular type of object to copy */
@@ -406,7 +412,7 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
         else
             /* Search for a matching committed datatype, building the list if
              * necessary */
-            if((merge = H5O_copy_search_comm_dt(oloc_src->file, oh_src, oloc_dst, dxpl_id, cpy_info)) < 0)
+            if((merge = H5O__copy_search_comm_dt(oloc_src->file, oh_src, oloc_dst, cpy_info)) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't search for matching committed datatype")
 
         if(merge) {
@@ -445,6 +451,11 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
 
     /* Initialize header information */
     oh_dst->version = oh_src->version;
+
+    /* Version bounds check for destination object header */
+    if(oh_dst->version > H5O_obj_ver_bounds[H5F_HIGH_BOUND(oloc_dst->file)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "destination object header version out of bounds")
+
     oh_dst->flags = oh_src->flags;
     oh_dst->link_msgs_seen = oh_src->link_msgs_seen;
     oh_dst->attr_msgs_seen = oh_src->attr_msgs_seen;
@@ -518,7 +529,13 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
 
         if(copy_type->pre_copy_file) {
             /* Decode the message if necessary. */
-            H5O_LOAD_NATIVE(oloc_src->file, dxpl_id, 0, oh_src, mesg_src, FAIL)
+            H5O_LOAD_NATIVE(oloc_src->file, 0, oh_src, mesg_src, FAIL)
+
+            /* Save destination file pointer in cpy_info so that it can be used
+               in the pre_copy_file callback to obtain the destination file's
+               high bound.  The high bound is used to index into the corresponding
+               message's array of versions for doing version bounds check. */
+            cpy_info->file_dst = oloc_dst->file;
 
             /* Perform "pre copy" operation on message */
             if((copy_type->pre_copy_file)(oloc_src->file, mesg_src->native,
@@ -590,7 +607,7 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
             unsigned mesg_flags;        /* Message flags */
 
             /* Decode the message if necessary. */
-            H5O_LOAD_NATIVE(oloc_src->file, dxpl_id, 0, oh_src, mesg_src, FAIL)
+            H5O_LOAD_NATIVE(oloc_src->file, 0, oh_src, mesg_src, FAIL)
 
             /* Get destination message flags, and unset shared and shareable
              * flags.  mesg_dst->flags will contain the original flags for now.
@@ -600,9 +617,9 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
 
             /* Copy the source message */
             recompute_size = FALSE;
-            if((mesg_dst->native = H5O_msg_copy_file(copy_type, oloc_src->file,
+            if(NULL == (mesg_dst->native = H5O__msg_copy_file(copy_type, oloc_src->file,
                     mesg_src->native, oloc_dst->file, &recompute_size,
-                    &mesg_flags, cpy_info, cpy_udata, dxpl_id)) == NULL)
+                    &mesg_flags, cpy_info, cpy_udata)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object header message")
 
             /* Check if the sharing state changed, and recompute the size if so
@@ -683,7 +700,7 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
     dst_oh_size += (uint64_t)H5O_SIZEOF_HDR(oh_dst);
 
     /* Allocate space for chunk in destination file */
-    if(HADDR_UNDEF == (oh_dst->chunk[0].addr = H5MF_alloc(oloc_dst->file, H5FD_MEM_OHDR, dxpl_id, (hsize_t)dst_oh_size)))
+    if(HADDR_UNDEF == (oh_dst->chunk[0].addr = H5MF_alloc(oloc_dst->file, H5FD_MEM_OHDR, (hsize_t)dst_oh_size)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for object header")
     addr_new = oh_dst->chunk[0].addr;
 
@@ -786,7 +803,7 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
      * the copied datatype into the list of committed datatypes in the target file.
      */
     if(cpy_info->merge_comm_dt && obj_class->type == H5O_TYPE_NAMED_DATATYPE)
-        if(H5O_copy_insert_comm_dt(oloc_src->file, oh_src, oloc_dst, dxpl_id, cpy_info) < 0)
+        if(H5O__copy_insert_comm_dt(oloc_src->file, oh_src, oloc_dst, cpy_info) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't insert committed datatype into destination list")
 
     /* Allocate space for the address mapping of the object copied */
@@ -851,7 +868,7 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
 
             /* Perform "post copy" operation on message */
             if((copy_type->post_copy_file)(oloc_src, mesg_src->native, oloc_dst,
-                    mesg_dst->native, &mesg_flags, dxpl_id, cpy_info) < 0)
+                    mesg_dst->native, &mesg_flags, cpy_info) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to perform 'post copy' operation on message")
 
             /* Verify that the flags did not change */
@@ -873,16 +890,16 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
         HGOTO_ERROR(H5E_CACHE, H5E_CANTTAG, FAIL, "unable to re-tag metadata entries")
 
     /* Set metadata tag for destination object's object header */
-    H5_BEGIN_TAG(dxpl_id, oloc_dst->addr, FAIL);
+    H5_BEGIN_TAG(oloc_dst->addr);
 
     /* Insert destination object header in cache */
-    if(H5AC_insert_entry(oloc_dst->file, dxpl_id, H5AC_OHDR, oloc_dst->addr, oh_dst, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(oloc_dst->file, H5AC_OHDR, oloc_dst->addr, oh_dst, H5AC__NO_FLAGS_SET) < 0)
         HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header")
     oh_dst = NULL;
     inserted = TRUE;
 
     /* Reset metadat tag */
-    H5_END_TAG(FAIL);
+    H5_END_TAG
 
     /* Set obj_type and udata, if requested */
     if(obj_type) {
@@ -897,19 +914,26 @@ done:
         H5MM_free(deleted);
 
     /* Release pointer to source object header and its derived objects */
-    if(oh_src && H5O_unprotect(oloc_src, dxpl_id, oh_src, H5AC__NO_FLAGS_SET) < 0)
+    if(oh_src && H5O_unprotect(oloc_src, oh_src, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     /* Free destination object header on failure */
-    if(ret_value < 0 && oh_dst && !inserted) {
-        if(H5O__free(oh_dst) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
-        if(H5O_loc_reset(oloc_dst) < 0)
-            HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
-    } /* end if */
+    if(ret_value < 0) {
+        if(oh_dst && !inserted) {
+            if(H5O__free(oh_dst) < 0)
+                HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
+            if(H5O_loc_reset(oloc_dst) < 0)
+                HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
+        } /* end if */
+
+        if(addr_map == NULL && cpy_udata) {
+            if(obj_class && obj_class->free_copy_file_udata)
+                obj_class->free_copy_file_udata(cpy_udata);
+        } /* end if */
+    }
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5O_copy_header_real() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__copy_header_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -927,8 +951,8 @@ done:
  */
 herr_t
 H5O_copy_header_map(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
-    hid_t dxpl_id, H5O_copy_t *cpy_info, hbool_t inc_depth,
-    H5O_type_t *obj_type, void **udata /*out*/)
+    H5O_copy_t *cpy_info, hbool_t inc_depth, H5O_type_t *obj_type,
+    void **udata /*out*/)
 {
     H5O_addr_map_t      *addr_map = NULL;       /* Address mapping of object copied */
     H5_obj_t            src_obj_pos;            /* Position of source object */
@@ -962,8 +986,7 @@ H5O_copy_header_map(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
             cpy_info->curr_depth++;
 
         /* Copy object referred to */
-        if(H5O_copy_header_real(oloc_src, oloc_dst, dxpl_id, cpy_info, obj_type,
-                udata) < 0)
+        if(H5O__copy_header_real(oloc_src, oloc_dst, cpy_info, obj_type, udata) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
 
         /* Check for incrementing the depth of copy */
@@ -1002,7 +1025,7 @@ H5O_copy_header_map(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
 
     /* Increment destination object's link count, if allowed */
     if(inc_link)
-        if(H5O_link(oloc_dst, 1, dxpl_id) < 0)
+        if(H5O_link(oloc_dst, 1) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to increment object link count")
 
 done:
@@ -1012,11 +1035,11 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5O_copy_free_addrmap_cb
+    H5O__copy_free_addrmap_cb
  PURPOSE
     Internal routine to free address maps from the skip list for copying objects
  USAGE
-    herr_t H5O_copy_free_addrmap_cb(item, key, op_data)
+    herr_t H5O__copy_free_addrmap_cb(item, key, op_data)
         void *item;             IN/OUT: Pointer to addr
         void *key;              IN/OUT: (unused)
         void *op_data;          IN: (unused)
@@ -1030,11 +1053,11 @@ done:
  REVISION LOG
 --------------------------------------------------------------------------*/
 static herr_t
-H5O_copy_free_addrmap_cb(void *_item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNUSED *op_data)
+H5O__copy_free_addrmap_cb(void *_item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNUSED *op_data)
 {
     H5O_addr_map_t *item = (H5O_addr_map_t *)_item;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(item);
 
@@ -1049,11 +1072,11 @@ H5O_copy_free_addrmap_cb(void *_item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNU
     item = H5FL_FREE(H5O_addr_map_t, item);
 
     FUNC_LEAVE_NOAPI(0)
-}   /* H5O_copy_free_addrmap_cb() */
+}   /* H5O__copy_free_addrmap_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_header
+ * Function:    H5O__copy_header
  *
  * Purpose:     copy header object from one location to another.
  *
@@ -1065,8 +1088,8 @@ H5O_copy_free_addrmap_cb(void *_item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNU
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_copy_header(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out */,
-    hid_t dxpl_id, hid_t ocpypl_id)
+H5O__copy_header(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out */,
+    hid_t ocpypl_id, hid_t lcpl_id)
 {
     H5O_copy_t  cpy_info;               /* Information for copying object */
     H5P_genplist_t  *ocpy_plist;        /* Object copy property list created */
@@ -1075,7 +1098,7 @@ H5O_copy_header(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out */,
     unsigned    cpy_option = 0;         /* Copy options */
     herr_t      ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(oloc_src);
@@ -1130,26 +1153,29 @@ H5O_copy_header(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out */,
     cpy_info.mcdt_cb = cb_info.func;
     cpy_info.mcdt_ud = cb_info.user_data;
 
+    /* Add property lists needed by callbacks */
+    cpy_info.lcpl_id = lcpl_id;
+
     /* Create a skip list to keep track of which objects are copied */
     if(NULL == (cpy_info.map_list = H5SL_create(H5SL_TYPE_OBJ, NULL)))
         HGOTO_ERROR(H5E_SLIST, H5E_CANTCREATE, FAIL, "cannot make skip list")
 
     /* copy the object from the source file to the destination file */
-    if(H5O_copy_header_real(oloc_src, oloc_dst, dxpl_id, &cpy_info, NULL, NULL) < 0)
+    if(H5O__copy_header_real(oloc_src, oloc_dst, &cpy_info, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
 
 done:
     if(cpy_info.map_list)
-        H5SL_destroy(cpy_info.map_list, H5O_copy_free_addrmap_cb, NULL);
+        H5SL_destroy(cpy_info.map_list, H5O__copy_free_addrmap_cb, NULL);
     if(cpy_info.dst_dt_list)
-        H5SL_destroy(cpy_info.dst_dt_list, H5O_copy_free_comm_dt_cb, NULL);
+        H5SL_destroy(cpy_info.dst_dt_list, H5O__copy_free_comm_dt_cb, NULL);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_copy_header() */
+} /* end H5O__copy_header() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_obj
+ * Function:    H5O__copy_obj
  *
  * Purpose:     Copy an object to destination location
  *
@@ -1161,8 +1187,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_copy_obj(H5G_loc_t *src_loc, H5G_loc_t *dst_loc, const char *dst_name,
-    hid_t ocpypl_id, hid_t lcpl_id, hid_t dxpl_id)
+H5O__copy_obj(H5G_loc_t *src_loc, H5G_loc_t *dst_loc, const char *dst_name,
+    hid_t ocpypl_id, hid_t lcpl_id)
 {
     H5G_name_t      new_path;                   /* Copied object group hier. path */
     H5O_loc_t       new_oloc;                   /* Copied object object location */
@@ -1171,7 +1197,7 @@ H5O_copy_obj(H5G_loc_t *src_loc, H5G_loc_t *dst_loc, const char *dst_name,
     hbool_t         entry_inserted = FALSE;     /* Flag to indicate that the new entry was inserted into a group */
     herr_t          ret_value = SUCCEED;        /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC
 
     HDassert(src_loc);
     HDassert(src_loc->oloc->file);
@@ -1186,12 +1212,12 @@ H5O_copy_obj(H5G_loc_t *src_loc, H5G_loc_t *dst_loc, const char *dst_name,
     new_oloc.file = dst_loc->oloc->file;
 
     /* Make a copy of the destination file, in case the original is changed by
-     * H5O_copy_header.  If and when oloc's point to the shared file struct,
+     * H5O__copy_header.  If and when oloc's point to the shared file struct,
      * this will no longer be necessary, so this code can be removed. */
     cached_dst_file = dst_loc->oloc->file;
 
     /* Copy the object from the source file to the destination file */
-    if(H5O_copy_header(src_loc->oloc, &new_oloc, dxpl_id, ocpypl_id) < 0)
+    if(H5O__copy_header(src_loc->oloc, &new_oloc, ocpypl_id, lcpl_id) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
 
     /* Patch dst_loc.  Again, this can be removed once oloc's point to shared
@@ -1199,7 +1225,7 @@ H5O_copy_obj(H5G_loc_t *src_loc, H5G_loc_t *dst_loc, const char *dst_name,
     dst_loc->oloc->file = cached_dst_file;
 
     /* Insert the new object in the destination file's group */
-    if(H5L_link(dst_loc, dst_name, &new_loc, lcpl_id, H5P_DEFAULT, dxpl_id) < 0)
+    if(H5L_link(dst_loc, dst_name, &new_loc, lcpl_id) < 0)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to insert link")
     entry_inserted = TRUE;
 
@@ -1209,11 +1235,11 @@ done:
         H5G_loc_free(&new_loc);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_copy_obj() */
+} /* end H5O__copy_obj() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_obj_by_ref
+ * Function:    H5O__copy_obj_by_ref
  *
  * Purpose:     Copy the object pointed by _src_ref.
  *
@@ -1225,19 +1251,18 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_copy_obj_by_ref(H5O_loc_t *src_oloc, hid_t dxpl_id, H5O_loc_t *dst_oloc,
+H5O__copy_obj_by_ref(H5O_loc_t *src_oloc, H5O_loc_t *dst_oloc,
     H5G_loc_t *dst_root_loc, H5O_copy_t *cpy_info)
 {
     herr_t  ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC
 
     HDassert(src_oloc);
     HDassert(dst_oloc);
 
     /* Perform the copy, or look up existing copy */
-    if((ret_value = H5O_copy_header_map(src_oloc, dst_oloc, dxpl_id, cpy_info,
-            FALSE, NULL, NULL)) < 0)
+    if((ret_value = H5O_copy_header_map(src_oloc, dst_oloc, cpy_info, FALSE, NULL, NULL)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
 
     /* Check if a new valid object is copied to the destination */
@@ -1263,7 +1288,7 @@ H5O_copy_obj_by_ref(H5O_loc_t *src_oloc, hid_t dxpl_id, H5O_loc_t *dst_oloc,
          * pass the obj_type and udata fields returned by H5O_copy_header_map.
          * This could be changed in the future to slightly improve performance
          * --NAF */
-        if(H5L_link(dst_root_loc, tmp_obj_name, &new_loc, H5P_DEFAULT, H5P_DEFAULT, dxpl_id) < 0)
+        if(H5L_link(dst_root_loc, tmp_obj_name, &new_loc, cpy_info->lcpl_id) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to insert link")
 
         H5G_loc_free(&new_loc);
@@ -1271,7 +1296,7 @@ H5O_copy_obj_by_ref(H5O_loc_t *src_oloc, hid_t dxpl_id, H5O_loc_t *dst_oloc,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_copy_obj_by_ref() */
+} /* end H5O__copy_obj_by_ref() */
 
 
 /*-------------------------------------------------------------------------
@@ -1287,9 +1312,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, hid_t dxpl_id,
-    H5F_t *file_dst, void *_dst_ref, size_t ref_count, H5R_type_t ref_type,
-    H5O_copy_t *cpy_info)
+H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, H5F_t *file_dst,
+    void *_dst_ref, size_t ref_count, H5R_type_t ref_type, H5O_copy_t *cpy_info)
 {
     H5O_loc_t 	dst_oloc;         	/* Copied object object location */
     H5O_loc_t	src_oloc;          	/* Temporary object location for source object */
@@ -1335,7 +1359,7 @@ H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, hid_t dxpl_id,
 
             /* Attempt to copy object from source to destination file */
             if(src_oloc.addr != (haddr_t)0) {
-                if(H5O_copy_obj_by_ref(&src_oloc, dxpl_id, &dst_oloc, &dst_root_loc, cpy_info) < 0)
+                if(H5O__copy_obj_by_ref(&src_oloc, &dst_oloc, &dst_root_loc, cpy_info) < 0)
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
             } /* end if */
             else
@@ -1364,7 +1388,7 @@ H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, hid_t dxpl_id,
 
             if(hobjid.addr != (haddr_t)0) {
                 /* Get the dataset region from the heap (allocate inside routine) */
-                if((buf = (uint8_t *)H5HG_read(src_oloc.file, dxpl_id, &hobjid, NULL, &buf_size)) == NULL)
+                if((buf = (uint8_t *)H5HG_read(src_oloc.file, &hobjid, NULL, &buf_size)) == NULL)
                     HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
 
                 /* Get the object oid for the dataset */
@@ -1373,7 +1397,7 @@ H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, hid_t dxpl_id,
                 dst_oloc.addr = HADDR_UNDEF;
 
                 /* copy the object pointed by the ref to the destination */
-                if(H5O_copy_obj_by_ref(&src_oloc, dxpl_id, &dst_oloc, &dst_root_loc, cpy_info) < 0) {
+                if(H5O__copy_obj_by_ref(&src_oloc, &dst_oloc, &dst_root_loc, cpy_info) < 0) {
                     H5MM_xfree(buf);
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
                 } /* end if */
@@ -1383,7 +1407,7 @@ H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, hid_t dxpl_id,
                 H5F_addr_encode(dst_oloc.file, &p, dst_oloc.addr);
 
                 /* Save the serialized buffer to the destination */
-                if(H5HG_insert(dst_oloc.file, dxpl_id, buf_size, buf, &hobjid) < 0) {
+                if(H5HG_insert(dst_oloc.file, buf_size, buf, &hobjid) < 0) {
                     H5MM_xfree(buf);
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "Unable to write dataset region information")
                 } /* end if */
@@ -1410,7 +1434,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_free_comm_dt_cb
+ * Function:    H5O__copy_free_comm_dt_cb
  *
  * Purpose:     Frees the merge committed dt skip list key and object.
  *
@@ -1422,12 +1446,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_copy_free_comm_dt_cb(void *item, void *_key, void H5_ATTR_UNUSED *op_data)
+H5O__copy_free_comm_dt_cb(void *item, void *_key, void H5_ATTR_UNUSED *_op_data)
 {
     haddr_t     *addr = (haddr_t *)item;
     H5O_copy_search_comm_dt_key_t *key = (H5O_copy_search_comm_dt_key_t *)_key;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(addr);
     HDassert(key);
@@ -1438,11 +1462,11 @@ H5O_copy_free_comm_dt_cb(void *item, void *_key, void H5_ATTR_UNUSED *op_data)
     addr = H5FL_FREE(haddr_t, addr);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_copy_free_comm_dt_cb */
+} /* end H5O__copy_free_comm_dt_cb */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_comm_dt_cmp
+ * Function:    H5O__copy_comm_dt_cmp
  *
  * Purpose:     Skiplist callback used to compare 2 keys for the merge
  *              committed dt list.  Mostly a wrapper for H5T_cmp.
@@ -1457,13 +1481,13 @@ H5O_copy_free_comm_dt_cb(void *item, void *_key, void H5_ATTR_UNUSED *op_data)
  *-------------------------------------------------------------------------
  */
 static int
-H5O_copy_comm_dt_cmp(const void *_key1, const void *_key2)
+H5O__copy_comm_dt_cmp(const void *_key1, const void *_key2)
 {
     const H5O_copy_search_comm_dt_key_t *key1 = (const H5O_copy_search_comm_dt_key_t *)_key1;
     const H5O_copy_search_comm_dt_key_t *key2 = (const H5O_copy_search_comm_dt_key_t *)_key2;
     int ret_value = 0;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Check fileno.  It is unlikely to be different so check if they are equal
      * first so only one comparison needs to be made. */
@@ -1478,7 +1502,7 @@ H5O_copy_comm_dt_cmp(const void *_key1, const void *_key2)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_copy_comm_dt_cmp */
+} /* end H5O__copy_comm_dt_cmp */
 
 
 /*-------------------------------------------------------------------------
@@ -1576,10 +1600,6 @@ done:
  * Programmer:  Neil Fortner
  *              Nov 3 2011
  *
- * Modifications:
- *      Vailin Choi; August 2012
- *      Use H5O_obj_class to get object type instead of
- *      H5O_get_info(...TRUE....) saving time in traversing metadata.
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -1602,7 +1622,7 @@ H5O_copy_search_comm_dt_check(H5O_loc_t *obj_oloc,
     HDassert(udata->dst_root_loc);
 
     /* Get pointer to object class for this object */
-    if((obj_class = H5O_obj_class(obj_oloc, udata->dxpl_id)) == NULL)
+    if((obj_class = H5O__obj_class(obj_oloc)) == NULL)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
 
     /* Check if the object is a datatype, a dataset using a committed
@@ -1613,7 +1633,7 @@ H5O_copy_search_comm_dt_check(H5O_loc_t *obj_oloc,
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
         /* Read the destination datatype */
-        if(NULL == (key->dt = (H5T_t *)H5O_msg_read(obj_oloc, H5O_DTYPE_ID, NULL, udata->dxpl_id)))
+        if(NULL == (key->dt = (H5T_t *)H5O_msg_read(obj_oloc, H5O_DTYPE_ID, NULL)))
             HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read DTYPE message")
 
         /* Get destination object fileno */
@@ -1638,7 +1658,7 @@ H5O_copy_search_comm_dt_check(H5O_loc_t *obj_oloc,
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
         /* Read the destination datatype */
-        if(NULL == (key->dt = (H5T_t *)H5O_msg_read(obj_oloc, H5O_DTYPE_ID, NULL, udata->dxpl_id)))
+        if(NULL == (key->dt = (H5T_t *)H5O_msg_read(obj_oloc, H5O_DTYPE_ID, NULL)))
             HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read DTYPE message")
 
         /* Check if the datatype is committed and search the skip list if so
@@ -1666,8 +1686,7 @@ H5O_copy_search_comm_dt_check(H5O_loc_t *obj_oloc,
     attr_op.u.lib_op = H5O_copy_search_comm_dt_attr_cb;
     udata->obj_oloc.file = obj_oloc->file;
     udata->obj_oloc.addr = obj_oloc->addr;
-    if(H5O_attr_iterate_real((hid_t)-1, obj_oloc, udata->dxpl_id, H5_INDEX_NAME, 
-                             H5_ITER_NATIVE, (hsize_t)0, NULL, &attr_op, udata) < 0)
+    if(H5O_attr_iterate_real((hid_t)-1, obj_oloc, H5_INDEX_NAME, H5_ITER_NATIVE, (hsize_t)0, NULL, &attr_op, udata) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "error iterating over attributes");
 
 done:
@@ -1689,7 +1708,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_search_comm_dt_cb
+ * Function:    H5O__copy_search_comm_dt_cb
  *
  * Purpose:     H5G_visit callback to add committed datatypes to the merge
  *              committed dt skiplist.  Mostly a wrapper for
@@ -1703,7 +1722,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_copy_search_comm_dt_cb(hid_t H5_ATTR_UNUSED group, const char *name,
+H5O__copy_search_comm_dt_cb(hid_t H5_ATTR_UNUSED group, const char *name,
     const H5L_info_t *linfo, void *_udata)
 {
     H5O_copy_search_comm_dt_ud_t *udata = (H5O_copy_search_comm_dt_ud_t *)_udata; /* Skip list of dtypes in dest file */
@@ -1713,7 +1732,7 @@ H5O_copy_search_comm_dt_cb(hid_t H5_ATTR_UNUSED group, const char *name,
     hbool_t     obj_found = FALSE;      /* Object at 'name' found */
     herr_t      ret_value = H5_ITER_CONT; /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(name);
@@ -1730,7 +1749,7 @@ H5O_copy_search_comm_dt_cb(hid_t H5_ATTR_UNUSED group, const char *name,
         H5G_loc_reset(&obj_loc);
 
         /* Find the object */
-        if(H5G_loc_find(udata->dst_root_loc, name, &obj_loc/*out*/, H5P_LINK_ACCESS_DEFAULT, udata->dxpl_id) < 0)
+        if(H5G_loc_find(udata->dst_root_loc, name, &obj_loc/*out*/) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, H5_ITER_ERROR, "object not found")
         obj_found = TRUE;
 
@@ -1745,11 +1764,11 @@ done:
         HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, H5_ITER_ERROR, "can't free location")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_copy_search_comm_dt_cb */
+} /* end H5O__copy_search_comm_dt_cb */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_search_comm_dt
+ * Function:    H5O__copy_search_comm_dt
  *
  * Purpose:     Checks if the committed datatype present in oh_src matches any
  *              in the destination file, building the destination file
@@ -1766,8 +1785,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
-    H5O_loc_t *oloc_dst/*in, out*/, hid_t dxpl_id, H5O_copy_t *cpy_info)
+H5O__copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
+    H5O_loc_t *oloc_dst/*in, out*/, H5O_copy_t *cpy_info)
 {
     H5O_copy_search_comm_dt_key_t *key = NULL; /* Skiplist key */
     haddr_t     *dst_addr;      /* Destination datatype address */
@@ -1775,7 +1794,7 @@ H5O_copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
     H5O_copy_search_comm_dt_ud_t udata; /* Group iteration user data */
     herr_t      ret_value = FALSE; /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(oh_src);
@@ -1789,7 +1808,7 @@ H5O_copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
     /* Read the source datatype */
-    if(NULL == (key->dt = (H5T_t *)H5O_msg_read_oh(file_src, dxpl_id, oh_src, H5O_DTYPE_ID, NULL)))
+    if(NULL == (key->dt = (H5T_t *)H5O_msg_read_oh(file_src, oh_src, H5O_DTYPE_ID, NULL)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read DTYPE message")
 
     /* Get destination object fileno */
@@ -1798,7 +1817,7 @@ H5O_copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
     /* Check if the destination dtype list exists, create it if it does not */
     if(!cpy_info->dst_dt_list) {
         /* Create the skip list */
-        if(NULL == (cpy_info->dst_dt_list = H5SL_create(H5SL_TYPE_GENERIC, H5O_copy_comm_dt_cmp)))
+        if(NULL == (cpy_info->dst_dt_list = H5SL_create(H5SL_TYPE_GENERIC, H5O__copy_comm_dt_cmp)))
             HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create skip list for committed datatypes")
 
         /* Add suggested types to list, if they are present */
@@ -1824,12 +1843,11 @@ H5O_copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
             udata.dst_root_loc = &dst_root_loc;
             udata.obj_oloc.file = NULL;
             udata.obj_oloc.addr = HADDR_UNDEF;
-            udata.dxpl_id = dxpl_id;
 
             /* Walk through the list of datatype suggestions */
             while(suggestion) {
                 /* Find the object */
-                if(H5G_loc_find(&dst_root_loc, suggestion->path, &obj_loc/*out*/, H5P_LINK_ACCESS_DEFAULT, dxpl_id) < 0)
+                if(H5G_loc_find(&dst_root_loc, suggestion->path, &obj_loc/*out*/) < 0)
                     /* Ignore errors - i.e. suggestions not present in
                      * destination file */
                     H5E_clear_stack(NULL);
@@ -1889,11 +1907,10 @@ H5O_copy_search_comm_dt(H5F_t *file_src, H5O_t *oh_src,
                 udata.dst_root_loc = &dst_root_loc;
                 udata.obj_oloc.file = NULL;
                 udata.obj_oloc.addr = HADDR_UNDEF;
-                udata.dxpl_id = dxpl_id;
 
                 /* Traverse the destination file, adding committed datatypes to the skip
                 * list */
-                if(H5G_visit(H5F_FILE_ID(oloc_dst->file), "/", H5_INDEX_NAME, H5_ITER_NATIVE, H5O_copy_search_comm_dt_cb, &udata, H5P_LINK_ACCESS_DEFAULT, dxpl_id) < 0)
+                if(H5G_visit(H5F_FILE_ID(oloc_dst->file), "/", H5_INDEX_NAME, H5_ITER_NATIVE, H5O__copy_search_comm_dt_cb, &udata) < 0)
                     HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
                 cpy_info->dst_dt_list_complete = TRUE;
             } /* end if */
@@ -1920,11 +1937,11 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_copy_search_comm_dt */
+} /* end H5O__copy_search_comm_dt */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_copy_insert_comm_dt
+ * Function:    H5O__copy_insert_comm_dt
  *
  * Purpose:     Insert the committed datatype at oloc_dst into the merge committed
  *              dt skiplist.  The datatype must not be present already.
@@ -1937,14 +1954,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_copy_insert_comm_dt(H5F_t *file_src, H5O_t *oh_src, H5O_loc_t *oloc_dst,
-    hid_t dxpl_id, H5O_copy_t *cpy_info)
+H5O__copy_insert_comm_dt(H5F_t *file_src, H5O_t *oh_src, H5O_loc_t *oloc_dst,
+    H5O_copy_t *cpy_info)
 {
     H5O_copy_search_comm_dt_key_t *key = NULL; /* Skiplist key */
     haddr_t     *addr = NULL;   /* Destination object address */
     herr_t      ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(oh_src);
@@ -1960,7 +1977,7 @@ H5O_copy_insert_comm_dt(H5F_t *file_src, H5O_t *oh_src, H5O_loc_t *oloc_dst,
 
     /* Read the datatype.  Read from the source file because the destination
      * object could be changed in the post-copy. */
-    if(NULL == (key->dt = (H5T_t *)H5O_msg_read_oh(file_src, dxpl_id, oh_src, H5O_DTYPE_ID, NULL)))
+    if(NULL == (key->dt = (H5T_t *)H5O_msg_read_oh(file_src, oh_src, H5O_DTYPE_ID, NULL)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read DTYPE message")
 
     /* Get destination object fileno */
@@ -1987,5 +2004,5 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_copy_insert_comm_dt */
+} /* end H5O__copy_insert_comm_dt */
 
diff --git a/src/H5Odbg.c b/src/H5Odbg.c
index 827f40c..1fc95dd 100644
--- a/src/H5Odbg.c
+++ b/src/H5Odbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -241,12 +239,10 @@ H5O_assert(const H5O_t *oh)
  *		koziol@ncsa.uiuc.edu
  *		Feb 13 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_debug_id(unsigned type_id, H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream, int indent, int fwidth)
+H5O_debug_id(unsigned type_id, H5F_t *f, const void *mesg, FILE *stream, int indent, int fwidth)
 {
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
     herr_t      ret_value = FAIL;       /* Return value */
@@ -265,7 +261,7 @@ H5O_debug_id(unsigned type_id, H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *
     HDassert(fwidth >= 0);
 
     /* Call the debug method in the class */
-    if((ret_value = (type->debug)(f, dxpl_id, mesg, stream, indent, fwidth)) < 0)
+    if((ret_value = (type->debug)(f, mesg, stream, indent, fwidth)) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, FAIL, "unable to debug message")
 
 done:
@@ -291,7 +287,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_debug_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, haddr_t addr, FILE *stream, int indent, int fwidth)
+H5O_debug_real(H5F_t *f, H5O_t *oh, haddr_t addr, FILE *stream, int indent, int fwidth)
 {
     size_t	mesg_total = 0, chunk_total = 0, gap_total = 0;
     unsigned	*sequence = NULL;
@@ -521,13 +517,13 @@ H5O_debug_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, haddr_t addr, FILE *stream, i
 	/* decode the message */
 	debug_type = oh->mesg[i].type;
 	if(NULL == oh->mesg[i].native && debug_type->decode)
-            H5O_LOAD_NATIVE(f, dxpl_id, H5O_DECODEIO_NOCHANGE, oh, &oh->mesg[i], FAIL)
+            H5O_LOAD_NATIVE(f, H5O_DECODEIO_NOCHANGE, oh, &oh->mesg[i], FAIL)
 
 	/* print the message */
 	HDfprintf(stream, "%*s%-*s\n", indent + 3, "", MAX(0, fwidth - 3),
 		  "Message Information:");
 	if(debug_type->debug && oh->mesg[i].native != NULL)
-	    (debug_type->debug)(f, dxpl_id, oh->mesg[i].native, stream, indent + 6, MAX(0, fwidth - 6));
+	    (debug_type->debug)(f, oh->mesg[i].native, stream, indent + 6, MAX(0, fwidth - 6));
 	else
 	    HDfprintf(stream, "%*s<No info for this message>\n", indent + 6, "");
     } /* end for */
@@ -558,7 +554,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int fwidth)
+H5O_debug(H5F_t *f, haddr_t addr, FILE *stream, int indent, int fwidth)
 {
     H5O_t	*oh = NULL;             /* Object header to display */
     H5O_loc_t   loc;                    /* Object location for object to delete */
@@ -578,14 +574,14 @@ H5O_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent, int f
     loc.addr = addr;
     loc.holding_file = FALSE;
 
-    if(NULL == (oh = H5O_protect(&loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(&loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* debug */
-    H5O_debug_real(f, dxpl_id, oh, addr, stream, indent, fwidth);
+    H5O_debug_real(f, oh, addr, stream, indent, fwidth);
 
 done:
-    if(oh && H5O_unprotect(&loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(&loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Odrvinfo.c b/src/H5Odrvinfo.c
index 2fdf494..159c950 100644
--- a/src/H5Odrvinfo.c
+++ b/src/H5Odrvinfo.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 
@@ -29,14 +27,14 @@
 #include "H5Opkg.h"             /* Object headers			*/
 #include "H5MMprivate.h"	/* Memory management			*/
 
-static void  *H5O_drvinfo_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void  *H5O_drvinfo_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_drvinfo_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void  *H5O_drvinfo_copy(const void *_mesg, void *_dest);
 static size_t H5O_drvinfo_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_drvinfo_reset(void *_mesg);
-static herr_t H5O_drvinfo_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
-			     int indent, int fwidth);
+static herr_t H5O__drvinfo_reset(void *_mesg);
+static herr_t H5O__drvinfo_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_DRVINFO[1] = {{
@@ -48,7 +46,7 @@ const H5O_msg_class_t H5O_MSG_DRVINFO[1] = {{
     H5O_drvinfo_encode,		/*encode message                        */
     H5O_drvinfo_copy,           /*copy the native value                 */
     H5O_drvinfo_size,		/*raw message size			*/
-    H5O_drvinfo_reset,          /*free internal memory			*/
+    H5O__drvinfo_reset,         /*free internal memory			*/
     NULL,                       /* free method				*/
     NULL,			/* file delete method			*/
     NULL,			/* link method				*/
@@ -59,7 +57,7 @@ const H5O_msg_class_t H5O_MSG_DRVINFO[1] = {{
     NULL,			/* post copy native value to file	*/
     NULL,			/* get creation index		        */
     NULL,			/* set creation index		        */
-    H5O_drvinfo_debug           /*debug the message			*/
+    H5O__drvinfo_debug           /*debug the message			*/
 }};
 
 /* Current version of driver info information */
@@ -81,8 +79,9 @@ const H5O_msg_class_t H5O_MSG_DRVINFO[1] = {{
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_drvinfo_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_drvinfo_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_drvinfo_t	*mesg;          /* Native message */
     void		*ret_value = NULL;      /* Return value */
@@ -247,7 +246,7 @@ H5O_drvinfo_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_s
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_drvinfo_reset
+ * Function:    H5O__drvinfo_reset
  *
  * Purpose:     Frees internal pointers and resets the message to an
  *              initial state.
@@ -261,11 +260,11 @@ H5O_drvinfo_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_s
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_drvinfo_reset(void *_mesg)
+H5O__drvinfo_reset(void *_mesg)
 {
     H5O_drvinfo_t *mesg = (H5O_drvinfo_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(mesg);
@@ -274,11 +273,11 @@ H5O_drvinfo_reset(void *_mesg)
     mesg->buf = (uint8_t *)H5MM_xfree(mesg->buf);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_drvinfo_reset() */
+} /* end H5O__drvinfo_reset() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_drvinfo_debug
+ * Function:	H5O__drvinfo_debug
  *
  * Purpose:	Prints debugging info for the message.
  *
@@ -290,12 +289,12 @@ H5O_drvinfo_reset(void *_mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_drvinfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE *stream,
+H5O__drvinfo_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
     int indent, int fwidth)
 {
     const H5O_drvinfo_t *mesg = (const H5O_drvinfo_t *)_mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Sanity check */
     HDassert(f);
@@ -310,6 +309,6 @@ H5O_drvinfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const v
 	      "Buffer size:", mesg->len);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_drvinfo_debug() */
+} /* end H5O__drvinfo_debug() */
 
 
diff --git a/src/H5Odtype.c b/src/H5Odtype.c
index 7ccf328..8060398 100644
--- a/src/H5Odtype.c
+++ b/src/H5Odtype.c
@@ -5,51 +5,48 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Omodule.h"          /* This source code file is part of the H5O module */
 #define H5T_FRIEND		/*prevent warning from including H5Tpkg   */
 
 
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* Files				*/
-#include "H5FLprivate.h"	/* Free Lists				*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Opkg.h"             /* Object headers			*/
-#include "H5Tpkg.h"		/* Datatypes				*/
-#include "H5VMprivate.h"		/* Vectors and arrays 			*/
+#include "H5private.h"		/* Generic Functions    */
+#include "H5Dprivate.h"		/* Datasets	            */
+#include "H5Eprivate.h"		/* Error handling       */
+#include "H5Fprivate.h"		/* Files                */
+#include "H5FLprivate.h"	/* Free Lists           */
+#include "H5Gprivate.h"		/* Groups               */
+#include "H5MMprivate.h"	/* Memory management    */
+#include "H5Opkg.h"         /* Object headers       */
+#include "H5Tpkg.h"         /* Datatypes            */
+#include "H5VMprivate.h"    /* Vectors and arrays   */
 
 
 /* PRIVATE PROTOTYPES */
 static herr_t H5O_dtype_encode(H5F_t *f, uint8_t *p, const void *mesg);
-static void *H5O_dtype_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O_dtype_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static void *H5O_dtype_copy(const void *_mesg, void *_dest);
 static size_t H5O_dtype_size(const H5F_t *f, const void *_mesg);
-static herr_t H5O_dtype_reset(void *_mesg);
+static herr_t H5O__dtype_reset(void *_mesg);
 static herr_t H5O__dtype_free(void *_mesg);
 static herr_t H5O_dtype_set_share(void *_mesg, const H5O_shared_t *sh);
 static htri_t H5O_dtype_can_share(const void *_mesg);
 static herr_t H5O_dtype_pre_copy_file(H5F_t *file_src, const void *mesg_src,
     hbool_t *deleted, const H5O_copy_t *cpy_info, void *_udata);
-static void *H5O_dtype_copy_file(H5F_t *file_src, const H5O_msg_class_t *mesg_type,
+static void *H5O__dtype_copy_file(H5F_t *file_src, const H5O_msg_class_t *mesg_type,
     void *native_src, H5F_t *file_dst, hbool_t *recompute_size,
-    H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-static herr_t H5O_dtype_shared_post_copy_upd(const H5O_loc_t *src_oloc,
-    const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst, hid_t dxpl_id,
+    H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__dtype_shared_post_copy_upd(const H5O_loc_t *src_oloc,
+    const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst, 
     H5O_copy_t *cpy_info);
-
-static herr_t H5O_dtype_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-    FILE * stream, int indent, int fwidth);
+static herr_t H5O__dtype_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* Set up & include shared message "interface" info */
 #define H5O_SHARED_TYPE			H5O_MSG_DTYPE
@@ -59,17 +56,17 @@ static herr_t H5O_dtype_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
 #define H5O_SHARED_ENCODE_REAL		H5O_dtype_encode
 #define H5O_SHARED_SIZE			H5O_dtype_shared_size
 #define H5O_SHARED_SIZE_REAL		H5O_dtype_size
-#define H5O_SHARED_DELETE		H5O_dtype_shared_delete
+#define H5O_SHARED_DELETE		H5O__dtype_shared_delete
 #undef H5O_SHARED_DELETE_REAL
-#define H5O_SHARED_LINK			H5O_dtype_shared_link
+#define H5O_SHARED_LINK			H5O__dtype_shared_link
 #undef H5O_SHARED_LINK_REAL
-#define H5O_SHARED_COPY_FILE		H5O_dtype_shared_copy_file
-#define H5O_SHARED_COPY_FILE_REAL	H5O_dtype_copy_file
+#define H5O_SHARED_COPY_FILE		H5O__dtype_shared_copy_file
+#define H5O_SHARED_COPY_FILE_REAL	H5O__dtype_copy_file
 #define H5O_SHARED_POST_COPY_FILE	H5O_dtype_shared_post_copy_file
 #undef  H5O_SHARED_POST_COPY_FILE_REAL
-#define H5O_SHARED_POST_COPY_FILE_UPD   H5O_dtype_shared_post_copy_upd
+#define H5O_SHARED_POST_COPY_FILE_UPD   H5O__dtype_shared_post_copy_upd
 #define H5O_SHARED_DEBUG		H5O_dtype_shared_debug
-#define H5O_SHARED_DEBUG_REAL		H5O_dtype_debug
+#define H5O_SHARED_DEBUG_REAL		H5O__dtype_debug
 #include "H5Oshared.h"			/* Shared Object Header Message Callbacks */
 
 /* Macros to check for the proper version of a datatype */
@@ -101,14 +98,14 @@ const H5O_msg_class_t H5O_MSG_DTYPE[1] = {{
     H5O_dtype_shared_encode,	/* encode message		*/
     H5O_dtype_copy,		/* copy the native value	*/
     H5O_dtype_shared_size,	/* size of raw message		*/
-    H5O_dtype_reset,		/* reset method			*/
+    H5O__dtype_reset,		/* reset method			*/
     H5O__dtype_free,		/* free method			*/
-    H5O_dtype_shared_delete,	/* file delete method		*/
-    H5O_dtype_shared_link,	/* link method			*/
+    H5O__dtype_shared_delete,	/* file delete method		*/
+    H5O__dtype_shared_link,	/* link method			*/
     H5O_dtype_set_share,	/* set share method		*/
     H5O_dtype_can_share,	/* can share method		*/
     H5O_dtype_pre_copy_file,	/* pre copy native value to file */
-    H5O_dtype_shared_copy_file,	/* copy native value to file    */
+    H5O__dtype_shared_copy_file,	/* copy native value to file    */
     H5O_dtype_shared_post_copy_file,	/* post copy native value to file */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
@@ -362,7 +359,7 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p
                             } /* end if */
 
                             /* Close the base type for the array */
-                            H5T_close(temp_type);
+                            (void)H5T_close_real(temp_type);
 
                             /* Make the array type the type that is set for the field */
                             temp_type = array_dt;
@@ -1082,9 +1079,8 @@ done:
     Decode a message and return a pointer to a memory struct
 	with the decoded information
  USAGE
-    void *H5O_dtype_decode(f, dxpl_id, mesg_flags, p)
+    void *H5O_dtype_decode(f, mesg_flags, p)
 	H5F_t *f;		IN: pointer to the HDF5 file struct
-        hid_t dxpl_id;          IN: DXPL for any I/O
         unsigned mesg_flags;    IN: Message flags to influence decoding
 	const uint8 *p;		IN: the raw information buffer
  RETURNS
@@ -1095,8 +1091,8 @@ done:
     function using malloc() and is returned to the caller.
 --------------------------------------------------------------------------*/
 static void *
-H5O_dtype_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
-    unsigned *ioflags/*in,out*/, const uint8_t *p)
+H5O_dtype_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
+    unsigned *ioflags/*in,out*/, size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5T_t	*dt = NULL;
     void        *ret_value = NULL;     /* Return value */
@@ -1346,7 +1342,7 @@ H5O_dtype_size(const H5F_t *f, const void *_mesg)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_dtype_reset
+ * Function:	H5O__dtype_reset
  *
  * Purpose:	Frees resources within a message, but doesn't free
  *		the message itself.
@@ -1356,22 +1352,20 @@ H5O_dtype_size(const H5F_t *f, const void *_mesg)
  * Programmer:	Robb Matzke
  *		Tuesday, December  9, 1997
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_dtype_reset(void *_mesg)
+H5O__dtype_reset(void *_mesg)
 {
     H5T_t		   *dt = (H5T_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     if(dt)
         H5T__free(dt);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_dtype_reset() */
+} /* end H5O__dtype_reset() */
 
 
 /*-------------------------------------------------------------------------
@@ -1397,7 +1391,7 @@ H5O__dtype_free(void *mesg)
     HDassert(mesg);
 
     /* Release the datatype */
-    if(H5T_close((H5T_t *)mesg) < 0)
+    if(H5T_close_real((H5T_t *)mesg) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free datatype")
 
 done:
@@ -1518,7 +1512,7 @@ done:
  */
 static herr_t
 H5O_dtype_pre_copy_file(H5F_t *file_src, const void *mesg_src,
-    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t H5_ATTR_UNUSED *cpy_info,
+    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t *cpy_info,
     void *_udata)
 {
     const H5T_t	*dt_src = (const H5T_t *)mesg_src;  /* Source datatype */
@@ -1530,6 +1524,13 @@ H5O_dtype_pre_copy_file(H5F_t *file_src, const void *mesg_src,
     /* check args */
     HDassert(file_src);
     HDassert(dt_src);
+    HDassert(cpy_info);
+    HDassert(cpy_info->file_dst);
+
+    /* Check to ensure that the version of the message to be copied does not exceed
+       the message version as indicated by the destination file's high bound */
+    if(dt_src->shared->version > H5O_dtype_ver_bounds[H5F_HIGH_BOUND(cpy_info->file_dst)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "datatype message version out of bounds")
 
     /* If the user data is non-NULL, assume we are copying a dataset
      * and check if we need to make a copy of the datatype for later in
@@ -1554,7 +1555,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_dtype_copy_file
+ * Function:    H5O__dtype_copy_file
  *
  * Purpose:     Copy a native datatype message from one file to another.
  *
@@ -1567,14 +1568,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_dtype_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const H5O_msg_class_t *mesg_type,
+H5O__dtype_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const H5O_msg_class_t *mesg_type,
     void *native_src, H5F_t *file_dst, hbool_t H5_ATTR_UNUSED *recompute_size,
-    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void H5_ATTR_UNUSED *udata, hid_t H5_ATTR_UNUSED dxpl_id)
+    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void H5_ATTR_UNUSED *udata)
 {
     H5T_t *dst_mesg;            /* Destination datatype */
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Perform a normal copy of the object header message */
     if(NULL == (dst_mesg = (H5T_t *)H5O_dtype_copy(native_src, NULL)))
@@ -1589,12 +1590,13 @@ H5O_dtype_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const H5O_msg_class_t *mesg_
 done:
     if(NULL == ret_value)
         H5O_msg_free(mesg_type->id, dst_mesg);
+
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dtype_copy_file() */
+} /* end H5O__dtype_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_dtype_shared_post_copy_upd
+ * Function:    H5O__dtype_shared_post_copy_upd
  *
  * Purpose:     Update a message after the shared message operations
  *              during the post-copy loop
@@ -1607,14 +1609,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_dtype_shared_post_copy_upd(const H5O_loc_t H5_ATTR_UNUSED *src_oloc,
+H5O__dtype_shared_post_copy_upd(const H5O_loc_t H5_ATTR_UNUSED *src_oloc,
     const void H5_ATTR_UNUSED *mesg_src, H5O_loc_t H5_ATTR_UNUSED *dst_oloc, void *mesg_dst,
-    hid_t H5_ATTR_UNUSED dxpl_id, H5O_copy_t H5_ATTR_UNUSED *cpy_info)
+    H5O_copy_t H5_ATTR_UNUSED *cpy_info)
 {
     H5T_t       *dt_dst = (H5T_t *)mesg_dst;    /* Destination datatype */
     herr_t ret_value = SUCCEED;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     if(dt_dst->sh_loc.type == H5O_SHARE_TYPE_COMMITTED) {
         HDassert(H5T_committed(dt_dst));
@@ -1628,16 +1630,16 @@ H5O_dtype_shared_post_copy_upd(const H5O_loc_t H5_ATTR_UNUSED *src_oloc,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dtype_shared_post_copy_upd */
+} /* end H5O__dtype_shared_post_copy_upd */
 
 
 /*--------------------------------------------------------------------------
  NAME
-    H5O_dtype_debug
+    H5O__dtype_debug
  PURPOSE
     Prints debugging information for a message
  USAGE
-    void *H5O_dtype_debug(f, mesg, stream, indent, fwidth)
+    void *H5O__dtype_debug(f, mesg, stream, indent, fwidth)
 	H5F_t *f;		IN: pointer to the HDF5 file struct
 	const void *mesg;	IN: Pointer to the source simple datatype
 				    struct
@@ -1651,8 +1653,8 @@ done:
     parameter.
 --------------------------------------------------------------------------*/
 static herr_t
-H5O_dtype_debug(H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream,
-		int indent, int fwidth)
+H5O__dtype_debug(H5F_t *f, const void *mesg, FILE *stream, int indent,
+    int fwidth)
 {
     const H5T_t		*dt = (const H5T_t*)mesg;
     const char		*s;
@@ -1660,7 +1662,7 @@ H5O_dtype_debug(H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream,
     unsigned		i;
     size_t		k;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -1744,13 +1746,13 @@ H5O_dtype_debug(H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream,
             HDfprintf(stream, "%*s%-*s %lu\n", indent+3, "", MAX(0, fwidth-3),
                 "Byte offset:",
                 (unsigned long)(dt->shared->u.compnd.memb[i].offset));
-            H5O_dtype_debug(f, dxpl_id, dt->shared->u.compnd.memb[i].type, stream,
+            H5O__dtype_debug(f, dt->shared->u.compnd.memb[i].type, stream,
                     indent + 3, MAX(0, fwidth - 3));
         } /* end for */
     } /* end if */
     else if(H5T_ENUM == dt->shared->type) {
         HDfprintf(stream, "%*s%s\n", indent, "", "Base type:");
-        H5O_dtype_debug(f, dxpl_id, dt->shared->parent, stream, indent+3, MAX(0, fwidth-3));
+        H5O__dtype_debug(f, dt->shared->parent, stream, indent+3, MAX(0, fwidth-3));
         HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
             "Number of members:",
             dt->shared->u.enumer.nmembs);
@@ -1980,7 +1982,7 @@ H5O_dtype_debug(H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream,
             HDfprintf(stream, "%s%u", (i ? ", " : ""), (unsigned)dt->shared->u.array.dim[i]);
         HDfprintf(stream, "}\n");
         HDfprintf(stream, "%*s%s\n", indent, "", "Base type:");
-        H5O_dtype_debug(f, dxpl_id, dt->shared->parent, stream, indent + 3, MAX(0, fwidth - 3));
+        H5O__dtype_debug(f, dt->shared->parent, stream, indent + 3, MAX(0, fwidth - 3));
     } /* end else if */
     else {
         switch (dt->shared->u.atomic.order) {
@@ -2164,5 +2166,5 @@ H5O_dtype_debug(H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream,
     } /* end else */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_dtype_debug() */
+} /* end H5O__dtype_debug() */
 
diff --git a/src/H5Oefl.c b/src/H5Oefl.c
index 149c8b2..6a81a46 100644
--- a/src/H5Oefl.c
+++ b/src/H5Oefl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -29,17 +27,17 @@
 #include "H5Opkg.h"             /* Object headers			*/
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_efl_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O_efl_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_efl_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_efl_copy(const void *_mesg, void *_dest);
 static size_t H5O_efl_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_efl_reset(void *_mesg);
-static void *H5O_efl_copy_file(H5F_t *file_src, void *mesg_src,
+static herr_t H5O__efl_reset(void *_mesg);
+static void *H5O__efl_copy_file(H5F_t *file_src, void *mesg_src,
     H5F_t *file_dst, hbool_t *recompute_size, unsigned *mesg_flags,
-    H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-static herr_t H5O_efl_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE * stream,
-			    int indent, int fwidth);
+    H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__efl_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_EFL[1] = {{
@@ -51,35 +49,35 @@ const H5O_msg_class_t H5O_MSG_EFL[1] = {{
     H5O_efl_encode,	    	/*encode message		*/
     H5O_efl_copy,	    	/*copy native value		*/
     H5O_efl_size,	    	/*size of message on disk	*/
-    H5O_efl_reset,	    	/*reset method		    	*/
-    NULL,		            /* free method			*/
+    H5O__efl_reset,	    	/*reset method		    	*/
+    NULL,		        /* free method			*/
     NULL,		        /* file delete method		*/
     NULL,			/* link method			*/
     NULL,			/*set share method		*/
     NULL,		    	/*can share method		*/
     NULL,			/* pre copy native value to file */
-    H5O_efl_copy_file,		/* copy native value to file    */
+    H5O__efl_copy_file,		/* copy native value to file    */
     NULL,			/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_efl_debug	    	/*debug the message		*/
+    H5O__efl_debug	    	/*debug the message		*/
 }};
 
 #define H5O_EFL_VERSION		1
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_efl_decode
+ * Function:    H5O_efl_decode
  *
  * Purpose:	Decode an external file list message and return a pointer to
- *		the message (and some other data).
+ *          the message (and some other data).
  *
- * Return:	Success:	Ptr to a new message struct.
+ * Return:  Success:    Ptr to a new message struct.
  *
- *		Failure:	NULL
+ *          Failure:    NULL
  *
  * Programmer:	Robb Matzke
- *		Tuesday, November 25, 1997
+ *              Tuesday, November 25, 1997
  *
  * Modification:
  *              Raymond Lu
@@ -89,15 +87,16 @@ const H5O_msg_class_t H5O_MSG_EFL[1] = {{
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_efl_decode(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_efl_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
-    H5O_efl_t		*mesg = NULL;
-    int			version;
-    const char		*s = NULL;
-    H5HL_t              *heap;
-    size_t		u;                      /* Local index variable */
-    void                *ret_value = NULL;      /* Return value */
+    H5O_efl_t   *mesg = NULL;
+    int         version;
+    const char  *s = NULL;
+    H5HL_t      *heap;
+    size_t      u;                  /* Local index variable */
+    void        *ret_value = NULL;  /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
@@ -106,12 +105,12 @@ H5O_efl_decode(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
     HDassert(p);
 
     if(NULL == (mesg = (H5O_efl_t *)H5MM_calloc(sizeof(H5O_efl_t))))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Version */
     version = *p++;
     if(version != H5O_EFL_VERSION)
-	HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "bad version number for external file list message")
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "bad version number for external file list message")
 
     /* Reserved */
     p += 3;
@@ -128,7 +127,7 @@ H5O_efl_decode(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
 #ifndef NDEBUG
     HDassert(H5F_addr_defined(mesg->heap_addr));
 
-    if(NULL == (heap = H5HL_protect(f, dxpl_id, mesg->heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(f, mesg->heap_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, NULL, "unable to read protect link value")
 
     s = (const char *)H5HL_offset_into(heap, 0);
@@ -143,24 +142,26 @@ H5O_efl_decode(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
     /* Decode the file list */
     mesg->slot = (H5O_efl_entry_t *)H5MM_calloc(mesg->nalloc * sizeof(H5O_efl_entry_t));
     if(NULL == mesg->slot)
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
-    if(NULL == (heap = H5HL_protect(f, dxpl_id, mesg->heap_addr, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (heap = H5HL_protect(f, mesg->heap_addr, H5AC__READ_ONLY_FLAG)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, NULL, "unable to read protect link value")
     for(u = 0; u < mesg->nused; u++) {
-	/* Name */
-	H5F_DECODE_LENGTH (f, p, mesg->slot[u].name_offset);
-
-        s = (const char *)H5HL_offset_into(heap, mesg->slot[u].name_offset);
-	HDassert(s && *s);
-	mesg->slot[u].name = H5MM_xstrdup (s);
+        /* Name */
+        H5F_DECODE_LENGTH (f, p, mesg->slot[u].name_offset);
+
+        if((s = (const char *)H5HL_offset_into(heap, mesg->slot[u].name_offset)) == NULL)
+            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, NULL, "unable to get external file name")
+        if(*s == (char)'\0')
+            HGOTO_ERROR(H5E_SYM, H5E_CANTGET, NULL, "invalid external file name")
+        mesg->slot[u].name = H5MM_xstrdup (s);
         HDassert(mesg->slot[u].name);
 
-	/* File offset */
-	H5F_DECODE_LENGTH (f, p, mesg->slot[u].offset);
+        /* File offset */
+        H5F_DECODE_LENGTH (f, p, mesg->slot[u].offset);
 
-	/* Size */
-	H5F_DECODE_LENGTH (f, p, mesg->slot[u].size);
+        /* Size */
+        H5F_DECODE_LENGTH (f, p, mesg->slot[u].size);
     } /* end for */
 
     if(H5HL_unprotect(heap) < 0)
@@ -347,7 +348,7 @@ H5O_efl_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void *
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_efl_reset
+ * Function:	H5O__efl_reset
  *
  * Purpose:	Frees internal pointers and resets the message to an
  *		initialial state.
@@ -360,12 +361,12 @@ H5O_efl_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_efl_reset(void *_mesg)
+H5O__efl_reset(void *_mesg)
 {
     H5O_efl_t	*mesg = (H5O_efl_t *) _mesg;
     size_t	u;              /* Local index variable */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(mesg);
@@ -382,7 +383,7 @@ H5O_efl_reset(void *_mesg)
     mesg->nused = mesg->nalloc = 0;
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_efl_reset() */
+} /* end H5O__efl_reset() */
 
 
 /*-------------------------------------------------------------------------
@@ -425,7 +426,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_efl_copy_file
+ * Function:    H5O__efl_copy_file
  *
  * Purpose:     Copies an efl message from _MESG to _DEST in file
  *
@@ -439,9 +440,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_efl_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *mesg_src, H5F_t *file_dst,
+H5O__efl_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *mesg_src, H5F_t *file_dst,
     hbool_t H5_ATTR_UNUSED *recompute_size, unsigned H5_ATTR_UNUSED *mesg_flags,
-    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void H5_ATTR_UNUSED *_udata, hid_t dxpl_id)
+    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void H5_ATTR_UNUSED *_udata)
 {
     H5O_efl_t   *efl_src = (H5O_efl_t *) mesg_src;
     H5O_efl_t   *efl_dst = NULL;
@@ -449,7 +450,7 @@ H5O_efl_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *mesg_src, H5F_t *file_ds
     size_t      idx, size, name_offset, heap_size;
     void        *ret_value = NULL;              /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__COPIED_TAG, NULL)
+    FUNC_ENTER_STATIC_TAG(H5AC__COPIED_TAG)
 
     /* check args */
     HDassert(efl_src);
@@ -468,15 +469,15 @@ H5O_efl_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *mesg_src, H5F_t *file_ds
         heap_size += H5HL_ALIGN(HDstrlen(efl_src->slot[idx].name) + 1);
 
     /* Create name heap */
-    if(H5HL_create(file_dst, dxpl_id, heap_size, &efl_dst->heap_addr/*out*/) < 0)
+    if(H5HL_create(file_dst, heap_size, &efl_dst->heap_addr/*out*/) < 0)
         HGOTO_ERROR(H5E_EFL, H5E_CANTINIT, NULL, "can't create heap")
 
     /* Pin the heap down in memory */
-    if(NULL == (heap = H5HL_protect(file_dst, dxpl_id, efl_dst->heap_addr, H5AC__NO_FLAGS_SET)))
+    if(NULL == (heap = H5HL_protect(file_dst, efl_dst->heap_addr, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_EFL, H5E_PROTECT, NULL, "unable to protect EFL file name heap")
 
     /* Insert "empty" name first */
-    if(UFAIL == (name_offset = H5HL_insert(file_dst, dxpl_id, heap, (size_t)1, "")))
+    if(UFAIL == (name_offset = H5HL_insert(file_dst, heap, (size_t)1, "")))
         HGOTO_ERROR(H5E_EFL, H5E_CANTINSERT, NULL, "can't insert file name into heap")
     HDassert(0 == name_offset);
 
@@ -493,7 +494,7 @@ H5O_efl_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *mesg_src, H5F_t *file_ds
     /* copy the name from the source */
     for(idx = 0; idx < efl_src->nused; idx++) {
         efl_dst->slot[idx].name = H5MM_xstrdup(efl_src->slot[idx].name);
-        if(UFAIL == (efl_dst->slot[idx].name_offset = H5HL_insert(file_dst, dxpl_id, heap,
+        if(UFAIL == (efl_dst->slot[idx].name_offset = H5HL_insert(file_dst, heap,
                 HDstrlen(efl_dst->slot[idx].name) + 1, efl_dst->slot[idx].name)))
             HGOTO_ERROR(H5E_EFL, H5E_CANTINSERT, NULL, "can't insert file name into heap")
     } /* end for */
@@ -509,12 +510,12 @@ done:
         if(efl_dst)
             H5MM_xfree(efl_dst);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* end H5O_efl_copy_file() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__efl_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_efl_debug
+ * Function:	H5O__efl_debug
  *
  * Purpose:	Prints debugging info for a message.
  *
@@ -526,13 +527,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_efl_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	      int indent, int fwidth)
+H5O__efl_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth)
 {
     const H5O_efl_t	   *mesg = (const H5O_efl_t *) _mesg;
     size_t		    u;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -572,5 +573,5 @@ H5O_efl_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
     } /* end for */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_efl_debug() */
+} /* end H5O__efl_debug() */
 
diff --git a/src/H5Ofill.c b/src/H5Ofill.c
index 745d027..932241f 100644
--- a/src/H5Ofill.c
+++ b/src/H5Ofill.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Robb Matzke <matzke@llnl.gov>
@@ -23,30 +21,32 @@
 #include "H5Omodule.h"          /* This source code file is part of the H5O module */
 
 
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5FLprivate.h"	/* Free Lists				*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Opkg.h"             /* Object headers			*/
-#include "H5Pprivate.h"		/* Property lists			*/
-#include "H5Sprivate.h"		/* Dataspaces				*/
+#include "H5private.h"      /* Generic Functions    */
+#include "H5Dprivate.h"     /* Datasets	            */
+#include "H5Eprivate.h"     /* Error handling       */
+#include "H5FLprivate.h"    /* Free Lists           */
+#include "H5Iprivate.h"     /* IDs                  */
+#include "H5MMprivate.h"    /* Memory management    */
+#include "H5Opkg.h"         /* Object headers       */
+#include "H5Pprivate.h"     /* Property lists       */
+#include "H5Sprivate.h"     /* Dataspaces           */
 
 
-static void  *H5O_fill_old_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void  *H5O_fill_old_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_fill_old_encode(H5F_t *f, uint8_t *p, const void *_mesg);
 static size_t H5O_fill_old_size(const H5F_t *f, const void *_mesg);
-static void  *H5O_fill_new_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void  *H5O_fill_new_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_fill_new_encode(H5F_t *f, uint8_t *p, const void *_mesg);
 static size_t H5O_fill_new_size(const H5F_t *f, const void *_mesg);
 static void  *H5O_fill_copy(const void *_mesg, void *_dest);
-static herr_t H5O_fill_reset(void *_mesg);
-static herr_t H5O_fill_free(void *_mesg);
-static herr_t H5O_fill_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
-			     int indent, int fwidth);
+static herr_t H5O__fill_reset(void *_mesg);
+static herr_t H5O__fill_free(void *_mesg);
+static herr_t H5O__fill_pre_copy_file(H5F_t *file_src, const void *mesg_src,
+    hbool_t *deleted, const H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__fill_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* Set up & include shared message "interface" info */
 #define H5O_SHARED_TYPE			H5O_MSG_FILL
@@ -56,17 +56,17 @@ static herr_t H5O_fill_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *s
 #define H5O_SHARED_ENCODE_REAL		H5O_fill_old_encode
 #define H5O_SHARED_SIZE			H5O_fill_shared_size
 #define H5O_SHARED_SIZE_REAL		H5O_fill_old_size
-#define H5O_SHARED_DELETE		H5O_fill_shared_delete
+#define H5O_SHARED_DELETE		H5O__fill_shared_delete
 #undef H5O_SHARED_DELETE_REAL
-#define H5O_SHARED_LINK			H5O_fill_shared_link
+#define H5O_SHARED_LINK			H5O__fill_shared_link
 #undef H5O_SHARED_LINK_REAL
-#define H5O_SHARED_COPY_FILE		H5O_fill_shared_copy_file
+#define H5O_SHARED_COPY_FILE		H5O__fill_shared_copy_file
 #undef H5O_SHARED_COPY_FILE_REAL
 #define H5O_SHARED_POST_COPY_FILE	H5O_fill_shared_post_copy_file
 #undef H5O_SHARED_POST_COPY_FILE_REAL
 #undef  H5O_SHARED_POST_COPY_FILE_UPD
 #define H5O_SHARED_DEBUG		H5O_fill_shared_debug
-#define H5O_SHARED_DEBUG_REAL		H5O_fill_debug
+#define H5O_SHARED_DEBUG_REAL		H5O__fill_debug
 #include "H5Oshared.h"			/* Shared Object Header Message Callbacks */
 
 /* Set up & include shared message "interface" info */
@@ -86,13 +86,13 @@ static herr_t H5O_fill_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *s
 #undef H5O_SHARED_SIZE_REAL
 #define H5O_SHARED_SIZE_REAL		H5O_fill_new_size
 #undef H5O_SHARED_DELETE
-#define H5O_SHARED_DELETE		H5O_fill_new_shared_delete
+#define H5O_SHARED_DELETE		H5O__fill_new_shared_delete
 #undef H5O_SHARED_DELETE_REAL
 #undef H5O_SHARED_LINK
-#define H5O_SHARED_LINK			H5O_fill_new_shared_link
+#define H5O_SHARED_LINK			H5O__fill_new_shared_link
 #undef H5O_SHARED_LINK_REAL
 #undef H5O_SHARED_COPY_FILE
-#define H5O_SHARED_COPY_FILE		H5O_fill_new_shared_copy_file
+#define H5O_SHARED_COPY_FILE		H5O__fill_new_shared_copy_file
 #undef H5O_SHARED_COPY_FILE_REAL
 #undef H5O_SHARED_POST_COPY_FILE
 #define H5O_SHARED_POST_COPY_FILE	H5O_fill_new_shared_post_copy_file
@@ -101,58 +101,65 @@ static herr_t H5O_fill_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *s
 #undef H5O_SHARED_DEBUG
 #define H5O_SHARED_DEBUG		H5O_fill_new_shared_debug
 #undef H5O_SHARED_DEBUG_REAL
-#define H5O_SHARED_DEBUG_REAL		H5O_fill_debug
+#define H5O_SHARED_DEBUG_REAL		H5O__fill_debug
 #undef H5Oshared_H
 #include "H5Oshared.h"			/* Shared Object Header Message Callbacks */
 
 /* This message derives from H5O message class, for old fill value before version 1.5 */
 const H5O_msg_class_t H5O_MSG_FILL[1] = {{
-    H5O_FILL_ID,                /*message id number                     */
-    "fill",                     /*message name for debugging            */
-    sizeof(H5O_fill_t),		/*native message size                   */
-    H5O_SHARE_IS_SHARABLE|H5O_SHARE_IN_OHDR,	/* messages are sharable?       */
-    H5O_fill_shared_decode,	/*decode message                        */
-    H5O_fill_shared_encode,	/*encode message                        */
-    H5O_fill_copy,		/*copy the native value                 */
-    H5O_fill_shared_size,	/*raw message size			*/
-    H5O_fill_reset,		/*free internal memory			*/
-    H5O_fill_free,		/* free method				*/
-    H5O_fill_shared_delete,	/* file delete method			*/
-    H5O_fill_shared_link,	/* link method				*/
-    NULL,			/* set share method			*/
-    NULL,		    	/*can share method		*/
-    NULL,			/* pre copy native value to file	*/
-    H5O_fill_shared_copy_file,	/* copy native value to file		*/
-    H5O_fill_shared_post_copy_file,	/* post copy native value to file	*/
-    NULL,			/* get creation index		*/
-    NULL,			/* set creation index		*/
-    H5O_fill_shared_debug       /*debug the message			*/
+    H5O_FILL_ID,                /*message id number                         */
+    "fill",                     /*message name for debugging                */
+    sizeof(H5O_fill_t),         /*native message size                       */
+    H5O_SHARE_IS_SHARABLE|H5O_SHARE_IN_OHDR,    /* messages are sharable?   */
+    H5O_fill_shared_decode,     /*decode message                            */
+    H5O_fill_shared_encode,     /*encode message                            */
+    H5O_fill_copy,              /*copy the native value                     */
+    H5O_fill_shared_size,       /*raw message size                          */
+    H5O__fill_reset,            /*free internal memory                      */
+    H5O__fill_free,             /* free method                              */
+    H5O__fill_shared_delete,    /* file delete method                       */
+    H5O__fill_shared_link,      /* link method                              */
+    NULL,                       /* set share method                         */
+    NULL,                       /*can share method                          */
+    H5O__fill_pre_copy_file,    /* pre copy native value to file            */
+    H5O__fill_shared_copy_file, /* copy native value to file                */
+    H5O_fill_shared_post_copy_file, /* post copy native value to file       */
+    NULL,                       /* get creation index                       */
+    NULL,                       /* set creation index                       */
+    H5O_fill_shared_debug       /*debug the message                         */
 }};
 
 /* This message derives from H5O message class, for new fill value after version 1.4  */
 const H5O_msg_class_t H5O_MSG_FILL_NEW[1] = {{
-    H5O_FILL_NEW_ID,		/*message id number			*/
-    "fill_new", 		/*message name for debugging		*/
-    sizeof(H5O_fill_t),		/*native message size			*/
-    H5O_SHARE_IS_SHARABLE|H5O_SHARE_IN_OHDR,	/* messages are sharable?       */
-    H5O_fill_new_shared_decode,	/*decode message			*/
-    H5O_fill_new_shared_encode,	/*encode message			*/
-    H5O_fill_copy,		/*copy the native value			*/
-    H5O_fill_new_shared_size,	/*raw message size			*/
-    H5O_fill_reset,		/*free internal memory			*/
-    H5O_fill_free,		/* free method				*/
-    H5O_fill_new_shared_delete,	/* file delete method			*/
-    H5O_fill_new_shared_link,	/* link method				*/
-    NULL,			/* set share method			*/
-    NULL,		    	/*can share method		*/
-    NULL,			/* pre copy native value to file	*/
-    H5O_fill_new_shared_copy_file, /* copy native value to file		*/
-    H5O_fill_new_shared_post_copy_file,	/* post copy native value to file	*/
-    NULL,			/* get creation index		*/
-    NULL,			/* set creation index		*/
-    H5O_fill_new_shared_debug	/*debug the message			*/
+    H5O_FILL_NEW_ID,                    /*message id number                 */
+    "fill_new",                         /*message name for debugging        */
+    sizeof(H5O_fill_t),                 /*native message size               */
+    H5O_SHARE_IS_SHARABLE|H5O_SHARE_IN_OHDR,    /* messages are sharable?   */
+    H5O_fill_new_shared_decode,         /*decode message                    */
+    H5O_fill_new_shared_encode,         /*encode message                    */
+    H5O_fill_copy,                      /*copy the native value             */
+    H5O_fill_new_shared_size,           /*raw message size                  */
+    H5O__fill_reset,                    /*free internal memory              */
+    H5O__fill_free,                     /* free method                      */
+    H5O__fill_new_shared_delete,        /* file delete method               */
+    H5O__fill_new_shared_link,          /* link method                      */
+    NULL,                               /* set share method                 */
+    NULL,                               /*can share method                  */
+    H5O__fill_pre_copy_file,            /* pre copy native value to file    */
+    H5O__fill_new_shared_copy_file,      /* copy native value to file        */
+    H5O_fill_new_shared_post_copy_file, /* post copy native value to file   */
+    NULL,                               /* get creation index               */
+    NULL,                               /* set creation index               */
+    H5O_fill_new_shared_debug           /*debug the message	                */
 }};
 
+/* Format version bounds for fill value */
+const unsigned H5O_fill_ver_bounds[] = {
+    H5O_FILL_VERSION_1,     /* H5F_LIBVER_EARLIEST */
+    H5O_FILL_VERSION_2,     /* H5F_LIBVER_V18 */
+    H5O_FILL_VERSION_LATEST /* H5F_LIBVER_LATEST */
+};
+
 /* Masks, shift values & flags for fill value message */
 #define H5O_FILL_MASK_ALLOC_TIME        0x03
 #define H5O_FILL_SHIFT_ALLOC_TIME       0
@@ -173,11 +180,11 @@ H5FL_BLK_EXTERN(type_conv);
  * Function:	H5O_fill_new_decode
  *
  * Purpose:	Decode a new fill value message.  The new fill value
- * 		message is fill value plus space allocation time and
- * 		fill value writing time and whether fill value is defined.
+ *          message is fill value plus space allocation time and
+ *          fill value writing time and whether fill value is defined.
  *
- * Return:	Success:	Ptr to new message in native struct.
- *		Failure:	NULL
+ * Return:	Success:    Ptr to new message in native struct.
+ *          Failure:    NULL
  *
  * Programmer:  Raymond Lu
  *              Feb 26, 2002
@@ -185,8 +192,9 @@ H5FL_BLK_EXTERN(type_conv);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_fill_new_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_fill_new_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_fill_t	*fill = NULL;
     void *ret_value = NULL;     /* Return value */
@@ -197,7 +205,7 @@ H5O_fill_new_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t
     HDassert(p);
 
     if(NULL == (fill = H5FL_CALLOC(H5O_fill_t)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value message")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value message")
 
     /* Version */
     fill->version = *p++;
@@ -278,7 +286,7 @@ done:
     if(!ret_value && fill) {
         if(fill->buf)
             H5MM_xfree(fill->buf);
-	fill = H5FL_FREE(H5O_fill_t, fill);
+        fill = H5FL_FREE(H5O_fill_t, fill);
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -299,8 +307,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_fill_old_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_fill_old_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_fill_t *fill = NULL;	/* Decoded fill value message */
     void *ret_value = NULL;     /* Return value */
@@ -338,7 +347,7 @@ done:
     if(!ret_value && fill) {
         if(fill->buf)
             H5MM_xfree(fill->buf);
-	fill = H5FL_FREE(H5O_fill_t, fill);
+        fill = H5FL_FREE(H5O_fill_t, fill);
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -349,8 +358,8 @@ done:
  * Function:	H5O_fill_new_encode
  *
  * Purpose:	Encode a new fill value message.  The new fill value
- *              message is fill value plus space allocation time and
- *              fill value writing time and whether fill value is defined.
+ *          message is fill value plus space allocation time and
+ *          fill value writing time and whether fill value is defined.
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -483,7 +492,7 @@ H5O_fill_old_encode(H5F_t H5_ATTR_UNUSED *f, uint8_t *p, const void *_fill)
  *		whether fill value is defined.
  *
  * Return:	Success:	Ptr to _DEST
- *		Failure:	NULL
+ *		    Failure:	NULL
  *
  * Programmer:  Raymond Lu
  *              Feb 26, 2002
@@ -493,16 +502,16 @@ H5O_fill_old_encode(H5F_t H5_ATTR_UNUSED *f, uint8_t *p, const void *_fill)
 static void *
 H5O_fill_copy(const void *_src, void *_dst)
 {
-    const H5O_fill_t	*src = (const H5O_fill_t *)_src;
-    H5O_fill_t		*dst = (H5O_fill_t *)_dst;
-    void		*ret_value = NULL;      /* Return value */
+    const H5O_fill_t    *src = (const H5O_fill_t *)_src;
+    H5O_fill_t          *dst = (H5O_fill_t *)_dst;
+    void                *ret_value = NULL;      /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
     HDassert(src);
 
     if(!dst && NULL == (dst = H5FL_MALLOC(H5O_fill_t)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill message")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill message")
 
     /* Shallow copy basic fields */
     *dst = *src;
@@ -518,16 +527,16 @@ H5O_fill_copy(const void *_src, void *_dst)
     /* Copy fill value and its size */
     if(src->buf) {
         H5_CHECK_OVERFLOW(src->size, ssize_t, size_t);
-	if(NULL == (dst->buf = H5MM_malloc((size_t)src->size)))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value")
-	HDmemcpy(dst->buf, src->buf, (size_t)src->size);
+        if(NULL == (dst->buf = H5MM_malloc((size_t)src->size)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value")
+        HDmemcpy(dst->buf, src->buf, (size_t)src->size);
 
         /* Check for needing to convert/copy fill value */
         if(src->type) {
             H5T_path_t *tpath;      /* Conversion information */
 
             /* Set up type conversion function */
-            if(NULL == (tpath = H5T_path_find(src->type, dst->type, NULL, NULL, H5AC_noio_dxpl_id, FALSE)))
+            if(NULL == (tpath = H5T_path_find(src->type, dst->type)))
                 HGOTO_ERROR(H5E_OHDR, H5E_UNSUPPORTED, NULL, "unable to convert between src and dst data types")
 
             /* If necessary, convert fill value datatypes (which copies VL components, etc.) */
@@ -555,7 +564,7 @@ H5O_fill_copy(const void *_src, void *_dst)
                 } /* end if */
 
                 /* Convert fill value */
-                if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, dst->buf, bkg_buf, H5AC_noio_dxpl_id) < 0) {
+                if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, dst->buf, bkg_buf) < 0) {
                     H5I_dec_ref(src_id);
                     H5I_dec_ref(dst_id);
                     if(bkg_buf)
@@ -581,9 +590,9 @@ done:
     if(!ret_value && dst) {
         if(dst->buf)
             H5MM_xfree(dst->buf);
-	if(dst->type)
-            H5T_close(dst->type);
-	if(!_dst)
+        if(dst->type)
+            (void)H5T_close_real(dst->type);
+        if(!_dst)
             dst = H5FL_FREE(H5O_fill_t, dst);
     } /* end if */
 
@@ -595,13 +604,13 @@ done:
  * Function:	H5O_fill_new_size
  *
  * Purpose:	Returns the size of the raw message in bytes not counting the
- *		message type or size fields, but only the data fields.  This
- *		function doesn't take into account alignment.  The new fill
- *		value message is fill value plus space allocation time and
- *              fill value writing time and whether fill value is defined.
+ *          message type or size fields, but only the data fields.  This
+ *          function doesn't take into account alignment.  The new fill
+ *          value message is fill value plus space allocation time and
+ *          fill value writing time and whether fill value is defined.
  *
  * Return:	Success:	Message data size in bytes w/o alignment.
- *		Failure:	0
+ *          Failure:	0
  *
  * Programmer:  Raymond Lu
  *              Feb 26, 2002
@@ -611,8 +620,8 @@ done:
 static size_t
 H5O_fill_new_size(const H5F_t H5_ATTR_UNUSED *f, const void *_fill)
 {
-    const H5O_fill_t	*fill = (const H5O_fill_t *)_fill;
-    size_t		ret_value = 0;          /* Return value */
+    const H5O_fill_t    *fill = (const H5O_fill_t *)_fill;
+    size_t              ret_value = 0;          /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -700,7 +709,7 @@ H5O_fill_reset_dyn(H5O_fill_t *fill)
             if(NULL == (fill_type = H5T_copy(fill->type, H5T_COPY_TRANSIENT)))
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to copy fill value datatype")
             if((fill_type_id = H5I_register(H5I_DATATYPE, fill_type, FALSE)) < 0) {
-                H5T_close(fill_type);
+                (void)H5T_close_real(fill_type);
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTREGISTER, FAIL, "unable to register fill value datatype")
             } /* end if */
 
@@ -709,7 +718,7 @@ H5O_fill_reset_dyn(H5O_fill_t *fill)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create scalar dataspace")
 
             /* Reclaim any variable length components of the fill value */
-            if(H5D_vlen_reclaim(fill_type_id, fill_space, H5AC_noio_dxpl_id, fill->buf) < 0) {
+            if(H5D_vlen_reclaim(fill_type_id, fill_space, fill->buf) < 0) {
                 H5S_close(fill_space);
                 HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "unable to reclaim variable-length fill value data")
             } /* end if */
@@ -723,7 +732,7 @@ H5O_fill_reset_dyn(H5O_fill_t *fill)
     } /* end if */
     fill->size = 0;
     if(fill->type) {
-	H5T_close(fill->type);
+	(void)H5T_close_real(fill->type);
 	fill->type = NULL;
     } /* end if */
 
@@ -736,7 +745,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_fill_reset
+ * Function:	H5O__fill_reset
  *
  * Purpose:	Resets a message to an initial state.
  *
@@ -748,11 +757,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_fill_reset(void *_fill)
+H5O__fill_reset(void *_fill)
 {
     H5O_fill_t	*fill = (H5O_fill_t *)_fill;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(fill);
 
@@ -765,11 +774,11 @@ H5O_fill_reset(void *_fill)
     fill->fill_defined = FALSE;
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_fill_reset() */
+} /* end H5O__fill_reset() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_fill_free
+ * Function:	H5O__fill_free
  *
  * Purpose:	Frees the message
  *
@@ -781,20 +790,56 @@ H5O_fill_reset(void *_fill)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_fill_free(void *fill)
+H5O__fill_free(void *fill)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(fill);
 
     fill = H5FL_FREE(H5O_fill_t, fill);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_fill_free() */
+} /* end H5O__fill_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_fill_debug
+ * Function:    H5O__fill_pre_copy_file
+ *
+ * Purpose:     Perform any necessary actions before copying message between
+ *              files.
+ *
+ * Return:      Success:        Non-negative
+ *              Failure:        Negative
+ *
+ * Programmer:  Vailin Choi; Dec 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__fill_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void *mesg_src,
+    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t *cpy_info, void H5_ATTR_UNUSED *udata)
+{
+    const H5O_fill_t	*fill_src = (const H5O_fill_t *)mesg_src;   /* Source fill value */
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* check args */
+    HDassert(cpy_info);
+    HDassert(cpy_info->file_dst);
+
+    /* Check to ensure that the version of the message to be copied does not exceed
+       the message version allowed by the destination file's high bound */
+    if(fill_src->version > H5O_fill_ver_bounds[H5F_HIGH_BOUND(cpy_info->file_dst)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "fill value message version out of bounds")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__fill_pre_copy_file() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__fill_debug
  *
  * Purpose:	Prints debugging info for the message.
  *
@@ -806,13 +851,13 @@ H5O_fill_free(void *fill)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_fill_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_fill, FILE *stream,
-	       int indent, int fwidth)
+H5O__fill_debug(H5F_t H5_ATTR_UNUSED *f, const void *_fill, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_fill_t *fill = (const H5O_fill_t *)_fill;
     H5D_fill_value_t fill_status;       /* Whether the fill value is defined */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(f);
     HDassert(fill);
@@ -885,23 +930,23 @@ H5O_fill_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
 	      "Size:", fill->size);
     HDfprintf(stream, "%*s%-*s ", indent, "", fwidth, "Data type:");
     if(fill->type) {
-	H5T_debug(fill->type, stream);
-	fprintf(stream, "\n");
+        H5T_debug(fill->type, stream);
+        HDfprintf(stream, "\n");
     } /* end if */
     else
-	fprintf(stream, "<dataset type>\n");
+        HDfprintf(stream, "<dataset type>\n");
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_fill_debug() */
+} /* end H5O__fill_debug() */
 
 
 /*-------------------------------------------------------------------------
  * Function:	H5O_fill_convert
  *
  * Purpose:	Convert a fill value from whatever data type it currently has
- *		to the specified dataset type.  The `type' field of the fill
- *		value struct will be set to NULL to indicate that it has the
- *		same type as the dataset.
+ *          to the specified dataset type.  The `type' field of the fill
+ *          value struct will be set to NULL to indicate that it has the
+ *          same type as the dataset.
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -911,7 +956,7 @@ H5O_fill_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_fill_convert(H5O_fill_t *fill, H5T_t *dset_type, hbool_t *fill_changed, hid_t dxpl_id)
+H5O_fill_convert(H5O_fill_t *fill, H5T_t *dset_type, hbool_t *fill_changed)
 {
     H5T_path_t		*tpath;			    /* Type conversion info	*/
     void		*buf = NULL, *bkg = NULL;   /* Conversion buffers	*/
@@ -927,20 +972,20 @@ H5O_fill_convert(H5O_fill_t *fill, H5T_t *dset_type, hbool_t *fill_changed, hid_
     /* No-op cases */
     if(!fill->buf || !fill->type || 0 == H5T_cmp(fill->type, dset_type, FALSE)) {
         /* Don't need datatype for fill value */
-	if(fill->type)
-            H5T_close(fill->type);
-	fill->type = NULL;
+        if(fill->type)
+            (void)H5T_close_real(fill->type);
+        fill->type = NULL;
 
         /* Note that the fill value info has changed */
         *fill_changed = TRUE;
 
-	HGOTO_DONE(SUCCEED);
+        HGOTO_DONE(SUCCEED);
     } /* end if */
 
     /*
      * Can we convert between source and destination data types?
      */
-    if(NULL == (tpath = H5T_path_find(fill->type, dset_type, NULL, NULL, dxpl_id, FALSE)))
+    if(NULL == (tpath = H5T_path_find(fill->type, dset_type)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to convert between src and dst datatypes")
 
     /* Don't bother doing anything if there will be no actual conversion */
@@ -967,16 +1012,16 @@ H5O_fill_convert(H5O_fill_t *fill, H5T_t *dset_type, hbool_t *fill_changed, hid_
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for type conversion")
 
         /* Do the conversion */
-        if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, buf, bkg, dxpl_id) < 0)
+        if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, buf, bkg) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
         /* Update the fill message */
         if(buf != fill->buf) {
-            H5T_vlen_reclaim_elmt(fill->buf, fill->type, dxpl_id);
+            H5T_vlen_reclaim_elmt(fill->buf, fill->type);
             H5MM_xfree(fill->buf);
             fill->buf = buf;
         } /* end if */
-        H5T_close(fill->type);
+        (void)H5T_close_real(fill->type);
         fill->type = NULL;
         H5_CHECKED_ASSIGN(fill->size, ssize_t, H5T_get_size(dset_type), size_t);
 
@@ -999,28 +1044,39 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_fill_set_latest_version
+ * Function:    H5O_fill_set_version
  *
- * Purpose:     Set the encoding for a fill value to the latest version.
+ * Purpose:     Set the version to encode a fill value with.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:  Quincey Koziol
- *              Tuesday, July 24, 2007
+ * Programmer:  Vailin Choi; December 2017
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_fill_set_latest_version(H5O_fill_t *fill)
+H5O_fill_set_version(H5F_t *f, H5O_fill_t *fill)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    unsigned version;           /* Message version */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity check */
+    HDassert(f);
     HDassert(fill);
 
-    /* Set encoding of fill value to latest version */
-    fill->version = H5O_FILL_VERSION_LATEST;
+    /* Upgrade to the version indicated by the file's low bound if higher */
+    version = MAX(fill->version, H5O_fill_ver_bounds[H5F_LOW_BOUND(f)]);
 
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_fill_set_latest_version() */
+    /* Version bounds check */
+    if(version > H5O_fill_ver_bounds[H5F_HIGH_BOUND(f)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "Filter pipeline version out of bounds")
+
+    /* Set the message version */
+    fill->version = version;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_fill_set_version() */
 
diff --git a/src/H5Oflush.c b/src/H5Oflush.c
index e399c6c..e8e077e 100644
--- a/src/H5Oflush.c
+++ b/src/H5Oflush.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -35,17 +33,24 @@
 /***********/
 
 #include "H5private.h"      /* Generic Functions */
+#include "H5CXprivate.h"    /* API Contexts */
 #include "H5Dprivate.h"     /* Datasets */
 #include "H5Eprivate.h"     /* Errors   */
 #include "H5Fprivate.h"     /* Files    */
-#include "H5Gprivate.h"        /* Groups    */
-#include "H5Iprivate.h"        /* IDs    */
+#include "H5Gprivate.h"     /* Groups   */
+#include "H5Iprivate.h"     /* IDs      */
 #include "H5Opkg.h"         /* Objects  */
 
+
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5O_oh_tag(const H5O_loc_t *oloc, hid_t dxpl_id, haddr_t *tag);
+static herr_t H5O__flush(hid_t obj_id);
+static herr_t H5O__oh_tag(const H5O_loc_t *oloc, haddr_t *tag);
+static herr_t H5O__refresh_metadata_close(hid_t oid, H5O_loc_t oloc,
+	H5G_loc_t *obj_loc);
+static herr_t H5O__refresh(hid_t obj_id);
+
 
 /*************/
 /* Functions */
@@ -68,38 +73,24 @@ static herr_t H5O_oh_tag(const H5O_loc_t *oloc, hid_t dxpl_id, haddr_t *tag);
 herr_t
 H5Oflush(hid_t obj_id)
 {
-    H5O_loc_t *oloc;            /* object location */
-    void *obj_ptr;		/* Pointer to object */
-    const H5O_obj_class_t  *obj_class = NULL;       /* Class of object */
-    herr_t ret_value = SUCCEED; /* return value */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", obj_id);
 
-    /* Check args */
-    if(NULL == (oloc = H5O_get_loc(obj_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an object")
-
-    /* Get the object pointer */
-    if(NULL == (obj_ptr = H5I_object(obj_id)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid object identifier")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(obj_id) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Get the object class */
-    if(NULL == (obj_class = H5O_obj_class(oloc, H5AC_ind_read_dxpl_id)))
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object class")
-
-    /* Flush the object of this class */
-    if(obj_class->flush && obj_class->flush(obj_ptr, H5AC_ind_read_dxpl_id) < 0)
+    /* Call internal routine */
+    if(H5O__flush(obj_id) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to flush object")
 
-    /* Flush the object metadata and invoke flush callback */
-    if(H5O_flush_common(oloc, obj_id, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to flush object and object flush callback")
-
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Oflush() */
 
+
 /*-------------------------------------------------------------------------
  * Function:    H5O_flush_common
  *
@@ -113,7 +104,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_flush_common(H5O_loc_t *oloc, hid_t obj_id, hid_t dxpl_id)
+H5O_flush_common(H5O_loc_t *oloc, hid_t obj_id)
 {
     haddr_t 	tag = 0;
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -121,11 +112,11 @@ H5O_flush_common(H5O_loc_t *oloc, hid_t obj_id, hid_t dxpl_id)
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Retrieve tag for object */
-    if(H5O_oh_tag(oloc, dxpl_id, &tag) < 0)
+    if(H5O__oh_tag(oloc, &tag) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to flush object metadata")
 
     /* Flush metadata based on tag value of the object */
-    if(H5F_flush_tagged_metadata(oloc->file, tag, dxpl_id) < 0)
+    if(H5F_flush_tagged_metadata(oloc->file, tag) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush tagged metadata")
 
     /* Check to invoke callback */
@@ -138,7 +129,58 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_oh_tag
+ * Function:    H5O__flush
+ *
+ * Purpose:     Internal routine to flush an object
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 29, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__flush(hid_t obj_id)
+{
+    H5O_loc_t *oloc;            /* Object location */
+    void *obj_ptr;		/* Pointer to object */
+    const H5O_obj_class_t  *obj_class;	/* Class of object */
+    herr_t ret_value = SUCCEED;	/* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check args */
+    if(NULL == (oloc = H5O_get_loc(obj_id)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an object")
+
+    /* Get the object pointer */
+    if(NULL == (obj_ptr = H5I_object(obj_id)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "invalid object identifier")
+
+    /* Get the object class */
+    if(NULL == (obj_class = H5O__obj_class(oloc)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object class")
+
+    /* Flush the object of this class */
+    if(obj_class->flush && obj_class->flush(obj_ptr) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to flush object")
+
+    /* Flush the object metadata and invoke flush callback */
+    if(H5O_flush_common(oloc, obj_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTFLUSH, FAIL, "unable to flush object and object flush callback")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__flush() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__oh_tag
  *
  * Purpose:     Get object header's address--tag value for the object
  *
@@ -151,18 +193,18 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_oh_tag(const H5O_loc_t *oloc, hid_t dxpl_id, haddr_t *tag)
+H5O__oh_tag(const H5O_loc_t *oloc, haddr_t *tag)
 {
     H5O_t       *oh = NULL;             /* Object header */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC
 
     /* Check args */
     HDassert(oloc);
 
     /* Get object header for object */
-    if(NULL == (oh = H5O_protect(oloc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(oloc, H5AC__READ_ONLY_FLAG, FALSE)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object's object header")
 
     /* Get object header's address (i.e. the tag value for this object) */
@@ -171,11 +213,11 @@ H5O_oh_tag(const H5O_loc_t *oloc, hid_t dxpl_id, haddr_t *tag)
 
 done:
     /* Unprotect object header on failure */
-    if(oh && H5O_unprotect(oloc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(oloc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_oh_tag() */
+} /* end H5O__oh_tag() */
 
 
 /*-------------------------------------------------------------------------
@@ -193,18 +235,17 @@ done:
 herr_t
 H5Orefresh(hid_t oid)
 {
-    H5O_loc_t *oloc;            /* object location */
-    herr_t ret_value = SUCCEED; /* return value */
+    herr_t ret_value = SUCCEED;		/* Return value */
     
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "i", oid);
 
-    /* Check args */
-    if(NULL == (oloc = H5O_get_loc(oid)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an object")
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(oid) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
 
-    /* Private function */
-    if(H5O_refresh_metadata(oid, *oloc, H5AC_ind_read_dxpl_id) < 0)
+    /* Call internal routine */
+    if(H5O__refresh(oid) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to refresh object")
 
 done:
@@ -233,7 +274,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_refresh_metadata(hid_t oid, H5O_loc_t oloc, hid_t dxpl_id)
+H5O_refresh_metadata(hid_t oid, H5O_loc_t oloc)
 {
     hbool_t objs_incr = FALSE;          /* Whether the object count in the file was incremented */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -258,11 +299,11 @@ H5O_refresh_metadata(hid_t oid, H5O_loc_t oloc, hid_t dxpl_id)
         objs_incr = TRUE;
 
         /* Close object & evict its metadata */
-        if((H5O_refresh_metadata_close(oid, oloc, &obj_loc, dxpl_id)) < 0)
+        if((H5O__refresh_metadata_close(oid, oloc, &obj_loc)) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to refresh object")
 
         /* Re-open the object, re-fetching its metadata */
-        if((H5O_refresh_metadata_reopen(oid, &obj_loc, dxpl_id, FALSE)) < 0)
+        if((H5O_refresh_metadata_reopen(oid, &obj_loc, FALSE)) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to refresh object")
     } /* end if */
 
@@ -275,7 +316,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_refresh_metadata_close
+ * Function:    H5O__refresh_metadata_close
  *
  * Purpose:     This is the first part of the original routine H5O_refresh_metadata().
  *		(1) Save object location information.
@@ -293,14 +334,14 @@ done:
  *
  *-------------------------------------------------------------------------
  */
-herr_t
-H5O_refresh_metadata_close(hid_t oid, H5O_loc_t oloc, H5G_loc_t *obj_loc, hid_t dxpl_id)
+static herr_t
+H5O__refresh_metadata_close(hid_t oid, H5O_loc_t oloc, H5G_loc_t *obj_loc)
 {
     haddr_t tag = 0;            /* Tag for object */
     hbool_t corked = FALSE;     /* Whether object's metadata is corked */
     herr_t ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC
     
     /* Make deep local copy of object's location information */
     if(obj_loc) {
@@ -312,11 +353,11 @@ H5O_refresh_metadata_close(hid_t oid, H5O_loc_t oloc, H5G_loc_t *obj_loc, hid_t
 
     /* Get object's type */
     if(H5I_get_type(oid) == H5I_DATASET)
-	if(H5D_mult_refresh_close(oid, dxpl_id) < 0)
+	if(H5D_mult_refresh_close(oid) < 0)
 	    HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to prepare refresh for dataset")
 
     /* Retrieve tag for object */
-    if(H5O_oh_tag(&oloc, dxpl_id, &tag) < 0)
+    if(H5O__oh_tag(&oloc, &tag) < 0)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTFLUSH, FAIL, "unable to get object header address")
 
     /* Get cork status of the object with tag */
@@ -328,11 +369,11 @@ H5O_refresh_metadata_close(hid_t oid, H5O_loc_t oloc, H5G_loc_t *obj_loc, hid_t
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to close object")
 
     /* Flush metadata based on tag value of the object */
-    if(H5F_flush_tagged_metadata(oloc.file, tag, dxpl_id) < 0)
+    if(H5F_flush_tagged_metadata(oloc.file, tag) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to flush tagged metadata")
 
     /* Evict the object's tagged metadata */
-    if(H5F_evict_tagged_metadata(oloc.file, tag, dxpl_id) < 0)
+    if(H5F_evict_tagged_metadata(oloc.file, tag) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_CANTFLUSH, FAIL, "unable to evict metadata")
 
     /* Re-cork object with tag */
@@ -342,7 +383,7 @@ H5O_refresh_metadata_close(hid_t oid, H5O_loc_t oloc, H5G_loc_t *obj_loc, hid_t
 
 done:
     FUNC_LEAVE_NOAPI(ret_value);
-} /* end H5O_refresh_metadata_close() */
+} /* end H5O__refresh_metadata_close() */
 
 
 /*-------------------------------------------------------------------------
@@ -360,7 +401,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_refresh_metadata_reopen(hid_t oid, H5G_loc_t *obj_loc, hid_t dxpl_id, hbool_t start_swmr)
+H5O_refresh_metadata_reopen(hid_t oid, H5G_loc_t *obj_loc, hbool_t start_swmr)
 {
     void *object = NULL;        /* Dataset for this operation */
     H5I_type_t type;            /* Type of object for the ID */
@@ -372,42 +413,42 @@ H5O_refresh_metadata_reopen(hid_t oid, H5G_loc_t *obj_loc, hid_t dxpl_id, hbool_
     type = H5I_get_type(oid);
 
     switch(type) {
-        case(H5I_GROUP):
+        case H5I_GROUP:
             /* Re-open the group */
-            if(NULL == (object = H5G_open(obj_loc, dxpl_id)))
+            if(NULL == (object = H5G_open(obj_loc)))
                 HGOTO_ERROR(H5E_SYM, H5E_CANTOPENOBJ, FAIL, "unable to open group")
             break;
 
-        case(H5I_DATATYPE):
+        case H5I_DATATYPE:
             /* Re-open the named datatype */
-            if(NULL == (object = H5T_open(obj_loc, dxpl_id)))
+            if(NULL == (object = H5T_open(obj_loc)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, FAIL, "unable to open named datatype")
             break;
 
-        case(H5I_DATASET):
+        case H5I_DATASET:
             /* Re-open the dataset */
-            if(NULL == (object = H5D_open(obj_loc, H5P_DATASET_ACCESS_DEFAULT, dxpl_id)))
+            if(NULL == (object = H5D_open(obj_loc, H5P_DATASET_ACCESS_DEFAULT)))
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to open dataset")
-	    if(!start_swmr) /* No need to handle multiple opens when H5Fstart_swmr_write() */
-		if(H5D_mult_refresh_reopen((H5D_t *)object, dxpl_id) < 0)
-		    HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to finish refresh for dataset")
+            if(!start_swmr) /* No need to handle multiple opens when H5Fstart_swmr_write() */
+                if(H5D_mult_refresh_reopen((H5D_t *)object) < 0)
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTOPENOBJ, FAIL, "unable to finish refresh for dataset")
             break;
 
-        case(H5I_UNINIT):
-        case(H5I_BADID):
-        case(H5I_FILE):
-        case(H5I_DATASPACE):
-        case(H5I_ATTR):
-        case(H5I_REFERENCE):
-        case(H5I_VFL):
-        case(H5I_GENPROP_CLS):
-        case(H5I_GENPROP_LST):
-        case(H5I_ERROR_CLASS):
-        case(H5I_ERROR_MSG):
-        case(H5I_ERROR_STACK):
-        case(H5I_NTYPES):
+        case H5I_UNINIT:
+        case H5I_BADID:
+        case H5I_FILE:
+        case H5I_DATASPACE:
+        case H5I_ATTR:
+        case H5I_REFERENCE:
+        case H5I_VFL:
+        case H5I_GENPROP_CLS:
+        case H5I_GENPROP_LST:
+        case H5I_ERROR_CLASS:
+        case H5I_ERROR_MSG:
+        case H5I_ERROR_STACK:
+        case H5I_NTYPES:
         default:
-            HGOTO_ERROR(H5E_ARGS, H5E_CANTRELEASE, FAIL, "not a valid file object ID (dataset, group, or datatype)")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a valid file object ID (dataset, group, or datatype)")
         break;
     } /* end switch */
 
@@ -419,3 +460,40 @@ done:
     FUNC_LEAVE_NOAPI(ret_value);
 } /* end H5O_refresh_metadata_reopen() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__refresh
+ *
+ * Purpose:     Internal routine to refresh an object
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 29, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__refresh(hid_t obj_id)
+{
+    H5O_loc_t *oloc;            /* Object location */
+    herr_t ret_value = SUCCEED;	/* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Check args */
+    if(NULL == (oloc = H5O_get_loc(obj_id)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an object")
+
+    /* Private function */
+    if(H5O_refresh_metadata(obj_id, *oloc) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to refresh object")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__refresh() */
+
diff --git a/src/H5Ofsinfo.c b/src/H5Ofsinfo.c
index 37ec627..bb15f62 100644
--- a/src/H5Ofsinfo.c
+++ b/src/H5Ofsinfo.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -34,13 +32,14 @@
 #include "H5Opkg.h"             /* Object headers	*/
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_fsinfo_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O_fsinfo_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+        unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_fsinfo_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_fsinfo_copy(const void *_mesg, void *_dest);
 static size_t H5O_fsinfo_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_fsinfo_free(void *mesg);
-static herr_t H5O_fsinfo_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-    FILE * stream, int indent, int fwidth);
+static herr_t H5O__fsinfo_free(void *mesg);
+static herr_t H5O__fsinfo_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_FSINFO[1] = {{
@@ -53,7 +52,7 @@ const H5O_msg_class_t H5O_MSG_FSINFO[1] = {{
     H5O_fsinfo_copy,          	/* copy the native value         	*/
     H5O_fsinfo_size,          	/* size of free-space manager info message */
     NULL,                   	/* default reset method         	*/
-    H5O_fsinfo_free,	        /* free method				*/
+    H5O__fsinfo_free,	        /* free method				*/
     NULL,        		/* file delete method			*/
     NULL,			/* link method				*/
     NULL,			/* set share method			*/
@@ -63,7 +62,7 @@ const H5O_msg_class_t H5O_MSG_FSINFO[1] = {{
     NULL,			/* post copy native value to file	*/
     NULL,			/* get creation index			*/
     NULL,			/* set creation index			*/
-    H5O_fsinfo_debug          	/* debug the message            	*/
+    H5O__fsinfo_debug          	/* debug the message            	*/
 }};
 
 /* Current version of free-space manager info information */
@@ -87,8 +86,9 @@ H5FL_DEFINE_STATIC(H5O_fsinfo_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_fsinfo_decode(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_fsinfo_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_fsinfo_t    *fsinfo = NULL;     /* File space info message */
     H5F_mem_page_t  ptype;              /* Memory type for iteration */
@@ -309,9 +309,9 @@ H5O_fsinfo_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const voi
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_fsinfo_free
+ * Function:    H5O__fsinfo_free
  *
- * Purpose:     Free's the message
+ * Purpose:     Frees the message
  *
  * Return:      Non-negative on success/Negative on failure
  *
@@ -320,20 +320,20 @@ H5O_fsinfo_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const voi
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_fsinfo_free(void *mesg)
+H5O__fsinfo_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_fsinfo_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_fsinfo_free() */
+} /* end H5O__fsinfo_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_fsinfo_debug
+ * Function:    H5O__fsinfo_debug
  *
  * Purpose:     Prints debugging info for a message.
  *
@@ -344,13 +344,13 @@ H5O_fsinfo_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_fsinfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__fsinfo_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth)
 {
     const H5O_fsinfo_t	*fsinfo = (const H5O_fsinfo_t *) _mesg;
     H5F_mem_page_t  ptype;      /* Free-space types for iteration */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -404,5 +404,5 @@ H5O_fsinfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const vo
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_fsinfo_debug() */
+} /* end H5O__fsinfo_debug() */
 
diff --git a/src/H5Oginfo.c b/src/H5Oginfo.c
index 9cd0dc1..b75a9c5 100644
--- a/src/H5Oginfo.c
+++ b/src/H5Oginfo.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -34,14 +32,14 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_ginfo_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O_ginfo_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_ginfo_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_ginfo_copy(const void *_mesg, void *_dest);
 static size_t H5O_ginfo_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_ginfo_free(void *_mesg);
-static herr_t H5O_ginfo_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-			     FILE * stream, int indent, int fwidth);
+static herr_t H5O__ginfo_free(void *_mesg);
+static herr_t H5O__ginfo_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_GINFO[1] = {{
@@ -54,7 +52,7 @@ const H5O_msg_class_t H5O_MSG_GINFO[1] = {{
     H5O_ginfo_copy,          	/*copy the native value         */
     H5O_ginfo_size,          	/*size of symbol table entry    */
     NULL,                   	/*default reset method          */
-    H5O_ginfo_free,	        /* free method			*/
+    H5O__ginfo_free,	        /* free method			*/
     NULL,	        	/* file delete method		*/
     NULL,			/* link method			*/
     NULL, 			/*set share method		*/
@@ -64,7 +62,7 @@ const H5O_msg_class_t H5O_MSG_GINFO[1] = {{
     NULL,			/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_ginfo_debug          	/*debug the message             */
+    H5O__ginfo_debug          	/*debug the message             */
 }};
 
 /* Current version of group info information */
@@ -96,8 +94,9 @@ H5FL_DEFINE_STATIC(H5O_ginfo_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_ginfo_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O_ginfo_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_ginfo_t         *ginfo = NULL;  /* Pointer to group information message */
     unsigned char       flags;          /* Flags for encoding group info */
@@ -287,9 +286,9 @@ H5O_ginfo_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_sha
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_ginfo_free
+ * Function:	H5O__ginfo_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -299,7 +298,7 @@ H5O_ginfo_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_sha
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_ginfo_free(void *mesg)
+H5O__ginfo_free(void *mesg)
 {
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -308,11 +307,11 @@ H5O_ginfo_free(void *mesg)
     mesg = H5FL_FREE(H5O_ginfo_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_ginfo_free() */
+} /* end H5O__ginfo_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_ginfo_debug
+ * Function:    H5O__ginfo_debug
  *
  * Purpose:     Prints debugging info for a message.
  *
@@ -325,12 +324,12 @@ H5O_ginfo_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_ginfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__ginfo_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_ginfo_t       *ginfo = (const H5O_ginfo_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -349,5 +348,5 @@ H5O_ginfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const voi
 	      "Estimated length of object in group's name:", ginfo->est_name_len);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_ginfo_debug() */
+} /* end H5O__ginfo_debug() */
 
diff --git a/src/H5Oint.c b/src/H5Oint.c
new file mode 100644
index 0000000..c9e82c0
--- /dev/null
+++ b/src/H5Oint.c
@@ -0,0 +1,3174 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*-------------------------------------------------------------------------
+ *
+ * Created:     H5O.c
+ *
+ * Purpose:     Internal object header routines
+ *
+ *-------------------------------------------------------------------------
+ */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5Omodule.h"          /* This source code file is part of the H5O module */
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Fprivate.h"         /* File access                              */
+#include "H5FLprivate.h"        /* Free lists                               */
+#include "H5FOprivate.h"        /* File objects                             */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Lprivate.h"         /* Links                                    */
+#include "H5MFprivate.h"        /* File memory management                   */
+#ifdef H5O_ENABLE_BOGUS
+#include "H5MMprivate.h"        /* Memory management                        */
+#endif /* H5O_ENABLE_BOGUS */
+#include "H5Opkg.h"             /* Object headers                           */
+#include "H5SMprivate.h"        /* Shared object header messages            */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/* User data for recursive traversal over objects from a group */
+typedef struct {
+    hid_t       obj_id;         /* The ID for the starting group */
+    H5G_loc_t	*start_loc;     /* Location of starting group */
+    H5SL_t     *visited;        /* Skip list for tracking visited nodes */
+    H5O_iterate_t op;           /* Application callback */
+    void       *op_data;        /* Application's op data */
+} H5O_iter_visit_ud_t;
+
+
+/********************/
+/* Package Typedefs */
+/********************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static herr_t H5O__delete_oh(H5F_t *f, H5O_t *oh);
+static herr_t H5O__obj_type_real(const H5O_t *oh, H5O_type_t *obj_type);
+static herr_t H5O__get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr);
+static herr_t H5O__free_visit_visited(void *item, void *key,
+    void *operator_data/*in,out*/);
+static herr_t H5O__visit_cb(hid_t group, const char *name, const H5L_info_t *linfo,
+    void *_udata);
+static const H5O_obj_class_t *H5O__obj_class_real(const H5O_t *oh);
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Package initialization variable */
+hbool_t H5_PKG_INIT_VAR = FALSE;
+
+/* Header message ID to class mapping
+ *
+ * Remember to increment H5O_MSG_TYPES in H5Opkg.h when adding a new
+ * message.
+ */
+const H5O_msg_class_t *const H5O_msg_class_g[] = {
+    H5O_MSG_NULL,		/*0x0000 Null				*/
+    H5O_MSG_SDSPACE,		/*0x0001 Dataspace			*/
+    H5O_MSG_LINFO,		/*0x0002 Link information		*/
+    H5O_MSG_DTYPE,		/*0x0003 Datatype			*/
+    H5O_MSG_FILL,       	/*0x0004 Old data storage -- fill value */
+    H5O_MSG_FILL_NEW,		/*0x0005 New data storage -- fill value */
+    H5O_MSG_LINK,		/*0x0006 Link 				*/
+    H5O_MSG_EFL,		/*0x0007 Data storage -- external data files */
+    H5O_MSG_LAYOUT,		/*0x0008 Data Layout			*/
+#ifdef H5O_ENABLE_BOGUS
+    H5O_MSG_BOGUS_VALID,	/*0x0009 "Bogus valid" (for testing)	*/
+#else /* H5O_ENABLE_BOGUS */
+    NULL,			/*0x0009 "Bogus valid" (for testing)	*/
+#endif /* H5O_ENABLE_BOGUS */
+    H5O_MSG_GINFO,		/*0x000A Group information		*/
+    H5O_MSG_PLINE,		/*0x000B Data storage -- filter pipeline */
+    H5O_MSG_ATTR,		/*0x000C Attribute			*/
+    H5O_MSG_NAME,		/*0x000D Object name			*/
+    H5O_MSG_MTIME,		/*0x000E Object modification date and time */
+    H5O_MSG_SHMESG,		/*0x000F File-wide shared message table */
+    H5O_MSG_CONT,		/*0x0010 Object header continuation	*/
+    H5O_MSG_STAB,		/*0x0011 Symbol table			*/
+    H5O_MSG_MTIME_NEW,		/*0x0012 New Object modification date and time */
+    H5O_MSG_BTREEK,		/*0x0013 Non-default v1 B-tree 'K' values */
+    H5O_MSG_DRVINFO,		/*0x0014 Driver info settings		*/
+    H5O_MSG_AINFO,		/*0x0015 Attribute information		*/
+    H5O_MSG_REFCOUNT,		/*0x0016 Object's ref. count		*/
+    H5O_MSG_FSINFO,		/*0x0017 Free-space manager info        */
+    H5O_MSG_MDCI,               /*0x0018 Metadata cache image           */
+    H5O_MSG_UNKNOWN,		/*0x0019 Placeholder for unknown message */
+#ifdef H5O_ENABLE_BOGUS
+    H5O_MSG_BOGUS_INVALID, 	/*0x001A "Bogus invalid" (for testing) 	*/
+#else /* H5O_ENABLE_BOGUS */
+    NULL,                       /*0x001A "Bogus invalid" (for testing) 	*/
+#endif /* H5O_ENABLE_BOGUS */
+};
+
+/* Format version bounds for object header */
+const unsigned H5O_obj_ver_bounds[] = {
+    H5O_VERSION_1,      /* H5F_LIBVER_EARLIEST */
+    H5O_VERSION_2,      /* H5F_LIBVER_V18 */
+    H5O_VERSION_LATEST  /* H5F_LIBVER_LATEST */
+};
+
+/* Declare a free list to manage the H5O_t struct */
+H5FL_DEFINE(H5O_t);
+
+/* Declare a free list to manage the H5O_mesg_t sequence information */
+H5FL_SEQ_DEFINE(H5O_mesg_t);
+
+/* Declare a free list to manage the H5O_chunk_t sequence information */
+H5FL_SEQ_DEFINE(H5O_chunk_t);
+
+/* Declare a free list to manage the chunk image information */
+H5FL_BLK_DEFINE(chunk_image);
+
+/* Declare external the free list for H5O_cont_t sequences */
+H5FL_SEQ_EXTERN(H5O_cont_t);
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+/* Declare external the free list for time_t's */
+H5FL_EXTERN(time_t);
+
+/* Declare external the free list for H5_obj_t's */
+H5FL_EXTERN(H5_obj_t);
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Header object ID to class mapping */
+/*
+ * Initialize the object class info table.  Begin with the most general types
+ * and end with the most specific. For instance, any object that has a
+ * datatype message is a datatype but only some of them are datasets.
+ */
+static const H5O_obj_class_t *const H5O_obj_class_g[] = {
+    H5O_OBJ_DATATYPE,		/* Datatype object (H5O_TYPE_NAMED_DATATYPE - 2) */
+    H5O_OBJ_DATASET,		/* Dataset object (H5O_TYPE_DATASET - 1) */
+    H5O_OBJ_GROUP,		/* Group object (H5O_TYPE_GROUP - 0) */
+};
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__init_package
+ *
+ * Purpose:	Initialize information specific to H5O interface.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Thursday, January 18, 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__init_package(void)
+{
+    FUNC_ENTER_PACKAGE_NOERR
+
+    /* H5O interface sanity checks */
+    HDcompile_assert(H5O_MSG_TYPES == NELMTS(H5O_msg_class_g));
+    HDcompile_assert(sizeof(H5O_fheap_id_t) == H5O_FHEAP_ID_LEN);
+
+    HDcompile_assert(H5O_UNKNOWN_ID < H5O_MSG_TYPES);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O__init_package() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O_set_version
+ *
+ * Purpose:     Sets the correct version to encode the object header.
+ *              Chooses the oldest version possible, unless the file's
+ *              low bound indicates otherwise.
+ *
+ * Return:  Success:    Non-negative
+ *          Failure:    Negative
+ *
+ * Programmer:  Vailin Choi; December 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O_set_version(H5F_t *f, H5O_t *oh, uint8_t oh_flags, hbool_t store_msg_crt_idx)
+{
+    uint8_t version;            /* Message version */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check arguments */
+    HDassert(f);
+    HDassert(oh);
+
+    /* Set the correct version to encode object header with */
+    if(store_msg_crt_idx || (oh_flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED))
+        version = H5O_VERSION_LATEST;
+    else
+        version = H5O_VERSION_1;
+
+    /* Upgrade to the version indicated by the file's low bound if higher */
+    version = MAX(version, (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(f)]);
+
+    /* Version bounds check */
+    if(version > H5O_obj_ver_bounds[H5F_HIGH_BOUND(f)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "object header version out of bounds")
+
+    /* Set the message version */
+    oh->version = version;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_set_version() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_create
+ *
+ * Purpose:	Creates a new object header. Allocates space for it and
+ *              then calls an initialization function. The object header
+ *              is opened for write access and should eventually be
+ *              closed by calling H5O_close().
+ *
+ * Return:	Success:	Non-negative, the ENT argument contains
+ *				information about the object header,
+ *				including its address.
+ *
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *		matzke@llnl.gov
+ *		Aug  5 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_create(H5F_t *f, size_t size_hint, size_t initial_rc, hid_t ocpl_id,
+    H5O_loc_t *loc/*out*/)
+{
+    H5P_genplist_t  *oc_plist;          /* Object creation property list */
+    H5O_t      *oh = NULL;              /* Object header created */
+    haddr_t     oh_addr;                /* Address of initial object header */
+    size_t      oh_size;                /* Size of initial object header */
+    uint8_t	oh_flags;		/* Object header's initial status flags */
+    unsigned    insert_flags = H5AC__NO_FLAGS_SET; /* Flags for inserting object header into cache */
+    hbool_t     store_msg_crt_idx;      /* Whether to always store message creation indices for this file */
+    herr_t      ret_value = SUCCEED;    /* return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(f);
+    HDassert(loc);
+    HDassert(TRUE == H5P_isa_class(ocpl_id, H5P_OBJECT_CREATE));
+
+    /* Check for invalid access request */
+    if(0 == (H5F_INTENT(f) & H5F_ACC_RDWR))
+        HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, FAIL, "no write intent on file")
+
+    /* Make certain we allocate at least a reasonable size for the object header */
+    size_hint = H5O_ALIGN_F(f, MAX(H5O_MIN_SIZE, size_hint));
+
+    /* Get the property list */
+    if(NULL == (oc_plist = (H5P_genplist_t *)H5I_object(ocpl_id)))
+        HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not a property list")
+
+    /* Get any object header status flags set by properties */
+    if(H5P_get(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &oh_flags) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get object header flags")
+
+    /* Allocate the object header and zero out header fields */
+    if(NULL == (oh = H5FL_CALLOC(H5O_t)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+    /* Initialize file-specific information for object header */
+    store_msg_crt_idx = H5F_STORE_MSG_CRT_IDX(f);
+
+    if(H5O_set_version(f, oh, oh_flags, store_msg_crt_idx) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set version of objecdt header")
+
+    oh->sizeof_size = H5F_SIZEOF_SIZE(f);
+    oh->sizeof_addr = H5F_SIZEOF_ADDR(f);
+    oh->swmr_write = !!(H5F_INTENT(f) & H5F_ACC_SWMR_WRITE);
+#ifdef H5O_ENABLE_BAD_MESG_COUNT
+    /* Check whether the "bad message count" property is set */
+    if(H5P_exist_plist(oc_plist, H5O_BAD_MESG_COUNT_NAME) > 0) {
+        /* Retrieve bad message count flag */
+        if(H5P_get(oc_plist, H5O_BAD_MESG_COUNT_NAME, &oh->store_bad_mesg_count) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get bad message count flag")
+    }
+#endif /* H5O_ENABLE_BAD_MESG_COUNT */
+
+    /* Create object header proxy if doing SWMR writes */
+    if(oh->swmr_write) {
+        /* Create virtual entry, for use as proxy */
+        if(NULL == (oh->proxy = H5AC_proxy_entry_create()))
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create object header proxy")
+    }
+    else
+        oh->proxy = NULL;
+
+    /* Set initial status flags */
+    oh->flags = oh_flags;
+
+    /* Initialize version-specific fields */
+    if(oh->version > H5O_VERSION_1) {
+        /* Initialize all time fields with current time, if we are storing them */
+        if(oh->flags & H5O_HDR_STORE_TIMES)
+            oh->atime = oh->mtime = oh->ctime = oh->btime = H5_now();
+        else
+            oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
+
+        /* Make certain attribute creation order tracking is enabled if
+         *      attributes can be shared in this file.
+         */
+        if(store_msg_crt_idx)
+            oh->flags |= H5O_HDR_ATTR_CRT_ORDER_TRACKED;
+
+        /* Retrieve attribute storage phase change values from property list */
+        if(H5P_get(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get max. # of compact attributes")
+        if(H5P_get(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get min. # of dense attributes")
+
+        /* Check for non-default attribute storage phase change values */
+        if(oh->max_compact != H5O_CRT_ATTR_MAX_COMPACT_DEF || oh->min_dense != H5O_CRT_ATTR_MIN_DENSE_DEF)
+            oh->flags |= H5O_HDR_ATTR_STORE_PHASE_CHANGE;
+
+        /* Determine correct value for chunk #0 size bits */
+/* Avoid compiler warning on 32-bit machines */
+#if H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T
+        if(size_hint > 4294967295UL)
+            oh->flags |= H5O_HDR_CHUNK0_8;
+        else
+#endif /* H5_SIZEOF_SIZE_T > H5_SIZEOF_INT32_T */
+        if(size_hint > 65535)
+            oh->flags |= H5O_HDR_CHUNK0_4;
+        else if(size_hint > 255)
+            oh->flags |= H5O_HDR_CHUNK0_2;
+    } /* end if */
+    else {
+        /* Reset unused time fields */
+        oh->atime = oh->mtime = oh->ctime = oh->btime = 0;
+    } /* end else */
+
+    /* Compute total size of initial object header */
+    /* (i.e. object header prefix and first chunk) */
+    oh_size = (size_t)H5O_SIZEOF_HDR(oh) + size_hint;
+
+    /* Allocate disk space for header and first chunk */
+    if(HADDR_UNDEF == (oh_addr = H5MF_alloc(f, H5FD_MEM_OHDR, (hsize_t)oh_size)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "file allocation failed for object header")
+
+    /* Create the chunk list */
+    oh->nchunks = oh->alloc_nchunks = 1;
+    if(NULL == (oh->chunk = H5FL_SEQ_MALLOC(H5O_chunk_t, (size_t)oh->alloc_nchunks)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+    /* Initialize the first chunk */
+    oh->chunk[0].addr = oh_addr;
+    oh->chunk[0].size = oh_size;
+    oh->chunk[0].gap = 0;
+
+    /* Allocate enough space for the first chunk */
+    /* (including space for serializing the object header prefix */
+    if(NULL == (oh->chunk[0].image = H5FL_BLK_CALLOC(chunk_image, oh_size)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+    oh->chunk[0].chunk_proxy = NULL;
+
+    /* Put magic # for object header in first chunk */
+    if(oh->version > H5O_VERSION_1)
+        HDmemcpy(oh->chunk[0].image, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+
+    /* Create the message list */
+    oh->nmesgs = 1;
+    oh->alloc_nmesgs = H5O_NMESGS;
+    if(NULL == (oh->mesg = H5FL_SEQ_CALLOC(H5O_mesg_t, oh->alloc_nmesgs)))
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+    /* Initialize the initial "null" message, covering the entire first chunk */
+    oh->mesg[0].type = H5O_MSG_NULL;
+    oh->mesg[0].dirty = TRUE;
+    oh->mesg[0].native = NULL;
+    oh->mesg[0].raw = oh->chunk[0].image + (H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)) + H5O_SIZEOF_MSGHDR_OH(oh);
+    oh->mesg[0].raw_size = size_hint - (size_t)H5O_SIZEOF_MSGHDR_OH(oh);
+    oh->mesg[0].chunkno = 0;
+
+    /* Check for non-zero initial refcount on the object header */
+    if(initial_rc > 0) {
+        /* Set the initial refcount & pin the header when its inserted */
+        oh->rc = initial_rc;
+        insert_flags |= H5AC__PIN_ENTRY_FLAG;
+    }
+
+    /* Set metadata tag in API context */
+    H5_BEGIN_TAG(oh_addr);
+
+    /* Cache object header */
+    if(H5AC_insert_entry(f, H5AC_OHDR, oh_addr, oh, insert_flags) < 0)
+        HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to cache object header")
+
+    /* Reset object header pointer, now that it's been inserted into the cache */
+    oh = NULL;
+
+    /* Reset metadata tag in API context */
+    H5_END_TAG
+
+    /* Set up object location */
+    loc->file = f;
+    loc->addr = oh_addr;
+
+    /* Open it */
+    if(H5O_open(loc) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object header")
+
+done:
+    if(ret_value < 0 && oh)
+        if(H5O__free(oh) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy object header data")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_open
+ *
+ * Purpose:	Opens an object header which is described by the symbol table
+ *		entry OBJ_ENT.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Monday, January	 5, 1998
+ *
+ * Modification:
+ *              Raymond Lu
+ *              5 November 2007
+ *              Turn off the holding file variable if it's on.  When it's
+ *              needed, the caller will turn it on again.
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_open(H5O_loc_t *loc)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(loc->file);
+
+#ifdef H5O_DEBUG
+    if(H5DEBUG(O))
+        HDfprintf(H5DEBUG(O), "> %a\n", loc->addr);
+#endif
+
+    /* Turn off the variable for holding file or increment open-lock counters */
+    if(loc->holding_file)
+     	loc->holding_file = FALSE;
+    else
+        H5F_INCR_NOPEN_OBJS(loc->file);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_open() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_open_name
+ *
+ * Purpose:	Opens an object within an HDF5 file.
+ *
+ * Return:	Success:	An open object identifier
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		March  5 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5O_open_name(const H5G_loc_t *loc, const char *name, hbool_t app_ref)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
+    hid_t       ret_value = H5I_INVALID_HID;
+
+    FUNC_ENTER_NOAPI(H5I_INVALID_HID)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(loc, name, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, H5I_INVALID_HID, "object not found")
+    loc_found = TRUE;
+
+    /* Open the object */
+    if((ret_value = H5O__open_by_loc(&obj_loc, app_ref)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open object")
+
+done:
+    if(ret_value < 0 && loc_found)
+        if(H5G_loc_free(&obj_loc) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, H5I_INVALID_HID, "can't free location")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_open_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__open_name
+ *
+ * Purpose:     Internal routine to open an object by name
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5O__open_name(const H5G_loc_t *loc, const char *name)
+{
+    hid_t ret_value = H5I_INVALID_HID;	/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name);
+
+    /* Open the object */
+    if((ret_value = H5O_open_name(loc, name, TRUE)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open object")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__open_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__open_by_idx
+ *
+ * Purpose:     Internal routine to open an object by index within group
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5O__open_by_idx(const H5G_loc_t *loc, const char *name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
+    hid_t ret_value = H5I_INVALID_HID;	/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location, according to the order in the index */
+    if(H5G_loc_find_by_idx(loc, name, idx_type, order, n, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, H5I_INVALID_HID, "group not found")
+    loc_found = TRUE;
+
+    /* Open the object */
+    if((ret_value = H5O__open_by_loc(&obj_loc, TRUE)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open object")
+
+done:
+    /* Release the object location if we failed after copying it */
+    if(ret_value < 0 && loc_found)
+        if(H5G_loc_free(&obj_loc) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, H5I_INVALID_HID, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__open_by_idx() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__open_by_addr
+ *
+ * Purpose:     Internal routine to open an object by its address
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5O__open_by_addr(const H5G_loc_t *loc, haddr_t addr)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hid_t ret_value = H5I_INVALID_HID;	/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+    obj_loc.oloc->addr = addr;
+    obj_loc.oloc->file = loc->oloc->file;
+    H5G_name_reset(obj_loc.path);       /* objects opened through this routine don't have a path name */
+
+    /* Open the object */
+    if((ret_value = H5O__open_by_loc(&obj_loc, TRUE)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open object")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__open_by_addr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__open_by_loc
+ *
+ * Purpose:	Opens an object and returns an ID given its group loction.
+ *
+ * Return:	Success:	Open object identifier
+ *		Failure:	Negative
+ *
+ * Programmer:	James Laird
+ *		July 25 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+hid_t
+H5O__open_by_loc(const H5G_loc_t *obj_loc, hbool_t app_ref)
+{
+    const H5O_obj_class_t *obj_class;   /* Class of object for location */
+    hid_t ret_value = H5I_INVALID_HID;	/* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    HDassert(obj_loc);
+
+    /* Get the object class for this location */
+    if(NULL == (obj_class = H5O__obj_class(obj_loc->oloc)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5I_INVALID_HID, "unable to determine object class")
+
+    /* Call the object class's 'open' routine */
+    HDassert(obj_class->open);
+    if((ret_value = obj_class->open(obj_loc, app_ref)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open object")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__open_by_loc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__create_link
+ *
+ * Purpose:     Internal routine to create a link from a group to an object
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__create_link(const H5G_loc_t *new_loc, const char *new_name,
+    H5G_loc_t *obj_loc, hid_t lcpl_id)
+{
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(new_loc);
+    HDassert(new_name && *new_name);
+    HDassert(obj_loc);
+
+    /* Link to the object */
+    if(H5L_link(new_loc, new_name, obj_loc, lcpl_id) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "unable to create link")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__create_link() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_close
+ *
+ * Purpose:	Closes an object header that was previously open.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Monday, January	 5, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_close(H5O_loc_t *loc, hbool_t *file_closed /*out*/)
+{
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(loc->file);
+    HDassert(H5F_NOPEN_OBJS(loc->file) > 0);
+
+    /* Set the file_closed flag to the default value.
+     * This flag lets downstream code know if the file struct is
+     * still accessible and/or likely to contain useful data.
+     * It's needed by the evict-on-close code. Clients can ignore
+     * this value by passing in NULL.
+     */
+    if(file_closed)
+        *file_closed = FALSE;
+
+    /* Decrement open-lock counters */
+    H5F_DECR_NOPEN_OBJS(loc->file);
+
+#ifdef H5O_DEBUG
+    if(H5DEBUG(O)) {
+        if(H5F_FILE_ID(loc->file)< 0 && 1 == H5F_NREFS(loc->file))
+            HDfprintf(H5DEBUG(O), "< %a auto %lu remaining\n",
+                loc->addr, (unsigned long)H5F_NOPEN_OBJS(loc->file));
+	else
+	    HDfprintf(H5DEBUG(O), "< %a\n", loc->addr);
+    }
+#endif
+
+    /*
+     * If the file open object count has reached the number of open mount points
+     * (each of which has a group open in the file) attempt to close the file.
+     */
+    if(H5F_NOPEN_OBJS(loc->file) == H5F_NMOUNTS(loc->file))
+        /* Attempt to close down the file hierarchy */
+        if(H5F_try_close(loc->file, file_closed) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTCLOSEFILE, FAIL, "problem attempting file close")
+
+    /* Release location information */
+    if(H5O_loc_free(loc) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "problem attempting to free location")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_close() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__link_oh
+ *
+ * Purpose:	Adjust the link count for an open object header by adding
+ *		ADJUST to the link count.
+ *
+ * Return:	Success:	New link count
+ *
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *		matzke@llnl.gov
+ *		Aug  5 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5O__link_oh(H5F_t *f, int adjust, H5O_t *oh, hbool_t *deleted)
+{
+    haddr_t addr = H5O_OH_GET_ADDR(oh);     /* Object header address */
+    int	ret_value = -1;                     /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* check args */
+    HDassert(f);
+    HDassert(oh);
+    HDassert(deleted);
+
+    /* Check for adjusting link count */
+    if(adjust) {
+        if(adjust < 0) {
+            /* Check for too large of an adjustment */
+            if((unsigned)(-adjust) > oh->nlink)
+                HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "link count would be negative")
+
+            /* Adjust the link count for the object header */
+            oh->nlink = (unsigned)((int)oh->nlink + adjust);
+
+            /* Mark object header as dirty in cache */
+            if(H5AC_mark_entry_dirty(oh) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
+
+            /* Check if the object should be deleted */
+            if(oh->nlink == 0) {
+                /* Check if the object is still open by the user */
+                if(H5FO_opened(f, addr) != NULL) {
+                    /* Flag the object to be deleted when it's closed */
+                    if(H5FO_mark(f, addr, TRUE) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
+                } /* end if */
+                else {
+                    /* Mark the object header for deletion */
+                    *deleted = TRUE;
+                } /* end else */
+            } /* end if */
+        } /* end if */
+        else {
+            /* A new object, or one that will be deleted */
+            if(0 == oh->nlink) {
+                /* Check if the object is currently open, but marked for deletion */
+                if(H5FO_marked(f, addr)) {
+                    /* Remove "delete me" flag on the object */
+                    if(H5FO_mark(f, addr, FALSE) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't mark object for deletion")
+                } /* end if */
+            } /* end if */
+
+            /* Adjust the link count for the object header */
+            oh->nlink = (unsigned)((int)oh->nlink + adjust);
+
+            /* Mark object header as dirty in cache */
+            if(H5AC_mark_entry_dirty(oh) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
+        } /* end if */
+
+        /* Check for operations on refcount message */
+        if(oh->version > H5O_VERSION_1) {
+            /* Check if the object has a refcount message already */
+            if(oh->has_refcount_msg) {
+                /* Check for removing refcount message */
+                if(oh->nlink <= 1) {
+                    if(H5O__msg_remove_real(f, oh, H5O_MSG_REFCOUNT, H5O_ALL, NULL, NULL, TRUE) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete refcount message")
+                    oh->has_refcount_msg = FALSE;
+                } /* end if */
+                /* Update refcount message with new link count */
+                else {
+                    H5O_refcount_t refcount = oh->nlink;
+
+                    if(H5O__msg_write_real(f, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTUPDATE, FAIL, "unable to update refcount message")
+                } /* end else */
+            } /* end if */
+            else {
+                /* Check for adding refcount message to object */
+                if(oh->nlink > 1) {
+                    H5O_refcount_t refcount = oh->nlink;
+
+                    if(H5O__msg_append_real(f, oh, H5O_MSG_REFCOUNT, H5O_MSG_FLAG_DONTSHARE, 0, &refcount) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to create new refcount message")
+                    oh->has_refcount_msg = TRUE;
+                } /* end if */
+            } /* end else */
+        } /* end if */
+    } /* end if */
+
+    /* Set return value */
+    ret_value = (int)oh->nlink;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__link_oh() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_link
+ *
+ * Purpose:	Adjust the link count for an object header by adding
+ *		ADJUST to the link count.
+ *
+ * Return:	Success:	New link count
+ *
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *		matzke@llnl.gov
+ *		Aug  5 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5O_link(const H5O_loc_t *loc, int adjust)
+{
+    H5O_t	*oh = NULL;
+    hbool_t deleted = FALSE;            /* Whether the object was deleted */
+    int	ret_value = -1;                 /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(loc->addr, FAIL)
+
+    /* check args */
+    HDassert(loc);
+    HDassert(loc->file);
+    HDassert(H5F_addr_defined(loc->addr));
+
+    /* Pin the object header */
+    if(NULL == (oh = H5O_pin(loc)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
+
+    /* Call the "real" link routine */
+    if((ret_value = H5O__link_oh(loc->file, adjust, oh, &deleted)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust object link count")
+
+done:
+    if(oh && H5O_unpin(oh) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
+    if(ret_value >= 0 && deleted && H5O_delete(loc->file, loc->addr) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O_link() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__link
+ *
+ * Purpose:     Internal routine to change the refcount for an object
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__link(const H5O_loc_t *oloc, int adjust)
+{
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(oloc);
+
+    /* Change the object's refcount */
+    if(H5O_link(oloc, adjust) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "modifying object link count failed")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__link() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_protect
+ *
+ * Purpose:	Wrapper around H5AC_protect for use during a H5O_protect->
+ *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
+ *              during an object's creation.
+ *
+ * Return:	Success:	Pointer to the object header structure for the
+ *                              object.
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Dec 31 2002
+ *
+ *-------------------------------------------------------------------------
+ */
+H5O_t *
+H5O_protect(const H5O_loc_t *loc, unsigned prot_flags, hbool_t pin_all_chunks)
+{
+    H5O_t *oh = NULL;           /* Object header protected */
+    H5O_cache_ud_t udata;       /* User data for protecting object header */
+    H5O_cont_msgs_t cont_msg_info;      /* Continuation message info */
+    unsigned file_intent;       /* R/W intent on file */
+    H5O_t *ret_value = NULL;    /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(loc->addr, NULL)
+
+    /* check args */
+    HDassert(loc);
+    HDassert(loc->file);
+
+    /* prot_flags may only contain the H5AC__READ_ONLY_FLAG */
+    HDassert((prot_flags & (unsigned)(~H5AC__READ_ONLY_FLAG)) == 0);
+
+    /* Check for valid address */
+    if(!H5F_addr_defined(loc->addr))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "address undefined")
+
+    /* Check for write access on the file */
+    file_intent = H5F_INTENT(loc->file);
+    if((0 == (prot_flags & H5AC__READ_ONLY_FLAG)) && (0 == (file_intent & H5F_ACC_RDWR)))
+        HGOTO_ERROR(H5E_OHDR, H5E_BADVALUE, NULL, "no write intent on file")
+
+    /* Construct the user data for protect callback */
+    udata.made_attempt = FALSE;
+    udata.v1_pfx_nmesgs = 0;
+    udata.chunk0_size = 0;
+    udata.oh = NULL;
+    udata.free_oh = FALSE;
+    udata.common.f = loc->file;
+    udata.common.file_intent = file_intent;
+    udata.common.merged_null_msgs = 0;
+    HDmemset(&cont_msg_info, 0, sizeof(cont_msg_info));
+    udata.common.cont_msg_info = &cont_msg_info;
+    udata.common.addr = loc->addr;
+
+    /* Lock the object header into the cache */
+    if(NULL == (oh = (H5O_t *)H5AC_protect(loc->file, H5AC_OHDR, loc->addr, &udata, prot_flags)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
+
+    /* Check if there are any continuation messages to process */
+    if(cont_msg_info.nmsgs > 0) {
+        size_t curr_msg;        /* Current continuation message to process */
+        H5O_chk_cache_ud_t chk_udata;   /* User data for loading chunk */
+
+        /* Sanity check - we should only have continuation messages to process
+         *      when the object header is actually loaded from the file.
+         */
+        HDassert(udata.made_attempt == TRUE);
+        HDassert(cont_msg_info.msgs);
+
+        /* Construct the user data for protecting chunks */
+        chk_udata.decoding = TRUE;
+        chk_udata.oh = oh;
+        chk_udata.chunkno = UINT_MAX;   /* Set to invalid value, for better error detection */
+        chk_udata.common.f = loc->file;
+        chk_udata.common.file_intent = file_intent;
+        chk_udata.common.merged_null_msgs = udata.common.merged_null_msgs;
+        chk_udata.common.cont_msg_info = &cont_msg_info;
+
+        /* Read in continuation messages, until there are no more */
+        /* (Note that loading chunks could increase the # of continuation
+         *      messages if new ones are found - QAK, 19/11/2016)
+         */
+        curr_msg = 0;
+        while(curr_msg < cont_msg_info.nmsgs) {
+            H5O_chunk_proxy_t *chk_proxy;       /* Proxy for chunk, to bring it into memory */
+#ifndef NDEBUG
+            size_t chkcnt = oh->nchunks;      /* Count of chunks (for sanity checking) */
+#endif /* NDEBUG */
+
+            /* Bring the chunk into the cache */
+            /* (which adds to the object header) */
+            chk_udata.common.addr = cont_msg_info.msgs[curr_msg].addr;
+            chk_udata.size = cont_msg_info.msgs[curr_msg].size;
+            if(NULL == (chk_proxy = (H5O_chunk_proxy_t *)H5AC_protect(loc->file, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, &chk_udata, prot_flags)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header chunk")
+
+            /* Sanity check */
+            HDassert(chk_proxy->oh == oh);
+            HDassert(chk_proxy->chunkno == chkcnt);
+            HDassert(oh->nchunks == (chkcnt + 1));
+
+            /* Release the chunk from the cache */
+            if(H5AC_unprotect(loc->file, H5AC_OHDR_CHK, cont_msg_info.msgs[curr_msg].addr, chk_proxy, H5AC__NO_FLAGS_SET) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header chunk")
+
+            /* Advance to next continuation message */
+            curr_msg++;
+        } /* end while */
+
+        /* Release any continuation messages built up */
+        cont_msg_info.msgs = (H5O_cont_t *)H5FL_SEQ_FREE(H5O_cont_t, cont_msg_info.msgs);
+
+        /* Pass back out some of the chunk's user data */
+        udata.common.merged_null_msgs = chk_udata.common.merged_null_msgs;
+    } /* end if */
+
+    /* Check for incorrect # of object header messages, if we've just loaded
+     *  this object header from the file
+     */
+    if(udata.made_attempt) {
+/* Don't enforce the error on an incorrect # of object header messages bug
+ *      unless strict format checking is enabled.  This allows for older
+ *      files, created with a version of the library that had a bug in tracking
+ *      the correct # of header messages to be read in without the library
+ *      erroring out here. -QAK
+ */
+#ifdef H5_STRICT_FORMAT_CHECKS
+        /* Check for incorrect # of messages in v1 object header */
+        if(oh->version == H5O_VERSION_1 &&
+                (oh->nmesgs + udata.common.merged_null_msgs) != udata.v1_pfx_nmesgs)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "corrupt object header - incorrect # of messages")
+#endif /* H5_STRICT_FORMAT_CHECKS */
+    } /* end if */
+
+#ifdef H5O_DEBUG
+H5O_assert(oh);
+#endif /* H5O_DEBUG */
+
+    /* Pin the other chunks also when requested, so that the object header
+     *  proxy can be set up.
+     */
+    if(pin_all_chunks && oh->nchunks > 1) {
+        unsigned u;         /* Local index variable */
+
+        /* Sanity check */
+        HDassert(oh->swmr_write);
+
+        /* Iterate over chunks > 0 */
+        for(u = 1; u < oh->nchunks; u++) {
+            H5O_chunk_proxy_t *chk_proxy;       /* Chunk proxy */
+
+            /* Protect chunk */
+            if(NULL == (chk_proxy = H5O__chunk_protect(loc->file, oh, u)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header chunk")
+
+            /* Pin chunk proxy*/
+            if(H5AC_pin_protected_entry(chk_proxy) < 0 )
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, NULL, "unable to pin object header chunk")
+
+            /* Unprotect chunk */
+            if(H5O__chunk_unprotect(loc->file, chk_proxy, FALSE) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to unprotect object header chunk")
+
+            /* Preserve chunk proxy pointer for later */
+            oh->chunk[u].chunk_proxy = chk_proxy;
+        } /* end for */
+
+        /* Set the flag for the unprotect */
+        oh->chunks_pinned = TRUE;
+    } /* end if */
+
+    /* Set return value */
+    ret_value = oh;
+
+done:
+    if(ret_value == NULL && oh)
+        if(H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O_protect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_pin
+ *
+ * Purpose:	Pin an object header down for use during a sequence of message
+ *              operations, which prevents the object header from being
+ *              evicted from the cache.
+ *
+ * Return:	Success:	Pointer to the object header structure for the
+ *                              object.
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+H5O_t *
+H5O_pin(const H5O_loc_t *loc)
+{
+    H5O_t       *oh = NULL;             /* Object header */
+    H5O_t       *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_NOAPI(NULL)
+
+    /* check args */
+    HDassert(loc);
+
+    /* Get header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__NO_FLAGS_SET, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header")
+
+    /* Increment the reference count on the object header */
+    /* (which will pin it, if appropriate) */
+    if(H5O__inc_rc(oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, NULL, "unable to increment reference count on object header")
+
+    /* Set the return value */
+    ret_value = oh;
+
+done:
+    /* Release the object header from the cache */
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_pin() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_unpin
+ *
+ * Purpose:	Unpin an object header, allowing it to be evicted from the
+ *              metadata cache.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_unpin(H5O_t *oh)
+{
+    herr_t ret_value = SUCCEED;      /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(oh);
+
+    /* Decrement the reference count on the object header */
+    /* (which will unpin it, if appropriate) */
+    if(H5O__dec_rc(oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_unpin() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_unprotect
+ *
+ * Purpose:	Wrapper around H5AC_unprotect for use during a H5O_protect->
+ *              H5O_msg_append->...->H5O_msg_append->H5O_unprotect sequence of calls
+ *              during an object's creation.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Dec 31 2002
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_unprotect(const H5O_loc_t *loc, H5O_t *oh, unsigned oh_flags)
+{
+    herr_t ret_value = SUCCEED;      /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(loc);
+    HDassert(oh);
+
+    /* Unpin the other chunks */
+    if(oh->chunks_pinned && oh->nchunks > 1) {
+        unsigned u;         /* Local index variable */
+
+        /* Sanity check */
+        HDassert(oh->swmr_write);
+
+        /* Iterate over chunks > 0 */
+        for(u = 1; u < oh->nchunks; u++) {
+            if(NULL != oh->chunk[u].chunk_proxy) {
+                /* Release chunk proxy */
+                if(H5AC_unpin_entry(oh->chunk[u].chunk_proxy) < 0)
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header chunk")
+                oh->chunk[u].chunk_proxy = NULL;
+            } /* end if */
+        } /* end for */
+
+        /* Reet the flag from the unprotect */
+        oh->chunks_pinned = FALSE;
+    } /* end if */
+
+    /* Unprotect the object header */
+    if(H5AC_unprotect(loc->file, H5AC_OHDR, oh->chunk[0].addr, oh, oh_flags) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_unprotect() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_touch_oh
+ *
+ * Purpose:	If FORCE is non-zero then create a modification time message
+ *		unless one already exists.  Then update any existing
+ *		modification time message with the current time.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, July 27, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_touch_oh(H5F_t *f, H5O_t *oh, hbool_t force)
+{
+    H5O_chunk_proxy_t *chk_proxy = NULL;        /* Chunk that message is in */
+    hbool_t chk_dirtied = FALSE;        /* Flag for unprotecting chunk */
+    time_t	now;                    /* Current time */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(f);
+    HDassert(oh);
+
+    /* Check if this object header is tracking times */
+    if(oh->flags & H5O_HDR_STORE_TIMES) {
+        /* Get current time */
+        now = H5_now();
+
+        /* Check version, to determine how to store time information */
+        if(oh->version == H5O_VERSION_1) {
+            size_t	idx;                    /* Index of modification time message to update */
+
+            /* Look for existing message */
+            for(idx = 0; idx < oh->nmesgs; idx++)
+                if(H5O_MSG_MTIME == oh->mesg[idx].type || H5O_MSG_MTIME_NEW == oh->mesg[idx].type)
+                    break;
+
+            /* Create a new message, if necessary */
+            if(idx == oh->nmesgs) {
+                unsigned mesg_flags = 0;        /* Flags for message in object header */
+
+                /* If we would have to create a new message, but we aren't 'forcing' it, get out now */
+                if(!force)
+                    HGOTO_DONE(SUCCEED);        /*nothing to do*/
+
+                /* Allocate space for the modification time message */
+                if(H5O__msg_alloc(f, oh, H5O_MSG_MTIME_NEW, &mesg_flags, &now, &idx) < 0)
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for modification time message")
+
+                /* Set the message's flags if appropriate */
+                oh->mesg[idx].flags = (uint8_t)mesg_flags;
+            } /* end if */
+
+            /* Protect chunk */
+            if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, oh->mesg[idx].chunkno)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header chunk")
+
+            /* Allocate 'native' space, if necessary */
+            if(NULL == oh->mesg[idx].native) {
+                if(NULL == (oh->mesg[idx].native = H5FL_MALLOC(time_t)))
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for modification time message")
+            } /* end if */
+
+            /* Update the message */
+            *((time_t *)(oh->mesg[idx].native)) = now;
+
+            /* Mark the message as dirty */
+            oh->mesg[idx].dirty = TRUE;
+            chk_dirtied = TRUE;
+        } /* end if */
+        else {
+            /* XXX: For now, update access time & change fields in the object header */
+            /* (will need to add some code to update modification time appropriately) */
+            oh->atime = oh->ctime = now;
+
+            /* Mark object header as dirty in cache */
+            if(H5AC_mark_entry_dirty(oh) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTMARKDIRTY, FAIL, "unable to mark object header as dirty")
+        } /* end else */
+    } /* end if */
+
+done:
+    /* Release chunk */
+    if(chk_proxy && H5O__chunk_unprotect(f, chk_proxy, chk_dirtied) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header chunk")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_touch_oh() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_touch
+ *
+ * Purpose:	Touch an object by setting the modification time to the
+ *		current time and marking the object as dirty.  Unless FORCE
+ *		is non-zero, nothing happens if there is no MTIME message in
+ *		the object header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *              Monday, July 27, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_touch(const H5O_loc_t *loc, hbool_t force)
+{
+    H5O_t	*oh = NULL;             /* Object header to modify */
+    unsigned 	oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(loc);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__NO_FLAGS_SET, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Create/Update the modification time message */
+    if(H5O_touch_oh(loc->file, oh, force) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "unable to update object modificaton time")
+
+    /* Mark object header as changed */
+    oh_flags |= H5AC__DIRTIED_FLAG;
+
+done:
+    if(oh && H5O_unprotect(loc, oh, oh_flags) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_touch() */
+
+#ifdef H5O_ENABLE_BOGUS
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_bogus_oh
+ *
+ * Purpose:	Create a "bogus" message unless one already exists.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              <koziol@ncsa.uiuc.edu>
+ *              Tuesday, January 21, 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_bogus_oh(H5F_t *f, H5O_t *oh, unsigned bogus_id, unsigned mesg_flags)
+{
+    size_t	idx;                /* Local index variable */
+    H5O_msg_class_t *type;	    /* Message class type */
+    herr_t ret_value = SUCCEED;     /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    HDassert(f);
+    HDassert(oh);
+
+    /* Look for existing message */
+    for(idx = 0; idx < oh->nmesgs; idx++)
+        if(H5O_MSG_BOGUS_VALID == oh->mesg[idx].type || H5O_MSG_BOGUS_INVALID == oh->mesg[idx].type)
+            break;
+
+    /* Create a new message */
+    if(idx == oh->nmesgs) {
+        H5O_bogus_t *bogus;             /* Pointer to the bogus information */
+
+        /* Allocate the native message in memory */
+	if(NULL == (bogus = H5MM_malloc(sizeof(H5O_bogus_t))))
+	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "memory allocation failed for 'bogus' message")
+
+        /* Update the native value */
+        bogus->u = H5O_BOGUS_VALUE;
+
+	if(bogus_id == H5O_BOGUS_VALID_ID)
+	    type = H5O_MSG_BOGUS_VALID;
+	else if(bogus_id == H5O_BOGUS_INVALID_ID)
+	    type = H5O_MSG_BOGUS_INVALID;
+	else
+	    HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "invalid ID for 'bogus' message")
+
+        /* Allocate space in the object header for bogus message */
+	if(H5O__msg_alloc(f, oh, type, &mesg_flags, bogus, &idx) < 0)
+	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for 'bogus' message")
+
+        /* Point to "bogus" information (take it over) */
+	oh->mesg[idx].native = bogus;
+
+        /* Set the appropriate flags for the message */
+        oh->mesg[idx].flags = mesg_flags;
+
+        /* Mark the message and object header as dirty */
+        oh->mesg[idx].dirty = TRUE;
+        oh->cache_info.is_dirty = TRUE;
+    } /* end if */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_bogus_oh() */
+#endif /* H5O_ENABLE_BOGUS */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_delete
+ *
+ * Purpose:	Delete an object header from a file.  This frees the file
+ *              space used for the object header (and it's continuation blocks)
+ *              and also walks through each header message and asks it to
+ *              remove all the pieces of the file referenced by the header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar 19 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_delete(H5F_t *f, haddr_t addr)
+{
+    H5O_t *oh = NULL;           /* Object header information */
+    H5O_loc_t loc;              /* Object location for object to delete */
+    unsigned oh_flags = H5AC__NO_FLAGS_SET; /* Flags for unprotecting object header */
+    hbool_t corked;
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(addr, FAIL)
+
+    /* Check args */
+    HDassert(f);
+    HDassert(H5F_addr_defined(addr));
+
+    /* Set up the object location */
+    loc.file = f;
+    loc.addr = addr;
+    loc.holding_file = FALSE;
+
+    /* Get the object header information */
+    if(NULL == (oh = H5O_protect(&loc, H5AC__NO_FLAGS_SET, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Delete object */
+    if(H5O__delete_oh(f, oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "can't delete object from file")
+
+    /* Uncork cache entries with tag: addr */
+    if(H5AC_cork(f, addr, H5AC__GET_CORKED, &corked) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to retrieve an object's cork status")
+    if(corked)
+        if(H5AC_cork(f, addr, H5AC__UNCORK, NULL) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTUNCORK, FAIL, "unable to uncork an object")
+
+    /* Mark object header as deleted */
+    oh_flags = H5AC__DIRTIED_FLAG | H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG;
+
+done:
+    if(oh && H5O_unprotect(&loc, oh, oh_flags) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O_delete() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__delete_oh
+ *
+ * Purpose:	Internal function to:
+ *              Delete an object header from a file.  This frees the file
+ *              space used for the object header (and it's continuation blocks)
+ *              and also walks through each header message and asks it to
+ *              remove all the pieces of the file referenced by the header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Mar 19 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__delete_oh(H5F_t *f, H5O_t *oh)
+{
+    H5O_mesg_t *curr_msg;       /* Pointer to current message being operated on */
+    unsigned	u;
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check args */
+    HDassert(f);
+    HDassert(oh);
+
+    /* Walk through the list of object header messages, asking each one to
+     * delete any file space used
+     */
+    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
+        /* Free any space referred to in the file from this message */
+        if(H5O__delete_mesg(f, oh, curr_msg) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
+    } /* end for */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__delete_oh() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_obj_type
+ *
+ * Purpose:	Retrieves the type of object pointed to by `loc'.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Robb Matzke
+ *              Wednesday, November  4, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_obj_type(const H5O_loc_t *loc, H5O_type_t *obj_type)
+{
+    H5O_t	*oh = NULL;             /* Object header for location */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(loc->addr, FAIL)
+
+    /* Load the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Retrieve the type of the object */
+    if(H5O__obj_type_real(oh, obj_type) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
+
+done:
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O_obj_type() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__obj_type_real
+ *
+ * Purpose:	Returns the type of object pointed to by `oh'.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November 21, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__obj_type_real(const H5O_t *oh, H5O_type_t *obj_type)
+{
+    const H5O_obj_class_t *obj_class;           /* Class of object for header */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Sanity check */
+    HDassert(oh);
+    HDassert(obj_type);
+
+    /* Look up class for object header */
+    if(NULL == (obj_class = H5O__obj_class_real(oh))) {
+        /* Clear error stack from "failed" class lookup */
+        H5E_clear_stack(NULL);
+
+        /* Set type to "unknown" */
+        *obj_type = H5O_TYPE_UNKNOWN;
+    } /* end if */
+    else {
+        /* Set object type */
+        *obj_type = obj_class->type;
+    } /* end else */
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O__obj_type_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__obj_class
+ *
+ * Purpose:	Returns the class of object pointed to by `loc'.
+ *
+ * Return:	Success:	An object class
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November  6, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+const H5O_obj_class_t *
+H5O__obj_class(const H5O_loc_t *loc)
+{
+    H5O_t	*oh = NULL;                     /* Object header for location */
+    const H5O_obj_class_t *ret_value = NULL;    /* Return value */
+
+    FUNC_ENTER_STATIC_TAG(loc->addr)
+
+    /* Load the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to load object header")
+
+    /* Test whether entry qualifies as a particular type of object */
+    if(NULL == (ret_value = H5O__obj_class_real(oh)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to determine object type")
+
+done:
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O__obj_class() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__obj_class_real
+ *
+ * Purpose:	Returns the class of object pointed to by `oh'.
+ *
+ * Return:	Success:	An object class
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, November 21, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+static const H5O_obj_class_t *
+H5O__obj_class_real(const H5O_t *oh)
+{
+    size_t	i;                      /* Local index variable */
+    const H5O_obj_class_t *ret_value = NULL;   /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity check */
+    HDassert(oh);
+
+    /* Test whether entry qualifies as a particular type of object */
+    /* (Note: loop is in reverse order, to test specific objects first) */
+    for(i = NELMTS(H5O_obj_class_g); i > 0; --i) {
+        htri_t	isa;            /* Is entry a particular type? */
+
+        if((isa = (H5O_obj_class_g[i - 1]->isa)(oh)) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
+        else if(isa)
+            HGOTO_DONE(H5O_obj_class_g[i - 1])
+    } /* end for */
+
+    if(0 == i)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, NULL, "unable to determine object type")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__obj_class_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_loc
+ *
+ * Purpose:	Gets the object location for an object given its ID.
+ *
+ * Return:	Success:	Pointer to H5O_loc_t
+ *		Failure:	NULL
+ *
+ * Programmer:	James Laird
+ *		July 25 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+H5O_loc_t *
+H5O_get_loc(hid_t object_id)
+{
+    H5O_loc_t   *ret_value = NULL;      /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    switch(H5I_get_type(object_id)) {
+        case H5I_GROUP:
+            if(NULL == (ret_value = H5O_OBJ_GROUP->get_oloc(object_id)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from group ID")
+            break;
+
+        case H5I_DATASET:
+            if(NULL == (ret_value = H5O_OBJ_DATASET->get_oloc(object_id)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from dataset ID")
+            break;
+
+        case H5I_DATATYPE:
+            if(NULL == (ret_value = H5O_OBJ_DATATYPE->get_oloc(object_id)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "unable to get object location from datatype ID")
+            break;
+
+        case H5I_UNINIT:
+        case H5I_BADID:
+        case H5I_FILE:
+        case H5I_DATASPACE:
+        case H5I_ATTR:
+        case H5I_REFERENCE:
+        case H5I_VFL:
+        case H5I_GENPROP_CLS:
+        case H5I_GENPROP_LST:
+        case H5I_ERROR_CLASS:
+        case H5I_ERROR_MSG:
+        case H5I_ERROR_STACK:
+        case H5I_NTYPES:
+        default:
+            HGOTO_ERROR(H5E_OHDR, H5E_BADTYPE, NULL, "invalid object type")
+    } /* end switch */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_loc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_loc_reset
+ *
+ * Purpose:	Reset a object location to an empty state
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              Monday, September 19, 2005
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_reset(H5O_loc_t *loc)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check arguments */
+    HDassert(loc);
+
+    /* Clear the object location to an empty state */
+    HDmemset(loc, 0, sizeof(H5O_loc_t));
+    loc->addr = HADDR_UNDEF;
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_loc_reset() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O_loc_copy
+ *
+ * Purpose:     Copy object location information
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *              koziol@ncsa.uiuc.edu
+ *              Monday, September 19, 2005
+ *
+ * Notes:       'depth' parameter determines how much of the group entry
+ *              structure we want to copy.  The values are:
+ *                  H5_COPY_SHALLOW - Copy all the field values from the source
+ *                      to the destination, but not copying objects pointed to.
+ *                      (Destination "takes ownership" of objects pointed to)
+ *                  H5_COPY_DEEP - Copy all the fields from the source to
+ *                      the destination, deep copying objects pointed to.
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_copy(H5O_loc_t *dst, H5O_loc_t *src, H5_copy_depth_t depth)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check arguments */
+    HDassert(src);
+    HDassert(dst);
+    HDassert(depth == H5_COPY_SHALLOW || depth == H5_COPY_DEEP);
+
+    /* Copy the top level information */
+    HDmemcpy(dst, src, sizeof(H5O_loc_t));
+
+    /* Deep copy the names */
+    if(depth == H5_COPY_DEEP) {
+        /* If the original entry was holding open the file, this one should
+         * hold it open, too.
+         */
+        if(src->holding_file)
+            H5F_INCR_NOPEN_OBJS(dst->file);
+    }
+    else if(depth == H5_COPY_SHALLOW) {
+        H5O_loc_reset(src);
+    }
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_loc_copy() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_loc_hold_file
+ *
+ * Purpose:	Have this object header hold a file open until it is
+ *              released.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	James Laird
+ *              Wednesday, August 16, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_hold_file(H5O_loc_t *loc)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(loc->file);
+
+    /* If this location is not already holding its file open, do so. */
+    if(!loc->holding_file) {
+        H5F_INCR_NOPEN_OBJS(loc->file);
+        loc->holding_file = TRUE;
+    }
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O_loc_hold_file() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_loc_free
+ *
+ * Purpose:	Release resources used by this object header location.
+ *              Not to be confused with H5O_close; this is used on
+ *              locations that don't correspond to open objects.
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	James Laird
+ *              Wednesday, August 16, 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_loc_free(H5O_loc_t *loc)
+{
+    herr_t ret_value = SUCCEED;
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Check arguments */
+    HDassert(loc);
+
+    /* If this location is holding its file open try to close the file. */
+    if(loc->holding_file) {
+        H5F_DECR_NOPEN_OBJS(loc->file);
+        loc->holding_file = FALSE;
+        if(H5F_NOPEN_OBJS(loc->file) <= 0) {
+            if(H5F_try_close(loc->file, NULL) < 0)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTCLOSEFILE, FAIL, "can't close file")
+        }
+    }
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_loc_free() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__exists_by_name
+ *
+ * Purpose:     Internal routine to check if an object exists
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+htri_t
+H5O__exists_by_name(const H5G_loc_t *loc, const char *name)
+{
+    htri_t ret_value = FAIL;	/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Check if the object exists */
+    if((ret_value = H5G_loc_exists(loc, name)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine if '%s' exists", name)
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__exists_by_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_hdr_info
+ *
+ * Purpose:	Retrieve the object header information for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		September 22 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_hdr_info(const H5O_loc_t *loc, H5O_hdr_info_t *hdr)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(hdr);
+
+    /* Reset the object header info structure */
+    HDmemset(hdr, 0, sizeof(*hdr));
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, FAIL, "unable to load object header")
+
+    /* Get the information for the object header */
+    if(H5O__get_hdr_info_real(oh, hdr) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
+
+done:
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+	HDONE_ERROR(H5E_OHDR, H5E_PROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_hdr_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__get_hdr_info_real
+ *
+ * Purpose:	Internal routine to retrieve the object header information for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		September 22 2009
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__get_hdr_info_real(const H5O_t *oh, H5O_hdr_info_t *hdr)
+{
+    const H5O_mesg_t *curr_msg;         /* Pointer to current message being operated on */
+    const H5O_chunk_t *curr_chunk;	/* Pointer to current message being operated on */
+    unsigned u;                         /* Local index variable */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Check args */
+    HDassert(oh);
+    HDassert(hdr);
+
+    /* Set the version for the object header */
+    hdr->version = oh->version;
+
+    /* Set the number of messages & chunks */
+    H5_CHECKED_ASSIGN(hdr->nmesgs, unsigned, oh->nmesgs, size_t);
+    H5_CHECKED_ASSIGN(hdr->nchunks, unsigned, oh->nchunks, size_t);
+
+    /* Set the status flags */
+    hdr->flags = oh->flags;
+
+    /* Iterate over all the messages, accumulating message size & type information */
+    hdr->space.meta = (hsize_t)H5O_SIZEOF_HDR(oh) + (hsize_t)(H5O_SIZEOF_CHKHDR_OH(oh) * (oh->nchunks - 1));
+    hdr->space.mesg = 0;
+    hdr->space.free = 0;
+    hdr->mesg.present = 0;
+    hdr->mesg.shared = 0;
+    for(u = 0, curr_msg = &oh->mesg[0]; u < oh->nmesgs; u++, curr_msg++) {
+        uint64_t type_flag;             /* Flag for message type */
+
+        /* Accumulate space usage information, based on the type of message */
+        if(H5O_NULL_ID == curr_msg->type->id)
+            hdr->space.free += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
+        else if(H5O_CONT_ID == curr_msg->type->id)
+            hdr->space.meta += (hsize_t)((size_t)H5O_SIZEOF_MSGHDR_OH(oh) + curr_msg->raw_size);
+        else {
+            hdr->space.meta += (hsize_t)H5O_SIZEOF_MSGHDR_OH(oh);
+            hdr->space.mesg += curr_msg->raw_size;
+        } /* end else */
+
+        /* Set flag to indicate presence of message type */
+        type_flag = ((uint64_t)1) << curr_msg->type->id;
+        hdr->mesg.present |= type_flag;
+
+        /* Set flag if the message is shared in some way */
+        if(curr_msg->flags & H5O_MSG_FLAG_SHARED)                                   \
+            hdr->mesg.shared |= type_flag;
+    } /* end for */
+
+    /* Iterate over all the chunks, adding any gaps to the free space */
+    hdr->space.total = 0;
+    for(u = 0, curr_chunk = &oh->chunk[0]; u < oh->nchunks; u++, curr_chunk++) {
+        /* Accumulate the size of the header on disk */
+        hdr->space.total += curr_chunk->size;
+
+        /* If the chunk has a gap, add it to the free space */
+        hdr->space.free += curr_chunk->gap;
+    } /* end for */
+
+    /* Sanity check that all the bytes are accounted for */
+    HDassert(hdr->space.total == (hdr->space.free + hdr->space.meta + hdr->space.mesg));
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O__get_hdr_info_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_info
+ *
+ * Purpose:	Retrieve the information for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		November 21 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_info(const H5O_loc_t *loc, hbool_t want_ih_info, H5O_info_t *oinfo)
+{
+    const H5O_obj_class_t *obj_class;   /* Class of object for header */
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_TAG(loc->addr, FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(oinfo);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Reset the object info structure */
+    HDmemset(oinfo, 0, sizeof(*oinfo));
+
+    /* Retrieve the file's fileno */
+    H5F_GET_FILENO(loc->file, oinfo->fileno);
+
+    /* Set the object's address */
+    oinfo->addr = loc->addr;
+
+    /* Get class for object */
+    if(NULL == (obj_class = H5O__obj_class_real(oh)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to determine object class")
+
+    /* Retrieve the type of the object */
+    oinfo->type = obj_class->type;
+
+    /* Set the object's reference count */
+    oinfo->rc = oh->nlink;
+
+    /* Get modification time for object */
+    if(oh->version > H5O_VERSION_1) {
+        oinfo->atime = oh->atime;
+        oinfo->mtime = oh->mtime;
+        oinfo->ctime = oh->ctime;
+        oinfo->btime = oh->btime;
+    } /* end if */
+    else {
+        htri_t	exists;                 /* Flag if header message of interest exists */
+
+        /* No information for access & modification fields */
+        /* (we stopped updating the "modification time" header message for
+         *      raw data changes, so the "modification time" header message
+         *      is closest to the 'change time', in POSIX terms - QAK)
+         */
+        oinfo->atime = 0;
+        oinfo->mtime = 0;
+        oinfo->btime = 0;
+
+        /* Might be information for modification time */
+        if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_ID)) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME message")
+        if(exists > 0) {
+            /* Get "old style" modification time info */
+            if(NULL == H5O_msg_read_oh(loc->file, oh, H5O_MTIME_ID, &oinfo->ctime))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME message")
+        } /* end if */
+        else {
+            /* Check for "new style" modification time info */
+            if((exists = H5O_msg_exists_oh(oh, H5O_MTIME_NEW_ID)) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "unable to check for MTIME_NEW message")
+            if(exists > 0) {
+                /* Get "new style" modification time info */
+                if(NULL == H5O_msg_read_oh(loc->file, oh, H5O_MTIME_NEW_ID, &oinfo->ctime))
+                    HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't read MTIME_NEW message")
+            } /* end if */
+            else
+                oinfo->ctime = 0;
+        } /* end else */
+    } /* end else */
+
+    /* Get the information for the object header */
+    if(H5O__get_hdr_info_real(oh, &oinfo->hdr) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object header info")
+
+    /* Retrieve # of attributes */
+    if(H5O_attr_count_real(loc->file, oh, &oinfo->num_attrs) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute count")
+
+    /* Get B-tree & heap metadata storage size, if requested */
+    if(want_ih_info) {
+        /* Check for 'bh_info' callback for this type of object */
+        if(obj_class->bh_info)
+            /* Call the object's class 'bh_info' routine */
+            if((obj_class->bh_info)(loc, oh, &oinfo->meta_size.obj) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object's btree & heap info")
+
+        /* Get B-tree & heap info for any attributes */
+        if(oinfo->num_attrs > 0)
+            if(H5O__attr_bh_info(loc->file, oh, &oinfo->meta_size.attr) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve attribute btree & heap info")
+    } /* end if */
+
+done:
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5O_get_info() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__get_info_by_name
+ *
+ * Purpose:     Internal routine to retrieve an object's info
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__get_info_by_name(const H5G_loc_t *loc, const char *name, H5O_info_t *oinfo)
+{
+    herr_t ret_value = SUCCEED;		/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+    HDassert(oinfo);
+
+    /* Retrieve the object's information */
+    if(H5G_loc_info(loc, name, TRUE, oinfo/*out*/) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object info")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__get_info_by_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__get_info_by_idx
+ *
+ * Purpose:     Internal routine to retrieve an object's info according to
+ *              an index within a group.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__get_info_by_idx(const H5G_loc_t *loc, const char *group_name, H5_index_t idx_type,
+    H5_iter_order_t order, hsize_t n, H5O_info_t *oinfo)
+{
+    H5G_loc_t   obj_loc;                /* Location used to open group */
+    H5G_name_t  obj_path;            	/* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
+    herr_t ret_value = SUCCEED;		/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(group_name && *group_name);
+    HDassert(oinfo);
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location, according to the order in the index */
+    if(H5G_loc_find_by_idx(loc, group_name, idx_type, order, n, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Retrieve the object's information */
+    if(H5O_get_info(obj_loc.oloc, TRUE, oinfo) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't retrieve object info")
+
+done:
+    /* Release the object location */
+    if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__get_info_by_idx() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__set_comment_by_name
+ *
+ * Purpose:     Internal routine to set an object's "comment"
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__set_comment_by_name(const H5G_loc_t *loc, const char *name,
+    const char *comment)
+{
+    herr_t ret_value = SUCCEED;		/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* (Re)set the object's comment */
+    if(H5G_loc_set_comment(loc, name, comment) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set comment for object")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__set_comment_by_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__get_comment_by_name
+ *
+ * Purpose:     Internal routine to retrieve an object's "comment"
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		December 28, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+ssize_t
+H5O__get_comment_by_name(const H5G_loc_t *loc, const char *name,
+    char *comment, size_t bufsize)
+{
+    ssize_t ret_value = FAIL;		/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check arguments */
+    HDassert(loc);
+    HDassert(name && *name);
+
+    /* Retrieve the object's comment */
+    if((ret_value = H5G_loc_get_comment(loc, name, comment/*out*/, bufsize)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "can't get comment for object")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__get_comment_by_name() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_create_plist
+ *
+ * Purpose:	Retrieve the object creation properties for an object
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		November 28 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_create_plist(const H5O_loc_t *loc, H5P_genplist_t *oc_plist)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(oc_plist);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Set property values, if they were used for the object */
+    if(oh->version > H5O_VERSION_1) {
+        uint8_t ohdr_flags;             /* "User-visible" object header status flags */
+
+        /* Set attribute storage values */
+        if(H5P_set(oc_plist, H5O_CRT_ATTR_MAX_COMPACT_NAME, &oh->max_compact) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set max. # of compact attributes in property list")
+        if(H5P_set(oc_plist, H5O_CRT_ATTR_MIN_DENSE_NAME, &oh->min_dense) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set min. # of dense attributes in property list")
+
+        /* Mask off non-"user visible" flags */
+        ohdr_flags = oh->flags & (H5O_HDR_ATTR_CRT_ORDER_TRACKED | H5O_HDR_ATTR_CRT_ORDER_INDEXED | H5O_HDR_STORE_TIMES);
+
+        /* Set object header flags */
+        if(H5P_set(oc_plist, H5O_CRT_OHDR_FLAGS_NAME, &ohdr_flags) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set object header flags")
+    } /* end if */
+
+done:
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_create_plist() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_nlinks
+ *
+ * Purpose:	Retrieve the number of link messages read in from the file
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		March 11 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_nlinks(const H5O_loc_t *loc, hsize_t *nlinks)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+    HDassert(nlinks);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Retrieve the # of link messages seen when the object header was loaded */
+    *nlinks = oh->link_msgs_seen;
+
+done:
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_nlinks() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_obj_create
+ *
+ * Purpose:	Creates an object, in an abstract manner.
+ *
+ * Return:	Success:	Pointer to object opened
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *		April 9 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+void *
+H5O_obj_create(H5F_t *f, H5O_type_t obj_type, void *crt_info, H5G_loc_t *obj_loc)
+{
+    size_t u;                           /* Local index variable */
+    void *ret_value = NULL;             /* Return value */
+
+    FUNC_ENTER_NOAPI(NULL)
+
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(obj_type >= H5O_TYPE_GROUP && obj_type <= H5O_TYPE_NAMED_DATATYPE);
+    HDassert(crt_info);
+    HDassert(obj_loc);
+
+    /* Iterate through the object classes */
+    for(u = 0; u < NELMTS(H5O_obj_class_g); u++) {
+        /* Check for correct type of object to create */
+	if(H5O_obj_class_g[u]->type == obj_type) {
+            /* Call the object class's 'create' routine */
+            HDassert(H5O_obj_class_g[u]->create);
+            if(NULL == (ret_value = H5O_obj_class_g[u]->create(f, crt_info, obj_loc)))
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, NULL, "unable to open object")
+
+            /* Break out of loop */
+            break;
+        } /* end if */
+    } /* end for */
+    HDassert(ret_value);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_obj_create() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_oh_addr
+ *
+ * Purpose:	Retrieve the address of the object header
+ *
+ * Note:	This routine participates in the "Inlining C struct access"
+ *		pattern, don't call it directly, use the appropriate macro
+ *		defined in H5Oprivate.h.
+ *
+ * Return:	Success:	Valid haddr_t
+ *		Failure:	HADDR_UNDEF
+ *
+ * Programmer:	Quincey Koziol
+ *		March 15 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+haddr_t
+H5O_get_oh_addr(const H5O_t *oh)
+{
+    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(oh);
+    HDassert(oh->chunk);
+
+    FUNC_LEAVE_NOAPI(oh->chunk[0].addr)
+} /* end H5O_get_oh_addr() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_rc_and_type
+ *
+ * Purpose:	Retrieve an object's reference count and type
+ *
+ * Return:	Success:	Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *		November  4 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_get_rc_and_type(const H5O_loc_t *loc, unsigned *rc, H5O_type_t *otype)
+{
+    H5O_t *oh = NULL;                   /* Object header */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Check args */
+    HDassert(loc);
+
+    /* Get the object header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
+
+    /* Set the object's reference count */
+    if(rc)
+        *rc = oh->nlink;
+
+    /* Retrieve the type of the object */
+    if(otype)
+        if(H5O__obj_type_real(oh, otype) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to determine object type")
+
+done:
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_get_rc_and_type() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5O__free_visit_visited
+ *
+ * Purpose:     Free the key for an object visited during a group traversal
+ *
+ * Return:      Non-negative on success, negative on failure
+ *
+ * Programmer:  Quincey Koziol
+ *	        Nov 25, 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__free_visit_visited(void *item, void H5_ATTR_UNUSED *key, void H5_ATTR_UNUSED *operator_data/*in,out*/)
+{
+    FUNC_ENTER_STATIC_NOERR
+
+    item = H5FL_FREE(H5_obj_t, item);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5O__free_visit_visited() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__visit_cb
+ *
+ * Purpose:     Callback function for recursively visiting objects from a group
+ *
+ * Return:	Success:        Non-negative
+ *		Failure:	Negative
+ *
+ * Programmer:	Quincey Koziol
+ *	        Nov 25, 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__visit_cb(hid_t H5_ATTR_UNUSED group, const char *name, const H5L_info_t *linfo,
+    void *_udata)
+{
+    H5O_iter_visit_ud_t *udata = (H5O_iter_visit_ud_t *)_udata;     /* User data for callback */
+    H5G_loc_t   obj_loc;                /* Location of object */
+    H5G_name_t  obj_path;            	/* Object's group hier. path */
+    H5O_loc_t   obj_oloc;            	/* Object's object location */
+    hbool_t     obj_found = FALSE;      /* Object at 'name' found */
+    herr_t ret_value = H5_ITER_CONT;    /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity check */
+    HDassert(name);
+    HDassert(linfo);
+    HDassert(udata);
+
+    /* Check if this is a hard link */
+    if(linfo->type == H5L_TYPE_HARD) {
+        H5_obj_t obj_pos;       /* Object "position" for this object */
+
+        /* Set up opened group location to fill in */
+        obj_loc.oloc = &obj_oloc;
+        obj_loc.path = &obj_path;
+        H5G_loc_reset(&obj_loc);
+
+        /* Find the object using the LAPL passed in */
+        /* (Correctly handles mounted files) */
+        if(H5G_loc_find(udata->start_loc, name, &obj_loc/*out*/) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, H5_ITER_ERROR, "object not found")
+        obj_found = TRUE;
+
+        /* Construct unique "position" for this object */
+        H5F_GET_FILENO(obj_oloc.file, obj_pos.fileno);
+        obj_pos.addr = obj_oloc.addr;
+
+        /* Check if we've seen the object the link references before */
+        if(NULL == H5SL_search(udata->visited, &obj_pos)) {
+            H5O_info_t oinfo;           /* Object info */
+
+            /* Get the object's info */
+            if(H5O_get_info(&obj_oloc, TRUE, &oinfo) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, H5_ITER_ERROR, "unable to get object info")
+
+            /* Make the application callback */
+            ret_value = (udata->op)(udata->obj_id, name, &oinfo, udata->op_data);
+
+            /* Check for continuing to visit objects */
+            if(ret_value == H5_ITER_CONT) {
+                /* If its ref count is > 1, we add it to the list of visited objects */
+                /* (because it could come up again during traversal) */
+                if(oinfo.rc > 1) {
+                    H5_obj_t *new_node;                  /* New object node for visited list */
+
+                    /* Allocate new object "position" node */
+                    if((new_node = H5FL_MALLOC(H5_obj_t)) == NULL)
+                        HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, H5_ITER_ERROR, "can't allocate object node")
+
+                    /* Set node information */
+                    *new_node = obj_pos;
+
+                    /* Add to list of visited objects */
+                    if(H5SL_insert(udata->visited, new_node, new_node) < 0)
+                        HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "can't insert object node into visited list")
+                } /* end if */
+            } /* end if */
+        } /* end if */
+    } /* end if */
+
+done:
+    /* Release resources */
+    if(obj_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, H5_ITER_ERROR, "can't free location")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__visit_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__visit
+ *
+ * Purpose:	Recursively visit an object and all the objects reachable
+ *              from it.  If the starting object is a group, all the objects
+ *              linked to from that group will be visited.  Links within
+ *              each group are visited according to the order within the
+ *              specified index (unless the specified index does not exist for
+ *              a particular group, then the "name" index is used).
+ *
+ *              NOTE: Soft links and user-defined links are ignored during
+ *              this operation.
+ *
+ *              NOTE: Each _object_ reachable from the initial group will only
+ *              be visited once.  If multiple hard links point to the same
+ *              object, the first link to the object's path (according to the
+ *              iteration index and iteration order given) will be used to in
+ *              the callback about the object.
+ *
+ * Return:	Success:	The return value of the first operator that
+ *				returns non-zero, or zero if all members were
+ *				processed with no operator returning non-zero.
+ *
+ *		Failure:	Negative if something goes wrong within the
+ *				library, or the negative value returned by one
+ *				of the operators.
+ *
+ * Programmer:	Quincey Koziol
+ *		November 24 2007
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
+    H5_iter_order_t order, H5O_iterate_t op, void *op_data)
+{
+    H5O_iter_visit_ud_t udata;  /* User data for callback */
+    H5G_loc_t	loc;            /* Location of reference object */
+    H5G_loc_t   obj_loc;        /* Location used to open object */
+    H5G_name_t  obj_path;       /* Opened object group hier. path */
+    H5O_loc_t   obj_oloc;       /* Opened object object location */
+    hbool_t     loc_found = FALSE;      /* Entry at 'name' found */
+    H5O_info_t  oinfo;          /* Object info struct */
+    hid_t       obj_id = (-1);  /* ID of object */
+    herr_t      ret_value = FAIL;       /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Portably initialize user data struct to zeros */
+    HDmemset(&udata, 0, sizeof(udata));
+
+    /* Check args */
+    if(H5G_loc(loc_id, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+
+    /* Set up opened group location to fill in */
+    obj_loc.oloc = &obj_oloc;
+    obj_loc.path = &obj_path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object's location */
+    if(H5G_loc_find(&loc, obj_name, &obj_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "object not found")
+    loc_found = TRUE;
+
+    /* Get the object's info */
+    if(H5O_get_info(&obj_oloc, TRUE, &oinfo) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "unable to get object info")
+
+    /* Open the object */
+    /* (Takes ownership of the obj_loc information) */
+    if((obj_id = H5O__open_by_loc(&obj_loc, TRUE)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open object")
+
+    /* Make callback for starting object */
+    if((ret_value = op(obj_id, ".", &oinfo, op_data)) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "can't visit objects")
+
+    /* Check return value of first callback */
+    if(ret_value != H5_ITER_CONT)
+        HGOTO_DONE(ret_value);
+
+    /* Check for object being a group */
+    if(oinfo.type == H5O_TYPE_GROUP) {
+        H5G_loc_t	start_loc;          /* Location of starting group */
+
+        /* Get the location of the starting group */
+        if(H5G_loc(obj_id, &start_loc) < 0)
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+
+        /* Set up user data for visiting links */
+        udata.obj_id = obj_id;
+        udata.start_loc = &start_loc;
+        udata.op = op;
+        udata.op_data = op_data;
+
+        /* Create skip list to store visited object information */
+        if((udata.visited = H5SL_create(H5SL_TYPE_OBJ, NULL)) == NULL)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTCREATE, FAIL, "can't create skip list for visited objects")
+
+        /* If its ref count is > 1, we add it to the list of visited objects */
+        /* (because it could come up again during traversal) */
+        if(oinfo.rc > 1) {
+            H5_obj_t *obj_pos;                  /* New object node for visited list */
+
+            /* Allocate new object "position" node */
+            if((obj_pos = H5FL_MALLOC(H5_obj_t)) == NULL)
+                HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "can't allocate object node")
+
+            /* Construct unique "position" for this object */
+            obj_pos->fileno = oinfo.fileno;
+            obj_pos->addr = oinfo.addr;
+
+            /* Add to list of visited objects */
+            if(H5SL_insert(udata.visited, obj_pos, obj_pos) < 0)
+                HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "can't insert object node into visited list")
+        } /* end if */
+
+        /* Call internal group visitation routine */
+        if((ret_value = H5G_visit(obj_id, ".", idx_type, order, H5O__visit_cb, &udata)) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_BADITER, FAIL, "object visitation failed")
+    } /* end if */
+
+done:
+    if(obj_id > 0) {
+        if(H5I_dec_app_ref(obj_id) < 0)
+            HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "unable to close object")
+    } /* end if */
+    else if(loc_found && H5G_loc_free(&obj_loc) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't free location")
+    if(udata.visited)
+        H5SL_destroy(udata.visited, H5O__free_visit_visited, NULL);
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5O__visit() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__inc_rc
+ *
+ * Purpose:	Increments the reference count on an object header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__inc_rc(H5O_t *oh)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* check args */
+    HDassert(oh);
+
+    /* Pin the object header when the reference count goes above 0 */
+    if(oh->rc == 0)
+        if(H5AC_pin_protected_entry(oh) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
+
+    /* Increment reference count */
+    oh->rc++;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__inc_rc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__dec_rc
+ *
+ * Purpose:	Decrements the reference count on an object header
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Jul 13 2008
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__dec_rc(H5O_t *oh)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* check args */
+    HDassert(oh);
+
+    /* Decrement reference count */
+    oh->rc--;
+
+    /* Unpin the object header when the reference count goes back to 0 */
+    if(oh->rc == 0)
+        if(H5AC_unpin_entry(oh) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPIN, FAIL, "unable to unpin object header")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__dec_rc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:   H5O_dec_rc_by_loc
+ *
+ * Purpose:    Decrement the refcount of an object header, using its
+ *              object location information.
+ *
+ * Return:     Non-negative on success/Negative on failure
+ *
+ * Programmer: Quincey Koziol
+ *             koziol@hdfgroup.org
+ *             Oct 08 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O_dec_rc_by_loc(const H5O_loc_t *loc)
+{
+    H5O_t       *oh = NULL;             /* Object header */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* check args */
+    HDassert(loc);
+
+    /* Get header */
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
+       HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
+
+    /* Decrement the reference count on the object header */
+    /* (which will unpin it, if appropriate) */
+    if(H5O__dec_rc(oh) < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement reference count on object header")
+
+done:
+    /* Release the object header from the cache */
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_dec_rc_by_loc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O_get_proxy
+ *
+ * Purpose:	Retrieve the proxy for the object header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		July 24 2016
+ *
+ *-------------------------------------------------------------------------
+ */
+H5AC_proxy_entry_t *
+H5O_get_proxy(const H5O_t *oh)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    /* Check args */
+    HDassert(oh);
+
+    FUNC_LEAVE_NOAPI(oh->proxy)
+} /* end H5O_get_proxy() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5O__free
+ *
+ * Purpose:	Destroys an object header.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@ncsa.uiuc.edu
+ *		Jan 15 2003
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5O__free(H5O_t *oh)
+{
+    unsigned	u;                      /* Local index variable */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* check args */
+    HDassert(oh);
+    HDassert(0 == oh->rc);
+
+    /* Destroy chunks */
+    if(oh->chunk) {
+        for(u = 0; u < oh->nchunks; u++)
+            oh->chunk[u].image = H5FL_BLK_FREE(chunk_image, oh->chunk[u].image);
+
+        oh->chunk = (H5O_chunk_t *)H5FL_SEQ_FREE(H5O_chunk_t, oh->chunk);
+    } /* end if */
+
+    /* Destroy messages */
+    if(oh->mesg) {
+        for(u = 0; u < oh->nmesgs; u++) {
+#ifndef NDEBUG
+            /* Verify that message is clean, unless it could have been marked
+             * dirty by decoding */
+            if(oh->ndecode_dirtied && oh->mesg[u].dirty)
+                oh->ndecode_dirtied--;
+            else
+                HDassert(oh->mesg[u].dirty == 0);
+#endif /* NDEBUG */
+
+            H5O__msg_free_mesg(&oh->mesg[u]);
+        } /* end for */
+
+        /* Make sure we accounted for all the messages dirtied by decoding */
+        HDassert(!oh->ndecode_dirtied);
+
+        oh->mesg = (H5O_mesg_t *)H5FL_SEQ_FREE(H5O_mesg_t, oh->mesg);
+    } /* end if */
+
+    /* Destroy the proxy */
+    if(oh->proxy)
+        if(H5AC_proxy_entry_dest(oh->proxy) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to destroy virtual entry used for proxy")
+
+    /* destroy object header */
+    oh = H5FL_FREE(H5O_t, oh);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__free() */
+
diff --git a/src/H5Olayout.c b/src/H5Olayout.c
index b7a2584..d8f05f0 100644
--- a/src/H5Olayout.c
+++ b/src/H5Olayout.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Robb Matzke <matzke@llnl.gov>
@@ -35,25 +33,23 @@
 
 /* Local macros */
 
-/* Version # of encoded virtual dataset global heap blocks */
-#define H5O_LAYOUT_VDS_GH_ENC_VERS      0
-
 
 /* PRIVATE PROTOTYPES */
-static void *H5O__layout_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__layout_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O__layout_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O__layout_copy(const void *_mesg, void *_dest);
 static size_t H5O__layout_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
 static herr_t H5O__layout_reset(void *_mesg);
 static herr_t H5O__layout_free(void *_mesg);
-static herr_t H5O__layout_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    void *_mesg);
+static herr_t H5O__layout_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
+static herr_t H5O__layout_pre_copy_file(H5F_t *file_src, const void *mesg_src,
+    hbool_t *deleted, const H5O_copy_t *cpy_info, void *udata);
 static void *H5O__layout_copy_file(H5F_t *file_src, void *mesg_src,
     H5F_t *file_dst, hbool_t *recompute_size, unsigned *mesg_flags,
-    H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-static herr_t H5O__layout_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-    FILE * stream, int indent, int fwidth);
+    H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__layout_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_LAYOUT[1] = {{
@@ -71,7 +67,7 @@ const H5O_msg_class_t H5O_MSG_LAYOUT[1] = {{
     NULL,                       /* link method                          */
     NULL,                       /* set share method                     */
     NULL,                       /* can share method                     */
-    NULL,                       /* pre copy native value to file        */
+    H5O__layout_pre_copy_file,  /* pre copy native value to file        */
     H5O__layout_copy_file,      /* copy native value to file            */
     NULL,                       /* post copy native value to file       */
     NULL,                       /* get creation index                   */
@@ -100,8 +96,9 @@ H5FL_DEFINE(H5O_layout_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O__layout_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_layout_t           *mesg = NULL;
     uint8_t                *heap_block = NULL;
@@ -397,7 +394,7 @@ H5O__layout_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED
                     size_t i;
 
                     /* Read heap */
-                    if(NULL == (heap_block = (uint8_t *)H5HG_read(f, dxpl_id, &(mesg->storage.u.virt.serial_list_hobjid), NULL, &block_size)))
+                    if(NULL == (heap_block = (uint8_t *)H5HG_read(f, &(mesg->storage.u.virt.serial_list_hobjid), NULL, &block_size)))
                         HGOTO_ERROR(H5E_OHDR, H5E_READERROR, NULL, "Unable to read global heap block")
 
                     heap_block_p = (const uint8_t *)heap_block;
@@ -552,8 +549,6 @@ static herr_t
 H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, const void *_mesg)
 {
     const H5O_layout_t     *mesg = (const H5O_layout_t *) _mesg;
-    uint8_t                *heap_block = NULL;
-    size_t                  *str_size = NULL;
     unsigned               u;
     herr_t ret_value = SUCCEED;   /* Return value */
 
@@ -678,106 +673,9 @@ H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p,
             break;
 
         case H5D_VIRTUAL:
-            /* Create heap block if it has not been created yet */
-            /* Note that we assume here that the contents of the heap block
-             * cannot change!  If this ever stops being the case we must change
-             * this code to allow overwrites of the heap block.  -NAF */
-            if((mesg->storage.u.virt.serial_list_hobjid.addr == HADDR_UNDEF)
-                    && (mesg->storage.u.virt.list_nused > 0)) {
-                uint8_t *heap_block_p;
-                size_t block_size;
-                hssize_t select_serial_size;
-                hsize_t tmp_hsize;
-                uint32_t chksum;
-                size_t i;
-
-                /* Allocate array for caching results of strlen */
-                if(NULL == (str_size = (size_t *)H5MM_malloc(2 * mesg->storage.u.virt.list_nused *sizeof(size_t))))
-                    HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, FAIL, "unable to allocate string length array")
-
-                /*
-                 * Calculate heap block size
-                 */
-                /* Version and number of entries */
-                block_size = (size_t)1 + H5F_SIZEOF_SIZE(f);
-
-                /* Calculate size of each entry */
-                for(i = 0; i < mesg->storage.u.virt.list_nused; i++) {
-                    HDassert(mesg->storage.u.virt.list[i].source_file_name);
-                    HDassert(mesg->storage.u.virt.list[i].source_dset_name);
-                    HDassert(mesg->storage.u.virt.list[i].source_select);
-                    HDassert(mesg->storage.u.virt.list[i].source_dset.virtual_select);
-
-                    /* Source file name */
-                    str_size[2 * i] = HDstrlen(mesg->storage.u.virt.list[i].source_file_name) + (size_t)1;
-                    block_size += str_size[2 * i];
-
-                    /* Source dset name */
-                    str_size[(2 * i) + 1] = HDstrlen(mesg->storage.u.virt.list[i].source_dset_name) + (size_t)1;
-                    block_size += str_size[(2 * i) + 1];
-
-                    /* Source selection */
-                    if((select_serial_size = H5S_SELECT_SERIAL_SIZE(mesg->storage.u.virt.list[i].source_select)) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTENCODE, FAIL, "unable to check dataspace selection size")
-                    block_size += (size_t)select_serial_size;
-
-                    /* Virtual dataset selection */
-                    if((select_serial_size = H5S_SELECT_SERIAL_SIZE(mesg->storage.u.virt.list[i].source_dset.virtual_select)) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTENCODE, FAIL, "unable to check dataspace selection size")
-                    block_size += (size_t)select_serial_size;
-                } /* end for */
-
-                /* Checksum */
-                block_size += 4;
-
-                /* Allocate heap block */
-                if(NULL == (heap_block = (uint8_t *)H5MM_malloc(block_size)))
-                    HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, FAIL, "unable to allocate heap block")
-
-                /*
-                 * Encode heap block
-                 */
-                heap_block_p = heap_block;
-
-                /* Encode heap block encoding version */
-                *heap_block_p++ = (uint8_t)H5O_LAYOUT_VDS_GH_ENC_VERS;
-
-                /* Number of entries */
-                tmp_hsize = (hsize_t)mesg->storage.u.virt.list_nused;
-                H5F_ENCODE_LENGTH(f, heap_block_p, tmp_hsize)
-
-                /* Encode each entry */
-                for(i = 0; i < mesg->storage.u.virt.list_nused; i++) {
-                    /* Source file name */
-                    (void)HDmemcpy((char *)heap_block_p, mesg->storage.u.virt.list[i].source_file_name, str_size[2 * i]);
-                    heap_block_p += str_size[2 * i];
-
-                    /* Source dataset name */
-                    (void)HDmemcpy((char *)heap_block_p, mesg->storage.u.virt.list[i].source_dset_name, str_size[(2 * i) + 1]);
-                    heap_block_p += str_size[(2 * i) + 1];
-
-                    /* Source selection */
-                    if(H5S_SELECT_SERIALIZE(mesg->storage.u.virt.list[i].source_select, &heap_block_p) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to serialize source selection")
-
-                    /* Virtual selection */
-                    if(H5S_SELECT_SERIALIZE(mesg->storage.u.virt.list[i].source_dset.virtual_select, &heap_block_p) < 0)
-                        HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to serialize virtual selection")
-                } /* end for */
-
-                /* Checksum */
-                chksum = H5_checksum_metadata(heap_block, block_size - (size_t)4, 0);
-                UINT32ENCODE(heap_block_p, chksum)
-
-                /* Insert block into global heap */
-                if(H5HG_insert(f, H5AC_ind_read_dxpl_id, block_size, heap_block, &((H5O_layout_t *)mesg)->storage.u.virt.serial_list_hobjid) < 0) /* Casting away const OK  --NAF */
-                    HGOTO_ERROR(H5E_OHDR, H5E_CANTINSERT, FAIL, "unable to insert virtual dataset heap block")
-            } /* end if */
-
-            /* Heap information */
+            /* Encode heap ID for VDS info */
             H5F_addr_encode(f, &p, mesg->storage.u.virt.serial_list_hobjid.addr);
             UINT32ENCODE(p, mesg->storage.u.virt.serial_list_hobjid.idx);
-
             break;
 
         case H5D_LAYOUT_ERROR:
@@ -787,9 +685,6 @@ H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p,
     } /* end switch */
 
 done:
-    heap_block = (uint8_t *)H5MM_xfree(heap_block);
-    str_size = (size_t *)H5MM_xfree(str_size);
-
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O__layout_encode() */
 
@@ -999,7 +894,7 @@ H5O__layout_free(void *_mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O__layout_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
+H5O__layout_delete(H5F_t *f, H5O_t *open_oh, void *_mesg)
 {
     H5O_layout_t *mesg = (H5O_layout_t *) _mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
@@ -1019,19 +914,19 @@ H5O__layout_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
 
         case H5D_CONTIGUOUS:    /* Contiguous block on disk */
             /* Free the file space for the raw data */
-            if(H5D__contig_delete(f, dxpl_id, &mesg->storage) < 0)
+            if(H5D__contig_delete(f, &mesg->storage) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free raw data")
             break;
 
         case H5D_CHUNKED:       /* Chunked blocks on disk */
             /* Free the file space for the index & chunk raw data */
-            if(H5D__chunk_delete(f, dxpl_id, open_oh, &mesg->storage) < 0)
+            if(H5D__chunk_delete(f, open_oh, &mesg->storage) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free raw data")
             break;
 
         case H5D_VIRTUAL:       /* Virtual dataset */
             /* Free the file space virtual dataset */
-            if(H5D__virtual_delete(f, dxpl_id, &mesg->storage) < 0)
+            if(H5D__virtual_delete(f, &mesg->storage) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free raw data")
             break;
 
@@ -1047,6 +942,42 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5O__layout_pre_copy_file
+ *
+ * Purpose:     Perform any necessary actions before copying message between
+ *              files.
+ *
+ * Return:      Success:        Non-negative
+ *              Failure:        Negative
+ *
+ * Programmer:  Vailin Choi; Dec 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5O__layout_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void *mesg_src,
+    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t *cpy_info, void H5_ATTR_UNUSED *udata)
+{
+    const H5O_layout_t *layout_src = (const H5O_layout_t *)mesg_src;  /* Source layout */
+    herr_t ret_value = SUCCEED;   /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* check args */
+    HDassert(cpy_info);
+    HDassert(cpy_info->file_dst);
+
+    /* Check to ensure that the version of the message to be copied does not exceed
+       the message version allowed by the destination file's high bound */
+    if(layout_src->version > H5O_layout_ver_bounds[H5F_HIGH_BOUND(cpy_info->file_dst)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "layout message version out of bounds")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O__layout_pre_copy_file() */
+
+
+/*-------------------------------------------------------------------------
  * Function:    H5O__layout_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
@@ -1063,7 +994,7 @@ done:
 static void *
 H5O__layout_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
     hbool_t H5_ATTR_UNUSED *recompute_size, unsigned H5_ATTR_UNUSED *mesg_flags,
-    H5O_copy_t *cpy_info, void *_udata, hid_t dxpl_id)
+    H5O_copy_t *cpy_info, void *_udata)
 {
     H5D_copy_file_ud_t *udata = (H5D_copy_file_ud_t *)_udata;   /* Dataset copying user data */
     H5O_layout_t       *layout_src = (H5O_layout_t *) mesg_src;
@@ -1087,7 +1018,7 @@ H5O__layout_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
         case H5D_COMPACT:
             if(layout_src->storage.u.compact.buf) {
                 /* copy compact raw data */
-                if(H5D__compact_copy(file_src, &layout_src->storage.u.compact, file_dst, &layout_dst->storage.u.compact, udata->src_dtype, cpy_info, dxpl_id) < 0)
+                if(H5D__compact_copy(file_src, &layout_src->storage.u.compact, file_dst, &layout_dst->storage.u.compact, udata->src_dtype, cpy_info) < 0)
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "unable to copy chunked storage")
                 copied = TRUE;
             } /* end if */
@@ -1104,7 +1035,7 @@ H5O__layout_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
 
             if(H5D__contig_is_space_alloc(&layout_src->storage)) {
                 /* copy contiguous raw data */
-                if(H5D__contig_copy(file_src, &layout_src->storage.u.contig, file_dst, &layout_dst->storage.u.contig, udata->src_dtype, cpy_info, dxpl_id) < 0)
+                if(H5D__contig_copy(file_src, &layout_src->storage.u.contig, file_dst, &layout_dst->storage.u.contig, udata->src_dtype, cpy_info) < 0)
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "unable to copy contiguous storage")
                 copied = TRUE;
             } /* end if */
@@ -1113,7 +1044,7 @@ H5O__layout_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
         case H5D_CHUNKED:
             if(H5D__chunk_is_space_alloc(&layout_src->storage)) {
                 /* Create chunked layout */
-                if(H5D__chunk_copy(file_src, &layout_src->storage.u.chunk, &layout_src->u.chunk, file_dst, &layout_dst->storage.u.chunk, udata->src_space_extent, udata->src_dtype, udata->common.src_pline, cpy_info, dxpl_id) < 0)
+                if(H5D__chunk_copy(file_src, &layout_src->storage.u.chunk, &layout_src->u.chunk, file_dst, &layout_dst->storage.u.chunk, udata->src_space_extent, udata->src_dtype, udata->common.src_pline, cpy_info) < 0)
                     HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "unable to copy chunked storage")
                 copied = TRUE;
             } /* end if */
@@ -1122,7 +1053,7 @@ H5O__layout_copy_file(H5F_t *file_src, void *mesg_src, H5F_t *file_dst,
         case H5D_VIRTUAL:
             /* Copy virtual layout.  Always copy so the memory fields get copied
              * properly. */
-            if(H5D__virtual_copy(file_dst, layout_dst, dxpl_id) < 0)
+            if(H5D__virtual_copy(file_dst, layout_dst) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "unable to copy virtual storage")
             break;
 
@@ -1161,8 +1092,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O__layout_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg,
-    FILE * stream, int indent, int fwidth)
+H5O__layout_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_layout_t     *mesg = (const H5O_layout_t *) _mesg;
     size_t                  u;
diff --git a/src/H5Olinfo.c b/src/H5Olinfo.c
index 62e63d4..4903d9f 100644
--- a/src/H5Olinfo.c
+++ b/src/H5Olinfo.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -38,22 +36,21 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_linfo_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__linfo_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_linfo_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_linfo_copy(const void *_mesg, void *_dest);
 static size_t H5O_linfo_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_linfo_free(void *_mesg);
-static herr_t H5O_linfo_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    void *_mesg);
-static void *H5O_linfo_copy_file(H5F_t *file_src, void *native_src,
-    H5F_t *file_dst, hbool_t *recompute_size, unsigned *mesg_flags,
-    H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-static herr_t H5O_linfo_post_copy_file(const H5O_loc_t *parent_src_oloc,
-    const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst,
-    unsigned *mesg_flags, hid_t dxpl_id, H5O_copy_t *cpy_info);
-static herr_t H5O_linfo_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-			     FILE * stream, int indent, int fwidth);
+static herr_t H5O__linfo_free(void *_mesg);
+static herr_t H5O__linfo_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
+static void *H5O__linfo_copy_file(H5F_t *file_src, void *native_src,
+        H5F_t *file_dst, hbool_t *recompute_size, unsigned *mesg_flags,
+        H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__linfo_post_copy_file(const H5O_loc_t *parent_src_oloc,
+        const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst,
+        unsigned *mesg_flags, H5O_copy_t *cpy_info);
+static herr_t H5O__linfo_debug(H5F_t *f, const void *_mesg,
+        FILE * stream, int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_LINFO[1] = {{
@@ -61,22 +58,22 @@ const H5O_msg_class_t H5O_MSG_LINFO[1] = {{
     "linfo",                 	/*message name for debugging    */
     sizeof(H5O_linfo_t),     	/*native message size           */
     0,				/* messages are sharable?       */
-    H5O_linfo_decode,        	/*decode message                */
+    H5O__linfo_decode,        	/*decode message                */
     H5O_linfo_encode,        	/*encode message                */
     H5O_linfo_copy,          	/*copy the native value         */
     H5O_linfo_size,          	/*size of symbol table entry    */
     NULL,                   	/*default reset method          */
-    H5O_linfo_free,	        /* free method			*/
-    H5O_linfo_delete,	        /* file delete method		*/
+    H5O__linfo_free,	        /* free method			*/
+    H5O__linfo_delete,	        /* file delete method		*/
     NULL,			/* link method			*/
     NULL, 			/*set share method		*/
     NULL,		    	/*can share method		*/
     NULL,			/* pre copy native value to file */
-    H5O_linfo_copy_file,	/* copy native value to file    */
-    H5O_linfo_post_copy_file,	/* post copy native value to file */
+    H5O__linfo_copy_file,	/* copy native value to file    */
+    H5O__linfo_post_copy_file,	/* post copy native value to file */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_linfo_debug          	/*debug the message             */
+    H5O__linfo_debug          	/*debug the message             */
 }};
 
 /* Current version of link info information */
@@ -92,7 +89,6 @@ typedef struct {
     const H5O_loc_t *src_oloc;          /* Source object location */
     H5O_loc_t *dst_oloc;                /* Destination object location */
     H5O_linfo_t *dst_linfo;             /* Destination object's link info message */
-    hid_t dxpl_id;                      /* DXPL for operation */
     H5O_copy_t  *cpy_info;              /* Information for copy operation */
 } H5O_linfo_postcopy_ud_t;
 
@@ -101,7 +97,7 @@ H5FL_DEFINE_STATIC(H5O_linfo_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_linfo_decode
+ * Function:    H5O__linfo_decode
  *
  * Purpose:     Decode a message and return a pointer to a newly allocated one.
  *
@@ -115,14 +111,15 @@ H5FL_DEFINE_STATIC(H5O_linfo_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_linfo_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__linfo_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_linfo_t	*linfo = NULL;  /* Link info */
     unsigned char index_flags;  /* Flags for encoding link index info */
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -134,7 +131,7 @@ H5O_linfo_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *o
 
     /* Allocate space for message */
     if(NULL == (linfo = H5FL_MALLOC(H5O_linfo_t)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Get the index flags for the group */
     index_flags = *p++;
@@ -173,7 +170,7 @@ done:
             linfo = H5FL_FREE(H5O_linfo_t, linfo);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_linfo_decode() */
+} /* end H5O__linfo_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -257,7 +254,7 @@ H5O_linfo_copy(const void *_mesg, void *_dest)
     /* check args */
     HDassert(linfo);
     if(!dest && NULL == (dest = H5FL_MALLOC(H5O_linfo_t)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* copy */
     *dest = *linfo;
@@ -307,9 +304,9 @@ H5O_linfo_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_linfo_free
+ * Function:	H5O__linfo_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -319,20 +316,20 @@ H5O_linfo_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_linfo_free(void *mesg)
+H5O__linfo_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_linfo_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_linfo_free() */
+} /* end H5O__linfo_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_linfo_delete
+ * Function:    H5O__linfo_delete
  *
  * Purpose:     Free file space referenced by message
  *
@@ -344,12 +341,12 @@ H5O_linfo_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_linfo_delete(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh, void *_mesg)
+H5O__linfo_delete(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, void *_mesg)
 {
     H5O_linfo_t *linfo = (H5O_linfo_t *)_mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -357,16 +354,16 @@ H5O_linfo_delete(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh, void *_
 
     /* If the group is using "dense" link storage, delete it */
     if(H5F_addr_defined(linfo->fheap_addr))
-        if(H5G__dense_delete(f, dxpl_id, linfo, TRUE) < 0)
+        if(H5G__dense_delete(f, linfo, TRUE) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free dense link storage")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_linfo_delete() */
+} /* end H5O__linfo_delete() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_linfo_copy_file
+ * Function:    H5O__linfo_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
  *
@@ -380,16 +377,16 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_linfo_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *native_src, H5F_t *file_dst,
+H5O__linfo_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *native_src, H5F_t *file_dst,
     hbool_t H5_ATTR_UNUSED *recompute_size, unsigned H5_ATTR_UNUSED *mesg_flags,
-    H5O_copy_t *cpy_info, void *_udata, hid_t dxpl_id)
+    H5O_copy_t *cpy_info, void *_udata)
 {
     H5O_linfo_t         *linfo_src = (H5O_linfo_t *) native_src;
     H5O_linfo_t         *linfo_dst = NULL;
     H5G_copy_file_ud_t *udata = (H5G_copy_file_ud_t *) _udata;
     void                *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__COPIED_TAG, NULL)
+    FUNC_ENTER_STATIC_TAG(H5AC__COPIED_TAG)
 
     /* check args */
     HDassert(linfo_src);
@@ -417,7 +414,7 @@ H5O_linfo_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *native_src, H5F_t *fil
          */
         if(H5F_addr_defined(linfo_src->fheap_addr)) {
             /* Create the dense link storage */
-            if(H5G__dense_create(file_dst, dxpl_id, linfo_dst, udata->common.src_pline) < 0)
+            if(H5G__dense_create(file_dst, linfo_dst, udata->common.src_pline) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "unable to create 'dense' form of new format group")
         } /* end if */
     } /* end else */
@@ -430,12 +427,12 @@ done:
         if(linfo_dst)
             linfo_dst = H5FL_FREE(H5O_linfo_t, linfo_dst);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
-} /* H5O_linfo_copy_file() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* H5O__linfo_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_linfo_post_copy_file_cb
+ * Function:	H5O__linfo_post_copy_file_cb
  *
  * Purpose:	Callback routine for copying links from src to dst file
  *              during "post copy" routine
@@ -450,35 +447,34 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_linfo_post_copy_file_cb(const H5O_link_t *src_lnk, void *_udata)
+H5O__linfo_post_copy_file_cb(const H5O_link_t *src_lnk, void *_udata)
 {
     H5O_linfo_postcopy_ud_t *udata = (H5O_linfo_postcopy_ud_t *)_udata;     /* 'User data' passed in */
     H5O_link_t dst_lnk;                 /* Destination link to insert */
     hbool_t dst_lnk_init = FALSE;       /* Whether the destination link is initialized */
     herr_t ret_value = H5_ITER_CONT;  /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check arguments */
     HDassert(src_lnk);
     HDassert(udata);
 
     /* Copy the link (and the object it points to) */
-    if(H5L_link_copy_file(udata->dst_oloc->file, udata->dxpl_id, src_lnk,
-            udata->src_oloc, &dst_lnk, udata->cpy_info) < 0)
+    if(H5L__link_copy_file(udata->dst_oloc->file, src_lnk, udata->src_oloc, &dst_lnk, udata->cpy_info) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy link")
     dst_lnk_init = TRUE;
 
-    /* Set metadata tag in dxpl_id */
-    H5_BEGIN_TAG(udata->dxpl_id, H5AC__COPIED_TAG, FAIL);
+    /* Set metadata tag in API context */
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Insert the new object in the destination file's group */
     /* (Doesn't increment the link count - that's already been taken care of for hard links) */
-    if(H5G__dense_insert(udata->dst_oloc->file, udata->dxpl_id, udata->dst_linfo, &dst_lnk) < 0)
+    if(H5G__dense_insert(udata->dst_oloc->file, udata->dst_linfo, &dst_lnk) < 0)
         HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to insert destination link")
 
-    /* Reset metadata tag in dxpl_id */
-    H5_END_TAG(FAIL);
+    /* Reset metadata tag in API context */
+    H5_END_TAG
 
 done:
     /* Check if the destination link has been initialized */
@@ -486,11 +482,11 @@ done:
         H5O_msg_reset(H5O_LINK_ID, &dst_lnk);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_linfo_post_copy_file_cb() */
+} /* end H5O__linfo_post_copy_file_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_linfo_post_copy_file
+ * Function:    H5O__linfo_post_copy_file
  *
  * Purpose:     Finish copying a message from between files
  *
@@ -502,15 +498,15 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_linfo_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
+H5O__linfo_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
     H5O_loc_t *dst_oloc, void *mesg_dst, unsigned H5_ATTR_UNUSED *mesg_flags,
-    hid_t dxpl_id, H5O_copy_t *cpy_info)
+    H5O_copy_t *cpy_info)
 {
     const H5O_linfo_t   *linfo_src = (const H5O_linfo_t *)mesg_src;
     H5O_linfo_t         *linfo_dst = (H5O_linfo_t *)mesg_dst;
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(src_oloc && src_oloc->file);
@@ -532,21 +528,20 @@ H5O_linfo_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
         udata.src_oloc = src_oloc;
         udata.dst_oloc = dst_oloc;
         udata.dst_linfo = linfo_dst;
-        udata.dxpl_id = dxpl_id;
         udata.cpy_info = cpy_info;
 
         /* Iterate over the links in the group, building a table of the link messages */
-        if(H5G__dense_iterate(src_oloc->file, dxpl_id, linfo_src, H5_INDEX_NAME, H5_ITER_NATIVE, (hsize_t)0, NULL, H5O_linfo_post_copy_file_cb, &udata) < 0)
+        if(H5G__dense_iterate(src_oloc->file, linfo_src, H5_INDEX_NAME, H5_ITER_NATIVE, (hsize_t)0, NULL, H5O__linfo_post_copy_file_cb, &udata) < 0)
             HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over links")
     } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_linfo_post_copy_file() */
+} /* H5O__linfo_post_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_linfo_debug
+ * Function:    H5O__linfo_debug
  *
  * Purpose:     Prints debugging info for a message.
  *
@@ -559,12 +554,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_linfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__linfo_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth)
 {
     const H5O_linfo_t       *linfo = (const H5O_linfo_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -590,5 +585,5 @@ H5O_linfo_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const voi
 
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_linfo_debug() */
+} /* end H5O__linfo_debug() */
 
diff --git a/src/H5Olink.c b/src/H5Olink.c
index fd4ee88..6447936 100644
--- a/src/H5Olink.c
+++ b/src/H5Olink.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -40,23 +38,23 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_link_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__link_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_link_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_link_copy(const void *_mesg, void *_dest);
 static size_t H5O_link_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_link_reset(void *_mesg);
-static herr_t H5O_link_free(void *_mesg);
+static herr_t H5O__link_reset(void *_mesg);
+static herr_t H5O__link_free(void *_mesg);
 static herr_t H5O_link_pre_copy_file(H5F_t *file_src, const void *mesg_src,
     hbool_t *deleted, const H5O_copy_t *cpy_info, void *udata);
-static void *H5O_link_copy_file(H5F_t *file_src, void *native_src,
+static void *H5O__link_copy_file(H5F_t *file_src, void *native_src,
     H5F_t *file_dst, hbool_t *recompute_size, unsigned *mesg_flags,
-    H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-static herr_t H5O_link_post_copy_file(const H5O_loc_t *src_oloc,
+    H5O_copy_t *cpy_info, void *udata);
+static herr_t H5O__link_post_copy_file(const H5O_loc_t *src_oloc,
     const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst,
-    unsigned *mesg_flags, hid_t dxpl_id, H5O_copy_t *cpy_info);
-static herr_t H5O_link_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-    FILE * stream, int indent, int fwidth);
+    unsigned *mesg_flags, H5O_copy_t *cpy_info);
+static herr_t H5O__link_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_LINK[1] = {{
@@ -64,22 +62,22 @@ const H5O_msg_class_t H5O_MSG_LINK[1] = {{
     "link",                 	/*message name for debugging    */
     sizeof(H5O_link_t),     	/*native message size           */
     0,				/* messages are sharable?       */
-    H5O_link_decode,        	/*decode message                */
+    H5O__link_decode,        	/*decode message                */
     H5O_link_encode,        	/*encode message                */
     H5O_link_copy,          	/*copy the native value         */
     H5O_link_size,          	/*size of symbol table entry    */
-    H5O_link_reset,		/* reset method			*/
-    H5O_link_free,	        /* free method			*/
+    H5O__link_reset,		/* reset method			*/
+    H5O__link_free,	        /* free method			*/
     H5O_link_delete,	       	/* file delete method		*/
     NULL,			/* link method			*/
     NULL, 			/*set share method		*/
     NULL,		    	/*can share method		*/
     H5O_link_pre_copy_file,	/* pre copy native value to file */
-    H5O_link_copy_file,		/* copy native value to file    */
-    H5O_link_post_copy_file,	/* post copy native value to file    */
+    H5O__link_copy_file,	/* copy native value to file    */
+    H5O__link_post_copy_file,	/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_link_debug          	/*debug the message             */
+    H5O__link_debug          	/*debug the message             */
 }};
 
 /* Current version of link information */
@@ -103,7 +101,7 @@ H5FL_DEFINE_STATIC(H5O_link_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_link_decode
+ * Function:    H5O__link_decode
  *
  * Purpose:     Decode a message and return a pointer to
  *              a newly allocated one.
@@ -119,15 +117,16 @@ H5FL_DEFINE_STATIC(H5O_link_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_link_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_link_t          *lnk = NULL;    /* Pointer to link message */
     size_t              len = 0;        /* Length of a string in the message */
     unsigned char       link_flags;     /* Flags for encoding link info */
     void                *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -264,7 +263,7 @@ done:
         } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_link_decode() */
+} /* end H5O__link_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -536,7 +535,7 @@ H5O_link_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_link_reset
+ * Function:	H5O__link_reset
  *
  * Purpose:	Frees resources within a message, but doesn't free
  *		the message itself.
@@ -549,11 +548,11 @@ H5O_link_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_link_reset(void *_mesg)
+H5O__link_reset(void *_mesg)
 {
     H5O_link_t *lnk = (H5O_link_t *)_mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     if(lnk) {
         /* Free information for link (but don't free link pointer) */
@@ -567,13 +566,13 @@ H5O_link_reset(void *_mesg)
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_link_reset() */
+} /* end H5O__link_reset() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_link_free
+ * Function:	H5O__link_free
  *
- * Purpose:	Free's the message contents and the message itself
+ * Purpose:	Frees the message contents and the message itself
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -583,20 +582,18 @@ H5O_link_reset(void *_mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_link_free(void *_mesg)
+H5O__link_free(void *_mesg)
 {
     H5O_link_t *lnk = (H5O_link_t *)_mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(lnk);
 
-    /* Free information for link */
-    H5O_link_reset(lnk);
     lnk = H5FL_FREE(H5O_link_t, lnk);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_link_free() */
+} /* end H5O__link_free() */
 
 
 /*-------------------------------------------------------------------------
@@ -612,7 +609,7 @@ H5O_link_free(void *_mesg)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_link_delete(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh, void *_mesg)
+H5O_link_delete(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, void *_mesg)
 {
     H5O_link_t *lnk = (H5O_link_t *)_mesg;
     herr_t ret_value = SUCCEED;   /* Return value */
@@ -635,7 +632,7 @@ H5O_link_delete(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh, void *_m
         oloc.addr = lnk->u.hard.addr;
 
         /* Decrement the ref count for the object */
-        if(H5O_link(&oloc, -1, dxpl_id) < 0)
+        if(H5O_link(&oloc, -1) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to decrement object link count")
     } /* end if */
     /* Perform the "delete" callback when a user-defined link is removed */
@@ -709,7 +706,7 @@ H5O_link_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSED
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_link_copy_file
+ * Function:    H5O__link_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
  *
@@ -723,14 +720,14 @@ H5O_link_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UNUSED
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_link_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *native_src, H5F_t H5_ATTR_UNUSED *file_dst,
+H5O__link_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *native_src, H5F_t H5_ATTR_UNUSED *file_dst,
     hbool_t H5_ATTR_UNUSED *recompute_size, unsigned H5_ATTR_UNUSED *mesg_flags,
-    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void H5_ATTR_UNUSED *udata, hid_t H5_ATTR_UNUSED dxpl_id)
+    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void H5_ATTR_UNUSED *udata)
 {
     H5O_link_t  *link_src = (H5O_link_t *)native_src;
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(link_src);
@@ -748,11 +745,11 @@ H5O_link_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *native_src, H5F_t H5_AT
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_link_copy_file() */
+} /* H5O__link_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_link_post_copy_file
+ * Function:    H5O__link_post_copy_file
  *
  * Purpose:     Finish copying a message from between files
  *
@@ -764,15 +761,15 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_link_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
+H5O__link_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
     H5O_loc_t *dst_oloc, void *mesg_dst, unsigned H5_ATTR_UNUSED *mesg_flags,
-    hid_t dxpl_id, H5O_copy_t *cpy_info)
+    H5O_copy_t *cpy_info)
 {
     const H5O_link_t    *link_src = (const H5O_link_t *)mesg_src;
     H5O_link_t          *link_dst = (H5O_link_t *)mesg_dst;
     herr_t              ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(link_src);
@@ -784,17 +781,16 @@ H5O_link_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
     HDassert(cpy_info->max_depth < 0 || cpy_info->curr_depth < cpy_info->max_depth);
 
     /* Copy the link (and the object it points to) */
-    if(H5L_link_copy_file(dst_oloc->file, dxpl_id, link_src, src_oloc, link_dst,
-            cpy_info) < 0)
+    if(H5L__link_copy_file(dst_oloc->file, link_src, src_oloc, link_dst, cpy_info) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy link")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_link_post_copy_file() */
+} /* H5O__link_post_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_link_debug
+ * Function:    H5O__link_debug
  *
  * Purpose:     Prints debugging info for a message.
  *
@@ -807,8 +803,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_link_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__link_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_link_t    *lnk = (const H5O_link_t *) _mesg;
     herr_t               ret_value = SUCCEED;          /* Return value */
@@ -875,5 +871,5 @@ H5O_link_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_link_debug() */
+} /* end H5O__link_debug() */
 
diff --git a/src/H5Omessage.c b/src/H5Omessage.c
index ff4c57c..930be9b 100644
--- a/src/H5Omessage.c
+++ b/src/H5Omessage.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -56,7 +54,6 @@
 /* User data for iteration while removing a message */
 typedef struct {
     H5F_t      *f;              /* Pointer to file for insertion */
-    hid_t dxpl_id;              /* DXPL during iteration */
     int sequence;               /* Sequence # to search for */
     unsigned nfailed;           /* # of failed message removals */
     H5O_operator_t op;          /* Callback routine for removal operations */
@@ -77,7 +74,7 @@ typedef struct {
 static herr_t H5O__msg_reset_real(const H5O_msg_class_t *type, void *native);
 static herr_t H5O__msg_remove_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
     unsigned sequence, unsigned *oh_modified, void *_udata/*in,out*/);
-static herr_t H5O__copy_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t idx,
+static herr_t H5O__copy_mesg(H5F_t *f, H5O_t *oh, size_t idx,
     const H5O_msg_class_t *type, const void *mesg, unsigned mesg_flags,
     unsigned update_flags);
 
@@ -115,7 +112,7 @@ static herr_t H5O__copy_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t idx,
  */
 herr_t
 H5O_msg_create(const H5O_loc_t *loc, unsigned type_id, unsigned mesg_flags,
-    unsigned update_flags, void *mesg, hid_t dxpl_id)
+    unsigned update_flags, void *mesg)
 {
     H5O_t *oh = NULL;                   /* Object header */
     herr_t ret_value = SUCCEED;         /* Return value */
@@ -129,11 +126,11 @@ H5O_msg_create(const H5O_loc_t *loc, unsigned type_id, unsigned mesg_flags,
     HDassert(mesg);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Go append message to object header */
-    if(H5O_msg_append_oh(loc->file, dxpl_id, oh, type_id, mesg_flags, update_flags, mesg) < 0)
+    if(H5O_msg_append_oh(loc->file, oh, type_id, mesg_flags, update_flags, mesg) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to append to object header")
 
 done:
@@ -162,7 +159,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_append_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
+H5O_msg_append_oh(H5F_t *f, H5O_t *oh, unsigned type_id,
     unsigned mesg_flags, unsigned update_flags, void *mesg)
 {
     const H5O_msg_class_t *type;        /* Original H5O class type for the ID */
@@ -181,7 +178,7 @@ H5O_msg_append_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
     HDassert(mesg);
 
     /* Append new message to object header */
-    if(H5O_msg_append_real(f, dxpl_id, oh, type, mesg_flags, update_flags, mesg) < 0)
+    if(H5O__msg_append_real(f, oh, type, mesg_flags, update_flags, mesg) < 0)
         HGOTO_ERROR(H5E_ATTR, H5E_CANTINSERT, FAIL, "unable to create new message in header")
 
 done:
@@ -190,7 +187,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_msg_append_real
+ * Function:	H5O__msg_append_real
  *
  * Purpose:	Append a new message to an object header.
  *
@@ -205,13 +202,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_append_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
+H5O__msg_append_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
     unsigned mesg_flags, unsigned update_flags, void *mesg)
 {
     size_t idx;                         /* Index of message to modify */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -221,11 +218,11 @@ H5O_msg_append_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *t
     HDassert(mesg);
 
     /* Allocate space for a new message */
-    if(H5O_msg_alloc(f, dxpl_id, oh, type, &mesg_flags, mesg, &idx) < 0)
+    if(H5O__msg_alloc(f, oh, type, &mesg_flags, mesg, &idx) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, FAIL, "unable to create new message")
 
     /* Copy the information for the message */
-    if(H5O__copy_mesg(f, dxpl_id, oh, idx, type, mesg, mesg_flags, update_flags) < 0)
+    if(H5O__copy_mesg(f, oh, idx, type, mesg, mesg_flags, update_flags) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to write message")
 #ifdef H5O_DEBUG
 H5O_assert(oh);
@@ -233,7 +230,7 @@ H5O_assert(oh);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_append_real() */
+} /* end H5O__msg_append_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -258,7 +255,7 @@ done:
  */
 herr_t
 H5O_msg_write(const H5O_loc_t *loc, unsigned type_id, unsigned mesg_flags,
-    unsigned update_flags, void *mesg, hid_t dxpl_id)
+    unsigned update_flags, void *mesg)
 {
     H5O_t *oh = NULL;                   /* Object header to use */
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
@@ -278,11 +275,11 @@ H5O_msg_write(const H5O_loc_t *loc, unsigned type_id, unsigned mesg_flags,
     HDassert(0 == (mesg_flags & ~H5O_MSG_FLAG_BITS));
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Call the "real" modify routine */
-    if(H5O_msg_write_real(loc->file, dxpl_id, oh, type, mesg_flags, update_flags, mesg) < 0)
+    if(H5O__msg_write_real(loc->file, oh, type, mesg_flags, update_flags, mesg) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to write object header message")
 
 done:
@@ -313,13 +310,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_write_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
-    unsigned mesg_flags, unsigned update_flags, void *mesg)
+H5O_msg_write_oh(H5F_t *f, H5O_t *oh, unsigned type_id, unsigned mesg_flags,
+    unsigned update_flags, void *mesg)
 {
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, oh->cache_info.addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(oh->cache_info.addr, FAIL)
 
     /* check args */
     HDassert(f);
@@ -332,16 +329,16 @@ H5O_msg_write_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
     HDassert(0 == (mesg_flags & ~H5O_MSG_FLAG_BITS));
 
     /* Call the "real" modify routine */
-    if(H5O_msg_write_real(f, dxpl_id, oh, type, mesg_flags, update_flags, mesg) < 0)
+    if(H5O__msg_write_real(f, oh, type, mesg_flags, update_flags, mesg) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to write object header message")
 
 done:
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5O_msg_write_oh() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_msg_write_real
+ * Function:	H5O__msg_write_real
  *
  * Purpose:	Modifies an existing message or creates a new message.
  *
@@ -361,14 +358,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_write_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
+H5O__msg_write_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
     unsigned mesg_flags, unsigned update_flags, void *mesg)
 {
     H5O_mesg_t         *idx_msg;        /* Pointer to message to modify */
     size_t		idx;            /* Index of message to modify */
     herr_t	        ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -410,7 +407,7 @@ H5O_msg_write_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *ty
          *      the location of the object changes (from in another object's
          *      header to the SOHM heap), so just delete it first -QAK)
          */
-        if(H5SM_delete(f, dxpl_id, oh, (H5O_shared_t *)idx_msg->native) < 0)
+        if(H5SM_delete(f, oh, (H5O_shared_t *)idx_msg->native) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete message from SOHM index")
 
         /* If we're replacing a shared message, the new message must be shared
@@ -420,14 +417,14 @@ H5O_msg_write_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *ty
          * XXX: This doesn't handle freeing extra space in object header from
          *      a message shrinking.
          */
-        if((status = H5SM_try_share(f, dxpl_id, ((mesg_flags & H5O_MSG_FLAG_SHARED) ? NULL : oh), 0, idx_msg->type->id, mesg, &mesg_flags)) < 0)
+        if((status = H5SM_try_share(f, ((mesg_flags & H5O_MSG_FLAG_SHARED) ? NULL : oh), 0, idx_msg->type->id, mesg, &mesg_flags)) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, FAIL, "error while trying to share message")
         if(status == FALSE && (mesg_flags & H5O_MSG_FLAG_SHARED))
             HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, FAIL, "message changed sharing status")
     } /* end if */
 
     /* Copy the information for the message */
-    if(H5O__copy_mesg(f, dxpl_id, oh, idx, type, mesg, mesg_flags, update_flags) < 0)
+    if(H5O__copy_mesg(f, oh, idx, type, mesg, mesg_flags, update_flags) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to write message")
 #ifdef H5O_DEBUG
 H5O_assert(oh);
@@ -435,7 +432,7 @@ H5O_assert(oh);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_write_real() */
+} /* end H5O__msg_write_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -462,13 +459,12 @@ done:
  *-------------------------------------------------------------------------
  */
 void *
-H5O_msg_read(const H5O_loc_t *loc, unsigned type_id, void *mesg,
-    hid_t dxpl_id)
+H5O_msg_read(const H5O_loc_t *loc, unsigned type_id, void *mesg)
 {
     H5O_t *oh = NULL;                   /* Object header to use */
     void *ret_value = NULL;             /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, NULL)
+    FUNC_ENTER_NOAPI_TAG(loc->addr, NULL)
 
     /* check args */
     HDassert(loc);
@@ -477,18 +473,18 @@ H5O_msg_read(const H5O_loc_t *loc, unsigned type_id, void *mesg,
     HDassert(type_id < NELMTS(H5O_msg_class_g));
 
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, NULL, "unable to protect object header")
 
     /* Call the "real" read routine */
-    if(NULL == (ret_value = H5O_msg_read_oh(loc->file, dxpl_id, oh, type_id, mesg)))
+    if(NULL == (ret_value = H5O_msg_read_oh(loc->file, oh, type_id, mesg)))
 	HGOTO_ERROR(H5E_OHDR, H5E_READERROR, NULL, "unable to read object header message")
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, NULL, "unable to release object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, NULL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5O_msg_read() */
 
 
@@ -516,8 +512,7 @@ done:
  *-------------------------------------------------------------------------
  */
 void *
-H5O_msg_read_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
-    void *mesg)
+H5O_msg_read_oh(H5F_t *f, H5O_t *oh, unsigned type_id, void *mesg)
 {
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
     unsigned       idx;                 /* Message's index in object header */
@@ -543,7 +538,7 @@ H5O_msg_read_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
      * Decode the message if necessary.  If the message is shared then retrieve
      * native message through the shared interface.
      */
-    H5O_LOAD_NATIVE(f, dxpl_id, 0, oh, &(oh->mesg[idx]), NULL)
+    H5O_LOAD_NATIVE(f, 0, oh, &(oh->mesg[idx]), NULL)
 
     /*
      * The object header caches the native message (along with
@@ -663,16 +658,16 @@ H5O_msg_free(unsigned type_id, void *mesg)
     HDassert(type);
 
     /* Call the "real" free routine */
-    ret_value = H5O_msg_free_real(type, mesg);
+    ret_value = H5O__msg_free_real(type, mesg);
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O_msg_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_msg_free_mesg
+ * Function:	H5O__msg_free_mesg
  *
- * Purpose:	Call H5O_msg_free_real() on a message.
+ * Purpose:	Call H5O__msg_free_real() on a message.
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -682,28 +677,27 @@ H5O_msg_free(unsigned type_id, void *mesg)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_free_mesg(H5O_mesg_t *mesg)
+H5O__msg_free_mesg(H5O_mesg_t *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_PACKAGE_NOERR
 
     /* check args */
     HDassert(mesg);
 
     /* Free any native information */
-    mesg->native = H5O_msg_free_real(mesg->type, mesg->native);
+    mesg->native = H5O__msg_free_real(mesg->type, mesg->native);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_msg_free_mesg() */
+} /* end H5O__msg_free_mesg() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_msg_free_real
+ * Function:	H5O__msg_free_real
  *
  * Purpose:	Similar to H5O_msg_reset() except it also frees the message
  *		pointer.
  *
  * Return:	Success:	NULL
- *
  *		Failure:	NULL
  *
  * Programmer:	Robb Matzke
@@ -712,9 +706,9 @@ H5O_msg_free_mesg(H5O_mesg_t *mesg)
  *-------------------------------------------------------------------------
  */
 void *
-H5O_msg_free_real(const H5O_msg_class_t *type, void *msg_native)
+H5O__msg_free_real(const H5O_msg_class_t *type, void *msg_native)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_PACKAGE_NOERR
 
     /* check args */
     HDassert(type);
@@ -728,7 +722,7 @@ H5O_msg_free_real(const H5O_msg_class_t *type, void *msg_native)
     } /* end if */
 
     FUNC_LEAVE_NOAPI(NULL)
-} /* end H5O_msg_free_real() */
+} /* end H5O__msg_free_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -785,7 +779,7 @@ done:
  *-------------------------------------------------------------------------
  */
 int
-H5O_msg_count(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id)
+H5O_msg_count(const H5O_loc_t *loc, unsigned type_id)
 {
     H5O_t *oh = NULL;           /* Object header to operate on */
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
@@ -803,7 +797,7 @@ H5O_msg_count(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id)
     HDassert(type);
 
     /* Load the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Count the messages of the correct type */
@@ -811,7 +805,7 @@ H5O_msg_count(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id)
     H5_CHECKED_ASSIGN(ret_value, int, msg_count, unsigned);
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -873,19 +867,19 @@ H5O_msg_count_real(const H5O_t *oh, const H5O_msg_class_t *type)
  *-------------------------------------------------------------------------
  */
 htri_t
-H5O_msg_exists(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id)
+H5O_msg_exists(const H5O_loc_t *loc, unsigned type_id)
 {
     H5O_t	*oh = NULL;             /* Object header for location */
     htri_t      ret_value = FAIL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, loc->addr, FAIL)
+    FUNC_ENTER_NOAPI_TAG(loc->addr, FAIL)
 
     HDassert(loc);
     HDassert(loc->file);
     HDassert(type_id < NELMTS(H5O_msg_class_g));
 
     /* Load the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Call the "real" exists routine */
@@ -893,10 +887,10 @@ H5O_msg_exists(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id)
 	HGOTO_ERROR(H5E_OHDR, H5E_READERROR, FAIL, "unable to verify object header message")
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5O_msg_exists() */
 
 
@@ -963,8 +957,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_remove(const H5O_loc_t *loc, unsigned type_id, int sequence, hbool_t adj_link,
-    hid_t dxpl_id)
+H5O_msg_remove(const H5O_loc_t *loc, unsigned type_id, int sequence, hbool_t adj_link)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
@@ -982,11 +975,11 @@ H5O_msg_remove(const H5O_loc_t *loc, unsigned type_id, int sequence, hbool_t adj
     HDassert(type);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Call the "real" remove routine */
-    if((ret_value = H5O_msg_remove_real(loc->file, oh, type, sequence, NULL, NULL, adj_link, dxpl_id)) < 0)
+    if((ret_value = H5O__msg_remove_real(loc->file, oh, type, sequence, NULL, NULL, adj_link)) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to remove object header message")
 
 done:
@@ -1016,7 +1009,7 @@ done:
  */
 herr_t
 H5O_msg_remove_op(const H5O_loc_t *loc, unsigned type_id, int sequence,
-    H5O_operator_t op, void *op_data, hbool_t adj_link, hid_t dxpl_id)
+    H5O_operator_t op, void *op_data, hbool_t adj_link)
 {
     H5O_t *oh = NULL;                   /* Pointer to actual object header */
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
@@ -1034,11 +1027,11 @@ H5O_msg_remove_op(const H5O_loc_t *loc, unsigned type_id, int sequence,
     HDassert(type);
 
     /* Pin the object header */
-    if(NULL == (oh = H5O_pin(loc, dxpl_id)))
+    if(NULL == (oh = H5O_pin(loc)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPIN, FAIL, "unable to pin object header")
 
     /* Call the "real" remove routine */
-    if((ret_value = H5O_msg_remove_real(loc->file, oh, type, sequence, op, op_data, adj_link, dxpl_id)) < 0)
+    if((ret_value = H5O__msg_remove_real(loc->file, oh, type, sequence, op, op_data, adj_link)) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to remove object header message")
 
 done:
@@ -1097,7 +1090,7 @@ H5O__msg_remove_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned sequence,
          * (OK to remove constant messages - QAK)
          */
         /* Convert message into a null message */
-        if(H5O_release_mesg(udata->f, udata->dxpl_id, oh, mesg, udata->adj_link) < 0)
+        if(H5O_release_mesg(udata->f, oh, mesg, udata->adj_link) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, H5_ITER_ERROR, "unable to release message")
 
         /* Indicate that the object header was modified */
@@ -1114,7 +1107,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_msg_remove_real
+ * Function:	H5O__msg_remove_real
  *
  * Purpose:	Removes the specified message from the object header.
  *		If sequence is H5O_ALL (-1) then all messages of the
@@ -1131,15 +1124,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
-    int sequence, H5O_operator_t app_op, void *op_data, hbool_t adj_link,
-    hid_t dxpl_id)
+H5O__msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    int sequence, H5O_operator_t app_op, void *op_data, hbool_t adj_link)
 {
     H5O_iter_rm_t udata;                /* User data for iterator */
     H5O_mesg_operator_t op;             /* Wrapper for operator */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -1152,7 +1144,6 @@ H5O_msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
 
     /* Set up iterator operator data */
     udata.f = f;
-    udata.dxpl_id = dxpl_id;
     udata.sequence = sequence;
     udata.nfailed = 0;
     udata.op = app_op;
@@ -1162,7 +1153,7 @@ H5O_msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
     /* Iterate over the messages, deleting appropriate one(s) */
     op.op_type = H5O_MESG_OP_LIB;
     op.u.lib_op = H5O__msg_remove_cb;
-    if(H5O_msg_iterate_real(f, oh, type, &op, &udata, dxpl_id) < 0)
+    if(H5O__msg_iterate_real(f, oh, type, &op, &udata) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "error iterating over messages")
 
     /* Fail if we tried to remove any constant messages */
@@ -1171,7 +1162,7 @@ H5O_msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_remove_real() */
+} /* end H5O__msg_remove_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -1207,7 +1198,7 @@ done:
  */
 herr_t
 H5O_msg_iterate(const H5O_loc_t *loc, unsigned type_id,
-    const H5O_mesg_operator_t *op, void *op_data, hid_t dxpl_id)
+    const H5O_mesg_operator_t *op, void *op_data)
 {
     H5O_t *oh = NULL;               /* Pointer to actual object header */
     const H5O_msg_class_t *type;    /* Actual H5O class type for the ID */
@@ -1225,15 +1216,15 @@ H5O_msg_iterate(const H5O_loc_t *loc, unsigned type_id,
     HDassert(op);
 
     /* Protect the object header to iterate over */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Call the "real" iterate routine */
-    if((ret_value = H5O_msg_iterate_real(loc->file, oh, type, op, op_data, dxpl_id)) < 0)
+    if((ret_value = H5O__msg_iterate_real(loc->file, oh, type, op, op_data)) < 0)
         HERROR(H5E_OHDR, H5E_BADITER, "unable to iterate over object header messages");
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1241,7 +1232,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_msg_iterate_real
+ * Function:	H5O__msg_iterate_real
  *
  * Purpose:	Iterate through object headers of a certain type.
  *
@@ -1272,8 +1263,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_iterate_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
-    const H5O_mesg_operator_t *op, void *op_data, hid_t dxpl_id)
+H5O__msg_iterate_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    const H5O_mesg_operator_t *op, void *op_data)
 {
     H5O_mesg_t         *idx_msg;        /* Pointer to current message */
     unsigned		idx;            /* Absolute index of current message in all messages */
@@ -1281,7 +1272,7 @@ H5O_msg_iterate_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
     unsigned 		oh_modified = 0;    	/* Whether the callback modified the object header */
     herr_t              ret_value = H5_ITER_CONT;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -1294,7 +1285,7 @@ H5O_msg_iterate_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
     for(sequence = 0, idx = 0, idx_msg = &oh->mesg[0]; idx < oh->nmesgs && !ret_value; idx++, idx_msg++) {
 	if(type == idx_msg->type) {
             /* Decode the message if necessary.  */
-            H5O_LOAD_NATIVE(f, dxpl_id, 0, oh, idx_msg, FAIL)
+            H5O_LOAD_NATIVE(f, 0, oh, idx_msg, FAIL)
 
             /* Check for making an "internal" (i.e. within the H5O package) callback */
             if(op->op_type == H5O_MESG_OP_LIB)
@@ -1324,11 +1315,11 @@ done:
          *  message removal)
          */
 	if(oh_modified & H5O_MODIFY_CONDENSE)
-	    if(H5O_condense_header(f, oh, dxpl_id) < 0)
+	    if(H5O_condense_header(f, oh) < 0)
 		HDONE_ERROR(H5E_OHDR, H5E_CANTPACK, FAIL, "can't pack object header")
 
         /* Mark object header as changed */
-        if(H5O_touch_oh(f, dxpl_id, oh, FALSE) < 0)
+        if(H5O_touch_oh(f, oh, FALSE) < 0)
             HDONE_ERROR(H5E_OHDR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
 
         /* Mark object header as dirty in cache */
@@ -1337,7 +1328,7 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_iterate_real() */
+} /* end H5O__msg_iterate_real() */
 
 
 /*-------------------------------------------------------------------------
@@ -1812,7 +1803,7 @@ done:
  *-------------------------------------------------------------------------
  */
 void *
-H5O_msg_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned type_id,
+H5O_msg_decode(H5F_t *f, H5O_t *open_oh, unsigned type_id, size_t buf_size,
     const unsigned char *buf)
 {
     const H5O_msg_class_t   *type;      /* Actual H5O class type for the ID */
@@ -1828,7 +1819,7 @@ H5O_msg_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned type_id,
     HDassert(type);
 
     /* decode */
-    if((ret_value = (type->decode)(f, dxpl_id, open_oh, 0, &ioflags, buf)) == NULL)
+    if(NULL == (ret_value = (type->decode)(f, open_oh, 0, &ioflags, buf_size, buf)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, NULL, "unable to decode message")
 
 done:
@@ -1837,7 +1828,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_msg_copy_file
+ * Function:    H5O__msg_copy_file
  *
  * Purpose:     Copies a message to file.  If MESG is is the null pointer then a null
  *              pointer is returned with no error.
@@ -1855,13 +1846,13 @@ done:
  *-------------------------------------------------------------------------
  */
 void *
-H5O_msg_copy_file(const H5O_msg_class_t *type, H5F_t *file_src,
+H5O__msg_copy_file(const H5O_msg_class_t *type, H5F_t *file_src,
     void *native_src, H5F_t *file_dst, hbool_t *recompute_size,
-    unsigned *mesg_flags, H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id)
+    unsigned *mesg_flags, H5O_copy_t *cpy_info, void *udata)
 {
     void *ret_value = NULL;             /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(type);
@@ -1875,16 +1866,16 @@ H5O_msg_copy_file(const H5O_msg_class_t *type, H5F_t *file_src,
     /* The copy_file callback will return an H5O_shared_t only if the message
      * to be copied is a committed datatype.
      */
-    if(NULL == (ret_value = (type->copy_file)(file_src, native_src, file_dst, recompute_size, mesg_flags, cpy_info, udata, dxpl_id)))
+    if(NULL == (ret_value = (type->copy_file)(file_src, native_src, file_dst, recompute_size, mesg_flags, cpy_info, udata)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "unable to copy object header message to file")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_copy_file() */
+} /* end H5O__msg_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_msg_alloc
+ * Function:	H5O__msg_alloc
  *
  * Purpose:	Create a new message in an object header
  *
@@ -1897,14 +1888,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
+H5O__msg_alloc(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
     unsigned *mesg_flags, void *native, size_t *mesg_idx)
 {
     size_t new_idx;             /* New index for message */
     htri_t shared_mesg;         /* Should this message be stored in the Shared Message table? */
     herr_t ret_value = SUCCEED; /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -1920,18 +1911,18 @@ H5O_msg_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
         HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, FAIL, "error determining if message is shared")
     else if(shared_mesg > 0) {
         /* Increment message's reference count */
-        if(type->link && (type->link)(f, dxpl_id, oh, native) < 0)
+        if(type->link && (type->link)(f, oh, native) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust shared message ref count")
         *mesg_flags |= H5O_MSG_FLAG_SHARED;
     } /* end if */
     else {
         /* Attempt to share message */
-        if(H5SM_try_share(f, dxpl_id, oh, 0, type->id, native, mesg_flags) < 0)
+        if(H5SM_try_share(f, oh, 0, type->id, native, mesg_flags) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "error determining if message should be shared")
     } /* end else */
 
     /* Allocate space in the object header for the message */
-    if(H5O_alloc(f, dxpl_id, oh, type, native, &new_idx) < 0)
+    if(H5O__alloc(f, oh, type, native, &new_idx) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTINIT, FAIL, "unable to allocate space for message")
 
     /* Get the message's "creation index", if it has one */
@@ -1946,7 +1937,7 @@ H5O_msg_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh, const H5O_msg_class_t *type,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_msg_alloc() */
+} /* end H5O__msg_alloc() */
 
 
 /*-------------------------------------------------------------------------
@@ -1963,9 +1954,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O__copy_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t idx,
-    const H5O_msg_class_t *type, const void *mesg, unsigned mesg_flags,
-    unsigned update_flags)
+H5O__copy_mesg(H5F_t *f, H5O_t *oh, size_t idx, const H5O_msg_class_t *type,
+    const void *mesg, unsigned mesg_flags, unsigned update_flags)
 {
     H5O_chunk_proxy_t *chk_proxy = NULL;        /* Chunk that message is in */
     H5O_mesg_t *idx_msg = &oh->mesg[idx];       /* Pointer to message to modify */
@@ -1982,7 +1972,7 @@ H5O__copy_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t idx,
     HDassert(mesg);
 
     /* Protect chunk */
-    if(NULL == (chk_proxy = H5O_chunk_protect(f, dxpl_id, oh, idx_msg->chunkno)))
+    if(NULL == (chk_proxy = H5O__chunk_protect(f, oh, idx_msg->chunkno)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header chunk")
 
     /* Reset existing native information for the header's message */
@@ -2000,18 +1990,18 @@ H5O__copy_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t idx,
     chk_dirtied = TRUE;
 
     /* Release chunk */
-    if(H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(H5O__chunk_unprotect(f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
     chk_proxy = NULL;
 
     /* Update the modification time, if requested */
     if(update_flags & H5O_UPDATE_TIME)
-        if(H5O_touch_oh(f, dxpl_id, oh, FALSE) < 0)
+        if(H5O_touch_oh(f, oh, FALSE) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTUPDATE, FAIL, "unable to update time on object")
 
 done:
     /* Release chunk, if not already released */
-    if(chk_proxy && H5O_chunk_unprotect(f, dxpl_id, chk_proxy, chk_dirtied) < 0)
+    if(chk_proxy && H5O__chunk_unprotect(f, chk_proxy, chk_dirtied) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header chunk")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2023,8 +2013,8 @@ done:
  *
  * Purpose:     Calls a message's delete callback.
  *
- *              This is mostly redundant with H5O_delete_mesg below,
- *              but H5O_delete_mesg only works on messages in object headers
+ *              This is mostly redundant with H5O__delete_mesg below,
+ *              but H5O__delete_mesg only works on messages in object headers
  *              (while the shared message code needs to delete messages in
  *              the heap).
  *
@@ -2041,8 +2031,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned type_id,
-    void *mesg)
+H5O_msg_delete(H5F_t *f, H5O_t *open_oh, unsigned type_id, void *mesg)
 {
     const H5O_msg_class_t   *type;      /* Actual H5O class type for the ID */
     herr_t ret_value = SUCCEED;                    /* Return value */
@@ -2056,7 +2045,7 @@ H5O_msg_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned type_id,
     HDassert(type);
 
     /* delete */
-    if((type->del) && (type->del)(f, dxpl_id, open_oh, mesg) < 0)
+    if((type->del) && (type->del)(f, open_oh, mesg) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
 
 done:
@@ -2065,7 +2054,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_delete_mesg
+ * Function:	H5O__delete_mesg
  *
  * Purpose:	Internal function to:
  *              Delete an object header message from a file.  This frees the file
@@ -2080,12 +2069,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_delete_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_mesg_t *mesg)
+H5O__delete_mesg(H5F_t *f, H5O_t *oh, H5O_mesg_t *mesg)
 {
     const H5O_msg_class_t *type = mesg->type;  /* Type of object to free */
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE
 
     /* Check args */
     HDassert(f);
@@ -2095,15 +2084,15 @@ H5O_delete_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5O_mesg_t *mesg)
     /* Check if there is a file space deletion callback for this type of message */
     if(type->del) {
         /* Decode the message if necessary. */
-        H5O_LOAD_NATIVE(f, dxpl_id, H5O_DECODEIO_NOCHANGE, oh, mesg, FAIL)
+        H5O_LOAD_NATIVE(f, H5O_DECODEIO_NOCHANGE, oh, mesg, FAIL)
 
-        if((type->del)(f, dxpl_id, oh, mesg->native) < 0)
+        if((type->del)(f, oh, mesg->native) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDELETE, FAIL, "unable to delete file space for object header message")
     } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_delete_mesg() */
+} /* end H5O__delete_mesg() */
 
 
 /*-------------------------------------------------------------------------
@@ -2266,7 +2255,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_msg_get_flags(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id, uint8_t *flags)
+H5O_msg_get_flags(const H5O_loc_t *loc, unsigned type_id, uint8_t *flags)
 {
     H5O_t *oh = NULL;                   /* Object header to use */
     const H5O_msg_class_t *type;        /* Actual H5O class type for the ID */
@@ -2285,7 +2274,7 @@ H5O_msg_get_flags(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id, uint8_t
     HDassert(type);
 
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Locate message of correct type */
@@ -2300,7 +2289,7 @@ H5O_msg_get_flags(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id, uint8_t
     *flags = idx_msg->flags;
 
 done:
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Omodule.h b/src/H5Omodule.h
index a8f1301..df3ab56 100644
--- a/src/H5Omodule.h
+++ b/src/H5Omodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Omtime.c b/src/H5Omtime.c
index c61fa66..db1d8d7 100644
--- a/src/H5Omtime.c
+++ b/src/H5Omtime.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:	Robb Matzke <matzke@llnl.gov>
@@ -29,20 +27,19 @@
 #include "H5Opkg.h"             /* Object headers			*/
 
 
-static void *H5O_mtime_new_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__mtime_new_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_mtime_new_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static size_t H5O_mtime_new_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
 
-static void *H5O_mtime_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__mtime_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_mtime_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_mtime_copy(const void *_mesg, void *_dest);
 static size_t H5O_mtime_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_mtime_reset(void *_mesg);
-static herr_t H5O_mtime_free(void *_mesg);
-static herr_t H5O_mtime_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
-           int indent, int fwidth);
+static herr_t H5O__mtime_free(void *_mesg);
+static herr_t H5O__mtime_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_MTIME[1] = {{
@@ -50,12 +47,12 @@ const H5O_msg_class_t H5O_MSG_MTIME[1] = {{
     "mtime",			/*message name for debugging	*/
     sizeof(time_t),		/*native message size		*/
     0,				/* messages are sharable?       */
-    H5O_mtime_decode,		/*decode message		*/
+    H5O__mtime_decode,		/*decode message		*/
     H5O_mtime_encode,		/*encode message		*/
     H5O_mtime_copy,		/*copy the native value		*/
     H5O_mtime_size,		/*raw message size		*/
-    H5O_mtime_reset,		/* reset method			*/
-    H5O_mtime_free,		/* free method			*/
+    NULL,			/* reset method			*/
+    H5O__mtime_free,		/* free method			*/
     NULL,		        /* file delete method		*/
     NULL,			/* link method			*/
     NULL,			/*set share method		*/
@@ -65,7 +62,7 @@ const H5O_msg_class_t H5O_MSG_MTIME[1] = {{
     NULL,			/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_mtime_debug		/*debug the message		*/
+    H5O__mtime_debug		/*debug the message		*/
 }};
 
 /* This message derives from H5O message class */
@@ -75,12 +72,12 @@ const H5O_msg_class_t H5O_MSG_MTIME_NEW[1] = {{
     "mtime_new",		/*message name for debugging	*/
     sizeof(time_t),		/*native message size		*/
     0,				/* messages are sharable?       */
-    H5O_mtime_new_decode,	/*decode message		*/
+    H5O__mtime_new_decode,	/*decode message		*/
     H5O_mtime_new_encode,	/*encode message		*/
     H5O_mtime_copy,		/*copy the native value		*/
     H5O_mtime_new_size,		/*raw message size		*/
-    H5O_mtime_reset,		/* reset method			*/
-    H5O_mtime_free,		/* free method			*/
+    NULL,			/* reset method			*/
+    H5O__mtime_free,		/* free method			*/
     NULL,		        /* file delete method		*/
     NULL,			/* link method			*/
     NULL,			/*set share method		*/
@@ -90,7 +87,7 @@ const H5O_msg_class_t H5O_MSG_MTIME_NEW[1] = {{
     NULL,			/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_mtime_debug		/*debug the message		*/
+    H5O__mtime_debug		/*debug the message		*/
 }};
 
 /* Current version of new mtime information */
@@ -101,7 +98,7 @@ H5FL_DEFINE(time_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_mtime_new_decode
+ * Function:	H5O__mtime_new_decode
  *
  * Purpose:     Decode a new modification time message and return a pointer to
  *              a new time_t value.
@@ -120,14 +117,15 @@ H5FL_DEFINE(time_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_mtime_new_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__mtime_new_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     time_t	*mesg;
     uint32_t    tmp_time;               /* Temporary copy of the time */
     void        *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -153,11 +151,11 @@ H5O_mtime_new_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_mtime_new_decode() */
+} /* end H5O__mtime_new_decode() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_mtime_decode
+ * Function:	H5O__mtime_decode
  *
  * Purpose:     Decode a modification time message and return a pointer to a
  *              new time_t value.
@@ -176,15 +174,16 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_mtime_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__mtime_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     time_t	*mesg, the_time;
     struct tm	tm;
     int	i;                              /* Local index variable */
     void        *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -217,7 +216,7 @@ H5O_mtime_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_mtime_decode() */
+} /* end H5O__mtime_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -408,58 +407,32 @@ H5O_mtime_size(const H5F_t H5_ATTR_UNUSED * f, hbool_t H5_ATTR_UNUSED disable_sh
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_mtime_reset
+ * Function:	H5O__mtime_free
  *
- * Purpose:	Frees resources within a modification time message, but doesn't free
- *		the message itself.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		Mondey, December 23, 2002
- *
- * Modifications:
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5O_mtime_reset(void H5_ATTR_UNUSED *_mesg)
-{
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-}
-
-
-/*-------------------------------------------------------------------------
- * Function:	H5O_mtime_free
- *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
  * Programmer:	Quincey Koziol
  *              Thursday, March 30, 2000
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_mtime_free(void *mesg)
+H5O__mtime_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(time_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_mtime_free() */
+} /* end H5O__mtime_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_mtime_debug
+ * Function:	H5O__mtime_debug
  *
  * Purpose:	Prints debugging info for the message.
  *
@@ -474,7 +447,7 @@ H5O_mtime_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_mtime_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE *stream,
+H5O__mtime_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
     int indent, int fwidth)
 {
     const time_t	*mesg = (const time_t *)_mesg;
@@ -498,5 +471,5 @@ H5O_mtime_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const voi
       "Time:", buf);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-}
+} /* end H5O__mtime_debug() */
 
diff --git a/src/H5Oname.c b/src/H5Oname.c
index 6c4f76f..a710944 100644
--- a/src/H5Oname.c
+++ b/src/H5Oname.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -34,14 +32,14 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_name_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__name_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_name_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_name_copy(const void *_mesg, void *_dest);
 static size_t H5O_name_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_name_reset(void *_mesg);
-static herr_t H5O_name_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE * stream,
-			     int indent, int fwidth);
+static herr_t H5O__name_reset(void *_mesg);
+static herr_t H5O__name_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_NAME[1] = {{
@@ -49,11 +47,11 @@ const H5O_msg_class_t H5O_MSG_NAME[1] = {{
     "name",                 	/*message name for debugging    */
     sizeof(H5O_name_t),     	/*native message size           */
     0,				/* messages are sharable?       */
-    H5O_name_decode,        	/*decode message                */
+    H5O__name_decode,        	/*decode message                */
     H5O_name_encode,        	/*encode message                */
     H5O_name_copy,          	/*copy the native value         */
     H5O_name_size,          	/*raw message size              */
-    H5O_name_reset,         	/*free internal memory          */
+    H5O__name_reset,         	/*free internal memory          */
     NULL,			/* free method			*/
     NULL,		        /* file delete method		*/
     NULL,			/* link method			*/
@@ -64,12 +62,12 @@ const H5O_msg_class_t H5O_MSG_NAME[1] = {{
     NULL,			/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_name_debug         	/*debug the message             */
+    H5O__name_debug         	/*debug the message             */
 }};
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_name_decode
+ * Function:    H5O__name_decode
  *
  * Purpose:     Decode a name message and return a pointer to a new
  *              native message struct.
@@ -85,13 +83,14 @@ const H5O_msg_class_t H5O_MSG_NAME[1] = {{
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_name_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__name_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_name_t          *mesg;
     void                *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -107,13 +106,12 @@ H5O_name_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_
     ret_value = mesg;
 
 done:
-    if(NULL == ret_value) {
+    if(NULL == ret_value)
         if(mesg)
             mesg = (H5O_name_t *)H5MM_xfree(mesg);
-    } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_name_decode() */
+} /* end H5O__name_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -239,7 +237,7 @@ H5O_name_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_shar
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_name_reset
+ * Function:    H5O__name_reset
  *
  * Purpose:     Frees internal pointers and resets the message to an
  *              initial state.
@@ -250,16 +248,14 @@ H5O_name_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_shar
  *              matzke@llnl.gov
  *              Aug 12 1997
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_name_reset(void *_mesg)
+H5O__name_reset(void *_mesg)
 {
     H5O_name_t             *mesg = (H5O_name_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(mesg);
@@ -268,11 +264,11 @@ H5O_name_reset(void *_mesg)
     mesg->s = (char *)H5MM_xfree(mesg->s);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_name_reset() */
+} /* end H5O__name_reset() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_name_debug
+ * Function:    H5O__name_debug
  *
  * Purpose:     Prints debugging info for the message.
  *
@@ -287,8 +283,8 @@ H5O_name_reset(void *_mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_name_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE *stream,
-	       int indent, int fwidth)
+H5O__name_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_name_t	*mesg = (const H5O_name_t *)_mesg;
 
@@ -306,4 +302,5 @@ H5O_name_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
             mesg->s);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-}
+} /* end H5O__name_debug() */
+
diff --git a/src/H5Onull.c b/src/H5Onull.c
index 258f695..5697455 100644
--- a/src/H5Onull.c
+++ b/src/H5Onull.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Opkg.h b/src/H5Opkg.h
index e1fa0be..f535e50 100644
--- a/src/H5Opkg.h
+++ b/src/H5Opkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #if !(defined H5O_FRIEND || defined H5O_MODULE)
@@ -65,8 +63,8 @@
     )
 #define H5O_ALIGN_OH(O, X)						      \
      H5O_ALIGN_VERS((O)->version, X)
-#define H5O_ALIGN_F(F, X)						      \
-     H5O_ALIGN_VERS((H5F_USE_LATEST_FLAGS(F, H5F_LATEST_OBJ_HEADER) ? H5O_VERSION_LATEST : H5O_VERSION_1), X)
+#define H5O_ALIGN_F(F, X)                             \
+     H5O_ALIGN_VERS(MAX(H5O_VERSION_1, (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(F)]), X)
 
 /* Size of checksum (on disk) */
 #define H5O_SIZEOF_CHKSUM               4
@@ -138,7 +136,7 @@
 #define H5O_SIZEOF_MSGHDR_OH(O)						      \
     H5O_SIZEOF_MSGHDR_VERS((O)->version, (O)->flags & H5O_HDR_ATTR_CRT_ORDER_TRACKED)
 #define H5O_SIZEOF_MSGHDR_F(F, C)						      \
-    H5O_SIZEOF_MSGHDR_VERS((H5F_USE_LATEST_FLAGS(F, H5F_LATEST_OBJ_HEADER) || H5F_STORE_MSG_CRT_IDX(F)) ? H5O_VERSION_LATEST : H5O_VERSION_1, (C))
+    H5O_SIZEOF_MSGHDR_VERS(MAX((H5F_STORE_MSG_CRT_IDX(F) ? H5O_VERSION_LATEST : H5O_VERSION_1), (uint8_t)H5O_obj_ver_bounds[H5F_LOW_BOUND(F)]), (C))
 
 /*
  * Size of chunk "header" for each chunk
@@ -181,14 +179,14 @@
 
 /* Load native information for a message, if it's not already present */
 /* (Only works for messages with decode callback) */
-#define H5O_LOAD_NATIVE(F, DXPL, IOF, OH, MSG, ERR)                           \
+#define H5O_LOAD_NATIVE(F, IOF, OH, MSG, ERR)                                 \
     if(NULL == (MSG)->native) {                                               \
         const H5O_msg_class_t	*msg_type = (MSG)->type;                      \
         unsigned                ioflags = (IOF);                              \
                                                                               \
         /* Decode the message */                                              \
         HDassert(msg_type->decode);                                           \
-        if(NULL == ((MSG)->native = (msg_type->decode)((F), (DXPL), (OH), (MSG)->flags, &ioflags, (MSG)->raw))) \
+        if(NULL == ((MSG)->native = (msg_type->decode)((F), (OH), (MSG)->flags, &ioflags, (MSG)->raw_size, (MSG)->raw))) \
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, ERR, "unable to decode message") \
                                                                               \
         /* Mark the message dirty if it was changed by decoding */            \
@@ -230,39 +228,39 @@ struct H5O_msg_class_t {
     const char	*name;				/*for debugging             */
     size_t	native_size;			/*size of native message    */
     unsigned    share_flags;			/* Message sharing settings */
-    void	*(*decode)(H5F_t *, hid_t, H5O_t *, unsigned, unsigned *, const uint8_t *);
+    void	*(*decode)(H5F_t *, H5O_t *, unsigned, unsigned *, size_t, const uint8_t *);
     herr_t	(*encode)(H5F_t *, hbool_t, uint8_t *, const void *);
     void	*(*copy)(const void *, void *);	/*copy native value         */
     size_t	(*raw_size)(const H5F_t *, hbool_t, const void *);/*sizeof encoded message	*/
     herr_t	(*reset)(void *);		/*free nested data structs  */
     herr_t	(*free)(void *);		/*free main data struct  */
-    herr_t	(*del)(H5F_t *, hid_t, H5O_t *, void *);    /* Delete space in file referenced by this message */
-    herr_t	(*link)(H5F_t *, hid_t, H5O_t *, void *);   /* Increment any links in file reference by this message */
+    herr_t	(*del)(H5F_t *, H5O_t *, void *);    /* Delete space in file referenced by this message */
+    herr_t	(*link)(H5F_t *, H5O_t *, void *);   /* Increment any links in file reference by this message */
     herr_t	(*set_share)(void*, const H5O_shared_t*);   /* Set shared information */
     htri_t	(*can_share)(const void *);	/* Is message allowed to be shared? */
     herr_t	(*pre_copy_file)(H5F_t *, const void *, hbool_t *, const H5O_copy_t *, void *); /*"pre copy" action when copying native value to file */
-    void	*(*copy_file)(H5F_t *, void *, H5F_t *, hbool_t *, unsigned *, H5O_copy_t *, void *, hid_t); /*copy native value to file */
-    herr_t	(*post_copy_file)(const H5O_loc_t *, const void *, H5O_loc_t *, void *, unsigned *, hid_t, H5O_copy_t *); /*"post copy" action when copying native value to file */
+    void	*(*copy_file)(H5F_t *, void *, H5F_t *, hbool_t *, unsigned *, H5O_copy_t *, void *); /*copy native value to file */
+    herr_t	(*post_copy_file)(const H5O_loc_t *, const void *, H5O_loc_t *, void *, unsigned *, H5O_copy_t *); /*"post copy" action when copying native value to file */
     herr_t      (*get_crt_index)(const void *, H5O_msg_crt_idx_t *);	/* Get message's creation index */
     herr_t      (*set_crt_index)(void *, H5O_msg_crt_idx_t);	/* Set message's creation index */
-    herr_t	(*debug)(H5F_t*, hid_t, const void*, FILE*, int, int);
+    herr_t	(*debug)(H5F_t*, const void*, FILE*, int, int);
 };
 
 struct H5O_mesg_t {
-    const H5O_msg_class_t	*type;	/*type of message		     */
-    hbool_t		dirty;		/*raw out of date wrt native	     */
-    uint8_t		flags;		/*message flags			     */
-    H5O_msg_crt_idx_t   crt_idx;        /*message creation index	     */
-    unsigned		chunkno;	/*chunk number for this mesg	     */
-    void		*native;	/*native format message		     */
-    uint8_t		*raw;		/*ptr to raw data		     */
-    size_t		raw_size;	/*size with alignment		     */
+    const H5O_msg_class_t   *type;      /* type of message                  */
+    hbool_t                 dirty;      /* raw out of date wrt native       */
+    uint8_t                 flags;      /* message flags                    */
+    H5O_msg_crt_idx_t       crt_idx;    /* message creation index           */
+    unsigned                chunkno;    /* chunk number for this mesg       */
+    void                    *native;    /* native format message            */
+    uint8_t                 *raw;       /* pointer to raw data              */
+    size_t                  raw_size;   /* size with alignment              */
 };
 
 /* Struct for storing information about "best" message to move to new chunk */
 typedef struct H5O_msg_alloc_info_t {
     int msgno;                      /* Index in message array */
-    unsigned id;		    /* Message type ID on disk */
+    unsigned id;                    /* Message type ID on disk */
     unsigned chunkno;               /* Index in chunk array */
     size_t gap_size;                /* Size of any "gap" in the chunk immediately after message */
     size_t null_size;               /* Size of any null message in the chunk immediately after message */
@@ -340,12 +338,12 @@ typedef struct H5O_obj_class_t {
     const char	*name;				/*for debugging		     */
     void       *(*get_copy_file_udata)(void);	/*retrieve user data for 'copy file' operation */
     void	(*free_copy_file_udata)(void *); /*free user data for 'copy file' operation */
-    htri_t	(*isa)(H5O_t *);		/*if a header matches an object class */
-    hid_t	(*open)(const H5G_loc_t *, hid_t, hid_t, hbool_t );	/*open an object of this class */
-    void	*(*create)(H5F_t *, void *, H5G_loc_t *, hid_t );	/*create an object of this class */
+    htri_t	(*isa)(const H5O_t *);		/*if a header matches an object class */
+    hid_t	(*open)(const H5G_loc_t *, hbool_t );	/*open an object of this class */
+    void	*(*create)(H5F_t *, void *, H5G_loc_t *);	/*create an object of this class */
     H5O_loc_t	*(*get_oloc)(hid_t );		/*get the object header location for an object */
-    herr_t      (*bh_info)(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh, H5_ih_info_t *bh_info); /*get the index & heap info for an object */
-    herr_t      (*flush)(void *obj_ptr, hid_t dxpl_id); /*flush an opened object of this class */
+    herr_t      (*bh_info)(const H5O_loc_t *loc, H5O_t *oh, H5_ih_info_t *bh_info); /*get the index & heap info for an object */
+    herr_t      (*flush)(void *obj_ptr);        /*flush an opened object of this class */
 } H5O_obj_class_t;
 
 /* Node in skip list to map addresses from one file to another during object header copy */
@@ -368,7 +366,6 @@ typedef struct H5O_cont_msgs_t {
 /* Common callback information for loading object header prefix from disk */
 typedef struct H5O_common_cache_ud_t {
     H5F_t *f;                           /* Pointer to file for object header/chunk */
-    hid_t dxpl_id;                      /* DXPL for operation */
     unsigned file_intent;               /* Read/write intent for file */
     unsigned merged_null_msgs;          /* Number of null messages merged together */
     H5O_cont_msgs_t *cont_msg_info;     /* Pointer to continuation messages to work on */
@@ -381,6 +378,7 @@ typedef struct H5O_cache_ud_t {
     unsigned v1_pfx_nmesgs;             /* Number of messages from v1 prefix header */
     size_t chunk0_size;                 /* Size of serialized first chunk    */
     H5O_t *oh;                          /* Partially deserialized object header, for later use */
+    hbool_t free_oh;                    /* Whether to free the object header or not */
     H5O_common_cache_ud_t common;       /* Common object header cache callback info */
 } H5O_cache_ud_t;
 
@@ -392,21 +390,19 @@ typedef struct H5O_chunk_proxy_t {
     H5F_t *f;                           /* Pointer to file for object header/chunk */
     H5O_t       *oh;                    /* Object header for this chunk */
     unsigned    chunkno;                /* Chunk number for this chunk */
-    unsigned    cont_chunkno;           /* Chunk number for the chunk containing the continuation message that points to this chunk */
 
     /* Flush depencency parent information (not stored) 
      *
      * The following field is used to store a pointer 
-     * to the in-core representation of the chunk proxy's flush dependency
+     * to the in-core representation of a new chunk proxy's flush dependency
      * parent -- if it exists.  If it does not exist, this field will
      * contain NULL.
      *
      * If the file is opened in SWMR write mode, the flush dependency 
      * parent of the chunk proxy will be either its object header 
-     * (if cont_chunkno == 0) or the chunk proxy indicated by the 
-     * cont_chunkno field (if cont_chunkno > 0).
+     * or the chunk with the continuation message that references this chunk.
      */
-    void *parent;                       /* Pointer to flush dependency parent */
+    void *fd_parent;                    /* Pointer to flush dependency parent */
 } H5O_chunk_proxy_t;
 
 /* Callback information for loading object header chunk from disk */
@@ -558,91 +554,108 @@ H5_DLLVAR const H5O_obj_class_t H5O_OBJ_DATASET[1];
 /* Datatype Object. (H5O_TYPE_NAMED_DATATYPE - 2) */
 H5_DLLVAR const H5O_obj_class_t H5O_OBJ_DATATYPE[1];
 
-
 /* Package-local function prototypes */
-H5_DLL herr_t H5O_msg_flush(H5F_t *f, H5O_t *oh, H5O_mesg_t *mesg);
-H5_DLL herr_t H5O_flush_msgs(H5F_t *f, H5O_t *oh);
-H5_DLL hid_t H5O_open_by_loc(const H5G_loc_t *obj_loc, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref);
-H5_DLL herr_t H5O_delete_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, H5O_mesg_t *mesg);
-H5_DLL const H5O_obj_class_t * H5O_obj_class(const H5O_loc_t *loc, hid_t dxpl_id);
-H5_DLL int H5O_link_oh(H5F_t *f, int adjust, hid_t dxpl_id, H5O_t *oh, hbool_t *deleted);
-H5_DLL herr_t H5O_inc_rc(H5O_t *oh);
-H5_DLL herr_t H5O_dec_rc(H5O_t *oh);
+H5_DLL hid_t H5O__open_name(const H5G_loc_t *loc, const char *name);
+H5_DLL hid_t H5O__open_by_idx(const H5G_loc_t *loc, const char *name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n);
+H5_DLL hid_t H5O__open_by_addr(const H5G_loc_t *loc, haddr_t addr);
+H5_DLL hid_t H5O__open_by_loc(const H5G_loc_t *obj_loc, hbool_t app_ref);
+H5_DLL herr_t H5O__create_link(const H5G_loc_t *new_loc, const char *new_name,
+    H5G_loc_t *obj_loc, hid_t lcpl_id);
+H5_DLL const H5O_obj_class_t *H5O__obj_class(const H5O_loc_t *loc);
+H5_DLL int H5O__link_oh(H5F_t *f, int adjust, H5O_t *oh, hbool_t *deleted);
+H5_DLL herr_t H5O__link(const H5O_loc_t *loc, int adjust);
+H5_DLL htri_t H5O__exists_by_name(const H5G_loc_t *loc, const char *name);
+H5_DLL herr_t H5O__get_info_by_name(const H5G_loc_t *loc, const char *name,
+    H5O_info_t *oinfo);
+H5_DLL herr_t H5O__get_info_by_idx(const H5G_loc_t *loc, const char *group_name,
+    H5_index_t idx_type, H5_iter_order_t order, hsize_t n, H5O_info_t *oinfo);
+H5_DLL herr_t H5O__set_comment_by_name(const H5G_loc_t *loc, const char *name,
+    const char *comment);
+H5_DLL ssize_t H5O__get_comment_by_name(const H5G_loc_t *loc, const char *name,
+    char *comment, size_t bufsize);
+H5_DLL herr_t H5O__visit(hid_t loc_id, const char *obj_name, H5_index_t idx_type,
+    H5_iter_order_t order, H5O_iterate_t op, void *op_data);
+H5_DLL herr_t H5O__inc_rc(H5O_t *oh);
+H5_DLL herr_t H5O__dec_rc(H5O_t *oh);
 H5_DLL herr_t H5O__free(H5O_t *oh);
 
 /* Object header message routines */
-H5_DLL herr_t H5O_msg_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    const H5O_msg_class_t *type, unsigned *mesg_flags, void *mesg,
-    size_t *mesg_idx);
-H5_DLL herr_t H5O_msg_append_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    const H5O_msg_class_t *type, unsigned mesg_flags, unsigned update_flags,
-    void *mesg);
-H5_DLL herr_t H5O_msg_write_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    const H5O_msg_class_t *type, unsigned mesg_flags, unsigned update_flags,
-    void *mesg);
-H5_DLL void *H5O_msg_free_real(const H5O_msg_class_t *type, void *mesg);
-H5_DLL herr_t H5O_msg_free_mesg(H5O_mesg_t *mesg);
+H5_DLL herr_t H5O__msg_alloc(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    unsigned *mesg_flags, void *mesg, size_t *mesg_idx);
+H5_DLL herr_t H5O__msg_append_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    unsigned mesg_flags, unsigned update_flags, void *mesg);
+H5_DLL herr_t H5O__msg_write_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    unsigned mesg_flags, unsigned update_flags, void *mesg);
+H5_DLL void *H5O__msg_free_real(const H5O_msg_class_t *type, void *mesg);
+H5_DLL herr_t H5O__msg_free_mesg(H5O_mesg_t *mesg);
 H5_DLL unsigned H5O_msg_count_real(const H5O_t *oh, const H5O_msg_class_t *type);
-H5_DLL herr_t H5O_msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
-    int sequence, H5O_operator_t op, void *op_data, hbool_t adj_link, hid_t dxpl_id);
-H5_DLL void *H5O_msg_copy_file(const H5O_msg_class_t *type, H5F_t *file_src,
+H5_DLL herr_t H5O__msg_remove_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    int sequence, H5O_operator_t op, void *op_data, hbool_t adj_link);
+H5_DLL void *H5O__msg_copy_file(const H5O_msg_class_t *type, H5F_t *file_src,
     void *mesg_src, H5F_t *file_dst, hbool_t *recompute_size,
-    unsigned *mesg_flags, H5O_copy_t *cpy_info, void *udata, hid_t dxpl_id);
-H5_DLL herr_t H5O_msg_iterate_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
-    const H5O_mesg_operator_t *op, void *op_data, hid_t dxpl_id);
+    unsigned *mesg_flags, H5O_copy_t *cpy_info, void *udata);
+H5_DLL herr_t H5O__msg_iterate_real(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    const H5O_mesg_operator_t *op, void *op_data);
+H5_DLL herr_t H5O_msg_flush(H5F_t *f, H5O_t *oh, H5O_mesg_t *mesg);
+H5_DLL herr_t H5O_flush_msgs(H5F_t *f, H5O_t *oh);
+H5_DLL herr_t H5O__delete_mesg(H5F_t *f, H5O_t *open_oh, H5O_mesg_t *mesg);
 
 /* Object header chunk routines */
-H5_DLL herr_t H5O_chunk_add(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx,
-    unsigned cont_chunkno);
-H5_DLL H5O_chunk_proxy_t *H5O_chunk_protect(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    unsigned idx);
-H5_DLL herr_t H5O_chunk_unprotect(H5F_t *f, hid_t dxpl_id,
-    H5O_chunk_proxy_t *chk_proxy, hbool_t chk_dirtied);
-H5_DLL herr_t H5O_chunk_update_idx(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx);
+H5_DLL herr_t H5O__chunk_add(H5F_t *f, H5O_t *oh, unsigned idx, unsigned cont_chunkno);
+H5_DLL H5O_chunk_proxy_t *H5O__chunk_protect(H5F_t *f, H5O_t *oh, unsigned idx);
+H5_DLL herr_t H5O__chunk_unprotect(H5F_t *f, H5O_chunk_proxy_t *chk_proxy,
+    hbool_t chk_dirtied);
+H5_DLL herr_t H5O__chunk_update_idx(H5F_t *f, H5O_t *oh, unsigned idx);
 H5_DLL herr_t H5O_chunk_resize(H5O_t *oh, H5O_chunk_proxy_t *chk_proxy);
-H5_DLL herr_t H5O_chunk_delete(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned idx);
+H5_DLL herr_t H5O__chunk_delete(H5F_t *f, H5O_t *oh, unsigned idx);
 H5_DLL herr_t H5O__chunk_dest(H5O_chunk_proxy_t *chunk_proxy);
 
 /* Collect storage info for btree and heap */
-H5_DLL herr_t H5O_attr_bh_info(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    H5_ih_info_t *bh_info);
+H5_DLL herr_t H5O__attr_bh_info(H5F_t *f, H5O_t *oh, H5_ih_info_t *bh_info);
 
 /* Object header allocation routines */
 H5_DLL herr_t H5O_alloc_msgs(H5O_t *oh, size_t min_alloc);
-H5_DLL herr_t H5O__alloc_chunk(H5F_t *f, hid_t dxpl_id, H5O_t *oh, size_t size,
+H5_DLL herr_t H5O__alloc_chunk(H5F_t *f, H5O_t *oh, size_t size,
     size_t found_null, const H5O_msg_alloc_info_t *found_msg, size_t *new_idx);
-H5_DLL herr_t  H5O_alloc(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    const H5O_msg_class_t *type, const void *mesg, size_t *mesg_idx);
-H5_DLL herr_t H5O_condense_header(H5F_t *f, H5O_t *oh, hid_t dxpl_id);
-H5_DLL herr_t H5O_release_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    H5O_mesg_t *mesg, hbool_t adj_link);
+H5_DLL herr_t  H5O__alloc(H5F_t *f, H5O_t *oh, const H5O_msg_class_t *type,
+    const void *mesg, size_t *mesg_idx);
+H5_DLL herr_t H5O_condense_header(H5F_t *f, H5O_t *oh);
+H5_DLL herr_t H5O_release_mesg(H5F_t *f, H5O_t *oh, H5O_mesg_t *mesg,
+    hbool_t adj_link);
 
 /* Shared object operators */
-H5_DLL void * H5O_shared_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned *ioflags, const uint8_t *buf, const H5O_msg_class_t *type);
+H5_DLL void * H5O_shared_decode(H5F_t *f, H5O_t *open_oh, unsigned *ioflags,
+    const uint8_t *buf, const H5O_msg_class_t *type);
 H5_DLL herr_t H5O_shared_encode(const H5F_t *f, uint8_t *buf/*out*/, const H5O_shared_t *sh_mesg);
 H5_DLL size_t H5O_shared_size(const H5F_t *f, const H5O_shared_t *sh_mesg);
-H5_DLL herr_t H5O_shared_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
+H5_DLL herr_t H5O__shared_delete(H5F_t *f, H5O_t *open_oh,
     const H5O_msg_class_t *mesg_type, H5O_shared_t *sh_mesg);
-H5_DLL herr_t H5O_shared_link(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
+H5_DLL herr_t H5O__shared_link(H5F_t *f, H5O_t *open_oh,
     const H5O_msg_class_t *mesg_type, H5O_shared_t *sh_mesg);
-H5_DLL herr_t H5O_shared_copy_file(H5F_t *file_src, H5F_t *file_dst,
+H5_DLL herr_t H5O__shared_copy_file(H5F_t *file_src, H5F_t *file_dst,
     const H5O_msg_class_t *mesg_type, const void *_native_src, void *_native_dst,
     hbool_t *recompute_size, unsigned *mesg_flags, H5O_copy_t *cpy_info,
-    void *udata, hid_t dxpl_id);
-H5_DLL herr_t H5O_shared_post_copy_file (H5F_t *f,
+    void *udata);
+H5_DLL herr_t H5O__shared_post_copy_file (H5F_t *f,
     const H5O_msg_class_t *mesg_type, const H5O_shared_t *shared_src,
-    H5O_shared_t *shared_dst, unsigned *mesg_flags, hid_t dxpl_id,
-    H5O_copy_t *cpy_info);
+    H5O_shared_t *shared_dst, unsigned *mesg_flags, H5O_copy_t *cpy_info);
 H5_DLL herr_t H5O_shared_debug(const H5O_shared_t *mesg, FILE *stream,
     int indent, int fwidth);
 
 /* Attribute message operators */
-H5_DLL herr_t H5O_attr_reset(void *_mesg);
-H5_DLL herr_t H5O_attr_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg);
-H5_DLL herr_t H5O_attr_link(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg);
-H5_DLL herr_t H5O_attr_count_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    hsize_t *nattrs);
+H5_DLL herr_t H5O__attr_reset(void *_mesg);
+H5_DLL herr_t H5O__attr_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
+H5_DLL herr_t H5O__attr_link(H5F_t *f, H5O_t *open_oh, void *_mesg);
+H5_DLL herr_t H5O_attr_count_real(H5F_t *f, H5O_t *oh, hsize_t *nattrs);
+
+/* Arrays of versions for:
+   Object header, Attribute/Fill value/Filter pipeline messages */
+/* Layout/Datatype/Dataspace arrays of versions are in H5Dpkg.h, H5Tpkg.h and H5Spkg.h */
+H5_DLLVAR const unsigned H5O_obj_ver_bounds[H5F_LIBVER_NBOUNDS];
+H5_DLLVAR const unsigned H5O_attr_ver_bounds[H5F_LIBVER_NBOUNDS];
+H5_DLLVAR const unsigned H5O_fill_ver_bounds[H5F_LIBVER_NBOUNDS];
+H5_DLLVAR const unsigned H5O_pline_ver_bounds[H5F_LIBVER_NBOUNDS];
 
 /* Testing functions */
 #ifdef H5O_TESTING
@@ -651,8 +664,8 @@ H5_DLL htri_t H5O_is_attr_dense_test(hid_t oid);
 H5_DLL herr_t H5O_num_attrs_test(hid_t oid, hsize_t *nattrs);
 H5_DLL herr_t H5O_attr_dense_info_test(hid_t oid, hsize_t *name_count, hsize_t *corder_count);
 H5_DLL herr_t H5O_check_msg_marked_test(hid_t oid, hbool_t flag_val);
-H5_DLL herr_t H5O_expunge_chunks_test(const H5O_loc_t *oloc, hid_t dxpl_id);
-H5_DLL herr_t H5O_get_rc(const H5O_loc_t *oloc, hid_t dxpl_id, unsigned *rc);
+H5_DLL herr_t H5O_expunge_chunks_test(const H5O_loc_t *oloc);
+H5_DLL herr_t H5O_get_rc(const H5O_loc_t *oloc, unsigned *rc);
 H5_DLL herr_t H5O_msg_get_chunkno_test(hid_t oid, unsigned msg_type,
     unsigned *chunk_num);
 H5_DLL herr_t H5O_msg_move_to_new_chunk_test(hid_t oid, unsigned msg_type);
@@ -662,7 +675,8 @@ H5_DLL herr_t H5O_msg_move_to_new_chunk_test(hid_t oid, unsigned msg_type);
 #ifdef H5O_DEBUG
 H5_DLL herr_t H5O_assert(const H5O_t *oh);
 #endif /* H5O_DEBUG */
-H5_DLL herr_t H5O_debug_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, haddr_t addr, FILE *stream, int indent, int fwidth);
+H5_DLL herr_t H5O_debug_real(H5F_t *f, H5O_t *oh, haddr_t addr, FILE *stream,
+    int indent, int fwidth);
 
 #endif /* _H5Opkg_H */
 
diff --git a/src/H5Opline.c b/src/H5Opline.c
index 95a82b5..1fae1b8 100644
--- a/src/H5Opline.c
+++ b/src/H5Opline.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -35,36 +33,36 @@
 
 /* PRIVATE PROTOTYPES */
 static herr_t H5O_pline_encode(H5F_t *f, uint8_t *p, const void *mesg);
-static void *H5O_pline_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__pline_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static void *H5O_pline_copy(const void *_mesg, void *_dest);
 static size_t H5O_pline_size(const H5F_t *f, const void *_mesg);
-static herr_t H5O_pline_reset(void *_mesg);
-static herr_t H5O_pline_free(void *_mesg);
+static herr_t H5O__pline_reset(void *_mesg);
+static herr_t H5O__pline_free(void *_mesg);
 static herr_t H5O_pline_pre_copy_file(H5F_t *file_src,
     const void *mesg_src, hbool_t *deleted, const H5O_copy_t *cpy_info, void *_udata);
-static herr_t H5O_pline_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-    FILE * stream, int indent, int fwidth);
+static herr_t H5O__pline_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* Set up & include shared message "interface" info */
 #define H5O_SHARED_TYPE			H5O_MSG_PLINE
 #define H5O_SHARED_DECODE		H5O_pline_shared_decode
-#define H5O_SHARED_DECODE_REAL		H5O_pline_decode
+#define H5O_SHARED_DECODE_REAL		H5O__pline_decode
 #define H5O_SHARED_ENCODE		H5O_pline_shared_encode
 #define H5O_SHARED_ENCODE_REAL		H5O_pline_encode
 #define H5O_SHARED_SIZE			H5O_pline_shared_size
 #define H5O_SHARED_SIZE_REAL		H5O_pline_size
-#define H5O_SHARED_DELETE		H5O_pline_shared_delete
+#define H5O_SHARED_DELETE		H5O__pline_shared_delete
 #undef H5O_SHARED_DELETE_REAL
-#define H5O_SHARED_LINK			H5O_pline_shared_link
+#define H5O_SHARED_LINK			H5O__pline_shared_link
 #undef H5O_SHARED_LINK_REAL
-#define H5O_SHARED_COPY_FILE		H5O_pline_shared_copy_file
+#define H5O_SHARED_COPY_FILE		H5O__pline_shared_copy_file
 #undef H5O_SHARED_COPY_FILE_REAL
 #define H5O_SHARED_POST_COPY_FILE	H5O_pline_shared_post_copy_file
 #undef H5O_SHARED_POST_COPY_FILE_REAL
 #undef  H5O_SHARED_POST_COPY_FILE_UPD
 #define H5O_SHARED_DEBUG		H5O_pline_shared_debug
-#define H5O_SHARED_DEBUG_REAL		H5O_pline_debug
+#define H5O_SHARED_DEBUG_REAL		H5O__pline_debug
 #include "H5Oshared.h"			/* Shared Object Header Message Callbacks */
 
 /* This message derives from H5O message class */
@@ -77,27 +75,33 @@ const H5O_msg_class_t H5O_MSG_PLINE[1] = {{
     H5O_pline_shared_encode,	/* encode message		*/
     H5O_pline_copy,		/* copy the native value	*/
     H5O_pline_shared_size,	/* size of raw message		*/
-    H5O_pline_reset,		/* reset method			*/
-    H5O_pline_free,		/* free method			*/
-    H5O_pline_shared_delete,    /* file delete method		*/
-    H5O_pline_shared_link,	/* link method			*/
+    H5O__pline_reset,		/* reset method			*/
+    H5O__pline_free,		/* free method			*/
+    H5O__pline_shared_delete,   /* file delete method		*/
+    H5O__pline_shared_link,	/* link method			*/
     NULL,			/* set share method		*/
     NULL,		    	/*can share method		*/
     H5O_pline_pre_copy_file,	/* pre copy native value to file */
-    H5O_pline_shared_copy_file,	/* copy native value to file    */
+    H5O__pline_shared_copy_file,	/* copy native value to file    */
     H5O_pline_shared_post_copy_file,	/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
     H5O_pline_shared_debug	/* debug the message		*/
 }};
 
+/* Format version bounds for filter pipleline */
+const unsigned H5O_pline_ver_bounds[] = {
+    H5O_PLINE_VERSION_1,        /* H5F_LIBVER_EARLIEST */
+    H5O_PLINE_VERSION_2,        /* H5F_LIBVER_V18 */
+    H5O_PLINE_VERSION_LATEST    /* H5F_LIBVER_LATEST */
+};
 
 /* Declare a free list to manage the H5O_pline_t struct */
 H5FL_DEFINE(H5O_pline_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_pline_decode
+ * Function:	H5O__pline_decode
  *
  * Purpose:	Decodes a filter pipeline message.
  *
@@ -110,33 +114,42 @@ H5FL_DEFINE(H5O_pline_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_pline_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__pline_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t p_size, const uint8_t *p)
 {
     H5O_pline_t		*pline = NULL;          /* Pipeline message */
     H5Z_filter_info_t   *filter;                /* Filter to decode */
     size_t		name_length;            /* Length of filter name */
     size_t		i;                      /* Local index variable */
+    const uint8_t *p_end = p + p_size - 1;  /* End of the p buffer */
     void		*ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(p);
 
     /* Allocate space for I/O pipeline message */
     if(NULL == (pline = H5FL_CALLOC(H5O_pline_t)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Version */
     pline->version = *p++;
     if(pline->version < H5O_PLINE_VERSION_1 || pline->version > H5O_PLINE_VERSION_LATEST)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTLOAD, NULL, "bad version number for filter pipeline message")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTLOAD, NULL, "bad version number for filter pipeline message")
 
     /* Number of filters */
     pline->nused = *p++;
-    if(pline->nused > H5Z_MAX_NFILTERS)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTLOAD, NULL, "filter pipeline message has too many filters")
+    if(pline->nused > H5Z_MAX_NFILTERS) {
+
+        /* Reset the number of filters used to avoid array traversal in error
+         * handling code.
+         */
+        pline->nused = 0;
+
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTLOAD, NULL, "filter pipeline message has too many filters")
+    }
 
     /* Reserved */
     if(pline->version == H5O_PLINE_VERSION_1)
@@ -145,12 +158,12 @@ H5O_pline_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5
     /* Allocate array for filters */
     pline->nalloc = pline->nused;
     if(NULL == (pline->filter = (H5Z_filter_info_t *)H5MM_calloc(pline->nalloc * sizeof(pline->filter[0]))))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Decode filters */
     for(i = 0, filter = &pline->filter[0]; i < pline->nused; i++, filter++) {
         /* Filter ID */
-	UINT16DECODE(p, filter->id);
+        UINT16DECODE(p, filter->id);
 
         /* Length of filter name */
         if(pline->version > H5O_PLINE_VERSION_1 && filter->id < H5Z_FILTER_RESERVED)
@@ -162,18 +175,18 @@ H5O_pline_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5
         } /* end if */
 
         /* Filter flags */
-	UINT16DECODE(p, filter->flags);
+        UINT16DECODE(p, filter->flags);
 
         /* Number of filter parameters ("client data elements") */
-	UINT16DECODE(p, filter->cd_nelmts);
+        UINT16DECODE(p, filter->cd_nelmts);
 
         /* Filter name, if there is one */
-	if(name_length) {
+        if(name_length) {
             size_t actual_name_length;          /* Actual length of name */
 
             /* Determine actual name length (without padding, but with null terminator) */
-	    actual_name_length = HDstrlen((const char *)p) + 1;
-	    HDassert(actual_name_length <= name_length);
+            actual_name_length = HDstrlen((const char *)p) + 1;
+            HDassert(actual_name_length <= name_length);
 
             /* Allocate space for the filter name, or use the internal buffer */
             if(actual_name_length > H5Z_COMMON_NAME_LEN) {
@@ -184,12 +197,12 @@ H5O_pline_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5
             else
                 filter->name = filter->_name;
 
-	    HDstrncpy(filter->name, (const char *)p, actual_name_length);
-	    p += name_length;
-	} /* end if */
+            HDstrncpy(filter->name, (const char *)p, actual_name_length);
+            p += name_length;
+        } /* end if */
 
         /* Filter parameters */
-	if(filter->cd_nelmts) {
+        if(filter->cd_nelmts) {
             size_t	j;              /* Local index variable */
 
             /* Allocate space for the client data elements, or use the internal buffer */
@@ -201,15 +214,20 @@ H5O_pline_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5
             else
                 filter->cd_values = filter->_cd_values;
 
-	    /*
-	     * Read the client data values and the padding
-	     */
-	    for(j = 0; j < filter->cd_nelmts; j++)
-		UINT32DECODE(p, filter->cd_values[j]);
+            /*
+             * Read the client data values and the padding
+             */
+            for (j = 0; j < filter->cd_nelmts; j++) {
+                if (p + 4 - 1 <= p_end)
+                    UINT32DECODE(p, filter->cd_values[j])
+                else
+                    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "ran off the end of the buffer: current p = %p, p_size = %zu, p_end = %p", p, p_size, p_end)
+            }
+
             if(pline->version == H5O_PLINE_VERSION_1)
                 if(filter->cd_nelmts % 2)
                     p += 4; /*padding*/
-	} /* end if */
+        } /* end if */
     } /* end for */
 
     /* Set return value */
@@ -217,12 +235,12 @@ H5O_pline_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5
 
 done:
     if(NULL == ret_value && pline) {
-        H5O_pline_reset(pline);
-        H5O_pline_free(pline);
+        H5O__pline_reset(pline);
+        H5O__pline_free(pline);
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_pline_decode() */
+} /* end H5O__pline_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -407,9 +425,9 @@ H5O_pline_copy(const void *_src, void *_dst/*out*/)
 
 done:
     if(!ret_value && dst) {
-        H5O_pline_reset(dst);
+        H5O__pline_reset(dst);
 	if(!_dst)
-            H5O_pline_free(dst);
+            H5O__pline_free(dst);
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -478,7 +496,7 @@ H5O_pline_size(const H5F_t H5_ATTR_UNUSED *f, const void *mesg)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_pline_reset
+ * Function:	H5O__pline_reset
  *
  * Purpose:	Resets a filter pipeline message by clearing all filters.
  *		The MESG buffer is not freed.
@@ -491,30 +509,37 @@ H5O_pline_size(const H5F_t H5_ATTR_UNUSED *f, const void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_pline_reset(void *mesg)
+H5O__pline_reset(void *mesg)
 {
     H5O_pline_t	*pline = (H5O_pline_t*)mesg;    /* Pipeline message */
     size_t	i;                              /* Local index variable */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
+
+    /* NOTE: This function can be called during error processing from
+     *       other API calls so DO NOT ASSUME THAT ANY VALUES ARE SANE.
+     */
 
     HDassert(pline);
 
-    /* Free information for each filter */
-    for(i = 0; i < pline->nused; i++) {
-        if(pline->filter[i].name && pline->filter[i].name != pline->filter[i]._name)
-            HDassert((HDstrlen(pline->filter[i].name) + 1) > H5Z_COMMON_NAME_LEN);
-        if(pline->filter[i].name != pline->filter[i]._name)
-            pline->filter[i].name = (char *)H5MM_xfree(pline->filter[i].name);
-        if(pline->filter[i].cd_values && pline->filter[i].cd_values != pline->filter[i]._cd_values)
-            HDassert(pline->filter[i].cd_nelmts > H5Z_COMMON_CD_VALUES);
-        if(pline->filter[i].cd_values != pline->filter[i]._cd_values)
-            pline->filter[i].cd_values = (unsigned *)H5MM_xfree(pline->filter[i].cd_values);
-    } /* end for */
+    /* Free the filter information and array */
+    if (pline->filter) {
+
+        /* Free information for each filter */
+        for(i = 0; i < pline->nused; i++) {
+            if(pline->filter[i].name && pline->filter[i].name != pline->filter[i]._name)
+                HDassert((HDstrlen(pline->filter[i].name) + 1) > H5Z_COMMON_NAME_LEN);
+            if(pline->filter[i].name != pline->filter[i]._name)
+                pline->filter[i].name = (char *)H5MM_xfree(pline->filter[i].name);
+            if(pline->filter[i].cd_values && pline->filter[i].cd_values != pline->filter[i]._cd_values)
+                HDassert(pline->filter[i].cd_nelmts > H5Z_COMMON_CD_VALUES);
+            if(pline->filter[i].cd_values != pline->filter[i]._cd_values)
+                pline->filter[i].cd_values = (unsigned *)H5MM_xfree(pline->filter[i].cd_values);
+        } /* end for */
 
-    /* Free filter array */
-    if(pline->filter)
+        /* Free filter array */
         pline->filter = (H5Z_filter_info_t *)H5MM_xfree(pline->filter);
+    }
 
     /* Reset # of filters */
     pline->nused = pline->nalloc = 0;
@@ -523,13 +548,13 @@ H5O_pline_reset(void *mesg)
     pline->version = H5O_PLINE_VERSION_1;
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_pline_reset() */
+} /* end H5O__pline_reset() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_pline_free
+ * Function:	H5O__pline_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -539,16 +564,16 @@ H5O_pline_reset(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_pline_free(void *mesg)
+H5O__pline_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_pline_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_pline_free() */
+} /* end H5O__pline_free() */
 
 
 /*-------------------------------------------------------------------------
@@ -568,16 +593,23 @@ H5O_pline_free(void *mesg)
  */
 static herr_t
 H5O_pline_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void *mesg_src,
-    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t H5_ATTR_UNUSED *cpy_info, void *_udata)
+    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t *cpy_info, void *_udata)
 {
-    const H5O_pline_t *pline_src = (const H5O_pline_t *)mesg_src;    /* Source datatype */
+    const H5O_pline_t *pline_src = (const H5O_pline_t *)mesg_src;    /* Source pline */
     H5O_copy_file_ud_common_t *udata = (H5O_copy_file_ud_common_t *)_udata; /* Object copying user data */
-    herr_t             ret_value = SUCCEED;                     /* Return value */
+    herr_t ret_value = SUCCEED;                                     /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
     /* check args */
     HDassert(pline_src);
+    HDassert(cpy_info);
+    HDassert(cpy_info->file_dst);
+
+    /* Check to ensure that the version of the message to be copied does not exceed
+       the message version allowed by the destination file's high bound */
+    if(pline_src->version > H5O_pline_ver_bounds[H5F_HIGH_BOUND(cpy_info->file_dst)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "pline message version out of bounds")
 
     /* If the user data is non-NULL, assume we are copying a dataset or group
      * and make a copy of the filter pipeline for later in
@@ -593,7 +625,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_pline_debug
+ * Function:	H5O__pline_debug
  *
  * Purpose:	Prints debugging information for filter pipeline message MESG
  *		on output stream STREAM.  Each line is indented INDENT
@@ -607,13 +639,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_pline_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *mesg, FILE *stream,
-		int indent, int fwidth)
+H5O__pline_debug(H5F_t H5_ATTR_UNUSED *f, const void *mesg, FILE *stream,
+    int indent, int fwidth)
 {
     const H5O_pline_t	*pline = (const H5O_pline_t *)mesg;
     size_t		i, j;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -662,32 +694,42 @@ H5O_pline_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const voi
     } /* end for */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_pline_debug() */
+} /* end H5O__pline_debug() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_pline_set_latest_version
+ * Function:    H5O_pline_set_version
  *
- * Purpose:     Set the encoding for a I/O filter pipeline to the latest version.
+ * Purpose:     Set the version to encode an I/O filter pipeline with.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:  Quincey Koziol
- *              Tuesday, July 24, 2007
+ * Programmer:  Vailin Choi; December 2017
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_pline_set_latest_version(H5O_pline_t *pline)
+H5O_pline_set_version(H5F_t *f, H5O_pline_t *pline)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    unsigned version;           /* Message version */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity check */
+    HDassert(f);
     HDassert(pline);
 
-    /* Set encoding of I/O pipeline to latest version */
-    pline->version = H5O_PLINE_VERSION_LATEST;
+    /* Upgrade to the version indicated by the file's low bound if higher */
+    version = MAX(pline->version, H5O_pline_ver_bounds[H5F_LOW_BOUND(f)]);
 
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_pline_set_latest_version() */
+    /* Version bounds check */
+    if(version > H5O_pline_ver_bounds[H5F_HIGH_BOUND(f)])
+        HGOTO_ERROR(H5E_PLINE, H5E_BADRANGE, FAIL, "Filter pipeline version out of bounds")
 
+    /* Set the message version */
+    pline->version = version;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5O_pline_set_version() */
diff --git a/src/H5Oprivate.h b/src/H5Oprivate.h
index f0fbe72..696fd38 100644
--- a/src/H5Oprivate.h
+++ b/src/H5Oprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -26,6 +24,10 @@
 #ifndef _H5Oprivate_H
 #define _H5Oprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5O_t H5O_t;
+typedef struct H5O_fill_t H5O_fill_t;
+
 /* Include the public header file for this API */
 #include "H5Opublic.h"          /* Object header functions              */
 
@@ -46,7 +48,6 @@
 /* Forward references of package typedefs */
 typedef struct H5O_msg_class_t H5O_msg_class_t;
 typedef struct H5O_mesg_t H5O_mesg_t;
-typedef struct H5O_t H5O_t;
 
 /* Values used to create the shared message & attribute heaps */
 /* (Note that these parameters have been tuned so that the resulting heap ID
@@ -176,8 +177,15 @@ typedef struct H5O_copy_t {
     H5SL_t  *dst_dt_list;               /* Skip list to hold committed datatypes in dest file */
     hbool_t dst_dt_list_complete;       /* Whether the destination datatype list is complete (i.e. not only populated with "suggestions" from H5Padd_merge_committed_dtype_path) */
     H5O_t   *oh_dst;                    /* The destination object header */
+    H5F_t   *file_dst;                  /* The destination file pointer */
+                                        /* This is used in the pre_copy_file callback to obtain
+                                           the destination file's high bound.  The high bound
+                                           is used to index into the corresponding message's
+                                           array of versions for doing version bounds check. */
+    void    *shared_fo;                 /* The shared pointer for the src object */
     H5O_mcdt_search_cb_t mcdt_cb;	/* The callback to invoke before searching the global list of committed datatypes at destination */
     void *mcdt_ud;			/* User data passed to callback */
+    hid_t lcpl_id;			/* LCPL for callbacks' use */
 } H5O_copy_t;
 
 /* Header message IDs */
@@ -307,7 +315,7 @@ typedef struct H5O_linfo_t {
  * message if it's shared.
  */
 
-typedef struct H5O_fill_t {
+struct H5O_fill_t {
     H5O_shared_t        sh_loc;         /* Shared message info (must be first) */
 
     unsigned	        version;	/* Encoding version number           */
@@ -317,7 +325,7 @@ typedef struct H5O_fill_t {
     H5D_alloc_time_t	alloc_time;	/* time to allocate space	     */
     H5D_fill_time_t	fill_time;	/* time to write fill value	     */
     hbool_t		fill_defined;   /* whether fill value is defined     */
-} H5O_fill_t;
+};
 
 /*
  * Link message.
@@ -385,6 +393,9 @@ typedef struct H5O_efl_t {
     | H5O_LAYOUT_CHUNK_SINGLE_INDEX_WITH_FILTER                             \
     )
 
+/* Version # of encoded virtual dataset global heap blocks */
+#define H5O_LAYOUT_VDS_GH_ENC_VERS      0
+
 /* Initial version of the layout information.  Used when space is allocated */
 #define H5O_LAYOUT_VERSION_1	1
 
@@ -584,6 +595,7 @@ typedef struct H5O_layout_chunk_earray_t {
     unsigned    unlim_dim;              /* Rank of unlimited dimension for dataset */
     uint32_t    swizzled_dim[H5O_LAYOUT_NDIMS]; /* swizzled chunk dimensions */
     hsize_t    	swizzled_down_chunks[H5O_LAYOUT_NDIMS];	/* swizzled "down" size of number of chunks in each dimension */
+    hsize_t     swizzled_max_down_chunks[H5O_LAYOUT_NDIMS]; /* swizzled max "down" size of number of chunks in each dimension */
 } H5O_layout_chunk_earray_t;
 
 typedef struct H5O_layout_chunk_bt2_t {
@@ -851,62 +863,58 @@ struct H5P_genplist_t;
 
 /* Object header routines */
 H5_DLL herr_t H5O_init(void);
-H5_DLL herr_t H5O_create(H5F_t *f, hid_t dxpl_id, size_t size_hint,
-    size_t initial_rc, hid_t ocpl_id, H5O_loc_t *loc/*out*/);
+H5_DLL herr_t H5O_create(H5F_t *f, size_t size_hint, size_t initial_rc,
+    hid_t ocpl_id, H5O_loc_t *loc/*out*/);
 H5_DLL herr_t H5O_open(H5O_loc_t *loc);
 H5_DLL herr_t H5O_close(H5O_loc_t *loc, hbool_t *file_closed/*out*/);
-H5_DLL int H5O_link(const H5O_loc_t *loc, int adjust, hid_t dxpl_id);
-H5_DLL H5O_t *H5O_protect(const H5O_loc_t *loc, hid_t dxpl_id,
-    unsigned prot_flags, hbool_t pin_all_chunks);
-H5_DLL H5O_t *H5O_pin(const H5O_loc_t *loc, hid_t dxpl_id);
+H5_DLL int H5O_link(const H5O_loc_t *loc, int adjust);
+H5_DLL H5O_t *H5O_protect(const H5O_loc_t *loc, unsigned prot_flags,
+    hbool_t pin_all_chunks);
+H5_DLL H5O_t *H5O_pin(const H5O_loc_t *loc);
 H5_DLL herr_t H5O_unpin(H5O_t *oh);
-H5_DLL herr_t H5O_dec_rc_by_loc(const H5O_loc_t *loc, hid_t dxpl_id);
-H5_DLL herr_t H5O_unprotect(const H5O_loc_t *loc, hid_t dxpl_id, H5O_t *oh,
-    unsigned oh_flags);
-H5_DLL herr_t H5O_touch(const H5O_loc_t *loc, hbool_t force, hid_t dxpl_id);
-H5_DLL herr_t H5O_touch_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    hbool_t force);
+H5_DLL herr_t H5O_dec_rc_by_loc(const H5O_loc_t *loc);
+H5_DLL herr_t H5O_unprotect(const H5O_loc_t *loc, H5O_t *oh, unsigned oh_flags);
+H5_DLL herr_t H5O_touch(const H5O_loc_t *loc, hbool_t force);
+H5_DLL herr_t H5O_touch_oh(H5F_t *f, H5O_t *oh, hbool_t force);
 #ifdef H5O_ENABLE_BOGUS
-H5_DLL herr_t H5O_bogus_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned mesg_id, unsigned mesg_flags);
+H5_DLL herr_t H5O_bogus_oh(H5F_t *f, H5O_t *oh, unsigned mesg_id, unsigned mesg_flags);
 #endif /* H5O_ENABLE_BOGUS */
-H5_DLL herr_t H5O_delete(H5F_t *f, hid_t dxpl_id, haddr_t addr);
-H5_DLL herr_t H5O_get_hdr_info(const H5O_loc_t *oloc, hid_t dxpl_id, H5O_hdr_info_t *hdr);
-H5_DLL herr_t H5O_get_info(const H5O_loc_t *oloc, hid_t dxpl_id, hbool_t want_ih_info,
+H5_DLL herr_t H5O_delete(H5F_t *f, haddr_t addr);
+H5_DLL herr_t H5O_get_hdr_info(const H5O_loc_t *oloc, H5O_hdr_info_t *hdr);
+H5_DLL herr_t H5O_get_info(const H5O_loc_t *oloc, hbool_t want_ih_info,
     H5O_info_t *oinfo);
-H5_DLL herr_t H5O_obj_type(const H5O_loc_t *loc, H5O_type_t *obj_type, hid_t dxpl_id);
-H5_DLL herr_t H5O_get_create_plist(const H5O_loc_t *loc, hid_t dxpl_id, struct H5P_genplist_t *oc_plist);
-H5_DLL hid_t H5O_open_name(H5G_loc_t *loc, const char *name, hid_t lapl_id, hid_t dxpl_id, hbool_t app_ref);
-H5_DLL herr_t H5O_get_nlinks(const H5O_loc_t *loc, hid_t dxpl_id, hsize_t *nlinks);
-H5_DLL void *H5O_obj_create(H5F_t *f, H5O_type_t obj_type, void *crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id);
+H5_DLL herr_t H5O_obj_type(const H5O_loc_t *loc, H5O_type_t *obj_type);
+H5_DLL herr_t H5O_get_create_plist(const H5O_loc_t *loc, struct H5P_genplist_t *oc_plist);
+H5_DLL hid_t H5O_open_name(const H5G_loc_t *loc, const char *name, hbool_t app_ref);
+H5_DLL herr_t H5O_get_nlinks(const H5O_loc_t *loc, hsize_t *nlinks);
+H5_DLL void *H5O_obj_create(H5F_t *f, H5O_type_t obj_type, void *crt_info, H5G_loc_t *obj_loc);
 H5_DLL haddr_t H5O_get_oh_addr(const H5O_t *oh);
-H5_DLL herr_t H5O_get_rc_and_type(const H5O_loc_t *oloc, hid_t dxpl_id, unsigned *rc, H5O_type_t *otype);
+H5_DLL herr_t H5O_get_rc_and_type(const H5O_loc_t *oloc, unsigned *rc, H5O_type_t *otype);
 H5_DLL H5AC_proxy_entry_t *H5O_get_proxy(const H5O_t *oh);
 
 /* Object header message routines */
 H5_DLL herr_t H5O_msg_create(const H5O_loc_t *loc, unsigned type_id, unsigned mesg_flags,
-    unsigned update_flags, void *mesg, hid_t dxpl_id);
-H5_DLL herr_t H5O_msg_append_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
+    unsigned update_flags, void *mesg);
+H5_DLL herr_t H5O_msg_append_oh(H5F_t *f, H5O_t *oh, unsigned type_id,
     unsigned mesg_flags, unsigned update_flags, void *mesg);
 H5_DLL herr_t H5O_msg_write(const H5O_loc_t *loc, unsigned type_id,
-    unsigned mesg_flags, unsigned update_flags, void *mesg, hid_t dxpl_id);
-H5_DLL herr_t H5O_msg_write_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh,
-    unsigned type_id, unsigned mesg_flags, unsigned update_flags, void *mesg);
-H5_DLL void *H5O_msg_read(const H5O_loc_t *loc, unsigned type_id, void *mesg,
-    hid_t dxpl_id);
-H5_DLL void *H5O_msg_read_oh(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned type_id,
-    void *mesg);
+    unsigned mesg_flags, unsigned update_flags, void *mesg);
+H5_DLL herr_t H5O_msg_write_oh(H5F_t *f, H5O_t *oh, unsigned type_id,
+    unsigned mesg_flags, unsigned update_flags, void *mesg);
+H5_DLL void *H5O_msg_read(const H5O_loc_t *loc, unsigned type_id, void *mesg);
+H5_DLL void *H5O_msg_read_oh(H5F_t *f, H5O_t *oh, unsigned type_id, void *mesg);
 H5_DLL herr_t H5O_msg_reset(unsigned type_id, void *native);
 H5_DLL void *H5O_msg_free(unsigned type_id, void *mesg);
 H5_DLL void *H5O_msg_copy(unsigned type_id, const void *mesg, void *dst);
-H5_DLL int H5O_msg_count(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id);
-H5_DLL htri_t H5O_msg_exists(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id);
+H5_DLL int H5O_msg_count(const H5O_loc_t *loc, unsigned type_id);
+H5_DLL htri_t H5O_msg_exists(const H5O_loc_t *loc, unsigned type_id);
 H5_DLL htri_t H5O_msg_exists_oh(const H5O_t *oh, unsigned type_id);
 H5_DLL herr_t H5O_msg_remove(const H5O_loc_t *loc, unsigned type_id, int sequence,
-    hbool_t adj_link, hid_t dxpl_id);
+    hbool_t adj_link);
 H5_DLL herr_t H5O_msg_remove_op(const H5O_loc_t *loc, unsigned type_id, int sequence,
-    H5O_operator_t op, void *op_data, hbool_t adj_link, hid_t dxpl_id);
+    H5O_operator_t op, void *op_data, hbool_t adj_link);
 H5_DLL herr_t H5O_msg_iterate(const H5O_loc_t *loc, unsigned type_id,
-    const H5O_mesg_operator_t *op, void *op_data, hid_t dxpl_id);
+    const H5O_mesg_operator_t *op, void *op_data);
 H5_DLL size_t H5O_msg_raw_size(const H5F_t *f, unsigned type_id,
     hbool_t disable_shared, const void *mesg);
 H5_DLL size_t H5O_msg_size_f(const H5F_t *f, hid_t ocpl_id, unsigned type_id,
@@ -923,29 +931,28 @@ H5_DLL herr_t H5O_msg_get_crt_index(unsigned type_id, const void *mesg,
     H5O_msg_crt_idx_t *crt_idx);
 H5_DLL herr_t H5O_msg_encode(H5F_t *f, unsigned type_id, hbool_t disable_shared,
     unsigned char *buf, const void *obj);
-H5_DLL void* H5O_msg_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned type_id, const unsigned char *buf);
-H5_DLL herr_t H5O_msg_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned type_id, void *mesg);
-H5_DLL herr_t H5O_msg_get_flags(const H5O_loc_t *loc, unsigned type_id, hid_t dxpl_id, uint8_t *flags);
+H5_DLL void* H5O_msg_decode(H5F_t *f, H5O_t *open_oh, unsigned type_id,
+    size_t buf_size, const unsigned char *buf);
+H5_DLL herr_t H5O_msg_delete(H5F_t *f, H5O_t *open_oh, unsigned type_id,
+    void *mesg);
+H5_DLL herr_t H5O_msg_get_flags(const H5O_loc_t *loc, unsigned type_id, uint8_t *flags);
 
 /* Object metadata flush/refresh routines */
-H5_DLL herr_t H5O_flush_common(H5O_loc_t *oloc, hid_t obj_id, hid_t dxpl_id);
-H5_DLL herr_t H5O_refresh_metadata(hid_t oid, H5O_loc_t oloc, hid_t dxpl_id);
-H5_DLL herr_t H5O_refresh_metadata_close(hid_t oid, H5O_loc_t oloc, H5G_loc_t *obj_loc, hid_t dxpl_id);
-H5_DLL herr_t H5O_refresh_metadata_reopen(hid_t oid, H5G_loc_t *obj_loc, hid_t dxpl_id, hbool_t start_swmr);
+H5_DLL herr_t H5O_flush_common(H5O_loc_t *oloc, hid_t obj_id);
+H5_DLL herr_t H5O_refresh_metadata(hid_t oid, H5O_loc_t oloc);
+H5_DLL herr_t H5O_refresh_metadata_reopen(hid_t oid, H5G_loc_t *obj_loc, hbool_t start_swmr);
 
 /* Object copying routines */
 H5_DLL herr_t H5O_copy_header_map(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out */,
-    hid_t dxpl_id, H5O_copy_t *cpy_info, hbool_t inc_depth,
+    H5O_copy_t *cpy_info, hbool_t inc_depth,
     H5O_type_t *obj_type, void **udata);
-H5_DLL herr_t H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, hid_t dxpl_id,
+H5_DLL herr_t H5O_copy_expand_ref(H5F_t *file_src, void *_src_ref, 
     H5F_t *file_dst, void *_dst_ref, size_t ref_count, H5R_type_t ref_type,
     H5O_copy_t *cpy_info);
 
 /* Debugging routines */
-H5_DLL herr_t H5O_debug_id(unsigned type_id, H5F_t *f, hid_t dxpl_id, const void *mesg, FILE *stream, int indent, int fwidth);
-H5_DLL herr_t H5O_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE * stream, int indent,
+H5_DLL herr_t H5O_debug_id(unsigned type_id, H5F_t *f, const void *mesg, FILE *stream, int indent, int fwidth);
+H5_DLL herr_t H5O_debug(H5F_t *f, haddr_t addr, FILE * stream, int indent,
 			 int fwidth);
 
 /* These functions operate on object locations */
@@ -960,15 +967,14 @@ H5_DLL hsize_t H5O_efl_total_size(H5O_efl_t *efl);
 
 /* Fill value operators */
 H5_DLL herr_t H5O_fill_reset_dyn(H5O_fill_t *fill);
-H5_DLL herr_t H5O_fill_convert(H5O_fill_t *fill, H5T_t *type, hbool_t *fill_changed, hid_t dxpl_id);
-H5_DLL herr_t H5O_fill_set_latest_version(H5O_fill_t *fill);
+H5_DLL herr_t H5O_fill_convert(H5O_fill_t *fill, H5T_t *type, hbool_t *fill_changed);
+H5_DLL herr_t H5O_fill_set_version(H5F_t * f, H5O_fill_t *fill);
 
 /* Link operators */
-H5_DLL herr_t H5O_link_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    void *_mesg);
+H5_DLL herr_t H5O_link_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
 
 /* Filter pipeline operators */
-H5_DLL herr_t H5O_pline_set_latest_version(H5O_pline_t *pline);
+H5_DLL herr_t H5O_pline_set_version(H5F_t *f, H5O_pline_t *pline);
 
 /* Shared message operators */
 H5_DLL herr_t H5O_set_shared(H5O_shared_t *dst, const H5O_shared_t *src);
diff --git a/src/H5Opublic.h b/src/H5Opublic.h
index dec7b5b..8d6dda4 100644
--- a/src/H5Opublic.h
+++ b/src/H5Opublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Orefcount.c b/src/H5Orefcount.c
index ff7dfee..66b79bb 100644
--- a/src/H5Orefcount.c
+++ b/src/H5Orefcount.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -34,16 +32,16 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_refcount_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__refcount_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_refcount_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_refcount_copy(const void *_mesg, void *_dest);
 static size_t H5O_refcount_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_refcount_free(void *_mesg);
+static herr_t H5O__refcount_free(void *_mesg);
 static herr_t H5O_refcount_pre_copy_file(H5F_t *file_src, const void *mesg_src,
     hbool_t *deleted, const H5O_copy_t *cpy_info, void *udata);
-static herr_t H5O_refcount_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-			     FILE * stream, int indent, int fwidth);
+static herr_t H5O__refcount_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_REFCOUNT[1] = {{
@@ -51,12 +49,12 @@ const H5O_msg_class_t H5O_MSG_REFCOUNT[1] = {{
     "refcount",                	/*message name for debugging    */
     sizeof(H5O_refcount_t),    	/*native message size           */
     0,				/* messages are sharable?       */
-    H5O_refcount_decode,	/*decode message                */
+    H5O__refcount_decode,	/*decode message                */
     H5O_refcount_encode,	/*encode message                */
     H5O_refcount_copy,		/*copy the native value         */
     H5O_refcount_size,		/*size of symbol table entry    */
     NULL,                   	/*default reset method          */
-    H5O_refcount_free,	        /* free method			*/
+    H5O__refcount_free,	        /* free method			*/
     NULL,			/* file delete method		*/
     NULL,			/* link method			*/
     NULL, 			/*set share method		*/
@@ -66,7 +64,7 @@ const H5O_msg_class_t H5O_MSG_REFCOUNT[1] = {{
     NULL,			/* post copy native value to file */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_refcount_debug         	/*debug the message             */
+    H5O__refcount_debug        	/*debug the message             */
 }};
 
 /* Current version of ref. count information */
@@ -77,7 +75,7 @@ H5FL_DEFINE_STATIC(H5O_refcount_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_refcount_decode
+ * Function:    H5O__refcount_decode
  *
  * Purpose:     Decode a message and return a pointer to a newly allocated one.
  *
@@ -91,13 +89,14 @@ H5FL_DEFINE_STATIC(H5O_refcount_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_refcount_decode(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__refcount_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_refcount_t *refcount = NULL;    /* Reference count */
     void *ret_value = NULL;             /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -122,7 +121,7 @@ done:
         refcount = H5FL_FREE(H5O_refcount_t, refcount);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_refcount_decode() */
+} /* end H5O__refcount_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -233,9 +232,9 @@ H5O_refcount_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_refcount_free
+ * Function:	H5O__refcount_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -245,16 +244,16 @@ H5O_refcount_size(const H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_refcount_free(void *mesg)
+H5O__refcount_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_refcount_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_refcount_free() */
+} /* end H5O__refcount_free() */
 
 
 /*-------------------------------------------------------------------------
@@ -291,7 +290,7 @@ H5O_refcount_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UN
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_refcount_debug
+ * Function:    H5O__refcount_debug
  *
  * Purpose:     Prints debugging info for a message.
  *
@@ -304,12 +303,12 @@ H5O_refcount_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void H5_ATTR_UN
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_refcount_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__refcount_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE * stream,
+   int indent, int fwidth)
 {
     const H5O_refcount_t       *refcount = (const H5O_refcount_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -322,5 +321,5 @@ H5O_refcount_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const
 	      "Number of links:", (unsigned)*refcount);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_refcount_debug() */
+} /* end H5O__refcount_debug() */
 
diff --git a/src/H5Osdspace.c b/src/H5Osdspace.c
index 28021de..74fa72e 100644
--- a/src/H5Osdspace.c
+++ b/src/H5Osdspace.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Omodule.h"          /* This source code file is part of the H5O module */
@@ -27,37 +25,37 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_sdspace_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__sdspace_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_sdspace_encode(H5F_t *f, uint8_t *p, const void *_mesg);
 static void *H5O_sdspace_copy(const void *_mesg, void *_dest);
 static size_t H5O_sdspace_size(const H5F_t *f, const void *_mesg);
-static herr_t H5O_sdspace_reset(void *_mesg);
-static herr_t H5O_sdspace_free(void *_mesg);
+static herr_t H5O__sdspace_reset(void *_mesg);
+static herr_t H5O__sdspace_free(void *_mesg);
 static herr_t H5O_sdspace_pre_copy_file(H5F_t *file_src, const void *mesg_src,
     hbool_t *deleted, const H5O_copy_t *cpy_info, void *_udata);
-static herr_t H5O_sdspace_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
-				FILE * stream, int indent, int fwidth);
+static herr_t H5O__sdspace_debug(H5F_t *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth);
 
 /* Set up & include shared message "interface" info */
 #define H5O_SHARED_TYPE			H5O_MSG_SDSPACE
 #define H5O_SHARED_DECODE		H5O_sdspace_shared_decode
-#define H5O_SHARED_DECODE_REAL		H5O_sdspace_decode
+#define H5O_SHARED_DECODE_REAL		H5O__sdspace_decode
 #define H5O_SHARED_ENCODE		H5O_sdspace_shared_encode
 #define H5O_SHARED_ENCODE_REAL		H5O_sdspace_encode
 #define H5O_SHARED_SIZE			H5O_sdspace_shared_size
 #define H5O_SHARED_SIZE_REAL		H5O_sdspace_size
-#define H5O_SHARED_DELETE		H5O_sdspace_shared_delete
+#define H5O_SHARED_DELETE		H5O__sdspace_shared_delete
 #undef H5O_SHARED_DELETE_REAL
-#define H5O_SHARED_LINK			H5O_sdspace_shared_link
+#define H5O_SHARED_LINK			H5O__sdspace_shared_link
 #undef H5O_SHARED_LINK_REAL
-#define H5O_SHARED_COPY_FILE		H5O_sdspace_shared_copy_file
+#define H5O_SHARED_COPY_FILE		H5O__sdspace_shared_copy_file
 #undef H5O_SHARED_COPY_FILE_REAL
 #define H5O_SHARED_POST_COPY_FILE	H5O_sdspace_shared_post_copy_file
 #undef H5O_SHARED_POST_COPY_FILE_REAL
 #undef  H5O_SHARED_POST_COPY_FILE_UPD
 #define H5O_SHARED_DEBUG		H5O_sdspace_shared_debug
-#define H5O_SHARED_DEBUG_REAL		H5O_sdspace_debug
+#define H5O_SHARED_DEBUG_REAL		H5O__sdspace_debug
 #include "H5Oshared.h"			/* Shared Object Header Message Callbacks */
 
 /* This message derives from H5O message class */
@@ -70,14 +68,14 @@ const H5O_msg_class_t H5O_MSG_SDSPACE[1] = {{
     H5O_sdspace_shared_encode,	/* encode message			*/
     H5O_sdspace_copy,	    	/* copy the native value		*/
     H5O_sdspace_shared_size,	/* size of symbol table entry	    	*/
-    H5O_sdspace_reset,	    	/* default reset method		    	*/
-    H5O_sdspace_free,		/* free method				*/
-    H5O_sdspace_shared_delete,	/* file delete method		*/
-    H5O_sdspace_shared_link,	/* link method			*/
+    H5O__sdspace_reset,	    	/* default reset method		    	*/
+    H5O__sdspace_free,		/* free method				*/
+    H5O__sdspace_shared_delete,	/* file delete method		*/
+    H5O__sdspace_shared_link,	/* link method			*/
     NULL,			/* set share method		*/
     NULL,		    	/*can share method		*/
     H5O_sdspace_pre_copy_file,	/* pre copy native value to file */
-    H5O_sdspace_shared_copy_file,/* copy native value to file    */
+    H5O__sdspace_shared_copy_file,/* copy native value to file    */
     H5O_sdspace_shared_post_copy_file,/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
@@ -93,14 +91,13 @@ H5FL_ARR_EXTERN(hsize_t);
 
 /*--------------------------------------------------------------------------
  NAME
-    H5O_sdspace_decode
+    H5O__sdspace_decode
  PURPOSE
     Decode a simple dimensionality message and return a pointer to a memory
 	struct with the decoded information
  USAGE
-    void *H5O_sdspace_decode(f, dxpl_id, mesg_flags, p)
+    void *H5O__sdspace_decode(f, mesg_flags, p)
 	H5F_t *f;	        IN: pointer to the HDF5 file struct
-        hid_t dxpl_id;          IN: DXPL for any I/O
         unsigned mesg_flags;    IN: Message flags to influence decoding
 	const uint8 *p;		IN: the raw information buffer
  RETURNS
@@ -111,15 +108,16 @@ H5FL_ARR_EXTERN(hsize_t);
     within this function using malloc() and is returned to the caller.
 --------------------------------------------------------------------------*/
 static void *
-H5O_sdspace_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__sdspace_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5S_extent_t	*sdim = NULL;/* New extent dimensionality structure */
     unsigned		flags, version;
     unsigned		i;                      /* Local counting variable */
     void                *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -196,7 +194,7 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_sdspace_decode() */
+} /* end H5O__sdspace_decode() */
 
 
 /*--------------------------------------------------------------------------
@@ -374,7 +372,7 @@ H5O_sdspace_size(const H5F_t *f, const void *_mesg)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_sdspace_reset
+ * Function:	H5O__sdspace_reset
  *
  * Purpose:	Frees the inside of a dataspace message and resets it to some
  *		initial value.
@@ -384,27 +382,25 @@ H5O_sdspace_size(const H5F_t *f, const void *_mesg)
  * Programmer:	Robb Matzke
  *              Thursday, April 30, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_sdspace_reset(void *_mesg)
+H5O__sdspace_reset(void *_mesg)
 {
     H5S_extent_t	*mesg = (H5S_extent_t*)_mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     H5S_extent_release(mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-}
+} /* end H5O__sdspace_reset() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_sdsdpace_free
+ * Function:	H5O__sdsdpace_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -414,16 +410,16 @@ H5O_sdspace_reset(void *_mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_sdspace_free(void *mesg)
+H5O__sdspace_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5S_extent_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_sdspace_free() */
+} /* end H5O__sdspace_free() */
 
 
 /*-------------------------------------------------------------------------
@@ -443,7 +439,7 @@ H5O_sdspace_free(void *mesg)
  */
 static herr_t
 H5O_sdspace_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void *mesg_src,
-    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t H5_ATTR_UNUSED *cpy_info, void *_udata)
+    hbool_t H5_ATTR_UNUSED *deleted, const H5O_copy_t *cpy_info, void *_udata)
 {
     const H5S_extent_t *src_space_extent = (const H5S_extent_t *)mesg_src;  /* Source dataspace extent */
     H5D_copy_file_ud_t *udata = (H5D_copy_file_ud_t *)_udata;   /* Dataset copying user data */
@@ -454,6 +450,13 @@ H5O_sdspace_pre_copy_file(H5F_t H5_ATTR_UNUSED *file_src, const void *mesg_src,
     /* check args */
     HDassert(file_src);
     HDassert(src_space_extent);
+    HDassert(cpy_info);
+    HDassert(cpy_info->file_dst);
+
+    /* Check to ensure that the version of the message to be copied does not exceed
+       the message version allowed by the destination file's high bound */
+    if(src_space_extent->version > H5O_sdspace_ver_bounds[H5F_HIGH_BOUND(cpy_info->file_dst)])
+        HGOTO_ERROR(H5E_OHDR, H5E_BADRANGE, FAIL, "dataspace message version out of bounds")
 
     /* If the user data is non-NULL, assume we are copying a dataset
      * and make a copy of the dataspace extent for later in the object copying
@@ -478,11 +481,11 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5O_sdspace_debug
+    H5O__sdspace_debug
  PURPOSE
     Prints debugging information for a simple dimensionality message
  USAGE
-    void *H5O_sdspace_debug(f, mesg, stream, indent, fwidth)
+    void *H5O__sdspace_debug(f, mesg, stream, indent, fwidth)
 	H5F_t *f;	        IN: pointer to the HDF5 file struct
 	const void *mesg;	IN: Pointer to the source extent dimensionality struct
 	FILE *stream;		IN: Pointer to the stream for output data
@@ -495,12 +498,12 @@ done:
     parameter.
 --------------------------------------------------------------------------*/
 static herr_t
-H5O_sdspace_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *mesg,
-		  FILE * stream, int indent, int fwidth)
+H5O__sdspace_debug(H5F_t H5_ATTR_UNUSED *f, const void *mesg, FILE * stream,
+    int indent, int fwidth)
 {
     const H5S_extent_t	   *sdim = (const H5S_extent_t *)mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -537,5 +540,5 @@ H5O_sdspace_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const v
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_sdspace_debug() */
+} /* end H5O__sdspace_debug() */
 
diff --git a/src/H5Oshared.c b/src/H5Oshared.c
index 25baa88..047f90e 100644
--- a/src/H5Oshared.c
+++ b/src/H5Oshared.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -106,7 +104,7 @@
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_shared_read(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned *ioflags,
+H5O_shared_read(H5F_t *f, H5O_t *open_oh, unsigned *ioflags,
     const H5O_shared_t *shared, const H5O_msg_class_t *type)
 {
     H5HF_t *fheap = NULL;
@@ -134,15 +132,15 @@ H5O_shared_read(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned *ioflags,
         size_t mesg_size;               /* Size of message */
 
         /* Retrieve the fractal heap address for shared messages */
-        if(H5SM_get_fheap_addr(f, dxpl_id, type->id, &fheap_addr) < 0)
+        if(H5SM_get_fheap_addr(f, type->id, &fheap_addr) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "can't get fheap address for shared messages")
 
         /* Open the fractal heap */
-        if(NULL == (fheap = H5HF_open(f, dxpl_id, fheap_addr)))
+        if(NULL == (fheap = H5HF_open(f, fheap_addr)))
             HGOTO_ERROR(H5E_OHDR, H5E_CANTOPENOBJ, NULL, "unable to open fractal heap")
 
         /* Get the size of the message in the heap */
-        if(H5HF_get_obj_len(fheap, dxpl_id, &(shared->u.heap_id), &mesg_size) < 0)
+        if(H5HF_get_obj_len(fheap, &(shared->u.heap_id), &mesg_size) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTGET, NULL, "can't get message size from fractal heap.")
 
         /* Wrap the local buffer for serialized message */
@@ -154,11 +152,11 @@ H5O_shared_read(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned *ioflags,
             HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, NULL, "can't get actual buffer")
 
         /* Retrieve the message from the heap */
-        if(H5HF_read(fheap, dxpl_id, &(shared->u.heap_id), mesg_ptr) < 0)
+        if(H5HF_read(fheap, &(shared->u.heap_id), mesg_ptr) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "can't read message from fractal heap.")
 
         /* Decode the message */
-        if(NULL == (ret_value = (type->decode)(f, dxpl_id, open_oh, 0, ioflags, mesg_ptr)))
+        if(NULL == (ret_value = (type->decode)(f, open_oh, 0, ioflags, mesg_size, mesg_ptr)))
             HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, NULL, "can't decode shared message.")
     } /* end if */
     else {
@@ -176,11 +174,11 @@ H5O_shared_read(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned *ioflags,
              * is possible, for example, if an attribute's datatype is shared in
              * the same object header the attribute is in.  Read the message
              * directly. */
-            if(NULL == (ret_value = H5O_msg_read_oh(f, dxpl_id, open_oh, type->id, NULL)))
+            if(NULL == (ret_value = H5O_msg_read_oh(f, open_oh, type->id, NULL)))
                 HGOTO_ERROR(H5E_OHDR, H5E_READERROR, NULL, "unable to read message")
         } else
             /* The shared message is in another object header */
-            if(NULL == (ret_value = H5O_msg_read(&oloc, type->id, NULL, dxpl_id)))
+            if(NULL == (ret_value = H5O_msg_read(&oloc, type->id, NULL)))
                 HGOTO_ERROR(H5E_OHDR, H5E_READERROR, NULL, "unable to read message")
     } /* end else */
 
@@ -190,7 +188,7 @@ H5O_shared_read(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned *ioflags,
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_HEAP, H5E_CANTFREE, NULL, "can't close fractal heap")
     if(wb && H5WB_unwrap(wb) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CLOSEERROR, NULL, "can't close wrapped buffer")
@@ -200,7 +198,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_shared_link_adj
+ * Function:	H5O__shared_link_adj
  *
  * Purpose:	Changes the link count for the object referenced by a shared
  *              message.
@@ -221,12 +219,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_shared_link_adj(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    const H5O_msg_class_t *type, H5O_shared_t *shared, int adjust)
+H5O__shared_link_adj(H5F_t *f, H5O_t *open_oh, const H5O_msg_class_t *type,
+    H5O_shared_t *shared, int adjust)
 {
     herr_t ret_value = SUCCEED;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
@@ -264,15 +262,15 @@ H5O_shared_link_adj(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
              * is possible, for example, if an attribute's datatype is shared in
              * the same object header the attribute is in.  Adjust the link
              * count directly. */
-            hbool_t deleted = FALSE; /* This is used only to satisfy H5O_link_oh */
+            hbool_t deleted = FALSE; /* This is used only to satisfy H5O__link_oh */
 
-            if(H5O_link_oh(f, adjust, dxpl_id, open_oh, &deleted) < 0)
+            if(H5O__link_oh(f, adjust, open_oh, &deleted) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust shared object link count")
 
             HDassert(!deleted);
         } else
             /* The shared message is in another object header */
-            if(H5O_link(&oloc, adjust, dxpl_id) < 0)
+            if(H5O_link(&oloc, adjust) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust shared object link count")
     } /* end if */
     else {
@@ -280,19 +278,19 @@ H5O_shared_link_adj(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 
         /* Check for decrementing reference count on shared message */
         if(adjust < 0) {
-            if(H5SM_delete(f, dxpl_id, open_oh, shared) < 0)
+            if(H5SM_delete(f, open_oh, shared) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to delete message from SOHM table")
         } /* end if */
         /* Check for incrementing reference count on message */
         else if(adjust > 0) {
-            if(H5SM_try_share(f, dxpl_id, open_oh, 0, type->id, shared, NULL) < 0)
+            if(H5SM_try_share(f, open_oh, 0, type->id, shared, NULL) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, FAIL, "error trying to share message")
         } /* end if */
     } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_shared_link_adj() */
+} /* end H5O__shared_link_adj() */
 
 
 /*-------------------------------------------------------------------------
@@ -308,8 +306,8 @@ done:
  *-------------------------------------------------------------------------
  */
 void *
-H5O_shared_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned *ioflags,
-    const uint8_t *buf, const H5O_msg_class_t *type)
+H5O_shared_decode(H5F_t *f, H5O_t *open_oh, unsigned *ioflags, const uint8_t *buf,
+    const H5O_msg_class_t *type)
 {
     H5O_shared_t sh_mesg;       /* Shared message info */
     unsigned version;           /* Shared message version */
@@ -375,7 +373,7 @@ H5O_shared_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned *ioflags,
     sh_mesg.msg_type_id = type->id;
 
     /* Retrieve actual message, through decoded shared message info */
-    if(NULL == (ret_value = H5O_shared_read(f, dxpl_id, open_oh, ioflags, &sh_mesg, type)))
+    if(NULL == (ret_value = H5O_shared_read(f, open_oh, ioflags, &sh_mesg, type)))
         HGOTO_ERROR(H5E_OHDR, H5E_READERROR, NULL, "unable to retrieve native message")
 
 done:
@@ -498,7 +496,7 @@ H5O_shared_size(const H5F_t *f, const H5O_shared_t *sh_mesg)
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_shared_delete
+ * Function:    H5O__shared_delete
  *
  * Purpose:     Free file space referenced by message
  *
@@ -510,12 +508,12 @@ H5O_shared_size(const H5F_t *f, const H5O_shared_t *sh_mesg)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_shared_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    const H5O_msg_class_t *type, H5O_shared_t *sh_mesg)
+H5O__shared_delete(H5F_t *f, H5O_t *open_oh, const H5O_msg_class_t *type,
+    H5O_shared_t *sh_mesg)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -523,24 +521,24 @@ H5O_shared_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 
     /*
      * Committed datatypes increment the OH of the original message when they
-     * are written (in H5O_shared_link) and decrement it here.
+     * are written (in H5O__shared_link) and decrement it here.
      * SOHMs in the heap behave differently; their refcount is incremented
      * during H5SM_share when they are going to be written (in H5O_msg_append
      * or H5O_msg_write). Their refcount in the SOHM indexes still needs to
-     * be decremented when they're deleted (in H5O_shared_link_adj).
+     * be decremented when they're deleted (in H5O__shared_link_adj).
      */
 
     /* Decrement the reference count on the shared object */
-    if(H5O_shared_link_adj(f, dxpl_id, open_oh, type, sh_mesg, -1) < 0)
+    if(H5O__shared_link_adj(f, open_oh, type, sh_mesg, -1) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust shared object link count")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_shared_delete() */
+} /* end H5O__shared_delete() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_shared_link
+ * Function:    H5O__shared_link
  *
  * Purpose:     Increment reference count on any objects referenced by
  *              message
@@ -553,28 +551,28 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_shared_link(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    const H5O_msg_class_t *type, H5O_shared_t *sh_mesg)
+H5O__shared_link(H5F_t *f, H5O_t *open_oh, const H5O_msg_class_t *type,
+    H5O_shared_t *sh_mesg)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
     HDassert(sh_mesg);
 
     /* Increment the reference count on the shared object */
-    if(H5O_shared_link_adj(f, dxpl_id, open_oh, type, sh_mesg, 1) < 0)
+    if(H5O__shared_link_adj(f, open_oh, type, sh_mesg, 1) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_LINKCOUNT, FAIL, "unable to adjust shared object link count")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_shared_link() */
+} /* end H5O__shared_link() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_shared_copy_file
+ * Function:    H5O__shared_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
  *
@@ -587,16 +585,16 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_shared_copy_file(H5F_t *file_src, H5F_t *file_dst,
+H5O__shared_copy_file(H5F_t *file_src, H5F_t *file_dst,
     const H5O_msg_class_t *mesg_type, const void *_native_src, void *_native_dst,
     hbool_t H5_ATTR_UNUSED *recompute_size, unsigned *mesg_flags, H5O_copy_t *cpy_info,
-    void H5_ATTR_UNUSED *udata, hid_t dxpl_id)
+    void H5_ATTR_UNUSED *udata)
 {
     const H5O_shared_t  *shared_src = (const H5O_shared_t *)_native_src; /* Alias to shared info in native source */
     H5O_shared_t        *shared_dst = (H5O_shared_t *)_native_dst; /* Alias to shared info in native destination message */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(file_src);
@@ -619,13 +617,13 @@ H5O_shared_copy_file(H5F_t *file_src, H5F_t *file_dst,
     if(shared_src->type != H5O_SHARE_TYPE_COMMITTED) {
         /* Simulate trying to share new message in the destination file. */
         /* Set copied metadata tag */
-        H5_BEGIN_TAG(dxpl_id, H5AC__COPIED_TAG, FAIL);
+        H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
-        if(H5SM_try_share(file_dst, dxpl_id, NULL, H5SM_DEFER, mesg_type->id, _native_dst, mesg_flags) < 0)
+        if(H5SM_try_share(file_dst, NULL, H5SM_DEFER, mesg_type->id, _native_dst, mesg_flags) < 0)
             HGOTO_ERROR_TAG(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to determine if message should be shared")
 
         /* Reset metadata tag */
-        H5_END_TAG(FAIL);
+        H5_END_TAG
     } /* end if */
     else {
         /* Mark the message as committed - as it will be committed in post copy
@@ -636,11 +634,11 @@ H5O_shared_copy_file(H5F_t *file_src, H5F_t *file_dst,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_shared_copy_file() */
+} /* H5O__shared_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_shared_post_copy_file
+ * Function:    H5O__shared_post_copy_file
  *
  * Purpose:     Delate a shared message and replace with a new one.
  *              The function is needed at cases such as coping a shared reg_ref attribute.
@@ -658,13 +656,13 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5O_shared_post_copy_file(H5F_t *f, const H5O_msg_class_t *mesg_type,
+H5O__shared_post_copy_file(H5F_t *f, const H5O_msg_class_t *mesg_type,
     const H5O_shared_t *shared_src, H5O_shared_t *shared_dst,
-    unsigned *mesg_flags, hid_t dxpl_id, H5O_copy_t *cpy_info)
+    unsigned *mesg_flags, H5O_copy_t *cpy_info)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_PACKAGE
 
     /* check args */
     HDassert(f);
@@ -681,8 +679,7 @@ H5O_shared_post_copy_file(H5F_t *f, const H5O_msg_class_t *mesg_type,
         dst_oloc.file = f;
         src_oloc.file = shared_src->file;
         src_oloc.addr = shared_src->u.loc.oh_addr;
-        if(H5O_copy_header_map(&src_oloc, &dst_oloc, dxpl_id, cpy_info, FALSE,
-                NULL, NULL) < 0)
+        if(H5O_copy_header_map(&src_oloc, &dst_oloc, cpy_info, FALSE, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy object")
 
         /* Set up destination message's shared info */
@@ -690,13 +687,12 @@ H5O_shared_post_copy_file(H5F_t *f, const H5O_msg_class_t *mesg_type,
     } /* end if */
     else
         /* Share the message */
-        if(H5SM_try_share(f, dxpl_id, NULL, H5SM_WAS_DEFERRED, mesg_type->id,
-                shared_dst, mesg_flags) < 0)
+        if(H5SM_try_share(f, NULL, H5SM_WAS_DEFERRED, mesg_type->id, shared_dst, mesg_flags) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_BADMESG, FAIL, "can't share message")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_shared_post_copy_file() */
+} /* end H5O__shared_post_copy_file() */
 
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Oshared.h b/src/H5Oshared.h
index e8d620a..2960fef 100644
--- a/src/H5Oshared.h
+++ b/src/H5Oshared.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -48,8 +46,8 @@
  *-------------------------------------------------------------------------
  */
 static H5_INLINE void *
-H5O_SHARED_DECODE(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned mesg_flags,
-    unsigned *ioflags, const uint8_t *p)
+H5O_SHARED_DECODE(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p)
 {
     void *ret_value = NULL;     /* Return value */
 
@@ -68,8 +66,8 @@ H5O_SHARED_DECODE(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned mesg_flags,
     /* Check for shared message */
     if(mesg_flags & H5O_MSG_FLAG_SHARED) {
         /* Retrieve native message info indirectly through shared message */
-        if(NULL == (ret_value = H5O_shared_decode(f, dxpl_id, open_oh, ioflags, p, H5O_SHARED_TYPE)))
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, NULL, "unable to decode shared message")
+        if(NULL == (ret_value = H5O_shared_decode(f, open_oh, ioflags, p, H5O_SHARED_TYPE)))
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, NULL, "unable to decode shared message")
 
         /* We currently do not support automatically fixing shared messages */
 #ifdef H5_STRICT_FORMAT_CHECKS
@@ -81,8 +79,8 @@ H5O_SHARED_DECODE(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned mesg_flags,
     } /* end if */
     else {
         /* Decode native message directly */
-        if(NULL == (ret_value = H5O_SHARED_DECODE_REAL(f, dxpl_id, open_oh, mesg_flags, ioflags, p)))
-	    HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, NULL, "unable to decode native message")
+        if(NULL == (ret_value = H5O_SHARED_DECODE_REAL(f, open_oh, mesg_flags, ioflags, p_size, p)))
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTDECODE, NULL, "unable to decode native message")
     } /* end else */
 
 done:
@@ -216,12 +214,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5_INLINE herr_t
-H5O_SHARED_DELETE(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
+H5O_SHARED_DELETE(H5F_t *f, H5O_t *open_oh, void *_mesg)
 {
     H5O_shared_t *sh_mesg = (H5O_shared_t *)_mesg;     /* Pointer to shared message portion of actual message */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
 #ifndef H5O_SHARED_TYPE
 #error "Need to define H5O_SHARED_TYPE macro!"
@@ -233,13 +231,13 @@ H5O_SHARED_DELETE(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
     /* Check for message tracked elsewhere */
     if(H5O_IS_TRACKED_SHARED(sh_mesg->type)) {
         /* Decrement the reference count on the shared message/object */
-        if(H5O_shared_delete(f, dxpl_id, open_oh, H5O_SHARED_TYPE, sh_mesg) < 0)
+        if(H5O__shared_delete(f, open_oh, H5O_SHARED_TYPE, sh_mesg) < 0)
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement ref count for shared message")
     } /* end if */
 #ifdef H5O_SHARED_DELETE_REAL
     else {
         /* Decrement the reference count on the native message directly */
-        if(H5O_SHARED_DELETE_REAL(f, dxpl_id, open_oh, _mesg) < 0)
+        if(H5O_SHARED_DELETE_REAL(f, open_oh, _mesg) < 0)
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTDEC, FAIL, "unable to decrement ref count for native message")
     } /* end else */
 #endif /* H5O_SHARED_DELETE_REAL */
@@ -268,12 +266,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5_INLINE herr_t
-H5O_SHARED_LINK(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
+H5O_SHARED_LINK(H5F_t *f, H5O_t *open_oh, void *_mesg)
 {
     H5O_shared_t *sh_mesg = (H5O_shared_t *)_mesg;     /* Pointer to shared message portion of actual message */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
 #ifndef H5O_SHARED_TYPE
 #error "Need to define H5O_SHARED_TYPE macro!"
@@ -285,13 +283,13 @@ H5O_SHARED_LINK(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg)
     /* Check for message tracked elsewhere */
     if(H5O_IS_TRACKED_SHARED(sh_mesg->type)) {
         /* Increment the reference count on the shared message/object */
-        if(H5O_shared_link(f, dxpl_id, open_oh, H5O_SHARED_TYPE, sh_mesg) < 0)
+        if(H5O__shared_link(f, open_oh, H5O_SHARED_TYPE, sh_mesg) < 0)
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, FAIL, "unable to increment ref count for shared message")
     } /* end if */
 #ifdef H5O_SHARED_LINK_REAL
     else {
         /* Increment the reference count on the native message directly */
-        if(H5O_SHARED_LINK_REAL(f, dxpl_id, open_oh, _mesg) < 0)
+        if(H5O_SHARED_LINK_REAL(f, open_oh, _mesg) < 0)
 	    HGOTO_ERROR(H5E_OHDR, H5E_CANTINC, FAIL, "unable to increment ref count for native message")
     } /* end else */
 #endif /* H5O_SHARED_LINK_REAL */
@@ -321,12 +319,12 @@ done:
 static H5_INLINE void *
 H5O_SHARED_COPY_FILE(H5F_t *file_src, void *_native_src, H5F_t *file_dst,
     hbool_t *recompute_size, unsigned *mesg_flags, H5O_copy_t *cpy_info,
-    void *udata, hid_t dxpl_id)
+    void *udata)
 {
     void *dst_mesg = NULL;      /* Destination message */
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
 #ifndef H5O_SHARED_TYPE
 #error "Need to define H5O_SHARED_TYPE macro!"
@@ -337,7 +335,7 @@ H5O_SHARED_COPY_FILE(H5F_t *file_src, void *_native_src, H5F_t *file_dst,
 
 #ifdef H5O_SHARED_COPY_FILE_REAL
     /* Call native message's copy file callback to copy the message */
-    if(NULL == (dst_mesg = H5O_SHARED_COPY_FILE_REAL(file_src, H5O_SHARED_TYPE, _native_src, file_dst, recompute_size, cpy_info, udata, dxpl_id)))
+    if(NULL == (dst_mesg = H5O_SHARED_COPY_FILE_REAL(file_src, H5O_SHARED_TYPE, _native_src, file_dst, recompute_size, cpy_info, udata)))
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "unable to copy native message to another file")
 #else /* H5O_SHARED_COPY_FILE_REAL */
     /* No copy file callback defined, just copy the message itself */
@@ -349,8 +347,8 @@ H5O_SHARED_COPY_FILE(H5F_t *file_src, void *_native_src, H5F_t *file_dst,
     HDmemset(dst_mesg, 0, sizeof(H5O_shared_t));
 
     /* Handle sharing destination message */
-    if(H5O_shared_copy_file(file_src, file_dst, H5O_SHARED_TYPE, _native_src,
-            dst_mesg, recompute_size, mesg_flags, cpy_info, udata, dxpl_id) < 0)
+    if(H5O__shared_copy_file(file_src, file_dst, H5O_SHARED_TYPE, _native_src,
+            dst_mesg, recompute_size, mesg_flags, cpy_info, udata) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, NULL, "unable to determine if message should be shared")
 
     /* Set return value */
@@ -384,7 +382,7 @@ done:
  */
 static H5_INLINE herr_t
 H5O_SHARED_POST_COPY_FILE(const H5O_loc_t *oloc_src, const void *mesg_src,
-    H5O_loc_t *oloc_dst, void *mesg_dst, unsigned *mesg_flags, hid_t dxpl_id,
+    H5O_loc_t *oloc_dst, void *mesg_dst, unsigned *mesg_flags,
     H5O_copy_t *cpy_info)
 {
     const H5O_shared_t  *shared_src = (const H5O_shared_t *)mesg_src; /* Alias to shared info in native source */
@@ -408,21 +406,21 @@ H5O_SHARED_POST_COPY_FILE(const H5O_loc_t *oloc_src, const void *mesg_src,
 
 #ifdef H5O_SHARED_POST_COPY_FILE_REAL
     /* Call native message's post copy file callback to copy the message */
-    if(H5O_SHARED_POST_COPY_FILE_REAL(oloc_src, mesg_src, oloc_dst, mesg_dst, dxpl_id, cpy_info) <0 )
+    if(H5O_SHARED_POST_COPY_FILE_REAL(oloc_src, mesg_src, oloc_dst, mesg_dst, cpy_info) <0 )
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to copy native message to another file")
 #endif /* H5O_SHARED_POST_COPY_FILE_REAL */
 
     /* Update shared message after the post copy - will short circuit in
      * production if the DEFER pass determined it will not be shared; debug mode
      * verifies that it is indeed the case */
-    if(H5O_shared_post_copy_file(oloc_dst->file, H5O_SHARED_TYPE,
-            shared_src, shared_dst, mesg_flags, dxpl_id, cpy_info) < 0)
+    if(H5O__shared_post_copy_file(oloc_dst->file, H5O_SHARED_TYPE,
+            shared_src, shared_dst, mesg_flags, cpy_info) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to fix shared message in post copy")
 
 #ifdef H5O_SHARED_POST_COPY_FILE_UPD
     /* Call native message's post copy file update callback to update the
      * message */
-    if(H5O_SHARED_POST_COPY_FILE_UPD(oloc_src, mesg_src, oloc_dst, mesg_dst, dxpl_id, cpy_info) < 0)
+    if(H5O_SHARED_POST_COPY_FILE_UPD(oloc_src, mesg_src, oloc_dst, mesg_dst, cpy_info) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, FAIL, "unable to update native message")
 #endif /* H5O_SHARED_POST_COPY_FILE_UPD */
 
@@ -454,8 +452,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5_INLINE herr_t
-H5O_SHARED_DEBUG(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
-    int indent, int fwidth)
+H5O_SHARED_DEBUG(H5F_t *f, const void *_mesg, FILE *stream, int indent,
+    int fwidth)
 {
     const H5O_shared_t *sh_mesg = (const H5O_shared_t *)_mesg;     /* Pointer to shared message portion of actual message */
     herr_t ret_value = SUCCEED;           /* Return value */
@@ -480,7 +478,7 @@ H5O_SHARED_DEBUG(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
     } /* end if */
 
     /* Call native message's debug callback */
-    if(H5O_SHARED_DEBUG_REAL(f, dxpl_id, _mesg, stream, indent, fwidth) < 0)
+    if(H5O_SHARED_DEBUG_REAL(f, _mesg, stream, indent, fwidth) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_WRITEERROR, FAIL, "unable to display native message info")
 
 done:
diff --git a/src/H5Oshmesg.c b/src/H5Oshmesg.c
index a506ce2..136268a 100644
--- a/src/H5Oshmesg.c
+++ b/src/H5Oshmesg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 
@@ -29,13 +27,13 @@
 #include "H5Opkg.h"             /* Object headers			*/
 #include "H5MMprivate.h"	/* Memory management			*/
 
-static void  *H5O_shmesg_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void  *H5O__shmesg_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_shmesg_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void  *H5O_shmesg_copy(const void *_mesg, void *_dest);
 static size_t H5O_shmesg_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_shmesg_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
-			     int indent, int fwidth);
+static herr_t H5O__shmesg_debug(H5F_t *f, const void *_mesg, FILE *stream,
+    int indent, int fwidth);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_SHMESG[1] = {{
@@ -43,7 +41,7 @@ const H5O_msg_class_t H5O_MSG_SHMESG[1] = {{
     "shared message table",     /*message name for debugging            */
     sizeof(H5O_shmesg_table_t),	/*native message size                   */
     0,				/* messages are sharable?       */
-    H5O_shmesg_decode,		/*decode message                        */
+    H5O__shmesg_decode,		/*decode message                        */
     H5O_shmesg_encode,		/*encode message                        */
     H5O_shmesg_copy,            /*copy the native value                 */
     H5O_shmesg_size,		/*raw message size			*/
@@ -58,12 +56,12 @@ const H5O_msg_class_t H5O_MSG_SHMESG[1] = {{
     NULL,			/* post copy native value to file	*/
     NULL,			/* get creation index		        */
     NULL,			/* set creation index		        */
-    H5O_shmesg_debug              /*debug the message			*/
+    H5O__shmesg_debug           /*debug the message			*/
 }};
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_shmesg_decode
+ * Function:	H5O__shmesg_decode
  *
  * Purpose:	Decode a shared message table message and return a pointer
  *              to a newly allocated H5O_shmesg_table_t struct.
@@ -77,13 +75,14 @@ const H5O_msg_class_t H5O_MSG_SHMESG[1] = {{
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_shmesg_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__shmesg_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_shmesg_table_t	*mesg;                  /* Native message */
     void		*ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(f);
@@ -102,7 +101,7 @@ H5O_shmesg_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_shmesg_decode() */
+} /* end H5O__shmesg_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -211,7 +210,7 @@ H5O_shmesg_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const voi
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_shmesg_debug
+ * Function:	H5O__shmesg_debug
  *
  * Purpose:	Prints debugging info for the message.
  *
@@ -223,12 +222,12 @@ H5O_shmesg_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const voi
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_shmesg_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE *stream,
+H5O__shmesg_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream,
     int indent, int fwidth)
 {
     const H5O_shmesg_table_t *mesg = (const H5O_shmesg_table_t *)_mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Sanity check */
     HDassert(f);
@@ -245,5 +244,5 @@ H5O_shmesg_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const vo
 	      "Number of indexes:", mesg->nindexes);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_shmesg_debug() */
+} /* end H5O__shmesg_debug() */
 
diff --git a/src/H5Ostab.c b/src/H5Ostab.c
index bb39e58..87fb771 100644
--- a/src/H5Ostab.c
+++ b/src/H5Ostab.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -37,20 +35,20 @@
 
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_stab_decode(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned mesg_flags, unsigned *ioflags, const uint8_t *p);
+static void *H5O__stab_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags,
+    unsigned *ioflags, size_t p_size, const uint8_t *p);
 static herr_t H5O_stab_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
 static void *H5O_stab_copy(const void *_mesg, void *_dest);
 static size_t H5O_stab_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
-static herr_t H5O_stab_free(void *_mesg);
-static herr_t H5O_stab_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, void *_mesg);
-static void *H5O_stab_copy_file(H5F_t *file_src, void *native_src,
+static herr_t H5O__stab_free(void *_mesg);
+static herr_t H5O__stab_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
+static void *H5O__stab_copy_file(H5F_t *file_src, void *native_src,
     H5F_t *file_dst, hbool_t *recompute_size, unsigned *mesg_flags,
-    H5O_copy_t *cpy_info, void *_udata, hid_t dxpl_id);
-static herr_t H5O_stab_post_copy_file(const H5O_loc_t *src_oloc,
+    H5O_copy_t *cpy_info, void *_udata);
+static herr_t H5O__stab_post_copy_file(const H5O_loc_t *src_oloc,
     const void *mesg_src, H5O_loc_t *dst_oloc, void *mesg_dst,
-    unsigned *mesg_flags, hid_t dxpl_id, H5O_copy_t *cpy_info);
-static herr_t H5O_stab_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg,
+    unsigned *mesg_flags, H5O_copy_t *cpy_info);
+static herr_t H5O__stab_debug(H5F_t *f, const void *_mesg,
     FILE * stream, int indent, int fwidth);
 
 /* This message derives from H5O message class */
@@ -59,22 +57,22 @@ const H5O_msg_class_t H5O_MSG_STAB[1] = {{
     "stab",                 	/*message name for debugging    */
     sizeof(H5O_stab_t),     	/*native message size           */
     0,				/* messages are sharable?       */
-    H5O_stab_decode,        	/*decode message                */
+    H5O__stab_decode,        	/*decode message                */
     H5O_stab_encode,        	/*encode message                */
     H5O_stab_copy,          	/*copy the native value         */
     H5O_stab_size,          	/*size of symbol table entry    */
     NULL,                   	/*default reset method          */
-    H5O_stab_free,	        /* free method			*/
-    H5O_stab_delete,	        /* file delete method		*/
+    H5O__stab_free,	        /* free method			*/
+    H5O__stab_delete,	        /* file delete method		*/
     NULL,			/* link method			*/
     NULL, 			/*set share method		*/
     NULL,		    	/*can share method		*/
     NULL,			/* pre copy native value to file */
-    H5O_stab_copy_file,		/* copy native value to file    */
-    H5O_stab_post_copy_file,	/* post copy native value to file    */
+    H5O__stab_copy_file,	/* copy native value to file    */
+    H5O__stab_post_copy_file,	/* post copy native value to file    */
     NULL,			/* get creation index		*/
     NULL,			/* set creation index		*/
-    H5O_stab_debug         	/*debug the message             */
+    H5O__stab_debug         	/*debug the message             */
 }};
 
 /* Declare a free list to manage the H5O_stab_t struct */
@@ -82,7 +80,7 @@ H5FL_DEFINE_STATIC(H5O_stab_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_stab_decode
+ * Function:    H5O__stab_decode
  *
  * Purpose:     Decode a symbol table message and return a pointer to
  *              a newly allocated one.
@@ -98,8 +96,9 @@ H5FL_DEFINE_STATIC(H5O_stab_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_stab_decode(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh,
-    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags, const uint8_t *p)
+H5O__stab_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
+    unsigned H5_ATTR_UNUSED mesg_flags, unsigned H5_ATTR_UNUSED *ioflags,
+    size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
 {
     H5O_stab_t          *stab = NULL;
     void                *ret_value = NULL;     /* Return value */
@@ -126,7 +125,7 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_stab_decode() */
+} /* end H5O__stab_decode() */
 
 
 /*-------------------------------------------------------------------------
@@ -231,38 +230,36 @@ H5O_stab_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void
     ret_value = (size_t)(2 * H5F_SIZEOF_ADDR(f));
 
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5O_stab_size() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_stab_free
+ * Function:	H5O__stab_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
  * Programmer:	Quincey Koziol
  *              Thursday, March 30, 2000
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_stab_free(void *mesg)
+H5O__stab_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_stab_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_stab_free() */
+} /* end H5O__stab_free() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_stab_delete
+ * Function:    H5O__stab_delete
  *
  * Purpose:     Free file space referenced by message
  *
@@ -274,27 +271,27 @@ H5O_stab_free(void *mesg)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_stab_delete(H5F_t *f, hid_t dxpl_id, H5O_t H5_ATTR_UNUSED *open_oh, void *mesg)
+H5O__stab_delete(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, void *mesg)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(f);
     HDassert(mesg);
 
     /* Free the file space for the symbol table */
-    if(H5G__stab_delete(f, dxpl_id, (const H5O_stab_t *)mesg) < 0)
+    if(H5G__stab_delete(f, (const H5O_stab_t *)mesg) < 0)
         HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free symbol table")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_stab_delete() */
+} /* end H5O__stab_delete() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_stab_copy_file
+ * Function:    H5O__stab_copy_file
  *
  * Purpose:     Copies a message from _MESG to _DEST in file
  *
@@ -308,9 +305,9 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_stab_copy_file(H5F_t *file_src, void *native_src, H5F_t *file_dst,
+H5O__stab_copy_file(H5F_t *file_src, void *native_src, H5F_t *file_dst,
     hbool_t H5_ATTR_UNUSED *recompute_size, unsigned H5_ATTR_UNUSED *mesg_flags,
-    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void *_udata, hid_t dxpl_id)
+    H5O_copy_t H5_ATTR_UNUSED *cpy_info, void *_udata)
 {
     H5O_stab_t          *stab_src = (H5O_stab_t *) native_src;
     H5O_stab_t          *stab_dst = NULL;
@@ -318,7 +315,7 @@ H5O_stab_copy_file(H5F_t *file_src, void *native_src, H5F_t *file_dst,
     size_t              size_hint;             /* Local heap initial size */
     void                *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(stab_src);
@@ -329,18 +326,18 @@ H5O_stab_copy_file(H5F_t *file_src, void *native_src, H5F_t *file_dst,
         HGOTO_ERROR (H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Get the old local heap's size and use that as the hint for the new heap */
-    if(H5HL_get_size(file_src, dxpl_id, stab_src->heap_addr, &size_hint) < 0)
+    if(H5HL_get_size(file_src, stab_src->heap_addr, &size_hint) < 0)
 	HGOTO_ERROR(H5E_SYM, H5E_CANTGETSIZE, NULL, "can't query local heap size")
 
     /* Set copy metadata tag */
-    H5_BEGIN_TAG(dxpl_id, H5AC__COPIED_TAG, NULL);
+    H5_BEGIN_TAG(H5AC__COPIED_TAG);
 
     /* Create components of symbol table message */
-    if(H5G__stab_create_components(file_dst, stab_dst, size_hint, dxpl_id) < 0)
+    if(H5G__stab_create_components(file_dst, stab_dst, size_hint) < 0)
 	HGOTO_ERROR_TAG(H5E_SYM, H5E_CANTINIT, NULL, "can't create symbol table components")
 
     /* Reset metadata tag */
-    H5_END_TAG(NULL);
+    H5_END_TAG
 
     /* Cache stab in udata */
     udata->cache_type = H5G_CACHED_STAB;
@@ -356,11 +353,11 @@ done:
             stab_dst = H5FL_FREE(H5O_stab_t, stab_dst);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_stab_copy_file() */
+} /* H5O__stab_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_stab_post_copy_file
+ * Function:    H5O__stab_post_copy_file
  *
  * Purpose:     Finish copying a message from between files
  *
@@ -372,16 +369,16 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_stab_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
+H5O__stab_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
     H5O_loc_t *dst_oloc, void *mesg_dst, unsigned H5_ATTR_UNUSED *mesg_flags,
-    hid_t dxpl_id, H5O_copy_t *cpy_info)
+    H5O_copy_t *cpy_info)
 {
     const H5O_stab_t    *stab_src = (const H5O_stab_t *)mesg_src;
     H5O_stab_t          *stab_dst = (H5O_stab_t *)mesg_dst;
     H5G_bt_it_cpy_t     udata;      /* B-tree user data */
     herr_t ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* check args */
     HDassert(stab_src);
@@ -402,16 +399,16 @@ H5O_stab_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src,
     udata.cpy_info = cpy_info;
 
     /* Iterate over objects in group, copying them */
-    if((H5B_iterate(src_oloc->file, dxpl_id, H5B_SNODE, stab_src->btree_addr, H5G__node_copy, &udata)) < 0)
+    if((H5B_iterate(src_oloc->file, H5B_SNODE, stab_src->btree_addr, H5G__node_copy, &udata)) < 0)
         HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "iteration operator failed")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5O_stab_post_copy_file() */
+} /* H5O__stab_post_copy_file() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5O_stab_debug
+ * Function:    H5O__stab_debug
  *
  * Purpose:     Prints debugging info for a symbol table message.
  *
@@ -426,12 +423,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_stab_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void *_mesg, FILE * stream,
-	       int indent, int fwidth)
+H5O__stab_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE * stream,
+    int indent, int fwidth)
 {
     const H5O_stab_t       *stab = (const H5O_stab_t *) _mesg;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* check args */
     HDassert(f);
@@ -447,5 +444,5 @@ H5O_stab_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
 	      "Name heap address:", stab->heap_addr);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-}
+} /* end H5O__stab_debug() */
 
diff --git a/src/H5Otest.c b/src/H5Otest.c
index 8f8980a..32b31f2 100644
--- a/src/H5Otest.c
+++ b/src/H5Otest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@hdfgroup.org>
@@ -34,6 +32,7 @@
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5Apkg.h"		/* Attributes	  			*/
 #include "H5ACprivate.h"	/* Metadata cache			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5Opkg.h"             /* Object headers			*/
@@ -99,6 +98,7 @@ H5O_is_attr_dense_test(hid_t oid)
     H5O_t *oh = NULL;           /* Object header */
     H5O_ainfo_t ainfo;          /* Attribute information for object */
     H5O_loc_t *loc;             /* Pointer to object's location */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     htri_t ret_value = FAIL;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -107,15 +107,20 @@ H5O_is_attr_dense_test(hid_t oid)
     if(NULL == (loc = H5O_get_loc(oid)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, H5AC_ind_read_dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, H5AC_ind_read_dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
@@ -130,8 +135,10 @@ H5O_is_attr_dense_test(hid_t oid)
         ret_value = FALSE;
 
 done:
-    if(oh && H5O_unprotect(loc, H5AC_ind_read_dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRESET, FAIL, "can't reset API context")
 
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5O_is_attr_dense_test() */
@@ -164,6 +171,7 @@ H5O_is_attr_empty_test(hid_t oid)
     htri_t ainfo_exists = FALSE;        /* Whether the attribute info exists in the file */
     H5O_loc_t *loc;             /* Pointer to object's location */
     hsize_t nattrs;             /* Number of attributes */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     htri_t ret_value = FAIL;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -172,14 +180,19 @@ H5O_is_attr_empty_test(hid_t oid)
     if(NULL == (loc = H5O_get_loc(oid)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, H5AC_ind_read_dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Check for attribute info stored */
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if((ainfo_exists = H5A_get_ainfo(loc->file, H5AC_ind_read_dxpl_id, oh, &ainfo)) < 0)
+        if((ainfo_exists = H5A__get_ainfo(loc->file, oh, &ainfo)) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
@@ -194,15 +207,15 @@ H5O_is_attr_empty_test(hid_t oid)
                 /* Check for any messages in object header */
                 HDassert(nattrs == 0);
 
-                /* Set metadata tag in dxpl_id */
-                H5_BEGIN_TAG(H5AC_ind_read_dxpl_id, loc->addr, FAIL);
+                /* Set metadata tag in API context */
+                H5_BEGIN_TAG(loc->addr);
 
                 /* Open the name index v2 B-tree */
-                if(NULL == (bt2_name = H5B2_open(loc->file, H5AC_ind_read_dxpl_id, ainfo.name_bt2_addr, NULL)))
+                if(NULL == (bt2_name = H5B2_open(loc->file, ainfo.name_bt2_addr, NULL)))
                     HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
-                /* Reset metadata tag in dxpl_id */
-                H5_END_TAG(FAIL);
+                /* Reset metadata tag in API context */
+                H5_END_TAG
 
                 /* Retrieve # of records in name index */
                 if(H5B2_get_nrec(bt2_name, &nattrs) < 0)
@@ -221,10 +234,12 @@ H5O_is_attr_empty_test(hid_t oid)
 
 done:
     /* Release resources */
-    if(bt2_name && H5B2_close(bt2_name, H5AC_ind_read_dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for name index")
-    if(oh && H5O_unprotect(loc, H5AC_ind_read_dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRESET, FAIL, "can't reset API context")
 
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5O_is_attr_empty_test() */
@@ -257,6 +272,7 @@ H5O_num_attrs_test(hid_t oid, hsize_t *nattrs)
     H5O_ainfo_t ainfo;          /* Attribute information for object */
     H5O_loc_t *loc;             /* Pointer to object's location */
     hsize_t obj_nattrs;         /* Number of attributes */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -265,15 +281,20 @@ H5O_num_attrs_test(hid_t oid, hsize_t *nattrs)
     if(NULL == (loc = H5O_get_loc(oid)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, H5AC_ind_read_dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, H5AC_ind_read_dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
@@ -287,15 +308,15 @@ H5O_num_attrs_test(hid_t oid, hsize_t *nattrs)
             /* Check for any messages in object header */
             HDassert(obj_nattrs == 0);
 
-            /* Set metadata tag in dxpl_id */
-            H5_BEGIN_TAG(H5AC_ind_read_dxpl_id, loc->addr, FAIL);
+            /* Set metadata tag in API context */
+            H5_BEGIN_TAG(loc->addr);
 
             /* Open the name index v2 B-tree */
-            if(NULL == (bt2_name = H5B2_open(loc->file, H5AC_ind_read_dxpl_id, ainfo.name_bt2_addr, NULL)))
+            if(NULL == (bt2_name = H5B2_open(loc->file, ainfo.name_bt2_addr, NULL)))
                 HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
-            /* Reset metadata tag in dxpl_id */
-            H5_END_TAG(FAIL);
+            /* Reset metadata tag in API context */
+            H5_END_TAG
 
             /* Retrieve # of records in name index */
             if(H5B2_get_nrec(bt2_name, &obj_nattrs) < 0)
@@ -311,10 +332,12 @@ H5O_num_attrs_test(hid_t oid, hsize_t *nattrs)
 
 done:
     /* Release resources */
-    if(bt2_name && H5B2_close(bt2_name, H5AC_ind_read_dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for name index")
-    if(oh && H5O_unprotect(loc, H5AC_ind_read_dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRESET, FAIL, "can't reset API context")
 
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5O_num_attrs_test() */
@@ -349,6 +372,7 @@ H5O_attr_dense_info_test(hid_t oid, hsize_t *name_count, hsize_t *corder_count)
     H5B2_t *bt2_corder = NULL;  /* v2 B-tree handle for creation order index */
     H5O_ainfo_t ainfo;          /* Attribute information for object */
     H5O_loc_t *loc;            /* Pointer to object's location */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -357,29 +381,34 @@ H5O_attr_dense_info_test(hid_t oid, hsize_t *name_count, hsize_t *corder_count)
     if(NULL == (loc = H5O_get_loc(oid)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
 
-    /* Set metadata tag in dxpl_id */
-    H5_BEGIN_TAG(H5AC_ind_read_dxpl_id, loc->addr, FAIL);
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
+    /* Set metadata tag in API context */
+    H5_BEGIN_TAG(loc->addr);
 
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, H5AC_ind_read_dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Check for attribute info stored */
     ainfo.fheap_addr = HADDR_UNDEF;
     if(oh->version > H5O_VERSION_1) {
         /* Check for (& retrieve if available) attribute info */
-        if(H5A_get_ainfo(loc->file, H5AC_ind_read_dxpl_id, oh, &ainfo) < 0)
+        if(H5A__get_ainfo(loc->file, oh, &ainfo) < 0)
             HGOTO_ERROR_TAG(H5E_ATTR, H5E_CANTGET, FAIL, "can't check for attribute info message")
     } /* end if */
 
     /* Check for 'dense' attribute storage file addresses being defined */
     if(!H5F_addr_defined(ainfo.fheap_addr))
-        HGOTO_DONE_TAG(FAIL, FAIL)
+        HGOTO_DONE_TAG(FAIL)
     if(!H5F_addr_defined(ainfo.name_bt2_addr))
-        HGOTO_DONE_TAG(FAIL, FAIL)
+        HGOTO_DONE_TAG(FAIL)
 
     /* Open the name index v2 B-tree */
-    if(NULL == (bt2_name = H5B2_open(loc->file, H5AC_ind_read_dxpl_id, ainfo.name_bt2_addr, NULL)))
+    if(NULL == (bt2_name = H5B2_open(loc->file, ainfo.name_bt2_addr, NULL)))
         HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for name index")
 
     /* Retrieve # of records in name index */
@@ -389,7 +418,7 @@ H5O_attr_dense_info_test(hid_t oid, hsize_t *name_count, hsize_t *corder_count)
     /* Check if there is a creation order index */
     if(H5F_addr_defined(ainfo.corder_bt2_addr)) {
         /* Open the creation order index v2 B-tree */
-        if(NULL == (bt2_corder = H5B2_open(loc->file, H5AC_ind_read_dxpl_id, ainfo.corder_bt2_addr, NULL)))
+        if(NULL == (bt2_corder = H5B2_open(loc->file, ainfo.corder_bt2_addr, NULL)))
             HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for creation order index")
 
         /* Retrieve # of records in creation order index */
@@ -399,17 +428,19 @@ H5O_attr_dense_info_test(hid_t oid, hsize_t *name_count, hsize_t *corder_count)
     else
         *corder_count = 0;
 
-    /* Reset metadata tag in dxpl_id */
-    H5_END_TAG(FAIL);
+    /* Reset metadata tag in API context */
+    H5_END_TAG
 
 done:
     /* Release resources */
-    if(bt2_name && H5B2_close(bt2_name, H5AC_ind_read_dxpl_id) < 0)
+    if(bt2_name && H5B2_close(bt2_name) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for name index")
-    if(bt2_corder && H5B2_close(bt2_corder, H5AC_ind_read_dxpl_id) < 0)
+    if(bt2_corder && H5B2_close(bt2_corder) < 0)
         HDONE_ERROR(H5E_OHDR, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for creation order index")
-    if(oh && H5O_unprotect(loc, H5AC_ind_read_dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRESET, FAIL, "can't reset API context")
 
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5O_attr_dense_info_test() */
@@ -452,7 +483,7 @@ H5O_check_msg_marked_test(hid_t oid, hbool_t flag_val)
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
 
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, H5AC_ind_read_dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Locate "unknown" message  */
@@ -471,7 +502,7 @@ H5O_check_msg_marked_test(hid_t oid, hbool_t flag_val)
         HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "'unknown' message type not found")
 
 done:
-    if(oh && H5O_unprotect(loc, H5AC_ind_read_dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -484,9 +515,7 @@ done:
  PURPOSE
     Expunge all the chunks for an object header from the cache.
  USAGE
-    herr_t H5O_expunge_chunks_test(f, dxpl_id, loc)
-        H5F_t *f;               IN: Pointer to file that object is within
-        hid_t dxpl_id;          IN: DXPL to use for operation
+    herr_t H5O_expunge_chunks_test(loc)
         H5O_loc_t *loc;         IN: Object location for object header to expunge
  RETURNS
     Non-negative on success, negative on failure
@@ -500,7 +529,7 @@ done:
  REVISION LOG
 --------------------------------------------------------------------------*/
 herr_t
-H5O_expunge_chunks_test(const H5O_loc_t *loc, hid_t dxpl_id)
+H5O_expunge_chunks_test(const H5O_loc_t *loc)
 {
     H5O_t *oh = NULL;           /* Object header */
     haddr_t chk_addr[16];       /* Array of chunk addresses */
@@ -511,7 +540,7 @@ H5O_expunge_chunks_test(const H5O_loc_t *loc, hid_t dxpl_id)
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__NO_FLAGS_SET, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Safety check */
@@ -523,13 +552,13 @@ H5O_expunge_chunks_test(const H5O_loc_t *loc, hid_t dxpl_id)
         chk_addr[u] = oh->chunk[u].addr;
 
     /* Release the object header */
-    if(H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header")
 
     /* Iterate over all the saved chunk addresses, evicting them from the cache */
     /* (in reverse order, so that chunk #0 is unpinned) */
     for(u = nchunks - 1; u < nchunks; u--)
-        if(H5AC_expunge_entry(loc->file, dxpl_id, (u == 0 ? H5AC_OHDR : H5AC_OHDR_CHK), chk_addr[u], H5AC__NO_FLAGS_SET) < 0)
+        if(H5AC_expunge_entry(loc->file, (u == 0 ? H5AC_OHDR : H5AC_OHDR_CHK), chk_addr[u], H5AC__NO_FLAGS_SET) < 0)
             HGOTO_ERROR(H5E_OHDR, H5E_CANTEXPUNGE, FAIL, "unable to expunge object header chunk")
 
 done:
@@ -543,9 +572,8 @@ done:
  PURPOSE
     Retrieve the refcount for the object header
  USAGE
-    herr_t H5O_expunge_chunks_test(loc, dxpl_id, rc)
+    herr_t H5O_expunge_chunks_test(loc, rc)
         const H5O_loc_t *loc;   IN: Object location for object header to query
-        hid_t dxpl_id;          IN: DXPL to use for operation
         unsigned *rc;           OUT: Pointer to refcount for object header
  RETURNS
     Non-negative on success, negative on failure
@@ -559,7 +587,7 @@ done:
  REVISION LOG
 --------------------------------------------------------------------------*/
 herr_t
-H5O_get_rc(const H5O_loc_t *loc, hid_t dxpl_id, unsigned *rc)
+H5O_get_rc(const H5O_loc_t *loc, unsigned *rc)
 {
     H5O_t *oh = NULL;           /* Object header */
     herr_t ret_value = SUCCEED; /* Return value */
@@ -571,7 +599,7 @@ H5O_get_rc(const H5O_loc_t *loc, hid_t dxpl_id, unsigned *rc)
     HDassert(rc);
 
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to protect object header")
 
     /* Save the refcount for the object header */
@@ -579,7 +607,7 @@ H5O_get_rc(const H5O_loc_t *loc, hid_t dxpl_id, unsigned *rc)
 
 done:
     /* Release the object header */
-    if(oh && H5O_unprotect(loc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to unprotect object header")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -614,6 +642,7 @@ H5O_msg_get_chunkno_test(hid_t oid, unsigned msg_type, unsigned *chunk_num)
     H5O_loc_t *loc;            /* Pointer to object's location */
     H5O_mesg_t *idx_msg;        /* Pointer to message */
     unsigned idx;               /* Index of message */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -622,8 +651,13 @@ H5O_msg_get_chunkno_test(hid_t oid, unsigned msg_type, unsigned *chunk_num)
     if(NULL == (loc = H5O_get_loc(oid)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, H5AC_ind_read_dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__READ_ONLY_FLAG, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Locate first message of given type */
@@ -641,8 +675,10 @@ H5O_msg_get_chunkno_test(hid_t oid, unsigned msg_type, unsigned *chunk_num)
         HGOTO_ERROR(H5E_OHDR, H5E_NOTFOUND, FAIL, "message of type not found")
 
 done:
-    if(oh && H5O_unprotect(loc, H5AC_ind_read_dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRESET, FAIL, "can't reset API context")
 
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5O_msg_get_chunkno_test() */
@@ -674,6 +710,7 @@ H5O_msg_move_to_new_chunk_test(hid_t oid, unsigned msg_type)
     H5O_loc_t *loc;             /* Pointer to object's location */
     H5O_mesg_t *curr_msg;       /* Pointer to current message */
     unsigned idx;               /* Index of message */
+    hbool_t     api_ctx_pushed = FALSE;             /* Whether API context pushed */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -682,8 +719,13 @@ H5O_msg_move_to_new_chunk_test(hid_t oid, unsigned msg_type)
     if(NULL == (loc = H5O_get_loc(oid)))
         HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "object not found")
 
+    /* Set API context */
+    if(H5CX_push() < 0)
+        HGOTO_ERROR(H5E_OHDR, H5E_CANTSET, FAIL, "can't set API context")
+    api_ctx_pushed = TRUE;
+
     /* Get the object header */
-    if(NULL == (oh = H5O_protect(loc, H5AC_ind_read_dxpl_id, H5AC__NO_FLAGS_SET, FALSE)))
+    if(NULL == (oh = H5O_protect(loc, H5AC__NO_FLAGS_SET, FALSE)))
 	HGOTO_ERROR(H5E_OHDR, H5E_CANTPROTECT, FAIL, "unable to load object header")
 
     /* Locate first message of given type */
@@ -733,7 +775,7 @@ H5O_msg_move_to_new_chunk_test(hid_t oid, unsigned msg_type)
 
             /* Allocate and initialize new chunk in the file, moving the found message */
             /* (*new_idx returned from this routine is unused here) */
-            if(H5O__alloc_chunk(loc->file, H5AC_ind_read_dxpl_id, oh, 40, oh->nmesgs, &found_msg, &new_idx) < 0)
+            if(H5O__alloc_chunk(loc->file, oh, (curr_msg->raw_size + (size_t)H5O_SIZEOF_MSGHDR_OH(oh)), oh->nmesgs, &found_msg, &new_idx) < 0)
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, FAIL, "can't allocate new object header chunk")
 
             /* Break out of loop, the message was found */
@@ -741,8 +783,10 @@ H5O_msg_move_to_new_chunk_test(hid_t oid, unsigned msg_type)
         } /* end if */
 
 done:
-    if(oh && H5O_unprotect(loc, H5AC_ind_read_dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+    if(oh && H5O_unprotect(loc, oh, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_OHDR, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
+    if(api_ctx_pushed && H5CX_pop() < 0)
+        HDONE_ERROR(H5E_OHDR, H5E_CANTRESET, FAIL, "can't reset API context")
 
     FUNC_LEAVE_NOAPI(ret_value)
 }   /* H5O_msg_get_chunkno_test() */
diff --git a/src/H5Ounknown.c b/src/H5Ounknown.c
index 546e839..dbab28c 100644
--- a/src/H5Ounknown.c
+++ b/src/H5Ounknown.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -34,7 +32,7 @@
 
 
 /* PRIVATE PROTOTYPES */
-static herr_t H5O_unknown_free(void *_mesg);
+static herr_t H5O__unknown_free(void *_mesg);
 
 /* This message derives from H5O message class */
 const H5O_msg_class_t H5O_MSG_UNKNOWN[1] = {{
@@ -47,7 +45,7 @@ const H5O_msg_class_t H5O_MSG_UNKNOWN[1] = {{
     NULL,			/*copy the native value         */
     NULL,			/*size of symbol table entry    */
     NULL,                   	/*default reset method          */
-    H5O_unknown_free,	        /* free method			*/
+    H5O__unknown_free,	        /* free method			*/
     NULL,			/* file delete method		*/
     NULL,			/* link method			*/
     NULL, 			/*set share method		*/
@@ -65,9 +63,9 @@ H5FL_DEFINE(H5O_unknown_t);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_unknown_free
+ * Function:	H5O__unknown_free
  *
- * Purpose:	Free's the message
+ * Purpose:	Frees the message
  *
  * Return:	Non-negative on success/Negative on failure
  *
@@ -77,14 +75,14 @@ H5FL_DEFINE(H5O_unknown_t);
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_unknown_free(void *mesg)
+H5O__unknown_free(void *mesg)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(mesg);
 
     mesg = H5FL_FREE(H5O_unknown_t, mesg);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5O_unknown_free() */
+} /* end H5O__unknown_free() */
 
diff --git a/src/H5P.c b/src/H5P.c
index 254c3a9..f163e9e 100644
--- a/src/H5P.c
+++ b/src/H5P.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
@@ -29,6 +27,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5Ppkg.h"		/* Property lists		  	*/
diff --git a/src/H5PB.c b/src/H5PB.c
index 575903d..dab69f4 100644
--- a/src/H5PB.c
+++ b/src/H5PB.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -125,8 +123,8 @@ typedef struct {
 /* Local Prototypes */
 /********************/
 static herr_t H5PB__insert_entry(H5PB_t *page_buf, H5PB_entry_t *page_entry);
-static htri_t H5PB__make_space(const H5F_io_info2_t *fio_info, H5PB_t *page_buf, H5FD_mem_t inserted_type);
-static herr_t H5PB__write_entry(const H5F_io_info2_t *fio_info, H5PB_entry_t *page_entry);
+static htri_t H5PB__make_space(H5F_t *f, H5PB_t *page_buf, H5FD_mem_t inserted_type);
+static herr_t H5PB__write_entry(H5F_t *f, H5PB_entry_t *page_entry);
 
 
 /*********************/
@@ -371,18 +369,18 @@ static herr_t
 H5PB__flush_cb(void *item, void H5_ATTR_UNUSED *key, void *_op_data)
 {
     H5PB_entry_t *page_entry = (H5PB_entry_t *)item;    /* Pointer to page entry node */
-    const H5F_io_info2_t *fio_info = (const H5F_io_info2_t *)_op_data;
+    H5F_t *f = (H5F_t *)_op_data;
     herr_t  ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(page_entry);
-    HDassert(fio_info);
+    HDassert(f);
 
     /* Flush the page if it's dirty */
     if(page_entry->is_dirty)
-        if(H5PB__write_entry(fio_info, page_entry) < 0)
+        if(H5PB__write_entry(f, page_entry) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, "file write failed")
 
 done:
@@ -402,24 +400,21 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PB_flush(const H5F_io_info2_t *fio_info)
+H5PB_flush(H5F_t *f)
 {
     herr_t  ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity check */
-    HDassert(fio_info);
-    HDassert(fio_info->f);
-    HDassert(fio_info->meta_dxpl);
-    HDassert(fio_info->raw_dxpl);
+    HDassert(f);
 
     /* Flush all the entries in the PB skiplist, if we have write access on the file */
-    if(fio_info->f->shared->page_buf && (H5F_ACC_RDWR & H5F_INTENT(fio_info->f))) {
-        H5PB_t *page_buf = fio_info->f->shared->page_buf;
+    if(f->shared->page_buf && (H5F_ACC_RDWR & H5F_INTENT(f))) {
+        H5PB_t *page_buf = f->shared->page_buf;
 
         /* Iterate over all entries in page buffer skip list */
-        if(H5SL_iterate(page_buf->slist_ptr, H5PB__flush_cb, (void *)fio_info))
+        if(H5SL_iterate(page_buf->slist_ptr, H5PB__flush_cb, (void *)f))
             HGOTO_ERROR(H5E_PAGEBUF, H5E_BADITER, FAIL, "can't flush page buffer skip list")
     } /* end if */
 
@@ -477,16 +472,13 @@ H5PB__dest_cb(void *item, void H5_ATTR_UNUSED *key, void *_op_data)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PB_dest(const H5F_io_info2_t *fio_info)
+H5PB_dest(H5F_t *f)
 {
     herr_t  ret_value = SUCCEED;        /* Return value */
-    H5F_t  *f;                          /* file pointer */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity checks */
-    HDassert(fio_info);
-    f = fio_info->f;
     HDassert(f);
 
     /* flush and destroy the page buffer, if it exists */
@@ -494,7 +486,7 @@ H5PB_dest(const H5F_io_info2_t *fio_info)
         H5PB_t *page_buf = f->shared->page_buf;
         H5PB_ud1_t op_data;                 /* Iteration context */
 
-        if(H5PB_flush(fio_info)<0)
+        if(H5PB_flush(f) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTFLUSH, FAIL, "can't flush page buffer")
 
         /* Set up context info */
@@ -514,10 +506,6 @@ H5PB_dest(const H5F_io_info2_t *fio_info)
         if(H5FL_fac_term(page_buf->page_fac) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTRELEASE, FAIL, "can't destroy page buffer page factory")
 
-#ifdef QAK
-H5PB_print_stats(page_buf);
-#endif /* QAK */
-
         f->shared->page_buf = H5FL_FREE(H5PB_t, page_buf);
     } /* end if */
 
@@ -695,12 +683,11 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
-    size_t size, void *buf/*out*/)
+H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size, void *buf/*out*/)
 {
     H5PB_t *page_buf;                   /* Page buffering info for this file */
     H5PB_entry_t *page_entry;           /* Pointer to the corresponding page entry */
-    H5FD_io_info_t fdio_info;           /* File driver I/O info */
+    H5FD_t *file;                       /* File driver pointer */
     haddr_t first_page_addr, last_page_addr;    /* Addresses of the first and last pages covered by I/O */
     haddr_t offset;
     haddr_t search_addr;                /* Address of current page */
@@ -713,20 +700,21 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity checks */
-    HDassert(fio_info);
+    HDassert(f);
+    HDassert(type != H5FD_MEM_GHEAP);
 
     /* Get pointer to page buffer info for this file */
-    page_buf = fio_info->f->shared->page_buf;
+    page_buf = f->shared->page_buf;
 
 #ifdef H5_HAVE_PARALLEL
-    if(H5F_HAS_FEATURE(fio_info->f, H5FD_FEAT_HAS_MPI)) {
+    if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
 #if 1
         bypass_pb = TRUE;
 #else
         /* MSC - why this stopped working ? */
         int mpi_size;
 
-        if((mpi_size = H5F_mpi_get_size(fio_info->f)) < 0)
+        if((mpi_size = H5F_mpi_get_size(f)) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, "can't retrieve MPI communicator size")
         if(1 != mpi_size)
             bypass_pb = TRUE;
@@ -740,12 +728,12 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
      */
     if(NULL == page_buf || size >= page_buf->page_size ||
            (bypass_pb && H5FD_MEM_DRAW == type)) {
-        if(H5F__accum_read(fio_info, type, addr, size, buf) < 0)
+        if(H5F__accum_read(f, type, addr, size, buf) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, "read through metadata accumulator failed")
 
         /* Update statistics */
         if(page_buf) {
-            if(type == H5FD_MEM_DRAW || type == H5FD_MEM_GHEAP)
+            if(type == H5FD_MEM_DRAW)
                 page_buf->bypasses[1] ++;
             else
                 page_buf->bypasses[0] ++;
@@ -761,7 +749,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
 
     /* Update statistics */
     if(page_buf) {
-        if(type == H5FD_MEM_DRAW || type == H5FD_MEM_GHEAP)
+        if(type == H5FD_MEM_DRAW)
             page_buf->accesses[1]++;
         else
             page_buf->accesses[0]++;
@@ -791,9 +779,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
     } /* end else */
 
     /* Translate to file driver I/O info object */
-    fdio_info.file = fio_info->f->shared->lf;
-    fdio_info.meta_dxpl = fio_info->meta_dxpl;
-    fdio_info.raw_dxpl = fio_info->raw_dxpl;
+    file = f->shared->lf;
 
     /* Copy raw data from dirty pages into the read buffer if the read
        request spans pages in the page buffer*/
@@ -892,7 +878,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                 H5PB__MOVE_TO_TOP_LRU(page_buf, page_entry)
 
                 /* Update statistics */
-                if(type == H5FD_MEM_DRAW || type == H5FD_MEM_GHEAP)
+                if(type == H5FD_MEM_DRAW)
                     page_buf->hits[1]++;
                 else
                     page_buf->hits[0]++;
@@ -908,7 +894,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                     htri_t can_make_space;
 
                     /* check if we can make space in page buffer */
-                    if((can_make_space = H5PB__make_space(fio_info, page_buf, type)) < 0)
+                    if((can_make_space = H5PB__make_space(f, page_buf, type)) < 0)
                         HGOTO_ERROR(H5E_PAGEBUF, H5E_NOSPACE, FAIL, "make space in Page buffer Failed")
 
                     /* if make_space returns 0, then we can't use the page
@@ -918,7 +904,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                         HDassert(0 == i);
 
                         /* read entire block from VFD and return */
-                        if(H5FD_read(&fdio_info, type, addr, size, buf) < 0)
+                        if(H5FD_read(file, type, addr, size, buf) < 0)
                             HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, "driver read request failed")
 
                         /* Break out of loop */
@@ -933,7 +919,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                 /* Read page through the VFD layer, but make sure we don't read past the EOA. */
 
                 /* Retrieve the 'eoa' for the file */
-                if(HADDR_UNDEF == (eoa = H5F_get_eoa(fio_info->f, type)))
+                if(HADDR_UNDEF == (eoa = H5F_get_eoa(f, type)))
                     HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, "driver get_eoa request failed")
 
                 /* If the entire page falls outside the EOA, then fail */
@@ -945,7 +931,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                     page_size = (size_t)(eoa - search_addr);
 
                 /* Read page from VFD */
-                if(H5FD_read(&fdio_info, type, search_addr, page_size, new_page_buf) < 0)
+                if(H5FD_read(file, type, search_addr, page_size, new_page_buf) < 0)
                     HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, "driver read request failed")
 
                 /* Copy the requested data from the page into the input buffer */
@@ -967,7 +953,7 @@ H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                     HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTSET, FAIL, "error inserting new page in page buffer")
 
                 /* Update statistics */
-                if(type == H5FD_MEM_DRAW || type == H5FD_MEM_GHEAP)
+                if(type == H5FD_MEM_DRAW)
                     page_buf->misses[1]++;
                 else
                     page_buf->misses[0]++;
@@ -994,12 +980,12 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
+H5PB_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
     size_t size, const void *buf)
 {
     H5PB_t *page_buf;                   /* Page buffering info for this file */
     H5PB_entry_t *page_entry;           /* Pointer to the corresponding page entry */
-    H5FD_io_info_t fdio_info;           /* File driver I/O info */
+    H5FD_t *file;                       /* File driver pointer */
     haddr_t first_page_addr, last_page_addr;    /* Addresses of the first and last pages covered by I/O */
     haddr_t offset;
     haddr_t search_addr;                /* Address of current page */
@@ -1012,21 +998,20 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity checks */
-    HDassert(fio_info);
-    HDassert(fio_info->f);
+    HDassert(f);
 
     /* Get pointer to page buffer info for this file */
-    page_buf = fio_info->f->shared->page_buf;
+    page_buf = f->shared->page_buf;
 
 #ifdef H5_HAVE_PARALLEL
-    if(H5F_HAS_FEATURE(fio_info->f, H5FD_FEAT_HAS_MPI)) {
+    if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
 #if 1
         bypass_pb = TRUE;
 #else
         /* MSC - why this stopped working ? */
         int mpi_size;
 
-        if((mpi_size = H5F_mpi_get_size(fio_info->f)) < 0)
+        if((mpi_size = H5F_mpi_get_size(f)) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, "can't retrieve MPI communicator size")
         if(1 != mpi_size)
             bypass_pb = TRUE;
@@ -1039,7 +1024,7 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
      * buffering.
      */
     if(NULL == page_buf || size >= page_buf->page_size || bypass_pb) {
-        if(H5F__accum_write(fio_info, type, addr, size, buf) < 0)
+        if(H5F__accum_write(f, type, addr, size, buf) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, "write through metadata accumulator failed")
 
         /* Update statistics */
@@ -1098,9 +1083,7 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
     } /* end else */
 
     /* Translate to file driver I/O info object */
-    fdio_info.file = fio_info->f->shared->lf;
-    fdio_info.meta_dxpl = fio_info->meta_dxpl;
-    fdio_info.raw_dxpl = fio_info->raw_dxpl;
+    file = f->shared->lf;
 
     /* Check if existing pages for raw data need to be updated since raw data access is not atomic */
     if(H5FD_MEM_DRAW == type && size >= page_buf->page_size) {
@@ -1212,7 +1195,7 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                     htri_t can_make_space;
 
                     /* Check if we can make space in page buffer */
-                    if((can_make_space = H5PB__make_space(fio_info, page_buf, type)) < 0)
+                    if((can_make_space = H5PB__make_space(f, page_buf, type)) < 0)
                         HGOTO_ERROR(H5E_PAGEBUF, H5E_NOSPACE, FAIL, "make space in Page buffer Failed")
 
                     /* If make_space returns 0, then we can't use the page
@@ -1222,7 +1205,7 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                         HDassert(0 == i);
 
                         /* Write to VFD and return */
-                        if(H5FD_write(&fdio_info, type, addr, size, buf) < 0)
+                        if(H5FD_write(file, type, addr, size, buf) < 0)
                             HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, "driver write request failed")
                         
                         /* Break out of loop */
@@ -1231,7 +1214,7 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                 } /* end if */
 
                 /* Don't bother searching if there is no write access */
-                if(H5F_ACC_RDWR & H5F_INTENT(fio_info->f))
+                if(H5F_ACC_RDWR & H5F_INTENT(f))
                     /* Lookup & remove the page from the new skip list page if
                      * it exists to see if this is a new page from the MF layer
                      */
@@ -1274,7 +1257,7 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                     page_entry->type = (H5F_mem_page_t)type;
 
                     /* Retrieve the 'eoa' for the file */
-                    if(HADDR_UNDEF == (eoa = H5F_get_eoa(fio_info->f, type)))
+                    if(HADDR_UNDEF == (eoa = H5F_get_eoa(f, type)))
                         HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, "driver get_eoa request failed")
 
                     /* If the entire page falls outside the EOA, then fail */
@@ -1285,8 +1268,8 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                      * returned will most likely be HADDR_UNDEF, so skip
                      * that check.
                      */
-                    if(!H5F_HAS_FEATURE(fio_info->f, H5FD_FEAT_HAS_MPI))
-                        if(HADDR_UNDEF == (eof = H5FD_get_eof(fio_info->f->shared->lf, H5FD_MEM_DEFAULT)))
+                    if(!H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI))
+                        if(HADDR_UNDEF == (eof = H5FD_get_eof(f->shared->lf, H5FD_MEM_DEFAULT)))
                             HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, "driver get_eof request failed")
 
                     /* Adjust the read size to not go beyond the EOA */
@@ -1294,7 +1277,7 @@ H5PB_write(const H5F_io_info2_t *fio_info, H5FD_mem_t type, haddr_t addr,
                         page_size = (size_t)(eoa - search_addr);
 
                     if(search_addr < eof) {
-                        if(H5FD_read(&fdio_info, type, search_addr, page_size, new_page_buf) < 0)
+                        if(H5FD_read(file, type, search_addr, page_size, new_page_buf) < 0)
                             HGOTO_ERROR(H5E_PAGEBUF, H5E_READERROR, FAIL, "driver read request failed")
 
                         /* Update statistics */
@@ -1395,8 +1378,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static htri_t 
-H5PB__make_space(const H5F_io_info2_t *fio_info, H5PB_t *page_buf,
-    H5FD_mem_t inserted_type)
+H5PB__make_space(H5F_t *f, H5PB_t *page_buf, H5FD_mem_t inserted_type)
 {
     H5PB_entry_t *page_entry;   /* Pointer to page eviction candidate */
     htri_t ret_value = TRUE;    /* Return value */
@@ -1404,7 +1386,7 @@ H5PB__make_space(const H5F_io_info2_t *fio_info, H5PB_t *page_buf,
     FUNC_ENTER_STATIC
 
     /* Sanity check */
-    HDassert(fio_info);
+    HDassert(f);
     HDassert(page_buf);
 
     /* Get oldest entry */
@@ -1461,7 +1443,7 @@ H5PB__make_space(const H5F_io_info2_t *fio_info, H5PB_t *page_buf,
 
     /* Flush page if dirty */
     if(page_entry->is_dirty)
-        if(H5PB__write_entry(fio_info, page_entry) < 0)
+        if(H5PB__write_entry(f, page_entry) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, "file write failed")
 
     /* Update statistics */
@@ -1495,7 +1477,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5PB__write_entry(const H5F_io_info2_t *fio_info, H5PB_entry_t *page_entry)
+H5PB__write_entry(H5F_t *f, H5PB_entry_t *page_entry)
 {
     haddr_t eoa;                    /* Current EOA for the file */
     herr_t ret_value = SUCCEED;    /* Return value */
@@ -1503,31 +1485,28 @@ H5PB__write_entry(const H5F_io_info2_t *fio_info, H5PB_entry_t *page_entry)
     FUNC_ENTER_STATIC
 
     /* Sanity check */
-    HDassert(fio_info);
-    HDassert(fio_info->f);
+    HDassert(f);
     HDassert(page_entry);
 
     /* Retrieve the 'eoa' for the file */
-    if(HADDR_UNDEF == (eoa = H5F_get_eoa(fio_info->f, page_entry->type)))
+    if(HADDR_UNDEF == (eoa = H5F_get_eoa(f, (H5FD_mem_t)page_entry->type)))
         HGOTO_ERROR(H5E_PAGEBUF, H5E_CANTGET, FAIL, "driver get_eoa request failed")
 
     /* If the starting address of the page is larger than
      * the EOA, then the entire page is discarded without writing.
      */
     if(page_entry->addr <= eoa) {
-        H5FD_io_info_t fdio_info;           /* File driver I/O info */
-        size_t page_size = fio_info->f->shared->page_buf->page_size;
+        H5FD_t *file;                   /* File driver I/O info */
+        size_t page_size = f->shared->page_buf->page_size;
 
         /* Adjust the page length if it exceeds the EOA */
         if((page_entry->addr + page_size) > eoa)
             page_size = (size_t)(eoa - page_entry->addr);
 
         /* Translate to file driver I/O info object */
-        fdio_info.file = fio_info->f->shared->lf;
-        fdio_info.meta_dxpl = fio_info->meta_dxpl;
-        fdio_info.raw_dxpl = fio_info->raw_dxpl;
+        file = f->shared->lf;
 
-        if(H5FD_write(&fdio_info, page_entry->type, page_entry->addr, page_size, page_entry->page_buf_ptr) < 0)
+        if(H5FD_write(file, (H5FD_mem_t)page_entry->type, page_entry->addr, page_size, page_entry->page_buf_ptr) < 0)
             HGOTO_ERROR(H5E_PAGEBUF, H5E_WRITEERROR, FAIL, "file write failed")
     } /* end if */
 
diff --git a/src/H5PBmodule.h b/src/H5PBmodule.h
index 35da3f6..c8aabb6 100644
--- a/src/H5PBmodule.h
+++ b/src/H5PBmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5PBpkg.h b/src/H5PBpkg.h
index 976f18d..6b9168b 100644
--- a/src/H5PBpkg.h
+++ b/src/H5PBpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #if !(defined H5PB_FRIEND || defined H5PB_MODULE)
diff --git a/src/H5PBprivate.h b/src/H5PBprivate.h
index 7dd4071..aef87e1 100644
--- a/src/H5PBprivate.h
+++ b/src/H5PBprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -88,15 +86,15 @@ typedef struct H5PB_t {
 
 /* General routines */
 H5_DLL herr_t H5PB_create(H5F_t *file, size_t page_buffer_size, unsigned page_buf_min_meta_perc, unsigned page_buf_min_raw_perc);
-H5_DLL herr_t H5PB_flush(const H5F_io_info2_t *fio_info);
-H5_DLL herr_t H5PB_dest(const H5F_io_info2_t *fio_info);
+H5_DLL herr_t H5PB_flush(H5F_t *f);
+H5_DLL herr_t H5PB_dest(H5F_t *f);
 H5_DLL herr_t H5PB_add_new_page(H5F_t *f, H5FD_mem_t type, haddr_t page_addr);
 H5_DLL herr_t H5PB_update_entry(H5PB_t *page_buf, haddr_t addr, size_t size, const void *buf);
 H5_DLL herr_t H5PB_remove_entry(const H5F_t *f, haddr_t addr);
-H5_DLL herr_t H5PB_read(const H5F_io_info2_t *fio_info, H5FD_mem_t type,
-    haddr_t addr, size_t size, void *buf/*out*/);
-H5_DLL herr_t H5PB_write(const H5F_io_info2_t *f, H5FD_mem_t type, haddr_t addr,
-    size_t size, const void *buf);
+H5_DLL herr_t H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
+    void *buf/*out*/);
+H5_DLL herr_t H5PB_write(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size,
+    const void *buf);
 
 /* Statistics routines */
 H5_DLL herr_t H5PB_reset_stats(H5PB_t *page_buf);
diff --git a/src/H5PL.c b/src/H5PL.c
index bfa3ace..fc42554 100644
--- a/src/H5PL.c
+++ b/src/H5PL.c
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5. The full HDF5 copyright notice, including      *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic document set and is     *
- * linked from the top-level documents page.  It can also be found at        *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access   *
- * to either file, you may request a copy from help@hdfgroup.org.            *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -24,135 +22,28 @@
 /***********/
 #include "H5private.h"      /* Generic Functions            */
 #include "H5Eprivate.h"     /* Error handling               */
-#include "H5MMprivate.h"    /* Memory management            */
 #include "H5PLpkg.h"        /* Plugin                       */
-#include "H5Zprivate.h"     /* Filter pipeline              */
 
 
 /****************/
 /* Local Macros */
 /****************/
-#ifdef H5_HAVE_WIN32_API
-#define H5PL_EXPAND_ENV_VAR {                                                            \
-        long bufCharCount;                                                               \
-        char *tempbuf;                                                                   \
-        if(NULL == (tempbuf = (char *)H5MM_malloc(H5PL_EXPAND_BUFFER_SIZE)))             \
-            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for expanded path")                          \
-        if((bufCharCount = ExpandEnvironmentStringsA(dl_path, tempbuf, H5PL_EXPAND_BUFFER_SIZE)) > H5PL_EXPAND_BUFFER_SIZE) { \
-            tempbuf = (char *)H5MM_xfree(tempbuf);                                       \
-            HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "expanded path is too long")      \
-        }                                                                                \
-        if(bufCharCount == 0) {                                                          \
-            tempbuf = (char *)H5MM_xfree(tempbuf);                                       \
-            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "failed to expand path")          \
-        }                                                                                \
-        dl_path = (char *)H5MM_xfree(dl_path);                                           \
-        dl_path = tempbuf;                                                               \
- }
-#else
-#define H5PL_EXPAND_ENV_VAR
-#endif /* H5_HAVE_WIN32_API */
-
-/****************************/
-/* Macros for supporting
- * both Windows and Unix */
-/****************************/
-/* Windows support
- *
- * SPECIAL WINDOWS NOTE
- *
- * Some of the Win32 API functions expand to fooA or fooW depending on
- * whether UNICODE or _UNICODE are defined. You MUST explicitly use
- * the A version of the functions to force char * behavior until we
- * work out a scheme for proper Windows Unicode support.
- *
- * If you do not do this, people will be unable to incorporate our
- * source code into their own CMake builds if they define UNICODE.
- */
-#ifdef H5_HAVE_WIN32_API
-
-#define H5PL_PATH_SEPARATOR     ";"
-
-/* Handle for dynamic library */
-#define H5PL_HANDLE HINSTANCE
-
-/* Get a handle to a plugin library.  Windows: TEXT macro handles Unicode strings */
-#define H5PL_OPEN_DLIB(S) LoadLibraryExA(S, NULL, LOAD_WITH_ALTERED_SEARCH_PATH)
-
-/* Get the address of a symbol in dynamic library */
-#define H5PL_GET_LIB_FUNC(H,N) GetProcAddress(H,N)
-
-/* Close dynamic library */
-#define H5PL_CLOSE_LIB(H) FreeLibrary(H)
-
-/* Clear error - nothing to do */
-#define H5PL_CLR_ERROR
-
-/* maximum size for expanding env vars */
-#define H5PL_EXPAND_BUFFER_SIZE 32767
-
-typedef const void *(__cdecl *H5PL_get_plugin_info_t)(void);
-
-/* Unix support */
-#else /* H5_HAVE_WIN32_API */
-
-#define H5PL_PATH_SEPARATOR     ":"
-
-/* Handle for dynamic library */
-#define H5PL_HANDLE void *
-
-/* Get a handle to a plugin library.  Windows: TEXT macro handles Unicode strings */
-#define H5PL_OPEN_DLIB(S) dlopen(S, RTLD_LAZY)
-
-/* Get the address of a symbol in dynamic library */
-#define H5PL_GET_LIB_FUNC(H,N) dlsym(H,N)
-
-/* Close dynamic library */
-#define H5PL_CLOSE_LIB(H) dlclose(H)
-
-/* Clear error */
-#define H5PL_CLR_ERROR HERROR(H5E_PLUGIN, H5E_CANTGET, "can't dlopen:%s", dlerror())
-
-typedef const void *(*H5PL_get_plugin_info_t)(void);
-#endif /* H5_HAVE_WIN32_API */
-
-/* Whether to preload pathnames for plugin libraries */
-#define H5PL_DEFAULT_PATH       H5_DEFAULT_PLUGINDIR
-
-/* Special symbol to indicate no plugin loading */
-#define H5PL_NO_PLUGIN          "::"
 
 
 /******************/
 /* Local Typedefs */
 /******************/
 
-/* Type for the list of info for opened plugin libraries */
-typedef struct H5PL_table_t {
-    H5PL_type_t pl_type;            /* plugin type          */
-    int         pl_id;              /* ID for the plugin    */
-    H5PL_HANDLE handle;             /* plugin handle        */
-} H5PL_table_t;
-
 
 /********************/
 /* Local Prototypes */
 /********************/
 
-static herr_t H5PL__init_path_table(void);
-static htri_t H5PL__find(H5PL_type_t plugin_type, int type_id, char *dir, const void **info);
-static htri_t H5PL__open(H5PL_type_t pl_type, char *libname, int plugin_id, const void **pl_info);
-static htri_t H5PL__search_table(H5PL_type_t plugin_type, int type_id, const void **info);
-static herr_t H5PL__close(H5PL_HANDLE handle);
-
 
 /*********************/
 /* Package Variables */
 /*********************/
 
-/* Package initialization variable */
-hbool_t H5_PKG_INIT_VAR = FALSE;
-
 
 /*****************************/
 /* Library Private Variables */
@@ -163,145 +54,43 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
 /* Local Variables */
 /*******************/
 
-/* Table for opened plugin libraries */
-static size_t           H5PL_table_alloc_g = 0;
-static size_t           H5PL_table_used_g = 0;
-static H5PL_table_t     *H5PL_table_g = NULL;
-
-/* Table of location paths for plugin libraries */
-static char             *H5PL_path_table_g[H5PL_MAX_PATH_NUM];
-static size_t           H5PL_num_paths_g = 0;
-static hbool_t          H5PL_path_found_g = FALSE;
-
-/* Enable all plugin libraries */
-static unsigned int     H5PL_plugin_g = H5PL_ALL_PLUGIN;
-
-
-
-/*--------------------------------------------------------------------------
-NAME
-   H5PL__init_package -- Initialize interface-specific information
-USAGE
-    herr_t H5PL__init_package()
-RETURNS
-    Non-negative on success/Negative on failure
-DESCRIPTION
-    Initializes any interface-specific data or routines.
-
---------------------------------------------------------------------------*/
-herr_t
-H5PL__init_package(void)
-{
-    char        *preload_path;
-
-    FUNC_ENTER_PACKAGE_NOERR
-
-    /* Retrieve pathnames from HDF5_PLUGIN_PRELOAD if the user sets it
-     * to tell the library to load plugin libraries without search.
-     */
-    if(NULL != (preload_path = HDgetenv("HDF5_PLUGIN_PRELOAD")))
-        /* Special symbal "::" means no plugin during data reading. */
-        if(!HDstrcmp(preload_path, H5PL_NO_PLUGIN))
-            H5PL_plugin_g = 0;
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5PL__init_package() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5PL_term_package
+ * Function:    H5PLset_loading_state
  *
- * Purpose:     Terminate the H5PL interface: release all memory, reset all
- *              global variables to initial values. This only happens if all
- *              types have been destroyed from other interfaces.
+ * Purpose:     Control the loading of dynamic plugin types.
  *
- * Return:      Success:    Positive if any action was taken that might
- *                          affect some other interface; zero otherwise.
- *              Failure:    Negative.
+ *              The plugin_control_mask parameter is a bitfield that controls
+ *              whether certain classes of plugins (e.g.: filters,
+ *              VOL drivers) will be loaded by the library.
  *
- * Programmer:  Raymond Lu
- *              20 February 2013
+ *              plugin bit = 0, will prevent the use of that dynamic plugin type.
+ *              plugin bit = 1, will allow the use of that dynamic plugin type.
  *
- *-------------------------------------------------------------------------
- */
-int
-H5PL_term_package(void)
-{
-    int  n = 0;
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    if(H5_PKG_INIT_VAR) {
-        size_t u;       /* Local index variable */
-
-        /* Close opened dynamic libraries */
-        if(H5PL_table_g) {
-            for(u = 0; u < H5PL_table_used_g; u++)
-                H5PL__close((H5PL_table_g[u]).handle);
-
-            /* Free the table of dynamic libraries */
-            H5PL_table_g = (H5PL_table_t *)H5MM_xfree(H5PL_table_g);
-            H5PL_table_used_g = H5PL_table_alloc_g = 0;
-
-            n++;
-        } /* end if */
-
-        /* Free the table of search paths */
-        if(H5PL_num_paths_g > 0) {
-            for(u = 0; u < H5PL_num_paths_g; u++)
-                if(H5PL_path_table_g[u])
-                    H5PL_path_table_g[u] = (char *)H5MM_xfree(H5PL_path_table_g[u]);
-            H5PL_num_paths_g = 0;
-            H5PL_path_found_g = FALSE;
-
-            n++;
-        } /* end if */
-
-        /* Mark the interface as uninitialized */
-        if(0 == n)
-            H5_PKG_INIT_VAR = FALSE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(n)
-} /* end H5PL_term_package() */
-
-
-/*-------------------------------------------------------------------------
- * Function: H5PLset_loading_state
- *
- * Purpose: Control the loading of dynamic plugin types.
- *
- * This function will not allow plugin types if the pathname from the HDF5_PLUGIN_PRELOAD
- * environment variable is set to the special "::" string.
+ *              A list of pre-defined masks can be found in H5PLpublic.h.
+ *              Set the mask to 0 to disable all plugins.
  *
- * plugin bit = 0, will prevent the use of that dynamic plugin type.
- * plugin bit = 1, will allow the use of that dynamic plugin type.
+ *              This function will not allow plugin types if the pathname
+ *              from the HDF5_PLUGIN_PRELOAD environment variable is set to
+ *              the special "::" string.
  *
- * H5PL_TYPE_FILTER changes just dynamic filters
- * A H5PL_ALL_PLUGIN will enable all dynamic plugin types
- * A zero value will disable all dynamic plugin types
- *
- * Return: Non-negative or success
+ * Return:      Success:    Non-negative
+ *              Failture:   Negative
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PLset_loading_state(unsigned int plugin_type)
+H5PLset_loading_state(unsigned int plugin_control_mask)
 {
-    char *preload_path;
-    herr_t ret_value = SUCCEED; /* Return value */
+    herr_t  ret_value = SUCCEED;        /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    H5TRACE1("e", "Iu", plugin_type);
-
-    /* change the bit value of the requested plugin type(s) */
-    H5PL_plugin_g = plugin_type;
+    H5TRACE1("e", "Iu", plugin_control_mask);
 
-    /* check if special ENV variable is set and disable all plugin types */
-    if(NULL != (preload_path = HDgetenv("HDF5_PLUGIN_PRELOAD")))
-        /* Special symbol "::" means no plugin during data reading. */
-        if(!HDstrcmp(preload_path, H5PL_NO_PLUGIN))
-            H5PL_plugin_g = 0;
+    /* Set the plugin control mask */
+    if(H5PL__set_plugin_control_mask(plugin_control_mask) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_CANTSET, FAIL, "error setting plugin control mask")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -309,27 +98,35 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function: H5PLget_loading_state
+ * Function:    H5PLget_loading_state
  *
- * Purpose: Query state of the loading of dynamic plugin types.
+ * Purpose:     Get the bitmask that controls whether certain classes
+ *              of plugins (e.g.: filters, VOL drivers) will be loaded
+ *              by the library.
  *
- * This function will return the state of the global flag.
+ *              Zero if all plugin types are disabled
+ *              Negative if all plugin types are enabled
+ *              Positive if one or more of the plugin types are enabled
  *
- * Return: Zero if all plugin types are disabled, negative if all
- * plugin types are enabled, positive if one or more of the plugin types are enabled.
+ * Return:      Success:    Non-negative
+ *              Failture:   Negative
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PLget_loading_state(unsigned int *plugin_type)
+H5PLget_loading_state(unsigned int *plugin_control_mask)
 {
-    herr_t ret_value = SUCCEED; /* Return value */
+    herr_t ret_value = SUCCEED;     /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    H5TRACE1("e", "*Iu", plugin_type);
+    H5TRACE1("e", "*Iu", plugin_control_mask);
+
+    if (NULL == plugin_control_mask)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_control_mask parameter cannot be NULL")
 
-    if(plugin_type)
-        *plugin_type = H5PL_plugin_g;
+    /* Set the plugin control mask */
+    if(H5PL__get_plugin_control_mask(plugin_control_mask) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_CANTGET, FAIL, "error getting plugin control mask")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -337,660 +134,282 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5PL_load
+ * Function:    H5PLappend
  *
- * Purpose:     Given the plugin type and identifier, this function searches
- *              and/or loads a dynamic plugin library first among the already
- *              opened libraries then in the designated location paths.
+ * Purpose:     Insert a plugin search path at the end of the list.
  *
- * Return:      Non-NULL on success/NULL on failure
- *
- * Programmer:  Raymond Lu
- *              13 February 2013
- *
- *-------------------------------------------------------------------------
- */
-const void *
-H5PL_load(H5PL_type_t type, int id)
-{
-    htri_t      found;               /* Whether the plugin was found */
-    const void  *plugin_info = NULL;
-    const void  *ret_value = NULL;
-
-    FUNC_ENTER_NOAPI(NULL)
-
-    switch(type) {
-        case H5PL_TYPE_FILTER:
-            if((H5PL_plugin_g & H5PL_FILTER_PLUGIN) == 0)
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "required dynamically loaded plugin filter '%d' is not available", id)
-            break;
-
-        case H5PL_TYPE_ERROR:
-        case H5PL_TYPE_NONE:
-        default:
-            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "required dynamically loaded plugin '%d' is not valid", id)
-    } /* end switch */
-
-    /* Initialize the location paths for dynamic libraries, if they aren't
-     * already set up.
-     */
-    if(FALSE == H5PL_path_found_g)
-        if(H5PL__init_path_table() < 0)
-            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINIT, NULL, "can't initialize search path table")
-
-    /* Search in the table of already loaded plugin libraries */
-    if((found = H5PL__search_table(type, id, &plugin_info)) < 0)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, NULL, "search in table failed")
-
-    /* If not found, iterate through the path table to find the right dynamic library */
-    if(!found) {
-        size_t       i;                   /* Local index variable */
-
-        for(i = 0; i < H5PL_num_paths_g; i++) {
-            if((found = H5PL__find(type, id, H5PL_path_table_g[i], &plugin_info)) < 0)
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, NULL, "search in paths failed")
-
-            /* Break out if found */
-            if(found) {
-                HDassert(plugin_info);
-                break;
-            } /* end if */
-        } /* end for */
-    } /* end if */
-
-    /* Check if we found the plugin */
-    if(found)
-        ret_value = plugin_info;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5PL_load() */
-
-
-/*-------------------------------------------------------------------------
- * Function: H5PLappend
- *
- * Purpose: Insert a plugin path at the end of the list.
- *
- * Return: Non-negative or success.
+ * Return:      Success:    Non-negative
+ *              Failture:   Negative
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PLappend(const char* plugin_path)
+H5PLappend(const char *search_path)
 {
     herr_t ret_value = SUCCEED; /* Return value */
-    char        *dl_path = NULL;
 
     FUNC_ENTER_API(FAIL)
-    if(H5PL_num_paths_g == H5PL_MAX_PATH_NUM)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "too many directories in path for table")
-    if(NULL == plugin_path)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided")
-    if(NULL == (dl_path = H5MM_strdup(plugin_path)))
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
+    H5TRACE1("e", "*s", search_path);
 
-    H5PL_EXPAND_ENV_VAR
+    /* Check args */
+    if (NULL == search_path)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot be NULL")
+    if (0 == HDstrlen(search_path))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot have length zero")
 
-    H5PL_path_table_g[H5PL_num_paths_g] = dl_path;
-    H5PL_num_paths_g++;
+    /* Append the search path to the path table */
+    if (H5PL__append_path(search_path) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTAPPEND, FAIL, "unable to append search path")
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5PLappend() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function: H5PLprepend
+ * Function:    H5PLprepend
  *
- * Purpose: Insert a plugin path at the beginning of the list.
+ * Purpose:     Insert a plugin search path at the beginning of the list.
  *
- * Return: Non-negative or success.
+ * Return:      Success:    Non-negative
+ *              Failture:   Negative
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PLprepend(const char* plugin_path)
+H5PLprepend(const char *search_path)
 {
     herr_t ret_value = SUCCEED; /* Return value */
-    char        *dl_path = NULL;
-    unsigned int plindex;
 
     FUNC_ENTER_API(FAIL)
-    if(H5PL_num_paths_g == H5PL_MAX_PATH_NUM)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "too many directories in path for table")
-    if(NULL == plugin_path)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided")
-    if(NULL == (dl_path = H5MM_strdup(plugin_path)))
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
+    H5TRACE1("e", "*s", search_path);
 
-    H5PL_EXPAND_ENV_VAR
+    /* Check args */
+    if (NULL == search_path)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot be NULL")
+    if (0 == HDstrlen(search_path))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot have length zero")
 
-    for (plindex = (unsigned int)H5PL_num_paths_g; plindex > 0; plindex--)
-        H5PL_path_table_g[plindex] = H5PL_path_table_g[plindex - 1];
-    H5PL_path_table_g[0] = dl_path;
-    H5PL_num_paths_g++;
+    /* Prepend the search path to the path table */
+    if (H5PL__prepend_path(search_path) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to prepend search path")
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5PLprepend() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function: H5PLreplace
+ * Function:    H5PLreplace
  *
- * Purpose: Replace the path at the specified index.
+ * Purpose:     Replace the path at the specified index. The path at the
+ *              index must exist.
  *
- * Return: Non-negative or success.
+ * Return:      Non-negative or success.
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PLreplace(const char* plugin_path, unsigned int index)
+H5PLreplace(const char *search_path, unsigned int index)
 {
-    herr_t ret_value = SUCCEED; /* Return value */
-    char        *dl_path = NULL;
+    unsigned    num_paths;              /* Current number of stored paths */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    if(NULL == plugin_path)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided")
-    if(index >= H5PL_MAX_PATH_NUM)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "index path out of bounds for table")
-    if(NULL == (dl_path = H5MM_strdup(plugin_path)))
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
+    H5TRACE2("e", "*sIu", search_path, index);
 
-    H5PL_EXPAND_ENV_VAR
+    /* Check args */
+    if (NULL == search_path)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot be NULL")
+    if (0 == HDstrlen(search_path))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot have length zero")
 
-    if(H5PL_path_table_g[index])
-        H5PL_path_table_g[index] = (char *)H5MM_xfree(H5PL_path_table_g[index]);
-    H5PL_path_table_g[index] = dl_path;
+    /* Check index */
+    num_paths = H5PL__get_num_paths();
+    if (0 == num_paths)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "path table is empty")
+    else if (index >= num_paths)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "index path out of bounds for table - can't be more than %u", (num_paths - 1))
+
+    /* Insert the search path into the path table */
+    if (H5PL__replace_path(search_path, index) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to replace search path")
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5PLreplace() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function: H5PLinsert
+ * Function:    H5PLinsert
  *
- * Purpose: Insert a plugin path at the specified index, moving other paths after the index.
+ * Purpose:     Insert a plugin search path at the specified index, moving
+ *              other paths after the index.
  *
- * Return: Non-negative or success.
+ * Return:      Success:    Non-negative
+ *              Failture:   Negative
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5PLinsert(const char* plugin_path, unsigned int index)
+H5PLinsert(const char *search_path, unsigned int index)
 {
-    herr_t ret_value = SUCCEED; /* Return value */
-    char        *dl_path = NULL;
-    unsigned int plindex;
+    unsigned    num_paths;              /* Current number of stored paths */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    if(H5PL_num_paths_g == H5PL_MAX_PATH_NUM)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "too many directories in path for table")
-    if(NULL == plugin_path)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no path provided")
-    if(index >= H5PL_MAX_PATH_NUM)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "index path out of bounds for table")
-    if(NULL == (dl_path = H5MM_strdup(plugin_path)))
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
-
-    H5PL_EXPAND_ENV_VAR
-
-    for(plindex = (unsigned int)H5PL_num_paths_g; plindex > index; plindex--)
-        H5PL_path_table_g[plindex] = H5PL_path_table_g[plindex - 1];
-    H5PL_path_table_g[index] = dl_path;
-    H5PL_num_paths_g++;
+    H5TRACE2("e", "*sIu", search_path, index);
+
+    /* Check args */
+    if (NULL == search_path)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot be NULL")
+    if (0 == HDstrlen(search_path))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "plugin_path parameter cannot have length zero")
+
+    /* Check index */
+    num_paths = H5PL__get_num_paths();
+    if ((0 != num_paths) && (index >= num_paths))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "index path out of bounds for table - can't be more than %u", (num_paths - 1))
+
+    /* Insert the search path into the path table */
+    if (H5PL__insert_path(search_path, index) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to insert search path")
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5PLinsert() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function: H5PLremove
+ * Function:    H5PLremove
  *
- * Purpose: Remove the plugin path at the specifed index and compacting the list.
+ * Purpose:     Remove the plugin path at the specifed index and compact
+ *              the list.
  *
- * Return: Non-negative or success.
+ * Return:      Success:    Non-negative
+ *              Failture:   Negative
+ *
+ * Return:      Non-negative or success.
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5PLremove(unsigned int index)
 {
-    herr_t ret_value = SUCCEED; /* Return value */
-    unsigned int plindex;
+    unsigned    num_paths;              /* Current number of stored paths */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    if(H5PL_num_paths_g == 0)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "no directories in table")
-    if(index >= H5PL_MAX_PATH_NUM)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "index path out of bounds for table")
-    if(NULL == H5PL_path_table_g[index])
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no directory path at index")
-    H5PL_path_table_g[index] = (char *)H5MM_xfree(H5PL_path_table_g[index]);
-
-    H5PL_num_paths_g--;
-    for(plindex = index; plindex < (unsigned int)H5PL_num_paths_g; plindex++)
-        H5PL_path_table_g[plindex] = H5PL_path_table_g[plindex + 1];
-    H5PL_path_table_g[H5PL_num_paths_g] = NULL;
+    H5TRACE1("e", "Iu", index);
+
+    /* Check index */
+    num_paths = H5PL__get_num_paths();
+    if (0 == num_paths)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "path table is empty")
+    else if (index >= num_paths)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "index path out of bounds for table - can't be more than %u", (num_paths - 1))
+
+    /* Delete the search path from the path table */
+    if (H5PL__remove_path(index) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTDELETE, FAIL, "unable to remove search path")
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5PLremove() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function: H5PLget
+ * Function:    H5PLget
+ *
+ * Purpose:     Query the plugin path at a specified index.
  *
- * Purpose: Query the plugin path at the specified index.
+ *  If 'path_buf' is non-NULL then up to 'buf_size' bytes will be written into
+ *  that buffer and the length of the path name will be returned.
  *
- * Return: Success: The length of path.
+ *  If 'path_buf' is NULL, this function will simply return the number of
+ *  characters required to store the path name, ignoring 'path_buf' and
+ *  'buf_size'
  *
- *  If `pathname' is non-NULL then write up to `size' bytes into that
- *  buffer and always return the length of the pathname.
- *  Otherwise `size' is ignored and the function does not store the pathname,
- *  just returning the number of characters required to store the pathname.
- *  If an error occurs then the buffer pointed to by `pathname' (NULL or non-NULL)
- *  is unchanged and the function returns a negative value.
- *  If a zero is returned for the name's length, then there is no pathname
- *  associated with the index.
+ *  If an error occurs then the buffer pointed to by 'path_buf'
+ *  (NULL or non-NULL) will be unchanged and the function will return a
+ *  negative value.
+ *
+ *  If a zero is returned for the name's length, then there is no path name
+ *  associated with the index and the 'path_buf' buffer will be unchanged.
+ *
+ * Return:  Success:    The length of path
+ *          Failure:    A negative value
  *
  *-------------------------------------------------------------------------
  */
 ssize_t
-H5PLget(unsigned int index, char *pathname/*out*/, size_t size)
+H5PLget(unsigned int index, char *path_buf, size_t buf_size)
 {
-    ssize_t      ret_value = 0;    /* Return value */
-    ssize_t      len = 0;      /* Length of pathname */
-    char        *dl_path = NULL;
+    unsigned    num_paths;              /* Current number of stored paths */
+    const char *path = NULL;            /* path from table */
+    size_t      path_len = 0;           /* Length of path */
+    ssize_t     ret_value = 0;          /* Return value */
 
     FUNC_ENTER_API(FAIL)
-    if(H5PL_num_paths_g == 0)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "no directories in table")
-    if(index >= H5PL_MAX_PATH_NUM)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "index path out of bounds for table")
-    if(NULL == (dl_path = H5PL_path_table_g[index]))
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "no directory path at index")
-    len = HDstrlen(dl_path);
-    if(pathname) {
-        HDstrncpy(pathname, dl_path, MIN((size_t)(len + 1), size));
-        if((size_t)len >= size)
-            pathname[size - 1] = '\0';
+    H5TRACE3("Zs", "Iu*sz", index, path_buf, buf_size);
+
+    /* Check index */
+    num_paths = H5PL__get_num_paths();
+    if (0 == num_paths)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "path table is empty")
+    else if (index >= num_paths)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "index path out of bounds for table - can't be more than %u", (num_paths - 1))
+
+    /* Check if the search table is empty */
+    if (H5PL__get_num_paths() == 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, (-1), "plugin search path table is empty")
+
+    /* Get the path at the specified index and its length */
+    if (NULL == (path = H5PL__get_path(index)))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_BADVALUE, (-1), "no path stored at that index")
+    path_len = HDstrlen(path);
+
+    /* If the path buffer is not NULL, copy the path to the buffer */
+    if (path_buf) {
+        HDstrncpy(path_buf, path, MIN((size_t)(path_len + 1), buf_size));
+        if ((size_t)path_len >= buf_size)
+            path_buf[buf_size - 1] = '\0';
     } /* end if */
 
     /* Set return value */
-    ret_value = len;
+    ret_value = (ssize_t)path_len;
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5PLget() */
 
-
-/*-------------------------------------------------------------------------
- * Function: H5PLsize
- *
- * Purpose: Query the size of the current list of plugin paths.
- *
- * Return: Non-negative or success.
- *
- *-------------------------------------------------------------------------
- */
-unsigned int
-H5PLsize(void)
-{
-    return (unsigned int)H5PL_num_paths_g;
-} /* end H5PLsize() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5PL__init_path_table
- *
- * Purpose:     Initialize the path table.
- *
- * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Quincey Koziol
- *              18 March 2013
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5PL__init_path_table(void)
-{
-    char        *dl_path = NULL;
-    char        *origin_dl_path;
-    char        *dir;
-    herr_t      ret_value = SUCCEED;    /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Retrieve paths from HDF5_PLUGIN_PATH if the user sets it
-     * or from the default paths if it isn't set.
-     */
-    origin_dl_path = HDgetenv("HDF5_PLUGIN_PATH");
-    if(NULL == origin_dl_path)
-        dl_path = H5MM_strdup(H5PL_DEFAULT_PATH);
-    else
-        dl_path = H5MM_strdup(origin_dl_path);
-    if(NULL == dl_path)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
-
-    H5PL_EXPAND_ENV_VAR
-
-    /* Put paths in the path table.  They are separated by ":" */
-    dir = HDstrtok(dl_path, H5PL_PATH_SEPARATOR);
-    while(dir) {
-        /* Check for too many directories in path */
-        if(H5PL_num_paths_g == H5PL_MAX_PATH_NUM)
-            HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "too many directories in path for table")
-        if(NULL == (H5PL_path_table_g[H5PL_num_paths_g] = H5MM_strdup(dir)))
-            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
-        H5PL_num_paths_g++;
-        dir = HDstrtok(NULL, H5PL_PATH_SEPARATOR);
-    } /* end while */
-
-    H5PL_path_found_g = TRUE;
-
-done:
-    if(dl_path)
-        dl_path = (char *)H5MM_xfree(dl_path);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5PL__init_path_table() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5PL__find
- *
- * Purpose:     Given a path, this function opens the directory and envokes
- *              another function to go through all files to find the right
- *              plugin library. Two function definitions are for Unix and
- *              Windows.
- *
- * Return:      TRUE on success,
- *              FALSE on not found,
- *              negative on failure
- *
- * Programmer:  Raymond Lu
- *              13 February 2013
- *
- *-------------------------------------------------------------------------
- */
-#ifndef H5_HAVE_WIN32_API
-static htri_t
-H5PL__find(H5PL_type_t plugin_type, int type_id, char *dir, const void **info)
-{
-    char           *pathname = NULL;
-    DIR            *dirp = NULL;
-    struct dirent  *dp;
-    htri_t         ret_value = FALSE;
-
-    FUNC_ENTER_STATIC
-
-    /* Open the directory */
-    if(!(dirp = HDopendir(dir)))
-        HGOTO_ERROR(H5E_PLUGIN, H5E_OPENERROR, FAIL, "can't open directory: %s", dir)
-
-    /* Iterates through all entries in the directory to find the right plugin library */
-    while(NULL != (dp = HDreaddir(dirp))) {
-        /* The library we are looking for should be called libxxx.so... on Unix
-         * or libxxx.xxx.dylib on Mac.
-         */
-#ifndef __CYGWIN__
-        if(!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
-                (HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name, ".dylib"))) {
-#else
-        if(!HDstrncmp(dp->d_name, "cyg", (size_t)3) &&
-                HDstrstr(dp->d_name, ".dll") ) {
-
-#endif
-            h5_stat_t   my_stat;
-            size_t      pathname_len;
-            htri_t      found_in_dir;
-
-            /* Allocate & initialize the path name */
-            pathname_len = HDstrlen(dir) + HDstrlen(dp->d_name) + 2;
-            if(NULL == (pathname = (char *)H5MM_malloc(pathname_len)))
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
-            HDsnprintf(pathname, pathname_len, "%s/%s", dir, dp->d_name);
-
-            /* Get info for directory entry */
-            if(HDstat(pathname, &my_stat) == -1)
-                HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't stat file: %s", HDstrerror(errno))
-
-            /* If it is a directory, skip it */
-            if(S_ISDIR(my_stat.st_mode))
-                continue;
-
-            /* Attempt to open the dynamic library as a filter library */
-            if((found_in_dir = H5PL__open(plugin_type, pathname, type_id, info)) < 0)
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "search in directory failed")
-            if(found_in_dir)
-                HGOTO_DONE(TRUE)    /* Indicate success */
-            pathname = (char *)H5MM_xfree(pathname);
-        } /* end if */
-    } /* end while */
-
-done:
-    if(dirp)
-        if(HDclosedir(dirp) < 0)
-            HDONE_ERROR(H5E_FILE, H5E_CLOSEERROR, FAIL, "can't close directory: %s", HDstrerror(errno))
-    pathname = (char *)H5MM_xfree(pathname);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5PL__find() */
-#else /* H5_HAVE_WIN32_API */
-static htri_t
-H5PL__find(H5PL_type_t plugin_type, int type_id, char *dir, const void **info)
-{
-    WIN32_FIND_DATAA    fdFile;
-    HANDLE              hFind;
-    char                *pathname = NULL;
-    char                service[2048];
-    htri_t              ret_value = FALSE;
-
-    FUNC_ENTER_STATIC
-
-    /* Specify a file mask. *.* = We want everything! */
-    sprintf(service, "%s\\*.dll", dir);
-    if((hFind = FindFirstFileA(service, &fdFile)) == INVALID_HANDLE_VALUE)
-        HGOTO_ERROR(H5E_PLUGIN, H5E_OPENERROR, FAIL, "can't open directory")
-
-    do {
-        /* Find first file will always return "."
-         * and ".." as the first two directories.
-         */
-        if(HDstrcmp(fdFile.cFileName, ".") != 0 && HDstrcmp(fdFile.cFileName, "..") != 0) {
-            size_t      pathname_len;
-            htri_t      found_in_dir;
-
-            /* Allocate & initialize the path name */
-            pathname_len = HDstrlen(dir) + HDstrlen(fdFile.cFileName) + 2;
-            if(NULL == (pathname = (char *)H5MM_malloc(pathname_len)))
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
-            HDsnprintf(pathname, pathname_len, "%s\\%s", dir, fdFile.cFileName);
-
-            /* Is the entity a File or Folder? */
-            if(fdFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
-                continue;
-
-            if((found_in_dir = H5PL__open(plugin_type, pathname, type_id, info)) < 0)
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "search in directory failed")
-            if(found_in_dir)
-                HGOTO_DONE(TRUE)    /* Indicate success */
-            pathname = (char *)H5MM_xfree(pathname);
-        } /* end if */
-    } while(FindNextFileA(hFind, &fdFile)); /* Find the next file. */
-
-done:
-    if(hFind)
-        FindClose(hFind);
-    if(pathname)
-        pathname = (char *)H5MM_xfree(pathname);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5PL__find() */
-#endif /* H5_HAVE_WIN32_API */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5PL__open
- *
- * Purpose:     Iterates through all files to find the right plugin library.
- *              It loads the dynamic plugin library and keeps it on the list
- *              of loaded libraries.
- *
- * Return:      TRUE on success,
- *              FALSE on not found,
- *              negative on failure
- *
- * Programmer:  Raymond Lu
- *              13 February 2013
- *
- *-------------------------------------------------------------------------
- */
-static htri_t
-H5PL__open(H5PL_type_t pl_type, char *libname, int pl_id, const void **pl_info)
-{
-    H5PL_HANDLE    handle = NULL;
-    htri_t         ret_value = FALSE;
-
-    FUNC_ENTER_STATIC
-
-    /* There are different reasons why a library can't be open, e.g. wrong architecture.
-     * simply continue if we can't open it.
-     */
-    if(NULL == (handle = H5PL_OPEN_DLIB(libname))) {
-        H5PL_CLR_ERROR; /* clear error */
-    } /* end if */
-    else {
-        H5PL_get_plugin_info_t get_plugin_info = NULL;
-
-        /* Return a handle for the function H5PLget_plugin_info in the dynamic library.
-         * The plugin library is suppose to define this function.
-         */
-        if(NULL == (get_plugin_info = (H5PL_get_plugin_info_t)H5PL_GET_LIB_FUNC(handle, "H5PLget_plugin_info"))) {
-            if(H5PL__close(handle) < 0)
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CLOSEERROR, FAIL, "can't close dynamic library")
-        } /* end if */
-        else {
-            const H5Z_class2_t *plugin_info;
-
-            /* Invoke H5PLget_plugin_info to verify this is the right library we are looking for.
-             * Move on if it isn't.
-             */
-            if(NULL == (plugin_info = (const H5Z_class2_t *)(*get_plugin_info)())) {
-                if(H5PL__close(handle) < 0)
-                    HGOTO_ERROR(H5E_PLUGIN, H5E_CLOSEERROR, FAIL, "can't close dynamic library")
-                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "can't get plugin info")
-            } /* end if */
-
-            /* Successfully found plugin library, check if it's the right one */
-            if(plugin_info->id == pl_id) {
-                /* Expand the table if it is too small */
-                if(H5PL_table_used_g >= H5PL_table_alloc_g) {
-                    size_t n = MAX(H5Z_MAX_NFILTERS, 2 * H5PL_table_alloc_g);
-                    H5PL_table_t *table = (H5PL_table_t *)H5MM_realloc(H5PL_table_g, n * sizeof(H5PL_table_t));
-
-                    if(!table)
-                        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTALLOC, FAIL, "unable to extend dynamic library table")
-
-                    H5PL_table_g = table;
-                    H5PL_table_alloc_g = n;
-                } /* end if */
-
-                (H5PL_table_g[H5PL_table_used_g]).handle = handle;
-                (H5PL_table_g[H5PL_table_used_g]).pl_type = pl_type;
-                (H5PL_table_g[H5PL_table_used_g]).pl_id = plugin_info->id;
-                H5PL_table_used_g++;
-
-                /* Set the plugin info to return */
-                *pl_info = (const void *)plugin_info;
-
-                /* Indicate success */
-                ret_value = TRUE;
-            } /* end if */
-            else
-                if(H5PL__close(handle) < 0)
-                    HGOTO_ERROR(H5E_PLUGIN, H5E_CLOSEERROR, FAIL, "can't close dynamic library")
-        } /* end if */
-    } /* end else */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5PL__open() */
-
 
 /*-------------------------------------------------------------------------
- * Function:    H5PL__search_table
- *
- * Purpose:     Search in the list of already opened dynamic libraries
- *              to see if the one we are looking for is already opened.
+ * Function:    H5PLsize
  *
- * Return:      TRUE on success,
- *              FALSE on not found,
- *              Negative on failure
+ * Purpose:     Get the number of stored plugin paths.
+ *              XXX: This is a terrible name. Can it be changed?
  *
- * Programmer:  Raymond Lu
- *              13 February 2013
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
-static htri_t
-H5PL__search_table(H5PL_type_t plugin_type, int type_id, const void **info)
+herr_t
+H5PLsize(unsigned int *num_paths)
 {
-    htri_t         ret_value = FALSE;
-
-    FUNC_ENTER_STATIC
-
-    /* Search in the table of already opened dynamic libraries */
-    if(H5PL_table_used_g > 0) {
-        size_t         i;
+    herr_t ret_value = SUCCEED; /* Return value */
 
-        for(i = 0; i < H5PL_table_used_g; i++) {
-            if((plugin_type == (H5PL_table_g[i]).pl_type) && (type_id == (H5PL_table_g[i]).pl_id)) {
-                H5PL_get_plugin_info_t get_plugin_info;
-                const H5Z_class2_t   *plugin_info;
+    FUNC_ENTER_API(FAIL)
+    H5TRACE1("e", "*Iu", num_paths);
 
-                if(NULL == (get_plugin_info = (H5PL_get_plugin_info_t)H5PL_GET_LIB_FUNC((H5PL_table_g[i]).handle, "H5PLget_plugin_info")))
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't get function for H5PLget_plugin_info")
+    /* Check arguments */
+    if (!num_paths)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "num_paths parameter cannot be NULL")
 
-                if(NULL == (plugin_info = (const H5Z_class2_t *)(*get_plugin_info)()))
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't get plugin info")
-
-                *info = plugin_info;
-                HGOTO_DONE(TRUE)
-            } /* end if */
-        } /* end for */
-    } /* end if */
+    /* Get the number of stored plugin paths */
+    *num_paths = H5PL__get_num_paths();
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5PL__search_table() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5PL__close
- *
- * Purpose:     Closes the handle for dynamic library
- *
- * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Raymond Lu
- *              13 February 2013
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-H5PL__close(H5PL_HANDLE handle)
-{
-    FUNC_ENTER_STATIC_NOERR
-
-    H5PL_CLOSE_LIB(handle);
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5PL__close() */
+    FUNC_LEAVE_API(ret_value)
+} /* end H5PLsize() */
 
diff --git a/src/H5PLextern.h b/src/H5PLextern.h
index 3264435..cd5464d 100644
--- a/src/H5PLextern.h
+++ b/src/H5PLextern.h
@@ -4,18 +4,16 @@
  *                                                                           *
  * This file is part of HDF5. The full HDF5 copyright notice, including      *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic document set and is     *
- * linked from the top-level documents page.  It can also be found at        *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access   *
- * to either file, you may request a copy from help@hdfgroup.org.            *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
- * Programmer:  Raymond Lu <songyulu@hdfgroup.org>
- *              13 February 2013
+ * Purpose:     Header file for writing external HDF5 plugins.
  */
+
 #ifndef _H5PLextern_H
 #define _H5PLextern_H
 
diff --git a/src/H5PLint.c b/src/H5PLint.c
new file mode 100644
index 0000000..b190746
--- /dev/null
+++ b/src/H5PLint.c
@@ -0,0 +1,394 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose: Internal routines for managing plugins.
+ *
+ */
+
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5PLmodule.h"          /* This source code file is part of the H5PL module */
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"      /* Generic Functions            */
+#include "H5Eprivate.h"     /* Error handling               */
+#include "H5MMprivate.h"    /* Memory management            */
+#include "H5PLpkg.h"        /* Plugin                       */
+#include "H5Zprivate.h"     /* Filter pipeline              */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Package initialization variable */
+hbool_t H5_PKG_INIT_VAR = FALSE;
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Bitmask that controls whether classes of plugins
+ * (e.g.: filters, VOL drivers) can be loaded.
+ */
+static unsigned int     H5PL_plugin_control_mask_g = H5PL_ALL_PLUGIN;
+
+/* This flag will be set to FALSE if the HDF5_PLUGIN_PRELOAD
+ * environment variable was set to H5PL_NO_PLUGIN at
+ * package initialization.
+ */
+static hbool_t          H5PL_allow_plugins_g = TRUE;
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__get_plugin_control_mask
+ *
+ * Purpose:     Gets the internal plugin control mask value.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__get_plugin_control_mask(unsigned int *mask /*out*/)
+{
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE_NOERR
+
+    /* Check args - Just assert on package functions */
+    HDassert(mask);
+
+    /* Return the mask */
+    *mask = H5PL_plugin_control_mask_g;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+
+} /* end H5PL__get_plugin_control_mask() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__set_plugin_control_mask
+ *
+ * Purpose:     Sets the internal plugin control mask value.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__set_plugin_control_mask(unsigned int mask)
+{
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE_NOERR
+
+    /* Only allow setting this if plugins have not been disabled.
+     * XXX: Note that we don't consider this an error, but instead
+     *      silently ignore it. We may want to consider this behavior
+     *      more carefully.
+     */
+    if (H5PL_allow_plugins_g)
+        H5PL_plugin_control_mask_g = mask;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+
+} /* end H5PL__set_plugin_control_mask() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__init_package
+ *
+ * Purpose:     Initialize any package-specific data and call any init
+ *              routines for the package.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__init_package(void)
+{
+    char        *env_var = NULL;
+    herr_t      ret_value = SUCCEED;
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check the environment variable to determine if the user wants
+     * to ignore plugins. The special symbol H5PL_NO_PLUGIN (defined in
+     * H5PLpublic.h) means we don't want to load plugins.
+     */
+    if (NULL != (env_var = HDgetenv("HDF5_PLUGIN_PRELOAD")))
+        if (!HDstrcmp(env_var, H5PL_NO_PLUGIN)) {
+            H5PL_plugin_control_mask_g = 0;
+            H5PL_allow_plugins_g = FALSE;
+        }
+
+    /* Create the table of previously-loaded plugins */
+    if (H5PL__create_plugin_cache() < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINIT, FAIL, "can't create plugin cache")
+
+    /* Create the table of search paths for dynamic libraries */
+    if (H5PL__create_path_table() < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINIT, FAIL, "can't create plugin search path table")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__init_package() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL_term_package
+ *
+ * Purpose:     Terminate the H5PL interface: release all memory, reset all
+ *              global variables to initial values. This only happens if all
+ *              types have been destroyed from other interfaces.
+ *
+ * Return:      Success:    Positive if any action was taken that might
+ *                          affect some other interface; zero otherwise
+ *              Failure:    Negative
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+H5PL_term_package(void)
+{
+    hbool_t already_closed = FALSE;
+    int     ret_value = 0;
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    if (H5_PKG_INIT_VAR) {
+
+        /* Close the plugin cache.
+         * We need to bump the return value if we did any real work here.
+         */
+        if (H5PL__close_plugin_cache(&already_closed) < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTFREE, (-1), "problem closing plugin cache")
+        if (!already_closed)
+            ret_value++;
+
+        /* Close the search path table and free the paths */
+        if (H5PL__close_path_table() < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTFREE, (-1), "problem closing search path table")
+
+        /* Mark the interface as uninitialized */
+        if (0 == ret_value)
+            H5_PKG_INIT_VAR = FALSE;
+    } /* end if */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL_term_package() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL_load
+ *
+ * Purpose:     Given the plugin type and identifier, this function searches
+ *              for and, if found, loads a dynamic plugin library.
+ *
+ *              The function searches first in the cached plugins and then
+ *              in the paths listed in the path table.
+ *
+ * Return:      Success:    A pointer to the plugin info
+ *              Failure:    NULL
+ *
+ *-------------------------------------------------------------------------
+ */
+const void *
+H5PL_load(H5PL_type_t type, H5PL_key_t key)
+{
+    H5PL_search_params_t    search_params;          /* Plugin search parameters     */
+    hbool_t                 found = FALSE;          /* Whether the plugin was found */
+    const void             *plugin_info = NULL;     /* Information from the plugin  */
+    const void             *ret_value = NULL;
+
+    FUNC_ENTER_NOAPI(NULL)
+
+    /* Check if plugins can be loaded for this plugin type */
+    switch (type) {
+        case H5PL_TYPE_FILTER:
+            if ((H5PL_plugin_control_mask_g & H5PL_FILTER_PLUGIN) == 0)
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "filter plugins disabled")
+            break;
+        case H5PL_TYPE_ERROR:
+        case H5PL_TYPE_NONE:
+        default:
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTLOAD, NULL, "Invalid plugin type specified")
+    }
+
+    /* Set up the search parameters */
+    search_params.type = type;
+    search_params.key.id = key.id;
+
+    /* Search in the table of already loaded plugin libraries */
+    if(H5PL__find_plugin_in_cache(&search_params, &found, &plugin_info) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, NULL, "search in plugin cache  failed")
+
+    /* If not found, try iterating through the path table to find an appropriate plugin */
+    if (!found)
+        if (H5PL__find_plugin_in_path_table(&search_params, &found, &plugin_info) < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, NULL, "search in path table failed")
+
+    /* Set the return value we found the plugin */
+    if (found)
+        ret_value = plugin_info;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL_load() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__open
+ *
+ * Purpose:     Opens a plugin.
+ *
+ *              The success parameter will be set to TRUE and the plugin_info
+ *              parameter will be filled in on success. Otherwise, they
+ *              will be FALSE and NULL, respectively.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+/* NOTE: We turn off -Wpedantic in gcc to quiet a warning about converting
+ *       object pointers to function pointers, which is undefined in ANSI C.
+ *       This is basically unavoidable due to the nature of dlsym() and *is*
+ *       defined in POSIX, so it's fine.
+ *
+ *       This pragma only needs to surround the assignment of the
+ *       get_plugin_info function pointer, but early (4.4.7, at least) gcc
+ *       only allows diagnostic pragmas to be toggled outside of functions.
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
+herr_t
+H5PL__open(const char *path, H5PL_type_t type, H5PL_key_t key, hbool_t *success, const void **plugin_info)
+{
+    H5PL_HANDLE             handle = NULL;
+    H5PL_get_plugin_info_t  get_plugin_info = NULL;
+    herr_t                  ret_value = SUCCEED;
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(path);
+    HDassert(success);
+    HDassert(plugin_info);
+
+    /* Initialize out parameters */
+    *success = FALSE;
+    *plugin_info = NULL;
+
+    /* There are different reasons why a library can't be open, e.g. wrong architecture.
+     * If we can't open the library, just return.
+     */
+    if (NULL == (handle = H5PL_OPEN_DLIB(path))) {
+        H5PL_CLR_ERROR; /* clear error */
+        HGOTO_DONE(SUCCEED)
+    }
+
+    /* Return a handle for the function H5PLget_plugin_info in the dynamic library.
+     * The plugin library is suppose to define this function.
+     */
+    if (NULL == (get_plugin_info = (H5PL_get_plugin_info_t)H5PL_GET_LIB_FUNC(handle, "H5PLget_plugin_info")))
+        HGOTO_DONE(SUCCEED)
+
+    /* Get the plugin information */
+    switch (type) {
+        case H5PL_TYPE_FILTER:
+        {
+            const H5Z_class2_t *filter_info;
+
+            /* Get the plugin info */
+            if (NULL == (filter_info = (const H5Z_class2_t *)(*get_plugin_info)()))
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "can't get filter info from plugin")
+
+            /* If the filter IDs match, we're done. Set the output parameters. */
+            if (filter_info->id == key.id) {
+                *plugin_info = (const void *)filter_info;
+                *success = TRUE;
+            }
+
+            break;
+        }
+        case H5PL_TYPE_ERROR:
+        case H5PL_TYPE_NONE:
+        default:
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "Invalid plugin type specified")
+    } /* end switch */
+
+    /* If we found the correct plugin, store it in the cache */
+    if (*success)
+        if (H5PL__add_plugin(type, key, handle))
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to add new plugin to plugin cache")
+
+done:
+    if (!(*success) && handle)
+        if (H5PL__close(handle) < 0)
+            HDONE_ERROR(H5E_PLUGIN, H5E_CLOSEERROR, FAIL, "can't close dynamic library")
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__open() */
+#pragma GCC diagnostic pop
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__close
+ *
+ * Purpose:     Closes the handle for dynamic library
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__close(H5PL_HANDLE handle)
+{
+    FUNC_ENTER_PACKAGE_NOERR
+
+    H5PL_CLOSE_LIB(handle);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5PL__close() */
+
diff --git a/src/H5PLmodule.h b/src/H5PLmodule.h
index 0339737..945441e 100644
--- a/src/H5PLmodule.h
+++ b/src/H5PLmodule.h
@@ -4,22 +4,18 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		Saturday, September 12, 2015
- *
- * Purpose:	This file contains declarations which define macros for the
- *		H5PL package.  Including this header means that the source file
- *		is part of the H5PL package.
+ * Purpose: This file contains declarations which define macros for the
+ *          H5PL package.  Including this header means that the source file
+ *          is part of the H5PL package.
  */
+
 #ifndef _H5PLmodule_H
 #define _H5PLmodule_H
 
diff --git a/src/H5PLpath.c b/src/H5PLpath.c
new file mode 100644
index 0000000..972f1d0
--- /dev/null
+++ b/src/H5PLpath.c
@@ -0,0 +1,776 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose: Code to implement a path table which stores plugin search paths.
+ *
+ *          The path table is implemented as a dynamic, global array which
+ *          will grow as new paths are inserted. The capacity of the path
+ *          table never shrinks (though given the low number of paths
+ *          expected and the low likelihood of paths being removed, this
+ *          seems unlikely to be a problem). Inserts and removals rework
+ *          the array so that there are no 'holes' in the in-use part
+ *          of the array.
+ *
+ *          Note that it's basically up to the user to manage the indexes
+ *          when a complicated series of insert, overwrite, and, remove
+ *          operations take place.
+ */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5PLmodule.h"          /* This source code file is part of the H5PL module */
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"      /* Generic Functions            */
+#include "H5Eprivate.h"     /* Error handling               */
+#include "H5MMprivate.h"    /* Memory management            */
+#include "H5PLpkg.h"        /* Plugin                       */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+/* Initial capacity of the path table */
+#define H5PL_INITIAL_PATH_CAPACITY      16
+
+/* The amount to add to the capacity when the table is full */
+#define H5PL_PATH_CAPACITY_ADD          16
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static herr_t H5PL__insert_at(const char *path, unsigned int index);
+static herr_t H5PL__make_space_at(unsigned int index);
+static herr_t H5PL__replace_at(const char *path, unsigned int index);
+static herr_t H5PL__expand_path_table(void);
+static herr_t H5PL__find_plugin_in_path(const H5PL_search_params_t *search_params, hbool_t *found, const char *dir, const void **plugin_info);
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Stored plugin paths to search */
+static char       **H5PL_paths_g = NULL;
+
+/* The number of stored paths */
+static unsigned     H5PL_num_paths_g = 0;
+
+/* The capacity of the path table */
+static unsigned     H5PL_path_capacity_g = H5PL_INITIAL_PATH_CAPACITY;
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__insert_at()
+ *
+ * Purpose:     Insert a path at a particular index in the path table.
+ *              Does not clobber! Will move existing paths up to make
+ *              room. Use H5PL__replace_at(index) if you want to clobber.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5PL__insert_at(const char *path, unsigned int index)
+{
+    char    *path_copy = NULL;      /* copy of path string (for storing) */
+    herr_t  ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check args - Just assert on package functions */
+    HDassert(path);
+    HDassert(HDstrlen(path));
+
+    /* Expand the table if it is full */
+    if (H5PL_num_paths_g == H5PL_path_capacity_g)
+        if (H5PL__expand_path_table() < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't expand path table")
+
+    /* Copy the path for storage so the caller can dispose of theirs */
+    if (NULL == (path_copy = H5MM_strdup(path)))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't make internal copy of path")
+
+#ifdef H5_HAVE_WIN32_API
+    /* Clean up Microsoft Windows environment variables in the path string */
+    if(H5_expand_windows_env_vars(&path_copy))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTCONVERT, FAIL, "can't expand environment variable string")
+#endif /* H5_HAVE_WIN32_API */
+
+    /* If the table entry is in use, make some space */
+    if (H5PL_paths_g[index])
+        if (H5PL__make_space_at(index) < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "unable to make space in the table for the new entry")
+
+    /* Insert the copy of the search path into the table at the specified index */
+    H5PL_paths_g[index] = path_copy;
+    H5PL_num_paths_g++;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__insert_at() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__make_space_at()
+ *
+ * Purpose:     Free up a slot in the path table, moving existing path
+ *              entries as necessary.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5PL__make_space_at(unsigned int index)
+{
+    unsigned    u;                      /* iterator */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Check args - Just assert on package functions */
+    HDassert(index < H5PL_path_capacity_g);
+
+    /* Copy the paths back to make a space  */
+    for (u = H5PL_num_paths_g; u > index; u--)
+        H5PL_paths_g[u] = H5PL_paths_g[u-1];
+
+    H5PL_paths_g[index] = NULL;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__make_space_at() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__replace_at()
+ *
+ * Purpose:     Replace a path at a particular index in the path table.
+ *              The path in the table must exist and will be freed by this
+ *              function.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5PL__replace_at(const char *path, unsigned int index)
+{
+    char    *path_copy = NULL;      /* copy of path string (for storing) */
+    herr_t  ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check args - Just assert on package functions */
+    HDassert(path);
+    HDassert(HDstrlen(path));
+
+    /* Check that the table entry is in use */
+    if (!H5PL_paths_g[index])
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTFREE, FAIL, "path entry at index %u in the table is NULL", index)
+
+    /* Copy the path for storage so the caller can dispose of theirs */
+    if (NULL == (path_copy = H5MM_strdup(path)))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't make internal copy of path")
+
+#ifdef H5_HAVE_WIN32_API
+        /* Clean up Microsoft Windows environment variables in the path string */
+        if (H5_expand_windows_env_vars(&path_copy))
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTCONVERT, FAIL, "can't expand environment variable string")
+#endif /* H5_HAVE_WIN32_API */
+
+    /* Free the existing path entry */
+    H5PL_paths_g[index] = (char *)H5MM_xfree(H5PL_paths_g[index]);
+
+    /* Copy the search path into the table at the specified index */
+    H5PL_paths_g[index] = path_copy;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__replace_at() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__create_path_table
+ *
+ * Purpose:     Create the collection of paths that will be searched
+ *              when loading plugins.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__create_path_table(void)
+{
+    char        *env_var= NULL;         /* Path string from environment variable */
+    char        *paths = NULL;          /* Delimited paths string. Either from the
+                                         * environment variable or the default.
+                                         */
+    char        *next_path = NULL;      /* A path tokenized from the paths string */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Allocate memory for the path table */
+    H5PL_num_paths_g = 0;
+    H5PL_path_capacity_g = H5PL_INITIAL_PATH_CAPACITY;
+    if (NULL == (H5PL_paths_g = (char **)H5MM_calloc((size_t)H5PL_path_capacity_g * sizeof(char *))))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path table")
+
+    /* Retrieve paths from HDF5_PLUGIN_PATH if the user sets it
+     * or from the default paths if it isn't set.
+     */
+    env_var = HDgetenv("HDF5_PLUGIN_PATH");
+    if (NULL == env_var)
+        paths = H5MM_strdup(H5PL_DEFAULT_PATH);
+    else
+        paths = H5MM_strdup(env_var);
+
+    if (NULL == paths)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path copy")
+
+    /* Separate the paths and store them */
+    /* XXX: strtok() is not thread-safe */
+    next_path = HDstrtok(paths, H5PL_PATH_SEPARATOR);
+    while (next_path) {
+
+        /* Insert the path into the table */
+        if (H5PL__append_path(next_path) < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't insert path: %s", next_path)
+
+        /* Get the next path from the environment string */
+        next_path = HDstrtok(NULL, H5PL_PATH_SEPARATOR);
+    } /* end while */
+
+done:
+    if (paths)
+        paths = (char *)H5MM_xfree(paths);
+
+    /* Try to clean up on errors */
+    if (FAIL == ret_value) {
+        if (H5PL_paths_g)
+            H5PL_paths_g = (char **)H5MM_xfree(H5PL_paths_g);
+        H5PL_path_capacity_g = 0;
+    }
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__create_path_table() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__close_path_table
+ *
+ * Purpose:     Close the collection of paths that will be searched
+ *              when loading plugins.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__close_path_table(void)
+{
+    unsigned    u;                      /* iterator */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE_NOERR
+
+    /* Free paths */
+    for (u = 0; u < H5PL_num_paths_g; u++)
+        if (H5PL_paths_g[u])
+            H5PL_paths_g[u] = (char *)H5MM_xfree(H5PL_paths_g[u]);
+
+    /* Free path table */
+    H5PL_paths_g = (char **)H5MM_xfree(H5PL_paths_g);
+
+    /* Reset values */
+    H5PL_num_paths_g = 0;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+
+} /* end H5PL__close_path_table() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__get_num_paths
+ *
+ * Purpose:     Gets the number of plugin paths that have been stored.
+ *
+ * Return:      Success:    The number of paths
+ *              Failture:   Can't fail
+ *-------------------------------------------------------------------------
+ */
+unsigned
+H5PL__get_num_paths(void)
+{
+    FUNC_ENTER_PACKAGE_NOERR
+
+    FUNC_LEAVE_NOAPI(H5PL_num_paths_g)
+
+} /* end H5PL__get_num_paths() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__expand_path_table
+ *
+ * Purpose:     Expand the path table when it's full.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5PL__expand_path_table(void)
+{
+    herr_t      ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    /* Update the capacity */
+    H5PL_path_capacity_g += H5PL_PATH_CAPACITY_ADD;
+
+    /* Resize the array */
+    if(NULL == (H5PL_paths_g = (char **)H5MM_realloc(H5PL_paths_g, (size_t)H5PL_path_capacity_g * sizeof(char *))))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "allocating additional memory for path table failed")
+
+    /* Initialize the new memory */
+    HDmemset(H5PL_paths_g + H5PL_num_paths_g, 0, (size_t)H5PL_PATH_CAPACITY_ADD * sizeof(char *));
+
+done:
+    /* Set the path capacity back if there were problems */
+    if (FAIL == ret_value)
+        H5PL_path_capacity_g -= H5PL_PATH_CAPACITY_ADD;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__expand_path_table() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__append_path
+ *
+ * Purpose:     Insert a path at the end of the table.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__append_path(const char *path)
+{
+    herr_t  ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(path);
+    HDassert(HDstrlen(path));
+
+    /* Insert the path at the end of the table */
+    if (H5PL__insert_at(path, H5PL_num_paths_g) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to append search path")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__append_path() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__prepend_path
+ *
+ * Purpose:     Insert a path at the beginning of the table.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__prepend_path(const char *path)
+{
+    herr_t  ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(path);
+    HDassert(HDstrlen(path));
+
+    /* Insert the path at the beginning of the table */
+    if (H5PL__insert_at(path, 0) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to prepend search path")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__prepend_path() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__replace_path
+ *
+ * Purpose:     Replace a path at particular index in the table.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__replace_path(const char *path, unsigned int index)
+{
+    herr_t  ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(path);
+    HDassert(HDstrlen(path));
+    HDassert(index < H5PL_path_capacity_g);
+
+    /* Insert the path at the requested index */
+    if (H5PL__replace_at(path, index) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to replace search path")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__replace_path() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__insert_path
+ *
+ * Purpose:     Insert a path at particular index in the table, moving
+ *              any existing paths back to make space.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__insert_path(const char *path, unsigned int index)
+{
+    herr_t  ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(path);
+    HDassert(HDstrlen(path));
+    HDassert(index < H5PL_path_capacity_g);
+
+    /* Insert the path at the requested index */
+    if (H5PL__insert_at(path, index) < 0)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTINSERT, FAIL, "unable to insert search path")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__insert_path() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__remove_path
+ *
+ * Purpose:     Remove a path at particular index in the table, freeing
+ *              the path string and moving the paths down to close the gap.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__remove_path(unsigned int index)
+{
+    unsigned    u;                      /* iterator */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(index < H5PL_path_capacity_g);
+
+    /* Check if the path at that index is set */
+    if (!H5PL_paths_g[index])
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTDELETE, FAIL, "search path at index %u is NULL", index)
+
+    /* Delete the path */
+    H5PL_num_paths_g--;
+    H5PL_paths_g[index] = (char *)H5MM_xfree(H5PL_paths_g[index]);
+
+    /* Shift the paths down to close the gap */
+    for (u = index; u < H5PL_num_paths_g; u++)
+        H5PL_paths_g[u] = H5PL_paths_g[u+1];
+
+    /* Set the (former) last path to NULL */
+    H5PL_paths_g[H5PL_num_paths_g] = NULL;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__remove_path() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__get_path
+ *
+ * Purpose:     Get a pointer to a path at particular index in the table.
+ *
+ * Return:      Success:    A pointer to a path string stored in the table
+ *              Failure:    NULL
+ *
+ *-------------------------------------------------------------------------
+ */
+const char *
+H5PL__get_path(unsigned int index)
+{
+    char    *ret_value = NULL;    /* Return value */
+
+    FUNC_ENTER_PACKAGE
+
+    /* Get the path at the requested index */
+    if (index >= H5PL_num_paths_g)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, NULL, "path index %u is out of range in table", index)
+
+    return H5PL_paths_g[index];
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__replace_path() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__find_plugin_in_path_table
+ *
+ * Purpose:     Attempts to find a matching plugin in the file system
+ *              using the paths stored in the path table.
+ *.
+ *              The 'found' parameter will be set appropriately.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__find_plugin_in_path_table(const H5PL_search_params_t *search_params, hbool_t *found, const void **plugin_info)
+{
+    unsigned int    u;                          /* iterator */
+    herr_t          ret_value = SUCCEED;
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(search_params);
+    HDassert(found);
+    HDassert(plugin_info);
+
+    /* Initialize output parameters */
+    *found = FALSE;
+    *plugin_info = NULL;
+
+    /* Loop over the paths in the table, checking for an appropriate plugin */
+    for (u = 0; u < H5PL_num_paths_g; u++) {
+
+        /* Search for the plugin in this path */
+        if (H5PL__find_plugin_in_path(search_params, found, H5PL_paths_g[u], plugin_info) < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "search in path %s encountered an error", H5PL_paths_g[u])
+
+        /* Break out if found */
+        if (*found) {
+            if (!plugin_info)
+                HGOTO_ERROR(H5E_PLUGIN, H5E_BADVALUE, FAIL, "plugin info should not be NULL")
+            break;
+        }
+    }
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__find_plugin_in_path_table() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__find_plugin_in_path
+ *
+ * Purpose:     Given a path, this function opens the directory and envokes
+ *              another function to go through all files to find the right
+ *              plugin library. Two function definitions are for Unix and
+ *              Windows.
+ *
+ *              The found parameter will be set to TRUE and the info
+ *              parameter will be filled in on success.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef H5_HAVE_WIN32_API
+static herr_t
+H5PL__find_plugin_in_path(const H5PL_search_params_t *search_params, hbool_t *found, const char *dir, const void **plugin_info)
+{
+    char           *path = NULL;
+    DIR            *dirp = NULL;            /* Directory stream */
+    struct dirent  *dp = NULL;              /* Directory entry */
+    herr_t         ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    /* Check args - Just assert on package functions */
+    HDassert(search_params);
+    HDassert(found);
+    HDassert(dir);
+    HDassert(plugin_info);
+
+    /* Initialize the found parameter */
+    *found = FALSE;
+
+    /* Open the directory */
+    if (!(dirp = HDopendir(dir)))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_OPENERROR, FAIL, "can't open directory: %s", dir)
+
+    /* Iterate through all entries in the directory */
+    while (NULL != (dp = HDreaddir(dirp))) {
+
+        /* The library we are looking for should be called libxxx.so... on Unix
+         * or libxxx.xxx.dylib on Mac.
+         */
+#ifndef __CYGWIN__
+        if (!HDstrncmp(dp->d_name, "lib", (size_t)3) &&
+                (HDstrstr(dp->d_name, ".so") || HDstrstr(dp->d_name, ".dylib"))) {
+#else
+        if (!HDstrncmp(dp->d_name, "cyg", (size_t)3) &&
+                HDstrstr(dp->d_name, ".dll") ) {
+#endif
+
+            h5_stat_t   my_stat;
+            size_t      len;
+
+            /* Allocate & initialize the path name */
+            len = HDstrlen(dir) + HDstrlen(H5PL_PATH_SEPARATOR) + HDstrlen(dp->d_name) + 1 /*\0*/;
+
+            if (NULL == (path = (char *)H5MM_calloc(len)))
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
+
+            HDsnprintf(path, len, "%s/%s", dir, dp->d_name);
+
+            /* Get info for directory entry */
+            if (HDstat(path, &my_stat) == -1)
+                HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't stat file %s -- error was: %s", path, HDstrerror(errno))
+
+            /* If it is a directory, skip it */
+            if (S_ISDIR(my_stat.st_mode))
+                continue;
+
+            /* attempt to open the dynamic library as a filter library */
+            if (H5PL__open(path, search_params->type, search_params->key, found, plugin_info) < 0)
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "search in directory failed")
+            if (*found)
+                HGOTO_DONE(SUCCEED)
+
+            path = (char *)H5MM_xfree(path);
+        } /* end if */
+    } /* end while */
+
+done:
+    if (dirp)
+        if (HDclosedir(dirp) < 0)
+            HDONE_ERROR(H5E_FILE, H5E_CLOSEERROR, FAIL, "can't close directory: %s", HDstrerror(errno))
+
+    path = (char *)H5MM_xfree(path);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__find_plugin_in_path() */
+#else /* H5_HAVE_WIN32_API */
+static herr_t
+H5PL__find_plugin_in_path(const H5PL_search_params_t *search_params, hbool_t *found, const char *dir, const void **plugin_info)
+{
+    WIN32_FIND_DATAA    fdFile;
+    HANDLE              hFind = INVALID_HANDLE_VALUE;
+    char                *path = NULL;
+    char                service[2048];
+    herr_t              ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    /* Check args - Just assert on package functions */
+    HDassert(search_params);
+    HDassert(found);
+    HDassert(dir);
+    HDassert(plugin_info);
+
+    /* Initialize the found parameter */
+    *found = FALSE;
+
+    /* Specify a file mask. *.* = We want everything! */
+    HDsprintf(service, "%s\\*.dll", dir);
+    if ((hFind = FindFirstFileA(service, &fdFile)) == INVALID_HANDLE_VALUE)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_OPENERROR, FAIL, "can't open directory")
+
+    /* Loop over all the files */
+    do {
+        /* Ignore '.' and '..' */
+        if (HDstrcmp(fdFile.cFileName, ".") != 0 && HDstrcmp(fdFile.cFileName, "..") != 0) {
+
+            /* XXX: Probably just continue here and move the code below over one tab */
+
+            size_t      len;
+
+            /* Allocate & initialize the path name */
+            len = HDstrlen(dir) + HDstrlen(H5PL_PATH_SEPARATOR) + HDstrlen(fdFile.cFileName) + 1;
+
+            if (NULL == (path = (char *)H5MM_calloc(len)))
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for path")
+
+            HDsnprintf(path, len, "%s\\%s", dir, fdFile.cFileName);
+
+            /* Ignore directories */
+            if (fdFile.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
+                continue;
+
+            /* attempt to open the dynamic library as a filter library */
+            if (H5PL__open(path, search_params->type, search_params->key, found, plugin_info) < 0)
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "search in directory failed")
+            if (*found)
+                HGOTO_DONE(SUCCEED)
+
+            path = (char *)H5MM_xfree(path);
+        }
+    } while (FindNextFileA(hFind, &fdFile));
+
+done:
+    if (hFind != INVALID_HANDLE_VALUE)
+        FindClose(hFind);
+    if (path)
+        path = (char *)H5MM_xfree(path);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__find_plugin_in_path() */
+#endif /* H5_HAVE_WIN32_API */
+
diff --git a/src/H5PLpkg.h b/src/H5PLpkg.h
index 5cf3096..dfaa4af 100644
--- a/src/H5PLpkg.h
+++ b/src/H5PLpkg.h
@@ -5,14 +5,18 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
+/*
+ * Purpose: This file contains declarations which are visible only within
+ *          the H5PL package.  Source files outside the H5PL package should
+ *          include H5PLprivate.h instead.
+ */
+
 #if !(defined H5PL_FRIEND || defined H5PL_MODULE)
 #error "Do not include this file outside the H5PL package!"
 #endif
@@ -29,13 +33,92 @@
 /* Package Private Macros */
 /**************************/
 
-#define H5PL_MAX_PATH_NUM       16
+/* Whether to pre-load pathnames for plugin libraries */
+#define H5PL_DEFAULT_PATH       H5_DEFAULT_PLUGINDIR
+
+
+/****************************/
+/* Macros for supporting    */
+/* both Windows and POSIX   */
+/****************************/
+
+/*******************/
+/* Windows support */
+/*******************/
+/*
+ * SPECIAL WINDOWS NOTE
+ *
+ * Some of the Win32 API functions expand to fooA or fooW depending on
+ * whether UNICODE or _UNICODE are defined. You MUST explicitly use
+ * the A version of the functions to force char * behavior until we
+ * work out a scheme for proper Windows Unicode support.
+ *
+ * If you do not do this, people will be unable to incorporate our
+ * source code into their own CMake builds if they define UNICODE.
+ */
+#ifdef H5_HAVE_WIN32_API
+
+    /* The path separator on this platform */
+#   define H5PL_PATH_SEPARATOR      ";"
+
+    /* Handle for dynamic library */
+#   define H5PL_HANDLE HINSTANCE
+
+    /* Get a handle to a plugin library.  Windows: TEXT macro handles Unicode strings */
+#   define H5PL_OPEN_DLIB(S) LoadLibraryExA(S, NULL, LOAD_WITH_ALTERED_SEARCH_PATH)
+
+    /* Get the address of a symbol in dynamic library */
+#   define H5PL_GET_LIB_FUNC(H,N) GetProcAddress(H,N)
+
+    /* Close dynamic library */
+#   define H5PL_CLOSE_LIB(H) FreeLibrary(H)
+
+    /* Clear error - nothing to do */
+#   define H5PL_CLR_ERROR
+
+    /* maximum size for expanding env vars */
+#   define H5PL_EXPAND_BUFFER_SIZE 32767
+
+    typedef const void *(__cdecl *H5PL_get_plugin_info_t)(void);
+
+#else /* H5_HAVE_WIN32_API */
+
+    /*****************/
+    /* POSIX support */
+    /*****************/
+
+    /* The path separator on this platform */
+#   define H5PL_PATH_SEPARATOR     ":"
+
+    /* Handle for dynamic library */
+#   define H5PL_HANDLE void *
+
+    /* Get a handle to a plugin library.  Windows: TEXT macro handles Unicode strings */
+#   define H5PL_OPEN_DLIB(S) dlopen(S, RTLD_LAZY)
+
+    /* Get the address of a symbol in dynamic library */
+#   define H5PL_GET_LIB_FUNC(H,N) dlsym(H,N)
+
+    /* Close dynamic library */
+#   define H5PL_CLOSE_LIB(H) dlclose(H)
+
+    /* Clear error */
+#   define H5PL_CLR_ERROR HERROR(H5E_PLUGIN, H5E_CANTGET, "can't dlopen:%s", dlerror())
+
+    typedef const void *(*H5PL_get_plugin_info_t)(void);
+#endif /* H5_HAVE_WIN32_API */
 
 
 /****************************/
 /* Package Private Typedefs */
 /****************************/
 
+/* Data used to search for plugins */
+typedef struct H5PL_search_params_t {
+    H5PL_type_t         type;
+    H5PL_key_t          key;
+} H5PL_search_params_t;
+
 
 /*****************************/
 /* Package Private Variables */
@@ -46,5 +129,31 @@
 /* Package Private Prototypes */
 /******************************/
 
+/* Accessors to global variables and flags */
+H5_DLL herr_t H5PL__get_plugin_control_mask(unsigned int *mask /*out*/);
+H5_DLL herr_t H5PL__set_plugin_control_mask(unsigned int mask);
+
+/* Plugin search and manipulation */
+H5_DLL herr_t H5PL__open(const char *libname, H5PL_type_t type, H5PL_key_t key, hbool_t *success /*out*/, const void **plugin_info /*out*/);
+H5_DLL herr_t H5PL__close(H5PL_HANDLE handle);
+
+/* Plugin cache calls */
+H5_DLL herr_t H5PL__create_plugin_cache(void);
+H5_DLL herr_t H5PL__close_plugin_cache(hbool_t *already_closed /*out*/);
+H5_DLL herr_t H5PL__add_plugin(H5PL_type_t type, H5PL_key_t key, H5PL_HANDLE handle);
+H5_DLL herr_t H5PL__find_plugin_in_cache(const H5PL_search_params_t *search_params, hbool_t *found /*out*/, const void **plugin_info /*out*/);
+
+/* Plugin search path calls */
+H5_DLL herr_t H5PL__create_path_table(void);
+H5_DLL herr_t H5PL__close_path_table(void);
+H5_DLL unsigned H5PL__get_num_paths(void);
+H5_DLL herr_t H5PL__append_path(const char *path);
+H5_DLL herr_t H5PL__prepend_path(const char *path);
+H5_DLL herr_t H5PL__replace_path(const char *path, unsigned int index);
+H5_DLL herr_t H5PL__insert_path(const char *path, unsigned int index);
+H5_DLL herr_t H5PL__remove_path(unsigned int index);
+H5_DLL const char *H5PL__get_path(unsigned int index);
+H5_DLL herr_t H5PL__find_plugin_in_path_table(const H5PL_search_params_t *search_params, hbool_t *found /*out*/, const void **plugin_info /*out*/);
+
 #endif /* _H5PLpkg_H */
 
diff --git a/src/H5PLplugin_cache.c b/src/H5PLplugin_cache.c
new file mode 100644
index 0000000..e905ac2
--- /dev/null
+++ b/src/H5PLplugin_cache.c
@@ -0,0 +1,307 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose: Code to implement a plugin cache which stores information
+ *          about plugins which have already been loaded.
+ *
+ *          The plugin cache is implemented as a dynamic, global array which
+ *          will grow as new plugins are added. The capacity of the cache
+ *          never shrinks since plugins stay in memory once loaded.
+ *
+ *          Note that this functionality has absolutely nothing to do with
+ *          the metadata or chunk caches.
+ */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5PLmodule.h"          /* This source code file is part of the H5PL module */
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"      /* Generic Functions            */
+#include "H5Eprivate.h"     /* Error handling               */
+#include "H5MMprivate.h"    /* Memory management            */
+#include "H5PLpkg.h"        /* Plugin                       */
+#include "H5Zprivate.h"     /* Filter pipeline              */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+/* Initial capacity of the plugin cache */
+#define H5PL_INITIAL_CACHE_CAPACITY     16
+
+/* The amount to add to the capacity when the cache is full */
+#define H5PL_CACHE_CAPACITY_ADD         16
+
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/* Type for the list of info for opened plugin libraries */
+typedef struct H5PL_plugin_t {
+    H5PL_type_t     type;           /* Plugin type                          */
+    H5PL_key_t      key;            /* Unique key to identify the plugin    */
+    H5PL_HANDLE     handle;         /* Plugin handle                        */
+} H5PL_plugin_t;
+
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+static herr_t H5PL__expand_cache(void);
+
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Cache for storing opened plugin libraries */
+static H5PL_plugin_t   *H5PL_cache_g = NULL;
+
+/* The number of stored plugins */
+static unsigned int     H5PL_num_plugins_g = 0;
+
+/* The capacity of the plugin cache */
+static unsigned int     H5PL_cache_capacity_g = 0;
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__create_plugin_cache
+ *
+ * Purpose:     Create the cache that will store plugins that have already
+ *              been loaded.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__create_plugin_cache(void)
+{
+    herr_t      ret_value = SUCCEED;
+
+    FUNC_ENTER_PACKAGE
+
+    /* Allocate memory for the plugin cache */
+    H5PL_num_plugins_g = 0;
+
+    H5PL_cache_capacity_g = H5PL_INITIAL_CACHE_CAPACITY;
+
+    if (NULL == (H5PL_cache_g = (H5PL_plugin_t *)H5MM_calloc((size_t)H5PL_cache_capacity_g * sizeof(H5PL_plugin_t))))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for plugin cache")
+
+done:
+    /* Try to clean up on errors */
+    if (FAIL == ret_value) {
+        if (H5PL_cache_g)
+            H5PL_cache_g = (H5PL_plugin_t *)H5MM_xfree(H5PL_cache_g);
+        H5PL_cache_capacity_g = 0;
+    }
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__create_plugin_cache() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__close_plugin_cache
+ *
+ * Purpose:     Close the cache of plugins that have already been loaded,
+ *              closing all the plugins contained inside.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__close_plugin_cache(hbool_t *already_closed /*out*/)
+{
+    unsigned int    u;                      /* iterator */
+    herr_t          ret_value = SUCCEED;
+
+    FUNC_ENTER_PACKAGE_NOERR
+
+    /* Close opened dynamic libraries */
+    if (H5PL_cache_g) {
+
+        /* Close any cached plugins */
+        for (u = 0; u < H5PL_num_plugins_g; u++)
+            H5PL__close((H5PL_cache_g[u]).handle);
+
+        /* Free the cache array */
+        H5PL_cache_g = (H5PL_plugin_t *)H5MM_xfree(H5PL_cache_g);
+        H5PL_num_plugins_g = 0;
+        H5PL_cache_capacity_g = 0;
+
+        /* Note that actually closed the table (needed by package close call) */
+        *already_closed = FALSE;
+    }
+    else
+        *already_closed = TRUE;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__close_plugin_cache() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__expand_cache
+ *
+ * Purpose:     Expand the plugin cache when it's full.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5PL__expand_cache(void)
+{
+    herr_t      ret_value = SUCCEED;
+
+    FUNC_ENTER_STATIC
+
+    /* Update the capacity */
+    H5PL_cache_capacity_g += H5PL_CACHE_CAPACITY_ADD;
+
+    /* Resize the array */
+    if(NULL == (H5PL_cache_g = (H5PL_plugin_t *)H5MM_realloc(H5PL_cache_g, (size_t)H5PL_cache_capacity_g * sizeof(H5PL_plugin_t))))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "allocating additional memory for plugin cache failed")
+
+    /* Initialize the new memory */
+    HDmemset(H5PL_cache_g + H5PL_num_plugins_g, 0, (size_t)H5PL_CACHE_CAPACITY_ADD * sizeof(H5PL_plugin_t));
+
+done:
+    /* Set the cache capacity back if there were problems */
+    if (FAIL == ret_value)
+        H5PL_cache_capacity_g -= H5PL_CACHE_CAPACITY_ADD;
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__expand_cache() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__add_plugin
+ *
+ * Purpose:     Add a plugin to the plugin cache.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5PL__add_plugin(H5PL_type_t type, H5PL_key_t key, H5PL_HANDLE handle)
+{
+    herr_t      ret_value = SUCCEED;
+
+    FUNC_ENTER_PACKAGE
+
+    /* Expand the cache if it is too small */
+    if (H5PL_num_plugins_g >= H5PL_cache_capacity_g)
+        if (H5PL__expand_cache() < 0)
+            HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't expand plugin cache")
+
+    /* Store the plugin info and bump the # of plugins */
+    H5PL_cache_g[H5PL_num_plugins_g].type       = type;
+    H5PL_cache_g[H5PL_num_plugins_g].key        = key;
+    H5PL_cache_g[H5PL_num_plugins_g].handle     = handle;
+
+    H5PL_num_plugins_g++;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__add_plugin() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5PL__find_plugin_in_cache
+ *
+ * Purpose:     Attempts to find a matching plugin from the cache.
+ *
+ *              The 'found' parameter will be set appropriately.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+/* See the other use of H5PL_GET_LIB_FUNC() for an explanation
+ * for why we disable -Wpedantic here.
+ */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wpedantic"
+herr_t
+H5PL__find_plugin_in_cache(const H5PL_search_params_t *search_params, hbool_t *found, const void **plugin_info)
+{
+    unsigned int    u;                          /* iterator */
+    herr_t          ret_value = SUCCEED;
+
+    FUNC_ENTER_PACKAGE
+
+    /* Check args - Just assert on package functions */
+    HDassert(search_params);
+    HDassert(found);
+    HDassert(plugin_info);
+
+    /* Initialize output parameters */
+    *found = FALSE;
+    *plugin_info = NULL;
+
+    /* Loop over all the plugins, looking for one that matches */
+    for (u = 0; u < H5PL_num_plugins_g; u++) {
+
+        /* If the plugin type (filter, etc.) and ID match, query the plugin for its info */
+        if ((search_params->type == (H5PL_cache_g[u]).type) && (search_params->key.id == (H5PL_cache_g[u]).key.id)) {
+
+            H5PL_get_plugin_info_t      get_plugin_info_function;
+            const H5Z_class2_t          *filter_info;
+
+            /* Get the "get plugin info" function from the plugin. */
+            if (NULL == (get_plugin_info_function = (H5PL_get_plugin_info_t)H5PL_GET_LIB_FUNC((H5PL_cache_g[u]).handle, "H5PLget_plugin_info")))
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "can't get function for H5PLget_plugin_info")
+
+            /* Call the "get plugin info" function */
+            if (NULL == (filter_info = (const H5Z_class2_t *)(*get_plugin_info_function)()))
+                HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "can't get plugin info")
+
+            /* Set output parameters */
+            *found = TRUE;
+            *plugin_info = filter_info;
+
+            /* No need to continue processing */
+            break;
+
+        } /* end if */
+
+    } /* end for */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5PL__find_plugin_in_cache() */
+#pragma GCC diagnostic pop
+
diff --git a/src/H5PLprivate.h b/src/H5PLprivate.h
index 77e115b..cc2e258 100644
--- a/src/H5PLprivate.h
+++ b/src/H5PLprivate.h
@@ -4,16 +4,14 @@
  *                                                                           *
  * This file is part of HDF5. The full HDF5 copyright notice, including      *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic document set and is     *
- * linked from the top-level documents page.  It can also be found at        *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access   *
- * to either file, you may request a copy from help@hdfgroup.org.            *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/* Programmer:  Raymond Lu <songyulu@hdfgroup.org>
- *              13 February 2013
+/*
+ * This file contains private information about the H5PL module
  */
 
 #ifndef _H5PLprivate_H
@@ -35,6 +33,11 @@
 /* Library Private Typedefs */
 /****************************/
 
+/* The key that will be used to find the plugin */
+typedef union H5PL_key_t {
+    int         id;         /* filters      */
+} H5PL_key_t;
+
 
 /*****************************/
 /* Library-private Variables */
@@ -46,7 +49,7 @@
 /***************************************/
 
 /* Internal API routines */
-H5_DLL const void *H5PL_load(H5PL_type_t plugin_type, int type_id);
+H5_DLL const void *H5PL_load(H5PL_type_t plugin_type, H5PL_key_t key);
 
 #endif /* _H5PLprivate_H */
 
diff --git a/src/H5PLpublic.h b/src/H5PLpublic.h
index 5e4dcae..fe5bdfb 100644
--- a/src/H5PLpublic.h
+++ b/src/H5PLpublic.h
@@ -4,16 +4,14 @@
  *                                                                           *
  * This file is part of HDF5. The full HDF5 copyright notice, including      *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic document set and is     *
- * linked from the top-level documents page.  It can also be found at        *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have access   *
- * to either file, you may request a copy from help@hdfgroup.org.            *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/* Programmer:  Raymond Lu <songyulu@hdfgroup.org>
- *              13 February 2013
+/*
+ * This file contains public declarations for the H5PL module.
  */
 
 #ifndef _H5PLpublic_H
@@ -26,31 +24,35 @@
 /* Public Typedefs */
 /*******************/
 
+/* Special string to indicate no plugin loading.
+ */
+#define H5PL_NO_PLUGIN          "::"
+
 /* Plugin type used by the plugin library */
 typedef enum H5PL_type_t {
-    H5PL_TYPE_ERROR        = -1,  /*error                    */
-    H5PL_TYPE_FILTER       = 0,   /*filter                   */
-    H5PL_TYPE_NONE         = 1    /*this must be last!       */
+    H5PL_TYPE_ERROR         = -1,   /* Error                */
+    H5PL_TYPE_FILTER        =  0,   /* Filter               */
+    H5PL_TYPE_NONE          =  1    /* This must be last!   */
 } H5PL_type_t;
 
 /* Common dynamic plugin type flags used by the set/get_loading_state functions */
-#define H5PL_FILTER_PLUGIN 0x0001
-#define H5PL_ALL_PLUGIN 0xFFFF
+#define H5PL_FILTER_PLUGIN      0x0001
+#define H5PL_ALL_PLUGIN         0xFFFF
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 /* plugin state */
-H5_DLL herr_t H5PLset_loading_state(unsigned int plugin_type);
-H5_DLL herr_t H5PLget_loading_state(unsigned int* plugin_type/*out*/);
-H5_DLL herr_t H5PLappend(const char* plugin_path);
-H5_DLL herr_t H5PLprepend(const char* plugin_path);
-H5_DLL herr_t H5PLreplace(const char* plugin_path, unsigned int index);
-H5_DLL herr_t H5PLinsert(const char* plugin_path, unsigned int index);
+H5_DLL herr_t H5PLset_loading_state(unsigned int plugin_control_mask);
+H5_DLL herr_t H5PLget_loading_state(unsigned int *plugin_control_mask /*out*/);
+H5_DLL herr_t H5PLappend(const char *search_path);
+H5_DLL herr_t H5PLprepend(const char *search_path);
+H5_DLL herr_t H5PLreplace(const char *search_path, unsigned int index);
+H5_DLL herr_t H5PLinsert(const char *search_path, unsigned int index);
 H5_DLL herr_t H5PLremove(unsigned int index);
-H5_DLL ssize_t H5PLget(unsigned int index, char *pathname/*out*/, size_t size);
-H5_DLL unsigned int H5PLsize(void);
+H5_DLL ssize_t H5PLget(unsigned int index, char *path_buf /*out*/, size_t buf_size);
+H5_DLL herr_t H5PLsize(unsigned int *num_paths /*out*/);
 
 #ifdef __cplusplus
 }
diff --git a/src/H5Pacpl.c b/src/H5Pacpl.c
index bfed332..4368dd6 100644
--- a/src/H5Pacpl.c
+++ b/src/H5Pacpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Pdapl.c b/src/H5Pdapl.c
index aa58dc4..da06297 100644
--- a/src/H5Pdapl.c
+++ b/src/H5Pdapl.c
@@ -5,21 +5,19 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
  *
- * Created:		H5Pdapl.c
+ * Created:        H5Pdapl.c
  *              October 27, 2008
  *              Neil Fortner <nfortne2@hdfgroup.org>
  *
- * Purpose:		Dataset access property list class routines
+ * Purpose:        Dataset access property list class routines
  *
  *-------------------------------------------------------------------------
  */
@@ -34,13 +32,13 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions */
-#include "H5Dprivate.h"		/* Datasets */
-#include "H5Eprivate.h"		/* Error handling */
-#include "H5Fprivate.h"		/* Files */
-#include "H5Iprivate.h"		/* IDs */
-#include "H5Ppkg.h"         /* Property lists */
-#include "H5MMprivate.h"	/* Memory management */
+#include "H5private.h"        /* Generic Functions */
+#include "H5Dprivate.h"       /* Datasets */
+#include "H5Eprivate.h"       /* Error handling */
+#include "H5Fprivate.h"       /* Files */
+#include "H5Iprivate.h"       /* IDs */
+#include "H5Ppkg.h"           /* Property lists */
+#include "H5MMprivate.h"      /* Memory management */
 
 
 /****************/
@@ -73,9 +71,20 @@
 #define H5D_ACS_VDS_PRINTF_GAP_DEF              (hsize_t)0
 #define H5D_ACS_VDS_PRINTF_GAP_ENC              H5P__encode_hsize_t
 #define H5D_ACS_VDS_PRINTF_GAP_DEC              H5P__decode_hsize_t
+/* Definitions for VDS file prefix */
+#define H5D_ACS_VDS_PREFIX_SIZE                 sizeof(char *)
+#define H5D_ACS_VDS_PREFIX_DEF                  NULL /*default is no prefix */
+#define H5D_ACS_VDS_PREFIX_SET                  H5P__dapl_vds_file_pref_set
+#define H5D_ACS_VDS_PREFIX_GET                  H5P__dapl_vds_file_pref_get
+#define H5D_ACS_VDS_PREFIX_ENC                  H5P__dapl_vds_file_pref_enc
+#define H5D_ACS_VDS_PREFIX_DEC                  H5P__dapl_vds_file_pref_dec
+#define H5D_ACS_VDS_PREFIX_DEL                  H5P__dapl_vds_file_pref_del
+#define H5D_ACS_VDS_PREFIX_COPY                 H5P__dapl_vds_file_pref_copy
+#define H5D_ACS_VDS_PREFIX_CMP                  H5P__dapl_vds_file_pref_cmp
+#define H5D_ACS_VDS_PREFIX_CLOSE                H5P__dapl_vds_file_pref_close
 /* Definition for append flush */
-#define H5D_ACS_APPEND_FLUSH_SIZE            	sizeof(H5D_append_flush_t)
-#define H5D_ACS_APPEND_FLUSH_DEF             	{0,{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},NULL,NULL}
+#define H5D_ACS_APPEND_FLUSH_SIZE               sizeof(H5D_append_flush_t)
+#define H5D_ACS_APPEND_FLUSH_DEF                {0,{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0},NULL,NULL}
 /* Definitions for external file prefix */
 #define H5D_ACS_EFILE_PREFIX_SIZE               sizeof(char *)
 #define H5D_ACS_EFILE_PREFIX_DEF                NULL /*default is no prefix */
@@ -114,6 +123,14 @@ static herr_t H5P__decode_chunk_cache_nbytes(const void **_pp, void *_value);
 /* Property list callbacks */
 static herr_t H5P__dacc_vds_view_enc(const void *value, void **pp, size_t *size);
 static herr_t H5P__dacc_vds_view_dec(const void **pp, void *value);
+static herr_t H5P__dapl_vds_file_pref_set(hid_t prop_id, const char* name, size_t size, void* value);
+static herr_t H5P__dapl_vds_file_pref_get(hid_t prop_id, const char* name, size_t size, void* value);
+static herr_t H5P__dapl_vds_file_pref_enc(const void *value, void **_pp, size_t *size);
+static herr_t H5P__dapl_vds_file_pref_dec(const void **_pp, void *value);
+static herr_t H5P__dapl_vds_file_pref_del(hid_t prop_id, const char* name, size_t size, void* value);
+static herr_t H5P__dapl_vds_file_pref_copy(const char* name, size_t size, void* value);
+static int H5P__dapl_vds_file_pref_cmp(const void *value1, const void *value2, size_t size);
+static herr_t H5P__dapl_vds_file_pref_close(const char* name, size_t size, void* value);
 
 /* Property list callbacks */
 static herr_t H5P__dapl_efile_pref_set(hid_t prop_id, const char* name, size_t size, void* value);
@@ -132,21 +149,21 @@ static herr_t H5P__dapl_efile_pref_close(const char* name, size_t size, void* va
 
 /* Dataset access property list class library initialization object */
 const H5P_libclass_t H5P_CLS_DACC[1] = {{
-    "dataset access",		/* Class name for debugging     */
+    "dataset access",           /* Class name for debugging     */
     H5P_TYPE_DATASET_ACCESS,    /* Class type                   */
 
-    &H5P_CLS_LINK_ACCESS_g,	/* Parent class                 */
-    &H5P_CLS_DATASET_ACCESS_g,	/* Pointer to class             */
-    &H5P_CLS_DATASET_ACCESS_ID_g,	/* Pointer to class ID          */
-    &H5P_LST_DATASET_ACCESS_ID_g,	/* Pointer to default property list ID */
-    H5P__dacc_reg_prop,		/* Default property registration routine */
-
-    NULL,		        /* Class creation callback      */
-    NULL,		        /* Class creation callback info */
-    NULL,		        /* Class copy callback          */
-    NULL,		        /* Class copy callback info     */
-    NULL,		        /* Class close callback         */
-    NULL 		        /* Class close callback info    */
+    &H5P_CLS_LINK_ACCESS_g,          /* Parent class                 */
+    &H5P_CLS_DATASET_ACCESS_g,       /* Pointer to class             */
+    &H5P_CLS_DATASET_ACCESS_ID_g,    /* Pointer to class ID          */
+    &H5P_LST_DATASET_ACCESS_ID_g,    /* Pointer to default property list ID */
+    H5P__dacc_reg_prop,         /* Default property registration routine */
+
+    NULL,                /* Class creation callback      */
+    NULL,                /* Class creation callback info */
+    NULL,                /* Class copy callback          */
+    NULL,                /* Class copy callback info     */
+    NULL,                /* Class close callback         */
+    NULL                 /* Class close callback info    */
 }};
 
 
@@ -160,8 +177,9 @@ const H5P_libclass_t H5P_CLS_DACC[1] = {{
 /*******************/
 
 /* Property value defaults */
-static const H5D_append_flush_t H5D_def_append_flush_g = H5D_ACS_APPEND_FLUSH_DEF;       /* Default setting for append flush */
-static const char *H5D_def_efile_prefix_g = H5D_ACS_EFILE_PREFIX_DEF; /* Default external file prefix string */
+static const H5D_append_flush_t H5D_def_append_flush_g = H5D_ACS_APPEND_FLUSH_DEF;   /* Default setting for append flush */
+static const char *H5D_def_efile_prefix_g = H5D_ACS_EFILE_PREFIX_DEF;                /* Default external file prefix string */
+static const char *H5D_def_vds_prefix_g = H5D_ACS_VDS_PREFIX_DEF;                    /* Default vds prefix string */
 
 
 /*-------------------------------------------------------------------------
@@ -171,9 +189,6 @@ static const char *H5D_def_efile_prefix_g = H5D_ACS_EFILE_PREFIX_DEF; /* Default
  *              properties
  *
  * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Neil Fortner
- *              October 27, 2008
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -189,17 +204,17 @@ H5P__dacc_reg_prop(H5P_genclass_t *pclass)
     FUNC_ENTER_STATIC
 
     /* Register the size of raw data chunk cache (elements) */
-    if(H5P_register_real(pclass, H5D_ACS_DATA_CACHE_NUM_SLOTS_NAME, H5D_ACS_DATA_CACHE_NUM_SLOTS_SIZE, &rdcc_nslots, 
+    if(H5P_register_real(pclass, H5D_ACS_DATA_CACHE_NUM_SLOTS_NAME, H5D_ACS_DATA_CACHE_NUM_SLOTS_SIZE, &rdcc_nslots,
              NULL, NULL, NULL, H5D_ACS_DATA_CACHE_NUM_SLOTS_ENC, H5D_ACS_DATA_CACHE_NUM_SLOTS_DEC, NULL, NULL, NULL, NULL) < 0)
          HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the size of raw data chunk cache(bytes) */
-    if(H5P_register_real(pclass, H5D_ACS_DATA_CACHE_BYTE_SIZE_NAME, H5D_ACS_DATA_CACHE_BYTE_SIZE_SIZE, &rdcc_nbytes, 
+    if(H5P_register_real(pclass, H5D_ACS_DATA_CACHE_BYTE_SIZE_NAME, H5D_ACS_DATA_CACHE_BYTE_SIZE_SIZE, &rdcc_nbytes,
              NULL, NULL, NULL, H5D_ACS_DATA_CACHE_BYTE_SIZE_ENC, H5D_ACS_DATA_CACHE_BYTE_SIZE_DEC, NULL, NULL, NULL, NULL) < 0)
          HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the preemption for reading chunks */
-    if(H5P_register_real(pclass, H5D_ACS_PREEMPT_READ_CHUNKS_NAME, H5D_ACS_PREEMPT_READ_CHUNKS_SIZE, &rdcc_w0, 
+    if(H5P_register_real(pclass, H5D_ACS_PREEMPT_READ_CHUNKS_NAME, H5D_ACS_PREEMPT_READ_CHUNKS_SIZE, &rdcc_w0,
              NULL, NULL, NULL, H5D_ACS_PREEMPT_READ_CHUNKS_ENC, H5D_ACS_PREEMPT_READ_CHUNKS_DEC, NULL, NULL, NULL, NULL) < 0)
          HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
@@ -215,14 +230,20 @@ H5P__dacc_reg_prop(H5P_genclass_t *pclass)
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
+    /* Register property for vds prefix */
+    if(H5P_register_real(pclass, H5D_ACS_VDS_PREFIX_NAME, H5D_ACS_VDS_PREFIX_SIZE, &H5D_def_vds_prefix_g,
+            NULL, H5D_ACS_VDS_PREFIX_SET, H5D_ACS_VDS_PREFIX_GET, H5D_ACS_VDS_PREFIX_ENC, H5D_ACS_VDS_PREFIX_DEC,
+            H5D_ACS_VDS_PREFIX_DEL, H5D_ACS_VDS_PREFIX_COPY, H5D_ACS_VDS_PREFIX_CMP, H5D_ACS_VDS_PREFIX_CLOSE) < 0)
+         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
+
     /* Register info for append flush */
     /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5D_ACS_APPEND_FLUSH_NAME, H5D_ACS_APPEND_FLUSH_SIZE, &H5D_def_append_flush_g, 
+    if(H5P_register_real(pclass, H5D_ACS_APPEND_FLUSH_NAME, H5D_ACS_APPEND_FLUSH_SIZE, &H5D_def_append_flush_g,
              NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
          HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register property for external file prefix */
-    if(H5P_register_real(pclass, H5D_ACS_EFILE_PREFIX_NAME, H5D_ACS_EFILE_PREFIX_SIZE, &H5D_def_efile_prefix_g, 
+    if(H5P_register_real(pclass, H5D_ACS_EFILE_PREFIX_NAME, H5D_ACS_EFILE_PREFIX_SIZE, &H5D_def_efile_prefix_g,
             NULL, H5D_ACS_EFILE_PREFIX_SET, H5D_ACS_EFILE_PREFIX_GET, H5D_ACS_EFILE_PREFIX_ENC, H5D_ACS_EFILE_PREFIX_DEC,
             H5D_ACS_EFILE_PREFIX_DEL, H5D_ACS_EFILE_PREFIX_COPY, H5D_ACS_EFILE_PREFIX_CMP, H5D_ACS_EFILE_PREFIX_CLOSE) < 0)
          HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
@@ -231,6 +252,254 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__dacc_reg_prop() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5P__dapl_vds_file_pref_set
+ *
+ * Purpose:     Copies a vds file prefix property when it's set
+ *              for a property list
+ *
+ * Return:      SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__dapl_vds_file_pref_set(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED *name,
+    size_t H5_ATTR_UNUSED size, void *value)
+{
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Sanity check */
+    HDassert(value);
+
+    /* Copy the prefix */
+    *(char **)value = H5MM_xstrdup(*(const char **)value);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__dapl_vds_file_pref_set() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5P__dapl_vds_file_pref_get
+ *
+ * Purpose:     Copies a vds file prefix property when it's retrieved
+ *              from a property list
+ *
+ * Return:      SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__dapl_vds_file_pref_get(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED *name,
+    size_t H5_ATTR_UNUSED size, void *value)
+{
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Sanity check */
+    HDassert(value);
+
+    /* Copy the prefix */
+    *(char **)value = H5MM_xstrdup(*(const char **)value);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__dapl_vds_file_pref_get() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5P__dapl_vds_file_pref_enc
+ *
+ * Purpose:     Callback routine which is called whenever the vds file flags
+ *              property in the dataset access property list is
+ *              encoded.
+ *
+ * Return:      SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__dapl_vds_file_pref_enc(const void *value, void **_pp, size_t *size)
+{
+    const char *vds_file_pref = *(const char * const *)value;
+    uint8_t **pp = (uint8_t **)_pp;
+    size_t len = 0;
+    uint64_t enc_value;
+    unsigned enc_size;
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
+
+    /* calculate prefix length */
+    if(NULL != vds_file_pref)
+        len = HDstrlen(vds_file_pref);
+
+    enc_value = (uint64_t)len;
+    enc_size = H5VM_limit_enc_size(enc_value);
+    HDassert(enc_size < 256);
+
+    if(NULL != *pp) {
+        /* encode the length of the prefix */
+        *(*pp)++ = (uint8_t)enc_size;
+        UINT64ENCODE_VAR(*pp, enc_value, enc_size);
+
+        /* encode the prefix */
+        if(NULL != vds_file_pref) {
+            HDmemcpy(*(char **)pp, vds_file_pref, len);
+            *pp += len;
+        } /* end if */
+    } /* end if */
+
+    *size += (1 + enc_size);
+    if(NULL != vds_file_pref)
+        *size += len;
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__dapl_vds_file_pref_enc() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5P__dapl_vds_file_pref_dec
+ *
+ * Purpose:     Callback routine which is called whenever the vds file prefix
+ *              property in the dataset access property list is
+ *              decoded.
+ *
+ * Return:      SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__dapl_vds_file_pref_dec(const void **_pp, void *_value)
+{
+    char **vds_file_pref = (char **)_value;
+    const uint8_t **pp = (const uint8_t **)_pp;
+    size_t len;
+    uint64_t enc_value;                 /* Decoded property value */
+    unsigned enc_size;                  /* Size of encoded property */
+    herr_t ret_value = SUCCEED;
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    HDassert(pp);
+    HDassert(*pp);
+    HDassert(vds_file_pref);
+    HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
+
+    /* Decode the size */
+    enc_size = *(*pp)++;
+    HDassert(enc_size < 256);
+
+    /* Decode the value */
+    UINT64DECODE_VAR(*pp, enc_value, enc_size);
+    len = (size_t)enc_value;
+
+    if(0 != len) {
+        /* Make a copy of the user's prefix string */
+        if(NULL == (*vds_file_pref = (char *)H5MM_malloc(len + 1)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "memory allocation failed for prefix")
+        HDstrncpy(*vds_file_pref, *(const char **)pp, len);
+        (*vds_file_pref)[len] = '\0';
+
+        *pp += len;
+    } /* end if */
+    else
+        *vds_file_pref = NULL;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5P__dapl_vds_file_pref_dec() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5P__dapl_vds_file_pref_del
+ *
+ * Purpose:     Frees memory used to store the vds file prefix string
+ *
+ * Return:      SUCCEED (Can't fail)
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__dapl_vds_file_pref_del(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED *name,
+    size_t H5_ATTR_UNUSED size, void *value)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(value);
+
+    H5MM_xfree(*(void **)value);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__dapl_vds_file_pref_del() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5P__dapl_vds_file_pref_copy
+ *
+ * Purpose:     Creates a copy of the vds file prefix string
+ *
+ * Return:      SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__dapl_vds_file_pref_copy(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_UNUSED size, void *value)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(value);
+
+    *(char **)value = H5MM_xstrdup(*(const char **)value);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__dapl_vds_file_pref_copy() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:       H5P__dapl_vds_file_pref_cmp
+ *
+ * Purpose:        Callback routine which is called whenever the vds file prefix
+ *                 property in the dataset creation property list is
+ *                 compared.
+ *
+ * Return:         zero if VALUE1 and VALUE2 are equal, non zero otherwise.
+ *-------------------------------------------------------------------------
+ */
+static int
+H5P__dapl_vds_file_pref_cmp(const void *value1, const void *value2, size_t H5_ATTR_UNUSED size)
+{
+    const char *pref1 = *(const char * const *)value1;
+    const char *pref2 = *(const char * const *)value2;
+    int ret_value = 0;
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    if(NULL == pref1 && NULL != pref2)
+        HGOTO_DONE(1);
+    if(NULL != pref1 && NULL == pref2)
+        HGOTO_DONE(-1);
+    if(NULL != pref1 && NULL != pref2)
+        ret_value = HDstrcmp(pref1, pref2);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5P__dapl_vds_file_pref_cmp() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5P__dapl_vds_file_pref_close
+ *
+ * Purpose:     Frees memory used to store the vds file prefix string
+ *
+ * Return:      SUCCEED/FAIL
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__dapl_vds_file_pref_close(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_UNUSED size, void *value)
+{
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(value);
+
+    H5MM_xfree(*(void **)value);
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__dapl_vds_file_pref_close() */
+
 
 /*-------------------------------------------------------------------------
  * Function:    H5P__dapl_efile_pref_set
@@ -239,7 +508,6 @@ done:
  *              for a property list
  *
  * Return:      SUCCEED/FAIL
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -265,7 +533,6 @@ H5P__dapl_efile_pref_set(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED
  *              from a property list
  *
  * Return:      SUCCEED/FAIL
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -292,7 +559,6 @@ H5P__dapl_efile_pref_get(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED
  *              encoded.
  *
  * Return:      SUCCEED/FAIL
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -343,8 +609,7 @@ H5P__dapl_efile_pref_enc(const void *value, void **_pp, size_t *size)
  *              property in the dataset access property list is
  *              decoded.
  *
- * Return:	    SUCCEED/FAIL
- *
+ * Return:        SUCCEED/FAIL
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -395,7 +660,6 @@ done:
  * Purpose:     Frees memory used to store the external file prefix string
  *
  * Return:      SUCCEED (Can't fail)
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -418,7 +682,6 @@ H5P__dapl_efile_pref_del(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_UNUSED
  * Purpose:     Creates a copy of the external file prefix string
  *
  * Return:      SUCCEED/FAIL
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -442,7 +705,6 @@ H5P__dapl_efile_pref_copy(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_UNUSED
  *                 compared.
  *
  * Return:         zero if VALUE1 and VALUE2 are equal, non zero otherwise.
- *
  *-------------------------------------------------------------------------
  */
 static int
@@ -472,7 +734,6 @@ done:
  * Purpose:     Frees memory used to store the external file prefix string
  *
  * Return:      SUCCEED/FAIL
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -489,33 +750,27 @@ H5P__dapl_efile_pref_close(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_UNUSE
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_chunk_cache
- *
- * Purpose:	Set the number of objects in the meta data cache and the
- *		maximum number of chunks and bytes in the raw data chunk cache.
- *      Once set, these values will override the values in the file access
- *      property list.  Each of thhese values can be individually unset
- *      (or not set at all) by passing the macros:
- *      H5D_CHUNK_CACHE_NCHUNKS_DEFAULT,
- *      H5D_CHUNK_CACHE_NSLOTS_DEFAULT, and/or
- *      H5D_CHUNK_CACHE_W0_DEFAULT
- *      as appropriate.
- *
- * 		The RDCC_W0 value should be between 0 and 1 inclusive and
- *		indicates how much chunks that have been fully read or fully
- *		written are favored for preemption.  A value of zero means
- *		fully read or written chunks are treated no differently than
- *		other chunks (the preemption is strictly LRU) while a value
- *		of one means fully read chunks are always preempted before
- *		other chunks.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Neil Fortner
- *              Monday, October 27, 2008
- *
- * Modifications:
- *
+ * Function:    H5Pset_chunk_cache
+ *
+ * Purpose:    Set the number of objects in the meta data cache and the
+ *        maximum number of chunks and bytes in the raw data chunk cache.
+ *        Once set, these values will override the values in the file access
+ *        property list.  Each of thhese values can be individually unset
+ *        (or not set at all) by passing the macros:
+ *        H5D_CHUNK_CACHE_NCHUNKS_DEFAULT,
+ *        H5D_CHUNK_CACHE_NSLOTS_DEFAULT, and/or
+ *        H5D_CHUNK_CACHE_W0_DEFAULT
+ *        as appropriate.
+ *
+ *        The RDCC_W0 value should be between 0 and 1 inclusive and
+ *        indicates how much chunks that have been fully read or fully
+ *        written are favored for preemption.  A value of zero means
+ *        fully read or written chunks are treated no differently than
+ *        other chunks (the preemption is strictly LRU) while a value
+ *        of one means fully read chunks are always preempted before
+ *        other chunks.
+ *
+ * Return:    Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -550,23 +805,17 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_chunk_cache
- *
- * Purpose:	Retrieves the maximum possible number of elements in the meta
- *		data cache and the maximum possible number of elements and
- *		bytes and the RDCC_W0 value in the raw data chunk cache.  Any
- *		(or all) arguments may be null pointers in which case the
- *		corresponding datum is not returned.  If these properties have
- *      not been set on this property list, the default values for a
- *      file access property list are returned.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5Pget_chunk_cache
  *
- * Programmer:	Neil Fortner
- *              Monday, October 27, 2008
- *
- * Modifications:
+ * Purpose:  Retrieves the maximum possible number of elements in the meta
+ *        data cache and the maximum possible number of elements and
+ *        bytes and the RDCC_W0 value in the raw data chunk cache.  Any
+ *        (or all) arguments may be null pointers in which case the
+ *        corresponding datum is not returned.  If these properties have
+ *        not been set on this property list, the default values for a
+ *        file access property list are returned.
  *
+ * Return:  Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -627,10 +876,6 @@ done:
  *
  * Return:         Success:     Non-negative
  *                 Failure:     Negative
- *
- * Programmer:     Neil Fortner
- *                 Wednesday, January 23, 2013
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -686,10 +931,6 @@ H5P__encode_chunk_cache_nslots(const void *value, void **_pp, size_t *size)
  *
  * Return:         Success:     Non-negative
  *                 Failure:     Negative
- *
- * Programmer:     Neil Fortner
- *                 Wednesday, January 23, 2013
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -737,10 +978,6 @@ H5P__decode_chunk_cache_nslots(const void **_pp, void *_value)
  *
  * Return:         Success:     Non-negative
  *                 Failure:     Negative
- *
- * Programmer:     Neil Fortner
- *                 Wednesday, January 23, 2013
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -796,10 +1033,6 @@ H5P__encode_chunk_cache_nbytes(const void *value, void **_pp, size_t *size)
  *
  * Return:         Success:     Non-negative
  *                 Failure:     Negative
- *
- * Programmer:     Neil Fortner
- *                 Wednesday, January 23, 2013
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -851,10 +1084,6 @@ H5P__decode_chunk_cache_nbytes(const void **_pp, void *_value)
  *              view defines the extent.
  *
  * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Neil Fortner
- *              May 4, 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -889,13 +1118,9 @@ done:
  * Purpose:     Takes the access property list for the virtual dataset,
  *              dapl_id, and gets the flag, view, set by the
  *              H5Pset_virtual_view call.  The possible values of view are
- *              H5D_VDS_FIRST_MISSING or H5D_VDS_LAST_AVAIALBLE. 
+ *              H5D_VDS_FIRST_MISSING or H5D_VDS_LAST_AVAIALBLE.
  *
  * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Neil Fortner
- *              May 4, 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -929,10 +1154,6 @@ done:
  *
  * Return:      Success:        Non-negative
  *              Failure:        Negative
- *
- * Programmer:  Neil Fortner
- *              Tuesday, May 5, 2015
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -966,10 +1187,6 @@ H5P__dacc_vds_view_enc(const void *value, void **_pp, size_t *size)
  *
  * Return:      Success:        Non-negative
  *              Failure:        Negative
- *
- * Programmer:  Neil Fortner
- *              Tuesday, May 5, 2015
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -1013,10 +1230,6 @@ H5P__dacc_vds_view_dec(const void **_pp, void *_value)
  *              the VDS fill value setting.
  *
  * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Neil Fortner
- *              May 21, 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1055,10 +1268,6 @@ done:
  *              value for gap_size is 0.
  *
  * Return:      Non-negative on success/Negative on failure
- *
- * Programmer:  Neil Fortner
- *              May 21, 2015
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1085,30 +1294,27 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_append_flush
- *
- * Purpose:	Sets the boundary, callback function, and user data in the
- *		property list.
- *		"ndims": number of array elements for boundary
- *		"boundary": used to determine whether the current dimension hits 
- *			  a boundary; if so, invoke the callback function and
- *			  flush the dataset.
- *		"func": the callback function to invoke when the boundary is hit
- *		"udata": the user data to pass as parameter with the callback function
- *	
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Vailin Choi; Dec 2013
- *
+ * Function: H5Pset_append_flush
+ *
+ * Purpose:  Sets the boundary, callback function, and user data in the
+ *           property list.
+ *           "ndims": number of array elements for boundary
+ *           "boundary": used to determine whether the current dimension hits
+ *              a boundary; if so, invoke the callback function and
+ *              flush the dataset.
+ *           "func": the callback function to invoke when the boundary is hit
+ *           "udata": the user data to pass as parameter with the callback function
+ *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Pset_append_flush(hid_t plist_id, unsigned ndims, const hsize_t *boundary, H5D_append_cb_t func, void *udata)
 {
-    H5P_genplist_t *plist;      	/* Property list pointer */
-    H5D_append_flush_t info;            /* Property for append flush parameters */
-    unsigned u;				/* Local index variable */
-    herr_t ret_value = SUCCEED;   	/* Return value */
+    H5P_genplist_t *plist;          /* Property list pointer */
+    H5D_append_flush_t info;        /* Property for append flush parameters */
+    unsigned u;                     /* Local index variable */
+    herr_t ret_value = SUCCEED;     /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE5("e", "iIu*hx*x", plist_id, ndims, boundary, func, udata);
@@ -1125,7 +1331,7 @@ H5Pset_append_flush(hid_t plist_id, unsigned ndims, const hsize_t *boundary, H5D
      * This is almost certainly an error as the user data will not be used. */
     if(!func && udata)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "callback is NULL while user data is not")
- 
+
     /* Get the plist structure */
     if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
@@ -1153,18 +1359,15 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_append_flush()
+ * Function: H5Pget_append_flush()
  *
- * Purpose:	Retrieves the boundary, callback function and user data set in 
- *		property list.
- *		Note that the # of boundary sizes to retrieve will not exceed
- *		the parameter "ndims" and the ndims set previously via 
- *		H5Pset_append_flush().
- *	
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Vailin Choi; Dec 2013
+ * Purpose:  Retrieves the boundary, callback function and user data set in
+ *           property list.
+ *           Note that the # of boundary sizes to retrieve will not exceed
+ *           the parameter "ndims" and the ndims set previously via
+ *           H5Pset_append_flush().
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1172,7 +1375,7 @@ H5Pget_append_flush(hid_t plist_id, unsigned ndims, hsize_t boundary[], H5D_appe
 {
     H5P_genplist_t *plist;      /* property list pointer */
     H5D_append_flush_t  info;
-    unsigned u;			/* local index variable */
+    unsigned u;                 /* local index variable */
     herr_t ret_value = SUCCEED; /* return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1188,15 +1391,15 @@ H5Pget_append_flush(hid_t plist_id, unsigned ndims, hsize_t boundary[], H5D_appe
 
     /* Assign return values */
     if(boundary) {
-	HDmemset(boundary, 0, ndims * sizeof(hsize_t));
-	if(info.ndims > 0)
-	    for(u = 0; u < info.ndims && u < ndims; u++)
-		boundary[u] = info.boundary[u];
+        HDmemset(boundary, 0, ndims * sizeof(hsize_t));
+        if(info.ndims > 0)
+            for(u = 0; u < info.ndims && u < ndims; u++)
+                boundary[u] = info.boundary[u];
     } /* end if */
     if(func)
-	*func = info.func;
+        *func = info.func;
     if(udata)
-	*udata = info.udata;
+        *udata = info.udata;
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1217,8 +1420,7 @@ done:
  *              This property can be overwritten by the environment variable
  *              HDF5_EXTFILE_PREFIX.
  *
- * Return:	Non-negative on success/Negative on failure
- *
+ * Return:      Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1244,24 +1446,22 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5Pget_efile_prefix
+ * Function: H5Pget_efile_prefix
  *
- * Purpose:	Gets the prefix to be used for any external files.
- *
- *              If the pointer is not NULL, it points to a user-allocated
- *              buffer.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:  Gets the prefix to be used for any external files.
+ *           If the pointer is not NULL, it points to a user-allocated
+ *           buffer.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 ssize_t
 H5Pget_efile_prefix(hid_t plist_id, char *prefix, size_t size)
 {
     H5P_genplist_t *plist;              /* Property list pointer */
-    char *my_prefix;                    /* Library's copy of the prefix */
-    size_t	len;                    /* Length of prefix string */
-    ssize_t 	ret_value;              /* Return value */
+    char           *my_prefix;          /* Library's copy of the prefix */
+    size_t          len;                /* Length of prefix string */
+    ssize_t         ret_value;          /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE3("Zs", "i*sz", plist_id, prefix, size);
@@ -1294,3 +1494,95 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_efile_prefix() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Pset_virtual_prefix
+ *
+ * Purpose:     Set a prefix to be applied to the path of any vds files
+ *              traversed.
+  *
+ *              If the prefix starts with ${ORIGIN}, this will be replaced by
+ *              the absolute path of the directory of the HDF5 file containing
+ *              the dataset.
+ *
+ *              If the prefix is ".", no prefix will be applied.
+ *
+ *              This property can be overwritten by the environment variable
+ *              HDF5_VDS_PREFIX.
+ *
+ * Return:    Non-negative on success/Negative on failure
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Pset_virtual_prefix(hid_t plist_id, const char *prefix)
+{
+    H5P_genplist_t *plist;              /* Property list pointer */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE2("e", "i*s", plist_id, prefix);
+
+    /* Get the plist structure */
+    if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
+
+    /* Set prefix */
+    if(H5P_set(plist, H5D_ACS_VDS_PREFIX_NAME, &prefix) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set prefix info")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5Pset_virtual_prefix() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Pget_virtual_prefix
+ *
+ * Purpose:    Gets the prefix to be applied to any vds file
+ *              traversals made using this property list.
+ *
+ *              If the pointer is not NULL, it points to a user-allocated
+ *              buffer.
+ *
+ * Return:    Non-negative on success/Negative on failure
+ *-------------------------------------------------------------------------
+ */
+ssize_t
+H5Pget_virtual_prefix(hid_t plist_id, char *prefix, size_t size)
+{
+    H5P_genplist_t *plist;              /* Property list pointer */
+    char           *my_prefix;          /* Library's copy of the prefix */
+    size_t          len;                /* Length of prefix string */
+    ssize_t         ret_value;          /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE3("Zs", "i*sz", plist_id, prefix, size);
+
+    /* Get the plist structure */
+    if(NULL == (plist = H5P_object_verify(plist_id, H5P_DATASET_ACCESS)))
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
+
+    /* Get the current prefix */
+    if(H5P_peek(plist, H5D_ACS_VDS_PREFIX_NAME, &my_prefix) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get vds file prefix")
+
+    /* Check for prefix being set */
+    if(my_prefix) {
+        /* Copy to user's buffer, if given */
+        len = HDstrlen(my_prefix);
+        if(prefix) {
+            HDstrncpy(prefix, my_prefix, MIN(len + 1, size));
+            if(len >= size)
+                prefix[size - 1] = '\0';
+        } /* end if */
+    } /* end if */
+    else
+        len = 0;
+
+    /* Set return value */
+    ret_value = (ssize_t)len;
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5Pget_virtual_prefix() */
+
diff --git a/src/H5Pdcpl.c b/src/H5Pdcpl.c
index 40d30d6..d69b063 100644
--- a/src/H5Pdcpl.c
+++ b/src/H5Pdcpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -36,6 +34,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dpkg.h"		/* Datasets 				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free Lists                           */
@@ -1117,7 +1116,7 @@ H5P__dcrt_fill_value_dec(const void **_pp, void *_value)
         dt_size = (size_t)enc_value;
 
         /* Decode type */
-        if(NULL == (fill->type = H5T_decode(*pp)))
+        if(NULL == (fill->type = H5T_decode(dt_size, *pp)))
             HGOTO_ERROR(H5E_PLIST, H5E_CANTDECODE, FAIL, "can't decode fill value datatype")
         *pp += dt_size;
     } /* end if */
@@ -3219,7 +3218,7 @@ H5Pset_fill_value(hid_t plist_id, hid_t type_id, const void *value)
         HDmemcpy(fill.buf, value, (size_t)fill.size);
 
         /* Set up type conversion function */
-        if(NULL == (tpath = H5T_path_find(type, type, NULL, NULL, H5AC_ind_read_dxpl_id, FALSE)))
+        if(NULL == (tpath = H5T_path_find(type, type)))
             HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest data types")
 
         /* If necessary, convert fill value datatypes (which copies VL components, etc.) */
@@ -3231,7 +3230,7 @@ H5Pset_fill_value(hid_t plist_id, hid_t type_id, const void *value)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
             /* Convert the fill value */
-            if(H5T_convert(tpath, type_id, type_id, (size_t)1, (size_t)0, (size_t)0, fill.buf, bkg_buf, H5AC_ind_read_dxpl_id) < 0) {
+            if(H5T_convert(tpath, type_id, type_id, (size_t)1, (size_t)0, (size_t)0, fill.buf, bkg_buf) < 0) {
                 if(bkg_buf)
                     bkg_buf = H5FL_BLK_FREE(type_conv, bkg_buf);
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCONVERT, FAIL, "datatype conversion failed")
@@ -3271,8 +3270,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5P_get_fill_value(H5P_genplist_t *plist, const H5T_t *type, void *value/*out*/,
-    hid_t dxpl_id)
+H5P_get_fill_value(H5P_genplist_t *plist, const H5T_t *type, void *value/*out*/)
 {
     H5O_fill_t          fill;                   /* Fill value to retrieve */
     H5T_path_t		*tpath;		        /*type conversion info	*/
@@ -3304,7 +3302,7 @@ H5P_get_fill_value(H5P_genplist_t *plist, const H5T_t *type, void *value/*out*/,
      /*
       * Can we convert between the source and destination datatypes?
       */
-    if(NULL == (tpath = H5T_path_find(fill.type, type, NULL, NULL, dxpl_id, FALSE)))
+    if(NULL == (tpath = H5T_path_find(fill.type, type)))
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "unable to convert between src and dst datatypes")
     if((src_id = H5I_register(H5I_DATATYPE, H5T_copy(fill.type, H5T_COPY_TRANSIENT), FALSE)) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "unable to copy/register datatype")
@@ -3330,7 +3328,7 @@ H5P_get_fill_value(H5P_genplist_t *plist, const H5T_t *type, void *value/*out*/,
     /* Do the conversion */
     if((dst_id = H5I_register(H5I_DATATYPE, H5T_copy(type, H5T_COPY_TRANSIENT), FALSE)) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "unable to copy/register datatype")
-    if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, buf, bkg, dxpl_id) < 0)
+    if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, buf, bkg) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "datatype conversion failed")
     if(buf != value)
         HDmemcpy(value, buf, H5T_get_size(type));
@@ -3386,7 +3384,7 @@ H5Pget_fill_value(hid_t plist_id, hid_t type_id, void *value/*out*/)
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
     /* Get the fill value */
-    if(H5P_get_fill_value(plist, type, value, H5AC_ind_read_dxpl_id) < 0)
+    if(H5P_get_fill_value(plist, type, value) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get fill value")
 
 done:
diff --git a/src/H5Pdeprec.c b/src/H5Pdeprec.c
index d225dfa..7f96333 100644
--- a/src/H5Pdeprec.c
+++ b/src/H5Pdeprec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Pdxpl.c b/src/H5Pdxpl.c
index 4a3eb72..e33e762 100644
--- a/src/H5Pdxpl.c
+++ b/src/H5Pdxpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -131,14 +129,6 @@
 /* Definitions for cause of broken collective io property */
 #define H5D_MPIO_NO_COLLECTIVE_CAUSE_SIZE   sizeof(uint32_t)
 #define H5D_MPIO_NO_COLLECTIVE_CAUSE_DEF   H5D_MPIO_COLLECTIVE 
-#ifdef H5_HAVE_PARALLEL
-/* Definitions for memory MPI type property */
-#define H5FD_MPI_XFER_MEM_MPI_TYPE_SIZE        sizeof(MPI_Datatype)
-#define H5FD_MPI_XFER_MEM_MPI_TYPE_DEF         MPI_DATATYPE_NULL
-/* Definitions for file MPI type property */
-#define H5FD_MPI_XFER_FILE_MPI_TYPE_SIZE       sizeof(MPI_Datatype)
-#define H5FD_MPI_XFER_FILE_MPI_TYPE_DEF        MPI_DATATYPE_NULL
-#endif /* H5_HAVE_PARALLEL */
 
 /* Definitions for EDC property */
 #define H5D_XFER_EDC_SIZE           sizeof(H5Z_EDC_t)
@@ -171,22 +161,13 @@
 #define H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_DEF		NULL
 #define H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_SIZE	sizeof(uint32_t)
 #define H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_DEF	0
-/* Ring type - private property */
-#define H5AC_XFER_RING_SIZE      sizeof(unsigned)
-#define H5AC_XFER_RING_DEF       H5AC_RING_USER
-#define H5AC_XFER_RING_ENC       H5P__encode_unsigned
-#define H5AC_XFER_RING_DEC       H5P__decode_unsigned
-#ifdef H5_DEBUG_BUILD
-/* dxpl I/O type - private property */
-#define H5FD_DXPL_TYPE_SIZE       sizeof(H5FD_dxpl_type_t)
-#endif /* H5_DEBUG_BUILD */
-#ifdef H5_HAVE_PARALLEL
-/* Definition for reading metadata collectively */
-#define H5D_XFER_COLL_MD_READ_SIZE   sizeof(H5P_coll_md_read_flag_t)
-#define H5D_XFER_COLL_MD_READ_DEF    H5P_USER_FALSE
-#define H5D_XFER_COLL_MD_READ_ENC    H5P__encode_coll_md_read_flag_t
-#define H5D_XFER_COLL_MD_READ_DEC    H5P__decode_coll_md_read_flag_t
-#endif /* H5_HAVE_PARALLEL */
+/* Definitions for properties of direct chunk read */
+#define H5D_XFER_DIRECT_CHUNK_READ_FLAG_SIZE        sizeof(hbool_t)
+#define H5D_XFER_DIRECT_CHUNK_READ_FLAG_DEF         FALSE
+#define H5D_XFER_DIRECT_CHUNK_READ_FILTERS_SIZE     sizeof(uint32_t)
+#define H5D_XFER_DIRECT_CHUNK_READ_FILTERS_DEF      0
+#define H5D_XFER_DIRECT_CHUNK_READ_OFFSET_SIZE      sizeof(hsize_t *)
+#define H5D_XFER_DIRECT_CHUNK_READ_OFFSET_DEF       NULL
 
 
 /******************/
@@ -273,7 +254,6 @@ static const void *H5D_def_vlen_alloc_info_g = H5D_XFER_VLEN_ALLOC_INFO_DEF;   /
 static const H5MM_free_t H5D_def_vlen_free_g = H5D_XFER_VLEN_FREE_DEF;         /* Default value for vlen free function */
 static const void *H5D_def_vlen_free_info_g = H5D_XFER_VLEN_FREE_INFO_DEF;     /* Default value for vlen free information */
 static const size_t H5D_def_hyp_vec_size_g = H5D_XFER_HYPER_VECTOR_SIZE_DEF;   /* Default value for vector size */
-static const haddr_t H5D_def_tag_g = H5AC_TAG_DEF;                              /* Default value for cache entry tag */
 static const H5FD_mpio_xfer_t H5D_def_io_xfer_mode_g = H5D_XFER_IO_XFER_MODE_DEF;      /* Default value for I/O transfer mode */
 static const H5FD_mpio_chunk_opt_t H5D_def_mpio_chunk_opt_mode_g = H5D_XFER_MPIO_CHUNK_OPT_HARD_DEF;
 static const H5FD_mpio_collective_opt_t H5D_def_mpio_collective_opt_mode_g = H5D_XFER_MPIO_COLLECTIVE_OPT_DEF;
@@ -282,11 +262,6 @@ static const unsigned H5D_def_mpio_chunk_opt_ratio_g = H5D_XFER_MPIO_CHUNK_OPT_R
 static const H5D_mpio_actual_chunk_opt_mode_t H5D_def_mpio_actual_chunk_opt_mode_g = H5D_MPIO_ACTUAL_CHUNK_OPT_MODE_DEF;
 static const H5D_mpio_actual_io_mode_t H5D_def_mpio_actual_io_mode_g = H5D_MPIO_ACTUAL_IO_MODE_DEF;
 static const H5D_mpio_no_collective_cause_t H5D_def_mpio_no_collective_cause_g = H5D_MPIO_NO_COLLECTIVE_CAUSE_DEF; 
-#ifdef H5_HAVE_PARALLEL
-static const MPI_Datatype H5D_def_btype_g = H5FD_MPI_XFER_MEM_MPI_TYPE_DEF;  /* Default value for MPI buffer type */
-static const MPI_Datatype H5D_def_ftype_g = H5FD_MPI_XFER_FILE_MPI_TYPE_DEF; /* Default value for MPI file type */
-static const H5P_coll_md_read_flag_t H5D_def_coll_md_read_g = H5D_XFER_COLL_MD_READ_DEF;  /* Default setting for the collective metedata read flag */
-#endif /* H5_HAVE_PARALLEL */
 static const H5Z_EDC_t H5D_def_enable_edc_g = H5D_XFER_EDC_DEF;            /* Default value for EDC property */
 static const H5Z_cb_t H5D_def_filter_cb_g = H5D_XFER_FILTER_CB_DEF;        /* Default value for filter callback */
 static const H5T_conv_cb_t H5D_def_conv_cb_g = H5D_XFER_CONV_CB_DEF;       /* Default value for datatype conversion callback */
@@ -295,10 +270,9 @@ static const hbool_t H5D_def_direct_chunk_flag_g = H5D_XFER_DIRECT_CHUNK_WRITE_F
 static const uint32_t H5D_def_direct_chunk_filters_g = H5D_XFER_DIRECT_CHUNK_WRITE_FILTERS_DEF;	/* Default value for the filters of direct chunk write */
 static const hsize_t *H5D_def_direct_chunk_offset_g = H5D_XFER_DIRECT_CHUNK_WRITE_OFFSET_DEF; 	/* Default value for the offset of direct chunk write */
 static const uint32_t H5D_def_direct_chunk_datasize_g = H5D_XFER_DIRECT_CHUNK_WRITE_DATASIZE_DEF; /* Default value for the datasize of direct chunk write */
-static const H5AC_ring_t H5D_ring_g = H5AC_XFER_RING_DEF; /* Default value for the cache entry ring type */
-#ifdef H5_DEBUG_BUILD
-static const H5FD_dxpl_type_t H5D_dxpl_type_g = H5FD_NOIO_DXPL; /* Default value for the dxpl type */
-#endif /* H5_DEBUG_BUILD */
+static const hbool_t direct_chunk_read_flag = H5D_XFER_DIRECT_CHUNK_READ_FLAG_DEF;         /* Default value for the flag of direct chunk read */
+static const hsize_t *direct_chunk_read_offset = H5D_XFER_DIRECT_CHUNK_READ_OFFSET_DEF;    /* Default value for the offset of direct chunk read */
+static const uint32_t direct_chunk_read_filters = H5D_XFER_DIRECT_CHUNK_READ_FILTERS_DEF;    /* Default value for the filters of direct chunk read */
 
 
 /*-------------------------------------------------------------------------
@@ -325,11 +299,6 @@ H5P__dxfr_reg_prop(H5P_genclass_t *pclass)
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
-    /* Register the cache tag property */
-    if(H5P_register_real(pclass, H5AC_TAG_NAME, H5AC_TAG_SIZE, &H5D_def_tag_g,
-            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
-
     /* Register the type conversion buffer property */
     /* (Note: this property should not have an encode/decode callback -QAK) */
     if(H5P_register_real(pclass, H5D_XFER_TCONV_BUF_NAME, H5D_XFER_TCONV_BUF_SIZE, &H5D_def_tconv_buf_g, 
@@ -430,27 +399,6 @@ H5P__dxfr_reg_prop(H5P_genclass_t *pclass)
             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
-#ifdef H5_HAVE_PARALLEL
-    /* Register the MPI memory type property */
-    /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5FD_MPI_XFER_MEM_MPI_TYPE_NAME, H5FD_MPI_XFER_MEM_MPI_TYPE_SIZE, &H5D_def_btype_g,
-            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
-
-    /* Register the MPI file type property */
-    /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5FD_MPI_XFER_FILE_MPI_TYPE_NAME, H5FD_MPI_XFER_FILE_MPI_TYPE_SIZE, &H5D_def_ftype_g,
-            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
-
-    /* Register the metadata collective read flag */
-    if(H5P_register_real(pclass, H5_COLL_MD_READ_FLAG_NAME, H5D_XFER_COLL_MD_READ_SIZE, 
-            &H5D_def_coll_md_read_g, 
-            NULL, NULL, NULL, H5D_XFER_COLL_MD_READ_ENC, H5D_XFER_COLL_MD_READ_DEC, 
-            NULL, NULL, NULL, NULL) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
-#endif /* H5_HAVE_PARALLEL */
-
     /* Register the EDC property */
     if(H5P_register_real(pclass, H5D_XFER_EDC_NAME, H5D_XFER_EDC_SIZE, &H5D_def_enable_edc_g,
             NULL, NULL, NULL, H5D_XFER_EDC_ENC, H5D_XFER_EDC_DEC,
@@ -499,18 +447,23 @@ H5P__dxfr_reg_prop(H5P_genclass_t *pclass)
             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
-    /* Register the ring property (private) */
-    if(H5P_register_real(pclass, H5AC_RING_NAME, H5AC_XFER_RING_SIZE, &H5D_ring_g,
-            NULL, NULL, NULL, H5AC_XFER_RING_ENC, H5AC_XFER_RING_DEC, 
-            NULL, NULL, NULL, NULL) < 0)
+    /* Register the property of flag for direct chunk read */
+    /* (Note: this property should not have an encode/decode callback) */
+    if(H5P_register_real(pclass, H5D_XFER_DIRECT_CHUNK_READ_FLAG_NAME, H5D_XFER_DIRECT_CHUNK_READ_FLAG_SIZE, &direct_chunk_read_flag,
+            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
-#ifdef H5_DEBUG_BUILD
-    /* Register the dxpl IO type property */
-    if(H5P_register_real(pclass, H5FD_DXPL_TYPE_NAME, H5FD_DXPL_TYPE_SIZE, &H5D_dxpl_type_g,
-                         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
+    /* Register the property of filter for direct chunk read */
+    /* (Note: this property should not have an encode/decode callback) */
+    if(H5P_register_real(pclass, H5D_XFER_DIRECT_CHUNK_READ_FILTERS_NAME, H5D_XFER_DIRECT_CHUNK_READ_FILTERS_SIZE, &direct_chunk_read_filters,
+            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
+
+    /* Register the property of offset for direct chunk read */
+    /* (Note: this property should not have an encode/decode callback) */
+    if(H5P_register_real(pclass, H5D_XFER_DIRECT_CHUNK_READ_OFFSET_NAME, H5D_XFER_DIRECT_CHUNK_READ_OFFSET_SIZE, &direct_chunk_read_offset,
+            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
-#endif /* H5_DEBUG_BUILD */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Pencdec.c b/src/H5Pencdec.c
index 1bcd19c..73c48d7 100644
--- a/src/H5Pencdec.c
+++ b/src/H5Pencdec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@hdfgroup.org>
diff --git a/src/H5Pfapl.c b/src/H5Pfapl.c
index 7865fdf..eded286 100644
--- a/src/H5Pfapl.c
+++ b/src/H5Pfapl.c
@@ -5,21 +5,17 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
  *
- * Created:		H5Pfapl.c
- *			February 26 1998
- *			Robb Matzke <matzke@llnl.gov>
+ * Created:        H5Pfapl.c
  *
- * Purpose:		File access property list class routines
+ * Purpose:        File access property list class routines
  *
  *-------------------------------------------------------------------------
  */
@@ -34,21 +30,21 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"	/* Metadata cache			*/
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* Files		  	        */
-#include "H5FDprivate.h"	/* File drivers				*/
-#include "H5Iprivate.h"		/* IDs			  		*/
+#include "H5private.h"          /* Generic Functions                    */
+#include "H5ACprivate.h"        /* Metadata cache                       */
+#include "H5Dprivate.h"         /* Datasets                             */
+#include "H5Eprivate.h"         /* Error handling                       */
+#include "H5Fprivate.h"         /* Files                                */
+#include "H5FDprivate.h"        /* File drivers                         */
+#include "H5Iprivate.h"         /* IDs                                  */
 #include "H5MMprivate.h"        /* Memory Management                    */
-#include "H5Ppkg.h"		/* Property lists		  	*/
+#include "H5Ppkg.h"             /* Property lists                       */
 
 /* Includes needed to set as default file driver */
-#include "H5FDsec2.h"		/* Posix unbuffered I/O	file driver	*/
-#include "H5FDstdio.h"		/* Standard C buffered I/O		*/
+#include "H5FDsec2.h"           /* Posix unbuffered I/O    file driver     */
+#include "H5FDstdio.h"          /* Standard C buffered I/O              */
 #ifdef H5_HAVE_WINDOWS
-#include "H5FDwindows.h"        /* Windows buffered I/O                 */
+#include "H5FDwindows.h"        /* Win32 I/O                            */
 #endif
 
 
@@ -58,10 +54,10 @@
 
 /* ========= File Access properties ============ */
 /* Definitions for the initial metadata cache resize configuration */
-#define H5F_ACS_META_CACHE_INIT_CONFIG_SIZE	sizeof(H5AC_cache_config_t)
-#define H5F_ACS_META_CACHE_INIT_CONFIG_DEF	H5AC__DEFAULT_CACHE_CONFIG
-#define H5F_ACS_META_CACHE_INIT_CONFIG_ENC	H5P__facc_cache_config_enc
-#define H5F_ACS_META_CACHE_INIT_CONFIG_DEC	H5P__facc_cache_config_dec
+#define H5F_ACS_META_CACHE_INIT_CONFIG_SIZE    sizeof(H5AC_cache_config_t)
+#define H5F_ACS_META_CACHE_INIT_CONFIG_DEF    H5AC__DEFAULT_CACHE_CONFIG
+#define H5F_ACS_META_CACHE_INIT_CONFIG_ENC    H5P__facc_cache_config_enc
+#define H5F_ACS_META_CACHE_INIT_CONFIG_DEC    H5P__facc_cache_config_dec
 #define H5F_ACS_META_CACHE_INIT_CONFIG_CMP      H5P__facc_cache_config_cmp
 /* Definitions for size of raw data chunk cache(slots) */
 #define H5F_ACS_DATA_CACHE_NUM_SLOTS_SIZE       sizeof(size_t)
@@ -122,10 +118,10 @@
 #define H5F_ACS_FILE_DRV_CMP                    H5P__facc_file_driver_cmp
 #define H5F_ACS_FILE_DRV_CLOSE                  H5P__facc_file_driver_close
 /* Definition for file close degree */
-#define H5F_CLOSE_DEGREE_SIZE		        sizeof(H5F_close_degree_t)
-#define H5F_CLOSE_DEGREE_DEF		        H5F_CLOSE_DEFAULT
-#define H5F_CLOSE_DEGREE_ENC		        H5P__facc_fclose_degree_enc
-#define H5F_CLOSE_DEGREE_DEC		        H5P__facc_fclose_degree_dec
+#define H5F_CLOSE_DEGREE_SIZE                sizeof(H5F_close_degree_t)
+#define H5F_CLOSE_DEGREE_DEF                H5F_CLOSE_DEFAULT
+#define H5F_CLOSE_DEGREE_ENC                H5P__facc_fclose_degree_enc
+#define H5F_CLOSE_DEGREE_DEC                H5P__facc_fclose_degree_dec
 /* Definition for offset position in file for family file driver */
 #define H5F_ACS_FAMILY_OFFSET_SIZE              sizeof(hsize_t)
 #define H5F_ACS_FAMILY_OFFSET_DEF               0
@@ -144,11 +140,19 @@
 #define H5F_ACS_MULTI_TYPE_DEF                  H5FD_MEM_DEFAULT
 #define H5F_ACS_MULTI_TYPE_ENC                  H5P__facc_multi_type_enc
 #define H5F_ACS_MULTI_TYPE_DEC                  H5P__facc_multi_type_dec
-/* Definition for 'use latest format version' flag */
-#define H5F_ACS_LATEST_FORMAT_SIZE              sizeof(hbool_t)
-#define H5F_ACS_LATEST_FORMAT_DEF               FALSE
-#define H5F_ACS_LATEST_FORMAT_ENC               H5P__encode_hbool_t
-#define H5F_ACS_LATEST_FORMAT_DEC               H5P__decode_hbool_t
+
+/* Definition for "low" bound of library format versions */
+#define H5F_ACS_LIBVER_LOW_BOUND_SIZE       sizeof(H5F_libver_t)
+#define H5F_ACS_LIBVER_LOW_BOUND_DEF        H5F_LIBVER_EARLIEST
+#define H5F_ACS_LIBVER_LOW_BOUND_ENC        H5P__facc_libver_type_enc
+#define H5F_ACS_LIBVER_LOW_BOUND_DEC        H5P__facc_libver_type_dec
+
+/* Definition for "high" bound of library format versions */
+#define H5F_ACS_LIBVER_HIGH_BOUND_SIZE      sizeof(H5F_libver_t)
+#define H5F_ACS_LIBVER_HIGH_BOUND_DEF       H5F_LIBVER_LATEST
+#define H5F_ACS_LIBVER_HIGH_BOUND_ENC       H5P__facc_libver_type_enc
+#define H5F_ACS_LIBVER_HIGH_BOUND_DEC       H5P__facc_libver_type_dec
+
 /* Definition for whether to query the file descriptor from the core VFD
  * instead of the memory address.  (Private to library)
  */
@@ -179,16 +183,24 @@
 #define H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_ENC       H5P__encode_size_t
 #define H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_DEC       H5P__decode_size_t
 /* Definition for # of metadata read attempts */
-#define H5F_ACS_METADATA_READ_ATTEMPTS_SIZE	sizeof(unsigned)
-#define H5F_ACS_METADATA_READ_ATTEMPTS_DEF     	0
-#define H5F_ACS_METADATA_READ_ATTEMPTS_ENC     	H5P__encode_unsigned
-#define H5F_ACS_METADATA_READ_ATTEMPTS_DEC     	H5P__decode_unsigned
+#define H5F_ACS_METADATA_READ_ATTEMPTS_SIZE    sizeof(unsigned)
+#define H5F_ACS_METADATA_READ_ATTEMPTS_DEF         0
+#define H5F_ACS_METADATA_READ_ATTEMPTS_ENC         H5P__encode_unsigned
+#define H5F_ACS_METADATA_READ_ATTEMPTS_DEC         H5P__decode_unsigned
 /* Definition for object flush callback */
-#define H5F_ACS_OBJECT_FLUSH_CB_SIZE		sizeof(H5F_object_flush_t)
+#define H5F_ACS_OBJECT_FLUSH_CB_SIZE        sizeof(H5F_object_flush_t)
 #define H5F_ACS_OBJECT_FLUSH_CB_DEF             {NULL, NULL}
 /* Definition for status_flags in the superblock */
 #define H5F_ACS_CLEAR_STATUS_FLAGS_SIZE         sizeof(hbool_t)
 #define H5F_ACS_CLEAR_STATUS_FLAGS_DEF          FALSE
+
+/* Definition for dropping free-space to the floor when reading in the superblock */
+#define H5F_ACS_NULL_FSM_ADDR_SIZE          sizeof(hbool_t)
+#define H5F_ACS_NULL_FSM_ADDR_DEF           FALSE
+/* Definition for skipping EOF check when reading in the superblock */
+#define H5F_ACS_SKIP_EOF_CHECK_SIZE         sizeof(hbool_t)
+#define H5F_ACS_SKIP_EOF_CHECK_DEF          FALSE
+
 /* Definition for 'use metadata cache logging' flag */
 #define H5F_ACS_USE_MDC_LOGGING_SIZE            sizeof(hbool_t)
 #define H5F_ACS_USE_MDC_LOGGING_DEF             FALSE
@@ -292,6 +304,8 @@ static herr_t H5P__facc_fclose_degree_enc(const void *value, void **_pp, size_t
 static herr_t H5P__facc_fclose_degree_dec(const void **pp, void *value);
 static herr_t H5P__facc_multi_type_enc(const void *value, void **_pp, size_t *size);
 static herr_t H5P__facc_multi_type_dec(const void **_pp, void *value);
+static herr_t H5P__facc_libver_type_enc(const void *value, void **_pp, size_t *size);
+static herr_t H5P__facc_libver_type_dec(const void **_pp, void *value);
 
 /* Metadata cache log location property callbacks */
 static herr_t H5P_facc_mdc_log_location_enc(const void *value, void **_pp, size_t *size);
@@ -313,21 +327,21 @@ static herr_t H5P__facc_cache_image_config_dec(const void **_pp, void *_value);
 
 /* File access property list class library initialization object */
 const H5P_libclass_t H5P_CLS_FACC[1] = {{
-    "file access",		/* Class name for debugging     */
+    "file access",        /* Class name for debugging     */
     H5P_TYPE_FILE_ACCESS,       /* Class type                   */
 
-    &H5P_CLS_ROOT_g,		/* Parent class                 */
-    &H5P_CLS_FILE_ACCESS_g,	/* Pointer to class             */
-    &H5P_CLS_FILE_ACCESS_ID_g,	/* Pointer to class ID          */
-    &H5P_LST_FILE_ACCESS_ID_g,	/* Pointer to default property list ID */
-    H5P__facc_reg_prop,		/* Default property registration routine */
-
-    NULL,			/* Class creation callback      */
-    NULL,		        /* Class creation callback info */
-    NULL,			/* Class copy callback          */
-    NULL,		        /* Class copy callback info     */
-    NULL,			/* Class close callback         */
-    NULL 		        /* Class close callback info    */
+    &H5P_CLS_ROOT_g,        /* Parent class                 */
+    &H5P_CLS_FILE_ACCESS_g,    /* Pointer to class             */
+    &H5P_CLS_FILE_ACCESS_ID_g,    /* Pointer to class ID          */
+    &H5P_LST_FILE_ACCESS_ID_g,    /* Pointer to default property list ID */
+    H5P__facc_reg_prop,        /* Default property registration routine */
+
+    NULL,            /* Class creation callback      */
+    NULL,                /* Class creation callback info */
+    NULL,            /* Class copy callback          */
+    NULL,                /* Class copy callback info     */
+    NULL,            /* Class close callback         */
+    NULL                 /* Class close callback info    */
 }};
 
 
@@ -356,7 +370,10 @@ static const hsize_t H5F_def_family_offset_g = H5F_ACS_FAMILY_OFFSET_DEF;
 static const hsize_t H5F_def_family_newsize_g = H5F_ACS_FAMILY_NEWSIZE_DEF;        /* Default size of new files for family VFD */
 static const hbool_t H5F_def_family_to_sec2_g = H5F_ACS_FAMILY_TO_SEC2_DEF;        /* Default ?? for family VFD */
 static const H5FD_mem_t H5F_def_mem_type_g = H5F_ACS_MULTI_TYPE_DEF;               /* Default file space type for multi VFD */
-static const hbool_t H5F_def_latest_format_g = H5F_ACS_LATEST_FORMAT_DEF;          /* Default setting for "use the latest version of the format" flag */
+
+static const H5F_libver_t H5F_def_libver_low_bound_g = H5F_ACS_LIBVER_LOW_BOUND_DEF;    /* Default setting for "low" bound of format version */
+static const H5F_libver_t H5F_def_libver_high_bound_g = H5F_ACS_LIBVER_HIGH_BOUND_DEF;  /* Default setting for "high" bound of format version */
+
 static const hbool_t H5F_def_want_posix_fd_g = H5F_ACS_WANT_POSIX_FD_DEF;          /* Default setting for retrieving 'handle' from core VFD */
 static const unsigned H5F_def_efc_size_g = H5F_ACS_EFC_SIZE_DEF;                   /* Default external file cache size */
 static const H5FD_file_image_info_t H5F_def_file_image_info_g = H5F_ACS_FILE_IMAGE_INFO_DEF;                 /* Default file image info and callbacks */
@@ -365,6 +382,9 @@ static const size_t H5F_def_core_write_tracking_page_size_g = H5F_ACS_CORE_WRITE
 static const unsigned H5F_def_metadata_read_attempts_g = H5F_ACS_METADATA_READ_ATTEMPTS_DEF;  /* Default setting for the # of metadata read attempts */
 static const H5F_object_flush_t H5F_def_object_flush_cb_g = H5F_ACS_OBJECT_FLUSH_CB_DEF;      /* Default setting for object flush callback */
 static const hbool_t H5F_def_clear_status_flags_g = H5F_ACS_CLEAR_STATUS_FLAGS_DEF;           /* Default to clear the superblock status_flags */
+static const hbool_t H5F_def_skip_eof_check_g = H5F_ACS_SKIP_EOF_CHECK_DEF;    /* Default setting for skipping EOF check */
+static const hbool_t H5F_def_null_fsm_addr_g = H5F_ACS_NULL_FSM_ADDR_DEF;      /* Default setting for dropping free-space to the floor */
+
 static const hbool_t H5F_def_use_mdc_logging_g = H5F_ACS_USE_MDC_LOGGING_DEF;                 /* Default metadata cache logging flag */
 static const char *H5F_def_mdc_log_location_g = H5F_ACS_MDC_LOG_LOCATION_DEF;                 /* Default mdc log location */
 static const hbool_t H5F_def_start_mdc_log_on_access_g = H5F_ACS_START_MDC_LOG_ON_ACCESS_DEF; /* Default mdc log start on access flag */
@@ -378,7 +398,7 @@ static const size_t H5F_def_page_buf_size_g = H5F_ACS_PAGE_BUFFER_SIZE_DEF;
 static const unsigned H5F_def_page_buf_min_meta_perc_g = H5F_ACS_PAGE_BUFFER_MIN_META_PERC_DEF;      /* Default page buffer minimum metadata size */
 static const unsigned H5F_def_page_buf_min_raw_perc_g = H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_DEF;      /* Default page buffer minumum raw data size */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_reg_prop
  *
@@ -393,155 +413,161 @@ static const unsigned H5F_def_page_buf_min_raw_perc_g = H5F_ACS_PAGE_BUFFER_MIN_
 static herr_t
 H5P__facc_reg_prop(H5P_genclass_t *pclass)
 {
-    const H5FD_driver_prop_t def_driver_prop = H5F_ACS_FILE_DRV_DEF;           /* Default VFL driver ID & info (initialized from a variable) */
-    herr_t ret_value = SUCCEED;         /* Return value */
+    const H5FD_driver_prop_t def_driver_prop    = H5F_ACS_FILE_DRV_DEF;     /* Default VFL driver ID & info (initialized from a variable) */
+    herr_t ret_value = SUCCEED;                                             /* Return value */
 
     FUNC_ENTER_STATIC
 
     /* Register the initial metadata cache resize configuration */
-    if(H5P_register_real(pclass, H5F_ACS_META_CACHE_INIT_CONFIG_NAME, H5F_ACS_META_CACHE_INIT_CONFIG_SIZE, &H5F_def_mdc_initCacheCfg_g, 
-            NULL, NULL, NULL, H5F_ACS_META_CACHE_INIT_CONFIG_ENC, H5F_ACS_META_CACHE_INIT_CONFIG_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_META_CACHE_INIT_CONFIG_NAME, H5F_ACS_META_CACHE_INIT_CONFIG_SIZE, &H5F_def_mdc_initCacheCfg_g,
+            NULL, NULL, NULL, H5F_ACS_META_CACHE_INIT_CONFIG_ENC, H5F_ACS_META_CACHE_INIT_CONFIG_DEC,
             NULL, NULL, H5F_ACS_META_CACHE_INIT_CONFIG_CMP, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the size of raw data chunk cache (elements) */
-    if(H5P_register_real(pclass, H5F_ACS_DATA_CACHE_NUM_SLOTS_NAME, H5F_ACS_DATA_CACHE_NUM_SLOTS_SIZE, &H5F_def_rdcc_nslots_g, 
-            NULL, NULL, NULL, H5F_ACS_DATA_CACHE_NUM_SLOTS_ENC, H5F_ACS_DATA_CACHE_NUM_SLOTS_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_DATA_CACHE_NUM_SLOTS_NAME, H5F_ACS_DATA_CACHE_NUM_SLOTS_SIZE, &H5F_def_rdcc_nslots_g,
+            NULL, NULL, NULL, H5F_ACS_DATA_CACHE_NUM_SLOTS_ENC, H5F_ACS_DATA_CACHE_NUM_SLOTS_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the size of raw data chunk cache(bytes) */
-    if(H5P_register_real(pclass, H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME, H5F_ACS_DATA_CACHE_BYTE_SIZE_SIZE, &H5F_def_rdcc_nbytes_g, 
-            NULL, NULL, NULL, H5F_ACS_DATA_CACHE_BYTE_SIZE_ENC, H5F_ACS_DATA_CACHE_BYTE_SIZE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_DATA_CACHE_BYTE_SIZE_NAME, H5F_ACS_DATA_CACHE_BYTE_SIZE_SIZE, &H5F_def_rdcc_nbytes_g,
+            NULL, NULL, NULL, H5F_ACS_DATA_CACHE_BYTE_SIZE_ENC, H5F_ACS_DATA_CACHE_BYTE_SIZE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the preemption for reading chunks */
-    if(H5P_register_real(pclass, H5F_ACS_PREEMPT_READ_CHUNKS_NAME, H5F_ACS_PREEMPT_READ_CHUNKS_SIZE, &H5F_def_rdcc_w0_g, 
-            NULL, NULL, NULL, H5F_ACS_PREEMPT_READ_CHUNKS_ENC, H5F_ACS_PREEMPT_READ_CHUNKS_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_PREEMPT_READ_CHUNKS_NAME, H5F_ACS_PREEMPT_READ_CHUNKS_SIZE, &H5F_def_rdcc_w0_g,
+            NULL, NULL, NULL, H5F_ACS_PREEMPT_READ_CHUNKS_ENC, H5F_ACS_PREEMPT_READ_CHUNKS_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the threshold for alignment */
-    if(H5P_register_real(pclass, H5F_ACS_ALIGN_THRHD_NAME, H5F_ACS_ALIGN_THRHD_SIZE, &H5F_def_threshold_g, 
-            NULL, NULL, NULL, H5F_ACS_ALIGN_THRHD_ENC, H5F_ACS_ALIGN_THRHD_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_ALIGN_THRHD_NAME, H5F_ACS_ALIGN_THRHD_SIZE, &H5F_def_threshold_g,
+            NULL, NULL, NULL, H5F_ACS_ALIGN_THRHD_ENC, H5F_ACS_ALIGN_THRHD_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the alignment */
-    if(H5P_register_real(pclass, H5F_ACS_ALIGN_NAME, H5F_ACS_ALIGN_SIZE, &H5F_def_alignment_g, 
-            NULL, NULL, NULL, H5F_ACS_ALIGN_ENC, H5F_ACS_ALIGN_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_ALIGN_NAME, H5F_ACS_ALIGN_SIZE, &H5F_def_alignment_g,
+            NULL, NULL, NULL, H5F_ACS_ALIGN_ENC, H5F_ACS_ALIGN_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the minimum metadata allocation block size */
-    if(H5P_register_real(pclass, H5F_ACS_META_BLOCK_SIZE_NAME, H5F_ACS_META_BLOCK_SIZE_SIZE, &H5F_def_meta_block_size_g, 
-            NULL, NULL, NULL, H5F_ACS_META_BLOCK_SIZE_ENC, H5F_ACS_META_BLOCK_SIZE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_META_BLOCK_SIZE_NAME, H5F_ACS_META_BLOCK_SIZE_SIZE, &H5F_def_meta_block_size_g,
+            NULL, NULL, NULL, H5F_ACS_META_BLOCK_SIZE_ENC, H5F_ACS_META_BLOCK_SIZE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the maximum sieve buffer size */
-    if(H5P_register_real(pclass, H5F_ACS_SIEVE_BUF_SIZE_NAME, H5F_ACS_SIEVE_BUF_SIZE_SIZE, &H5F_def_sieve_buf_size_g, 
-            NULL, NULL, NULL, H5F_ACS_SIEVE_BUF_SIZE_ENC, H5F_ACS_SIEVE_BUF_SIZE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_SIEVE_BUF_SIZE_NAME, H5F_ACS_SIEVE_BUF_SIZE_SIZE, &H5F_def_sieve_buf_size_g,
+            NULL, NULL, NULL, H5F_ACS_SIEVE_BUF_SIZE_ENC, H5F_ACS_SIEVE_BUF_SIZE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the minimum "small data" allocation block size */
-    if(H5P_register_real(pclass, H5F_ACS_SDATA_BLOCK_SIZE_NAME, H5F_ACS_SDATA_BLOCK_SIZE_SIZE, &H5F_def_sdata_block_size_g, 
-            NULL, NULL, NULL, H5F_ACS_SDATA_BLOCK_SIZE_ENC, H5F_ACS_SDATA_BLOCK_SIZE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_SDATA_BLOCK_SIZE_NAME, H5F_ACS_SDATA_BLOCK_SIZE_SIZE, &H5F_def_sdata_block_size_g,
+            NULL, NULL, NULL, H5F_ACS_SDATA_BLOCK_SIZE_ENC, H5F_ACS_SDATA_BLOCK_SIZE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the garbage collection reference */
-    if(H5P_register_real(pclass, H5F_ACS_GARBG_COLCT_REF_NAME, H5F_ACS_GARBG_COLCT_REF_SIZE, &H5F_def_gc_ref_g, 
-            NULL, NULL, NULL, H5F_ACS_GARBG_COLCT_REF_ENC, H5F_ACS_GARBG_COLCT_REF_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_GARBG_COLCT_REF_NAME, H5F_ACS_GARBG_COLCT_REF_SIZE, &H5F_def_gc_ref_g,
+            NULL, NULL, NULL, H5F_ACS_GARBG_COLCT_REF_ENC, H5F_ACS_GARBG_COLCT_REF_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the file driver ID & info */
     /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5F_ACS_FILE_DRV_NAME, H5F_ACS_FILE_DRV_SIZE, &def_driver_prop, 
+    if(H5P_register_real(pclass, H5F_ACS_FILE_DRV_NAME, H5F_ACS_FILE_DRV_SIZE, &def_driver_prop,
             H5F_ACS_FILE_DRV_CRT, H5F_ACS_FILE_DRV_SET, H5F_ACS_FILE_DRV_GET, NULL, NULL,
             H5F_ACS_FILE_DRV_DEL, H5F_ACS_FILE_DRV_COPY, H5F_ACS_FILE_DRV_CMP, H5F_ACS_FILE_DRV_CLOSE) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the file close degree */
-    if(H5P_register_real(pclass, H5F_ACS_CLOSE_DEGREE_NAME, H5F_CLOSE_DEGREE_SIZE, &H5F_def_close_degree_g, 
-            NULL, NULL, NULL, H5F_CLOSE_DEGREE_ENC, H5F_CLOSE_DEGREE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_CLOSE_DEGREE_NAME, H5F_CLOSE_DEGREE_SIZE, &H5F_def_close_degree_g,
+            NULL, NULL, NULL, H5F_CLOSE_DEGREE_ENC, H5F_CLOSE_DEGREE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the offset of family driver info */
-    if(H5P_register_real(pclass, H5F_ACS_FAMILY_OFFSET_NAME, H5F_ACS_FAMILY_OFFSET_SIZE, &H5F_def_family_offset_g, 
-            NULL, NULL, NULL, H5F_ACS_FAMILY_OFFSET_ENC, H5F_ACS_FAMILY_OFFSET_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_FAMILY_OFFSET_NAME, H5F_ACS_FAMILY_OFFSET_SIZE, &H5F_def_family_offset_g,
+            NULL, NULL, NULL, H5F_ACS_FAMILY_OFFSET_ENC, H5F_ACS_FAMILY_OFFSET_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the private property of new family file size. It's used by h5repart only. */
     /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5F_ACS_FAMILY_NEWSIZE_NAME, H5F_ACS_FAMILY_NEWSIZE_SIZE, &H5F_def_family_newsize_g, 
+    if(H5P_register_real(pclass, H5F_ACS_FAMILY_NEWSIZE_NAME, H5F_ACS_FAMILY_NEWSIZE_SIZE, &H5F_def_family_newsize_g,
             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the private property of whether convert family to sec2 driver. It's used by h5repart only. */
     /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5F_ACS_FAMILY_TO_SEC2_NAME, H5F_ACS_FAMILY_TO_SEC2_SIZE, &H5F_def_family_to_sec2_g, 
+    if(H5P_register_real(pclass, H5F_ACS_FAMILY_TO_SEC2_NAME, H5F_ACS_FAMILY_TO_SEC2_SIZE, &H5F_def_family_to_sec2_g,
             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the data type of multi driver info */
-    if(H5P_register_real(pclass, H5F_ACS_MULTI_TYPE_NAME, H5F_ACS_MULTI_TYPE_SIZE, &H5F_def_mem_type_g, 
-            NULL, NULL, NULL, H5F_ACS_MULTI_TYPE_ENC, H5F_ACS_MULTI_TYPE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_MULTI_TYPE_NAME, H5F_ACS_MULTI_TYPE_SIZE, &H5F_def_mem_type_g,
+            NULL, NULL, NULL, H5F_ACS_MULTI_TYPE_ENC, H5F_ACS_MULTI_TYPE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
-    /* Register the 'use the latest version of the format' flag */
-    if(H5P_register_real(pclass, H5F_ACS_LATEST_FORMAT_NAME, H5F_ACS_LATEST_FORMAT_SIZE, &H5F_def_latest_format_g, 
-            NULL, NULL, NULL, H5F_ACS_LATEST_FORMAT_ENC, H5F_ACS_LATEST_FORMAT_DEC, 
+    /* Register the 'low' bound of library format versions */
+    if(H5P_register_real(pclass, H5F_ACS_LIBVER_LOW_BOUND_NAME, H5F_ACS_LIBVER_LOW_BOUND_SIZE, &H5F_def_libver_low_bound_g,
+            NULL, NULL, NULL, H5F_ACS_LIBVER_LOW_BOUND_ENC, H5F_ACS_LIBVER_LOW_BOUND_DEC,
+            NULL, NULL, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
+
+    /* Register the 'high' bound of library format versions */
+    if(H5P_register_real(pclass, H5F_ACS_LIBVER_HIGH_BOUND_NAME, H5F_ACS_LIBVER_HIGH_BOUND_SIZE, &H5F_def_libver_high_bound_g,
+            NULL, NULL, NULL, H5F_ACS_LIBVER_HIGH_BOUND_ENC, H5F_ACS_LIBVER_HIGH_BOUND_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the private property of whether to retrieve the file descriptor from the core VFD */
     /* (used internally to the library only) */
     /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5F_ACS_WANT_POSIX_FD_NAME, H5F_ACS_WANT_POSIX_FD_SIZE, &H5F_def_want_posix_fd_g, 
+    if(H5P_register_real(pclass, H5F_ACS_WANT_POSIX_FD_NAME, H5F_ACS_WANT_POSIX_FD_SIZE, &H5F_def_want_posix_fd_g,
             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the external file cache size */
-    if(H5P_register_real(pclass, H5F_ACS_EFC_SIZE_NAME, H5F_ACS_EFC_SIZE_SIZE, &H5F_def_efc_size_g, 
-            NULL, NULL, NULL, H5F_ACS_EFC_SIZE_ENC, H5F_ACS_EFC_SIZE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_EFC_SIZE_NAME, H5F_ACS_EFC_SIZE_SIZE, &H5F_def_efc_size_g,
+            NULL, NULL, NULL, H5F_ACS_EFC_SIZE_ENC, H5F_ACS_EFC_SIZE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the initial file image info */
     /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5F_ACS_FILE_IMAGE_INFO_NAME, H5F_ACS_FILE_IMAGE_INFO_SIZE, &H5F_def_file_image_info_g, 
+    if(H5P_register_real(pclass, H5F_ACS_FILE_IMAGE_INFO_NAME, H5F_ACS_FILE_IMAGE_INFO_SIZE, &H5F_def_file_image_info_g,
             NULL, H5F_ACS_FILE_IMAGE_INFO_SET, H5F_ACS_FILE_IMAGE_INFO_GET, NULL, NULL,
             H5F_ACS_FILE_IMAGE_INFO_DEL, H5F_ACS_FILE_IMAGE_INFO_COPY, H5F_ACS_FILE_IMAGE_INFO_CMP, H5F_ACS_FILE_IMAGE_INFO_CLOSE) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the core VFD backing store write tracking flag */
-    if(H5P_register_real(pclass, H5F_ACS_CORE_WRITE_TRACKING_FLAG_NAME, H5F_ACS_CORE_WRITE_TRACKING_FLAG_SIZE, &H5F_def_core_write_tracking_flag_g, 
-            NULL, NULL, NULL, H5F_ACS_CORE_WRITE_TRACKING_FLAG_ENC, H5F_ACS_CORE_WRITE_TRACKING_FLAG_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_CORE_WRITE_TRACKING_FLAG_NAME, H5F_ACS_CORE_WRITE_TRACKING_FLAG_SIZE, &H5F_def_core_write_tracking_flag_g,
+            NULL, NULL, NULL, H5F_ACS_CORE_WRITE_TRACKING_FLAG_ENC, H5F_ACS_CORE_WRITE_TRACKING_FLAG_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the size of the core VFD backing store page size */
-    if(H5P_register_real(pclass, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_NAME, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_SIZE, &H5F_def_core_write_tracking_page_size_g, 
-            NULL, NULL, NULL, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_ENC, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_NAME, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_SIZE, &H5F_def_core_write_tracking_page_size_g,
+            NULL, NULL, NULL, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_ENC, H5F_ACS_CORE_WRITE_TRACKING_PAGE_SIZE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the # of read attempts */
-    if(H5P_register_real(pclass, H5F_ACS_METADATA_READ_ATTEMPTS_NAME, H5F_ACS_METADATA_READ_ATTEMPTS_SIZE, &H5F_def_metadata_read_attempts_g, 
-            NULL, NULL, NULL, H5F_ACS_METADATA_READ_ATTEMPTS_ENC, H5F_ACS_METADATA_READ_ATTEMPTS_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_METADATA_READ_ATTEMPTS_NAME, H5F_ACS_METADATA_READ_ATTEMPTS_SIZE, &H5F_def_metadata_read_attempts_g,
+            NULL, NULL, NULL, H5F_ACS_METADATA_READ_ATTEMPTS_ENC, H5F_ACS_METADATA_READ_ATTEMPTS_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register object flush callback */
     /* (Note: this property should not have an encode/decode callback -QAK) */
-    if(H5P_register_real(pclass, H5F_ACS_OBJECT_FLUSH_CB_NAME, H5F_ACS_OBJECT_FLUSH_CB_SIZE, &H5F_def_object_flush_cb_g, 
+    if(H5P_register_real(pclass, H5F_ACS_OBJECT_FLUSH_CB_NAME, H5F_ACS_OBJECT_FLUSH_CB_SIZE, &H5F_def_object_flush_cb_g,
             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
@@ -550,6 +576,16 @@ H5P__facc_reg_prop(H5P_genclass_t *pclass)
             NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
+    /* Register the private property of whether to skip EOF check. It's used by h5clear only. */
+    if(H5P_register_real(pclass, H5F_ACS_SKIP_EOF_CHECK_NAME, H5F_ACS_SKIP_EOF_CHECK_SIZE, &H5F_def_skip_eof_check_g,
+            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
+
+    /* Register the private property of whether to drop free-space to the floor. It's used by h5clear only. */
+    if(H5P_register_real(pclass, H5F_ACS_NULL_FSM_ADDR_NAME, H5F_ACS_NULL_FSM_ADDR_SIZE, &H5F_def_null_fsm_addr_g,
+            NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
+
     /* Register the metadata cache logging flag. */
     if(H5P_register_real(pclass, H5F_ACS_USE_MDC_LOGGING_NAME, H5F_ACS_USE_MDC_LOGGING_SIZE, &H5F_def_use_mdc_logging_g,
             NULL, NULL, NULL, H5F_ACS_USE_MDC_LOGGING_ENC, H5F_ACS_USE_MDC_LOGGING_DEC, NULL, NULL, NULL, NULL) < 0)
@@ -567,44 +603,44 @@ H5P__facc_reg_prop(H5P_genclass_t *pclass)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the evict on close flag */
-    if(H5P_register_real(pclass, H5F_ACS_EVICT_ON_CLOSE_FLAG_NAME, H5F_ACS_EVICT_ON_CLOSE_FLAG_SIZE, &H5F_def_evict_on_close_flag_g, 
-            NULL, NULL, NULL, H5F_ACS_EVICT_ON_CLOSE_FLAG_ENC, H5F_ACS_EVICT_ON_CLOSE_FLAG_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_EVICT_ON_CLOSE_FLAG_NAME, H5F_ACS_EVICT_ON_CLOSE_FLAG_SIZE, &H5F_def_evict_on_close_flag_g,
+            NULL, NULL, NULL, H5F_ACS_EVICT_ON_CLOSE_FLAG_ENC, H5F_ACS_EVICT_ON_CLOSE_FLAG_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
 #ifdef H5_HAVE_PARALLEL
     /* Register the metadata collective read flag */
-    if(H5P_register_real(pclass, H5_COLL_MD_READ_FLAG_NAME, H5F_ACS_COLL_MD_READ_FLAG_SIZE, &H5F_def_coll_md_read_flag_g, 
-            NULL, NULL, NULL, H5F_ACS_COLL_MD_READ_FLAG_ENC, H5F_ACS_COLL_MD_READ_FLAG_DEC, 
+    if(H5P_register_real(pclass, H5_COLL_MD_READ_FLAG_NAME, H5F_ACS_COLL_MD_READ_FLAG_SIZE, &H5F_def_coll_md_read_flag_g,
+            NULL, NULL, NULL, H5F_ACS_COLL_MD_READ_FLAG_ENC, H5F_ACS_COLL_MD_READ_FLAG_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the metadata collective write flag */
-    if(H5P_register_real(pclass, H5F_ACS_COLL_MD_WRITE_FLAG_NAME, H5F_ACS_COLL_MD_WRITE_FLAG_SIZE, &H5F_def_coll_md_write_flag_g, 
-            NULL, NULL, NULL, H5F_ACS_COLL_MD_WRITE_FLAG_ENC, H5F_ACS_COLL_MD_WRITE_FLAG_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_COLL_MD_WRITE_FLAG_NAME, H5F_ACS_COLL_MD_WRITE_FLAG_SIZE, &H5F_def_coll_md_write_flag_g,
+            NULL, NULL, NULL, H5F_ACS_COLL_MD_WRITE_FLAG_ENC, H5F_ACS_COLL_MD_WRITE_FLAG_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 #endif /* H5_HAVE_PARALLEL */
 
     /* Register the initial metadata cache image configuration */
-    if(H5P_register_real(pclass, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_NAME, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_SIZE, &H5F_def_mdc_initCacheImageCfg_g, 
-            NULL, NULL, NULL, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_ENC, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_NAME, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_SIZE, &H5F_def_mdc_initCacheImageCfg_g,
+            NULL, NULL, NULL, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_ENC, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_DEC,
             NULL, NULL, H5F_ACS_META_CACHE_INIT_IMAGE_CONFIG_CMP, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the size of the page buffer size */
-    if(H5P_register_real(pclass, H5F_ACS_PAGE_BUFFER_SIZE_NAME, H5F_ACS_PAGE_BUFFER_SIZE_SIZE, &H5F_def_page_buf_size_g, 
-            NULL, NULL, NULL, H5F_ACS_PAGE_BUFFER_SIZE_ENC, H5F_ACS_PAGE_BUFFER_SIZE_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_PAGE_BUFFER_SIZE_NAME, H5F_ACS_PAGE_BUFFER_SIZE_SIZE, &H5F_def_page_buf_size_g,
+            NULL, NULL, NULL, H5F_ACS_PAGE_BUFFER_SIZE_ENC, H5F_ACS_PAGE_BUFFER_SIZE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
     /* Register the size of the page buffer minimum metadata size */
-    if(H5P_register_real(pclass, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_NAME, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_SIZE, &H5F_def_page_buf_min_meta_perc_g, 
-            NULL, NULL, NULL, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_ENC, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_NAME, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_SIZE, &H5F_def_page_buf_min_meta_perc_g,
+            NULL, NULL, NULL, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_ENC, H5F_ACS_PAGE_BUFFER_MIN_META_PERC_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
     /* Register the size of the page buffer minimum raw data size */
-    if(H5P_register_real(pclass, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_NAME, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_SIZE, &H5F_def_page_buf_min_raw_perc_g, 
-            NULL, NULL, NULL, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_ENC, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_DEC, 
+    if(H5P_register_real(pclass, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_NAME, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_SIZE, &H5F_def_page_buf_min_raw_perc_g,
+            NULL, NULL, NULL, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_ENC, H5F_ACS_PAGE_BUFFER_MIN_RAW_PERC_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
@@ -612,35 +648,35 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_reg_prop() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_alignment
+ * Function:    H5Pset_alignment
  *
- * Purpose:	Sets the alignment properties of a file access property list
- *		so that any file object >= THRESHOLD bytes will be aligned on
- *		an address which is a multiple of ALIGNMENT.  The addresses
- *		are relative to the end of the user block; the alignment is
- *		calculated by subtracting the user block size from the
- *		absolute file address and then adjusting the address to be a
- *		multiple of ALIGNMENT.
+ * Purpose:    Sets the alignment properties of a file access property list
+ *        so that any file object >= THRESHOLD bytes will be aligned on
+ *        an address which is a multiple of ALIGNMENT.  The addresses
+ *        are relative to the end of the user block; the alignment is
+ *        calculated by subtracting the user block size from the
+ *        absolute file address and then adjusting the address to be a
+ *        multiple of ALIGNMENT.
  *
- *		Default values for THRESHOLD and ALIGNMENT are one, implying
- *		no alignment.  Generally the default values will result in
- *		the best performance for single-process access to the file.
- *		For MPI-IO and other parallel systems, choose an alignment
- *		which is a multiple of the disk block size.
+ *        Default values for THRESHOLD and ALIGNMENT are one, implying
+ *        no alignment.  Generally the default values will result in
+ *        the best performance for single-process access to the file.
+ *        For MPI-IO and other parallel systems, choose an alignment
+ *        which is a multiple of the disk block size.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, June  9, 1998
  *
  * Modifications:
  *
- *		Raymond Lu
- *		Tuesday, Oct 23, 2001
- *		Changed file access property list mechanism to the new
- *		generic property list.
+ *        Raymond Lu
+ *        Tuesday, Oct 23, 2001
+ *        Changed file access property list mechanism to the new
+ *        generic property list.
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -670,17 +706,17 @@ done:
     FUNC_LEAVE_API(ret_value)
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_alignment
+ * Function:    H5Pget_alignment
  *
- * Purpose:	Returns the current settings for alignment properties from a
- *		file access property list.  The THRESHOLD and/or ALIGNMENT
- *		pointers may be null pointers.
+ * Purpose:    Returns the current settings for alignment properties from a
+ *        file access property list.  The THRESHOLD and/or ALIGNMENT
+ *        pointers may be null pointers.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, June  9, 1998
  *
  *-------------------------------------------------------------------------
@@ -711,22 +747,22 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_alignment() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5P_set_driver
+ * Function:    H5P_set_driver
  *
- * Purpose:	Set the file driver (DRIVER_ID) for a file access 
- *		property list (PLIST_ID) and supply an optional
- *		struct containing the driver-specific properites
- *		(DRIVER_INFO).  The driver properties will be copied into the
- *		property list and the reference count on the driver will be
- *		incremented, allowing the caller to close the driver ID but
- *		still use the property list.
+ * Purpose:    Set the file driver (DRIVER_ID) for a file access
+ *        property list (PLIST_ID) and supply an optional
+ *        struct containing the driver-specific properites
+ *        (DRIVER_INFO).  The driver properties will be copied into the
+ *        property list and the reference count on the driver will be
+ *        incremented, allowing the caller to close the driver ID but
+ *        still use the property list.
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
+ * Return:    Success:    Non-negative
+ *        Failure:    Negative
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, August  3, 1999
  *
  *-------------------------------------------------------------------------
@@ -759,22 +795,22 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P_set_driver() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_driver
+ * Function:    H5Pset_driver
  *
- * Purpose:	Set the file driver (DRIVER_ID) for a file access 
- *		property list (PLIST_ID) and supply an optional
- *		struct containing the driver-specific properites
- *		(DRIVER_INFO).  The driver properties will be copied into the
- *		property list and the reference count on the driver will be
- *		incremented, allowing the caller to close the driver ID but
- *		still use the property list.
+ * Purpose:    Set the file driver (DRIVER_ID) for a file access
+ *        property list (PLIST_ID) and supply an optional
+ *        struct containing the driver-specific properites
+ *        (DRIVER_INFO).  The driver properties will be copied into the
+ *        property list and the reference count on the driver will be
+ *        incremented, allowing the caller to close the driver ID but
+ *        still use the property list.
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
+ * Return:    Success:    Non-negative
+ *        Failure:    Negative
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, August  3, 1999
  *
  *-------------------------------------------------------------------------
@@ -802,22 +838,22 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_driver() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5P_peek_driver
+ * Function:    H5P_peek_driver
  *
- * Purpose:	Return the ID of the low-level file driver.  PLIST_ID should
- *		be a file access property list.
+ * Purpose:    Return the ID of the low-level file driver.  PLIST_ID should
+ *        be a file access property list.
  *
- * Return:	Success:	A low-level driver ID which is the same ID
- *				used when the driver was set for the property
- *				list. The driver ID is only valid as long as
- *				the file driver remains registered.
+ * Return:    Success:    A low-level driver ID which is the same ID
+ *                used when the driver was set for the property
+ *                list. The driver ID is only valid as long as
+ *                the file driver remains registered.
  *
- *		Failure:	Negative
+ *        Failure:    Negative
  *
- * Programmer:	Robb Matzke
- *		Thursday, February 26, 1998
+ * Programmer:    Robb Matzke
+ *        Thursday, February 26, 1998
  *
  *-------------------------------------------------------------------------
  */
@@ -846,24 +882,24 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P_peek_driver() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_driver
+ * Function:    H5Pget_driver
  *
- * Purpose:	Return the ID of the low-level file driver.  PLIST_ID should
- *		be a file access property list.
+ * Purpose:    Return the ID of the low-level file driver.  PLIST_ID should
+ *        be a file access property list.
  *
- * Note:	The ID returned should not be closed.
+ * Note:    The ID returned should not be closed.
  *
- * Return:	Success:	A low-level driver ID which is the same ID
- *				used when the driver was set for the property
- *				list. The driver ID is only valid as long as
- *				the file driver remains registered.
+ * Return:    Success:    A low-level driver ID which is the same ID
+ *                used when the driver was set for the property
+ *                list. The driver ID is only valid as long as
+ *                the file driver remains registered.
  *
- *		Failure:	Negative
+ *        Failure:    Negative
  *
- * Programmer:	Robb Matzke
- *		Thursday, February 26, 1998
+ * Programmer:    Robb Matzke
+ *        Thursday, February 26, 1998
  *
  *-------------------------------------------------------------------------
  */
@@ -871,7 +907,7 @@ hid_t
 H5Pget_driver(hid_t plist_id)
 {
     H5P_genplist_t *plist;      /* Property list pointer */
-    hid_t	ret_value;      /* Return value */
+    hid_t    ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("i", "i", plist_id);
@@ -887,22 +923,22 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_driver() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5P_peek_driver_info
+ * Function:    H5P_peek_driver_info
  *
- * Purpose:	Returns a pointer directly to the file driver-specific
- *		information of a file access.
+ * Purpose:    Returns a pointer directly to the file driver-specific
+ *        information of a file access.
  *
- * Return:	Success:	Ptr to *uncopied* driver specific data
- *				structure if any.
+ * Return:    Success:    Ptr to *uncopied* driver specific data
+ *                structure if any.
  *
- *		Failure:	NULL. Null is also returned if the driver has
- *				not registered any driver-specific properties
- *				although no error is pushed on the stack in
- *				this case.
+ *        Failure:    NULL. Null is also returned if the driver has
+ *                not registered any driver-specific properties
+ *                although no error is pushed on the stack in
+ *                this case.
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, August  4, 1999
  *
  *-------------------------------------------------------------------------
@@ -929,22 +965,22 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P_peek_driver_info() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_driver_info
+ * Function:    H5Pget_driver_info
  *
- * Purpose:	Returns a pointer directly to the file driver-specific
- *		information of a file access.
+ * Purpose:    Returns a pointer directly to the file driver-specific
+ *        information of a file access.
  *
- * Return:	Success:	Ptr to *uncopied* driver specific data
- *				structure if any.
+ * Return:    Success:    Ptr to *uncopied* driver specific data
+ *                structure if any.
  *
- *		Failure:	NULL. Null is also returned if the driver has
- *				not registered any driver-specific properties
- *				although no error is pushed on the stack in
- *				this case.
+ *        Failure:    NULL. Null is also returned if the driver has
+ *                not registered any driver-specific properties
+ *                although no error is pushed on the stack in
+ *                this case.
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, August  4, 1999
  *
  *-------------------------------------------------------------------------
@@ -969,7 +1005,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_driver_info() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__file_driver_copy
  *
@@ -977,7 +1013,7 @@ done:
  *
  * Note:        This is an "in-place" copy, since this routine gets called
  *              after the top-level copy has been performed and this routine
- *		finishes the "deep" part of the copy.
+ *        finishes the "deep" part of the copy.
  *
  * Return:      Success:        Non-negative
  *              Failure:        Negative
@@ -1035,7 +1071,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__file_driver_copy() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__file_driver_free
  *
@@ -1087,7 +1123,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__file_driver_free() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_driver_create
  *
@@ -1116,7 +1152,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_driver_create() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_driver_set
  *
@@ -1149,7 +1185,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_driver_set() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_driver_get
  *
@@ -1182,7 +1218,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_driver_get() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_driver_del
  *
@@ -1211,7 +1247,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_driver_del() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_driver_copy
  *
@@ -1240,7 +1276,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_driver_copy() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_file_driver_cmp
  *
@@ -1299,7 +1335,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_driver_cmp() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_driver_close
  *
@@ -1328,7 +1364,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_driver_close() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pset_family_offset
  *
@@ -1367,7 +1403,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_family_offset() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pget_family_offset
  *
@@ -1408,7 +1444,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_family_offset() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pset_multi_type
  *
@@ -1447,7 +1483,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_multi_type() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pget_multi_type
  *
@@ -1488,32 +1524,32 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_multi_type() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_cache
+ * Function:    H5Pset_cache
  *
- * Purpose:	Set the number of objects in the meta data cache and the
- *		maximum number of chunks and bytes in the raw data chunk
- *		cache.
+ * Purpose:    Set the number of objects in the meta data cache and the
+ *        maximum number of chunks and bytes in the raw data chunk
+ *        cache.
  *
- * 		The RDCC_W0 value should be between 0 and 1 inclusive and
- *		indicates how much chunks that have been fully read or fully
- *		written are favored for preemption.  A value of zero means
- *		fully read or written chunks are treated no differently than
- *		other chunks (the preemption is strictly LRU) while a value
- *		of one means fully read chunks are always preempted before
- *		other chunks.
+ *         The RDCC_W0 value should be between 0 and 1 inclusive and
+ *        indicates how much chunks that have been fully read or fully
+ *        written are favored for preemption.  A value of zero means
+ *        fully read or written chunks are treated no differently than
+ *        other chunks (the preemption is strictly LRU) while a value
+ *        of one means fully read chunks are always preempted before
+ *        other chunks.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, May 19, 1998
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Pset_cache(hid_t plist_id, int H5_ATTR_UNUSED mdc_nelmts,
-	     size_t rdcc_nslots, size_t rdcc_nbytes, double rdcc_w0)
+        size_t rdcc_nslots, size_t rdcc_nbytes, double rdcc_w0)
 {
     H5P_genplist_t *plist;      /* Property list pointer */
     herr_t ret_value = SUCCEED;   /* return value */
@@ -1542,26 +1578,26 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_cache() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_cache
+ * Function:    H5Pget_cache
  *
- * Purpose:	Retrieves the maximum possible number of elements in the meta
- *		data cache and the maximum possible number of elements and
- *		bytes and the RDCC_W0 value in the raw data chunk cache.  Any
- *		(or all) arguments may be null pointers in which case the
- *		corresponding datum is not returned.
+ * Purpose:    Retrieves the maximum possible number of elements in the meta
+ *        data cache and the maximum possible number of elements and
+ *        bytes and the RDCC_W0 value in the raw data chunk cache.  Any
+ *        (or all) arguments may be null pointers in which case the
+ *        corresponding datum is not returned.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, May 19, 1998
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Pget_cache(hid_t plist_id, int *mdc_nelmts,
-	     size_t *rdcc_nslots, size_t *rdcc_nbytes, double *rdcc_w0)
+        size_t *rdcc_nslots, size_t *rdcc_nbytes, double *rdcc_w0)
 {
     H5P_genplist_t *plist;      /* Property list pointer */
     herr_t ret_value = SUCCEED;   /* return value */
@@ -1594,16 +1630,16 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_cache() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_mdc_image_config
+ * Function:    H5Pset_mdc_image_config
  *
- * Purpose:	Set the initial metadata cache image configuration in the
- *		target FAPL.
+ * Purpose:    Set the initial metadata cache image configuration in the
+ *        target FAPL.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	J. Mainzer
+ * Programmer:    J. Mainzer
  *              Thursday, June 25, 2015
  *
  *-------------------------------------------------------------------------
@@ -1638,20 +1674,20 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pset_mdc_image_config() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_mdc_image_config
+ * Function:    H5Pget_mdc_image_config
  *
- * Purpose:	Retrieve the metadata cache initial image configuration
- *		from the target FAPL.
+ * Purpose:    Retrieve the metadata cache initial image configuration
+ *        from the target FAPL.
  *
- *		Observe that the function will fail if config_ptr is
- *		NULL, or if config_ptr->version specifies an unknown
- *		version of H5AC_cache_image_config_t.
+ *        Observe that the function will fail if config_ptr is
+ *        NULL, or if config_ptr->version specifies an unknown
+ *        version of H5AC_cache_image_config_t.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	J. Mainzer
+ * Programmer:    J. Mainzer
  *              Friday, June 26, 2015
  *
  *-------------------------------------------------------------------------
@@ -1689,16 +1725,16 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pget_mdc_image_config() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_mdc_config
+ * Function:    H5Pset_mdc_config
  *
- * Purpose:	Set the initial metadata cache resize configuration in the
- *		target FAPL.
+ * Purpose:    Set the initial metadata cache resize configuration in the
+ *        target FAPL.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	J. Mainzer
+ * Programmer:    J. Mainzer
  *              Thursday, April 7, 2005
  *
  *-------------------------------------------------------------------------
@@ -1733,20 +1769,20 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pset_mdc_config() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_mdc_config
+ * Function:    H5Pget_mdc_config
  *
- * Purpose:	Retrieve the metadata cache initial resize configuration
- *		from the target FAPL.
+ * Purpose:    Retrieve the metadata cache initial resize configuration
+ *        from the target FAPL.
  *
- *		Observe that the function will fail if config_ptr is
- *		NULL, or if config_ptr->version specifies an unknown
- *		version of H5AC_cache_config_t.
+ *        Observe that the function will fail if config_ptr is
+ *        NULL, or if config_ptr->version specifies an unknown
+ *        version of H5AC_cache_config_t.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	J. Mainzer
+ * Programmer:    J. Mainzer
  *              Thursday, April 7, 2005
  *
  *-------------------------------------------------------------------------
@@ -1784,35 +1820,35 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pget_mdc_config() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_gc_references
+ * Function:    H5Pset_gc_references
  *
- * Purpose:	Sets the flag for garbage collecting references for the file.
- *		Dataset region references (and other reference types
- *		probably) use space in the file heap.  If garbage collection
- *		is on and the user passes in an uninitialized value in a
- *		reference structure, the heap might get corrupted.  When
- *		garbage collection is off however and the user re-uses a
- *		reference, the previous heap block will be orphaned and not
- *		returned to the free heap space.  When garbage collection is
- *		on, the user must initialize the reference structures to 0 or
- *		risk heap corruption.
+ * Purpose:    Sets the flag for garbage collecting references for the file.
+ *        Dataset region references (and other reference types
+ *        probably) use space in the file heap.  If garbage collection
+ *        is on and the user passes in an uninitialized value in a
+ *        reference structure, the heap might get corrupted.  When
+ *        garbage collection is off however and the user re-uses a
+ *        reference, the previous heap block will be orphaned and not
+ *        returned to the free heap space.  When garbage collection is
+ *        on, the user must initialize the reference structures to 0 or
+ *        risk heap corruption.
  *
- *		Default value for garbage collecting references is off, just
- *		to be on the safe side.
+ *        Default value for garbage collecting references is off, just
+ *        to be on the safe side.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		June, 1999
+ * Programmer:    Quincey Koziol
+ *        June, 1999
  *
  * Modifications:
  *
- *		Raymond Lu
- * 		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
+ *        Raymond Lu
+ *         Tuesday, Oct 23, 2001
+ *        Changed the file access list to the new generic property
+ *        list.
  *
  *-------------------------------------------------------------------------
  */
@@ -1837,24 +1873,24 @@ done:
     FUNC_LEAVE_API(ret_value)
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_gc_references
+ * Function:    H5Pget_gc_references
  *
- * Purpose:	Returns the current setting for the garbage collection
- *		references property from a file access property list.
+ * Purpose:    Returns the current setting for the garbage collection
+ *        references property from a file access property list.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              June, 1999
  *
  * Modifications:
  *
- *		Raymond Lu
- *		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
+ *        Raymond Lu
+ *        Tuesday, Oct 23, 2001
+ *        Changed the file access list to the new generic property
+ *        list.
  *
  *-------------------------------------------------------------------------
  */
@@ -1880,7 +1916,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 }
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pset_fclose_degree
  *
@@ -1916,7 +1952,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_fclose_degree() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pget_fclose_degree
  *
@@ -1951,33 +1987,33 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_fclose_degree() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_meta_block_size
+ * Function:    H5Pset_meta_block_size
  *
- * Purpose:	Sets the minimum size of metadata block allocations when
+ * Purpose:    Sets the minimum size of metadata block allocations when
  *      the H5FD_FEAT_AGGREGATE_METADATA is set by a VFL driver.
  *      Each "raw" metadata block is allocated to be this size and then
  *      specific pieces of metadata (object headers, local heaps, B-trees, etc)
  *      are sub-allocated from this block.
  *
- *		The default value is set to 2048 (bytes), indicating that metadata
+ *        The default value is set to 2048 (bytes), indicating that metadata
  *      will be attempted to be bunched together in (at least) 2K blocks in
  *      the file.  Setting the value to 0 with this API function will
  *      turn off the metadata aggregation, even if the VFL driver attempts to
  *      use that strategy.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Friday, August 25, 2000
  *
  * Modifications:
  *
- *		Raymond Lu
- *		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
+ *        Raymond Lu
+ *        Tuesday, Oct 23, 2001
+ *        Changed the file access list to the new generic property
+ *        list.
  *
  *-------------------------------------------------------------------------
  */
@@ -2002,24 +2038,24 @@ done:
     FUNC_LEAVE_API(ret_value)
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_meta_block_size
+ * Function:    H5Pget_meta_block_size
  *
- * Purpose:	Returns the current settings for the metadata block allocation
+ * Purpose:    Returns the current settings for the metadata block allocation
  *      property from a file access property list.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Friday, August 29, 2000
  *
  * Modifications:
  *
- *		Raymond Lu
- * 		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
+ *        Raymond Lu
+ *         Tuesday, Oct 23, 2001
+ *        Changed the file access list to the new generic property
+ *        list.
  *
  *-------------------------------------------------------------------------
  */
@@ -2046,33 +2082,33 @@ done:
     FUNC_LEAVE_API(ret_value)
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_sieve_buf_size
+ * Function:    H5Pset_sieve_buf_size
  *
- * Purpose:	Sets the maximum size of the data seive buffer used for file
+ * Purpose:    Sets the maximum size of the data seive buffer used for file
  *      drivers which are capable of using data sieving.  The data sieve
  *      buffer is used when performing I/O on datasets in the file.  Using a
  *      buffer which is large anough to hold several pieces of the dataset
  *      being read in for hyperslab selections boosts performance by quite a
  *      bit.
  *
- *		The default value is set to 64KB, indicating that file I/O for raw data
+ *        The default value is set to 64KB, indicating that file I/O for raw data
  *      reads and writes will occur in at least 64KB blocks.
  *      Setting the value to 0 with this API function will turn off the
  *      data sieving, even if the VFL driver attempts to use that strategy.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Thursday, September 21, 2000
  *
  * Modifications:
  *
- *		Raymond Lu
- * 		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
+ *        Raymond Lu
+ *         Tuesday, Oct 23, 2001
+ *        Changed the file access list to the new generic property
+ *        list.
  *
  *-------------------------------------------------------------------------
  */
@@ -2097,24 +2133,24 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_sieve_buf_size() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_sieve_buf_size
+ * Function:    H5Pget_sieve_buf_size
  *
- * Purpose:	Returns the current settings for the data sieve buffer size
+ * Purpose:    Returns the current settings for the data sieve buffer size
  *      property from a file access property list.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Thursday, September 21, 2000
  *
  * Modifications:
  *
- *		Raymond Lu
- * 		Tuesday, Oct 23, 2001
- *		Changed the file access list to the new generic property
- *		list.
+ *        Raymond Lu
+ *         Tuesday, Oct 23, 2001
+ *        Changed the file access list to the new generic property
+ *        list.
  *
  *-------------------------------------------------------------------------
  */
@@ -2140,25 +2176,25 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_sieve_buf_size() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_small_data_block_size
+ * Function:    H5Pset_small_data_block_size
  *
- * Purpose:	Sets the minimum size of "small" raw data block allocations
+ * Purpose:    Sets the minimum size of "small" raw data block allocations
  *      when the H5FD_FEAT_AGGREGATE_SMALLDATA is set by a VFL driver.
  *      Each "small" raw data block is allocated to be this size and then
  *      pieces of raw data which are small enough to fit are sub-allocated from
  *      this block.
  *
- *	The default value is set to 2048 (bytes), indicating that raw data
+ *    The default value is set to 2048 (bytes), indicating that raw data
  *      smaller than this value will be attempted to be bunched together in (at
  *      least) 2K blocks in the file.  Setting the value to 0 with this API
  *      function will turn off the "small" raw data aggregation, even if the
  *      VFL driver attempts to use that strategy.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Wednesday, June 5, 2002
  *
  * Modifications:
@@ -2186,16 +2222,16 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_small_data_block_size() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_small_data_block_size
+ * Function:    H5Pget_small_data_block_size
  *
- * Purpose:	Returns the current settings for the "small" raw data block
+ * Purpose:    Returns the current settings for the "small" raw data block
  *      allocation property from a file access property list.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Wednesday, June 5, 2002
  *
  * Modifications:
@@ -2225,11 +2261,11 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_small_data_block_size() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_libver_bounds
+ * Function:    H5Pset_libver_bounds
  *
- * Purpose:	Indicates which versions of the file format the library should
+ * Purpose:    Indicates which versions of the file format the library should
  *      use when creating objects.  LOW is the earliest version of the HDF5
  *      library that is guaranteed to be able to access the objects created
  *      (the format of some objects in an HDF5 file may not have changed between
@@ -2305,54 +2341,78 @@ done:
  *      releases and then map down to the previous actual library release which
  *      had a format change.
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
+ * Note #3: The enumerated define for H5F_libver_t in 1.10 is:
+ *      typedef enum H5F_libver_t {
+ *          H5F_LIBVER_ERROR = -1,
+ *          H5F_LIBVER_EARLIEST = 0,
+ *          H5F_LIBVER_V18 = 1,
+ *          H5F_LIBVER_V110 = 2,
+ *          H5F_LIBVER_NBOUNDS
+ *      } H5F_libver_t;
+ *      #define H5F_LIBVER_LATEST       H5F_LIBVER_V110
+ *
+ *      The library supports five pairs of (low, high) combinations via H5Pset_libver_bounds():
+ *      1) H5F_LIBVER_EARLIEST, H5F_LIBVER_V18
+ *      2) H5F_LIBVER_EARLIEST, H5F_LIBVER_LATEST
+ *      4) H5F_LIBVER_V18, H5F_LIBVER_V18
+ *      4) H5F_LIBVER_V18, H5F_LIBVER_LATEST
+ *      5) H5F_LIBVER_LATEST, H5F_LIBVER_LATEST
+ *      See detailed description in the RFC: Setting Bounds for Object Creation in HDF5 1.10.0.
+ *
+ * Return:    Non-negative on success/Negative on failure
+ *
+ * Programmer:    Quincey Koziol
  *              Sunday, December 30, 2007
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Pset_libver_bounds(hid_t plist_id, H5F_libver_t low,
-    H5F_libver_t high)
+H5Pset_libver_bounds(hid_t plist_id, H5F_libver_t low, H5F_libver_t high)
 {
     H5P_genplist_t *plist;      /* Property list pointer */
-    hbool_t latest;             /* Whether to use the latest version or not */
     herr_t ret_value = SUCCEED;   /* return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE3("e", "iFvFv", plist_id, low, high);
 
     /* Check args */
-    /* (Note that this is _really_ restricted right now, we'll want to loosen
-     *  this up more as we add features - QAK)
-     */
-    if(high != H5F_LIBVER_LATEST)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid high library version bound")
+    if(low < 0 || low > H5F_LIBVER_LATEST)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "low bound is not valid")
+
+    if(high < 0 || high > H5F_LIBVER_LATEST)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADRANGE, FAIL, "high bound is not valid")
+
+    /* (earliest, earliest), (latest, earliest), (v18, earliest) are not valid combinations */
+    if(high == H5F_LIBVER_EARLIEST)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid (low,high) combination of library version bound")
+
+    /* (latest, v18) is not valid combination */
+    if(high < low)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Invalid (low,high) combination of library version bound")
 
     /* Get the plist structure */
     if(NULL == (plist = H5P_object_verify(plist_id, H5P_FILE_ACCESS)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
     /* Set values */
-    latest = (hbool_t)((low == H5F_LIBVER_LATEST) ? TRUE : FALSE);
-    if(H5P_set(plist, H5F_ACS_LATEST_FORMAT_NAME, &latest) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set library version bounds")
-
+    if(H5P_set(plist, H5F_ACS_LIBVER_LOW_BOUND_NAME, &low) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set low bound for library format versions")
+    if(H5P_set(plist, H5F_ACS_LIBVER_HIGH_BOUND_NAME, &high) < 0)
+        HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set high bound for library format versions")
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_libver_bounds() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_libver_bounds
+ * Function:    H5Pget_libver_bounds
  *
- * Purpose:	Returns the current settings for the library version format bounds
- *      from a file access property list.
+ * Purpose:    Returns the current settings for the library version format bounds
+ *          from a file access property list.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Thursday, January 3, 2008
  *
  *-------------------------------------------------------------------------
@@ -2362,7 +2422,6 @@ H5Pget_libver_bounds(hid_t plist_id, H5F_libver_t *low/*out*/,
     H5F_libver_t *high/*out*/)
 {
     H5P_genplist_t *plist;      /* Property list pointer */
-    hbool_t latest;             /* Whether to use the latest version or not */
     herr_t ret_value = SUCCEED; /* return value */
 
     FUNC_ENTER_API(FAIL)
@@ -2372,22 +2431,22 @@ H5Pget_libver_bounds(hid_t plist_id, H5F_libver_t *low/*out*/,
     if(NULL == (plist = H5P_object_verify(plist_id, H5P_FILE_ACCESS)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
-    /* Get value */
-    if(H5P_get(plist, H5F_ACS_LATEST_FORMAT_NAME, &latest) < 0)
-        HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get library version bounds")
+     /* Get values */
+    if(low) {
+        if(H5P_get(plist, H5F_ACS_LIBVER_LOW_BOUND_NAME, low) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get low bound for library format versions")
+    }
 
-    /* Check for setting values to return */
-    /* (Again, this is restricted now, we'll need to open it up later -QAK) */
-    if(low)
-        *low = latest ? H5F_LIBVER_LATEST : H5F_LIBVER_EARLIEST;
-    if(high)
-        *high = H5F_LIBVER_LATEST;
+    if(high) {
+        if(H5P_get(plist, H5F_ACS_LIBVER_HIGH_BOUND_NAME, high) < 0)
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get high bound for library format versions")
+    }
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_libver_bounds() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pset_elink_file_cache_size
  *
@@ -2425,7 +2484,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_elink_file_cache_size() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pget_elink_file_cache_size
  *
@@ -2464,13 +2523,13 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_elink_file_cache_size() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5Pset_file_image
  *
- * Purpose:     Sets the initial file image. Some file drivers can initialize 
- *              the starting data in a file from a buffer. 
- *              
+ * Purpose:     Sets the initial file image. Some file drivers can initialize
+ *              the starting data in a file from a buffer.
+ *
  * Return:      Non-negative on success/Negative on failure
  *
  * Programmer:  Jacob Gruber
@@ -2484,22 +2543,22 @@ H5Pset_file_image(hid_t fapl_id, void *buf_ptr, size_t buf_len)
     H5P_genplist_t *fapl;               /* Property list pointer */
     H5FD_file_image_info_t image_info;  /* File image info */
     herr_t ret_value = SUCCEED;         /* Return value */
-    
+
     FUNC_ENTER_API(FAIL)
     H5TRACE3("e", "i*xz", fapl_id, buf_ptr, buf_len);
 
     /* validate parameters */
     if(!(((buf_ptr == NULL) && (buf_len == 0)) || ((buf_ptr != NULL) && (buf_len > 0))))
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "inconsistant buf_ptr and buf_len")
-   
+
     /* Get the plist structure */
     if(NULL == (fapl = H5P_object_verify(fapl_id, H5P_FILE_ACCESS)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
-        
+
     /* Get old image info */
     if(H5P_peek(fapl, H5F_ACS_FILE_IMAGE_INFO_NAME, &image_info) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get old file image pointer")
-        
+
     /* Release previous buffer, if it exists */
     if(image_info.buffer != NULL) {
         if(image_info.callbacks.image_free) {
@@ -2508,8 +2567,8 @@ H5Pset_file_image(hid_t fapl_id, void *buf_ptr, size_t buf_len)
         } /* end if */
         else
             H5MM_xfree(image_info.buffer);
-    } /* end if */  
-    
+    } /* end if */
+
     /* Update struct */
     if(buf_ptr) {
         /* Allocate memory */
@@ -2521,15 +2580,15 @@ H5Pset_file_image(hid_t fapl_id, void *buf_ptr, size_t buf_len)
          else
             if(NULL == (image_info.buffer = H5MM_malloc(buf_len)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate memory block")
-    
+
         /* Copy data */
         if(image_info.callbacks.image_memcpy) {
-            if(image_info.buffer != image_info.callbacks.image_memcpy(image_info.buffer, 
-                   buf_ptr, buf_len, H5FD_FILE_IMAGE_OP_PROPERTY_LIST_SET, 
+            if(image_info.buffer != image_info.callbacks.image_memcpy(image_info.buffer,
+                   buf_ptr, buf_len, H5FD_FILE_IMAGE_OP_PROPERTY_LIST_SET,
                    image_info.callbacks.udata))
-	        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
+            HGOTO_ERROR(H5E_RESOURCE, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
         } /* end if */
-	else
+    else
             HDmemcpy(image_info.buffer, buf_ptr, buf_len);
     } /* end if */
     else
@@ -2545,28 +2604,28 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_file_image() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5Pget_file_image
  *
- * Purpose:     If the file image exists and buf_ptr_ptr is not NULL, 
- *		allocate a buffer of the correct size, copy the image into 
- *		the new buffer, and return the buffer to the caller in 
- *		*buf_ptr_ptr.  Do this using the file image callbacks
- *		if defined.  
+ * Purpose:     If the file image exists and buf_ptr_ptr is not NULL,
+ *        allocate a buffer of the correct size, copy the image into
+ *        the new buffer, and return the buffer to the caller in
+ *        *buf_ptr_ptr.  Do this using the file image callbacks
+ *        if defined.
  *
- *		NB: It is the responsibility of the caller to free the 
- *		buffer whose address is returned in *buf_ptr_ptr.  Do
- *		this using free if the file image callbacks are not 
- *		defined, or with whatever method is appropriate if 
- *		the callbacks are defined.
+ *        NB: It is the responsibility of the caller to free the
+ *        buffer whose address is returned in *buf_ptr_ptr.  Do
+ *        this using free if the file image callbacks are not
+ *        defined, or with whatever method is appropriate if
+ *        the callbacks are defined.
  *
- *              If buf_ptr_ptr is not NULL, and no image exists, set 
- *		*buf_ptr_ptr to NULL.
+ *              If buf_ptr_ptr is not NULL, and no image exists, set
+ *        *buf_ptr_ptr to NULL.
  *
- *		If buf_len_ptr is not NULL, set *buf_len_ptr equal
- *		to the length of the file image if it exists, and 
- *		to 0 if it does not.
+ *        If buf_len_ptr is not NULL, set *buf_len_ptr equal
+ *        to the length of the file image if it exists, and
+ *        to 0 if it does not.
  *
  * Return:      Non-negative on success/Negative on failure
  *
@@ -2594,7 +2653,7 @@ H5Pget_file_image(hid_t fapl_id, void **buf_ptr_ptr, size_t *buf_len_ptr)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get file image info")
 
     /* verify file image field consistancy */
-    HDassert(((image_info.buffer != NULL) && (image_info.size > 0)) || 
+    HDassert(((image_info.buffer != NULL) && (image_info.size > 0)) ||
              ((image_info.buffer == NULL) && (image_info.size == 0)));
 
     /* Set output size */
@@ -2615,15 +2674,15 @@ H5Pget_file_image(hid_t fapl_id, void **buf_ptr_ptr, size_t *buf_len_ptr)
             else
                 if(NULL == (copy_ptr = H5MM_malloc(image_info.size)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate copy")
-    
+
             /* Copy data */
             if(image_info.callbacks.image_memcpy) {
                 if(copy_ptr != image_info.callbacks.image_memcpy(copy_ptr, image_info.buffer,
-                        image_info.size, H5FD_FILE_IMAGE_OP_PROPERTY_LIST_GET, 
+                        image_info.size, H5FD_FILE_IMAGE_OP_PROPERTY_LIST_GET,
                         image_info.callbacks.udata))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
             } /* end if */
-	    else
+        else
                 HDmemcpy(copy_ptr, image_info.buffer, image_info.size);
         } /* end if */
 
@@ -2634,13 +2693,13 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_file_image */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5Pset_file_image_callbacks
  *
  * Purpose:     Sets the callbacks for file images. Some file drivers allow
  *              the use of user-defined callbacks for allocating, freeing and
- *              copying the drivers internal buffer, potentially allowing a 
+ *              copying the drivers internal buffer, potentially allowing a
  *              clever user to do optimizations such as avoiding large mallocs
  *              and memcpys or to perform detailed logging.
  *
@@ -2670,7 +2729,7 @@ H5Pset_file_image_callbacks(hid_t fapl_id, H5FD_file_image_callbacks_t *callback
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get old file image info")
 
     /* verify file image field consistancy */
-    HDassert(((info.buffer != NULL) && (info.size > 0)) || 
+    HDassert(((info.buffer != NULL) && (info.size > 0)) ||
              ((info.buffer == NULL) && (info.size == 0)));
 
     /* Make sure a file image hasn't already been set */
@@ -2679,7 +2738,7 @@ H5Pset_file_image_callbacks(hid_t fapl_id, H5FD_file_image_callbacks_t *callback
 
     /* verify that callbacks_ptr is not NULL */
     if(NULL == callbacks_ptr)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL callbacks_ptr")
+    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL callbacks_ptr")
 
     /* Make sure udata callbacks are going to be set if udata is going to be set */
     if(callbacks_ptr->udata)
@@ -2690,7 +2749,7 @@ H5Pset_file_image_callbacks(hid_t fapl_id, H5FD_file_image_callbacks_t *callback
     if(info.callbacks.udata != NULL) {
         HDassert(info.callbacks.udata_free);
         if(info.callbacks.udata_free(info.callbacks.udata) < 0)
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "udata_free callback failed")
+        HGOTO_ERROR(H5E_RESOURCE, H5E_CANTFREE, FAIL, "udata_free callback failed")
     } /* end if */
 
     /* Update struct */
@@ -2711,13 +2770,13 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_file_image_callbacks() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5Pget_file_image_callbacks
  *
  * Purpose:     Sets the callbacks for file images. Some file drivers allow
  *              the use of user-defined callbacks for allocating, freeing and
- *              copying the drivers internal buffer, potentially allowing a 
+ *              copying the drivers internal buffer, potentially allowing a
  *              clever user to do optimizations such as avoiding large mallocs
  *
  * Return:      Non-negative on success/Negative on failure
@@ -2746,12 +2805,12 @@ H5Pget_file_image_callbacks(hid_t fapl_id, H5FD_file_image_callbacks_t *callback
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get file image info")
 
     /* verify file image field consistancy */
-    HDassert(((info.buffer != NULL) && (info.size > 0)) || 
+    HDassert(((info.buffer != NULL) && (info.size > 0)) ||
              ((info.buffer == NULL) && (info.size == 0)));
 
     /* verify that callbacks_ptr is not NULL */
     if(NULL == callbacks_ptr)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL callbacks_ptr")
+    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL callbacks_ptr")
 
     /* Transfer values to parameters */
     *callbacks_ptr = info.callbacks;
@@ -2767,17 +2826,17 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_file_image_callbacks() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__file_image_info_copy
  *
  * Purpose:     Copy file image info. The buffer
- *              and udata may need to be copied, possibly using their 
+ *              and udata may need to be copied, possibly using their
  *              respective callbacks so the default copy won't work.
  *
  * Note:        This is an "in-place" copy, since this routine gets called
  *              after the top-level copy has been performed and this routine
- *		finishes the "deep" part of the copy.
+ *        finishes the "deep" part of the copy.
  *
  * Return:      Success:        Non-negative
  *              Failure:        Negative
@@ -2800,7 +2859,7 @@ H5P__file_image_info_copy(void *value)
         info = (H5FD_file_image_info_t *)value;
 
         /* verify file image field consistancy */
-        HDassert(((info->buffer != NULL) && (info->size > 0)) || 
+        HDassert(((info->buffer != NULL) && (info->size > 0)) ||
                  ((info->buffer == NULL) && (info->size == 0)));
 
         if(info->buffer && info->size > 0) {
@@ -2819,14 +2878,14 @@ H5P__file_image_info_copy(void *value)
                 if(NULL == (info->buffer = H5MM_malloc(info->size)))
                     HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "unable to allocate memory block")
             } /* end else */
-            
+
             /* Copy data to new buffer */
             if(info->callbacks.image_memcpy) {
-                if(info->buffer != info->callbacks.image_memcpy(info->buffer, old_buffer, 
-			info->size, H5FD_FILE_IMAGE_OP_PROPERTY_LIST_COPY, info->callbacks.udata))
-		    HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
+                if(info->buffer != info->callbacks.image_memcpy(info->buffer, old_buffer,
+            info->size, H5FD_FILE_IMAGE_OP_PROPERTY_LIST_COPY, info->callbacks.udata))
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
             } /* end if */
-	    else
+        else
                 HDmemcpy(info->buffer, old_buffer, info->size);
         } /* end if */
 
@@ -2845,13 +2904,13 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__file_image_info_copy() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__file_image_info_free
  *
  * Purpose:     Free file image info.  The buffer and udata may need to be
- *		freed, possibly using their respective callbacks, so the
- *		default free won't work.
+ *        freed, possibly using their respective callbacks, so the
+ *        default free won't work.
  *
  * Return:      Success:        Non-negative
  *              Failure:        Negative
@@ -2872,16 +2931,16 @@ H5P__file_image_info_free(void *value)
         H5FD_file_image_info_t *info;        /* Image info struct */
 
         info = (H5FD_file_image_info_t *)value;
-             
+
         /* Verify file image field consistancy */
-        HDassert(((info->buffer != NULL) && (info->size > 0)) || 
+        HDassert(((info->buffer != NULL) && (info->size > 0)) ||
                  ((info->buffer == NULL) && (info->size == 0)));
 
         /* Free buffer */
-        if(info->buffer != NULL && info->size > 0) { 
+        if(info->buffer != NULL && info->size > 0) {
             if(info->callbacks.image_free) {
                 if((*info->callbacks.image_free)(info->buffer, H5FD_FILE_IMAGE_OP_PROPERTY_LIST_CLOSE, info->callbacks.udata) < 0)
-		    HGOTO_ERROR(H5E_PLIST, H5E_CANTFREE, FAIL, "image_free callback failed")
+            HGOTO_ERROR(H5E_PLIST, H5E_CANTFREE, FAIL, "image_free callback failed")
             } /* end if */
             else
                 H5MM_xfree(info->buffer);
@@ -2900,14 +2959,14 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__file_image_info_free() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5P__facc_cache_image_config_cmp
  *
  * Purpose: Compare two cache image configurations.
  *
  * Return: positive if VALUE1 is greater than VALUE2, negative if VALUE2 is
- *		greater than VALUE1 and zero if VALUE1 and VALUE2 are equal.
+ *        greater than VALUE1 and zero if VALUE1 and VALUE2 are equal.
  *
  * Programmer:     John Mainzer
  *                 June 26, 2015
@@ -2943,16 +3002,16 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_cache_image_config_cmp() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_cache_image_config_enc
  *
  * Purpose:        Callback routine which is called whenever the default
- *                 cache image config property in the file creation 
- *		   property list is encoded.
+ *                 cache image config property in the file creation
+ *           property list is encoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     John Mainzer
  *                 June 26, 2015
@@ -2989,16 +3048,16 @@ H5P__facc_cache_image_config_enc(const void *value, void **_pp, size_t *size)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__facc_cache_image_config_enc() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_cache_image_config_dec
  *
  * Purpose:        Callback routine which is called whenever the default
- *                 cache image config property in the file creation property 
- *		   list is  decoded.
+ *                 cache image config property in the file creation property
+ *           list is  decoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     John Mainzer
  *                 June 26, 2015
@@ -3041,7 +3100,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_cache_image_config_dec() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_image_info_set
  *
@@ -3074,7 +3133,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_image_info_set() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_image_info_get
  *
@@ -3107,13 +3166,13 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_image_info_get() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_image_info_del
  *
  * Purpose:     Delete callback for the file image info property, called
  *              when the property is deleted from the plist. The buffer
- *              and udata may need to be freed, possibly using their 
+ *              and udata may need to be freed, possibly using their
  *              respective callbacks so the default free won't work.
  *
  * Return:      Non-negative on success/Negative on failure
@@ -3138,12 +3197,12 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_image_info_del() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_image_info_copy
  *
  * Purpose:     Copy callback for the file image info property. The buffer
- *              and udata may need to be copied, possibly using their 
+ *              and udata may need to be copied, possibly using their
  *              respective callbacks so the default copy won't work.
  *
  * Return:      Non-negative on success/Negative on failure
@@ -3168,7 +3227,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_image_info_copy() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_file_image_info_cmp
  *
@@ -3227,12 +3286,12 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_image_info_cmp() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P__facc_file_image_info_close
  *
  * Purpose:     Close callback for the file image info property. The buffer
- *              and udata may need to be freed, possibly using their 
+ *              and udata may need to be freed, possibly using their
  *              respective callbacks so the standard free won't work.
  *
  * Return:      Non-negative on success/Negative on failure
@@ -3257,14 +3316,14 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_file_image_info_close() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function: H5P__facc_cache_config_cmp
  *
  * Purpose: Compare two cache configurations.
  *
  * Return: positive if VALUE1 is greater than VALUE2, negative if VALUE2 is
- *		greater than VALUE1 and zero if VALUE1 and VALUE2 are equal.
+ *        greater than VALUE1 and zero if VALUE1 and VALUE2 are equal.
  *
  * Programmer:     Mohamad Chaarawi
  *                 September 24, 2012
@@ -3369,7 +3428,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_cache_config_cmp() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_cache_config_enc
  *
@@ -3377,8 +3436,8 @@ done:
  *                 cache config property in the file creation property list is
  *                 encoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Mohamad Chaarawi
  *                 August 09, 2012
@@ -3514,7 +3573,7 @@ H5P__facc_cache_config_enc(const void *value, void **_pp, size_t *size)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__facc_cache_config_enc() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_cache_config_dec
  *
@@ -3522,8 +3581,8 @@ H5P__facc_cache_config_enc(const void *value, void **_pp, size_t *size)
  *                 cache config property in the file creation property list is
  *                 decoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Mohamad Chaarawi
  *                 August 09, 2012
@@ -3649,7 +3708,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P__facc_cache_config_dec() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_fclose_degree_enc
  *
@@ -3657,8 +3716,8 @@ done:
  *                 degree property in the file access property list
  *                 is encoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Quincey Koziol
  *                 Wednesday, August 15, 2012
@@ -3687,7 +3746,7 @@ H5P__facc_fclose_degree_enc(const void *value, void **_pp, size_t *size)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__facc_fclose_degree_enc() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_fclose_degree_dec
  *
@@ -3695,8 +3754,8 @@ H5P__facc_fclose_degree_enc(const void *value, void **_pp, size_t *size)
  *                 degree property in the file access property list
  *                 is decoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Quincey Koziol
  *                 Wednesday, August 15, 2012
@@ -3722,7 +3781,7 @@ H5P__facc_fclose_degree_dec(const void **_pp, void *_value)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__facc_fclose_degree_dec() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_multi_type_enc
  *
@@ -3730,8 +3789,8 @@ H5P__facc_fclose_degree_dec(const void **_pp, void *_value)
  *                 memory type property in the file access property list
  *                 is encoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Quincey Koziol
  *                 Wednesday, August 15, 2012
@@ -3760,7 +3819,7 @@ H5P__facc_multi_type_enc(const void *value, void **_pp, size_t *size)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__facc_multi_type_enc() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__facc_multi_type_dec
  *
@@ -3768,8 +3827,8 @@ H5P__facc_multi_type_enc(const void *value, void **_pp, size_t *size)
  *                 memory type property in the file access property list
  *                 is decoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Quincey Koziol
  *                 Wednesday, August 15, 2012
@@ -3795,14 +3854,85 @@ H5P__facc_multi_type_dec(const void **_pp, void *_value)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__facc_multi_type_dec() */
 
-
+
+/*-------------------------------------------------------------------------
+ * Function:       H5P__facc_libver_type_enc
+ *
+ * Purpose:        Callback routine which is called whenever the 'low' or
+ *                 'high' bound of library format versions property in the
+ *                 file access property list is encoded.
+ *
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
+ *
+ * Programmer
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__facc_libver_type_enc(const void *value, void **_pp, size_t *size)
+{
+    const H5F_libver_t *type = (const H5F_libver_t *)value; /* Create local alias for values */
+    uint8_t **pp = (uint8_t **)_pp;
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Sanity check */
+    HDassert(type);
+    HDassert(size);
+
+    /* Encode */
+    if(NULL != *pp)
+        *(*pp)++ = (uint8_t)*type;
+
+    /* Size */
+    (*size)++;
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__facc_libver_type_enc() */
+
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_core_write_tracking
+ * Function:       H5P__facc_libver_type_dec
+ *
+ * Purpose:        Callback routine which is called whenever the 'low' or
+ *                 'high' bound of library format versions property in the
+ *                 file access property list is decoded.
  *
- * Purpose:	Enables/disables core VFD write tracking and page
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
+ *
+ * Programmer:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5P__facc_libver_type_dec(const void **_pp, void *_value)
+{
+    H5F_libver_t *type = (H5F_libver_t *)_value;
+    const uint8_t **pp = (const uint8_t **)_pp;
+
+    FUNC_ENTER_STATIC_NOERR
+
+    /* Sanity checks */
+    HDassert(pp);
+    HDassert(*pp);
+    HDassert(type);
+
+    /* Decode */
+    *type = (H5F_libver_t)*(*pp)++;
+
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5P__facc_libver_type_dec() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Pset_core_write_tracking
+ *
+ * Purpose:    Enables/disables core VFD write tracking and page
  *              aggregation size.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
  * Programmer:  Dana Robinson
  *              Tuesday, April 8, 2014
@@ -3836,14 +3966,14 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_core_write_tracking() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_core_write_tracking
+ * Function:    H5Pget_core_write_tracking
  *
- * Purpose:	Gets information about core VFD write tracking and page
+ * Purpose:    Gets information about core VFD write tracking and page
  *              aggregation size.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
  * Programmer:  Dana Robinson
  *              Tuesday, April 8, 2014
@@ -3878,21 +4008,21 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_core_write_tracking() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_metadata_read_attempts
+ * Function:    H5Pset_metadata_read_attempts
  *
- * Purpose:	Sets the # of read attempts in the file access property list
- *		when reading metadata with checksum.
- *		The # of read attempts set via this routine will only apply
- *		when opening a file with SWMR access. 
- *		The # of read attempts set via this routine does not have 
- *		any effect when opening a file with non-SWMR access; for this
- *		case, the # of read attempts will be always be 1.
- *	
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:    Sets the # of read attempts in the file access property list
+ *        when reading metadata with checksum.
+ *        The # of read attempts set via this routine will only apply
+ *        when opening a file with SWMR access.
+ *        The # of read attempts set via this routine does not have
+ *        any effect when opening a file with non-SWMR access; for this
+ *        case, the # of read attempts will be always be 1.
  *
- * Programmer:	Vailin Choi; Sept 2013
+ * Return:    Non-negative on success/Negative on failure
+ *
+ * Programmer:    Vailin Choi; Sept 2013
  *
  *-------------------------------------------------------------------------
  */
@@ -3921,15 +4051,15 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pset_metadata_read_attempts() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_metadata_read_attempts
+ * Function:    H5Pget_metadata_read_attempts
  *
- * Purpose:	Returns the # of metadata read attempts set in the file access property list. 
+ * Purpose:    Returns the # of metadata read attempts set in the file access property list.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Vailin Choi; Sept 2013
+ * Programmer:    Vailin Choi; Sept 2013
  *
  *-------------------------------------------------------------------------
  */
@@ -3949,29 +4079,29 @@ H5Pget_metadata_read_attempts(hid_t plist_id, unsigned *attempts/*out*/)
         if(NULL == (plist = H5P_object_verify(plist_id, H5P_FILE_ACCESS)))
             HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
-	/* Get the # of read attempts set */
+    /* Get the # of read attempts set */
         if(H5P_get(plist, H5F_ACS_METADATA_READ_ATTEMPTS_NAME, attempts) < 0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get the number of metadata read attempts")
 
-	/* If not set, return the default value */
-	if(*attempts == H5F_ACS_METADATA_READ_ATTEMPTS_DEF)	/* 0 */
-	    *attempts = H5F_METADATA_READ_ATTEMPTS;
+    /* If not set, return the default value */
+    if(*attempts == H5F_ACS_METADATA_READ_ATTEMPTS_DEF)    /* 0 */
+        *attempts = H5F_METADATA_READ_ATTEMPTS;
     } /* end if */
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_metadata_read_attempts() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_obj_flush_cb
+ * Function:    H5Pset_obj_flush_cb
  *
- * Purpose:	Sets the callback function to invoke and the user data when an
- *		object flush occurs in the file.
- *	
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:    Sets the callback function to invoke and the user data when an
+ *        object flush occurs in the file.
  *
- * Programmer:	Vailin Choi; Dec 2013
+ * Return:    Non-negative on success/Negative on failure
+ *
+ * Programmer:    Vailin Choi; Dec 2013
  *
  *-------------------------------------------------------------------------
  */
@@ -4006,16 +4136,16 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pset_obj_flush_cb() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_obj_flush_cb
+ * Function:    H5Pget_obj_flush_cb
  *
- * Purpose:	Retrieves the callback function and user data set in the
- *		property list for an object flush.
- *	
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:    Retrieves the callback function and user data set in the
+ *        property list for an object flush.
  *
- * Programmer:	Vailin Choi; Dec 2013
+ * Return:    Non-negative on success/Negative on failure
+ *
+ * Programmer:    Vailin Choi; Dec 2013
  *
  *-------------------------------------------------------------------------
  */
@@ -4039,21 +4169,21 @@ H5Pget_object_flush_cb(hid_t plist_id, H5F_flush_cb_t *func, void **udata)
 
     /* Assign return value */
     if(func)
-	*func = flush_info.func;
+    *func = flush_info.func;
     if(udata)
-	*udata = flush_info.udata;
+    *udata = flush_info.udata;
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pget_obj_flush_cb() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_mdc_log_options
+ * Function:    H5Pset_mdc_log_options
  *
- * Purpose:	Set metadata cache log options.
+ * Purpose:    Set metadata cache log options.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
  *-------------------------------------------------------------------------
  */
@@ -4099,13 +4229,13 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_mdc_log_options() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_mdc_log_options
+ * Function:    H5Pget_mdc_log_options
  *
- * Purpose:	Get metadata cache log options. 
+ * Purpose:    Get metadata cache log options.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
  *-------------------------------------------------------------------------
  */
@@ -4154,7 +4284,7 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pget_mdc_log_options() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P_facc_mdc_log_location_enc
  *
@@ -4207,7 +4337,7 @@ H5P_facc_mdc_log_location_enc(const void *value, void **_pp, size_t *size)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P_facc_mdc_log_location_enc() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P_facc_mdc_log_location_dec
  *
@@ -4261,7 +4391,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P_facc_mdc_log_location_dec() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P_facc_mdc_log_location_del
  *
@@ -4284,7 +4414,7 @@ H5P_facc_mdc_log_location_del(hid_t H5_ATTR_UNUSED prop_id, const char H5_ATTR_U
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P_facc_mdc_log_location_del() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P_facc_mdc_log_location_copy
  *
@@ -4306,7 +4436,7 @@ H5P_facc_mdc_log_location_copy(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_U
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P_facc_mdc_log_location_copy() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P_facc_mdc_log_location_cmp
  *
@@ -4338,7 +4468,7 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5P_facc_mdc_log_location_cmp() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5P_facc_mdc_log_location_close
  *
@@ -4361,7 +4491,7 @@ H5P_facc_mdc_log_location_close(const char H5_ATTR_UNUSED *name, size_t H5_ATTR_
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P_facc_mdc_log_location_close() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pset_evict_on_close
  *
@@ -4397,15 +4527,19 @@ H5Pset_evict_on_close(hid_t fapl_id, hbool_t evict_on_close)
     if(NULL == (plist = (H5P_genplist_t *)H5I_object(fapl_id)))
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
-    /* Set values */
+#ifndef H5_HAVE_PARALLEL
+    /* Set value */
     if(H5P_set(plist, H5F_ACS_EVICT_ON_CLOSE_FLAG_NAME, &evict_on_close) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't set evict on close property")
+#else
+    HGOTO_ERROR(H5E_PLIST, H5E_UNSUPPORTED, FAIL, "evict on close is currently not supported in parallel HDF5")
+#endif /* H5_HAVE_PARALLEL */
 
 done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_evict_on_close() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:    H5Pget_evict_on_close
  *
@@ -4449,14 +4583,14 @@ done:
 } /* end H5Pget_evict_on_close() */
 
 #ifdef H5_HAVE_PARALLEL
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__encode_coll_md_read_flag_t
  *
  * Purpose:        Generic encoding callback routine for 'coll_md_read_flag' properties.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Mohamad Chaarawi
  *                 Sunday, June 21, 2015
@@ -4487,14 +4621,14 @@ H5P__encode_coll_md_read_flag_t(const void *value, void **_pp, size_t *size)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__encode_coll_md_read_flag_t() */
 
-
+
 /*-------------------------------------------------------------------------
  * Function:       H5P__decode_coll_md_read_flag_t
  *
  * Purpose:        Generic decoding callback routine for 'coll_md_read_flag' properties.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Mohamad Chaarawi
  *                 Sunday, June 21, 2015
@@ -4521,24 +4655,24 @@ H5P__decode_coll_md_read_flag_t(const void **_pp, void *_value)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5P__decode_coll_md_read_flag_t() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_all_coll_metadata_ops
+ * Function:    H5Pset_all_coll_metadata_ops
  *
- * Purpose:	Tell the library whether the metadata read operations will
- *		be done collectively (1) or not (0). Default is independent.
- *		With collective mode, the library will optimize access to
- *		metadata operations on the file.
+ * Purpose:    Tell the library whether the metadata read operations will
+ *        be done collectively (1) or not (0). Default is independent.
+ *        With collective mode, the library will optimize access to
+ *        metadata operations on the file.
  *
- * Note:	This routine accepts file access property lists, link
- *		access property lists, attribute access property lists,
- *		dataset access property lists, group access property lists,
- *		named datatype access property lists,
- *		and dataset transfer property lists.
+ * Note:    This routine accepts file access property lists, link
+ *        access property lists, attribute access property lists,
+ *        dataset access property lists, group access property lists,
+ *        named datatype access property lists,
+ *        and dataset transfer property lists.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Mohamad Chaarawi
+ * Programmer:    Mohamad Chaarawi
  *              Sunday, June 21, 2015
  *
  *-------------------------------------------------------------------------
@@ -4580,21 +4714,21 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_all_coll_metadata_ops() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_all_coll_metadata_ops
+ * Function:    H5Pget_all_coll_metadata_ops
  *
- * Purpose:	Gets information about collective metadata read mode.
+ * Purpose:    Gets information about collective metadata read mode.
  *
- * Note:	This routine accepts file access property lists, link
- *		access property lists, attribute access property lists,
- *		dataset access property lists, group access property lists,
- *		named datatype access property lists,
- *		and dataset transfer property lists.
+ * Note:    This routine accepts file access property lists, link
+ *        access property lists, attribute access property lists,
+ *        dataset access property lists, group access property lists,
+ *        named datatype access property lists,
+ *        and dataset transfer property lists.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Mohamad Chaarawi
+ * Programmer:    Mohamad Chaarawi
  *              Sunday, June 21, 2015
  *
  *-------------------------------------------------------------------------
@@ -4638,16 +4772,16 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* H5Pget_all_coll_metadata_ops */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_coll_metadata_write
+ * Function:    H5Pset_coll_metadata_write
  *
- * Purpose:	Tell the library whether the metadata write operations will
- *		be done collectively (1) or not (0). Default is collective.
+ * Purpose:    Tell the library whether the metadata write operations will
+ *        be done collectively (1) or not (0). Default is collective.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Mohamad Chaarawi
+ * Programmer:    Mohamad Chaarawi
  *              Sunday, June 21, 2015
  *
  *-------------------------------------------------------------------------
@@ -4677,15 +4811,15 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_coll_metadata_write() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_coll_metadata_write
+ * Function:    H5Pget_coll_metadata_write
  *
- * Purpose:	Gets information about collective metadata write mode.
+ * Purpose:    Gets information about collective metadata write mode.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Mohamad Chaarawi
+ * Programmer:    Mohamad Chaarawi
  *              Sunday, June 21, 2015
  *
  *-------------------------------------------------------------------------
@@ -4715,17 +4849,17 @@ done:
 } /* end H5Pget_coll_metadata_write() */
 #endif /* H5_HAVE_PARALLEL */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_page_buffer_size
+ * Function:    H5Pset_page_buffer_size
  *
  * Purpose:     Set the maximum page buffering size. This has to be a
  *              multiple of the page allocation size which must be enabled;
  *              otherwise file create/open will fail.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Mohamad Chaarawi
+ * Programmer:    Mohamad Chaarawi
  *              June 2015
  *
  *-------------------------------------------------------------------------
@@ -4763,15 +4897,15 @@ done:
     FUNC_LEAVE_API(ret_value)
 } /* end H5Pset_page_buffer_size() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_page_buffer_size
+ * Function:    H5Pget_page_buffer_size
  *
- * Purpose:	Retrieves the maximum page buffer size.
+ * Purpose:    Retrieves the maximum page buffer size.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Mohamad Chaarawi
+ * Programmer:    Mohamad Chaarawi
  *              June 2015
  *
  *-------------------------------------------------------------------------
diff --git a/src/H5Pfcpl.c b/src/H5Pfcpl.c
index c778801..6b0d2c0 100644
--- a/src/H5Pfcpl.c
+++ b/src/H5Pfcpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -1474,6 +1472,9 @@ H5Pset_file_space_page_size(hid_t plist_id, hsize_t fsp_size)
     if(fsp_size < H5F_FILE_SPACE_PAGE_SIZE_MIN)
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "cannot set file space page size to less than 512")
 
+    if(fsp_size > H5F_FILE_SPACE_PAGE_SIZE_MAX)
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "cannot set file space page size to more than 1GB")
+
     /* Set the value*/
     if(H5P_set(plist, H5F_CRT_FILE_SPACE_PAGE_SIZE_NAME, &fsp_size) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't set file space page size")
diff --git a/src/H5Pfmpl.c b/src/H5Pfmpl.c
index de9fa3b..e858a79 100644
--- a/src/H5Pfmpl.c
+++ b/src/H5Pfmpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Pgcpl.c b/src/H5Pgcpl.c
index f028f7a..6f1fab1 100644
--- a/src/H5Pgcpl.c
+++ b/src/H5Pgcpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Pint.c b/src/H5Pint.c
index 8e9a9bc..0e78463 100644
--- a/src/H5Pint.c
+++ b/src/H5Pint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
@@ -275,16 +273,15 @@ const H5P_libclass_t H5P_CLS_TACC[1] = {{
 
 
 /* Library property list classes defined in other code modules */
+/* (And not present in src/H5Pprivate.h) */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_OCRT[1];         /* Object creation */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_STRCRT[1];       /* String create */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_GCRT[1];         /* Group create */
-H5_DLLVAR const H5P_libclass_t H5P_CLS_OCPY[1];         /* Object copy */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_FCRT[1];         /* File creation */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_DCRT[1];         /* Dataset creation */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_DXFR[1];         /* Data transfer */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_FMNT[1];         /* File mount */
 H5_DLLVAR const H5P_libclass_t H5P_CLS_ACRT[1];         /* Attribute creation */
-H5_DLLVAR const H5P_libclass_t H5P_CLS_LCRT[1];         /* Link creation */
 
 
 /*****************************/
@@ -2860,6 +2857,7 @@ H5P__set_plist_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
 {
     H5P_prop_set_ud_t *udata = (H5P_prop_set_ud_t *)_udata;    /* User data for callback */
     void *tmp_value = NULL;     /* Temporary value for property */
+    const void *prp_value = NULL;	/* Property value */
     herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_STATIC
@@ -2883,10 +2881,13 @@ H5P__set_plist_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         /* Call user's callback */
         if((*(prop->set))(plist->plist_id, name, prop->size, tmp_value) < 0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "can't set property value")
+
+	/* Set the pointer for copying */
+	prp_value = tmp_value;
     } /* end if */
     /* No 'set' callback, just copy value */
     else
-        tmp_value = (void *)udata->value;       /* Casting away const OK -QAK */
+        prp_value = udata->value;
 
     /* Free any previous value for the property */
     if(NULL != prop->del) {
@@ -2896,11 +2897,11 @@ H5P__set_plist_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
     } /* end if */
 
     /* Copy new [possibly unchanged] value into property value */
-    HDmemcpy(prop->value, tmp_value, prop->size);
+    HDmemcpy(prop->value, prp_value, prop->size);
 
 done:
     /* Free the temporary value buffer */
-    if(tmp_value != NULL && tmp_value != udata->value)
+    if(tmp_value != NULL)
         H5MM_xfree(tmp_value);
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2935,6 +2936,7 @@ H5P__set_pclass_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
     H5P_prop_set_ud_t *udata = (H5P_prop_set_ud_t *)_udata;    /* User data for callback */
     H5P_genprop_t *pcopy = NULL;        /* Copy of property to insert into skip list */
     void *tmp_value = NULL;             /* Temporary value for property */
+    const void *prp_value = NULL;	/* Property value */
     herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_STATIC
@@ -2959,16 +2961,19 @@ H5P__set_pclass_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         /* Call user's callback */
         if((*(prop->set))(plist->plist_id, name, prop->size, tmp_value) < 0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "can't set property value")
+
+	/* Set the pointer for copying */
+	prp_value = tmp_value;
     } /* end if */
     /* No 'set' callback, just copy value */
     else
-        tmp_value = (void *)udata->value;       /* Casting away const OK -QAK */
+        prp_value = udata->value;
 
     /* Make a copy of the class's property */
     if(NULL == (pcopy = H5P_dup_prop(prop, H5P_PROP_WITHIN_LIST)))
         HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "Can't copy property")
 
-    HDmemcpy(pcopy->value, tmp_value, pcopy->size);
+    HDmemcpy(pcopy->value, prp_value, pcopy->size);
 
     /* Insert the changed property into the property list */
     if(H5P_add_prop(plist->props, pcopy) < 0)
@@ -2976,7 +2981,7 @@ H5P__set_pclass_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
 
 done:
     /* Free the temporary value buffer */
-    if(tmp_value != NULL && tmp_value != udata->value)
+    if(tmp_value != NULL)
         H5MM_xfree(tmp_value);
 
     /* Cleanup on failure */
@@ -5437,90 +5442,30 @@ H5P_get_class(const H5P_genplist_t *plist)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5P_verify_apl_and_dxpl
+ * Function:	H5P_get_default
  *
- * Purpose:	Validate access property list and/or switch from generic
- *		property list to default of correct type.
+ * Purpose:	Get the default property list ID, for a property class.
  *
- *		Also, if using internal DXPL and collective flag is set,
- *		switch to internal collective DXPL.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Success:        Non-negative ID of property list.
+ *              Failure:        negative.
  *
- * Programmer:	Mohamad Chaarawi
- *              Sunday, June 21, 2015
+ * Programmer:	Quincey Koziol <koziol@lbl.gov>
+ *		December 29, 2017
  *
  *-------------------------------------------------------------------------
  */
-herr_t 
-H5P_verify_apl_and_dxpl(hid_t *acspl_id, const H5P_libclass_t *libclass, hid_t *dxpl_id, 
-                        hid_t
-#ifndef H5_HAVE_PARALLEL
-                        H5_ATTR_UNUSED
-#endif /* H5_HAVE_PARALLEL */
-                        loc_id, hbool_t
-#ifndef H5_HAVE_PARALLEL
-                        H5_ATTR_UNUSED
-#endif /* H5_HAVE_PARALLEL */
-                        is_collective)
+hid_t
+H5P_get_default(const H5P_libclass_t *libclass)
 {
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    hid_t ret_value = H5I_INVALID_HID;  /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_NOAPI(H5I_INVALID_HID)
 
-    /* Sanity check */
-    HDassert(acspl_id);
     HDassert(libclass);
-    HDassert(dxpl_id);
 
-#ifdef H5_HAVE_PARALLEL
-    /* If parallel is enabled and the file driver used in the MPI-IO
-    VFD, issue an MPI barrier for easier debugging if the API function
-    calling this is supposed to be called collectively. Note that this
-    happens only when the environment variable H5_COLL_BARRIER is set
-    to non 0. */
-    if(is_collective && H5_coll_api_sanity_check_g) {
-        MPI_Comm mpi_comm; /* file communicator */
-
-        /* retrieve the MPI communicator from the loc_id or the fapl_id */
-        if(H5F_mpi_retrieve_comm(loc_id, *acspl_id, &mpi_comm) < 0)
-            HGOTO_ERROR(H5E_FILE, H5E_CANTGET, FAIL, "can't get MPI communicator")
-
-        /* issue the barrier */
-        if(mpi_comm != MPI_COMM_NULL)
-            MPI_Barrier(mpi_comm);
-    }
-#endif /* H5_HAVE_PARALLEL */
-
-    /* Set access plist to the default property list of the appropriate class if it's the generic default */
-    if(H5P_DEFAULT == *acspl_id)
-        *acspl_id = *libclass->def_plist_id;
-    else {
-#ifdef H5_HAVE_PARALLEL
-        H5P_coll_md_read_flag_t md_coll_read;      /* Collective metadata read flag */
-        H5P_genplist_t *plist;          /* Property list pointer */
-#endif /* H5_HAVE_PARALLEL */
-
-        /* Sanity check the access property list class */
-        if(TRUE != H5P_isa_class(*acspl_id, *libclass->class_id))
-            HGOTO_ERROR(H5E_PLIST, H5E_BADTYPE, FAIL, "not the required access property list")
-
-#ifdef H5_HAVE_PARALLEL
-        /* Get the plist structure for the access property list */
-        if(NULL == (plist = (H5P_genplist_t *)H5I_object(*acspl_id)))
-            HGOTO_ERROR(H5E_PLIST, H5E_BADATOM, FAIL, "can't find object for ID")
-
-        /* Get the collective metadata read flag */
-        if(H5P_peek(plist, H5_COLL_MD_READ_FLAG_NAME, &md_coll_read) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get core collective metadata read flag")
-
-        /* If collective metadata read requested and using internal DXPL, switch to internal collective DXPL */
-        if(H5P_USER_TRUE == md_coll_read)
-            *dxpl_id = H5AC_coll_read_dxpl_id;
-#endif /* H5_HAVE_PARALLEL */
-    } /* end else */
+    ret_value = *libclass->def_plist_id;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5P_verify_apl_and_dxpl() */
+} /* end H5P_get_default() */
 
diff --git a/src/H5Plapl.c b/src/H5Plapl.c
index a0ec7f1..18b81ac 100644
--- a/src/H5Plapl.c
+++ b/src/H5Plapl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Plcpl.c b/src/H5Plcpl.c
index f6e7793..6508a82 100644
--- a/src/H5Plcpl.c
+++ b/src/H5Plcpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Pmodule.h b/src/H5Pmodule.h
index ddf7c0f..d5c471a 100644
--- a/src/H5Pmodule.h
+++ b/src/H5Pmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Pocpl.c b/src/H5Pocpl.c
index 27044d5..be41e32 100644
--- a/src/H5Pocpl.c
+++ b/src/H5Pocpl.c
@@ -5,21 +5,19 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
  *
- * Created:		H5Pocpl.c
- *			Nov 28 2006
- *			Quincey Koziol <koziol@hdfgroup.org>
+ * Created:   H5Pocpl.c
+ *            Nov 28 2006
+ *            Quincey Koziol <koziol@hdfgroup.org>
  *
- * Purpose:		Object creation property list class routines
+ * Purpose:   Object creation property list class routines
  *
  *-------------------------------------------------------------------------
  */
@@ -28,21 +26,21 @@
 /* Module Setup */
 /****************/
 
-#define H5O_FRIEND		/*suppress error about including H5Opkg	  */
+#define H5O_FRIEND              /*suppress error about including H5Opkg      */
 #include "H5Pmodule.h"          /* This source code file is part of the H5P module */
 
 
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Opkg.h"             /* Object headers			*/
-#include "H5Ppkg.h"		/* Property lists		  	*/
-#include "H5PLprivate.h"	/* Dynamic plugin			*/
-#include "H5Zprivate.h"	        /* Filter pipeline			*/
+#include "H5private.h"         /* Generic Functions */
+#include "H5Eprivate.h"        /* Error handling    */
+#include "H5Iprivate.h"        /* IDs               */
+#include "H5MMprivate.h"       /* Memory management */
+#include "H5Opkg.h"            /* Object headers    */
+#include "H5Ppkg.h"            /* Property lists    */
+#include "H5PLprivate.h"       /* Dynamic plugin    */
+#include "H5Zprivate.h"        /* Filter pipeline   */
 
 
 /****************/
@@ -102,7 +100,7 @@ static int H5P__ocrt_pipeline_cmp(const void *value1, const void *value2, size_t
 static herr_t H5P__ocrt_pipeline_close(const char *name, size_t size, void *value);
 
 /* Local routines */
-static herr_t H5P__set_filter(H5P_genplist_t *plist, H5Z_filter_t filter, 
+static herr_t H5P__set_filter(H5P_genplist_t *plist, H5Z_filter_t filter,
     unsigned int flags, size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/]);
 
 /*********************/
@@ -111,21 +109,21 @@ static herr_t H5P__set_filter(H5P_genplist_t *plist, H5Z_filter_t filter,
 
 /* Object creation property list class library initialization object */
 const H5P_libclass_t H5P_CLS_OCRT[1] = {{
-    "object create",		/* Class name for debugging     */
-    H5P_TYPE_OBJECT_CREATE,     /* Class type                   */
-
-    &H5P_CLS_ROOT_g,		/* Parent class                 */
-    &H5P_CLS_OBJECT_CREATE_g,	/* Pointer to class             */
-    &H5P_CLS_OBJECT_CREATE_ID_g,	/* Pointer to class ID          */
-    NULL,			/* Pointer to default property list ID */
-    H5P__ocrt_reg_prop,		/* Default property registration routine */
-
-    NULL,		        /* Class creation callback      */
-    NULL,		        /* Class creation callback info */
-    NULL,			/* Class copy callback          */
-    NULL,		        /* Class copy callback info     */
-    NULL,			/* Class close callback         */
-    NULL 		        /* Class close callback info    */
+    "object create",                /* Class name for debugging     */
+    H5P_TYPE_OBJECT_CREATE,         /* Class type                   */
+
+    &H5P_CLS_ROOT_g,                /* Parent class                 */
+    &H5P_CLS_OBJECT_CREATE_g,       /* Pointer to class             */
+    &H5P_CLS_OBJECT_CREATE_ID_g,    /* Pointer to class ID          */
+    NULL,                           /* Pointer to default property list ID   */
+    H5P__ocrt_reg_prop,             /* Default property registration routine */
+
+    NULL,                           /* Class creation callback      */
+    NULL,                           /* Class creation callback info */
+    NULL,                           /* Class copy callback          */
+    NULL,                           /* Class copy callback info     */
+    NULL,                           /* Class close callback         */
+    NULL                            /* Class close callback info    */
 }};
 
 
@@ -167,25 +165,25 @@ H5P__ocrt_reg_prop(H5P_genclass_t *pclass)
     FUNC_ENTER_STATIC
 
     /* Register max. compact attribute storage property */
-    if(H5P_register_real(pclass, H5O_CRT_ATTR_MAX_COMPACT_NAME, H5O_CRT_ATTR_MAX_COMPACT_SIZE, &H5O_def_attr_max_compact_g, 
+    if(H5P_register_real(pclass, H5O_CRT_ATTR_MAX_COMPACT_NAME, H5O_CRT_ATTR_MAX_COMPACT_SIZE, &H5O_def_attr_max_compact_g,
             NULL, NULL, NULL, H5O_CRT_ATTR_MAX_COMPACT_ENC, H5O_CRT_ATTR_MAX_COMPACT_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register min. dense attribute storage property */
-    if(H5P_register_real(pclass, H5O_CRT_ATTR_MIN_DENSE_NAME, H5O_CRT_ATTR_MIN_DENSE_SIZE, &H5O_def_attr_min_dense_g, 
+    if(H5P_register_real(pclass, H5O_CRT_ATTR_MIN_DENSE_NAME, H5O_CRT_ATTR_MIN_DENSE_SIZE, &H5O_def_attr_min_dense_g,
             NULL, NULL, NULL, H5O_CRT_ATTR_MIN_DENSE_ENC, H5O_CRT_ATTR_MIN_DENSE_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register object header flags property */
-    if(H5P_register_real(pclass, H5O_CRT_OHDR_FLAGS_NAME, H5O_CRT_OHDR_FLAGS_SIZE, &H5O_def_ohdr_flags_g, 
+    if(H5P_register_real(pclass, H5O_CRT_OHDR_FLAGS_NAME, H5O_CRT_OHDR_FLAGS_SIZE, &H5O_def_ohdr_flags_g,
             NULL, NULL, NULL, H5O_CRT_OHDR_FLAGS_ENC, H5O_CRT_OHDR_FLAGS_DEC,
             NULL, NULL, NULL, NULL) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
 
     /* Register the pipeline property */
-    if(H5P_register_real(pclass, H5O_CRT_PIPELINE_NAME, H5O_CRT_PIPELINE_SIZE, &H5O_def_pline_g, 
+    if(H5P_register_real(pclass, H5O_CRT_PIPELINE_NAME, H5O_CRT_PIPELINE_SIZE, &H5O_def_pline_g,
             NULL, H5O_CRT_PIPELINE_SET, H5O_CRT_PIPELINE_GET, H5O_CRT_PIPELINE_ENC, H5O_CRT_PIPELINE_DEC,
             H5O_CRT_PIPELINE_DEL, H5O_CRT_PIPELINE_COPY, H5O_CRT_PIPELINE_CMP, H5O_CRT_PIPELINE_CLOSE) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINSERT, FAIL, "can't insert property into class")
@@ -196,9 +194,9 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_attr_phase_change
+ * Function:    H5Pset_attr_phase_change
  *
- * Purpose:	Sets the cutoff values for indexes storing attributes
+ * Purpose:    Sets the cutoff values for indexes storing attributes
  *              in object headers for this file.  If more than max_compact
  *              attributes are in an object header, the attributes will be
  *              moved to a heap and indexed with a B-tree.
@@ -210,10 +208,10 @@ done:
  *              never be stored in the object header but will be always be
  *              stored in a heap.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		Tuesday, November 28, 2006
+ * Programmer:    Quincey Koziol
+ *        Tuesday, November 28, 2006
  *
  *-------------------------------------------------------------------------
  */
@@ -250,14 +248,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_attr_phase_change
+ * Function:    H5Pget_attr_phase_change
  *
- * Purpose:	Gets the phase change values for attribute storage
+ * Purpose:    Gets the phase change values for attribute storage
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		Tuesday, November 28, 2006
+ * Programmer:    Quincey Koziol
+ *        Tuesday, November 28, 2006
  *
  *-------------------------------------------------------------------------
  */
@@ -488,37 +486,37 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5P_modify_filter
- *
- * Purpose:	Modifies the specified FILTER in the
- *		transient or permanent output filter pipeline
- *		depending on whether PLIST is a dataset creation or dataset
- *		transfer property list.  The FLAGS argument specifies certain
- *		general properties of the filter and is documented below.
- *		The CD_VALUES is an array of CD_NELMTS integers which are
- *		auxiliary data for the filter.  The integer vlues will be
- *		stored in the dataset object header as part of the filter
- *		information.
- *
- * 		The FLAGS argument is a bit vector of the following fields:
- *
- * 		H5Z_FLAG_OPTIONAL(0x0001)
- *		If this bit is set then the filter is optional.  If the
- *		filter fails during an H5Dwrite() operation then the filter
- *		is just excluded from the pipeline for the chunk for which it
- *		failed; the filter will not participate in the pipeline
- *		during an H5Dread() of the chunk.  If this bit is clear and
- *		the filter fails then the entire I/O operation fails.
+ * Function:    H5P_modify_filter
+ *
+ * Purpose:    Modifies the specified FILTER in the
+ *        transient or permanent output filter pipeline
+ *        depending on whether PLIST is a dataset creation or dataset
+ *        transfer property list.  The FLAGS argument specifies certain
+ *        general properties of the filter and is documented below.
+ *        The CD_VALUES is an array of CD_NELMTS integers which are
+ *        auxiliary data for the filter.  The integer vlues will be
+ *        stored in the dataset object header as part of the filter
+ *        information.
+ *
+ *         The FLAGS argument is a bit vector of the following fields:
+ *
+ *         H5Z_FLAG_OPTIONAL(0x0001)
+ *        If this bit is set then the filter is optional.  If the
+ *        filter fails during an H5Dwrite() operation then the filter
+ *        is just excluded from the pipeline for the chunk for which it
+ *        failed; the filter will not participate in the pipeline
+ *        during an H5Dread() of the chunk.  If this bit is clear and
+ *        the filter fails then the entire I/O operation fails.
  *      If this bit is set but encoding is disabled for a filter,
  *      attempting to write will generate an error.
  *
- * Note:	This function currently supports only the permanent filter
- *		pipeline.  That is, PLIST_ID must be a dataset creation
- *		property list.
+ * Note:    This function currently supports only the permanent filter
+ *        pipeline.  That is, PLIST_ID must be a dataset creation
+ *        property list.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Wednesday, October 17, 2007
  *
  *-------------------------------------------------------------------------
@@ -625,33 +623,33 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pset_filter
- *
- * Purpose:	Adds the specified FILTER and corresponding properties to the
- *		end of the data or link output filter pipeline
- *		depending on whether PLIST is a dataset creation or group
- *		creation property list.  The FLAGS argument specifies certain
- *		general properties of the filter and is documented below.
- *		The CD_VALUES is an array of CD_NELMTS integers which are
- *		auxiliary data for the filter.  The integer vlues will be
- *		stored in the dataset object header as part of the filter
- *		information.
- *
- * 		The FLAGS argument is a bit vector of the following fields:
- *
- * 		H5Z_FLAG_OPTIONAL(0x0001)
- *		If this bit is set then the filter is optional.  If the
- *		filter fails during an H5Dwrite() operation then the filter
- *		is just excluded from the pipeline for the chunk for which it
- *		failed; the filter will not participate in the pipeline
- *		during an H5Dread() of the chunk.  If this bit is clear and
- *		the filter fails then the entire I/O operation fails.
+ * Function:    H5Pset_filter
+ *
+ * Purpose:    Adds the specified FILTER and corresponding properties to the
+ *        end of the data or link output filter pipeline
+ *        depending on whether PLIST is a dataset creation or group
+ *        creation property list.  The FLAGS argument specifies certain
+ *        general properties of the filter and is documented below.
+ *        The CD_VALUES is an array of CD_NELMTS integers which are
+ *        auxiliary data for the filter.  The integer vlues will be
+ *        stored in the dataset object header as part of the filter
+ *        information.
+ *
+ *         The FLAGS argument is a bit vector of the following fields:
+ *
+ *         H5Z_FLAG_OPTIONAL(0x0001)
+ *        If this bit is set then the filter is optional.  If the
+ *        filter fails during an H5Dwrite() operation then the filter
+ *        is just excluded from the pipeline for the chunk for which it
+ *        failed; the filter will not participate in the pipeline
+ *        during an H5Dread() of the chunk.  If this bit is clear and
+ *        the filter fails then the entire I/O operation fails.
  *      If this bit is set but encoding is disabled for a filter,
  *      attempting to write will generate an error.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, April 15, 1998
  *
  * Modifications:
@@ -670,7 +668,7 @@ done:
  */
 herr_t
 H5Pset_filter(hid_t plist_id, H5Z_filter_t filter, unsigned int flags,
-	       size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
+        size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
 {
     H5P_genplist_t  *plist;             /* Property list */
     herr_t          ret_value=SUCCEED;  /* return value */
@@ -700,43 +698,43 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5P__set_filter
- *
- * Purpose:	Adds the specified FILTER and corresponding properties to the
- *		end of the data or link output filter pipeline
- *		depending on whether PLIST is a dataset creation or group
- *		creation property list.  The FLAGS argument specifies certain
- *		general properties of the filter and is documented below.
- *		The CD_VALUES is an array of CD_NELMTS integers which are
- *		auxiliary data for the filter.  The integer vlues will be
- *		stored in the dataset object header as part of the filter
- *		information.
- *
- * 		The FLAGS argument is a bit vector of the following fields:
- *
- * 		H5Z_FLAG_OPTIONAL(0x0001)
- *		If this bit is set then the filter is optional.  If the
- *		filter fails during an H5Dwrite() operation then the filter
- *		is just excluded from the pipeline for the chunk for which it
- *		failed; the filter will not participate in the pipeline
- *		during an H5Dread() of the chunk.  If this bit is clear and
- *		the filter fails then the entire I/O operation fails.
- *		If this bit is set but encoding is disabled for a filter,
- *		attempting to write will generate an error.
- *
- *              If the filter is not registered, this function tries to load 
+ * Function:    H5P__set_filter
+ *
+ * Purpose:    Adds the specified FILTER and corresponding properties to the
+ *        end of the data or link output filter pipeline
+ *        depending on whether PLIST is a dataset creation or group
+ *        creation property list.  The FLAGS argument specifies certain
+ *        general properties of the filter and is documented below.
+ *        The CD_VALUES is an array of CD_NELMTS integers which are
+ *        auxiliary data for the filter.  The integer vlues will be
+ *        stored in the dataset object header as part of the filter
+ *        information.
+ *
+ *         The FLAGS argument is a bit vector of the following fields:
+ *
+ *         H5Z_FLAG_OPTIONAL(0x0001)
+ *        If this bit is set then the filter is optional.  If the
+ *        filter fails during an H5Dwrite() operation then the filter
+ *        is just excluded from the pipeline for the chunk for which it
+ *        failed; the filter will not participate in the pipeline
+ *        during an H5Dread() of the chunk.  If this bit is clear and
+ *        the filter fails then the entire I/O operation fails.
+ *        If this bit is set but encoding is disabled for a filter,
+ *        attempting to write will generate an error.
+ *
+ *              If the filter is not registered, this function tries to load
  *              it dynamically during run time.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, April 15, 1998
  *
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5P__set_filter(H5P_genplist_t *plist, H5Z_filter_t filter, unsigned int flags,
-	       size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
+        size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
 {
     H5O_pline_t     pline;                  /* Filter pipeline */
     htri_t          filter_avail;           /* Filter availability */
@@ -748,16 +746,6 @@ H5P__set_filter(H5P_genplist_t *plist, H5Z_filter_t filter, unsigned int flags,
     if((filter_avail = H5Z_filter_avail(filter)) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTSET, FAIL, "can't check filter availability")
 
-    /* If filter is not available, try to dynamically load it */
-    if(!filter_avail) {
-        const H5Z_class2_t *filter_info;
-
-        if(NULL == (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, (int)filter)))
-            HGOTO_ERROR(H5E_PLINE, H5E_CANTLOAD, FAIL, "failed to load dynamically loaded plugin")
-        if(H5Z_register(filter_info) < 0)
-	    HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
-    } /* end if */
-
     /* Get the pipeline property to append to */
     if(H5P_peek(plist, H5O_CRT_PIPELINE_NAME, &pline) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't get pipeline")
@@ -776,21 +764,21 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_nfilters
+ * Function:    H5Pget_nfilters
  *
- * Purpose:	Returns the number of filters in the data or link
- *		pipeline depending on whether PLIST_ID is a dataset creation
- *		or group creation property list.  In each pipeline the
- *		filters are numbered from zero through N-1 where N is the
- *		value returned by this function.  During output to the file
- *		the filters of a pipeline are applied in increasing order
- *		(the inverse is true for input).
+ * Purpose:    Returns the number of filters in the data or link
+ *        pipeline depending on whether PLIST_ID is a dataset creation
+ *        or group creation property list.  In each pipeline the
+ *        filters are numbered from zero through N-1 where N is the
+ *        value returned by this function.  During output to the file
+ *        the filters of a pipeline are applied in increasing order
+ *        (the inverse is true for input).
  *
- * Return:	Success:	Number of filters or zero if there are none.
+ * Return:    Success:    Number of filters or zero if there are none.
  *
- *		Failure:	Negative
+ *        Failure:    Negative
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, August  4, 1998
  *
  * Modifications:
@@ -829,25 +817,25 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_filter2
- *
- * Purpose:	This is the query counterpart of H5Pset_filter() and returns
- *		information about a particular filter number in a permanent
- *		or transient pipeline depending on whether PLIST_ID is a
- *		dataset creation or transfer property list.  On input,
- *		CD_NELMTS indicates the number of entries in the CD_VALUES
- *		array allocated by the caller while on exit it contains the
- *		number of values defined by the filter.  FILTER_CONFIG is a bit
+ * Function:    H5Pget_filter2
+ *
+ * Purpose:    This is the query counterpart of H5Pset_filter() and returns
+ *        information about a particular filter number in a permanent
+ *        or transient pipeline depending on whether PLIST_ID is a
+ *        dataset creation or transfer property list.  On input,
+ *        CD_NELMTS indicates the number of entries in the CD_VALUES
+ *        array allocated by the caller while on exit it contains the
+ *        number of values defined by the filter.  FILTER_CONFIG is a bit
  *      field contaning encode/decode flags from H5Zpublic.h.  The IDX
  *      should be a value between zero and N-1 as described for
  *      H5Pget_nfilters() and the function will return failure if the
  *      filter number is out of range.
  *
- * Return:	Success:	Filter identification number.
+ * Return:    Success:    Filter identification number.
  *
- *		Failure:	H5Z_FILTER_ERROR (Negative)
+ *        Failure:    H5Z_FILTER_ERROR (Negative)
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, April 15, 1998
  *
  * Modifications:
@@ -861,8 +849,8 @@ done:
  */
 H5Z_filter_t
 H5Pget_filter2(hid_t plist_id, unsigned idx, unsigned int *flags/*out*/,
-	       size_t *cd_nelmts/*in_out*/, unsigned cd_values[]/*out*/,
-	       size_t namelen, char name[]/*out*/,
+        size_t *cd_nelmts/*in_out*/, unsigned cd_values[]/*out*/,
+        size_t namelen, char name[]/*out*/,
                unsigned *filter_config /*out*/)
 {
     H5P_genplist_t  *plist;             /* Property list */
@@ -923,23 +911,23 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5P_get_filter_by_id
+ * Function:    H5P_get_filter_by_id
  *
- * Purpose:	This is an additional query counterpart of H5Pset_filter() and
+ * Purpose:    This is an additional query counterpart of H5Pset_filter() and
  *              returns information about a particular filter in a permanent
- *		or transient pipeline depending on whether PLIST_ID is a
- *		dataset creation or transfer property list.  On input,
- *		CD_NELMTS indicates the number of entries in the CD_VALUES
- *		array allocated by the caller while on exit it contains the
- *		number of values defined by the filter.  FILTER_CONFIG is a bit
+ *        or transient pipeline depending on whether PLIST_ID is a
+ *        dataset creation or transfer property list.  On input,
+ *        CD_NELMTS indicates the number of entries in the CD_VALUES
+ *        array allocated by the caller while on exit it contains the
+ *        number of values defined by the filter.  FILTER_CONFIG is a bit
  *      field contaning encode/decode flags from H5Zpublic.h.  The ID
  *      should be the filter ID to retrieve the parameters for.  If the
  *      filter is not set for the property list, an error will be returned.
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
+ * Return:    Success:    Non-negative
+ *        Failure:    Negative
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Wednesday, October 17, 2007
  *
  *-------------------------------------------------------------------------
@@ -973,23 +961,23 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_filter_by_id2
+ * Function:    H5Pget_filter_by_id2
  *
- * Purpose:	This is an additional query counterpart of H5Pset_filter() and
+ * Purpose:    This is an additional query counterpart of H5Pset_filter() and
  *              returns information about a particular filter in a permanent
- *		or transient pipeline depending on whether PLIST_ID is a
- *		dataset creation or transfer property list.  On input,
- *		CD_NELMTS indicates the number of entries in the CD_VALUES
- *		array allocated by the caller while on exit it contains the
- *		number of values defined by the filter.  FILTER_CONFIG is a bit
+ *        or transient pipeline depending on whether PLIST_ID is a
+ *        dataset creation or transfer property list.  On input,
+ *        CD_NELMTS indicates the number of entries in the CD_VALUES
+ *        array allocated by the caller while on exit it contains the
+ *        number of values defined by the filter.  FILTER_CONFIG is a bit
  *      field contaning encode/decode flags from H5Zpublic.h.  The ID
  *      should be the filter ID to retrieve the parameters for.  If the
  *      filter is not set for the property list, an error will be returned.
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
+ * Return:    Success:    Non-negative
+ *        Failure:    Negative
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Friday, April  5, 2003
  *
  * Modifications:
@@ -1049,16 +1037,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pall_filters_avail
+ * Function:    H5Pall_filters_avail
  *
- * Purpose:	This is a query routine to verify that all the filters set
+ * Purpose:    This is a query routine to verify that all the filters set
  *              in the dataset creation property list are available currently.
  *
- * Return:	Success:	TRUE if all filters available, FALSE if one or
+ * Return:    Success:    TRUE if all filters available, FALSE if one or
  *                              more filters not currently available.
- *		Failure:	FAIL on error
+ *        Failure:    FAIL on error
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Tuesday, April  8, 2003
  *
  * Modifications:
@@ -1098,16 +1086,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5P_filter_in_pline
+ * Function:    H5P_filter_in_pline
  *
- * Purpose:	Check whether the filter is in the pipeline of the object
- *              creation property list.  
+ * Purpose:    Check whether the filter is in the pipeline of the object
+ *              creation property list.
  *
- * Return:	TRUE:		found
- *		FALSE:		not found
- *              FAIL: 		error
+ * Return:    TRUE:        found
+ *        FALSE:        not found
+ *              FAIL:         error
  *
- * Programmer:	Raymond Lu
+ * Programmer:    Raymond Lu
  *              26 April 2013
  *
  *-------------------------------------------------------------------------
@@ -1200,7 +1188,7 @@ done:
  *
  * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, April 15, 1998
  *
  * Modifications:
@@ -1260,7 +1248,7 @@ done:
  *
  * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:	Raymond Lu
+ * Programmer:    Raymond Lu
  *              Dec 19, 2002
  *
  * Modifications:
@@ -1304,13 +1292,13 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5P_get_filter
+ * Function:    H5P_get_filter
  *
- * Purpose:	Internal component of H5Pget_filter & H5Pget_filter_id
+ * Purpose:    Internal component of H5Pget_filter & H5Pget_filter_id
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Monday, October 23, 2006
  *
  *-------------------------------------------------------------------------
@@ -1332,7 +1320,7 @@ H5P_get_filter(const H5Z_filter_info_t *filter, unsigned int *flags/*out*/,
 
     /* Filter parameters */
     if(cd_values) {
-        size_t	i;                      /* Local index variable */
+        size_t    i;                      /* Local index variable */
 
         for(i = 0; i < filter->cd_nelmts && i < *cd_nelmts; i++)
             cd_values[i] = filter->cd_values[i];
@@ -1462,8 +1450,8 @@ done:
  *                 property in the dataset access property list is
  *                 decoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Mohamad Chaarawi
  *                 Monday, October 10, 2011
@@ -1555,15 +1543,15 @@ H5P__ocrt_pipeline_enc(const void *value, void **_pp, size_t *size)
  *                 property in the dataset access property list is
  *                 decoded.
  *
- * Return:	   Success:	Non-negative
- *		   Failure:	Negative
+ * Return:       Success:    Non-negative
+ *           Failure:    Negative
  *
  * Programmer:     Mohamad Chaarawi
  *                 Monday, October 10, 2011
  *
  *-------------------------------------------------------------------------
  */
-static herr_t 
+static herr_t
 H5P__ocrt_pipeline_dec(const void **_pp, void *_value)
 {
     H5O_pline_t *pline = (H5O_pline_t *)_value;   /* Property to set */
@@ -1639,7 +1627,7 @@ H5P__ocrt_pipeline_dec(const void **_pp, void *_value)
         filter.cd_values = (unsigned *)H5MM_xfree(filter.cd_values);
     } /* end for */
 
-done: 
+done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* H5P__ocrt_pipeline_dec() */
 
@@ -1832,32 +1820,32 @@ done:
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_filter1
- *
- * Purpose:	This is the query counterpart of H5Pset_filter() and returns
- *		information about a particular filter number in a permanent
- *		or transient pipeline depending on whether PLIST_ID is a
- *		dataset creation or transfer property list.  On input,
- *		CD_NELMTS indicates the number of entries in the CD_VALUES
- *		array allocated by the caller while on exit it contains the
- *		number of values defined by the filter.  The IDX
+ * Function:    H5Pget_filter1
+ *
+ * Purpose:    This is the query counterpart of H5Pset_filter() and returns
+ *        information about a particular filter number in a permanent
+ *        or transient pipeline depending on whether PLIST_ID is a
+ *        dataset creation or transfer property list.  On input,
+ *        CD_NELMTS indicates the number of entries in the CD_VALUES
+ *        array allocated by the caller while on exit it contains the
+ *        number of values defined by the filter.  The IDX
  *      should be a value between zero and N-1 as described for
  *      H5Pget_nfilters() and the function will return failure if the
  *      filter number is out of range.
  *
- * Return:	Success:	Filter identification number.
+ * Return:    Success:    Filter identification number.
  *
- *		Failure:	H5Z_FILTER_ERROR (Negative)
+ *        Failure:    H5Z_FILTER_ERROR (Negative)
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, April 15, 1998
  *
  *-------------------------------------------------------------------------
  */
 H5Z_filter_t
 H5Pget_filter1(hid_t plist_id, unsigned idx, unsigned int *flags/*out*/,
-	       size_t *cd_nelmts/*in_out*/, unsigned cd_values[]/*out*/,
-	       size_t namelen, char name[]/*out*/)
+        size_t *cd_nelmts/*in_out*/, unsigned cd_values[]/*out*/,
+        size_t namelen, char name[]/*out*/)
 {
     H5O_pline_t         pline;  /* Filter pipeline */
     const H5Z_filter_info_t *filter;  /* Pointer to filter information */
@@ -1917,22 +1905,22 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Pget_filter_by_id1
+ * Function:    H5Pget_filter_by_id1
  *
- * Purpose:	This is an additional query counterpart of H5Pset_filter() and
+ * Purpose:    This is an additional query counterpart of H5Pset_filter() and
  *              returns information about a particular filter in a permanent
- *		or transient pipeline depending on whether PLIST_ID is a
- *		dataset creation or transfer property list.  On input,
- *		CD_NELMTS indicates the number of entries in the CD_VALUES
- *		array allocated by the caller while on exit it contains the
- *		number of values defined by the filter.  The ID
+ *        or transient pipeline depending on whether PLIST_ID is a
+ *        dataset creation or transfer property list.  On input,
+ *        CD_NELMTS indicates the number of entries in the CD_VALUES
+ *        array allocated by the caller while on exit it contains the
+ *        number of values defined by the filter.  The ID
  *      should be the filter ID to retrieve the parameters for.  If the
  *      filter is not set for the property list, an error will be returned.
  *
- * Return:	Success:	Non-negative
- *		Failure:	Negative
+ * Return:    Success:    Non-negative
+ *        Failure:    Negative
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Friday, April  5, 2003
  *
  *-------------------------------------------------------------------------
diff --git a/src/H5Pocpypl.c b/src/H5Pocpypl.c
index faa2a04..47bba05 100644
--- a/src/H5Pocpypl.c
+++ b/src/H5Pocpypl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Ppkg.h b/src/H5Ppkg.h
index 7d29f3d..13463ae 100644
--- a/src/H5Ppkg.h
+++ b/src/H5Ppkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Pprivate.h b/src/H5Pprivate.h
index 29fb919..1a2bb95 100644
--- a/src/H5Pprivate.h
+++ b/src/H5Pprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -19,6 +17,9 @@
 #ifndef _H5Pprivate_H
 #define _H5Pprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5P_genplist_t H5P_genplist_t;
+
 /* Include package's public header */
 #include "H5Ppublic.h"
 
@@ -54,12 +55,7 @@ typedef enum H5P_coll_md_read_flag_t {
     H5P_USER_TRUE               = 1
 } H5P_coll_md_read_flag_t;
 
-/* Forward declarations (for prototypes & type definitions) */
-struct H5O_fill_t;
-struct H5T_t;
-
 /* Forward declarations for anonymous H5P objects */
-typedef struct H5P_genplist_t H5P_genplist_t;
 typedef struct H5P_genclass_t H5P_genclass_t;
 
 typedef enum H5P_plist_type_t {
@@ -136,17 +132,23 @@ H5_DLLVAR H5P_genclass_t *H5P_CLS_LINK_ACCESS_g;
 H5_DLLVAR H5P_genclass_t *H5P_CLS_STRING_CREATE_g;
 
 /* Internal property list classes */
+H5_DLLVAR const struct H5P_libclass_t H5P_CLS_LCRT[1];  /* Link creation */
 H5_DLLVAR const struct H5P_libclass_t H5P_CLS_LACC[1];  /* Link access */
 H5_DLLVAR const struct H5P_libclass_t H5P_CLS_AACC[1];  /* Attribute access */
 H5_DLLVAR const struct H5P_libclass_t H5P_CLS_DACC[1];  /* Dataset access */
 H5_DLLVAR const struct H5P_libclass_t H5P_CLS_GACC[1];  /* Group access */
 H5_DLLVAR const struct H5P_libclass_t H5P_CLS_TACC[1];  /* Named datatype access */
 H5_DLLVAR const struct H5P_libclass_t H5P_CLS_FACC[1];  /* File access */
+H5_DLLVAR const struct H5P_libclass_t H5P_CLS_OCPY[1];  /* Object copy */
 
 /******************************/
 /* Library Private Prototypes */
 /******************************/
 
+/* Forward declaration of structs used below */
+struct H5O_fill_t;
+struct H5T_t;
+
 /* Package initialization routine */
 H5_DLL herr_t H5P_init(void);
 
@@ -188,8 +190,7 @@ H5_DLL herr_t H5P_get_filter_by_id(H5P_genplist_t *plist, H5Z_filter_t id,
     unsigned int *flags, size_t *cd_nelmts, unsigned cd_values[],
     size_t namelen, char name[], unsigned *filter_config);
 H5_DLL htri_t H5P_filter_in_pline(H5P_genplist_t *plist, H5Z_filter_t id);
-H5_DLL herr_t H5P_verify_apl_and_dxpl(hid_t *acspl_id, const H5P_libclass_t *libclass, 
-    hid_t *dxpl_id, hid_t loc_id, hbool_t is_collective);
+H5_DLL hid_t H5P_get_default(const H5P_libclass_t *pclass);
 
 /* Query internal fields of the property list struct */
 H5_DLL hid_t H5P_get_plist_id(const H5P_genplist_t *plist);
@@ -203,7 +204,7 @@ H5_DLL H5P_genplist_t *H5P_object_verify(hid_t plist_id, hid_t pclass_id);
 H5_DLL herr_t H5P_fill_value_defined(H5P_genplist_t *plist,
     H5D_fill_value_t *status);
 H5_DLL herr_t H5P_get_fill_value(H5P_genplist_t *plist, const struct H5T_t *type,
-    void *value, hid_t dxpl_id);
+    void *value);
 
 #endif /* _H5Pprivate_H */
 
diff --git a/src/H5Ppublic.h b/src/H5Ppublic.h
index 50b9eb0..a2c0418 100644
--- a/src/H5Ppublic.h
+++ b/src/H5Ppublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -52,43 +50,43 @@
  * The library's property list classes
  */
 
-#define H5P_ROOT		   	(H5OPEN H5P_CLS_ROOT_ID_g)
-#define H5P_OBJECT_CREATE 		(H5OPEN H5P_CLS_OBJECT_CREATE_ID_g)
-#define H5P_FILE_CREATE 		(H5OPEN H5P_CLS_FILE_CREATE_ID_g)
-#define H5P_FILE_ACCESS 		(H5OPEN H5P_CLS_FILE_ACCESS_ID_g)
-#define H5P_DATASET_CREATE     		(H5OPEN H5P_CLS_DATASET_CREATE_ID_g)
-#define H5P_DATASET_ACCESS     		(H5OPEN H5P_CLS_DATASET_ACCESS_ID_g)
-#define H5P_DATASET_XFER       		(H5OPEN H5P_CLS_DATASET_XFER_ID_g)
-#define H5P_FILE_MOUNT       		(H5OPEN H5P_CLS_FILE_MOUNT_ID_g)
-#define H5P_GROUP_CREATE 		(H5OPEN H5P_CLS_GROUP_CREATE_ID_g)
-#define H5P_GROUP_ACCESS 		(H5OPEN H5P_CLS_GROUP_ACCESS_ID_g)
-#define H5P_DATATYPE_CREATE 		(H5OPEN H5P_CLS_DATATYPE_CREATE_ID_g)
-#define H5P_DATATYPE_ACCESS 		(H5OPEN H5P_CLS_DATATYPE_ACCESS_ID_g)
-#define H5P_STRING_CREATE 		(H5OPEN H5P_CLS_STRING_CREATE_ID_g)
-#define H5P_ATTRIBUTE_CREATE 		(H5OPEN H5P_CLS_ATTRIBUTE_CREATE_ID_g)
-#define H5P_ATTRIBUTE_ACCESS 		(H5OPEN H5P_CLS_ATTRIBUTE_ACCESS_ID_g)
-#define H5P_OBJECT_COPY	 		(H5OPEN H5P_CLS_OBJECT_COPY_ID_g)
-#define H5P_LINK_CREATE 		(H5OPEN H5P_CLS_LINK_CREATE_ID_g)
-#define H5P_LINK_ACCESS 		(H5OPEN H5P_CLS_LINK_ACCESS_ID_g)
+#define H5P_ROOT                (H5OPEN H5P_CLS_ROOT_ID_g)
+#define H5P_OBJECT_CREATE       (H5OPEN H5P_CLS_OBJECT_CREATE_ID_g)
+#define H5P_FILE_CREATE         (H5OPEN H5P_CLS_FILE_CREATE_ID_g)
+#define H5P_FILE_ACCESS         (H5OPEN H5P_CLS_FILE_ACCESS_ID_g)
+#define H5P_DATASET_CREATE      (H5OPEN H5P_CLS_DATASET_CREATE_ID_g)
+#define H5P_DATASET_ACCESS      (H5OPEN H5P_CLS_DATASET_ACCESS_ID_g)
+#define H5P_DATASET_XFER        (H5OPEN H5P_CLS_DATASET_XFER_ID_g)
+#define H5P_FILE_MOUNT          (H5OPEN H5P_CLS_FILE_MOUNT_ID_g)
+#define H5P_GROUP_CREATE        (H5OPEN H5P_CLS_GROUP_CREATE_ID_g)
+#define H5P_GROUP_ACCESS        (H5OPEN H5P_CLS_GROUP_ACCESS_ID_g)
+#define H5P_DATATYPE_CREATE     (H5OPEN H5P_CLS_DATATYPE_CREATE_ID_g)
+#define H5P_DATATYPE_ACCESS     (H5OPEN H5P_CLS_DATATYPE_ACCESS_ID_g)
+#define H5P_STRING_CREATE       (H5OPEN H5P_CLS_STRING_CREATE_ID_g)
+#define H5P_ATTRIBUTE_CREATE    (H5OPEN H5P_CLS_ATTRIBUTE_CREATE_ID_g)
+#define H5P_ATTRIBUTE_ACCESS    (H5OPEN H5P_CLS_ATTRIBUTE_ACCESS_ID_g)
+#define H5P_OBJECT_COPY         (H5OPEN H5P_CLS_OBJECT_COPY_ID_g)
+#define H5P_LINK_CREATE         (H5OPEN H5P_CLS_LINK_CREATE_ID_g)
+#define H5P_LINK_ACCESS         (H5OPEN H5P_CLS_LINK_ACCESS_ID_g)
 
 /*
  * The library's default property lists
  */
-#define H5P_FILE_CREATE_DEFAULT		(H5OPEN H5P_LST_FILE_CREATE_ID_g)
-#define H5P_FILE_ACCESS_DEFAULT 	(H5OPEN H5P_LST_FILE_ACCESS_ID_g)
-#define H5P_DATASET_CREATE_DEFAULT  	(H5OPEN H5P_LST_DATASET_CREATE_ID_g)
-#define H5P_DATASET_ACCESS_DEFAULT  	(H5OPEN H5P_LST_DATASET_ACCESS_ID_g)
-#define H5P_DATASET_XFER_DEFAULT   	(H5OPEN H5P_LST_DATASET_XFER_ID_g)
-#define H5P_FILE_MOUNT_DEFAULT       	(H5OPEN H5P_LST_FILE_MOUNT_ID_g)
-#define H5P_GROUP_CREATE_DEFAULT	(H5OPEN H5P_LST_GROUP_CREATE_ID_g)
-#define H5P_GROUP_ACCESS_DEFAULT 	(H5OPEN H5P_LST_GROUP_ACCESS_ID_g)
-#define H5P_DATATYPE_CREATE_DEFAULT	(H5OPEN H5P_LST_DATATYPE_CREATE_ID_g)
-#define H5P_DATATYPE_ACCESS_DEFAULT 	(H5OPEN H5P_LST_DATATYPE_ACCESS_ID_g)
-#define H5P_ATTRIBUTE_CREATE_DEFAULT	(H5OPEN H5P_LST_ATTRIBUTE_CREATE_ID_g)
-#define H5P_ATTRIBUTE_ACCESS_DEFAULT	(H5OPEN H5P_LST_ATTRIBUTE_ACCESS_ID_g)
-#define H5P_OBJECT_COPY_DEFAULT		(H5OPEN H5P_LST_OBJECT_COPY_ID_g)
-#define H5P_LINK_CREATE_DEFAULT		(H5OPEN H5P_LST_LINK_CREATE_ID_g)
-#define H5P_LINK_ACCESS_DEFAULT		(H5OPEN H5P_LST_LINK_ACCESS_ID_g)
+#define H5P_FILE_CREATE_DEFAULT        (H5OPEN H5P_LST_FILE_CREATE_ID_g)
+#define H5P_FILE_ACCESS_DEFAULT        (H5OPEN H5P_LST_FILE_ACCESS_ID_g)
+#define H5P_DATASET_CREATE_DEFAULT     (H5OPEN H5P_LST_DATASET_CREATE_ID_g)
+#define H5P_DATASET_ACCESS_DEFAULT     (H5OPEN H5P_LST_DATASET_ACCESS_ID_g)
+#define H5P_DATASET_XFER_DEFAULT       (H5OPEN H5P_LST_DATASET_XFER_ID_g)
+#define H5P_FILE_MOUNT_DEFAULT         (H5OPEN H5P_LST_FILE_MOUNT_ID_g)
+#define H5P_GROUP_CREATE_DEFAULT       (H5OPEN H5P_LST_GROUP_CREATE_ID_g)
+#define H5P_GROUP_ACCESS_DEFAULT       (H5OPEN H5P_LST_GROUP_ACCESS_ID_g)
+#define H5P_DATATYPE_CREATE_DEFAULT    (H5OPEN H5P_LST_DATATYPE_CREATE_ID_g)
+#define H5P_DATATYPE_ACCESS_DEFAULT    (H5OPEN H5P_LST_DATATYPE_ACCESS_ID_g)
+#define H5P_ATTRIBUTE_CREATE_DEFAULT   (H5OPEN H5P_LST_ATTRIBUTE_CREATE_ID_g)
+#define H5P_ATTRIBUTE_ACCESS_DEFAULT   (H5OPEN H5P_LST_ATTRIBUTE_ACCESS_ID_g)
+#define H5P_OBJECT_COPY_DEFAULT        (H5OPEN H5P_LST_OBJECT_COPY_ID_g)
+#define H5P_LINK_CREATE_DEFAULT        (H5OPEN H5P_LST_LINK_CREATE_ID_g)
+#define H5P_LINK_ACCESS_DEFAULT        (H5OPEN H5P_LST_LINK_ACCESS_ID_g)
 
 /* Common creation order flags (for links in groups and attributes on objects) */
 #define H5P_CRT_ORDER_TRACKED           0x0001
@@ -142,9 +140,9 @@ typedef enum H5D_mpio_actual_chunk_opt_mode_t {
 typedef enum H5D_mpio_actual_io_mode_t {
     /* The following four values are conveniently defined as a bit field so that
      * we can switch from the default to indpendent or collective and then to
-     * mixed without having to check the original value. 
-     * 
-     * NO_COLLECTIVE means that either collective I/O wasn't requested or that 
+     * mixed without having to check the original value.
+     *
+     * NO_COLLECTIVE means that either collective I/O wasn't requested or that
      * no I/O took place.
      *
      * CHUNK_INDEPENDENT means that collective I/O was requested, but the
@@ -157,7 +155,7 @@ typedef enum H5D_mpio_actual_io_mode_t {
 
     /* The contiguous case is separate from the bit field. */
     H5D_MPIO_CONTIGUOUS_COLLECTIVE = 0x4
-} H5D_mpio_actual_io_mode_t; 
+} H5D_mpio_actual_io_mode_t;
 
 /* Broken collective IO property */
 typedef enum H5D_mpio_no_collective_cause_t {
@@ -168,7 +166,7 @@ typedef enum H5D_mpio_no_collective_cause_t {
     H5D_MPIO_MPI_OPT_TYPES_ENV_VAR_DISABLED = 0x08,
     H5D_MPIO_NOT_SIMPLE_OR_SCALAR_DATASPACES = 0x10,
     H5D_MPIO_NOT_CONTIGUOUS_OR_CHUNKED_DATASET = 0x20,
-    H5D_MPIO_FILTERS = 0x40
+    H5D_MPIO_NO_COLLECTIVE_MAX_CAUSE = 0x40
 } H5D_mpio_no_collective_cause_t;
 
 /********************/
@@ -328,7 +326,7 @@ H5_DLL herr_t H5Pget_cache(hid_t plist_id,
 H5_DLL herr_t H5Pset_mdc_config(hid_t    plist_id,
        H5AC_cache_config_t * config_ptr);
 H5_DLL herr_t H5Pget_mdc_config(hid_t     plist_id,
-       H5AC_cache_config_t * config_ptr);	/* out */
+       H5AC_cache_config_t * config_ptr);    /* out */
 H5_DLL herr_t H5Pset_gc_references(hid_t fapl_id, unsigned gc_ref);
 H5_DLL herr_t H5Pget_gc_references(hid_t fapl_id, unsigned *gc_ref/*out*/);
 H5_DLL herr_t H5Pset_fclose_degree(hid_t fapl_id, H5F_close_degree_t degree);
@@ -404,12 +402,12 @@ H5_DLL herr_t H5Pget_fill_value(hid_t plist_id, hid_t type_id,
      void *value/*out*/);
 H5_DLL herr_t H5Pfill_value_defined(hid_t plist, H5D_fill_value_t *status);
 H5_DLL herr_t H5Pset_alloc_time(hid_t plist_id, H5D_alloc_time_t
-	alloc_time);
+    alloc_time);
 H5_DLL herr_t H5Pget_alloc_time(hid_t plist_id, H5D_alloc_time_t
-	*alloc_time/*out*/);
+    *alloc_time/*out*/);
 H5_DLL herr_t H5Pset_fill_time(hid_t plist_id, H5D_fill_time_t fill_time);
 H5_DLL herr_t H5Pget_fill_time(hid_t plist_id, H5D_fill_time_t
-	*fill_time/*out*/);
+    *fill_time/*out*/);
 
 /* Dataset access property list (DAPL) routines */
 H5_DLL herr_t H5Pset_chunk_cache(hid_t dapl_id, size_t rdcc_nslots,
@@ -422,6 +420,8 @@ H5_DLL herr_t H5Pset_virtual_view(hid_t plist_id, H5D_vds_view_t view);
 H5_DLL herr_t H5Pget_virtual_view(hid_t plist_id, H5D_vds_view_t *view);
 H5_DLL herr_t H5Pset_virtual_printf_gap(hid_t plist_id, hsize_t gap_size);
 H5_DLL herr_t H5Pget_virtual_printf_gap(hid_t plist_id, hsize_t *gap_size);
+H5_DLL herr_t H5Pset_virtual_prefix(hid_t dapl_id, const char* prefix);
+H5_DLL ssize_t H5Pget_virtual_prefix(hid_t dapl_id, char* prefix /*out*/, size_t size);
 H5_DLL herr_t H5Pset_append_flush(hid_t plist_id, unsigned ndims,
     const hsize_t boundary[], H5D_append_cb_t func, void *udata);
 H5_DLL herr_t H5Pget_append_flush(hid_t plist_id, unsigned dims,
diff --git a/src/H5Pstrcpl.c b/src/H5Pstrcpl.c
index 5a09cd7..fb91356 100644
--- a/src/H5Pstrcpl.c
+++ b/src/H5Pstrcpl.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Ptest.c b/src/H5Ptest.c
index f6cc97e..475a164 100644
--- a/src/H5Ptest.c
+++ b/src/H5Ptest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
diff --git a/src/H5R.c b/src/H5R.c
index 43b0a91..ab73b59 100644
--- a/src/H5R.c
+++ b/src/H5R.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -23,16 +21,14 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5HGprivate.h"	/* Global Heaps				*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Rpkg.h"		/* References				*/
-#include "H5Sprivate.h"		/* Dataspaces 				*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5ACprivate.h"        /* Metadata cache                           */
+#include "H5CXprivate.h"        /* API Contexts                             */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Rpkg.h"             /* References                               */
+#include "H5Sprivate.h"         /* Dataspaces                               */
 
 
 /****************/
@@ -49,20 +45,11 @@
 /* Local Prototypes */
 /********************/
 
-static herr_t H5R_create(void *ref, H5G_loc_t *loc, const char *name,
-        H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id);
-static H5S_t * H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref);
-static ssize_t H5R_get_name(H5F_t *file, hid_t lapl_id, hid_t dxpl_id, hid_t id,
-    H5R_type_t ref_type, const void *_ref, char *name, size_t size);
-
 
 /*********************/
 /* Package Variables */
 /*********************/
 
-/* Package initialization variable */
-hbool_t H5_PKG_INIT_VAR = FALSE;
-
 
 /*****************************/
 /* Library Private Variables */
@@ -73,274 +60,6 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
 /* Local Variables */
 /*******************/
 
-/* Reference ID class */
-static const H5I_class_t H5I_REFERENCE_CLS[1] = {{
-    H5I_REFERENCE,		/* ID class value */
-    0,				/* Class flags */
-    0,				/* # of reserved IDs for class */
-    NULL			/* Callback routine for closing objects of this class */
-}};
-
-/* Flag indicating "top" of interface has been initialized */
-static hbool_t H5R_top_package_initialize_s = FALSE;
-
-
-
-/*--------------------------------------------------------------------------
-NAME
-   H5R__init_package -- Initialize interface-specific information
-USAGE
-    herr_t H5R__init_package()
-
-RETURNS
-    Non-negative on success/Negative on failure
-DESCRIPTION
-    Initializes any interface-specific data or routines.
-
---------------------------------------------------------------------------*/
-herr_t
-H5R__init_package(void)
-{
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Initialize the atom group for the file IDs */
-    if(H5I_register_type(H5I_REFERENCE_CLS) < 0)
-	HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to initialize interface")
-
-    /* Mark "top" of interface as initialized, too */
-    H5R_top_package_initialize_s = TRUE;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5R__init_package() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5R_top_term_package
- PURPOSE
-    Terminate various H5R objects
- USAGE
-    void H5R_top_term_package()
- RETURNS
-    void
- DESCRIPTION
-    Release IDs for the atom group, deferring full interface shutdown
-    until later (in H5R_term_package).
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-     Can't report errors...
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-int
-H5R_top_term_package(void)
-{
-    int	n = 0;
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    if(H5R_top_package_initialize_s) {
-	if(H5I_nmembers(H5I_REFERENCE) > 0) {
-	    (void)H5I_clear_type(H5I_REFERENCE, FALSE, FALSE);
-            n++; /*H5I*/
-	} /* end if */
-
-        /* Mark closed */
-        if(0 == n)
-            H5R_top_package_initialize_s = FALSE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(n)
-} /* end H5R_top_term_package() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5R_term_package
- PURPOSE
-    Terminate various H5R objects
- USAGE
-    void H5R_term_package()
- RETURNS
-    void
- DESCRIPTION
-    Release the atom group and any other resources allocated.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-     Can't report errors...
-
-     Finishes shutting down the interface, after H5R_top_term_package()
-     is called
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-int
-H5R_term_package(void)
-{
-    int	n = 0;
-
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    if(H5_PKG_INIT_VAR) {
-        /* Sanity checks */
-        HDassert(0 == H5I_nmembers(H5I_REFERENCE));
-        HDassert(FALSE == H5R_top_package_initialize_s);
-
-        /* Destroy the reference id group */
-        n += (H5I_dec_type_ref(H5I_REFERENCE) > 0);
-
-        /* Mark closed */
-        if(0 == n)
-            H5_PKG_INIT_VAR = FALSE;
-    } /* end if */
-
-    FUNC_LEAVE_NOAPI(n)
-} /* end H5R_term_package() */
-
-
-/*--------------------------------------------------------------------------
- NAME
-    H5R_create
- PURPOSE
-    Creates a particular kind of reference for the user
- USAGE
-    herr_t H5R_create(ref, loc, name, ref_type, space)
-        void *ref;          OUT: Reference created
-        H5G_loc_t *loc;     IN: File location used to locate object pointed to
-        const char *name;   IN: Name of object at location LOC_ID of object
-                                    pointed to
-        H5R_type_t ref_type;    IN: Type of reference to create
-        H5S_t *space;       IN: Dataspace ID with selection, used for Dataset
-                                    Region references.
-
- RETURNS
-    Non-negative on success/Negative on failure
- DESCRIPTION
-    Creates a particular type of reference specified with REF_TYPE, in the
-    space pointed to by REF.  The LOC_ID and NAME are used to locate the object
-    pointed to and the SPACE_ID is used to choose the region pointed to (for
-    Dataset Region references).
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static herr_t
-H5R_create(void *_ref, H5G_loc_t *loc, const char *name, H5R_type_t ref_type, H5S_t *space, hid_t dxpl_id)
-{
-    H5G_loc_t	obj_loc;		/* Group hier. location of object */
-    H5G_name_t  path;            	/* Object group hier. path */
-    H5O_loc_t   oloc;            	/* Object object location */
-    hbool_t     obj_found = FALSE;      /* Object location found */
-    herr_t ret_value = SUCCEED;         /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(_ref);
-    HDassert(loc);
-    HDassert(name);
-    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
-
-    /* Set up object location to fill in */
-    obj_loc.oloc = &oloc;
-    obj_loc.path = &path;
-    H5G_loc_reset(&obj_loc);
-
-    /* Find the object */
-    if(H5G_loc_find(loc, name, &obj_loc, H5P_DEFAULT, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_NOTFOUND, FAIL, "object not found")
-    obj_found = TRUE;
-
-    switch(ref_type) {
-        case H5R_OBJECT:
-        {
-            hobj_ref_t *ref = (hobj_ref_t *)_ref; /* Get pointer to correct type of reference struct */
-
-            *ref = obj_loc.oloc->addr;
-            break;
-        }
-
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;      /* Heap object ID */
-            hdset_reg_ref_t *ref = (hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
-            hssize_t buf_size;  /* Size of buffer needed to serialize selection */
-            uint8_t *p;       /* Pointer to OID to store */
-            uint8_t *buf;     /* Buffer to store serialized selection in */
-            unsigned heapid_found;  /* Flag for non-zero heap ID found */
-            unsigned u;        /* local index */
-
-            /* Set up information for dataset region */
-
-            /* Return any previous heap block to the free list if we are garbage collecting */
-            if(H5F_GC_REF(loc->oloc->file)) {
-                /* Check for an existing heap ID in the reference */
-                for(u = 0, heapid_found = 0, p = (uint8_t *)ref; u < H5R_DSET_REG_REF_BUF_SIZE; u++)
-                    if(p[u] != 0) {
-                        heapid_found = 1;
-                        break;
-                    } /* end if */
-
-                if(heapid_found != 0) {
-/* Return heap block to free list */
-                } /* end if */
-            } /* end if */
-
-            /* Zero the heap ID out, may leak heap space if user is re-using reference and doesn't have garbage collection on */
-            HDmemset(ref, 0, H5R_DSET_REG_REF_BUF_SIZE);
-
-            /* Get the amount of space required to serialize the selection */
-            if((buf_size = H5S_SELECT_SERIAL_SIZE(space)) < 0)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "Invalid amount of space for serializing selection")
-
-            /* Increase buffer size to allow for the dataset OID */
-            buf_size += (hssize_t)sizeof(haddr_t);
-
-            /* Allocate the space to store the serialized information */
-            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
-            if(NULL == (buf = (uint8_t *)H5MM_malloc((size_t)buf_size)))
-                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-
-            /* Serialize information for dataset OID into heap buffer */
-            p = (uint8_t *)buf;
-            H5F_addr_encode(loc->oloc->file, &p, obj_loc.oloc->addr);
-
-            /* Serialize the selection into heap buffer */
-            if(H5S_SELECT_SERIALIZE(space, &p) < 0)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection")
-
-            /* Save the serialized buffer for later */
-            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
-            if(H5HG_insert(loc->oloc->file, dxpl_id, (size_t)buf_size, buf, &hobjid) < 0)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL, "Unable to serialize selection")
-
-            /* Serialize the heap ID and index for storage in the file */
-            p = (uint8_t *)ref;
-            H5F_addr_encode(loc->oloc->file, &p, hobjid.addr);
-            UINT32ENCODE(p, hobjid.idx);
-
-            /* Free the buffer we serialized data in */
-            H5MM_xfree(buf);
-            break;
-        }
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-done:
-    if(obj_found)
-        H5G_loc_free(&obj_loc);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_create() */
-
 
 /*--------------------------------------------------------------------------
  NAME
@@ -380,24 +99,28 @@ H5Rcreate(void *ref, hid_t loc_id, const char *name, H5R_type_t ref_type, hid_t
     H5TRACE5("e", "*xi*sRti", ref, loc_id, name, ref_type, space_id);
 
     /* Check args */
-    if(ref == NULL)
+    if (ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
-    if(H5G_loc(loc_id, &loc) < 0)
+    if (H5G_loc(loc_id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(!name || !*name)
+    if (!name || !*name)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name given")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(ref_type != H5R_OBJECT && ref_type != H5R_DATASET_REGION)
+    if (ref_type != H5R_OBJECT && ref_type != H5R_DATASET_REGION)
         HGOTO_ERROR(H5E_ARGS, H5E_UNSUPPORTED, FAIL, "reference type not supported")
-    if(space_id == (-1) && ref_type == H5R_DATASET_REGION)
+    if (space_id == (-1) && ref_type == H5R_DATASET_REGION)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "reference region dataspace id must be valid")
-    if(space_id != (-1) && (NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE))))
+    if (space_id != (-1) && (NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE))))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, FAIL, "can't set access property list info")
+
     /* Create reference */
-    if((ret_value = H5R_create(ref, &loc, name, ref_type, space, H5AC_ind_read_dxpl_id)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to create reference")
+    if((ret_value = H5R__create(ref, &loc, name, ref_type, space)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCREATE, FAIL, "unable to create reference")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -406,166 +129,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_dereference
- PURPOSE
-    Opens the HDF5 object referenced.
- USAGE
-    hid_t H5R_dereference(ref)
-        H5F_t *file;        IN: File the object being dereferenced is within
-        H5R_type_t ref_type;    IN: Type of reference
-        void *ref;          IN: Reference to open.
-
- RETURNS
-    Valid ID on success, Negative on failure
- DESCRIPTION
-    Given a reference to some object, open that object and return an ID for
-    that object.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-    Currently only set up to work with references to datasets
- EXAMPLES
- REVISION LOG
-    Raymond Lu
-    13 July 2011
-    I added the OAPL_ID parameter for the object being referenced.  It only
-    supports dataset access property list currently.
-
-    M. Scot Breitenfeld
-    3 March 2015
-    Added a check for undefined reference pointer.
---------------------------------------------------------------------------*/
-hid_t
-H5R_dereference(H5F_t *file, hid_t oapl_id, hid_t dxpl_id, H5R_type_t ref_type, const void *_ref, hbool_t app_ref)
-{
-    H5O_loc_t oloc;             /* Object location */
-    H5G_name_t path;            /* Path of object */
-    H5G_loc_t loc;              /* Group location */
-    unsigned rc;		/* Reference count of object */
-    H5O_type_t obj_type;        /* Type of object */
-    hid_t ret_value = H5I_INVALID_HID;  /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(_ref);
-    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
-    HDassert(file);
-
-    /* Initialize the object location */
-    H5O_loc_reset(&oloc);
-    oloc.file = file;
-
-    switch(ref_type) {
-        case H5R_OBJECT:
-            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
-	    if(!H5F_addr_defined(oloc.addr) || oloc.addr == 0)
-	      HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
-	      break;
-            
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;  /* Heap object ID */
-            uint8_t *buf;   /* Buffer to store serialized selection in */
-            const uint8_t *p;           /* Pointer to OID to store */
-
-            /* Get the heap ID for the dataset region */
-            p = (const uint8_t *)_ref;
-            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-            UINT32DECODE(p, hobjid.idx);
-
-            if(!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0)
-	      HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "Undefined reference pointer")
-
-            /* Get the dataset region from the heap (allocate inside routine) */
-            if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)))
-                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
-
-            /* Get the object oid for the dataset */
-            p = buf;
-            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-            /* Free the buffer allocated in H5HG_read() */
-            H5MM_xfree(buf);
-        } /* end case */
-        break;
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-    /* Get the # of links for object, and its type */
-    /* (To check to make certain that this object hasn't been deleted since the reference was created) */
-    if(H5O_get_rc_and_type(&oloc, dxpl_id, &rc, &obj_type) < 0 || 0 == rc)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
-
-    /* Construct a group location for opening the object */
-    H5G_name_reset(&path);
-    loc.oloc = &oloc;
-    loc.path = &path;
-
-    /* Open the object */
-    switch(obj_type) {
-        case H5O_TYPE_GROUP:
-            {
-                H5G_t *group;               /* Pointer to group to open */
-
-                if(NULL == (group = H5G_open(&loc, dxpl_id)))
-                    HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "not found")
-
-                /* Create an atom for the group */
-                if((ret_value = H5I_register(H5I_GROUP, group, app_ref)) < 0) {
-                    H5G_close(group);
-                    HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, FAIL, "can't register group")
-                } /* end if */
-            } /* end case */
-            break;
-
-        case H5O_TYPE_NAMED_DATATYPE:
-            {
-                H5T_t *type;                /* Pointer to datatype to open */
-
-                if(NULL == (type = H5T_open(&loc, dxpl_id)))
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "not found")
-
-                /* Create an atom for the datatype */
-                if((ret_value = H5I_register(H5I_DATATYPE, type, app_ref)) < 0) {
-                    H5T_close(type);
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "can't register datatype")
-                } /* end if */
-            } /* end case */
-            break;
-
-        case H5O_TYPE_DATASET:
-            {
-                H5D_t *dset;                /* Pointer to dataset to open */
-
-                /* Open the dataset */
-                if(NULL == (dset = H5D_open(&loc, oapl_id, dxpl_id)))
-                    HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, FAIL, "not found")
-
-                /* Create an atom for the dataset */
-                if((ret_value = H5I_register(H5I_DATASET, dset, app_ref)) < 0) {
-                    H5D_close(dset);
-                    HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "can't register dataset")
-                } /* end if */
-            } /* end case */
-            break;
-
-        case H5O_TYPE_UNKNOWN:
-        case H5O_TYPE_NTYPES:
-        default:
-            HGOTO_ERROR(H5E_REFERENCE, H5E_BADTYPE, FAIL, "can't identify type of object referenced")
-     } /* end switch */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_dereference() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rdereference2
  PURPOSE
     Opens the HDF5 object referenced.
@@ -596,32 +159,31 @@ H5Rdereference2(hid_t obj_id, hid_t oapl_id, H5R_type_t ref_type, const void *_r
 {
     H5G_loc_t loc;      /* Group location */
     H5F_t *file = NULL; /* File object */
-    hid_t dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
-    hid_t ret_value;
+    hid_t ret_value = H5I_INVALID_HID;	/* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE4("i", "iiRt*x", obj_id, oapl_id, ref_type, _ref);
 
     /* Check args */
-    if(H5G_loc(obj_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(oapl_id < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a property list")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(_ref == NULL)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
-
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&oapl_id, H5P_CLS_DACC, &dxpl_id, obj_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    if (H5G_loc(obj_id, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
+    if (oapl_id < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a property list")
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid reference type")
+    if (_ref == NULL)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid reference pointer")
+
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&oapl_id, H5P_CLS_DACC, obj_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Get the file pointer from the entry */
     file = loc.oloc->file;
 
     /* Create reference */
-    if((ret_value = H5R_dereference(file, oapl_id, dxpl_id, ref_type, _ref, TRUE)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to dereference object")
+    if((ret_value = H5R__dereference(file, oapl_id, ref_type, _ref)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to dereference object")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -630,75 +192,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_get_region
- PURPOSE
-    Retrieves a dataspace with the region pointed to selected.
- USAGE
-    H5S_t *H5R_get_region(file, ref_type, ref)
-        H5F_t *file;        IN: File the object being dereferenced is within
-        void *ref;          IN: Reference to open.
-
- RETURNS
-    Pointer to the dataspace on success, NULL on failure
- DESCRIPTION
-    Given a reference to some object, creates a copy of the dataset pointed
-    to's dataspace and defines a selection in the copy which is the region
-    pointed to.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static H5S_t *
-H5R_get_region(H5F_t *file, hid_t dxpl_id, const void *_ref)
-{
-    H5O_loc_t oloc;             /* Object location */
-    const uint8_t *p;           /* Pointer to OID to store */
-    H5HG_t hobjid;              /* Heap object ID */
-    uint8_t *buf = NULL;        /* Buffer to store serialized selection in */
-    H5S_t *ret_value;
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(_ref);
-    HDassert(file);
-
-    /* Initialize the object location */
-    H5O_loc_reset(&oloc);
-    oloc.file = file;
-
-    /* Get the heap ID for the dataset region */
-    p = (const uint8_t *)_ref;
-    H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-    UINT32DECODE(p, hobjid.idx);
-
-    /* Get the dataset region from the heap (allocate inside routine) */
-    if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, NULL, "Unable to read dataset region information")
-
-    /* Get the object oid for the dataset */
-    p = buf;
-    H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-    /* Open and copy the dataset's dataspace */
-    if((ret_value = H5S_read(&oloc, dxpl_id)) == NULL)
-        HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, NULL, "not found")
-
-    /* Unserialize the selection */
-    if(H5S_SELECT_DESERIALIZE(&ret_value, &p) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, NULL, "can't deserialize selection")
-
-done:
-    /* Free the buffer allocated in H5HG_read() */
-    if(buf)
-        H5MM_xfree(buf);
-
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_get_region() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rget_region
  PURPOSE
     Retrieves a dataspace with the region pointed to selected.
@@ -725,26 +218,26 @@ H5Rget_region(hid_t id, H5R_type_t ref_type, const void *ref)
 {
     H5G_loc_t loc;          /* Object's group location */
     H5S_t *space = NULL;    /* Dataspace object */
-    hid_t ret_value;
+    hid_t ret_value = H5I_INVALID_HID;	/* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "iRt*x", id, ref_type, ref);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type != H5R_DATASET_REGION)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(ref == NULL)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
+    if (H5G_loc(id, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
+    if (ref_type != H5R_DATASET_REGION)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid reference type")
+    if (ref == NULL)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid reference pointer")
 
     /* Get the dataspace with the correct region selected */
-    if((space = H5R_get_region(loc.oloc->file, H5AC_ind_read_dxpl_id, ref)) == NULL)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCREATE, FAIL, "unable to create dataspace")
+    if(NULL == (space = H5R__get_region(loc.oloc->file, ref)))
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, H5I_INVALID_HID, "unable to retrieve dataspace")
 
     /* Atomize */
-    if((ret_value = H5I_register (H5I_DATASPACE, space, TRUE)) < 0)
-        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace atom")
+    if ((ret_value = H5I_register(H5I_DATASPACE, space, TRUE)) < 0)
+        HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register dataspace atom")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -753,92 +246,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_get_obj_type
- PURPOSE
-    Retrieves the type of object that an object reference points to
- USAGE
-    H5O_type_t H5R_get_obj_type(file, ref_type, ref)
-        H5F_t *file;        IN: File the object being dereferenced is within
-        H5R_type_t ref_type;    IN: Type of reference to query
-        void *ref;          IN: Reference to query.
-
- RETURNS
-    Success:	An object type defined in H5Gpublic.h
-    Failure:	H5G_UNKNOWN
- DESCRIPTION
-    Given a reference to some object, this function returns the type of object
-    pointed to.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-herr_t
-H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type,
-    const void *_ref, H5O_type_t *obj_type)
-{
-    H5O_loc_t oloc;             /* Object location */
-    unsigned rc;		/* Reference count of object    */
-    herr_t ret_value = SUCCEED; /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    HDassert(file);
-    HDassert(_ref);
-
-    /* Initialize the symbol table entry */
-    H5O_loc_reset(&oloc);
-    oloc.file = file;
-
-    switch(ref_type) {
-        case H5R_OBJECT:
-            /* Get the object oid */
-            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
-            break;
-
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;      /* Heap object ID */
-            const uint8_t *p;   /* Pointer to reference to decode */
-            uint8_t *buf;       /* Buffer to store serialized selection in */
-
-            /* Get the heap ID for the dataset region */
-            p = (const uint8_t *)_ref;
-            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-            UINT32DECODE(p, hobjid.idx);
-
-            /* Get the dataset region from the heap (allocate inside routine) */
-            if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
-
-            /* Get the object oid for the dataset */
-            p = buf;
-            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-            /* Free the buffer allocated in H5HG_read() */
-            H5MM_xfree(buf);
-        } /* end case */
-        break;
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-    /* Get the # of links for object, and its type */
-    /* (To check to make certain that this object hasn't been deleted since the reference was created) */
-    if(H5O_get_rc_and_type(&oloc, dxpl_id, &rc, obj_type) < 0 || 0 == rc)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5R_get_obj_type() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rget_obj_type2
  PURPOSE
     Retrieves the type of object that an object reference points to
@@ -871,16 +278,16 @@ H5Rget_obj_type2(hid_t id, H5R_type_t ref_type, const void *ref,
     H5TRACE4("e", "iRt*x*Ot", id, ref_type, ref, obj_type);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
+    if (H5G_loc(id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(ref == NULL)
+    if (ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
 
     /* Get the object information */
-    if(H5R_get_obj_type(loc.oloc->file, H5AC_ind_read_dxpl_id, ref_type, ref, obj_type) < 0)
-	HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to determine object type")
+    if(H5R__get_obj_type(loc.oloc->file, ref_type, ref, obj_type) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "unable to determine object type")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -889,106 +296,6 @@ done:
 
 /*--------------------------------------------------------------------------
  NAME
-    H5R_get_name
- PURPOSE
-    Internal routine to determine a name for the object referenced
- USAGE
-    ssize_t H5R_get_name(f, dxpl_id, ref_type, ref, name, size)
-        H5F_t *f;       IN: Pointer to the file that the reference is pointing
-                            into
-        hid_t lapl_id;  IN: LAPL to use for operation
-        hid_t dxpl_id;  IN: DXPL to use for operation
-        hid_t id;       IN: Location ID given for reference
-        H5R_type_t ref_type;    IN: Type of reference
-        void *ref;      IN: Reference to query.
-        char *name;     OUT: Buffer to place name of object referenced
-        size_t size;    IN: Size of name buffer
-
- RETURNS
-    Non-negative length of the path on success, Negative on failure
- DESCRIPTION
-    Given a reference to some object, determine a path to the object
-    referenced in the file.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-    This may not be the only path to that object.
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-static ssize_t
-H5R_get_name(H5F_t *f, hid_t lapl_id, hid_t dxpl_id, hid_t id, H5R_type_t ref_type,
-    const void *_ref, char *name, size_t size)
-{
-    hid_t file_id = H5I_INVALID_HID;    /* ID for file that the reference is in */
-    H5O_loc_t oloc;             /* Object location describing object for reference */
-    ssize_t ret_value = -1;     /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Check args */
-    HDassert(f);
-    HDassert(_ref);
-
-    /* Initialize the object location */
-    H5O_loc_reset(&oloc);
-    oloc.file = f;
-
-    /* Get address for reference */
-    switch(ref_type) {
-        case H5R_OBJECT:
-            oloc.addr = *(const hobj_ref_t *)_ref;
-            break;
-
-        case H5R_DATASET_REGION:
-        {
-            H5HG_t hobjid;  /* Heap object ID */
-            uint8_t *buf;   /* Buffer to store serialized selection in */
-            const uint8_t *p;           /* Pointer to OID to store */
-
-            /* Get the heap ID for the dataset region */
-            p = (const uint8_t *)_ref;
-            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
-            UINT32DECODE(p, hobjid.idx);
-
-            /* Get the dataset region from the heap (allocate inside routine) */
-            if((buf = (uint8_t *)H5HG_read(oloc.file, dxpl_id, &hobjid, NULL, NULL)) == NULL)
-                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
-
-            /* Get the object oid for the dataset */
-            p = buf;
-            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
-
-            /* Free the buffer allocated in H5HG_read() */
-            H5MM_xfree(buf);
-        } /* end case */
-        break;
-
-        case H5R_BADTYPE:
-        case H5R_MAXTYPE:
-        default:
-            HDassert("unknown reference type" && 0);
-            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
-    } /* end switch */
-
-    /* Retrieve file ID for name search */
-    if((file_id = H5I_get_file_id(id, FALSE)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't retrieve file ID")
-
-    /* Get name, length, etc. */
-    if((ret_value = H5G_get_name_by_addr(file_id, lapl_id, dxpl_id, &oloc, name, size)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't determine name")
-
-done:
-    /* Close file ID used for search */
-    if(file_id > 0 && H5I_dec_ref(file_id) < 0)
-        HDONE_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "can't decrement ref count of temp ID")
-
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5R_get_name() */
-
-
-/*--------------------------------------------------------------------------
- NAME
     H5Rget_name
  PURPOSE
     Determines a name for the object referenced
@@ -1032,19 +339,19 @@ H5Rget_name(hid_t id, H5R_type_t ref_type, const void *_ref, char *name,
     H5TRACE5("Zs", "iRt*x*sz", id, ref_type, _ref, name, size);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
+    if (H5G_loc(id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(_ref == NULL)
+    if (_ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
 
     /* Get the file pointer from the entry */
     file = loc.oloc->file;
 
     /* Get name */
-    if((ret_value = H5R_get_name(file, H5P_DEFAULT, H5AC_ind_read_dxpl_id, id, ref_type, _ref, name, size)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to determine object path")
+    if((ret_value = H5R__get_name(file, id, ref_type, _ref, name, size)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "unable to determine object path")
 
 done:
     FUNC_LEAVE_API(ret_value)
diff --git a/src/H5RS.c b/src/H5RS.c
index 5bbdabd..0a3fff0 100644
--- a/src/H5RS.c
+++ b/src/H5RS.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5RSprivate.h b/src/H5RSprivate.h
index 757e0e4..f69624a 100644
--- a/src/H5RSprivate.h
+++ b/src/H5RSprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Rdeprec.c b/src/H5Rdeprec.c
index 9461327..2f41f7d 100644
--- a/src/H5Rdeprec.c
+++ b/src/H5Rdeprec.c
@@ -5,21 +5,17 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
  *
- * Created:	H5Rdeprec.c
- *		September 13 2007
- *		Quincey Koziol <koziol@hdfgroup.org>
+ * Created:     H5Rdeprec.c
  *
- * Purpose:	Deprecated functions from the H5R interface.  These
+ * Purpose:     Deprecated functions from the H5R interface.  These
  *              functions are here for compatibility purposes and may be
  *              removed in the future.  Applications should switch to the
  *              newer APIs.
@@ -37,13 +33,17 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"	/* Metadata cache			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5Oprivate.h"		/* Object headers		  	*/
-#include "H5Rpkg.h"		/* References				*/
-#include "H5Ppublic.h"          /* for using H5P_DATASET_ACCESS_DEFAULT */
+/* Public headers needed by this file */
+#include "H5Ppublic.h"          /* Property lists                           */
+
+/* Private headers needed by this file */
+#include "H5private.h"		/* Generic Functions                        */
+#include "H5ACprivate.h"	/* Metadata cache                           */
+#include "H5CXprivate.h"        /* API Contexts                             */
+#include "H5Eprivate.h"		/* Error handling                           */
+#include "H5Gprivate.h"		/* Groups                                   */
+#include "H5Oprivate.h"		/* Object headers                           */
+#include "H5Rpkg.h"             /* References                               */
 
 
 /****************/
@@ -83,29 +83,22 @@
 
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 
-/*--------------------------------------------------------------------------
- NAME
-    H5Rget_obj_type1
- PURPOSE
-    Retrieves the type of object that an object reference points to
- USAGE
-    H5G_obj_t H5Rget_obj_type1(id, ref_type, ref)
-        hid_t id;       IN: Dataset reference object is in or location ID of
-                            object that the dataset is located within.
-        H5R_type_t ref_type;    IN: Type of reference to query
-        void *ref;          IN: Reference to query.
-
- RETURNS
-    Success:	An object type defined in H5Gpublic.h
-    Failure:	H5G_UNKNOWN
- DESCRIPTION
-    Given a reference to some object, this function returns the type of object
-    pointed to.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------
+ * Function:    H5Rget_obj_type1
+ *
+ * Purpose:     Retrieves the type of the object that an object points to.
+ *
+ * Parameters:
+ *      id          IN: Dataset reference object is in or location ID of
+ *                      object that the dataset is located within
+ *      ref_type    IN: Type of reference to query
+ *      ref         IN: Reference to query
+ *
+ * Return:      Success:	An object type (as defined in H5Gpublic.h)
+ *              Failure:    H5G_UNKNOWN
+ *
+ *-------------------------------------------------------------------------
+ */
 H5G_obj_t
 H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *ref)
 {
@@ -117,16 +110,16 @@ H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *ref)
     H5TRACE3("Go", "iRt*x", id, ref_type, ref);
 
     /* Check args */
-    if(H5G_loc(id, &loc) < 0)
+    if (H5G_loc(id, &loc) < 0)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5G_UNKNOWN, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5G_UNKNOWN, "invalid reference type")
-    if(ref == NULL)
+    if (ref == NULL)
         HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5G_UNKNOWN, "invalid reference pointer")
 
     /* Get the object information */
-    if(H5R_get_obj_type(loc.oloc->file, H5AC_ind_read_dxpl_id, ref_type, ref, &obj_type) < 0)
-	HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, H5G_UNKNOWN, "unable to determine object type")
+    if(H5R__get_obj_type(loc.oloc->file, ref_type, ref, &obj_type) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, H5G_UNKNOWN, "unable to determine object type")
 
     /* Set return value */
     ret_value = H5G_map_obj_type(obj_type);
@@ -136,52 +129,46 @@ done:
 }   /* end H5Rget_obj_type1() */
 
 
-/*--------------------------------------------------------------------------
- NAME
-    H5Rdereference1
- PURPOSE
-    Opens the HDF5 object referenced.
- USAGE
-    hid_t H5Rdereference1(ref)
-        hid_t id;       IN: Dataset reference object is in or location ID of
-                            object that the dataset is located within.
-        H5R_type_t ref_type;    IN: Type of reference to create
-        void *ref;      IN: Reference to open.
-
- RETURNS
-    Valid ID on success, Negative on failure
- DESCRIPTION
-    Given a reference to some object, open that object and return an ID for
-    that object.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
+/*-------------------------------------------------------------------------
+ * Function:    H5Rdereference1
+ *
+ * Purpose:     Opens the HDF5 object referenced.
+ *
+ * Parameters:
+ *      id          IN: Dataset reference object is in or location ID of
+ *                      object that the dataset is located within
+ *      ref_type    IN: Type of reference to create
+ *      ref         IN: Reference to open
+ *
+ * Return:      Success:	Valid HDF5 ID
+ *              Failure:    Negative
+ *
+ *-------------------------------------------------------------------------
+ */
 hid_t
 H5Rdereference1(hid_t obj_id, H5R_type_t ref_type, const void *_ref)
 {
     H5G_loc_t loc;      /* Group location */
     H5F_t *file = NULL; /* File object */
-    hid_t ret_value;
+    hid_t ret_value = H5I_INVALID_HID;	/* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "iRt*x", obj_id, ref_type, _ref);
 
     /* Check args */
-    if(H5G_loc(obj_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
-    if(ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference type")
-    if(_ref == NULL)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid reference pointer")
+    if (H5G_loc(obj_id, &loc) < 0)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
+    if (ref_type <= H5R_BADTYPE || ref_type >= H5R_MAXTYPE)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid reference type")
+    if (_ref == NULL)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid reference pointer")
 
     /* Get the file pointer from the entry */
     file = loc.oloc->file;
 
     /* Create reference */
-    if((ret_value = H5R_dereference(file, H5P_DATASET_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id, ref_type, _ref, TRUE)) < 0)
-        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable dereference object")
+    if((ret_value = H5R__dereference(file, H5P_DATASET_ACCESS_DEFAULT, ref_type, _ref)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, H5I_INVALID_HID, "unable dereference object")
 
 done:
     FUNC_LEAVE_API(ret_value)
diff --git a/src/H5Rint.c b/src/H5Rint.c
new file mode 100644
index 0000000..02f7778
--- /dev/null
+++ b/src/H5Rint.c
@@ -0,0 +1,769 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/****************/
+/* Module Setup */
+/****************/
+
+#include "H5Rmodule.h"          /* This source code file is part of the H5R module */
+
+
+/***********/
+/* Headers */
+/***********/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5ACprivate.h"        /* Metadata cache                           */
+#include "H5Dprivate.h"         /* Datasets                                 */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5HGprivate.h"        /* Global Heaps                             */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5MMprivate.h"        /* Memory management                        */
+#include "H5Oprivate.h"         /* Object headers                           */
+#include "H5Rpkg.h"             /* References                               */
+#include "H5Sprivate.h"         /* Dataspaces                               */
+#include "H5Tprivate.h"         /* Datatypes                                */
+
+
+/****************/
+/* Local Macros */
+/****************/
+
+/******************/
+/* Local Typedefs */
+/******************/
+
+/********************/
+/* Local Prototypes */
+/********************/
+
+/*********************/
+/* Package Variables */
+/*********************/
+
+/* Package initialization variable */
+hbool_t H5_PKG_INIT_VAR = FALSE;
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+/*******************/
+/* Local Variables */
+/*******************/
+
+/* Reference ID class
+ *
+ * NOTE: H5I_REFERENCE is not used by the library and has been deprecated
+ *       with a tentative removal version of 1.12.0. (DER, July 2017)
+ */
+static const H5I_class_t H5I_REFERENCE_CLS[1] = {{
+    H5I_REFERENCE,          /* ID class value                                       */
+    0,                      /* Class flags                                          */
+    0,                      /* # of reserved IDs for class                          */
+    NULL                    /* Callback routine for closing objects of this class   */
+}};
+
+/* Flag indicating "top" of interface has been initialized */
+static hbool_t H5R_top_package_initialize_s = FALSE;
+
+
+/*--------------------------------------------------------------------------
+NAME
+   H5R__init_package -- Initialize interface-specific information
+USAGE
+    herr_t H5R__init_package()
+
+RETURNS
+    Non-negative on success/Negative on failure
+DESCRIPTION
+    Initializes any interface-specific data or routines.
+
+--------------------------------------------------------------------------*/
+herr_t
+H5R__init_package(void)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Initialize the atom group for the file IDs */
+    if (H5I_register_type(H5I_REFERENCE_CLS) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "unable to initialize interface")
+
+    /* Mark "top" of interface as initialized, too */
+    H5R_top_package_initialize_s = TRUE;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5R__init_package() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_top_term_package
+ PURPOSE
+    Terminate various H5R objects
+ USAGE
+    void H5R_top_term_package()
+ RETURNS
+    void
+ DESCRIPTION
+    Release IDs for the atom group, deferring full interface shutdown
+    until later (in H5R_term_package).
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+     Can't report errors...
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+int
+H5R_top_term_package(void)
+{
+    int	n = 0;
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    if (H5R_top_package_initialize_s) {
+        if (H5I_nmembers(H5I_REFERENCE) > 0) {
+            (void)H5I_clear_type(H5I_REFERENCE, FALSE, FALSE);
+            n++;
+	    }
+
+        /* Mark closed */
+        if (0 == n)
+            H5R_top_package_initialize_s = FALSE;
+    }
+
+    FUNC_LEAVE_NOAPI(n)
+} /* end H5R_top_term_package() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R_term_package
+ PURPOSE
+    Terminate various H5R objects
+ USAGE
+    void H5R_term_package()
+ RETURNS
+    void
+ DESCRIPTION
+    Release the atom group and any other resources allocated.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+     Can't report errors...
+
+     Finishes shutting down the interface, after H5R_top_term_package()
+     is called
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+int
+H5R_term_package(void)
+{
+    int	n = 0;
+
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    if (H5_PKG_INIT_VAR) {
+        /* Sanity checks */
+        HDassert(0 == H5I_nmembers(H5I_REFERENCE));
+        HDassert(FALSE == H5R_top_package_initialize_s);
+
+        /* Destroy the reference id group */
+        n += (H5I_dec_type_ref(H5I_REFERENCE) > 0);
+
+        /* Mark closed */
+        if (0 == n)
+            H5_PKG_INIT_VAR = FALSE;
+    }
+
+    FUNC_LEAVE_NOAPI(n)
+} /* end H5R_term_package() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R__create
+ PURPOSE
+    Creates a particular kind of reference for the user
+ USAGE
+    herr_t H5R__create(ref, loc, name, ref_type, space)
+        void *ref;          OUT: Reference created
+        H5G_loc_t *loc;     IN: File location used to locate object pointed to
+        const char *name;   IN: Name of object at location LOC_ID of object
+                                    pointed to
+        H5R_type_t ref_type;    IN: Type of reference to create
+        H5S_t *space;       IN: Dataspace ID with selection, used for Dataset
+                                    Region references.
+
+ RETURNS
+    Non-negative on success/Negative on failure
+ DESCRIPTION
+    Creates a particular type of reference specified with REF_TYPE, in the
+    space pointed to by REF.  The LOC_ID and NAME are used to locate the object
+    pointed to and the SPACE_ID is used to choose the region pointed to (for
+    Dataset Region references).
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+herr_t
+H5R__create(void *_ref, H5G_loc_t *loc, const char *name, H5R_type_t ref_type,
+    H5S_t *space)
+{
+    H5G_loc_t	obj_loc;		/* Group hier. location of object */
+    H5G_name_t  path;            	/* Object group hier. path */
+    H5O_loc_t   oloc;            	/* Object object location */
+    hbool_t     obj_found = FALSE;      /* Object location found */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    HDassert(_ref);
+    HDassert(loc);
+    HDassert(name);
+    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
+
+    /* Set up object location to fill in */
+    obj_loc.oloc = &oloc;
+    obj_loc.path = &path;
+    H5G_loc_reset(&obj_loc);
+
+    /* Find the object */
+    if(H5G_loc_find(loc, name, &obj_loc) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_NOTFOUND, FAIL, "object not found")
+    obj_found = TRUE;
+
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            hobj_ref_t *ref = (hobj_ref_t *)_ref; /* Get pointer to correct type of reference struct */
+
+            *ref = obj_loc.oloc->addr;
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;      /* Heap object ID */
+            hdset_reg_ref_t *ref = (hdset_reg_ref_t *)_ref; /* Get pointer to correct type of reference struct */
+            hssize_t buf_size;  /* Size of buffer needed to serialize selection */
+            uint8_t *p;       /* Pointer to OID to store */
+            uint8_t *buf;     /* Buffer to store serialized selection in */
+            unsigned heapid_found;  /* Flag for non-zero heap ID found */
+            unsigned u;        /* local index */
+
+            /* Set up information for dataset region */
+
+            /* Return any previous heap block to the free list if we are
+             * garbage collecting
+             */
+            if (H5F_GC_REF(loc->oloc->file)) {
+                /* Check for an existing heap ID in the reference */
+                for (u = 0, heapid_found = 0, p = (uint8_t *)ref; u < H5R_DSET_REG_REF_BUF_SIZE; u++)
+                    if (p[u] != 0) {
+                        heapid_found = 1;
+                        break;
+                    }
+
+                if (heapid_found != 0) {
+                    /* Return heap block to free list */
+                }
+            }
+
+            /* Zero the heap ID out, may leak heap space if user is re-using
+             * reference and doesn't have garbage collection turned on
+             */
+            HDmemset(ref, 0, H5R_DSET_REG_REF_BUF_SIZE);
+
+            /* Get the amount of space required to serialize the selection */
+            if ((buf_size = H5S_SELECT_SERIAL_SIZE(space)) < 0)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTINIT, FAIL, "Invalid amount of space for serializing selection")
+
+            /* Increase buffer size to allow for the dataset OID */
+            buf_size += (hssize_t)sizeof(haddr_t);
+
+            /* Allocate the space to store the serialized information */
+            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
+            if (NULL == (buf = (uint8_t *)H5MM_malloc((size_t)buf_size)))
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
+
+            /* Serialize information for dataset OID into heap buffer */
+            p = (uint8_t *)buf;
+            H5F_addr_encode(loc->oloc->file, &p, obj_loc.oloc->addr);
+
+            /* Serialize the selection into heap buffer */
+            if (H5S_SELECT_SERIALIZE(space, &p) < 0)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_CANTCOPY, FAIL, "Unable to serialize selection")
+
+            /* Save the serialized buffer for later */
+            H5_CHECK_OVERFLOW(buf_size, hssize_t, size_t);
+            if(H5HG_insert(loc->oloc->file, (size_t)buf_size, buf, &hobjid) < 0)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_WRITEERROR, FAIL, "Unable to serialize selection")
+
+            /* Serialize the heap ID and index for storage in the file */
+            p = (uint8_t *)ref;
+            H5F_addr_encode(loc->oloc->file, &p, hobjid.addr);
+            UINT32ENCODE(p, hobjid.idx);
+
+            /* Free the buffer we serialized data in */
+            H5MM_xfree(buf);
+            break;
+        } /* end case H5R_DATASET_REGION */
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
+    } /* end switch */
+
+done:
+    if (obj_found)
+        H5G_loc_free(&obj_loc);
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+}   /* end H5R__create() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R__dereference
+ PURPOSE
+    Opens the HDF5 object referenced.
+ USAGE
+    hid_t H5R__dereference(ref, oapl_id, ref_type, ref)
+        H5F_t *file;        IN: File the object being dereferenced is within
+        hid_t oapl_id;      IN: Object access property list ID
+        H5R_type_t ref_type; IN: Type of reference
+        void *ref;          IN: Reference to open.
+
+ RETURNS
+    Valid ID on success, Negative on failure
+ DESCRIPTION
+    Given a reference to some object, open that object and return an ID for
+    that object.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    Currently only set up to work with references to datasets
+ EXAMPLES
+ REVISION LOG
+    Raymond Lu
+    13 July 2011
+    I added the OAPL_ID parameter for the object being referenced.  It only
+    supports dataset access property list currently.
+
+    M. Scot Breitenfeld
+    3 March 2015
+    Added a check for undefined reference pointer.
+--------------------------------------------------------------------------*/
+hid_t
+H5R__dereference(H5F_t *file, hid_t oapl_id, H5R_type_t ref_type,
+    const void *_ref)
+{
+    H5O_loc_t oloc;             /* Object location */
+    H5G_name_t path;            /* Path of object */
+    H5G_loc_t loc;              /* Group location */
+    unsigned rc;		/* Reference count of object */
+    H5O_type_t obj_type;        /* Type of object */
+    hid_t ret_value = H5I_INVALID_HID;  /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    HDassert(_ref);
+    HDassert(ref_type > H5R_BADTYPE && ref_type < H5R_MAXTYPE);
+    HDassert(file);
+
+    /* Initialize the object location */
+    H5O_loc_reset(&oloc);
+    oloc.file = file;
+
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
+            if (!H5F_addr_defined(oloc.addr) || oloc.addr == 0)
+                HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "Undefined reference pointer")
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;  /* Heap object ID */
+            uint8_t *buf;   /* Buffer to store serialized selection in */
+            const uint8_t *p;           /* Pointer to OID to store */
+
+            /* Get the heap ID for the dataset region */
+            p = (const uint8_t *)_ref;
+            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+            UINT32DECODE(p, hobjid.idx);
+
+            if (!H5F_addr_defined(hobjid.addr) || hobjid.addr == 0)
+                HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "Undefined reference pointer")
+
+            /* Get the dataset region from the heap (allocate inside routine) */
+            if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL)))
+                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, H5I_INVALID_HID, "Unable to read dataset region information")
+
+            /* Get the object oid for the dataset */
+            p = buf;
+            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+            /* Free the buffer allocated in H5HG_read() */
+            H5MM_xfree(buf);
+            break;
+        } /* end case H5R_DATASET_REGION */
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, H5I_INVALID_HID, "internal error (unknown reference type)")
+    } /* end switch */
+
+    /* Get the # of links for object, and its type
+     * (To check to make certain that this object hasn't been deleted
+     *  since the reference was created)
+     */
+    if(H5O_get_rc_and_type(&oloc, &rc, &obj_type) < 0 || 0 == rc)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, H5I_INVALID_HID, "dereferencing deleted object")
+
+    /* Construct a group location for opening the object */
+    H5G_name_reset(&path);
+    loc.oloc = &oloc;
+    loc.path = &path;
+
+    /* Open the object */
+    switch (obj_type) {
+        case H5O_TYPE_GROUP:
+        {
+            H5G_t *group;               /* Pointer to group to open */
+
+            if(NULL == (group = H5G_open(&loc)))
+                HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, H5I_INVALID_HID, "not found")
+
+            /* Create an atom for the group */
+            if((ret_value = H5I_register(H5I_GROUP, group, TRUE)) < 0) {
+                H5G_close(group);
+                HGOTO_ERROR(H5E_SYM, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register group")
+            } /* end if */
+
+            break;
+        }
+
+        case H5O_TYPE_NAMED_DATATYPE:
+        {
+            H5T_t *type;                /* Pointer to datatype to open */
+
+            if(NULL == (type = H5T_open(&loc)))
+                HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, H5I_INVALID_HID, "not found")
+
+            /* Create an atom for the datatype */
+            if((ret_value = H5I_register(H5I_DATATYPE, type, TRUE)) < 0) {
+                H5T_close(type);
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register datatype")
+            } /* end if */
+
+            break;
+        }
+
+        case H5O_TYPE_DATASET:
+        {
+            H5D_t *dset;                /* Pointer to dataset to open */
+
+            /* Open the dataset */
+            if(NULL == (dset = H5D_open(&loc, oapl_id)))
+                HGOTO_ERROR(H5E_DATASET, H5E_NOTFOUND, H5I_INVALID_HID, "not found")
+
+            /* Create an atom for the dataset */
+            if((ret_value = H5I_register(H5I_DATASET, dset, TRUE)) < 0) {
+                H5D_close(dset);
+                HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, H5I_INVALID_HID, "can't register dataset")
+            } /* end if */
+
+            break;
+        }
+
+        case H5O_TYPE_UNKNOWN:
+        case H5O_TYPE_NTYPES:
+        default:
+            HGOTO_ERROR(H5E_REFERENCE, H5E_BADTYPE, H5I_INVALID_HID, "can't identify type of object referenced")
+     } /* end switch */
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+}   /* end H5R__dereference() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R__get_region
+ PURPOSE
+    Retrieves a dataspace with the region pointed to selected.
+ USAGE
+    H5S_t *H5R__get_region(file, ref)
+        H5F_t *file;        IN: File the object being dereferenced is within
+        void *ref;          IN: Reference to open.
+
+ RETURNS
+    Pointer to the dataspace on success, NULL on failure
+ DESCRIPTION
+    Given a reference to some object, creates a copy of the dataset pointed
+    to's dataspace and defines a selection in the copy which is the region
+    pointed to.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+H5S_t *
+H5R__get_region(H5F_t *file, const void *_ref)
+{
+    H5O_loc_t oloc;             /* Object location */
+    const uint8_t *p;           /* Pointer to OID to store */
+    H5HG_t hobjid;              /* Heap object ID */
+    uint8_t *buf = NULL;        /* Buffer to store serialized selection in */
+    H5S_t *ret_value;		/* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    HDassert(_ref);
+    HDassert(file);
+
+    /* Initialize the object location */
+    H5O_loc_reset(&oloc);
+    oloc.file = file;
+
+    /* Get the heap ID for the dataset region */
+    p = (const uint8_t *)_ref;
+    H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+    UINT32DECODE(p, hobjid.idx);
+
+    /* Get the dataset region from the heap (allocate inside routine) */
+    if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL)))
+        HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, NULL, "Unable to read dataset region information")
+
+    /* Get the object oid for the dataset */
+    p = buf;
+    H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+    /* Open and copy the dataset's dataspace */
+    if(NULL == (ret_value = H5S_read(&oloc)))
+        HGOTO_ERROR(H5E_DATASPACE, H5E_NOTFOUND, NULL, "not found")
+
+    /* Unserialize the selection */
+    if(H5S_SELECT_DESERIALIZE(&ret_value, &p) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTDECODE, NULL, "can't deserialize selection")
+
+done:
+    /* Free the buffer allocated in H5HG_read() */
+    if(buf)
+        H5MM_xfree(buf);
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+}  /* end H5R__get_region() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R__get_obj_type
+ PURPOSE
+    Retrieves the type of object that an object reference points to
+ USAGE
+    H5O_type_t H5R__get_obj_type(file, ref_type, ref)
+        H5F_t *file;        IN: File the object being dereferenced is within
+        H5R_type_t ref_type;    IN: Type of reference to query
+        void *ref;          IN: Reference to query.
+	H5O_type_t *obj_type;	OUT: The type of the object, set on success
+
+ RETURNS
+    Non-negative on success/Negative on failure
+ DESCRIPTION
+    Given a reference to some object, this function returns the type of object
+    pointed to.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+herr_t
+H5R__get_obj_type(H5F_t *file, H5R_type_t ref_type, const void *_ref,
+    H5O_type_t *obj_type)
+{
+    H5O_loc_t oloc;             /* Object location */
+    unsigned rc;		/* Reference count of object    */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    HDassert(file);
+    HDassert(_ref);
+
+    /* Initialize the symbol table entry */
+    H5O_loc_reset(&oloc);
+    oloc.file = file;
+
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            /* Get the object oid */
+            oloc.addr = *(const hobj_ref_t *)_ref; /* Only object references currently supported */
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;      /* Heap object ID */
+            const uint8_t *p;   /* Pointer to reference to decode */
+            uint8_t *buf;       /* Buffer to store serialized selection in */
+
+            /* Get the heap ID for the dataset region */
+            p = (const uint8_t *)_ref;
+            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+            UINT32DECODE(p, hobjid.idx);
+
+            /* Get the dataset region from the heap (allocate inside routine) */
+            if(NULL == (buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL)))
+                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
+
+            /* Get the object oid for the dataset */
+            p = buf;
+            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+            /* Free the buffer allocated in H5HG_read() */
+            H5MM_xfree(buf);
+
+            break;
+        }
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
+    } /* end switch */
+
+    /* Get the # of links for object, and its type */
+    /* (To check to make certain that this object hasn't been deleted since the reference was created) */
+    if(H5O_get_rc_and_type(&oloc, &rc, obj_type) < 0 || 0 == rc)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_LINKCOUNT, FAIL, "dereferencing deleted object")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+}   /* end H5R__get_obj_type() */
+
+
+/*--------------------------------------------------------------------------
+ NAME
+    H5R__get_name
+ PURPOSE
+    Internal routine to determine a name for the object referenced
+ USAGE
+    ssize_t H5R__get_name(f, ref_type, ref, name, size)
+        H5F_t *f;       IN: Pointer to the file that the reference is pointing
+                            into
+        hid_t lapl_id;  IN: LAPL to use for operation
+        hid_t id;       IN: Location ID given for reference
+        H5R_type_t ref_type;    IN: Type of reference
+        void *ref;      IN: Reference to query.
+        char *name;     OUT: Buffer to place name of object referenced
+        size_t size;    IN: Size of name buffer
+
+ RETURNS
+    Non-negative length of the path on success, Negative on failure
+ DESCRIPTION
+    Given a reference to some object, determine a path to the object
+    referenced in the file.
+ GLOBAL VARIABLES
+ COMMENTS, BUGS, ASSUMPTIONS
+    This may not be the only path to that object.
+ EXAMPLES
+ REVISION LOG
+--------------------------------------------------------------------------*/
+ssize_t
+H5R__get_name(H5F_t *f, hid_t id, H5R_type_t ref_type, const void *_ref,
+    char *name, size_t size)
+{
+    hid_t file_id = H5I_INVALID_HID;    /* ID for file that the reference is in */
+    H5O_loc_t oloc;             /* Object location describing object for reference */
+    ssize_t ret_value = -1;     /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Check args */
+    HDassert(f);
+    HDassert(_ref);
+
+    /* Initialize the object location */
+    H5O_loc_reset(&oloc);
+    oloc.file = f;
+
+    /* Get address for reference */
+    switch (ref_type) {
+        case H5R_OBJECT:
+        {
+            oloc.addr = *(const hobj_ref_t *)_ref;
+            break;
+        }
+
+        case H5R_DATASET_REGION:
+        {
+            H5HG_t hobjid;  /* Heap object ID */
+            uint8_t *buf;   /* Buffer to store serialized selection in */
+            const uint8_t *p;           /* Pointer to OID to store */
+
+            /* Get the heap ID for the dataset region */
+            p = (const uint8_t *)_ref;
+            H5F_addr_decode(oloc.file, &p, &(hobjid.addr));
+            UINT32DECODE(p, hobjid.idx);
+
+            /* Get the dataset region from the heap (allocate inside routine) */
+            if ((buf = (uint8_t *)H5HG_read(oloc.file, &hobjid, NULL, NULL)) == NULL)
+                HGOTO_ERROR(H5E_REFERENCE, H5E_READERROR, FAIL, "Unable to read dataset region information")
+
+            /* Get the object oid for the dataset */
+            p = buf;
+            H5F_addr_decode(oloc.file, &p, &(oloc.addr));
+
+            /* Free the buffer allocated in H5HG_read() */
+            H5MM_xfree(buf);
+
+            break;
+        }
+
+        case H5R_BADTYPE:
+        case H5R_MAXTYPE:
+        default:
+            HDassert("unknown reference type" && 0);
+            HGOTO_ERROR(H5E_REFERENCE, H5E_UNSUPPORTED, FAIL, "internal error (unknown reference type)")
+    } /* end switch */
+
+    /* Retrieve file ID for name search */
+    if ((file_id = H5I_get_file_id(id, FALSE)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't retrieve file ID")
+
+    /* Get name, length, etc. */
+    if ((ret_value = H5G_get_name_by_addr(file_id, &oloc, name, size)) < 0)
+        HGOTO_ERROR(H5E_REFERENCE, H5E_CANTGET, FAIL, "can't determine name")
+
+done:
+    /* Close file ID used for search */
+    if (file_id > 0 && H5I_dec_ref(file_id) < 0)
+        HDONE_ERROR(H5E_REFERENCE, H5E_CANTDEC, FAIL, "can't decrement ref count of temp ID")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5R__get_name() */
+
diff --git a/src/H5Rmodule.h b/src/H5Rmodule.h
index 6799483..678a668 100644
--- a/src/H5Rmodule.h
+++ b/src/H5Rmodule.h
@@ -4,21 +4,15 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/*
- * Programmer:	Quincey Koziol <koziol@hdfgroup.org>
- *		Saturday, September 12, 2015
- *
- * Purpose:	This file contains declarations which define macros for the
- *		H5R package.  Including this header means that the source file
- *		is part of the H5R package.
+/* Purpose: This file contains declarations which define macros for the
+ *          H5R package.  Including this header means that the source file
+ *          is part of the H5R package.
  */
 #ifndef _H5Rmodule_H
 #define _H5Rmodule_H
@@ -33,4 +27,3 @@
 
 #endif /* _H5Rmodule_H */
 
-
diff --git a/src/H5Rpkg.h b/src/H5Rpkg.h
index 8ed8d65..49261eb 100644
--- a/src/H5Rpkg.h
+++ b/src/H5Rpkg.h
@@ -5,19 +5,13 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/*
- * Programmer: Quincey Koziol <koziol@hdfgroup.org>
- *             Thursday, September 13, 2007
- *
- * Purpose:     This file contains declarations which are visible
+/* Purpose:     This file contains declarations which are visible
  *              only within the H5R package. Source files outside the
  *              H5R package should include H5Rprivate.h instead.
  */
@@ -32,7 +26,6 @@
 #include "H5Rprivate.h"
 
 /* Other private headers needed by this file */
-#include "H5Fprivate.h"         /* File access				*/
 
 /**************************/
 /* Package Private Macros */
@@ -52,13 +45,15 @@
 /******************************/
 /* Package Private Prototypes */
 /******************************/
-
-/* General functions */
-H5_DLL herr_t H5R_get_obj_type(H5F_t *file, hid_t dxpl_id, H5R_type_t ref_type,
+H5_DLL herr_t H5R__create(void *ref, H5G_loc_t *loc, const char *name,
+    H5R_type_t ref_type, H5S_t *space);
+H5_DLL hid_t H5R__dereference(H5F_t *file, hid_t dapl_id, H5R_type_t ref_type,
+    const void *_ref);
+H5_DLL H5S_t *H5R__get_region(H5F_t *file, const void *_ref);
+H5_DLL herr_t H5R__get_obj_type(H5F_t *file, H5R_type_t ref_type,
     const void *_ref, H5O_type_t *obj_type);
-H5_DLL hid_t H5R_dereference(H5F_t *file, hid_t dapl_id, hid_t dxpl_id, H5R_type_t ref_type,
-    const void *_ref, hbool_t app_ref);
-
+H5_DLL ssize_t H5R__get_name(H5F_t *file, hid_t id, H5R_type_t ref_type,
+    const void *_ref, char *name, size_t size);
 
 #endif /* _H5Rpkg_H */
 
diff --git a/src/H5Rprivate.h b/src/H5Rprivate.h
index 60df636..8c0ba8f 100644
--- a/src/H5Rprivate.h
+++ b/src/H5Rprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -22,10 +20,31 @@
 #include "H5Rpublic.h"
 
 /* Private headers needed by this file */
+#include "H5Fprivate.h"         /* Files                                    */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5Oprivate.h"         /* Object headers                           */
+#include "H5Sprivate.h"         /* Dataspaces                               */
 
-/* Internal data structures */
 
-/* Private functions */
+/**************************/
+/* Library Private Macros */
+/**************************/
+
+
+/****************************/
+/* Library Private Typedefs */
+/****************************/
+
+
+/*****************************/
+/* Library Private Variables */
+/*****************************/
+
+
+/******************************/
+/* Library Private Prototypes */
+/******************************/
+
 
 #endif  /* _H5Rprivate_H */
 
diff --git a/src/H5Rpublic.h b/src/H5Rpublic.h
index e990661..598bafd 100644
--- a/src/H5Rpublic.h
+++ b/src/H5Rpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -24,40 +22,59 @@
 #include "H5Gpublic.h"
 #include "H5Ipublic.h"
 
-/*
- * Reference types allowed.
- */
-typedef enum {
-    H5R_BADTYPE     =   (-1),   /*invalid Reference Type                     */
-    H5R_OBJECT,                 /*Object reference                           */
-    H5R_DATASET_REGION,         /*Dataset Region Reference                   */
-    H5R_MAXTYPE                 /*highest type (Invalid as true type)	     */
-} H5R_type_t;
+/*****************/
+/* Public Macros */
+/*****************/
 
 /* Note! Be careful with the sizes of the references because they should really
  * depend on the run-time values in the file.  Unfortunately, the arrays need
- * to be defined at compile-time, so we have to go with the worst case sizes for
- * them.  -QAK
+ * to be defined at compile-time, so we have to go with the worst case sizes
+ * for them.  -QAK
+ */
+#define H5R_OBJ_REF_BUF_SIZE        sizeof(haddr_t)
+
+/* 4 is used instead of sizeof(int) to permit portability between the Crays
+ * and other machines (the heap ID is always encoded as an int32 anyway).
+ */
+#define H5R_DSET_REG_REF_BUF_SIZE   (sizeof(haddr_t) + 4)
+
+/*******************/
+/* Public Typedefs */
+/*******************/
+
+/* Reference types */
+typedef enum H5R_type_t {
+    H5R_BADTYPE     =   (-1),   /* Invalid Reference Type               */
+    H5R_OBJECT,                 /* Object reference                     */
+    H5R_DATASET_REGION,         /* Dataset Region Reference             */
+    H5R_MAXTYPE                 /* Highest type (Invalid as true type)  */
+} H5R_type_t;
+
+/* Object reference structure for user's code
+ * This needs to be large enough to store largest haddr_t on a worst case
+ * machine (8 bytes currently).
+ */
+typedef haddr_t hobj_ref_t;
+
+/* Dataset Region reference structure for user's code
+ * (Buffer to store heap ID and index)
+ * This needs to be large enough to store largest haddr_t in a worst case
+ * machine (8 bytes currently) plus an int
  */
-#define H5R_OBJ_REF_BUF_SIZE    sizeof(haddr_t)
-/* Object reference structure for user's code */
-typedef haddr_t hobj_ref_t; /* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) */
+typedef unsigned char hdset_reg_ref_t[H5R_DSET_REG_REF_BUF_SIZE];
 
-#define H5R_DSET_REG_REF_BUF_SIZE    (sizeof(haddr_t)+4)
-/* 4 is used instead of sizeof(int) to permit portability between
-   the Crays and other machines (the heap ID is always encoded as an int32 anyway)
-*/
-/* Dataset Region reference structure for user's code */
-typedef unsigned char hdset_reg_ref_t[H5R_DSET_REG_REF_BUF_SIZE];/* Buffer to store heap ID and index */
-/* Needs to be large enough to store largest haddr_t in a worst case machine (ie. 8 bytes currently) plus an int */
+/********************/
+/* Public Variables */
+/********************/
 
-/* Publicly visible data structures */
+/*********************/
+/* Public Prototypes */
+/*********************/
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-/* Functions in H5R.c */
 H5_DLL herr_t H5Rcreate(void *ref, hid_t loc_id, const char *name,
 			 H5R_type_t ref_type, hid_t space_id);
 H5_DLL hid_t H5Rdereference2(hid_t obj_id, hid_t oapl_id, H5R_type_t ref_type, const void *ref);
@@ -65,7 +82,7 @@ H5_DLL hid_t H5Rget_region(hid_t dataset, H5R_type_t ref_type, const void *ref);
 H5_DLL herr_t H5Rget_obj_type2(hid_t id, H5R_type_t ref_type, const void *_ref,
     H5O_type_t *obj_type);
 H5_DLL ssize_t H5Rget_name(hid_t loc_id, H5R_type_t ref_type, const void *ref,
-    char *name/*out*/, size_t size);
+    char *name /*out*/, size_t size);
 
 /* Symbols defined for compatibility with previous versions of the HDF5 API.
  *
@@ -73,12 +90,6 @@ H5_DLL ssize_t H5Rget_name(hid_t loc_id, H5R_type_t ref_type, const void *ref,
  */
 #ifndef H5_NO_DEPRECATED_SYMBOLS
 
-/* Macros */
-
-
-/* Typedefs */
-
-
 /* Function prototypes */
 H5_DLL H5G_obj_t H5Rget_obj_type1(hid_t id, H5R_type_t ref_type, const void *_ref);
 H5_DLL hid_t H5Rdereference1(hid_t obj_id, H5R_type_t ref_type, const void *ref);
diff --git a/src/H5S.c b/src/H5S.c
index 6183a7d..3d09fa0 100644
--- a/src/H5S.c
+++ b/src/H5S.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -59,6 +57,12 @@ static htri_t H5S_is_simple(const H5S_t *sdim);
 /* Package initialization variable */
 hbool_t H5_PKG_INIT_VAR = FALSE;
 
+/* Format version bounds for dataspace */
+const unsigned H5O_sdspace_ver_bounds[] = {
+    H5O_SDSPACE_VERSION_1,      /* H5F_LIBVER_EARLIEST */
+    H5O_SDSPACE_VERSION_2,      /* H5F_LIBVER_V18 */
+    H5O_SDSPACE_VERSION_LATEST  /* H5F_LIBVER_LATEST */
+};
 
 /*****************************/
 /* Library Private Variables */
@@ -86,6 +90,7 @@ static const H5I_class_t H5I_DATASPACE_CLS[1] = {{
     (H5I_free_t)H5S_close	/* Callback routine for closing objects of this class */
 }};
 
+
 /* Flag indicating "top" of interface has been initialized */
 static hbool_t H5S_top_package_initialize_s = FALSE;
 
@@ -1069,7 +1074,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5S_write(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned update_flags, H5S_t *ds)
+H5S_write(H5F_t *f, H5O_t *oh, unsigned update_flags, H5S_t *ds)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
@@ -1081,7 +1086,7 @@ H5S_write(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned update_flags, H5S_t *ds)
     HDassert(H5S_GET_EXTENT_TYPE(ds) >= 0);
 
     /* Write the current dataspace extent to the dataspace message */
-    if(H5O_msg_write_oh(f, dxpl_id, oh, H5O_SDSPACE_ID, 0, update_flags, &(ds->extent)) < 0)
+    if(H5O_msg_write_oh(f, oh, H5O_SDSPACE_ID, 0, update_flags, &(ds->extent)) < 0)
         HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "can't update simple dataspace message")
 
 done:
@@ -1110,7 +1115,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5S_append(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5S_t *ds)
+H5S_append(H5F_t *f, H5O_t *oh, H5S_t *ds)
 {
     herr_t ret_value = SUCCEED;   /* Return value */
 
@@ -1122,7 +1127,7 @@ H5S_append(H5F_t *f, hid_t dxpl_id, H5O_t *oh, H5S_t *ds)
     HDassert(H5S_GET_EXTENT_TYPE(ds) >= 0);
 
     /* Add the dataspace message to the object header */
-    if(H5O_msg_append_oh(f, dxpl_id, oh, H5O_SDSPACE_ID, 0, 0, &(ds->extent)) < 0)
+    if(H5O_msg_append_oh(f, oh, H5O_SDSPACE_ID, 0, 0, &(ds->extent)) < 0)
         HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, FAIL, "can't add simple dataspace message")
 
 done:
@@ -1145,7 +1150,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5S_t *
-H5S_read(const H5O_loc_t *loc, hid_t dxpl_id)
+H5S_read(const H5O_loc_t *loc)
 {
     H5S_t	*ds = NULL;             /* Dataspace to return */
     H5S_t       *ret_value = NULL;      /* Return value */
@@ -1158,7 +1163,7 @@ H5S_read(const H5O_loc_t *loc, hid_t dxpl_id)
     if(NULL == (ds = H5FL_CALLOC(H5S_t)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
-    if(H5O_msg_read(loc, H5O_SDSPACE_ID, &(ds->extent), dxpl_id) == NULL)
+    if(NULL == H5O_msg_read(loc, H5O_SDSPACE_ID, &(ds->extent)))
         HGOTO_ERROR(H5E_DATASPACE, H5E_CANTINIT, NULL, "unable to load dataspace info from dataset header")
 
     /* Default to entire dataspace being selected */
@@ -1545,7 +1550,7 @@ H5Sencode(hid_t obj_id, void *buf, size_t *nalloc)
     H5TRACE3("e", "i*x*z", obj_id, buf, nalloc);
 
     /* Check argument and retrieve object */
-    if (NULL==(dspace=(H5S_t *)H5I_object_verify(obj_id, H5I_DATASPACE)))
+    if (NULL == (dspace = (H5S_t *)H5I_object_verify(obj_id, H5I_DATASPACE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
 
     if(H5S_encode(dspace, (unsigned char **)&buf, nalloc)<0)
@@ -1724,8 +1729,8 @@ H5S_decode(const unsigned char **p)
 
     /* Decode the extent part of dataspace */
     /* (pass mostly bogus file pointer and bogus DXPL) */
-    if((extent = (H5S_extent_t *)H5O_msg_decode(f, H5P_DEFAULT, NULL, H5O_SDSPACE_ID, pp))==NULL)
-	HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDECODE, NULL, "can't decode object")
+    if(NULL == (extent = (H5S_extent_t *)H5O_msg_decode(f, NULL, H5O_SDSPACE_ID, extent_size, pp)))
+        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDECODE, NULL, "can't decode object")
     pp += extent_size;
 
     /* Copy the extent into dataspace structure */
@@ -2168,93 +2173,40 @@ H5S_extent_nelem(const H5S_extent_t *ext)
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5S_set_latest_version
+ * Function:    H5S_set_version
  *
- * Purpose:     Set the encoding for a dataspace to the latest version.
+ * Purpose:     Set the version to encode a dataspace with.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:  Quincey Koziol
- *              Tuesday, July 24, 2007
+ * Programmer:  Vailin Choi; December 2017
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5S_set_latest_version(H5S_t *ds)
+H5S_set_version(H5F_t *f, H5S_t *ds)
 {
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
-
-    /* Sanity check */
-    HDassert(ds);
-
-    /* Set encoding of extent to latest version */
-    ds->extent.version = H5O_SDSPACE_VERSION_LATEST;
-
-    FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5S_set_latest_version() */
-
-#ifndef H5_NO_DEPRECATED_SYMBOLS
-
-/*-------------------------------------------------------------------------
- * Function:	H5S_extend
- *
- * Purpose:	Extend the dimensions of a dataspace.
- *
- * Return:	Success:	Number of dimensions whose size increased.
- *
- *		Failure:	Negative
- *
- * Programmer:	Robb Matzke
- *		Friday, January 30, 1998
- *
- *-------------------------------------------------------------------------
- */
-int
-H5S_extend(H5S_t *space, const hsize_t *size)
-{
-    unsigned	u;
-    int	ret_value = 0;
+    unsigned version;           /* Message version */
+    herr_t ret_value = SUCCEED; /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    /* Check args */
-    HDassert(space && H5S_SIMPLE == H5S_GET_EXTENT_TYPE(space));
-    HDassert(size);
-
-    /* Check through all the dimensions to see if modifying the dataspace is allowed */
-    for(u = 0; u < space->extent.rank; u++)
-        if(space->extent.size[u] < size[u]) {
-            if(space->extent.max && H5S_UNLIMITED != space->extent.max[u] &&
-                    space->extent.max[u] < size[u])
-                HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "dimension cannot be increased")
-            ret_value++;
-        } /* end if */
-
-    /* Update */
-    if(ret_value) {
-        hsize_t nelem;  /* Number of elements in extent */
-
-        /* Change the dataspace size & re-compute the number of elements in the extent */
-        for(u = 0, nelem = 1; u < space->extent.rank; u++) {
-            if(space->extent.size[u] < size[u])
-                space->extent.size[u] = size[u];
+    /* Sanity check */
+    HDassert(f);
+    HDassert(ds);
 
-            nelem *= space->extent.size[u];
-        } /* end for */
-        space->extent.nelem = nelem;
+    /* Upgrade to the version indicated by the file's low bound if higher */
+    version = MAX(ds->extent.version, H5O_sdspace_ver_bounds[H5F_LOW_BOUND(f)]);
 
-        /* If the selection is 'all', update the number of elements selected */
-        if(H5S_GET_SELECT_TYPE(space) == H5S_SEL_ALL)
-            if(H5S_select_all(space, FALSE) < 0)
-                HGOTO_ERROR(H5E_DATASPACE, H5E_CANTDELETE, FAIL, "can't change selection")
+    /* Version bounds check */
+    if(version > H5O_sdspace_ver_bounds[H5F_HIGH_BOUND(f)])
+        HGOTO_ERROR(H5E_DATASET, H5E_BADRANGE, FAIL, "Dataspace version out of bounds")
 
-        /* Mark the dataspace as no longer shared if it was before */
-        if(H5O_msg_reset_share(H5O_SDSPACE_ID, space) < 0)
-            HGOTO_ERROR(H5E_DATASPACE, H5E_CANTRESET, FAIL, "can't stop sharing dataspace")
-    } /* end if */
+    /* Set the message version */
+    ds->extent.version = version;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5S_extend() */
-#endif /* H5_NO_DEPRECATED_SYMBOLS */
+
+} /* end H5S_set_version() */
 
diff --git a/src/H5SL.c b/src/H5SL.c
index f9d7654..c0934ca 100644
--- a/src/H5SL.c
+++ b/src/H5SL.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5SLmodule.h b/src/H5SLmodule.h
index d5bfbc2..34f08a1 100644
--- a/src/H5SLmodule.h
+++ b/src/H5SLmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5SLprivate.h b/src/H5SLprivate.h
index 856099b..1393a25 100644
--- a/src/H5SLprivate.h
+++ b/src/H5SLprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5SM.c b/src/H5SM.c
index 221409d..1bf6301 100644
--- a/src/H5SM.c
+++ b/src/H5SM.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -43,7 +41,7 @@
 /* Local Typedefs */
 /******************/
 
-/* Udata struct for calls to H5SM_read_iter_op */
+/* Udata struct for calls to H5SM__read_iter_op */
 typedef struct H5SM_read_udata_t {
     H5F_t *file;                    /* File in which sharing is happening (in) */
     H5O_msg_crt_idx_t idx;          /* Creation index of this message (in) */
@@ -55,31 +53,28 @@ typedef struct H5SM_read_udata_t {
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5SM_create_index(H5F_t *f, H5SM_index_header_t *header,
-                                hid_t dxpl_id);
-static herr_t H5SM_delete_index(H5F_t *f, H5SM_index_header_t *header,
-                                hid_t dxpl_id, hbool_t delete_heap);
-static haddr_t H5SM_create_list(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id);
+static herr_t H5SM__create_index(H5F_t *f, H5SM_index_header_t *header);
+static herr_t H5SM__delete_index(H5F_t *f, H5SM_index_header_t *header,
+    hbool_t delete_heap);
+static haddr_t H5SM__create_list(H5F_t *f, H5SM_index_header_t *header);
 static herr_t H5SM__find_in_list(const H5SM_list_t *list, const H5SM_mesg_key_t *key, 
-                                size_t *empty_pos, size_t *list_pos);
-static herr_t H5SM_convert_list_to_btree(H5F_t * f, H5SM_index_header_t * header,
-                H5SM_list_t **_list, H5HF_t *fheap, H5O_t *open_oh, hid_t dxpl_id);
-static herr_t H5SM_convert_btree_to_list(H5F_t * f, H5SM_index_header_t * header, hid_t dxpl_id);
-static herr_t H5SM_incr_ref(void *record, void *_op_data, hbool_t *changed);
-static herr_t H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    H5SM_index_header_t *header, hbool_t defer, unsigned type_id, void *mesg,
-    unsigned *cache_flags_ptr);
-static herr_t H5SM_decr_ref(void *record, void *op_data, hbool_t *changed);
-static herr_t H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    H5SM_index_header_t *header, const H5O_shared_t * mesg,
-    unsigned *cache_flags, void ** /*out*/ encoded_mesg);
-static herr_t H5SM_type_to_flag(unsigned type_id, unsigned *type_flag);
-static herr_t H5SM_read_iter_op(H5O_t *oh, H5O_mesg_t *mesg, unsigned sequence,
+    size_t *empty_pos, size_t *list_pos);
+static herr_t H5SM__convert_list_to_btree(H5F_t * f, H5SM_index_header_t * header,
+    H5SM_list_t **_list, H5HF_t *fheap, H5O_t *open_oh);
+static herr_t H5SM__convert_btree_to_list(H5F_t * f, H5SM_index_header_t * header);
+static herr_t H5SM__incr_ref(void *record, void *_op_data, hbool_t *changed);
+static herr_t H5SM__write_mesg(H5F_t *f, H5O_t *open_oh, H5SM_index_header_t *header,
+    hbool_t defer, unsigned type_id, void *mesg, unsigned *cache_flags_ptr);
+static herr_t H5SM__decr_ref(void *record, void *op_data, hbool_t *changed);
+static herr_t H5SM__delete_from_index(H5F_t *f, H5O_t *open_oh, H5SM_index_header_t *header,
+    const H5O_shared_t * mesg, unsigned *cache_flags, size_t * /*out*/ mesg_size,
+    void ** /*out*/ encoded_mesg);
+static herr_t H5SM__type_to_flag(unsigned type_id, unsigned *type_flag);
+static herr_t H5SM__read_iter_op(H5O_t *oh, H5O_mesg_t *mesg, unsigned sequence,
     unsigned *oh_modified, void *_udata);
-static herr_t H5SM_read_mesg_fh_cb(const void *obj, size_t obj_len, void *_udata);
-static herr_t H5SM_read_mesg(H5F_t *f, const H5SM_sohm_t *mesg, H5HF_t *fheap,
-               H5O_t * open_oh, hid_t dxpl_id, size_t *encoding_size /*out*/,
-               void ** encoded_mesg /*out*/);
+static herr_t H5SM__read_mesg_fh_cb(const void *obj, size_t obj_len, void *_udata);
+static herr_t H5SM__read_mesg(H5F_t *f, const H5SM_sohm_t *mesg, H5HF_t *fheap,
+    H5O_t * open_oh, size_t *encoding_size /*out*/, void ** encoded_mesg /*out*/);
 
 
 /*********************/
@@ -123,12 +118,11 @@ H5FL_ARR_DEFINE(H5SM_sohm_t, H5O_SHMESG_MAX_LIST_SIZE);
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_init(H5F_t *f, H5P_genplist_t * fc_plist, const H5O_loc_t *ext_loc, hid_t dxpl_id)
+H5SM_init(H5F_t *f, H5P_genplist_t * fc_plist, const H5O_loc_t *ext_loc)
 {
     H5O_shmesg_table_t sohm_table;      /* SOHM message for superblock extension */
     H5SM_master_table_t *table = NULL;  /* SOHM master table for file */
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
-    H5AC_ring_t ring, orig_ring = H5AC_RING_INV;      /* Original ring value */
+    H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
     haddr_t table_addr = HADDR_UNDEF;   /* Address of SOHM master table in file */
     unsigned list_max, btree_min;       /* Phase change limits for SOHM indices */
     unsigned index_type_flags[H5O_SHMESG_MAX_NINDEXES]; /* Messages types stored in each index */
@@ -137,15 +131,14 @@ H5SM_init(H5F_t *f, H5P_genplist_t * fc_plist, const H5O_loc_t *ext_loc, hid_t d
     unsigned x;                         /* Local index variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     HDassert(f);
     /* File should not already have a SOHM table */
     HDassert(!H5F_addr_defined(H5F_SOHM_ADDR(f)));
 
     /* Set the ring type in the DXPL */
-    if(H5AC_set_ring(dxpl_id, H5AC_RING_USER, &dxpl, &orig_ring) < 0)
-        HGOTO_ERROR(H5E_SOHM, H5E_CANTSET, FAIL, "unable to set ring value")
+    H5AC_set_ring(H5AC_RING_USER, &orig_ring);
 
     /* Initialize master table */
     if(NULL == (table = H5FL_CALLOC(H5SM_master_table_t)))
@@ -215,11 +208,11 @@ H5SM_init(H5F_t *f, H5P_genplist_t * fc_plist, const H5O_loc_t *ext_loc, hid_t d
     } /* end for */
 
     /* Allocate space for the table on disk */
-    if(HADDR_UNDEF == (table_addr = H5MF_alloc(f, H5FD_MEM_SOHM_TABLE, dxpl_id, (hsize_t)table->table_size)))
+    if(HADDR_UNDEF == (table_addr = H5MF_alloc(f, H5FD_MEM_SOHM_TABLE, (hsize_t)table->table_size)))
 	HGOTO_ERROR(H5E_SOHM, H5E_NOSPACE, FAIL, "file allocation failed for SOHM table")
 
     /* Cache the new table */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_SOHM_TABLE, table_addr, table, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_SOHM_TABLE, table_addr, table, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTINS, FAIL, "can't add SOHM table to cache")
 
     /* Record the address of the master table in the file */
@@ -232,35 +225,33 @@ H5SM_init(H5F_t *f, H5P_genplist_t * fc_plist, const H5O_loc_t *ext_loc, hid_t d
         H5F_SET_STORE_MSG_CRT_IDX(f, TRUE);
 
     /* Set the ring type to superblock extension */
-    ring = H5AC_RING_SBE;
-    if((H5P_set(dxpl, H5AC_RING_NAME, &ring)) < 0)
-        HGOTO_ERROR(H5E_SOHM, H5E_CANTSET, FAIL, "unable to set property value")
+    H5AC_set_ring(H5AC_RING_SBE, NULL);
 
     /* Write shared message information to the superblock extension */
     sohm_table.addr = H5F_SOHM_ADDR(f);
     sohm_table.version = H5F_SOHM_VERS(f);
     sohm_table.nindexes = H5F_SOHM_NINDEXES(f);
-    if(H5O_msg_create(ext_loc, H5O_SHMESG_ID, H5O_MSG_FLAG_CONSTANT | H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &sohm_table, dxpl_id) < 0)
+    if(H5O_msg_create(ext_loc, H5O_SHMESG_ID, H5O_MSG_FLAG_CONSTANT | H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, &sohm_table) < 0)
         HGOTO_ERROR(H5E_SOHM, H5E_CANTINIT, FAIL, "unable to update SOHM header message")
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_SOHM, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     if(ret_value < 0) {
         if(table_addr != HADDR_UNDEF)
-            H5MF_xfree(f, H5FD_MEM_SOHM_TABLE, dxpl_id, table_addr, (hsize_t)table->table_size);
+            H5MF_xfree(f, H5FD_MEM_SOHM_TABLE, table_addr, (hsize_t)table->table_size);
         if(table != NULL)
             table = H5FL_FREE(H5SM_master_table_t, table);
     } /* end if */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_init() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_type_to_flag
+ * Function:    H5SM__type_to_flag
  *
  * Purpose:     Get the shared message flag for a given message type.
  *
@@ -272,11 +263,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_type_to_flag(unsigned type_id, unsigned *type_flag)
+H5SM__type_to_flag(unsigned type_id, unsigned *type_flag)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Translate the H5O type_id into an H5SM type flag */
     switch(type_id) {
@@ -298,7 +289,7 @@ H5SM_type_to_flag(unsigned type_id, unsigned *type_flag)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5SM_type_to_flag() */
+} /* end H5SM__type_to_flag() */
 
 
 /*-------------------------------------------------------------------------
@@ -327,7 +318,7 @@ H5SM_get_index(const H5SM_master_table_t *table, unsigned type_id)
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Translate the H5O type_id into an H5SM type flag */
-    if(H5SM_type_to_flag(type_id, &type_flag) < 0)
+    if(H5SM__type_to_flag(type_id, &type_flag) < 0)
         HGOTO_ERROR(H5E_SOHM, H5E_CANTGET, FAIL, "can't map message type to flag")
 
     /* Search the indexes until we find one that matches this flag or we've
@@ -358,17 +349,17 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5SM_type_shared(H5F_t *f, unsigned type_id, hid_t dxpl_id)
+H5SM_type_shared(H5F_t *f, unsigned type_id)
 {
     H5SM_master_table_t *table = NULL;  /* Shared object master table */
     unsigned type_flag;                 /* Flag corresponding to message type */
     size_t u;                           /* Local index variable */
     htri_t ret_value = FALSE;           /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_NOINIT_TAG(H5AC__SOHM_TAG)
 
     /* Translate the H5O type_id into an H5SM type flag */
-    if(H5SM_type_to_flag(type_id, &type_flag) < 0)
+    if(H5SM__type_to_flag(type_id, &type_flag) < 0)
         HGOTO_ERROR(H5E_SOHM, H5E_CANTGET, FAIL, "can't map message type to flag")
 
     /* Look up the master SOHM table */
@@ -378,7 +369,7 @@ H5SM_type_shared(H5F_t *f, unsigned type_id, hid_t dxpl_id)
         /* Set up user data for callback */
         cache_udata.f = f;
 
-        if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
     } /* end if */
     else
@@ -394,10 +385,10 @@ H5SM_type_shared(H5F_t *f, unsigned type_id, hid_t dxpl_id)
 
 done:
     /* Release the master SOHM table */
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_type_shared() */
 
 
@@ -415,14 +406,14 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_get_fheap_addr(H5F_t *f, hid_t dxpl_id, unsigned type_id, haddr_t *fheap_addr)
+H5SM_get_fheap_addr(H5F_t *f, unsigned type_id, haddr_t *fheap_addr)
 {
     H5SM_master_table_t *table = NULL;  /* Shared object master table */
     H5SM_table_cache_ud_t cache_udata;  /* User-data for callback */
     ssize_t index_num;                  /* Which index */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     /* Sanity checks */
     HDassert(f);
@@ -432,7 +423,7 @@ H5SM_get_fheap_addr(H5F_t *f, hid_t dxpl_id, unsigned type_id, haddr_t *fheap_ad
     cache_udata.f = f;
 
     /* Look up the master SOHM table */
-    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
     /* Look up index for message type */
@@ -444,15 +435,15 @@ H5SM_get_fheap_addr(H5F_t *f, hid_t dxpl_id, unsigned type_id, haddr_t *fheap_ad
 
 done:
     /* Release the master SOHM table */
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_get_fheap_addr() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_create_index
+ * Function:    H5SM__create_index
  *
  * Purpose:     Allocates storage for an index, populating the HEADER struct.
  *
@@ -464,14 +455,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_create_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
+H5SM__create_index(H5F_t *f, H5SM_index_header_t *header)
 {
     H5HF_create_t fheap_cparam;         /* Fractal heap creation parameters */
     H5HF_t *fheap = NULL;               /* Fractal heap handle */
     H5B2_t *bt2 = NULL;                 /* v2 B-tree handle for index */
     herr_t ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity check */
     HDassert(header);
@@ -483,7 +474,7 @@ H5SM_create_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
         haddr_t list_addr = HADDR_UNDEF;    /* Address of SOHM list */
 
         /* Create the list index */
-        if((list_addr = H5SM_create_list(f, header, dxpl_id)) == HADDR_UNDEF)
+        if(HADDR_UNDEF == (list_addr = H5SM__create_list(f, header)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTCREATE, FAIL, "list creation failed for SOHM index")
 
         /* Set the index type & address */
@@ -501,7 +492,7 @@ H5SM_create_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
         bt2_cparam.rrec_size = (uint32_t)H5SM_SOHM_ENTRY_SIZE(f);
         bt2_cparam.split_percent = H5SM_B2_SPLIT_PERCENT;
         bt2_cparam.merge_percent = H5SM_B2_MERGE_PERCENT;
-        if(NULL == (bt2 = H5B2_create(f, dxpl_id, &bt2_cparam, f)))
+        if(NULL == (bt2 = H5B2_create(f, &bt2_cparam, f)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTCREATE, FAIL, "B-tree creation failed for SOHM index")
 
         /* Retrieve the v2 B-tree's address in the file */
@@ -523,7 +514,7 @@ H5SM_create_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
     fheap_cparam.checksum_dblocks = H5O_FHEAP_CHECKSUM_DBLOCKS;
     fheap_cparam.id_len = 0;
     fheap_cparam.max_man_size = H5O_FHEAP_MAX_MAN_SIZE;
-    if(NULL == (fheap = H5HF_create(f, dxpl_id, &fheap_cparam)))
+    if(NULL == (fheap = H5HF_create(f, &fheap_cparam)))
         HGOTO_ERROR(H5E_SOHM, H5E_CANTINIT, FAIL, "unable to create fractal heap")
 
     if(H5HF_get_heap_addr(fheap, &(header->heap_addr)) < 0)
@@ -542,17 +533,17 @@ H5SM_create_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for SOHM index")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5SM_create_index */
+} /* end H5SM__create_index */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_delete_index
+ * Function:    H5SM__delete_index
  *
  * Purpose:     De-allocates storage for an index whose header is HEADER.
  *
@@ -571,12 +562,11 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_delete_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id,
-    hbool_t delete_heap)
+H5SM__delete_index(H5F_t *f, H5SM_index_header_t *header, hbool_t delete_heap)
 {
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Determine whether index is a list or a B-tree. */
     if(header->index_type == H5SM_LIST) {
@@ -593,7 +583,7 @@ H5SM_delete_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id,
             HDassert(!(index_status & H5AC_ES__IS_PROTECTED));
 
             /* Evict the index list from the metadata cache */
-            if(H5AC_expunge_entry(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, H5AC__FREE_FILE_SPACE_FLAG) < 0)
+            if(H5AC_expunge_entry(f, H5AC_SOHM_LIST, header->index_addr, H5AC__FREE_FILE_SPACE_FLAG) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTREMOVE, FAIL, "unable to remove list index from cache")
         } /* end if */
     } /* end if */
@@ -601,7 +591,7 @@ H5SM_delete_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id,
         HDassert(header->index_type == H5SM_BTREE);
 
         /* Delete the B-tree. */
-        if(H5B2_delete(f, dxpl_id, header->index_addr, f, NULL, NULL) < 0)
+        if(H5B2_delete(f, header->index_addr, f, NULL, NULL) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "unable to delete B-tree")
 
         /* Revert to list unless B-trees can have zero records */
@@ -611,7 +601,7 @@ H5SM_delete_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id,
 
     /* Free the index's heap if requested. */
     if(delete_heap == TRUE) {
-        if(H5HF_delete(f, dxpl_id, header->heap_addr) < 0)
+        if(H5HF_delete(f, header->heap_addr) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "unable to delete fractal heap")
         header->heap_addr = HADDR_UNDEF;
     } /* end if */
@@ -622,11 +612,11 @@ H5SM_delete_index(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5SM_delete_index */
+} /* end H5SM__delete_index */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_create_list
+ * Function:    H5SM__create_list
  *
  * Purpose:     Creates a list of SOHM messages.
  *
@@ -641,7 +631,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static haddr_t
-H5SM_create_list(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
+H5SM__create_list(H5F_t *f, H5SM_index_header_t *header)
 {
     H5SM_list_t *list = NULL;   /* List of messages */
     hsize_t x;                  /* Counter variable */
@@ -649,7 +639,7 @@ H5SM_create_list(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
     haddr_t addr = HADDR_UNDEF; /* Address of the list on disk */
     haddr_t ret_value = HADDR_UNDEF;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, HADDR_UNDEF)
+    FUNC_ENTER_STATIC_TAG(H5AC__SOHM_TAG)
 
     HDassert(f);
     HDassert(header);
@@ -670,11 +660,11 @@ H5SM_create_list(H5F_t *f, H5SM_index_header_t *header, hid_t dxpl_id)
     list->header = header;
 
     /* Allocate space for the list on disk */
-    if(HADDR_UNDEF == (addr = H5MF_alloc(f, H5FD_MEM_SOHM_INDEX, dxpl_id, (hsize_t)header->list_size)))
+    if(HADDR_UNDEF == (addr = H5MF_alloc(f, H5FD_MEM_SOHM_INDEX, (hsize_t)header->list_size)))
 	HGOTO_ERROR(H5E_SOHM, H5E_NOSPACE, HADDR_UNDEF, "file allocation failed for SOHM list")
 
     /* Put the list into the cache */
-    if(H5AC_insert_entry(f, dxpl_id, H5AC_SOHM_LIST, addr, list, H5AC__NO_FLAGS_SET) < 0)
+    if(H5AC_insert_entry(f, H5AC_SOHM_LIST, addr, list, H5AC__NO_FLAGS_SET) < 0)
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTINS, HADDR_UNDEF, "can't add SOHM list to cache")
 
     /* Set return value */
@@ -688,15 +678,15 @@ done:
             list = H5FL_FREE(H5SM_list_t, list);
         } /* end if */
         if(addr != HADDR_UNDEF)
-            H5MF_xfree(f, H5FD_MEM_SOHM_INDEX, dxpl_id, addr, (hsize_t)header->list_size);
+            H5MF_xfree(f, H5FD_MEM_SOHM_INDEX, addr, (hsize_t)header->list_size);
     } /* end if */
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, HADDR_UNDEF)
-} /* end H5SM_create_list */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5SM__create_list */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_convert_list_to_btree
+ * Function:    H5SM__convert_list_to_btree
  *
  * Purpose:     Given a list index, turns it into a B-tree index.  This is
  *              done when too many messages are added to the list.
@@ -717,8 +707,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
-    H5SM_list_t **_list, H5HF_t *fheap, H5O_t *open_oh, hid_t dxpl_id)
+H5SM__convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
+    H5SM_list_t **_list, H5HF_t *fheap, H5O_t *open_oh)
 {
     H5SM_list_t *list;                  /* Pointer to the existing message list */
     H5SM_mesg_key_t key;                /* Key for inserting records in v2 B-tree */
@@ -730,7 +720,7 @@ H5SM_convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
     void *      encoding_buf = NULL;
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(_list && *_list);
     HDassert(header);
@@ -744,7 +734,7 @@ H5SM_convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
     bt2_cparam.rrec_size = (uint32_t)H5SM_SOHM_ENTRY_SIZE(f);
     bt2_cparam.split_percent = H5SM_B2_SPLIT_PERCENT;
     bt2_cparam.merge_percent = H5SM_B2_MERGE_PERCENT;
-    if(NULL == (bt2 = H5B2_create(f, dxpl_id, &bt2_cparam, f)))
+    if(NULL == (bt2 = H5B2_create(f, &bt2_cparam, f)))
         HGOTO_ERROR(H5E_SOHM, H5E_CANTCREATE, FAIL, "B-tree creation failed for SOHM index")
 
     /* Retrieve the v2 B-tree's address in the file */
@@ -755,7 +745,6 @@ H5SM_convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
      * are in the heap, they have a heap ID and no encoding or type_id.
      */
     key.file = f;
-    key.dxpl_id = dxpl_id;
     key.fheap = fheap;
     key.encoding_size = 0;
     key.encoding = NULL;
@@ -767,23 +756,23 @@ H5SM_convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
             key.message = list->messages[x];
 
             /* Get the encoded message */
-            if(H5SM_read_mesg(f, &(key.message), fheap, open_oh, dxpl_id, &key.encoding_size, &encoding_buf) < 0)
+            if(H5SM__read_mesg(f, &(key.message), fheap, open_oh, &key.encoding_size, &encoding_buf) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTLOAD, FAIL, "Couldn't read SOHM message in list")
 
             key.encoding = encoding_buf;
 
             /* Insert the message into the B-tree */
-            if(H5B2_insert(bt2, dxpl_id, &key) < 0)
+            if(H5B2_insert(bt2, &key) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTINSERT, FAIL, "couldn't add SOHM to B-tree")
 
-            /* Free buffer from H5SM_read_mesg */
+            /* Free buffer from H5SM__read_mesg */
             if(encoding_buf)
                 encoding_buf = H5MM_xfree(encoding_buf);
         } /* end if */
     } /* end for */
 
     /* Unprotect list in cache and release heap */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+    if(H5AC_unprotect(f, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to release SOHM list")
     *_list = list = NULL;
 
@@ -791,7 +780,7 @@ H5SM_convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
      * still using!)
      */
     num_messages = header->num_messages;        /* preserve this across the index deletion */
-    if(H5SM_delete_index(f, header, dxpl_id, FALSE) < 0)
+    if(H5SM__delete_index(f, header, FALSE) < 0)
         HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "can't free list index")
 
     /* Set/restore header info */
@@ -801,17 +790,17 @@ H5SM_convert_list_to_btree(H5F_t *f, H5SM_index_header_t *header,
 
 done:
     /* Release resources */
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for SOHM index")
     if(encoding_buf)
         encoding_buf = H5MM_xfree(encoding_buf);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* H5SM_convert_list_to_btree() */
+} /* H5SM__convert_list_to_btree() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_convert_btree_to_list
+ * Function:    H5SM__convert_btree_to_list
  *
  * Purpose:     Given a B-tree index, turns it into a list index.  This is
  *              done when too many messages are deleted from the B-tree.
@@ -825,14 +814,14 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_convert_btree_to_list(H5F_t * f, H5SM_index_header_t * header, hid_t dxpl_id)
+H5SM__convert_btree_to_list(H5F_t * f, H5SM_index_header_t * header)
 {
     H5SM_list_t     *list = NULL;
     H5SM_list_cache_ud_t cache_udata;   /* User-data for metadata cache callback */
     haddr_t          btree_addr;
     herr_t           ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__SOHM_TAG)
 
     /* Remember the address of the old B-tree, but change the header over to be
      * a list..
@@ -843,7 +832,7 @@ H5SM_convert_btree_to_list(H5F_t * f, H5SM_index_header_t * header, hid_t dxpl_i
     header->index_type = H5SM_LIST;
 
     /* Create a new list index */
-    if(HADDR_UNDEF == (header->index_addr = H5SM_create_list(f, header, dxpl_id)))
+    if(HADDR_UNDEF == (header->index_addr = H5SM__create_list(f, header)))
         HGOTO_ERROR(H5E_SOHM, H5E_CANTINIT, FAIL, "unable to create shared message list")
 
     /* Set up user data for metadata cache callback */
@@ -851,22 +840,22 @@ H5SM_convert_btree_to_list(H5F_t * f, H5SM_index_header_t * header, hid_t dxpl_i
     cache_udata.header = header;
 
     /* Protect the SOHM list */
-    if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, H5AC_SOHM_LIST, header->index_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
         HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM list index")
 
     /* Delete the B-tree and have messages copy themselves to the
      * list as they're deleted
      */
-    if(H5B2_delete(f, dxpl_id, btree_addr, f, H5SM_bt2_convert_to_list_op, list) < 0)
+    if(H5B2_delete(f, btree_addr, f, H5SM_bt2_convert_to_list_op, list) < 0)
         HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "unable to delete B-tree")
 
 done:
     /* Release the SOHM list from the cache */
-    if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DIRTIED_FLAG) < 0)
+    if(list && H5AC_unprotect(f, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DIRTIED_FLAG) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to unprotect SOHM index")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5SM_convert_btree_to_list() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5SM__convert_btree_to_list() */
 
 
 /*-------------------------------------------------------------------------
@@ -932,7 +921,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5SM_can_share(H5F_t *f, hid_t dxpl_id, H5SM_master_table_t *table,
+H5SM_can_share(H5F_t *f, H5SM_master_table_t *table,
     ssize_t *sohm_index_num, unsigned type_id, const void *mesg)
 {
     size_t              mesg_size;
@@ -941,7 +930,7 @@ H5SM_can_share(H5F_t *f, hid_t dxpl_id, H5SM_master_table_t *table,
     htri_t              tri_ret;
     htri_t              ret_value = TRUE;
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     /* "trivial" sharing checks */
     if((tri_ret = H5SM_can_share_common(f, type_id, mesg)) < 0)
@@ -959,7 +948,7 @@ H5SM_can_share(H5F_t *f, hid_t dxpl_id, H5SM_master_table_t *table,
         /* Set up user data for callback */
         cache_udata.f = f;
 
-        if(NULL == (my_table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (my_table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
     } /* end if */
 
@@ -983,10 +972,10 @@ H5SM_can_share(H5F_t *f, hid_t dxpl_id, H5SM_master_table_t *table,
 
 done:
     /* Release the master SOHM table, if we protected it */
-    if(my_table && my_table != table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), my_table, H5AC__NO_FLAGS_SET) < 0)
+    if(my_table && my_table != table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), my_table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_can_share() */
 
 
@@ -1051,7 +1040,7 @@ done:
  *-------------------------------------------------------------------------
  */
 htri_t
-H5SM_try_share(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned defer_flags,
+H5SM_try_share(H5F_t *f, H5O_t *open_oh, unsigned defer_flags,
     unsigned type_id, void *mesg, unsigned *mesg_flags)
 {
     H5SM_master_table_t *table = NULL;
@@ -1064,7 +1053,7 @@ H5SM_try_share(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned defer_flags,
 #endif
     htri_t              ret_value = TRUE;
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     /* If we previously deferred this operation, the saved message type should
      * be the same as the one we get here.  In debug mode, we make sure this
@@ -1091,11 +1080,11 @@ H5SM_try_share(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned defer_flags,
     cache_udata.f = f;
 
     /* Look up the master SOHM table */
-    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__NO_FLAGS_SET)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
     /* "complex" sharing checks */
-    if((tri_ret = H5SM_can_share(f, dxpl_id, table, &index_num, type_id, mesg)) < 0)
+    if((tri_ret = H5SM_can_share(f, table, &index_num, type_id, mesg)) < 0)
         HGOTO_ERROR(H5E_SOHM, H5E_BADTYPE, FAIL, "'complex' sharing checks returned error")
     if(tri_ret == FALSE)
         HGOTO_DONE(FALSE)
@@ -1104,7 +1093,7 @@ H5SM_try_share(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned defer_flags,
 
     /* If the index hasn't been allocated yet, create it */
     if(table->indexes[index_num].index_addr == HADDR_UNDEF) {
-        if(H5SM_create_index(f, &(table->indexes[index_num]), dxpl_id) < 0)
+        if(H5SM__create_index(f, &(table->indexes[index_num])) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_CANTINIT, FAIL, "unable to create SOHM index")
         cache_flags |= H5AC__DIRTIED_FLAG;
     } /* end if */
@@ -1112,7 +1101,7 @@ H5SM_try_share(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, unsigned defer_flags,
     /* Write the message as a shared message.  This may or may not cause the
      * message to become shared (if it is unique, it will not be shared).
      */
-    if(H5SM_write_mesg(f, dxpl_id, open_oh, &(table->indexes[index_num]),
+    if(H5SM__write_mesg(f, open_oh, &(table->indexes[index_num]),
             (defer_flags & H5SM_DEFER) != 0, type_id, mesg, &cache_flags) < 0)
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTINSERT, FAIL, "can't write shared message")
 
@@ -1140,15 +1129,15 @@ done:
 #endif /* NDEBUG */
 
     /* Release the master SOHM table */
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, cache_flags) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, cache_flags) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_try_share() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5SM_incr_ref
+ * Function:	H5SM__incr_ref
  *
  * Purpose:	Increment the reference count for a SOHM message and return
  *              the message's heap ID.
@@ -1165,13 +1154,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_incr_ref(void *record, void *_op_data, hbool_t *changed)
+H5SM__incr_ref(void *record, void *_op_data, hbool_t *changed)
 {
     H5SM_sohm_t *message = (H5SM_sohm_t *) record;
     H5SM_incr_ref_opdata *op_data = (H5SM_incr_ref_opdata *) _op_data;
     herr_t ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(record);
     HDassert(op_data);
@@ -1184,7 +1173,7 @@ H5SM_incr_ref(void *record, void *_op_data, hbool_t *changed)
         HDassert(op_data->key && op_data->key->fheap);
 
         /* Put the message in the heap and record its new heap ID */
-        if(H5HF_insert(op_data->key->fheap, op_data->dxpl_id, op_data->key->encoding_size, op_data->key->encoding, &message->u.heap_loc.fheap_id) < 0)
+        if(H5HF_insert(op_data->key->fheap, op_data->key->encoding_size, op_data->key->encoding, &message->u.heap_loc.fheap_id) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_CANTINSERT, FAIL, "unable to insert message into fractal heap")
 
         message->location = H5SM_IN_HEAP;
@@ -1205,11 +1194,11 @@ H5SM_incr_ref(void *record, void *_op_data, hbool_t *changed)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5SM_incr_ref() */
+} /* end H5SM__incr_ref() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_write_mesg
+ * Function:    H5SM__write_mesg
  *
  * Purpose:     This routine adds a shareable message to an index.
  *              The behavior is controlled by the DEFER parameter:
@@ -1219,7 +1208,7 @@ done:
  *              be with DEFER set the FALSE and updates the shared message
  *              info, but does not actually add the message to a heap, list,
  *              or b-tree.  Assumes that an open object header will be
- *              available when H5SM_write_mesg is called with DEFER set to
+ *              available when H5SM__write_mesg is called with DEFER set to
  *              FALSE.
  *
  *              If DEFER is FALSE, this routine adds a shareable message to
@@ -1241,9 +1230,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    H5SM_index_header_t *header, hbool_t defer, unsigned type_id, void *mesg,
-    unsigned *cache_flags_ptr)
+H5SM__write_mesg(H5F_t *f, H5O_t *open_oh, H5SM_index_header_t *header,
+    hbool_t defer, unsigned type_id, void *mesg, unsigned *cache_flags_ptr)
 {
     H5SM_list_t           *list = NULL;     /* List index */
     H5SM_mesg_key_t       key;              /* Key used to search the index */
@@ -1257,7 +1245,7 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
     size_t                empty_pos = UFAIL; /* Empty entry in list */
     herr_t                ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__SOHM_TAG)
 
     /* Sanity check */
     HDassert(header);
@@ -1273,11 +1261,10 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTENCODE, FAIL, "can't encode message to be shared")
 
     /* Open the fractal heap for this index */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, header->heap_addr)))
+    if(NULL == (fheap = H5HF_open(f, header->heap_addr)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Set up a key for the message to be written */
-    key.dxpl_id = dxpl_id;
     key.file = f;
     key.fheap = fheap;
     key.encoding = encoding_buf;
@@ -1297,7 +1284,7 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
         cache_udata.header = header;
 
         /* The index is a list; get it from the cache */
-        if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, &cache_udata, defer ? H5AC__READ_ONLY_FLAG : H5AC__NO_FLAGS_SET)))
+        if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, H5AC_SOHM_LIST, header->index_addr, &cache_udata, defer ? H5AC__READ_ONLY_FLAG : H5AC__NO_FLAGS_SET)))
 	    HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM index")
 
         /* See if the message is already in the index and get its location.
@@ -1318,7 +1305,7 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
                  */
                 if(list->messages[list_pos].location == H5SM_IN_OH) {
                     /* Put the message in the heap and record its new heap ID */
-                    if(H5HF_insert(fheap, dxpl_id, key.encoding_size, key.encoding, &shared.u.heap_id) < 0)
+                    if(H5HF_insert(fheap, key.encoding_size, key.encoding, &shared.u.heap_id) < 0)
                         HGOTO_ERROR(H5E_SOHM, H5E_CANTINSERT, FAIL, "unable to insert message into fractal heap")
 
                     list->messages[list_pos].location = H5SM_IN_HEAP;
@@ -1342,7 +1329,7 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
         HDassert(header->index_type == H5SM_BTREE);
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, header->index_addr, f)))
+        if(NULL == (bt2 = H5B2_open(f, header->index_addr, f)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for SOHM index")
 
         if(defer) {
@@ -1353,7 +1340,7 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
              * return a heap ID, since a message with a reference count greater
              * than 1 is always shared in the heap.
              */
-            if((bt2_find = H5B2_find(bt2, dxpl_id, &key, NULL, NULL)) < 0)
+            if((bt2_find = H5B2_find(bt2, &key, NULL, NULL)) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_NOTFOUND, FAIL, "can't search for message in index")
             found = (hbool_t)bt2_find;
         } /* end if */
@@ -1362,14 +1349,13 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 
             /* Set up callback info */
             op_data.key = &key;
-            op_data.dxpl_id = dxpl_id;
 
             /* If this returns failure, it means that the message wasn't found. */
             /* If it succeeds, set the heap_id in the shared struct.  It will
              * return a heap ID, since a message with a reference count greater
              * than 1 is always shared in the heap.
              */
-            if(H5B2_modify(bt2, dxpl_id, &key, H5SM_incr_ref, &op_data) >= 0) {
+            if(H5B2_modify(bt2, &key, H5SM__incr_ref, &op_data) >= 0) {
                 shared.u.heap_id = op_data.fheap_id;
                 found = TRUE;
             } /* end if */
@@ -1446,7 +1432,7 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 
             if(!defer) {
                 /* Put the message in the heap and record its new heap ID */
-                if(H5HF_insert(fheap, dxpl_id, key.encoding_size, key.encoding, &shared.u.heap_id) < 0)
+                if(H5HF_insert(fheap, key.encoding_size, key.encoding, &shared.u.heap_id) < 0)
                     HGOTO_ERROR(H5E_SOHM, H5E_CANTINSERT, FAIL, "unable to insert message into fractal heap")
 
                 key.message.location = H5SM_IN_HEAP;
@@ -1461,7 +1447,7 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 
             /* Check whether the list has grown enough that it needs to become a B-tree */
             if(header->index_type == H5SM_LIST && header->num_messages >= header->list_max)
-                if(H5SM_convert_list_to_btree(f, header, &list, fheap, open_oh, dxpl_id) < 0)
+                if(H5SM__convert_list_to_btree(f, header, &list, fheap, open_oh) < 0)
                     HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "unable to convert list to B-tree")
 
             /* Insert the new message into the SOHM index */
@@ -1487,11 +1473,11 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 
                 /* Open the index v2 B-tree, if it isn't already */
                 if(NULL == bt2) {
-                    if(NULL == (bt2 = H5B2_open(f, dxpl_id, header->index_addr, f)))
+                    if(NULL == (bt2 = H5B2_open(f, header->index_addr, f)))
                         HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for SOHM index")
                 } /* end if */
 
-                if(H5B2_insert(bt2, dxpl_id, &key) < 0)
+                if(H5B2_insert(bt2, &key) < 0)
                     HGOTO_ERROR(H5E_SOHM, H5E_CANTINSERT, FAIL, "couldn't add SOHM to B-tree")
             } /* end else */
 
@@ -1510,20 +1496,20 @@ H5SM_write_mesg(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
 
 done:
     /* Release the fractal heap & v2 B-tree if we opened them */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for SOHM index")
 
     /* If we got a list out of the cache, release it (it is always dirty after writing a message) */
-    if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, list, defer ? H5AC__NO_FLAGS_SET : H5AC__DIRTIED_FLAG) < 0)
+    if(list && H5AC_unprotect(f, H5AC_SOHM_LIST, header->index_addr, list, defer ? H5AC__NO_FLAGS_SET : H5AC__DIRTIED_FLAG) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM index")
 
     if(encoding_buf)
         encoding_buf = H5MM_xfree(encoding_buf);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5SM_write_mesg() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5SM__write_mesg() */
 
 
 /*-------------------------------------------------------------------------
@@ -1545,18 +1531,19 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, H5O_shared_t *sh_mesg)
+H5SM_delete(H5F_t *f, H5O_t *open_oh, H5O_shared_t *sh_mesg)
 {
     H5SM_master_table_t  *table = NULL;
     unsigned              cache_flags = H5AC__NO_FLAGS_SET;
     H5SM_table_cache_ud_t cache_udata;      /* User-data for callback */
     ssize_t               index_num;
+    size_t                mesg_size = 0;
     void                 *mesg_buf = NULL;
     void                 *native_mesg = NULL;
     unsigned              type_id;              /* Message type ID to operate on */
     herr_t                ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     HDassert(f);
     HDassert(H5F_addr_defined(H5F_SOHM_ADDR(f)));
@@ -1569,7 +1556,7 @@ H5SM_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, H5O_shared_t *sh_mesg)
     cache_udata.f = f;
 
     /* Look up the master SOHM table */
-    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__NO_FLAGS_SET)))
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__NO_FLAGS_SET)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
     /* Find the correct index and try to delete from it */
@@ -1580,11 +1567,11 @@ H5SM_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, H5O_shared_t *sh_mesg)
      * zero and any file space it uses needs to be freed.  mesg_buf holds the
      * serialized form of the message.
      */
-    if(H5SM_delete_from_index(f, dxpl_id, open_oh, &(table->indexes[index_num]), sh_mesg, &cache_flags, &mesg_buf) < 0)
-	HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "unable to delete mesage from SOHM index")
+    if(H5SM__delete_from_index(f, open_oh, &(table->indexes[index_num]), sh_mesg, &cache_flags, &mesg_size, &mesg_buf) < 0)
+        HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "unable to delete mesage from SOHM index")
 
     /* Release the master SOHM table */
-    if(H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, cache_flags) < 0)
+    if(H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, cache_flags) < 0)
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
     table = NULL;
 
@@ -1593,16 +1580,16 @@ H5SM_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh, H5O_shared_t *sh_mesg)
      * master table needs to be unprotected when we do this.
      */
     if(mesg_buf) {
-        if(NULL == (native_mesg = H5O_msg_decode(f, dxpl_id, open_oh, type_id, (const unsigned char *)mesg_buf)))
+        if(NULL == (native_mesg = H5O_msg_decode(f, open_oh, type_id, mesg_size, (const unsigned char *)mesg_buf)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTDECODE, FAIL, "can't decode shared message.")
 
-        if(H5O_msg_delete(f, dxpl_id, open_oh, type_id, native_mesg) < 0)
+        if(H5O_msg_delete(f, open_oh, type_id, native_mesg) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_CANTFREE, FAIL, "can't delete shared message.")
     } /* end if */
 
 done:
     /* Release the master SOHM table (should only happen on error) */
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, cache_flags) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, cache_flags) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
     /* Release any native message we decoded */
@@ -1613,7 +1600,7 @@ done:
     if(mesg_buf)
         mesg_buf = H5MM_xfree(mesg_buf);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_delete() */
 
 
@@ -1715,7 +1702,7 @@ H5SM_get_hash_fh_cb(const void *obj, size_t obj_len, void *_udata)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5SM_decr_ref
+ * Function:	H5SM__decr_ref
  *
  * Purpose:	Decrement the reference count for a SOHM message.  Doesn't
  *              remove the record from the B-tree even if the refcount
@@ -1734,11 +1721,11 @@ H5SM_get_hash_fh_cb(const void *obj, size_t obj_len, void *_udata)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_decr_ref(void *record, void *op_data, hbool_t *changed)
+H5SM__decr_ref(void *record, void *op_data, hbool_t *changed)
 {
     H5SM_sohm_t *message = (H5SM_sohm_t *) record;
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     HDassert(record);
     HDassert(op_data);
@@ -1757,11 +1744,11 @@ H5SM_decr_ref(void *record, void *op_data, hbool_t *changed)
        *(H5SM_sohm_t *)op_data = *message;
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5SM_decr_ref() */
+} /* end H5SM__decr_ref() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_delete_from_index
+ * Function:    H5SM__delete_from_index
  *
  * Purpose:     Decrement the reference count for a particular message in this
  *              index.  If the reference count reaches zero, allocate a buffer
@@ -1778,9 +1765,9 @@ H5SM_decr_ref(void *record, void *op_data, hbool_t *changed)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    H5SM_index_header_t *header, const H5O_shared_t *mesg,
-    unsigned *cache_flags, void ** /*out*/ encoded_mesg)
+H5SM__delete_from_index(H5F_t *f, H5O_t *open_oh, H5SM_index_header_t *header,
+    const H5O_shared_t *mesg, unsigned *cache_flags, size_t * /*out*/ mesg_size,
+    void ** /*out*/ encoded_mesg)
 {
     H5SM_list_t     *list = NULL;
     H5SM_mesg_key_t key;
@@ -1793,7 +1780,7 @@ H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
     unsigned        type_id;            /* Message type to operate on */
     herr_t          ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__SOHM_TAG)
 
     /* Sanity check */
     HDassert(f);
@@ -1806,7 +1793,7 @@ H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
     type_id = mesg->msg_type_id;
 
     /* Open the heap for this type of message. */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, header->heap_addr)))
+    if(NULL == (fheap = H5HF_open(f, header->heap_addr)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Get the message size and encoded message for the message to be deleted,
@@ -1825,12 +1812,11 @@ H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
     } /* end else */
 
     /* Get the encoded message */
-    if(H5SM_read_mesg(f, &key.message, fheap, open_oh, dxpl_id, &buf_size, &encoding_buf) < 0)
+    if(H5SM__read_mesg(f, &key.message, fheap, open_oh, &buf_size, &encoding_buf) < 0)
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Set up key for message to be deleted. */
     key.file = f;
-    key.dxpl_id = dxpl_id;
     key.fheap = fheap;
     key.encoding = encoding_buf;
     key.encoding_size = buf_size;
@@ -1846,7 +1832,7 @@ H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
         cache_udata.header = header;
 
         /* If the index is stored as a list, get it from the cache */
-        if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
+        if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, H5AC_SOHM_LIST, header->index_addr, &cache_udata, H5AC__NO_FLAGS_SET)))
 	    HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM index")
 
         /* Find the message in the list */
@@ -1866,13 +1852,13 @@ H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
         HDassert(header->index_type == H5SM_BTREE);
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, header->index_addr, f)))
+        if(NULL == (bt2 = H5B2_open(f, header->index_addr, f)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for SOHM index")
 
         /* If this returns failure, it means that the message wasn't found.
          * If it succeeds, a copy of the modified message will be returned.
          */
-        if(H5B2_modify(bt2, dxpl_id, &key, H5SM_decr_ref, &message) < 0)
+        if(H5B2_modify(bt2, &key, H5SM__decr_ref, &message) < 0)
 	    HGOTO_ERROR(H5E_SOHM, H5E_NOTFOUND, FAIL, "message not in index")
 
         /* Point to the message */
@@ -1896,68 +1882,71 @@ H5SM_delete_from_index(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
         else {
             /* Open the index v2 B-tree, if it isn't already */
             if(NULL == bt2) {
-                if(NULL == (bt2 = H5B2_open(f, dxpl_id, header->index_addr, f)))
+                if(NULL == (bt2 = H5B2_open(f, header->index_addr, f)))
                     HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for SOHM index")
             } /* end if */
 
-            if(H5B2_remove(bt2, dxpl_id, &key, NULL, NULL) < 0)
+            if(H5B2_remove(bt2, &key, NULL, NULL) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTREMOVE, FAIL, "unable to delete message from index")
         } /* end else */
 
         /* Remove the message from the heap if it was stored in the heap*/
         if(old_loc == H5SM_IN_HEAP)
-            if(H5HF_remove(fheap, dxpl_id, &(message_ptr->u.heap_loc.fheap_id)) < 0)
+            if(H5HF_remove(fheap, &(message_ptr->u.heap_loc.fheap_id)) < 0)
 	        HGOTO_ERROR(H5E_SOHM, H5E_CANTREMOVE, FAIL, "unable to remove message from heap")
 
 
         /* Return the message's encoding so anything it references can be freed */
         *encoded_mesg = encoding_buf;
+        *mesg_size = buf_size;
 
         /* If there are no messages left in the index, delete it */
         if(header->num_messages == 0) {
 
             /* Unprotect cache and release heap */
-            if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
+            if(list && H5AC_unprotect(f, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DELETED_FLAG | H5AC__FREE_FILE_SPACE_FLAG) < 0)
 	        HGOTO_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to release SOHM list")
             list = NULL;
 
             HDassert(fheap);
-            if(H5HF_close(fheap, dxpl_id) < 0)
+            if(H5HF_close(fheap) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
             fheap = NULL;
 
             /* Delete the index and its heap */
-            if(H5SM_delete_index(f, header, dxpl_id, TRUE) < 0)
+            if(H5SM__delete_index(f, header, TRUE) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTDELETE, FAIL, "can't delete empty index")
         }  /* end if */
         else if(header->index_type == H5SM_BTREE && header->num_messages < header->btree_min) {
             /* Otherwise, if we've just passed the btree-to-list cutoff, convert
              * this B-tree into a list
              */
-           if(H5SM_convert_btree_to_list(f, header, dxpl_id) < 0)
+           if(H5SM__convert_btree_to_list(f, header) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTINIT, FAIL, "unable to convert btree to list")
         } /* end if */
     } /* end if */
 
 done:
     /* Release the SOHM list */
-    if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DIRTIED_FLAG) < 0)
+    if(list && H5AC_unprotect(f, H5AC_SOHM_LIST, header->index_addr, list, H5AC__DIRTIED_FLAG) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM index")
 
     /* Release the fractal heap & v2 B-tree if we opened them */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for SOHM index")
 
     /* Free the message encoding, if we're not returning it in encoded_mesg
      * or if there's been an error.
      */
-    if(encoding_buf && (NULL == *encoded_mesg || ret_value < 0))
+    if(encoding_buf && (NULL == *encoded_mesg || ret_value < 0)) {
         encoding_buf = H5MM_xfree(encoding_buf);
+        *mesg_size = 0;
+    }
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5SM_delete_from_index() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5SM__delete_from_index() */
 
 
 /*-------------------------------------------------------------------------
@@ -1973,18 +1962,17 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist, hid_t dxpl_id)
+H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist)
 {
     H5F_t *f = ext_loc->file;           /* File pointer (convenience variable) */
     H5O_shmesg_table_t sohm_table;      /* SOHM message from superblock extension */
     H5SM_master_table_t *table = NULL;  /* SOHM master table */
-    H5P_genplist_t *dxpl = NULL;        /* DXPL for setting ring */
     H5AC_ring_t orig_ring = H5AC_RING_INV;      /* Original ring value */
     unsigned tmp_sohm_nindexes;		/* Number of shared messages indexes in the table */
     htri_t status;                      /* Status for message existing */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     /* Sanity check */
     HDassert(ext_loc);
@@ -1992,7 +1980,7 @@ H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist, hid_t dxpl_id)
     HDassert(fc_plist);
 
     /* Check for the extension having a 'shared message info' message */
-    if((status = H5O_msg_exists(ext_loc, H5O_SHMESG_ID, dxpl_id)) < 0)
+    if((status = H5O_msg_exists(ext_loc, H5O_SHMESG_ID)) < 0)
         HGOTO_ERROR(H5E_SOHM, H5E_CANTGET, FAIL, "unable to read object header")
     if(status) {
         H5SM_table_cache_ud_t cache_udata;      /* User-data for callback */
@@ -2003,7 +1991,7 @@ H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist, hid_t dxpl_id)
         unsigned u;                  /* Local index variable */
 
         /* Retrieve the 'shared message info' structure */
-        if(NULL == H5O_msg_read(ext_loc, H5O_SHMESG_ID, &sohm_table, dxpl_id))
+        if(NULL == H5O_msg_read(ext_loc, H5O_SHMESG_ID, &sohm_table))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTGET, FAIL, "shared message info message not present")
 
         /* Portably initialize the arrays */
@@ -2021,11 +2009,10 @@ H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist, hid_t dxpl_id)
         cache_udata.f = f;
 
         /* Set the ring type in the DXPL */
-        if(H5AC_set_ring(dxpl_id, H5AC_RING_USER, &dxpl, &orig_ring) < 0)
-            HGOTO_ERROR(H5E_SOHM, H5E_CANTSET, FAIL, "unable to set ring value")
+        H5AC_set_ring(H5AC_RING_USER, &orig_ring);
 
         /* Read the rest of the SOHM table information from the cache */
-        if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
         /* Get index conversion limits */
@@ -2075,15 +2062,15 @@ H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist, hid_t dxpl_id)
     } /* end else */
 
 done:
-    /* Reset the ring in the DXPL */
-    if(H5AC_reset_ring(dxpl, orig_ring) < 0)
-        HDONE_ERROR(H5E_SOHM, H5E_CANTSET, FAIL, "unable to set property value")
+    /* Reset the ring in the API context */
+    if(orig_ring != H5AC_RING_INV)
+        H5AC_set_ring(orig_ring, NULL);
 
     /* Release the master SOHM table if we took it out of the cache */
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_get_info() */
 
 
@@ -2165,8 +2152,8 @@ H5SM_get_refcount_bt2_cb(const void *_record, void *_op_data)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
-    const H5O_shared_t *sh_mesg, hsize_t *ref_count)
+H5SM_get_refcount(H5F_t *f, unsigned type_id, const H5O_shared_t *sh_mesg,
+    hsize_t *ref_count)
 {
     H5HF_t *fheap = NULL;               /* Fractal heap that contains shared messages */
     H5B2_t *bt2 = NULL;                 /* v2 B-tree handle for index */
@@ -2181,7 +2168,7 @@ H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
     void * encoding_buf = NULL;         /* Buffer for encoded message */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_NOINIT_TAG(H5AC__SOHM_TAG)
 
     /* Sanity check */
     HDassert(f);
@@ -2192,7 +2179,7 @@ H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
     tbl_cache_udata.f = f;
 
     /* Look up the master SOHM table */
-    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &tbl_cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &tbl_cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
     /* Find the correct index and find the message in it */
@@ -2201,7 +2188,7 @@ H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
     header = &(table->indexes[index_num]);
 
     /* Open the heap for this message type */
-    if(NULL == (fheap = H5HF_open(f, dxpl_id, header->heap_addr)))
+    if(NULL == (fheap = H5HF_open(f, header->heap_addr)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Set up a SOHM message to correspond to the shared message passed in */
@@ -2210,12 +2197,11 @@ H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
     key.message.u.heap_loc.ref_count = 0; /* Ref count isn't needed to find message */
 
     /* Get the encoded message */
-    if(H5SM_read_mesg(f, &key.message, fheap, NULL, dxpl_id, &buf_size, &encoding_buf) < 0)
+    if(H5SM__read_mesg(f, &key.message, fheap, NULL, &buf_size, &encoding_buf) < 0)
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
     /* Set up key for message to locate */
     key.file = f;
-    key.dxpl_id = dxpl_id;
     key.fheap = fheap;
     key.encoding = encoding_buf;
     key.encoding_size = buf_size;
@@ -2231,7 +2217,7 @@ H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
         lst_cache_udata.header = header;
 
         /* If the index is stored as a list, get it from the cache */
-        if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, &lst_cache_udata, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, H5AC_SOHM_LIST, header->index_addr, &lst_cache_udata, H5AC__READ_ONLY_FLAG)))
 	    HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM index")
 
         /* Find the message in the list */
@@ -2250,11 +2236,11 @@ H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
         HDassert(header->index_type == H5SM_BTREE);
 
         /* Open the index v2 B-tree */
-        if(NULL == (bt2 = H5B2_open(f, dxpl_id, header->index_addr, f)))
+        if(NULL == (bt2 = H5B2_open(f, header->index_addr, f)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for SOHM index")
 
         /* Look up the message in the v2 B-tree */
-        if((msg_exists = H5B2_find(bt2, dxpl_id, &key, H5SM_get_refcount_bt2_cb, &message)) < 0)
+        if((msg_exists = H5B2_find(bt2, &key, H5SM_get_refcount_bt2_cb, &message)) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_CANTGET, FAIL, "error finding message in index")
         if(!msg_exists)
 	    HGOTO_ERROR(H5E_SOHM, H5E_NOTFOUND, FAIL, "message not in index")
@@ -2266,23 +2252,23 @@ H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
 
 done:
     /* Release resources */
-    if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, header->index_addr, list, H5AC__NO_FLAGS_SET) < 0)
+    if(list && H5AC_unprotect(f, H5AC_SOHM_LIST, header->index_addr, list, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM index")
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for SOHM index")
     if(encoding_buf)
         encoding_buf = H5MM_xfree(encoding_buf);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_get_refcount() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5SM_read_iter_op
+ * Function:	H5SM__read_iter_op
  *
  * Purpose:	OH iteration callback to get the encoded version of a message
  *              by index.
@@ -2300,13 +2286,13 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_read_iter_op(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned sequence,
+H5SM__read_iter_op(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned sequence,
     unsigned H5_ATTR_UNUSED *oh_modified, void *_udata/*in,out*/)
 {
     H5SM_read_udata_t *udata = (H5SM_read_udata_t *) _udata;
     herr_t ret_value = H5_ITER_CONT;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /*
      * Check arguments.
@@ -2340,13 +2326,13 @@ H5SM_read_iter_op(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned sequence,
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5SM_read_iter_op() */
+} /* end H5SM__read_iter_op() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5SM_read_mesg_fh_cb
+ * Function:	H5SM__read_mesg_fh_cb
  *
- * Purpose:	Callback for H5HF_op, used in H5SM_read_mesg below.
+ * Purpose:	Callback for H5HF_op, used in H5SM__read_mesg below.
  *              Makes a copy of the message in the heap data, returned in the
  *              UDATA struct.
  *
@@ -2358,12 +2344,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_read_mesg_fh_cb(const void *obj, size_t obj_len, void *_udata)
+H5SM__read_mesg_fh_cb(const void *obj, size_t obj_len, void *_udata)
 {
     H5SM_read_udata_t *udata = (H5SM_read_udata_t *)_udata;
     herr_t ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Allocate a buffer to hold the message */
     if(NULL == (udata->encoding_buf = H5MM_malloc(obj_len)))
@@ -2375,11 +2361,11 @@ H5SM_read_mesg_fh_cb(const void *obj, size_t obj_len, void *_udata)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5SM_read_mesg_fh_cb() */
+} /* end H5SM__read_mesg_fh_cb() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5SM_read_mesg
+ * Function:	H5SM__read_mesg
  *
  * Purpose:	Given an H5SM_sohm_t sohm, encodes the message into a buffer.
  *              This buffer should then be freed.
@@ -2392,16 +2378,15 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_read_mesg(H5F_t *f, const H5SM_sohm_t *mesg, H5HF_t *fheap,
-    H5O_t *open_oh, hid_t dxpl_id, size_t *encoding_size /*out*/,
-    void ** encoded_mesg /*out*/)
+H5SM__read_mesg(H5F_t *f, const H5SM_sohm_t *mesg, H5HF_t *fheap,
+    H5O_t *open_oh, size_t *encoding_size /*out*/, void ** encoded_mesg /*out*/)
 {
     H5SM_read_udata_t udata;    /* User data for callbacks */
     H5O_loc_t oloc;             /* Object location for message in object header */
     H5O_t *oh = NULL;           /* Object header for message in object header */
     herr_t ret_value = SUCCEED;
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_STATIC_TAG(H5AC__SOHM_TAG)
 
     HDassert(f);
     HDassert(mesg);
@@ -2436,7 +2421,7 @@ H5SM_read_mesg(H5F_t *f, const H5SM_sohm_t *mesg, H5HF_t *fheap,
 	        HGOTO_ERROR(H5E_SOHM, H5E_CANTLOAD, FAIL, "unable to open object header")
 
             /* Load the object header from the cache */
-            if(NULL == (oh = H5O_protect(&oloc, dxpl_id, H5AC__READ_ONLY_FLAG, FALSE)))
+            if(NULL == (oh = H5O_protect(&oloc, H5AC__READ_ONLY_FLAG, FALSE)))
 	        HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load object header")
         } /* end if */
         else
@@ -2444,15 +2429,15 @@ H5SM_read_mesg(H5F_t *f, const H5SM_sohm_t *mesg, H5HF_t *fheap,
 
         /* Use the "real" iterate routine so it doesn't try to protect the OH */
         op.op_type = H5O_MESG_OP_LIB;
-        op.u.lib_op = H5SM_read_iter_op;
-        if((ret_value = H5O_msg_iterate_real(f, oh, type, &op, &udata, dxpl_id)) < 0)
+        op.u.lib_op = H5SM__read_iter_op;
+        if((ret_value = H5O__msg_iterate_real(f, oh, type, &op, &udata)) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_BADITER, FAIL, "unable to iterate over object header messages")
     } /* end if */
     else {
         HDassert(mesg->location == H5SM_IN_HEAP);
 
         /* Copy the message from the heap */
-        if(H5HF_op(fheap, dxpl_id, &(mesg->u.heap_loc.fheap_id), H5SM_read_mesg_fh_cb, &udata) < 0)
+        if(H5HF_op(fheap, &(mesg->u.heap_loc.fheap_id), H5SM__read_mesg_fh_cb, &udata) < 0)
             HGOTO_ERROR(H5E_SOHM, H5E_CANTLOAD, FAIL, "can't read message from fractal heap.")
     } /* end else */
     HDassert(udata.encoding_buf);
@@ -2465,7 +2450,7 @@ H5SM_read_mesg(H5F_t *f, const H5SM_sohm_t *mesg, H5HF_t *fheap,
 done:
     /* Close the object header if we opened one and had an error */
     if(oh && oh != open_oh) {
-        if(oh && H5O_unprotect(&oloc, dxpl_id, oh, H5AC__NO_FLAGS_SET) < 0)
+        if(oh && H5O_unprotect(&oloc, oh, H5AC__NO_FLAGS_SET) < 0)
             HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to release object header")
         if(H5O_close(&oloc, NULL) < 0)
             HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "unable to close object header")
@@ -2475,8 +2460,8 @@ done:
     if(ret_value < 0 && udata.encoding_buf)
         udata.encoding_buf = H5MM_xfree(udata.encoding_buf);
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5SM_read_mesg */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5SM__read_mesg */
 
 
 /*-------------------------------------------------------------------------
@@ -2552,16 +2537,15 @@ H5SM_list_free(H5SM_list_t *list)
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_table_debug(H5F_t *f, hid_t dxpl_id, haddr_t table_addr,
-                         FILE *stream, int indent, int fwidth,
-                         unsigned table_vers, unsigned num_indexes)
+H5SM_table_debug(H5F_t *f, haddr_t table_addr, FILE *stream, int indent,
+    int fwidth, unsigned table_vers, unsigned num_indexes)
 {
     H5SM_master_table_t *table = NULL;  /* SOHM master table */
     H5SM_table_cache_ud_t cache_udata;  /* User-data for callback */
     unsigned x;                         /* Counter variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     HDassert(f);
     HDassert(table_addr != HADDR_UNDEF);
@@ -2591,7 +2575,7 @@ H5SM_table_debug(H5F_t *f, hid_t dxpl_id, haddr_t table_addr,
     cache_udata.f = f;
 
     /* Look up the master SOHM table */
-    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, table_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, table_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
     HDfprintf(stream, "%*sShared Message Master Table...\n", indent, "");
@@ -2619,10 +2603,10 @@ H5SM_table_debug(H5F_t *f, hid_t dxpl_id, haddr_t table_addr,
     } /* end for */
 
 done:
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, table_addr, table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, table_addr, table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_table_debug() */
 
 
@@ -2641,8 +2625,8 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr, FILE *stream,
-    int indent, int fwidth, haddr_t table_addr)
+H5SM_list_debug(H5F_t *f, haddr_t list_addr, FILE *stream, int indent,
+    int fwidth, haddr_t table_addr)
 {
     H5SM_master_table_t *table = NULL;  /* SOHM master table */
     H5SM_list_t *list = NULL;           /* SOHM index list for message type (if in list form) */
@@ -2653,7 +2637,7 @@ H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr, FILE *stream,
     unsigned x;                         /* Counter variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     HDassert(f);
     HDassert(list_addr != HADDR_UNDEF);
@@ -2665,7 +2649,7 @@ H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr, FILE *stream,
     tbl_cache_udata.f = f;
 
     /* Look up the master SOHM table */
-    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, table_addr, &tbl_cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, table_addr, &tbl_cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
     /* Determine which index the list is part of */
@@ -2684,12 +2668,12 @@ H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr, FILE *stream,
     lst_cache_udata.header = &(table->indexes[index_num]);
 
     /* Get the list from the cache */
-    if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, list_addr, &lst_cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, H5AC_SOHM_LIST, list_addr, &lst_cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM index")
 
     /* Open the heap, if one exists */
     if(H5F_addr_defined(table->indexes[index_num].heap_addr))
-        if(NULL == (fh = H5HF_open(f, dxpl_id, table->indexes[index_num].heap_addr)))
+        if(NULL == (fh = H5HF_open(f, table->indexes[index_num].heap_addr)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open SOHM heap")
 
     HDfprintf(stream, "%*sShared Message List Index...\n", indent, "");
@@ -2723,14 +2707,14 @@ H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr, FILE *stream,
     } /* end for */
 
 done:
-    if(fh && H5HF_close(fh, dxpl_id) < 0)
+    if(fh && H5HF_close(fh) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "unable to close SOHM heap")
-    if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, list_addr, list, H5AC__NO_FLAGS_SET) < 0)
+    if(list && H5AC_unprotect(f, H5AC_SOHM_LIST, list_addr, list, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM index")
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, table_addr, table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, table_addr, table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_list_debug() */
 
 
@@ -2751,7 +2735,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_ih_size(H5F_t *f, hid_t dxpl_id, hsize_t *hdr_size, H5_ih_info_t *ih_info)
+H5SM_ih_size(H5F_t *f, hsize_t *hdr_size, H5_ih_info_t *ih_info)
 {
     H5SM_master_table_t *table = NULL;          /* SOHM master table */
     H5SM_table_cache_ud_t cache_udata;          /* User-data for callback */
@@ -2760,7 +2744,7 @@ H5SM_ih_size(H5F_t *f, hid_t dxpl_id, hsize_t *hdr_size, H5_ih_info_t *ih_info)
     unsigned             u;                     /* Local index variable */
     herr_t               ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_NOAPI_TAG(H5AC__SOHM_TAG, FAIL)
 
     /* Sanity check */
     HDassert(f);
@@ -2772,7 +2756,7 @@ H5SM_ih_size(H5F_t *f, hid_t dxpl_id, hsize_t *hdr_size, H5_ih_info_t *ih_info)
     cache_udata.f = f;
 
     /* Look up the master SOHM table */
-    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
     /* Get SOHM header size */
@@ -2784,14 +2768,14 @@ H5SM_ih_size(H5F_t *f, hid_t dxpl_id, hsize_t *hdr_size, H5_ih_info_t *ih_info)
 	if(table->indexes[u].index_type == H5SM_BTREE) {
 	    if(H5F_addr_defined(table->indexes[u].index_addr)) {
                 /* Open the index v2 B-tree */
-                if(NULL == (bt2 = H5B2_open(f, dxpl_id, table->indexes[u].index_addr, f)))
+                if(NULL == (bt2 = H5B2_open(f, table->indexes[u].index_addr, f)))
                     HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for SOHM index")
 
-		if(H5B2_size(bt2, dxpl_id, &(ih_info->index_size)) < 0)
+		if(H5B2_size(bt2, &(ih_info->index_size)) < 0)
                     HGOTO_ERROR(H5E_SOHM, H5E_CANTGET, FAIL, "can't retrieve B-tree storage info")
 
                 /* Close the v2 B-tree */
-                if(H5B2_close(bt2, dxpl_id) < 0)
+                if(H5B2_close(bt2) < 0)
                     HGOTO_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for SOHM index")
                 bt2 = NULL;
             } /* end if */
@@ -2804,15 +2788,15 @@ H5SM_ih_size(H5F_t *f, hid_t dxpl_id, hsize_t *hdr_size, H5_ih_info_t *ih_info)
         /* Check for heap for this index */
 	if(H5F_addr_defined(table->indexes[u].heap_addr)) {
             /* Open the fractal heap for this index */
-            if(NULL == (fheap = H5HF_open(f, dxpl_id, table->indexes[u].heap_addr)))
+            if(NULL == (fheap = H5HF_open(f, table->indexes[u].heap_addr)))
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open fractal heap")
 
             /* Get heap storage size */
-	    if(H5HF_size(fheap, dxpl_id, &(ih_info->heap_size)) < 0)
+	    if(H5HF_size(fheap, &(ih_info->heap_size)) < 0)
 		HGOTO_ERROR(H5E_SOHM, H5E_CANTGET, FAIL, "can't retrieve fractal heap storage info")
 
             /* Close the fractal heap */
-            if(H5HF_close(fheap, dxpl_id) < 0)
+            if(H5HF_close(fheap) < 0)
                 HGOTO_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
             fheap = NULL;
         } /* end if */
@@ -2820,13 +2804,13 @@ H5SM_ih_size(H5F_t *f, hid_t dxpl_id, hsize_t *hdr_size, H5_ih_info_t *ih_info)
 
 done:
     /* Release resources */
-    if(fheap && H5HF_close(fheap, dxpl_id) < 0)
+    if(fheap && H5HF_close(fheap) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close fractal heap")
-    if(bt2 && H5B2_close(bt2, dxpl_id) < 0)
+    if(bt2 && H5B2_close(bt2) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "can't close v2 B-tree for SOHM index")
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
         HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
 } /* end H5SM_ih_size() */
 
diff --git a/src/H5SMbtree2.c b/src/H5SMbtree2.c
index 0110c1e..f0c4963 100644
--- a/src/H5SMbtree2.c
+++ b/src/H5SMbtree2.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
diff --git a/src/H5SMcache.c b/src/H5SMcache.c
index 455dd1a..f0b469a 100644
--- a/src/H5SMcache.c
+++ b/src/H5SMcache.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5SMmessage.c b/src/H5SMmessage.c
index 92b6a75..ad84b24 100644
--- a/src/H5SMmessage.c
+++ b/src/H5SMmessage.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -238,7 +236,7 @@ H5SM__message_compare(const void *rec1, const void *rec2, int *result)
          */
         if(mesg->location == H5SM_IN_HEAP) {
             /* Call heap op routine with comparison callback */
-            if(H5HF_op(key->fheap, key->dxpl_id, &(mesg->u.heap_loc.fheap_id), H5SM_compare_cb, &udata) < 0)
+            if(H5HF_op(key->fheap, &(mesg->u.heap_loc.fheap_id), H5SM_compare_cb, &udata) < 0)
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTCOMPARE, FAIL, "can't compare btree2 records")
         } /* end if */
         else {
@@ -263,7 +261,7 @@ H5SM__message_compare(const void *rec1, const void *rec2, int *result)
             /* Locate the right message and compare with it */
             op.op_type = H5O_MESG_OP_LIB;
             op.u.lib_op = H5SM_compare_iter_op;
-            if(H5O_msg_iterate(&oloc, mesg->msg_type_id, &op, &udata, key->dxpl_id) < 0)
+            if(H5O_msg_iterate(&oloc, mesg->msg_type_id, &op, &udata) < 0)
                 HGOTO_ERROR(H5E_SYM, H5E_NOTFOUND, FAIL, "error iterating over links")
         } /* end else */
 
diff --git a/src/H5SMmodule.h b/src/H5SMmodule.h
index b6991b6..656c7dd 100644
--- a/src/H5SMmodule.h
+++ b/src/H5SMmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5SMpkg.h b/src/H5SMpkg.h
index 342543d..a9a4fd9 100644
--- a/src/H5SMpkg.h
+++ b/src/H5SMpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -201,7 +199,6 @@ struct H5SM_master_table_t {
 /* Typedef for searching an index (list or B-tree) */
 typedef struct {
     H5F_t *file;                        /* File in which sharing is happening */
-    hid_t dxpl_id;                      /* DXPL for sharing messages in heap */
     H5HF_t *fheap;    			/* The heap for this message type, open. */
     void *encoding; 		        /* The message encoded, or NULL */
     size_t encoding_size; 		/* Size of the encoding, or 0 */
@@ -226,7 +223,6 @@ typedef struct {
 typedef struct {
     H5SM_mesg_key_t *key;       /* IN: key for message being incremented */
     H5O_fheap_id_t fheap_id;    /* OUT: fheap ID of record */
-    hid_t dxpl_id;
 } H5SM_incr_ref_opdata;
 
 /* v2 B-tree client callback context */
@@ -282,8 +278,7 @@ herr_t H5SM_list_free(H5SM_list_t *list);
 
 /* Testing functions */
 #ifdef H5SM_TESTING
-H5_DLL herr_t H5SM_get_mesg_count_test(H5F_t *f, hid_t dxpl_id, unsigned type_id,
-    size_t *mesg_count);
+H5_DLL herr_t H5SM__get_mesg_count_test(H5F_t *f, unsigned type_id, size_t *mesg_count);
 #endif /* H5SM_TESTING */
 
 #endif /* _H5SMpkg_H */
diff --git a/src/H5SMprivate.h b/src/H5SMprivate.h
index 57afacf..e6776f3 100644
--- a/src/H5SMprivate.h
+++ b/src/H5SMprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -49,32 +47,27 @@ typedef struct H5SM_master_table_t H5SM_master_table_t;
 /******************************/
 
 /* Generally useful shared message routines */
-H5_DLL herr_t H5SM_init(H5F_t *f, H5P_genplist_t *fc_plist,
-    const H5O_loc_t *ext_loc, hid_t dxpl_id);
-H5_DLL htri_t H5SM_can_share(H5F_t *f, hid_t dxpl_id, H5SM_master_table_t *table,
+H5_DLL herr_t H5SM_init(H5F_t *f, H5P_genplist_t *fc_plist, const H5O_loc_t *ext_loc);
+H5_DLL htri_t H5SM_can_share(H5F_t *f, H5SM_master_table_t *table,
     ssize_t *sohm_index_num, unsigned type_id, const void *mesg);
-H5_DLL htri_t H5SM_try_share(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    unsigned defer_flags, unsigned type_id, void *mesg, unsigned *mesg_flags);
-H5_DLL herr_t H5SM_delete(H5F_t *f, hid_t dxpl_id, H5O_t *open_oh,
-    H5O_shared_t *sh_mesg);
-H5_DLL herr_t H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist,
-    hid_t dxpl_id);
-H5_DLL htri_t H5SM_type_shared(H5F_t *f, unsigned type_id, hid_t dxpl_id);
-H5_DLL herr_t H5SM_get_fheap_addr(H5F_t *f, hid_t dxpl_id, unsigned type_id,
-    haddr_t *fheap_addr);
+H5_DLL htri_t H5SM_try_share(H5F_t *f, H5O_t *open_oh, unsigned defer_flags,
+    unsigned type_id, void *mesg, unsigned *mesg_flags);
+H5_DLL herr_t H5SM_delete(H5F_t *f, H5O_t *open_oh, H5O_shared_t *sh_mesg);
+H5_DLL herr_t H5SM_get_info(const H5O_loc_t *ext_loc, H5P_genplist_t *fc_plist);
+H5_DLL htri_t H5SM_type_shared(H5F_t *f, unsigned type_id);
+H5_DLL herr_t H5SM_get_fheap_addr(H5F_t *f, unsigned type_id, haddr_t *fheap_addr);
 H5_DLL herr_t H5SM_reconstitute(H5O_shared_t *sh_mesg, H5F_t *f,
     unsigned msg_type_id, H5O_fheap_id_t heap_id);
-H5_DLL herr_t H5SM_get_refcount(H5F_t *f, hid_t dxpl_id, unsigned type_id,
+H5_DLL herr_t H5SM_get_refcount(H5F_t *f, unsigned type_id,
     const H5O_shared_t *sh_mesg, hsize_t *ref_count);
-H5_DLL herr_t H5SM_ih_size(H5F_t *f, hid_t dxpl_id, hsize_t *hdr_size, H5_ih_info_t *ih_info);
+H5_DLL herr_t H5SM_ih_size(H5F_t *f, hsize_t *hdr_size, H5_ih_info_t *ih_info);
 
 
 /* Debugging routines */
-H5_DLL herr_t H5SM_table_debug(H5F_t *f, hid_t dxpl_id, haddr_t table_addr,
-    FILE *stream, int indent, int fwidth, unsigned table_vers,
-    unsigned num_indexes);
-H5_DLL herr_t H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr,
-    FILE *stream, int indent, int fwidth, haddr_t table_addr);
+H5_DLL herr_t H5SM_table_debug(H5F_t *f, haddr_t table_addr, FILE *stream,
+    int indent, int fwidth, unsigned table_vers, unsigned num_indexes);
+H5_DLL herr_t H5SM_list_debug(H5F_t *f, haddr_t list_addr, FILE *stream,
+    int indent, int fwidth, haddr_t table_addr);
 
 #endif /*_H5SMprivate_H*/
 
diff --git a/src/H5SMtest.c b/src/H5SMtest.c
index 798203d..490265c 100644
--- a/src/H5SMtest.c
+++ b/src/H5SMtest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -64,7 +62,7 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5SM_get_mesg_count_test
+ * Function:    H5SM__get_mesg_count_test
  *
  * Purpose:     Retrieve the number of messages tracked of a certain type
  *
@@ -76,13 +74,12 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_get_mesg_count_test(H5F_t *f, hid_t dxpl_id, unsigned type_id,
-    size_t *mesg_count)
+H5SM__get_mesg_count_test(H5F_t *f, unsigned type_id, size_t *mesg_count)
 {
     H5SM_master_table_t *table = NULL;  /* SOHM master table */
     herr_t ret_value = SUCCEED;         /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, H5AC__SOHM_TAG, FAIL)
+    FUNC_ENTER_PACKAGE_TAG(H5AC__SOHM_TAG)
 
     /* Sanity check */
     HDassert(f);
@@ -98,7 +95,7 @@ H5SM_get_mesg_count_test(H5F_t *f, hid_t dxpl_id, unsigned type_id,
         cache_udata.f = f;
 
         /* Look up the master SOHM table */
-        if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
+        if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), &cache_udata, H5AC__READ_ONLY_FLAG)))
             HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
         /* Find the correct index for this message type */
@@ -115,9 +112,9 @@ H5SM_get_mesg_count_test(H5F_t *f, hid_t dxpl_id, unsigned type_id,
 
 done:
     /* Release resources */
-    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
+    if(table && H5AC_unprotect(f, H5AC_SOHM_TABLE, H5F_SOHM_ADDR(f), table, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
-    FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
-} /* end H5SM_get_mesg_count_test() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5SM__get_mesg_count_test() */
 
diff --git a/src/H5ST.c b/src/H5ST.c
index 09c4600..dd5b63c 100644
--- a/src/H5ST.c
+++ b/src/H5ST.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* TERNARY SEARCH TREE ALGS
diff --git a/src/H5STprivate.h b/src/H5STprivate.h
index 9b49b07..07e9afe 100644
--- a/src/H5STprivate.h
+++ b/src/H5STprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Sall.c b/src/H5Sall.c
index 09adc15..11dd8e1 100644
--- a/src/H5Sall.c
+++ b/src/H5Sall.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Sdbg.c b/src/H5Sdbg.c
index 6548ffe..ebd05ce 100644
--- a/src/H5Sdbg.c
+++ b/src/H5Sdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -88,8 +86,7 @@
  *-------------------------------------------------------------------------
  */
 herr_t
-H5S_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream, int indent,
-    int fwidth)
+H5S_debug(H5F_t *f, const void *_mesg, FILE *stream, int indent, int fwidth)
 {
     const H5S_t	*mesg = (const H5S_t*)_mesg;
 
@@ -109,8 +106,7 @@ H5S_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream, int indent,
         case H5S_SIMPLE:
             fprintf(stream, "%*s%-*s H5S_SIMPLE\n", indent, "", fwidth,
                     "Space class:");
-            H5O_debug_id(H5O_SDSPACE_ID, f, dxpl_id, &(mesg->extent), stream,
-                                 indent + 3, MAX(0, fwidth - 3));
+            H5O_debug_id(H5O_SDSPACE_ID, f, &(mesg->extent), stream, indent + 3, MAX(0, fwidth - 3));
             break;
 
         case H5S_NO_CLASS:
diff --git a/src/H5Shyper.c b/src/H5Shyper.c
index 4fa773f..47eb573 100644
--- a/src/H5Shyper.c
+++ b/src/H5Shyper.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -7553,7 +7551,7 @@ H5Sselect_hyperslab(hid_t space_id, H5S_seloper_t op, const hsize_t start[],
     H5TRACE6("e", "iSs*h*h*h*h", space_id, op, start, stride, count, block);
 
     /* Check args */
-    if (NULL == (space=H5I_object_verify(space_id, H5I_DATASPACE)))
+    if (NULL == (space = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataspace")
     if (H5S_SCALAR==H5S_GET_EXTENT_TYPE(space))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "hyperslab doesn't support H5S_SCALAR space")
diff --git a/src/H5Smodule.h b/src/H5Smodule.h
index d4d94f2..962f0a2 100644
--- a/src/H5Smodule.h
+++ b/src/H5Smodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Smpio.c b/src/H5Smpio.c
index 0431590..5c65119 100644
--- a/src/H5Smpio.c
+++ b/src/H5Smpio.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -35,7 +33,7 @@
 #include "H5Oprivate.h"		/* Object headers		  	*/
 #include "H5Pprivate.h"         /* Property lists                       */
 #include "H5Spkg.h"		/* Dataspaces 				*/
-#include "H5VMprivate.h"		/* Vector and array functions		*/
+#include "H5VMprivate.h"        /* Vector and array functions		*/
 
 #ifdef H5_HAVE_PARALLEL
 
@@ -57,9 +55,42 @@ static herr_t H5S_mpio_span_hyper_type(const H5S_t *space, size_t elmt_size,
     MPI_Datatype *new_type, int *count, hbool_t *is_derived_type);
 static herr_t H5S_obtain_datatype(const hsize_t down[], H5S_hyper_span_t* span,
     const MPI_Datatype *elmt_type, MPI_Datatype *span_type, size_t elmt_size);
+static herr_t H5S_mpio_create_large_type (hsize_t, MPI_Aint, MPI_Datatype , MPI_Datatype *);
+
 
 #define H5S_MPIO_INITIAL_ALLOC_COUNT    256
 
+#define TWO_GIG_LIMIT                   2147483648
+
+#ifndef H5S_MAX_MPI_COUNT
+#define H5S_MAX_MPI_COUNT               536870911  /* (2^29)-1  */
+#endif
+
+static hsize_t bigio_count = H5S_MAX_MPI_COUNT;
+
+/*-------------------------------------------------------------------------
+ * Function:  H5S_mpio_set_bigio_count
+ *
+ * Purpose:   Allow us to programatically change the switch point
+ *            when we utilize derived datatypes.  This is of
+ *            particular interest for allowing nightly testing
+ *
+ * Return:    the current/previous value of bigio_count.
+ *
+ * Programmer: Richard Warren,  March 10, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+hsize_t
+H5S_mpio_set_bigio_count(hsize_t new_count)
+{
+    hsize_t orig_count = bigio_count;
+    if ((new_count > 0) && (new_count < TWO_GIG_LIMIT)) {
+       bigio_count = new_count;
+    }
+    return orig_count;
+}
+
 
 /*-------------------------------------------------------------------------
  * Function:	H5S_mpio_all_type
@@ -74,6 +105,11 @@ static herr_t H5S_obtain_datatype(const hsize_t down[], H5S_hyper_span_t* span,
  *		*is_derived_type  0 if MPI primitive type, 1 if derived
  *
  * Programmer:	rky 980813
+ * Modifications:
+ *              Mohamad Chaarawi
+ *              Adding support for large datatypes (beyond the limit of a
+ *              32 bit integer.
+ *
  *
  *-------------------------------------------------------------------------
  */
@@ -97,11 +133,22 @@ H5S_mpio_all_type(const H5S_t *space, size_t elmt_size,
     H5_CHECKED_ASSIGN(nelmts, hsize_t, snelmts, hssize_t);
 
     total_bytes = (hsize_t)elmt_size * nelmts;
-
-    /* fill in the return values */
-    *new_type = MPI_BYTE;
-    H5_CHECKED_ASSIGN(*count, int, total_bytes, hsize_t);
-    *is_derived_type = FALSE;
+    /* Verify that the size can be expressed as a 32 bit integer */
+    if(bigio_count >= total_bytes) {
+      /* fill in the return values */
+      *new_type = MPI_BYTE;
+      H5_CHECKED_ASSIGN(*count, int, total_bytes, hsize_t);
+      *is_derived_type = FALSE;
+    }
+    else {
+      /* Create a LARGE derived datatype for this transfer */
+      if (H5S_mpio_create_large_type (total_bytes, 0, MPI_BYTE, new_type) < 0) {
+          HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL,
+                      "couldn't create a large datatype from the all selection")
+      }
+      *count = 1;
+      *is_derived_type = TRUE;
+    }
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -169,27 +216,103 @@ H5S_mpio_create_point_datatype (size_t elmt_size, hsize_t num_points,
         HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
     elmt_type_created = TRUE;
 
+    /* Check whether standard or BIGIO processing will be employeed */
+    if(bigio_count >= num_points) {
 #if MPI_VERSION >= 3
-    /* Create an MPI datatype for the whole point selection */
-    if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed_block((int)num_points, 1, disp, elmt_type, new_type)))
-        HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_indexed_block failed", mpi_code)
+      /* Create an MPI datatype for the whole point selection */
+      if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed_block((int)num_points, 1, disp, elmt_type, new_type)))
+         HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_indexed_block failed", mpi_code)
 #else
-    /* Allocate block sizes for MPI datatype call */
-    if(NULL == (blocks = (int *)H5MM_malloc(sizeof(int) * num_points)))
-        HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate array of blocks")
+      /* Allocate block sizes for MPI datatype call */
+      if(NULL == (blocks = (int *)H5MM_malloc(sizeof(int) * num_points)))
+          HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate array of blocks")
 
-    for(u = 0; u < num_points; u++)
-        blocks[u] = 1;
+      for(u = 0; u < num_points; u++)
+          blocks[u] = 1;
 
-    /* Create an MPI datatype for the whole point selection */
-    if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed((int)num_points, blocks, disp, elmt_type, new_type)))
-        HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_indexed_block failed", mpi_code)
+      /* Create an MPI datatype for the whole point selection */
+      if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed((int)num_points, blocks, disp, elmt_type, new_type)))
+          HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed failed", mpi_code)
 #endif
 
-    /* Commit MPI datatype for later use */
-    if(MPI_SUCCESS != (mpi_code = MPI_Type_commit(new_type)))
-        HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+      /* Commit MPI datatype for later use */
+      if(MPI_SUCCESS != (mpi_code = MPI_Type_commit(new_type)))
+          HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+    }
+    else { 
+      /* use LARGE_DATATYPE::
+       * We'll create an hindexed_block type for every 2G point count and then combine
+       * those and any remaining points into a single large datatype.
+       */
+      int total_types, i;
+      int remaining_points;
+      int num_big_types;
+      hsize_t leftover;
+
+      int *inner_blocks;
+      MPI_Aint *inner_disps;
+      MPI_Datatype *inner_types = NULL;
+
+      /* Calculate how many Big MPI datatypes are needed to represent the buffer */
+      num_big_types = (int)(num_points/bigio_count);
+
+      leftover = (hsize_t)num_points - (hsize_t)num_big_types * (hsize_t)bigio_count;
+      H5_CHECKED_ASSIGN(remaining_points, int, leftover, hsize_t);
+
+      total_types = (int)(remaining_points) ? (num_big_types + 1) : num_big_types;
+
+      /* Allocate array if MPI derived types needed */
+      if(NULL == (inner_types = (MPI_Datatype *)H5MM_malloc((sizeof(MPI_Datatype) * (size_t)total_types))))
+          HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate array of blocks")
+
+      if(NULL == (inner_blocks = (int *)H5MM_malloc(sizeof(int) * (size_t)total_types)))
+          HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate array of blocks")
+
+      if(NULL == (inner_disps = (MPI_Aint *)H5MM_malloc(sizeof(MPI_Aint) * (size_t)total_types)))
+          HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate array of blocks")
+
+      for(i=0 ; i<num_big_types ; i++) {
+          if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed_block(bigio_count,
+                                                                       1,
+                                                                       &disp[i*bigio_count],
+                                                                       elmt_type,
+                                                                       &inner_types[i]))) {
+             HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed_block failed", mpi_code);
+          }
+          inner_blocks[i] = 1;
+          inner_disps[i]  = 0;
+      }
+
+      if(remaining_points) {
+          if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed_block(remaining_points,
+                                                                       1,
+                                                                       &disp[num_big_types*bigio_count],
+                                                                       elmt_type,
+                                                                       &inner_types[num_big_types]))) {
+              HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed_block failed", mpi_code);
+	  }
+          inner_blocks[num_big_types] = 1;
+          inner_disps[num_big_types] = 0;
+        }
+
+      if(MPI_SUCCESS != (mpi_code = MPI_Type_create_struct(total_types,
+                                                           inner_blocks,
+                                                           inner_disps,
+                                                           inner_types,
+                                                           new_type))) {
+          HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_struct", mpi_code);
+      }
+      for(i=0 ; i<total_types ; i++)
+          MPI_Type_free(&inner_types[i]);
+
+      H5MM_free(inner_types);
+      H5MM_free(inner_blocks);
+      H5MM_free(inner_disps);
 
+      /* Commit MPI datatype for later use */
+      if(MPI_SUCCESS != (mpi_code = MPI_Type_commit(new_type)))
+          HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+    }
 done:
     if(elmt_type_created)
         MPI_Type_free(&elmt_type);
@@ -483,7 +606,10 @@ done:
  *		*is_derived_type  0 if MPI primitive type, 1 if derived
  *
  * Programmer:	rky 980813
- *
+ * Modifications:
+ *              Mohamad Chaarawi
+ *              Adding support for large datatypes (beyond the limit of a
+ *              32 bit integer.
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -638,8 +764,25 @@ H5S_mpio_hyper_type(const H5S_t *space, size_t elmt_size,
         HDfprintf(H5DEBUG(S), "d[%d].xtent=%Hu \n", i, d[i].xtent);
   }
 #endif
-    if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous((int)elmt_size, MPI_BYTE, &inner_type)))
+
+    /* LARGE_DATATYPE::
+     * Check if the number of elements to form the inner type fits into a 32 bit integer. 
+     * If yes then just create the innertype with MPI_Type_contiguous.
+     * Otherwise create a compound datatype by iterating as many times as needed
+     * for the innertype to be created.
+     */
+    if(bigio_count >= elmt_size) {
+      /* Use a single MPI datatype that has a 32 bit size */
+      if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous((int)elmt_size, MPI_BYTE, &inner_type)))
         HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+    }
+    else {
+      /* Create the compound datatype for this operation (> 2GB) */
+      if (H5S_mpio_create_large_type (elmt_size, 0, MPI_BYTE, &inner_type) < 0) {
+        HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL,
+            "couldn't ccreate a large inner datatype in hyper selection")
+      }
+    }
 
 /*******************************************************
 *  Construct the type by walking the hyperslab dims
@@ -647,30 +790,93 @@ H5S_mpio_hyper_type(const H5S_t *space, size_t elmt_size,
 *******************************************************/
     for(i = ((int)rank) - 1; i >= 0; --i) {
 #ifdef H5S_DEBUG
-  if(H5DEBUG(S))
-    HDfprintf(H5DEBUG(S), "%s: Dimension i=%d \n"
-            "start=%Hd count=%Hu block=%Hu stride=%Hu, xtent=%Hu max_xtent=%d\n",
-            FUNC, i, d[i].start, d[i].count, d[i].block, d[i].strid, d[i].xtent, max_xtent[i]);
+       if(H5DEBUG(S))
+          HDfprintf(H5DEBUG(S), "%s: Dimension i=%d \n"
+             "start=%Hd count=%Hu block=%Hu stride=%Hu, xtent=%Hu max_xtent=%d\n",
+             FUNC, i, d[i].start, d[i].count, d[i].block, d[i].strid, d[i].xtent, max_xtent[i]);
 #endif
 
 #ifdef H5S_DEBUG
-  if(H5DEBUG(S))
-    HDfprintf(H5DEBUG(S), "%s: i=%d  Making vector-type \n", FUNC,i);
+       if(H5DEBUG(S))
+          HDfprintf(H5DEBUG(S), "%s: i=%d  Making vector-type \n", FUNC,i);
 #endif
        /****************************************
        *  Build vector type of the selection.
        ****************************************/
-	mpi_code = MPI_Type_vector((int)(d[i].count),       /* count */
-				   (int)(d[i].block),       /* blocklength */
-				   (int)(d[i].strid),       /* stride */
-				   inner_type,	            /* old type */
-				   &outer_type);            /* new type */
+       if (bigio_count >= d[i].count &&
+           bigio_count >= d[i].block &&
+           bigio_count >= d[i].strid) {
+
+           /* All the parameters fit into 32 bit integers so create the vector type normally */
+           mpi_code = MPI_Type_vector((int)(d[i].count),       /* count */
+                                      (int)(d[i].block),       /* blocklength */
+                                      (int)(d[i].strid),       /* stride */
+                                      inner_type,              /* old type */
+                                      &outer_type);            /* new type */
+
+           MPI_Type_free(&inner_type);
+           if(mpi_code != MPI_SUCCESS)
+              HMPI_GOTO_ERROR(FAIL, "couldn't create MPI vector type", mpi_code)
+       }
+       else {
+         /* Things get a bit more complicated and require LARGE_DATATYPE processing 
+          * There are two MPI datatypes that need to be created: 
+          *   1) an internal contiguous block; and
+          *   2) a collection of elements where an element is a contiguous block(1).
+          * Remember that the input arguments to the MPI-IO functions use integer
+          * values to represent element counts.  We ARE allowed however, in the
+          * more recent MPI implementations to use constructed datatypes whereby
+          * the total number of bytes in a transfer could be :
+          *   (2GB-1)number_of_blocks * the_datatype_extent.
+          */
+
+            MPI_Aint stride_in_bytes, inner_extent;
+            MPI_Datatype block_type;
+
+            /* create a contiguous datatype inner_type x number of BLOCKS.
+             * Again we need to check that the number of BLOCKS can fit into 
+             * a 32 bit integer */
+            if (bigio_count < d[i].block) {
+                if (H5S_mpio_create_large_type(d[i].block, 0, inner_type, 
+                                               &block_type) < 0) {
+                    HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL,
+                                "couldn't ccreate a large block datatype in hyper selection")
+                }
+            }
+            else {
+                if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous((int)d[i].block, 
+                                                                  inner_type, 
+                                                                  &block_type)))
+                    HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+            }
 
-        MPI_Type_free(&inner_type);
-        if(mpi_code != MPI_SUCCESS)
-            HMPI_GOTO_ERROR(FAIL, "couldn't create MPI vector type", mpi_code)
+            MPI_Type_extent (inner_type, &inner_extent);
+            stride_in_bytes = inner_extent * (MPI_Aint)d[i].strid;
 
-        /****************************************
+            /* If the element count is larger than what a 32 bit integer can hold,
+             * we call the large type creation function to handle that
+             */
+            if (bigio_count < d[i].count) {
+                if (H5S_mpio_create_large_type (d[i].count, stride_in_bytes, block_type,
+                                                &outer_type) < 0) {
+                    HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL,
+                                "couldn't create a large outer datatype in hyper selection")
+                }
+            }
+            /* otherwise a regular create_hvector will do */
+            else {
+                mpi_code = MPI_Type_create_hvector((int)d[i].count, /* count */
+                                                   1,               /* blocklength */
+                                                   stride_in_bytes, /* stride in bytes*/
+                                                   block_type,      /* old type */
+                                                   &outer_type);    /* new type */
+                if(MPI_SUCCESS != mpi_code)
+                    HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hvector failed", mpi_code)
+            }
+            MPI_Type_free(&block_type);
+            MPI_Type_free(&inner_type);
+       }
+       /****************************************
         *  Then build the dimension type as (start, vector type, xtent).
         ****************************************/
         /* calculate start and extent values of this dimension */
@@ -754,6 +960,10 @@ done:
  *
  * Programmer:  kyang
  *
+ * Modifications:
+ *              Mohamad Chaarawi
+ *              Adding support for large datatypes (beyond the limit of a 
+ *              32 bit integer.
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -776,8 +986,17 @@ H5S_mpio_span_hyper_type(const H5S_t *space, size_t elmt_size,
     HDassert(space->select.sel_info.hslab->span_lst->head);
 
     /* Create the base type for an element */
-    if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous((int)elmt_size, MPI_BYTE, &elmt_type)))
-        HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+    if (bigio_count >= elmt_size) {
+      if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous((int)elmt_size, MPI_BYTE, &elmt_type))) {
+           HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+      }
+    }
+    else {
+        if (H5S_mpio_create_large_type (elmt_size, 0, MPI_BYTE, &elmt_type) < 0) {
+            HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL,
+                        "couldn't create a large element datatype in span_hyper selection")
+        }
+    }
     elmt_type_is_derived = TRUE;
 
     /* Compute 'down' sizes for each dimension */
@@ -823,14 +1042,15 @@ static herr_t
 H5S_obtain_datatype(const hsize_t *down, H5S_hyper_span_t *span,
     const MPI_Datatype *elmt_type, MPI_Datatype *span_type, size_t elmt_size)
 {
-    size_t                alloc_count;          /* Number of span tree nodes allocated at this level */
-    size_t                outercount;           /* Number of span tree nodes at this level */
+    size_t                alloc_count = 0;      /* Number of span tree nodes allocated at this level */
+    size_t                outercount = 0;       /* Number of span tree nodes at this level */
     MPI_Datatype          *inner_type = NULL;
     hbool_t inner_types_freed = FALSE;          /* Whether the inner_type MPI datatypes have been freed */
     hbool_t span_type_valid = FALSE;            /* Whether the span_type MPI datatypes is valid */
+    hbool_t large_block = FALSE;                /* Wether the block length is larger than 32 bit integer */
     int                   *blocklen = NULL;
     MPI_Aint              *disp = NULL;
-    H5S_hyper_span_t      *tspan;               /* Temporary pointer to span tree node */
+    H5S_hyper_span_t      *tspan = NULL;        /* Temporary pointer to span tree node */
     int                   mpi_code;             /* MPI return status code */
     herr_t                ret_value = SUCCEED;  /* Return value */
 
@@ -872,14 +1092,70 @@ H5S_obtain_datatype(const hsize_t *down, H5S_hyper_span_t *span,
             disp[outercount]      = (MPI_Aint)elmt_size * tspan->low;
             H5_CHECK_OVERFLOW(tspan->nelem, hsize_t, int)
             blocklen[outercount]  = (int)tspan->nelem;
-
             tspan                 = tspan->next;
+
+            if (bigio_count < blocklen[outercount]) {
+                large_block = TRUE; /* at least one block type is large, so set this flag to true */
+            }
+
             outercount++;
         } /* end while */
 
-        if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed((int)outercount, blocklen, disp, *elmt_type, span_type)))
-              HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed failed", mpi_code)
-        span_type_valid = TRUE;
+        /* Everything fits into integers, so cast them and use hindexed */
+        if (bigio_count >= outercount && large_block == FALSE) {
+
+            if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hindexed((int)outercount, blocklen, disp, *elmt_type, span_type)))
+               HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hindexed failed", mpi_code)
+            span_type_valid = TRUE;
+        }
+	else { /* LARGE_DATATYPE:: Something doesn't fit into a 32 bit integer */
+            size_t i;
+
+            for (i=0 ; i<outercount ; i++) {
+	      MPI_Datatype temp_type = MPI_DATATYPE_NULL, outer_type = MPI_DATATYPE_NULL;
+                /* create the block type from elmt_type while checking the 32 bit int limit */
+                if (blocklen[i] > bigio_count) {
+                    if (H5S_mpio_create_large_type (blocklen[i], 0, *elmt_type, &temp_type) < 0) {
+                        HGOTO_ERROR(H5E_DATASPACE, H5E_BADTYPE, FAIL,
+                                    "couldn't create a large element datatype in span_hyper selection")
+                    }
+                }
+                else {
+                    if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous((int)blocklen[i], 
+                                                                      *elmt_type, 
+                                                                      &temp_type)))
+                        HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+                }
+
+                /* combine the current datatype that is created with this current block type */
+                if (0 == i) { /* first iteration, there is no combined datatype yet */
+                    *span_type = temp_type;
+                }
+                else {
+                    int bl[2] = {1,1};
+                    MPI_Aint ds[2] = {disp[i-1],disp[i]};
+                    MPI_Datatype dt[2] = {*span_type, temp_type};
+
+                    if (MPI_SUCCESS != (mpi_code = MPI_Type_create_struct (2,              /* count */
+                                                                           bl,             /* blocklength */
+                                                                           ds,             /* stride in bytes*/
+                                                                           dt,             /* old type */
+                                                                           &outer_type))){ /* new type */
+                        HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_struct failed", mpi_code)
+                    }
+		    *span_type = outer_type;
+                }
+
+		if (outer_type != MPI_DATATYPE_NULL) 
+		  MPI_Type_free(&outer_type);
+		/* temp_type shouldn't be freed here...
+		 * Note that we have simply copied it above (not MPI_Type_dup)
+		 * into the 'span_type' argument of the caller. 
+		 * The caller needs to deal with it there!
+		 */
+            }
+        } /* end (LARGE_DATATYPE::) */
+
     } /* end if */
     else {
         size_t u;               /* Local index variable */
@@ -1093,5 +1369,139 @@ H5S_mpio_space_type(const H5S_t *space, size_t elmt_size, MPI_Datatype *new_type
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5S_mpio_space_type() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5S_mpio_create_large_type
+ *
+ * Purpose:     Create a large datatype of size larger than what a 32 bit integer 
+ *              can hold.
+ *
+ * Return:      non-negative on success, negative on failure.
+ *
+ *              *new_type    the new datatype created
+ *
+ * Programmer:  Mohamad Chaarawi
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t H5S_mpio_create_large_type (hsize_t num_elements,
+                                          MPI_Aint stride_bytes,
+                                          MPI_Datatype old_type,
+                                          MPI_Datatype *new_type)
+{
+    int           num_big_types;          /* num times the 2G datatype will be repeated */
+    int           remaining_bytes;        /* the number of bytes left that can be held in an int value */
+    hsize_t       leftover;
+    int           block_len[2];
+    int           mpi_code;               /* MPI return code */
+    MPI_Datatype  inner_type, outer_type, leftover_type, type[2];
+    MPI_Aint      disp[2], old_extent;
+    herr_t        ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Calculate how many Big MPI datatypes are needed to represent the buffer */
+    num_big_types = (int)(num_elements/bigio_count);
+    leftover = num_elements - num_big_types * (hsize_t)bigio_count;
+    H5_CHECKED_ASSIGN(remaining_bytes, int, leftover, hsize_t);
+
+    /* Create a contiguous datatype of size equal to the largest
+     * number that a 32 bit integer can hold x size of old type.
+     * If the displacement is 0, then the type is contiguous, otherwise
+     * use type_hvector to create the type with the displacement provided
+     */
+    if (0 == stride_bytes) {
+        if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous(bigio_count,
+                                                          old_type,
+                                                          &inner_type))) {
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+        }
+    }
+    else {
+        if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hvector (bigio_count,
+                                                               1,
+                                                               stride_bytes,
+                                                               old_type,
+                                                               &inner_type))) {
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hvector failed", mpi_code)
+        }
+    }
+
+    /* Create a contiguous datatype of the buffer (minus the remaining < 2GB part)
+     * If a stride is present, use hvector type
+     */
+    if (0 == stride_bytes) {
+        if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous(num_big_types,
+                                                          inner_type,
+                                                          &outer_type))) {
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+        }
+    }
+    else {
+        if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hvector (num_big_types,
+                                                               1,
+                                                               stride_bytes,
+                                                               inner_type,
+                                                               &outer_type))) {
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hvector failed", mpi_code)
+        }
+    }
+
+    MPI_Type_free(&inner_type);
+
+    /* If there is a remaining part create a contiguous/vector datatype and then
+     * use a struct datatype to encapsulate everything.
+     */
+    if(remaining_bytes) {
+        if (stride_bytes == 0) {
+            if(MPI_SUCCESS != (mpi_code = MPI_Type_contiguous (remaining_bytes,
+                                                               old_type,
+                                                               &leftover_type))) {
+                HMPI_GOTO_ERROR(FAIL, "MPI_Type_contiguous failed", mpi_code)
+            }
+        }
+        else {
+            if(MPI_SUCCESS != (mpi_code = MPI_Type_create_hvector
+                               ((int)(num_elements - (hsize_t)num_big_types*bigio_count),
+                                1,
+                                stride_bytes,
+                                old_type,
+                                &leftover_type))) {
+                HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_hvector failed", mpi_code)
+            }
+        }
+
+        MPI_Type_extent (old_type, &old_extent);
+
+        /* Set up the arguments for MPI_Type_struct constructor */
+        type[0] = outer_type;
+        type[1] = leftover_type;
+        block_len[0] = 1;
+        block_len[1] = 1;
+        disp[0] = 0;
+        disp[1] = (old_extent+stride_bytes)*num_big_types*(MPI_Aint)bigio_count;
+
+        if(MPI_SUCCESS != (mpi_code =
+                           MPI_Type_create_struct(2, block_len, disp, type, new_type))) {
+            HMPI_GOTO_ERROR(FAIL, "MPI_Type_create_struct failed", mpi_code)
+        }
+
+        MPI_Type_free(&outer_type);
+        MPI_Type_free(&leftover_type);
+    }
+    else {
+        /* There are no remaining bytes so just set the new type to
+         * the outer type created */
+        *new_type = outer_type;
+    }
+
+    if(MPI_SUCCESS != (mpi_code = MPI_Type_commit(new_type)))
+        HMPI_GOTO_ERROR(FAIL, "MPI_Type_commit failed", mpi_code)
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5S_mpio_create_large_type */
+
 #endif  /* H5_HAVE_PARALLEL */
 
diff --git a/src/H5Snone.c b/src/H5Snone.c
index 55db358..19d0b5f 100644
--- a/src/H5Snone.c
+++ b/src/H5Snone.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Spkg.h b/src/H5Spkg.h
index a60d333..6ded287 100644
--- a/src/H5Spkg.h
+++ b/src/H5Spkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -267,6 +265,9 @@ H5_DLLVAR const H5S_select_class_t H5S_sel_none[1];
  */
 H5_DLLVAR const H5S_select_class_t H5S_sel_point[1];
 
+/* Array of versions for Dataspace */
+H5_DLLVAR const unsigned H5O_sdspace_ver_bounds[H5F_LIBVER_NBOUNDS];
+
 /* Extent functions */
 H5_DLL herr_t H5S_extent_release(H5S_extent_t *extent);
 H5_DLL herr_t H5S_extent_copy_real(H5S_extent_t *dst, const H5S_extent_t *src,
diff --git a/src/H5Spoint.c b/src/H5Spoint.c
index 9f273db..442bb2a 100644
--- a/src/H5Spoint.c
+++ b/src/H5Spoint.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Sprivate.h b/src/H5Sprivate.h
index ca8d067..b4ae1ff 100644
--- a/src/H5Sprivate.h
+++ b/src/H5Sprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -19,6 +17,9 @@
 #ifndef _H5Sprivate_H
 #define _H5Sprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5S_t H5S_t;
+
 /* Include package's public header */
 #include "H5Spublic.h"
 
@@ -46,7 +47,6 @@
 #define H5S_GET_SEQ_LIST_SORTED         0x0001
 
 /* Forward references of package typedefs */
-typedef struct H5S_t H5S_t;
 typedef struct H5S_extent_t H5S_extent_t;
 typedef struct H5S_pnt_node_t H5S_pnt_node_t;
 typedef struct H5S_hyper_span_t H5S_hyper_span_t;
@@ -207,10 +207,9 @@ H5_DLL hbool_t H5S_has_extent(const H5S_t *ds);
 H5_DLL int H5S_get_simple_extent_ndims(const H5S_t *ds);
 H5_DLL int H5S_get_simple_extent_dims(const H5S_t *ds, hsize_t dims[]/*out*/,
     hsize_t max_dims[]/*out*/);
-H5_DLL herr_t H5S_write(H5F_t *f, hid_t dxpl_id, H5O_t *oh, unsigned update_flags,
-    H5S_t *ds);
-H5_DLL herr_t H5S_append(H5F_t *f, hid_t dxpl_id, struct H5O_t *oh, H5S_t *ds);
-H5_DLL H5S_t *H5S_read(const struct H5O_loc_t *loc, hid_t dxpl_id);
+H5_DLL herr_t H5S_write(H5F_t *f, H5O_t *oh, unsigned update_flags, H5S_t *ds);
+H5_DLL herr_t H5S_append(H5F_t *f, struct H5O_t *oh, H5S_t *ds);
+H5_DLL H5S_t *H5S_read(const struct H5O_loc_t *loc);
 H5_DLL htri_t H5S_set_extent(H5S_t *space, const hsize_t *size);
 H5_DLL herr_t H5S_set_extent_real(H5S_t *space, const hsize_t *size);
 H5_DLL herr_t H5S_set_extent_simple(H5S_t *space, unsigned rank,
@@ -218,14 +217,11 @@ H5_DLL herr_t H5S_set_extent_simple(H5S_t *space, unsigned rank,
 H5_DLL H5S_t *H5S_create(H5S_class_t type);
 H5_DLL H5S_t *H5S_create_simple(unsigned rank, const hsize_t dims[/*rank*/],
     const hsize_t maxdims[/*rank*/]);
-H5_DLL herr_t H5S_set_latest_version(H5S_t *ds);
+H5_DLL herr_t H5S_set_version(H5F_t *f, H5S_t *ds);
 H5_DLL herr_t H5S_encode(H5S_t *obj, unsigned char **p, size_t *nalloc);
 H5_DLL H5S_t *H5S_decode(const unsigned char **p);
-H5_DLL herr_t H5S_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE *stream,
-    int indent, int fwidth);
-#ifndef H5_NO_DEPRECATED_SYMBOLS
-H5_DLL int H5S_extend(H5S_t *space, const hsize_t *size);
-#endif /* H5_NO_DEPRECATED_SYMBOLS */
+H5_DLL herr_t H5S_debug(H5F_t *f, const void *_mesg, FILE *stream, int indent,
+    int fwidth);
 
 /* Operations on dataspace extents */
 H5_DLL hsize_t H5S_extent_nelem(const H5S_extent_t *ext);
@@ -312,6 +308,7 @@ H5_DLL herr_t H5S_select_iter_next(H5S_sel_iter_t *sel_iter, size_t nelem);
 H5_DLL herr_t H5S_select_iter_release(H5S_sel_iter_t *sel_iter);
 
 #ifdef H5_HAVE_PARALLEL
+H5_DLL hsize_t H5S_mpio_set_bigio_count(hsize_t new_count);
 H5_DLL herr_t H5S_mpio_space_type(const H5S_t *space, size_t elmt_size,
     /* out: */  MPI_Datatype *new_type,
                 int *count,
diff --git a/src/H5Spublic.h b/src/H5Spublic.h
index 37bcef0..09b474a 100644
--- a/src/H5Spublic.h
+++ b/src/H5Spublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Sselect.c b/src/H5Sselect.c
index 1ad7438..4462295 100644
--- a/src/H5Sselect.c
+++ b/src/H5Sselect.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.ued>
diff --git a/src/H5Stest.c b/src/H5Stest.c
index e1f4b61..a7bee2b 100644
--- a/src/H5Stest.c
+++ b/src/H5Stest.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Quincey Koziol <koziol@ncsa.uiuc.edu>
diff --git a/src/H5T.c b/src/H5T.c
index 0fb8b91..c220890 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -24,24 +22,25 @@
 /* Module Setup */
 /****************/
 
-#include "H5Tmodule.h"          /* This source code file is part of the H5T module */
+#include "H5Tmodule.h"      /* This source code file is part of the H5T module */
 
 
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Dprivate.h"		/* Datasets				*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* Files				*/
-#include "H5FLprivate.h"	/* Free Lists				*/
-#include "H5FOprivate.h"	/* File objects				*/
-#include "H5Gprivate.h"		/* Groups				*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Pprivate.h"         /* Property lists                       */
-#include "H5Tpkg.h"		/* Datatypes 				*/
+#include "H5private.h"      /* Generic Functions        */
+#include "H5ACprivate.h"    /* Metadata cache           */
+#include "H5CXprivate.h"    /* API Contexts             */
+#include "H5Dprivate.h"     /* Datasets                 */
+#include "H5Eprivate.h"     /* Error handling           */
+#include "H5Fprivate.h"     /* Files                    */
+#include "H5FLprivate.h"    /* Free Lists               */
+#include "H5FOprivate.h"    /* File objects             */
+#include "H5Gprivate.h"     /* Groups                   */
+#include "H5Iprivate.h"     /* IDs                      */
+#include "H5MMprivate.h"    /* Memory management        */
+#include "H5Pprivate.h"     /* Property lists           */
+#include "H5Tpkg.h"         /* Datatypes                */
 
 /* Check for header needed for SGI floating-point code */
 #ifdef H5_HAVE_SYS_FPU_H
@@ -65,209 +64,222 @@
  */
 
 /* Define the code template for bitfields for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_BITFIELD_CORE {					      \
-    dt->shared->type = H5T_BITFIELD;					      \
+#define H5T_INIT_TYPE_BITFIELD_CORE {                       \
+    dt->shared->type = H5T_BITFIELD;                        \
+}
+
+#define H5T_INIT_TYPE_BITFIELD_COMMON(ENDIANNESS) {            \
+    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)                       \
+    H5T_INIT_TYPE_BITFIELD_CORE;                               \
+}
+
+#define H5T_INIT_TYPE_BITFIELDLE_CORE {                        \
+    H5T_INIT_TYPE_BITFIELD_COMMON(H5T_ORDER_LE)                \
+}
+
+#define H5T_INIT_TYPE_BITFIELDBE_CORE {                        \
+    H5T_INIT_TYPE_BITFIELD_COMMON(H5T_ORDER_BE)                \
 }
 
 /* Define the code template for times for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_TIME_CORE {					      \
-    dt->shared->type = H5T_TIME;					      \
+#define H5T_INIT_TYPE_TIME_CORE {                           \
+    dt->shared->type = H5T_TIME;                            \
 }
 
 /* Define the code template for types which reset the offset for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_OFFSET_CORE {					      \
-    dt->shared->u.atomic.offset = 0;					      \
+#define H5T_INIT_TYPE_OFFSET_CORE {                         \
+    dt->shared->u.atomic.offset = 0;                        \
 }
 
 /* Define common code for all numeric types (floating-point & int, signed & unsigned) */
-#define H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS) {				      \
-    dt->shared->u.atomic.order = ENDIANNESS;				      \
-    dt->shared->u.atomic.offset = 0;					      \
-    dt->shared->u.atomic.lsb_pad = H5T_PAD_ZERO;			      \
-    dt->shared->u.atomic.msb_pad = H5T_PAD_ZERO;			      \
+#define H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS) {              \
+    dt->shared->u.atomic.order = ENDIANNESS;                \
+    dt->shared->u.atomic.offset = 0;                        \
+    dt->shared->u.atomic.lsb_pad = H5T_PAD_ZERO;            \
+    dt->shared->u.atomic.msb_pad = H5T_PAD_ZERO;            \
 }
 
 /* Define the code templates for standard floats for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_FLOAT_COMMON(ENDIANNESS) {			      \
-    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)				      \
-    dt->shared->u.atomic.u.f.sign = 31;					      \
-    dt->shared->u.atomic.u.f.epos = 23;					      \
-    dt->shared->u.atomic.u.f.esize = 8;					      \
-    dt->shared->u.atomic.u.f.ebias = 0x7f;				      \
-    dt->shared->u.atomic.u.f.mpos = 0;					      \
-    dt->shared->u.atomic.u.f.msize = 23;				      \
-    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;			      \
-    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;			      \
+#define H5T_INIT_TYPE_FLOAT_COMMON(ENDIANNESS) {            \
+    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)                    \
+    dt->shared->u.atomic.u.f.sign = 31;                     \
+    dt->shared->u.atomic.u.f.epos = 23;                     \
+    dt->shared->u.atomic.u.f.esize = 8;                     \
+    dt->shared->u.atomic.u.f.ebias = 0x7f;                  \
+    dt->shared->u.atomic.u.f.mpos = 0;                      \
+    dt->shared->u.atomic.u.f.msize = 23;                    \
+    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;       \
+    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;            \
 }
 
-#define H5T_INIT_TYPE_FLOATLE_CORE {					      \
-    H5T_INIT_TYPE_FLOAT_COMMON(H5T_ORDER_LE)				      \
+#define H5T_INIT_TYPE_FLOATLE_CORE {                        \
+    H5T_INIT_TYPE_FLOAT_COMMON(H5T_ORDER_LE)                \
 }
 
-#define H5T_INIT_TYPE_FLOATBE_CORE {					      \
-    H5T_INIT_TYPE_FLOAT_COMMON(H5T_ORDER_BE)				      \
+#define H5T_INIT_TYPE_FLOATBE_CORE {                        \
+    H5T_INIT_TYPE_FLOAT_COMMON(H5T_ORDER_BE)                \
 }
 
 /* Define the code templates for standard doubles for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_DOUBLE_COMMON(ENDIANNESS) {			      \
-    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)				      \
-    dt->shared->u.atomic.u.f.sign = 63;					      \
-    dt->shared->u.atomic.u.f.epos = 52;					      \
-    dt->shared->u.atomic.u.f.esize = 11;				      \
-    dt->shared->u.atomic.u.f.ebias = 0x03ff;				      \
-    dt->shared->u.atomic.u.f.mpos = 0;					      \
-    dt->shared->u.atomic.u.f.msize = 52;				      \
-    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;			      \
-    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;			      \
+#define H5T_INIT_TYPE_DOUBLE_COMMON(ENDIANNESS) {           \
+    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)                    \
+    dt->shared->u.atomic.u.f.sign = 63;                     \
+    dt->shared->u.atomic.u.f.epos = 52;                     \
+    dt->shared->u.atomic.u.f.esize = 11;                    \
+    dt->shared->u.atomic.u.f.ebias = 0x03ff;                \
+    dt->shared->u.atomic.u.f.mpos = 0;                      \
+    dt->shared->u.atomic.u.f.msize = 52;                    \
+    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;       \
+    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;            \
 }
 
-#define H5T_INIT_TYPE_DOUBLELE_CORE {					      \
-    H5T_INIT_TYPE_DOUBLE_COMMON(H5T_ORDER_LE)				      \
+#define H5T_INIT_TYPE_DOUBLELE_CORE {                       \
+    H5T_INIT_TYPE_DOUBLE_COMMON(H5T_ORDER_LE)               \
 }
 
-#define H5T_INIT_TYPE_DOUBLEBE_CORE {					      \
-    H5T_INIT_TYPE_DOUBLE_COMMON(H5T_ORDER_BE)				      \
+#define H5T_INIT_TYPE_DOUBLEBE_CORE {                       \
+    H5T_INIT_TYPE_DOUBLE_COMMON(H5T_ORDER_BE)               \
 }
 
 /* Define the code templates for VAX float for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_FLOATVAX_CORE {			                      \
-    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_VAX)				      \
-    dt->shared->u.atomic.u.f.sign = 31;					      \
-    dt->shared->u.atomic.u.f.epos = 23;					      \
-    dt->shared->u.atomic.u.f.esize = 8;					      \
-    dt->shared->u.atomic.u.f.ebias = 0x81;				      \
-    dt->shared->u.atomic.u.f.mpos = 0;					      \
-    dt->shared->u.atomic.u.f.msize = 23;				      \
-    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;			      \
-    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;			      \
-    dt->shared->version = H5O_DTYPE_VERSION_3;				      \
+#define H5T_INIT_TYPE_FLOATVAX_CORE {                       \
+    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_VAX)                 \
+    dt->shared->u.atomic.u.f.sign = 31;                     \
+    dt->shared->u.atomic.u.f.epos = 23;                     \
+    dt->shared->u.atomic.u.f.esize = 8;                     \
+    dt->shared->u.atomic.u.f.ebias = 0x81;                  \
+    dt->shared->u.atomic.u.f.mpos = 0;                      \
+    dt->shared->u.atomic.u.f.msize = 23;                    \
+    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;       \
+    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;            \
+    dt->shared->version = H5O_DTYPE_VERSION_3;              \
 }
 
 /* Define the code templates for VAX double for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_DOUBLEVAX_CORE {                                        \
-    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_VAX)				      \
-    dt->shared->u.atomic.u.f.sign = 63;					      \
-    dt->shared->u.atomic.u.f.epos = 52;					      \
-    dt->shared->u.atomic.u.f.esize = 11;				      \
-    dt->shared->u.atomic.u.f.ebias = 0x0401;				      \
-    dt->shared->u.atomic.u.f.mpos = 0;					      \
-    dt->shared->u.atomic.u.f.msize = 52;				      \
-    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;			      \
-    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;			      \
-    dt->shared->version = H5O_DTYPE_VERSION_3;				      \
+#define H5T_INIT_TYPE_DOUBLEVAX_CORE {                      \
+    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_VAX)                 \
+    dt->shared->u.atomic.u.f.sign = 63;                     \
+    dt->shared->u.atomic.u.f.epos = 52;                     \
+    dt->shared->u.atomic.u.f.esize = 11;                    \
+    dt->shared->u.atomic.u.f.ebias = 0x0401;                \
+    dt->shared->u.atomic.u.f.mpos = 0;                      \
+    dt->shared->u.atomic.u.f.msize = 52;                    \
+    dt->shared->u.atomic.u.f.norm = H5T_NORM_IMPLIED;       \
+    dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;            \
+    dt->shared->version = H5O_DTYPE_VERSION_3;              \
 }
 
 /* Define the code templates for standard signed integers for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_SINT_COMMON(ENDIANNESS) {				      \
-    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)				      \
-    dt->shared->u.atomic.u.i.sign = H5T_SGN_2;				      \
+#define H5T_INIT_TYPE_SINT_COMMON(ENDIANNESS) {             \
+    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)                    \
+    dt->shared->u.atomic.u.i.sign = H5T_SGN_2;              \
 }
 
-#define H5T_INIT_TYPE_SINTLE_CORE {					      \
-    H5T_INIT_TYPE_SINT_COMMON(H5T_ORDER_LE)				      \
+#define H5T_INIT_TYPE_SINTLE_CORE {                         \
+    H5T_INIT_TYPE_SINT_COMMON(H5T_ORDER_LE)                 \
 }
 
-#define H5T_INIT_TYPE_SINTBE_CORE {					      \
-    H5T_INIT_TYPE_SINT_COMMON(H5T_ORDER_BE)				      \
+#define H5T_INIT_TYPE_SINTBE_CORE {                         \
+    H5T_INIT_TYPE_SINT_COMMON(H5T_ORDER_BE)                 \
 }
 
 /* Define the code templates for standard unsigned integers for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_UINT_COMMON(ENDIANNESS) {				      \
-    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)				      \
-    dt->shared->u.atomic.u.i.sign = H5T_SGN_NONE;				      \
+#define H5T_INIT_TYPE_UINT_COMMON(ENDIANNESS) {             \
+    H5T_INIT_TYPE_NUM_COMMON(ENDIANNESS)                    \
+    dt->shared->u.atomic.u.i.sign = H5T_SGN_NONE;           \
 }
 
-#define H5T_INIT_TYPE_UINTLE_CORE {					      \
-    H5T_INIT_TYPE_UINT_COMMON(H5T_ORDER_LE)				      \
+#define H5T_INIT_TYPE_UINTLE_CORE {                         \
+    H5T_INIT_TYPE_UINT_COMMON(H5T_ORDER_LE)                 \
 }
 
-#define H5T_INIT_TYPE_UINTBE_CORE {					      \
-    H5T_INIT_TYPE_UINT_COMMON(H5T_ORDER_BE)				      \
+#define H5T_INIT_TYPE_UINTBE_CORE {                         \
+    H5T_INIT_TYPE_UINT_COMMON(H5T_ORDER_BE)                 \
 }
 
 /* Define a macro for common code for all newly allocate datatypes */
-#define H5T_INIT_TYPE_ALLOC_COMMON(TYPE) {				      \
-    dt->sh_loc.type = H5O_SHARE_TYPE_UNSHARED;				      \
-    dt->shared->type = TYPE;						      \
+#define H5T_INIT_TYPE_ALLOC_COMMON(TYPE) {                  \
+    dt->sh_loc.type = H5O_SHARE_TYPE_UNSHARED;              \
+    dt->shared->type = TYPE;                                \
 }
 
 /* Define the code templates for opaque for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_OPAQ_CORE {					      \
-    H5T_INIT_TYPE_ALLOC_COMMON(H5T_OPAQUE)				      \
-    dt->shared->u.opaque.tag = H5MM_xstrdup("");			      \
+#define H5T_INIT_TYPE_OPAQ_CORE {                           \
+    H5T_INIT_TYPE_ALLOC_COMMON(H5T_OPAQUE)                  \
+    dt->shared->u.opaque.tag = H5MM_xstrdup("");            \
 }
 
 /* Define the code templates for strings for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_STRING_COMMON {					      \
-    H5T_INIT_TYPE_ALLOC_COMMON(H5T_STRING)				      \
-    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_NONE)				      \
-    dt->shared->u.atomic.u.s.cset = H5F_DEFAULT_CSET;			      \
+#define H5T_INIT_TYPE_STRING_COMMON {                       \
+    H5T_INIT_TYPE_ALLOC_COMMON(H5T_STRING)                  \
+    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_NONE)                \
+    dt->shared->u.atomic.u.s.cset = H5F_DEFAULT_CSET;       \
 }
 
-#define H5T_INIT_TYPE_CSTRING_CORE {					      \
-    H5T_INIT_TYPE_STRING_COMMON						      \
-    dt->shared->u.atomic.u.s.pad = H5T_STR_NULLTERM;			      \
+#define H5T_INIT_TYPE_CSTRING_CORE {                        \
+    H5T_INIT_TYPE_STRING_COMMON                             \
+    dt->shared->u.atomic.u.s.pad = H5T_STR_NULLTERM;        \
 }
 
-#define H5T_INIT_TYPE_FORSTRING_CORE {					      \
-    H5T_INIT_TYPE_STRING_COMMON						      \
-    dt->shared->u.atomic.u.s.pad = H5T_STR_SPACEPAD;			      \
+#define H5T_INIT_TYPE_FORSTRING_CORE {                      \
+    H5T_INIT_TYPE_STRING_COMMON                             \
+    dt->shared->u.atomic.u.s.pad = H5T_STR_SPACEPAD;        \
 }
 
 /* Define the code templates for references for the "GUTS" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_REF_COMMON {					      \
-    H5T_INIT_TYPE_ALLOC_COMMON(H5T_REFERENCE)				      \
-    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_NONE)				      \
+#define H5T_INIT_TYPE_REF_COMMON {                          \
+    H5T_INIT_TYPE_ALLOC_COMMON(H5T_REFERENCE)               \
+    H5T_INIT_TYPE_NUM_COMMON(H5T_ORDER_NONE)                \
 }
 
-#define H5T_INIT_TYPE_OBJREF_CORE {					      \
-    H5T_INIT_TYPE_REF_COMMON						      \
-    dt->shared->force_conv = TRUE;					      \
-    dt->shared->u.atomic.u.r.rtype = H5R_OBJECT;			      \
-    dt->shared->u.atomic.u.r.loc = H5T_LOC_MEMORY;			      \
+#define H5T_INIT_TYPE_OBJREF_CORE {                         \
+    H5T_INIT_TYPE_REF_COMMON                                \
+    dt->shared->force_conv = TRUE;                          \
+    dt->shared->u.atomic.u.r.rtype = H5R_OBJECT;            \
+    dt->shared->u.atomic.u.r.loc = H5T_LOC_MEMORY;          \
 }
 
-#define H5T_INIT_TYPE_REGREF_CORE {					      \
-    H5T_INIT_TYPE_REF_COMMON						      \
-    dt->shared->u.atomic.u.r.rtype = H5R_DATASET_REGION;		      \
+#define H5T_INIT_TYPE_REGREF_CORE {                         \
+    H5T_INIT_TYPE_REF_COMMON                                \
+    dt->shared->u.atomic.u.r.rtype = H5R_DATASET_REGION;    \
 }
 
 /* Define the code templates for the "SIZE_TMPL" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_SET_SIZE(SIZE) {					      \
-    dt->shared->size = SIZE;						      \
-    dt->shared->u.atomic.prec = 8 * SIZE;				      \
+#define H5T_INIT_TYPE_SET_SIZE(SIZE) {                      \
+    dt->shared->size = SIZE;                                \
+    dt->shared->u.atomic.prec = 8 * SIZE;                   \
 }
 
-#define H5T_INIT_TYPE_NOSET_SIZE(SIZE) {				      \
+#define H5T_INIT_TYPE_NOSET_SIZE(SIZE) {                    \
 }
 
 /* Define the code templates for the "CRT_TMPL" in the H5T_INIT_TYPE macro */
-#define H5T_INIT_TYPE_COPY_CREATE(BASE) {				      \
-    /* Base off of existing datatype */					      \
-    if(NULL == (dt = H5T_copy(BASE, H5T_COPY_TRANSIENT)))		      \
+#define H5T_INIT_TYPE_COPY_CREATE(BASE) {                   \
+    /* Base off of existing datatype */                     \
+    if(NULL == (dt = H5T_copy(BASE, H5T_COPY_TRANSIENT)))   \
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCOPY, FAIL, "duplicating base type failed") \
 }
 
-#define H5T_INIT_TYPE_ALLOC_CREATE(BASE) {				      \
-    /* Allocate new datatype info */					      \
-    if(NULL == (dt = H5T__alloc()))				              \
+#define H5T_INIT_TYPE_ALLOC_CREATE(BASE) {                  \
+    /* Allocate new datatype info */                        \
+    if(NULL == (dt = H5T__alloc()))                         \
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "memory allocation failed") \
 }
 
 
-#define H5T_INIT_TYPE(GUTS,GLOBAL,CRT_TMPL,BASE,SIZE_TMPL,SIZE) {	      \
-    /* Get new datatype struct */					      \
-    H5_GLUE3(H5T_INIT_TYPE_,CRT_TMPL,_CREATE)(BASE)			      \
-									      \
-    /* Adjust information for all types */				      \
-    dt->shared->state = H5T_STATE_IMMUTABLE;				      \
-    H5_GLUE3(H5T_INIT_TYPE_,SIZE_TMPL,_SIZE)(SIZE)			      \
-									      \
-    /* Adjust information for this type */				      \
-    H5_GLUE3(H5T_INIT_TYPE_, GUTS, _CORE)				      \
-									      \
-    /* Atomize result */						      \
-    if((GLOBAL = H5I_register(H5I_DATATYPE, dt, FALSE)) < 0)			      \
+#define H5T_INIT_TYPE(GUTS,GLOBAL,CRT_TMPL,BASE,SIZE_TMPL,SIZE) { \
+    /* Get new datatype struct */                           \
+    H5_GLUE3(H5T_INIT_TYPE_,CRT_TMPL,_CREATE)(BASE)         \
+                                                            \
+    /* Adjust information for all types */                  \
+    dt->shared->state = H5T_STATE_IMMUTABLE;                \
+    H5_GLUE3(H5T_INIT_TYPE_,SIZE_TMPL,_SIZE)(SIZE)          \
+                                                            \
+    /* Adjust information for this type */                  \
+    H5_GLUE3(H5T_INIT_TYPE_, GUTS, _CORE)                   \
+                                                            \
+    /* Atomize result */                                    \
+    if((GLOBAL = H5I_register(H5I_DATATYPE, dt, FALSE)) < 0)  \
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register datatype atom") \
 }
 
@@ -280,12 +292,17 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static herr_t H5T_unregister(H5T_pers_t pers, const char *name, H5T_t *src,
-                H5T_t *dst, H5T_conv_t func, hid_t dxpl_id);
-static herr_t H5T_register(H5T_pers_t pers, const char *name, H5T_t *src,
-        H5T_t *dst, H5T_conv_t func, hid_t dxpl_id, hbool_t api_call);
-static htri_t H5T_compiler_conv(H5T_t *src, H5T_t *dst);
-static herr_t H5T_set_size(H5T_t *dt, size_t size);
+static herr_t H5T__register_int(H5T_pers_t pers, const char *name, H5T_t *src,
+    H5T_t *dst, H5T_lib_conv_t func);
+static herr_t H5T__register(H5T_pers_t pers, const char *name, H5T_t *src,
+    H5T_t *dst, H5T_conv_func_t *conv);
+static herr_t H5T__unregister(H5T_pers_t pers, const char *name, H5T_t *src,
+    H5T_t *dst, H5T_conv_t func);
+static htri_t H5T__compiler_conv(H5T_t *src, H5T_t *dst);
+static herr_t H5T__set_size(H5T_t *dt, size_t size);
+static herr_t H5T__close_cb(H5T_t *dt);
+static H5T_path_t *H5T__path_find_real(const H5T_t *src, const H5T_t *dst,
+    const char *name, H5T_conv_func_t *conv);
 
 
 /*****************************/
@@ -310,103 +327,103 @@ hbool_t H5_PKG_INIT_VAR = FALSE;
  * If more of these are added, the new ones must be added to the list of
  * types to reset in H5T_term_package().
  */
-hid_t H5T_IEEE_F32BE_g			= FAIL;
-hid_t H5T_IEEE_F32LE_g			= FAIL;
-hid_t H5T_IEEE_F64BE_g			= FAIL;
-hid_t H5T_IEEE_F64LE_g			= FAIL;
-
-hid_t H5T_VAX_F32_g			= FAIL;
-hid_t H5T_VAX_F64_g			= FAIL;
-
-hid_t H5T_STD_I8BE_g			= FAIL;
-hid_t H5T_STD_I8LE_g			= FAIL;
-hid_t H5T_STD_I16BE_g			= FAIL;
-hid_t H5T_STD_I16LE_g			= FAIL;
-hid_t H5T_STD_I32BE_g			= FAIL;
-hid_t H5T_STD_I32LE_g			= FAIL;
-hid_t H5T_STD_I64BE_g			= FAIL;
-hid_t H5T_STD_I64LE_g			= FAIL;
-hid_t H5T_STD_U8BE_g			= FAIL;
-hid_t H5T_STD_U8LE_g			= FAIL;
-hid_t H5T_STD_U16BE_g			= FAIL;
-hid_t H5T_STD_U16LE_g			= FAIL;
-hid_t H5T_STD_U32BE_g			= FAIL;
-hid_t H5T_STD_U32LE_g			= FAIL;
-hid_t H5T_STD_U64BE_g			= FAIL;
-hid_t H5T_STD_U64LE_g			= FAIL;
-hid_t H5T_STD_B8BE_g			= FAIL;
-hid_t H5T_STD_B8LE_g			= FAIL;
-hid_t H5T_STD_B16BE_g			= FAIL;
-hid_t H5T_STD_B16LE_g			= FAIL;
-hid_t H5T_STD_B32BE_g			= FAIL;
-hid_t H5T_STD_B32LE_g			= FAIL;
-hid_t H5T_STD_B64BE_g			= FAIL;
-hid_t H5T_STD_B64LE_g 			= FAIL;
-hid_t H5T_STD_REF_OBJ_g 		= FAIL;
-hid_t H5T_STD_REF_DSETREG_g 		= FAIL;
-
-hid_t H5T_UNIX_D32BE_g			= FAIL;
-hid_t H5T_UNIX_D32LE_g			= FAIL;
-hid_t H5T_UNIX_D64BE_g			= FAIL;
-hid_t H5T_UNIX_D64LE_g 			= FAIL;
-
-hid_t H5T_C_S1_g			= FAIL;
-
-hid_t H5T_FORTRAN_S1_g			= FAIL;
-
-hid_t H5T_NATIVE_SCHAR_g		= FAIL;
-hid_t H5T_NATIVE_UCHAR_g		= FAIL;
-hid_t H5T_NATIVE_SHORT_g		= FAIL;
-hid_t H5T_NATIVE_USHORT_g		= FAIL;
-hid_t H5T_NATIVE_INT_g			= FAIL;
-hid_t H5T_NATIVE_UINT_g			= FAIL;
-hid_t H5T_NATIVE_LONG_g			= FAIL;
-hid_t H5T_NATIVE_ULONG_g		= FAIL;
-hid_t H5T_NATIVE_LLONG_g		= FAIL;
-hid_t H5T_NATIVE_ULLONG_g		= FAIL;
-hid_t H5T_NATIVE_FLOAT_g		= FAIL;
-hid_t H5T_NATIVE_DOUBLE_g		= FAIL;
+hid_t H5T_IEEE_F32BE_g          = FAIL;
+hid_t H5T_IEEE_F32LE_g          = FAIL;
+hid_t H5T_IEEE_F64BE_g          = FAIL;
+hid_t H5T_IEEE_F64LE_g          = FAIL;
+
+hid_t H5T_VAX_F32_g             = FAIL;
+hid_t H5T_VAX_F64_g             = FAIL;
+
+hid_t H5T_STD_I8BE_g            = FAIL;
+hid_t H5T_STD_I8LE_g            = FAIL;
+hid_t H5T_STD_I16BE_g           = FAIL;
+hid_t H5T_STD_I16LE_g           = FAIL;
+hid_t H5T_STD_I32BE_g           = FAIL;
+hid_t H5T_STD_I32LE_g           = FAIL;
+hid_t H5T_STD_I64BE_g           = FAIL;
+hid_t H5T_STD_I64LE_g           = FAIL;
+hid_t H5T_STD_U8BE_g            = FAIL;
+hid_t H5T_STD_U8LE_g            = FAIL;
+hid_t H5T_STD_U16BE_g           = FAIL;
+hid_t H5T_STD_U16LE_g           = FAIL;
+hid_t H5T_STD_U32BE_g           = FAIL;
+hid_t H5T_STD_U32LE_g           = FAIL;
+hid_t H5T_STD_U64BE_g           = FAIL;
+hid_t H5T_STD_U64LE_g           = FAIL;
+hid_t H5T_STD_B8BE_g            = FAIL;
+hid_t H5T_STD_B8LE_g            = FAIL;
+hid_t H5T_STD_B16BE_g           = FAIL;
+hid_t H5T_STD_B16LE_g           = FAIL;
+hid_t H5T_STD_B32BE_g           = FAIL;
+hid_t H5T_STD_B32LE_g           = FAIL;
+hid_t H5T_STD_B64BE_g           = FAIL;
+hid_t H5T_STD_B64LE_g           = FAIL;
+hid_t H5T_STD_REF_OBJ_g         = FAIL;
+hid_t H5T_STD_REF_DSETREG_g     = FAIL;
+
+hid_t H5T_UNIX_D32BE_g          = FAIL;
+hid_t H5T_UNIX_D32LE_g          = FAIL;
+hid_t H5T_UNIX_D64BE_g          = FAIL;
+hid_t H5T_UNIX_D64LE_g          = FAIL;
+
+hid_t H5T_C_S1_g                = FAIL;
+
+hid_t H5T_FORTRAN_S1_g          = FAIL;
+
+hid_t H5T_NATIVE_SCHAR_g        = FAIL;
+hid_t H5T_NATIVE_UCHAR_g        = FAIL;
+hid_t H5T_NATIVE_SHORT_g        = FAIL;
+hid_t H5T_NATIVE_USHORT_g       = FAIL;
+hid_t H5T_NATIVE_INT_g          = FAIL;
+hid_t H5T_NATIVE_UINT_g         = FAIL;
+hid_t H5T_NATIVE_LONG_g         = FAIL;
+hid_t H5T_NATIVE_ULONG_g        = FAIL;
+hid_t H5T_NATIVE_LLONG_g        = FAIL;
+hid_t H5T_NATIVE_ULLONG_g       = FAIL;
+hid_t H5T_NATIVE_FLOAT_g        = FAIL;
+hid_t H5T_NATIVE_DOUBLE_g       = FAIL;
 #if H5_SIZEOF_LONG_DOUBLE !=0
-hid_t H5T_NATIVE_LDOUBLE_g		= FAIL;
+hid_t H5T_NATIVE_LDOUBLE_g      = FAIL;
 #endif
-hid_t H5T_NATIVE_B8_g			= FAIL;
-hid_t H5T_NATIVE_B16_g			= FAIL;
-hid_t H5T_NATIVE_B32_g			= FAIL;
-hid_t H5T_NATIVE_B64_g			= FAIL;
-hid_t H5T_NATIVE_OPAQUE_g		= FAIL;
-hid_t H5T_NATIVE_HADDR_g		= FAIL;
-hid_t H5T_NATIVE_HSIZE_g		= FAIL;
-hid_t H5T_NATIVE_HSSIZE_g		= FAIL;
-hid_t H5T_NATIVE_HERR_g			= FAIL;
-hid_t H5T_NATIVE_HBOOL_g		= FAIL;
-
-hid_t H5T_NATIVE_INT8_g			= FAIL;
-hid_t H5T_NATIVE_UINT8_g		= FAIL;
-hid_t H5T_NATIVE_INT_LEAST8_g		= FAIL;
-hid_t H5T_NATIVE_UINT_LEAST8_g		= FAIL;
-hid_t H5T_NATIVE_INT_FAST8_g		= FAIL;
-hid_t H5T_NATIVE_UINT_FAST8_g		= FAIL;
-
-hid_t H5T_NATIVE_INT16_g		= FAIL;
-hid_t H5T_NATIVE_UINT16_g		= FAIL;
-hid_t H5T_NATIVE_INT_LEAST16_g		= FAIL;
-hid_t H5T_NATIVE_UINT_LEAST16_g		= FAIL;
-hid_t H5T_NATIVE_INT_FAST16_g		= FAIL;
-hid_t H5T_NATIVE_UINT_FAST16_g		= FAIL;
-
-hid_t H5T_NATIVE_INT32_g		= FAIL;
-hid_t H5T_NATIVE_UINT32_g		= FAIL;
-hid_t H5T_NATIVE_INT_LEAST32_g		= FAIL;
-hid_t H5T_NATIVE_UINT_LEAST32_g		= FAIL;
-hid_t H5T_NATIVE_INT_FAST32_g		= FAIL;
-hid_t H5T_NATIVE_UINT_FAST32_g		= FAIL;
-
-hid_t H5T_NATIVE_INT64_g		= FAIL;
-hid_t H5T_NATIVE_UINT64_g		= FAIL;
-hid_t H5T_NATIVE_INT_LEAST64_g		= FAIL;
-hid_t H5T_NATIVE_UINT_LEAST64_g		= FAIL;
-hid_t H5T_NATIVE_INT_FAST64_g		= FAIL;
-hid_t H5T_NATIVE_UINT_FAST64_g		= FAIL;
+hid_t H5T_NATIVE_B8_g           = FAIL;
+hid_t H5T_NATIVE_B16_g          = FAIL;
+hid_t H5T_NATIVE_B32_g          = FAIL;
+hid_t H5T_NATIVE_B64_g          = FAIL;
+hid_t H5T_NATIVE_OPAQUE_g       = FAIL;
+hid_t H5T_NATIVE_HADDR_g        = FAIL;
+hid_t H5T_NATIVE_HSIZE_g        = FAIL;
+hid_t H5T_NATIVE_HSSIZE_g       = FAIL;
+hid_t H5T_NATIVE_HERR_g         = FAIL;
+hid_t H5T_NATIVE_HBOOL_g        = FAIL;
+
+hid_t H5T_NATIVE_INT8_g         = FAIL;
+hid_t H5T_NATIVE_UINT8_g        = FAIL;
+hid_t H5T_NATIVE_INT_LEAST8_g   = FAIL;
+hid_t H5T_NATIVE_UINT_LEAST8_g  = FAIL;
+hid_t H5T_NATIVE_INT_FAST8_g    = FAIL;
+hid_t H5T_NATIVE_UINT_FAST8_g   = FAIL;
+
+hid_t H5T_NATIVE_INT16_g        = FAIL;
+hid_t H5T_NATIVE_UINT16_g       = FAIL;
+hid_t H5T_NATIVE_INT_LEAST16_g  = FAIL;
+hid_t H5T_NATIVE_UINT_LEAST16_g = FAIL;
+hid_t H5T_NATIVE_INT_FAST16_g   = FAIL;
+hid_t H5T_NATIVE_UINT_FAST16_g  = FAIL;
+
+hid_t H5T_NATIVE_INT32_g        = FAIL;
+hid_t H5T_NATIVE_UINT32_g       = FAIL;
+hid_t H5T_NATIVE_INT_LEAST32_g  = FAIL;
+hid_t H5T_NATIVE_UINT_LEAST32_g = FAIL;
+hid_t H5T_NATIVE_INT_FAST32_g   = FAIL;
+hid_t H5T_NATIVE_UINT_FAST32_g  = FAIL;
+
+hid_t H5T_NATIVE_INT64_g        = FAIL;
+hid_t H5T_NATIVE_UINT64_g       = FAIL;
+hid_t H5T_NATIVE_INT_LEAST64_g  = FAIL;
+hid_t H5T_NATIVE_UINT_LEAST64_g = FAIL;
+hid_t H5T_NATIVE_INT_FAST64_g   = FAIL;
+hid_t H5T_NATIVE_UINT_FAST64_g  = FAIL;
 
 /*
  * Alignment constraints for native types. These are initialized at run time
@@ -414,45 +431,45 @@ hid_t H5T_NATIVE_UINT_FAST64_g		= FAIL;
  * datatype or C structures, which are different from the alignments for memory
  * address below this group of variables.
  */
-size_t H5T_NATIVE_SCHAR_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_UCHAR_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_SHORT_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_USHORT_COMP_ALIGN_g   	= 0;
-size_t H5T_NATIVE_INT_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_UINT_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_LONG_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_ULONG_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_LLONG_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_ULLONG_COMP_ALIGN_g	        = 0;
-size_t H5T_NATIVE_FLOAT_COMP_ALIGN_g		= 0;
-size_t H5T_NATIVE_DOUBLE_COMP_ALIGN_g	        = 0;
+size_t H5T_NATIVE_SCHAR_COMP_ALIGN_g        = 0;
+size_t H5T_NATIVE_UCHAR_COMP_ALIGN_g        = 0;
+size_t H5T_NATIVE_SHORT_COMP_ALIGN_g        = 0;
+size_t H5T_NATIVE_USHORT_COMP_ALIGN_g       = 0;
+size_t H5T_NATIVE_INT_COMP_ALIGN_g          = 0;
+size_t H5T_NATIVE_UINT_COMP_ALIGN_g         = 0;
+size_t H5T_NATIVE_LONG_COMP_ALIGN_g         = 0;
+size_t H5T_NATIVE_ULONG_COMP_ALIGN_g        = 0;
+size_t H5T_NATIVE_LLONG_COMP_ALIGN_g        = 0;
+size_t H5T_NATIVE_ULLONG_COMP_ALIGN_g       = 0;
+size_t H5T_NATIVE_FLOAT_COMP_ALIGN_g        = 0;
+size_t H5T_NATIVE_DOUBLE_COMP_ALIGN_g       = 0;
 #if H5_SIZEOF_LONG_DOUBLE !=0
-size_t H5T_NATIVE_LDOUBLE_COMP_ALIGN_g	        = 0;
+size_t H5T_NATIVE_LDOUBLE_COMP_ALIGN_g      = 0;
 #endif
 
-size_t H5T_POINTER_COMP_ALIGN_g	                = 0;
-size_t H5T_HVL_COMP_ALIGN_g	                = 0;
-size_t H5T_HOBJREF_COMP_ALIGN_g	                = 0;
-size_t H5T_HDSETREGREF_COMP_ALIGN_g	        = 0;
+size_t H5T_POINTER_COMP_ALIGN_g             = 0;
+size_t H5T_HVL_COMP_ALIGN_g                 = 0;
+size_t H5T_HOBJREF_COMP_ALIGN_g             = 0;
+size_t H5T_HDSETREGREF_COMP_ALIGN_g         = 0;
 
 /*
  * Alignment constraints for native types. These are initialized at run time
  * in H5Tinit.c
  */
-size_t H5T_NATIVE_SCHAR_ALIGN_g		= 0;
-size_t H5T_NATIVE_UCHAR_ALIGN_g		= 0;
-size_t H5T_NATIVE_SHORT_ALIGN_g		= 0;
-size_t H5T_NATIVE_USHORT_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_ALIGN_g		= 0;
-size_t H5T_NATIVE_UINT_ALIGN_g		= 0;
-size_t H5T_NATIVE_LONG_ALIGN_g		= 0;
-size_t H5T_NATIVE_ULONG_ALIGN_g		= 0;
-size_t H5T_NATIVE_LLONG_ALIGN_g		= 0;
-size_t H5T_NATIVE_ULLONG_ALIGN_g	= 0;
-size_t H5T_NATIVE_FLOAT_ALIGN_g		= 0;
-size_t H5T_NATIVE_DOUBLE_ALIGN_g	= 0;
+size_t H5T_NATIVE_SCHAR_ALIGN_g             = 0;
+size_t H5T_NATIVE_UCHAR_ALIGN_g             = 0;
+size_t H5T_NATIVE_SHORT_ALIGN_g             = 0;
+size_t H5T_NATIVE_USHORT_ALIGN_g            = 0;
+size_t H5T_NATIVE_INT_ALIGN_g               = 0;
+size_t H5T_NATIVE_UINT_ALIGN_g              = 0;
+size_t H5T_NATIVE_LONG_ALIGN_g              = 0;
+size_t H5T_NATIVE_ULONG_ALIGN_g             = 0;
+size_t H5T_NATIVE_LLONG_ALIGN_g             = 0;
+size_t H5T_NATIVE_ULLONG_ALIGN_g            = 0;
+size_t H5T_NATIVE_FLOAT_ALIGN_g             = 0;
+size_t H5T_NATIVE_DOUBLE_ALIGN_g            = 0;
 #if H5_SIZEOF_LONG_DOUBLE !=0
-size_t H5T_NATIVE_LDOUBLE_ALIGN_g	= 0;
+size_t H5T_NATIVE_LDOUBLE_ALIGN_g           = 0;
 #endif
 
 /*
@@ -460,45 +477,51 @@ size_t H5T_NATIVE_LDOUBLE_ALIGN_g	= 0;
  * H5Tinit.c if the types are provided by the system. Otherwise we set their
  * values to 0 here (no alignment calculated).
  */
-size_t H5T_NATIVE_INT8_ALIGN_g		= 0;
-size_t H5T_NATIVE_UINT8_ALIGN_g		= 0;
-size_t H5T_NATIVE_INT_LEAST8_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_LEAST8_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_FAST8_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_FAST8_ALIGN_g	= 0;
-
-size_t H5T_NATIVE_INT16_ALIGN_g		= 0;
-size_t H5T_NATIVE_UINT16_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_LEAST16_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_LEAST16_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_FAST16_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_FAST16_ALIGN_g	= 0;
-
-size_t H5T_NATIVE_INT32_ALIGN_g		= 0;
-size_t H5T_NATIVE_UINT32_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_LEAST32_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_LEAST32_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_FAST32_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_FAST32_ALIGN_g	= 0;
-
-size_t H5T_NATIVE_INT64_ALIGN_g		= 0;
-size_t H5T_NATIVE_UINT64_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_LEAST64_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_LEAST64_ALIGN_g	= 0;
-size_t H5T_NATIVE_INT_FAST64_ALIGN_g	= 0;
-size_t H5T_NATIVE_UINT_FAST64_ALIGN_g	= 0;
+size_t H5T_NATIVE_INT8_ALIGN_g              = 0;
+size_t H5T_NATIVE_UINT8_ALIGN_g             = 0;
+size_t H5T_NATIVE_INT_LEAST8_ALIGN_g        = 0;
+size_t H5T_NATIVE_UINT_LEAST8_ALIGN_g       = 0;
+size_t H5T_NATIVE_INT_FAST8_ALIGN_g         = 0;
+size_t H5T_NATIVE_UINT_FAST8_ALIGN_g        = 0;
+
+size_t H5T_NATIVE_INT16_ALIGN_g             = 0;
+size_t H5T_NATIVE_UINT16_ALIGN_g            = 0;
+size_t H5T_NATIVE_INT_LEAST16_ALIGN_g       = 0;
+size_t H5T_NATIVE_UINT_LEAST16_ALIGN_g      = 0;
+size_t H5T_NATIVE_INT_FAST16_ALIGN_g        = 0;
+size_t H5T_NATIVE_UINT_FAST16_ALIGN_g       = 0;
+
+size_t H5T_NATIVE_INT32_ALIGN_g             = 0;
+size_t H5T_NATIVE_UINT32_ALIGN_g            = 0;
+size_t H5T_NATIVE_INT_LEAST32_ALIGN_g       = 0;
+size_t H5T_NATIVE_UINT_LEAST32_ALIGN_g      = 0;
+size_t H5T_NATIVE_INT_FAST32_ALIGN_g        = 0;
+size_t H5T_NATIVE_UINT_FAST32_ALIGN_g       = 0;
+
+size_t H5T_NATIVE_INT64_ALIGN_g             = 0;
+size_t H5T_NATIVE_UINT64_ALIGN_g            = 0;
+size_t H5T_NATIVE_INT_LEAST64_ALIGN_g       = 0;
+size_t H5T_NATIVE_UINT_LEAST64_ALIGN_g      = 0;
+size_t H5T_NATIVE_INT_FAST64_ALIGN_g        = 0;
+size_t H5T_NATIVE_UINT_FAST64_ALIGN_g       = 0;
 
 /* Useful floating-point values for conversion routines */
 /* (+/- Inf for all floating-point types) */
-float H5T_NATIVE_FLOAT_POS_INF_g        = 0.0f;
-float H5T_NATIVE_FLOAT_NEG_INF_g        = 0.0f;
-double H5T_NATIVE_DOUBLE_POS_INF_g      = (double)0.0f;
-double H5T_NATIVE_DOUBLE_NEG_INF_g      = (double)0.0f;
+float H5T_NATIVE_FLOAT_POS_INF_g            = 0.0f;
+float H5T_NATIVE_FLOAT_NEG_INF_g            = 0.0f;
+double H5T_NATIVE_DOUBLE_POS_INF_g          = (double)0.0f;
+double H5T_NATIVE_DOUBLE_NEG_INF_g          = (double)0.0f;
 
 /* Declare the free list for H5T_t's and H5T_shared_t's */
 H5FL_DEFINE(H5T_t);
 H5FL_DEFINE(H5T_shared_t);
 
+/* Format version bounds for datatype */
+const unsigned H5O_dtype_ver_bounds[] = {
+    H5O_DTYPE_VERSION_1,        /* H5F_LIBVER_EARLIEST */
+    H5O_DTYPE_VERSION_3,        /* H5F_LIBVER_V18 */
+    H5O_DTYPE_VERSION_LATEST    /* H5F_LIBVER_LATEST */
+};
 
 /*******************/
 /* Local Variables */
@@ -509,12 +532,12 @@ H5FL_DEFINE(H5T_shared_t);
  * which is used as the key by which the `entries' array is sorted.
  */
 static struct {
-    int	npaths;		/*number of paths defined		*/
-    size_t	apaths;		/*number of paths allocated		*/
-    H5T_path_t	**path;		/*sorted array of path pointers		*/
-    int	nsoft;		/*number of soft conversions defined	*/
-    size_t	asoft;		/*number of soft conversions allocated	*/
-    H5T_soft_t	*soft;		/*unsorted array of soft conversions	*/
+    int            npaths;        /*number of paths defined               */
+    size_t         apaths;        /*number of paths allocated             */
+    H5T_path_t   **path;          /*sorted array of path pointers         */
+    int            nsoft;         /*number of soft conversions defined    */
+    size_t         asoft;         /*number of soft conversions allocated  */
+    H5T_soft_t    *soft;          /*unsorted array of soft conversions    */
 } H5T_g;
 
 /* Declare the free list for H5T_path_t's */
@@ -522,26 +545,27 @@ H5FL_DEFINE_STATIC(H5T_path_t);
 
 /* Datatype ID class */
 static const H5I_class_t H5I_DATATYPE_CLS[1] = {{
-    H5I_DATATYPE,		/* ID class value */
-    0,				/* Class flags */
-    8,				/* # of reserved IDs for class */
-    (H5I_free_t)H5T_close	/* Callback routine for closing objects of this class */
+    H5I_DATATYPE,               /* ID class value */
+    0,                          /* Class flags    */
+    8,                          /* # of reserved IDs for class */
+    (H5I_free_t)H5T__close_cb   /* Callback routine for closing objects of this class */
 }};
 
+
 /* Flag indicating "top" of interface has been initialized */
 static hbool_t H5T_top_package_initialize_s = FALSE;
 
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_init
+ * Function:    H5T_init
  *
- * Purpose:	Initialize the interface from some other package.
+ * Purpose:    Initialize the interface from some other package.
  *
- * Return:	Success:	non-negative
- *		Failure:	negative
+ * Return:    Success:    non-negative
+ *            Failure:    negative
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, December 16, 1998
  *
  *-------------------------------------------------------------------------
@@ -560,15 +584,15 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__init_inf
+ * Function:    H5T__init_inf
  *
- * Purpose:	Initialize the +/- Infinity floating-poing values for type
+ * Purpose:    Initialize the +/- Infinity floating-poing values for type
  *              conversion.
  *
- * Return:	Success:	non-negative
- *		Failure:	negative
+ * Return:    Success:    non-negative
+ *            Failure:    negative
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Saturday, November 22, 2003
  *
  *-------------------------------------------------------------------------
@@ -576,12 +600,12 @@ done:
 static herr_t
 H5T__init_inf(void)
 {
-    H5T_t	*dst_p;		/* Datatype type operate on */
-    H5T_atomic_t *dst;		/* Datatype's atomic info */
-    uint8_t	*d;             /* Pointer to value to set */
-    size_t	half_size;	/* Half the type size */
-    size_t      u;              /* Local index value */
-    herr_t ret_value = SUCCEED; /* Return value */
+    H5T_t        *dst_p;        /* Datatype type operate on */
+    H5T_atomic_t *dst;          /* Datatype's atomic info   */
+    uint8_t      *d;            /* Pointer to value to set  */
+    size_t        half_size;    /* Half the type size       */
+    size_t        u;            /* Local index value        */
+    herr_t ret_value = SUCCEED; /* Return value             */
 
     FUNC_ENTER_STATIC
 
@@ -709,26 +733,26 @@ H5T__init_package(void)
     H5T_t       *std_u32be=NULL;        /* Datatype structure for unsigned 32-bit big-endian integer */
     H5T_t       *std_u64le=NULL;        /* Datatype structure for unsigned 64-bit little-endian integer */
     H5T_t       *std_u64be=NULL;        /* Datatype structure for unsigned 64-bit big-endian integer */
-    H5T_t	*dt = NULL;
-    H5T_t	*fixedpt=NULL;          /* Datatype structure for native int */
-    H5T_t	*floatpt=NULL;          /* Datatype structure for native float */
-    H5T_t	*string=NULL;           /* Datatype structure for C string */
-    H5T_t	*bitfield=NULL;         /* Datatype structure for bitfield */
-    H5T_t	*compound=NULL;         /* Datatype structure for compound objects */
-    H5T_t	*enum_type=NULL;        /* Datatype structure for enum objects */
-    H5T_t	*vlen=NULL;             /* Datatype structure for vlen objects */
-    H5T_t	*array=NULL;            /* Datatype structure for array objects */
-    H5T_t	*objref=NULL;           /* Datatype structure for object reference objects */
+    H5T_t       *dt = NULL;
+    H5T_t       *fixedpt=NULL;          /* Datatype structure for native int */
+    H5T_t       *floatpt=NULL;          /* Datatype structure for native float */
+    H5T_t       *string=NULL;           /* Datatype structure for C string */
+    H5T_t       *bitfield=NULL;         /* Datatype structure for bitfield */
+    H5T_t       *compound=NULL;         /* Datatype structure for compound objects */
+    H5T_t       *enum_type=NULL;        /* Datatype structure for enum objects */
+    H5T_t       *vlen=NULL;             /* Datatype structure for vlen objects */
+    H5T_t       *array=NULL;            /* Datatype structure for array objects */
+    H5T_t       *objref=NULL;           /* Datatype structure for object reference objects */
     hsize_t     dim[1]={1};             /* Dimension info for array datatype */
-    herr_t	status;
-    unsigned    copied_dtype=1;         /* Flag to indicate whether datatype was copied or allocated (for error cleanup) */
-    herr_t	ret_value = SUCCEED;    /* Return value */
+    herr_t      status;
+    hbool_t     copied_dtype = TRUE;    /* Flag to indicate whether datatype was copied or allocated (for error cleanup) */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
     /* Initialize the atom group for the file IDs */
     if(H5I_register_type(H5I_DATATYPE_CLS) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize interface")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize interface")
 
     /* Make certain there aren't too many classes of datatypes defined */
     /* Only 16 (numbered 0-15) are supported in the current file format */
@@ -739,7 +763,7 @@ H5T__init_package(void)
      * the library configuration by H5detect.
      */
     if(H5T__init_native() < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize interface")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize interface")
 
     /* Get the atomic datatype structures needed by the initialization code below */
     if(NULL == (native_schar = (H5T_t *)H5I_object(H5T_NATIVE_SCHAR_g)))
@@ -898,29 +922,29 @@ H5T__init_package(void)
      */
 
     /* little-endian (order is irrelevant) 8-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B8LE_g, COPY, std_u8le, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDLE, H5T_STD_B8LE_g, COPY, std_u8le, NOSET, -)
     bitfield=dt;    /* Keep type for later */
 
     /* big-endian (order is irrelevant) 8-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B8BE_g, COPY, std_u8be, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDBE, H5T_STD_B8BE_g, COPY, std_u8be, NOSET, -)
 
     /* Little-endian 16-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B16LE_g, COPY, std_u16le, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDLE, H5T_STD_B16LE_g, COPY, std_u16le, NOSET, -)
 
     /* Big-endian 16-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B16BE_g, COPY, std_u16be, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDBE, H5T_STD_B16BE_g, COPY, std_u16be, NOSET, -)
 
     /* Little-endian 32-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B32LE_g, COPY, std_u32le, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDLE, H5T_STD_B32LE_g, COPY, std_u32le, NOSET, -)
 
     /* Big-endian 32-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B32BE_g, COPY, std_u32be, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDBE, H5T_STD_B32BE_g, COPY, std_u32be, NOSET, -)
 
     /* Little-endian 64-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B64LE_g, COPY, std_u64le, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDLE, H5T_STD_B64LE_g, COPY, std_u64le, NOSET, -)
 
     /* Big-endian 64-bit bitfield */
-    H5T_INIT_TYPE(BITFIELD, H5T_STD_B64BE_g, COPY, std_u64be, NOSET, -)
+    H5T_INIT_TYPE(BITFIELDBE, H5T_STD_B64BE_g, COPY, std_u64be, NOSET, -)
 
     /*------------------------------------------------------------
      * The Unix architecture for dates and times.
@@ -984,33 +1008,33 @@ H5T__init_package(void)
     fixedpt = native_int;
     floatpt = native_float;
     if (NULL == (compound = H5T__create(H5T_COMPOUND, (size_t)1)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if (NULL == (enum_type = H5T__create(H5T_ENUM, (size_t)1)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if (NULL == (vlen = H5T__vlen_create(native_int)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if (NULL == (array = H5T__array_create(native_int, 1, dim)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     status = 0;
 
-    status |= H5T_register(H5T_PERS_SOFT, "i_i", fixedpt, fixedpt, H5T__conv_i_i, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "i_f", fixedpt, floatpt, H5T__conv_i_f, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "f_f", floatpt, floatpt, H5T__conv_f_f, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "f_i", floatpt, fixedpt, H5T__conv_f_i, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "s_s", string, string, H5T__conv_s_s, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "b_b", bitfield, bitfield, H5T__conv_b_b, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "ibo", fixedpt, fixedpt, H5T__conv_order, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "ibo(opt)", fixedpt, fixedpt, H5T__conv_order_opt, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "fbo", floatpt, floatpt, H5T__conv_order, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "fbo(opt)", floatpt, floatpt, H5T__conv_order_opt, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "struct(no-opt)", compound, compound, H5T__conv_struct, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "struct(opt)", compound, compound, H5T__conv_struct_opt, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "enum", enum_type, enum_type, H5T__conv_enum, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "enum_i", enum_type, fixedpt, H5T__conv_enum_numeric, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "enum_f", enum_type, floatpt, H5T__conv_enum_numeric, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "vlen", vlen, vlen, H5T__conv_vlen, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "array", array, array, H5T__conv_array, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_SOFT, "objref", objref, objref, H5T__conv_order_opt, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_SOFT, "i_i", fixedpt, fixedpt, H5T__conv_i_i);
+    status |= H5T__register_int(H5T_PERS_SOFT, "i_f", fixedpt, floatpt, H5T__conv_i_f);
+    status |= H5T__register_int(H5T_PERS_SOFT, "f_f", floatpt, floatpt, H5T__conv_f_f);
+    status |= H5T__register_int(H5T_PERS_SOFT, "f_i", floatpt, fixedpt, H5T__conv_f_i);
+    status |= H5T__register_int(H5T_PERS_SOFT, "s_s", string, string, H5T__conv_s_s);
+    status |= H5T__register_int(H5T_PERS_SOFT, "b_b", bitfield, bitfield, H5T__conv_b_b);
+    status |= H5T__register_int(H5T_PERS_SOFT, "ibo", fixedpt, fixedpt, H5T__conv_order);
+    status |= H5T__register_int(H5T_PERS_SOFT, "ibo(opt)", fixedpt, fixedpt, H5T__conv_order_opt);
+    status |= H5T__register_int(H5T_PERS_SOFT, "fbo", floatpt, floatpt, H5T__conv_order);
+    status |= H5T__register_int(H5T_PERS_SOFT, "fbo(opt)", floatpt, floatpt, H5T__conv_order_opt);
+    status |= H5T__register_int(H5T_PERS_SOFT, "struct(no-opt)", compound, compound, H5T__conv_struct);
+    status |= H5T__register_int(H5T_PERS_SOFT, "struct(opt)", compound, compound, H5T__conv_struct_opt);
+    status |= H5T__register_int(H5T_PERS_SOFT, "enum", enum_type, enum_type, H5T__conv_enum);
+    status |= H5T__register_int(H5T_PERS_SOFT, "enum_i", enum_type, fixedpt, H5T__conv_enum_numeric);
+    status |= H5T__register_int(H5T_PERS_SOFT, "enum_f", enum_type, floatpt, H5T__conv_enum_numeric);
+    status |= H5T__register_int(H5T_PERS_SOFT, "vlen", vlen, vlen, H5T__conv_vlen);
+    status |= H5T__register_int(H5T_PERS_SOFT, "array", array, array, H5T__conv_array);
+    status |= H5T__register_int(H5T_PERS_SOFT, "objref", objref, objref, H5T__conv_order_opt);
 
     /*
      * Native conversions should be listed last since we can use hardware to
@@ -1021,221 +1045,221 @@ H5T__init_package(void)
      */
 
     /* floating point */
-    status |= H5T_register(H5T_PERS_HARD, "flt_dbl", native_float, native_double, H5T__conv_float_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_flt", native_double, native_float, H5T__conv_double_float, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_dbl", native_float, native_double, H5T__conv_float_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_flt", native_double, native_float, H5T__conv_double_float);
 #if H5_SIZEOF_LONG_DOUBLE != 0
-    status |= H5T_register(H5T_PERS_HARD, "flt_ldbl", native_float, native_ldouble, H5T__conv_float_ldouble, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_ldbl", native_double, native_ldouble, H5T__conv_double_ldouble, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_flt", native_ldouble, native_float, H5T__conv_ldouble_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_dbl", native_ldouble, native_double, H5T__conv_ldouble_double, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_ldbl", native_float, native_ldouble, H5T__conv_float_ldouble);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_ldbl", native_double, native_ldouble, H5T__conv_double_ldouble);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_flt", native_ldouble, native_float, H5T__conv_ldouble_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_dbl", native_ldouble, native_double, H5T__conv_ldouble_double);
 #endif /* H5_SIZEOF_LONG_DOUBLE != 0 */
 
     /* from long long */
-    status |= H5T_register(H5T_PERS_HARD, "llong_ullong", native_llong, native_ullong, H5T__conv_llong_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_llong", native_ullong, native_llong, H5T__conv_ullong_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_long", native_llong, native_long, H5T__conv_llong_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_ulong", native_llong, native_ulong, H5T__conv_llong_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_long", native_ullong, native_long, H5T__conv_ullong_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_ulong", native_ullong, native_ulong, H5T__conv_ullong_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_short", native_llong, native_short, H5T__conv_llong_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_ushort", native_llong, native_ushort, H5T__conv_llong_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_short", native_ullong, native_short, H5T__conv_ullong_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_ushort", native_ullong, native_ushort, H5T__conv_ullong_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_int", native_llong, native_int, H5T__conv_llong_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_uint", native_llong, native_uint, H5T__conv_llong_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_int", native_ullong, native_int, H5T__conv_ullong_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_uint", native_ullong, native_uint, H5T__conv_ullong_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_schar", native_llong, native_schar, H5T__conv_llong_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_uchar", native_llong, native_uchar, H5T__conv_llong_uchar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_schar", native_ullong, native_schar, H5T__conv_ullong_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_uchar", native_ullong, native_uchar, H5T__conv_ullong_uchar, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_ullong", native_llong, native_ullong, H5T__conv_llong_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_llong", native_ullong, native_llong, H5T__conv_ullong_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_long", native_llong, native_long, H5T__conv_llong_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_ulong", native_llong, native_ulong, H5T__conv_llong_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_long", native_ullong, native_long, H5T__conv_ullong_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_ulong", native_ullong, native_ulong, H5T__conv_ullong_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_short", native_llong, native_short, H5T__conv_llong_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_ushort", native_llong, native_ushort, H5T__conv_llong_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_short", native_ullong, native_short, H5T__conv_ullong_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_ushort", native_ullong, native_ushort, H5T__conv_ullong_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_int", native_llong, native_int, H5T__conv_llong_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_uint", native_llong, native_uint, H5T__conv_llong_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_int", native_ullong, native_int, H5T__conv_ullong_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_uint", native_ullong, native_uint, H5T__conv_ullong_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_schar", native_llong, native_schar, H5T__conv_llong_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_uchar", native_llong, native_uchar, H5T__conv_llong_uchar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_schar", native_ullong, native_schar, H5T__conv_ullong_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_uchar", native_ullong, native_uchar, H5T__conv_ullong_uchar);
 
     /* From long */
-    status |= H5T_register(H5T_PERS_HARD, "long_llong", native_long, native_llong, H5T__conv_long_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_ullong", native_long, native_ullong, H5T__conv_long_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_llong", native_ulong, native_llong, H5T__conv_ulong_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_ullong", native_ulong, native_ullong, H5T__conv_ulong_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_ulong", native_long, native_ulong, H5T__conv_long_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_long", native_ulong, native_long, H5T__conv_ulong_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_short", native_long, native_short, H5T__conv_long_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_ushort", native_long, native_ushort, H5T__conv_long_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_short", native_ulong, native_short, H5T__conv_ulong_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_ushort", native_ulong, native_ushort, H5T__conv_ulong_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_int", native_long, native_int, H5T__conv_long_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_uint", native_long, native_uint, H5T__conv_long_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_int", native_ulong, native_int, H5T__conv_ulong_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_uint", native_ulong, native_uint, H5T__conv_ulong_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_schar", native_long, native_schar, H5T__conv_long_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_uchar", native_long, native_uchar, H5T__conv_long_uchar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_schar", native_ulong, native_schar, H5T__conv_ulong_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_uchar", native_ulong, native_uchar, H5T__conv_ulong_uchar, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_llong", native_long, native_llong, H5T__conv_long_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_ullong", native_long, native_ullong, H5T__conv_long_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_llong", native_ulong, native_llong, H5T__conv_ulong_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_ullong", native_ulong, native_ullong, H5T__conv_ulong_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_ulong", native_long, native_ulong, H5T__conv_long_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_long", native_ulong, native_long, H5T__conv_ulong_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_short", native_long, native_short, H5T__conv_long_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_ushort", native_long, native_ushort, H5T__conv_long_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_short", native_ulong, native_short, H5T__conv_ulong_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_ushort", native_ulong, native_ushort, H5T__conv_ulong_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_int", native_long, native_int, H5T__conv_long_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_uint", native_long, native_uint, H5T__conv_long_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_int", native_ulong, native_int, H5T__conv_ulong_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_uint", native_ulong, native_uint, H5T__conv_ulong_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_schar", native_long, native_schar, H5T__conv_long_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_uchar", native_long, native_uchar, H5T__conv_long_uchar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_schar", native_ulong, native_schar, H5T__conv_ulong_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_uchar", native_ulong, native_uchar, H5T__conv_ulong_uchar);
 
     /* From short */
-    status |= H5T_register(H5T_PERS_HARD, "short_llong", native_short, native_llong, H5T__conv_short_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_ullong", native_short, native_ullong, H5T__conv_short_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_llong", native_ushort, native_llong, H5T__conv_ushort_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_ullong", native_ushort, native_ullong, H5T__conv_ushort_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_long", native_short, native_long, H5T__conv_short_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_ulong", native_short, native_ulong, H5T__conv_short_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_long", native_ushort, native_long, H5T__conv_ushort_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_ulong", native_ushort, native_ulong, H5T__conv_ushort_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_ushort", native_short, native_ushort, H5T__conv_short_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_short", native_ushort, native_short, H5T__conv_ushort_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_int", native_short, native_int, H5T__conv_short_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_uint", native_short, native_uint, H5T__conv_short_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_int", native_ushort, native_int, H5T__conv_ushort_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_uint", native_ushort, native_uint, H5T__conv_ushort_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_schar", native_short, native_schar, H5T__conv_short_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_uchar", native_short, native_uchar, H5T__conv_short_uchar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_schar", native_ushort, native_schar, H5T__conv_ushort_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_uchar", native_ushort, native_uchar, H5T__conv_ushort_uchar, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_llong", native_short, native_llong, H5T__conv_short_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_ullong", native_short, native_ullong, H5T__conv_short_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_llong", native_ushort, native_llong, H5T__conv_ushort_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_ullong", native_ushort, native_ullong, H5T__conv_ushort_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_long", native_short, native_long, H5T__conv_short_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_ulong", native_short, native_ulong, H5T__conv_short_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_long", native_ushort, native_long, H5T__conv_ushort_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_ulong", native_ushort, native_ulong, H5T__conv_ushort_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_ushort", native_short, native_ushort, H5T__conv_short_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_short", native_ushort, native_short, H5T__conv_ushort_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_int", native_short, native_int, H5T__conv_short_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_uint", native_short, native_uint, H5T__conv_short_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_int", native_ushort, native_int, H5T__conv_ushort_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_uint", native_ushort, native_uint, H5T__conv_ushort_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_schar", native_short, native_schar, H5T__conv_short_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_uchar", native_short, native_uchar, H5T__conv_short_uchar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_schar", native_ushort, native_schar, H5T__conv_ushort_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_uchar", native_ushort, native_uchar, H5T__conv_ushort_uchar);
 
     /* From int */
-    status |= H5T_register(H5T_PERS_HARD, "int_llong", native_int, native_llong, H5T__conv_int_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_ullong", native_int, native_ullong, H5T__conv_int_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_llong", native_uint, native_llong, H5T__conv_uint_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_ullong", native_uint, native_ullong, H5T__conv_uint_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_long", native_int, native_long, H5T__conv_int_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_ulong", native_int, native_ulong, H5T__conv_int_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_long", native_uint, native_long, H5T__conv_uint_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_ulong", native_uint, native_ulong, H5T__conv_uint_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_short", native_int, native_short, H5T__conv_int_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_ushort", native_int, native_ushort, H5T__conv_int_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_short", native_uint, native_short, H5T__conv_uint_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_ushort", native_uint, native_ushort, H5T__conv_uint_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_uint", native_int, native_uint, H5T__conv_int_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_int", native_uint, native_int, H5T__conv_uint_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_schar", native_int, native_schar, H5T__conv_int_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_uchar", native_int, native_uchar, H5T__conv_int_uchar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_schar", native_uint, native_schar, H5T__conv_uint_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_uchar", native_uint, native_uchar, H5T__conv_uint_uchar, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_llong", native_int, native_llong, H5T__conv_int_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_ullong", native_int, native_ullong, H5T__conv_int_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_llong", native_uint, native_llong, H5T__conv_uint_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_ullong", native_uint, native_ullong, H5T__conv_uint_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_long", native_int, native_long, H5T__conv_int_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_ulong", native_int, native_ulong, H5T__conv_int_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_long", native_uint, native_long, H5T__conv_uint_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_ulong", native_uint, native_ulong, H5T__conv_uint_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_short", native_int, native_short, H5T__conv_int_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_ushort", native_int, native_ushort, H5T__conv_int_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_short", native_uint, native_short, H5T__conv_uint_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_ushort", native_uint, native_ushort, H5T__conv_uint_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_uint", native_int, native_uint, H5T__conv_int_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_int", native_uint, native_int, H5T__conv_uint_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_schar", native_int, native_schar, H5T__conv_int_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_uchar", native_int, native_uchar, H5T__conv_int_uchar);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_schar", native_uint, native_schar, H5T__conv_uint_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_uchar", native_uint, native_uchar, H5T__conv_uint_uchar);
 
     /* From char */
-    status |= H5T_register(H5T_PERS_HARD, "schar_llong", native_schar, native_llong, H5T__conv_schar_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_ullong", native_schar, native_ullong, H5T__conv_schar_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_llong", native_uchar, native_llong, H5T__conv_uchar_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_ullong", native_uchar, native_ullong, H5T__conv_uchar_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_long", native_schar, native_long, H5T__conv_schar_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_ulong", native_schar, native_ulong, H5T__conv_schar_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_long", native_uchar, native_long, H5T__conv_uchar_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_ulong", native_uchar, native_ulong, H5T__conv_uchar_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_short", native_schar, native_short, H5T__conv_schar_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_ushort", native_schar, native_ushort, H5T__conv_schar_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_short", native_uchar, native_short, H5T__conv_uchar_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_ushort", native_uchar, native_ushort, H5T__conv_uchar_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_int", native_schar, native_int, H5T__conv_schar_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_uint", native_schar, native_uint, H5T__conv_schar_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_int", native_uchar, native_int, H5T__conv_uchar_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_uint", native_uchar, native_uint, H5T__conv_uchar_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_uchar", native_schar, native_uchar, H5T__conv_schar_uchar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_schar", native_uchar, native_schar, H5T__conv_uchar_schar, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_llong", native_schar, native_llong, H5T__conv_schar_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_ullong", native_schar, native_ullong, H5T__conv_schar_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_llong", native_uchar, native_llong, H5T__conv_uchar_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_ullong", native_uchar, native_ullong, H5T__conv_uchar_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_long", native_schar, native_long, H5T__conv_schar_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_ulong", native_schar, native_ulong, H5T__conv_schar_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_long", native_uchar, native_long, H5T__conv_uchar_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_ulong", native_uchar, native_ulong, H5T__conv_uchar_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_short", native_schar, native_short, H5T__conv_schar_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_ushort", native_schar, native_ushort, H5T__conv_schar_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_short", native_uchar, native_short, H5T__conv_uchar_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_ushort", native_uchar, native_ushort, H5T__conv_uchar_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_int", native_schar, native_int, H5T__conv_schar_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_uint", native_schar, native_uint, H5T__conv_schar_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_int", native_uchar, native_int, H5T__conv_uchar_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_uint", native_uchar, native_uint, H5T__conv_uchar_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_uchar", native_schar, native_uchar, H5T__conv_schar_uchar);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_schar", native_uchar, native_schar, H5T__conv_uchar_schar);
 
     /* From char to floats */
-    status |= H5T_register(H5T_PERS_HARD, "schar_flt", native_schar, native_float, H5T__conv_schar_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_dbl", native_schar, native_double, H5T__conv_schar_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "schar_ldbl", native_schar, native_ldouble, H5T__conv_schar_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_flt", native_schar, native_float, H5T__conv_schar_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_dbl", native_schar, native_double, H5T__conv_schar_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "schar_ldbl", native_schar, native_ldouble, H5T__conv_schar_ldouble);
 
     /* From unsigned char to floats */
-    status |= H5T_register(H5T_PERS_HARD, "uchar_flt", native_uchar, native_float, H5T__conv_uchar_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_dbl", native_uchar, native_double, H5T__conv_uchar_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uchar_ldbl", native_uchar, native_ldouble, H5T__conv_uchar_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_flt", native_uchar, native_float, H5T__conv_uchar_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_dbl", native_uchar, native_double, H5T__conv_uchar_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "uchar_ldbl", native_uchar, native_ldouble, H5T__conv_uchar_ldouble);
 
     /* From short to floats */
-    status |= H5T_register(H5T_PERS_HARD, "short_flt", native_short, native_float, H5T__conv_short_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_dbl", native_short, native_double, H5T__conv_short_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "short_ldbl", native_short, native_ldouble, H5T__conv_short_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_flt", native_short, native_float, H5T__conv_short_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_dbl", native_short, native_double, H5T__conv_short_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "short_ldbl", native_short, native_ldouble, H5T__conv_short_ldouble);
 
     /* From unsigned short to floats */
-    status |= H5T_register(H5T_PERS_HARD, "ushort_flt", native_ushort, native_float, H5T__conv_ushort_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_dbl", native_ushort, native_double, H5T__conv_ushort_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ushort_ldbl", native_ushort, native_ldouble, H5T__conv_ushort_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_flt", native_ushort, native_float, H5T__conv_ushort_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_dbl", native_ushort, native_double, H5T__conv_ushort_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "ushort_ldbl", native_ushort, native_ldouble, H5T__conv_ushort_ldouble);
 
     /* From int to floats */
-    status |= H5T_register(H5T_PERS_HARD, "int_flt", native_int, native_float, H5T__conv_int_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_dbl", native_int, native_double, H5T__conv_int_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "int_ldbl", native_int, native_ldouble, H5T__conv_int_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_flt", native_int, native_float, H5T__conv_int_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_dbl", native_int, native_double, H5T__conv_int_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "int_ldbl", native_int, native_ldouble, H5T__conv_int_ldouble);
 
     /* From unsigned int to floats */
-    status |= H5T_register(H5T_PERS_HARD, "uint_flt", native_uint, native_float, H5T__conv_uint_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_dbl", native_uint, native_double, H5T__conv_uint_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "uint_ldbl", native_uint, native_ldouble, H5T__conv_uint_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_flt", native_uint, native_float, H5T__conv_uint_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_dbl", native_uint, native_double, H5T__conv_uint_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "uint_ldbl", native_uint, native_ldouble, H5T__conv_uint_ldouble);
 
     /* From long to floats */
-    status |= H5T_register(H5T_PERS_HARD, "long_flt", native_long, native_float, H5T__conv_long_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_dbl", native_long, native_double, H5T__conv_long_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "long_ldbl", native_long, native_ldouble, H5T__conv_long_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_flt", native_long, native_float, H5T__conv_long_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_dbl", native_long, native_double, H5T__conv_long_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "long_ldbl", native_long, native_ldouble, H5T__conv_long_ldouble);
 
     /* From unsigned long to floats */
-    status |= H5T_register(H5T_PERS_HARD, "ulong_flt", native_ulong, native_float, H5T__conv_ulong_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_dbl", native_ulong, native_double, H5T__conv_ulong_double, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ulong_ldbl", native_ulong, native_ldouble, H5T__conv_ulong_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_flt", native_ulong, native_float, H5T__conv_ulong_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_dbl", native_ulong, native_double, H5T__conv_ulong_double);
+    status |= H5T__register_int(H5T_PERS_HARD, "ulong_ldbl", native_ulong, native_ldouble, H5T__conv_ulong_ldouble);
 
     /* From long long to floats */
-    status |= H5T_register(H5T_PERS_HARD, "llong_flt", native_llong, native_float, H5T__conv_llong_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "llong_dbl", native_llong, native_double, H5T__conv_llong_double, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_flt", native_llong, native_float, H5T__conv_llong_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_dbl", native_llong, native_double, H5T__conv_llong_double);
 #ifdef H5T_CONV_INTERNAL_LLONG_LDOUBLE
-    status |= H5T_register(H5T_PERS_HARD, "llong_ldbl", native_llong, native_ldouble, H5T__conv_llong_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "llong_ldbl", native_llong, native_ldouble, H5T__conv_llong_ldouble);
 #endif /* H5T_CONV_INTERNAL_LLONG_LDOUBLE */
 
     /* From unsigned long long to floats */
-    status |= H5T_register(H5T_PERS_HARD, "ullong_flt", native_ullong, native_float, H5T__conv_ullong_float, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ullong_dbl", native_ullong, native_double, H5T__conv_ullong_double, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_flt", native_ullong, native_float, H5T__conv_ullong_float);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_dbl", native_ullong, native_double, H5T__conv_ullong_double);
 #ifdef H5T_CONV_INTERNAL_ULLONG_LDOUBLE
-    status |= H5T_register(H5T_PERS_HARD, "ullong_ldbl", native_ullong, native_ldouble, H5T__conv_ullong_ldouble, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "ullong_ldbl", native_ullong, native_ldouble, H5T__conv_ullong_ldouble);
 #endif /* H5T_CONV_INTERNAL_ULLONG_LDOUBLE */
 
     /* From floats to char */
-    status |= H5T_register(H5T_PERS_HARD, "flt_schar", native_float, native_schar, H5T__conv_float_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_schar", native_double, native_schar, H5T__conv_double_schar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_schar", native_ldouble, native_schar, H5T__conv_ldouble_schar, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_schar", native_float, native_schar, H5T__conv_float_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_schar", native_double, native_schar, H5T__conv_double_schar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_schar", native_ldouble, native_schar, H5T__conv_ldouble_schar);
 
     /* From floats to unsigned char */
-    status |= H5T_register(H5T_PERS_HARD, "flt_uchar", native_float, native_uchar, H5T__conv_float_uchar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_uchar", native_double, native_uchar, H5T__conv_double_uchar, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_uchar", native_ldouble, native_uchar, H5T__conv_ldouble_uchar, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_uchar", native_float, native_uchar, H5T__conv_float_uchar);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_uchar", native_double, native_uchar, H5T__conv_double_uchar);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_uchar", native_ldouble, native_uchar, H5T__conv_ldouble_uchar);
 
     /* From floats to short */
-    status |= H5T_register(H5T_PERS_HARD, "flt_short", native_float, native_short, H5T__conv_float_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_short", native_double, native_short, H5T__conv_double_short, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_short", native_ldouble, native_short, H5T__conv_ldouble_short, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_short", native_float, native_short, H5T__conv_float_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_short", native_double, native_short, H5T__conv_double_short);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_short", native_ldouble, native_short, H5T__conv_ldouble_short);
 
     /* From floats to unsigned short */
-    status |= H5T_register(H5T_PERS_HARD, "flt_ushort", native_float, native_ushort, H5T__conv_float_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_ushort", native_double, native_ushort, H5T__conv_double_ushort, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_ushort", native_ldouble, native_ushort, H5T__conv_ldouble_ushort, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_ushort", native_float, native_ushort, H5T__conv_float_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_ushort", native_double, native_ushort, H5T__conv_double_ushort);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_ushort", native_ldouble, native_ushort, H5T__conv_ldouble_ushort);
 
     /* From floats to int */
-    status |= H5T_register(H5T_PERS_HARD, "flt_int", native_float, native_int, H5T__conv_float_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_int", native_double, native_int, H5T__conv_double_int, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_int", native_ldouble, native_int, H5T__conv_ldouble_int, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_int", native_float, native_int, H5T__conv_float_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_int", native_double, native_int, H5T__conv_double_int);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_int", native_ldouble, native_int, H5T__conv_ldouble_int);
 
     /* From floats to unsigned int */
-    status |= H5T_register(H5T_PERS_HARD, "flt_uint", native_float, native_uint, H5T__conv_float_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_uint", native_double, native_uint, H5T__conv_double_uint, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_uint", native_ldouble, native_uint, H5T__conv_ldouble_uint, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_uint", native_float, native_uint, H5T__conv_float_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_uint", native_double, native_uint, H5T__conv_double_uint);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_uint", native_ldouble, native_uint, H5T__conv_ldouble_uint);
 
     /* From floats to long */
-    status |= H5T_register(H5T_PERS_HARD, "flt_long", native_float, native_long, H5T__conv_float_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_long", native_double, native_long, H5T__conv_double_long, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_long", native_ldouble, native_long, H5T__conv_ldouble_long, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_long", native_float, native_long, H5T__conv_float_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_long", native_double, native_long, H5T__conv_double_long);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_long", native_ldouble, native_long, H5T__conv_ldouble_long);
 
     /* From floats to unsigned long */
-    status |= H5T_register(H5T_PERS_HARD, "flt_ulong", native_float, native_ulong, H5T__conv_float_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_ulong", native_double, native_ulong, H5T__conv_double_ulong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_ulong", native_ldouble, native_ulong, H5T__conv_ldouble_ulong, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_ulong", native_float, native_ulong, H5T__conv_float_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_ulong", native_double, native_ulong, H5T__conv_double_ulong);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_ulong", native_ldouble, native_ulong, H5T__conv_ldouble_ulong);
 
     /* From floats to long long */
-    status |= H5T_register(H5T_PERS_HARD, "flt_llong", native_float, native_llong, H5T__conv_float_llong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_llong", native_double, native_llong, H5T__conv_double_llong, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_llong", native_float, native_llong, H5T__conv_float_llong);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_llong", native_double, native_llong, H5T__conv_double_llong);
 #ifdef H5T_CONV_INTERNAL_LDOUBLE_LLONG
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_llong", native_ldouble, native_llong, H5T__conv_ldouble_llong, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_llong", native_ldouble, native_llong, H5T__conv_ldouble_llong);
 #endif /* H5T_CONV_INTERNAL_LDOUBLE_LLONG */
 
     /* From floats to unsigned long long */
-    status |= H5T_register(H5T_PERS_HARD, "flt_ullong", native_float, native_ullong, H5T__conv_float_ullong, H5AC_noio_dxpl_id, FALSE);
-    status |= H5T_register(H5T_PERS_HARD, "dbl_ullong", native_double, native_ullong, H5T__conv_double_ullong, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "flt_ullong", native_float, native_ullong, H5T__conv_float_ullong);
+    status |= H5T__register_int(H5T_PERS_HARD, "dbl_ullong", native_double, native_ullong, H5T__conv_double_ullong);
 #if H5T_CONV_INTERNAL_LDOUBLE_ULLONG
-    status |= H5T_register(H5T_PERS_HARD, "ldbl_ullong", native_ldouble, native_ullong, H5T__conv_ldouble_ullong, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "ldbl_ullong", native_ldouble, native_ullong, H5T__conv_ldouble_ullong);
 #endif /* H5T_CONV_INTERNAL_LDOUBLE_ULLONG */
 
     /*
@@ -1243,13 +1267,13 @@ H5T__init_package(void)
      * data types we use are not important as long as the source and
      * destination are equal.
      */
-    status |= H5T_register(H5T_PERS_HARD, "no-op", native_int, native_int, H5T__conv_noop, H5AC_noio_dxpl_id, FALSE);
+    status |= H5T__register_int(H5T_PERS_HARD, "no-op", native_int, native_int, H5T__conv_noop);
 
     /* Initialize the +/- Infinity values for floating-point types */
     status |= H5T__init_inf();
 
     if(status < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to register conversion function(s)")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to register conversion function(s)")
 
     /* Register datatype creation property class properties here.  See similar
      * code in H5D__init_package(), etc. for example.
@@ -1271,20 +1295,20 @@ H5T__init_package(void)
 done:
     /* General cleanup */
     if(compound != NULL)
-        H5T_close(compound);
+        (void)H5T_close_real(compound);
     if(enum_type != NULL)
-        H5T_close(enum_type);
+        (void)H5T_close_real(enum_type);
     if(vlen != NULL)
-        H5T_close(vlen);
+        (void)H5T_close_real(vlen);
     if(array != NULL)
-        H5T_close(array);
+        (void)H5T_close_real(array);
 
     /* Error cleanup */
     if(ret_value < 0) {
         if(dt) {
-            /* Check if we should call H5T_close or H5FL_FREE */
+            /* Check if we should call H5T_close_real or H5FL_FREE */
             if(copied_dtype)
-                H5T_close(dt);
+                (void)H5T_close_real(dt);
             else {
                 dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
                 dt = H5FL_FREE(H5T_t, dt);
@@ -1297,15 +1321,15 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__unlock_cb
+ * Function:   H5T__unlock_cb
  *
- * Purpose:	Clear the immutable flag for a datatype.  This function is
- *		called when the library is closing in order to unlock all
- *		registered datatypes and thus make them free-able.
+ * Purpose:    Clear the immutable flag for a datatype.  This function is
+ *             called when the library is closing in order to unlock all
+ *             registered datatypes and thus make them free-able.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:     Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:  Robb Matzke
  *              Monday, April 27, 1998
  *
  *-------------------------------------------------------------------------
@@ -1313,16 +1337,15 @@ done:
 static int
 H5T__unlock_cb(void *_dt, hid_t H5_ATTR_UNUSED id, void *_udata)
 {
-    H5T_t	*dt = (H5T_t *)_dt;
-    int *n = (int *)_udata;
+    H5T_t    *dt = (H5T_t *)_dt;
+    int      *n = (int *)_udata;
 
     FUNC_ENTER_STATIC_NOERR
 
     HDassert(dt && dt->shared);
 
     if(H5T_STATE_IMMUTABLE==dt->shared->state) {
-	dt->shared->state = H5T_STATE_RDONLY;
-
+        dt->shared->state = H5T_STATE_RDONLY;
         (*n)++;
     } /* end if */
 
@@ -1331,15 +1354,15 @@ H5T__unlock_cb(void *_dt, hid_t H5_ATTR_UNUSED id, void *_udata)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_top_term_package
+ * Function:   H5T_top_term_package
  *
- * Purpose:	Close the "top" of the interface, releasing IDs, etc.
+ * Purpose:    Close the "top" of the interface, releasing IDs, etc.
  *
- * Return:	Success:	Positive if any action might have caused a
- *				change in some other interface; zero otherwise.
- * 		Failure:	Negative
+ * Return:     Success:    Positive if any action might have caused a
+ *                            change in some other interface; zero otherwise.
+ *             Failure:    Negative
  *
- * Programmer:	Quincey Koziol
+ * Programmer:  Quincey Koziol
  *              Thursday, September 10, 2015
  *
  *-------------------------------------------------------------------------
@@ -1347,13 +1370,13 @@ H5T__unlock_cb(void *_dt, hid_t H5_ATTR_UNUSED id, void *_udata)
 int
 H5T_top_term_package(void)
 {
-    int	n = 0;
+    int    n = 0;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
     if(H5T_top_package_initialize_s) {
-	/* Unregister all conversion functions */
-	if(H5T_g.path) {
+        /* Unregister all conversion functions */
+        if(H5T_g.path) {
             int i, nprint = 0;
 
             for(i = 0; i < H5T_g.npaths; i++) {
@@ -1361,27 +1384,41 @@ H5T_top_term_package(void)
 
                 path = H5T_g.path[i];
                 HDassert(path);
-                if(path->func) {
+                if(path->conv.u.app_func) {
                     H5T__print_stats(path, &nprint/*in,out*/);
                     path->cdata.command = H5T_CONV_FREE;
-                    if((path->func)((hid_t)FAIL, (hid_t)FAIL, &(path->cdata), (size_t)0,
-                            (size_t)0, (size_t)0, NULL, NULL,H5AC_noio_dxpl_id) < 0) {
+                    if(path->conv.is_app) {
+                        if((path->conv.u.app_func)((hid_t)FAIL, (hid_t)FAIL, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, H5CX_get_dxpl()) < 0) {
 #ifdef H5T_DEBUG
-                        if (H5DEBUG(T)) {
-                            fprintf(H5DEBUG(T), "H5T: conversion function "
-                                     "0x%08lx failed to free private data for "
-                                     "%s (ignored)\n",
-                                     (unsigned long)(path->func), path->name);
-                        } /* end if */
+                            if (H5DEBUG(T)) {
+                                fprintf(H5DEBUG(T), "H5T: conversion function "
+                                        "0x%08lx failed to free private data for "
+                                        "%s (ignored)\n",
+                                        (unsigned long)(path->conv.u.app_func), path->name);
+                            } /* end if */
 #endif
-                        H5E_clear_stack(NULL); /*ignore the error*/
+                            H5E_clear_stack(NULL); /*ignore the error*/
+                        } /* end if */
                     } /* end if */
+                    else {
+                        if((path->conv.u.lib_func)((hid_t)FAIL, (hid_t)FAIL, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0) {
+#ifdef H5T_DEBUG
+                            if (H5DEBUG(T)) {
+                                fprintf(H5DEBUG(T), "H5T: conversion function "
+                                        "0x%08lx failed to free private data for "
+                                        "%s (ignored)\n",
+                                        (unsigned long)(path->conv.u.lib_func), path->name);
+                            } /* end if */
+#endif
+                            H5E_clear_stack(NULL); /*ignore the error*/
+                        } /* end if */
+                    } /* end else */
                 } /* end if */
 
                 if(path->src)
-                    H5T_close(path->src);
+                    (void)H5T_close_real(path->src);
                 if(path->dst)
-                    H5T_close(path->dst);
+                    (void)H5T_close_real(path->dst);
                 path = H5FL_FREE(H5T_path_t, path);
                 H5T_g.path[i] = NULL;
             } /* end for */
@@ -1397,118 +1434,118 @@ H5T_top_term_package(void)
             n++;
         } /* end if */
 
-	/* Unlock all datatypes, then free them */
-	/* note that we are ignoring the return value from H5I_iterate() */
+        /* Unlock all datatypes, then free them */
+        /* note that we are ignoring the return value from H5I_iterate() */
         /* Also note that we are incrementing 'n' in the callback */
-	H5I_iterate(H5I_DATATYPE, H5T__unlock_cb, &n, FALSE);
+        H5I_iterate(H5I_DATATYPE, H5T__unlock_cb, &n, FALSE);
 
         /* Release all datatype IDs */
-	if(H5I_nmembers(H5I_DATATYPE) > 0) {
-	    (void)H5I_clear_type(H5I_DATATYPE, FALSE, FALSE);
+        if(H5I_nmembers(H5I_DATATYPE) > 0) {
+            (void)H5I_clear_type(H5I_DATATYPE, FALSE, FALSE);
             n++; /*H5I*/
-	} /* end if */
+        } /* end if */
 
         /* Reset all the datatype IDs */
         if(H5T_IEEE_F32BE_g > 0) {
-            H5T_IEEE_F32BE_g			= FAIL;
-            H5T_IEEE_F32LE_g			= FAIL;
-            H5T_IEEE_F64BE_g			= FAIL;
-            H5T_IEEE_F64LE_g			= FAIL;
-
-            H5T_STD_I8BE_g			= FAIL;
-            H5T_STD_I8LE_g			= FAIL;
-            H5T_STD_I16BE_g			= FAIL;
-            H5T_STD_I16LE_g			= FAIL;
-            H5T_STD_I32BE_g			= FAIL;
-            H5T_STD_I32LE_g			= FAIL;
-            H5T_STD_I64BE_g			= FAIL;
-            H5T_STD_I64LE_g			= FAIL;
-            H5T_STD_U8BE_g			= FAIL;
-            H5T_STD_U8LE_g			= FAIL;
-            H5T_STD_U16BE_g			= FAIL;
-            H5T_STD_U16LE_g			= FAIL;
-            H5T_STD_U32BE_g			= FAIL;
-            H5T_STD_U32LE_g			= FAIL;
-            H5T_STD_U64BE_g			= FAIL;
-            H5T_STD_U64LE_g			= FAIL;
-            H5T_STD_B8BE_g			= FAIL;
-            H5T_STD_B8LE_g			= FAIL;
-            H5T_STD_B16BE_g			= FAIL;
-            H5T_STD_B16LE_g			= FAIL;
-            H5T_STD_B32BE_g			= FAIL;
-            H5T_STD_B32LE_g			= FAIL;
-            H5T_STD_B64BE_g			= FAIL;
-            H5T_STD_B64LE_g 			= FAIL;
-            H5T_STD_REF_OBJ_g 			= FAIL;
-            H5T_STD_REF_DSETREG_g 		= FAIL;
-
-            H5T_UNIX_D32BE_g			= FAIL;
-            H5T_UNIX_D32LE_g			= FAIL;
-            H5T_UNIX_D64BE_g			= FAIL;
-            H5T_UNIX_D64LE_g 			= FAIL;
-
-            H5T_C_S1_g				= FAIL;
-
-            H5T_FORTRAN_S1_g			= FAIL;
-
-            H5T_NATIVE_SCHAR_g			= FAIL;
-            H5T_NATIVE_UCHAR_g			= FAIL;
-            H5T_NATIVE_SHORT_g			= FAIL;
-            H5T_NATIVE_USHORT_g			= FAIL;
-            H5T_NATIVE_INT_g			= FAIL;
-            H5T_NATIVE_UINT_g			= FAIL;
-            H5T_NATIVE_LONG_g			= FAIL;
-            H5T_NATIVE_ULONG_g			= FAIL;
-            H5T_NATIVE_LLONG_g			= FAIL;
-            H5T_NATIVE_ULLONG_g			= FAIL;
-            H5T_NATIVE_FLOAT_g			= FAIL;
-            H5T_NATIVE_DOUBLE_g			= FAIL;
+            H5T_IEEE_F32BE_g            = FAIL;
+            H5T_IEEE_F32LE_g            = FAIL;
+            H5T_IEEE_F64BE_g            = FAIL;
+            H5T_IEEE_F64LE_g            = FAIL;
+
+            H5T_STD_I8BE_g              = FAIL;
+            H5T_STD_I8LE_g              = FAIL;
+            H5T_STD_I16BE_g             = FAIL;
+            H5T_STD_I16LE_g             = FAIL;
+            H5T_STD_I32BE_g             = FAIL;
+            H5T_STD_I32LE_g             = FAIL;
+            H5T_STD_I64BE_g             = FAIL;
+            H5T_STD_I64LE_g             = FAIL;
+            H5T_STD_U8BE_g              = FAIL;
+            H5T_STD_U8LE_g              = FAIL;
+            H5T_STD_U16BE_g             = FAIL;
+            H5T_STD_U16LE_g             = FAIL;
+            H5T_STD_U32BE_g             = FAIL;
+            H5T_STD_U32LE_g             = FAIL;
+            H5T_STD_U64BE_g             = FAIL;
+            H5T_STD_U64LE_g             = FAIL;
+            H5T_STD_B8BE_g              = FAIL;
+            H5T_STD_B8LE_g              = FAIL;
+            H5T_STD_B16BE_g             = FAIL;
+            H5T_STD_B16LE_g             = FAIL;
+            H5T_STD_B32BE_g             = FAIL;
+            H5T_STD_B32LE_g             = FAIL;
+            H5T_STD_B64BE_g             = FAIL;
+            H5T_STD_B64LE_g             = FAIL;
+            H5T_STD_REF_OBJ_g           = FAIL;
+            H5T_STD_REF_DSETREG_g       = FAIL;
+
+            H5T_UNIX_D32BE_g            = FAIL;
+            H5T_UNIX_D32LE_g            = FAIL;
+            H5T_UNIX_D64BE_g            = FAIL;
+            H5T_UNIX_D64LE_g            = FAIL;
+
+            H5T_C_S1_g                  = FAIL;
+
+            H5T_FORTRAN_S1_g            = FAIL;
+
+            H5T_NATIVE_SCHAR_g          = FAIL;
+            H5T_NATIVE_UCHAR_g          = FAIL;
+            H5T_NATIVE_SHORT_g          = FAIL;
+            H5T_NATIVE_USHORT_g         = FAIL;
+            H5T_NATIVE_INT_g            = FAIL;
+            H5T_NATIVE_UINT_g           = FAIL;
+            H5T_NATIVE_LONG_g           = FAIL;
+            H5T_NATIVE_ULONG_g          = FAIL;
+            H5T_NATIVE_LLONG_g          = FAIL;
+            H5T_NATIVE_ULLONG_g         = FAIL;
+            H5T_NATIVE_FLOAT_g          = FAIL;
+            H5T_NATIVE_DOUBLE_g         = FAIL;
 #if H5_SIZEOF_LONG_DOUBLE !=0
-            H5T_NATIVE_LDOUBLE_g		= FAIL;
+            H5T_NATIVE_LDOUBLE_g        = FAIL;
 #endif
-            H5T_NATIVE_B8_g			= FAIL;
-            H5T_NATIVE_B16_g			= FAIL;
-            H5T_NATIVE_B32_g			= FAIL;
-            H5T_NATIVE_B64_g			= FAIL;
-            H5T_NATIVE_OPAQUE_g			= FAIL;
-            H5T_NATIVE_HADDR_g			= FAIL;
-            H5T_NATIVE_HSIZE_g			= FAIL;
-            H5T_NATIVE_HSSIZE_g			= FAIL;
-            H5T_NATIVE_HERR_g			= FAIL;
-            H5T_NATIVE_HBOOL_g			= FAIL;
-
-            H5T_NATIVE_INT8_g			= FAIL;
-            H5T_NATIVE_UINT8_g			= FAIL;
-            H5T_NATIVE_INT_LEAST8_g		= FAIL;
-            H5T_NATIVE_UINT_LEAST8_g		= FAIL;
-            H5T_NATIVE_INT_FAST8_g		= FAIL;
-            H5T_NATIVE_UINT_FAST8_g		= FAIL;
-
-            H5T_NATIVE_INT16_g			= FAIL;
-            H5T_NATIVE_UINT16_g			= FAIL;
-            H5T_NATIVE_INT_LEAST16_g		= FAIL;
-            H5T_NATIVE_UINT_LEAST16_g		= FAIL;
-            H5T_NATIVE_INT_FAST16_g		= FAIL;
-            H5T_NATIVE_UINT_FAST16_g		= FAIL;
-
-            H5T_NATIVE_INT32_g			= FAIL;
-            H5T_NATIVE_UINT32_g			= FAIL;
-            H5T_NATIVE_INT_LEAST32_g		= FAIL;
-            H5T_NATIVE_UINT_LEAST32_g		= FAIL;
-            H5T_NATIVE_INT_FAST32_g		= FAIL;
-            H5T_NATIVE_UINT_FAST32_g		= FAIL;
-
-            H5T_NATIVE_INT64_g			= FAIL;
-            H5T_NATIVE_UINT64_g			= FAIL;
-            H5T_NATIVE_INT_LEAST64_g		= FAIL;
-            H5T_NATIVE_UINT_LEAST64_g		= FAIL;
-            H5T_NATIVE_INT_FAST64_g		= FAIL;
-            H5T_NATIVE_UINT_FAST64_g		= FAIL;
+            H5T_NATIVE_B8_g             = FAIL;
+            H5T_NATIVE_B16_g            = FAIL;
+            H5T_NATIVE_B32_g            = FAIL;
+            H5T_NATIVE_B64_g            = FAIL;
+            H5T_NATIVE_OPAQUE_g         = FAIL;
+            H5T_NATIVE_HADDR_g          = FAIL;
+            H5T_NATIVE_HSIZE_g          = FAIL;
+            H5T_NATIVE_HSSIZE_g         = FAIL;
+            H5T_NATIVE_HERR_g           = FAIL;
+            H5T_NATIVE_HBOOL_g          = FAIL;
+
+            H5T_NATIVE_INT8_g           = FAIL;
+            H5T_NATIVE_UINT8_g          = FAIL;
+            H5T_NATIVE_INT_LEAST8_g     = FAIL;
+            H5T_NATIVE_UINT_LEAST8_g    = FAIL;
+            H5T_NATIVE_INT_FAST8_g      = FAIL;
+            H5T_NATIVE_UINT_FAST8_g     = FAIL;
+
+            H5T_NATIVE_INT16_g          = FAIL;
+            H5T_NATIVE_UINT16_g         = FAIL;
+            H5T_NATIVE_INT_LEAST16_g    = FAIL;
+            H5T_NATIVE_UINT_LEAST16_g   = FAIL;
+            H5T_NATIVE_INT_FAST16_g     = FAIL;
+            H5T_NATIVE_UINT_FAST16_g    = FAIL;
+
+            H5T_NATIVE_INT32_g          = FAIL;
+            H5T_NATIVE_UINT32_g         = FAIL;
+            H5T_NATIVE_INT_LEAST32_g    = FAIL;
+            H5T_NATIVE_UINT_LEAST32_g   = FAIL;
+            H5T_NATIVE_INT_FAST32_g     = FAIL;
+            H5T_NATIVE_UINT_FAST32_g    = FAIL;
+
+            H5T_NATIVE_INT64_g          = FAIL;
+            H5T_NATIVE_UINT64_g         = FAIL;
+            H5T_NATIVE_INT_LEAST64_g    = FAIL;
+            H5T_NATIVE_UINT_LEAST64_g   = FAIL;
+            H5T_NATIVE_INT_FAST64_g     = FAIL;
+            H5T_NATIVE_UINT_FAST64_g    = FAIL;
 
             n++;
         } /* end if */
 
-	/* Mark "top" of interface as closed */
+    /* Mark "top" of interface as closed */
         if(0 == n)
             H5T_top_package_initialize_s = FALSE;
     } /* end if */
@@ -1518,19 +1555,19 @@ H5T_top_term_package(void)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_term_package
+ * Function:   H5T_term_package
  *
- * Purpose:	Close this interface.
+ * Purpose:    Close this interface.
  *
- * Note:	Finishes shutting down the interface, after
- *		H5T_top_term_package() is called
+ * Note:    Finishes shutting down the interface, after
+ *          H5T_top_term_package() is called
  *
- * Return:	Success:	Positive if any action might have caused a
- *				change in some other interface; zero
- *				otherwise.
- * 		Failure:	Negative
+ * Return:   Success:    Positive if any action might have caused a
+ *                change in some other interface; zero
+ *                otherwise.
+ *           Failure:    Negative
  *
- * Programmer:	Robb Matzke
+ * Programmer:  Robb Matzke
  *              Friday, November 20, 1998
  *
  *-------------------------------------------------------------------------
@@ -1538,7 +1575,7 @@ H5T_top_term_package(void)
 int
 H5T_term_package(void)
 {
-    int	n = 0;
+    int    n = 0;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -1548,9 +1585,9 @@ H5T_term_package(void)
         HDassert(FALSE == H5T_top_package_initialize_s);
 
         /* Destroy the datatype object id group */
-	n += (H5I_dec_type_ref(H5I_DATATYPE) > 0);
+        n += (H5I_dec_type_ref(H5I_DATATYPE) > 0);
 
-	/* Mark interface as closed */
+        /* Mark interface as closed */
         if(0 == n)
             H5_PKG_INIT_VAR = FALSE;
     } /* end if */
@@ -1560,47 +1597,44 @@ H5T_term_package(void)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tcreate
+ * Function:   H5Tcreate
  *
- * Purpose:	Create a new type and initialize it to reasonable values.
- *		The type is a member of type class TYPE and is SIZE bytes.
+ * Purpose:    Create a new type and initialize it to reasonable values.
+ *             The type is a member of type class TYPE and is SIZE bytes.
  *
- * Return:	Success:	A new type identifier.
+ * Return:    Success:    A new type identifier.
  *
- *		Failure:	Negative
+ *            Failure:    Negative
  *
  * Errors:
- *		ARGS	  BADVALUE	Invalid size.
- *		DATATYPE  CANTINIT	Can't create type.
- *		DATATYPE  CANTREGISTER	Can't register datatype atom.
- *
- * Programmer:	Robb Matzke
- *		Friday, December  5, 1997
- *
- * Modifications:
+ *        ARGS      BADVALUE    Invalid size.
+ *        DATATYPE  CANTINIT    Can't create type.
+ *        DATATYPE  CANTREGISTER    Can't register datatype atom.
  *
+ * Programmer:    Robb Matzke
+ *        Friday, December  5, 1997
  *-------------------------------------------------------------------------
  */
 hid_t
 H5Tcreate(H5T_class_t type, size_t size)
 {
-    H5T_t	*dt = NULL;     /* New datatype constructed */
-    hid_t	ret_value;      /* Return value */
+    H5T_t    *dt = NULL;     /* New datatype constructed */
+    hid_t    ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("i", "Ttz", type, size);
 
     /* check args. We support string (fixed-size or variable-length) now. */
     if(size <= 0 && size != H5T_VARIABLE)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "size must be positive")
+    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "size must be positive")
 
     /* create the type */
     if(NULL == (dt = H5T__create(type, size)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to create type")
+    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to create type")
 
     /* Get an ID for the datatype */
     if((ret_value = H5I_register(H5I_DATATYPE, dt, TRUE)) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register datatype ID")
+    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register datatype ID")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1608,55 +1642,55 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tcopy
+ * Function:    H5Tcopy
  *
- * Purpose:	Copies a datatype.  The resulting datatype is not locked.
- *		The datatype should be closed when no longer needed by
- *		calling H5Tclose().
+ * Purpose:    Copies a datatype.  The resulting datatype is not locked.
+ *        The datatype should be closed when no longer needed by
+ *        calling H5Tclose().
  *
- * Return:	Success:	The ID of a new datatype.
+ * Return:    Success:    The ID of a new datatype.
  *
- *		Failure:	Negative
+ *            Failure:    Negative
  *
- * Programmer:	Robb Matzke
- *		Tuesday, December  9, 1997
+ * Programmer:    Robb Matzke
+ *        Tuesday, December  9, 1997
  *
  * Modifications:
  *
- * 	Robb Matzke, 4 Jun 1998
- *	The returned type is always transient and unlocked.  If the TYPE_ID
- *	argument is a dataset instead of a datatype then this function
- *	returns a transient, modifiable datatype which is a copy of the
- *	dataset's datatype.
+ *     Robb Matzke, 4 Jun 1998
+ *    The returned type is always transient and unlocked.  If the TYPE_ID
+ *    argument is a dataset instead of a datatype then this function
+ *    returns a transient, modifiable datatype which is a copy of the
+ *    dataset's datatype.
  *
  *-------------------------------------------------------------------------
  */
 hid_t
 H5Tcopy(hid_t type_id)
 {
-    H5T_t	*dt;                    /* Pointer to the datatype to copy */
-    H5T_t	*new_dt = NULL;
-    hid_t	ret_value;              /* Return value */
+    H5T_t    *dt;                    /* Pointer to the datatype to copy */
+    H5T_t    *new_dt = NULL;
+    hid_t    ret_value;              /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE1("i", "i", type_id);
 
     switch(H5I_get_type(type_id)) {
         case H5I_DATATYPE:
             /* The argument is a datatype handle */
             if(NULL == (dt = (H5T_t *)H5I_object(type_id)))
-                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+                HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a datatype")
             break;
 
         case H5I_DATASET:
             {
-                H5D_t	*dset;          /* Dataset for datatype */
+                H5D_t    *dset;          /* Dataset for datatype */
 
                 /* The argument is a dataset handle */
                 if(NULL == (dset = (H5D_t *)H5I_object(type_id)))
-                    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset")
+                    HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a dataset")
                 if(NULL == (dt = H5D_typeof(dset)))
-                    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "unable to get the dataset datatype")
+                    HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, H5I_INVALID_HID, "unable to get the dataset datatype")
             }
             break;
 
@@ -1675,44 +1709,41 @@ H5Tcopy(hid_t type_id)
         case H5I_ERROR_STACK:
         case H5I_NTYPES:
         default:
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype or dataset")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a datatype or dataset")
     } /* end switch */
 
     /* Copy datatype */
     if(NULL == (new_dt = H5T_copy(dt, H5T_COPY_TRANSIENT)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy");
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5I_INVALID_HID, "unable to copy");
 
     /* Atomize result */
     if((ret_value = H5I_register(H5I_DATATYPE, new_dt, TRUE)) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register datatype atom")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register datatype atom")
 
 done:
     if(ret_value < 0)
-        if(new_dt && H5T_close(new_dt) < 0)
-            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "unable to release datatype info")
+        if(new_dt && H5T_close_real(new_dt) < 0)
+            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, H5I_INVALID_HID, "unable to release datatype info")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Tcopy() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tclose
- *
- * Purpose:	Frees a datatype and all associated memory.
+ * Function:    H5Tclose
  *
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:    Frees a datatype and all associated memory.
  *
- * Programmer:	Robb Matzke
- *		Tuesday, December  9, 1997
- *
- * Modifications:
+ * Return:    Non-negative on success/Negative on failure
  *
+ * Programmer:    Robb Matzke
+ *        Tuesday, December  9, 1997
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Tclose(hid_t type_id)
 {
-    H5T_t	*dt;                    /* Pointer to datatype to close */
+    H5T_t    *dt;                    /* Pointer to datatype to close */
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1720,13 +1751,13 @@ H5Tclose(hid_t type_id)
 
     /* Check args */
     if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if(H5T_STATE_IMMUTABLE == dt->shared->state)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "immutable datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "immutable datatype")
 
     /* When the reference count reaches zero the resources are freed */
     if(H5I_dec_app_ref(type_id) < 0)
-	HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "problem freeing id")
+        HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "problem freeing id")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1734,34 +1765,34 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tequal
+ * Function:  H5Tequal
  *
- * Purpose:	Determines if two datatypes are equal.
+ * Purpose:   Determines if two datatypes are equal.
  *
- * Return:	Success:	TRUE if equal, FALSE if unequal
+ * Return:    Success:    TRUE if equal, FALSE if unequal
  *
- *		Failure:	Negative
+ *            Failure:    Negative
  *
- * Programmer:	Robb Matzke
- *		Wednesday, December 10, 1997
+ * Programmer:    Robb Matzke
+ *        Wednesday, December 10, 1997
  *
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Tequal(hid_t type1_id, hid_t type2_id)
 {
-    const H5T_t	*dt1;           /* Pointer to first datatype */
-    const H5T_t	*dt2;           /* Pointer to second datatype */
-    htri_t		ret_value;      /* Return value */
+    const H5T_t    *dt1;           /* Pointer to first datatype */
+    const H5T_t    *dt2;           /* Pointer to second datatype */
+    htri_t         ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("t", "ii", type1_id, type2_id);
 
     /* check args */
     if(NULL == (dt1 = (H5T_t *)H5I_object_verify(type1_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if(NULL == (dt2 = (H5T_t *)H5I_object_verify(type2_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
     ret_value = (0 == H5T_cmp(dt1, dt2, FALSE)) ? TRUE : FALSE;
 
@@ -1771,33 +1802,33 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tlock
+ * Function:    H5Tlock
  *
- * Purpose:	Locks a type, making it read only and non-destructable.	 This
- *		is normally done by the library for predefined datatypes so
- *		the application doesn't inadvertently change or delete a
- *		predefined type.
+ * Purpose:    Locks a type, making it read only and non-destructable.
+ *        This is normally done by the library for predefined datatypes so
+ *        the application doesn't inadvertently change or delete a
+ *        predefined type.
  *
- *		Once a datatype is locked it can never be unlocked unless
- *		the entire library is closed.
+ *        Once a datatype is locked it can never be unlocked unless
+ *        the entire library is closed.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		Friday, January	 9, 1998
+ * Programmer:    Robb Matzke
+ *        Friday, January     9, 1998
  *
  * Modifications:
  *
- * 	Robb Matzke, 1 Jun 1998
- *	It is illegal to lock a named datatype since we must allow named
- *	types to be closed (to release file resources) but locking a type
- *	prevents that.
+ *     Robb Matzke, 1 Jun 1998
+ *    It is illegal to lock a named datatype since we must allow named
+ *    types to be closed (to release file resources) but locking a type
+ *    prevents that.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Tlock(hid_t type_id)
 {
-    H5T_t	*dt;                    /* Datatype to operate on */
+    H5T_t       *dt;                    /* Datatype to operate on */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1805,12 +1836,12 @@ H5Tlock(hid_t type_id)
 
     /* Check args */
     if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id,H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if(H5T_STATE_NAMED==dt->shared->state || H5T_STATE_OPEN==dt->shared->state)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to lock named datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to lock named datatype")
 
     if(H5T_lock(dt, TRUE) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to lock transient datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to lock transient datatype")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1818,24 +1849,23 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tget_class
+ * Function:  H5Tget_class
  *
- * Purpose:	Returns the datatype class identifier for datatype TYPE_ID.
+ * Purpose:   Returns the datatype class identifier for datatype TYPE_ID.
  *
- * Return:	Success:	One of the non-negative datatype class
- *				constants.
+ * Return:    Success:    One of the non-negative datatype class constants.
  *
- *		Failure:	H5T_NO_CLASS (Negative)
+ *            Failure:    H5T_NO_CLASS (Negative)
  *
- * Programmer:	Robb Matzke
- *		Monday, December  8, 1997
+ * Programmer:    Robb Matzke
+ *        Monday, December  8, 1997
  *
  *-------------------------------------------------------------------------
  */
 H5T_class_t
 H5Tget_class(hid_t type_id)
 {
-    H5T_t	*dt;            /* Pointer to datatype */
+    H5T_t       *dt;            /* Pointer to datatype */
     H5T_class_t ret_value;      /* Return value */
 
     FUNC_ENTER_API(H5T_NO_CLASS)
@@ -1843,7 +1873,7 @@ H5Tget_class(hid_t type_id)
 
     /* Check args */
     if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_NO_CLASS, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5T_NO_CLASS, "not a datatype")
 
     /* Set return value */
     ret_value = H5T_get_class(dt, FALSE);
@@ -1854,17 +1884,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_get_class
+ * Function:  H5T_get_class
  *
- * Purpose:	Returns the data type class identifier for a datatype ptr.
+ * Purpose:   Returns the data type class identifier for a datatype ptr.
  *
- * Return:	Success:	One of the non-negative data type class
- *				constants.
+ * Return:    Success:    One of the non-negative data type class constants.
  *
- *		Failure:	H5T_NO_CLASS (Negative)
+ *            Failure:    H5T_NO_CLASS (Negative)
  *
- * Programmer:	Robb Matzke
- *		Monday, December  8, 1997
+ * Programmer:    Robb Matzke
+ *        Monday, December  8, 1997
  *
  * Modifications:
  *      Broke out from H5Tget_class - QAK - 6/4/99
@@ -1883,7 +1912,8 @@ H5T_get_class(const H5T_t *dt, htri_t internal)
     /* Externally, a VL string is a string; internally, a VL string is a VL. */
     if(internal) {
         ret_value=dt->shared->type;
-    } else {
+    }
+    else {
         if(H5T_IS_VL_STRING(dt->shared))
             ret_value=H5T_STRING;
         else
@@ -1896,24 +1926,21 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tdetect_class
+ * Function:   H5Tdetect_class
  *
- * Purpose:	Check whether a datatype contains (or is) a certain type of
- *		datatype.
+ * Purpose:    Check whether a datatype contains (or is) a certain type of
+ *             datatype.
  *
- * Return:	TRUE (1) or FALSE (0) on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *		Wednesday, November 29, 2000
- *
- * Modifications:
+ * Return:     TRUE (1) or FALSE (0) on success/Negative on failure
  *
+ * Programmer:    Quincey Koziol
+ *        Wednesday, November 29, 2000
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Tdetect_class(hid_t type, H5T_class_t cls)
 {
-    H5T_t	*dt;            /* Datatype to query */
+    H5T_t       *dt;            /* Datatype to query */
     htri_t      ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -1935,15 +1962,15 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_detect_class
+ * Function:   H5T_detect_class
  *
- * Purpose:	Check whether a datatype contains (or is) a certain type of
- *		datatype.
+ * Purpose:    Check whether a datatype contains (or is) a certain type of
+ *             datatype.
  *
- * Return:	TRUE (1) or FALSE (0) on success/Negative on failure
+ * Return:     TRUE (1) or FALSE (0) on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		Wednesday, November 29, 2000
+ * Programmer:    Quincey Koziol
+ *        Wednesday, November 29, 2000
  *
  * Modifications:
  *              Raymond Lu
@@ -1959,7 +1986,7 @@ done:
 htri_t
 H5T_detect_class(const H5T_t *dt, H5T_class_t cls, hbool_t from_api)
 {
-    unsigned	i;
+    unsigned    i;
     htri_t      ret_value = FALSE;        /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
@@ -2020,21 +2047,21 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tis_variable_str
+ * Function:  H5Tis_variable_str
  *
- * Purpose:	Check whether a datatype is a variable-length string
+ * Purpose:   Check whether a datatype is a variable-length string
  *
- * Return:	TRUE (1) or FALSE (0) on success/Negative on failure
+ * Return:    TRUE (1) or FALSE (0) on success/Negative on failure
  *
- * Programmer:	Raymond Lu
- *		November 4, 2002
+ * Programmer:    Raymond Lu
+ *        November 4, 2002
  *
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Tis_variable_str(hid_t dtype_id)
 {
-    H5T_t	*dt;            /* Datatype to query */
+    H5T_t       *dt;            /* Datatype to query */
     htri_t      ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -2054,14 +2081,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_is_variable_str
+ * Function:  H5T_is_variable_str
  *
- * Purpose:	Check whether a datatype is a variable-length string
+ * Purpose:   Check whether a datatype is a variable-length string
  *
- * Return:	TRUE (1) or FALSE (0) on success/Negative on failure
+ * Return:    TRUE (1) or FALSE (0) on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		October 17, 2007
+ * Programmer:    Quincey Koziol
+ *        October 17, 2007
  *
  *-------------------------------------------------------------------------
  */
@@ -2075,33 +2102,33 @@ H5T_is_variable_str(const H5T_t *dt)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tget_size
+ * Function:  H5Tget_size
  *
- * Purpose:	Determines the total size of a datatype in bytes.
+ * Purpose:   Determines the total size of a datatype in bytes.
  *
- * Return:	Success:	Size of the datatype in bytes.	 The size of
- *				datatype is the size of an instance of that
- *				datatype.
+ * Return:    Success:    Size of the datatype in bytes.     The size of
+ *                datatype is the size of an instance of that
+ *                datatype.
  *
- *		Failure:	0 (valid datatypes are never zero size)
+ *            Failure:    0 (valid datatypes are never zero size)
  *
- * Programmer:	Robb Matzke
- *		Monday, December  8, 1997
+ * Programmer:    Robb Matzke
+ *        Monday, December  8, 1997
  *
  *-------------------------------------------------------------------------
  */
 size_t
 H5Tget_size(hid_t type_id)
 {
-    H5T_t	*dt;            /* Datatype to query */
-    size_t	ret_value;      /* Return value */
+    H5T_t     *dt;            /* Datatype to query */
+    size_t    ret_value;      /* Return value */
 
     FUNC_ENTER_API(0)
     H5TRACE1("z", "i", type_id);
 
     /* Check args */
     if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, 0, "not a datatype")
 
     /* size */
     ret_value = H5T_GET_SIZE(dt);
@@ -2112,33 +2139,33 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tset_size
+ * Function:    H5Tset_size
  *
- * Purpose:	Sets the total size in bytes for a datatype (this operation
- *		is not permitted on reference datatypes).  If the size is
- *		decreased so that the significant bits of the datatype
- *		extend beyond the edge of the new size, then the `offset'
- *		property is decreased toward zero.  If the `offset' becomes
- *		zero and the significant bits of the datatype still hang
- *		over the edge of the new size, then the number of significant
- *		bits is decreased.
+ * Purpose:    Sets the total size in bytes for a datatype (this operation
+ *        is not permitted on reference datatypes).  If the size is
+ *        decreased so that the significant bits of the datatype
+ *        extend beyond the edge of the new size, then the `offset'
+ *        property is decreased toward zero.  If the `offset' becomes
+ *        zero and the significant bits of the datatype still hang
+ *        over the edge of the new size, then the number of significant
+ *        bits is decreased.
  *
- *		Adjusting the size of an H5T_STRING automatically sets the
- *		precision to 8*size.
+ *        Adjusting the size of an H5T_STRING automatically sets the
+ *        precision to 8*size.
  *
- *		All datatypes have a positive size.
+ *        All datatypes have a positive size.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		Wednesday, January  7, 1998
+ * Programmer:    Robb Matzke
+ *        Wednesday, January  7, 1998
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Tset_size(hid_t type_id, size_t size)
 {
-    H5T_t	*dt;                    /* Datatype to modify */
+    H5T_t       *dt;                    /* Datatype to modify */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -2146,21 +2173,21 @@ H5Tset_size(hid_t type_id, size_t size)
 
     /* Check args */
     if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if(H5T_STATE_TRANSIENT!=dt->shared->state)
-	HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "datatype is read-only")
+        HGOTO_ERROR(H5E_ARGS, H5E_CANTINIT, FAIL, "datatype is read-only")
     if(size <= 0 && size != H5T_VARIABLE)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "size must be positive")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "size must be positive")
     if(size == H5T_VARIABLE && !H5T_IS_STRING(dt->shared))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "only strings may be variable length")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "only strings may be variable length")
     if(H5T_ENUM == dt->shared->type && dt->shared->u.enumer.nmembs > 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not allowed after members are defined")
     if(H5T_REFERENCE == dt->shared->type)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not defined for this datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "operation not defined for this datatype")
 
     /* Modify the datatype */
-    if(H5T_set_size(dt, size) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set size for datatype")
+    if(H5T__set_size(dt, size) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set size for datatype")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2168,79 +2195,73 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tget_super
+ * Function:  H5Tget_super
  *
- * Purpose:	Returns the type from which TYPE is derived. In the case of
- *		an enumeration type the return value is an integer type.
+ * Purpose:   Returns the type from which TYPE is derived. In the case of
+ *            an enumeration type the return value is an integer type.
  *
- * Return:	Success:	Type ID for base datatype.
+ * Return:    Success:    Type ID for base datatype.
  *
- *		Failure:	negative
+ *            Failure:    negative
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Wednesday, December 23, 1998
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 hid_t
 H5Tget_super(hid_t type)
 {
-    H5T_t	*dt;            /* Datatype to query */
-    H5T_t      *super = NULL;  /* Supertype */
-    hid_t	ret_value;      /* Return value */
+    H5T_t    *dt;            /* Datatype to query */
+    H5T_t    *super = NULL;  /* Supertype */
+    hid_t    ret_value;      /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE1("i", "i", type);
 
     if(NULL == (dt = (H5T_t *)H5I_object_verify(type,H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a datatype")
     if(NULL == (super = H5T_get_super(dt)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5I_INVALID_HID, "not a datatype")
     if((ret_value = H5I_register(H5I_DATATYPE, super, TRUE)) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register parent datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register parent datatype")
 
 done:
     if(ret_value < 0)
-        if(super && H5T_close(super) < 0)
-            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "unable to release super datatype info")
+        if(super && H5T_close_real(super) < 0)
+            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, H5I_INVALID_HID, "unable to release super datatype info")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Tget_super() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_get_super
+ * Function:  H5T_get_super
  *
- * Purpose:	Private function for H5Tget_super.  Returns the type from
- *              which TYPE is derived. In the case of an enumeration type
- *              the return value is an integer type.
+ * Purpose:   Private function for H5Tget_super.  Returns the type from
+ *            which TYPE is derived. In the case of an enumeration type
+ *            the return value is an integer type.
  *
- * Return:	Success:	Data type for base data type.
+ * Return:    Success:    Data type for base data type.
  *
- *		Failure:        NULL
+ *            Failure:        NULL
  *
- * Programmer:	Raymond Lu
+ * Programmer:    Raymond Lu
  *              October 9, 2002
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 H5T_t *
 H5T_get_super(const H5T_t *dt)
 {
-    H5T_t	*ret_value=NULL;
+    H5T_t    *ret_value=NULL;
 
     FUNC_ENTER_NOAPI(NULL)
 
     HDassert(dt);
 
     if (!dt->shared->parent)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "not a derived data type");
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "not a derived data type");
     if (NULL==(ret_value=H5T_copy(dt->shared->parent, H5T_COPY_ALL)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy parent data type");
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy parent data type");
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2248,44 +2269,81 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_register
+ * Function:    H5T__register_int
  *
- * Purpose:	Register a hard or soft conversion function for a data type
- *		conversion path.  The path is specified by the source and
- *		destination data types SRC_ID and DST_ID (for soft functions
- *		only the class of these types is important). If FUNC is a
- *		hard function then it replaces any previous path; if it's a
- *		soft function then it replaces all existing paths to which it
- *		applies and is used for any new path to which it applies as
- *		long as that path doesn't have a hard function.
+ * Purpose:    Register a library internal datatype conversion routine.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		Friday, January	 9, 1998
+ * Programmer:  Quincey Koziol
+ *              Wednesday, March 7, 1998
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5T__register_int(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
+    H5T_lib_conv_t func)
+{
+    H5T_conv_func_t conv_func;          /* Conversion function wrapper */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Check args */
+    HDassert(H5T_PERS_HARD==pers || H5T_PERS_SOFT==pers);
+    HDassert(name && *name);
+    HDassert(src);
+    HDassert(dst);
+    HDassert(func);
+
+    /* Set up conversion function wrapper */
+    conv_func.is_app = FALSE;
+    conv_func.u.lib_func = func;
+
+    /* Register conversion */
+    if(H5T__register(pers, name, src, dst, &conv_func) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to register internal datatype conversion routine")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5T__register_int() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5T__register
  *
- * Modifications:
+ * Purpose:    Register a hard or soft conversion function for a data type
+ *        conversion path.  The path is specified by the source and
+ *        destination data types SRC_ID and DST_ID (for soft functions
+ *        only the class of these types is important). If FUNC is a
+ *        hard function then it replaces any previous path; if it's a
+ *        soft function then it replaces all existing paths to which it
+ *        applies and is used for any new path to which it applies as
+ *        long as that path doesn't have a hard function.
+ *
+ * Return:    Non-negative on success/Negative on failure
  *
+ * Programmer:    Robb Matzke
+ *        Friday, January     9, 1998
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
-	    H5T_conv_t func, hid_t dxpl_id, hbool_t api_call)
+H5T__register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
+    H5T_conv_func_t *conv)
 {
-    hid_t	tmp_sid=-1, tmp_did=-1;/*temporary data type IDs	*/
-    H5T_path_t	*old_path=NULL;		/*existing conversion path	*/
-    H5T_path_t	*new_path=NULL;		/*new conversion path		*/
-    H5T_cdata_t	cdata;			/*temporary conversion data	*/
-    int	nprint=0;		/*number of paths shut down	*/
-    int	i;			/*counter			*/
-    herr_t	ret_value=SUCCEED;		/*return value			*/
+    hid_t         tmp_sid = -1, tmp_did = -1; /*temporary data type IDs    */
+    H5T_path_t    *old_path = NULL;           /*existing conversion path   */
+    H5T_path_t    *new_path = NULL;           /*new conversion path        */
+    H5T_cdata_t   cdata;                      /*temporary conversion data  */
+    int           nprint=0;                   /*number of paths shut down  */
+    int           i;                          /*counter                    */
+    herr_t        ret_value = SUCCEED;        /*return value               */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check args */
     HDassert(src);
     HDassert(dst);
-    HDassert(func);
+    HDassert(conv);
     HDassert(H5T_PERS_HARD==pers || H5T_PERS_SOFT==pers);
     HDassert(name && *name);
 
@@ -2293,7 +2351,7 @@ H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
         /* Only bother to register the path if it's not a no-op path (for this machine) */
         if(H5T_cmp(src, dst, FALSE)) {
             /* Locate or create a new conversion path */
-            if(NULL == (new_path = H5T_path_find(src, dst, name, func, dxpl_id, api_call)))
+            if(NULL == (new_path = H5T__path_find_real(src, dst, name, conv)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to locate/allocate conversion path")
 
             /*
@@ -2306,7 +2364,7 @@ H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
             for(i = 0; i < H5T_g.npaths; i++)
                 if(new_path != H5T_g.path[i])
                     H5T_g.path[i]->cdata.recalc = TRUE;
-	} /* end if */
+        } /* end if */
     } /* end if */
     else {
         /* Add function to end of soft list */
@@ -2323,7 +2381,7 @@ H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
         H5T_g.soft[H5T_g.nsoft].name[H5T_NAMELEN - 1] = '\0';
         H5T_g.soft[H5T_g.nsoft].src = src->shared->type;
         H5T_g.soft[H5T_g.nsoft].dst = dst->shared->type;
-        H5T_g.soft[H5T_g.nsoft].func = func;
+        H5T_g.soft[H5T_g.nsoft].conv = *conv;
         H5T_g.nsoft++;
 
         /*
@@ -2331,29 +2389,38 @@ H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
          * conversion function applies should be replaced by a new path that
          * uses this function.
          */
-        for (i=1; i<H5T_g.npaths; i++) {
+        for(i = 1; i < H5T_g.npaths; i++) {
             old_path = H5T_g.path[i];
             HDassert(old_path);
 
             /* Does the new soft conversion function apply to this path? */
-            if (old_path->is_hard ||
-                    old_path->src->shared->type!=src->shared->type ||
-                    old_path->dst->shared->type!=dst->shared->type) {
+            if(old_path->is_hard ||
+                    old_path->src->shared->type != src->shared->type ||
+                    old_path->dst->shared->type != dst->shared->type)
                 continue;
-            }
+
             if((tmp_sid = H5I_register(H5I_DATATYPE, H5T_copy(old_path->src, H5T_COPY_ALL), FALSE)) < 0 ||
                     (tmp_did = H5I_register(H5I_DATATYPE, H5T_copy(old_path->dst, H5T_COPY_ALL), FALSE)) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register data types for conv query")
             HDmemset(&cdata, 0, sizeof cdata);
             cdata.command = H5T_CONV_INIT;
-            if((func)(tmp_sid, tmp_did, &cdata, (size_t)0, (size_t)0, (size_t)0,
-                    NULL, NULL, dxpl_id) < 0) {
-                H5I_dec_ref(tmp_sid);
-                H5I_dec_ref(tmp_did);
-                tmp_sid = tmp_did = -1;
-                H5E_clear_stack(NULL);
-                continue;
+            if(conv->is_app) {
+                if((conv->u.app_func)(tmp_sid, tmp_did, &cdata, (size_t)0, (size_t)0, (size_t)0, NULL, NULL, H5CX_get_dxpl()) < 0) {
+                    H5I_dec_ref(tmp_sid);
+                    H5I_dec_ref(tmp_did);
+                    tmp_sid = tmp_did = -1;
+                    H5E_clear_stack(NULL);
+                    continue;
+                } /* end if */
             } /* end if */
+            else
+                if((conv->u.lib_func)(tmp_sid, tmp_did, &cdata, (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0) {
+                    H5I_dec_ref(tmp_sid);
+                    H5I_dec_ref(tmp_did);
+                    tmp_sid = tmp_did = -1;
+                    H5E_clear_stack(NULL);
+                    continue;
+                } /* end if */
 
             /* Create a new conversion path */
             if(NULL == (new_path = H5FL_CALLOC(H5T_path_t)))
@@ -2363,7 +2430,7 @@ H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
             if(NULL == (new_path->src = H5T_copy(old_path->src, H5T_COPY_ALL)) ||
                     NULL == (new_path->dst=H5T_copy(old_path->dst, H5T_COPY_ALL)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy data types")
-            new_path->func = func;
+            new_path->conv = *conv;
             new_path->is_hard = FALSE;
             new_path->cdata = cdata;
 
@@ -2374,18 +2441,27 @@ H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
             /* Free old path */
             H5T__print_stats(old_path, &nprint);
             old_path->cdata.command = H5T_CONV_FREE;
-            if ((old_path->func)(tmp_sid, tmp_did, &(old_path->cdata),
-                    (size_t)0, (size_t)0, (size_t)0, NULL, NULL, dxpl_id)<0) {
+            if(old_path->conv.is_app) {
+                if((old_path->conv.u.app_func)(tmp_sid, tmp_did, &(old_path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, H5CX_get_dxpl()) < 0) {
 #ifdef H5T_DEBUG
-		if (H5DEBUG(T)) {
-		    fprintf (H5DEBUG(T), "H5T: conversion function 0x%08lx "
-			     "failed to free private data for %s (ignored)\n",
-			     (unsigned long)(old_path->func), old_path->name);
-		}
+                    if(H5DEBUG(T))
+                        fprintf (H5DEBUG(T), "H5T: conversion function 0x%08lx "
+                            "failed to free private data for %s (ignored)\n",
+                            (unsigned long)(old_path->conv.u.app_func), old_path->name);
 #endif
+                } /* end if */
             } /* end if */
-            H5T_close(old_path->src);
-            H5T_close(old_path->dst);
+            else
+                if((old_path->conv.u.lib_func)(tmp_sid, tmp_did, &(old_path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0) {
+#ifdef H5T_DEBUG
+                    if(H5DEBUG(T))
+                        fprintf (H5DEBUG(T), "H5T: conversion function 0x%08lx "
+                            "failed to free private data for %s (ignored)\n",
+                            (unsigned long)(old_path->conv.u.lib_func), old_path->name);
+#endif
+                } /* end if */
+            (void)H5T_close_real(old_path->src);
+            (void)H5T_close_real(old_path->dst);
             old_path = H5FL_FREE(H5T_path_t, old_path);
 
             /* Release temporary atoms */
@@ -2394,74 +2470,79 @@ H5T_register(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
             tmp_sid = tmp_did = -1;
 
             /* We don't care about any failures during the freeing process */
-	    H5E_clear_stack(NULL);
+            H5E_clear_stack(NULL);
         } /* end for */
     } /* end else */
 
 done:
     if(ret_value < 0) {
-	if(new_path) {
-	    if(new_path->src)
-                H5T_close(new_path->src);
-	    if(new_path->dst)
-                H5T_close(new_path->dst);
-            new_path = H5FL_FREE(H5T_path_t, new_path);
-	} /* end if */
-	if(tmp_sid >= 0)
-            H5I_dec_ref(tmp_sid);
-	if(tmp_did >= 0)
-            H5I_dec_ref(tmp_did);
+        if(new_path) {
+            if(new_path->src)
+                    (void)H5T_close_real(new_path->src);
+            if(new_path->dst)
+                    (void)H5T_close_real(new_path->dst);
+                new_path = H5FL_FREE(H5T_path_t, new_path);
+        } /* end if */
+        if(tmp_sid >= 0)
+                H5I_dec_ref(tmp_sid);
+        if(tmp_did >= 0)
+                H5I_dec_ref(tmp_did);
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5T_register() */
+} /* end H5T__register() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tregister
+ * Function:    H5Tregister
  *
- * Purpose:	Register a hard or soft conversion function for a data type
- *		conversion path.  The path is specified by the source and
- *		destination data types SRC_ID and DST_ID (for soft functions
- *		only the class of these types is important). If FUNC is a
- *		hard function then it replaces any previous path; if it's a
- *		soft function then it replaces all existing paths to which it
- *		applies and is used for any new path to which it applies as
- *		long as that path doesn't have a hard function.
+ * Purpose:    Register a hard or soft conversion function for a data type
+ *        conversion path.  The path is specified by the source and
+ *        destination data types SRC_ID and DST_ID (for soft functions
+ *        only the class of these types is important). If FUNC is a
+ *        hard function then it replaces any previous path; if it's a
+ *        soft function then it replaces all existing paths to which it
+ *        applies and is used for any new path to which it applies as
+ *        long as that path doesn't have a hard function.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		Friday, January	 9, 1998
+ * Programmer:    Robb Matzke
+ *        Friday, January     9, 1998
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Tregister(H5T_pers_t pers, const char *name, hid_t src_id, hid_t dst_id,
-	    H5T_conv_t func)
+    H5T_conv_t func)
 {
-    H5T_t	*src;		        /*source data type descriptor	*/
-    H5T_t	*dst;		        /*destination data type desc	*/
-    herr_t	ret_value = SUCCEED;	/*return value			*/
+    H5T_t     *src;                  /*source data type descriptor    */
+    H5T_t     *dst;                  /*destination data type desc     */
+    H5T_conv_func_t conv_func;       /* Conversion function wrapper */
+    herr_t    ret_value = SUCCEED;   /*return value                   */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE5("e", "Te*siix", pers, name, src_id, dst_id, func);
 
     /* Check args */
     if(H5T_PERS_HARD != pers && H5T_PERS_SOFT != pers)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid function persistence")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid function persistence")
     if(!name || !*name)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "conversion must have a name for debugging")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "conversion must have a name for debugging")
     if(NULL == (src = (H5T_t *)H5I_object_verify(src_id,H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
     if(NULL == (dst = (H5T_t *)H5I_object_verify(dst_id,H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
     if(!func)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no conversion function specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no conversion function specified")
+
+    /* Set up conversion function wrapper */
+    conv_func.is_app = TRUE;
+    conv_func.u.app_func = func;
 
     /* Go register the function */
-    if(H5T_register(pers, name, src, dst, func, H5AC_noio_dxpl_id, TRUE) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "can't register conversion function")
+    if(H5T__register(pers, name, src, dst, &conv_func) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "can't register conversion function")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2469,34 +2550,30 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_unregister
- *
- * Purpose:	Removes conversion paths that match the specified criteria.
- *		All arguments are optional. Missing arguments are wild cards.
- *		The special no-op path cannot be removed.
+ * Function:   H5T__unregister
  *
- * Return:	Succeess:	non-negative
+ * Purpose:    Removes conversion paths that match the specified criteria.
+ *        All arguments are optional. Missing arguments are wild cards.
+ *        The special no-op path cannot be removed.
  *
- * 		Failure:	negative
+ * Return:    Succeess:    non-negative
+ *            Failure:    negative
  *
- * Programmer:	Robb Matzke
- *		Tuesday, January 13, 1998
- *
- * Modifications:
- *      Adapted to non-API function - QAK, 11/17/99
+ * Programmer:    Robb Matzke
+ *        Tuesday, January 13, 1998
  *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_unregister(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
-	      H5T_conv_t func, hid_t dxpl_id)
+H5T__unregister(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
+    H5T_conv_t func)
 {
-    H5T_path_t	*path = NULL;		/*conversion path		*/
-    H5T_soft_t	*soft = NULL;		/*soft conversion information	*/
-    int	nprint = 0;		/*number of paths shut down	*/
-    int	i;			/*counter			*/
+    H5T_path_t    *path = NULL;     /*conversion path             */
+    H5T_soft_t    *soft = NULL;     /*soft conversion information */
+    int           nprint = 0;       /*number of paths shut down   */
+    int           i;                /*counter                     */
 
-    FUNC_ENTER_NOAPI_NOINIT_NOERR
+    FUNC_ENTER_STATIC_NOERR
 
     /* Remove matching entries from the soft list */
     if(H5T_PERS_DONTCARE == pers || H5T_PERS_SOFT == pers) {
@@ -2509,7 +2586,7 @@ H5T_unregister(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
                 continue;
             if(dst && dst->shared->type != soft->dst)
                 continue;
-            if(func && func != soft->func)
+            if(func && func != soft->conv.u.app_func)
                 continue;
 
             HDmemmove(H5T_g.soft + i, H5T_g.soft + i + 1, (size_t)(H5T_g.nsoft - (i + 1)) * sizeof(H5T_soft_t));
@@ -2528,7 +2605,7 @@ H5T_unregister(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
                 (name && *name && HDstrcmp(name, path->name)) ||
                 (src && H5T_cmp(src, path->src, FALSE)) ||
                 (dst && H5T_cmp(dst, path->dst, FALSE)) ||
-                (func && func!=path->func)) {
+                (func && func != path->conv.u.app_func)) {
             /*
              * Notify all other functions to recalculate private data since some
              * functions might cache a list of conversion functions.  For
@@ -2546,49 +2623,58 @@ H5T_unregister(H5T_pers_t pers, const char *name, H5T_t *src, H5T_t *dst,
             /* Shut down path */
             H5T__print_stats(path, &nprint);
             path->cdata.command = H5T_CONV_FREE;
-            if((path->func)((hid_t)FAIL, (hid_t)FAIL, &(path->cdata),
-                    (size_t)0, (size_t)0, (size_t)0, NULL, NULL, dxpl_id) < 0) {
+            if(path->conv.is_app) {
+                if((path->conv.u.app_func)((hid_t)FAIL, (hid_t)FAIL, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, H5CX_get_dxpl()) < 0) {
 #ifdef H5T_DEBUG
-                if(H5DEBUG(T)) {
-                    fprintf(H5DEBUG(T), "H5T: conversion function 0x%08lx failed "
-                            "to free private data for %s (ignored)\n",
-                            (unsigned long)(path->func), path->name);
-                }
+                    if(H5DEBUG(T))
+                        fprintf(H5DEBUG(T), "H5T: conversion function 0x%08lx failed "
+                                "to free private data for %s (ignored)\n",
+                                (unsigned long)(path->conv.u.app_func), path->name);
 #endif
-            }
-            H5T_close(path->src);
-            H5T_close(path->dst);
+                } /* end if */
+            } /* end if */
+            else
+                if((path->conv.u.lib_func)((hid_t)FAIL, (hid_t)FAIL, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0) {
+#ifdef H5T_DEBUG
+                    if(H5DEBUG(T))
+                        fprintf(H5DEBUG(T), "H5T: conversion function 0x%08lx failed "
+                                "to free private data for %s (ignored)\n",
+                                (unsigned long)(path->conv.u.lib_func), path->name);
+#endif
+                } /* end if */
+            (void)H5T_close_real(path->src);
+            (void)H5T_close_real(path->dst);
             path = H5FL_FREE(H5T_path_t, path);
             H5E_clear_stack(NULL); /*ignore all shutdown errors*/
         } /* end else */
     } /* end for */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
-} /* end H5T_unregister() */
+} /* end H5T__unregister() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tunregister
+ * Function:  H5Tunregister
  *
- * Purpose:	Removes conversion paths that match the specified criteria.
- *		All arguments are optional. Missing arguments are wild cards.
- *		The special no-op path cannot be removed.
+ * Purpose:   Removes conversion paths that match the specified criteria.
+ *        All arguments are optional. Missing arguments are wild cards.
+ *        The special no-op path cannot be removed.
  *
- * Return:	Succeess:	non-negative
+ * Return:    Succeess:    non-negative
  *
- * 		Failure:	negative
+ *            Failure:    negative
  *
- * Programmer:	Robb Matzke
- *		Tuesday, January 13, 1998
+ * Programmer:    Robb Matzke
+ *        Tuesday, January 13, 1998
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Tunregister(H5T_pers_t pers, const char *name, hid_t src_id, hid_t dst_id,
-	      H5T_conv_t func)
+    H5T_conv_t func)
 {
-    H5T_t	*src = NULL, *dst = NULL;	/* Datatype descriptors	*/
-    herr_t      ret_value = SUCCEED;            /* Return value */
+    H5T_t       *src = NULL, *dst = NULL;    /* Datatype descriptors */
+    herr_t      ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE5("e", "Te*siix", pers, name, src_id, dst_id, func);
@@ -2599,7 +2685,7 @@ H5Tunregister(H5T_pers_t pers, const char *name, hid_t src_id, hid_t dst_id,
     if(dst_id > 0 && (NULL == (dst = (H5T_t *)H5I_object_verify(dst_id, H5I_DATATYPE))))
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "dst is not a data type")
 
-    if(H5T_unregister(pers, name, src, dst, func, H5AC_noio_dxpl_id) < 0)
+    if(H5T__unregister(pers, name, src, dst, func) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDELETE, FAIL, "internal unregister function failed")
 
 done:
@@ -2608,29 +2694,29 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tfind
+ * Function:  H5Tfind
  *
- * Purpose:	Finds a conversion function that can handle a conversion from
- *		type SRC_ID to type DST_ID.  The PCDATA argument is a pointer
- *		to a pointer to type conversion data which was created and
- *		initialized by the type conversion function of this path
- *		when the conversion function was installed on the path.
+ * Purpose:   Finds a conversion function that can handle a conversion from
+ *        type SRC_ID to type DST_ID.  The PCDATA argument is a pointer
+ *        to a pointer to type conversion data which was created and
+ *        initialized by the type conversion function of this path
+ *        when the conversion function was installed on the path.
  *
- * Return:	Success:	A pointer to a suitable conversion function.
+ * Return:    Success:    A pointer to a suitable conversion function.
  *
- *		Failure:	NULL
+ *            Failure:    NULL
  *
- * Programmer:	Robb Matzke
- *		Tuesday, January 13, 1998
+ * Programmer:    Robb Matzke
+ *        Tuesday, January 13, 1998
  *
  *-------------------------------------------------------------------------
  */
 H5T_conv_t
 H5Tfind(hid_t src_id, hid_t dst_id, H5T_cdata_t **pcdata)
 {
-    H5T_t	*src, *dst;
-    H5T_path_t	*path;
-    H5T_conv_t	ret_value;      /* Return value */
+    H5T_t         *src, *dst;
+    H5T_path_t    *path;
+    H5T_conv_t    ret_value;      /* Return value */
 
     FUNC_ENTER_API(NULL)
     H5TRACE3("x", "ii**x", src_id, dst_id, pcdata);
@@ -2638,19 +2724,19 @@ H5Tfind(hid_t src_id, hid_t dst_id, H5T_cdata_t **pcdata)
     /* Check args */
     if(NULL == (src = (H5T_t *)H5I_object_verify(src_id, H5I_DATATYPE)) ||
             NULL == (dst = (H5T_t *)H5I_object_verify(dst_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a data type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "not a data type")
     if(!pcdata)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "no address to receive cdata pointer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, NULL, "no address to receive cdata pointer")
 
     /* Find it */
-    if(NULL == (path = H5T_path_find(src, dst, NULL, NULL, H5AC_noio_dxpl_id, FALSE)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, NULL, "conversion function not found")
+    if(NULL == (path = H5T_path_find(src, dst)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, NULL, "conversion function not found")
 
     if(pcdata)
         *pcdata = &(path->cdata);
 
     /* Set return value */
-    ret_value = path->func;
+    ret_value = path->conv.u.app_func;
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2658,27 +2744,27 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tcompiler_conv
+ * Function:  H5Tcompiler_conv
  *
- * Purpose:	Finds out whether the library's conversion function from
- *              type src_id to type dst_id is a compiler (hard) conversion.
- *              A hard conversion uses compiler's casting; a soft conversion
- *              uses the library's own conversion function.
+ * Purpose:   Finds out whether the library's conversion function from
+ *            type src_id to type dst_id is a compiler (hard) conversion.
+ *            A hard conversion uses compiler's casting; a soft conversion
+ *            uses the library's own conversion function.
  *
- * Return:	TRUE:           hard conversion.
- *		FALSE:          soft conversion.
- *		FAIL:           failed.
+ * Return:    TRUE:           hard conversion.
+ *            FALSE:          soft conversion.
+ *            FAIL:           failed.
  *
- * Programmer:	Raymond Lu
- *		Friday, Sept 2, 2005
+ * Programmer:    Raymond Lu
+ *        Friday, Sept 2, 2005
  *
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Tcompiler_conv(hid_t src_id, hid_t dst_id)
 {
-    H5T_t	*src, *dst;
-    htri_t	ret_value;      /* Return value */
+    H5T_t     *src, *dst;
+    htri_t    ret_value;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE2("t", "ii", src_id, dst_id);
@@ -2686,11 +2772,11 @@ H5Tcompiler_conv(hid_t src_id, hid_t dst_id)
     /* Check args */
     if(NULL == (src = (H5T_t *)H5I_object_verify(src_id, H5I_DATATYPE)) ||
             NULL == (dst = (H5T_t *)H5I_object_verify(dst_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
 
     /* Find it */
-    if((ret_value = H5T_compiler_conv(src, dst)) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "conversion function not found")
+    if((ret_value = H5T__compiler_conv(src, dst)) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "conversion function not found")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2698,35 +2784,35 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tconvert
- *
- * Purpose:	Convert NELMTS elements from type SRC_ID to type DST_ID.  The
- *		source elements are packed in BUF and on return the
- *		destination will be packed in BUF.  That is, the conversion
- *		is performed in place.  The optional background buffer is an
- *		array of NELMTS values of destination type which are merged
- *		with the converted values to fill in cracks (for instance,
- *		BACKGROUND might be an array of structs with the `a' and `b'
- *		fields already initialized and the conversion of BUF supplies
- *		the `c' and `d' field values).  The PLIST_ID a dataset transfer
- *      property list which is passed to the conversion functions.  (It's
- *      currently only used to pass along the VL datatype custom allocation
- *      information -QAK 7/1/99)
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
+ * Function:  H5Tconvert
+ *
+ * Purpose:   Convert NELMTS elements from type SRC_ID to type DST_ID.  The
+ *        source elements are packed in BUF and on return the
+ *        destination will be packed in BUF.  That is, the conversion
+ *        is performed in place.  The optional background buffer is an
+ *        array of NELMTS values of destination type which are merged
+ *        with the converted values to fill in cracks (for instance,
+ *        BACKGROUND might be an array of structs with the `a' and `b'
+ *        fields already initialized and the conversion of BUF supplies
+ *        the `c' and `d' field values).  The PLIST_ID a dataset transfer
+ *        property list which is passed to the conversion functions.  (It's
+ *        currently only used to pass along the VL datatype custom allocation
+ *        information -QAK 7/1/99)
+ *
+ * Return:    Non-negative on success/Negative on failure
+ *
+ * Programmer:    Robb Matzke
  *              Wednesday, June 10, 1998
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Tconvert(hid_t src_id, hid_t dst_id, size_t nelmts, void *buf,
-	    void *background, hid_t dxpl_id)
+        void *background, hid_t dxpl_id)
 {
-    H5T_path_t	*tpath;			/*type conversion info	*/
-    H5T_t	*src, *dst;		/*unatomized types	*/
-    herr_t      ret_value = SUCCEED;    /* Return value */
+    H5T_path_t    *tpath;                 /* type conversion info    */
+    H5T_t         *src, *dst;             /* unatomized types        */
+    herr_t        ret_value = SUCCEED;    /* Return value            */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE6("e", "iiz*x*xi", src_id, dst_id, nelmts, buf, background, dxpl_id);
@@ -2734,18 +2820,21 @@ H5Tconvert(hid_t src_id, hid_t dst_id, size_t nelmts, void *buf,
     /* Check args */
     if(NULL == (src = (H5T_t *)H5I_object_verify(src_id, H5I_DATATYPE)) ||
             NULL == (dst = (H5T_t *)H5I_object_verify(dst_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
     if(H5P_DEFAULT == dxpl_id)
         dxpl_id = H5P_DATASET_XFER_DEFAULT;
     else
         if(TRUE != H5P_isa_class(dxpl_id, H5P_DATASET_XFER))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not dataset transfer property list")
 
+    /* Set DXPL for operation */
+    H5CX_set_dxpl(dxpl_id);
+
     /* Find the conversion function */
-    if(NULL == (tpath = H5T_path_find(src, dst, NULL, NULL, dxpl_id, FALSE)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert between src and dst data types")
+    if(NULL == (tpath = H5T_path_find(src, dst)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert between src and dst data types")
 
-    if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, buf, background, dxpl_id) < 0)
+    if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, buf, background) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "data type conversion failed")
 
 done:
@@ -2754,17 +2843,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tencode
+ * Function:  H5Tencode
  *
- * Purpose:	Given an datatype ID, converts the object description into
- *              binary in a buffer.
+ * Purpose:   Given an datatype ID, converts the object description into
+ *            binary in a buffer.
  *
- * Return:	Success:	non-negative
+ * Return:    Success:    non-negative
  *
- *		Failure:	negative
+ *            Failure:    negative
  *
- * Programmer:	Raymond Lu
- *              slu@ncsa.uiuc.edu
+ * Programmer:    Raymond Lu
  *              July 14, 2004
  *
  *-------------------------------------------------------------------------
@@ -2780,13 +2868,13 @@ H5Tencode(hid_t obj_id, void *buf, size_t *nalloc)
 
     /* Check argument and retrieve object */
     if(NULL == (dtype = (H5T_t *)H5I_object_verify(obj_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
     if(nalloc == NULL)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL pointer for buffer size")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "NULL pointer for buffer size")
 
     /* Go encode the datatype */
     if(H5T_encode(dtype, (unsigned char *)buf, nalloc) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTENCODE, FAIL, "can't encode datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTENCODE, FAIL, "can't encode datatype")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2794,24 +2882,22 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Tdecode
+ * Function:  H5Tdecode
  *
- * Purpose:	Decode a binary object description and return a new object
- *              handle.
+ * Purpose:   Decode a binary object description and return a new object
+ *            handle.
  *
- * Return:	Success:	datatype ID(non-negative)
+ * Return:    Success:    datatype ID(non-negative)
  *
- *		Failure:	negative
+ *            Failure:    negative
  *
- * Programmer:	Raymond Lu
- *              slu@ncsa.uiuc.edu
+ * Programmer:    Raymond Lu
  *              July 14, 2004
  *
  * Modification:Raymond Lu
- *              songyulu@hdfgroup.org
  *              17 February 2011
  *              I changed the value for the APP_REF parameter of H5I_register
- *              from FALSE to TRUE. 
+ *              from FALSE to TRUE.
  *-------------------------------------------------------------------------
  */
 hid_t
@@ -2825,15 +2911,20 @@ H5Tdecode(const void *buf)
 
     /* Check args */
     if(buf == NULL)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "empty buffer")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "empty buffer")
 
-    /* Create datatype by decoding buffer */
-    if(NULL == (dt = H5T_decode((const unsigned char *)buf)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDECODE, FAIL, "can't decode object")
+    /* Create datatype by decoding buffer
+     * There is no way to get the size of the buffer, so we pass in
+     * SIZE_MAX and assume the caller knows what they are doing.
+     * Really fixing this will require an H5Tdecode2() call that
+     * takes a size parameter.
+     */
+    if(NULL == (dt = H5T_decode(SIZE_MAX, (const unsigned char *)buf)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDECODE, FAIL, "can't decode object")
 
     /* Register the type and return the ID */
     if((ret_value = H5I_register(H5I_DATATYPE, dt, TRUE)) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register data type")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register data type")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -2846,17 +2937,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_encode
+ * Function:  H5T_encode
  *
- * Purpose:	Private function for H5Tencode.  Converts an object
- *              description into binary in a buffer.
+ * Purpose:   Private function for H5Tencode.  Converts an object
+ *            description into binary in a buffer.
  *
- * Return:	Success:	non-negative
+ * Return:    Success:    non-negative
  *
- *		Failure:	negative
+ *            Failure:    negative
  *
- * Programmer:	Raymond Lu
- *              slu@ncsa.uiuc.edu
+ * Programmer:    Raymond Lu
  *              July 14, 2004
  *
  *-------------------------------------------------------------------------
@@ -2872,11 +2962,11 @@ H5T_encode(H5T_t *obj, unsigned char *buf, size_t *nalloc)
 
     /* Allocate "fake" file structure */
     if(NULL == (f = H5F_fake_alloc((uint8_t)0)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "can't allocate fake file struct")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, FAIL, "can't allocate fake file struct")
 
     /* Find out the size of buffer needed */
     if((buf_size = H5O_msg_raw_size(f, H5O_DTYPE_ID, TRUE, obj)) == 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_BADSIZE, FAIL, "can't find datatype size")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_BADSIZE, FAIL, "can't find datatype size")
 
     /* Don't encode if buffer size isn't big enough or buffer is empty */
     if(!buf || *nalloc < (buf_size + 1 + 1))
@@ -2903,23 +2993,22 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_decode
+ * Function:  H5T_decode
  *
- * Purpose:	Private function for H5Tdecode.  Reconstructs a binary
- *              description of datatype and returns a new object handle.
+ * Purpose:   Private function for H5Tdecode.  Reconstructs a binary
+ *            description of datatype and returns a new object handle.
  *
- * Return:	Success:	datatype ID(non-negative)
+ * Return:    Success:    datatype ID(non-negative)
  *
- *		Failure:	negative
+ *            Failure:    negative
  *
- * Programmer:	Raymond Lu
- *              slu@ncsa.uiuc.edu
+ * Programmer:    Raymond Lu
  *              July 14, 2004
  *
  *-------------------------------------------------------------------------
  */
 H5T_t *
-H5T_decode(const unsigned char *buf)
+H5T_decode(size_t buf_size, const unsigned char *buf)
 {
     H5F_t *f = NULL;            /* Fake file structure*/
     H5T_t *ret_value = NULL;    /* Return value */
@@ -2928,19 +3017,19 @@ H5T_decode(const unsigned char *buf)
 
     /* Allocate "fake" file structure */
     if(NULL == (f = H5F_fake_alloc((uint8_t)0)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, NULL, "can't allocate fake file struct")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTALLOC, NULL, "can't allocate fake file struct")
 
     /* Decode the type of the information */
     if(*buf++ != H5O_DTYPE_ID)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_BADMESG, NULL, "not an encoded datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_BADMESG, NULL, "not an encoded datatype")
 
     /* Decode the version of the datatype information */
     if(*buf++ != H5T_ENCODE_VERSION)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_VERSION, NULL, "unknown version of encoded datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_VERSION, NULL, "unknown version of encoded datatype")
 
     /* Decode the serialized datatype message */
-    if(NULL == (ret_value = (H5T_t *)H5O_msg_decode(f, H5AC_noio_dxpl_id, NULL, H5O_DTYPE_ID, buf)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDECODE, NULL, "can't decode object")
+    if(NULL == (ret_value = (H5T_t *)H5O_msg_decode(f, NULL, H5O_DTYPE_ID, buf_size, buf)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDECODE, NULL, "can't decode object")
 
     /* Mark datatype as being in memory now */
     if(H5T_set_loc(ret_value, NULL, H5T_LOC_MEMORY) < 0)
@@ -2956,18 +3045,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__create
+ * Function:  H5T__create
  *
- * Purpose:	Creates a new data type and initializes it to reasonable
- *		values.	 The new data type is SIZE bytes and an instance of
- *		the class TYPE.
+ * Purpose:   Creates a new data type and initializes it to reasonable
+ *            values.     The new data type is SIZE bytes and an instance of
+ *            the class TYPE.
  *
- * Return:	Success:	Pointer to the new type.
+ * Return:    Success:    Pointer to the new type.
  *
- *		Failure:	NULL
+ *            Failure:    NULL
  *
- * Programmer:	Robb Matzke
- *		Friday, December  5, 1997
+ * Programmer:    Robb Matzke
+ *        Friday, December  5, 1997
  *
  * Modifications:
  *              Raymond Lu
@@ -2991,16 +3080,16 @@ H5T__create(H5T_class_t type, size_t size)
             {
                 H5T_t *origin_dt = NULL;
 
-		if(NULL == (origin_dt = (H5T_t *)H5I_object(H5T_C_S1)))
-		    HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, NULL, "can't get structure for string type")
+                if(NULL == (origin_dt = (H5T_t *)H5I_object(H5T_C_S1)))
+                    HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, NULL, "can't get structure for string type")
 
-		/* Copy the default string datatype */
-		if(NULL == (dt = H5T_copy(origin_dt, H5T_COPY_TRANSIENT)))
-		    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy");
+                /* Copy the default string datatype */
+                if(NULL == (dt = H5T_copy(origin_dt, H5T_COPY_TRANSIENT)))
+                    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy");
 
-		/* Modify the datatype */
-		if(H5T_set_size(dt, size) < 0)
-		    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to set size for string type")
+                /* Modify the datatype */
+                if(H5T__set_size(dt, size) < 0)
+                    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to set size for string type")
             }
             break;
 
@@ -3085,35 +3174,35 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_copy
+ * Function:  H5T_copy
  *
- * Purpose:	Copies datatype OLD_DT.	 The resulting data type is not
- *		locked and is a transient type.
+ * Purpose:   Copies datatype OLD_DT.     The resulting data type is not
+ *            locked and is a transient type.
  *
- * Return:	Success:	Pointer to a new copy of the OLD_DT argument.
+ * Return:    Success:    Pointer to a new copy of the OLD_DT argument.
  *
- *		Failure:	NULL
+ *            Failure:    NULL
  *
- * Programmer:	Robb Matzke
- *		Thursday, December  4, 1997
+ * Programmer:    Robb Matzke
+ *        Thursday, December  4, 1997
  *
  * Modifications:
  *
- * 	Robb Matzke, 4 Jun 1998
- *	Added the METHOD argument.  If it's H5T_COPY_TRANSIENT then the
- *	result will be an unlocked transient type.  Otherwise if it's
- *	H5T_COPY_ALL then the result is a named type if the original is a
- *	named type, but the result is not opened.  Finally, if it's
- *	H5T_COPY_REOPEN and the original type is a named type then the result
- *	is a named type and the type object header is opened again.  The
- *	H5T_COPY_REOPEN method is used when returning a named type to the
- *	application.
+ *     Robb Matzke, 4 Jun 1998
+ *    Added the METHOD argument.  If it's H5T_COPY_TRANSIENT then the
+ *    result will be an unlocked transient type.  Otherwise if it's
+ *    H5T_COPY_ALL then the result is a named type if the original is a
+ *    named type, but the result is not opened.  Finally, if it's
+ *    H5T_COPY_REOPEN and the original type is a named type then the result
+ *    is a named type and the type object header is opened again.  The
+ *    H5T_COPY_REOPEN method is used when returning a named type to the
+ *    application.
  *
- * 	Robb Matzke, 22 Dec 1998
- *	Now able to copy enumeration data types.
+ *     Robb Matzke, 22 Dec 1998
+ *    Now able to copy enumeration data types.
  *
  *      Robb Matzke, 20 May 1999
- *	Now able to copy opaque types.
+ *    Now able to copy opaque types.
  *
  *      Pedro Vicente, <pvn@ncsa.uiuc.edu> 21 Sep 2002
  *      Added a deep copy of the symbol table entry
@@ -3123,11 +3212,11 @@ done:
 H5T_t *
 H5T_copy(H5T_t *old_dt, H5T_copy_t method)
 {
-    H5T_t	*new_dt = NULL, *tmp = NULL;
+    H5T_t           *new_dt = NULL, *tmp = NULL;
     H5T_shared_t    *reopened_fo = NULL;
-    unsigned	i;
-    char	*s;
-    H5T_t       *ret_value = NULL;    /* Return value */
+    unsigned        i;
+    char            *s;
+    H5T_t           *ret_value = NULL;    /* Return value */
 
     FUNC_ENTER_NOAPI(NULL)
 
@@ -3209,7 +3298,8 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
                         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINC, NULL, "can't increment object count")
                 } /* end else */
                 new_dt->shared->state = H5T_STATE_OPEN;
-            } else if(H5T_STATE_IMMUTABLE == old_dt->shared->state) {
+            }
+            else if(H5T_STATE_IMMUTABLE == old_dt->shared->state) {
                 new_dt->shared->state = H5T_STATE_RDONLY;
             }
             break;
@@ -3227,71 +3317,71 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
         switch(new_dt->shared->type) {
             case H5T_COMPOUND:
                 {
-                ssize_t accum_change = 0; /* Amount of change in the offset of the fields */
-
-                /*
-                * Copy all member fields to new type, then overwrite the
-                * name and type fields of each new member with copied values.
-                * That is, H5T_copy() is a deep copy.
-                */
-                /* Only malloc if space has been allocated for members - NAF */
-                if(new_dt->shared->u.compnd.nalloc > 0) {
-                    new_dt->shared->u.compnd.memb = (H5T_cmemb_t *)H5MM_malloc(new_dt->shared->u.compnd.nalloc *
-                                        sizeof(H5T_cmemb_t));
-                    if (NULL==new_dt->shared->u.compnd.memb)
-                        HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
-
-                    HDmemcpy(new_dt->shared->u.compnd.memb, old_dt->shared->u.compnd.memb,
-                        new_dt->shared->u.compnd.nmembs * sizeof(H5T_cmemb_t));
-                } /* end if */
-
-                for(i = 0; i < new_dt->shared->u.compnd.nmembs; i++) {
-                    unsigned	j;
-                    int    old_match;
-
-                    s = new_dt->shared->u.compnd.memb[i].name;
-                    new_dt->shared->u.compnd.memb[i].name = H5MM_xstrdup(s);
-                    tmp = H5T_copy (old_dt->shared->u.compnd.memb[i].type, method);
-                    new_dt->shared->u.compnd.memb[i].type = tmp;
-                    HDassert(tmp != NULL);
+                    ssize_t accum_change = 0; /* Amount of change in the offset of the fields */
 
-                    /* Range check against compound member's offset */
-                    if ((accum_change < 0) && ((ssize_t) new_dt->shared->u.compnd.memb[i].offset < accum_change))
-                        HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, NULL, "invalid field size in datatype");
-
-                    /* Apply the accumulated size change to the offset of the field */
-                    new_dt->shared->u.compnd.memb[i].offset += (size_t) accum_change;
-
-                    if(old_dt->shared->u.compnd.sorted != H5T_SORT_VALUE) {
-                        for(old_match = -1, j = 0; j < old_dt->shared->u.compnd.nmembs; j++) {
-                            if(!HDstrcmp(new_dt->shared->u.compnd.memb[i].name, old_dt->shared->u.compnd.memb[j].name)) {
-                                old_match = (int) j;
-                                break;
-                            } /* end if */
-                        } /* end for */
-
-                        /* check if we couldn't find a match */
-                        if(old_match < 0)
-                            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCOPY, NULL, "fields in datatype corrupted");
+                    /*
+                    * Copy all member fields to new type, then overwrite the
+                    * name and type fields of each new member with copied values.
+                    * That is, H5T_copy() is a deep copy.
+                    */
+                    /* Only malloc if space has been allocated for members - NAF */
+                    if(new_dt->shared->u.compnd.nalloc > 0) {
+                        new_dt->shared->u.compnd.memb =
+                                (H5T_cmemb_t *)H5MM_malloc(new_dt->shared->u.compnd.nalloc * sizeof(H5T_cmemb_t));
+                        if (NULL == new_dt->shared->u.compnd.memb)
+                            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
+
+                        HDmemcpy(new_dt->shared->u.compnd.memb, old_dt->shared->u.compnd.memb,
+                                new_dt->shared->u.compnd.nmembs * sizeof(H5T_cmemb_t));
                     } /* end if */
-                    else
-                        old_match = (int) i;
 
-                    /* If the field changed size, add that change to the accumulated size change */
-                    if(new_dt->shared->u.compnd.memb[i].type->shared->size != old_dt->shared->u.compnd.memb[old_match].type->shared->size) {
-                        /* Adjust the size of the member */
-                        new_dt->shared->u.compnd.memb[i].size = (old_dt->shared->u.compnd.memb[old_match].size*tmp->shared->size)/old_dt->shared->u.compnd.memb[old_match].type->shared->size;
+                    for(i = 0; i < new_dt->shared->u.compnd.nmembs; i++) {
+                        unsigned    j;
+                        int         old_match;
+
+                        s = new_dt->shared->u.compnd.memb[i].name;
+                        new_dt->shared->u.compnd.memb[i].name = H5MM_xstrdup(s);
+                        tmp = H5T_copy (old_dt->shared->u.compnd.memb[i].type, method);
+                        new_dt->shared->u.compnd.memb[i].type = tmp;
+                        HDassert(tmp != NULL);
+
+                        /* Range check against compound member's offset */
+                        if ((accum_change < 0) && ((ssize_t) new_dt->shared->u.compnd.memb[i].offset < accum_change))
+                            HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, NULL, "invalid field size in datatype");
+
+                        /* Apply the accumulated size change to the offset of the field */
+                        new_dt->shared->u.compnd.memb[i].offset += (size_t) accum_change;
+
+                        if(old_dt->shared->u.compnd.sorted != H5T_SORT_VALUE) {
+                            for(old_match = -1, j = 0; j < old_dt->shared->u.compnd.nmembs; j++) {
+                                if(!HDstrcmp(new_dt->shared->u.compnd.memb[i].name, old_dt->shared->u.compnd.memb[j].name)) {
+                                    old_match = (int) j;
+                                    break;
+                                } /* end if */
+                            } /* end for */
+
+                            /* check if we couldn't find a match */
+                            if(old_match < 0)
+                                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCOPY, NULL, "fields in datatype corrupted");
+                        } /* end if */
+                        else
+                            old_match = (int) i;
 
-                        accum_change += (ssize_t) (new_dt->shared->u.compnd.memb[i].type->shared->size - old_dt->shared->u.compnd.memb[old_match].type->shared->size);
-                    } /* end if */
-                } /* end for */
+                        /* If the field changed size, add that change to the accumulated size change */
+                        if(new_dt->shared->u.compnd.memb[i].type->shared->size != old_dt->shared->u.compnd.memb[old_match].type->shared->size) {
+                            /* Adjust the size of the member */
+                            new_dt->shared->u.compnd.memb[i].size = (old_dt->shared->u.compnd.memb[old_match].size*tmp->shared->size)/old_dt->shared->u.compnd.memb[old_match].type->shared->size;
+
+                            accum_change += (ssize_t) (new_dt->shared->u.compnd.memb[i].type->shared->size - old_dt->shared->u.compnd.memb[old_match].type->shared->size);
+                        } /* end if */
+                    } /* end for */
 
-                /* Range check against datatype size */
-                if ((accum_change < 0) && ((ssize_t) new_dt->shared->size < accum_change))
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, NULL, "invalid field size in datatype");
+                    /* Range check against datatype size */
+                    if ((accum_change < 0) && ((ssize_t) new_dt->shared->size < accum_change))
+                        HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, NULL, "invalid field size in datatype");
 
-                /* Apply the accumulated size change to the size of the compound struct */
-                new_dt->shared->size += (size_t) accum_change;
+                    /* Apply the accumulated size change to the size of the compound struct */
+                    new_dt->shared->size += (size_t) accum_change;
                 }
                 break;
 
@@ -3301,14 +3391,14 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
                 * of each new member with copied values. That is, H5T_copy() is a
                 * deep copy.
                 */
-                new_dt->shared->u.enumer.name = (char **)H5MM_malloc(new_dt->shared->u.enumer.nalloc *
-                                    sizeof(char*));
-                new_dt->shared->u.enumer.value = (uint8_t *)H5MM_malloc(new_dt->shared->u.enumer.nalloc *
-                                    new_dt->shared->size);
+                new_dt->shared->u.enumer.name =
+                        (char **)H5MM_malloc(new_dt->shared->u.enumer.nalloc * sizeof(char*));
+                new_dt->shared->u.enumer.value =
+                        (uint8_t *)H5MM_malloc(new_dt->shared->u.enumer.nalloc * new_dt->shared->size);
                 if(NULL == new_dt->shared->u.enumer.value)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed");
                 HDmemcpy(new_dt->shared->u.enumer.value, old_dt->shared->u.enumer.value,
-                    new_dt->shared->u.enumer.nmembs * new_dt->shared->size);
+                        new_dt->shared->u.enumer.nmembs * new_dt->shared->size);
                 for(i = 0; i < new_dt->shared->u.enumer.nmembs; i++) {
                     s = old_dt->shared->u.enumer.name[i];
                     new_dt->shared->u.enumer.name[i] = H5MM_xstrdup(s);
@@ -3392,22 +3482,19 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_lock
+ * Function:  H5T_lock
  *
- * Purpose:	Lock a transient data type making it read-only.  If IMMUTABLE
- *		is set then the type cannot be closed except when the library
- *		itself closes.
+ * Purpose:   Lock a transient data type making it read-only.  If IMMUTABLE
+ *        is set then the type cannot be closed except when the library
+ *        itself closes.
  *
- *		This function is a no-op if the type is not transient or if
- *		the type is already read-only or immutable.
+ *        This function is a no-op if the type is not transient or if
+ *        the type is already read-only or immutable.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Thursday, June  4, 1998
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -3441,14 +3528,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__alloc
+ * Function:  H5T__alloc
  *
- * Purpose:	Allocates a new H5T_t structure, initializing it correctly.
+ * Purpose:   Allocates a new H5T_t structure, initializing it correctly.
  *
- * Return:	Pointer to new H5T_t on success/NULL on failure
+ * Return:    Pointer to new H5T_t on success/NULL on failure
  *
- * Programmer:	Quincey Koziol
- *		Monday, August 29, 2005
+ * Programmer:    Quincey Koziol
+ *        Monday, August 29, 2005
  *
  *-------------------------------------------------------------------------
  */
@@ -3488,48 +3575,29 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__free
+ * Function:  H5T__free
  *
- * Purpose:	Frees all memory associated with a datatype, but does not
- *              free the H5T_t or H5T_shared_t structures (which should
- *              be done in H5T_close).
+ * Purpose:   Frees all memory associated with a datatype, but does not
+ *            free the H5T_t or H5T_shared_t structures (which should
+ *            be done in H5T_close / H5T_close_real).
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Quincey Koziol
- *		Monday, January  6, 2003
+ * Programmer:    Quincey Koziol
+ *        Monday, January  6, 2003
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__free(H5T_t *dt)
 {
-    unsigned	i;
+    unsigned    i;
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_PACKAGE
 
     HDassert(dt && dt->shared);
 
-    /*
-     * If a named type is being closed then close the object header and
-     * remove from the list of open objects in the file.
-     */
-    if(H5T_STATE_OPEN == dt->shared->state) {
-        HDassert(dt->sh_loc.type == H5O_SHARE_TYPE_COMMITTED);
-        HDassert(H5F_addr_defined(dt->sh_loc.u.loc.oh_addr));
-        HDassert(H5F_addr_defined(dt->oloc.addr));
-
-        /* Remove the datatype from the list of opened objects in the file */
-        if(H5FO_top_decr(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) < 0)
-            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "can't decrement count for object")
-        if(H5FO_delete(dt->sh_loc.file, H5AC_ind_read_dxpl_id, dt->sh_loc.u.loc.oh_addr) < 0)
-            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "can't remove datatype from list of open objects")
-        if(H5O_close(&dt->oloc, NULL) < 0)
-            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to close data type object header")
-        dt->shared->state = H5T_STATE_NAMED;
-    } /* end if */
-
     /* Free the ID to name info */
     H5G_name_free(&(dt->path));
 
@@ -3537,14 +3605,14 @@ H5T__free(H5T_t *dt)
      * Don't free locked datatypes.
      */
     if(H5T_STATE_IMMUTABLE==dt->shared->state)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, FAIL, "unable to close immutable datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, FAIL, "unable to close immutable datatype")
 
     /* Close the datatype */
     switch(dt->shared->type) {
         case H5T_COMPOUND:
             for(i = 0; i < dt->shared->u.compnd.nmembs; i++) {
                 dt->shared->u.compnd.memb[i].name = (char *)H5MM_xfree(dt->shared->u.compnd.memb[i].name);
-                H5T_close(dt->shared->u.compnd.memb[i].type);
+                (void)H5T_close_real(dt->shared->u.compnd.memb[i].type);
             } /* end for */
             dt->shared->u.compnd.memb = (H5T_cmemb_t *)H5MM_xfree(dt->shared->u.compnd.memb);
             dt->shared->u.compnd.nmembs = 0;
@@ -3579,8 +3647,8 @@ H5T__free(H5T_t *dt)
 
     /* Close the parent */
     HDassert(dt->shared->parent != dt);
-    if(dt->shared->parent && H5T_close(dt->shared->parent) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, FAIL, "unable to close parent data type")
+    if(dt->shared->parent && H5T_close_real(dt->shared->parent) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, FAIL, "unable to close parent data type")
     dt->shared->parent = NULL;
 
 done:
@@ -3589,59 +3657,140 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_close
+ * Function:  H5T_close_real
+ *
+ * Purpose:   Frees a datatype and all associated memory.
  *
- * Purpose:	Frees a data type and all associated memory.  If the data
- *		type is locked then nothing happens.
+ * Hote:      Does _not_ deal with open hamed datatypes, etc.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:    Non-negative on success/Negative on failure
  *
- * Programmer:	Robb Matzke
- *		Monday, December  8, 1997
+ * Programmer: Quincey Koziol
+ *             Monday, February 12, 2018
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5T_close(H5T_t *dt)
+H5T_close_real(H5T_t *dt)
 {
-    herr_t      ret_value = SUCCEED;   	/* Return value */
+    herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
+    /* Sanity check */
     HDassert(dt && dt->shared);
 
-    if(dt->shared->state == H5T_STATE_OPEN)
-        dt->shared->fo_count--;
-
-    if(dt->shared->state != H5T_STATE_OPEN || dt->shared->fo_count == 0) {
-	/* Uncork cache entries with object address tag for named datatype only */
-	if(dt->shared->state == H5T_STATE_OPEN && dt->shared->fo_count == 0) {
-            hbool_t 	corked;			/* Whether the named datatype is corked or not */
-
-	    if(H5AC_cork(dt->oloc.file, dt->oloc.addr, H5AC__GET_CORKED, &corked) < 0)
-		HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to retrieve an object's cork status")
-	    if(corked)
-		if(H5AC_cork(dt->oloc.file, dt->oloc.addr, H5AC__UNCORK, NULL) < 0)
-		    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTUNCORK, FAIL, "unable to uncork an object")
-	} /* end if */
-
+    /* Clean up resources, depending on shared state */
+    if(dt->shared->state != H5T_STATE_OPEN) {
         if(H5T__free(dt) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTFREE, FAIL, "unable to free datatype");
 
         dt->shared = H5FL_FREE(H5T_shared_t, dt->shared);
     } /* end if */
-    else {
+    else
+        /* Free the group hier. path since we're not calling H5T__free() */
+        H5G_name_free(&(dt->path));
+
+    /* Free the 'top' datatype struct */
+    dt = H5FL_FREE(H5T_t, dt);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5T_close_real() */
+
+
+/*-------------------------------------------------------------------------
+ * Function: H5T__close_cb
+ *
+ * Purpose:  Callback routine for closing a datatype ID.  Closes the datatype
+ *           object that was attached to the ID.
+ *
+ * Return:   Non-negative on success/Negative on failure
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5T__close_cb(H5T_t *dt)
+{
+    herr_t ret_value = SUCCEED;                 /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* check args */
+    HDassert(dt && dt->shared);
+
+    /* Call actual datatype close routine */
+    if(H5T_close(dt) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, FAIL, "can't close datatype");
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5T__close_cb() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  H5T_close
+ *
+ * Purpose:   Frees a data type and all associated memory.  Deals with
+ *            open named datatypes appropriately.
+ *
+ * Return:    Non-negative on success/Negative on failure
+ *
+ * Programmer:  Robb Matzke
+ *              Monday, December  8, 1997
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5T_close(H5T_t *dt)
+{
+    herr_t      ret_value = SUCCEED;       /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /* Sanity check */
+    HDassert(dt && dt->shared);
+
+    /* Named datatype cleanups */
+    if(dt->shared->state == H5T_STATE_OPEN) {
+        /* Decrement refcount count on open named datatype */
+        dt->shared->fo_count--;
+
+        /* Sanity checks */
+        HDassert(dt->sh_loc.type == H5O_SHARE_TYPE_COMMITTED);
+        HDassert(H5F_addr_defined(dt->sh_loc.u.loc.oh_addr));
+        HDassert(H5F_addr_defined(dt->oloc.addr));
+
         /*
          * If a named type is being closed then close the object header and
          * remove from the list of open objects in the file.
          */
-        if(H5T_STATE_OPEN == dt->shared->state) {
-            HDassert(dt->sh_loc.type == H5O_SHARE_TYPE_COMMITTED);
 
-            /* Decrement the ref. count for this object in the top file */
-            if(H5FO_top_decr(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) < 0)
-                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "can't decrement count for object")
+        /* Decrement the ref. count for this object in the top file */
+        if(H5FO_top_decr(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "can't decrement count for object")
 
+        /* Close things down if this is the last reference to the open named datatype */
+        if(0 == dt->shared->fo_count) {
+            hbool_t     corked;            /* Whether the named datatype is corked or not */
+
+            /* Uncork cache entries with object address tag for named datatype */
+            if(H5AC_cork(dt->oloc.file, dt->oloc.addr, H5AC__GET_CORKED, &corked) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to retrieve an object's cork status")
+            if(corked)
+                if(H5AC_cork(dt->oloc.file, dt->oloc.addr, H5AC__UNCORK, NULL) < 0)
+                    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTUNCORK, FAIL, "unable to uncork an object")
+
+            /* Remove the datatype from the list of opened objects in the file */
+            if(H5FO_delete(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "can't remove datatype from list of open objects")
+            if(H5O_close(&dt->oloc, NULL) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to close data type object header")
+
+            /* Mark named datatype closed now */
+            dt->shared->state = H5T_STATE_NAMED;
+        } /* end if */
+        else {
             /* Check reference count for this object in the top file */
             if(H5FO_top_count(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) == 0) {
                 /* Close object location for named datatype */
@@ -3649,18 +3798,15 @@ H5T_close(H5T_t *dt)
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to close")
             } /* end if */
             else
-                /* Free object location (i.e. "unhold" the file if appropriate)
-                 */
+                /* Free object location (i.e. "unhold" the file if appropriate) */
                 if(H5O_loc_free(&(dt->oloc)) < 0)
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "problem attempting to free location")
-        } /* end if */
-
-        /* Free the group hier. path since we're not calling H5T__free() */
-        H5G_name_free(&(dt->path));
-    } /* end else */
+        } /* end else */
+    } /* end if */
 
-    /* Free the datatype struct */
-    dt = H5FL_FREE(H5T_t, dt);
+    /* Clean up resources */
+    if(H5T_close_real(dt) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "unable to free datatype");
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -3668,42 +3814,38 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_set_size
+ * Function:    H5T__set_size
  *
- * Purpose:	Sets the total size in bytes for a data type (this operation
- *		is not permitted on reference data types).  If the size is
- *		decreased so that the significant bits of the data type
- *		extend beyond the edge of the new size, then the `offset'
- *		property is decreased toward zero.  If the `offset' becomes
- *		zero and the significant bits of the data type still hang
- *		over the edge of the new size, then the number of significant
- *		bits is decreased.
+ * Purpose:    Sets the total size in bytes for a data type (this operation
+ *        is not permitted on reference data types).  If the size is
+ *        decreased so that the significant bits of the data type
+ *        extend beyond the edge of the new size, then the `offset'
+ *        property is decreased toward zero.  If the `offset' becomes
+ *        zero and the significant bits of the data type still hang
+ *        over the edge of the new size, then the number of significant
+ *        bits is decreased.
  *
- *		Adjusting the size of an H5T_STRING automatically sets the
- *		precision to 8*size.
+ *        Adjusting the size of an H5T_STRING automatically sets the
+ *        precision to 8*size.
  *
- *		All data types have a positive size.
+ *        All data types have a positive size.
  *
- * Return:	Success:	non-negative
+ * Return:    Success:    non-negative
  *
- *		Failure:	nagative
+ *            Failure:    nagative
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, December 22, 1998
  *
- * Modifications:
- * 	Robb Matzke, 22 Dec 1998
- *	Also works with derived data types.
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_set_size(H5T_t *dt, size_t size)
+H5T__set_size(H5T_t *dt, size_t size)
 {
-    size_t	prec, offset;
-    herr_t      ret_value=SUCCEED;       /* Return value */
+    size_t    prec, offset;
+    herr_t    ret_value = SUCCEED;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Check args */
     HDassert(dt);
@@ -3711,8 +3853,8 @@ H5T_set_size(H5T_t *dt, size_t size)
     HDassert(H5T_REFERENCE!=dt->shared->type);
     HDassert(!(H5T_ENUM==dt->shared->type && 0==dt->shared->u.enumer.nmembs));
 
-    if (dt->shared->parent) {
-        if (H5T_set_size(dt->shared->parent, size)<0)
+    if(dt->shared->parent) {
+        if(H5T__set_size(dt->shared->parent, size) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to set size for parent data type");
 
         /* Adjust size of datatype appropriately */
@@ -3720,7 +3862,8 @@ H5T_set_size(H5T_t *dt, size_t size)
             dt->shared->size = dt->shared->parent->shared->size * dt->shared->u.array.nelem;
         else if(dt->shared->type!=H5T_VLEN)
             dt->shared->size = dt->shared->parent->shared->size;
-    } else {
+    } /* end if */
+    else {
         if (H5T_IS_ATOMIC(dt->shared)) {
             offset = dt->shared->u.atomic.offset;
             prec = dt->shared->u.atomic.prec;
@@ -3733,11 +3876,11 @@ H5T_set_size(H5T_t *dt, size_t size)
                     offset = 8 * size - prec;
             if (prec > 8*size)
                 prec = 8 * size;
-        } else {
+        } /* end if */
+        else
             prec = offset = 0;
-        }
 
-        switch (dt->shared->type) {
+        switch(dt->shared->type) {
             case H5T_INTEGER:
             case H5T_TIME:
             case H5T_BITFIELD:
@@ -3747,44 +3890,44 @@ H5T_set_size(H5T_t *dt, size_t size)
 
             case H5T_COMPOUND:
                 /* If decreasing size, check the last member isn't being cut. */
-                if(size<dt->shared->size) {
+                if(size < dt->shared->size) {
                     int         num_membs = 0;
-                    unsigned    i, max_index=0;
-                    size_t      memb_offset, max_offset=0;
+                    unsigned    i, max_index = 0;
+                    size_t      memb_offset, max_offset = 0;
                     size_t      max_size;
 
-                    if((num_membs = H5T_get_nmembers(dt))<0)
+                    if((num_membs = H5T_get_nmembers(dt)) < 0)
                         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to get number of members");
 
                     if(num_membs) {
-			for(i=0; i<(unsigned)num_membs; i++) {
-			    memb_offset = H5T_get_member_offset(dt, i);
-			    if(memb_offset > max_offset) {
-			        max_offset = memb_offset;
-				max_index = i;
-			    }
-			}
-
-			max_size = H5T__get_member_size(dt, max_index);
-
-			if(size<(max_offset+max_size))
-			    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "size shrinking will cut off last member ");
-                    }
+                        for(i = 0; i < (unsigned)num_membs; i++) {
+                            memb_offset = H5T_get_member_offset(dt, i);
+                            if(memb_offset > max_offset) {
+                                max_offset = memb_offset;
+                                max_index = i;
+                            } /* end if */
+                        } /* end for */
+
+                        max_size = H5T__get_member_size(dt, max_index);
+
+                        if(size < (max_offset + max_size))
+                            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "size shrinking will cut off last member ");
+                    } /* end if */
 
                     /* Compound must not have been packed previously */
                     /* We will check if resizing changed the packed state of
                      * this type at the end of this function */
                     HDassert(!dt->shared->u.compnd.packed);
-                }
+                } /* end if */
 
                 break;
 
             case H5T_STRING:
                 /* Convert string to variable-length datatype */
-                if(size==H5T_VARIABLE) {
-                    H5T_t	*base = NULL;		/* base data type */
-                    H5T_cset_t  tmp_cset;               /* Temp. cset info */
-                    H5T_str_t   tmp_strpad;             /* Temp. strpad info */
+                if(size == H5T_VARIABLE) {
+                    H5T_t       *base = NULL;        /* base data type */
+                    H5T_cset_t  tmp_cset;            /* Temp. cset info */
+                    H5T_str_t   tmp_strpad;          /* Temp. strpad info */
 
                     /* Get a copy of unsigned char type as the base/parent type */
                     if(NULL == (base = (H5T_t *)H5I_object(H5T_NATIVE_UCHAR)))
@@ -3796,14 +3939,14 @@ H5T_set_size(H5T_t *dt, size_t size)
 
                     /*
                      * Force conversions (i.e. memory to memory conversions
-		     * should duplicate data, not point to the same VL strings)
+                     * should duplicate data, not point to the same VL strings)
                      */
                     dt->shared->force_conv = TRUE;
 
-		    /* Before we mess with the info in the union, extract the
-		     * values we need */
-                    tmp_cset=dt->shared->u.atomic.u.s.cset;
-                    tmp_strpad=dt->shared->u.atomic.u.s.pad;
+                    /* Before we mess with the info in the union, extract the
+                     * values we need */
+                    tmp_cset = dt->shared->u.atomic.u.s.cset;
+                    tmp_strpad = dt->shared->u.atomic.u.s.pad;
 
                     /* This is a string, not a sequence */
                     dt->shared->u.vlen.type = H5T_VLEN_STRING;
@@ -3815,8 +3958,8 @@ H5T_set_size(H5T_t *dt, size_t size)
                     /* Set up VL information */
                     if (H5T_set_loc(dt, NULL, H5T_LOC_MEMORY)<0)
                         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "invalid datatype location");
-
-                } else {
+                } /* end if */
+                else {
                     prec = 8 * size;
                     offset = 0;
                 } /* end else */
@@ -3827,11 +3970,11 @@ H5T_set_size(H5T_t *dt, size_t size)
                  * The sign, mantissa, and exponent fields should be adjusted
                  * first when decreasing the size of a floating point type.
                  */
-                if (dt->shared->u.atomic.u.f.sign >= prec+offset ||
+                if(dt->shared->u.atomic.u.f.sign >= prec+offset ||
                         dt->shared->u.atomic.u.f.epos + dt->shared->u.atomic.u.f.esize > prec+offset ||
                         dt->shared->u.atomic.u.f.mpos + dt->shared->u.atomic.u.f.msize > prec+offset) {
                     HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "adjust sign, mantissa, and exponent fields first");
-                }
+                } /* end if */
                 break;
 
             case H5T_ENUM:
@@ -3840,50 +3983,49 @@ H5T_set_size(H5T_t *dt, size_t size)
             case H5T_REFERENCE:
                 HDassert("can't happen" && 0);
                 break;
+
             case H5T_NO_CLASS:
             case H5T_NCLASSES:
                 HDassert("invalid type" && 0);
                 break;
+
             default:
                 HDassert("not implemented yet" && 0);
                 break;
-        }
+        } /* end switch */
 
         /* Commit (if we didn't convert this type to a VL string) */
-        if(dt->shared->type!=H5T_VLEN) {
+        if(dt->shared->type != H5T_VLEN) {
             dt->shared->size = size;
             if (H5T_IS_ATOMIC(dt->shared)) {
                 dt->shared->u.atomic.offset = offset;
                 dt->shared->u.atomic.prec = prec;
-            }
+            } /* end if */
         } /* end if */
 
         /* Check if the new compound type is packed */
         if(dt->shared->type == H5T_COMPOUND)
             H5T__update_packed(dt);
-    }
+    } /* end else */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5T__set_size() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_get_size
+ * Function:  H5T_get_size
  *
- * Purpose:	Determines the total size of a data type in bytes.
+ * Purpose:   Determines the total size of a data type in bytes.
  *
- * Return:	Success:	Size of the data type in bytes.	 The size of
- *				the data type is the size of an instance of
- *				that data type.
+ * Return:    Success:    Size of the data type in bytes.     The size of
+ *                the data type is the size of an instance of
+ *                that data type.
  *
- *		Failure:	0 (valid data types are never zero size)
- *
- * Programmer:	Robb Matzke
- *		Tuesday, December  9, 1997
- *
- * Modifications:
+ *            Failure:    0 (valid data types are never zero size)
  *
+ * Programmer:    Robb Matzke
+ *        Tuesday, December  9, 1997
  *-------------------------------------------------------------------------
  */
 size_t
@@ -3900,30 +4042,30 @@ H5T_get_size(const H5T_t *dt)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_cmp
+ * Function:  H5T_cmp
  *
- * Purpose:	Compares two data types.
+ * Purpose:   Compares two data types.
  *
- * Return:	Success:	0 if DT1 and DT2 are equal.
- *				<0 if DT1 is less than DT2.
- *				>0 if DT1 is greater than DT2.
+ * Return:    Success:    0 if DT1 and DT2 are equal.
+ *                       <0 if DT1 is less than DT2.
+ *                       >0 if DT1 is greater than DT2.
  *
- *		Failure:	0, never fails
+ *            Failure:    0, never fails
  *
- * Programmer:	Robb Matzke
- *		Wednesday, December 10, 1997
+ * Programmer:    Robb Matzke
+ *        Wednesday, December 10, 1997
  *
  *-------------------------------------------------------------------------
  */
 int
 H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
 {
-    unsigned	*idx1 = NULL, *idx2 = NULL;
-    size_t	base_size;
-    hbool_t	swapped;
-    unsigned u;
-    int	tmp;
-    int	ret_value = 0;
+    unsigned    *idx1 = NULL, *idx2 = NULL;
+    size_t      base_size;
+    hbool_t     swapped;
+    unsigned    u;
+    int         tmp;
+    int         ret_value = 0;
 
     FUNC_ENTER_NOAPI(0)
 
@@ -3951,10 +4093,10 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
     if(!dt1->shared->parent && dt2->shared->parent)
         HGOTO_DONE(1);
     if(dt1->shared->parent) {
-	tmp = H5T_cmp(dt1->shared->parent, dt2->shared->parent, superset);
-	if(tmp < 0)
+        tmp = H5T_cmp(dt1->shared->parent, dt2->shared->parent, superset);
+        if(tmp < 0)
             HGOTO_DONE(-1);
-	if(tmp > 0)
+        if(tmp > 0)
             HGOTO_DONE(1);
     } /* end if */
 
@@ -4005,7 +4147,7 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
 
 #ifdef H5T_DEBUG
             /* I don't quite trust the code above yet :-)  --RPM */
-            for (u=0; u<dt1->shared->u.compnd.nmembs-1; u++) {
+            for(u=0; u<dt1->shared->u.compnd.nmembs-1; u++) {
                 HDassert(HDstrcmp(dt1->shared->u.compnd.memb[idx1[u]].name,
                         dt1->shared->u.compnd.memb[idx1[u + 1]].name));
                 HDassert(HDstrcmp(dt2->shared->u.compnd.memb[idx2[u]].name,
@@ -4014,24 +4156,24 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
 #endif
 
             /* Compare the members */
-            for (u=0; u<dt1->shared->u.compnd.nmembs; u++) {
+            for(u=0; u<dt1->shared->u.compnd.nmembs; u++) {
                 tmp = HDstrcmp(dt1->shared->u.compnd.memb[idx1[u]].name,
                        dt2->shared->u.compnd.memb[idx2[u]].name);
-                if (tmp < 0)
+                if(tmp < 0)
                     HGOTO_DONE(-1);
-                if (tmp > 0)
+                if(tmp > 0)
                     HGOTO_DONE(1);
 
-                if (dt1->shared->u.compnd.memb[idx1[u]].offset < dt2->shared->u.compnd.memb[idx2[u]].offset) HGOTO_DONE(-1);
-                if (dt1->shared->u.compnd.memb[idx1[u]].offset > dt2->shared->u.compnd.memb[idx2[u]].offset) HGOTO_DONE(1);
+                if(dt1->shared->u.compnd.memb[idx1[u]].offset < dt2->shared->u.compnd.memb[idx2[u]].offset) HGOTO_DONE(-1);
+                if(dt1->shared->u.compnd.memb[idx1[u]].offset > dt2->shared->u.compnd.memb[idx2[u]].offset) HGOTO_DONE(1);
 
-                if (dt1->shared->u.compnd.memb[idx1[u]].size < dt2->shared->u.compnd.memb[idx2[u]].size) HGOTO_DONE(-1);
-                if (dt1->shared->u.compnd.memb[idx1[u]].size > dt2->shared->u.compnd.memb[idx2[u]].size) HGOTO_DONE(1);
+                if(dt1->shared->u.compnd.memb[idx1[u]].size < dt2->shared->u.compnd.memb[idx2[u]].size) HGOTO_DONE(-1);
+                if(dt1->shared->u.compnd.memb[idx1[u]].size > dt2->shared->u.compnd.memb[idx2[u]].size) HGOTO_DONE(1);
 
                 tmp = H5T_cmp(dt1->shared->u.compnd.memb[idx1[u]].type,
                       dt2->shared->u.compnd.memb[idx2[u]].type, superset);
-                if (tmp < 0) HGOTO_DONE(-1);
-                if (tmp > 0) HGOTO_DONE(1);
+                if(tmp < 0) HGOTO_DONE(-1);
+                if(tmp > 0) HGOTO_DONE(1);
             }
             break;
 
@@ -4044,13 +4186,13 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
              * more members than dt1
              */
             if(superset) {
-                if (dt1->shared->u.enumer.nmembs > dt2->shared->u.enumer.nmembs)
+                if(dt1->shared->u.enumer.nmembs > dt2->shared->u.enumer.nmembs)
                     HGOTO_DONE(1);
             } /* end if */
             else {
-                if (dt1->shared->u.enumer.nmembs < dt2->shared->u.enumer.nmembs)
+                if(dt1->shared->u.enumer.nmembs < dt2->shared->u.enumer.nmembs)
                     HGOTO_DONE(-1);
-                if (dt1->shared->u.enumer.nmembs > dt2->shared->u.enumer.nmembs)
+                if(dt1->shared->u.enumer.nmembs > dt2->shared->u.enumer.nmembs)
                     HGOTO_DONE(1);
             } /* end else */
 
@@ -4058,15 +4200,15 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
             if(NULL == (idx1 = (unsigned *)H5MM_malloc(dt1->shared->u.enumer.nmembs * sizeof(unsigned))) ||
                     NULL == (idx2 = (unsigned *)H5MM_malloc(dt2->shared->u.enumer.nmembs * sizeof(unsigned))))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed");
-            for (u=0; u<dt1->shared->u.enumer.nmembs; u++)
+            for(u=0; u<dt1->shared->u.enumer.nmembs; u++)
                 idx1[u] = u;
             if(dt1->shared->u.enumer.nmembs > 1) {
                 int i;
                 for (i = (int) dt1->shared->u.enumer.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i) {
                     int j;
 
-                    for (j = 0, swapped = FALSE; j < i; j++)
-                        if (HDstrcmp(dt1->shared->u.enumer.name[idx1[j]],
+                    for(j = 0, swapped = FALSE; j < i; j++)
+                        if(HDstrcmp(dt1->shared->u.enumer.name[idx1[j]],
                                  dt1->shared->u.enumer.name[idx1[j+1]]) > 0) {
                             unsigned tmp_idx = idx1[j];
                             idx1[j] = idx1[j+1];
@@ -4075,16 +4217,16 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                         }
                 }
             }
-            for (u=0; u<dt2->shared->u.enumer.nmembs; u++)
+            for(u=0; u<dt2->shared->u.enumer.nmembs; u++)
                 idx2[u] = u;
             if(dt2->shared->u.enumer.nmembs > 1) {
                 int i;
 
-                for (i = (int) dt2->shared->u.enumer.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i) {
+                for(i = (int) dt2->shared->u.enumer.nmembs - 1, swapped = TRUE; swapped && i >= 0; --i) {
                     int j;
 
-                    for (j = 0, swapped = FALSE; j < i; j++)
-                        if (HDstrcmp(dt2->shared->u.enumer.name[idx2[j]],
+                    for(j = 0, swapped = FALSE; j < i; j++)
+                        if(HDstrcmp(dt2->shared->u.enumer.name[idx2[j]],
                                  dt2->shared->u.enumer.name[idx2[j+1]]) > 0) {
                             unsigned tmp_idx = idx2[j];
                             idx2[j] = idx2[j+1];
@@ -4096,7 +4238,7 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
 
 #ifdef H5T_DEBUG
             /* I don't quite trust the code above yet :-)  --RPM */
-            for (u=0; u<dt1->shared->u.enumer.nmembs-1; u++) {
+            for(u=0; u<dt1->shared->u.enumer.nmembs-1; u++) {
                 HDassert(HDstrcmp(dt1->shared->u.enumer.name[idx1[u]],
                         dt1->shared->u.enumer.name[idx1[u+1]]));
                 HDassert(HDstrcmp(dt2->shared->u.enumer.name[idx2[u]],
@@ -4106,12 +4248,12 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
 
             /* Compare the members */
             base_size = dt1->shared->parent->shared->size;
-            for (u=0; u<dt1->shared->u.enumer.nmembs; u++) {
+            for(u=0; u<dt1->shared->u.enumer.nmembs; u++) {
                 unsigned idx = 0;
 
                 if(superset) {
                     unsigned    lt = 0, rt;        /* Final, left & right key indices */
-                    int	        cmp = 1;                /* Key comparison value */
+                    int            cmp = 1;                /* Key comparison value */
 
                     /* If a superset is allowed, dt2 may have more members
                      * than dt1, so binary search for matching member name in
@@ -4119,18 +4261,18 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                      */
                     rt = dt2->shared->u.enumer.nmembs;
 
-                    while (lt < rt && cmp) {
+                    while(lt < rt && cmp) {
                         idx = (lt + rt) / 2;
 
                         /* compare */
-                        if ((cmp = HDstrcmp(dt1->shared->u.enumer.name[idx1[u]],
+                        if((cmp = HDstrcmp(dt1->shared->u.enumer.name[idx1[u]],
                                 dt2->shared->u.enumer.name[idx2[idx]] ) ) < 0)
                             rt = idx;
                         else
                             lt = idx+1;
                     }
                     /* Leave, if we couldn't find match */
-                    if (cmp)
+                    if(cmp)
                         HGOTO_DONE(-1);
                 } /* end if */
                 else {
@@ -4149,8 +4291,8 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                 tmp = HDmemcmp(dt1->shared->u.enumer.value+idx1[u]*base_size,
                        dt2->shared->u.enumer.value+idx2[idx]*base_size,
                        base_size);
-                if (tmp<0) HGOTO_DONE(-1);
-                if (tmp>0) HGOTO_DONE(1);
+                if(tmp<0) HGOTO_DONE(-1);
+                if(tmp>0) HGOTO_DONE(1);
             }
             break;
 
@@ -4161,29 +4303,32 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
             HDassert(dt2->shared->u.vlen.loc>=H5T_LOC_BADLOC && dt2->shared->u.vlen.loc<H5T_LOC_MAXLOC);
 
             /* Arbitrarily sort sequence VL datatypes before string VL datatypes */
-            if (dt1->shared->u.vlen.type==H5T_VLEN_SEQUENCE &&
+            if(dt1->shared->u.vlen.type==H5T_VLEN_SEQUENCE &&
                     dt2->shared->u.vlen.type==H5T_VLEN_STRING) {
                 HGOTO_DONE(-1);
-            } else if (dt1->shared->u.vlen.type==H5T_VLEN_STRING &&
+            }
+            else if(dt1->shared->u.vlen.type==H5T_VLEN_STRING &&
                     dt2->shared->u.vlen.type==H5T_VLEN_SEQUENCE) {
                 HGOTO_DONE(1);
             }
             /* Arbitrarily sort VL datatypes in memory before disk */
-            if (dt1->shared->u.vlen.loc==H5T_LOC_MEMORY &&
+            if(dt1->shared->u.vlen.loc==H5T_LOC_MEMORY &&
                     dt2->shared->u.vlen.loc==H5T_LOC_DISK) {
                 HGOTO_DONE(-1);
-            } else if (dt1->shared->u.vlen.loc==H5T_LOC_DISK &&
+            }
+            else if(dt1->shared->u.vlen.loc==H5T_LOC_DISK &&
                     dt2->shared->u.vlen.loc==H5T_LOC_MEMORY) {
                 HGOTO_DONE(1);
-            } else if (dt1->shared->u.vlen.loc==H5T_LOC_BADLOC &&
+            }
+            else if(dt1->shared->u.vlen.loc==H5T_LOC_BADLOC &&
                     dt2->shared->u.vlen.loc!=H5T_LOC_BADLOC) {
                 HGOTO_DONE(1);
             }
 
             /* Don't allow VL types in different files to compare as equal */
-            if (dt1->shared->u.vlen.f < dt2->shared->u.vlen.f)
+            if(dt1->shared->u.vlen.f < dt2->shared->u.vlen.f)
                 HGOTO_DONE(-1);
-            if (dt1->shared->u.vlen.f > dt2->shared->u.vlen.f)
+            if(dt1->shared->u.vlen.f > dt2->shared->u.vlen.f)
                 HGOTO_DONE(1);
             break;
 
@@ -4193,22 +4338,22 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
             break;
 
         case H5T_ARRAY:
-            if (dt1->shared->u.array.ndims < dt2->shared->u.array.ndims)
+            if(dt1->shared->u.array.ndims < dt2->shared->u.array.ndims)
                 HGOTO_DONE(-1);
-            if (dt1->shared->u.array.ndims > dt2->shared->u.array.ndims)
+            if(dt1->shared->u.array.ndims > dt2->shared->u.array.ndims)
                 HGOTO_DONE(1);
 
-            for (u=0; u<dt1->shared->u.array.ndims; u++) {
-                if (dt1->shared->u.array.dim[u] < dt2->shared->u.array.dim[u])
+            for(u=0; u<dt1->shared->u.array.ndims; u++) {
+                if(dt1->shared->u.array.dim[u] < dt2->shared->u.array.dim[u])
                     HGOTO_DONE(-1);
-                if (dt1->shared->u.array.dim[u] > dt2->shared->u.array.dim[u])
+                if(dt1->shared->u.array.dim[u] > dt2->shared->u.array.dim[u])
                     HGOTO_DONE(1);
             }
 
             tmp = H5T_cmp(dt1->shared->parent, dt2->shared->parent, superset);
-            if (tmp < 0)
+            if(tmp < 0)
                 HGOTO_DONE(-1);
-            if (tmp > 0)
+            if(tmp > 0)
                 HGOTO_DONE(1);
             break;
 
@@ -4224,62 +4369,62 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
             /*
              * Atomic datatypes...
              */
-            if (dt1->shared->u.atomic.order < dt2->shared->u.atomic.order) HGOTO_DONE(-1);
-            if (dt1->shared->u.atomic.order > dt2->shared->u.atomic.order) HGOTO_DONE(1);
+            if(dt1->shared->u.atomic.order < dt2->shared->u.atomic.order) HGOTO_DONE(-1);
+            if(dt1->shared->u.atomic.order > dt2->shared->u.atomic.order) HGOTO_DONE(1);
 
-            if (dt1->shared->u.atomic.prec < dt2->shared->u.atomic.prec) HGOTO_DONE(-1);
-            if (dt1->shared->u.atomic.prec > dt2->shared->u.atomic.prec) HGOTO_DONE(1);
+            if(dt1->shared->u.atomic.prec < dt2->shared->u.atomic.prec) HGOTO_DONE(-1);
+            if(dt1->shared->u.atomic.prec > dt2->shared->u.atomic.prec) HGOTO_DONE(1);
 
-            if (dt1->shared->u.atomic.offset < dt2->shared->u.atomic.offset) HGOTO_DONE(-1);
-            if (dt1->shared->u.atomic.offset > dt2->shared->u.atomic.offset) HGOTO_DONE(1);
+            if(dt1->shared->u.atomic.offset < dt2->shared->u.atomic.offset) HGOTO_DONE(-1);
+            if(dt1->shared->u.atomic.offset > dt2->shared->u.atomic.offset) HGOTO_DONE(1);
 
-            if (dt1->shared->u.atomic.lsb_pad < dt2->shared->u.atomic.lsb_pad) HGOTO_DONE(-1);
-            if (dt1->shared->u.atomic.lsb_pad > dt2->shared->u.atomic.lsb_pad) HGOTO_DONE(1);
+            if(dt1->shared->u.atomic.lsb_pad < dt2->shared->u.atomic.lsb_pad) HGOTO_DONE(-1);
+            if(dt1->shared->u.atomic.lsb_pad > dt2->shared->u.atomic.lsb_pad) HGOTO_DONE(1);
 
-            if (dt1->shared->u.atomic.msb_pad < dt2->shared->u.atomic.msb_pad) HGOTO_DONE(-1);
-            if (dt1->shared->u.atomic.msb_pad > dt2->shared->u.atomic.msb_pad) HGOTO_DONE(1);
+            if(dt1->shared->u.atomic.msb_pad < dt2->shared->u.atomic.msb_pad) HGOTO_DONE(-1);
+            if(dt1->shared->u.atomic.msb_pad > dt2->shared->u.atomic.msb_pad) HGOTO_DONE(1);
 
             switch (dt1->shared->type) {
                 case H5T_INTEGER:
-                    if (dt1->shared->u.atomic.u.i.sign < dt2->shared->u.atomic.u.i.sign)
+                    if(dt1->shared->u.atomic.u.i.sign < dt2->shared->u.atomic.u.i.sign)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.i.sign > dt2->shared->u.atomic.u.i.sign)
+                    if(dt1->shared->u.atomic.u.i.sign > dt2->shared->u.atomic.u.i.sign)
                         HGOTO_DONE(1);
                     break;
 
                 case H5T_FLOAT:
-                    if (dt1->shared->u.atomic.u.f.sign < dt2->shared->u.atomic.u.f.sign)
+                    if(dt1->shared->u.atomic.u.f.sign < dt2->shared->u.atomic.u.f.sign)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.sign > dt2->shared->u.atomic.u.f.sign)
+                    if(dt1->shared->u.atomic.u.f.sign > dt2->shared->u.atomic.u.f.sign)
                         HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.f.epos < dt2->shared->u.atomic.u.f.epos)
+                    if(dt1->shared->u.atomic.u.f.epos < dt2->shared->u.atomic.u.f.epos)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.epos > dt2->shared->u.atomic.u.f.epos)
+                    if(dt1->shared->u.atomic.u.f.epos > dt2->shared->u.atomic.u.f.epos)
                         HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.f.esize < dt2->shared->u.atomic.u.f.esize) HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.esize > dt2->shared->u.atomic.u.f.esize) HGOTO_DONE(1);
+                    if(dt1->shared->u.atomic.u.f.esize < dt2->shared->u.atomic.u.f.esize) HGOTO_DONE(-1);
+                    if(dt1->shared->u.atomic.u.f.esize > dt2->shared->u.atomic.u.f.esize) HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.f.ebias < dt2->shared->u.atomic.u.f.ebias) HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.ebias > dt2->shared->u.atomic.u.f.ebias) HGOTO_DONE(1);
+                    if(dt1->shared->u.atomic.u.f.ebias < dt2->shared->u.atomic.u.f.ebias) HGOTO_DONE(-1);
+                    if(dt1->shared->u.atomic.u.f.ebias > dt2->shared->u.atomic.u.f.ebias) HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.f.mpos < dt2->shared->u.atomic.u.f.mpos)
+                    if(dt1->shared->u.atomic.u.f.mpos < dt2->shared->u.atomic.u.f.mpos)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.mpos > dt2->shared->u.atomic.u.f.mpos)
+                    if(dt1->shared->u.atomic.u.f.mpos > dt2->shared->u.atomic.u.f.mpos)
                         HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.f.msize < dt2->shared->u.atomic.u.f.msize) HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.msize > dt2->shared->u.atomic.u.f.msize) HGOTO_DONE(1);
+                    if(dt1->shared->u.atomic.u.f.msize < dt2->shared->u.atomic.u.f.msize) HGOTO_DONE(-1);
+                    if(dt1->shared->u.atomic.u.f.msize > dt2->shared->u.atomic.u.f.msize) HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.f.norm < dt2->shared->u.atomic.u.f.norm)
+                    if(dt1->shared->u.atomic.u.f.norm < dt2->shared->u.atomic.u.f.norm)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.norm > dt2->shared->u.atomic.u.f.norm)
+                    if(dt1->shared->u.atomic.u.f.norm > dt2->shared->u.atomic.u.f.norm)
                         HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.f.pad < dt2->shared->u.atomic.u.f.pad)
+                    if(dt1->shared->u.atomic.u.f.pad < dt2->shared->u.atomic.u.f.pad)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.f.pad > dt2->shared->u.atomic.u.f.pad)
+                    if(dt1->shared->u.atomic.u.f.pad > dt2->shared->u.atomic.u.f.pad)
                         HGOTO_DONE(1);
 
                     break;
@@ -4289,14 +4434,14 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                     break;
 
                 case H5T_STRING:
-                    if (dt1->shared->u.atomic.u.s.cset < dt2->shared->u.atomic.u.s.cset)
+                    if(dt1->shared->u.atomic.u.s.cset < dt2->shared->u.atomic.u.s.cset)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.s.cset > dt2->shared->u.atomic.u.s.cset)
+                    if(dt1->shared->u.atomic.u.s.cset > dt2->shared->u.atomic.u.s.cset)
                         HGOTO_DONE(1);
 
-                    if (dt1->shared->u.atomic.u.s.pad < dt2->shared->u.atomic.u.s.pad)
+                    if(dt1->shared->u.atomic.u.s.pad < dt2->shared->u.atomic.u.s.pad)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.s.pad > dt2->shared->u.atomic.u.s.pad)
+                    if(dt1->shared->u.atomic.u.s.pad > dt2->shared->u.atomic.u.s.pad)
                         HGOTO_DONE(1);
 
                     break;
@@ -4306,16 +4451,16 @@ H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset)
                     break;
 
                 case H5T_REFERENCE:
-                    if (dt1->shared->u.atomic.u.r.rtype < dt2->shared->u.atomic.u.r.rtype)
+                    if(dt1->shared->u.atomic.u.r.rtype < dt2->shared->u.atomic.u.r.rtype)
                         HGOTO_DONE(-1);
-                    if (dt1->shared->u.atomic.u.r.rtype > dt2->shared->u.atomic.u.r.rtype)
+                    if(dt1->shared->u.atomic.u.r.rtype > dt2->shared->u.atomic.u.r.rtype)
                         HGOTO_DONE(1);
 
                     switch(dt1->shared->u.atomic.u.r.rtype) {
                         case H5R_OBJECT:
-                            if (dt1->shared->u.atomic.u.r.loc < dt2->shared->u.atomic.u.r.loc)
+                            if(dt1->shared->u.atomic.u.r.loc < dt2->shared->u.atomic.u.r.loc)
                                 HGOTO_DONE(-1);
-                            if (dt1->shared->u.atomic.u.r.loc > dt2->shared->u.atomic.u.r.loc)
+                            if(dt1->shared->u.atomic.u.r.loc > dt2->shared->u.atomic.u.r.loc)
                                 HGOTO_DONE(1);
                             break;
 
@@ -4359,56 +4504,30 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_path_find
- *
- * Purpose:	Finds the path which converts type SRC_ID to type DST_ID,
- *		creating a new path if necessary.  If FUNC is non-zero then
- *		it is set as the hard conversion function for that path
- *		regardless of whether the path previously existed. Changing
- *		the conversion function of a path causes statistics to be
- *		reset to zero after printing them.  The NAME is used only
- *		when creating a new path and is just for debugging.
+ * Function:    H5T_path_find
  *
- *		If SRC and DST are both null pointers then the special no-op
- *		conversion path is used.  This path is always stored as the
- *		first path in the path table.
+ * Purpose:    Library-internal wrapper to find the path which converts type
+ *              SRC_ID to type DST_ID.
  *
- * Return:	Success:	Pointer to the path, valid until the path
- *				database is modified.
+ *              If SRC and DST are both null pointers then the special no-op
+ *              conversion path is used.
  *
- *		Failure:	NULL if the path does not exist and no
- *				function can be found to apply to the new
- *				path.
+ * Return:    Success:    Pointer to the path, valid until the path
+ *                        database is modified.
  *
- * Programmer:	Robb Matzke
- *		Tuesday, January 13, 1998
+ *            Failure:    NULL if the path does not exist and no
+ *                        function can be found to apply to the new path.
  *
- * Modifications:
- *              Added a parameter IS_API to indicate whether to an API
- *              function issued a call to this function.  If a API
- *              function like H5Tregister() is calling this function to
- *              register a new hard conversion function, IS_API is TRUE
- *              and the old path is replaced.  If a private function like
- *              H5T__init_package() is trying to register hard conversions,
- *              IS_API is FALSE and the old hard path is not replaced.
- *              Tuesday, Sept 13, 2005
+ * Programmer:  Quincey Koziol
+ *              Monday, March 5, 2018
  *
  *-------------------------------------------------------------------------
  */
 H5T_path_t *
-H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
-    H5T_conv_t func, hid_t dxpl_id, hbool_t is_api)
+H5T_path_find(const H5T_t *src, const H5T_t *dst)
 {
-    int	lt, rt;			/*left and right edges		*/
-    int	md;			/*middle			*/
-    int	cmp;			/*comparison result		*/
-    int old_npaths;             /* Previous number of paths in table */
-    H5T_path_t	*table = NULL;		/*path existing in the table	*/
-    H5T_path_t	*path = NULL;		/*new path			*/
-    hid_t	src_id = -1, dst_id = -1;	/*src and dst type identifiers	*/
-    int	i;			/*counter			*/
-    int	nprint = 0;		/*lines of output printed	*/
-    H5T_path_t	*ret_value = NULL;      /* Return value */
+    H5T_conv_func_t conv_func;          /* Conversion function wrapper */
+    H5T_path_t *ret_value = NULL;       /* Return value */
 
     FUNC_ENTER_NOAPI(NULL)
 
@@ -4418,27 +4537,90 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
     HDassert(dst);
     HDassert(dst->shared);
 
+    /* Set up conversion function wrapper */
+    conv_func.is_app = FALSE;
+    conv_func.u.lib_func = NULL;
+
+    /* Call the internal routine, with additional parameters */
+    if(NULL == (ret_value = H5T__path_find_real(src, dst, NULL, &conv_func)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, NULL, "can't find datatype conversion path")
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5T_path_find() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5T__path_find_real
+ *
+ * Purpose:    Finds the path which converts type SRC_ID to type DST_ID,
+ *        creating a new path if necessary.  If FUNC is non-zero then
+ *        it is set as the hard conversion function for that path
+ *        regardless of whether the path previously existed. Changing
+ *        the conversion function of a path causes statistics to be
+ *        reset to zero after printing them.  The NAME is used only
+ *        when creating a new path and is just for debugging.
+ *
+ *        If SRC and DST are both null pointers then the special no-op
+ *        conversion path is used.  This path is always stored as the
+ *        first path in the path table.
+ *
+ * Return:    Success:    Pointer to the path, valid until the path
+ *                        database is modified.
+ *
+ *            Failure:    NULL if the path does not exist and no
+ *                        function can be found to apply to the new path.
+ *
+ * Programmer:  Robb Matzke
+ *              Tuesday, January 13, 1998
+ *
+ *-------------------------------------------------------------------------
+ */
+static H5T_path_t *
+H5T__path_find_real(const H5T_t *src, const H5T_t *dst, const char *name,
+    H5T_conv_func_t *conv)
+{
+    int           lt, rt;                      /* left and right edges */
+    int           md;                          /* middle */
+    int           cmp;                         /* comparison result  */
+    int           old_npaths;                  /* Previous number of paths in table */
+    H5T_path_t    *table = NULL;               /* path existing in the table */
+    H5T_path_t    *path = NULL;                /* new path */
+    hid_t         src_id = -1, dst_id = -1;    /* src and dst type identifiers */
+    int           i;                           /* counter */
+    int           nprint = 0;                  /* lines of output printed */
+    H5T_path_t    *ret_value = NULL;           /* Return value */
+
+    FUNC_ENTER_STATIC
+
+    /* Sanity check */
+    HDassert(src);
+    HDassert(src->shared);
+    HDassert(dst);
+    HDassert(dst->shared);
+
     /*
      * Make sure the first entry in the table is the no-op conversion path.
      */
     if(0 == H5T_g.npaths) {
-	if(NULL == (H5T_g.path = (H5T_path_t **)H5MM_malloc(128 * sizeof(H5T_path_t *))))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for type conversion path table")
-	H5T_g.apaths = 128;
-	if(NULL == (H5T_g.path[0] = H5FL_CALLOC(H5T_path_t)))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for no-op conversion path")
+        if(NULL == (H5T_g.path = (H5T_path_t **)H5MM_malloc(128 * sizeof(H5T_path_t *))))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for type conversion path table")
+        H5T_g.apaths = 128;
+        if(NULL == (H5T_g.path[0] = H5FL_CALLOC(H5T_path_t)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for no-op conversion path")
         HDsnprintf(H5T_g.path[0]->name, sizeof(H5T_g.path[0]->name), "no-op");
-	H5T_g.path[0]->func = H5T__conv_noop;
-	H5T_g.path[0]->cdata.command = H5T_CONV_INIT;
-	if(H5T__conv_noop((hid_t)FAIL, (hid_t)FAIL, &(H5T_g.path[0]->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, dxpl_id) < 0) {
+        H5T_g.path[0]->conv.is_app = FALSE;
+        H5T_g.path[0]->conv.u.lib_func = H5T__conv_noop;
+        H5T_g.path[0]->cdata.command = H5T_CONV_INIT;
+        if(H5T__conv_noop((hid_t)FAIL, (hid_t)FAIL, &(H5T_g.path[0]->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0) {
 #ifdef H5T_DEBUG
-	    if(H5DEBUG(T))
-		fprintf(H5DEBUG(T), "H5T: unable to initialize no-op conversion function (ignored)\n");
+            if(H5DEBUG(T))
+                fprintf(H5DEBUG(T), "H5T: unable to initialize no-op conversion function (ignored)\n");
 #endif
-	    H5E_clear_stack(NULL); /*ignore the error*/
-	} /* end if */
-	H5T_g.path[0]->is_noop = TRUE;
-	H5T_g.npaths = 1;
+            H5E_clear_stack(NULL); /*ignore the error*/
+        } /* end if */
+        H5T_g.path[0]->is_noop = TRUE;
+        H5T_g.npaths = 1;
     } /* end if */
 
     /*
@@ -4451,28 +4633,28 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
      * are set
      */
     if(src->shared->force_conv == FALSE && dst->shared->force_conv == FALSE && 0 == H5T_cmp(src, dst, TRUE)) {
-	table = H5T_g.path[0];
-	cmp = 0;
-	md = 0;
+        table = H5T_g.path[0];
+        cmp = 0;
+        md = 0;
     } /* end if */
     else {
-	lt = md = 1;
-	rt = H5T_g.npaths;
-	cmp = -1;
-
-	while(cmp && lt < rt) {
-	    md = (lt + rt) / 2;
-	    HDassert(H5T_g.path[md]);
-	    cmp = H5T_cmp(src, H5T_g.path[md]->src, FALSE);
-	    if(0 == cmp)
+        lt = md = 1;
+        rt = H5T_g.npaths;
+        cmp = -1;
+
+        while(cmp && lt < rt) {
+            md = (lt + rt) / 2;
+            HDassert(H5T_g.path[md]);
+            cmp = H5T_cmp(src, H5T_g.path[md]->src, FALSE);
+            if(0 == cmp)
                 cmp = H5T_cmp(dst, H5T_g.path[md]->dst, FALSE);
-	    if(cmp < 0)
-		rt = md;
-	    else if(cmp > 0)
-		lt = md + 1;
-	    else
-		table = H5T_g.path[md];
-	} /* end while */
+            if(cmp < 0)
+                rt = md;
+            else if(cmp > 0)
+                lt = md + 1;
+            else
+                table = H5T_g.path[md];
+        } /* end while */
     } /* end else */
 
     /* Keep a record of the number of paths in the table, in case one of the
@@ -4487,22 +4669,22 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
      * specifying a new hard conversion and the path is a soft conversion, then
      * create a new path and add the new function to the path.
      */
-    if(!table || (table && func && is_api) || (table && !table->is_hard && func && !is_api)) {
-	if(NULL == (path = H5FL_CALLOC(H5T_path_t)))
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for type conversion path")
-	if(name && *name) {
-	    HDstrncpy(path->name, name, (size_t)H5T_NAMELEN);
-	    path->name[H5T_NAMELEN - 1] = '\0';
+    if(!table || (table && conv->is_app && conv->u.app_func) || (table && !table->is_hard && !conv->is_app && conv->u.lib_func)) {
+        if(NULL == (path = H5FL_CALLOC(H5T_path_t)))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for type conversion path")
+        if(name && *name) {
+            HDstrncpy(path->name, name, (size_t)H5T_NAMELEN);
+            path->name[H5T_NAMELEN - 1] = '\0';
         } /* end if */
-	else
-	    HDsnprintf(path->name, sizeof(path->name), "NONAME");
-	if(NULL == (path->src = H5T_copy(src, H5T_COPY_ALL)))
-	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy datatype for conversion path")
+        else
+            HDsnprintf(path->name, sizeof(path->name), "NONAME");
+        if(NULL == (path->src = H5T_copy(src, H5T_COPY_ALL)))
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy datatype for conversion path")
         if(NULL == (path->dst = H5T_copy(dst, H5T_COPY_ALL)))
-	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy datatype for conversion path")
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to copy datatype for conversion path")
     } /* end if */
     else
-	path = table;
+        path = table;
 
     /*
      * If a hard conversion function is specified and none is defined for the
@@ -4510,23 +4692,28 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
      * the existing path is a soft function, then add the new conversion to the path
      * and initialize its conversion data.
      */
-    if(func && (!table || (table && is_api) || (table && !table->is_hard && !is_api))) {
-	HDassert(path != table);
-	HDassert(NULL == path->func);
-	if(path->src && (src_id = H5I_register(H5I_DATATYPE, H5T_copy(path->src, H5T_COPY_ALL), FALSE)) < 0)
-	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register source conversion type for query")
-	if(path->dst && (dst_id = H5I_register(H5I_DATATYPE, H5T_copy(path->dst, H5T_COPY_ALL), FALSE)) < 0)
-	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register destination conversion type for query")
-	path->cdata.command = H5T_CONV_INIT;
-	if((func)(src_id, dst_id, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, dxpl_id) < 0)
-	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to initialize conversion function")
-	if(src_id >= 0)
+    if(conv->u.app_func && (!table || (table && conv->is_app) || (table && !table->is_hard && !conv->is_app))) {
+        HDassert(path != table);
+        HDassert(NULL == path->conv.u.app_func);
+        if(path->src && (src_id = H5I_register(H5I_DATATYPE, H5T_copy(path->src, H5T_COPY_ALL), FALSE)) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register source conversion type for query")
+        if(path->dst && (dst_id = H5I_register(H5I_DATATYPE, H5T_copy(path->dst, H5T_COPY_ALL), FALSE)) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register destination conversion type for query")
+        path->cdata.command = H5T_CONV_INIT;
+        if(conv->is_app) {
+            if((conv->u.app_func)(src_id, dst_id, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, H5CX_get_dxpl()) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to initialize conversion function")
+        } /* end if */
+        else
+            if((conv->u.lib_func)(src_id, dst_id, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to initialize conversion function")
+        if(src_id >= 0)
             H5I_dec_ref(src_id);
-	if(dst_id >= 0)
+        if(dst_id >= 0)
             H5I_dec_ref(dst_id);
-	src_id = dst_id = -1;
-	path->func = func;
-	path->is_hard = TRUE;
+        src_id = dst_id = -1;
+        path->conv = *conv;
+        path->is_hard = TRUE;
     } /* end if */
 
     /*
@@ -4535,31 +4722,44 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
      * for an applicable function and add it to the path.  This can't happen
      * for the no-op conversion path.
      */
-    HDassert(path->func || (src && dst));
-    for(i = H5T_g.nsoft - 1; i >= 0 && !path->func; --i) {
-	if(src->shared->type != H5T_g.soft[i].src || dst->shared->type != H5T_g.soft[i].dst)
-	    continue;
-	if((src_id = H5I_register(H5I_DATATYPE, H5T_copy(path->src, H5T_COPY_ALL), FALSE)) < 0)
-	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register src conversion type for query")
-        if((dst_id = H5I_register(H5I_DATATYPE, H5T_copy(path->dst, H5T_COPY_ALL), FALSE)) < 0)
-	    HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register dst conversion type for query")
-	path->cdata.command = H5T_CONV_INIT;
-	if((H5T_g.soft[i].func)(src_id, dst_id, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, dxpl_id) < 0) {
-	    HDmemset(&(path->cdata), 0, sizeof(H5T_cdata_t));
-	    H5E_clear_stack(H5E_DEFAULT); /*ignore the error*/
-	} /* end if */
-        else {
-	    HDstrncpy(path->name, H5T_g.soft[i].name, (size_t)H5T_NAMELEN);
-	    path->name[H5T_NAMELEN - 1] = '\0';
-	    path->func = H5T_g.soft[i].func;
-	    path->is_hard = FALSE;
-	} /* end else */
-	H5I_dec_ref(src_id);
-	H5I_dec_ref(dst_id);
-	src_id = dst_id = -1;
+    HDassert(path->conv.u.app_func || (src && dst));
+    for(i = H5T_g.nsoft - 1; i >= 0 && !path->conv.u.app_func; --i) {
+        hbool_t path_init_error = FALSE;
+
+        if(src->shared->type != H5T_g.soft[i].src || dst->shared->type != H5T_g.soft[i].dst)
+            continue;
+        if((src_id = H5I_register(H5I_DATATYPE, H5T_copy(path->src, H5T_COPY_ALL), FALSE)) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register src conversion type for query")
+           if((dst_id = H5I_register(H5I_DATATYPE, H5T_copy(path->dst, H5T_COPY_ALL), FALSE)) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, NULL, "unable to register dst conversion type for query")
+        path->cdata.command = H5T_CONV_INIT;
+        if(H5T_g.soft[i].conv.is_app) {
+            if((H5T_g.soft[i].conv.u.app_func)(src_id, dst_id, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, H5CX_get_dxpl()) < 0) {
+                HDmemset(&(path->cdata), 0, sizeof(H5T_cdata_t));
+                H5E_clear_stack(H5E_DEFAULT); /*ignore the error*/
+                path_init_error = TRUE;
+            } /* end if */
+        } /* end if */
+        else
+            if((H5T_g.soft[i].conv.u.lib_func)(src_id, dst_id, &(path->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0) {
+                HDmemset(&(path->cdata), 0, sizeof(H5T_cdata_t));
+                H5E_clear_stack(H5E_DEFAULT); /*ignore the error*/
+                path_init_error = TRUE;
+            } /* end if */
+
+        /* Finish operation, if no error */
+        if(!path_init_error) {
+            HDstrncpy(path->name, H5T_g.soft[i].name, (size_t)H5T_NAMELEN);
+            path->name[H5T_NAMELEN - 1] = '\0';
+            path->conv = H5T_g.soft[i].conv;
+            path->is_hard = FALSE;
+        } /* end else */
+        H5I_dec_ref(src_id);
+        H5I_dec_ref(dst_id);
+        src_id = dst_id = -1;
     } /* end for */
-    if(!path->func)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "no appropriate function for conversion path")
+    if(!path->conv.u.app_func)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "no appropriate function for conversion path")
 
     /* Check if paths were inserted into the table through a recursive call
      * and re-compute the correct location for this path if so. - QAK, 1/26/02
@@ -4586,34 +4786,44 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
 
     /* Replace an existing table entry or add a new entry */
     if(table && path != table) {
-	HDassert(table == H5T_g.path[md]);
-	H5T__print_stats(table, &nprint/*in,out*/);
-	table->cdata.command = H5T_CONV_FREE;
-	if((table->func)((hid_t)FAIL, (hid_t)FAIL, &(table->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, dxpl_id) < 0) {
+        HDassert(table == H5T_g.path[md]);
+        H5T__print_stats(table, &nprint/*in,out*/);
+        table->cdata.command = H5T_CONV_FREE;
+        if(table->conv.is_app) {
+            if((table->conv.u.app_func)((hid_t)FAIL, (hid_t)FAIL, &(table->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL, H5CX_get_dxpl()) < 0) {
+#ifdef H5T_DEBUG
+                if(H5DEBUG(T))
+                    fprintf(H5DEBUG(T), "H5T: conversion function 0x%08lx free failed for %s (ignored)\n",
+                            (unsigned long)(path->conv.u.app_func), path->name);
+#endif
+                H5E_clear_stack(NULL); /*ignore the failure*/
+            } /* end if */
+        } /* end if */
+        else
+            if((table->conv.u.lib_func)((hid_t)FAIL, (hid_t)FAIL, &(table->cdata), (size_t)0, (size_t)0, (size_t)0, NULL, NULL) < 0) {
 #ifdef H5T_DEBUG
-	    if(H5DEBUG(T)) {
-		fprintf(H5DEBUG(T), "H5T: conversion function 0x%08lx free "
-			"failed for %s (ignored)\n",
-			(unsigned long)(path->func), path->name);
-	    } /* end if */
+                if(H5DEBUG(T))
+                    fprintf(H5DEBUG(T), "H5T: conversion function 0x%08lx free failed for %s (ignored)\n",
+                            (unsigned long)(path->conv.u.lib_func), path->name);
 #endif
-	    H5E_clear_stack(NULL); /*ignore the failure*/
-	} /* end if */
-	if(table->src)
-            H5T_close(table->src);
-	if(table->dst)
-            H5T_close(table->dst);
+                H5E_clear_stack(NULL); /*ignore the failure*/
+            } /* end if */
+        if(table->src)
+            (void)H5T_close_real(table->src);
+        if(table->dst)
+            (void)H5T_close_real(table->dst);
         table = H5FL_FREE(H5T_path_t, table);
-	table = path;
-	H5T_g.path[md] = path;
-    } else if(path != table) {
-	HDassert(cmp);
+        table = path;
+        H5T_g.path[md] = path;
+    } /* end if */
+    else if(path != table) {
+        HDassert(cmp);
         if((size_t)H5T_g.npaths >= H5T_g.apaths) {
             size_t na = MAX(128, 2 * H5T_g.apaths);
             H5T_path_t **x;
 
             if(NULL == (x = (H5T_path_t **)H5MM_realloc(H5T_g.path, na * sizeof(H5T_path_t*))))
-		HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
             H5T_g.apaths = na;
             H5T_g.path = x;
         } /* end if */
@@ -4621,8 +4831,8 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
             md++;
         HDmemmove(H5T_g.path + md + 1, H5T_g.path + md, (size_t) (H5T_g.npaths - md) * sizeof(H5T_path_t*));
         H5T_g.npaths++;
-	H5T_g.path[md] = path;
-	table = path;
+        H5T_g.path[md] = path;
+        table = path;
     } /* end else-if */
 
     /* Set the flag to indicate both source and destination types are compound types
@@ -4635,10 +4845,10 @@ H5T_path_find(const H5T_t *src, const H5T_t *dst, const char *name,
 
 done:
     if(!ret_value && path && path != table) {
-	if(path->src)
-            H5T_close(path->src);
-	if(path->dst)
-            H5T_close(path->dst);
+        if(path->src)
+            (void)H5T_close_real(path->src);
+        if(path->dst)
+            (void)H5T_close_real(path->dst);
         path = H5FL_FREE(H5T_path_t, path);
     } /* end if */
     if(src_id >= 0)
@@ -4647,24 +4857,21 @@ done:
         H5I_dec_ref(dst_id);
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5T_path_find() */
+} /* end H5T__path_find_real() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_path_noop
+ * Function:  H5T_path_noop
  *
- * Purpose:	Is the path the special no-op path? The no-op function can be
- *              set by the application and there might be more than one no-op
- *              path in a multi-threaded application if one thread is using
- *              the no-op path when some other thread changes its definition.
+ * Purpose:   Is the path the special no-op path? The no-op function can be
+ *            set by the application and there might be more than one no-op
+ *            path in a multi-threaded application if one thread is using
+ *            the no-op path when some other thread changes its definition.
  *
- * Return:	TRUE/FALSE (can't fail)
- *
- * Programmer:	Quincey Koziol
- *		Thursday, May  8, 2003
- *
- * Modifications:
+ * Return:    TRUE/FALSE (can't fail)
  *
+ * Programmer:    Quincey Koziol
+ *        Thursday, May  8, 2003
  *-------------------------------------------------------------------------
  */
 hbool_t
@@ -4679,12 +4886,12 @@ H5T_path_noop(const H5T_path_t *p)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_path_compound_subset
+ * Function:  H5T_path_compound_subset
  *
- * Purpose:	Checks if the source and destination types are both compound.
- *              Tells whether whether the source members are a subset of
- *              destination, and the order is the same, and no conversion
- *              is needed.  For example:
+ * Purpose:   Checks if the source and destination types are both compound.
+ *            Tells whether whether the source members are a subset of
+ *            destination, and the order is the same, and no conversion
+ *            is needed.  For example:
  *                  struct source {            struct destination {
  *                      TYPE1 A;      -->          TYPE1 A;
  *                      TYPE2 B;      -->          TYPE2 B;
@@ -4693,11 +4900,11 @@ H5T_path_noop(const H5T_path_t *p)
  *                                                 TYPE5 E;
  *                                             };
  *
- * Return:	A pointer to the subset info struct in p, or NULL if there are
- *          no compounds.  Points directly into the H5T_path_t structure.
+ * Return:    A pointer to the subset info struct in p, or NULL if there are
+ *            no compounds.  Points directly into the H5T_path_t structure.
  *
- * Programmer:	Raymond Lu
- *		8 June 2007
+ * Programmer:    Raymond Lu
+ *        8 June 2007
  *
  * Modifications:  Neil Fortner
  *      19 September 2008
@@ -4723,17 +4930,14 @@ H5T_path_compound_subset(const H5T_path_t *p)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_path_bkg
+ * Function:  H5T_path_bkg
  *
- * Purpose:	Get the "background" flag for the conversion path.
+ * Purpose:   Get the "background" flag for the conversion path.
  *
- * Return:	Background flag (can't fail)
- *
- * Programmer:	Quincey Koziol
- *		Thursday, May  8, 2003
- *
- * Modifications:
+ * Return:    Background flag (can't fail)
  *
+ * Programmer:    Quincey Koziol
+ *        Thursday, May  8, 2003
  *-------------------------------------------------------------------------
  */
 H5T_bkg_t
@@ -4748,124 +4952,99 @@ H5T_path_bkg(const H5T_path_t *p)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_compiler_conv
- *
- * Purpose:	Private function for H5Tcompiler_conv.  Finds out whether the
- *              library's conversion function from type SRC to type DST
- *              is a hard conversion.
+ * Function:  H5T__compiler_conv
  *
- * Return:	TRUE:           hard conversion.
- *		FALSE:          soft conversion.
- *		FAIL:           function failed.
+ * Purpose:   Private function for H5Tcompiler_conv.  Finds out whether the
+ *            library's conversion function from type SRC to type DST
+ *            is a hard conversion.
  *
- * Programmer:	Raymond Lu
- *		Friday, Sept 2, 2005
- *
- * Modifications:
+ * Return:    TRUE:           hard conversion.
+ *            FALSE:          soft conversion.
+ *            FAIL:           function failed.
  *
+ * Programmer:    Raymond Lu
+ *        Friday, Sept 2, 2005
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5T_compiler_conv(H5T_t *src, H5T_t *dst)
+H5T__compiler_conv(H5T_t *src, H5T_t *dst)
 {
-    H5T_path_t	*path;
-    htri_t	ret_value = FAIL;       /* Return value */
+    H5T_path_t    *path;
+    htri_t    ret_value = FAIL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Find it */
-    if (NULL==(path=H5T_path_find(src, dst, NULL, NULL, H5AC_noio_dxpl_id, FALSE)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "conversion function not found")
+    if(NULL == (path = H5T_path_find(src, dst)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "conversion function not found")
 
     ret_value = (htri_t)path->is_hard;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5T__compiler_conv() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_convert
+ * Function:  H5T_convert
  *
- * Purpose:	Call a conversion function to convert from source to
- *		destination data type and accumulate timing statistics.
+ * Purpose:   Call a conversion function to convert from source to
+ *            destination data type and accumulate timing statistics.
  *
- * Return:	Success:	non-negative
+ * Return:    Success:    non-negative
  *
- *		Failure:	negative
+ *            Failure:    negative
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Tuesday, December 15, 1998
  *
- * Modifications:
- * 		Robb Matzke, 1999-06-16
- *		The timers are updated only if H5T debugging is enabled at
- *		runtime in addition to compile time.
- *
- *		Robb Matzke, 1999-06-16
- *		Added support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
- *
- *              Quincey Koziol, 1999-07-01
- *              Added dataset transfer properties, to allow custom VL
- *              datatype allocation function to be passed down to VL
- *              conversion routine.
- *
- *              Robb Matzke, 2000-05-17
- *              Added the BKG_STRIDE argument which gets passed to all the
- *              conversion functions. If BUF_STRIDE is non-zero then each
- *              data element is at a multiple of BUF_STRIDE bytes in BUF
- *              (on both input and output). If BKG_STRIDE is also set then
- *              the BKG buffer is used in such a way that temporary space
- *              for each element is aligned on a BKG_STRIDE byte boundary.
- *              If either BUF_STRIDE or BKG_STRIDE are zero then the BKG
- *              buffer will be accessed as though it were a packed array
- *              of destination datatype.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T_convert(H5T_path_t *tpath, hid_t src_id, hid_t dst_id, size_t nelmts,
-	    size_t buf_stride, size_t bkg_stride, void *buf, void *bkg,
-            hid_t dset_xfer_plist)
+    size_t buf_stride, size_t bkg_stride, void *buf, void *bkg)
 {
 #ifdef H5T_DEBUG
-    H5_timer_t		timer;
+    H5_timer_t        timer;
 #endif
-    herr_t      ret_value=SUCCEED;       /* Return value */
+    herr_t ret_value = SUCCEED;         /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
 #ifdef H5T_DEBUG
-    if (H5DEBUG(T)) H5_timer_begin(&timer);
+    if(H5DEBUG(T))
+        H5_timer_begin(&timer);
 #endif
     tpath->cdata.command = H5T_CONV_CONV;
-    if ((tpath->func)(src_id, dst_id, &(tpath->cdata), nelmts, buf_stride,
-                      bkg_stride, buf, bkg, dset_xfer_plist)<0)
-	HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "data type conversion failed");
+    if(tpath->conv.is_app) {
+        if((tpath->conv.u.app_func)(src_id, dst_id, &(tpath->cdata), nelmts, buf_stride, bkg_stride, buf, bkg, H5CX_get_dxpl()) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "datatype conversion failed")
+    } /* end if */
+    else
+        if((tpath->conv.u.lib_func)(src_id, dst_id, &(tpath->cdata), nelmts, buf_stride, bkg_stride, buf, bkg) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "datatype conversion failed")
 #ifdef H5T_DEBUG
-    if (H5DEBUG(T)) {
-	H5_timer_end(&(tpath->stats.timer), &timer);
-	tpath->stats.ncalls++;
-	tpath->stats.nelmts += nelmts;
-    }
+    if(H5DEBUG(T)) {
+        H5_timer_end(&(tpath->stats.timer), &timer);
+        tpath->stats.ncalls++;
+        tpath->stats.nelmts += nelmts;
+    } /* end if */
 #endif
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5T_convert() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_oloc
+ * Function:  H5T_oloc
  *
- * Purpose:	Returns a pointer to the object location for a named datatype.
+ * Purpose:   Returns a pointer to the object location for a named datatype.
  *
- * Return:	Success:	Ptr directly into named datatype
- *		Failure:	NULL
+ * Return:    Success:    Ptr directly into named datatype
+ *            Failure:    NULL
  *
- * Programmer:	Robb Matzke
+ * Programmer:    Robb Matzke
  *              Friday, June  5, 1998
  *
  *-------------------------------------------------------------------------
@@ -4899,14 +5078,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_nameof
+ * Function:  H5T_nameof
  *
- * Purpose:	Returns a pointer to the path for a named datatype.
+ * Purpose:   Returns a pointer to the path for a named datatype.
  *
- * Return:	Success:	Ptr directly into named datatype
- *		Failure:	NULL
+ * Return:    Success:    Ptr directly into named datatype
+ *            Failure:    NULL
  *
- * Programmer:	Quincey Koziol
+ * Programmer:    Quincey Koziol
  *              Monday, September 12, 2005
  *
  *-------------------------------------------------------------------------
@@ -4949,9 +5128,6 @@ done:
  *
  * Programmer:  Raymond Lu
  *              Friday, Dec 7, 2001
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 htri_t
@@ -4982,9 +5158,6 @@ done:
  *
  * Programmer:  Pedro Vicente
  *              Tuesday, Sep 3, 2002
- *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 htri_t
@@ -5007,9 +5180,9 @@ done:
  * Function:    H5T_convert_committed_datatype
  *
  * Purpose:     To convert the committed datatype "dt" to a transient embedded
- *		type if the file location associated with the committed datatype is 
- *		different from the parameter "f".  
- *		"f" is the file location where the dataset or attribute will be created.
+ *        type if the file location associated with the committed datatype is
+ *        different from the parameter "f".
+ *        "f" is the file location where the dataset or attribute will be created.
  *
  * Notes:       See HDFFV-9940
  *
@@ -5040,7 +5213,7 @@ H5T_convert_committed_datatype(H5T_t *dt, H5F_t *f)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, FAIL, "unable to reset path")
 
         dt->shared->state = H5T_STATE_TRANSIENT;
-    }
+    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -5048,25 +5221,17 @@ done:
 
 
 /*--------------------------------------------------------------------------
- NAME
-    H5T_get_ref_type
- PURPOSE
-    Retrieves the type of reference for a datatype
- USAGE
-    H5R_type_t H5Tget_ref_type(dt)
-        H5T_t *dt;  IN: datatype pointer for the reference datatype
-
- RETURNS
-    Success:	A reference type defined in H5Rpublic.h
-    Failure:	H5R_BADTYPE
- DESCRIPTION
-    Given a reference datatype object, this function returns the reference type
-        of the datatype.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
+ * Function:    H5T_get_ref_type
+ *
+ * Purpose:     Retrieves the type of reference for a datatype
+ *              H5T_t *dt;  IN: datatype pointer for the reference datatype
+ *
+ * Return:      Success:        A reference type defined in H5Rpublic.h
+ *              Failure:        H5R_BADTYPE
+ * Notes:       Given a reference datatype object, this function returns the reference type
+ *              of the datatype.
+ *--------------------------------------------------------------------------
+ */
 H5R_type_t
 H5T_get_ref_type(const H5T_t *dt)
 {
@@ -5085,26 +5250,23 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_is_sensible
+ * Function:  H5T_is_sensible
  *
- * Purpose:	Determines if a data type is sensible to store on disk
- *              (i.e. not partially initialized)
+ * Purpose:   Determines if a data type is sensible to store on disk
+ *            (i.e. not partially initialized)
  *
- * Return:	Success:	TRUE, FALSE
+ * Return:    Success:    TRUE, FALSE
  *
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *		Tuesday, June 11, 2002
- *
- * Modifications:
+ *            Failure:    Negative
  *
+ * Programmer:    Quincey Koziol
+ *        Tuesday, June 11, 2002
  *-------------------------------------------------------------------------
  */
 htri_t
 H5T_is_sensible(const H5T_t *dt)
 {
-    htri_t	ret_value = FAIL;       /* Return value */
+    htri_t    ret_value = FAIL;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -5168,18 +5330,15 @@ done:
  DESCRIPTION
     Recursively descends any VL or compound datatypes to mark all VL datatypes
     as either on disk or in memory.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
+ --------------------------------------------------------------------------
+ */
 htri_t
 H5T_set_loc(H5T_t *dt, H5F_t *f, H5T_loc_t loc)
 {
-    htri_t changed;    /* Whether H5T_set_loc changed the type (even if the size didn't change) */
-    htri_t ret_value = 0;   /* Indicate that success, but no location change */
-    unsigned i;             /* Local index variable */
-    size_t old_size;        /* Previous size of a field */
+    htri_t      changed;         /* Whether H5T_set_loc changed the type (even if the size didn't change) */
+    htri_t      ret_value = 0;   /* Indicate that success, but no location change */
+    unsigned    i;               /* Local index variable */
+    size_t      old_size;        /* Previous size of a field */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -5213,53 +5372,58 @@ H5T_set_loc(H5T_t *dt, H5F_t *f, H5T_loc_t loc)
 
             case H5T_COMPOUND:  /* Check each field and recurse on VL, compound and array type */
                 {
-                ssize_t accum_change = 0; /* Amount of change in the offset of the fields */
+                    ssize_t accum_change = 0; /* Amount of change in the offset of the fields */
 
-                /* Sort the fields based on offsets */
-                H5T__sort_value(dt, NULL);
+                    /* Sort the fields based on offsets */
+                    H5T__sort_value(dt, NULL);
 
-                for (i=0; i<dt->shared->u.compnd.nmembs; i++) {
-                    H5T_t *memb_type;   /* Member's datatype pointer */
+                    for (i = 0; i < dt->shared->u.compnd.nmembs; i++) {
+                        H5T_t *memb_type;   /* Member's datatype pointer */
 
-                    /* Range check against compound member's offset */
-                    if ((accum_change < 0) && ((ssize_t) dt->shared->u.compnd.memb[i].offset < accum_change))
-                        HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "invalid field size in datatype");
+                        /* Range check against compound member's offset */
+                        if ((accum_change < 0) && ((ssize_t) dt->shared->u.compnd.memb[i].offset < accum_change))
+                            HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "invalid field size in datatype");
 
-                    /* Apply the accumulated size change to the offset of the field */
-                    dt->shared->u.compnd.memb[i].offset += (size_t) accum_change;
+                        /* Apply the accumulated size change to the offset of the field */
+                        dt->shared->u.compnd.memb[i].offset += (size_t) accum_change;
 
-                    /* Set the member type pointer (for convenience) */
-                    memb_type=dt->shared->u.compnd.memb[i].type;
+                        /* Set the member type pointer (for convenience) */
+                        memb_type = dt->shared->u.compnd.memb[i].type;
 
-                    /* Recurse if it's VL, compound, enum or array */
-                    /* (If the force_conv flag is _not_ set, the type cannot change in size, so don't recurse) */
-                    if(memb_type->shared->force_conv && H5T_IS_COMPLEX(memb_type->shared->type)) {
-                        /* Keep the old field size for later */
-                        old_size=memb_type->shared->size;
+                        /* Recurse if it's VL, compound, enum or array */
+                        /* (If the force_conv flag is _not_ set, the type cannot change in size, so don't recurse) */
+                        if(memb_type->shared->force_conv && H5T_IS_COMPLEX(memb_type->shared->type)) {
+                            /* Keep the old field size for later */
+                            old_size = memb_type->shared->size;
 
-                        /* Mark the VL, compound, enum or array type */
-                        if((changed=H5T_set_loc(memb_type,f,loc))<0)
-                            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "Unable to set VL location");
-                        if(changed>0)
-                            ret_value=changed;
+                            /* Mark the VL, compound, enum or array type */
+                            if((changed = H5T_set_loc(memb_type,f,loc)) < 0)
+                                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "Unable to set VL location");
+                            if(changed > 0)
+                                ret_value = changed;
 
-                        /* Check if the field changed size */
-                        if(old_size != memb_type->shared->size) {
-                            /* Adjust the size of the member */
-                            dt->shared->u.compnd.memb[i].size = (dt->shared->u.compnd.memb[i].size*memb_type->shared->size)/old_size;
+                            /* Check if the field changed size */
+                            if(old_size != memb_type->shared->size) {
 
-                            /* Add that change to the accumulated size change */
-                            accum_change += (ssize_t) (memb_type->shared->size - old_size);
+                                /* Fail if the old_size is zero */
+                                if (0 == old_size)
+                                    HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "old_size of zero would cause division by zero");
+
+                                /* Adjust the size of the member */
+                                dt->shared->u.compnd.memb[i].size = (dt->shared->u.compnd.memb[i].size*memb_type->shared->size)/old_size;
+
+                                /* Add that change to the accumulated size change */
+                                accum_change += (ssize_t) (memb_type->shared->size - old_size);
+                            } /* end if */
                         } /* end if */
-                    } /* end if */
-                } /* end for */
+                    } /* end for */
 
-                /* Range check against datatype size */
-                if ((accum_change < 0) && ((ssize_t) dt->shared->size < accum_change))
-                    HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "invalid field size in datatype");
+                    /* Range check against datatype size */
+                    if ((accum_change < 0) && ((ssize_t) dt->shared->size < accum_change))
+                        HGOTO_ERROR(H5E_DATATYPE, H5E_BADVALUE, FAIL, "invalid field size in datatype");
 
-                /* Apply the accumulated size change to the datatype */
-                dt->shared->size += (size_t) accum_change;
+                    /* Apply the accumulated size change to the datatype */
+                    dt->shared->size += (size_t) accum_change;
                 }
                 break;
 
@@ -5267,29 +5431,29 @@ H5T_set_loc(H5T_t *dt, H5F_t *f, H5T_loc_t loc)
                 /* Recurse if it's VL, compound, enum or array */
                 /* (If the force_conv flag is _not_ set, the type cannot change in size, so don't recurse) */
                 if(dt->shared->parent->shared->force_conv && H5T_IS_COMPLEX(dt->shared->parent->shared->type)) {
-                    if((changed=H5T_set_loc(dt->shared->parent,f,loc))<0)
+                    if((changed = H5T_set_loc(dt->shared->parent,f,loc)) < 0)
                         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "Unable to set VL location");
-                    if(changed>0)
-                        ret_value=changed;
+                    if(changed > 0)
+                        ret_value = changed;
                 } /* end if */
 
                 /* Mark this VL sequence */
                 if((changed = H5T__vlen_set_loc(dt, f, loc)) < 0)
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "Unable to set VL location");
-                if(changed>0)
-                    ret_value=changed;
+                if(changed > 0)
+                    ret_value = changed;
                 break;
 
             case H5T_REFERENCE:
                 /* Only need to change location of object references */
-                if(dt->shared->u.atomic.u.r.rtype==H5R_OBJECT) {
+                if(dt->shared->u.atomic.u.r.rtype == H5R_OBJECT) {
                     /* Mark this reference */
-                    if(loc!=dt->shared->u.atomic.u.r.loc) {
+                    if(loc != dt->shared->u.atomic.u.r.loc) {
                         /* Set the location */
                         dt->shared->u.atomic.u.r.loc = loc;
 
                         /* Indicate that the location changed */
-                        ret_value=TRUE;
+                        ret_value = TRUE;
                     } /* end if */
                 } /* end if */
                 break;
@@ -5358,11 +5522,11 @@ done:
  * Purpose:     H5T__visit callback to Upgrade the version of a datatype
  *              (if there's any benefit to doing so)
  *
- * Note:	The behavior below is tightly coupled with the "better"
+ * Note:        The behavior below is tightly coupled with the "better"
  *              encodings for datatype messages in the datatype message
  *              encoding routine.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
  * Programmer:  Quincey Koziol
  *              Thursday, July 19, 2007
@@ -5417,7 +5581,7 @@ H5T_upgrade_version_cb(H5T_t *dt, void *op_value)
  *              doing so) and recursively apply to compound members and/or
  *              parent datatypes.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
  * Programmer:  Quincey Koziol
  *              Thursday, July 19, 2007
@@ -5444,34 +5608,44 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5T_set_latest_version
+ * Function:    H5T_set_version
  *
- * Purpose:     Set the encoding for a datatype to the latest version.
+ * Purpose:     Set the encoding for a datatype to the version indicated by
+ *              the file's low bound if that is higher than the datatype's 
+ *              version.
  *
- * Return:	Non-negative on success/Negative on failure
+ * Return:      Non-negative on success/Negative on failure
  *
- * Programmer:  Quincey Koziol
- *              Thursday, July 19, 2007
+ * Programmer:  Vailin Choi; December 2017
  *
  *-------------------------------------------------------------------------
  */
 herr_t
-H5T_set_latest_version(H5T_t *dt)
+H5T_set_version(H5F_t *f, H5T_t *dt)
 {
-    herr_t ret_value = SUCCEED;         /* Return value */
+    unsigned vers;                  /* The version */
+    herr_t ret_value = SUCCEED;     /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Sanity check */
+    HDassert(f);
     HDassert(dt);
 
-    /* Upgrade the format version for the datatype to the latest */
-    if(H5T__upgrade_version(dt, H5O_DTYPE_VERSION_LATEST) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't upgrade datatype encoding")
+    vers = H5O_dtype_ver_bounds[H5F_LOW_BOUND(f)];
+    if(vers > dt->shared->version) {
+        /* Upgrade the format version for the datatype */
+        if(H5T__upgrade_version(dt, vers) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't upgrade datatype encoding")
+    }
+    
+    /* Version bounds check */
+    if(dt->shared->version > H5O_dtype_ver_bounds[H5F_HIGH_BOUND(f)])
+        HGOTO_ERROR(H5E_DATATYPE, H5E_BADRANGE, FAIL, "Datatype version out of bounds")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5T_set_latest_version() */
+} /* end H5T_set_version() */
 
 
 /*-------------------------------------------------------------------------
@@ -5538,75 +5712,3 @@ H5T_patch_vlen_file(H5T_t *dt, H5F_t *f)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5T_patch_vlen_file() */
 
-
-/*-------------------------------------------------------------------------
- * Function:    H5Tflush
- *
- * Purpose:     Flushes all buffers associated with a named datatype to disk.
- *
- * Return:      Non-negative on success, negative on failure
- *
- * Programmer:  Mike McGreevy
- *              May 19, 2010
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5Tflush(hid_t type_id)
-{
-    H5T_t *dt; /* Datatype for this operation */
-    herr_t ret_value = SUCCEED; /* return value */
-
-    FUNC_ENTER_API(FAIL)
-    H5TRACE1("e", "i", type_id);
-    
-    /* Check args */
-    if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
-    if(!H5T_is_named(dt))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a committed datatype")
-
-    /* To flush metadata and invoke flush callback if there is */
-    if(H5O_flush_common(&dt->oloc, type_id, H5AC_ind_read_dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTFLUSH, FAIL, "unable to flush datatype and object flush callback")
-
-done:
-    FUNC_LEAVE_API(ret_value)
-} /* H5Tflush */
-
-
-/*-------------------------------------------------------------------------
- * Function:    H5Trefresh
- *
- * Purpose:     Refreshes all buffers associated with a named datatype.
- *
- * Return:      Non-negative on success, negative on failure
- *
- * Programmer:  Mike McGreevy
- *              July 21, 2010
- *
- *-------------------------------------------------------------------------
- */
-herr_t
-H5Trefresh(hid_t type_id)
-{
-    H5T_t * dt = NULL;
-    herr_t ret_value = SUCCEED; /* return value */
-    
-    FUNC_ENTER_API(FAIL)
-    H5TRACE1("e", "i", type_id);
-
-    /* Check args */
-    if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
-    if(!H5T_is_named(dt))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a committed datatype")
-
-    /* Call private function to refresh datatype object */
-    if ((H5O_refresh_metadata(type_id, dt->oloc, H5AC_ind_read_dxpl_id)) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTLOAD, FAIL, "unable to refresh datatype")
-
-done:
-    FUNC_LEAVE_API(ret_value)
-} /* H5Trefresh */
-
diff --git a/src/H5TS.c b/src/H5TS.c
index 7d46e95..d239e09 100644
--- a/src/H5TS.c
+++ b/src/H5TS.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* private headers */
@@ -36,6 +34,7 @@ H5TS_once_t H5TS_first_init_g = PTHREAD_ONCE_INIT;
 #endif /* H5_HAVE_WIN_THREADS */
 H5TS_key_t H5TS_errstk_key_g;
 H5TS_key_t H5TS_funcstk_key_g;
+H5TS_key_t H5TS_apictx_key_g;
 H5TS_key_t H5TS_cancel_key_g;
 
 
@@ -111,6 +110,9 @@ H5TS_pthread_first_thread_init(void)
     /* initialize key for thread-specific function stacks */
     pthread_key_create(&H5TS_funcstk_key_g, H5TS_key_destructor);
 
+    /* initialize key for thread-specific API contexts */
+    pthread_key_create(&H5TS_apictx_key_g, H5TS_key_destructor);
+
     /* initialize key for thread cancellability mechanism */
     pthread_key_create(&H5TS_cancel_key_g, H5TS_key_destructor);
 }
@@ -264,8 +266,7 @@ H5TS_cancel_count_inc(void)
         cancel_counter = (H5TS_cancel_t *)HDcalloc(1, sizeof(H5TS_cancel_t));
 
         if (!cancel_counter) {
-            H5E_push_stack(NULL, "H5TS_cancel_count_inc", __FILE__, __LINE__,
-                H5E_ERR_CLS_g, H5E_RESOURCE, H5E_NOSPACE, "memory allocation failed");
+            HERROR(H5E_RESOURCE, H5E_NOSPACE, "memory allocation failed");
             return FAIL;
         }
 
@@ -358,6 +359,10 @@ H5TS_win32_process_enter(PINIT_ONCE InitOnce, PVOID Parameter, PVOID *lpContex)
         ret_value = FALSE;
 #endif /* H5_HAVE_CODESTACK */
 
+    /* Set up thread local storage */
+    if(TLS_OUT_OF_INDEXES == (H5TS_apictx_key_g = TlsAlloc()))
+        ret_value = FALSE;
+
     return ret_value;
 } /* H5TS_win32_process_enter() */
 #endif /* H5_HAVE_WIN_THREADS */
@@ -428,6 +433,9 @@ H5TS_win32_process_exit(void)
     TlsFree(H5TS_funcstk_key_g);
 #endif /* H5_HAVE_CODESTACK */
 
+    /* Clean up per-process thread local storage */
+    TlsFree(H5TS_apictx_key_g);
+
     return;
 } /* H5TS_win32_process_exit() */
 #endif /* H5_HAVE_WIN_THREADS */
@@ -471,6 +479,11 @@ H5TS_win32_thread_exit(void)
         LocalFree((HLOCAL)lpvData);
 #endif /* H5_HAVE_CODESTACK */
 
+    /* Clean up per-thread thread local storage */
+    lpvData = TlsGetValue(H5TS_apictx_key_g);
+    if(lpvData)
+        LocalFree((HLOCAL)lpvData);
+
     return ret_value;
 } /* H5TS_win32_thread_exit() */
 #endif /* H5_HAVE_WIN_THREADS */
diff --git a/src/H5TSprivate.h b/src/H5TSprivate.h
index 5394b77..8d74676 100644
--- a/src/H5TSprivate.h
+++ b/src/H5TSprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -111,6 +109,7 @@ typedef pthread_once_t H5TS_once_t;
 extern H5TS_once_t H5TS_first_init_g;
 extern H5TS_key_t H5TS_errstk_key_g;
 extern H5TS_key_t H5TS_funcstk_key_g;
+extern H5TS_key_t H5TS_apictx_key_g;
 
 #if defined c_plusplus || defined __cplusplus
 extern      "C"
diff --git a/src/H5Tarray.c b/src/H5Tarray.c
index 4b2c7cf..60b3d43 100644
--- a/src/H5Tarray.c
+++ b/src/H5Tarray.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -102,33 +100,32 @@ H5Tarray_create2(hid_t base_id, unsigned ndims, const hsize_t dim[/* ndims */])
     unsigned    u;              /* local index variable */
     hid_t	ret_value;	/* return value	*/
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "iIu*h", base_id, ndims, dim);
 
     /* Check args */
     if(ndims < 1 || ndims > H5S_MAX_RANK)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid dimensionality")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid dimensionality")
     if(!dim)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no dimensions specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "no dimensions specified")
     for(u = 0; u < ndims; u++)
         if(!(dim[u] > 0))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "zero-sized dimension specified")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "zero-sized dimension specified")
     if(NULL == (base = (H5T_t *)H5I_object_verify(base_id, H5I_DATATYPE)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an valid base datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not an valid base datatype")
 
     /* Create the array datatype */
     if(NULL == (dt = H5T__array_create(base, ndims, dim)))
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to create datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to create datatype")
 
     /* Atomize the type */
     if((ret_value = H5I_register(H5I_DATATYPE, dt, TRUE)) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register datatype")
 
 done:
-    if(ret_value < 0) {
-        if(dt && H5T_close(dt) < 0)
-            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "can't release datatype")
-    } /* end if */
+    if(ret_value < 0)
+        if(dt && H5T_close_real(dt) < 0)
+            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, H5I_INVALID_HID, "can't release datatype")
 
     FUNC_LEAVE_API(ret_value)
 }   /* end H5Tarray_create2() */
@@ -358,33 +355,32 @@ H5Tarray_create1(hid_t base_id, int ndims, const hsize_t dim[/* ndims */],
     unsigned    u;              /* local index variable */
     hid_t	ret_value;	/* return value	*/
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE4("i", "iIs*h*Is", base_id, ndims, dim, perm);
 
     /* Check args */
     if(ndims < 1 || ndims > H5S_MAX_RANK)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid dimensionality")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid dimensionality")
     if(!dim)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no dimensions specified")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "no dimensions specified")
     for(u = 0; u < (unsigned)ndims; u++)
         if(!(dim[u] > 0))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "zero-sized dimension specified")
+            HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "zero-sized dimension specified")
     if(NULL == (base = (H5T_t *)H5I_object_verify(base_id, H5I_DATATYPE)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an valid base datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not an valid base datatype")
 
     /* Create the array datatype */
     if(NULL == (dt = H5T__array_create(base, (unsigned)ndims, dim)))
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to create datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to create datatype")
 
     /* Atomize the type */
     if((ret_value = H5I_register(H5I_DATATYPE, dt, TRUE)) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register datatype")
 
 done:
-    if(ret_value < 0) {
-        if(dt && H5T_close(dt) < 0)
-            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, FAIL, "can't release datatype")
-    } /* end if */
+    if(ret_value < 0)
+        if(dt && H5T_close_real(dt) < 0)
+            HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, H5I_INVALID_HID, "can't release datatype")
 
     FUNC_LEAVE_API(ret_value)
 }   /* end H5Tarray_create1() */
diff --git a/src/H5Tbit.c b/src/H5Tbit.c
index a6b917f..df6d2c3 100644
--- a/src/H5Tbit.c
+++ b/src/H5Tbit.c
@@ -5,18 +5,15 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
-/*
- * Module Info:	Operations on bit vectors.  A bit vector is an array of bytes
- *		with the least-significant bits in the first byte.  That is,
- *		the bytes are in little-endian order.
+/* Module Info: Operations on bit vectors.  A bit vector is an array of bytes
+ *              with the least-significant bits in the first byte.  That is,
+ *              the bytes are in little-endian order.
  */
 
 #include "H5Tmodule.h"          /* This source code file is part of the H5T module */
@@ -31,14 +28,11 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_copy
+ * Function:    H5T__bit_copy
  *
- * Purpose:	Copies bits from one vector to another.
+ * Purpose:     Copies bits from one vector to another.
  *
- * Return:	void
- *
- * Programmer:	Robb Matzke
- *              Wednesday, June 10, 1998
+ * Return:      void
  *
  *-------------------------------------------------------------------------
  */
@@ -52,8 +46,7 @@ H5T__bit_copy(uint8_t *dst, size_t dst_offset, const uint8_t *src,
 
     FUNC_ENTER_PACKAGE_NOERR
 
-    /*
-     * Normalize the offset to be a byte number and a bit offset within that
+    /* Normalize the offset to be a byte number and a bit offset within that
      * byte.
      */
     s_idx = src_offset / 8;
@@ -61,8 +54,7 @@ H5T__bit_copy(uint8_t *dst, size_t dst_offset, const uint8_t *src,
     src_offset %= 8;
     dst_offset %= 8;
 
-    /*
-     * Get things rolling. This means copying bits until we're aligned on a
+    /* Get things rolling. This means copying bits until we're aligned on a
      * source byte.  This the following example, five bits are copied to the
      * destination.
      *
@@ -77,30 +69,29 @@ H5T__bit_copy(uint8_t *dst, size_t dst_offset, const uint8_t *src,
      *      ...+---------------+---------------+
      *           dst[d_idx+1]      dst[d_idx]
      */
-    while(src_offset && size > 0) {
-	size_t nbits = MIN3(size, 8 - dst_offset, 8 - src_offset);
-	size_t mask = ((size_t)1 << nbits) - 1;
-
-	dst[d_idx] &= (uint8_t)~(mask << dst_offset);
-	dst[d_idx] = (uint8_t)(dst[d_idx] | (((src[s_idx] >> src_offset) & (uint8_t)mask) << dst_offset));
-
-	src_offset += nbits;
-	if(src_offset >= 8) {
-	    s_idx++;
-	    src_offset %= 8;
-	} /* end if */
-
-	dst_offset += nbits;
-	if(dst_offset >= 8) {
-	    d_idx++;
-	    dst_offset %= 8;
-	} /* end if */
-
-	size -= nbits;
-    } /* end while */
-
-    /*
-     * The middle bits. We are aligned on a source byte which needs to be
+    while (src_offset && size > 0) {
+        size_t nbits = MIN3(size, 8 - dst_offset, 8 - src_offset);
+        size_t mask = ((size_t)1 << nbits) - 1;
+
+        dst[d_idx] &= (uint8_t)~(mask << dst_offset);
+        dst[d_idx] = (uint8_t)(dst[d_idx] | (((src[s_idx] >> src_offset) & (uint8_t)mask) << dst_offset));
+
+        src_offset += nbits;
+        if (src_offset >= 8) {
+            s_idx++;
+            src_offset %= 8;
+        }
+
+        dst_offset += nbits;
+        if (dst_offset >= 8) {
+            d_idx++;
+            dst_offset %= 8;
+        }
+
+        size -= nbits;
+    }
+
+    /* The middle bits. We are aligned on a source byte which needs to be
      * copied to two (or one in the degenerate case) destination bytes.
      *
      * 		      src[s_idx]
@@ -124,48 +115,48 @@ H5T__bit_copy(uint8_t *dst, size_t dst_offset, const uint8_t *src,
     mask_lo = ((size_t)1 << (8 - shift)) - 1;
     mask_hi = (~mask_lo) & 0xff;
 
-    for(/*void*/; size > 8; size -= 8, d_idx++, s_idx++) {
-	if(shift) {
-	    dst[d_idx + 0] &= (uint8_t)(~(mask_lo << shift));
-	    dst[d_idx + 0] |= (uint8_t)((src[s_idx] & mask_lo) << shift);
-	    dst[d_idx + 1] &= (uint8_t)(~(mask_hi >> (8 - shift)));
-	    dst[d_idx + 1] |= (uint8_t)((src[s_idx] & mask_hi) >> (8 - shift));
-	} /* end if */
+    for (/*void*/; size > 8; size -= 8, d_idx++, s_idx++) {
+        if (shift) {
+            dst[d_idx + 0] &= (uint8_t)(~(mask_lo << shift));
+            dst[d_idx + 0] |= (uint8_t)((src[s_idx] & mask_lo) << shift);
+            dst[d_idx + 1] &= (uint8_t)(~(mask_hi >> (8 - shift)));
+            dst[d_idx + 1] |= (uint8_t)((src[s_idx] & mask_hi) >> (8 - shift));
+        }
         else
-	    dst[d_idx] = src[s_idx];
-    } /* end for */
+            dst[d_idx] = src[s_idx];
+    }
 
     /* Finish up */
-    while(size > 0) {
-	size_t nbits = (size_t)MIN3 (size, 8 - dst_offset, 8 - src_offset);
-	size_t mask = ((size_t)1 << nbits) - 1;
+    while (size > 0) {
+        size_t nbits = (size_t)MIN3 (size, 8 - dst_offset, 8 - src_offset);
+        size_t mask = ((size_t)1 << nbits) - 1;
 
-	dst[d_idx] &= (uint8_t)(~(mask << dst_offset));
-	dst[d_idx] = (uint8_t)(dst[d_idx] | (((src[s_idx] >> src_offset) & (uint8_t)mask) << dst_offset));
+        dst[d_idx] &= (uint8_t)(~(mask << dst_offset));
+        dst[d_idx] = (uint8_t)(dst[d_idx] | (((src[s_idx] >> src_offset) & (uint8_t)mask) << dst_offset));
 
-	src_offset += nbits;
-	if(src_offset >= 8) {
-	    s_idx++;
-	    src_offset %= 8;
-	} /* end if */
+        src_offset += nbits;
+        if (src_offset >= 8) {
+            s_idx++;
+            src_offset %= 8;
+        }
 
-	dst_offset += nbits;
-	if(dst_offset >= 8) {
-	    d_idx++;
-	    dst_offset %= 8;
-	} /* end if */
+        dst_offset += nbits;
+        if (dst_offset >= 8) {
+            d_idx++;
+            dst_offset %= 8;
+        }
 
-	size -= nbits;
-    } /* end while */
+        size -= nbits;
+    }
 
     FUNC_LEAVE_NOAPI_VOID
 } /* end H5T__bit_copy() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_shift
+ * Function:    H5T__bit_shift
  *
- * Purpose:	Simulation of hardware shifting.  Shifts a bit vector
+ * Purpose:     Simulation of hardware shifting.  Shifts a bit vector
  *              in a way similar to shifting a variable value, like
  *              value <<= 3, or value >>= 16.  SHIFT_DIST is positive for
  *              left shift, negative for right shift.  The bit vector starts
@@ -175,10 +166,7 @@ H5T__bit_copy(uint8_t *dst, size_t dst_offset, const uint8_t *src,
  *              For example, if we have a bit sequence 00011100, offset=2,
  *              size=3, shift_dist=2, the result will be 00010000.
  *
- * Return:	void
- *
- * Programmer:	Raymond Lu
- *              Monday, April 12, 2004
+ * Return:      void
  *
  *-------------------------------------------------------------------------
  */
@@ -195,25 +183,25 @@ H5T__bit_shift(uint8_t *buf, ssize_t shift_dist, size_t offset, size_t size)
     HDassert(buf);
     HDassert(size);
 
-    if(shift_dist) {
+    if (shift_dist) {
         size_t abs_shift_dist = (size_t)ABS(shift_dist);
 
-        if(abs_shift_dist >= size)
+        if (abs_shift_dist >= size)
             H5T__bit_set(buf, offset, size, 0);
         else {
             size_t buf_size = (size / 8) + 1;   /* Size of shift buffer needed */
             uint8_t *shift_buf;                 /* Pointer to shift buffer */
 
             /* Wrap the local buffer for serialized header info */
-            if(NULL == (wb = H5WB_wrap(tmp_buf, sizeof(tmp_buf))))
+            if (NULL == (wb = H5WB_wrap(tmp_buf, sizeof(tmp_buf))))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "can't wrap buffer")
 
             /* Get a pointer to a buffer that's large enough  */
-            if(NULL == (shift_buf = (uint8_t *)H5WB_actual(wb, buf_size)))
+            if (NULL == (shift_buf = (uint8_t *)H5WB_actual(wb, buf_size)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_NOSPACE, FAIL, "can't get actual buffer")
 
             /* Shift vector by making copies */
-            if(shift_dist > 0) { /* left shift */
+            if (shift_dist > 0) { /* left shift */
                 /* Copy part to be shifted to a temporary buffer */
                 H5T__bit_copy(shift_buf, (size_t)0, buf, offset, size - abs_shift_dist);
 
@@ -222,18 +210,18 @@ H5T__bit_shift(uint8_t *buf, ssize_t shift_dist, size_t offset, size_t size)
 
                 /* Zero-set the left part*/
                 H5T__bit_set(buf, offset, abs_shift_dist, 0);
-            } /* end if */
+            }
             else { /* right shift */
                 H5T__bit_copy(shift_buf, (size_t)0, buf, offset + abs_shift_dist, size - abs_shift_dist);
                 H5T__bit_copy(buf, offset, shift_buf, (size_t)0, size - abs_shift_dist);
                 H5T__bit_set(buf, offset + size - abs_shift_dist, abs_shift_dist, 0);
-            } /* end else */
+            }
         } /* end else */
     } /* end if */
 
 done:
     /* Release resources */
-    if(wb && H5WB_unwrap(wb) < 0)
+    if (wb && H5WB_unwrap(wb) < 0)
         HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, FAIL, "can't close wrapped buffer")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -241,27 +229,24 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_get_d
+ * Function:    H5T__bit_get_d
  *
- * Purpose:	Return a small bit sequence as a number.  Bit vector starts
+ * Purpose:     Return a small bit sequence as a number.  Bit vector starts
  *              at OFFSET and is SIZE bits long.
  *
- * Return:	Success:	The bit sequence interpretted as an unsigned
- *				integer.
- *
- *		Failure:	0
+ * Return:      Success:    The bit sequence interpretted as an unsigned
+ *                          integer.
  *
- * Programmer:	Robb Matzke
- *              Tuesday, June 23, 1998
+ *              Failure:    0
  *
  *-------------------------------------------------------------------------
  */
 uint64_t
 H5T__bit_get_d(uint8_t *buf, size_t offset, size_t size)
 {
-    uint64_t	val = 0;
-    size_t	i, hs;
-    uint64_t	ret_value = 0;  /* Return value */
+    uint64_t    val = 0;
+    size_t      i, hs;
+    uint64_t    ret_value = 0;  /* Return value */
 
     FUNC_ENTER_PACKAGE_NOERR
 
@@ -273,11 +258,11 @@ H5T__bit_get_d(uint8_t *buf, size_t offset, size_t size)
             break;
 
         case H5T_ORDER_BE:
-            for(i = 0, hs = sizeof(val) / 2; i < hs; i++) {
+            for (i = 0, hs = sizeof(val) / 2; i < hs; i++) {
                 uint8_t tmp = ((uint8_t*)&val)[i];
                 ((uint8_t*)&val)[i] = ((uint8_t*)&val)[sizeof(val) - (i + 1)];
                 ((uint8_t*)&val)[sizeof(val) - (i + 1)] = tmp;
-            } /* end for */
+            }
             break;
 
         case H5T_ORDER_ERROR:
@@ -287,7 +272,7 @@ H5T__bit_get_d(uint8_t *buf, size_t offset, size_t size)
         default:
             /* Unknown endianness. Bail out. */
             HGOTO_DONE(UFAIL)
-    } /* end switch */
+    }
 
     /* Set return value */
     ret_value = val;
@@ -298,14 +283,11 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_set_d
+ * Function:    H5T__bit_set_d
  *
- * Purpose:	Sets part of a bit vector to the specified unsigned value.
+ * Purpose:     Sets part of a bit vector to the specified unsigned value.
  *
- * Return:	void
- *
- * Programmer:	Robb Matzke
- *              Wednesday, June 24, 1998
+ * Return:      void
  *
  *-------------------------------------------------------------------------
  */
@@ -323,11 +305,11 @@ H5T__bit_set_d(uint8_t *buf, size_t offset, size_t size, uint64_t val)
             break;
 
         case H5T_ORDER_BE:
-            for(i = 0, hs = sizeof(val) / 2; i < hs; i++) {
+            for (i = 0, hs = sizeof(val) / 2; i < hs; i++) {
                 uint8_t tmp = ((uint8_t *)&val)[i];
                 ((uint8_t *)&val)[i] = ((uint8_t *)&val)[sizeof(val) - (i + 1)];
                 ((uint8_t *)&val)[sizeof(val) - (i + 1)] = tmp;
-            } /* end for */
+            }
             break;
 
         case H5T_ORDER_ERROR:
@@ -336,7 +318,7 @@ H5T__bit_set_d(uint8_t *buf, size_t offset, size_t size, uint64_t val)
         case H5T_ORDER_MIXED:
         default:
             HDabort();
-    } /* end switch */
+    }
 
     H5T__bit_copy(buf, offset, (uint8_t*)&val, (size_t)0, size);
 
@@ -345,24 +327,19 @@ H5T__bit_set_d(uint8_t *buf, size_t offset, size_t size, uint64_t val)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_set
+ * Function:    H5T__bit_set
  *
- * Purpose:	Sets or clears bits in a contiguous region of a vector
- *		beginning at bit OFFSET and continuing for SIZE bits.
+ * Purpose:     Sets or clears bits in a contiguous region of a vector
+ *              beginning at bit OFFSET and continuing for SIZE bits.
  *
- * Return:	void
- *
- * Programmer:	Robb Matzke
- *              Wednesday, June 10, 1998
- *
- * Modifications:
+ * Return:      void
  *
  *-------------------------------------------------------------------------
  */
 void
 H5T__bit_set(uint8_t *buf, size_t offset, size_t size, hbool_t value)
 {
-    int	idx;
+    int     idx;
 
     FUNC_ENTER_PACKAGE_NOERR
 
@@ -371,54 +348,51 @@ H5T__bit_set(uint8_t *buf, size_t offset, size_t size, hbool_t value)
     offset %= 8;
 
     /* The first partial byte */
-    if(size && offset % 8) {
-	size_t nbits = MIN(size, 8 - offset);
-	unsigned mask = ((unsigned)1 << nbits) - 1;
+    if (size && offset % 8) {
+        size_t nbits = MIN(size, 8 - offset);
+        unsigned mask = ((unsigned)1 << nbits) - 1;
 
-	if(value)
-	    buf[idx] = (uint8_t)(buf[idx] | (mask << offset));
-	else
-	    buf[idx] &= (uint8_t)(~(mask << offset));
+        if (value)
+            buf[idx] = (uint8_t)(buf[idx] | (mask << offset));
+        else
+            buf[idx] &= (uint8_t)(~(mask << offset));
 
-	idx++;
-	size -= nbits;
-    } /* end if */
+        idx++;
+        size -= nbits;
+    }
 
     /* The middle bytes */
-    while(size >= 8) {
-	buf[idx++] = value ? 0xff : 0x00;
-	size -= 8;
-    } /* end while */
+    while (size >= 8) {
+        buf[idx++] = value ? 0xff : 0x00;
+        size -= 8;
+    }
 
     /* The last partial byte */
-    if(size) {
-	if(value)
-	    buf[idx] |= (uint8_t)(((unsigned)1 << size) - 1);
-	else
-	    buf[idx] &= (uint8_t)(~(((unsigned)1 << size) - 1));
-    } /* end if */
+    if (size) {
+        if (value)
+            buf[idx] |= (uint8_t)(((unsigned)1 << size) - 1);
+        else
+            buf[idx] &= (uint8_t)(~(((unsigned)1 << size) - 1));
+    }
 
     FUNC_LEAVE_NOAPI_VOID
 } /* end H5T__bit_set() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_find
+ * Function:    H5T__bit_find
  *
- * Purpose:	Finds the first bit with the specified VALUE within a region
- *		of a bit vector.  The region begins at OFFSET and continues
- *		for SIZE bits, but the region can be searched from the least
- *		significat end toward the most significant end(H5T_BIT_LSB
- *		as DIRECTION), or from the most significant end to the least
- *		significant end(H5T_BIT_MSB as DIRECTION).
+ * Purpose:     Finds the first bit with the specified VALUE within a region
+ *              of a bit vector.  The region begins at OFFSET and continues
+ *              for SIZE bits, but the region can be searched from the least
+ *              significat end toward the most significant end(H5T_BIT_LSB
+ *              as DIRECTION), or from the most significant end to the least
+ *              significant end(H5T_BIT_MSB as DIRECTION).
  *
- * Return:	Success:	The position of the bit found, relative to
- *				the offset.
+ * Return:      Success:    The position of the bit found, relative to
+ *                          the offset.
  *
- *		Failure:	-1
- *
- * Programmer:	Robb Matzke
- *              Wednesday, June 10, 1998
+ *              Failure:    -1
  *
  *-------------------------------------------------------------------------
  */
@@ -426,9 +400,9 @@ ssize_t
 H5T__bit_find(uint8_t *buf, size_t offset, size_t size, H5T_sdir_t direction,
 	      hbool_t value)
 {
-    ssize_t	base = (ssize_t)offset;
-    ssize_t	idx, i;
-    size_t	iu;
+    ssize_t     base = (ssize_t)offset;
+    ssize_t     idx, i;
+    size_t      iu;
     ssize_t     ret_value = (-1);         /* Return value */
 
     /* Use FUNC_ENTER_PACKAGE_NOERR here to avoid performance issues */
@@ -437,16 +411,16 @@ H5T__bit_find(uint8_t *buf, size_t offset, size_t size, H5T_sdir_t direction,
     /* Some functions call this with value=TRUE */
     HDassert(TRUE == 1);
 
-    switch(direction) {
+    switch (direction) {
         case H5T_BIT_LSB:
             /* Calculate index */
             idx = (ssize_t)(offset / 8);
             offset %= 8;
 
             /* Beginning */
-            if(offset) {
-                for(iu = offset; iu < 8 && size > 0; iu++, size--)
-                    if(value == (hbool_t)((buf[idx] >> iu) & 0x01))
+            if (offset) {
+                for (iu = offset; iu < 8 && size > 0; iu++, size--)
+                    if (value == (hbool_t)((buf[idx] >> iu) & 0x01))
                         HGOTO_DONE(8 * idx + (ssize_t)iu - base);
 
                 offset = 0;
@@ -454,10 +428,10 @@ H5T__bit_find(uint8_t *buf, size_t offset, size_t size, H5T_sdir_t direction,
             } /* end if */
 
             /* Middle */
-            while(size >= 8) {
-                if((value ? 0x00 : 0xff) != buf[idx])
-                    for(i = 0; i < 8; i++)
-                        if(value == (hbool_t)((buf[idx] >> i) & 0x01))
+            while (size >= 8) {
+                if ((value ? 0x00 : 0xff) != buf[idx])
+                    for (i = 0; i < 8; i++)
+                        if (value == (hbool_t)((buf[idx] >> i) & 0x01))
                             HGOTO_DONE(8 * idx + i - base);
 
                 size -= 8;
@@ -465,8 +439,8 @@ H5T__bit_find(uint8_t *buf, size_t offset, size_t size, H5T_sdir_t direction,
             } /* end while */
 
             /* End */
-            for(i = 0; i < (ssize_t)size; i++)
-                if(value == (hbool_t)((buf[idx] >> i) & 0x01))
+            for (i = 0; i < (ssize_t)size; i++)
+                if (value == (hbool_t)((buf[idx] >> i) & 0x01))
                     HGOTO_DONE(8 * idx + i - base);
             break;
 
@@ -476,19 +450,19 @@ H5T__bit_find(uint8_t *buf, size_t offset, size_t size, H5T_sdir_t direction,
             offset %= 8;
 
             /* Beginning */
-            if(size > 8 - offset && (offset + size) % 8) {
-                for(iu = (offset + size) % 8; iu > 0; --iu, --size)
-                    if(value == (hbool_t)((buf[idx] >> (iu - 1)) & 0x01))
+            if (size > 8 - offset && (offset + size) % 8) {
+                for (iu = (offset + size) % 8; iu > 0; --iu, --size)
+                    if (value == (hbool_t)((buf[idx] >> (iu - 1)) & 0x01))
                         HGOTO_DONE(8 * idx + (ssize_t)(iu - 1) - base);
 
                 --idx;
             } /* end if */
 
             /* Middle */
-            while(size >= 8) {
-                if((value ? 0x00 : 0xff) != buf[idx]) {
-                    for(i = 7; i >= 0; --i)
-                        if(value == (hbool_t)((buf[idx] >> i) & 0x01))
+            while (size >= 8) {
+                if ((value ? 0x00 : 0xff) != buf[idx]) {
+                    for (i = 7; i >= 0; --i)
+                        if (value == (hbool_t)((buf[idx] >> i) & 0x01))
                             HGOTO_DONE(8 * idx + i - base);
                 } /* end if */
 
@@ -497,11 +471,11 @@ H5T__bit_find(uint8_t *buf, size_t offset, size_t size, H5T_sdir_t direction,
             } /* end while */
 
             /* End */
-            if(size > 0) {
-                for(iu = offset + size; iu > offset; --iu)
-                    if(value == (hbool_t)((buf[idx] >> (iu - 1)) & 0x01))
+            if (size > 0) {
+                for (iu = offset + size; iu > offset; --iu)
+                    if (value == (hbool_t)((buf[idx] >> (iu - 1)) & 0x01))
                         HGOTO_DONE(8 * idx + (ssize_t)(iu - 1) - base);
-            } /* end if */
+            }
             break;
 
         default:
@@ -521,17 +495,14 @@ done:
  *
  * Return:      The carry-out value.  TRUE if overflows, FALSE otherwise.
  *
- * Programmer:	Robb Matzke
- *              Friday, June 26, 1998
- *
  *-------------------------------------------------------------------------
  */
 hbool_t
 H5T__bit_inc(uint8_t *buf, size_t start, size_t size)
 {
-    size_t	idx = start / 8;
-    unsigned	carry = 1;
-    unsigned	acc, mask;
+    size_t      idx = start / 8;
+    unsigned    carry = 1;
+    unsigned    acc, mask;
 
     /* Use FUNC_ENTER_PACKAGE_NOERR here to avoid performance issues */
     FUNC_ENTER_PACKAGE_NOERR
@@ -541,7 +512,7 @@ H5T__bit_inc(uint8_t *buf, size_t start, size_t size)
     start %= 8;
 
     /* The first partial byte */
-    if(start) {
+    if (start) {
         if(size + start < 8)
             mask = ((unsigned)1 << size) - 1;
         else
@@ -554,34 +525,34 @@ H5T__bit_inc(uint8_t *buf, size_t start, size_t size)
         size -= MIN(size, 8 - start);
         start = 0;
         idx++;
-    } /* end if */
+    }
 
     /* The middle */
-    while(carry && size >= 8) {
+    while (carry && size >= 8) {
         acc = buf[idx];
         acc++;
         carry = acc & 0x100;
         buf[idx] = acc & 0xff;
         idx++;
         size -= 8;
-    } /* end while */
+    }
 
     /* The last bits */
-    if(carry && size > 0) {
+    if (carry && size > 0) {
         mask = ((unsigned)1 << size) - 1;
         acc = buf[idx] & mask;
         acc++;
         carry = acc & ((unsigned)1 << size);
         buf[idx] &= (uint8_t)(~mask);
         buf[idx] |= (uint8_t)(acc & mask);
-    } /* end if */
+    }
 
     FUNC_LEAVE_NOAPI(carry ? TRUE : FALSE)
 } /* end H5T__bit_inc() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_dec
+ * Function:    H5T__bit_dec
  *
  * Purpose:     Decrement part of a bit field by substracting 1.  The bit
  *              field starts with bit position START and is SIZE bits long.
@@ -589,18 +560,15 @@ H5T__bit_inc(uint8_t *buf, size_t start, size_t size)
  * Return:      The "borrow-in" value. It's TRUE if underflows, FALSE
  *              otherwise.
  *
- * Programmer:  Raymond Lu
- *              March 17, 2004
- *
  *-------------------------------------------------------------------------
  */
 hbool_t
 H5T__bit_dec(uint8_t *buf, size_t start, size_t size)
 {
-    size_t	idx = start / 8;
+    size_t      idx = start / 8;
     size_t      pos = start % 8;
     uint8_t     tmp;
-    unsigned	borrow = 0;
+    unsigned    borrow = 0;
 
     /* Use FUNC_ENTER_PACKAGE_NOERR here to avoid performance issues */
     FUNC_ENTER_PACKAGE_NOERR
@@ -609,71 +577,72 @@ H5T__bit_dec(uint8_t *buf, size_t start, size_t size)
     HDassert(size);
 
     /* The first partial byte */
-    if((size + start - 1) / 8 > idx) { /*bit sequence doesn't end in the same byte as starts*/
+    if ((size + start - 1) / 8 > idx) {
+        /* The bit sequence doesn't end in the same byte as starts */
+
         /* Example:  a sequence like 11000100 and start = 3.  We substract 00001000 from
          * it and get 10111100.  If a sequence is 00000111, we do right shift for START
          * bits and get 00000000.  So we need to borrow from higher byte when we substract
          * 00001000.
          */
-        if(!(buf[idx] >> pos))
+        if (!(buf[idx] >> pos))
             borrow = 1;
         buf[idx] = (uint8_t)(buf[idx] - (1 << pos));
         idx++;
         size -= (8 - pos);
 
         /* The middle bytes */
-        while(borrow && size >= 8) {
-            if(buf[idx])
+        while (borrow && size >= 8) {
+            if (buf[idx])
                 borrow = 0;
             buf[idx]--;
 
             idx++;
             size -= 8;
-        } /* end while */
+        }
 
         /* The last partial byte */
-        if(borrow && size > 0) {
+        if (borrow && size > 0) {
             /* Similar to the first byte case, where sequence ends in the same byte as starts */
             tmp = buf[idx];
             buf[idx]--;
-            if((buf[idx] >> size) != tmp >> size)
+            if ((buf[idx] >> size) != tmp >> size)
                 buf[idx] = (uint8_t)(buf[idx] + (1 << size));
-        } /* end if */
-    } /* end if */
-    else { /* bit sequence ends in the same byte as starts */
+        }
+    }
+    else {
+        /* The bit sequence ends in the same byte as starts */
+
         /* Example: a sequence like 11000100 and pos=3, size=3.  We substract 00001000
          * and get 10111100.  A bit is borrowed from 6th bit(buf[idx]>>6=00000010, tmp>>6=00000011,
          * not equal).  We need to put this bit back by increment 1000000.
          */
         tmp = buf[idx];
         buf[idx] = (uint8_t)(buf[idx] - (1 << pos));
-        if((buf[idx] >> (pos + size)) != tmp >> (pos + size)) {
+        if ((buf[idx] >> (pos + size)) != tmp >> (pos + size)) {
             buf[idx] = (uint8_t)(buf[idx] + (1 << (pos + size)));
             borrow = 1;
-        } /* end if */
-    } /* end else */
+        }
+    }
 
     FUNC_LEAVE_NOAPI(borrow ? TRUE : FALSE)
 } /* end H5T__bit_dec() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__bit_neg
- *
- * Purpose:	negate part of a bit sequence.  The bit
- *              field starts with bit position START and is SIZE bits long.
+ * Function:    H5T__bit_neg
  *
- * Return:	void
+ * Purpose:     Negate part of a bit sequence.  The bit field starts with
+ *              bit position START and is SIZE bits long.
  *
- * Programmer:	Raymond Lu
- *              March 19, 2004
+ * Return:      void
  *
  *-------------------------------------------------------------------------
  */
 void
 H5T__bit_neg(uint8_t *buf, size_t start, size_t size)
 {
-    size_t	idx = start / 8;
+    size_t      idx = start / 8;
     size_t      pos = start % 8;
     uint8_t     tmp[1];
 
@@ -697,17 +666,19 @@ H5T__bit_neg(uint8_t *buf, size_t start, size_t size)
             buf[idx] = (uint8_t)~(buf[idx]);
             idx++;
             size -= 8;
-        } /* end while */
+        }
 
         /* The last partial byte */
         if(size > 0) {
             /* Similar to the first byte case, where sequence ends in the same byte as starts */
             tmp[0] = (uint8_t)~buf[idx];
             H5T__bit_copy(&(buf[idx]), (size_t)0, tmp, (size_t)0, size);
-        } /* end if */
-    } /* end if */
-    else  /* bit sequence ends in the same byte as starts */
+        }
+    }
+    else  {
+        /* bit sequence ends in the same byte as starts */
         H5T__bit_copy(&(buf[idx]), pos, tmp, pos, size);
+    }
 
     FUNC_LEAVE_NOAPI_VOID
 } /* end H5T__bit_neg() */
diff --git a/src/H5Tcommit.c b/src/H5Tcommit.c
index 3ded7af..4e4a551 100644
--- a/src/H5Tcommit.c
+++ b/src/H5Tcommit.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -28,14 +26,16 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"        /* Metadata cache                       */
-#include "H5Eprivate.h"		/* Error handling			*/
-#include "H5FOprivate.h"	/* File objects				*/
-#include "H5Iprivate.h"		/* IDs					*/
-#include "H5Lprivate.h"		/* Links				*/
-#include "H5Pprivate.h"         /* Property lists                       */
-#include "H5Tpkg.h"		/* Datatypes				*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5ACprivate.h"        /* Metadata cache                           */
+#include "H5CXprivate.h"        /* API Contexts                             */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5FOprivate.h"        /* File objects                             */
+#include "H5Iprivate.h"         /* IDs                                      */
+#include "H5Lprivate.h"         /* Links                                    */
+#include "H5MMprivate.h"        /* Memory Management                        */
+#include "H5Pprivate.h"         /* Property lists                           */
+#include "H5Tpkg.h"             /* Datatypes                                */
 
 
 /****************/
@@ -56,7 +56,11 @@
 /********************/
 /* Local Prototypes */
 /********************/
-static H5T_t *H5T_open_oid(const H5G_loc_t *loc, hid_t dxpl_id);
+static herr_t H5T__commit_anon(H5F_t *file, H5T_t *type, hid_t tcpl_id);
+static hid_t H5T__get_create_plist(const H5T_t *type);
+static H5T_t *H5T__open_oid(const H5G_loc_t *loc);
+static herr_t H5T__flush(H5T_t *dt, hid_t type_id);
+static herr_t H5T__refresh(H5T_t *dt, hid_t type_id);
 
 
 /*********************/
@@ -99,7 +103,6 @@ H5Tcommit2(hid_t loc_id, const char *name, hid_t type_id, hid_t lcpl_id,
 {
     H5G_loc_t	loc;                    /* Location to create datatype */
     H5T_t	*type;                  /* Datatype for ID */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */ 
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -127,12 +130,12 @@ H5Tcommit2(hid_t loc_id, const char *name, hid_t type_id, hid_t lcpl_id,
         if(TRUE != H5P_isa_class(tcpl_id, H5P_DATATYPE_CREATE))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not datatype creation property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&tapl_id, H5P_CLS_TACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&tapl_id, H5P_CLS_TACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Commit the type */
-    if(H5T__commit_named(&loc, name, type, lcpl_id, tcpl_id, tapl_id, dxpl_id) < 0)
+    if(H5T__commit_named(&loc, name, type, lcpl_id, tcpl_id) < 0)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to commit datatype")
 
 done:
@@ -155,14 +158,14 @@ done:
  */
 herr_t
 H5T__commit_named(const H5G_loc_t *loc, const char *name, H5T_t *dt,
-    hid_t lcpl_id, hid_t tcpl_id, hid_t tapl_id, hid_t dxpl_id)
+    hid_t lcpl_id, hid_t tcpl_id)
 {
     H5O_obj_create_t ocrt_info;         /* Information for object creation */
     H5T_obj_create_t tcrt_info;         /* Information for named datatype creation */
     H5T_state_t old_state;              /* The state of the datatype before H5T__commit. */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
-    FUNC_ENTER_PACKAGE
+    FUNC_ENTER_PACKAGE_VOL
 
     /* Sanity checks */
     HDassert(loc);
@@ -170,8 +173,6 @@ H5T__commit_named(const H5G_loc_t *loc, const char *name, H5T_t *dt,
     HDassert(dt);
     HDassert(lcpl_id != H5P_DEFAULT);
     HDassert(tcpl_id != H5P_DEFAULT);
-    HDassert(tapl_id != H5P_DEFAULT);
-    HDassert(dxpl_id != H5P_DEFAULT);
 
     /* Record the type's state so that we can revert to it if linking fails */
     old_state = dt->shared->state;
@@ -186,7 +187,7 @@ H5T__commit_named(const H5G_loc_t *loc, const char *name, H5T_t *dt,
     ocrt_info.new_obj = NULL;
 
     /* Create the new named datatype and link it to its parent group */
-    if(H5L_link_object(loc, name, &ocrt_info, lcpl_id, tapl_id, dxpl_id) < 0)
+    if(H5L_link_object(loc, name, &ocrt_info, lcpl_id) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to create and link to named datatype")
     HDassert(ocrt_info.new_obj);
 
@@ -199,7 +200,7 @@ done:
             /* Remove the datatype from the list of opened objects in the file */
             if(H5FO_top_decr(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "can't decrement count for object")
-            if(H5FO_delete(dt->sh_loc.file, dxpl_id, dt->sh_loc.u.loc.oh_addr) < 0)
+            if(H5FO_delete(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) < 0)
                 HDONE_ERROR(H5E_DATASET, H5E_CANTRELEASE, FAIL, "can't remove dataset from list of open objects")
 
             /* Close the datatype object */
@@ -207,7 +208,7 @@ done:
                 HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, FAIL, "unable to release object header")
 
             /* Remove the datatype's object header from the file */
-            if(H5O_delete(dt->sh_loc.file, dxpl_id, dt->sh_loc.u.loc.oh_addr) < 0)
+            if(H5O_delete(dt->sh_loc.file, dt->sh_loc.u.loc.oh_addr) < 0)
                 HDONE_ERROR(H5E_DATATYPE, H5E_CANTDELETE, FAIL, "unable to delete object header")
 
             /* Mark datatype as being back in memory */
@@ -218,7 +219,7 @@ done:
 	} /* end if */
     } /* end if */
 
-    FUNC_LEAVE_NOAPI(ret_value)
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
 } /* end H5T__commit_named() */
 
 
@@ -246,7 +247,6 @@ H5Tcommit_anon(hid_t loc_id, hid_t type_id, hid_t tcpl_id, hid_t tapl_id)
 {
     H5G_loc_t	loc;                    /* Group location for location */
     H5T_t	*type = NULL;           /* Datatype created */
-    hid_t       dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl used by library */
     herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_API(FAIL)
@@ -265,30 +265,61 @@ H5Tcommit_anon(hid_t loc_id, hid_t type_id, hid_t tcpl_id, hid_t tapl_id)
         if(TRUE != H5P_isa_class(tcpl_id, H5P_DATATYPE_CREATE))
             HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not datatype creation property list")
 
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&tapl_id, H5P_CLS_TACC, &dxpl_id, loc_id, TRUE) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&tapl_id, H5P_CLS_TACC, loc_id, TRUE) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    /* Commit the type */
+    if(H5T__commit_anon(loc.oloc->file, type, tcpl_id) < 0)
+	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to commit datatype")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5Tcommit_anon() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5T__commit_anon
+ *
+ * Purpose:	Create an anonymous committed datatype.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *              Tuesday, December 12, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5T__commit_anon(H5F_t *file, H5T_t *type, hid_t tcpl_id)
+{
+    H5O_loc_t *oloc;                    /* Object location for datatype */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Sanity checks */
+    HDassert(file);
+    HDassert(type);
+    HDassert(tcpl_id != H5P_DEFAULT);
 
     /* Commit the type */
-    if(H5T__commit(loc.oloc->file, type, tcpl_id, dxpl_id) < 0)
+    if(H5T__commit(file, type, tcpl_id) < 0)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to commit datatype")
 
     /* Release the datatype's object header */
-    {
-        H5O_loc_t *oloc;         /* Object location for datatype */
 
-        /* Get the new committed datatype's object location */
-        if(NULL == (oloc = H5T_oloc(type)))
-            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get object location of committed datatype")
+    /* Get the new committed datatype's object location */
+    if(NULL == (oloc = H5T_oloc(type)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get object location of committed datatype")
 
-        /* Decrement refcount on committed datatype's object header in memory */
-        if(H5O_dec_rc_by_loc(oloc, dxpl_id) < 0)
-           HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
-    } /* end if */
+    /* Decrement refcount on committed datatype's object header in memory */
+    if(H5O_dec_rc_by_loc(oloc) < 0)
+       HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
 
 done:
-    FUNC_LEAVE_API(ret_value)
-} /* end H5Tcommit_anon() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5T__commit_anon() */
 
 
 /*-------------------------------------------------------------------------
@@ -305,7 +336,7 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5T__commit(H5F_t *file, H5T_t *type, hid_t tcpl_id, hid_t dxpl_id)
+H5T__commit(H5F_t *file, H5T_t *type, hid_t tcpl_id)
 {
     H5O_loc_t   temp_oloc;              /* Temporary object header location */
     H5G_name_t  temp_path;              /* Temporary path */
@@ -329,9 +360,9 @@ H5T__commit(H5F_t *file, H5T_t *type, hid_t tcpl_id, hid_t dxpl_id)
      * a named type should always succeed.
      */
     if(H5T_STATE_NAMED == type->shared->state || H5T_STATE_OPEN == type->shared->state)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "datatype is already committed")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "datatype is already committed")
     if(H5T_STATE_IMMUTABLE == type->shared->state)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "datatype is immutable")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "datatype is immutable")
 
     /* Check for a "sensible" datatype to store on disk */
     if(H5T_is_sensible(type) <= 0)
@@ -345,15 +376,14 @@ H5T__commit(H5F_t *file, H5T_t *type, hid_t tcpl_id, hid_t dxpl_id)
 
     /* Reset datatype location and path */
     if(H5O_loc_reset(&temp_oloc) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "unable to initialize location")
+        HGOTO_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "unable to initialize location")
     if(H5G_name_reset(&temp_path) < 0)
-	HGOTO_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "unable to initialize path")
+        HGOTO_ERROR(H5E_SYM, H5E_CANTRESET, FAIL, "unable to initialize path")
     loc_init = TRUE;
 
-    /* Set the latest format, if requested */
-    if(H5F_USE_LATEST_FLAGS(file, H5F_LATEST_DATATYPE))
-        if(H5T_set_latest_version(type) < 0)
-            HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set latest version of datatype")
+    /* Set the version for datatype */
+    if(H5T_set_version(file, type) < 0)
+        HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't set version of datatype")
 
     /* Calculate message size infomation, for creating object header */
     dtype_size = H5O_msg_size_f(file, tcpl_id, H5O_DTYPE_ID, type, (size_t)0);
@@ -363,16 +393,16 @@ H5T__commit(H5F_t *file, H5T_t *type, hid_t tcpl_id, hid_t dxpl_id)
      * Create the object header and open it for write access. Insert the data
      * type message and then give the object header a name.
      */
-    if(H5O_create(file, dxpl_id, dtype_size, (size_t)1, tcpl_id, &temp_oloc) < 0)
+    if(H5O_create(file, dtype_size, (size_t)1, tcpl_id, &temp_oloc) < 0)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to create datatype object header")
-    if(H5O_msg_create(&temp_oloc, H5O_DTYPE_ID, H5O_MSG_FLAG_CONSTANT | H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, type, dxpl_id) < 0)
+    if(H5O_msg_create(&temp_oloc, H5O_DTYPE_ID, H5O_MSG_FLAG_CONSTANT | H5O_MSG_FLAG_DONTSHARE, H5O_UPDATE_TIME, type) < 0)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to update type header message")
 
     /* Copy the new object header's location into the datatype, taking ownership of it */
     if(H5O_loc_copy(&(type->oloc), &temp_oloc, H5_COPY_SHALLOW) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy datatype location")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy datatype location")
     if(H5G_name_copy(&(type->path), &temp_path, H5_COPY_SHALLOW) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy datatype location")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to copy datatype location")
     loc_init = FALSE;
 
     /* Set the shared info fields */
@@ -399,14 +429,14 @@ done:
             H5G_name_free(&temp_path);
         } /* end if */
         if((type->shared->state == H5T_STATE_TRANSIENT || type->shared->state == H5T_STATE_RDONLY) && (type->sh_loc.type == H5O_SHARE_TYPE_COMMITTED)) {
-            if(H5O_dec_rc_by_loc(&(type->oloc), dxpl_id) < 0)
+            if(H5O_dec_rc_by_loc(&(type->oloc)) < 0)
                 HDONE_ERROR(H5E_DATATYPE, H5E_CANTDEC, FAIL, "unable to decrement refcount on newly created object")
-	    if(H5O_close(&(type->oloc), NULL) < 0)
+            if(H5O_close(&(type->oloc), NULL) < 0)
                 HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, FAIL, "unable to release object header")
-            if(H5O_delete(file, dxpl_id, type->sh_loc.u.loc.oh_addr) < 0)
+            if(H5O_delete(file, type->sh_loc.u.loc.oh_addr) < 0)
                 HDONE_ERROR(H5E_DATATYPE, H5E_CANTDELETE, FAIL, "unable to delete object header")
-	    type->sh_loc.type = H5O_SHARE_TYPE_UNSHARED;
-	} /* end if */
+            type->sh_loc.type = H5O_SHARE_TYPE_UNSHARED;
+        } /* end if */
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -487,7 +517,7 @@ H5T_committed(const H5T_t *type)
  *-------------------------------------------------------------------------
  */
 int
-H5T_link(const H5T_t *type, int adjust, hid_t dxpl_id)
+H5T_link(const H5T_t *type, int adjust)
 {
     int ret_value = -1;         /* Return value */
 
@@ -497,7 +527,7 @@ H5T_link(const H5T_t *type, int adjust, hid_t dxpl_id)
     HDassert(type->sh_loc.type == H5O_SHARE_TYPE_COMMITTED);
 
     /* Adjust the link count on the named datatype */
-    if((ret_value = H5O_link(&type->oloc, adjust, dxpl_id)) < 0)
+    if((ret_value = H5O_link(&type->oloc, adjust)) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_LINKCOUNT, FAIL, "unable to adjust named datatype link count")
 
 done:
@@ -522,65 +552,36 @@ done:
 hid_t
 H5Topen2(hid_t loc_id, const char *name, hid_t tapl_id)
 {
-    H5T_t      *type = NULL;           /* Datatype opened in file */
+    H5T_t      *type = NULL;            /* Datatype opened in file */
     H5G_loc_t	 loc;                   /* Group location of object to open */
-    H5G_name_t   path;            	/* Datatype group hier. path */
-    H5O_loc_t    oloc;            	/* Datatype object location */
-    H5O_type_t   obj_type;              /* Type of object at location */
-    H5G_loc_t    type_loc;              /* Group object for datatype */
-    hbool_t      obj_found = FALSE;     /* Object at 'name' found */
-    hid_t        dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl to use to open datatype */
-    hid_t        ret_value = FAIL;      /* Return value */
+    hid_t        ret_value = H5I_INVALID_HID;      /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE3("i", "i*si", loc_id, name, tapl_id);
 
     /* Check args */
     if(H5G_loc(loc_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
     if(!name || !*name)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
-
-    /* Verify access property list and get correct dxpl */
-    if(H5P_verify_apl_and_dxpl(&tapl_id, H5P_CLS_TACC, &dxpl_id, loc_id, FALSE) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access and transfer property lists")
-
-    /* Set up datatype location to fill in */
-    type_loc.oloc = &oloc;
-    type_loc.path = &path;
-    H5G_loc_reset(&type_loc);
-
-    /*
-     * Find the named datatype object header and read the datatype message
-     * from it.
-     */
-    if(H5G_loc_find(&loc, name, &type_loc/*out*/, tapl_id, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "not found")
-    obj_found = TRUE;
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "no name")
 
-    /* Check that the object found is the correct type */
-    if(H5O_obj_type(&oloc, &obj_type, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't get object type")
-    if(obj_type != H5O_TYPE_NAMED_DATATYPE)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "not a named datatype")
+    /* Verify access property list and set up collective metadata if appropriate */
+    if(H5CX_set_apl(&tapl_id, H5P_CLS_TACC, loc_id, FALSE) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
 
     /* Open it */
-    if(NULL == (type = H5T_open(&type_loc, dxpl_id)))
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, FAIL, "unable to open named datatype")
+    if(NULL == (type = H5T__open_name(&loc, name)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open named datatype")
 
     /* Register the type and return the ID */
     if((ret_value = H5I_register(H5I_DATATYPE, type, TRUE)) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register named datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register named datatype")
 
 done:
-    if(ret_value < 0) {
+    /* Cleanup on error */
+    if(ret_value < 0)
         if(type != NULL)
-            H5T_close(type);
-        else {
-            if(obj_found && H5F_addr_defined(type_loc.oloc->addr))
-                H5G_loc_free(&type_loc);
-        } /* end else */
-    } /* end if */
+            (void)H5T_close(type);
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Topen2() */
@@ -591,6 +592,9 @@ done:
  *
  * Purpose:	Returns a copy of the datatype creation property list.
  *
+ * Note:	There are no datatype creation properties currently, just
+ * 		object creation ones.
+ *
  * Return:	Success:	ID for a copy of the datatype creation
  *				property list.  The property list ID should be
  *				released by calling H5Pclose().
@@ -605,11 +609,9 @@ done:
 hid_t
 H5Tget_create_plist(hid_t dtype_id)
 {
-    H5T_t	        *type;          /* Datatype object for ID */
-    H5P_genplist_t      *tcpl_plist;    /* Existing datatype creation propertty list */
-    hid_t		new_tcpl_id = FAIL;     /* New datatype creation property list */
-    herr_t              status;         /* Generic status value */
-    hid_t		ret_value;      /* Return value */
+    H5T_t *type;                /* Datatype object for ID */
+    herr_t status;              /* Generic status value */
+    hid_t ret_value = FAIL;	/* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("i", "i", dtype_id);
@@ -618,28 +620,146 @@ H5Tget_create_plist(hid_t dtype_id)
     if(NULL == (type = (H5T_t *)H5I_object_verify(dtype_id, H5I_DATATYPE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
-    /* Copy the default datatype creation property list */
-    if(NULL == (tcpl_plist = (H5P_genplist_t *)H5I_object(H5P_LST_DATATYPE_CREATE_ID_g)))
-         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get default creation property list")
-    if((new_tcpl_id = H5P_copy_plist(tcpl_plist, TRUE)) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to copy the creation property list")
-
     /* Check if the datatype is committed */
     if((status = H5T_committed(type)) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't check whether datatype is committed")
 
     /* Retrieve further information, if the datatype is committed */
-    if(status > 0) {
-        H5P_genplist_t  *new_plist;     /* New datatype creation property list */
+    if(status > 0)
+        /* Retrieve datatype creation properties */
+        if((ret_value = H5T__get_create_plist(type)) < 0)
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't get object creation info")
 
-        /* Get property list object for new TCPL */
-        if(NULL == (new_plist = (H5P_genplist_t *)H5I_object(new_tcpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get property list")
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* end H5Tget_create_plist() */
 
-        /* Retrieve any object creation properties */
-        if(H5O_get_create_plist(&type->oloc, H5AC_ind_read_dxpl_id, new_plist) < 0)
-            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't get object creation info")
-    } /* end if */
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Tflush
+ *
+ * Purpose:     Flushes all buffers associated with a named datatype to disk.
+ *
+ * Return:      Non-negative on success, negative on failure
+ *
+ * Programmer:  Mike McGreevy
+ *              May 19, 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Tflush(hid_t type_id)
+{
+    H5T_t *dt;                          /* Datatype for this operation */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE1("e", "i", type_id);
+
+    /* Check args */
+    if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+    if(!H5T_is_named(dt))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a committed datatype")
+
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(type_id) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    /* Flush metadata for named datatype */
+    if(H5T__flush(dt, type_id) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTFLUSH, FAIL, "unable to flush datatype")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* H5Tflush */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5Trefresh
+ *
+ * Purpose:     Refreshes all buffers associated with a named datatype.
+ *
+ * Return:      Non-negative on success, negative on failure
+ *
+ * Programmer:  Mike McGreevy
+ *              July 21, 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5Trefresh(hid_t type_id)
+{
+    H5T_t *dt;                          /* Datatype for this operation */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_API(FAIL)
+    H5TRACE1("e", "i", type_id);
+
+    /* Check args */
+    if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+    if(!H5T_is_named(dt))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a committed datatype")
+
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(type_id) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
+
+    /* Call private function to refresh datatype object */
+    if((H5T__refresh(dt, type_id)) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTLOAD, FAIL, "unable to refresh datatype")
+
+done:
+    FUNC_LEAVE_API(ret_value)
+} /* H5Trefresh */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5T__get_create_plist
+ *
+ * Purpose:	Returns a copy of the datatype creation property list.
+ *
+ * Note:	There are no datatype creation properties currently, just
+ * 		object creation ones.
+ *
+ * Return:	Success:	ID for a copy of the datatype creation
+ *				property list.  The property list ID should be
+ *				released by calling H5Pclose().
+ *
+ *		Failure:	FAIL
+ *
+ * Programmer:	Quincey Koziol
+ *		Wednesday, December 13, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static hid_t
+H5T__get_create_plist(const H5T_t *type)
+{
+    H5P_genplist_t      *tcpl_plist;    /* Existing datatype creation propertty list */
+    H5P_genplist_t      *new_plist;     /* New datatype creation property list */
+    hid_t		new_tcpl_id = FAIL;     /* New datatype creation property list */
+    hid_t		ret_value = FAIL;       /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Sanity check */
+    HDassert(type);
+
+    /* Copy the default datatype creation property list */
+    if(NULL == (tcpl_plist = (H5P_genplist_t *)H5I_object(H5P_LST_DATATYPE_CREATE_ID_g)))
+         HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "can't get default creation property list")
+    if((new_tcpl_id = H5P_copy_plist(tcpl_plist, TRUE)) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to copy the creation property list")
+
+    /* Get property list object for new TCPL */
+    if(NULL == (new_plist = (H5P_genplist_t *)H5I_object(new_tcpl_id)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "can't get property list")
+
+    /* Retrieve any object creation properties */
+    if(H5O_get_create_plist(&type->oloc, new_plist) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't get object creation info")
 
     /* Set the return value */
     ret_value = new_tcpl_id;
@@ -650,8 +770,74 @@ done:
             if(H5I_dec_app_ref(new_tcpl_id) < 0)
                 HDONE_ERROR(H5E_DATATYPE, H5E_CANTDEC, FAIL, "unable to close temporary object")
 
-    FUNC_LEAVE_API(ret_value)
-} /* end H5Tget_create_plist() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5T__get_create_plist() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:	H5T__open_name
+ *
+ * Purpose:	Open a named datatype.
+ *
+ * Return:	Success:	Ptr to a new datatype.
+ *		Failure:	NULL
+ *
+ * Programmer:	Quincey Koziol
+ *              Wednesday, December 13, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+H5T_t *
+H5T__open_name(const H5G_loc_t *loc, const char *name)
+{
+    H5T_t       *dt = NULL;             /* Datatype opened in file */
+    H5G_name_t   path;            	/* Datatype group hier. path */
+    H5O_loc_t    oloc;            	/* Datatype object location */
+    H5G_loc_t    type_loc;              /* Group object for datatype */
+    H5O_type_t   obj_type;              /* Type of object at location */
+    hbool_t      obj_found = FALSE;     /* Object at 'name' found */
+    H5T_t        *ret_value = NULL;     /* Return value */
+
+    FUNC_ENTER_PACKAGE_VOL
+
+    /* Sanity check */
+    HDassert(loc);
+    HDassert(name);
+
+    /* Set up datatype location to fill in */
+    type_loc.oloc = &oloc;
+    type_loc.path = &path;
+    H5G_loc_reset(&type_loc);
+
+    /*
+     * Find the named datatype object header and read the datatype message
+     * from it.
+     */
+    if(H5G_loc_find(loc, name, &type_loc/*out*/) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, NULL, "not found")
+    obj_found = TRUE;
+
+    /* Check that the object found is the correct type */
+    if(H5O_obj_type(&oloc, &obj_type) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, NULL, "can't get object type")
+    if(obj_type != H5O_TYPE_NAMED_DATATYPE)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, NULL, "not a named datatype")
+
+    /* Open it */
+    if(NULL == (dt = H5T_open(&type_loc)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, NULL, "unable to open named datatype")
+
+    ret_value = dt;
+
+done:
+    /* Error cleanup */
+    if(NULL == ret_value)
+        if(obj_found && H5F_addr_defined(type_loc.oloc->addr))
+            if(H5G_loc_free(&type_loc) < 0)
+                HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, NULL, "can't free location")
+
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5T__open_name() */
 
 
 /*-------------------------------------------------------------------------
@@ -669,7 +855,7 @@ done:
  *-------------------------------------------------------------------------
  */
 H5T_t *
-H5T_open(const H5G_loc_t *loc, hid_t dxpl_id)
+H5T_open(const H5G_loc_t *loc)
 {
     H5T_shared_t   *shared_fo = NULL;
     H5T_t          *dt = NULL;
@@ -685,7 +871,7 @@ H5T_open(const H5G_loc_t *loc, hid_t dxpl_id)
         H5E_clear_stack(NULL);
 
         /* Open the datatype object */
-        if(NULL == (dt = H5T_open_oid(loc, dxpl_id)))
+        if(NULL == (dt = H5T__open_oid(loc)))
             HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, NULL, "not found")
 
         /* Add the datatype to the list of opened objects in the file */
@@ -772,7 +958,7 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_open_oid
+ * Function:	H5T__open_oid
  *
  * Purpose:	Open a named datatype.
  *
@@ -786,12 +972,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5T_t *
-H5T_open_oid(const H5G_loc_t *loc, hid_t dxpl_id)
+H5T__open_oid(const H5G_loc_t *loc)
 {
     H5T_t *dt = NULL;          /* Datatype from the file */
     H5T_t *ret_value = NULL;   /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC_TAG(loc->oloc->addr)
 
     HDassert(loc);
 
@@ -800,7 +986,7 @@ H5T_open_oid(const H5G_loc_t *loc, hid_t dxpl_id)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, NULL, "unable to open named datatype")
 
     /* Deserialize the datatype message into a datatype in memory */
-    if(NULL == (dt = (H5T_t *)H5O_msg_read(loc->oloc, H5O_DTYPE_ID, NULL, dxpl_id)))
+    if(NULL == (dt = (H5T_t *)H5O_msg_read(loc->oloc, H5O_DTYPE_ID, NULL)))
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to load type message from object header")
 
     /* Mark the type as named and open */
@@ -825,8 +1011,8 @@ done:
         if(dt == NULL)
             H5O_close(loc->oloc, NULL);
 
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5T_open_oid() */
+    FUNC_LEAVE_NOAPI_TAG(ret_value)
+} /* end H5T__open_oid() */
 
 
 /*-------------------------------------------------------------------------
@@ -854,3 +1040,73 @@ H5T_update_shared(H5T_t *dt)
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5T_update_shared() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5T__flush
+ *
+ * Purpose:     Internal routine to flushes a named datatype to disk.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:      Success:    Non-negative
+ *              Failure:    Negative
+ *
+ * Programmer:  Quincey Koziol
+ *              December 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5T__flush(H5T_t *dt, hid_t type_id)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Sanity check */
+    HDassert(dt);
+
+    /* To flush metadata and invoke flush callback if there is */
+    if(H5O_flush_common(&dt->oloc, type_id) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTFLUSH, FAIL, "unable to flush datatype and object flush callback")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5T__flush */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5T__refresh
+ *
+ * Purpose:     Internal routine to refresh a named datatype.
+ *
+ * Note:        This routine is needed so that there's a non-API routine
+ *              that can set up VOL / SWMR info (which need a DXPL).
+ *
+ * Return:      Success:    Non-negative
+ *              Failure:    Negative
+ *
+ * Programmer:  Quincey Koziol
+ *              December 18, 2017
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+H5T__refresh(H5T_t *dt, hid_t type_id)
+{
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_STATIC_VOL
+
+    /* Sanity check */
+    HDassert(dt);
+
+    /* Call private function to refresh datatype object */
+    if((H5O_refresh_metadata(type_id, dt->oloc)) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTLOAD, FAIL, "unable to refresh datatype")
+
+done:
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* H5T__refresh */
+
diff --git a/src/H5Tcompound.c b/src/H5Tcompound.c
index 1342770..feece57 100644
--- a/src/H5Tcompound.c
+++ b/src/H5Tcompound.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -29,6 +27,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/*generic functions			  */
+#include "H5CXprivate.h"        /*API Contexts                            */
 #include "H5Eprivate.h"		/*error handling			  */
 #include "H5Iprivate.h"		/*ID functions		   		  */
 #include "H5MMprivate.h"	/*memory management			  */
@@ -217,23 +216,27 @@ H5Tget_member_type(hid_t type_id, unsigned membno)
     H5T_t	*memb_dt = NULL;        /* Member datatype */
     hid_t	ret_value;              /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE2("i", "iIu", type_id, membno);
 
     /* Check args */
     if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)) || H5T_COMPOUND != dt->shared->type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a compound datatype")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a compound datatype")
     if(membno >= dt->shared->u.compnd.nmembs)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid member number")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "invalid member number")
+
+    /* Retrieve the datatype for the member */
     if(NULL == (memb_dt = H5T_get_member_type(dt, membno, H5T_COPY_REOPEN)))
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to retrieve member type")
+	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5I_INVALID_HID, "unable to retrieve member type")
+
+    /* Get an ID for the datatype */
     if((ret_value = H5I_register(H5I_DATATYPE, memb_dt, TRUE)) < 0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable register datatype atom")
+	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable register datatype atom")
 
 done:
     if(ret_value < 0)
         if(memb_dt && H5T_close(memb_dt) < 0)
-            HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, FAIL, "can't close datatype")
+            HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, H5I_INVALID_HID, "can't close datatype")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Tget_member_type() */
diff --git a/src/H5Tconv.c b/src/H5Tconv.c
index 23ccd98..f3af9e1 100644
--- a/src/H5Tconv.c
+++ b/src/H5Tconv.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -28,6 +26,7 @@
 /* Headers */
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"		/* Datasets				*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FLprivate.h"	/* Free Lists                           */
@@ -679,7 +678,6 @@
     hbool_t	s_mv, d_mv;		/*move data to align it?	*/    \
     ssize_t	s_stride, d_stride;	/*src and dst strides		*/    \
     size_t      safe;                   /*how many elements are safe to process in each pass */ \
-    H5P_genplist_t      *plist;         /*Property list pointer         */    \
     H5T_conv_cb_t       cb_struct;      /*conversion callback structure */    \
                                                                               \
     switch (cdata->command) {						      \
@@ -724,13 +722,9 @@
 	CI_INC_SRC(s_mv)						      \
 	CI_INC_DST(d_mv)						      \
 	                                                                      \
-        /* Get the plist structure */                                         \
-        if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))    \
-            HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find property list for ID") \
-                                                                              \
         /* Get conversion exception callback property */                      \
-        if(H5P_get(plist, H5D_XFER_CONV_CB_NAME, &cb_struct) < 0)             \
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get conversion exception callback") \
+        if(H5CX_get_dt_conv_cb(&cb_struct) < 0)                               \
+            HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get conversion exception callback") \
                                                                               \
         /* Get source and destination datatypes */			      \
         if(NULL == (st = (H5T_t *)H5I_object(src_id)) || NULL == (dt = (H5T_t *)H5I_object(dst_id))) \
@@ -1041,9 +1035,9 @@ H5FL_BLK_DEFINE_STATIC(array_seq);
  */
 herr_t
 H5T__conv_noop(hid_t H5_ATTR_UNUSED src_id, hid_t H5_ATTR_UNUSED dst_id, H5T_cdata_t *cdata,
-	      size_t H5_ATTR_UNUSED nelmts, size_t H5_ATTR_UNUSED buf_stride,
-              size_t H5_ATTR_UNUSED bkg_stride, void H5_ATTR_UNUSED *buf,
-	      void H5_ATTR_UNUSED *background, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t H5_ATTR_UNUSED nelmts, size_t H5_ATTR_UNUSED buf_stride,
+    size_t H5_ATTR_UNUSED bkg_stride, void H5_ATTR_UNUSED *buf,
+    void H5_ATTR_UNUSED *background)
 {
     herr_t      ret_value = SUCCEED;       /* Return value */
 
@@ -1084,15 +1078,13 @@ done:
  * Programmer:	Robb Matzke
  *		Friday, January 25, 2002
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_order_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                    size_t nelmts, size_t buf_stride,
                    size_t H5_ATTR_UNUSED bkg_stride, void *_buf,
-                   void H5_ATTR_UNUSED *background, hid_t H5_ATTR_UNUSED dxpl_id)
+                   void H5_ATTR_UNUSED *background)
 {
     uint8_t	*buf = (uint8_t*)_buf;
     H5T_t	*src = NULL;
@@ -1498,20 +1490,12 @@ done:
  * Programmer:	Robb Matzke
  *		Tuesday, January 13, 1998
  *
- * Modifications:
- *		Robb Matzke, 1999-06-16
- *		Added the `stride' argument. If its value is non-zero then we
- *		stride through memory converting one value at each location;
- *		otherwise we assume that the values should be packed.
- *
- * 		Robb Matzke, 1999-06-16
- *		Added support for bitfields.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_order(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
 	       size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *_buf,
-               void H5_ATTR_UNUSED *background, hid_t H5_ATTR_UNUSED dxpl_id)
+               void H5_ATTR_UNUSED *background)
 {
     uint8_t	*buf = (uint8_t*)_buf;
     H5T_t	*src = NULL;
@@ -1605,18 +1589,12 @@ done:
  * Programmer:	Robb Matzke
  *		Thursday, May 20, 1999
  *
- * Modifications:
- *		Robb Matzke, 1999-06-16
- *		Added support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_b_b(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
 	     size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *_buf,
-             void H5_ATTR_UNUSED *background, hid_t dxpl_id)
+             void H5_ATTR_UNUSED *background)
 {
     uint8_t	*buf = (uint8_t*)_buf;
     H5T_t	*src = NULL, *dst = NULL;	/*source and dest datatypes	*/
@@ -1629,7 +1607,6 @@ H5T__conv_b_b(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
     size_t	msb_pad_offset;		/*offset for dest MSB padding	*/
     size_t	i;
     uint8_t     *src_rev=NULL;          /*order-reversed source buffer  */
-    H5P_genplist_t      *plist;         /*property list pointer         */
     H5T_conv_cb_t       cb_struct = {NULL, NULL};      /*conversion callback structure */
     H5T_conv_ret_t      except_ret;     /*return of callback function   */
     hbool_t             reverse;        /*if reverse the order of destination        */
@@ -1685,13 +1662,9 @@ H5T__conv_b_b(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 direction = -1;
             }
 
-            /* Get the plist structure */
-            if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
-                HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find property list for ID")
-
             /* Get conversion exception callback property */
-            if(H5P_get(plist, H5D_XFER_CONV_CB_NAME, &cb_struct) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
+            if(H5CX_get_dt_conv_cb(&cb_struct) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
 
             /* Allocate space for order-reversed source buffer */
             src_rev = (uint8_t *)H5MM_calloc(src->shared->size);
@@ -1859,8 +1832,6 @@ done:
  * Programmer:	Neil Fortner
  *		Wednesday, October 1, 2008
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static H5T_conv_struct_t *
@@ -1910,16 +1881,9 @@ H5T_conv_struct_free(H5T_conv_struct_t *priv)
  *		source member doesn't have a corresponding destination member
  *		then the src2dst[i]=-1.
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		Monday, January 26, 1998
- *
- * Modifications:
- *              Raymond Lu, 3 May 2007
- *              Added the detection for a special optimization case when the
- *              source and destination members are a subset of each other, and
- *              the order is the same, and no conversion is needed.  For example:
+ *              Special optimization case when the source and destination
+ *              members are a subset of each other, and the order is the same,
+ *              and no conversion is needed.  For example:
  *                  struct source {            struct destination {
  *                      TYPE1 A;      -->          TYPE1 A;
  *                      TYPE2 B;      -->          TYPE2 B;
@@ -1938,10 +1902,15 @@ H5T_conv_struct_free(H5T_conv_struct_t *priv)
  *              The optimization is simply moving data to the appropriate
  *              places in the buffer.
  *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Monday, January 26, 1998
+ *
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_conv_struct_init(H5T_t *src, H5T_t *dst, H5T_cdata_t *cdata, hid_t dxpl_id)
+H5T_conv_struct_init(H5T_t *src, H5T_t *dst, H5T_cdata_t *cdata)
 {
     H5T_conv_struct_t	*priv = (H5T_conv_struct_t*)(cdata->priv);
     int		        *src2dst = NULL;
@@ -2026,7 +1995,7 @@ H5T_conv_struct_init(H5T_t *src, H5T_t *dst, H5T_cdata_t *cdata, hid_t dxpl_id)
 
     for(i = 0; i < src_nmembs; i++) {
         if(src2dst[i] >= 0) {
-            H5T_path_t *tpath = H5T_path_find(src->shared->u.compnd.memb[i].type, dst->shared->u.compnd.memb[src2dst[i]].type, NULL, NULL, dxpl_id, FALSE);
+            H5T_path_t *tpath = H5T_path_find(src->shared->u.compnd.memb[i].type, dst->shared->u.compnd.memb[src2dst[i]].type);
 
             if(NULL == (priv->memb_path[i] = tpath)) {
                 cdata->priv = H5T_conv_struct_free(priv);
@@ -2153,7 +2122,7 @@ H5T__conv_struct_subset(const H5T_cdata_t *cdata)
  */
 herr_t
 H5T__conv_struct(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-    size_t buf_stride, size_t bkg_stride, void *_buf, void *_bkg, hid_t dxpl_id)
+    size_t buf_stride, size_t bkg_stride, void *_buf, void *_bkg)
 {
     uint8_t	*buf = (uint8_t *)_buf;	/*cast for pointer arithmetic	*/
     uint8_t	*bkg = (uint8_t *)_bkg;	/*background pointer arithmetic	*/
@@ -2189,7 +2158,7 @@ H5T__conv_struct(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             if(H5T_COMPOUND != dst->shared->type) 
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "not a H5T_COMPOUND datatype")
 
-            if(H5T_conv_struct_init(src, dst, cdata, dxpl_id) < 0)
+            if(H5T_conv_struct_init(src, dst, cdata) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize conversion data")
             break;
 
@@ -2209,7 +2178,7 @@ H5T__conv_struct(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             HDassert(priv);
             HDassert(bkg && cdata->need_bkg);
 
-            if(cdata->recalc && H5T_conv_struct_init(src, dst, cdata, dxpl_id) < 0)
+            if(cdata->recalc && H5T_conv_struct_init(src, dst, cdata) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize conversion data")
 
             /*
@@ -2263,8 +2232,7 @@ H5T__conv_struct(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         if(H5T_convert(priv->memb_path[u], priv->src_memb_id[u],
                                 priv->dst_memb_id[src2dst[u]],
                                 (size_t)1, (size_t)0, (size_t)0, /*no striding (packed array)*/
-                                xbuf + src_memb->offset, xbkg + dst_memb->offset,
-                                dxpl_id) < 0)
+                                xbuf + src_memb->offset, xbkg + dst_memb->offset) < 0)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert compound datatype member")
                         HDmemmove(xbuf + offset, xbuf + src_memb->offset, dst_memb->size);
                         offset += dst_memb->size;
@@ -2295,8 +2263,7 @@ H5T__conv_struct(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         if(H5T_convert(priv->memb_path[i],
                                     priv->src_memb_id[i], priv->dst_memb_id[src2dst[i]],
                                     (size_t)1, (size_t)0, (size_t)0, /*no striding (packed array)*/
-                                    xbuf + offset, xbkg + dst_memb->offset,
-                                    dxpl_id) < 0)
+                                    xbuf + offset, xbkg + dst_memb->offset) < 0)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert compound datatype member")
                     } /* end if */
                     else
@@ -2360,37 +2327,7 @@ done:
  *
  *		Copy BKG to BUF for all elements
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *		Thursday, January 22, 1998
- *
- * Modifications:
- *		Robb Matzke, 1999-06-16
- *              Added support for non-zero strides. If BUF_STRIDE is
- *              non-zero then convert one value at each memory location
- *              advancing BUF_STRIDE bytes each time; otherwise assume both
- *              source and destination values are packed.
- *
- * 		Robb Matzke, 1999-06-16
- *		If the source and destination data structs are the same size
- *		then we can convert on a field-by-field basis instead of an
- *		element by element basis. In other words, for all struct
- *		elements being converted by this function call, first convert
- *		all of the field1's, then all field2's, etc. This can
- *		drastically reduce the number of calls to H5T_convert() and
- *		thereby eliminate most of the conversion constant overhead.
- *
- *              Robb Matzke, 2000-05-17
- *              Added the BKG_STRIDE argument to fix a design bug. If
- *              BUF_STRIDE and BKG_STRIDE are both non-zero then each
- *              data element converted will be placed temporarily at a
- *              multiple of BKG_STRIDE in the BKG buffer; otherwise the
- *              BKG buffer is assumed to be a packed array of destination
- *              datatype.
- *
- *              Raymond Lu, 3 May 2007
- *              Optimize a special case when the source and destination members
+ *              Special case when the source and destination members
  *              are a subset of each other, and the order is the same, and no
  *              conversion is needed.  For example:
  *                  struct source {            struct destination {
@@ -2403,12 +2340,16 @@ done:
  *              The optimization is simply moving data to the appropriate
  *              places in the buffer.
  *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Robb Matzke
+ *		Thursday, January 22, 1998
+ *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_struct_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-    size_t nelmts, size_t buf_stride, size_t bkg_stride, void *_buf,
-    void *_bkg, hid_t dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t bkg_stride, void *_buf, void *_bkg)
 {
     uint8_t	*buf = (uint8_t *)_buf;	/*cast for pointer arithmetic	*/
     uint8_t	*bkg = (uint8_t *)_bkg;	/*background pointer arithmetic	*/
@@ -2446,7 +2387,7 @@ H5T__conv_struct_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "not a H5T_COMPOUND datatype")
 
             /* Initialize data which is relatively constant */
-            if(H5T_conv_struct_init(src, dst, cdata, dxpl_id) < 0)
+            if(H5T_conv_struct_init(src, dst, cdata) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize conversion data")
             priv = (H5T_conv_struct_t *)(cdata->priv);
             src2dst = priv->src2dst;
@@ -2502,7 +2443,7 @@ H5T__conv_struct_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                 HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
             /* Update cached data if necessary */
-            if(cdata->recalc && H5T_conv_struct_init(src, dst, cdata, dxpl_id)<0)
+            if(cdata->recalc && H5T_conv_struct_init(src, dst, cdata) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to initialize conversion data")
             priv = (H5T_conv_struct_t *)(cdata->priv);
             HDassert(priv);
@@ -2567,7 +2508,7 @@ H5T__conv_struct_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                         xbkg = bkg + dst_memb->offset;
                         if(H5T_convert(priv->memb_path[u], priv->src_memb_id[u],
                                 priv->dst_memb_id[src2dst[u]], nelmts,
-                                buf_stride, bkg_stride, xbuf, xbkg, dxpl_id) < 0)
+                                buf_stride, bkg_stride, xbuf, xbkg) < 0)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert compound datatype member")
                         for(elmtno = 0; elmtno < nelmts; elmtno++) {
                             HDmemmove(xbkg, xbuf, dst_memb->size);
@@ -2603,7 +2544,7 @@ H5T__conv_struct_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                         xbkg = bkg + dst_memb->offset;
                         if(H5T_convert(priv->memb_path[i], priv->src_memb_id[i],
                                 priv->dst_memb_id[src2dst[i]], nelmts,
-                                buf_stride, bkg_stride, xbuf, xbkg, dxpl_id) < 0)
+                                buf_stride, bkg_stride, xbuf, xbkg) < 0)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to convert compound datatype member")
                         for(elmtno = 0; elmtno < nelmts; elmtno++) {
                             HDmemmove(xbkg, xbuf, dst_memb->size);
@@ -2647,8 +2588,6 @@ done:
  * Programmer:	Robb Matzke
  *              Monday, January  4, 1999
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -2794,8 +2733,8 @@ done:
  */
 herr_t
 H5T__conv_enum(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-	      size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *_buf,
-              void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *_buf,
+    void H5_ATTR_UNUSED *bkg)
 {
     uint8_t	*buf = (uint8_t*)_buf;	/*cast for pointer arithmetic	*/
     H5T_t	*src = NULL, *dst = NULL;	/*src and dst datatypes	*/
@@ -2803,7 +2742,6 @@ H5T__conv_enum(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
     ssize_t	src_delta, dst_delta;	/*conversion strides		*/
     int	n;			/*src value cast as native int	*/
     H5T_enum_struct_t *priv = (H5T_enum_struct_t*)(cdata->priv);
-    H5P_genplist_t      *plist;         /*property list pointer         */
     H5T_conv_cb_t       cb_struct;      /*conversion callback structure */
     H5T_conv_ret_t      except_ret;     /*return of callback function   */
     size_t	i;			/*counters			*/
@@ -2881,13 +2819,9 @@ H5T__conv_enum(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 d = buf + (nelmts - 1) * dst->shared->size;
             }
 
-            /* Get the plist structure */
-            if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
-                HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find property list for ID")
-
             /* Get conversion exception callback property */
-            if(H5P_get(plist, H5D_XFER_CONV_CB_NAME, &cb_struct) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
+            if(H5CX_get_dt_conv_cb(&cb_struct) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
 
             for(i = 0; i < nelmts; i++, s += src_delta, d += dst_delta) {
                 if(priv->length) {
@@ -2992,7 +2926,7 @@ done:
 herr_t
 H5T__conv_enum_numeric(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
 	      size_t H5_ATTR_UNUSED buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *_buf,
-              void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+              void H5_ATTR_UNUSED *bkg)
 {
     H5T_t	*src, *dst;		/*src and dst datatypes	*/
     H5T_t	*src_parent;		/*parent type for src           */
@@ -3027,14 +2961,14 @@ H5T__conv_enum_numeric(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t ne
 
             src_parent = src->shared->parent;
 
-            if(NULL == (tpath = H5T_path_find(src_parent, dst, NULL, NULL, dxpl_id, FALSE))) {
+            if(NULL == (tpath = H5T_path_find(src_parent, dst))) {
 	        HGOTO_ERROR(H5E_DATASET, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest datatype")
             } else if(!H5T_path_noop(tpath)) {
                 if((src_parent_id = H5I_register(H5I_DATATYPE, H5T_copy(src_parent, H5T_COPY_ALL), FALSE)) < 0) 
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTREGISTER, FAIL, "unable to register types for conversion")
 
                 /* Convert the data */
-                if(H5T_convert(tpath, src_parent_id, dst_id, nelmts, buf_stride, bkg_stride, _buf, bkg, dxpl_id) < 0)
+                if(H5T_convert(tpath, src_parent_id, dst_id, nelmts, buf_stride, bkg_stride, _buf, bkg) < 0)
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
             }
             break;
@@ -3075,30 +3009,13 @@ done:
  * Programmer:	Quincey Koziol
  *		Wednesday, May 26, 1999
  *
- * Modifications:
- *
- *		Quincey Koziol, 2 July, 1999
- *		Enabled support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
- *
- *		Raymond Lu, 26 June, 2002
- *		Background buffer is used for freeing heap objects storing
- * 		old data.  At this moment, it only frees the first level of
- *		VL datatype.  It doesn't handle nested VL datatypes.
- *
- *              Raymond Lu, 8 November 2011
- *              I put a condition check to prevent the conversion of VL strings
- *              between ASCII and UTF8.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-    size_t buf_stride, size_t bkg_stride, void *buf, void *bkg, hid_t dxpl_id)
+    size_t buf_stride, size_t bkg_stride, void *buf, void *bkg)
 {
-    H5T_vlen_alloc_info_t _vl_alloc_info;       /* VL allocation info buffer */
-    H5T_vlen_alloc_info_t *vl_alloc_info = &_vl_alloc_info;   /* VL allocation info */
+    H5T_vlen_alloc_info_t vl_alloc_info;/* VL allocation info */
     H5T_path_t	*tpath = NULL;		/* Type conversion path		     */
     hbool_t     noop_conv = FALSE;      /* Flag to indicate a noop conversion */
     hbool_t     write_to_file = FALSE;  /* Flag to indicate writing to file */
@@ -3189,7 +3106,7 @@ H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             dst_base_size = H5T_get_size(dst->shared->parent);
 
             /* Set up conversion path for base elements */
-            if(NULL == (tpath = H5T_path_find(src->shared->parent, dst->shared->parent, NULL, NULL, dxpl_id, FALSE)))
+            if(NULL == (tpath = H5T_path_find(src->shared->parent, dst->shared->parent)))
                 HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest datatypes")
             else if(!H5T_path_noop(tpath)) {
                 if((tsrc_id = H5I_register(H5I_DATATYPE, H5T_copy(src->shared->parent, H5T_COPY_ALL), FALSE)) < 0 ||
@@ -3210,7 +3127,7 @@ H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             } /* end if */
 
             /* Get the allocation info */
-            if(H5T_vlen_get_alloc_info(dxpl_id, &vl_alloc_info) < 0)
+            if(H5CX_get_vlen_alloc_info(&vl_alloc_info) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to retrieve VL allocation info")
 
             /* Set flags to indicate we are writing to or reading from the file */
@@ -3265,7 +3182,7 @@ H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                     /* Check for "nil" source sequence */
                     if((*(src->shared->u.vlen.isnull))(src->shared->u.vlen.f, s)) {
                         /* Write "nil" sequence to destination location */
-                        if((*(dst->shared->u.vlen.setnull))(dst->shared->u.vlen.f, dxpl_id, d, b) < 0)
+                        if((*(dst->shared->u.vlen.setnull))(dst->shared->u.vlen.f, d, b) < 0)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "can't set VL data to 'nil'")
                     } /* end if */
                     else {
@@ -3306,7 +3223,7 @@ H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                             } /* end if */
 
                             /* Read in VL sequence */
-                            if((*(src->shared->u.vlen.read))(src->shared->u.vlen.f, dxpl_id, s, conv_buf, src_size) < 0)
+                            if((*(src->shared->u.vlen.read))(src->shared->u.vlen.f, s, conv_buf, src_size) < 0)
                                 HGOTO_ERROR(H5E_DATATYPE, H5E_READERROR, FAIL, "can't read VL data")
                         } /* end else */
 
@@ -3336,7 +3253,7 @@ H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                                     } /* end if */
                                     H5F_addr_decode(dst->shared->u.vlen.f, &tmp, &(bg_hobjid.addr));
                                     UINT32DECODE(tmp, bg_hobjid.idx);
-                                    if(NULL == H5HG_read(dst->shared->u.vlen.f, dxpl_id, &bg_hobjid, tmp_buf, NULL))
+                                    if(NULL == H5HG_read(dst->shared->u.vlen.f, &bg_hobjid, tmp_buf, NULL))
                                         HGOTO_ERROR(H5E_DATATYPE, H5E_READERROR, FAIL, "can't read VL sequence into background buffer")
                                 } /* end if */
 
@@ -3346,12 +3263,12 @@ H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                             } /* end if */
 
                             /* Convert VL sequence */
-                            if(H5T_convert(tpath, tsrc_id, tdst_id, seq_len, (size_t)0, (size_t)0, conv_buf, tmp_buf, dxpl_id) < 0)
+                            if(H5T_convert(tpath, tsrc_id, tdst_id, seq_len, (size_t)0, (size_t)0, conv_buf, tmp_buf) < 0)
                                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
                         } /* end if */
 
                         /* Write sequence to destination location */
-                        if((*(dst->shared->u.vlen.write))(dst->shared->u.vlen.f, dxpl_id, vl_alloc_info, d, conv_buf, b, seq_len, dst_base_size) < 0)
+                        if((*(dst->shared->u.vlen.write))(dst->shared->u.vlen.f, &vl_alloc_info, d, conv_buf, b, seq_len, dst_base_size) < 0)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "can't write VL data")
 
                         if(!noop_conv) {
@@ -3368,7 +3285,7 @@ H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                                     if(parent_seq_len > 0) {
                                         H5F_addr_decode(dst->shared->u.vlen.f, &tmp, &(parent_hobjid.addr));
                                         UINT32DECODE(tmp, parent_hobjid.idx);
-                                        if(H5HG_remove(dst->shared->u.vlen.f, dxpl_id, &parent_hobjid) < 0)
+                                        if(H5HG_remove(dst->shared->u.vlen.f, &parent_hobjid) < 0)
                                             HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "Unable to remove heap object")
                                     } /* end if */
                                 } /* end for */
@@ -3423,14 +3340,11 @@ done:
  * Programmer:	Quincey Koziol
  *		Monday, November 6, 2000
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_array(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-	      size_t buf_stride, size_t bkg_stride, void *_buf,
-              void H5_ATTR_UNUSED *_bkg, hid_t dxpl_id)
+    size_t buf_stride, size_t bkg_stride, void *_buf, void H5_ATTR_UNUSED *_bkg)
 {
     H5T_path_t	*tpath;		        /* Type conversion path		     */
     hid_t       tsrc_id = -1, tdst_id = -1;/*temporary type atoms	     */
@@ -3509,7 +3423,7 @@ H5T__conv_array(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             dst_delta = (ssize_t)direction * (ssize_t)(buf_stride ? buf_stride : dst->shared->size);
 
             /* Set up conversion path for base elements */
-            if(NULL == (tpath = H5T_path_find(src->shared->parent, dst->shared->parent, NULL, NULL, dxpl_id, FALSE))) {
+            if(NULL == (tpath = H5T_path_find(src->shared->parent, dst->shared->parent))) {
                 HGOTO_ERROR(H5E_DATATYPE, H5E_UNSUPPORTED, FAIL, "unable to convert between src and dest datatypes")
             } else if (!H5T_path_noop(tpath)) {
                 if((tsrc_id = H5I_register(H5I_DATATYPE, H5T_copy(src->shared->parent, H5T_COPY_ALL), FALSE)) < 0 ||
@@ -3533,7 +3447,7 @@ H5T__conv_array(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 HDmemmove(dp, sp, src->shared->size);
 
                 /* Convert array */
-                if(H5T_convert(tpath, tsrc_id, tdst_id, src->shared->u.array.nelem, (size_t)0, bkg_stride, dp, bkg_buf, dxpl_id) < 0)
+                if(H5T_convert(tpath, tsrc_id, tdst_id, src->shared->u.array.nelem, (size_t)0, bkg_stride, dp, bkg_buf) < 0)
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
                 /* Advance the source & destination pointers */
@@ -3573,26 +3487,11 @@ done:
  * Programmer:	Robb Matzke
  *		Wednesday, June 10, 1998
  *
- * Modifications:
- *		Robb Matzke, 7 Jul 1998
- *		Added overflow handling.
- *
- *		Robb Matzke, 1999-06-16
- *		Added support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
- *
- *              Raymond Lu
- *              Wednesday, April 21, 2004
- *              There is a new design for exception handling like overflow,
- *              which is passed in as a transfer property.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_i_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-    hid_t dxpl_id)
+    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_t	*src = NULL;		/*source datatype		*/
     H5T_t	*dst = NULL;		/*destination datatype		*/
@@ -3607,7 +3506,6 @@ H5T__conv_i_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
     size_t	first;
     ssize_t	sfirst;			/*a signed version of `first'	*/
     size_t	i;                      /*Local index variables         */
-    H5P_genplist_t      *plist;         /*property list pointer         */
     H5T_conv_cb_t       cb_struct={NULL, NULL};      /*conversion callback structure */
     H5T_conv_ret_t      except_ret;     /*return of callback function   */
     hbool_t             reverse;        /*if reverse the order of destination        */
@@ -3670,13 +3568,9 @@ H5T__conv_i_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             src_delta = (ssize_t)direction * (ssize_t)(buf_stride ? buf_stride : src->shared->size);
             dst_delta = (ssize_t)direction * (ssize_t)(buf_stride ? buf_stride : dst->shared->size);
 
-            /* Get the plist structure */
-            if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
-                HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find property list for ID")
-
             /* Get conversion exception callback property */
-            if(H5P_get(plist,H5D_XFER_CONV_CB_NAME, &cb_struct) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
+            if(H5CX_get_dt_conv_cb(&cb_struct) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
 
             /* Allocate space for order-reversed source buffer */
             src_rev = (uint8_t*)H5MM_calloc(src->shared->size);
@@ -3984,29 +3878,11 @@ done:
  * Programmer:	Robb Matzke
  *		Tuesday, June 23, 1998
  *
- * Modifications:
- *		Robb Matzke, 7 Jul 1998
- *		Added overflow handling.
- *
- *		Robb Matzke, 1999-06-16
- *		Added support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
- *
- *              Robb Matzke, 2001-02-02
- *              Oops, forgot to increment the exponent when rounding the
- *              significand resulted in a carry. Thanks to Guillaume Colin
- *              de Verdiere for finding this one!
- *
- *              Raymond Lu, 2006-03-13
- *              Added support for VAX floating-point types.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-    hid_t dxpl_id)
+    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg)
 {
     /* Traversal-related variables */
     H5T_t	*src_p;			/*source datatype		*/
@@ -4036,7 +3912,6 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
     size_t	i;			/*miscellaneous counters	*/
     size_t	implied;		/*destination implied bits	*/
     hbool_t     denormalized = FALSE;   /*is either source or destination denormalized?*/
-    H5P_genplist_t      *plist;         /*property list pointer         */
     H5T_conv_cb_t       cb_struct = {NULL, NULL};      /*conversion callback structure */
     H5T_conv_ret_t      except_ret;     /*return of callback function   */
     hbool_t             reverse;        /*if reverse the order of destination        */
@@ -4081,13 +3956,15 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 sp = dp = (uint8_t*)buf;
                 direction = 1;
                 olap = nelmts;
-            } else if (src_p->shared->size>=dst_p->shared->size) {
+            }
+            else if (src_p->shared->size>=dst_p->shared->size) {
                 double olap_d = HDceil((double)(dst_p->shared->size)/
                                        (double)(src_p->shared->size-dst_p->shared->size));
                 olap = (size_t)olap_d;
                 sp = dp = (uint8_t*)buf;
                 direction = 1;
-            } else {
+            }
+            else {
                 double olap_d = HDceil((double)(src_p->shared->size)/
                                        (double)(dst_p->shared->size-src_p->shared->size));
                 olap = (size_t)olap_d;
@@ -4105,13 +3982,9 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             src_delta = (ssize_t)direction * (ssize_t)(buf_stride ? buf_stride : src_p->shared->size);
             dst_delta = (ssize_t)direction * (ssize_t)(buf_stride ? buf_stride : dst_p->shared->size);
 
-            /* Get the plist structure */
-            if(NULL == (plist = H5P_object_verify(dxpl_id,H5P_DATASET_XFER)))
-                HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find property list for ID")
-
             /* Get conversion exception callback property */
-            if(H5P_get(plist,H5D_XFER_CONV_CB_NAME, &cb_struct) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
+            if(H5CX_get_dt_conv_cb(&cb_struct) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
 
             /* Allocate space for order-reversed source buffer */
             src_rev = (uint8_t*)H5MM_calloc(src_p->shared->size);
@@ -4129,7 +4002,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 if (direction>0) {
                     s = sp;
                     d = elmtno<olap ? dbuf : dp;
-                } else {
+                }
+                else {
                     s = sp;
                     d = elmtno+olap >= nelmts ? dbuf : dp;
                 }
@@ -4138,7 +4012,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 if (d==dbuf) {
                     HDassert((dp>=sp && dp<sp+src_p->shared->size) ||
                             (sp>=dp && sp<dp+dst_p->shared->size));
-                } else {
+                }
+                else {
                     HDassert((dp<sp && dp+dst_p->shared->size<=sp) ||
                             (sp<dp && sp+src_p->shared->size<=dp));
                 }
@@ -4156,7 +4031,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         s[src_p->shared->size-(i+1)] = s[i];
                         s[i] = tmp1;
                     }
-                } else if (H5T_ORDER_VAX==src.order) {
+                }
+                else if (H5T_ORDER_VAX==src.order) {
                     tsize = src_p->shared->size;
                     HDassert(0 == tsize % 2);
 
@@ -4189,7 +4065,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         H5T__bit_set (d, dst.u.f.epos, dst.u.f.esize, FALSE);
                         H5T__bit_set (d, dst.u.f.mpos, dst.u.f.msize, FALSE);
                         goto padding;
-                    } else if (H5T__bit_find (s, src.u.f.epos, src.u.f.esize,
+                    }
+                    else if (H5T__bit_find (s, src.u.f.epos, src.u.f.esize,
                                              H5T_BIT_LSB, FALSE)<0) {
                         /* +Inf or -Inf */
                         if(cb_struct.func) { /*If user's exception handler is present, use it*/
@@ -4212,16 +4089,19 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                              *this case.*/
                             if (H5T_NORM_NONE==dst.u.f.norm)
                                 H5T__bit_set (d, dst.u.f.mpos+dst.u.f.msize-1, (size_t)1, TRUE);
-                        } else if(except_ret == H5T_CONV_HANDLED) {
+                        }
+                        else if(except_ret == H5T_CONV_HANDLED) {
                             /*No need to reverse the order of destination because user handles it*/
                             reverse = FALSE;
                             goto next;
-                        } else if(except_ret == H5T_CONV_ABORT)
+                        }
+                        else if(except_ret == H5T_CONV_ABORT)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "can't handle conversion exception")
 
                         goto padding;
                     }
-                } else if (H5T_NORM_NONE==src.u.f.norm && H5T__bit_find (s, src.u.f.mpos, src.u.f.msize-1,
+                }
+                else if (H5T_NORM_NONE==src.u.f.norm && H5T__bit_find (s, src.u.f.mpos, src.u.f.msize-1,
                                   H5T_BIT_LSB, TRUE)<0 && H5T__bit_find (s, src.u.f.epos, src.u.f.esize,
                                   H5T_BIT_LSB, FALSE)<0) {
                     /*This is a special case for the source of no implied mantissa bit.
@@ -4248,11 +4128,13 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                          *this case.*/
                         if (H5T_NORM_NONE==dst.u.f.norm)
                             H5T__bit_set (d, dst.u.f.mpos+dst.u.f.msize-1, (size_t)1, TRUE);
-                    } else if(except_ret == H5T_CONV_HANDLED) {
+                    }
+                    else if(except_ret == H5T_CONV_HANDLED) {
                         /*No need to reverse the order of destination because user handles it*/
                         reverse = FALSE;
                         goto next;
-                    } else if(except_ret == H5T_CONV_ABORT)
+                    }
+                    else if(except_ret == H5T_CONV_ABORT)
                         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "can't handle conversion exception")
 
                     goto padding;
@@ -4261,7 +4143,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  * still need to handle legacy VAX files so this code must
                  * remain in place.
                  */
-                } else if (H5T__bit_find (s, src.u.f.epos, src.u.f.esize,
+                }
+                else if (H5T__bit_find (s, src.u.f.epos, src.u.f.esize,
                                          H5T_BIT_LSB, FALSE)<0) {
                     /* NaN */
                     if(cb_struct.func) { /*If user's exception handler is present, use it*/
@@ -4277,11 +4160,13 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         H5T__bit_copy (d, dst.u.f.sign, s, src.u.f.sign, (size_t)1);
                         H5T__bit_set (d, dst.u.f.epos, dst.u.f.esize, TRUE);
                         H5T__bit_set(d, dst.u.f.mpos, dst.u.f.msize, TRUE);
-                    } else if(except_ret == H5T_CONV_HANDLED) {
+                    }
+                    else if(except_ret == H5T_CONV_HANDLED) {
                         /*No need to reverse the order of destination because user handles it*/
                         reverse = FALSE;
                         goto next;
-                    } else if(except_ret == H5T_CONV_ABORT)
+                    }
+                    else if(except_ret == H5T_CONV_ABORT)
                         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "can't handle conversion exception")
 
                     goto padding;
@@ -4294,7 +4179,7 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  */
                 expo = (int64_t)H5T__bit_get_d(s, src.u.f.epos, src.u.f.esize);
 
-                if(expo==0)
+                if (expo==0)
                    denormalized=TRUE;
 
                 /*
@@ -4304,16 +4189,19 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 implied = 1;
                 mpos = src.u.f.mpos;
                 mrsh = 0;
-                if(0 == expo || H5T_NORM_NONE == src.u.f.norm) {
-                    if((bitno = H5T__bit_find(s, src.u.f.mpos, src.u.f.msize, H5T_BIT_MSB, TRUE)) > 0) {
+                if (0 == expo || H5T_NORM_NONE == src.u.f.norm) {
+                    if ((bitno = H5T__bit_find(s, src.u.f.mpos, src.u.f.msize, H5T_BIT_MSB, TRUE)) > 0) {
                         msize = (size_t)bitno;
-                    } else if (0==bitno) {
+                    }
+                    else if (0==bitno) {
                         msize = 1;
                         H5T__bit_set(s, src.u.f.mpos, (size_t)1, FALSE);
                     }
-                } else if (H5T_NORM_IMPLIED==src.u.f.norm) {
+                }
+                else if (H5T_NORM_IMPLIED==src.u.f.norm) {
                     msize = src.u.f.msize;
-                } else {
+                }
+                else {
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "normalization method not implemented yet")
                 }
 
@@ -4330,9 +4218,11 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                 if (0==expo || H5T_NORM_NONE==src.u.f.norm) {
                     HDassert(bitno>=0);
                     expo -= (int64_t)((src.u.f.ebias - 1) + (src.u.f.msize - (size_t)bitno));
-                } else if (H5T_NORM_IMPLIED==src.u.f.norm) {
+                }
+                else if (H5T_NORM_IMPLIED==src.u.f.norm) {
                     expo -= (int64_t)src.u.f.ebias;
-                } else {
+                }
+                else {
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "normalization method not implemented yet")
                 }
 
@@ -4355,7 +4245,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                     expo = 0;
                     H5T__bit_set(d, dst.u.f.mpos, dst.u.f.msize, FALSE);
                     msize = 0;
-                } else if (expo<=0) {
+                }
+                else if (expo<=0) {
                     /*
                      * The exponent is too small to fit in the exponent field,
                      * but by shifting the mantissa to the right we can
@@ -4365,7 +4256,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                     mrsh += (size_t)(1 - expo);
                     expo = 0;
                     denormalized=TRUE;
-                } else if (expo>=expo_max) {
+                }
+                else if (expo>=expo_max) {
                     /*
                      * The exponent is too large to fit in the available region
                      * or it results in the maximum possible value.	 Use positive
@@ -4385,7 +4277,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         expo = expo_max;
                         H5T__bit_set(d, dst.u.f.mpos, dst.u.f.msize, FALSE);
                         msize = 0;
-                    } else if(except_ret == H5T_CONV_ABORT)
+                    }
+                    else if(except_ret == H5T_CONV_ABORT)
                         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "can't handle conversion exception")
                     else if(except_ret == H5T_CONV_HANDLED) {
                         reverse = FALSE;
@@ -4412,7 +4305,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                             if(carry)
                                 implied = 2;
                         }
-                    } else if(H5T__bit_get_d(s, (mpos + (size_t)bitno) - 1, (size_t)1) && denormalized)
+                    }
+                    else if(H5T__bit_get_d(s, (mpos + (size_t)bitno) - 1, (size_t)1) && denormalized)
                         /* For either source or destination, denormalized value doesn't increment carry.*/
                         H5T__bit_inc(s, mpos + (size_t)bitno - 1, 1 + msize - (size_t)bitno);
                 }
@@ -4424,13 +4318,16 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  */
                 if (mrsh>dst.u.f.msize+1) {
                     H5T__bit_set(d, dst.u.f.mpos, dst.u.f.msize, FALSE);
-                } else if (mrsh==dst.u.f.msize+1) {
+                }
+                else if (mrsh==dst.u.f.msize+1) {
                     H5T__bit_set(d, dst.u.f.mpos+1, dst.u.f.msize-1, FALSE);
                     H5T__bit_set(d, dst.u.f.mpos, (size_t)1, TRUE);
-                } else if (mrsh==dst.u.f.msize) {
+                }
+                else if (mrsh==dst.u.f.msize) {
                     H5T__bit_set(d, dst.u.f.mpos, dst.u.f.msize, FALSE);
                     H5T__bit_set_d(d, dst.u.f.mpos, MIN(2, dst.u.f.msize), (hsize_t)implied);
-                } else {
+                }
+                else {
                     if (mrsh>0) {
                         H5T__bit_set(d, dst.u.f.mpos+dst.u.f.msize-mrsh, mrsh,
                                     FALSE);
@@ -4441,7 +4338,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         H5T__bit_copy(d, dst.u.f.mpos,
                                      s, (mpos+msize+mrsh-dst.u.f.msize),
                                      dst.u.f.msize-mrsh);
-                    } else {
+                    }
+                    else {
                         H5T__bit_copy(d, dst.u.f.mpos+dst.u.f.msize-(mrsh+msize),
                                      s, mpos, msize);
                         H5T__bit_set(d, dst.u.f.mpos, dst.u.f.msize-(mrsh+msize),
@@ -4471,7 +4369,8 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         if(except_ret == H5T_CONV_UNHANDLED) {
                             expo = expo_max;
                             H5T__bit_set(d, dst.u.f.mpos, dst.u.f.msize, FALSE);
-                        } else if(except_ret == H5T_CONV_ABORT)
+                        }
+                        else if(except_ret == H5T_CONV_ABORT)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "can't handle conversion exception")
                         else if(except_ret == H5T_CONV_HANDLED) {
                             reverse = FALSE;
@@ -4564,22 +4463,12 @@ done:
  * Programmer:	Robb Matzke
  *		Friday, August	7, 1998
  *
- * Modifications:
- *		Robb Matzke, 1999-06-16
- *		Added support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
- *
- *              Raymond Lu, 8 November 2011
- *              I put a condition check to prevent the conversion of strings
- *              between ASCII and UTF8.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_s_s(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-	      size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf,
-              void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf,
+    void H5_ATTR_UNUSED *bkg)
 {
     H5T_t	*src=NULL;		/*source datatype		*/
     H5T_t	*dst=NULL;		/*destination datatype		*/
@@ -4808,15 +4697,12 @@ done:
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_su(SCHAR, UCHAR, signed char, unsigned char, -, -);
 }
@@ -4834,15 +4720,12 @@ H5T__conv_schar_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_us(UCHAR, SCHAR, unsigned char, signed char, -, SCHAR_MAX);
 }
@@ -4860,15 +4743,12 @@ H5T__conv_uchar_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(SCHAR, SHORT, signed char, short, -, -);
 }
@@ -4886,15 +4766,12 @@ H5T__conv_schar_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(SCHAR, USHORT, signed char, unsigned short, -, -);
 }
@@ -4912,15 +4789,12 @@ H5T__conv_schar_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(UCHAR, SHORT, unsigned char, short, -, SHRT_MAX);
 }
@@ -4938,15 +4812,12 @@ H5T__conv_uchar_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(UCHAR, USHORT, unsigned char, unsigned short, -, -);
 }
@@ -4964,14 +4835,12 @@ H5T__conv_uchar_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(SCHAR, INT, signed char, int, -, -);
 }
@@ -4989,14 +4858,12 @@ H5T__conv_schar_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(SCHAR, UINT, signed char, unsigned, -, -);
 }
@@ -5014,14 +4881,12 @@ H5T__conv_schar_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(UCHAR, INT, unsigned char, int, -, INT_MAX);
 }
@@ -5039,14 +4904,12 @@ H5T__conv_uchar_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(UCHAR, UINT, unsigned char, unsigned, -, -);
 }
@@ -5064,14 +4927,12 @@ H5T__conv_uchar_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(SCHAR, LONG, signed char, long, -, -);
 }
@@ -5089,15 +4950,12 @@ H5T__conv_schar_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(SCHAR, ULONG, signed char, unsigned long, -, -);
 }
@@ -5115,14 +4973,12 @@ H5T__conv_schar_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(UCHAR, LONG, unsigned char, long, -, LONG_MAX);
 }
@@ -5140,15 +4996,12 @@ H5T__conv_uchar_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(UCHAR, ULONG, unsigned char, unsigned long, -, -);
 }
@@ -5166,15 +5019,12 @@ H5T__conv_uchar_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(SCHAR, LLONG, signed char, long long, -, -);
 }
@@ -5192,15 +5042,12 @@ H5T__conv_schar_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(SCHAR, ULLONG, signed char, unsigned long long, -, -);
 }
@@ -5218,15 +5065,12 @@ H5T__conv_schar_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(UCHAR, LLONG, unsigned char, long long, -, LLONG_MAX);
 }
@@ -5244,15 +5088,12 @@ H5T__conv_uchar_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(UCHAR, ULLONG, unsigned char, unsigned long long, -, -);
 }
@@ -5270,15 +5111,12 @@ H5T__conv_uchar_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(SHORT, SCHAR, short, signed char, SCHAR_MIN, SCHAR_MAX);
 }
@@ -5296,15 +5134,12 @@ H5T__conv_short_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(SHORT, UCHAR, short, unsigned char, -, UCHAR_MAX);
 }
@@ -5322,15 +5157,12 @@ H5T__conv_short_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(USHORT, SCHAR, unsigned short, signed char, -, SCHAR_MAX);
 }
@@ -5348,15 +5180,12 @@ H5T__conv_ushort_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(USHORT, UCHAR, unsigned short, unsigned char, -, UCHAR_MAX);
 }
@@ -5374,15 +5203,12 @@ H5T__conv_ushort_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_su(SHORT, USHORT, short, unsigned short, -, -);
 }
@@ -5400,15 +5226,12 @@ H5T__conv_short_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_us(USHORT, SHORT, unsigned short, short, -, SHRT_MAX);
 }
@@ -5426,15 +5249,12 @@ H5T__conv_ushort_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride,
-                   size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		   hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(SHORT, INT, short, int, -, -);
 }
@@ -5452,15 +5272,12 @@ H5T__conv_short_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride,
-                    size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		    hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(SHORT, UINT, short, unsigned, -, -);
 }
@@ -5478,15 +5295,12 @@ H5T__conv_short_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride,
-                    size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		    hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(USHORT, INT, unsigned short, int, -, INT_MAX);
 }
@@ -5504,15 +5318,12 @@ H5T__conv_ushort_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(USHORT, UINT, unsigned short, unsigned, -, -);
 }
@@ -5530,15 +5341,12 @@ H5T__conv_ushort_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride,
-                    size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		    hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(SHORT, LONG, short, long, -, -);
 }
@@ -5556,15 +5364,12 @@ H5T__conv_short_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(SHORT, ULONG, short, unsigned long, -, -);
 }
@@ -5582,15 +5387,12 @@ H5T__conv_short_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(USHORT, LONG, unsigned short, long, -, LONG_MAX);
 }
@@ -5608,15 +5410,12 @@ H5T__conv_ushort_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(USHORT, ULONG, unsigned short, unsigned long, -, -);
 }
@@ -5634,15 +5433,12 @@ H5T__conv_ushort_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(SHORT, LLONG, short, long long, -, -);
 }
@@ -5660,15 +5456,12 @@ H5T__conv_short_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(SHORT, ULLONG, short, unsigned long long, -, -);
 }
@@ -5686,15 +5479,12 @@ H5T__conv_short_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(USHORT, LLONG, unsigned short, long long, -, LLONG_MAX);
 }
@@ -5712,15 +5502,12 @@ H5T__conv_ushort_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(USHORT, ULLONG, unsigned short, unsigned long long, -, -);
 }
@@ -5738,15 +5525,12 @@ H5T__conv_ushort_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride,
-                   size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		   hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(INT, SCHAR, int, signed char, SCHAR_MIN, SCHAR_MAX);
 }
@@ -5764,15 +5548,12 @@ H5T__conv_int_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride,
-                   size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		   hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(INT, UCHAR, int, unsigned char, -, UCHAR_MAX);
 }
@@ -5790,15 +5571,12 @@ H5T__conv_int_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride,
-                    size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		    hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(UINT, SCHAR, unsigned, signed char, -, SCHAR_MAX);
 }
@@ -5816,15 +5594,12 @@ H5T__conv_uint_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride,
-                    size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		    hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(UINT, UCHAR, unsigned, unsigned char, -, UCHAR_MAX);
 }
@@ -5842,15 +5617,12 @@ H5T__conv_uint_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride,
-                   size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		   hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(INT, SHORT, int, short, SHRT_MIN, SHRT_MAX);
 }
@@ -5868,15 +5640,12 @@ H5T__conv_int_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride,
-                    size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		    hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(INT, USHORT, int, unsigned short, -, USHRT_MAX);
 }
@@ -5894,15 +5663,12 @@ H5T__conv_int_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride,
-                    size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		    hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(UINT, SHORT, unsigned, short, -, SHRT_MAX);
 }
@@ -5920,15 +5686,12 @@ H5T__conv_uint_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(UINT, USHORT, unsigned, unsigned short, -, USHRT_MAX);
 }
@@ -5946,14 +5709,12 @@ H5T__conv_uint_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		  size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                  void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_su(INT, UINT, int, unsigned, -, -);
 }
@@ -5971,14 +5732,12 @@ H5T__conv_int_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		  size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                  void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_us(UINT, INT, unsigned, int, -, INT_MAX);
 }
@@ -5996,14 +5755,12 @@ H5T__conv_uint_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		  size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                  void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(INT, LONG, int, long, -, -);
 }
@@ -6021,14 +5778,12 @@ H5T__conv_int_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(INT, LONG, int, unsigned long, -, -);
 }
@@ -6046,14 +5801,12 @@ H5T__conv_int_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(UINT, LONG, unsigned, long, -, LONG_MAX);
 }
@@ -6071,14 +5824,12 @@ H5T__conv_uint_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(UINT, ULONG, unsigned, unsigned long, -, -);
 }
@@ -6096,14 +5847,12 @@ H5T__conv_uint_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(INT, LLONG, int, long long, -, -);
 }
@@ -6121,14 +5870,12 @@ H5T__conv_int_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(INT, ULLONG, int, unsigned long long, -, -);
 }
@@ -6146,14 +5893,12 @@ H5T__conv_int_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(UINT, LLONG, unsigned, long long, -, LLONG_MAX);
 }
@@ -6171,15 +5916,12 @@ H5T__conv_uint_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(UINT, ULLONG, unsigned, unsigned long long, -, -);
 }
@@ -6197,14 +5939,12 @@ H5T__conv_uint_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(LONG, SCHAR, long, signed char, SCHAR_MIN, SCHAR_MAX);
 }
@@ -6222,14 +5962,12 @@ H5T__conv_long_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(LONG, UCHAR, long, unsigned char, -, UCHAR_MAX);
 }
@@ -6247,15 +5985,12 @@ H5T__conv_long_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(ULONG, SCHAR, unsigned long, signed char, -, SCHAR_MAX);
 }
@@ -6273,15 +6008,12 @@ H5T__conv_ulong_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(ULONG, UCHAR, unsigned long, unsigned char, -, UCHAR_MAX);
 }
@@ -6299,14 +6031,12 @@ H5T__conv_ulong_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(LONG, SHORT, long, short, SHRT_MIN, SHRT_MAX);
 }
@@ -6324,15 +6054,12 @@ H5T__conv_long_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(LONG, USHORT, long, unsigned short, -, USHRT_MAX);
 }
@@ -6350,14 +6077,12 @@ H5T__conv_long_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                     void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(ULONG, SHORT, unsigned long, short, -, SHRT_MAX);
 }
@@ -6375,15 +6100,12 @@ H5T__conv_ulong_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(ULONG, USHORT, unsigned long, unsigned short, -, USHRT_MAX);
 }
@@ -6401,14 +6123,12 @@ H5T__conv_ulong_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		  size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                  void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(LONG, INT, long, int, INT_MIN, INT_MAX);
 }
@@ -6426,14 +6146,12 @@ H5T__conv_long_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(LONG, UINT, long, unsigned, -, UINT_MAX);
 }
@@ -6451,14 +6169,12 @@ H5T__conv_long_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(ULONG, INT, unsigned long, int, -, INT_MAX);
 }
@@ -6476,14 +6192,12 @@ H5T__conv_ulong_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(ULONG, UINT, unsigned long, unsigned, -, UINT_MAX);
 }
@@ -6501,14 +6215,12 @@ H5T__conv_ulong_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_su(LONG, ULONG, long, unsigned long, -, -);
 }
@@ -6526,14 +6238,12 @@ H5T__conv_long_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_us(ULONG, LONG, unsigned long, long, -, LONG_MAX);
 }
@@ -6551,14 +6261,12 @@ H5T__conv_ulong_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sS(LONG, LLONG, long, long long, -, -);
 }
@@ -6576,15 +6284,12 @@ H5T__conv_long_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_sU(LONG, ULLONG, long, unsigned long long, -, -);
 }
@@ -6602,15 +6307,12 @@ H5T__conv_long_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uS(ULONG, LLONG, unsigned long, long long, -, LLONG_MAX);
 }
@@ -6628,15 +6330,12 @@ H5T__conv_ulong_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_uU(ULONG, ULLONG, unsigned long, unsigned long long, -, -);
 }
@@ -6654,15 +6353,12 @@ H5T__conv_ulong_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(LLONG, SCHAR, long long, signed char, SCHAR_MIN, SCHAR_MAX);
 }
@@ -6680,15 +6376,12 @@ H5T__conv_llong_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(LLONG, UCHAR, long long, unsigned char, -, UCHAR_MAX);
 }
@@ -6706,15 +6399,12 @@ H5T__conv_llong_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(ULLONG, SCHAR, unsigned long long, signed char, -, SCHAR_MAX);
 }
@@ -6732,15 +6422,12 @@ H5T__conv_ullong_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-                      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(ULLONG, UCHAR, unsigned long long, unsigned char, -, UCHAR_MAX);
 }
@@ -6758,15 +6445,12 @@ H5T__conv_ullong_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(LLONG, SHORT, long long, short, SHRT_MIN, SHRT_MAX);
 }
@@ -6784,15 +6468,12 @@ H5T__conv_llong_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(LLONG, USHORT, long long, unsigned short, -, USHRT_MAX);
 }
@@ -6810,15 +6491,12 @@ H5T__conv_llong_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(ULLONG, SHORT, unsigned long long, short, -, SHRT_MAX);
 }
@@ -6836,15 +6514,12 @@ H5T__conv_ullong_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(ULLONG, USHORT, unsigned long long, unsigned short, -, USHRT_MAX);
 }
@@ -6862,14 +6537,12 @@ H5T__conv_ullong_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		   size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                   void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(LLONG, INT, long long, int, INT_MIN, INT_MAX);
 }
@@ -6887,14 +6560,12 @@ H5T__conv_llong_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(LLONG, UINT, long long, unsigned, -, UINT_MAX);
 }
@@ -6912,14 +6583,12 @@ H5T__conv_llong_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(ULLONG, INT, unsigned long long, int, -, INT_MAX);
 }
@@ -6937,15 +6606,12 @@ H5T__conv_ullong_int(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(ULLONG, UINT, unsigned long long, unsigned, -, UINT_MAX);
 }
@@ -6963,14 +6629,12 @@ H5T__conv_ullong_uint(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
-                    void *buf, void H5_ATTR_UNUSED *bkg, hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ss(LLONG, LONG, long long, long, LONG_MIN, LONG_MAX);
 }
@@ -6988,15 +6652,12 @@ H5T__conv_llong_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Su(LLONG, ULONG, long long, unsigned long, -, ULONG_MAX);
 }
@@ -7014,15 +6675,12 @@ H5T__conv_llong_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		     size_t nelmts, size_t buf_stride,
-                     size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-		     hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Us(ULLONG, LONG, unsigned long long, long, -, LONG_MAX);
 }
@@ -7040,15 +6698,12 @@ H5T__conv_ullong_long(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Friday, November 13, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Uu(ULLONG, ULONG, unsigned long long, unsigned long, -, ULONG_MAX);
 }
@@ -7066,15 +6721,12 @@ H5T__conv_ullong_ulong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_su(LLONG, ULLONG, long long, unsigned long long, -, -);
 }
@@ -7092,15 +6744,12 @@ H5T__conv_llong_ullong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Monday, November 16, 1998
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		      size_t nelmts, size_t buf_stride,
-                      size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                      hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_us(ULLONG, LLONG, unsigned long long, long long, -, LLONG_MAX);
 }
@@ -7117,19 +6766,12 @@ H5T__conv_ullong_llong(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Tuesday, June 23, 1998
  *
- * Modifications:
- *		Robb Matzke, 1999-06-16
- *		Added support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_fF(FLOAT, DOUBLE, float, double, -, -);
 }
@@ -7146,16 +6788,13 @@ H5T__conv_float_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, Feb 25, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5_SIZEOF_LONG_DOUBLE != 0
 herr_t
 H5T__conv_float_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_fF(FLOAT, LDOUBLE, float, long double, -, -);
 }
@@ -7173,22 +6812,12 @@ H5T__conv_float_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Robb Matzke
  *		Tuesday, June 23, 1998
  *
- * Modifications:
- *		Robb Matzke, 7 Jul 1998
- *		Added overflow handling.
- *
- *		Robb Matzke, 1999-06-16
- *		Added support for non-zero strides. If BUF_STRIDE is non-zero
- *		then convert one value at each memory location advancing
- *		BUF_STRIDE bytes each time; otherwise assume both source and
- *		destination values are packed.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ff(DOUBLE, FLOAT, double, float, -FLT_MAX, FLT_MAX);
 }
@@ -7205,16 +6834,13 @@ H5T__conv_double_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, Feb 25, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5_SIZEOF_LONG_DOUBLE != 0
 herr_t
 H5T__conv_double_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_fF(DOUBLE, LDOUBLE, double, long double, -, -);
 }
@@ -7232,16 +6858,13 @@ H5T__conv_double_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, Feb 25, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5_SIZEOF_LONG_DOUBLE != 0
 herr_t
 H5T__conv_ldouble_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ff(LDOUBLE, FLOAT, long double, float, -FLT_MAX, FLT_MAX);
 }
@@ -7259,16 +6882,13 @@ H5T__conv_ldouble_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, Feb 25, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5_SIZEOF_LONG_DOUBLE != 0
 herr_t
 H5T__conv_ldouble_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_Ff(LDOUBLE, DOUBLE, long double, double, -DBL_MAX, DBL_MAX);
 }
@@ -7286,15 +6906,12 @@ H5T__conv_ldouble_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(SCHAR, FLOAT, signed char, float, -, -);
 }
@@ -7311,15 +6928,12 @@ H5T__conv_schar_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(SCHAR, DOUBLE, signed char, double, -, -);
 }
@@ -7336,15 +6950,12 @@ H5T__conv_schar_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_schar_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(SCHAR, LDOUBLE, signed char, long double, -, -);
 }
@@ -7361,15 +6972,12 @@ H5T__conv_schar_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(UCHAR, FLOAT, unsigned char, float, -, -);
 }
@@ -7386,15 +6994,12 @@ H5T__conv_uchar_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(UCHAR, DOUBLE, unsigned char, double, -, -);
 }
@@ -7411,15 +7016,12 @@ H5T__conv_uchar_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uchar_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(UCHAR, LDOUBLE, unsigned char, long double, -, -);
 }
@@ -7436,15 +7038,12 @@ H5T__conv_uchar_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(SHORT, FLOAT, short, float, -, -);
 }
@@ -7461,15 +7060,12 @@ H5T__conv_short_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(SHORT, DOUBLE, short, double, -, -);
 }
@@ -7486,15 +7082,12 @@ H5T__conv_short_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_short_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(SHORT, LDOUBLE, short, long double, -, -);
 }
@@ -7511,15 +7104,12 @@ H5T__conv_short_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(USHORT, FLOAT, unsigned short, float, -, -);
 }
@@ -7536,15 +7126,12 @@ H5T__conv_ushort_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(USHORT, DOUBLE, unsigned short, double, -, -);
 }
@@ -7561,15 +7148,12 @@ H5T__conv_ushort_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ushort_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(USHORT, LDOUBLE, unsigned short, long double, -, -);
 }
@@ -7586,15 +7170,12 @@ H5T__conv_ushort_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(INT, FLOAT, int, float, -, -);
 }
@@ -7611,15 +7192,12 @@ H5T__conv_int_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(INT, DOUBLE, int, double, -, -);
 }
@@ -7636,15 +7214,12 @@ H5T__conv_int_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_int_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(INT, LDOUBLE, int, long double, -, -);
 }
@@ -7661,15 +7236,12 @@ H5T__conv_int_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(UINT, FLOAT, unsigned int, float, -, -);
 }
@@ -7686,15 +7258,12 @@ H5T__conv_uint_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(UINT, DOUBLE, unsigned int, double, -, -);
 }
@@ -7711,15 +7280,12 @@ H5T__conv_uint_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_uint_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(UINT, LDOUBLE, unsigned int, long double, -, -);
 }
@@ -7736,15 +7302,12 @@ H5T__conv_uint_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(LONG, FLOAT, long, float, -, -);
 }
@@ -7761,15 +7324,12 @@ H5T__conv_long_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(LONG, DOUBLE, long, double, -, -);
 }
@@ -7786,15 +7346,12 @@ H5T__conv_long_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_long_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(LONG, LDOUBLE, long, long double, -, -);
 }
@@ -7811,15 +7368,12 @@ H5T__conv_long_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(ULONG, FLOAT, unsigned long, float, -, -);
 }
@@ -7836,15 +7390,12 @@ H5T__conv_ulong_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(ULONG, DOUBLE, unsigned long, double, -, -);
 }
@@ -7861,15 +7412,12 @@ H5T__conv_ulong_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ulong_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(ULONG, LDOUBLE, unsigned long, long double, -, -);
 }
@@ -7886,15 +7434,12 @@ H5T__conv_ulong_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(LLONG, FLOAT, long long, float, -, -);
 }
@@ -7911,15 +7456,12 @@ H5T__conv_llong_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_llong_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(LLONG, DOUBLE, long long, double, -, -);
 }
@@ -7936,16 +7478,13 @@ H5T__conv_llong_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5T_CONV_INTERNAL_LLONG_LDOUBLE
 herr_t
 H5T__conv_llong_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(LLONG, LDOUBLE, long long, long double, -, -);
 }
@@ -7963,15 +7502,12 @@ H5T__conv_llong_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(ULLONG, FLOAT, unsigned long long, float, -, -);
 }
@@ -7988,15 +7524,12 @@ H5T__conv_ullong_float (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ullong_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(ULLONG, DOUBLE, unsigned long long, double, -, -);
 }
@@ -8013,16 +7546,13 @@ H5T__conv_ullong_double (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5T_CONV_INTERNAL_ULLONG_LDOUBLE
 herr_t
 H5T__conv_ullong_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
     H5T_CONV_xF(ULLONG, LDOUBLE, unsigned long long, long double, -, -);
 }
@@ -8040,15 +7570,12 @@ H5T__conv_ullong_ldouble (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_schar (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, SCHAR, float, signed char, SCHAR_MIN, SCHAR_MAX);
@@ -8067,15 +7594,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_uchar (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, UCHAR, float, unsigned char, 0, UCHAR_MAX);
@@ -8094,15 +7618,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_schar (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, SCHAR, double, signed char, SCHAR_MIN, SCHAR_MAX);
@@ -8121,15 +7642,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_uchar (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, UCHAR, double, unsigned char, 0, UCHAR_MAX);
@@ -8148,15 +7666,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_schar (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, SCHAR, long double, signed char, SCHAR_MIN, SCHAR_MAX);
@@ -8175,15 +7690,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_uchar (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, UCHAR, long double, unsigned char, 0, UCHAR_MAX);
@@ -8202,15 +7714,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_short (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, SHORT, float, short, SHRT_MIN, SHRT_MAX);
@@ -8229,15 +7738,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_ushort (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, USHORT, float, unsigned short, 0, USHRT_MAX);
@@ -8256,15 +7762,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_short (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, SHORT, double, short, SHRT_MIN, SHRT_MAX);
@@ -8283,15 +7786,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_ushort (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, USHORT, double, unsigned short, 0, USHRT_MAX);
@@ -8310,15 +7810,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_short (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, SHORT, long double, short, SHRT_MIN, SHRT_MAX);
@@ -8337,15 +7834,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_ushort (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, USHORT, long double, unsigned short, 0, USHRT_MAX);
@@ -8364,15 +7858,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_int (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, INT, float, int, INT_MIN, INT_MAX);
@@ -8391,15 +7882,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_uint (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, UINT, float, unsigned int, 0, UINT_MAX);
@@ -8418,15 +7906,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_int (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, INT, double, int, INT_MIN, INT_MAX);
@@ -8445,15 +7930,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_uint (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, UINT, double, unsigned int, 0, UINT_MAX);
@@ -8472,15 +7954,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_int (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, INT, long double, int, INT_MIN, INT_MAX);
@@ -8499,15 +7978,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_uint (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, UINT, long double, unsigned int, 0, UINT_MAX);
@@ -8526,15 +8002,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_long (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, LONG, float, long, LONG_MIN, LONG_MAX);
@@ -8553,15 +8026,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_ulong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, ULONG, float, unsigned long, 0, ULONG_MAX);
@@ -8580,15 +8050,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_long (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, LONG, double, long, LONG_MIN, LONG_MAX);
@@ -8607,15 +8074,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_ulong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, ULONG, double, unsigned long, 0, ULONG_MAX);
@@ -8634,15 +8098,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_long (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, LONG, long double, long, LONG_MIN, LONG_MAX);
@@ -8661,15 +8122,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_ldouble_ulong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, ULONG, long double, unsigned long, 0, ULONG_MAX);
@@ -8688,15 +8146,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_llong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, LLONG, float, long long, LLONG_MIN, LLONG_MAX);
@@ -8715,15 +8170,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_float_ullong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(FLOAT, ULLONG, float, unsigned long long, 0, ULLONG_MAX);
@@ -8742,15 +8194,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_llong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, LLONG, double, long long, LLONG_MIN, LLONG_MAX);
@@ -8769,15 +8218,12 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Friday, November 7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_double_ullong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(DOUBLE, ULLONG, double, unsigned long long, 0, ULLONG_MAX);
@@ -8796,16 +8242,13 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5T_CONV_INTERNAL_LDOUBLE_LLONG
 herr_t
 H5T__conv_ldouble_llong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t H5_ATTR_UNUSED dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, LLONG, long double, long long, LLONG_MIN, LLONG_MAX);
@@ -8825,16 +8268,13 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Tuesday, Febuary 1, 2005
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 #if H5T_CONV_INTERNAL_LDOUBLE_ULLONG
 herr_t
 H5T__conv_ldouble_ullong (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-		       size_t nelmts, size_t buf_stride,
-                       size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-                       hid_t dxpl_id)
+    size_t nelmts, size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride,
+    void *buf, void H5_ATTR_UNUSED *bkg)
 {
 H5_GCC_DIAG_OFF(float-equal)
     H5T_CONV_Fx(LDOUBLE, ULLONG, long double, unsigned long long, 0, ULLONG_MAX);
@@ -8855,8 +8295,6 @@ H5_GCC_DIAG_ON(float-equal)
  * Programmer:	Raymond Lu
  *		Wednesday, Jan 21, 2004
  *
- * Modifications:
- *
  *              Raymond Lu
  *              Wednesday, April 21, 2004
  *              There is a new design for exception handling like overflow,
@@ -8869,8 +8307,7 @@ H5_GCC_DIAG_ON(float-equal)
  */
 herr_t
 H5T__conv_f_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-    hid_t dxpl_id)
+    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg)
 {
     /* Traversal-related variables */
     H5T_t	*src_p;			/*source datatype		*/
@@ -8895,7 +8332,6 @@ H5T__conv_f_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
     size_t	i;			/*miscellaneous counters	*/
     size_t	first;                  /*first bit(MSB) in an integer  */
     ssize_t	sfirst;			/*a signed version of `first'	*/
-    H5P_genplist_t      *plist;         /*Property list pointer         */
     H5T_conv_cb_t       cb_struct={NULL, NULL};      /*conversion callback structure */
     hbool_t     truncated;              /*if fraction value is dropped  */
     hbool_t     reverse;                /*if reverse order of destination at the end */
@@ -8959,13 +8395,9 @@ H5T__conv_f_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             buf_size = (size_t) (HDpow((double)2.0f, (double)src.u.f.esize) / 8 + 1);
             int_buf = (uint8_t*)H5MM_calloc(buf_size);
 
-            /* Get the plist structure. Do I need to close it? */
-            if(NULL == (plist = H5P_object_verify(dxpl_id, H5P_DATASET_XFER)))
-                HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find property list for ID")
-
             /* Get conversion exception callback property */
-            if(H5P_get(plist, H5D_XFER_CONV_CB_NAME, &cb_struct) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
+            if(H5CX_get_dt_conv_cb(&cb_struct) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
 
             /* Allocate space for order-reversed source buffer */
             src_rev = (uint8_t*)H5MM_calloc(src_p->shared->size);
@@ -9441,22 +8873,11 @@ done:
  * Programmer:	Raymond Lu
  *		Friday, Feb 6, 2004
  *
- * Modifications:
- *
- *              Raymond Lu
- *              Wednesday, April 21, 2004
- *              There is a new design for exception handling like overflow,
- *              which is passed in as a transfer property.
- *
- *              Raymond Lu
- *              Monday, March 13, 2006
- *              Added support for VAX floating-point types.
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T__conv_i_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
-    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg,
-    hid_t dxpl_id)
+    size_t buf_stride, size_t H5_ATTR_UNUSED bkg_stride, void *buf, void H5_ATTR_UNUSED *bkg)
 {
     /* Traversal-related variables */
     H5T_t	*src_p;			/*source datatype		*/
@@ -9484,7 +8905,6 @@ H5T__conv_i_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
     size_t	i;			/*miscellaneous counters	*/
     size_t	first;                  /*first bit(MSB) in an integer  */
     ssize_t	sfirst;			/*a signed version of `first'	*/
-    H5P_genplist_t      *plist;         /*Property list pointer         */
     H5T_conv_cb_t       cb_struct = {NULL, NULL};      /*conversion callback structure */
     H5T_conv_ret_t      except_ret;     /*return of callback function   */
     hbool_t             reverse;        /*if reverse the order of destination   */
@@ -9547,13 +8967,9 @@ H5T__conv_i_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
             buf_size = (src.prec > dst.u.f.msize ? src.prec : dst.u.f.msize)/8 + 1;
             int_buf = (uint8_t*)H5MM_calloc(buf_size);
 
-            /* Get the plist structure */
-            if(NULL == (plist = H5P_object_verify(dxpl_id,H5P_DATASET_XFER)))
-                HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find property list for ID")
-
             /* Get conversion exception callback property */
-            if(H5P_get(plist,H5D_XFER_CONV_CB_NAME, &cb_struct) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
+            if(H5CX_get_dt_conv_cb(&cb_struct) < 0)
+                HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to get conversion exception callback")
 
             /* Allocate space for order-reversed source buffer */
             src_rev = (uint8_t*)H5MM_calloc(src_p->shared->size);
@@ -9872,11 +9288,6 @@ done:
  * Programmer:	Raymond Lu
  *		April 26, 2004
  *
- * Modifications:
- *
- *              Raymond Lu
- *              March 13, 2006
- *              Add support for VAX floating-point types.
  *-------------------------------------------------------------------------
  */
 static herr_t
diff --git a/src/H5Tcset.c b/src/H5Tcset.c
index 95658ed..186e598 100644
--- a/src/H5Tcset.c
+++ b/src/H5Tcset.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tdbg.c b/src/H5Tdbg.c
index 8a10cc6..eb648f3 100644
--- a/src/H5Tdbg.c
+++ b/src/H5Tdbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -34,9 +32,9 @@
 /***********/
 /* Headers */
 /***********/
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Tpkg.h"		/* Datatypes         			*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Eprivate.h"         /* Error handling                           */
+#include "H5Tpkg.h"             /* Datatypes                                */
 
 
 /****************/
@@ -76,28 +74,21 @@
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T__print_stats
+ * Function:    H5T__print_stats
  *
- * Purpose:	Print statistics about a conversion path.  Statistics are
- *		printed only if all the following conditions are true:
+ * Purpose:     Print statistics about a conversion path.  Statistics are
+ *              printed only if all the following conditions are true:
  *
- * 		1. The library was compiled with H5T_DEBUG defined.
- *		2. Data type debugging is turned on at run time.
- *		3. The path was called at least one time.
+ *              1. The library was compiled with H5T_DEBUG defined.
+ *              2. Data type debugging is turned on at run time.
+ *              3. The path was called at least one time.
  *
- *		The optional NPRINT argument keeps track of the number of
- *		conversions paths for which statistics have been shown. If
- *		its value is zero then table headers are printed before the
- *		first line of output.
+ *              The optional NPRINT argument keeps track of the number of
+ *              conversions paths for which statistics have been shown. If
+ *              its value is zero then table headers are printed before the
+ *              first line of output.
  *
- * Return:	Success:	non-negative
- *
- *		Failure:	negative
- *
- * Programmer:	Robb Matzke
- *              Monday, December 14, 1998
- *
- * Modifications:
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
@@ -112,34 +103,34 @@ H5T__print_stats(H5T_path_t H5_ATTR_UNUSED * path, int H5_ATTR_UNUSED * nprint/*
     FUNC_ENTER_PACKAGE_NOERR
 
 #ifdef H5T_DEBUG
-    if(H5DEBUG(T) && path->stats.ncalls > 0) {
-	if(nprint && 0 == (*nprint)++) {
-	    HDfprintf(H5DEBUG(T), "H5T: type conversion statistics:\n");
-	    HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
-		       "Conversion", "Elmts", "Calls", "User",
-		       "System", "Elapsed", "Bandwidth");
-	    HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
-		       "----------", "-----", "-----", "----",
-		       "------", "-------", "---------");
-	}
-        if(path->src && path->dst)
+    if (H5DEBUG(T) && path->stats.ncalls > 0) {
+        if (nprint && 0 == (*nprint)++) {
+            HDfprintf(H5DEBUG(T), "H5T: type conversion statistics:\n");
+            HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
+                "Conversion", "Elmts", "Calls", "User",
+                "System", "Elapsed", "Bandwidth");
+            HDfprintf(H5DEBUG(T), "   %-16s %10s %10s %8s %8s %8s %10s\n",
+                "----------", "-----", "-----", "----",
+                "------", "-------", "---------");
+        }
+        if (path->src && path->dst)
             nbytes = MAX(H5T_get_size(path->src), H5T_get_size(path->dst));
-        else if(path->src)
+        else if (path->src)
             nbytes = H5T_get_size(path->src);
-        else if(path->dst)
+        else if (path->dst)
             nbytes = H5T_get_size(path->dst);
         else
             nbytes = 0;
-	nbytes *= path->stats.nelmts;
-	H5_bandwidth(bandwidth, (double)nbytes, path->stats.timer.etime);
-	HDfprintf(H5DEBUG(T), "   %-16s %10Hd %10d %8.2f %8.2f %8.2f %10s\n",
-		   path->name,
-		   path->stats.nelmts,
-		   path->stats.ncalls,
-		   path->stats.timer.utime,
-		   path->stats.timer.stime,
-		   path->stats.timer.etime,
-		   bandwidth);
+        nbytes *= path->stats.nelmts;
+        H5_bandwidth(bandwidth, (double)nbytes, path->stats.timer.etime);
+        HDfprintf(H5DEBUG(T), "   %-16s %10Hd %10d %8.2f %8.2f %8.2f %10s\n",
+            path->name,
+            path->stats.nelmts,
+            path->stats.ncalls,
+            path->stats.timer.utime,
+            path->stats.timer.stime,
+            path->stats.timer.etime,
+            bandwidth);
     }
 #endif
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -147,24 +138,20 @@ H5T__print_stats(H5T_path_t H5_ATTR_UNUSED * path, int H5_ATTR_UNUSED * nprint/*
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_debug
- *
- * Purpose:	Prints information about a data type.
+ * Function:    H5T_debug
  *
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:     Prints information about a data type.
  *
- * Programmer:	Robb Matzke
- *		Wednesday, January  7, 1998
- *
- * Modifications:
+ * Return:      SUCCEED/FAIL
  *
  *-------------------------------------------------------------------------
  */
 herr_t
 H5T_debug(const H5T_t *dt, FILE *stream)
 {
-    const char	*s1 = "", *s2 = "";
-    unsigned	i;
+    const char  *s1 = "";
+    const char  *s2 = "";
+    unsigned    i;
     herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
@@ -173,7 +160,7 @@ H5T_debug(const H5T_t *dt, FILE *stream)
     HDassert(dt);
     HDassert(stream);
 
-    switch(dt->shared->type) {
+    switch (dt->shared->type) {
         case H5T_NO_CLASS:
             HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "no class");
             break;
@@ -223,9 +210,9 @@ H5T_debug(const H5T_t *dt, FILE *stream)
         default:
             s1 = "";
             break;
-    } /* end switch */
+    }  /* end switch */
 
-    switch(dt->shared->state) {
+    switch (dt->shared->state) {
         case H5T_STATE_TRANSIENT:
             s2 = "[transient]";
             break;
@@ -247,14 +234,14 @@ H5T_debug(const H5T_t *dt, FILE *stream)
             break;
         default:
             HDassert(0 && "This Should never be executed!");
-    } /* end switch */
+    }  /* end switch */
 
-    fprintf(stream, "%s%s {nbytes=%lu", s1, s2, (unsigned long)(dt->shared->size));
+    HDfprintf(stream, "%s%s {nbytes=%lu", s1, s2, (unsigned long)(dt->shared->size));
 
-    if(H5T_IS_ATOMIC(dt->shared)) {
-        uint64_t	tmp;
+    if (H5T_IS_ATOMIC(dt->shared)) {
+        uint64_t    tmp;
 
-	switch(dt->shared->u.atomic.order) {
+        switch (dt->shared->u.atomic.order) {
             case H5T_ORDER_ERROR:
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "order error");
                 break;
@@ -279,17 +266,16 @@ H5T_debug(const H5T_t *dt, FILE *stream)
             default:
                 s1 = "order?";
                 break;
-	} /* end switch */
+        } /* end switch */
+
+        HDfprintf(stream, ", %s", s1);
 
-	fprintf(stream, ", %s", s1);
+        if (dt->shared->u.atomic.offset)
+            HDfprintf(stream, ", offset=%lu", (unsigned long) (dt->shared->u.atomic.offset));
+        if (dt->shared->u.atomic.prec != 8 * dt->shared->size)
+            HDfprintf(stream, ", prec=%lu", (unsigned long) (dt->shared->u.atomic.prec));
 
-	if(dt->shared->u.atomic.offset)
-	    fprintf(stream, ", offset=%lu",
-		    (unsigned long) (dt->shared->u.atomic.offset));
-	if(dt->shared->u.atomic.prec != 8 * dt->shared->size)
-	    fprintf(stream, ", prec=%lu",
-		    (unsigned long) (dt->shared->u.atomic.prec));
-	switch(dt->shared->type) {
+        switch (dt->shared->type) {
             case H5T_NO_CLASS:
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "no class");
                 break;
@@ -315,7 +301,7 @@ H5T_debug(const H5T_t *dt, FILE *stream)
 
                 } /* end switch */
                 if(s1)
-                    fprintf(stream, ", %s", s1);
+                    HDfprintf(stream, ", %s", s1);
                 break;
 
             case H5T_FLOAT:
@@ -341,23 +327,24 @@ H5T_debug(const H5T_t *dt, FILE *stream)
                         break;
                 } /* end switch */
 
-                fprintf(stream, ", sign=%lu+1",
+                HDfprintf(stream, ", sign=%lu+1",
                         (unsigned long)(dt->shared->u.atomic.u.f.sign));
-                fprintf(stream, ", mant=%lu+%lu (%s)",
+                HDfprintf(stream, ", mant=%lu+%lu (%s)",
                         (unsigned long)(dt->shared->u.atomic.u.f.mpos),
                         (unsigned long)(dt->shared->u.atomic.u.f.msize), s1);
-                fprintf(stream, ", exp=%lu+%lu",
+                HDfprintf(stream, ", exp=%lu+%lu",
                         (unsigned long)(dt->shared->u.atomic.u.f.epos),
                         (unsigned long)(dt->shared->u.atomic.u.f.esize));
                 tmp = dt->shared->u.atomic.u.f.ebias >> 32;
-                if(tmp) {
+                if (tmp) {
                     size_t hi = (size_t)tmp;
                     size_t lo = (size_t)(dt->shared->u.atomic.u.f.ebias & 0xffffffff);
-                    fprintf(stream, " bias=0x%08lx%08lx",
+                    HDfprintf(stream, " bias=0x%08lx%08lx",
                             (unsigned long)hi, (unsigned long)lo);
-                } else {
+                }
+                else {
                     size_t lo = (size_t)(dt->shared->u.atomic.u.f.ebias & 0xffffffff);
-                    fprintf(stream, " bias=0x%08lx", (unsigned long)lo);
+                    HDfprintf(stream, " bias=0x%08lx", (unsigned long)lo);
                 }
                 break;
 
@@ -374,69 +361,73 @@ H5T_debug(const H5T_t *dt, FILE *stream)
             default:
                 /* No additional info */
                 break;
-	} /* end switch */
-    } else if(H5T_COMPOUND == dt->shared->type) {
-	/* Compound data type */
-	for(i = 0; i < dt->shared->u.compnd.nmembs; i++) {
-	    fprintf(stream, "\n\"%s\" @%lu",
-		    dt->shared->u.compnd.memb[i].name,
-		    (unsigned long)(dt->shared->u.compnd.memb[i].offset));
-	    fprintf(stream, " ");
-	    H5T_debug(dt->shared->u.compnd.memb[i].type, stream);
-	} /* end for */
-	fprintf(stream, "\n");
-    } else if(H5T_VLEN == dt->shared->type) {
-        switch(dt->shared->u.vlen.loc) {
+        } /* end switch */
+    }
+    else if (H5T_COMPOUND == dt->shared->type) {
+        /* Compound data type */
+        for (i = 0; i < dt->shared->u.compnd.nmembs; i++) {
+            HDfprintf(stream, "\n\"%s\" @%lu",
+                    dt->shared->u.compnd.memb[i].name,
+                    (unsigned long)(dt->shared->u.compnd.memb[i].offset));
+            HDfprintf(stream, " ");
+            H5T_debug(dt->shared->u.compnd.memb[i].type, stream);
+        } /* end for */
+        HDfprintf(stream, "\n");
+    }
+    else if (H5T_VLEN == dt->shared->type) {
+        switch (dt->shared->u.vlen.loc) {
             case H5T_LOC_BADLOC:
                 HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "invalid datatype location");
                 break;
 
             case H5T_LOC_MEMORY:
-                fprintf(stream, ", loc=memory");
+                HDfprintf(stream, ", loc=memory");
                 break;
 
             case H5T_LOC_DISK:
-                fprintf(stream, ", loc=disk");
+                HDfprintf(stream, ", loc=disk");
                 break;
 
             case H5T_LOC_MAXLOC:
             default:
-                fprintf(stream, ", loc=UNKNOWN");
+                HDfprintf(stream, ", loc=UNKNOWN");
                 break;
         } /* end switch */
 
-        if(H5T_IS_VL_STRING(dt->shared))
+        if (H5T_IS_VL_STRING(dt->shared))
             /* Variable length string datatype */
-            fprintf(stream, ", variable-length");
+            HDfprintf(stream, ", variable-length");
         else {
             /* Variable length sequence datatype */
-            fprintf(stream, " VLEN ");
+            HDfprintf(stream, " VLEN ");
             H5T_debug(dt->shared->parent, stream);
-            fprintf(stream, "\n");
+            HDfprintf(stream, "\n");
         } /* end else */
-    } else if(H5T_ENUM == dt->shared->type) {
+    }
+    else if (H5T_ENUM == dt->shared->type) {
         size_t	base_size;
 
-	/* Enumeration data type */
-	fprintf(stream, " ");
-	H5T_debug(dt->shared->parent, stream);
-	base_size = dt->shared->parent->shared->size;
-	for(i = 0; i < dt->shared->u.enumer.nmembs; i++) {
+        /* Enumeration data type */
+        HDfprintf(stream, " ");
+        H5T_debug(dt->shared->parent, stream);
+        base_size = dt->shared->parent->shared->size;
+        for (i = 0; i < dt->shared->u.enumer.nmembs; i++) {
             size_t	k;
 
-	    fprintf(stream, "\n\"%s\" = 0x", dt->shared->u.enumer.name[i]);
-	    for(k = 0; k < base_size; k++)
-		fprintf(stream, "%02lx",
-			(unsigned long)(dt->shared->u.enumer.value + (i * base_size) + k));
-	} /* end for */
-	fprintf(stream, "\n");
-    } else if(H5T_OPAQUE == dt->shared->type) {
-	fprintf(stream, ", tag=\"%s\"", dt->shared->u.opaque.tag);
-    } else {
-	/* Unknown */
-	fprintf(stream, "unknown class %d\n", (int)(dt->shared->type));
+            HDfprintf(stream, "\n\"%s\" = 0x", dt->shared->u.enumer.name[i]);
+            for (k = 0; k < base_size; k++)
+                HDfprintf(stream, "%02lx", (unsigned long)(dt->shared->u.enumer.value + (i * base_size) + k));
+        } /* end for */
+        HDfprintf(stream, "\n");
+    }
+    else if (H5T_OPAQUE == dt->shared->type) {
+        HDfprintf(stream, ", tag=\"%s\"", dt->shared->u.opaque.tag);
+    }
+    else {
+        /* Unknown */
+        HDfprintf(stream, "unknown class %d\n", (int)(dt->shared->type));
     }
-    fprintf(stream, "}");
+    HDfprintf(stream, "}");
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Tdeprec.c b/src/H5Tdeprec.c
index a769b72..13d2f5f 100644
--- a/src/H5Tdeprec.c
+++ b/src/H5Tdeprec.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -39,6 +37,7 @@
 /***********/
 #include "H5private.h"		/* Generic Functions			*/
 #include "H5ACprivate.h"        /* Metadata cache                       */
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5FOprivate.h"	/* File objects				*/
 #include "H5Iprivate.h"		/* IDs					*/
@@ -116,9 +115,12 @@ H5Tcommit1(hid_t loc_id, const char *name, hid_t type_id)
     if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
 	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
+    /* Set up collective metadata if appropriate */
+    if(H5CX_set_loc(loc_id) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't set access property list info")
+
     /* Commit the datatype to the file, using default property list values */
-    if(H5T__commit_named(&loc, name, type, H5P_LINK_CREATE_DEFAULT,
-            H5P_DATATYPE_CREATE_DEFAULT, H5P_DATATYPE_ACCESS_DEFAULT, H5AC_ind_read_dxpl_id) < 0)
+    if(H5T__commit_named(&loc, name, type, H5P_LINK_CREATE_DEFAULT, H5P_DATATYPE_CREATE_DEFAULT) < 0)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "unable to commit datatype")
 
 done:
@@ -146,60 +148,31 @@ hid_t
 H5Topen1(hid_t loc_id, const char *name)
 {
     H5T_t       *type = NULL;
-    H5G_loc_t	 loc;
-    H5G_name_t   path;            	/* Datatype group hier. path */
-    H5O_loc_t    oloc;            	/* Datatype object location */
-    H5O_type_t   obj_type;              /* Type of object at location */
-    H5G_loc_t    type_loc;              /* Group object for datatype */
-    hbool_t      obj_found = FALSE;     /* Object at 'name' found */
-    hid_t        dxpl_id = H5AC_ind_read_dxpl_id; /* dxpl to use to open datatype */
-    hid_t        ret_value = FAIL;
+    H5G_loc_t	loc;
+    hid_t       ret_value = H5I_INVALID_HID;
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE2("i", "i*s", loc_id, name);
 
     /* Check args */
     if(H5G_loc(loc_id, &loc) < 0)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a location")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a location")
     if(!name || !*name)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no name")
-
-    /* Set up datatype location to fill in */
-    type_loc.oloc = &oloc;
-    type_loc.path = &path;
-    H5G_loc_reset(&type_loc);
-
-    /*
-     * Find the named datatype object header and read the datatype message
-     * from it.
-     */
-    if(H5G_loc_find(&loc, name, &type_loc/*out*/, H5P_DEFAULT, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "not found")
-    obj_found = TRUE;
-
-    /* Check that the object found is the correct type */
-    if(H5O_obj_type(&oloc, &obj_type, dxpl_id) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "can't get object type")
-    if(obj_type != H5O_TYPE_NAMED_DATATYPE)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_BADTYPE, FAIL, "not a named datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, H5I_INVALID_HID, "no name")
 
     /* Open it */
-    if((type = H5T_open(&type_loc, dxpl_id)) == NULL)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, FAIL, "unable to open named datatype")
+    if(NULL == (type = H5T__open_name(&loc, name)))
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, H5I_INVALID_HID, "unable to open named datatype")
 
     /* Register the type and return the ID */
     if((ret_value = H5I_register(H5I_DATATYPE, type, TRUE)) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register named datatype")
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register named datatype")
 
 done:
-    if(ret_value < 0) {
-        if(type != NULL)
-            H5T_close(type);
-        else {
-            if(obj_found && H5F_addr_defined(type_loc.oloc->addr))
-                H5G_loc_free(&type_loc);
-        } /* end else */
-    } /* end if */
+    /* Cleanup on error */
+    if(ret_value < 0)
+        if(type && H5T_close(type) < 0)
+            HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, H5I_INVALID_HID, "can't close datatype")
 
     FUNC_LEAVE_API(ret_value)
 } /* end H5Topen1() */
diff --git a/src/H5Tenum.c b/src/H5Tenum.c
index e80d748..ade7d08 100644
--- a/src/H5Tenum.c
+++ b/src/H5Tenum.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -59,23 +57,24 @@ H5Tenum_create(hid_t parent_id)
     H5T_t	*dt = NULL;		/*new enumeration data type	*/
     hid_t	ret_value;	        /*return value			*/
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE1("i", "i", parent_id);
 
     /* Check args */
     if(NULL == (parent = (H5T_t *)H5I_object_verify(parent_id, H5I_DATATYPE)) || H5T_INTEGER != parent->shared->type)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not an integer data type")
+	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not an integer data type")
 
     /* Build new type */
     if(NULL == (dt = H5T__enum_create(parent)))
-	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "cannot create enum type")
+	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5I_INVALID_HID, "cannot create enum type")
+
     /* Atomize the type */
     if ((ret_value=H5I_register(H5I_DATATYPE, dt, TRUE))<0)
-	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register data type atom")
+	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register data type atom")
 
 done:
     FUNC_LEAVE_API(ret_value)
-}
+} /* end H5Tenum_create() */
 
 
 /*-------------------------------------------------------------------------
@@ -448,7 +447,7 @@ H5T_enum_nameof(const H5T_t *dt, const void *value, char *name/*out*/, size_t si
 
 done:
     if(copied_dt)
-        if(H5T_close(copied_dt) < 0)
+        if(H5T_close_real(copied_dt) < 0)
             HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, NULL, "unable to close data type");
     if(!ret_value && alloc_name)
         H5MM_free(name);
@@ -576,7 +575,7 @@ H5T_enum_valueof(const H5T_t *dt, const char *name, void *value/*out*/)
 
 done:
     if(copied_dt)
-        if(H5T_close(copied_dt) < 0)
+        if(H5T_close_real(copied_dt) < 0)
             HDONE_ERROR(H5E_DATATYPE, H5E_CANTCLOSEOBJ, FAIL, "unable to close data type")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Tfields.c b/src/H5Tfields.c
index 8818a73..be62d85 100644
--- a/src/H5Tfields.c
+++ b/src/H5Tfields.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tfixed.c b/src/H5Tfixed.c
index 62b8e79..bc1d84d 100644
--- a/src/H5Tfixed.c
+++ b/src/H5Tfixed.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tfloat.c b/src/H5Tfloat.c
index b8b1c07..85e8f30 100644
--- a/src/H5Tfloat.c
+++ b/src/H5Tfloat.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tmodule.h b/src/H5Tmodule.h
index bfaab5e6..d2ab08c 100644
--- a/src/H5Tmodule.h
+++ b/src/H5Tmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tnative.c b/src/H5Tnative.c
index 9dbce09..c9ad01a 100644
--- a/src/H5Tnative.c
+++ b/src/H5Tnative.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -22,6 +20,7 @@
 
 
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5Iprivate.h"		/* IDs			  		*/
 #include "H5Pprivate.h"		/* Property lists			*/
@@ -29,16 +28,17 @@
 #include "H5Tpkg.h"		/* Datatypes				*/
 
 /* Static local functions */
-static H5T_t *H5T_get_native_type(H5T_t *dt, H5T_direction_t direction,
-                                  size_t *struct_align, size_t *offset, size_t *comp_size);
-static H5T_t *H5T_get_native_integer(size_t prec, H5T_sign_t sign, H5T_direction_t direction,
-                                     size_t *struct_align, size_t *offset, size_t *comp_size);
-static H5T_t *H5T_get_native_float(size_t size, H5T_direction_t direction,
-                                   size_t *struct_align, size_t *offset, size_t *comp_size);
-static H5T_t* H5T_get_native_bitfield(size_t prec, H5T_direction_t direction,
-                                   size_t *struct_align, size_t *offset, size_t *comp_size);
-static herr_t H5T_cmp_offset(size_t *comp_size, size_t *offset, size_t elem_size,
-                         size_t nelems, size_t align, size_t *struct_align);
+static H5T_t *H5T__get_native_type(H5T_t *dt, H5T_direction_t direction,
+    size_t *struct_align, size_t *offset, size_t *comp_size);
+static H5T_t *H5T__get_native_integer(size_t prec, H5T_sign_t sign,
+    H5T_direction_t direction, size_t *struct_align, size_t *offset,
+    size_t *comp_size);
+static H5T_t *H5T__get_native_float(size_t size, H5T_direction_t direction,
+    size_t *struct_align, size_t *offset, size_t *comp_size);
+static H5T_t* H5T__get_native_bitfield(size_t prec, H5T_direction_t direction,
+    size_t *struct_align, size_t *offset, size_t *comp_size);
+static herr_t H5T__cmp_offset(size_t *comp_size, size_t *offset, size_t elem_size,
+    size_t nelems, size_t align, size_t *struct_align);
 
 
 
@@ -76,41 +76,40 @@ hid_t
 H5Tget_native_type(hid_t type_id, H5T_direction_t direction)
 {
     H5T_t       *dt;                /* Datatype to create native datatype from */
-    H5T_t       *new_dt=NULL;       /* Datatype for native datatype created */
-    size_t      comp_size=0;        /* Compound datatype's size */
+    H5T_t       *new_dt = NULL;     /* Datatype for native datatype created */
+    size_t      comp_size = 0;      /* Compound datatype's size */
     hid_t       ret_value;          /* Return value */
 
-    FUNC_ENTER_API(FAIL)
+    FUNC_ENTER_API(H5I_INVALID_HID)
     H5TRACE2("i", "iTd", type_id, direction);
 
-    /* check argument */
-    if(NULL==(dt=(H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a data type")
+    /* Check arguments */
+    if(NULL == (dt = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not a data type")
+    if(direction != H5T_DIR_DEFAULT && direction != H5T_DIR_ASCEND
+            && direction != H5T_DIR_DESCEND)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "not valid direction value")
 
-    if(direction!=H5T_DIR_DEFAULT && direction!=H5T_DIR_ASCEND
-            && direction!=H5T_DIR_DESCEND)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not valid direction value")
+    /* Get the native type */
+    if(NULL == (new_dt = H5T__get_native_type(dt, direction, NULL, NULL, &comp_size)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, H5I_INVALID_HID, "cannot retrieve native type")
 
-    if((new_dt = H5T_get_native_type(dt, direction, NULL, NULL, &comp_size))==NULL)
-        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "cannot retrieve native type")
-
-    if((ret_value=H5I_register(H5I_DATATYPE, new_dt, TRUE)) < 0)
-        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, FAIL, "unable to register data type")
+    /* Get an ID for the new type */
+    if((ret_value = H5I_register(H5I_DATATYPE, new_dt, TRUE)) < 0)
+        HGOTO_ERROR(H5E_DATATYPE, H5E_CANTREGISTER, H5I_INVALID_HID, "unable to register data type")
 
 done:
     /* Error cleanup */
-    if(ret_value<0) {
-        if(new_dt)
-            if(H5T_close(new_dt)<0)
-                HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, FAIL, "unable to release datatype")
-    } /* end if */
+    if(ret_value < 0)
+        if(new_dt && H5T_close_real(new_dt) < 0)
+            HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, H5I_INVALID_HID, "unable to release datatype")
 
     FUNC_LEAVE_API(ret_value)
-}
+} /* end H5Tget_native_type() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5T_get_native_type
+ * Function:    H5T__get_native_type
  *
  * Purpose:     Returns the native type of a datatype.
  *
@@ -124,7 +123,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5T_t *
-H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_align, size_t *offset, size_t *comp_size)
+H5T__get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_align,
+    size_t *offset, size_t *comp_size)
 {
     H5T_t       *dt;                /* Datatype to make native */
     H5T_t       *super_type;        /* Super type of VL, array and enum datatypes */
@@ -146,7 +146,7 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
     unsigned    u;                  /* Local index variable */
     H5T_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI(NULL)
+    FUNC_ENTER_STATIC
 
     HDassert(dtype);
 
@@ -166,13 +166,13 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
 
                 prec =  dtype->shared->u.atomic.prec;
 
-                if(NULL == (ret_value = H5T_get_native_integer(prec, sign, direction, struct_align, offset, comp_size)))
+                if(NULL == (ret_value = H5T__get_native_integer(prec, sign, direction, struct_align, offset, comp_size)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot retrieve integer type")
             } /* end case */
             break;
 
         case H5T_FLOAT:
-            if(NULL == (ret_value = H5T_get_native_float(size, direction, struct_align, offset, comp_size)))
+            if(NULL == (ret_value = H5T__get_native_float(size, direction, struct_align, offset, comp_size)))
                 HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot retrieve float type")
 
             break;
@@ -183,12 +183,12 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
 
             if(H5T_IS_VL_STRING(dtype->shared)) {
                 /* Update size, offset and compound alignment for parent. */
-                if(H5T_cmp_offset(comp_size, offset, sizeof(char *), (size_t)1, H5T_POINTER_COMP_ALIGN_g, struct_align) < 0)
+                if(H5T__cmp_offset(comp_size, offset, sizeof(char *), (size_t)1, H5T_POINTER_COMP_ALIGN_g, struct_align) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
             } /* end if */
             else {
                 /* Update size, offset and compound alignment for parent. */
-                if(H5T_cmp_offset(comp_size, offset, sizeof(char), size, H5T_NATIVE_SCHAR_COMP_ALIGN_g, struct_align) < 0)
+                if(H5T__cmp_offset(comp_size, offset, sizeof(char), size, H5T_NATIVE_SCHAR_COMP_ALIGN_g, struct_align) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
             } /* end else */
             break;
@@ -202,7 +202,7 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
             {
                 prec =  dtype->shared->u.atomic.prec;
 
-                if(NULL == (ret_value = H5T_get_native_bitfield(prec, direction, struct_align, offset, comp_size)))
+                if(NULL == (ret_value = H5T__get_native_bitfield(prec, direction, struct_align, offset, comp_size)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot retrieve integer for bitfield type")
             } /* end case */
             break;
@@ -212,7 +212,7 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                  HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot retrieve float type")
 
             /* Update size, offset and compound alignment for parent. */
-            if(H5T_cmp_offset(comp_size, offset, sizeof(char), size, H5T_NATIVE_SCHAR_COMP_ALIGN_g, struct_align) < 0)
+            if(H5T__cmp_offset(comp_size, offset, sizeof(char), size, H5T_NATIVE_SCHAR_COMP_ALIGN_g, struct_align) < 0)
                 HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
             break;
 
@@ -240,7 +240,7 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                     ref_size = sizeof(hdset_reg_ref_t);
                 } /* end else */
 
-                if(H5T_cmp_offset(comp_size, offset, ref_size, (size_t)1, align, struct_align) < 0)
+                if(H5T__cmp_offset(comp_size, offset, ref_size, (size_t)1, align, struct_align) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
             } /* end case */
             break;
@@ -269,10 +269,10 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                     if(NULL == (comp_mname[u] = H5T__get_member_name(dtype, u)))
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "member type retrieval failed")
 
-                    if(NULL == (memb_list[u] = H5T_get_native_type(memb_type, direction, &children_st_align, &(memb_offset[u]), &children_size)))
+                    if(NULL == (memb_list[u] = H5T__get_native_type(memb_type, direction, &children_st_align, &(memb_offset[u]), &children_size)))
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "member identifier retrieval failed")
 
-                    if(H5T_close(memb_type) < 0)
+                    if(H5T_close_real(memb_type) < 0)
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot close datatype")
                 } /* end for */
 
@@ -307,13 +307,12 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                  * The alignment for ST in S1 is the biggest structure alignment of all the
                  * members of S2, which is probably the LL2 of 'long long'. -SLU 2010/4/28
                  */
-                if(H5T_cmp_offset(comp_size, offset, children_size, (size_t)1, children_st_align,
-                                  struct_align) < 0)
+                if(H5T__cmp_offset(comp_size, offset, children_size, (size_t)1, children_st_align, struct_align) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
 
                 /* Close member data type */
                 for(u = 0; u < nmemb; u++) {
-                    if(H5T_close(memb_list[u]) < 0)
+                    if(H5T_close_real(memb_list[u]) < 0)
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot close datatype")
 
                     /* Free member names in list */
@@ -339,7 +338,7 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                 /* Retrieve base type for enumerated type */
                 if(NULL == (super_type = H5T_get_super(dtype)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "unable to get base type for enumerate type")
-                if(NULL == (nat_super_type = H5T_get_native_type(super_type, direction, struct_align, offset, comp_size)))
+                if(NULL == (nat_super_type = H5T__get_native_type(super_type, direction, struct_align, offset, comp_size)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "base native type retrieval failed")
 
                 if((super_type_id = H5I_register(H5I_DATATYPE, super_type, FALSE)) < 0)
@@ -358,7 +357,7 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "unable to create enum type")
 
                 /* Find the conversion function */
-                if(NULL == (tpath = H5T_path_find(super_type, nat_super_type, NULL, NULL, H5AC_noio_dxpl_id, FALSE)))
+                if(NULL == (tpath = H5T_path_find(super_type, nat_super_type)))
                     HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to convert between src and dst data types")
 
                 /* Retrieve member info and insert members into new enum type */
@@ -372,7 +371,7 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot get member value")
                     HDmemcpy(memb_value, tmp_memb_value, H5T_get_size(super_type));
 
-                    if(H5T_convert(tpath, super_type_id, nat_super_type_id, (size_t)1, (size_t)0, (size_t)0, memb_value, NULL, H5AC_noio_dxpl_id) < 0)
+                    if(H5T_convert(tpath, super_type_id, nat_super_type_id, (size_t)1, (size_t)0, (size_t)0, memb_value, NULL) < 0)
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot get member value")
 
                     if(H5T__enum_insert(new_type, memb_name, memb_value) < 0)
@@ -414,12 +413,12 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                 /* Retrieve base type for array type */
                 if(NULL == (super_type = H5T_get_super(dtype)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "unable to get parent type for array type")
-                if(NULL == (nat_super_type = H5T_get_native_type(super_type, direction, &super_align,
+                if(NULL == (nat_super_type = H5T__get_native_type(super_type, direction, &super_align,
                                                          &super_offset, &super_size)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "parent native type retrieval failed")
 
                 /* Close super type */
-                if(H5T_close(super_type) < 0)
+                if(H5T_close_real(super_type) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_CLOSEERROR, NULL, "cannot close datatype")
 
                 /* Create a new array type based on native type */
@@ -427,13 +426,13 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "unable to create array type")
 
                 /* Close base type */
-                if(H5T_close(nat_super_type) < 0)
+                if(H5T_close_real(nat_super_type) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_CLOSEERROR, NULL, "cannot close datatype")
 
                 for(u = 0; u < array_rank; u++)
                     nelems *= dims[u];
                 H5_CHECK_OVERFLOW(nelems, hsize_t, size_t);
-                if(H5T_cmp_offset(comp_size, offset, super_size, (size_t)nelems, super_align, struct_align) < 0)
+                if(H5T__cmp_offset(comp_size, offset, super_size, (size_t)nelems, super_align, struct_align) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
 
                 dims = (hsize_t *)H5MM_xfree(dims);
@@ -453,11 +452,11 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "unable to get parent type for VL type")
                 /* Don't need alignment, offset information if this VL isn't a field of compound type.  If it
                  * is, go to a few steps below to compute the information directly. */
-                if(NULL == (nat_super_type = H5T_get_native_type(super_type, direction, NULL, NULL, &super_size)))
+                if(NULL == (nat_super_type = H5T__get_native_type(super_type, direction, NULL, NULL, &super_size)))
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "parent native type retrieval failed")
 
                 /* Close super type */
-                if(H5T_close(super_type) < 0)
+                if(H5T_close_real(super_type) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_CLOSEERROR, NULL, "cannot close datatype")
 
                 /* Create a new array type based on native type */
@@ -465,14 +464,14 @@ H5T_get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_alig
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "unable to create VL type")
 
                 /* Close base type */
-                if(H5T_close(nat_super_type) < 0)
+                if(H5T_close_real(nat_super_type) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_CLOSEERROR, NULL, "cannot close datatype")
 
                 /* Update size, offset and compound alignment for parent compound type directly. */
                 vl_align = H5T_HVL_COMP_ALIGN_g;
                 vl_size  = sizeof(hvl_t);
 
-                if(H5T_cmp_offset(comp_size, offset, vl_size, (size_t)1, vl_align, struct_align) < 0)
+                if(H5T__cmp_offset(comp_size, offset, vl_size, (size_t)1, vl_align, struct_align) < 0)
                     HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
 
                 ret_value = new_type;
@@ -489,13 +488,13 @@ done:
     /* Error cleanup */
     if(NULL == ret_value) {
         if(new_type)
-            if(H5T_close(new_type) < 0)
+            if(H5T_close_real(new_type) < 0)
                 HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, NULL, "unable to release datatype")
 
         /* Free lists for members */
         if(memb_list) {
             for(u = 0; u < nmemb; u++)
-                if(memb_list[u] && H5T_close(memb_list[u]) < 0)
+                if(memb_list[u] && H5T_close_real(memb_list[u]) < 0)
                     HDONE_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot close datatype")
 
             memb_list = (H5T_t **)H5MM_xfree(memb_list);
@@ -514,11 +513,11 @@ done:
     } /* end if */
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5T_get_native_type() */
+} /* end H5T__get_native_type() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5T_get_native_integer
+ * Function:    H5T__get_native_integer
  *
  * Purpose:     Returns the native integer type of a datatype.
  *
@@ -532,8 +531,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5T_t *
-H5T_get_native_integer(size_t prec, H5T_sign_t sign, H5T_direction_t direction,
-                       size_t *struct_align, size_t *offset, size_t *comp_size)
+H5T__get_native_integer(size_t prec, H5T_sign_t sign, H5T_direction_t direction,
+    size_t *struct_align, size_t *offset, size_t *comp_size)
 {
     H5T_t       *dt;            /* Appropriate native datatype to copy */
     hid_t       tid = (-1);     /* Datatype ID of appropriate native datatype */
@@ -549,7 +548,7 @@ H5T_get_native_integer(size_t prec, H5T_sign_t sign, H5T_direction_t direction,
     } match = H5T_NATIVE_INT_MATCH_UNKNOWN;
     H5T_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI(NULL)
+    FUNC_ENTER_STATIC
 
     if(direction == H5T_DIR_DEFAULT || direction == H5T_DIR_ASCEND) {
         if(prec <= H5T_get_precision((H5T_t *)H5I_object(H5T_NATIVE_SCHAR_g))) {
@@ -650,16 +649,16 @@ H5T_get_native_integer(size_t prec, H5T_sign_t sign, H5T_direction_t direction,
          HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot copy type")
 
     /* compute size and offset of compound type member. */
-    if(H5T_cmp_offset(comp_size, offset, native_size, (size_t)1, align, struct_align) < 0)
+    if(H5T__cmp_offset(comp_size, offset, native_size, (size_t)1, align, struct_align) < 0)
          HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5T_get_native_integer() */
+} /* end H5T__get_native_integer() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5T_get_native_float
+ * Function:    H5T__get_native_float
  *
  * Purpose:     Returns the native floatt type of a datatype.
  *
@@ -673,7 +672,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5T_t*
-H5T_get_native_float(size_t size, H5T_direction_t direction, size_t *struct_align, size_t *offset, size_t *comp_size)
+H5T__get_native_float(size_t size, H5T_direction_t direction, size_t *struct_align,
+    size_t *offset, size_t *comp_size)
 {
     H5T_t       *dt=NULL;       /* Appropriate native datatype to copy */
     hid_t       tid=(-1);       /* Datatype ID of appropriate native datatype */
@@ -689,7 +689,7 @@ H5T_get_native_float(size_t size, H5T_direction_t direction, size_t *struct_alig
     } match=H5T_NATIVE_FLOAT_MATCH_UNKNOWN;
     H5T_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI(NULL)
+    FUNC_ENTER_STATIC
 
     HDassert(size>0);
 
@@ -774,16 +774,16 @@ H5T_get_native_float(size_t size, H5T_direction_t direction, size_t *struct_alig
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot retrieve float type")
 
     /* compute offset of compound type member. */
-    if(H5T_cmp_offset(comp_size, offset, native_size, (size_t)1, align, struct_align)<0)
+    if(H5T__cmp_offset(comp_size, offset, native_size, (size_t)1, align, struct_align)<0)
          HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5T__get_native_float() */
 
 
 /*-------------------------------------------------------------------------
- * Function:    H5T_get_native_bitfield
+ * Function:    H5T__get_native_bitfield
  *
  * Purpose:     Returns the native bitfield type of a datatype.  Bitfield
  *              is similar to unsigned integer.
@@ -798,8 +798,8 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5T_t*
-H5T_get_native_bitfield(size_t prec, H5T_direction_t direction, size_t *struct_align,
-                        size_t *offset, size_t *comp_size)
+H5T__get_native_bitfield(size_t prec, H5T_direction_t direction,
+    size_t *struct_align, size_t *offset, size_t *comp_size)
 {
     H5T_t       *dt;            /* Appropriate native datatype to copy */
     hid_t       tid=(-1);       /* Datatype ID of appropriate native datatype */
@@ -807,7 +807,7 @@ H5T_get_native_bitfield(size_t prec, H5T_direction_t direction, size_t *struct_a
     size_t      native_size=0;  /* Datatype size of the native type */
     H5T_t       *ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI(NULL)
+    FUNC_ENTER_STATIC
 
     if(direction == H5T_DIR_DEFAULT || direction == H5T_DIR_ASCEND) {
         if(prec<=H5T_get_precision((H5T_t *)H5I_object(H5T_NATIVE_B8_g))) {
@@ -860,16 +860,16 @@ H5T_get_native_bitfield(size_t prec, H5T_direction_t direction, size_t *struct_a
          HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot copy type")
 
     /* compute size and offset of compound type member. */
-    if(H5T_cmp_offset(comp_size, offset, native_size, (size_t)1, align, struct_align)<0)
+    if(H5T__cmp_offset(comp_size, offset, native_size, (size_t)1, align, struct_align)<0)
          HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot compute compound offset")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-}
+} /* end H5T__get_native_bitfield() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5T_cmp_offset
+ * Function:	H5T__cmp_offset
  *
  * Purpose:	This function is only for convenience.  It computes the
  *              compound type size, offset of the member being considered
@@ -885,29 +885,27 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_cmp_offset(size_t *comp_size, size_t *offset, size_t elem_size,
-                      size_t nelems, size_t align, size_t *struct_align)
+H5T__cmp_offset(size_t *comp_size, size_t *offset, size_t elem_size,
+    size_t nelems, size_t align, size_t *struct_align)
 {
-    herr_t ret_value = SUCCEED;
-
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_STATIC_NOERR
 
     if(offset && comp_size) {
-        if(align>1 && *comp_size%align) {
+        if(align > 1 && *comp_size % align) {
             /* Add alignment value */
-            *offset = *comp_size +  (align - *comp_size%align);
-            *comp_size += (align - *comp_size%align);
-        } else
+            *offset = *comp_size +  (align - *comp_size % align);
+            *comp_size += (align - *comp_size % align);
+        } /* end if */
+        else
             *offset = *comp_size;
 
         /* compute size of compound type member. */
-        *comp_size += nelems*elem_size;
-    }
+        *comp_size += nelems* elem_size;
+    } /* end if */
 
     if(struct_align && *struct_align < align)
         *struct_align = align;
 
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}
+    FUNC_LEAVE_NOAPI(SUCCEED)
+} /* end H5T__cmp_offset() */
 
diff --git a/src/H5Toffset.c b/src/H5Toffset.c
index cc45d8e..668e730 100644
--- a/src/H5Toffset.c
+++ b/src/H5Toffset.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Toh.c b/src/H5Toh.c
index 9c8ad80..c0139fe 100644
--- a/src/H5Toh.c
+++ b/src/H5Toh.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /****************/
@@ -45,12 +43,10 @@
 /* Local Prototypes */
 /********************/
 
-static htri_t H5O_dtype_isa(H5O_t *loc);
-static hid_t H5O_dtype_open(const H5G_loc_t *obj_loc, hid_t lapl_id,
-    hid_t dxpl_id, hbool_t app_ref);
-static void *H5O_dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc,
-    hid_t dxpl_id);
-static H5O_loc_t *H5O_dtype_get_oloc(hid_t obj_id);
+static htri_t H5O__dtype_isa(const H5O_t *loc);
+static hid_t H5O__dtype_open(const H5G_loc_t *obj_loc, hbool_t app_ref);
+static void *H5O__dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc);
+static H5O_loc_t *H5O__dtype_get_oloc(hid_t obj_id);
 
 
 /*********************/
@@ -73,17 +69,17 @@ const H5O_obj_class_t H5O_OBJ_DATATYPE[1] = {{
     "named datatype",		/* object name, for debugging	*/
     NULL,			/* get 'copy file' user data	*/
     NULL,			/* free 'copy file' user data	*/
-    H5O_dtype_isa, 		/* "isa" 			*/
-    H5O_dtype_open, 		/* open an object of this class */
-    H5O_dtype_create, 		/* create an object of this class */
-    H5O_dtype_get_oloc,		/* get an object header location for an object */
+    H5O__dtype_isa, 		/* "isa" 			*/
+    H5O__dtype_open, 		/* open an object of this class */
+    H5O__dtype_create, 		/* create an object of this class */
+    H5O__dtype_get_oloc,	/* get an object header location for an object */
     NULL,			/* get the index & heap info for an object */
     NULL 			/* flush an opened object of this class */
 }};
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_dtype_isa
+ * Function:	H5O__dtype_isa
  *
  * Purpose:	Determines if an object has the requisite messages for being
  *		a datatype.
@@ -100,11 +96,11 @@ const H5O_obj_class_t H5O_OBJ_DATATYPE[1] = {{
  *-------------------------------------------------------------------------
  */
 static htri_t
-H5O_dtype_isa(struct H5O_t *oh)
+H5O__dtype_isa(const H5O_t *oh)
 {
     htri_t	ret_value = FAIL;       /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(oh);
 
@@ -113,11 +109,11 @@ H5O_dtype_isa(struct H5O_t *oh)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dtype_isa() */
+} /* end H5O__dtype_isa() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_dtype_open
+ * Function:	H5O__dtype_open
  *
  * Purpose:	Open a datatype at a particular location
  *
@@ -130,17 +126,17 @@ done:
  *-------------------------------------------------------------------------
  */
 static hid_t
-H5O_dtype_open(const H5G_loc_t *obj_loc, hid_t H5_ATTR_UNUSED lapl_id, hid_t dxpl_id, hbool_t app_ref)
+H5O__dtype_open(const H5G_loc_t *obj_loc, hbool_t app_ref)
 {
     H5T_t       *type = NULL;           /* Datatype opened */
     hid_t	ret_value = H5I_INVALID_HID;    /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     HDassert(obj_loc);
 
     /* Open the datatype */
-    if(NULL == (type = H5T_open(obj_loc, dxpl_id)))
+    if(NULL == (type = H5T_open(obj_loc)))
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTOPENOBJ, FAIL, "unable to open datatype")
 
     /* Register an ID for the datatype */
@@ -153,11 +149,11 @@ done:
             HDONE_ERROR(H5E_DATATYPE, H5E_CLOSEERROR, FAIL, "unable to release datatype")
 
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dtype_open() */
+} /* end H5O__dtype_open() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_dtype_create
+ * Function:	H5O__dtype_create
  *
  * Purpose:	Create a named datatype in a file
  *
@@ -170,12 +166,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id)
+H5O__dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc)
 {
     H5T_obj_create_t *crt_info = (H5T_obj_create_t *)_crt_info; /* Named datatype creation parameters */
     void *ret_value = NULL;     /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Sanity checks */
     HDassert(f);
@@ -183,7 +179,7 @@ H5O_dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id)
     HDassert(obj_loc);
 
     /* Commit the type to the file */
-    if(H5T__commit(f, crt_info->dt, crt_info->tcpl_id, dxpl_id) < 0)
+    if(H5T__commit(f, crt_info->dt, crt_info->tcpl_id) < 0)
 	HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "unable to commit datatype")
 
     /* Set up the new named datatype's location */
@@ -197,11 +193,11 @@ H5O_dtype_create(H5F_t *f, void *_crt_info, H5G_loc_t *obj_loc, hid_t dxpl_id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dtype_create() */
+} /* end H5O__dtype_create() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5O_dtype_get_oloc
+ * Function:	H5O__dtype_get_oloc
  *
  * Purpose:	Retrieve the object header location for an open object
  *
@@ -214,12 +210,12 @@ done:
  *-------------------------------------------------------------------------
  */
 static H5O_loc_t *
-H5O_dtype_get_oloc(hid_t obj_id)
+H5O__dtype_get_oloc(hid_t obj_id)
 {
     H5T_t       *type;                  /* Datatype opened */
     H5O_loc_t	*ret_value = NULL;      /* Return value */
 
-    FUNC_ENTER_NOAPI_NOINIT
+    FUNC_ENTER_STATIC
 
     /* Get the datatype */
     if(NULL == (type = (H5T_t *)H5I_object(obj_id)))
@@ -231,5 +227,5 @@ H5O_dtype_get_oloc(hid_t obj_id)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5O_dtype_get_oloc() */
+} /* end H5O__dtype_get_oloc() */
 
diff --git a/src/H5Topaque.c b/src/H5Topaque.c
index 9cc22c9..4e8f1d4 100644
--- a/src/H5Topaque.c
+++ b/src/H5Topaque.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Torder.c b/src/H5Torder.c
index 6c9c55c..877316d 100644
--- a/src/H5Torder.c
+++ b/src/H5Torder.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tpad.c b/src/H5Tpad.c
index e636a84..c96f42a 100644
--- a/src/H5Tpad.c
+++ b/src/H5Tpad.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tpkg.h b/src/H5Tpkg.h
index 49b0ea0..96132b0 100644
--- a/src/H5Tpkg.h
+++ b/src/H5Tpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -151,12 +149,25 @@ struct H5T_stats_t {
     H5_timer_t	timer;			/*total time for conversion	     */
 };
 
+/* Library internal datatype conversion functions are... */
+typedef herr_t (*H5T_lib_conv_t) (hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
+      size_t nelmts, size_t buf_stride, size_t bkg_stride, void *buf, void *bkg);
+
+/* Conversion callbacks (library internal ones don't need DXPL) */
+typedef struct H5T_conv_func_t {
+    hbool_t is_app;                 /* Whether conversion function is registered from application */
+    union {
+        H5T_conv_t app_func;        /* Application data conversion function */
+        H5T_lib_conv_t lib_func;    /* Library internal data conversion function */
+    } u;
+} H5T_conv_func_t;
+
 /* The datatype conversion database */
 struct H5T_path_t {
     char	name[H5T_NAMELEN];	/*name for debugging only	     */
     H5T_t	*src;			/*source datatype 		     */
     H5T_t	*dst;			/*destination datatype		     */
-    H5T_conv_t	func;			/*data conversion function	     */
+    H5T_conv_func_t conv;               /* Conversion funcion                */
     hbool_t	is_hard;		/*is it a hard function?	     */
     hbool_t	is_noop;		/*is it the noop conversion?	     */
     hbool_t	are_compounds;		/*are source and dest both compounds?*/
@@ -236,9 +247,9 @@ typedef struct H5T_enum_t {
 typedef ssize_t (*H5T_vlen_getlenfunc_t)(const void *vl_addr);
 typedef void * (*H5T_vlen_getptrfunc_t)(void *vl_addr);
 typedef htri_t (*H5T_vlen_isnullfunc_t)(const H5F_t *f, void *vl_addr);
-typedef herr_t (*H5T_vlen_readfunc_t)(H5F_t *f, hid_t dxpl_id, void *_vl, void *buf, size_t len);
-typedef herr_t (*H5T_vlen_writefunc_t)(H5F_t *f, hid_t dxpl_id, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *buf, void *_bg, size_t seq_len, size_t base_size);
-typedef herr_t (*H5T_vlen_setnullfunc_t)(H5F_t *f, hid_t dxpl_id, void *_vl, void *_bg);
+typedef herr_t (*H5T_vlen_readfunc_t)(H5F_t *f, void *_vl, void *buf, size_t len);
+typedef herr_t (*H5T_vlen_writefunc_t)(H5F_t *f, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *buf, void *_bg, size_t seq_len, size_t base_size);
+typedef herr_t (*H5T_vlen_setnullfunc_t)(H5F_t *f, void *_vl, void *_bg);
 
 /* VL types */
 typedef enum {
@@ -316,7 +327,7 @@ typedef struct H5T_soft_t {
     char	name[H5T_NAMELEN];	/*name for debugging only	     */
     H5T_class_t src;			/*source datatype class	     */
     H5T_class_t dst;			/*destination datatype class	     */
-    H5T_conv_t	func;			/*the conversion function	     */
+    H5T_conv_func_t conv;		/*the conversion function	     */
 } H5T_soft_t;
 
 /* Bit search direction */
@@ -334,6 +345,9 @@ typedef struct {
 /* Typedef for datatype iteration operations */
 typedef herr_t (*H5T_operator_t)(H5T_t *dt, void *op_data/*in,out*/);
 
+/*  Array of versions for Datatype */
+H5_DLLVAR const unsigned H5O_dtype_ver_bounds[H5F_LIBVER_NBOUNDS];
+
 /*
  * Alignment information for native types. A value of N indicates that the
  * data must be aligned on an address ADDR such that 0 == ADDR mod N. When
@@ -426,856 +440,687 @@ H5FL_EXTERN(H5T_shared_t);
 /* Common functions */
 H5_DLL herr_t H5T__init_native(void);
 H5_DLL H5T_t *H5T__create(H5T_class_t type, size_t size);
-H5_DLL herr_t H5T__commit(H5F_t *file, H5T_t *type, hid_t tcpl_id, hid_t dxpl_id);
-H5_DLL herr_t H5T__commit_named(const H5G_loc_t *loc, const char *name,
-    H5T_t *dt, hid_t lcpl_id, hid_t tcpl_id, hid_t tapl_id, hid_t dxpl_id);
 H5_DLL H5T_t *H5T__alloc(void);
 H5_DLL herr_t H5T__free(H5T_t *dt);
 H5_DLL herr_t H5T__visit(H5T_t *dt, unsigned visit_flags, H5T_operator_t op,
     void *op_value);
 H5_DLL herr_t H5T__upgrade_version(H5T_t *dt, unsigned new_version);
 
+/* Committed / named datatype routines */
+H5_DLL herr_t H5T__commit(H5F_t *file, H5T_t *type, hid_t tcpl_id);
+H5_DLL herr_t H5T__commit_named(const H5G_loc_t *loc, const char *name,
+    H5T_t *dt, hid_t lcpl_id, hid_t tcpl_id);
+H5_DLL H5T_t *H5T__open_name(const H5G_loc_t *loc, const char *name);
+
 /* Conversion functions */
 H5_DLL herr_t H5T__conv_noop(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
-			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+    size_t nelmts, size_t buf_stride, size_t bkg_stride, void *buf, void *bkg);
 
 H5_DLL herr_t H5T__conv_order(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_order_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_struct(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_struct_opt(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_enum(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_enum_numeric(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_vlen(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_array(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_i_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_f_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_i_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_s_s(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 H5_DLL herr_t H5T__conv_b_b(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
 			    size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *_buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *_buf, void *bkg);
 
 H5_DLL herr_t H5T__conv_schar_uchar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_schar(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_short(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_ushort(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata,
                             size_t nelmts, size_t buf_stride,
-                            size_t bkg_stride, void *buf, void *bkg,
-                            hid_t dset_xfer_plist);
+                            size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_int(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_uint(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_int(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_uint(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_long(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_ulong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_long(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_ulong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_llong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_llong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 
 H5_DLL herr_t H5T__conv_short_schar(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_uchar(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_schar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_uchar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_ushort(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_short(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_int(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_uint(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_int(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_uint(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_long(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_ulong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_long(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_ulong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_llong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_llong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_ullong(hid_t src_id, hid_t dst_id,
 				      H5T_cdata_t *cdata, size_t nelmts,
 				      size_t buf_stride, size_t bkg_stride,
-                                      void *buf, void *bkg,
-                                      hid_t dset_xfer_plist);
+                                      void *buf, void *bkg);
 
 H5_DLL herr_t H5T__conv_int_schar(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_uchar(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_schar(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_uchar(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_short(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_ushort(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_short(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_ushort(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_uint(hid_t src_id, hid_t dst_id,
 				 H5T_cdata_t *cdata, size_t nelmts,
 				 size_t buf_stride, size_t bkg_stride,
-                                 void *buf, void *bkg,
-                                 hid_t dset_xfer_plist);
+                                 void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_int(hid_t src_id, hid_t dst_id,
 				 H5T_cdata_t *cdata, size_t nelmts,
 				 size_t buf_stride, size_t bkg_stride,
-                                 void *buf, void *bkg,
-                                 hid_t dset_xfer_plist);
+                                 void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_long(hid_t src_id, hid_t dst_id,
 				 H5T_cdata_t *cdata, size_t nelmts,
 				 size_t buf_stride, size_t bkg_stride,
-                                 void *buf, void *bkg,
-                                 hid_t dset_xfer_plist);
+                                 void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_ulong(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_long(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_ulong(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_llong(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_ullong(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_llong(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_ullong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 
 H5_DLL herr_t H5T__conv_long_schar(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_uchar(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_schar(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_uchar(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_short(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_ushort(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_short(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_ushort(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_int(hid_t src_id, hid_t dst_id,
 				 H5T_cdata_t *cdata, size_t nelmts,
 				 size_t buf_stride, size_t bkg_stride,
-                                 void *buf, void *bkg,
-                                 hid_t dset_xfer_plist);
+                                 void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_uint(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_int(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_uint(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_ulong(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_long(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_llong(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_ullong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_llong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 
 H5_DLL herr_t H5T__conv_llong_schar(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_uchar(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_schar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_uchar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_short(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_ushort(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_short(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_ushort(hid_t src_id, hid_t dst_id,
 				      H5T_cdata_t *cdata, size_t nelmts,
 				      size_t buf_stride, size_t bkg_stride,
-                                      void *buf, void *bkg,
-                                      hid_t dset_xfer_plist);
+                                      void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_int(hid_t src_id, hid_t dst_id,
 				  H5T_cdata_t *cdata, size_t nelmts,
 				  size_t buf_stride, size_t bkg_stride,
-                                  void *buf, void *bkg,
-                                  hid_t dset_xfer_plist);
+                                  void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_uint(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_int(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_uint(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_long(hid_t src_id, hid_t dst_id,
 				   H5T_cdata_t *cdata, size_t nelmts,
 				   size_t buf_stride, size_t bkg_stride,
-                                   void *buf, void *bkg,
-                                   hid_t dset_xfer_plist);
+                                   void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_ulong(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_long(hid_t src_id, hid_t dst_id,
 				    H5T_cdata_t *cdata, size_t nelmts,
 				    size_t buf_stride, size_t bkg_stride,
-                                    void *buf, void *bkg,
-                                    hid_t dset_xfer_plist);
+                                    void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_ulong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_llong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_schar_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uchar_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_short_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ushort_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_int_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_uint_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_long_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ulong_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_llong_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_float(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_double(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ullong_ldouble(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_schar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_uchar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_short(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_ushort(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_int(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_uint(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_long(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_ulong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_llong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_float_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_schar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_uchar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_short(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_ushort(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_int(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_uint(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_long(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_ulong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_llong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_double_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_schar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_uchar(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_short(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_ushort(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_int(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_uint(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_long(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_ulong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_llong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 H5_DLL herr_t H5T__conv_ldouble_ullong(hid_t src_id, hid_t dst_id,
 				     H5T_cdata_t *cdata, size_t nelmts,
 				     size_t buf_stride, size_t bkg_stride,
-                                     void *buf, void *bkg,
-                                     hid_t dset_xfer_plist);
+                                     void *buf, void *bkg);
 
 /* Bit twiddling functions */
 H5_DLL void H5T__bit_copy(uint8_t *dst, size_t dst_offset, const uint8_t *src,
diff --git a/src/H5Tprecis.c b/src/H5Tprecis.c
index be85491..59bac8b 100644
--- a/src/H5Tprecis.c
+++ b/src/H5Tprecis.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tprivate.h b/src/H5Tprivate.h
index 7efcb41..8051b6d 100644
--- a/src/H5Tprivate.h
+++ b/src/H5Tprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -19,6 +17,9 @@
 #ifndef _H5Tprivate_H
 #define _H5Tprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5T_t H5T_t;
+
 /* Get package's public header */
 #include "H5Tpublic.h"
 
@@ -26,9 +27,9 @@
 #include "H5MMpublic.h"         /* Memory management                    */
 
 /* Private headers needed by this file */
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Gprivate.h"		/* Groups 			  	*/
-#include "H5Rprivate.h"		/* References				*/
+#include "H5private.h"          /* Generic Functions                        */
+#include "H5Gprivate.h"         /* Groups                                   */
+#include "H5Rprivate.h"         /* References                               */
 
 /* Macro for size of temporary buffers to contain a single element */
 #define H5T_ELEM_BUF_SIZE       256
@@ -47,7 +48,6 @@
 #endif /* H5T_MODULE */
 
 /* Forward references of package typedefs (declared in H5Tpkg.h) */
-typedef struct H5T_t H5T_t;
 typedef struct H5T_stats_t H5T_stats_t;
 typedef struct H5T_path_t H5T_path_t;
 
@@ -108,13 +108,14 @@ H5_DLL herr_t H5T_init(void);
 H5_DLL H5T_t *H5T_copy(H5T_t *old_dt, H5T_copy_t method);
 H5_DLL herr_t H5T_lock(H5T_t *dt, hbool_t immutable);
 H5_DLL herr_t H5T_close(H5T_t *dt);
+H5_DLL herr_t H5T_close_real(H5T_t *dt);
 H5_DLL H5T_t *H5T_get_super(const H5T_t *dt);
 H5_DLL H5T_class_t H5T_get_class(const H5T_t *dt, htri_t internal);
 H5_DLL htri_t H5T_detect_class(const H5T_t *dt, H5T_class_t cls, hbool_t from_api);
 H5_DLL size_t H5T_get_size(const H5T_t *dt);
 H5_DLL int    H5T_cmp(const H5T_t *dt1, const H5T_t *dt2, hbool_t superset);
 H5_DLL herr_t H5T_encode(H5T_t *obj, unsigned char *buf, size_t *nalloc);
-H5_DLL H5T_t *H5T_decode(const unsigned char *buf);
+H5_DLL H5T_t *H5T_decode(size_t buf_size, const unsigned char *buf);
 H5_DLL herr_t H5T_debug(const H5T_t *dt, FILE * stream);
 H5_DLL struct H5O_loc_t *H5T_oloc(H5T_t *dt);
 H5_DLL H5G_name_t *H5T_nameof(H5T_t *dt);
@@ -122,21 +123,18 @@ H5_DLL htri_t H5T_is_immutable(const H5T_t *dt);
 H5_DLL htri_t H5T_is_named(const H5T_t *dt);
 H5_DLL herr_t H5T_convert_committed_datatype(H5T_t *dt, H5F_t *f);
 H5_DLL htri_t H5T_is_relocatable(const H5T_t *dt);
-H5_DLL H5T_path_t *H5T_path_find(const H5T_t *src, const H5T_t *dst,
-    const char *name, H5T_conv_t func, hid_t dxpl_id, hbool_t is_api);
+H5_DLL H5T_path_t *H5T_path_find(const H5T_t *src, const H5T_t *dst);
 H5_DLL hbool_t H5T_path_noop(const H5T_path_t *p);
 H5_DLL H5T_bkg_t H5T_path_bkg(const H5T_path_t *p);
 H5_DLL H5T_subset_info_t *H5T_path_compound_subset(const H5T_path_t *p);
 H5_DLL herr_t H5T_convert(H5T_path_t *tpath, hid_t src_id, hid_t dst_id,
-    size_t nelmts, size_t buf_stride, size_t bkg_stride, void *buf, void *bkg,
-    hid_t dset_xfer_plist);
+    size_t nelmts, size_t buf_stride, size_t bkg_stride, void *buf, void *bkg);
 H5_DLL herr_t H5T_vlen_reclaim(void *elem, hid_t type_id, unsigned ndim, const hsize_t *point, void *_op_data);
-H5_DLL herr_t H5T_vlen_reclaim_elmt(void *elem, H5T_t *dt, hid_t dxpl_id);
-H5_DLL herr_t H5T_vlen_get_alloc_info(hid_t dxpl_id, H5T_vlen_alloc_info_t **vl_alloc_info);
+H5_DLL herr_t H5T_vlen_reclaim_elmt(void *elem, H5T_t *dt);
 H5_DLL htri_t H5T_set_loc(H5T_t *dt, H5F_t *f, H5T_loc_t loc);
 H5_DLL htri_t H5T_is_sensible(const H5T_t *dt);
 H5_DLL uint32_t H5T_hash(H5F_t * file, const H5T_t *dt);
-H5_DLL herr_t H5T_set_latest_version(H5T_t *dt);
+H5_DLL herr_t H5T_set_version(H5F_t *f, H5T_t *dt);
 H5_DLL herr_t H5T_patch_file(H5T_t *dt, H5F_t *f);
 H5_DLL herr_t H5T_patch_vlen_file(H5T_t *dt, H5F_t *f);
 H5_DLL htri_t H5T_is_variable_str(const H5T_t *dt);
@@ -145,9 +143,9 @@ H5_DLL htri_t H5T_is_variable_str(const H5T_t *dt);
 H5_DLL H5R_type_t H5T_get_ref_type(const H5T_t *dt);
 
 /* Operations on named datatypes */
-H5_DLL H5T_t *H5T_open(const H5G_loc_t *loc, hid_t dxpl_id);
+H5_DLL H5T_t *H5T_open(const H5G_loc_t *loc);
 H5_DLL htri_t H5T_committed(const H5T_t *type);
-H5_DLL int H5T_link(const H5T_t *type, int adjust, hid_t dxpl_id);
+H5_DLL int H5T_link(const H5T_t *type, int adjust);
 H5_DLL herr_t H5T_update_shared(H5T_t *type);
 
 /* Field functions (for both compound & enumerated types) */
diff --git a/src/H5Tpublic.h b/src/H5Tpublic.h
index df7ad41..fc3e4ee 100644
--- a/src/H5Tpublic.h
+++ b/src/H5Tpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tstrpad.c b/src/H5Tstrpad.c
index 2cd1db4..fa084f1 100644
--- a/src/H5Tstrpad.c
+++ b/src/H5Tstrpad.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tvisit.c b/src/H5Tvisit.c
index d732fb3..c706dee 100644
--- a/src/H5Tvisit.c
+++ b/src/H5Tvisit.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Tvlen.c b/src/H5Tvlen.c
index d198d50..ba31cd1 100644
--- a/src/H5Tvlen.c
+++ b/src/H5Tvlen.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -22,6 +20,7 @@
 
 
 #include "H5private.h"		/* Generic Functions			*/
+#include "H5CXprivate.h"        /* API Contexts                         */
 #include "H5Dprivate.h"		/* Dataset functions			*/
 #include "H5Eprivate.h"		/* Error handling		  	*/
 #include "H5HGprivate.h"	/* Global Heaps				*/
@@ -35,32 +34,24 @@ static herr_t H5T_vlen_reclaim_recurse(void *elem, const H5T_t *dt, H5MM_free_t
 static ssize_t H5T_vlen_seq_mem_getlen(const void *_vl);
 static void * H5T_vlen_seq_mem_getptr(void *_vl);
 static htri_t H5T_vlen_seq_mem_isnull(const H5F_t *f, void *_vl);
-static herr_t H5T_vlen_seq_mem_read(H5F_t *f, hid_t dxpl_id, void *_vl, void *_buf, size_t len);
-static herr_t H5T_vlen_seq_mem_write(H5F_t *f, hid_t dxpl_id, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *_buf, void *_bg, size_t seq_len, size_t base_size);
-static herr_t H5T_vlen_seq_mem_setnull(H5F_t *f, hid_t dxpl_id, void *_vl, void *_bg);
+static herr_t H5T_vlen_seq_mem_read(H5F_t *f, void *_vl, void *_buf, size_t len);
+static herr_t H5T_vlen_seq_mem_write(H5F_t *f, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *_buf, void *_bg, size_t seq_len, size_t base_size);
+static herr_t H5T_vlen_seq_mem_setnull(H5F_t *f, void *_vl, void *_bg);
 static ssize_t H5T_vlen_str_mem_getlen(const void *_vl);
 static void * H5T_vlen_str_mem_getptr(void *_vl);
 static htri_t H5T_vlen_str_mem_isnull(const H5F_t *f, void *_vl);
-static herr_t H5T_vlen_str_mem_read(H5F_t *f, hid_t dxpl_id, void *_vl, void *_buf, size_t len);
-static herr_t H5T_vlen_str_mem_write(H5F_t *f, hid_t dxpl_id, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *_buf, void *_bg, size_t seq_len, size_t base_size);
-static herr_t H5T_vlen_str_mem_setnull(H5F_t *f, hid_t dxpl_id, void *_vl, void *_bg);
+static herr_t H5T_vlen_str_mem_read(H5F_t *f, void *_vl, void *_buf, size_t len);
+static herr_t H5T_vlen_str_mem_write(H5F_t *f, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *_buf, void *_bg, size_t seq_len, size_t base_size);
+static herr_t H5T_vlen_str_mem_setnull(H5F_t *f, void *_vl, void *_bg);
 static ssize_t H5T_vlen_disk_getlen(const void *_vl);
 static void * H5T_vlen_disk_getptr(void *_vl);
 static htri_t H5T_vlen_disk_isnull(const H5F_t *f, void *_vl);
-static herr_t H5T_vlen_disk_read(H5F_t *f, hid_t dxpl_id, void *_vl, void *_buf, size_t len);
-static herr_t H5T_vlen_disk_write(H5F_t *f, hid_t dxpl_id, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *_buf, void *_bg, size_t seq_len, size_t base_size);
-static herr_t H5T_vlen_disk_setnull(H5F_t *f, hid_t dxpl_id, void *_vl, void *_bg);
+static herr_t H5T_vlen_disk_read(H5F_t *f, void *_vl, void *_buf, size_t len);
+static herr_t H5T_vlen_disk_write(H5F_t *f, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *_buf, void *_bg, size_t seq_len, size_t base_size);
+static herr_t H5T_vlen_disk_setnull(H5F_t *f, void *_vl, void *_bg);
 
 /* Local variables */
 
-/* Default settings for variable-length allocation routines */
-static H5T_vlen_alloc_info_t H5T_vlen_def_vl_alloc_info ={
-    H5D_VLEN_ALLOC,
-    H5D_VLEN_ALLOC_INFO,
-    H5D_VLEN_FREE,
-    H5D_VLEN_FREE_INFO
-};
-
 
 
 /*-------------------------------------------------------------------------
@@ -159,7 +150,7 @@ H5T__vlen_create(const H5T_t *base)
 
 done:
     if(!ret_value)
-        if(dt && H5T_close(dt) < 0)
+        if(dt && H5T_close_real(dt) < 0)
             HDONE_ERROR(H5E_DATATYPE, H5E_CANTRELEASE, NULL, "unable to release datatype info")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -213,7 +204,8 @@ H5T__vlen_set_loc(const H5T_t *dt, H5F_t *f, H5T_loc_t loc)
                     dt->shared->u.vlen.read = H5T_vlen_seq_mem_read;
                     dt->shared->u.vlen.write = H5T_vlen_seq_mem_write;
                     dt->shared->u.vlen.setnull = H5T_vlen_seq_mem_setnull;
-                } else if(dt->shared->u.vlen.type == H5T_VLEN_STRING) {
+                } /* end if */
+                else if(dt->shared->u.vlen.type == H5T_VLEN_STRING) {
                     /* size in memory, disk size is different */
                     dt->shared->size = sizeof(char *);
 
@@ -224,9 +216,9 @@ H5T__vlen_set_loc(const H5T_t *dt, H5F_t *f, H5T_loc_t loc)
                     dt->shared->u.vlen.read = H5T_vlen_str_mem_read;
                     dt->shared->u.vlen.write = H5T_vlen_str_mem_write;
                     dt->shared->u.vlen.setnull = H5T_vlen_str_mem_setnull;
-                } else {
+                } /* end else-if */
+                else
                     HDassert(0 && "Invalid VL type");
-                }
 
                 /* Reset file ID (since this VL is in memory) */
                 dt->shared->u.vlen.f = NULL;
@@ -403,7 +395,7 @@ H5T_vlen_seq_mem_isnull(const H5F_t H5_ATTR_UNUSED *f, void *_vl)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_seq_mem_read(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, void *_vl, void *buf, size_t len)
+H5T_vlen_seq_mem_read(H5F_t H5_ATTR_UNUSED *f, void *_vl, void *buf, size_t len)
 {
 #ifdef H5_NO_ALIGNMENT_RESTRICTIONS
     const hvl_t *vl=(const hvl_t *)_vl;   /* Pointer to the user's hvl_t information */
@@ -444,7 +436,7 @@ H5T_vlen_seq_mem_read(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, voi
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_seq_mem_write(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *buf, void H5_ATTR_UNUSED *_bg, size_t seq_len, size_t base_size)
+H5T_vlen_seq_mem_write(H5F_t H5_ATTR_UNUSED *f, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *buf, void H5_ATTR_UNUSED *_bg, size_t seq_len, size_t base_size)
 {
     hvl_t vl;                       /* Temporary hvl_t to use during operation */
     size_t len;
@@ -500,7 +492,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_seq_mem_setnull(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, void *_vl, void H5_ATTR_UNUSED *_bg)
+H5T_vlen_seq_mem_setnull(H5F_t H5_ATTR_UNUSED *f, void *_vl, void H5_ATTR_UNUSED *_bg)
 {
     hvl_t vl;                       /* Temporary hvl_t to use during operation */
 
@@ -634,7 +626,7 @@ H5T_vlen_str_mem_isnull(const H5F_t H5_ATTR_UNUSED *f, void *_vl)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_str_mem_read(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, void *_vl, void *buf, size_t len)
+H5T_vlen_str_mem_read(H5F_t H5_ATTR_UNUSED *f, void *_vl, void *buf, size_t len)
 {
 #ifdef H5_NO_ALIGNMENT_RESTRICTIONS
     char *s=*(char **)_vl;   /* Pointer to the user's string information */
@@ -674,7 +666,9 @@ H5T_vlen_str_mem_read(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, voi
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_str_mem_write(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const H5T_vlen_alloc_info_t *vl_alloc_info, void *_vl, void *buf, void H5_ATTR_UNUSED *_bg, size_t seq_len, size_t base_size)
+H5T_vlen_str_mem_write(H5F_t H5_ATTR_UNUSED *f, const H5T_vlen_alloc_info_t *vl_alloc_info,
+    void *_vl, void *buf, void H5_ATTR_UNUSED *_bg, size_t seq_len,
+    size_t base_size)
 {
     char *t;                        /* Pointer to temporary buffer allocated */
     size_t len;                     /* Maximum length of the string to copy */
@@ -720,7 +714,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_str_mem_setnull(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, void *_vl, void H5_ATTR_UNUSED *_bg)
+H5T_vlen_str_mem_setnull(H5F_t H5_ATTR_UNUSED *f, void *_vl, void H5_ATTR_UNUSED *_bg)
 {
     char *t=NULL;                   /* Pointer to temporary buffer allocated */
 
@@ -832,7 +826,7 @@ H5T_vlen_disk_isnull(const H5F_t *f, void *_vl)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_disk_read(H5F_t *f, hid_t dxpl_id, void *_vl, void *buf, size_t H5_ATTR_UNUSED len)
+H5T_vlen_disk_read(H5F_t *f, void *_vl, void *buf, size_t H5_ATTR_UNUSED len)
 {
     uint8_t *vl=(uint8_t *)_vl;   /* Pointer to the user's hvl_t information */
     H5HG_t hobjid;
@@ -849,15 +843,14 @@ H5T_vlen_disk_read(H5F_t *f, hid_t dxpl_id, void *_vl, void *buf, size_t H5_ATTR
     vl += 4;
 
     /* Get the heap information */
-    H5F_addr_decode(f,(const uint8_t **)&vl,&(hobjid.addr));
-    UINT32DECODE(vl,hobjid.idx);
+    H5F_addr_decode(f, (const uint8_t **)&vl, &(hobjid.addr));
+    UINT32DECODE(vl, hobjid.idx);
 
     /* Check if this sequence actually has any data */
-    if(hobjid.addr>0) {
+    if(hobjid.addr > 0)
         /* Read the VL information from disk */
-        if(H5HG_read(f,dxpl_id,&hobjid,buf, NULL)==NULL)
+        if(NULL == H5HG_read(f, &hobjid, buf, NULL))
             HGOTO_ERROR(H5E_DATATYPE, H5E_READERROR, FAIL, "Unable to read VL information")
-    } /* end if */
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -877,7 +870,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_disk_write(H5F_t *f, hid_t dxpl_id, const H5T_vlen_alloc_info_t H5_ATTR_UNUSED *vl_alloc_info,
+H5T_vlen_disk_write(H5F_t *f, const H5T_vlen_alloc_info_t H5_ATTR_UNUSED *vl_alloc_info,
     void *_vl, void *buf, void *_bg, size_t seq_len, size_t base_size)
 {
     uint8_t *vl = (uint8_t *)_vl; /*Pointer to the user's hvl_t information*/
@@ -905,11 +898,10 @@ H5T_vlen_disk_write(H5F_t *f, hid_t dxpl_id, const H5T_vlen_alloc_info_t H5_ATTR
         UINT32DECODE(bg, bg_hobjid.idx);
 
         /* Free heap object for old data */
-        if(bg_hobjid.addr > 0) {
+        if(bg_hobjid.addr > 0)
             /* Free heap object */
-            if(H5HG_remove(f, dxpl_id, &bg_hobjid) < 0)
+            if(H5HG_remove(f, &bg_hobjid) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "Unable to remove heap object")
-        } /* end if */
     } /* end if */
 
     /* Set the length of the sequence */
@@ -917,7 +909,7 @@ H5T_vlen_disk_write(H5F_t *f, hid_t dxpl_id, const H5T_vlen_alloc_info_t H5_ATTR
 
     /* Write the VL information to disk (allocates space also) */
     len = (seq_len*base_size);
-    if(H5HG_insert(f, dxpl_id, len, buf, &hobjid) < 0)
+    if(H5HG_insert(f, len, buf, &hobjid) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "Unable to write VL information")
 
     /* Encode the heap information */
@@ -942,7 +934,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5T_vlen_disk_setnull(H5F_t *f, hid_t dxpl_id, void *_vl, void *_bg)
+H5T_vlen_disk_setnull(H5F_t *f, void *_vl, void *_bg)
 {
     uint8_t *vl = (uint8_t *)_vl; /*Pointer to the user's hvl_t information*/
     uint8_t *bg = (uint8_t *)_bg; /*Pointer to the old data hvl_t          */
@@ -969,7 +961,7 @@ H5T_vlen_disk_setnull(H5F_t *f, hid_t dxpl_id, void *_vl, void *_bg)
         /* Free heap object for old data */
         if(bg_hobjid.addr > 0) {
             /* Free heap object */
-            if(H5HG_remove(f, dxpl_id, &bg_hobjid) < 0)
+            if(H5HG_remove(f, &bg_hobjid) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_WRITEERROR, FAIL, "Unable to remove heap object")
          } /* end if */
     } /* end if */
@@ -992,7 +984,7 @@ done:
  PURPOSE
     Internal recursive routine to free VL datatypes
  USAGE
-    herr_t H5T_vlen_reclaim(elem,dt)
+    herr_t H5T_vlen_reclaim_recurse(elem,dt)
         void *elem;  IN/OUT: Pointer to the dataset element
         H5T_t *dt;   IN: Datatype of dataset element
 
@@ -1136,7 +1128,8 @@ done:
  REVISION LOG
 --------------------------------------------------------------------------*/
 herr_t
-H5T_vlen_reclaim(void *elem, hid_t type_id, unsigned H5_ATTR_UNUSED ndim, const hsize_t H5_ATTR_UNUSED *point, void *op_data)
+H5T_vlen_reclaim(void *elem, hid_t type_id, unsigned H5_ATTR_UNUSED ndim,
+    const hsize_t H5_ATTR_UNUSED *point, void *op_data)
 {
     H5T_vlen_alloc_info_t *vl_alloc_info = (H5T_vlen_alloc_info_t *)op_data; /* VL allocation info from iterator */
     H5T_t	*dt;
@@ -1161,73 +1154,11 @@ done:
 }   /* end H5T_vlen_reclaim() */
 
 
-/*--------------------------------------------------------------------------
- NAME
-    H5T_vlen_get_alloc_info
- PURPOSE
-    Retrieve allocation info for VL datatypes
- USAGE
-    herr_t H5T_vlen_get_alloc_info(dxpl_id,vl_alloc_info)
-        hid_t dxpl_id;   IN: Data transfer property list to query
-        H5T_vlen_alloc_info_t *vl_alloc_info;  IN/OUT: Pointer to VL allocation information to fill
-
- RETURNS
-    SUCCEED/FAIL
- DESCRIPTION
-    Retrieve the VL allocation functions and information from a dataset
-    transfer property list.
- GLOBAL VARIABLES
- COMMENTS, BUGS, ASSUMPTIONS
-    The VL_ALLOC_INFO pointer should point at already allocated memory to place
-    non-default property list info.  If a default property list is used, the
-    VL_ALLOC_INFO pointer will be changed to point at the default information.
- EXAMPLES
- REVISION LOG
---------------------------------------------------------------------------*/
-herr_t
-H5T_vlen_get_alloc_info(hid_t dxpl_id, H5T_vlen_alloc_info_t **vl_alloc_info)
-{
-    H5P_genplist_t *plist;              /* DX property list */
-    herr_t ret_value=SUCCEED;
-
-    FUNC_ENTER_NOAPI(FAIL)
-
-    HDassert(H5I_GENPROP_LST == H5I_get_type(dxpl_id));
-    HDassert(vl_alloc_info);
-
-    /* Check for the default DXPL */
-    if(dxpl_id==H5P_DATASET_XFER_DEFAULT)
-        *vl_alloc_info=&H5T_vlen_def_vl_alloc_info;
-    else {
-        /* Check args */
-        if(NULL == (plist = H5P_object_verify(dxpl_id,H5P_DATASET_XFER)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a dataset transfer property list")
-
-        /* Get the allocation functions & information */
-        if (H5P_get(plist,H5D_XFER_VLEN_ALLOC_NAME,&(*vl_alloc_info)->alloc_func) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get value")
-        if (H5P_get(plist,H5D_XFER_VLEN_ALLOC_INFO_NAME,&(*vl_alloc_info)->alloc_info) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get value")
-        if (H5P_get(plist,H5D_XFER_VLEN_FREE_NAME,&(*vl_alloc_info)->free_func) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get value")
-        if (H5P_get(plist,H5D_XFER_VLEN_FREE_INFO_NAME,&(*vl_alloc_info)->free_info) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "unable to get value")
-    } /* end else */
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-}   /* end H5T_vlen_get_alloc_info() */
-
-
 /*-------------------------------------------------------------------------
  * Function:	H5T_vlen_reclaim_elmt
  *
  * Purpose: Alternative method to reclaim any VL data for a buffer element.
  * 
- *          Use this function when the datatype is already available, but 
- *          the allocation info is needed from the dxpl_id before jumping
- *          into recursion.
- *
  * Return:	Non-negative on success/Negative on failure
  *
  * Programmer:	Mike McGreevy
@@ -1236,11 +1167,10 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5T_vlen_reclaim_elmt(void *elem, H5T_t *dt, hid_t dxpl_id)
+H5T_vlen_reclaim_elmt(void *elem, H5T_t *dt)
 {
-    H5T_vlen_alloc_info_t _vl_alloc_info;       /* VL allocation info buffer */
-    H5T_vlen_alloc_info_t *vl_alloc_info = &_vl_alloc_info;   /* VL allocation info */
-    herr_t ret_value = SUCCEED;                  /* return value */
+    H5T_vlen_alloc_info_t vl_alloc_info;   /* VL allocation info */
+    herr_t ret_value = SUCCEED;            /* return value */
 
     HDassert(dt);
     HDassert(elem);
@@ -1248,11 +1178,11 @@ H5T_vlen_reclaim_elmt(void *elem, H5T_t *dt, hid_t dxpl_id)
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Get VL allocation info */
-    if(H5T_vlen_get_alloc_info(dxpl_id, &vl_alloc_info) < 0)
+    if(H5CX_get_vlen_alloc_info(&vl_alloc_info) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTGET, FAIL, "unable to retrieve VL allocation info")
 
     /* Recurse on buffer to free dynamic fields */
-    if(H5T_vlen_reclaim_recurse(elem, dt, vl_alloc_info->free_func, vl_alloc_info->free_info) < 0)
+    if(H5T_vlen_reclaim_recurse(elem, dt, vl_alloc_info.free_func, vl_alloc_info.free_info) < 0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTFREE, FAIL, "can't reclaim vlen elements")
 
 done:
diff --git a/src/H5UC.c b/src/H5UC.c
index 5762cc5..2277818 100644
--- a/src/H5UC.c
+++ b/src/H5UC.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5UCprivate.h b/src/H5UCprivate.h
index a702c03..c451f31 100644
--- a/src/H5UCprivate.h
+++ b/src/H5UCprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5VM.c b/src/H5VM.c
index c546609..4c0b837 100644
--- a/src/H5VM.c
+++ b/src/H5VM.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5VMprivate.h b/src/H5VMprivate.h
index cbe108a..decac7e 100644
--- a/src/H5VMprivate.h
+++ b/src/H5VMprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -462,7 +460,11 @@ H5VM_power2up(hsize_t n)
 {
     hsize_t     ret_value = 1;  /* Return value */
 
-    while(ret_value < n)
+    /* Returns 0 when n exceeds 2^63 */
+    if(n >= (hsize_t)1 << ((sizeof(hsize_t) * CHAR_BIT) - 1))
+        ret_value = 0;
+
+    while(ret_value && ret_value < n)
         ret_value <<= 1;
 
     return(ret_value);
diff --git a/src/H5WB.c b/src/H5WB.c
index 978ded4..8a85a3a 100644
--- a/src/H5WB.c
+++ b/src/H5WB.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5WBprivate.h b/src/H5WBprivate.h
index cfa3fcb..4460808 100644
--- a/src/H5WBprivate.h
+++ b/src/H5WBprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5Z.c b/src/H5Z.c
index f601039..f68fbce 100644
--- a/src/H5Z.c
+++ b/src/H5Z.c
@@ -5,28 +5,27 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Zmodule.h"          /* This source code file is part of the H5Z module */
 
 
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5Dprivate.h"		/* Dataset functions			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Fprivate.h"		/* File		  			*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
-#include "H5Oprivate.h"		/* Object headers		  	*/
-#include "H5Pprivate.h"         /* Property lists                       */
-#include "H5PLprivate.h"        /* Plugins                              */
-#include "H5Sprivate.h"		/* Dataspace functions			*/
-#include "H5Zpkg.h"		/* Data filters				*/
+#include "H5private.h"          /* Generic Functions   */
+#include "H5CXprivate.h"        /* API Contexts        */
+#include "H5Dprivate.h"         /* Dataset functions   */
+#include "H5Eprivate.h"         /* Error handling      */
+#include "H5Fprivate.h"         /* File                */
+#include "H5Iprivate.h"         /* IDs                 */
+#include "H5MMprivate.h"        /* Memory management   */
+#include "H5Oprivate.h"         /* Object headers      */
+#include "H5Pprivate.h"         /* Property lists      */
+#include "H5PLprivate.h"        /* Plugins             */
+#include "H5Sprivate.h"         /* Dataspace functions */
+#include "H5Zpkg.h"             /* Data filters        */
 
 #ifdef H5_HAVE_SZLIB_H
 #   include "szlib.h"
@@ -36,16 +35,19 @@
 #ifdef H5Z_DEBUG
 typedef struct H5Z_stats_t {
     struct {
-	hsize_t	total;		/*total number of bytes processed	*/
-	hsize_t	errors;		/*bytes of total attributable to errors	*/
-	H5_timer_t timer;	/*execution time including errors	*/
-    } stats[2];			/*0=output, 1=input			*/
+        hsize_t    total;    /* total number of bytes processed */
+        hsize_t    errors;   /* bytes of total attributable to errors */
+        H5_timer_t timer;    /* execution time including errors */
+    } stats[2];              /* 0=output, 1=input */
 } H5Z_stats_t;
 #endif /* H5Z_DEBUG */
 
 typedef struct H5Z_object_t {
-    H5Z_filter_t filter_id;     /* ID of the filter we're looking for         */
-    htri_t       found;         /* Whether we find an object using the filter */
+    H5Z_filter_t filter_id;     /* ID of the filter we're looking for */
+    htri_t      found;          /* Whether we find an object using the filter */
+#ifdef H5_HAVE_PARALLEL
+    hbool_t     sanity_checked; /* Whether the sanity check for collectively calling H5Zunregister has been done */
+#endif /* H5_HAVE_PARALLEL */
 } H5Z_object_t;
 
 /* Enumerated type for dataset creation prelude callbacks */
@@ -58,11 +60,11 @@ typedef enum {
 hbool_t H5_PKG_INIT_VAR = FALSE;
 
 /* Local variables */
-static size_t		H5Z_table_alloc_g = 0;
-static size_t		H5Z_table_used_g = 0;
-static H5Z_class2_t	*H5Z_table_g = NULL;
+static size_t                H5Z_table_alloc_g = 0;
+static size_t                H5Z_table_used_g = 0;
+static H5Z_class2_t         *H5Z_table_g = NULL;
 #ifdef H5Z_DEBUG
-static H5Z_stats_t	*H5Z_stat_table_g = NULL;
+static H5Z_stats_t          *H5Z_stat_table_g = NULL;
 #endif /* H5Z_DEBUG */
 
 /* Local functions */
@@ -73,15 +75,11 @@ static int H5Z__flush_file_cb(void *obj_ptr, hid_t obj_id, void *key);
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z__init_package
+ * Function: H5Z__init_package
  *
- * Purpose:	Initializes the data filter layer.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Thursday, April 16, 1998
+ * Purpose:  Initializes the data filter layer.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -92,24 +90,24 @@ H5Z__init_package(void)
     FUNC_ENTER_PACKAGE
 
     /* Internal filters */
-    if(H5Z_register(H5Z_SHUFFLE) < 0)
+    if (H5Z_register(H5Z_SHUFFLE) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register shuffle filter")
-    if(H5Z_register(H5Z_FLETCHER32) < 0)
+    if (H5Z_register(H5Z_FLETCHER32) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register fletcher32 filter")
-    if(H5Z_register(H5Z_NBIT) < 0)
+    if (H5Z_register(H5Z_NBIT) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register nbit filter")
-    if(H5Z_register(H5Z_SCALEOFFSET) < 0)
+    if (H5Z_register(H5Z_SCALEOFFSET) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register scaleoffset filter")
 
     /* External filters */
 #ifdef H5_HAVE_FILTER_DEFLATE
-    if(H5Z_register(H5Z_DEFLATE) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register deflate filter")
+    if (H5Z_register(H5Z_DEFLATE) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register deflate filter")
 #endif /* H5_HAVE_FILTER_DEFLATE */
 #ifdef H5_HAVE_FILTER_SZIP
     H5Z_SZIP->encoder_present = SZ_encoder_enabled();
-    if(H5Z_register(H5Z_SZIP) < 0)
-        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register szip filter")
+    if (H5Z_register(H5Z_SZIP) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register szip filter")
 #endif /* H5_HAVE_FILTER_SZIP */
 
 done:
@@ -118,21 +116,17 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_term_package
- *
- * Purpose:	Terminate the H5Z layer.
+ * Function: H5Z_term_package
  *
- * Return:	void
- *
- * Programmer:	Robb Matzke
- *              Thursday, April 16, 1998
+ * Purpose:  Terminate the H5Z layer.
  *
+ * Return:   void
  *-------------------------------------------------------------------------
  */
 int
 H5Z_term_package(void)
 {
-    int	n = 0;
+    int        n = 0;
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
@@ -142,55 +136,55 @@ H5Z_term_package(void)
         int dir, nprint = 0;
         size_t i;
 
-	if(H5DEBUG(Z)) {
-	    for(i = 0; i < H5Z_table_used_g; i++) {
-		for(dir = 0; dir<2; dir++) {
-		    if(0 == H5Z_stat_table_g[i].stats[dir].total)
+        if(H5DEBUG(Z)) {
+            for(i = 0; i < H5Z_table_used_g; i++) {
+                for(dir = 0; dir<2; dir++) {
+                    if(0 == H5Z_stat_table_g[i].stats[dir].total)
                         continue;
 
-		    if(0 == nprint++) {
-			/* Print column headers */
-			HDfprintf(H5DEBUG(Z), "H5Z: filter statistics "
-				   "accumulated over life of library:\n");
-			HDfprintf(H5DEBUG(Z),
-				   "   %-16s %10s %10s %8s %8s %8s %10s\n",
-				   "Filter", "Total", "Errors", "User",
-				   "System", "Elapsed", "Bandwidth");
-			HDfprintf(H5DEBUG(Z),
-				   "   %-16s %10s %10s %8s %8s %8s %10s\n",
-				   "------", "-----", "------", "----",
-				   "------", "-------", "---------");
-		    } /* end if */
-
-		    /* Truncate the comment to fit in the field */
-		    HDstrncpy(comment, H5Z_table_g[i].name, sizeof comment);
-		    comment[sizeof(comment) - 1] = '\0';
-
-		    /*
-		     * Format bandwidth to have four significant digits and
-		     * units of `B/s', `kB/s', `MB/s', `GB/s', or `TB/s' or
-		     * the word `Inf' if the elapsed time is zero.
-		     */
-		    H5_bandwidth(bandwidth,
-				 (double)(H5Z_stat_table_g[i].stats[dir].total),
-				 H5Z_stat_table_g[i].stats[dir].timer.etime);
-
-		    /* Print the statistics */
-		    HDfprintf(H5DEBUG(Z),
-			       "   %s%-15s %10Hd %10Hd %8.2f %8.2f %8.2f "
-			       "%10s\n", dir?"<":">", comment,
-			       H5Z_stat_table_g[i].stats[dir].total,
-			       H5Z_stat_table_g[i].stats[dir].errors,
-			       H5Z_stat_table_g[i].stats[dir].timer.utime,
-			       H5Z_stat_table_g[i].stats[dir].timer.stime,
-			       H5Z_stat_table_g[i].stats[dir].timer.etime,
-			       bandwidth);
-		} /* end for */
-	    } /* end for */
-	} /* end if */
+                    if(0 == nprint++) {
+                        /* Print column headers */
+                        HDfprintf(H5DEBUG(Z), "H5Z: filter statistics "
+                                "accumulated over life of library:\n");
+                        HDfprintf(H5DEBUG(Z),
+                                "   %-16s %10s %10s %8s %8s %8s %10s\n",
+                                "Filter", "Total", "Errors", "User",
+                                "System", "Elapsed", "Bandwidth");
+                        HDfprintf(H5DEBUG(Z),
+                                "   %-16s %10s %10s %8s %8s %8s %10s\n",
+                                "------", "-----", "------", "----",
+                                "------", "-------", "---------");
+                    } /* end if */
+
+                    /* Truncate the comment to fit in the field */
+                    HDstrncpy(comment, H5Z_table_g[i].name, sizeof comment);
+                    comment[sizeof(comment) - 1] = '\0';
+
+                    /*
+                    * Format bandwidth to have four significant digits and
+                    * units of `B/s', `kB/s', `MB/s', `GB/s', or `TB/s' or
+                    * the word `Inf' if the elapsed time is zero.
+                    */
+                    H5_bandwidth(bandwidth,
+                            (double)(H5Z_stat_table_g[i].stats[dir].total),
+                            H5Z_stat_table_g[i].stats[dir].timer.etime);
+
+                    /* Print the statistics */
+                    HDfprintf(H5DEBUG(Z),
+                            "   %s%-15s %10Hd %10Hd %8.2f %8.2f %8.2f "
+                            "%10s\n", dir?"<":">", comment,
+                            H5Z_stat_table_g[i].stats[dir].total,
+                            H5Z_stat_table_g[i].stats[dir].errors,
+                            H5Z_stat_table_g[i].stats[dir].timer.utime,
+                            H5Z_stat_table_g[i].stats[dir].timer.stime,
+                            H5Z_stat_table_g[i].stats[dir].timer.etime,
+                            bandwidth);
+                } /* end for */
+            } /* end for */
+        } /* end if */
 #endif /* H5Z_DEBUG */
-	/* Free the table of filters */
-        if(H5Z_table_g) {
+        /* Free the table of filters */
+        if (H5Z_table_g) {
             H5Z_table_g = (H5Z_class2_t *)H5MM_xfree(H5Z_table_g);
 #ifdef H5Z_DEBUG
             H5Z_stat_table_g = (H5Z_stats_t *)H5MM_xfree(H5Z_stat_table_g);
@@ -200,8 +194,8 @@ H5Z_term_package(void)
             n++;
         } /* end if */
 
-	/* Mark interface as closed */
-        if(0 == n)
+        /* Mark interface as closed */
+        if (0 == n)
             H5_PKG_INIT_VAR = FALSE;
     } /* end if */
 
@@ -210,34 +204,26 @@ H5Z_term_package(void)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Zregister
- *
- * Purpose:	This function registers new filter.
+ * Function: H5Zregister
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Thursday, April 16, 1998
- *
- * Modifications:
- *              Changed to pass in H5Z_class_t struct
- *              Quincey Koziol, April  5, 2003
+ * Purpose:  This function registers new filter.
  *
+ * Return:   Non-negative on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Zregister(const void *cls)
 {
     const H5Z_class2_t  *cls_real = (const H5Z_class2_t *) cls; /* "Real" class pointer */
-    H5Z_class2_t        cls_new;                /* Translated class struct */
-    herr_t              ret_value=SUCCEED;      /* Return value */
+    H5Z_class2_t        cls_new;                  /* Translated class struct */
+    herr_t              ret_value = SUCCEED;      /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "*x", cls);
 
     /* Check args */
     if (cls_real==NULL)
-	HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter class")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter class")
 
     /* Check H5Z_class_t version number; this is where a function to convert
      * from an outdated version should be called.
@@ -249,7 +235,7 @@ H5Zregister(const void *cls)
      * at least 256, there should be no overlap and the version of the struct
      * can be determined by the value of the first field.
      */
-    if(cls_real->version != H5Z_CLASS_T_VERS) {
+    if (cls_real->version != H5Z_CLASS_T_VERS) {
 #ifndef H5_NO_DEPRECATED_SYMBOLS
         /* Assume it is an old "H5Z_class1_t" instead */
         const H5Z_class1_t *cls_old = (const H5Z_class1_t *) cls;
@@ -273,16 +259,16 @@ H5Zregister(const void *cls)
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
     } /* end if */
 
-    if (cls_real->id<0 || cls_real->id>H5Z_FILTER_MAX)
-	HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
-    if (cls_real->id<H5Z_FILTER_RESERVED)
-	HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters")
-    if (cls_real->filter==NULL)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no filter function specified")
+    if (cls_real->id < 0 || cls_real->id > H5Z_FILTER_MAX)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
+    if (cls_real->id < H5Z_FILTER_RESERVED)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters")
+    if (cls_real->filter == NULL)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "no filter function specified")
 
     /* Do it */
-    if (H5Z_register (cls_real)<0)
-	HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
+    if (H5Z_register(cls_real) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -290,25 +276,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_register
- *
- * Purpose:	Same as the public version except this one allows filters
- *		to be set for predefined method numbers <H5Z_FILTER_RESERVED
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Thursday, April 16, 1998
+ * Function: H5Z_register
  *
- * Modifications:
+ * Purpose:  Same as the public version except this one allows filters
+ *           to be set for predefined method numbers < H5Z_FILTER_RESERVED
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Z_register (const H5Z_class2_t *cls)
 {
-    size_t	i;
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    size_t    i;
+    herr_t    ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -316,40 +297,40 @@ H5Z_register (const H5Z_class2_t *cls)
     HDassert(cls->id >= 0 && cls->id <= H5Z_FILTER_MAX);
 
     /* Is the filter already registered? */
-    for(i = 0; i < H5Z_table_used_g; i++)
-	if(H5Z_table_g[i].id == cls->id)
+    for (i = 0; i < H5Z_table_used_g; i++)
+        if (H5Z_table_g[i].id == cls->id)
             break;
 
     /* Filter not already registered */
-    if(i >= H5Z_table_used_g) {
-	if(H5Z_table_used_g >= H5Z_table_alloc_g) {
-	    size_t n = MAX(H5Z_MAX_NFILTERS, 2*H5Z_table_alloc_g);
-	    H5Z_class2_t *table = (H5Z_class2_t *)H5MM_realloc(H5Z_table_g, n * sizeof(H5Z_class2_t));
+    if (i >= H5Z_table_used_g) {
+        if (H5Z_table_used_g >= H5Z_table_alloc_g) {
+            size_t n = MAX(H5Z_MAX_NFILTERS, 2 * H5Z_table_alloc_g);
+            H5Z_class2_t *table = (H5Z_class2_t *)H5MM_realloc(H5Z_table_g, n * sizeof(H5Z_class2_t));
 #ifdef H5Z_DEBUG
-	    H5Z_stats_t *stat_table = (H5Z_stats_t *)H5MM_realloc(H5Z_stat_table_g, n * sizeof(H5Z_stats_t));
+            H5Z_stats_t *stat_table = (H5Z_stats_t *)H5MM_realloc(H5Z_stat_table_g, n * sizeof(H5Z_stats_t));
 #endif /* H5Z_DEBUG */
-	    if(!table)
-		HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter table")
-	    H5Z_table_g = table;
+            if (!table)
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter table")
+            H5Z_table_g = table;
 #ifdef H5Z_DEBUG
-	    if(!stat_table)
-		HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter statistics table")
-	    H5Z_stat_table_g = stat_table;
+            if (!stat_table)
+                HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to extend filter statistics table")
+            H5Z_stat_table_g = stat_table;
 #endif /* H5Z_DEBUG */
-	    H5Z_table_alloc_g = n;
-	} /* end if */
+            H5Z_table_alloc_g = n;
+        } /* end if */
 
-	/* Initialize */
-	i = H5Z_table_used_g++;
-	HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
+        /* Initialize */
+        i = H5Z_table_used_g++;
+        HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
 #ifdef H5Z_DEBUG
-	HDmemset(H5Z_stat_table_g+i, 0, sizeof(H5Z_stats_t));
+        HDmemset(H5Z_stat_table_g+i, 0, sizeof(H5Z_stats_t));
 #endif /* H5Z_DEBUG */
     } /* end if */
     /* Filter already registered */
     else {
-	/* Replace old contents */
-	HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
+        /* Replace old contents */
+        HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
     } /* end else */
 
 done:
@@ -358,34 +339,31 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Zunregister
- *
- * Purpose:	This function unregisters a filter.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5Zunregister
  *
- * Programmer:	Quincey Koziol
- *              Thursday, November 14, 2002
+ * Purpose:  This function unregisters a filter.
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Zunregister(H5Z_filter_t id)
 {
-    herr_t      ret_value=SUCCEED;       /* Return value */
+    herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("e", "Zf", id);
 
     /* Check args */
-    if(id < 0 || id > H5Z_FILTER_MAX)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
-    if(id < H5Z_FILTER_RESERVED)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters")
+    if (id < 0 || id > H5Z_FILTER_MAX)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
+    if (id < H5Z_FILTER_RESERVED)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "unable to modify predefined filters")
 
     /* Do it */
-    if(H5Z_unregister(id) < 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to unregister filter")
+    if(H5Z__unregister(id) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to unregister filter")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -393,84 +371,80 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_unregister
- *
- * Purpose:	Same as the public version except this one allows filters
- *		to be unset for predefined method numbers <H5Z_FILTER_RESERVED
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5Z__unregister
  *
- * Programmer:	Quincey Koziol
- *              Thursday, November 14, 2002
+ * Purpose:  Same as the public version except this one allows filters
+ *           to be unset for predefined method numbers <H5Z_FILTER_RESERVED
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
-H5Z_unregister(H5Z_filter_t filter_id)
+H5Z__unregister(H5Z_filter_t filter_id)
 {
-    size_t       filter_index;        /* Local index variable for filter */
-    H5Z_object_t object;
-    herr_t       ret_value=SUCCEED;   /* Return value */
+    size_t       filter_index;          /* Local index variable for filter */
+    H5Z_object_t object;                /* Object to pass to callbacks */
+    herr_t       ret_value = SUCCEED;   /* Return value */
 
-    FUNC_ENTER_NOAPI(FAIL)
+    FUNC_ENTER_PACKAGE_VOL
 
     HDassert(filter_id>=0 && filter_id<=H5Z_FILTER_MAX);
 
     /* Is the filter already registered? */
-    for (filter_index=0; filter_index<H5Z_table_used_g; filter_index++)
-	if (H5Z_table_g[filter_index].id==filter_id)
+    for (filter_index = 0; filter_index < H5Z_table_used_g; filter_index++)
+        if (H5Z_table_g[filter_index].id == filter_id)
             break;
 
     /* Fail if filter not found */
-    if (filter_index>=H5Z_table_used_g)
+    if (filter_index >= H5Z_table_used_g)
         HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter is not registered")
 
     /* Initialize the structure object for iteration */
     object.filter_id = filter_id;
     object.found = FALSE;
+#ifdef H5_HAVE_PARALLEL
+    object.sanity_checked = FALSE;
+#endif /* H5_HAVE_PARALLEL */
 
     /* Iterate through all opened datasets, returns a failure if any of them uses the filter */
-    if(H5I_iterate(H5I_DATASET, H5Z__check_unregister_dset_cb, &object, FALSE) < 0)
+    if (H5I_iterate(H5I_DATASET, H5Z__check_unregister_dset_cb, &object, FALSE) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed")
 
-    if(object.found)
+    if (object.found)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTRELEASE, FAIL, "can't unregister filter because a dataset is still using it")
 
     /* Iterate through all opened groups, returns a failure if any of them uses the filter */
-    if(H5I_iterate(H5I_GROUP, H5Z__check_unregister_group_cb, &object, FALSE) < 0)
+    if (H5I_iterate(H5I_GROUP, H5Z__check_unregister_group_cb, &object, FALSE) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed")
 
-    if(object.found)
+    if (object.found)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTRELEASE, FAIL, "can't unregister filter because a group is still using it")
 
     /* Iterate through all opened files and flush them */
-    if(H5I_iterate(H5I_FILE, H5Z__flush_file_cb, NULL, FALSE) < 0)
+    if (H5I_iterate(H5I_FILE, H5Z__flush_file_cb, &object, FALSE) < 0)
         HGOTO_ERROR(H5E_FILE, H5E_BADITER, FAIL, "iteration failed")
 
     /* Remove filter from table */
     /* Don't worry about shrinking table size (for now) */
-    HDmemmove(&H5Z_table_g[filter_index],&H5Z_table_g[filter_index+1],sizeof(H5Z_class2_t)*((H5Z_table_used_g-1)-filter_index));
+    HDmemmove(&H5Z_table_g[filter_index], &H5Z_table_g[filter_index+1], sizeof(H5Z_class2_t)*((H5Z_table_used_g-1)-filter_index));
 #ifdef H5Z_DEBUG
-    HDmemmove(&H5Z_stat_table_g[filter_index],&H5Z_stat_table_g[filter_index+1],sizeof(H5Z_stats_t)*((H5Z_table_used_g-1)-filter_index));
+    HDmemmove(&H5Z_stat_table_g[filter_index], &H5Z_stat_table_g[filter_index+1], sizeof(H5Z_stats_t)*((H5Z_table_used_g-1)-filter_index));
 #endif /* H5Z_DEBUG */
     H5Z_table_used_g--;
 
 done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* end H5Z_unregister() */
+    FUNC_LEAVE_NOAPI_VOL(ret_value)
+} /* end H5Z__unregister() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z__check_unregister
+ * Function: H5Z__check_unregister
  *
- * Purpose:	Check if an object uses the filter to be unregistered.
- *
- * Return:      TRUE if the object uses the filter.
- *              FALSE if not, NEGATIVE on error.
- *
- * Programmer:  Quincey Koziol
- *              11 May 2013
+ * Purpose: Check if an object uses the filter to be unregistered.
  *
+ * Return:  TRUE if the object uses the filter.
+ *          FALSE if not, NEGATIVE on error.
  *-------------------------------------------------------------------------
  */
 static htri_t
@@ -482,11 +456,11 @@ H5Z__check_unregister(hid_t ocpl_id, H5Z_filter_t filter_id)
     FUNC_ENTER_STATIC
 
     /* Get the plist structure of object creation */
-    if(NULL == (plist = H5P_object_verify(ocpl_id, H5P_OBJECT_CREATE)))
+    if (NULL == (plist = H5P_object_verify(ocpl_id, H5P_OBJECT_CREATE)))
         HGOTO_ERROR(H5E_PLINE, H5E_BADATOM, FAIL, "can't find object for ID")
 
     /* Check if the object creation property list uses the filter */
-    if((ret_value = H5P_filter_in_pline(plist, filter_id)) < 0)
+    if ((ret_value = H5P_filter_in_pline(plist, filter_id)) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
 
 done:
@@ -495,19 +469,15 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z__check_unregister_group_cb
- *
- * Purpose:	The callback function for H5Z_unregister. It iterates 
- *              through all opened objects.  If the object is a dataset
- *              or a group and it uses the filter to be unregistered, the 
- *              function returns TRUE. 
- *
- * Return:      TRUE if the object uses the filter.
- *              FALSE otherwise.
+ * Function: H5Z__check_unregister_group_cb
  *
- * Programmer:  Raymond Lu
- *              6 May 2013
+ * Purpose:  The callback function for H5Z__unregister. It iterates
+ *           through all opened objects.  If the object is a dataset
+ *           or a group and it uses the filter to be unregistered, the
+ *           function returns TRUE.
  *
+ * Return:   TRUE if the object uses the filter.
+ *           FALSE otherwise.
  *-------------------------------------------------------------------------
  */
 static int
@@ -523,24 +493,24 @@ H5Z__check_unregister_group_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void
     HDassert(obj_ptr);
 
     /* Get the group creation property */
-    if((ocpl_id = H5G_get_create_plist((H5G_t *)obj_ptr)) < 0) 
+    if((ocpl_id = H5G_get_create_plist((H5G_t *)obj_ptr)) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get group creation property list")
 
     /* Check if the filter is in the group creation property list */
-    if((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0)
+    if ((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
 
     /* H5I_iterate expects TRUE to stop the loop over objects. Stop the loop and
-     * let H5Z_unregister return failure.
-     */ 
-    if(filter_in_pline) {
+     * let H5Z__unregister return failure.
+     */
+    if (filter_in_pline) {
         object->found = TRUE;
         ret_value = TRUE;
     } /* end if */
 
 done:
-    if(ocpl_id > 0)
-        if(H5I_dec_app_ref(ocpl_id) < 0)
+    if (ocpl_id > 0)
+        if (H5I_dec_app_ref(ocpl_id) < 0)
             HDONE_ERROR(H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -548,19 +518,15 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z__check_unregister_dset_cb
- *
- * Purpose:	The callback function for H5Z_unregister. It iterates 
- *              through all opened objects.  If the object is a dataset
- *              or a group and it uses the filter to be unregistered, the 
- *              function returns TRUE. 
+ * Function: H5Z__check_unregister_dset_cb
  *
- * Return:      TRUE if the object uses the filter.
- *              FALSE otherwise.
- *
- * Programmer:  Raymond Lu
- *              6 May 2013
+ * Purpose: The callback function for H5Z__unregister. It iterates
+ *          through all opened objects.  If the object is a dataset
+ *          or a group and it uses the filter to be unregistered, the
+ *          function returns TRUE.
  *
+ * Return:  TRUE if the object uses the filter.
+ *          FALSE otherwise.
  *-------------------------------------------------------------------------
  */
 static int
@@ -576,24 +542,24 @@ H5Z__check_unregister_dset_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void *
     HDassert(obj_ptr);
 
     /* Get the dataset creation property */
-    if((ocpl_id = H5D_get_create_plist((H5D_t *)obj_ptr)) < 0) 
+    if ((ocpl_id = H5D_get_create_plist((H5D_t *)obj_ptr)) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get dataset creation property list")
 
     /* Check if the filter is in the dataset creation property list */
-    if((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0)
+    if ((filter_in_pline = H5Z__check_unregister(ocpl_id, object->filter_id)) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't check filter in pipeline")
 
     /* H5I_iterate expects TRUE to stop the loop over objects. Stop the loop and
-     * let H5Z_unregister return failure.
-     */ 
-    if(filter_in_pline) {
+     * let H5Z__unregister return failure.
+     */
+    if (filter_in_pline) {
         object->found = TRUE;
         ret_value = TRUE;
     } /* end if */
 
 done:
-    if(ocpl_id > 0)
-        if(H5I_dec_app_ref(ocpl_id) < 0)
+    if (ocpl_id > 0)
+        if (H5I_dec_app_ref(ocpl_id) < 0)
             HDONE_ERROR(H5E_PLINE, H5E_CANTDEC, FAIL, "can't release plist")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -601,32 +567,68 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z__flush_file_cb
+ * Function: H5Z__flush_file_cb
  *
- * Purpose:	The callback function for H5Z_unregister. It iterates 
- *              through all opened files and flush them. 
- *
- * Return:      FALSE if finishes flushing and moves on
- *              FAIL if there is an error
- *
- * Programmer:  Raymond Lu
- *              6 May 2013
+ * Purpose:  The callback function for H5Z__unregister. It iterates
+ *           through all opened files and flush them.
  *
+ * Return:   FALSE if finishes flushing and moves on
+ *           FAIL if there is an error
  *-------------------------------------------------------------------------
  */
 static int
-H5Z__flush_file_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void H5_ATTR_UNUSED *key)
+H5Z__flush_file_cb(void *obj_ptr, hid_t H5_ATTR_UNUSED obj_id, void *key)
 {
-    int             ret_value = FALSE;    /* Return value */
+    H5F_t *f = (H5F_t *)obj_ptr;        /* File object for operations */
+    H5Z_object_t    *object = (H5Z_object_t *)key;
+    int    ret_value = FALSE;    /* Return value */
 
     FUNC_ENTER_STATIC
 
-    HDassert(obj_ptr);
+    /* Sanity checks */
+    HDassert(f);
+    HDassert(object);
+
+    /* Do a global flush if the file is opened for write */
+    if(H5F_ACC_RDWR & H5F_INTENT(f)) {
+
+/* When parallel HDF5 is defined, check for collective metadata reads on this
+ *      file and set the flag for metadata I/O in the API context.  -QAK, 2018/02/14
+ */
+#ifdef H5_HAVE_PARALLEL
+        /* Check if MPIO driver is used */
+        if(H5F_HAS_FEATURE(f, H5FD_FEAT_HAS_MPI)) {
+            H5P_coll_md_read_flag_t coll_md_read;  /* Do all metadata reads collectively */
+
+            /* Sanity check for collectively calling H5Zunregister, if requested */
+            /* (Sanity check assumes that a barrier on one file's comm
+             *  is sufficient (i.e. that there aren't different comms for
+             *  different files).  -QAK, 2018/02/14
+             */
+            if(H5_coll_api_sanity_check_g && !object->sanity_checked) {
+                MPI_Comm mpi_comm;      /* File's communicator */
+
+                /* Retrieve the file communicator */
+                if(MPI_COMM_NULL == (mpi_comm = H5F_mpi_get_comm(f)))
+                    HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get MPI communicator")
+
+                /* Issue the barrier */
+                if(mpi_comm != MPI_COMM_NULL)
+                    MPI_Barrier(mpi_comm);
+
+                /* Set the "sanity checked" flag */
+                object->sanity_checked = TRUE;
+            } /* end if */
 
-    /* Call the flush routine for mounted file hierarchies. Do a global flush 
-     * if the file is opened for write */
-    if(H5F_ACC_RDWR & H5F_INTENT((H5F_t *)obj_ptr)) {
-        if(H5F_flush_mounts((H5F_t *)obj_ptr, H5AC_ind_read_dxpl_id, H5AC_rawdata_dxpl_id) < 0)
+            /* Check whether to use the collective metadata read DXPL */
+            coll_md_read = H5F_COLL_MD_READ(f);
+            if(H5P_USER_TRUE == coll_md_read)
+                H5CX_set_coll_metadata_read(TRUE);
+        } /* end if */
+#endif /* H5_HAVE_PARALLEL */
+
+        /* Call the flush routine for mounted file hierarchies */
+        if(H5F_flush_mounts((H5F_t *)obj_ptr) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTFLUSH, FAIL, "unable to flush file hierarchy")
     } /* end if */
 
@@ -636,39 +638,27 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Zfilter_avail
- *
- * Purpose:	Check if a filter is available
- *
- * Return:	Non-negative (TRUE/FALSE) on success/Negative on failure
+ * Function: H5Zfilter_avail
  *
- * Programmer:	Quincey Koziol
- *              Thursday, November 14, 2002
- *
- * Modifications:
+ * Purpose:  Check if a filter is available
  *
+ * Return:   Non-negative (TRUE/FALSE) on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Zfilter_avail(H5Z_filter_t id)
 {
-    htri_t ret_value=FALSE;     /* Return value */
+    htri_t    ret_value = FALSE;     /* Return value */
 
     FUNC_ENTER_API(FAIL)
     H5TRACE1("t", "Zf", id);
 
     /* Check args */
-    if(id<0 || id>H5Z_FILTER_MAX)
-        HGOTO_ERROR (H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
- 
-    if((ret_value = H5Z_filter_avail(id)) < 0)
-    	HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "unable to check the availability of the filter")
-    else if(ret_value == FALSE) {
-        const H5Z_class2_t *filter_info;
-
-        if(NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, (int)id)))
-        	ret_value = TRUE;
-    } /* end if */
+    if (id < 0 || id > H5Z_FILTER_MAX)
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "invalid filter identification number")
+
+    if ((ret_value = H5Z_filter_avail(id)) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "unable to check the availability of the filter")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -676,29 +666,34 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_filter_avail
- *
- * Purpose:	Private function to check if a filter is available
+ * Function: H5Z_filter_avail
  *
- * Return:	Non-negative (TRUE/FALSE) on success/Negative on failure
- *
- * Programmer:	Raymond Lu
- *              13 February 2013
+ * Purpose:  Private function to check if a filter is available
  *
+ * Return:   Non-negative (TRUE/FALSE) on success/Negative on failure
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Z_filter_avail(H5Z_filter_t id)
 {
-    size_t i;                   /* Local index variable */
-    htri_t ret_value = FALSE;   /* Return value */
+    H5PL_key_t          key;                /* Key for finding a plugin     */
+    const H5Z_class2_t *filter_info;        /* Filter information           */
+    size_t              i;                  /* Local index variable         */
+    htri_t              ret_value = FALSE;  /* Return value                 */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Is the filter already registered? */
-    for(i = 0; i < H5Z_table_used_g; i++)
-	if(H5Z_table_g[i].id == id)
-	    HGOTO_DONE(TRUE)
+    for (i = 0; i < H5Z_table_used_g; i++)
+        if (H5Z_table_g[i].id == id)
+            HGOTO_DONE(TRUE)
+
+    key.id = (int)id;
+    if (NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, key))) {
+        if (H5Z_register(filter_info) < 0)
+            HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register loaded filter")
+        HGOTO_DONE(TRUE)
+    }
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -706,21 +701,16 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_prelude_callback
- *
- * Purpose:	Makes a dataset creation "prelude" callback for the "can_apply"
- *              or "set_local" routines.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5Z_prelude_callback
  *
- * Programmer:	Quincey Koziol
- *              Friday, April 4, 2003
+ * Purpose:  Makes a dataset creation "prelude" callback for the "can_apply"
+ *           or "set_local" routines.
  *
- * Notes:
- *              The chunk dimensions are used to create a dataspace, instead
- *              of passing in the dataset's dataspace, since the chunk
- *              dimensions are what the I/O filter will actually see
+ * Return:   Non-negative on success/Negative on failure
  *
+ * Notes:    The chunk dimensions are used to create a dataspace, instead
+ *           of passing in the dataset's dataspace, since the chunk
+ *           dimensions are what the I/O filter will actually see
  *-------------------------------------------------------------------------
  */
 static herr_t
@@ -729,52 +719,52 @@ H5Z_prelude_callback(const H5O_pline_t *pline, hid_t dcpl_id, hid_t type_id,
 {
     H5Z_class2_t    *fclass;                /* Individual filter information */
     size_t          u;                      /* Local index variable */
-    htri_t          ret_value = TRUE;    /* Return value */
+    htri_t          ret_value = TRUE;       /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
     HDassert(pline->nused > 0);
 
     /* Iterate over filters */
-    for(u = 0; u < pline->nused; u++) {
+    for (u = 0; u < pline->nused; u++) {
         /* Get filter information */
-        if(NULL == (fclass = H5Z_find(pline->filter[u].id))) {
+        if (NULL == (fclass = H5Z_find(pline->filter[u].id))) {
             /* Ignore errors from optional filters */
-            if(pline->filter[u].flags & H5Z_FLAG_OPTIONAL)
-                H5E_clear_stack(NULL);
+            if (pline->filter[u].flags & H5Z_FLAG_OPTIONAL)
+                H5E_clear_stack (NULL);
             else
                 HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "required filter was not located")
         } /* end if */
         else {
             /* Make correct callback */
-            switch(prelude_type) {
+            switch (prelude_type) {
                 case H5Z_PRELUDE_CAN_APPLY:
                     /* Check if filter is configured to be able to encode */
-                    if(!fclass->encoder_present)
+                    if (!fclass->encoder_present)
                         HGOTO_ERROR(H5E_PLINE, H5E_NOENCODER, FAIL, "Filter present but encoding is disabled.");
 
 
                     /* Check if there is a "can apply" callback */
-                    if(fclass->can_apply) {
+                    if (fclass->can_apply) {
                         /* Make callback to filter's "can apply" function */
                         htri_t status = (fclass->can_apply)(dcpl_id, type_id, space_id);
 
                         /* Indicate error during filter callback */
-                        if(status < 0)
+                        if (status < 0)
                             HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "error during user callback")
 
-                        /* Indicate filter can't apply to this combination of parameters.  
+                        /* Indicate filter can't apply to this combination of parameters.
                          * If the filter is NOT optional, returns failure. */
-                        if(status == FALSE && !(pline->filter[u].flags & H5Z_FLAG_OPTIONAL))
+                        if (status == FALSE && !(pline->filter[u].flags & H5Z_FLAG_OPTIONAL))
                             HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "filter parameters not appropriate")
                     } /* end if */
                     break;
 
                 case H5Z_PRELUDE_SET_LOCAL:
                     /* Check if there is a "set local" callback */
-                    if(fclass->set_local) {
+                    if (fclass->set_local) {
                         /* Make callback to filter's "set local" function */
-                        if((fclass->set_local)(dcpl_id, type_id, space_id) < 0)
+                        if ((fclass->set_local)(dcpl_id, type_id, space_id) < 0)
                             /* Indicate error during filter callback */
                             HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "error during user callback")
                     } /* end if */
@@ -793,28 +783,24 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_prepare_prelude_callback_dcpl
+ * Function: H5Z_prepare_prelude_callback_dcpl
  *
- * Purpose:	Prepares to make a dataset creation "prelude" callback
- *              for the "can_apply" or "set_local" routines.
+ * Purpose:  Prepares to make a dataset creation "prelude" callback
+ *           for the "can_apply" or "set_local" routines.
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Friday, April 4, 2003
- *
- * Notes:
- *              The chunk dimensions are used to create a dataspace, instead
- *              of passing in the dataset's dataspace, since the chunk
- *              dimensions are what the I/O filter will actually see
+ * Return:   Non-negative on success/Negative on failure
  *
+ * Notes:    The chunk dimensions are used to create a dataspace, instead
+ *           of passing in the dataset's dataspace, since the chunk
+ *           dimensions are what the I/O filter will actually see
  *-------------------------------------------------------------------------
  */
 static herr_t
 H5Z_prepare_prelude_callback_dcpl(hid_t dcpl_id, hid_t type_id, H5Z_prelude_type_t prelude_type)
 {
-    hid_t space_id = -1;            /* ID for dataspace describing chunk */
-    herr_t ret_value = SUCCEED;     /* Return value */
+    hid_t   space_id = -1;            /* ID for dataspace describing chunk */
+    H5O_layout_t *dcpl_layout = NULL; /* Dataset's layout information */
+    herr_t  ret_value = SUCCEED;      /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
@@ -822,76 +808,78 @@ H5Z_prepare_prelude_callback_dcpl(hid_t dcpl_id, hid_t type_id, H5Z_prelude_type
     HDassert(H5I_DATATYPE == H5I_get_type(type_id));
 
     /* Check if the property list is non-default */
-    if(dcpl_id != H5P_DATASET_CREATE_DEFAULT) {
-        H5P_genplist_t 	*dc_plist;      /* Dataset creation property list object */
-        H5O_layout_t    dcpl_layout;    /* Dataset's layout information */
+    if (dcpl_id != H5P_DATASET_CREATE_DEFAULT) {
+        H5P_genplist_t     *dc_plist;           /* Dataset creation property list object */
+
+        /* Get memory for the layout */
+        if (NULL == (dcpl_layout = (H5O_layout_t *)H5MM_calloc(sizeof(H5O_layout_t))))
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "unable to allocate dcpl layout buffer")
 
         /* Get dataset creation property list object */
-        if(NULL == (dc_plist = (H5P_genplist_t *)H5I_object(dcpl_id)))
-            HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "can't get dataset creation property list")
+        if (NULL == (dc_plist = (H5P_genplist_t *)H5I_object(dcpl_id)))
+            HGOTO_ERROR (H5E_ARGS, H5E_BADTYPE, FAIL, "can't get dataset creation property list")
 
         /* Peek at the layout information */
-        if(H5P_peek(dc_plist, H5D_CRT_LAYOUT_NAME, &dcpl_layout) < 0)
-            HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve layout")
+        if (H5P_peek(dc_plist, H5D_CRT_LAYOUT_NAME, dcpl_layout) < 0)
+            HGOTO_ERROR (H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve layout")
 
         /* Check if the dataset is chunked */
-        if(H5D_CHUNKED == dcpl_layout.type) {
+        if (H5D_CHUNKED == dcpl_layout->type) {
             H5O_pline_t     dcpl_pline;     /* Object's I/O pipeline information */
 
             /* Get I/O pipeline information */
-            if(H5P_peek(dc_plist, H5O_CRT_PIPELINE_NAME, &dcpl_pline) < 0)
-                HGOTO_ERROR(H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve pipeline filter")
+            if (H5P_peek(dc_plist, H5O_CRT_PIPELINE_NAME, &dcpl_pline) < 0)
+                HGOTO_ERROR (H5E_PLIST, H5E_CANTGET, FAIL, "can't retrieve pipeline filter")
 
             /* Check if the chunks have filters */
-            if(dcpl_pline.nused > 0) {
+            if (dcpl_pline.nused > 0) {
                 hsize_t chunk_dims[H5O_LAYOUT_NDIMS];      /* Size of chunk dimensions */
-                H5S_t *space;           /* Dataspace describing chunk */
-                size_t u;               /* Local index variable */
+                H5S_t  *space;           /* Dataspace describing chunk */
+                size_t  u;               /* Local index variable */
 
                 /* Create a dataspace for a chunk & set the extent */
-                for(u = 0; u < dcpl_layout.u.chunk.ndims; u++)
-                    chunk_dims[u] = dcpl_layout.u.chunk.dim[u];
-                if(NULL == (space = H5S_create_simple(dcpl_layout.u.chunk.ndims, chunk_dims, NULL)))
+                for(u = 0; u < dcpl_layout->u.chunk.ndims; u++)
+                    chunk_dims[u] = dcpl_layout->u.chunk.dim[u];
+                if(NULL == (space = H5S_create_simple(dcpl_layout->u.chunk.ndims, chunk_dims, NULL)))
                     HGOTO_ERROR(H5E_DATASPACE, H5E_CANTCREATE, FAIL, "can't create simple dataspace")
 
                 /* Get ID for dataspace to pass to filter routines */
-                if((space_id = H5I_register(H5I_DATASPACE, space, FALSE)) < 0) {
+                if ((space_id = H5I_register(H5I_DATASPACE, space, FALSE)) < 0) {
                     (void)H5S_close(space);
-                    HGOTO_ERROR(H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace ID")
-                } /* end if */
+                    HGOTO_ERROR (H5E_ATOM, H5E_CANTREGISTER, FAIL, "unable to register dataspace ID")
+                }
 
                 /* Make the callbacks */
-                if(H5Z_prelude_callback(&dcpl_pline, dcpl_id, type_id, space_id, prelude_type) < 0)
-                    HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
-            } /* end if */
-        } /* end if */
-    } /* end if */
+                if (H5Z_prelude_callback(&dcpl_pline, dcpl_id, type_id, space_id, prelude_type) < 0)
+                    HGOTO_ERROR (H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
+            }
+        }
+    }
 
 done:
-    if(space_id > 0 && H5I_dec_ref(space_id) < 0)
+    if (space_id > 0 && H5I_dec_ref(space_id) < 0)
         HDONE_ERROR(H5E_PLINE, H5E_CANTRELEASE, FAIL, "unable to close dataspace")
 
+    if (dcpl_layout)
+        dcpl_layout = (H5O_layout_t *)H5MM_xfree(dcpl_layout);
+
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z_prepare_prelude_callback_dcpl() */
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_can_apply
- *
- * Purpose:	Checks if all the filters defined in the dataset creation
- *              property list can be applied to a particular combination of
- *              datatype and dataspace for a dataset.
- *
- * Return:	Non-negative on success/Negative on failure
+ * Function: H5Z_can_apply
  *
- * Programmer:	Quincey Koziol
- *              Thursday, April 3, 2003
+ * Purpose:  Checks if all the filters defined in the dataset creation
+ *           property list can be applied to a particular combination of
+ *           datatype and dataspace for a dataset.
  *
- * Notes:
- *              The chunk dimensions are used to create a dataspace, instead
- *              of passing in the dataset's dataspace, since the chunk
- *              dimensions are what the I/O filter will actually see
+ * Return:   Non-negative on success
+ *           Negative on failure
  *
+ * Notes:    The chunk dimensions are used to create a dataspace, instead
+ *           of passing in the dataset's dataspace, since the chunk
+ *           dimensions are what the I/O filter will actually see
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -902,7 +890,7 @@ H5Z_can_apply(hid_t dcpl_id, hid_t type_id)
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Make "can apply" callbacks for filters in pipeline */
-    if(H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_CAN_APPLY) < 0)
+    if (H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_CAN_APPLY) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
 
 done:
@@ -911,22 +899,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_set_local
+ * Function: H5Z_set_local
  *
- * Purpose:	Makes callbacks to modify dataset creation list property
- *              settings for filters on a new dataset, based on the datatype
- *              and dataspace of that dataset (chunk).
+ * Purpose:  Makes callbacks to modify dataset creation list property
+ *           settings for filters on a new dataset, based on the datatype
+ *           and dataspace of that dataset (chunk).
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Friday, April 4, 2003
- *
- * Notes:
- *              The chunk dimensions are used to create a dataspace, instead
- *              of passing in the dataset's dataspace, since the chunk
- *              dimensions are what the I/O filter will actually see
+ * Return:   Non-negative on success
+ *           Negative on failure
  *
+ * Notes:    The chunk dimensions are used to create a dataspace, instead
+ *           of passing in the dataset's dataspace, since the chunk
+ *           dimensions are what the I/O filter will actually see
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -937,7 +921,7 @@ H5Z_set_local(hid_t dcpl_id, hid_t type_id)
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Make "set local" callbacks for filters in pipeline */
-    if(H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_SET_LOCAL) < 0)
+    if (H5Z_prepare_prelude_callback_dcpl(dcpl_id, type_id, H5Z_PRELUDE_SET_LOCAL) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set")
 
 done:
@@ -946,17 +930,14 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_can_apply_direct
- *
- * Purpose:	Checks if all the filters defined in the pipeline can be
- *              applied to an opaque byte stream (currently only a group).
- *              The pipeline is assumed to have at least one filter.
+ * Function: H5Z_can_apply_direct
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Neil Fortner
- *              Tuesday, September 22, 2009
+ * Purpose:  Checks if all the filters defined in the pipeline can be
+ *           applied to an opaque byte stream (currently only a group).
+ *           The pipeline is assumed to have at least one filter.
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -969,7 +950,7 @@ H5Z_can_apply_direct(const H5O_pline_t *pline)
     HDassert(pline->nused > 0);
 
     /* Make "can apply" callbacks for filters in pipeline */
-    if(H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_CAN_APPLY) < 0)
+    if (H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_CAN_APPLY) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_CANAPPLY, FAIL, "unable to apply filter")
 
 done:
@@ -978,22 +959,18 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_set_local_direct
- *
- * Purpose:	Makes callbacks to modify local settings for filters on a
- *              new opaque object.  The pipeline is assumed to have at
- *              least one filter.
+ * Function: H5Z_set_local_direct
  *
- * Return:	Non-negative on success/Negative on failure
+ * Purpose:  Makes callbacks to modify local settings for filters on a
+ *           new opaque object.  The pipeline is assumed to have at
+ *           least one filter.
  *
- * Programmer:	Neil Fortner
- *              Tuesday, September 22, 2009
- *
- * Notes:
- *              This callback will almost certainly not do anything
- *              useful, other than to make certain that the filter will
- *              accept opque data.
+ * Return:   Non-negative on success
+ *           Negative on failure
  *
+ * Notes:    This callback will almost certainly not do anything
+ *           useful, other than to make certain that the filter will
+ *           accept opaque data.
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1006,7 +983,7 @@ H5Z_set_local_direct(const H5O_pline_t *pline)
     HDassert(pline->nused > 0);
 
     /* Make "set local" callbacks for filters in pipeline */
-    if(H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_SET_LOCAL) < 0)
+    if (H5Z_prelude_callback(pline, (hid_t)-1, (hid_t)-1, (hid_t)-1, H5Z_PRELUDE_SET_LOCAL) < 0)
         HGOTO_ERROR(H5E_PLINE, H5E_SETLOCAL, FAIL, "local filter parameters not set")
 
 done:
@@ -1015,25 +992,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_modify
- *
- * Purpose:	Modify filter parameters for specified pipeline.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Friday, April  5, 2003
+ * Function: H5Z_modify
  *
- * Modifications:
+ * Purpose:  Modify filter parameters for specified pipeline.
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Z_modify(const H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
-	   size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
+        size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
 {
-    size_t	idx;                    /* Index of filter in pipeline */
-    herr_t      ret_value = SUCCEED;      /* Return value */
+    size_t      idx;                    /* Index of filter in pipeline */
+    herr_t      ret_value = SUCCEED;    /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -1043,38 +1015,38 @@ H5Z_modify(const H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
     HDassert(0 == cd_nelmts || cd_values);
 
     /* Locate the filter in the pipeline */
-    for(idx = 0; idx < pline->nused; idx++)
-        if(pline->filter[idx].id == filter)
+    for (idx = 0; idx < pline->nused; idx++)
+        if (pline->filter[idx].id == filter)
             break;
 
     /* Check if the filter was not already in the pipeline */
-    if(idx > pline->nused)
-	HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline")
+    if (idx > pline->nused)
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline")
 
     /* Change parameters for filter */
     pline->filter[idx].flags = flags;
     pline->filter[idx].cd_nelmts = cd_nelmts;
 
     /* Free any existing parameters */
-    if(pline->filter[idx].cd_values != NULL && pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
-	H5MM_xfree(pline->filter[idx].cd_values);
+    if (pline->filter[idx].cd_values != NULL && pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
+        H5MM_xfree(pline->filter[idx].cd_values);
 
     /* Set parameters */
-    if(cd_nelmts > 0) {
-        size_t	i;                      /* Local index variable */
+    if (cd_nelmts > 0) {
+        size_t    i;                      /* Local index variable */
 
         /* Allocate memory or point at internal buffer */
-        if(cd_nelmts > H5Z_COMMON_CD_VALUES) {
+        if (cd_nelmts > H5Z_COMMON_CD_VALUES) {
             pline->filter[idx].cd_values = (unsigned *)H5MM_malloc(cd_nelmts * sizeof(unsigned));
-            if(NULL == pline->filter[idx].cd_values)
+            if (NULL == pline->filter[idx].cd_values)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter parameters")
         } /* end if */
         else
             pline->filter[idx].cd_values = pline->filter[idx]._cd_values;
 
         /* Copy client data values */
-	for(i = 0; i < cd_nelmts; i++)
-	    pline->filter[idx].cd_values[i] = cd_values[i];
+        for (i = 0; i < cd_nelmts; i++)
+            pline->filter[idx].cd_values[i] = cd_values[i];
     } /* end if */
     else
        pline->filter[idx].cd_values = NULL;
@@ -1085,25 +1057,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_append
+ * Function: H5Z_append
  *
- * Purpose:	Append another filter to the specified pipeline.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Tuesday, August  4, 1998
- *
- * Modifications:
+ * Purpose:  Append another filter to the specified pipeline.
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
-	   size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
+        size_t cd_nelmts, const unsigned int cd_values[/*cd_nelmts*/])
 {
-    size_t	idx;
-    herr_t      ret_value = SUCCEED;       /* Return value */
+    size_t    idx;
+    herr_t    ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -1116,16 +1083,16 @@ H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
      * Check filter limit.  We do it here for early warnings although we may
      * decide to relax this restriction in the future.
      */
-    if(pline->nused >= H5Z_MAX_NFILTERS)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "too many filters in pipeline")
+    if (pline->nused >= H5Z_MAX_NFILTERS)
+        HGOTO_ERROR (H5E_PLINE, H5E_CANTINIT, FAIL, "too many filters in pipeline")
 
     /* Check for freshly allocated filter pipeline */
-    if(pline->version == 0)
+    if (pline->version == 0)
         pline->version = H5O_PLINE_VERSION_1;
 
     /* Allocate additional space in the pipeline if it's full */
-    if(pline->nused >= pline->nalloc) {
-	H5O_pline_t x;
+    if (pline->nused >= pline->nalloc) {
+        H5O_pline_t x;
         size_t n;
 
         /* Each filter's data may be stored internally or may be
@@ -1135,25 +1102,25 @@ H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
          * filter struct is reallocated.  Set these pointers to ~NULL
          * so that we can reset them after reallocating the filters array.
          */
-        for(n = 0; n < pline->nalloc; ++n)
-            if(pline->filter[n].cd_values == pline->filter[n]._cd_values)
+        for (n = 0; n < pline->nalloc; ++n)
+            if (pline->filter[n].cd_values == pline->filter[n]._cd_values)
                 pline->filter[n].cd_values = (unsigned *)((void *) ~((size_t)NULL));
 
-	x.nalloc = MAX(H5Z_MAX_NFILTERS, 2 * pline->nalloc);
-	x.filter = (H5Z_filter_info_t *)H5MM_realloc(pline->filter, x.nalloc * sizeof(x.filter[0]));
-	if(NULL == x.filter)
-	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter pipeline")
+        x.nalloc = MAX(H5Z_MAX_NFILTERS, 2 * pline->nalloc);
+        x.filter = (H5Z_filter_info_t *)H5MM_realloc(pline->filter, x.nalloc * sizeof(x.filter[0]));
+        if (NULL == x.filter)
+            HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter pipeline")
 
         /* Fix pointers in previous filters that need to point to their own
          *      internal data.
          */
-        for(n = 0; n < pline->nalloc; ++n)
-            if(x.filter[n].cd_values == (void *) ~((size_t) NULL))
+        for (n = 0; n < pline->nalloc; ++n)
+            if (x.filter[n].cd_values == (void *) ~((size_t) NULL))
                 x.filter[n].cd_values = x.filter[n]._cd_values;
 
         /* Point to newly allocated buffer */
-	pline->nalloc = x.nalloc;
-	pline->filter = x.filter;
+        pline->nalloc = x.nalloc;
+        pline->filter = x.filter;
     } /* end if */
 
     /* Add the new filter to the pipeline */
@@ -1162,21 +1129,21 @@ H5Z_append(H5O_pline_t *pline, H5Z_filter_t filter, unsigned flags,
     pline->filter[idx].flags = flags;
     pline->filter[idx].name = NULL; /*we'll pick it up later*/
     pline->filter[idx].cd_nelmts = cd_nelmts;
-    if(cd_nelmts > 0) {
-        size_t	i;                      /* Local index variable */
+    if (cd_nelmts > 0) {
+        size_t    i;                      /* Local index variable */
 
         /* Allocate memory or point at internal buffer */
-        if(cd_nelmts > H5Z_COMMON_CD_VALUES) {
+        if (cd_nelmts > H5Z_COMMON_CD_VALUES) {
             pline->filter[idx].cd_values = (unsigned *)H5MM_malloc(cd_nelmts * sizeof(unsigned));
-            if(NULL == pline->filter[idx].cd_values)
+            if (NULL == pline->filter[idx].cd_values)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for filter")
         } /* end if */
         else
             pline->filter[idx].cd_values = pline->filter[idx]._cd_values;
 
         /* Copy client data values */
-	for(i = 0; i < cd_nelmts; i++)
-	    pline->filter[idx].cd_values[i] = cd_values[i];
+        for (i = 0; i < cd_nelmts; i++)
+            pline->filter[idx].cd_values[i] = cd_values[i];
     } /* end if */
     else
        pline->filter[idx].cd_values = NULL;
@@ -1189,32 +1156,26 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_find_idx
+ * Function: H5Z_find_idx
  *
- * Purpose:	Given a filter ID return the offset in the global array
- *              that holds all the registered filters.
- *
- * Return:	Success:	Non-negative index of entry in global filter table.
- *		Failure:	Negative
- *
- * Programmer:	Quincey Koziol
- *              Friday, April  5, 2003
- *
- * Modifications:
+ * Purpose:  Given a filter ID return the offset in the global array
+ *           that holds all the registered filters.
  *
+ * Return:   Success:    Non-negative index of entry in global filter table.
+ *           Failure:    Negative
  *-------------------------------------------------------------------------
  */
 static int
 H5Z_find_idx(H5Z_filter_t id)
 {
     size_t i;                   /* Local index variable */
-    int ret_value=FAIL;         /* Return value */
+    int    ret_value = FAIL;    /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
-    for (i=0; i<H5Z_table_used_g; i++)
-	if (H5Z_table_g[i].id == id)
-	    HGOTO_DONE((int)i)
+    for (i = 0; i < H5Z_table_used_g; i++)
+        if (H5Z_table_g[i].id == id)
+            HGOTO_DONE((int)i)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1222,37 +1183,29 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_find
- *
- * Purpose:	Given a filter ID return a pointer to a global struct that
- *		defines the filter.
+ * Function: H5Z_find
  *
- * Return:	Success:	Ptr to entry in global filter table.
- *		Failure:	NULL
- *
- * Programmer:	Robb Matzke
- *              Wednesday, August  5, 1998
- *
- * Modifications:
- *              Use H5Z_find_idx now
- *              Quincey Koziol, April  5, 2003
+ * Purpose:  Given a filter ID return a pointer to a global struct that
+ *           defines the filter.
  *
+ * Return:   Success:    Ptr to entry in global filter table.
+ *           Failure:    NULL
  *-------------------------------------------------------------------------
  */
 H5Z_class2_t *
 H5Z_find(H5Z_filter_t id)
 {
-    int	idx;                            /* Filter index in global table */
-    H5Z_class2_t *ret_value=NULL;        /* Return value */
+    int           idx;                     /* Filter index in global table */
+    H5Z_class2_t *ret_value = NULL;        /* Return value */
 
     FUNC_ENTER_NOAPI(NULL)
 
     /* Get the index in the global table */
-    if((idx=H5Z_find_idx(id))<0)
-        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "required filter is not registered")
+    if ((idx = H5Z_find_idx(id)) < 0)
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "required filter %d is not registered", id)
 
     /* Set return value */
-    ret_value=H5Z_table_g+idx;
+    ret_value = H5Z_table_g + idx;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1260,170 +1213,168 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_pipeline
- *
- * Purpose:	Process data through the filter pipeline.  The FLAGS argument
- *		is the filter invocation flags (definition flags come from
- *		the PLINE->filter[].flags).  The filters are processed in
- *		definition order unless the H5Z_FLAG_REVERSE is set.  The
- *		FILTER_MASK is a bit-mask to indicate which filters to skip
- *		and on exit will indicate which filters failed.  Each
- *		filter has an index number in the pipeline and that index
- *		number is the filter's bit in the FILTER_MASK.  NBYTES is the
- *		number of bytes of data to filter and on exit should be the
- *		number of resulting bytes while BUF_SIZE holds the total
- *		allocated size of the buffer, which is pointed to BUF.
- *
- *		If the buffer must grow during processing of the pipeline
- *		then the pipeline function should free the original buffer
- *		and return a fresh buffer, adjusting BUF_SIZE accordingly.
- *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Robb Matzke
- *              Tuesday, August  4, 1998
- *
- * Modifications:
- *
+ * Function: H5Z_pipeline
+ *
+ * Purpose:  Process data through the filter pipeline.  The FLAGS argument
+ *           is the filter invocation flags (definition flags come from
+ *           the PLINE->filter[].flags).  The filters are processed in
+ *           definition order unless the H5Z_FLAG_REVERSE is set.  The
+ *           FILTER_MASK is a bit-mask to indicate which filters to skip
+ *           and on exit will indicate which filters failed.  Each
+ *           filter has an index number in the pipeline and that index
+ *           number is the filter's bit in the FILTER_MASK.  NBYTES is the
+ *           number of bytes of data to filter and on exit should be the
+ *           number of resulting bytes while BUF_SIZE holds the total
+ *           allocated size of the buffer, which is pointed to BUF.
+ *
+ *           If the buffer must grow during processing of the pipeline
+ *           then the pipeline function should free the original buffer
+ *           and return a fresh buffer, adjusting BUF_SIZE accordingly.
+ *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Z_pipeline(const H5O_pline_t *pline, unsigned flags,
- 	     unsigned *filter_mask/*in,out*/, H5Z_EDC_t edc_read,
-             H5Z_cb_t cb_struct, size_t *nbytes/*in,out*/,
-             size_t *buf_size/*in,out*/, void **buf/*in,out*/)
+        unsigned *filter_mask/*in,out*/, H5Z_EDC_t edc_read,
+        H5Z_cb_t cb_struct, size_t *nbytes/*in,out*/,
+        size_t *buf_size/*in,out*/, void **buf/*in,out*/)
 {
-    size_t	i, idx, new_nbytes;
-    int fclass_idx;             /* Index of filter class in global table */
-    H5Z_class2_t	*fclass=NULL;   /* Filter class pointer */
+    size_t    i, idx, new_nbytes;
+    int       fclass_idx;        /* Index of filter class in global table */
+    H5Z_class2_t *fclass=NULL;   /* Filter class pointer */
 #ifdef H5Z_DEBUG
-    H5Z_stats_t	*fstats=NULL;   /* Filter stats pointer */
-    H5_timer_t	timer;
+    H5Z_stats_t  *fstats=NULL;   /* Filter stats pointer */
+    H5_timer_t    timer;
 #endif
-    unsigned	failed = 0;
-    unsigned	tmp_flags;
-    herr_t      ret_value=SUCCEED;       /* Return value */
+    unsigned    failed = 0;
+    unsigned    tmp_flags;
+    herr_t      ret_value = SUCCEED;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
-    HDassert(0==(flags & ~((unsigned)H5Z_FLAG_INVMASK)));
+    HDassert(0 == (flags & ~((unsigned)H5Z_FLAG_INVMASK)));
     HDassert(filter_mask);
     HDassert(nbytes && *nbytes>0);
     HDassert(buf_size && *buf_size>0);
     HDassert(buf && *buf);
-    HDassert(!pline || pline->nused<H5Z_MAX_NFILTERS);
+    HDassert(!pline || pline->nused < H5Z_MAX_NFILTERS);
 
     if (pline && (flags & H5Z_FLAG_REVERSE)) { /* Read */
-	for (i=pline->nused; i>0; --i) {
-	    idx = i-1;
+        for (i = pline->nused; i > 0; --i) {
+            idx = i-1;
 
-	    if (*filter_mask & ((unsigned)1<<idx)) {
-		failed |= (unsigned)1 << idx;
-		continue;/*filter excluded*/
-	    }
+            if (*filter_mask & ((unsigned)1 << idx)) {
+                failed |= (unsigned)1 << idx;
+                continue;   /* filter excluded */
+            }
 
-            /* If the filter isn't registered and the application doesn't 
-             * indicate no plugin through HDF5_PRELOAD_PLUG (using the symbol "::"), 
+            /* If the filter isn't registered and the application doesn't
+             * indicate no plugin through HDF5_PRELOAD_PLUG (using the symbol "::"),
              * try to load it dynamically and register it.  Otherwise, return failure
              */
-	    if((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0) {
+            if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0) {
                 hbool_t issue_error = FALSE;
-				const H5Z_class2_t    *filter_info;
-
-				/* Try loading the filter */
-				if(NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, (int)(pline->filter[idx].id)))) {
-					/* Register the filter we loaded */
-					if(H5Z_register(filter_info) < 0)
-						HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
-
-					/* Search in the table of registered filters again to find the dynamic filter just loaded and registered */
-					if((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0)
-						issue_error = TRUE;
-				} /* end if */
-				else
-					issue_error = TRUE;
+                H5PL_key_t key;
+                const H5Z_class2_t    *filter_info;
+
+                /* Try loading the filter */
+                key.id = (int)(pline->filter[idx].id);
+                if(NULL != (filter_info = (const H5Z_class2_t *)H5PL_load(H5PL_TYPE_FILTER, key))) {
+                    /* Register the filter we loaded */
+                    if(H5Z_register(filter_info) < 0)
+                        HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, FAIL, "unable to register filter")
+
+                    /* Search in the table of registered filters again to find the dynamic filter just loaded and registered */
+                    if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0)
+                        issue_error = TRUE;
+                }
+                else
+                    issue_error = TRUE;
 
                 /* Check for error */
-                if(issue_error) {
-                    /* Print out the filter name to give more info.  But the name is optional for 
+                if (issue_error) {
+                    /* Print out the filter name to give more info.  But the name is optional for
                      * the filter */
-                    if(pline->filter[idx].name)
+                    if (pline->filter[idx].name)
                         HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "required filter '%s' is not registered", pline->filter[idx].name)
                     else
                         HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "required filter (name unavailable) is not registered")
-                } /* end if */
+                }
             } /* end if */
 
-            fclass=&H5Z_table_g[fclass_idx];
+            fclass = &H5Z_table_g[fclass_idx];
 #ifdef H5Z_DEBUG
-            fstats=&H5Z_stat_table_g[fclass_idx];
-	    H5_timer_begin(&timer);
+            fstats = &H5Z_stat_table_g[fclass_idx];
+            H5_timer_begin (&timer);
 #endif
-            tmp_flags=flags|(pline->filter[idx].flags);
-            tmp_flags|=(edc_read== H5Z_DISABLE_EDC) ? H5Z_FLAG_SKIP_EDC : 0;
-	    new_nbytes = (fclass->filter)(tmp_flags, pline->filter[idx].cd_nelmts,
+            tmp_flags = flags | (pline->filter[idx].flags);
+            tmp_flags |= (edc_read== H5Z_DISABLE_EDC) ? H5Z_FLAG_SKIP_EDC : 0;
+            new_nbytes = (fclass->filter)(tmp_flags, pline->filter[idx].cd_nelmts,
                                         pline->filter[idx].cd_values, *nbytes, buf_size, buf);
 
 #ifdef H5Z_DEBUG
-	    H5_timer_end(&(fstats->stats[1].timer), &timer);
-	    fstats->stats[1].total += MAX(*nbytes, new_nbytes);
-	    if (0==new_nbytes) fstats->stats[1].errors += *nbytes;
+            H5_timer_end (&(fstats->stats[1].timer), &timer);
+            fstats->stats[1].total += MAX(*nbytes, new_nbytes);
+            if (0 == new_nbytes)
+                fstats->stats[1].errors += *nbytes;
 #endif
 
-            if(0==new_nbytes) {
-                if((cb_struct.func && (H5Z_CB_FAIL==cb_struct.func(pline->filter[idx].id, *buf, *buf_size, cb_struct.op_data)))
-                    || !cb_struct.func)
-		      HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "filter returned failure during read")
+            if (0 == new_nbytes) {
+                if ((cb_struct.func && (H5Z_CB_FAIL == cb_struct.func(pline->filter[idx].id, *buf, *buf_size, cb_struct.op_data))) || !cb_struct.func)
+                    HGOTO_ERROR(H5E_PLINE, H5E_READERROR, FAIL, "filter returned failure during read")
 
                 *nbytes = *buf_size;
                 failed |= (unsigned)1 << idx;
-                H5E_clear_stack(NULL);
-            } else {
+                H5E_clear_stack (NULL);
+            }
+            else
                 *nbytes = new_nbytes;
+        }
+    }
+    else if (pline) { /* Write */
+        for (idx = 0; idx < pline->nused; idx++) {
+            if (*filter_mask & ((unsigned)1 << idx)) {
+                failed |= (unsigned)1 << idx;
+                continue; /*filter excluded*/
             }
-	}
-    } else if (pline) { /* Write */
-	for (idx=0; idx<pline->nused; idx++) {
-	    if (*filter_mask & ((unsigned)1<<idx)) {
-		failed |= (unsigned)1 << idx;
-		continue; /*filter excluded*/
-	    }
-	    if ((fclass_idx=H5Z_find_idx(pline->filter[idx].id))<0) {
+            if ((fclass_idx = H5Z_find_idx(pline->filter[idx].id)) < 0) {
                 /* Check if filter is optional -- If it isn't, then error */
-		if ((pline->filter[idx].flags & H5Z_FLAG_OPTIONAL) == 0)
-		    HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "required filter is not registered")
-
-		failed |= (unsigned)1 << idx;
-                H5E_clear_stack(NULL);
-		continue; /*filter excluded*/
-	    }
-            fclass=&H5Z_table_g[fclass_idx];
+                if ((pline->filter[idx].flags & H5Z_FLAG_OPTIONAL) == 0)
+                    HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "required filter is not registered")
+
+                failed |= (unsigned)1 << idx;
+                H5E_clear_stack (NULL);
+                continue; /*filter excluded*/
+            }
+            fclass = &H5Z_table_g[fclass_idx];
 #ifdef H5Z_DEBUG
-            fstats=&H5Z_stat_table_g[fclass_idx];
-	    H5_timer_begin(&timer);
+            fstats = &H5Z_stat_table_g[fclass_idx];
+            H5_timer_begin (&timer);
 #endif
-	    new_nbytes = (fclass->filter)(flags|(pline->filter[idx].flags), pline->filter[idx].cd_nelmts,
-					pline->filter[idx].cd_values, *nbytes, buf_size, buf);
+            new_nbytes = (fclass->filter)(flags | (pline->filter[idx].flags), pline->filter[idx].cd_nelmts,
+                    pline->filter[idx].cd_values, *nbytes, buf_size, buf);
 #ifdef H5Z_DEBUG
-	    H5_timer_end(&(fstats->stats[0].timer), &timer);
-	    fstats->stats[0].total += MAX(*nbytes, new_nbytes);
-	    if (0==new_nbytes) fstats->stats[0].errors += *nbytes;
+            H5_timer_end (&(fstats->stats[0].timer), &timer);
+            fstats->stats[0].total += MAX(*nbytes, new_nbytes);
+            if (0 == new_nbytes)
+                fstats->stats[0].errors += *nbytes;
 #endif
-            if(0==new_nbytes) {
-                if (0==(pline->filter[idx].flags & H5Z_FLAG_OPTIONAL)) {
-                    if((cb_struct.func && (H5Z_CB_FAIL==cb_struct.func(pline->filter[idx].id, *buf, *nbytes, cb_struct.op_data)))
-                            || !cb_struct.func)
+            if (0 == new_nbytes) {
+                if (0 == (pline->filter[idx].flags & H5Z_FLAG_OPTIONAL)) {
+                    if ((cb_struct.func && (H5Z_CB_FAIL == cb_struct.func (pline->filter[idx].id, *buf, *nbytes, cb_struct.op_data))) || !cb_struct.func)
                         HGOTO_ERROR(H5E_PLINE, H5E_WRITEERROR, FAIL, "filter returned failure")
 
                     *nbytes = *buf_size;
                 }
 
                 failed |= (unsigned)1 << idx;
-                H5E_clear_stack(NULL);
-            } else {
-                *nbytes = new_nbytes;
+                H5E_clear_stack (NULL);
             }
-	}
+            else
+                *nbytes = new_nbytes;
+        }
     }
 
     *filter_mask = failed;
@@ -1434,41 +1385,36 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_filter_info
- *
- * Purpose:	Get pointer to filter info for pipeline
+ * Function: H5Z_filter_info
  *
- * Return:	Non-negative on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Friday, April  5, 2003
- *
- * Modifications:
+ * Purpose:  Get pointer to filter info for pipeline
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 H5Z_filter_info_t *
 H5Z_filter_info(const H5O_pline_t *pline, H5Z_filter_t filter)
 {
-    size_t	idx;                            /* Index of filter in pipeline */
+    size_t             idx;                     /* Index of filter in pipeline */
     H5Z_filter_info_t *ret_value = NULL;        /* Return value */
 
     FUNC_ENTER_NOAPI(NULL)
 
     HDassert(pline);
-    HDassert(filter>=0 && filter<=H5Z_FILTER_MAX);
+    HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
 
     /* Locate the filter in the pipeline */
-    for(idx=0; idx<pline->nused; idx++)
-        if(pline->filter[idx].id==filter)
+    for (idx = 0; idx < pline->nused; idx++)
+        if (pline->filter[idx].id == filter)
             break;
 
     /* Check if the filter was not already in the pipeline */
-    if(idx>=pline->nused)
-	HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "filter not in pipeline")
+    if (idx >= pline->nused)
+        HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, NULL, "filter not in pipeline")
 
     /* Set return value */
-    ret_value=&pline->filter[idx];
+    ret_value = &pline->filter[idx];
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1476,41 +1422,35 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_filter_in_pline
- *
- * Purpose:	Check wheter a filter is in the filter pipeline using the 
- *              filter ID.  This function is very similar to H5Z_filter_info
+ * Function: H5Z_filter_in_pline
  *
- * Return:	TRUE   - found filter
- *              FALSE  - not found
- *              FAIL   - error
- *
- * Programmer:	Raymond Lu
- *              26 April 2013
- *
- * Modifications:
+ * Purpose:  Check wheter a filter is in the filter pipeline using the
+ *           filter ID.  This function is very similar to H5Z_filter_info
  *
+ * Return:   TRUE   - found filter
+ *           FALSE  - not found
+ *           FAIL   - error
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Z_filter_in_pline(const H5O_pline_t *pline, H5Z_filter_t filter)
 {
-    size_t	idx;                    /* Index of filter in pipeline */
-    htri_t      ret_value = TRUE;       /* Return value */
+    size_t    idx;                    /* Index of filter in pipeline */
+    htri_t    ret_value = TRUE;       /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
     HDassert(pline);
-    HDassert(filter>=0 && filter<=H5Z_FILTER_MAX);
+    HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
 
     /* Locate the filter in the pipeline */
-    for(idx=0; idx<pline->nused; idx++)
-        if(pline->filter[idx].id==filter)
+    for (idx = 0; idx < pline->nused; idx++)
+        if (pline->filter[idx].id == filter)
             break;
 
     /* Check if the filter was not already in the pipeline */
-    if(idx>=pline->nused)
-	ret_value = FALSE;
+    if (idx >= pline->nused)
+        ret_value = FALSE;
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1519,25 +1459,20 @@ done:
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5Z_all_filters_avail
- *
- * Purpose:	Verify that all the filters in a pipeline are currently
- *              available (i.e. registered)
+ * Function: H5Z_all_filters_avail
  *
- * Return:	Non-negative (TRUE/FALSE) on success/Negative on failure
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, April  8, 2003
- *
- * Modifications:
+ * Purpose:  Verify that all the filters in a pipeline are currently
+ *           available (i.e. registered)
  *
+ * Return:   Non-negative (TRUE/FALSE) on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 htri_t
 H5Z_all_filters_avail(const H5O_pline_t *pline)
 {
-    size_t i,j;                 /* Local index variable */
-    htri_t ret_value=TRUE;      /* Return value */
+    size_t i, j;                  /* Local index variable */
+    htri_t ret_value = TRUE;      /* Return value */
 
     FUNC_ENTER_NOAPI(FAIL)
 
@@ -1545,15 +1480,14 @@ H5Z_all_filters_avail(const H5O_pline_t *pline)
     HDassert(pline);
 
     /* Iterate through all the filters in pipeline */
-    for(i=0; i<pline->nused; i++) {
-
+    for (i = 0; i < pline->nused; i++) {
         /* Look for each filter in the list of registered filters */
-        for(j=0; j<H5Z_table_used_g; j++)
-            if(H5Z_table_g[j].id==pline->filter[i].id)
+        for (j = 0; j < H5Z_table_used_g; j++)
+            if (H5Z_table_g[j].id == pline->filter[i].id)
                 break;
 
         /* Check if we didn't find the filter */
-        if(j==H5Z_table_used_g)
+        if (j == H5Z_table_used_g)
             HGOTO_DONE(FALSE)
     } /* end for */
 
@@ -1561,21 +1495,15 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z_all_filters_avail() */
 
-
 
 /*-------------------------------------------------------------------------
  * Function: H5Z_delete
  *
- * Purpose: Delete filter FILTER from pipeline PLINE;
- *  deletes all filters if FILTER is H5Z_FILTER_NONE
- *
- * Return: Non-negative on success/Negative on failure
- *
- * Programmer: Pedro Vicente
- *              Monday, January 26, 2004
- *
- * Modifications:
+ * Purpose:  Delete filter FILTER from pipeline PLINE;
+ *           deletes all filters if FILTER is H5Z_FILTER_NONE
  *
+ * Return:   Non-negative on success
+ *           Negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1590,57 +1518,57 @@ H5Z_delete(H5O_pline_t *pline, H5Z_filter_t filter)
     HDassert(filter >= 0 && filter <= H5Z_FILTER_MAX);
 
     /* if the pipeline has no filters, just return */
-    if(pline->nused==0)
-        HGOTO_DONE(SUCCEED)
+    if (pline->nused == 0)
+        HGOTO_DONE (SUCCEED)
 
     /* Delete all filters */
-    if(H5Z_FILTER_ALL == filter) {
-        if(H5O_msg_reset(H5O_PLINE_ID, pline) < 0)
+    if (H5Z_FILTER_ALL == filter) {
+        if (H5O_msg_reset(H5O_PLINE_ID, pline) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTFREE, FAIL, "can't release pipeline info")
     } /* end if */
     /* Delete filter */
     else {
-        size_t idx;             /* Index of filter in pipeline */
-        hbool_t found = FALSE;  /* Indicate filter was found in pipeline */
+        size_t  idx;             /* Index of filter in pipeline */
+        hbool_t found = FALSE;   /* Indicate filter was found in pipeline */
 
         /* Locate the filter in the pipeline */
-        for(idx = 0; idx < pline->nused; idx++)
-            if(pline->filter[idx].id == filter) {
+        for (idx = 0; idx < pline->nused; idx++)
+            if (pline->filter[idx].id == filter) {
                 found = TRUE;
                 break;
-            } /* end if */
+            }
 
         /* filter was not found in the pipeline */
-        if(!found)
+        if (!found)
             HGOTO_ERROR(H5E_PLINE, H5E_NOTFOUND, FAIL, "filter not in pipeline")
 
         /* Free information for deleted filter */
-        if(pline->filter[idx].name && pline->filter[idx].name != pline->filter[idx]._name)
+        if (pline->filter[idx].name && pline->filter[idx].name != pline->filter[idx]._name)
             HDassert((HDstrlen(pline->filter[idx].name) + 1) > H5Z_COMMON_NAME_LEN);
-        if(pline->filter[idx].name != pline->filter[idx]._name)
+        if (pline->filter[idx].name != pline->filter[idx]._name)
             pline->filter[idx].name = (char *)H5MM_xfree(pline->filter[idx].name);
-        if(pline->filter[idx].cd_values && pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
+        if (pline->filter[idx].cd_values && pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
             HDassert(pline->filter[idx].cd_nelmts > H5Z_COMMON_CD_VALUES);
-        if(pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
+        if (pline->filter[idx].cd_values != pline->filter[idx]._cd_values)
             pline->filter[idx].cd_values = (unsigned *)H5MM_xfree(pline->filter[idx].cd_values);
 
         /* Remove filter from pipeline array */
-        if((idx + 1) < pline->nused) {
+        if ((idx + 1) < pline->nused) {
             /* Copy filters down & fix up any client data value arrays using internal storage */
-            for(; (idx + 1) < pline->nused; idx++) {
+            for (; (idx + 1) < pline->nused; idx++) {
                 pline->filter[idx] = pline->filter[idx + 1];
-                if(pline->filter[idx].name && (HDstrlen(pline->filter[idx].name) + 1) <= H5Z_COMMON_NAME_LEN)
+                if (pline->filter[idx].name && (HDstrlen(pline->filter[idx].name) + 1) <= H5Z_COMMON_NAME_LEN)
                     pline->filter[idx].name = pline->filter[idx]._name;
-                if(pline->filter[idx].cd_nelmts <= H5Z_COMMON_CD_VALUES)
+                if (pline->filter[idx].cd_nelmts <= H5Z_COMMON_CD_VALUES)
                     pline->filter[idx].cd_values = pline->filter[idx]._cd_values;
-            } /* end for */
-        } /* end if */
+            }
+        }
 
         /* Decrement number of used filters */
         pline->nused--;
 
         /* Reset information for previous last filter in pipeline */
-        HDmemset(&pline->filter[pline->nused], 0, sizeof(H5Z_filter_info_t));
+        HDmemset (&pline->filter[pline->nused], 0, sizeof(H5Z_filter_info_t));
     } /* end else */
 
 done:
@@ -1651,14 +1579,11 @@ done:
 /*-------------------------------------------------------------------------
  * Function: H5Zget_filter_info
  *
- * Purpose: Gets information about a pipeline data filter and stores it
- *          in filter_config_flags.
- *
- * Return: zero on success / negative on failure
- *
- * Programmer: James Laird and Nat Furrer
- *              Monday, June 7, 2004
+ * Purpose:  Gets information about a pipeline data filter and stores it
+ *           in filter_config_flags.
  *
+ * Return:   zero on success
+ *           negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
@@ -1670,8 +1595,8 @@ H5Zget_filter_info(H5Z_filter_t filter, unsigned int *filter_config_flags)
     H5TRACE2("e", "Zf*Iu", filter, filter_config_flags);
 
     /* Get the filter info */
-    if(H5Z_get_filter_info(filter, filter_config_flags) < 0)
-        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "Filter info not retrieved")
+    if (H5Z_get_filter_info(filter, filter_config_flags) < 0)
+        HGOTO_ERROR (H5E_PLINE, H5E_CANTGET, FAIL, "Filter info not retrieved")
 
 done:
     FUNC_LEAVE_API(ret_value)
@@ -1681,35 +1606,32 @@ done:
 /*-------------------------------------------------------------------------
  * Function: H5Z_get_filter_info
  *
- * Purpose: Gets information about a pipeline data filter and stores it
- *          in filter_config_flags.
- *
- * Return: zero on success / negative on failure
- *
- * Programmer: Quincey Koziol
- *             Saturday, May 11, 2013
+ * Purpose:  Gets information about a pipeline data filter and stores it
+ *           in filter_config_flags.
  *
+ * Return:   zero on success
+ *           negative on failure
  *-------------------------------------------------------------------------
  */
 herr_t
 H5Z_get_filter_info(H5Z_filter_t filter, unsigned int *filter_config_flags)
 {
     H5Z_class2_t *fclass;
-    herr_t ret_value = SUCCEED;
+    herr_t        ret_value = SUCCEED;
 
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Look up the filter class info */
-    if(NULL == (fclass = H5Z_find(filter)))
+    if (NULL == (fclass = H5Z_find(filter)))
         HGOTO_ERROR(H5E_PLINE, H5E_BADVALUE, FAIL, "Filter not defined")
 
     /* Set the filter config flags for the application */
-    if(filter_config_flags != NULL) {
+    if (filter_config_flags != NULL) {
         *filter_config_flags = 0;
 
-        if(fclass->encoder_present)
+        if (fclass->encoder_present)
             *filter_config_flags |= H5Z_FILTER_CONFIG_ENCODE_ENABLED;
-        if(fclass->decoder_present)
+        if (fclass->decoder_present)
             *filter_config_flags |= H5Z_FILTER_CONFIG_DECODE_ENABLED;
     } /* end if */
 
diff --git a/src/H5Zdeflate.c b/src/H5Zdeflate.c
index 15aac27..34fdfec 100644
--- a/src/H5Zdeflate.c
+++ b/src/H5Zdeflate.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Zfletcher32.c b/src/H5Zfletcher32.c
index 9ff85cc..4cd77ef 100644
--- a/src/H5Zfletcher32.c
+++ b/src/H5Zfletcher32.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Zmodule.h b/src/H5Zmodule.h
index fa0ef8f..97e158c 100644
--- a/src/H5Zmodule.h
+++ b/src/H5Zmodule.h
@@ -4,12 +4,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5Znbit.c b/src/H5Znbit.c
index b041613..c0afc38 100644
--- a/src/H5Znbit.c
+++ b/src/H5Znbit.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Zmodule.h"          /* This source code file is part of the H5Z module */
@@ -288,7 +286,7 @@ H5Z_calc_parms_array(const H5T_t *type, size_t *cd_values_actual_nparms)
 
 done:
     if(dtype_base)
-        if(H5T_close(dtype_base) < 0)
+        if(H5T_close_real(dtype_base) < 0)
             HDONE_ERROR(H5E_PLINE, H5E_CLOSEERROR, FAIL, "Unable to close base datatype")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -387,14 +385,14 @@ H5Z_calc_parms_compound(const H5T_t *type, size_t *cd_values_actual_nparms)
         } /* end switch */
 
         /* Close member datatype */
-        if(H5T_close(dtype_member) < 0)
+        if(H5T_close_real(dtype_member) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CLOSEERROR, FAIL, "Unable to close member datatype")
         dtype_member = NULL;
     } /* end for */
 
 done:
     if(dtype_member)
-        if(H5T_close(dtype_member) < 0)
+        if(H5T_close_real(dtype_member) < 0)
             HDONE_ERROR(H5E_PLINE, H5E_CLOSEERROR, FAIL, "Unable to close member datatype")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -635,7 +633,7 @@ H5Z_set_parms_array(const H5T_t *type, unsigned *cd_values_index,
 
 done:
     if(dtype_base)
-        if(H5T_close(dtype_base) < 0)
+        if(H5T_close_real(dtype_base) < 0)
             HDONE_ERROR(H5E_PLINE, H5E_CLOSEERROR, FAIL, "Unable to close base datatype")
 
     FUNC_LEAVE_NOAPI(ret_value)
@@ -776,14 +774,14 @@ H5Z_set_parms_compound(const H5T_t *type, unsigned *cd_values_index,
         } /* end switch */
 
         /* Close member datatype */
-        if(H5T_close(dtype_member) < 0)
+        if(H5T_close_real(dtype_member) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CLOSEERROR, FAIL, "Unable to close member datatype")
         dtype_member = NULL;
     } /* end for */
 
 done:
     if(dtype_member)
-        if(H5T_close(dtype_member) < 0)
+        if(H5T_close_real(dtype_member) < 0)
             HDONE_ERROR(H5E_PLINE, H5E_CLOSEERROR, FAIL, "Unable to close member datatype")
 
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Zpkg.h b/src/H5Zpkg.h
index aa2ffe2..55fca27 100644
--- a/src/H5Zpkg.h
+++ b/src/H5Zpkg.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #if !(defined H5Z_FRIEND || defined H5Z_MODULE)
@@ -53,5 +51,8 @@ H5_DLLVAR const H5Z_class2_t H5Z_DEFLATE[1];
 H5_DLLVAR H5Z_class2_t H5Z_SZIP[1];
 #endif /* H5_HAVE_FILTER_SZIP */
 
+/* Package internal routines */
+H5_DLL herr_t H5Z__unregister(H5Z_filter_t filter_id);
+
 #endif /* _H5Zpkg_H */
 
diff --git a/src/H5Zprivate.h b/src/H5Zprivate.h
index 73d85ac..fbc6fc4 100644
--- a/src/H5Zprivate.h
+++ b/src/H5Zprivate.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Robb Matzke <matzke@llnl.gov>
@@ -20,6 +18,9 @@
 #ifndef _H5Zprivate_H
 #define _H5Zprivate_H
 
+/* Early typedefs to avoid circular dependencies */
+typedef struct H5Z_filter_info_t H5Z_filter_info_t;
+
 /* Include package's public header */
 #include "H5Zpublic.h"
 
@@ -51,7 +52,7 @@
 /****************************/
 
 /* Structure to store information about each filter's parameters */
-typedef struct H5Z_filter_info_t {
+struct H5Z_filter_info_t {
     H5Z_filter_t	id;		/*filter identification number	     */
     unsigned		flags;		/*defn and invocation flags	     */
     char		_name[H5Z_COMMON_NAME_LEN];	/*internal filter name		     */
@@ -59,7 +60,7 @@ typedef struct H5Z_filter_info_t {
     size_t		cd_nelmts;	/*number of elements in cd_values[]  */
     unsigned		_cd_values[H5Z_COMMON_CD_VALUES];	/*internal client data values		     */
     unsigned		*cd_values;	/*client data values		     */
-} H5Z_filter_info_t;
+};
 
 /*****************************/
 /* Library-private Variables */
@@ -92,7 +93,6 @@ H5_DLL H5Z_filter_info_t *H5Z_filter_info(const struct H5O_pline_t *pline,
         H5Z_filter_t filter);
 H5_DLL htri_t H5Z_filter_in_pline(const struct H5O_pline_t *pline, H5Z_filter_t filter);
 H5_DLL htri_t H5Z_all_filters_avail(const struct H5O_pline_t *pline);
-H5_DLL herr_t H5Z_unregister(H5Z_filter_t filter_id);
 H5_DLL htri_t H5Z_filter_avail(H5Z_filter_t id);
 H5_DLL herr_t H5Z_delete(struct H5O_pline_t *pline, H5Z_filter_t filter);
 H5_DLL herr_t H5Z_get_filter_info(H5Z_filter_t filter, unsigned int *filter_config_flags);
diff --git a/src/H5Zpublic.h b/src/H5Zpublic.h
index 8daa5f4..fcb2d37 100644
--- a/src/H5Zpublic.h
+++ b/src/H5Zpublic.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Robb Matzke <matzke@llnl.gov>
@@ -131,8 +129,8 @@ typedef H5Z_cb_return_t (*H5Z_filter_func_t)(H5Z_filter_t filter, void* buf,
 
 /* Structure for filter callback property */
 typedef struct H5Z_cb_t {
-    H5Z_filter_func_t func;
-    void*              op_data;
+    H5Z_filter_func_t   func;
+    void                *op_data;
 } H5Z_cb_t;
 
 #ifdef __cplusplus
@@ -208,14 +206,14 @@ typedef size_t (*H5Z_func_t)(unsigned int flags, size_t cd_nelmts,
  * contain a pointers to the filter function and timing statistics.
  */
 typedef struct H5Z_class2_t {
-    int version;                /* Version number of the H5Z_class_t struct */
-    H5Z_filter_t id;		/* Filter ID number			     */
-    unsigned encoder_present;   /* Does this filter have an encoder? */
-    unsigned decoder_present;   /* Does this filter have a decoder? */
-    const char	*name;		/* Comment for debugging		     */
-    H5Z_can_apply_func_t can_apply; /* The "can apply" callback for a filter */
-    H5Z_set_local_func_t set_local; /* The "set local" callback for a filter */
-    H5Z_func_t filter;		/* The actual filter function		     */
+    int version;                    /* Version number of the H5Z_class_t struct     */
+    H5Z_filter_t id;                /* Filter ID number                             */
+    unsigned encoder_present;       /* Does this filter have an encoder?            */
+    unsigned decoder_present;       /* Does this filter have a decoder?             */
+    const char	*name;              /* Comment for debugging                        */
+    H5Z_can_apply_func_t can_apply; /* The "can apply" callback for a filter        */
+    H5Z_set_local_func_t set_local; /* The "set local" callback for a filter        */
+    H5Z_func_t filter;              /* The actual filter function                   */
 } H5Z_class2_t;
 
 H5_DLL herr_t H5Zregister(const void *cls);
diff --git a/src/H5Zscaleoffset.c b/src/H5Zscaleoffset.c
index 449847f..d139696 100644
--- a/src/H5Zscaleoffset.c
+++ b/src/H5Zscaleoffset.c
@@ -5,26 +5,24 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Zmodule.h"          /* This source code file is part of the H5Z module */
 
-#include "H5private.h"		/* Generic Functions			*/
-#include "H5ACprivate.h"	/* Metadata cache			*/
-#include "H5Eprivate.h"		/* Error handling		  	*/
-#include "H5Iprivate.h"		/* IDs			  		*/
-#include "H5MMprivate.h"	/* Memory management			*/
+#include "H5private.h"        /* Generic Functions            */
+#include "H5ACprivate.h"    /* Metadata cache            */
+#include "H5Eprivate.h"        /* Error handling              */
+#include "H5Iprivate.h"        /* IDs                      */
+#include "H5MMprivate.h"    /* Memory management            */
 #include "H5Pprivate.h"         /* Property lists                       */
 #include "H5Oprivate.h"         /* Object headers                       */
-#include "H5Sprivate.h"		/* Dataspaces         			*/
-#include "H5Tprivate.h"		/* Datatypes         			*/
-#include "H5Zpkg.h"		/* Data filters				*/
+#include "H5Sprivate.h"        /* Dataspaces                     */
+#include "H5Tprivate.h"        /* Datatypes                     */
+#include "H5Zpkg.h"        /* Data filters                */
 
 /* Struct of parameters needed for compressing/decompressing one atomic datatype */
 typedef struct {
@@ -43,7 +41,7 @@ static enum H5Z_scaleoffset_t H5Z_scaleoffset_get_type(unsigned dtype_class,
     unsigned dtype_size, unsigned dtype_sign);
 static herr_t H5Z_scaleoffset_set_parms_fillval(H5P_genplist_t *dcpl_plist,
     H5T_t *type, enum H5Z_scaleoffset_t scale_type, unsigned cd_values[],
-    int need_convert, hid_t dxpl_id);
+    int need_convert);
 static herr_t H5Z_set_local_scaleoffset(hid_t dcpl_id, hid_t type_id, hid_t space_id);
 static size_t H5Z_filter_scaleoffset(unsigned flags, size_t cd_nelmts,
     const unsigned cd_values[], size_t nbytes, size_t *buf_size, void **buf);
@@ -80,13 +78,13 @@ static void H5Z_scaleoffset_compress(unsigned char *data, unsigned d_nelmts, uns
 /* This message derives from H5Z */
 H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
     H5Z_CLASS_T_VERS,       /* H5Z_class_t version */
-    H5Z_FILTER_SCALEOFFSET, /* Filter id number		*/
+    H5Z_FILTER_SCALEOFFSET, /* Filter id number        */
     1,              /* Assume encoder present: check before registering */
     1,              /* decoder_present flag (set to true) */
-    "scaleoffset",		/* Filter name for debugging	*/
-    H5Z_can_apply_scaleoffset,	/* The "can apply" callback     */
+    "scaleoffset",        /* Filter name for debugging    */
+    H5Z_can_apply_scaleoffset,    /* The "can apply" callback     */
     H5Z_set_local_scaleoffset,  /* The "set local" callback     */
-    H5Z_filter_scaleoffset,	/* The actual filter function	*/
+    H5Z_filter_scaleoffset,    /* The actual filter function    */
 }};
 
 /* Local macros */
@@ -185,12 +183,12 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
 }
 
 /* Set the fill value parameter in cd_values[] for unsigned integer type */
-#define H5Z_scaleoffset_set_filval_1(type, dcpl_plist, dt, cd_values, need_convert, dxpl_id)\
+#define H5Z_scaleoffset_set_filval_1(type, dcpl_plist, dt, cd_values, need_convert)  \
 {                                                                                    \
     type fill_val;                                                                   \
                                                                                      \
     /* Get dataset fill value */                                                     \
-    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val, dxpl_id) < 0)                   \
+    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val) < 0)                            \
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "unable to get fill value")        \
                                                                                      \
     if(need_convert)                                                                 \
@@ -200,12 +198,12 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
 }
 
 /* Set the fill value parameter in cd_values[] for signed integer type */
-#define H5Z_scaleoffset_set_filval_2(type, dcpl_plist, dt, cd_values, need_convert, dxpl_id)\
+#define H5Z_scaleoffset_set_filval_2(type, dcpl_plist, dt, cd_values, need_convert)  \
 {                                                                                    \
     type fill_val;                                                                   \
                                                                                      \
     /* Get dataset fill value */                                                     \
-    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val, dxpl_id) < 0)                   \
+    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val) < 0)                            \
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "unable to get fill value")        \
                                                                                      \
     if(need_convert)                                                                 \
@@ -215,12 +213,12 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
 }
 
 /* Set the fill value parameter in cd_values[] for character integer type */
-#define H5Z_scaleoffset_set_filval_3(type, dcpl_plist, dt, cd_values, need_convert, dxpl_id)\
+#define H5Z_scaleoffset_set_filval_3(type, dcpl_plist, dt, cd_values, need_convert)  \
 {                                                                                    \
     type fill_val;                                                                   \
                                                                                      \
     /* Get dataset fill value */                                                     \
-    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val, dxpl_id) < 0)                   \
+    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val) < 0)                            \
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "unable to get fill value")        \
                                                                                      \
     /* Store the fill value as the last entry in cd_values[] */                      \
@@ -228,12 +226,12 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
 }
 
 /* Set the fill value parameter in cd_values[] for floating-point type */
-#define H5Z_scaleoffset_set_filval_4(type, dcpl_plist, dt, cd_values, need_convert, dxpl_id)\
+#define H5Z_scaleoffset_set_filval_4(type, dcpl_plist, dt, cd_values, need_convert) \
 {                                                                             \
     type fill_val;                                                            \
                                                                               \
     /* Get dataset fill value */                                              \
-    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val, dxpl_id) < 0)            \
+    if(H5P_get_fill_value(dcpl_plist, dt, &fill_val) < 0)                     \
         HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "unable to get fill value") \
                                                                               \
     if(need_convert)                                                          \
@@ -667,15 +665,15 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
       H5Z_scaleoffset_modify_4(i, type, pow_fun, buf, d_nelmts, min, D_val)                     \
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Z_can_apply_scaleoffset
+ * Function:    H5Z_can_apply_scaleoffset
  *
- * Purpose:	Check the parameters for scaleoffset compression for
+ * Purpose:    Check the parameters for scaleoffset compression for
  *              validity and whether they fit a particular dataset.
  *
- * Return:	Success: Non-negative
- *		Failure: Negative
+ * Return:    Success: Non-negative
+ *        Failure: Negative
  *
  * Programmer:  Xiaowen Wu
  *              Friday, February 4, 2005
@@ -687,7 +685,7 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
 static htri_t
 H5Z_can_apply_scaleoffset(hid_t H5_ATTR_UNUSED dcpl_id, hid_t type_id, hid_t H5_ATTR_UNUSED space_id)
 {
-    const H5T_t	*type;                  /* Datatype */
+    const H5T_t    *type;                  /* Datatype */
     H5T_class_t dtype_class;            /* Datatype's class */
     H5T_order_t dtype_order;            /* Datatype's endianness order */
     htri_t ret_value = TRUE;            /* Return value */
@@ -696,20 +694,20 @@ H5Z_can_apply_scaleoffset(hid_t H5_ATTR_UNUSED dcpl_id, hid_t type_id, hid_t H5_
 
     /* Get datatype */
     if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
     /* Get datatype's class, for checking the "datatype class" */
     if((dtype_class = H5T_get_class(type, TRUE)) == H5T_NO_CLASS)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype class")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype class")
 
     /* Get datatype's size, for checking the "datatype size" */
     if(H5T_get_size(type) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
 
     if(dtype_class == H5T_INTEGER || dtype_class == H5T_FLOAT) {
         /* Get datatype's endianness order */
         if((dtype_order = H5T_get_order(type)) == H5T_ORDER_ERROR)
-	    HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "can't retrieve datatype endianness order")
+            HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "can't retrieve datatype endianness order")
 
         /* Range check datatype's endianness order */
         if(dtype_order != H5T_ORDER_LE && dtype_order != H5T_ORDER_BE)
@@ -721,17 +719,17 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z_can_apply_scaleoffset() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Z_scaleoffset_get_type
+ * Function:    H5Z_scaleoffset_get_type
  *
- * Purpose:	Get the specific integer type based on datatype size and sign
+ * Purpose:    Get the specific integer type based on datatype size and sign
  *              or floating-point type based on size
  *
- * Return:	Success: id number of integer type
- *		Failure: 0
+ * Return:    Success: id number of integer type
+ *        Failure: 0
  *
- * Programmer:	Xiaowen Wu
+ * Programmer:    Xiaowen Wu
  *              Wednesday, April 13, 2005
  *
  * Modifications:
@@ -786,14 +784,14 @@ done:
     FUNC_LEAVE_NOAPI(ret_value)
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Z_scaleoffset_set_parms_fillval
+ * Function:    H5Z_scaleoffset_set_parms_fillval
  *
- * Purpose:	Get the fill value of the dataset and store in cd_values[]
+ * Purpose:    Get the fill value of the dataset and store in cd_values[]
  *
- * Return:	Success: Non-negative
- *		Failure: Negative
+ * Return:    Success: Non-negative
+ *        Failure: Negative
  *
  * Programmer:  Xiaowen Wu
  *              Monday, March 7, 2005
@@ -803,52 +801,52 @@ done:
 static herr_t
 H5Z_scaleoffset_set_parms_fillval(H5P_genplist_t *dcpl_plist,
     H5T_t *type, enum H5Z_scaleoffset_t scale_type,
-    unsigned cd_values[], int need_convert, hid_t dxpl_id)
+    unsigned cd_values[], int need_convert)
 {
     herr_t ret_value = SUCCEED;          /* Return value */
 
     FUNC_ENTER_NOAPI_NOINIT
 
     if(scale_type == t_uchar)
-        H5Z_scaleoffset_set_filval_3(unsigned char, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_3(unsigned char, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_ushort)
-        H5Z_scaleoffset_set_filval_1(unsigned short, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_1(unsigned short, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_uint)
-        H5Z_scaleoffset_set_filval_1(unsigned int, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_1(unsigned int, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_ulong)
-        H5Z_scaleoffset_set_filval_1(unsigned long, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_1(unsigned long, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_ulong_long)
-        H5Z_scaleoffset_set_filval_1(unsigned long long, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_1(unsigned long long, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_schar)
-        H5Z_scaleoffset_set_filval_3(signed char, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_3(signed char, dcpl_plist, type, cd_values, need_convertd)
     else if(scale_type == t_short)
-        H5Z_scaleoffset_set_filval_2(short, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_2(short, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_int)
-        H5Z_scaleoffset_set_filval_2(int, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_2(int, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_long)
-        H5Z_scaleoffset_set_filval_2(long, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_2(long, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_long_long)
-        H5Z_scaleoffset_set_filval_2(long long, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_2(long long, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_float)
-        H5Z_scaleoffset_set_filval_4(float, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_4(float, dcpl_plist, type, cd_values, need_convert)
     else if(scale_type == t_double)
-        H5Z_scaleoffset_set_filval_4(double, dcpl_plist, type, cd_values, need_convert, dxpl_id)
+        H5Z_scaleoffset_set_filval_4(double, dcpl_plist, type, cd_values, need_convert)
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z_scaleoffset_set_parms_fillval() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Z_set_local_scaleoffset
+ * Function:    H5Z_set_local_scaleoffset
  *
- * Purpose:	Set the "local" dataset parameters for scaleoffset
+ * Purpose:    Set the "local" dataset parameters for scaleoffset
  *              compression.
  *
- * Return:	Success: Non-negative
- *		Failure: Negative
+ * Return:    Success: Non-negative
+ *        Failure: Negative
  *
- * Programmer:	Xiaowen Wu
+ * Programmer:    Xiaowen Wu
  *              Friday, February 4, 2005
  *
  * Modifications:
@@ -859,8 +857,8 @@ static herr_t
 H5Z_set_local_scaleoffset(hid_t dcpl_id, hid_t type_id, hid_t space_id)
 {
     H5P_genplist_t *dcpl_plist;     /* Property list pointer */
-    H5T_t	*type;              /* Datatype */
-    const H5S_t	*ds;                /* Dataspace */
+    H5T_t    *type;              /* Datatype */
+    const H5S_t    *ds;                /* Dataspace */
     unsigned flags;                 /* Filter flags */
     size_t cd_nelmts = H5Z_SCALEOFFSET_USER_NPARMS;  /* Number of filter parameters */
     unsigned cd_values[H5Z_SCALEOFFSET_TOTAL_NPARMS]; /* Filter parameters */
@@ -881,14 +879,14 @@ H5Z_set_local_scaleoffset(hid_t dcpl_id, hid_t type_id, hid_t space_id)
 
     /* Get datatype */
     if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
     /* Initialize the parameters to a known state */
     HDmemset(cd_values, 0, sizeof(cd_values));
 
     /* Get the filter's current parameters */
     if(H5P_get_filter_by_id(dcpl_plist, H5Z_FILTER_SCALEOFFSET, &flags, &cd_nelmts, cd_values, (size_t)0, NULL, NULL) < 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get scaleoffset parameters")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get scaleoffset parameters")
 
     /* Get dataspace */
     if(NULL == (ds = (H5S_t *)H5I_object_verify(space_id, H5I_DATASPACE)))
@@ -932,7 +930,7 @@ H5Z_set_local_scaleoffset(hid_t dcpl_id, hid_t type_id, hid_t space_id)
 
     /* Get datatype's size */
     if((dtype_size = H5T_get_size(type)) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
 
     /* Set "local" parameter for datatype size */
     H5_CHECK_OVERFLOW(dtype_size, size_t, unsigned);
@@ -1004,29 +1002,29 @@ H5Z_set_local_scaleoffset(hid_t dcpl_id, hid_t type_id, hid_t space_id)
             HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "cannot use C integer datatype for cast")
 
         /* Get dataset fill value and store in cd_values[] */
-        if(H5Z_scaleoffset_set_parms_fillval(dcpl_plist, type, scale_type, cd_values, need_convert, H5AC_noio_dxpl_id) < 0)
+        if(H5Z_scaleoffset_set_parms_fillval(dcpl_plist, type, scale_type, cd_values, need_convert) < 0)
             HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "unable to set fill value")
     } /* end else */
 
     /* Modify the filter's parameters for this dataset */
     if(H5P_modify_filter(dcpl_plist, H5Z_FILTER_SCALEOFFSET, flags, (size_t)H5Z_SCALEOFFSET_TOTAL_NPARMS, cd_values) < 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local scaleoffset parameters")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local scaleoffset parameters")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5Z_set_local_scaleoffset() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	H5Z_filter_scaleoffset
+ * Function:    H5Z_filter_scaleoffset
  *
- * Purpose:	Implement an I/O filter for storing packed integer
+ * Purpose:    Implement an I/O filter for storing packed integer
  *              data using scale and offset method.
  *
- * Return:	Success: Size of buffer filtered
- *		Failure: 0
+ * Return:    Success: Size of buffer filtered
+ *        Failure: 0
  *
- * Programmer:	Xiaowen Wu
+ * Programmer:    Xiaowen Wu
  *              Monday, February 7, 2005
  *
  * Modifications:
@@ -1053,13 +1051,13 @@ H5Z_filter_scaleoffset(unsigned flags, size_t cd_nelmts, const unsigned cd_value
     unsigned char *outbuf = NULL;   /* pointer to new output buffer */
     unsigned buf_offset = 21;       /* buffer offset because of parameters stored in file */
     unsigned i;                     /* index */
-    parms_atomic p;                 /* paramters needed for compress/decompress functions */
+    parms_atomic p;                 /* parameters needed for compress/decompress functions */
 
     FUNC_ENTER_NOAPI_NOINIT
 
     /* check arguments */
     if(cd_nelmts != H5Z_SCALEOFFSET_TOTAL_NPARMS)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid scaleoffset number of paramters")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid scaleoffset number of parameters")
 
     /* Check if memory byte order matches dataset datatype byte order */
     switch(H5T_native_order_g) {
@@ -1109,7 +1107,7 @@ H5Z_filter_scaleoffset(unsigned flags, size_t cd_nelmts, const unsigned cd_value
         /* if scale_factor is less than 0 for integer, library will reset it to 0
          * in this case, library will calculate the minimum-bits
          */
-	if(scale_factor < 0) scale_factor = 0;
+        if(scale_factor < 0) scale_factor = 0;
     }
 
     /* fixed-minimum-bits method is not implemented and is forbidden */
@@ -1130,7 +1128,7 @@ H5Z_filter_scaleoffset(unsigned flags, size_t cd_nelmts, const unsigned cd_value
         minbits = (uint32_t)scale_factor;
     }
 
-    /* prepare paramters to pass to compress/decompress functions */
+    /* prepare parameters to pass to compress/decompress functions */
     p.size = cd_values[H5Z_SCALEOFFSET_PARM_SIZE];
     p.mem_order = H5T_native_order_g;
 
@@ -1312,7 +1310,7 @@ done:
  * atomic datatype is treated on byte basis
  */
 
-
+
 /* change byte order of input buffer either from little-endian to big-endian
  * or from big-endian to little-endian  2/21/2005
  */
diff --git a/src/H5Zshuffle.c b/src/H5Zshuffle.c
index 4cf6adf..1fef1c1 100644
--- a/src/H5Zshuffle.c
+++ b/src/H5Zshuffle.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Zmodule.h"          /* This source code file is part of the H5Z module */
diff --git a/src/H5Zszip.c b/src/H5Zszip.c
index a8ce84b..8ed173e 100644
--- a/src/H5Zszip.c
+++ b/src/H5Zszip.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Zmodule.h"          /* This source code file is part of the H5Z module */
@@ -72,8 +70,6 @@ H5Z_class2_t H5Z_SZIP[1] = {{
  * Programmer:	Quincey Koziol
  *              Monday, April  7, 2003
  *
- * Modifications:
- *
  *-------------------------------------------------------------------------
  */
 static htri_t
@@ -87,25 +83,25 @@ H5Z_can_apply_szip(hid_t H5_ATTR_UNUSED dcpl_id, hid_t type_id, hid_t H5_ATTR_UN
     FUNC_ENTER_NOAPI(FAIL)
 
     /* Get datatype */
-    if(NULL == (type = H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+    if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
     /* Get datatype's size, for checking the "bits-per-pixel" */
     if((dtype_size = (8 * H5T_get_size(type))) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size")
 
     /* Range check datatype's size */
     if(dtype_size > 32 && dtype_size != 64)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype size")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype size")
 
     /* Get datatype's endianness order */
     if((dtype_order = H5T_get_order(type)) == H5T_ORDER_ERROR)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "can't retrieve datatype endianness order")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "can't retrieve datatype endianness order")
 
     /* Range check datatype's endianness order */
     /* (Note: this may not handle non-atomic datatypes well) */
     if(dtype_order != H5T_ORDER_LE && dtype_order != H5T_ORDER_BE)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype endianness order")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FALSE, "invalid datatype endianness order")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -158,20 +154,20 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
         HGOTO_ERROR(H5E_ATOM, H5E_BADATOM, FAIL, "can't find object for ID")
 
     /* Get datatype */
-    if(NULL == (type = H5I_object_verify(type_id, H5I_DATATYPE)))
-	HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
+    if(NULL == (type = (H5T_t *)H5I_object_verify(type_id, H5I_DATATYPE)))
+        HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "not a datatype")
 
     /* Get the filter's current parameters */
     if(H5P_get_filter_by_id(dcpl_plist, H5Z_FILTER_SZIP, &flags, &cd_nelmts, cd_values, 0, NULL, NULL) < 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get szip parameters")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTGET, FAIL, "can't get szip parameters")
 
     /* Get datatype's size, for checking the "bits-per-pixel" */
     if((dtype_size = (8 * H5T_get_size(type))) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size");
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype size");
 
     /* Get datatype's precision, in case is less than full bits  */
     if((dtype_precision = H5T_get_precision(type)) == 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype precision");
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype precision");
 
     if(dtype_precision < dtype_size) {
         dtype_offset = H5T_get_offset(type);
@@ -179,9 +175,9 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
             dtype_precision = dtype_size;
     } /* end if */
     if(dtype_precision > 24) {
-	if(dtype_precision <= 32)
+        if(dtype_precision <= 32)
             dtype_precision = 32;
-	else if(dtype_precision <= 64)
+        else if(dtype_precision <= 64)
             dtype_precision = 64;
     } /* end if */
 
@@ -229,7 +225,7 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
 
     /* Get datatype's endianness order */
     if((dtype_order = H5T_get_order(type)) == H5T_ORDER_ERROR)
-	HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
+        HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
 
     /* Set the correct endianness flag for szip */
     /* (Note: this may not handle non-atomic datatypes well) */
@@ -243,13 +239,17 @@ H5Z_set_local_szip(hid_t dcpl_id, hid_t type_id, hid_t space_id)
             cd_values[H5Z_SZIP_PARM_MASK] |= SZ_MSB_OPTION_MASK;
             break;
 
+        case H5T_ORDER_ERROR:
+        case H5T_ORDER_VAX:
+        case H5T_ORDER_MIXED:
+        case H5T_ORDER_NONE:
         default:
             HGOTO_ERROR(H5E_PLINE, H5E_BADTYPE, FAIL, "bad datatype endianness order")
     } /* end switch */
 
     /* Modify the filter's parameters for this dataset */
     if(H5P_modify_filter(dcpl_plist, H5Z_FILTER_SZIP, flags, H5Z_SZIP_TOTAL_NPARMS, cd_values) < 0)
-	HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local szip parameters")
+        HGOTO_ERROR(H5E_PLINE, H5E_CANTSET, FAIL, "can't set local szip parameters")
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -268,10 +268,6 @@ done:
  * Programmer:	Kent Yang
  *              Tuesday, April 1, 2003
  *
- * Modifications:
- *              Quincey Koziol, April 2, 2003
- *              Cleaned up code.
- *
  *-------------------------------------------------------------------------
  */
 static size_t
@@ -298,7 +294,7 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
 
     /* Check arguments */
     if (cd_nelmts!=4)
-	HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid number of filter parameters")
+        HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, 0, "invalid number of filter parameters")
 
     /* Copy the filter parameters into the szip parameter block */
     H5_CHECKED_ASSIGN(sz_param.options_mask, int, cd_values[H5Z_SZIP_PARM_MASK], unsigned);
@@ -312,12 +308,12 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
         size_t nalloc;  /* Number of bytes the compressed block will expand into */
 
         /* Get the size of the uncompressed buffer */
-        newbuf = *buf;
+        newbuf = (unsigned char *)(*buf);
         UINT32DECODE(newbuf,stored_nalloc);
         H5_CHECKED_ASSIGN(nalloc, size_t, stored_nalloc, uint32_t);
 
         /* Allocate space for the uncompressed buffer */
-        if(NULL==(outbuf = H5MM_malloc(nalloc)))
+        if(NULL == (outbuf = (unsigned char *)H5MM_malloc(nalloc)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "memory allocation failed for szip decompression")
 
         /* Decompress the buffer */
@@ -340,7 +336,7 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
         unsigned char *dst = NULL;    /* Temporary pointer to new output buffer */
 
         /* Allocate space for the compressed buffer & header (assume data won't get bigger) */
-        if(NULL==(dst=outbuf = H5MM_malloc(nbytes+4)))
+        if(NULL == (dst=outbuf = (unsigned char *)H5MM_malloc(nbytes+4)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, 0, "unable to allocate szip destination buffer")
 
         /* Encode the uncompressed length */
@@ -350,7 +346,7 @@ H5Z_filter_szip (unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
         /* Compress the buffer */
         size_out = nbytes;
         if(SZ_OK!= SZ_BufftoBuffCompress(dst, &size_out, *buf, nbytes, &sz_param))
-	    HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, 0, "overflow")
+            HGOTO_ERROR(H5E_PLINE, H5E_CANTINIT, 0, "overflow")
         HDassert(size_out<=nbytes);
 
         /* Free the input buffer */
diff --git a/src/H5Ztrans.c b/src/H5Ztrans.c
index f30f0b2..d4b59a6 100644
--- a/src/H5Ztrans.c
+++ b/src/H5Ztrans.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 #include "H5Zmodule.h"          /* This source code file is part of the H5Z module */
diff --git a/src/H5api_adpt.h b/src/H5api_adpt.h
index 910bef9..0ff0f74 100644
--- a/src/H5api_adpt.h
+++ b/src/H5api_adpt.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
diff --git a/src/H5checksum.c b/src/H5checksum.c
index 48e4ce5..64d527e 100644
--- a/src/H5checksum.c
+++ b/src/H5checksum.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5dbg.c b/src/H5dbg.c
index 2039a51..dd50034 100644
--- a/src/H5dbg.c
+++ b/src/H5dbg.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5detect.c b/src/H5detect.c
index 94e841e..ff163cf 100644
--- a/src/H5detect.c
+++ b/src/H5detect.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*keep this declaration near the top of this file -RPM*/
@@ -22,32 +20,30 @@ static const char *FileHeader = "\n\
  *                                                                           *\n\
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *\n\
  * terms governing use, modification, and redistribution, is contained in    *\n\
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *\n\
- * of the source code distribution tree; Copyright.html can be found at the  *\n\
- * root level of an installed copy of the electronic HDF5 document set and   *\n\
- * is linked from the top-level documents page.  It can also be found at     *\n\
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *\n\
- * access to either file, you may request a copy from help@hdfgroup.org.     *\n\
+ * the COPYING file, which can be found at the root of the source code       *\n\
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *\n\
+ * If you do not have access to either file, you may request a copy from     *\n\
+ * help@hdfgroup.org.                                                        *\n\
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *";
 /*
  *
- * Created:	H5detect.c
- *		10 Aug 1997
- *		Robb Matzke
+ * Created:    H5detect.c
+ *        10 Aug 1997
+ *        Robb Matzke
  *
- * Purpose:	This code was borrowed heavily from the `detect.c'
- *		program in the AIO distribution from Lawrence
- *		Livermore National Laboratory.
+ * Purpose:    This code was borrowed heavily from the `detect.c'
+ *        program in the AIO distribution from Lawrence
+ *        Livermore National Laboratory.
  *
- *		Detects machine byte order and floating point
- *		format and generates a C source file (H5Tinit.c)
- *		to describe those paramters.
+ *        Detects machine byte order and floating point
+ *        format and generates a C source file (H5Tinit.c)
+ *        to describe those parameters.
  *
  * Assumptions: We have an ANSI compiler.  We're on a Unix like
- *		system or configure has detected those Unix
- *		features which aren't available.  We're not
- *		running on a Vax or other machine with mixed
- *		endianess.
+ *        system or configure has detected those Unix
+ *        features which aren't available.  We're not
+ *        running on a Vax or other machine with mixed
+ *        endianess.
  *
  * Modifications:
  *
@@ -58,9 +54,19 @@ static const char *FileHeader = "\n\
 #include "H5Tpublic.h"
 #include "H5Rpublic.h"
 
+#if defined(__has_attribute)
+#if __has_attribute(no_sanitize)
+#define HDF_NO_UBSAN __attribute__((no_sanitize("undefined")))
+#else
+#define HDF_NO_UBSAN
+#endif
+#else
+#define HDF_NO_UBSAN
+#endif
+
 #define MAXDETECT 64
 
-/* The ALIGNMENT test code may generate the SIGBUS, SIGSEGV, or SIGILL signals. 
+/* The ALIGNMENT test code may generate the SIGBUS, SIGSEGV, or SIGILL signals.
  * We use setjmp/longjmp in the signal handlers for recovery. But setjmp/longjmp
  * do not necessary restore the signal blocking status while sigsetjmp/siglongjmp
  * do. If sigsetjmp/siglongjmp are not supported, need to use sigprocmask to
@@ -69,20 +75,20 @@ static const char *FileHeader = "\n\
 /* Define H5SETJMP/H5LONGJMP depending on if sigsetjmp/siglongjmp are */
 /* supported. */
 #if defined(H5_HAVE_SIGSETJMP) && defined(H5_HAVE_SIGLONGJMP)
-/* Always save blocked signals to be restore by siglongjmp. */
-#define H5JMP_BUF	sigjmp_buf
-#define H5SETJMP(buf)	HDsigsetjmp(buf, 1)
-#define H5LONGJMP(buf, val)	HDsiglongjmp(buf, val)
-#define H5HAVE_SIGJMP		/* sigsetjmp/siglongjmp are supported. */
+/* Always save blocked signals to be restored by siglongjmp. */
+#define H5JMP_BUF    sigjmp_buf
+#define H5SETJMP(buf)    HDsigsetjmp(buf, 1)
+#define H5LONGJMP(buf, val)    HDsiglongjmp(buf, val)
+#define H5HAVE_SIGJMP        /* sigsetjmp/siglongjmp are supported. */
 #elif defined(H5_HAVE_LONGJMP)
-#define H5JMP_BUF	jmp_buf
-#define H5SETJMP(buf)	HDsetjmp(buf)
-#define H5LONGJMP(buf, val)	HDlongjmp(buf, val)
+#define H5JMP_BUF    jmp_buf
+#define H5SETJMP(buf)    HDsetjmp(buf)
+#define H5LONGJMP(buf, val)    HDlongjmp(buf, val)
 #endif
 
 /* ALIGNMENT and signal-handling status codes */
-#define STA_NoALIGNMENT		0x0001  /* No ALIGNMENT Test */
-#define STA_NoHandlerVerify	0x0002  /* No signal handler Tests */
+#define STA_NoALIGNMENT        0x0001  /* No ALIGNMENT Test */
+#define STA_NoHandlerVerify    0x0002  /* No signal handler Tests */
 
 
 /*
@@ -137,11 +143,11 @@ static void detect_C99_integers32(void);
 static void detect_C99_integers64(void);
 static void detect_alignments(void);
 static unsigned int align_g[] = {1, 2, 4, 8, 16};
-static int align_status_g = 0;		/* ALIGNMENT Signal Status */
-static int sigbus_handler_called_g = 0;	/* how many times called */
+static int align_status_g = 0;        /* ALIGNMENT Signal Status */
+static int sigbus_handler_called_g = 0;    /* how many times called */
 static int sigsegv_handler_called_g = 0;/* how many times called */
-static int sigill_handler_called_g = 0;	/* how many times called */
-static int signal_handler_tested_g = 0;	/* how many times tested */
+static int sigill_handler_called_g = 0;    /* how many times called */
+static int signal_handler_tested_g = 0;    /* how many times tested */
 #if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
 static int verify_signal_handlers(int signum, void (*handler)(int));
 #endif
@@ -149,16 +155,16 @@ static int verify_signal_handlers(int signum, void (*handler)(int));
 static H5JMP_BUF jbuf_g;
 #endif
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	precision
+ * Function:    precision
  *
- * Purpose:	Determine the precision and offset.
+ * Purpose:    Determine the precision and offset.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		Thursday, June 18, 1998
+ * Programmer:    Robb Matzke
+ *        Thursday, June 18, 1998
  *
  * Modifications:
  *
@@ -171,7 +177,7 @@ precision (detected_t *d)
 
     if (0 == d->msize) {
         /*
-         * An integer.	The permutation can have negative values at the
+         * An integer.    The permutation can have negative values at the
          * beginning or end which represent padding of bytes.  We must adjust
          * the precision and offset accordingly.
          */
@@ -205,36 +211,36 @@ precision (detected_t *d)
     }
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	DETECT_I/DETECT_BYTE
+ * Function:    DETECT_I/DETECT_BYTE
  *
- * Purpose:	These macro takes a type like `int' and a base name like
- *		`nati' and detects the byte order.  The VAR is used to
- *		construct the names of the C variables defined.
+ * Purpose:    These macro takes a type like `int' and a base name like
+ *        `nati' and detects the byte order.  The VAR is used to
+ *        construct the names of the C variables defined.
  *
  *              DETECT_I is used for types that are larger than one byte,
  *              DETECT_BYTE is used for types that are exactly one byte.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12 1996
  *
  * Modifications:
  *
- *	Robb Matzke, 4 Nov 1996
- *	The INFO.perm now contains `-1' for bytes that aren't used and
- *	are always zero.  This happens on the Cray for `short' where
- *	sizeof(short) is 8, but only the low-order 4 bytes are ever used.
+ *    Robb Matzke, 4 Nov 1996
+ *    The INFO.perm now contains `-1' for bytes that aren't used and
+ *    are always zero.  This happens on the Cray for `short' where
+ *    sizeof(short) is 8, but only the low-order 4 bytes are ever used.
  *
- *	Robb Matzke, 4 Nov 1996
- *	Added a `padding' field to indicate how many zero bytes appear to
- *	the left (N) or right (-N) of the value.
+ *    Robb Matzke, 4 Nov 1996
+ *    Added a `padding' field to indicate how many zero bytes appear to
+ *    the left (N) or right (-N) of the value.
  *
- *	Robb Matzke, 5 Nov 1996
- *	Removed HFILE and CFILE arguments.
+ *    Robb Matzke, 5 Nov 1996
+ *    Removed HFILE and CFILE arguments.
  *
  *      Neil Fortner, 6 Sep 2013
  *      Split macro into DETECT_I and DETECT_BYTE macros, extracted
@@ -277,27 +283,27 @@ precision (detected_t *d)
     DETECT_I_BYTE_CORE(TYPE,VAR,INFO,int)                                     \
 }
 
-#define DETECT_I(TYPE,VAR,INFO) {					      \
+#define DETECT_I(TYPE,VAR,INFO) {                          \
     HDcompile_assert(sizeof(TYPE) > 1);                                       \
                                                                               \
     DETECT_I_BYTE_CORE(TYPE,VAR,INFO,TYPE)                                    \
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	DETECT_F
+ * Function:    DETECT_F
  *
- * Purpose:	This macro takes a floating point type like `double' and
- *		a base name like `natd' and detects byte order, mantissa
- *		location, exponent location, sign bit location, presence or
- *		absence of implicit mantissa bit, and exponent bias and
- *		initializes a detected_t structure with those properties.
+ * Purpose:    This macro takes a floating point type like `double' and
+ *        a base name like `natd' and detects byte order, mantissa
+ *        location, exponent location, sign bit location, presence or
+ *        absence of implicit mantissa bit, and exponent bias and
+ *        initializes a detected_t structure with those properties.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12 1996
  *
  *-------------------------------------------------------------------------
  */
@@ -387,31 +393,31 @@ precision (detected_t *d)
     }                                                                         \
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	DETECT_M
+ * Function:    DETECT_M
  *
- * Purpose:	This macro takes only miscellaneous structures or pointer
+ * Purpose:    This macro takes only miscellaneous structures or pointer
  *              (pointer, hvl_t, hobj_ref_t, hdset_reg_ref_t).  It
- *		constructs the names and decides the alignment in structure.
+ *        constructs the names and decides the alignment in structure.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Raymond Lu
- *		slu@ncsa.uiuc.edu
- *		Dec 9, 2002
+ * Programmer:    Raymond Lu
+ *        slu@ncsa.uiuc.edu
+ *        Dec 9, 2002
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
-#define DETECT_M(TYPE,VAR,INFO) {					      \
-   INFO.name = #VAR;							      \
-   COMP_ALIGNMENT(TYPE, INFO.comp_align);				      \
+#define DETECT_M(TYPE,VAR,INFO) {                          \
+   INFO.name = #VAR;                                  \
+   COMP_ALIGNMENT(TYPE, INFO.comp_align);                      \
 }
 
 /* Detect alignment for C structure */
-#define COMP_ALIGNMENT(TYPE,COMP_ALIGN) {			              \
+#define COMP_ALIGNMENT(TYPE,COMP_ALIGN) {                          \
     struct {                                                                  \
         char    c;                                                            \
         TYPE    x;                                                            \
@@ -421,67 +427,67 @@ precision (detected_t *d)
 }
 
 #if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
-#define ALIGNMENT(TYPE,INFO) {						      \
-    char *volatile _buf = NULL;   					      \
-    TYPE _val = 1, _val2;						      \
-    volatile size_t	_ano = 0;					      \
-    void		(*_handler)(int) = HDsignal(SIGBUS, sigbus_handler);  \
-    void		(*_handler2)(int) = HDsignal(SIGSEGV, sigsegv_handler);\
-    void		(*_handler3)(int) = HDsignal(SIGILL, sigill_handler);  \
-									      \
-    _buf = (char*)HDmalloc(sizeof(TYPE) + align_g[NELMTS(align_g) - 1]);	      \
-    if(H5SETJMP(jbuf_g)) _ano++;					      \
-    if(_ano < NELMTS(align_g)) {					      \
-	*((TYPE*)(_buf+align_g[_ano])) = _val; /*possible SIGBUS or SEGSEGV*/ \
-	_val2 = *((TYPE*)(_buf+align_g[_ano]));	/*possible SIGBUS or SEGSEGV*/\
-	/* Cray Check: This section helps detect alignment on Cray's */	      \
+#define ALIGNMENT(TYPE,INFO) {                              \
+    char *volatile _buf = NULL;                             \
+    TYPE _val = 1, _val2;                              \
+    volatile size_t    _ano = 0;                          \
+    void        (*_handler)(int) = HDsignal(SIGBUS, sigbus_handler);  \
+    void        (*_handler2)(int) = HDsignal(SIGSEGV, sigsegv_handler);\
+    void        (*_handler3)(int) = HDsignal(SIGILL, sigill_handler);  \
+                                        \
+    _buf = (char*)HDmalloc(sizeof(TYPE) + align_g[NELMTS(align_g) - 1]);          \
+    if(H5SETJMP(jbuf_g)) _ano++;                          \
+    if(_ano < NELMTS(align_g)) {                          \
+    *((TYPE*)(_buf+align_g[_ano])) = _val; /*possible SIGBUS or SEGSEGV*/ \
+    _val2 = *((TYPE*)(_buf+align_g[_ano]));    /*possible SIGBUS or SEGSEGV*/\
+    /* Cray Check: This section helps detect alignment on Cray's */          \
         /*              vector machines (like the SV1) which mask off */      \
-	/*              pointer values when pointing to non-word aligned */   \
-	/*              locations with pointers that are supposed to be */    \
-	/*              word aligned. -QAK */                                 \
-	HDmemset(_buf, 0xff, sizeof(TYPE)+align_g[NELMTS(align_g)-1]);	      \
+    /*              pointer values when pointing to non-word aligned */   \
+    /*              locations with pointers that are supposed to be */    \
+    /*              word aligned. -QAK */                                 \
+    HDmemset(_buf, 0xff, sizeof(TYPE)+align_g[NELMTS(align_g)-1]);          \
         /*How to handle VAX types?*/                                          \
-	if(INFO.perm[0]) /* Big-Endian */				      \
-	    HDmemcpy(_buf+align_g[_ano]+(INFO.size-((INFO.offset+INFO.precision)/8)),((char *)&_val)+(INFO.size-((INFO.offset+INFO.precision)/8)),(size_t)(INFO.precision/8)); \
-	else /* Little-Endian */					      \
-	    HDmemcpy(_buf+align_g[_ano]+(INFO.offset/8),((char *)&_val)+(INFO.offset/8),(size_t)(INFO.precision/8)); \
-	_val2 = *((TYPE*)(_buf+align_g[_ano]));				      \
-    H5_GCC_DIAG_OFF(float-equal)					      \
-	if(_val!=_val2)							      \
-	    H5LONGJMP(jbuf_g, 1);		        		      \
-    H5_GCC_DIAG_ON(float-equal) 					      \
-	/* End Cray Check */						      \
-	(INFO.align)=align_g[_ano];					      \
-    } else {								      \
-	(INFO.align)=0;							      \
-	fprintf(stderr, "unable to calculate alignment for %s\n", #TYPE);     \
-    }									      \
-    HDfree(_buf);								      \
-    HDsignal(SIGBUS, _handler); /*restore original handler*/		      \
-    HDsignal(SIGSEGV, _handler2); /*restore original handler*/		      \
-    HDsignal(SIGILL, _handler3); /*restore original handler*/		      \
+    if(INFO.perm[0]) /* Big-Endian */                      \
+        HDmemcpy(_buf+align_g[_ano]+(INFO.size-((INFO.offset+INFO.precision)/8)),((char *)&_val)+(INFO.size-((INFO.offset+INFO.precision)/8)),(size_t)(INFO.precision/8)); \
+    else /* Little-Endian */                          \
+        HDmemcpy(_buf+align_g[_ano]+(INFO.offset/8),((char *)&_val)+(INFO.offset/8),(size_t)(INFO.precision/8)); \
+    _val2 = *((TYPE*)(_buf+align_g[_ano]));                      \
+    H5_GCC_DIAG_OFF(float-equal)                          \
+    if(_val!=_val2)                                  \
+        H5LONGJMP(jbuf_g, 1);                              \
+    H5_GCC_DIAG_ON(float-equal)                           \
+    /* End Cray Check */                              \
+    (INFO.align)=align_g[_ano];                          \
+    } else {                                      \
+    (INFO.align)=0;                                  \
+    fprintf(stderr, "unable to calculate alignment for %s\n", #TYPE);     \
+    }                                          \
+    HDfree(_buf);                                      \
+    HDsignal(SIGBUS, _handler); /*restore original handler*/              \
+    HDsignal(SIGSEGV, _handler2); /*restore original handler*/              \
+    HDsignal(SIGILL, _handler3); /*restore original handler*/              \
 }
 #else
-#define ALIGNMENT(TYPE,INFO) {						      \
-    align_status_g |= STA_NoALIGNMENT;					      \
-    (INFO.align)=0;							      \
+#define ALIGNMENT(TYPE,INFO) {                              \
+    align_status_g |= STA_NoALIGNMENT;                          \
+    (INFO.align)=0;                                  \
 }
 #endif
 
-
+
 #if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 /*-------------------------------------------------------------------------
- * Function:	sigsegv_handler
+ * Function:    sigsegv_handler
  *
- * Purpose:	Handler for SIGSEGV. We use signal() instead of sigaction()
- *		because it's more portable to non-Posix systems. Although
- *		it's not nearly as nice to work with, it does the job for
- *		this simple stuff.
+ * Purpose:    Handler for SIGSEGV. We use signal() instead of sigaction()
+ *        because it's more portable to non-Posix systems. Although
+ *        it's not nearly as nice to work with, it does the job for
+ *        this simple stuff.
  *
- * Return:	Returns via H5LONGJMP to jbuf_g.
+ * Return:    Returns via H5LONGJMP to jbuf_g.
  *
- * Programmer:	Robb Matzke
- *		Thursday, March 18, 1999
+ * Programmer:    Robb Matzke
+ *        Thursday, March 18, 1999
  *
  * Modifications:
  *
@@ -506,20 +512,20 @@ sigsegv_handler(int H5_ATTR_UNUSED signo)
 }
 #endif
 
-
+
 #if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 /*-------------------------------------------------------------------------
- * Function:	sigbus_handler
+ * Function:    sigbus_handler
  *
- * Purpose:	Handler for SIGBUS. We use signal() instead of sigaction()
- *		because it's more portable to non-Posix systems. Although
- *		it's not nearly as nice to work with, it does the job for
- *		this simple stuff.
+ * Purpose:    Handler for SIGBUS. We use signal() instead of sigaction()
+ *        because it's more portable to non-Posix systems. Although
+ *        it's not nearly as nice to work with, it does the job for
+ *        this simple stuff.
  *
- * Return:	Returns via H5LONGJMP to jbuf_g.
+ * Return:    Returns via H5LONGJMP to jbuf_g.
  *
- * Programmer:	Robb Matzke
- *		Thursday, March 18, 1999
+ * Programmer:    Robb Matzke
+ *        Thursday, March 18, 1999
  *
  * Modifications:
  *
@@ -544,20 +550,20 @@ sigbus_handler(int H5_ATTR_UNUSED signo)
 }
 #endif
 
-
+
 #if defined(H5LONGJMP) && defined(H5_HAVE_SIGNAL)
 /*-------------------------------------------------------------------------
- * Function:	sigill_handler
+ * Function:    sigill_handler
  *
- * Purpose:	Handler for SIGILL. We use signal() instead of sigaction()
- *		because it's more portable to non-Posix systems. Although
- *		it's not nearly as nice to work with, it does the job for
- *		this simple stuff.
+ * Purpose:    Handler for SIGILL. We use signal() instead of sigaction()
+ *        because it's more portable to non-Posix systems. Although
+ *        it's not nearly as nice to work with, it does the job for
+ *        this simple stuff.
  *
- * Return:	Returns via H5LONGJMP to jbuf_g.
+ * Return:    Returns via H5LONGJMP to jbuf_g.
  *
- * Programmer:	Raymond Lu
- *		28 October 2013
+ * Programmer:    Raymond Lu
+ *        28 October 2013
  *
  *-------------------------------------------------------------------------
  */
@@ -580,17 +586,17 @@ sigill_handler(int H5_ATTR_UNUSED signo)
 }
 #endif
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	print_results
+ * Function:    print_results
  *
- * Purpose:	Prints information about the detected data types.
+ * Purpose:    Prints information about the detected data types.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 14, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 14, 1996
  *
  * Modifications:
  *
@@ -600,7 +606,7 @@ static void
 print_results(int nd, detected_t *d, int na, malign_t *misc_align)
 {
     int         byte_order=0;   /*byte order of data types*/
-    int		i, j;
+    int        i, j;
 
     /* Include files */
     printf("\
@@ -614,11 +620,11 @@ print_results(int nd, detected_t *d, int na, malign_t *misc_align)
 /***********/\n\
 /* Headers */\n\
 /***********/\n\
-#include \"H5private.h\"		/* Generic Functions			*/\n\
-#include \"H5Eprivate.h\"		/* Error handling		  	*/\n\
-#include \"H5FLprivate.h\"	/* Free Lists				*/\n\
-#include \"H5Iprivate.h\"		/* IDs			  		*/\n\
-#include \"H5Tpkg.h\"		/* Datatypes 				*/\n\
+#include \"H5private.h\"        /* Generic Functions            */\n\
+#include \"H5Eprivate.h\"        /* Error handling              */\n\
+#include \"H5FLprivate.h\"    /* Free Lists                */\n\
+#include \"H5Iprivate.h\"        /* IDs                      */\n\
+#include \"H5Tpkg.h\"        /* Datatypes                 */\n\
 \n\
 \n\
 /****************/\n\
@@ -667,15 +673,15 @@ print_results(int nd, detected_t *d, int na, malign_t *misc_align)
     printf("\n\
 \n\
 /*-------------------------------------------------------------------------\n\
- * Function:	H5T__init_native\n\
+ * Function:    H5T__init_native\n\
  *\n\
- * Purpose:	Initialize pre-defined native datatypes from code generated\n\
+ * Purpose:    Initialize pre-defined native datatypes from code generated\n\
  *              during the library configuration by H5detect.\n\
  *\n\
- * Return:	Success:	non-negative\n\
- *		Failure:	negative\n\
+ * Return:    Success:    non-negative\n\
+ *        Failure:    negative\n\
  *\n\
- * Programmer:	Robb Matzke\n\
+ * Programmer:    Robb Matzke\n\
  *              Wednesday, December 16, 1998\n\
  *\n\
  *-------------------------------------------------------------------------\n\
@@ -683,8 +689,8 @@ print_results(int nd, detected_t *d, int na, malign_t *misc_align)
 herr_t\n\
 H5T__init_native(void)\n\
 {\n\
-    H5T_t	*dt = NULL;\n\
-    herr_t	ret_value = SUCCEED;\n\
+    H5T_t    *dt = NULL;\n\
+    herr_t    ret_value = SUCCEED;\n\
 \n\
     FUNC_ENTER_PACKAGE\n");
 
@@ -706,20 +712,20 @@ H5T__init_native(void)\n\
             }
         }
 
-	/* Print a comment to describe this section of definitions. */
-	printf("\n   /*\n");
-	iprint(d+i);
-	printf("    */\n");
+    /* Print a comment to describe this section of definitions. */
+    printf("\n   /*\n");
+    iprint(d+i);
+    printf("    */\n");
 
-	/* The part common to fixed and floating types */
-	printf("\
+    /* The part common to fixed and floating types */
+    printf("\
     if(NULL == (dt = H5T__alloc()))\n\
         HGOTO_ERROR(H5E_DATATYPE, H5E_NOSPACE, FAIL, \"datatype allocation failed\")\n\
     dt->shared->state = H5T_STATE_IMMUTABLE;\n\
     dt->shared->type = H5T_%s;\n\
     dt->shared->size = %d;\n",
-	       d[i].msize ? "FLOAT" : "INTEGER",/*class			*/
-	       d[i].size);			/*size			*/
+        d[i].msize ? "FLOAT" : "INTEGER",/*class            */
+        d[i].size);            /*size            */
 
         if(byte_order==-1)
             printf("\
@@ -736,18 +742,18 @@ H5T__init_native(void)\n\
     dt->shared->u.atomic.prec = %d;\n\
     dt->shared->u.atomic.lsb_pad = H5T_PAD_ZERO;\n\
     dt->shared->u.atomic.msb_pad = H5T_PAD_ZERO;\n",
-	       d[i].offset,			/*offset		*/
-	       d[i].precision);			/*precision		*/
+        d[i].offset,            /*offset        */
+        d[i].precision);            /*precision        */
     /*HDassert((d[i].perm[0]>0)==(byte_order>0));*/   /* Double-check that byte-order doesn't change */
 
-	if (0 == d[i].msize) {
-	    /* The part unique to fixed point types */
-	    printf("\
+    if (0 == d[i].msize) {
+        /* The part unique to fixed point types */
+        printf("\
     dt->shared->u.atomic.u.i.sign = H5T_SGN_%s;\n",
-		   d[i].sign ? "2" : "NONE");
-	} else {
-	    /* The part unique to floating point types */
-	    printf("\
+        d[i].sign ? "2" : "NONE");
+    } else {
+        /* The part unique to floating point types */
+        printf("\
     dt->shared->u.atomic.u.f.sign = %d;\n\
     dt->shared->u.atomic.u.f.epos = %d;\n\
     dt->shared->u.atomic.u.f.esize = %d;\n\
@@ -756,22 +762,22 @@ H5T__init_native(void)\n\
     dt->shared->u.atomic.u.f.msize = %d;\n\
     dt->shared->u.atomic.u.f.norm = H5T_NORM_%s;\n\
     dt->shared->u.atomic.u.f.pad = H5T_PAD_ZERO;\n",
-		   d[i].sign,	/*sign location */
-		   d[i].epos,	/*exponent loc	*/
-		   d[i].esize,	/*exponent size */
-		   (unsigned long)(d[i].bias),	 /*exponent bias */
-		   d[i].mpos,	/*mantissa loc	*/
-		   d[i].msize,	/*mantissa size */
-		   d[i].imp ? "IMPLIED" : "NONE");	/*normalization */
-	}
-
-	/* Atomize the type */
-	printf("\
+        d[i].sign,    /*sign location */
+        d[i].epos,    /*exponent loc    */
+        d[i].esize,    /*exponent size */
+        (unsigned long)(d[i].bias),     /*exponent bias */
+        d[i].mpos,    /*mantissa loc    */
+        d[i].msize,    /*mantissa size */
+        d[i].imp ? "IMPLIED" : "NONE");    /*normalization */
+    }
+
+    /* Atomize the type */
+    printf("\
     if((H5T_NATIVE_%s_g = H5I_register(H5I_DATATYPE, dt, FALSE)) < 0)\n\
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, \"can't register ID for built-in datatype\")\n",
-	       d[i].varname);
-	printf("    H5T_NATIVE_%s_ALIGN_g = %lu;\n",
-	       d[i].varname, (unsigned long)(d[i].align));
+        d[i].varname);
+    printf("    H5T_NATIVE_%s_ALIGN_g = %lu;\n",
+        d[i].varname, (unsigned long)(d[i].align));
 
         /* Variables for alignment of compound datatype */
         if(!HDstrcmp(d[i].varname, "SCHAR")  || !HDstrcmp(d[i].varname, "SHORT") ||
@@ -813,69 +819,69 @@ done:\n\
 
     /* Print the ALIGNMENT and signal-handling status as comments */
     printf("\n"
-	"/****************************************/\n"
-	"/* ALIGNMENT and signal-handling status */\n"
-	"/****************************************/\n");
+    "/****************************************/\n"
+    "/* ALIGNMENT and signal-handling status */\n"
+    "/****************************************/\n");
     if (align_status_g & STA_NoALIGNMENT)
-	printf("/* ALIGNAMENT test is not available */\n");
+    printf("/* ALIGNAMENT test is not available */\n");
     if (align_status_g & STA_NoHandlerVerify)
-	printf("/* Signal handlers verify test is not available */\n");
+    printf("/* Signal handlers verify test is not available */\n");
     /* The following is available in H5pubconf.h. Printing them here for */
     /* convenience. */
 #ifdef H5_HAVE_SIGNAL
-	printf("/* Signal() support: yes */\n");
+    printf("/* Signal() support: yes */\n");
 #else
-	printf("/* Signal() support: no */\n");
+    printf("/* Signal() support: no */\n");
 #endif
 #ifdef H5_HAVE_SETJMP
-	printf("/* setjmp() support: yes */\n");
+    printf("/* setjmp() support: yes */\n");
 #else
-	printf("/* setjmp() support: no */\n");
+    printf("/* setjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_LONGJMP
-	printf("/* longjmp() support: yes */\n");
+    printf("/* longjmp() support: yes */\n");
 #else
-	printf("/* longjmp() support: no */\n");
+    printf("/* longjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_SIGSETJMP
-	printf("/* sigsetjmp() support: yes */\n");
+    printf("/* sigsetjmp() support: yes */\n");
 #else
-	printf("/* sigsetjmp() support: no */\n");
+    printf("/* sigsetjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_SIGLONGJMP
-	printf("/* siglongjmp() support: yes */\n");
+    printf("/* siglongjmp() support: yes */\n");
 #else
-	printf("/* siglongjmp() support: no */\n");
+    printf("/* siglongjmp() support: no */\n");
 #endif
 #ifdef H5_HAVE_SIGPROCMASK
-	printf("/* sigprocmask() support: yes */\n");
+    printf("/* sigprocmask() support: yes */\n");
 #else
-	printf("/* sigprocmask() support: no */\n");
+    printf("/* sigprocmask() support: no */\n");
 #endif
 
     /* Print the statics of signal handlers called for debugging */
     printf("\n"
-	"/******************************/\n"
-	"/* signal handlers statistics */\n"
-	"/******************************/\n");
+    "/******************************/\n"
+    "/* signal handlers statistics */\n"
+    "/******************************/\n");
     printf("/* signal_handlers tested: %d times */\n", signal_handler_tested_g);
     printf("/* sigbus_handler called: %d times */\n", sigbus_handler_called_g);
     printf("/* sigsegv_handler called: %d times */\n", sigsegv_handler_called_g);
     printf("/* sigill_handler called: %d times */\n", sigill_handler_called_g);
 } /* end print_results() */
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	iprint
+ * Function:    iprint
  *
- * Purpose:	Prints information about the fields of a floating point
- *		format.
+ * Purpose:    Prints information about the fields of a floating point
+ *        format.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
@@ -949,22 +955,22 @@ iprint(detected_t *d)
 
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	byte_cmp
+ * Function:    byte_cmp
  *
- * Purpose:	Compares two chunks of memory A and B and returns the
- *		byte index into those arrays of the first byte that
- *		differs between A and B.  Ignores differences where the
+ * Purpose:    Compares two chunks of memory A and B and returns the
+ *        byte index into those arrays of the first byte that
+ *        differs between A and B.  Ignores differences where the
  *              corresponding bit in pad_mask is set to 0.
  *
- * Return:	Success:	Index of differing byte.
+ * Return:    Success:    Index of differing byte.
  *
- *		Failure:	-1 if all bytes are the same.
+ *        Failure:    -1 if all bytes are the same.
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12, 1996
  *
  * Modifications:
  *
@@ -984,17 +990,17 @@ byte_cmp(int n, const void *_a, const void *_b, const unsigned char *pad_mask)
     return -1;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	bit_cmp
+ * Function:    bit_cmp
  *
- * Purpose:	Compares two bit vectors and returns the index for the
- *		first bit that differs between the two vectors.	 The
- *		size of the vector is NBYTES.  PERM is a mapping from
- *		actual order to little endian.  Ignores differences where
+ * Purpose:    Compares two bit vectors and returns the index for the
+ *        first bit that differs between the two vectors.     The
+ *        size of the vector is NBYTES.  PERM is a mapping from
+ *        actual order to little endian.  Ignores differences where
  *              the corresponding bit in pad_mask is set to 0.
  *
- * Return:	Index of first differing bit.
+ * Return:    Index of first differing bit.
  *
  *-------------------------------------------------------------------------
  */
@@ -1025,23 +1031,23 @@ bit_cmp(unsigned int nbytes, int *perm, void *_a, void *_b,
     return 0;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	fix_order
+ * Function:    fix_order
  *
- * Purpose:	Given an array PERM with elements FIRST through LAST
- *		initialized with zero origin byte numbers, this function
- *		creates a permutation vector that maps the actual order
- *		of a floating point number to little-endian.
+ * Purpose:    Given an array PERM with elements FIRST through LAST
+ *        initialized with zero origin byte numbers, this function
+ *        creates a permutation vector that maps the actual order
+ *        of a floating point number to little-endian.
  *
- *		This function assumes that the mantissa byte ordering
- *		implies the total ordering.
+ *        This function assumes that the mantissa byte ordering
+ *        implies the total ordering.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
@@ -1050,81 +1056,81 @@ bit_cmp(unsigned int nbytes, int *perm, void *_a, void *_b,
 static void
 fix_order(int n, int last, int *perm, const char **mesg)
 {
-    int		i;
+    int        i;
 
     if (last > 1) {
-	/*
-	 * We have at least three points to consider.
-	 */
-	if (perm[last] < perm[last - 1] && perm[last - 1] < perm[last - 2]) {
-	    /*
-	     * Little endian.
-	     */
-	    if (mesg) *mesg = "Little-endian";
-	    for (i = 0; i < n; i++) perm[i] = i;
-
-	} else if (perm[last] > perm[last-1] && perm[last-1] > perm[last-2]) {
-	    /*
-	     * Big endian.
-	     */
-	    if (mesg) *mesg = "Big-endian";
-	    for (i = 0; i < n; i++) perm[i] = (n - 1) - i;
-
-	} else {
-	    /*
-	     * Bi-endian machines like VAX.
+    /*
+    * We have at least three points to consider.
+    */
+    if (perm[last] < perm[last - 1] && perm[last - 1] < perm[last - 2]) {
+        /*
+        * Little endian.
+        */
+        if (mesg) *mesg = "Little-endian";
+        for (i = 0; i < n; i++) perm[i] = i;
+
+    } else if (perm[last] > perm[last-1] && perm[last-1] > perm[last-2]) {
+        /*
+        * Big endian.
+        */
+        if (mesg) *mesg = "Big-endian";
+        for (i = 0; i < n; i++) perm[i] = (n - 1) - i;
+
+    } else {
+        /*
+        * Bi-endian machines like VAX.
              * (NOTE: This is not an actual determination of the VAX-endianess.
              *          It could have some other endianess and fall into this
              *          case - JKM & QAK)
-	     */
-	    HDassert(0 == n % 2);
-	    if (mesg) *mesg = "VAX";
-	    for (i = 0; i < n; i += 2) {
-		perm[i] = (n - 2) - i;
-		perm[i + 1] = (n - 1) - i;
-	    }
-	}
+        */
+        HDassert(0 == n % 2);
+        if (mesg) *mesg = "VAX";
+        for (i = 0; i < n; i += 2) {
+        perm[i] = (n - 2) - i;
+        perm[i + 1] = (n - 1) - i;
+        }
+    }
     } else {
-	fprintf(stderr,
-	     "Failed to detect byte order of %d-byte floating point.\n", n);
-	HDexit(1);
+    fprintf(stderr,
+        "Failed to detect byte order of %d-byte floating point.\n", n);
+    HDexit(1);
     }
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	imp_bit
+ * Function:    imp_bit
  *
- * Purpose:	Looks for an implicit bit in the mantissa.  The value
- *		of _A should be 1.0 and the value of _B should be 0.5.
- *		Some floating-point formats discard the most significant
- *		bit of the mantissa after normalizing since it will always
- *		be a one (except for 0.0).  If this is true for the native
- *		floating point values stored in _A and _B then the function
- *		returns non-zero.
+ * Purpose:    Looks for an implicit bit in the mantissa.  The value
+ *        of _A should be 1.0 and the value of _B should be 0.5.
+ *        Some floating-point formats discard the most significant
+ *        bit of the mantissa after normalizing since it will always
+ *        be a one (except for 0.0).  If this is true for the native
+ *        floating point values stored in _A and _B then the function
+ *        returns non-zero.
  *
- *		This function assumes that the exponent occupies higher
- *		order bits than the mantissa and that the most significant
- *		bit of the mantissa is next to the least signficant bit
- *		of the exponent.
+ *        This function assumes that the exponent occupies higher
+ *        order bits than the mantissa and that the most significant
+ *        bit of the mantissa is next to the least signficant bit
+ *        of the exponent.
  *
  *
- * Return:	Success:	Non-zero if the most significant bit
- *				of the mantissa is discarded (ie, the
- *				mantissa has an implicit `one' as the
- *				most significant bit).	Otherwise,
- *				returns zero.
+ * Return:    Success:    Non-zero if the most significant bit
+ *                of the mantissa is discarded (ie, the
+ *                mantissa has an implicit `one' as the
+ *                most significant bit).    Otherwise,
+ *                returns zero.
  *
- *		Failure:	exit(1)
+ *        Failure:    exit(1)
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
- *	Robb Matzke, 6 Nov 1996
- *	Fixed a bug that occurs with non-implicit architectures.
+ *    Robb Matzke, 6 Nov 1996
+ *    Fixed a bug that occurs with non-implicit architectures.
  *
  *-------------------------------------------------------------------------
  */
@@ -1154,26 +1160,26 @@ imp_bit(unsigned int n, int *perm, void *_a, void *_b, const unsigned char *pad_
     return (a[perm[major]] >> minor) & 0x01 ? 0 : 1;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	find_bias
+ * Function:    find_bias
  *
- * Purpose:	Determines the bias of the exponent.  This function should
- *		be called with _A having a value of `1'.
+ * Purpose:    Determines the bias of the exponent.  This function should
+ *        be called with _A having a value of `1'.
  *
- * Return:	Success:	The exponent bias.
+ * Return:    Success:    The exponent bias.
  *
- *		Failure:
+ *        Failure:
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 13, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 13, 1996
  *
  * Modifications:
  *
- *	Robb Matzke, 6 Nov 1996
- *	Fixed a bug with non-implicit architectures returning the
- *	wrong exponent bias.
+ *    Robb Matzke, 6 Nov 1996
+ *    Fixed a bug with non-implicit architectures returning the
+ *    wrong exponent bias.
  *
  *-------------------------------------------------------------------------
  */
@@ -1197,17 +1203,17 @@ find_bias(unsigned int epos, unsigned int esize, int *perm, void *_a)
     return bias;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	print_header
+ * Function:    print_header
  *
- * Purpose:	Prints the C file header for the generated file.
+ * Purpose:    Prints the C file header for the generated file.
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Mar 12 1997
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Mar 12 1997
  *
  * Modifications:
  *
@@ -1217,22 +1223,22 @@ static void
 print_header(void)
 {
 
-    time_t		now = HDtime(NULL);
-    struct tm		*tm = HDlocaltime(&now);
-    char		real_name[30];
-    char		host_name[256];
-    int			i;
-    const char		*s;
+    time_t        now = HDtime(NULL);
+    struct tm        *tm = HDlocaltime(&now);
+    char        real_name[30];
+    char        host_name[256];
+    int            i;
+    const char        *s;
 #ifdef H5_HAVE_GETPWUID
-    struct passwd	*pwd = NULL;
+    struct passwd    *pwd = NULL;
 #else
-    int			pwd = 1;
+    int            pwd = 1;
 #endif
-    static const char	*month_name[] =
+    static const char    *month_name[] =
     {
-	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
-	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-    static const char	*purpose = "\
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
+    static const char    *purpose = "\
 This machine-generated source code contains\n\
 information about the various integer and\n\
 floating point numeric formats found on this\n\
@@ -1244,7 +1250,7 @@ Each of the numeric formats listed below are\n\
 printed from most significant bit to least\n\
 significant bit even though the actual bytes\n\
 might be stored in a different order in\n\
-memory.	 The integers above each binary byte\n\
+memory.     The integers above each binary byte\n\
 indicate the relative order of the bytes in\n\
 memory; little-endian machines have\n\
 decreasing numbers while big-endian machines\n\
@@ -1255,8 +1261,8 @@ letters with `S' for the mantissa sign bit,\n\
 `M' for the mantissa magnitude, and `E' for\n\
 the exponent.  The exponent has an associated\n\
 bias which can be subtracted to find the\n\
-true exponent.	The radix point is assumed\n\
-to be before the first `M' bit.	 Any bit\n\
+true exponent.    The radix point is assumed\n\
+to be before the first `M' bit.     Any bit\n\
 of a floating-point value not falling into one\n\
 of these categories is printed as a question\n\
 mark.  Bits of integer types are printed as\n\
@@ -1275,20 +1281,20 @@ bit.\n";
      */
 #ifdef H5_HAVE_GETPWUID
     {
-	size_t n;
-	char *comma;
-	if ((pwd = HDgetpwuid(HDgetuid()))) {
-	    if ((comma = HDstrchr(pwd->pw_gecos, ','))) {
-		n = MIN(sizeof(real_name)-1, (unsigned)(comma-pwd->pw_gecos));
-		HDstrncpy(real_name, pwd->pw_gecos, n);
-		real_name[n] = '\0';
-	    } else {
-		HDstrncpy(real_name, pwd->pw_gecos, sizeof(real_name));
-		real_name[sizeof(real_name) - 1] = '\0';
-	    }
-	} else {
-	    real_name[0] = '\0';
-	}
+    size_t n;
+    char *comma;
+    if ((pwd = HDgetpwuid(HDgetuid()))) {
+        if ((comma = HDstrchr(pwd->pw_gecos, ','))) {
+        n = MIN(sizeof(real_name)-1, (unsigned)(comma-pwd->pw_gecos));
+        HDstrncpy(real_name, pwd->pw_gecos, n);
+        real_name[n] = '\0';
+        } else {
+        HDstrncpy(real_name, pwd->pw_gecos, sizeof(real_name));
+        real_name[sizeof(real_name) - 1] = '\0';
+        }
+    } else {
+        real_name[0] = '\0';
+    }
     }
 #else
     real_name[0] = '\0';
@@ -1299,7 +1305,7 @@ bit.\n";
      */
 #ifdef H5_HAVE_GETHOSTNAME
     if (HDgethostname(host_name, sizeof(host_name)) < 0) {
-	host_name[0] = '\0';
+    host_name[0] = '\0';
     }
 #else
     host_name[0] = '\0';
@@ -1309,24 +1315,24 @@ bit.\n";
      * The file header: warning, copyright notice, build information.
      */
     printf("/* Generated automatically by H5detect -- do not edit */\n\n\n");
-    HDputs(FileHeader);		/*the copyright notice--see top of this file */
+    HDputs(FileHeader);        /*the copyright notice--see top of this file */
 
     printf(" *\n * Created:\t\t%s %2d, %4d\n",
-	   month_name[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year);
+    month_name[tm->tm_mon], tm->tm_mday, 1900 + tm->tm_year);
     if (pwd || real_name[0] || host_name[0]) {
-	printf(" *\t\t\t");
-	if (real_name[0]) printf("%s <", real_name);
+    printf(" *\t\t\t");
+    if (real_name[0]) printf("%s <", real_name);
 #ifdef H5_HAVE_GETPWUID
-	if (pwd) HDfputs(pwd->pw_name, stdout);
+    if (pwd) HDfputs(pwd->pw_name, stdout);
 #endif
-	if (host_name[0]) printf("@%s", host_name);
-	if (real_name[0]) printf(">");
-	HDputchar('\n');
+    if (host_name[0]) printf("@%s", host_name);
+    if (real_name[0]) printf(">");
+    HDputchar('\n');
     }
     printf(" *\n * Purpose:\t\t");
     for (s = purpose; *s; s++) {
-	HDputchar(*s);
-	if ('\n' == *s && s[1]) printf(" *\t\t\t");
+    HDputchar(*s);
+    if ('\n' == *s && s[1]) printf(" *\t\t\t");
     }
 
     printf(" *\n * Modifications:\n *\n");
@@ -1339,84 +1345,84 @@ bit.\n";
 
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C89_integers
+ * Function:    detect_C89_integers
  *
- * Purpose:	Detect C89 integer types
+ * Purpose:    Detect C89 integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C89_integers(void)
+detect_C89_integers(void) HDF_NO_UBSAN
 {
-    DETECT_BYTE(signed char,	  SCHAR,        d_g[nd_g]); nd_g++;
-    DETECT_BYTE(unsigned char,	  UCHAR,        d_g[nd_g]); nd_g++;
-    DETECT_I(short,		  SHORT,        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned short,	  USHORT,       d_g[nd_g]); nd_g++;
-    DETECT_I(int,		  INT,	        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned int,	  UINT,	        d_g[nd_g]); nd_g++;
-    DETECT_I(long,		  LONG,	        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned long,	  ULONG,        d_g[nd_g]); nd_g++;
+    DETECT_BYTE(signed char,      SCHAR,        d_g[nd_g]); nd_g++;
+    DETECT_BYTE(unsigned char,      UCHAR,        d_g[nd_g]); nd_g++;
+    DETECT_I(short,          SHORT,        d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned short,      USHORT,       d_g[nd_g]); nd_g++;
+    DETECT_I(int,          INT,            d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned int,      UINT,            d_g[nd_g]); nd_g++;
+    DETECT_I(long,          LONG,            d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned long,      ULONG,        d_g[nd_g]); nd_g++;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C89_floats
+ * Function:    detect_C89_floats
  *
- * Purpose:	Detect C89 floating point types
+ * Purpose:    Detect C89 floating point types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C89_floats(void)
+detect_C89_floats(void) HDF_NO_UBSAN
 {
     DETECT_F(float,     FLOAT,      d_g[nd_g]); nd_g++;
     DETECT_F(double,    DOUBLE,     d_g[nd_g]); nd_g++;
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers8
+ * Function:    detect_C99_integers8
  *
- * Purpose:	Detect C99 8 bit integer types
+ * Purpose:    Detect C99 8 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers8(void)
+detect_C99_integers8(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT8_T>0
   #if H5_SIZEOF_INT8_T==1
     DETECT_BYTE(int8_t,           INT8,         d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(int8_t, 		  INT8,         d_g[nd_g]); nd_g++;
+    DETECT_I(int8_t,           INT8,         d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_UINT8_T>0
   #if H5_SIZEOF_UINT8_T==1
-    DETECT_BYTE(uint8_t, 	  UINT8,        d_g[nd_g]); nd_g++;
+    DETECT_BYTE(uint8_t,       UINT8,        d_g[nd_g]); nd_g++;
   #else
     DETECT_I(uint8_t,             UINT8,        d_g[nd_g]); nd_g++;
   #endif
@@ -1425,147 +1431,147 @@ detect_C99_integers8(void)
   #if H5_SIZEOF_INT_LEAST8_T==1
     DETECT_BYTE(int_least8_t,     INT_LEAST8,   d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(int_least8_t, 	  INT_LEAST8,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_least8_t,       INT_LEAST8,   d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_UINT_LEAST8_T>0
   #if H5_SIZEOF_UINT_LEAST8_T==1
     DETECT_BYTE(uint_least8_t,    UINT_LEAST8,  d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(uint_least8_t, 	  UINT_LEAST8,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least8_t,       UINT_LEAST8,  d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_INT_FAST8_T>0
   #if H5_SIZEOF_INT_FAST8_T==1
     DETECT_BYTE(int_fast8_t,      INT_FAST8,    d_g[nd_g]); nd_g++;
   #else
-    DETECT_I(int_fast8_t, 	  INT_FAST8,    d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast8_t,       INT_FAST8,    d_g[nd_g]); nd_g++;
   #endif
 #endif
 #if H5_SIZEOF_UINT_FAST8_T>0
   #if H5_SIZEOF_UINT_FAST8_T==1
-    DETECT_BYTE(uint_fast8_t, 	  UINT_FAST8,   d_g[nd_g]); nd_g++;
+    DETECT_BYTE(uint_fast8_t,       UINT_FAST8,   d_g[nd_g]); nd_g++;
   #else
     DETECT_I(uint_fast8_t,     UINT_FAST8,   d_g[nd_g]); nd_g++;
   #endif
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers16
+ * Function:    detect_C99_integers16
  *
- * Purpose:	Detect C99 16 bit integer types
+ * Purpose:    Detect C99 16 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers16(void)
+detect_C99_integers16(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT16_T>0
-    DETECT_I(int16_t, 		  INT16,        d_g[nd_g]); nd_g++;
+    DETECT_I(int16_t,           INT16,        d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT16_T>0
-    DETECT_I(uint16_t, 		  UINT16,       d_g[nd_g]); nd_g++;
+    DETECT_I(uint16_t,           UINT16,       d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_LEAST16_T>0
-    DETECT_I(int_least16_t, 	  INT_LEAST16,  d_g[nd_g]); nd_g++;
+    DETECT_I(int_least16_t,       INT_LEAST16,  d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_LEAST16_T>0
-    DETECT_I(uint_least16_t, 	  UINT_LEAST16, d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least16_t,       UINT_LEAST16, d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_FAST16_T>0
-    DETECT_I(int_fast16_t, 	  INT_FAST16,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast16_t,       INT_FAST16,   d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_FAST16_T>0
-    DETECT_I(uint_fast16_t, 	  UINT_FAST16,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_fast16_t,       UINT_FAST16,  d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers32
+ * Function:    detect_C99_integers32
  *
- * Purpose:	Detect C99 32 bit integer types
+ * Purpose:    Detect C99 32 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers32(void)
+detect_C99_integers32(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT32_T>0
-    DETECT_I(int32_t, 		  INT32,        d_g[nd_g]); nd_g++;
+    DETECT_I(int32_t,           INT32,        d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT32_T>0
-    DETECT_I(uint32_t, 		  UINT32,       d_g[nd_g]); nd_g++;
+    DETECT_I(uint32_t,           UINT32,       d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_LEAST32_T>0
-    DETECT_I(int_least32_t, 	  INT_LEAST32,  d_g[nd_g]); nd_g++;
+    DETECT_I(int_least32_t,       INT_LEAST32,  d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_LEAST32_T>0
-    DETECT_I(uint_least32_t, 	  UINT_LEAST32, d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least32_t,       UINT_LEAST32, d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_FAST32_T>0
-    DETECT_I(int_fast32_t, 	  INT_FAST32,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast32_t,       INT_FAST32,   d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_FAST32_T>0
-    DETECT_I(uint_fast32_t, 	  UINT_FAST32,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_fast32_t,       UINT_FAST32,  d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers64
+ * Function:    detect_C99_integers64
  *
- * Purpose:	Detect C99 64 bit integer types
+ * Purpose:    Detect C99 64 bit integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers64(void)
+detect_C99_integers64(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_INT64_T>0
-    DETECT_I(int64_t, 		  INT64,        d_g[nd_g]); nd_g++;
+    DETECT_I(int64_t,           INT64,        d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT64_T>0
-    DETECT_I(uint64_t, 		  UINT64,       d_g[nd_g]); nd_g++;
+    DETECT_I(uint64_t,           UINT64,       d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_LEAST64_T>0
-    DETECT_I(int_least64_t, 	  INT_LEAST64,  d_g[nd_g]); nd_g++;
+    DETECT_I(int_least64_t,       INT_LEAST64,  d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_LEAST64_T>0
-    DETECT_I(uint_least64_t, 	  UINT_LEAST64, d_g[nd_g]); nd_g++;
+    DETECT_I(uint_least64_t,       UINT_LEAST64, d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_INT_FAST64_T>0
-    DETECT_I(int_fast64_t, 	  INT_FAST64,   d_g[nd_g]); nd_g++;
+    DETECT_I(int_fast64_t,       INT_FAST64,   d_g[nd_g]); nd_g++;
 #endif
 #if H5_SIZEOF_UINT_FAST64_T>0
-    DETECT_I(uint_fast64_t, 	  UINT_FAST64,  d_g[nd_g]); nd_g++;
+    DETECT_I(uint_fast64_t,       UINT_FAST64,  d_g[nd_g]); nd_g++;
 #endif
 
 #if H5_SIZEOF_LONG_LONG>0
-    DETECT_I(long long,		  LLONG,        d_g[nd_g]); nd_g++;
+    DETECT_I(long long,          LLONG,        d_g[nd_g]); nd_g++;
     DETECT_I(unsigned long long,  ULLONG,       d_g[nd_g]); nd_g++;
 #else
     /*
@@ -1573,28 +1579,28 @@ detect_C99_integers64(void)
      * so we'll just make H5T_NATIVE_LLONG the same as H5T_NATIVE_LONG since
      * `long long' is probably equivalent to `long' here anyway.
      */
-    DETECT_I(long,		  LLONG,        d_g[nd_g]); nd_g++;
-    DETECT_I(unsigned long,	  ULLONG,       d_g[nd_g]); nd_g++;
+    DETECT_I(long,          LLONG,        d_g[nd_g]); nd_g++;
+    DETECT_I(unsigned long,      ULLONG,       d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_integers
+ * Function:    detect_C99_integers
  *
- * Purpose:	Detect C99 integer types
+ * Purpose:    Detect C99 integer types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_integers(void)
+detect_C99_integers(void) HDF_NO_UBSAN
 {
     /* break it down to more subroutines so that each module subroutine */
     /* is smaller and takes less time to compile with optimization on.  */
@@ -1604,23 +1610,23 @@ detect_C99_integers(void)
     detect_C99_integers64();
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_C99_floats
+ * Function:    detect_C99_floats
  *
- * Purpose:	Detect C99 floating point types
+ * Purpose:    Detect C99 floating point types
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_C99_floats(void)
+detect_C99_floats(void) HDF_NO_UBSAN
 {
 #if H5_SIZEOF_DOUBLE == H5_SIZEOF_LONG_DOUBLE
     /*
@@ -1629,29 +1635,29 @@ detect_C99_floats(void)
      * some systems and `long double' is probably the same as `double' here
      * anyway.
      */
-    DETECT_F(double,		  LDOUBLE,      d_g[nd_g]); nd_g++;
+    DETECT_F(double,          LDOUBLE,      d_g[nd_g]); nd_g++;
 #elif H5_SIZEOF_LONG_DOUBLE !=0
-    DETECT_F(long double,	  LDOUBLE,      d_g[nd_g]); nd_g++;
+    DETECT_F(long double,      LDOUBLE,      d_g[nd_g]); nd_g++;
 #endif
 }
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	detect_alignments
+ * Function:    detect_alignments
  *
- * Purpose:	Detect structure alignments
+ * Purpose:    Detect structure alignments
  *
- * Return:	void
+ * Return:    void
  *
- * Programmer:	Albert Cheng
- *		2004/05/20
+ * Programmer:    Albert Cheng
+ *        2004/05/20
  *
  * Modifications:
  *
  *-------------------------------------------------------------------------
  */
 static void
-detect_alignments(void)
+detect_alignments(void) HDF_NO_UBSAN
 {
     /* Detect structure alignment for pointers, hvl_t, hobj_ref_t, hdset_reg_ref_t */
     DETECT_M(void *,              POINTER,      m_g[na_g]); na_g++;
@@ -1660,7 +1666,7 @@ detect_alignments(void)
     DETECT_M(hdset_reg_ref_t,     HDSETREGREF,  m_g[na_g]); na_g++;
 }
 
-
+
 #if defined(H5SETJMP) && defined(H5_HAVE_SIGNAL)
 /* Verify the signal handler for signal signum works correctly multiple times.
  * One possible cause of failure is that the signal handling is blocked or
@@ -1668,64 +1674,70 @@ detect_alignments(void)
  * Return  0 for success, -1 for failure.
  */
 static int verify_signal_handlers(int signum, void (*handler)(int))
-{						      
-    void	(*save_handler)(int) = HDsignal(signum, handler);    
+{
+#if defined(__has_feature)
+#if __has_feature(address_sanitizer) || __has_feature(thread_sanitizer)
+    /* Under the address and thread sanitizers, don't raise any signals. */
+    return 0;
+#endif
+#endif
+    void    (*save_handler)(int) = HDsignal(signum, handler);
     volatile int i, val;
     int ntries=5;
     volatile int nfailures=0;
     volatile int nsuccesses=0;
-									      
-    for (i=0;i<ntries; i++){    
-	val=H5SETJMP(jbuf_g);
-	if (val==0)
-	{    
-	    /* send self the signal to trigger the handler */    
-	    signal_handler_tested_g++;
-	    HDraise(signum);    
-	    /* Should not reach here. Record error. */
-	    nfailures++;
-	}else{
-	    if (val==signum){ 
-		/* return from signum handler. Record a sucess. */
-		nsuccesses++;
-	    }else{
-		fprintf(stderr, "Unknown return value (%d) from H5SETJMP",
-		    val);    
-		nfailures++;
-	    }
-	}
-    }    
+
+    for (i=0;i<ntries; i++){
+    val=H5SETJMP(jbuf_g);
+    if (val==0)
+    {
+        /* send self the signal to trigger the handler */
+        signal_handler_tested_g++;
+        HDraise(signum);
+        /* Should not reach here. Record error. */
+        nfailures++;
+    }else{
+        if (val==signum){
+        /* return from signum handler. Record a sucess. */
+        nsuccesses++;
+        }else{
+        fprintf(stderr, "Unknown return value (%d) from H5SETJMP",
+            val);
+        nfailures++;
+        }
+    }
+    }
     /* restore save handler, check results and report failures */
     HDsignal(signum, save_handler);
     if (nfailures>0 || nsuccesses != ntries){
-	fprintf(stderr, "verify_signal_handlers for signal %d did %d tries. "
-	       "Found %d failures and %d successes\n",
-	       signum, ntries, nfailures, nsuccesses);
-	return(-1);
+    fprintf(stderr, "verify_signal_handlers for signal %d did %d tries. "
+        "Found %d failures and %d successes\n",
+        signum, ntries, nfailures, nsuccesses);
+    return(-1);
     }else{
-	/* all succeeded */
-	return(0);
+    /* all succeeded */
+    return(0);
     }
-}    
+}
 #endif
 
-
+
 /*-------------------------------------------------------------------------
- * Function:	main
+ * Function:    main
  *
- * Purpose:	Main entry point.
+ * Purpose:    Main entry point.
  *
- * Return:	Success:	exit(0)
+ * Return:    Success:    exit(0)
  *
- *		Failure:	exit(1)
+ *        Failure:    exit(1)
  *
- * Programmer:	Robb Matzke
- *		matzke@llnl.gov
- *		Jun 12, 1996
+ * Programmer:    Robb Matzke
+ *        matzke@llnl.gov
+ *        Jun 12, 1996
  *
  * Modifications:
- *	Albert Cheng, 2004/05/20
- *	Some compilers, e.g., Intel C v7.0, took a long time to compile
+ *    Albert Cheng, 2004/05/20
+ *    Some compilers, e.g., Intel C v7.0, took a long time to compile
  *      with optimization when a module routine contains many code lines.
  *      Divide up all those types detections macros into subroutines, both
  *      to avoid the compiler optimization error and cleaner codes.
@@ -1733,7 +1745,7 @@ static int verify_signal_handlers(int signum, void (*handler)(int))
  *-------------------------------------------------------------------------
  */
 int
-main(void)
+main(void) HDF_NO_UBSAN
 {
 
 #if defined(H5_HAVE_SETSYSINFO) && defined(SSI_NVPAIRS)
@@ -1742,12 +1754,12 @@ main(void)
      * Make sure unaligned access generates SIGBUS and doesn't print warning
      * messages so that we can detect alignment constraints on the DEC Alpha.
      */
-    int			nvpairs[2];
+    int            nvpairs[2];
     nvpairs[0] = SSIN_UACPROC;
     nvpairs[1] = UAC_NOPRINT | UAC_SIGBUS;
     if (setsysinfo(SSI_NVPAIRS, nvpairs, 1, 0, 0)<0) {
-	fprintf(stderr, "H5detect: unable to turn off UAC handling: %s\n",
-		HDstrerror(errno));
+    fprintf(stderr, "H5detect: unable to turn off UAC handling: %s\n",
+        HDstrerror(errno));
     }
 #endif
 #endif
diff --git a/src/H5err.txt b/src/H5err.txt
index ffa9315..19374cd 100644
--- a/src/H5err.txt
+++ b/src/H5err.txt
@@ -4,12 +4,10 @@
 #
 # This file is part of HDF5.  The full HDF5 copyright notice, including
 # terms governing use, modification, and redistribution, is contained in
-# the files COPYING and Copyright.html.  COPYING can be found at the root
-# of the source code distribution tree; Copyright.html can be found at the
-# root level of an installed copy of the electronic HDF5 document set and
-# is linked from the top-level documents page.  It can also be found at
-# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
-# access to either file, you may request a copy from help@hdfgroup.org.
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
 #
 
 # This file is used to generate the various headers that are needed for the
@@ -78,6 +76,7 @@ MAJOR, H5E_EARRAY, Extensible Array
 MAJOR, H5E_FARRAY, Fixed Array
 MAJOR, H5E_PLUGIN, Plugin for dynamically loaded library
 MAJOR, H5E_PAGEBUF, Page Buffering
+MAJOR, H5E_CONTEXT, API Context
 MAJOR, H5E_NONE_MAJOR, No error
 
 # Sections (for grouping minor errors)
@@ -245,6 +244,8 @@ MINOR, LINK, H5E_CANTSORT, Can't sort objects
 MINOR, MPI, H5E_MPI, Some MPI function failed
 MINOR, MPI, H5E_MPIERRSTR, MPI Error String
 MINOR, MPI, H5E_CANTRECV, Can't receive data
+MINOR, MPI, H5E_CANTGATHER, Can't gather data
+MINOR, MPI, H5E_NO_INDEPENDENT, Can't perform independent IO
 
 # Heap errors
 MINOR, HEAP, H5E_CANTRESTORE, Can't restore condition
diff --git a/src/H5make_libsettings.c b/src/H5make_libsettings.c
index fa00c64..1892806 100644
--- a/src/H5make_libsettings.c
+++ b/src/H5make_libsettings.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*keep this declaration near the top of this file -RPM*/
@@ -22,12 +20,10 @@ static const char *FileHeader = "\n\
  *                                                                           *\n\
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *\n\
  * terms governing use, modification, and redistribution, is contained in    *\n\
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *\n\
- * of the source code distribution tree; Copyright.html can be found at the  *\n\
- * root level of an installed copy of the electronic HDF5 document set and   *\n\
- * is linked from the top-level documents page.  It can also be found at     *\n\
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *\n\
- * access to either file, you may request a copy from help@hdfgroup.org.     *\n\
+ * the COPYING file, which can be found at the root of the source code       *\n\
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *\n\
+ * If you do not have access to either file, you may request a copy from     *\n\
+ * help@hdfgroup.org.                                                        *\n\
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *";
 /*
  *
diff --git a/src/H5overflow.txt b/src/H5overflow.txt
index 3e9f069..a9e5099 100644
--- a/src/H5overflow.txt
+++ b/src/H5overflow.txt
@@ -4,12 +4,10 @@
 #
 # This file is part of HDF5.  The full HDF5 copyright notice, including
 # terms governing use, modification, and redistribution, is contained in
-# the files COPYING and Copyright.html.  COPYING can be found at the root
-# of the source code distribution tree; Copyright.html can be found at the
-# root level of an installed copy of the electronic HDF5 document set and
-# is linked from the top-level documents page.  It can also be found at
-# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
-# access to either file, you may request a copy from help@hdfgroup.org.
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
 #
 
 # This file is used to generate the headers that is needed for detecting
diff --git a/src/H5private.h b/src/H5private.h
index 61ecc5b..6334f39 100644
--- a/src/H5private.h
+++ b/src/H5private.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Robb Matzke <matzke@llnl.gov>
@@ -55,7 +53,6 @@
 #   include <limits.h>
 #   include <math.h>
 #   include <signal.h>
-#   include <stdarg.h>
 #   include <stdio.h>
 #   include <stdlib.h>
 #   include <string.h>
@@ -497,6 +494,15 @@
 #   define H5_POSIX_MAX_IO_BYTES        SSIZET_MAX
 #endif
 
+/* POSIX I/O mode used as the third parameter to open/_open
+ * when creating a new file (O_CREAT is set).
+ */
+#if defined(H5_HAVE_WIN32_API)
+#   define H5_POSIX_CREATE_MODE_RW      (_S_IREAD | _S_IWRITE)
+#else
+#   define H5_POSIX_CREATE_MODE_RW      0666
+#endif
+
 /*
  * A macro to portably increment enumerated types.
  */
@@ -1119,11 +1125,7 @@ typedef off_t               h5_stat_size_t;
     #define HDnanosleep(N, O)    nanosleep(N, O)
 #endif /* HDnanosleep */
 #ifndef HDopen
-    #ifdef _O_BINARY
-        #define HDopen(S,F,M)    open(S,F|_O_BINARY,M)
-    #else
-        #define HDopen(S,F,M)    open(S,F,M)
-    #endif
+    #define HDopen(F,...)    open(F,__VA_ARGS__)
 #endif /* HDopen */
 #ifndef HDopendir
     #define HDopendir(S)    opendir(S)
@@ -1685,25 +1687,25 @@ extern char *strdup(const char *s);
  *    information about the package in H5_init_library().
  */
 typedef enum {
-    H5_PKG_A,        /*Attributes      */
-    H5_PKG_AC,        /*Meta data cache    */
-    H5_PKG_B,        /*B-trees      */
-    H5_PKG_D,        /*Datasets      */
-    H5_PKG_E,        /*Error handling    */
-    H5_PKG_F,        /*Files        */
-    H5_PKG_G,        /*Groups      */
-    H5_PKG_HG,        /*Global heap      */
-    H5_PKG_HL,        /*Local heap      */
-    H5_PKG_I,        /*Interface      */
-    H5_PKG_MF,        /*File memory management  */
-    H5_PKG_MM,        /*Core memory management  */
-    H5_PKG_O,        /*Object headers    */
-    H5_PKG_P,        /*Property lists    */
-    H5_PKG_S,        /*Data spaces      */
-    H5_PKG_T,        /*Data types      */
-    H5_PKG_V,        /*Vector functions    */
-    H5_PKG_Z,        /*Raw data filters    */
-    H5_NPKGS        /*Must be last      */
+    H5_PKG_A,       /* Attributes               */
+    H5_PKG_AC,      /* Metadata cache           */
+    H5_PKG_B,       /* B-trees                  */
+    H5_PKG_D,       /* Datasets                 */
+    H5_PKG_E,       /* Error handling           */
+    H5_PKG_F,       /* Files                    */
+    H5_PKG_G,       /* Groups                   */
+    H5_PKG_HG,      /* Global heaps             */
+    H5_PKG_HL,      /* Local heaps              */
+    H5_PKG_I,       /* IDs                      */
+    H5_PKG_MF,      /* File memory management   */
+    H5_PKG_MM,      /* Core memory management   */
+    H5_PKG_O,       /* Object headers           */
+    H5_PKG_P,       /* Property lists           */
+    H5_PKG_S,       /* Dataspaces               */
+    H5_PKG_T,       /* Datatypes                */
+    H5_PKG_V,       /* Vector functions         */
+    H5_PKG_Z,       /* Raw data filters         */
+    H5_NPKGS        /* Must be last             */
 } H5_pkg_t;
 
 typedef struct H5_debug_open_stream_t {
@@ -1732,76 +1734,90 @@ extern H5_debug_t    H5_debug_g;
 extern char H5libhdf5_settings[]; /* embedded library information */
 
 /*-------------------------------------------------------------------------
- * Purpose:  These macros are inserted automatically just after the
- *    FUNC_ENTER() macro of API functions and are used to trace
- *    application program execution. Unless H5_DEBUG_API has been
- *    defined they are no-ops.
+ * Purpose: These macros are inserted automatically just after the
+ *          FUNC_ENTER() macro of API functions and are used to trace
+ *          application program execution. Unless H5_DEBUG_API has been
+ *          defined they are no-ops.
  *
- * Arguments:  R  - Return type encoded as a string
- *    T  - Argument types encoded as a string
- *    A0-An  - Arguments.  The number at the end of the macro name
- *        indicates the number of arguments.
+ * Arguments:   R  - Return type encoded as a string
+ *              T  - Argument types encoded as a string
+ *              A0-An  - Arguments.  The number at the end of the macro name
+ *                                   indicates the number of arguments.
  *
- * Programmer:  Robb Matzke
- *
- * Modifications:
  *-------------------------------------------------------------------------
  */
 #ifdef H5_DEBUG_API
-#define H5TRACE_DECL         const char *RTYPE=NULL;                                      \
-                                           double CALLTIME;
-#define H5TRACE0(R,T)         RTYPE=R;                                                     \
-             CALLTIME=H5_trace(NULL,FUNC,T)
-#define H5TRACE1(R,T,A0)       RTYPE=R;                                      \
-             CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0)
-#define H5TRACE2(R,T,A0,A1)       RTYPE=R;                                                     \
-             CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1)
-#define H5TRACE3(R,T,A0,A1,A2)       RTYPE=R;                                      \
-             CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2)
-#define H5TRACE4(R,T,A0,A1,A2,A3)     RTYPE=R;                                                     \
-             CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3)
-#define H5TRACE5(R,T,A0,A1,A2,A3,A4)     RTYPE=R;                                                     \
-             CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,   \
-                                                             #A4,A4)
-#define H5TRACE6(R,T,A0,A1,A2,A3,A4,A5)     RTYPE=R;                                                     \
-             CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,   \
-                                                             #A4,A4,#A5,A5)
-#define H5TRACE7(R,T,A0,A1,A2,A3,A4,A5,A6) RTYPE=R;                                                     \
-             CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,   \
-                                                             #A4,A4,#A5,A5,#A6,A6)
-#define H5TRACE8(R,T,A0,A1,A2,A3,A4,A5,A6,A7) RTYPE=R;                                                  \
-                                           CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,   \
-                                                             #A4,A4,#A5,A5,#A6,A6,#A7,A7)
-#define H5TRACE9(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8) RTYPE=R;                                               \
-                                           CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,   \
-                                                             #A4,A4,#A5,A5,#A6,A6,#A7,A7,#A8,A8)
-#define H5TRACE10(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9) RTYPE=R;                                           \
-                                           CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,   \
-                                                             #A4,A4,#A5,A5,#A6,A6,#A7,A7,#A8,A8,#A9,A9)
-#define H5TRACE11(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10) RTYPE=R;                                       \
-                                           CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,   \
-                                                             #A4,A4,#A5,A5,#A6,A6,#A7,A7,#A8,A8,#A9,A9, \
-                                                             #A10,A10)
-#define H5TRACE_RETURN(V)       if (RTYPE) {                                                 \
-                H5_trace(&CALLTIME,FUNC,RTYPE,NULL,V);                    \
-                RTYPE=NULL;                                               \
-             }
+
+#define H5TRACE_DECL                                                                                    \
+            const char *RTYPE = NULL;                                                                   \
+            double CALLTIME;
+
+#define H5TRACE0(R,T)                                                                                   \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T)
+#define H5TRACE1(R,T,A0)                                                                                \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0)
+#define H5TRACE2(R,T,A0,A1)                                                                             \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1)
+#define H5TRACE3(R,T,A0,A1,A2)                                                                          \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2)
+#define H5TRACE4(R,T,A0,A1,A2,A3)                                                                       \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3)
+#define H5TRACE5(R,T,A0,A1,A2,A3,A4)                                                                    \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4)
+#define H5TRACE6(R,T,A0,A1,A2,A3,A4,A5)                                                                 \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4,#A5,A5)
+#define H5TRACE7(R,T,A0,A1,A2,A3,A4,A5,A6)                                                              \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4,#A5,A5,#A6,A6)
+#define H5TRACE8(R,T,A0,A1,A2,A3,A4,A5,A6,A7)                                                           \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4,#A5,A5,#A6,A6,#A7,A7)
+#define H5TRACE9(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8)                                                        \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4,#A5,A5,#A6,A6,#A7,A7,      \
+                                          #A8,A8)
+#define H5TRACE10(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9)                                                    \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4,#A5,A5,#A6,A6,#A7,A7,      \
+                                          #A8,A8,#A9,A9)
+#define H5TRACE11(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10)                                                \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4,#A5,A5,#A6,A6,#A7,A7,      \
+                                          #A8,A8,#A9,A9,#A10,A10)
+#define H5TRACE12(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11)                                            \
+            RTYPE=R;                                                                                    \
+            CALLTIME=H5_trace(NULL,FUNC,T,#A0,A0,#A1,A1,#A2,A2,#A3,A3,#A4,A4,#A5,A5,#A6,A6,#A7,A7,      \
+                                          #A8,A8,#A9,A9,#A10,A10,#A11,A11)
+
+#define H5TRACE_RETURN(V)                                                                               \
+            if (RTYPE) {                                                                                \
+                H5_trace(&CALLTIME, FUNC, RTYPE, NULL, V);                                              \
+                RTYPE = NULL;                                                                           \
+            }
 #else
-#define H5TRACE_DECL                      /*void*/
-#define H5TRACE0(R,T)                      /*void*/
-#define H5TRACE1(R,T,A0)                    /*void*/
-#define H5TRACE2(R,T,A0,A1)                    /*void*/
-#define H5TRACE3(R,T,A0,A1,A2)                    /*void*/
-#define H5TRACE4(R,T,A0,A1,A2,A3)                  /*void*/
-#define H5TRACE5(R,T,A0,A1,A2,A3,A4)                  /*void*/
-#define H5TRACE6(R,T,A0,A1,A2,A3,A4,A5)                  /*void*/
-#define H5TRACE7(R,T,A0,A1,A2,A3,A4,A5,A6)              /*void*/
-#define H5TRACE8(R,T,A0,A1,A2,A3,A4,A5,A6,A7)           /*void*/
-#define H5TRACE9(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8)        /*void*/
-#define H5TRACE10(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9)    /*void*/
-#define H5TRACE11(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10) /*void*/
-#define H5TRACE_RETURN(V)                    /*void*/
-#endif
+#define H5TRACE_DECL                                            /*void*/
+#define H5TRACE0(R,T)                                           /*void*/
+#define H5TRACE1(R,T,A0)                                        /*void*/
+#define H5TRACE2(R,T,A0,A1)                                     /*void*/
+#define H5TRACE3(R,T,A0,A1,A2)                                  /*void*/
+#define H5TRACE4(R,T,A0,A1,A2,A3)                               /*void*/
+#define H5TRACE5(R,T,A0,A1,A2,A3,A4)                            /*void*/
+#define H5TRACE6(R,T,A0,A1,A2,A3,A4,A5)                         /*void*/
+#define H5TRACE7(R,T,A0,A1,A2,A3,A4,A5,A6)                      /*void*/
+#define H5TRACE8(R,T,A0,A1,A2,A3,A4,A5,A6,A7)                   /*void*/
+#define H5TRACE9(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8)                /*void*/
+#define H5TRACE10(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9)            /*void*/
+#define H5TRACE11(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10)        /*void*/
+#define H5TRACE12(R,T,A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11)    /*void*/
+#define H5TRACE_RETURN(V)                                       /*void*/
+#endif /* H5_DEBUG_API */
 
 H5_DLL double H5_trace(const double *calltime, const char *func, const char *type, ...);
 
@@ -1971,6 +1987,11 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
 #define H5_PACKAGE_INIT(pkg_init, err)
 #endif /* H5_MY_PKG */
 
+/* Forward declaration of H5CXpush() / H5CXpop() */
+/* (Including H5CXprivate.h creates bad circular dependencies - QAK, 3/18/2018) */
+H5_DLL herr_t H5CX_push(void);
+H5_DLL herr_t H5CX_pop(void);
+
 
 #ifndef NDEBUG
 #define FUNC_ENTER_CHECK_NAME(asrt)                                           \
@@ -2010,7 +2031,7 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
 /* Local variables for API routines */
 #define FUNC_ENTER_API_VARS                                                   \
     MPE_LOG_VARS                                                              \
-    H5TRACE_DECL
+    H5TRACE_DECL                                                              \
 
 #define FUNC_ENTER_API_COMMON                                                 \
     FUNC_ENTER_API_VARS                                                       \
@@ -2031,6 +2052,10 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
     /* Push the name of this function on the function stack */                \
     H5_PUSH_FUNC                                                              \
                                                                               \
+    /* Push the API context */                                                \
+    if(H5CX_push() < 0)                                                       \
+        HGOTO_ERROR(H5E_FUNC, H5E_CANTSET, err, "can't set API context")      \
+                                                                              \
     BEGIN_MPE_LOG
 
 /* Use this macro for all "normal" API functions */
@@ -2053,7 +2078,7 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
 /*
  * Use this macro for API functions that shouldn't perform _any_ initialization
  *      of the library or an interface, just perform tracing, etc.  Examples
- *      are: H5check_version, etc.
+ *      are: H5allocate_memory, H5is_library_threadsafe, etc.
  *
  */
 #define FUNC_ENTER_API_NOINIT {{                                              \
@@ -2152,23 +2177,19 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
 /* Use the following two macros as replacements for the FUNC_ENTER_NOAPI
  * and FUNC_ENTER_NOAPI_NOINIT macros when the function needs to set
  * up a metadata tag. */
-#define FUNC_ENTER_NOAPI_TAG(dxpl_id, tag, err) {                             \
+#define FUNC_ENTER_NOAPI_TAG(tag, err) {                                      \
     haddr_t prev_tag = HADDR_UNDEF;                                           \
-    hid_t tag_dxpl_id = dxpl_id;                                              \
                                                                               \
     FUNC_ENTER_COMMON(!H5_IS_API(FUNC));                                      \
-    if(H5AC_tag(tag_dxpl_id, tag, &prev_tag)<0)                               \
-        HGOTO_ERROR(H5_MY_PKG_ERR, H5E_CANTTAG, err, "unable to apply metadata tag") \
+    H5AC_tag(tag, &prev_tag);                                                 \
     FUNC_ENTER_NOAPI_INIT(err)                                                \
     if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
 
-#define FUNC_ENTER_NOAPI_NOINIT_TAG(dxpl_id, tag, err) {                      \
+#define FUNC_ENTER_NOAPI_NOINIT_TAG(tag) {                                    \
     haddr_t prev_tag = HADDR_UNDEF;                                           \
-    hid_t tag_dxpl_id = dxpl_id;                                              \
                                                                               \
     FUNC_ENTER_COMMON(!H5_IS_API(FUNC));                                      \
-    if(H5AC_tag(tag_dxpl_id, tag, &prev_tag)<0)                               \
-        HGOTO_ERROR(H5_MY_PKG_ERR, H5E_CANTTAG, err, "unable to apply metadata tag") \
+    H5AC_tag(tag, &prev_tag);                                                 \
     H5_PUSH_FUNC                                                              \
     if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
 
@@ -2178,6 +2199,12 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
     H5_PUSH_FUNC                                                              \
     if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
 
+/* Use this macro for all package-level functions that are VOL entry-points */
+#define FUNC_ENTER_PACKAGE_VOL {                                              \
+    FUNC_ENTER_COMMON(H5_IS_PKG(FUNC));                                       \
+    H5_PUSH_FUNC                                                              \
+    if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
+
 /* Use this macro for package-level functions which propgate errors, but don't issue them */
 #define FUNC_ENTER_PACKAGE_NOERR {                                            \
     FUNC_ENTER_COMMON_NOERR(H5_IS_PKG(FUNC));                                 \
@@ -2186,13 +2213,22 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
 
 /* Use the following macro as replacement for the FUNC_ENTER_PACKAGE
  * macro when the function needs to set up a metadata tag. */
-#define FUNC_ENTER_PACKAGE_TAG(dxpl_id, tag, err) {                           \
+#define FUNC_ENTER_PACKAGE_TAG(tag) {                                         \
     haddr_t prev_tag = HADDR_UNDEF;                                           \
-    hid_t tag_dxpl_id = dxpl_id;                                              \
                                                                               \
     FUNC_ENTER_COMMON(H5_IS_PKG(FUNC));                                       \
-    if(H5AC_tag(tag_dxpl_id, tag, &prev_tag) < 0)                             \
-        HGOTO_ERROR(H5_MY_PKG_ERR, H5E_CANTTAG, err, "unable to apply metadata tag") \
+    H5AC_tag(tag, &prev_tag);                                                 \
+    H5_PUSH_FUNC                                                              \
+    if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
+
+/* Use the following macro as replacement for the FUNC_ENTER_PACKAGE
+ * macro when the function needs to set up a metadata tag and is also a
+ * VOL entry-point. */
+#define FUNC_ENTER_PACKAGE_VOL_TAG(tag) {                                     \
+    haddr_t prev_tag = HADDR_UNDEF;                                           \
+                                                                              \
+    FUNC_ENTER_COMMON(H5_IS_PKG(FUNC));                                       \
+    H5AC_tag(tag, &prev_tag);                                                 \
     H5_PUSH_FUNC                                                              \
     if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
 
@@ -2202,6 +2238,12 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
     H5_PUSH_FUNC                                                              \
     if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
 
+/* Use this macro for all "normal" staticly-scoped functions that are VOL entry-points */
+#define FUNC_ENTER_STATIC_VOL {                                               \
+    FUNC_ENTER_COMMON(H5_IS_PKG(FUNC));                                       \
+    H5_PUSH_FUNC                                                              \
+    if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
+
 /* Use this macro for staticly-scoped functions which propgate errors, but don't issue them */
 #define FUNC_ENTER_STATIC_NOERR {                                             \
     FUNC_ENTER_COMMON_NOERR(H5_IS_PKG(FUNC));                                 \
@@ -2216,13 +2258,22 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
 
 /* Use the following macro as replacement for the FUNC_ENTER_STATIC
  * macro when the function needs to set up a metadata tag. */
-#define FUNC_ENTER_STATIC_TAG(dxpl_id, tag, err) {                            \
+#define FUNC_ENTER_STATIC_TAG(tag) {                                          \
     haddr_t prev_tag = HADDR_UNDEF;                                           \
-    hid_t tag_dxpl_id = dxpl_id;                                              \
                                                                               \
     FUNC_ENTER_COMMON(H5_IS_PKG(FUNC));                                       \
-    if(H5AC_tag(tag_dxpl_id, tag, &prev_tag) < 0)                             \
-        HGOTO_ERROR(H5_MY_PKG_ERR, H5E_CANTTAG, err, "unable to apply metadata tag") \
+    H5AC_tag(tag, &prev_tag);                                                 \
+    H5_PUSH_FUNC                                                              \
+    if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
+
+/* Use the following macro as replacement for the FUNC_ENTER_STATIC
+ * macro when the function needs to set up a metadata tag and is a VOL
+ * entry-point. */
+#define FUNC_ENTER_STATIC_VOL_TAG(tag) {                                      \
+    haddr_t prev_tag = HADDR_UNDEF;                                           \
+                                                                              \
+    FUNC_ENTER_COMMON(H5_IS_PKG(FUNC));                                       \
+    H5AC_tag(tag, &prev_tag);                                                 \
     H5_PUSH_FUNC                                                              \
     if(H5_PKG_INIT_VAR || !H5_TERM_GLOBAL) {
 
@@ -2240,11 +2291,15 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
     H5_API_UNLOCK                                                             \
     H5_API_SET_CANCEL
 
-#define FUNC_LEAVE_API(ret_value)                                             \
+#define FUNC_LEAVE_API_COMMON(ret_value)                                      \
         ;                                                                     \
     } /*end scope from end of FUNC_ENTER*/                                    \
     FINISH_MPE_LOG                                                            \
-    H5TRACE_RETURN(ret_value);                                                \
+    H5TRACE_RETURN(ret_value);
+
+#define FUNC_LEAVE_API(ret_value)                                             \
+    FUNC_LEAVE_API_COMMON(ret_value);                                         \
+    (void)H5CX_pop();                                                         \
     H5_POP_FUNC                                                               \
     if(err_occurred)                                                          \
        (void)H5E_dump_api_stack(TRUE);                                        \
@@ -2252,12 +2307,19 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
     return(ret_value);                                                        \
 }} /*end scope from beginning of FUNC_ENTER*/
 
-/* Use this macro to match the FUNC_ENTER_API_NOFS macro */
+/* Use this macro to match the FUNC_ENTER_API_NOINIT macro */
+#define FUNC_LEAVE_API_NOINIT(ret_value)                                      \
+    FUNC_LEAVE_API_COMMON(ret_value);                                         \
+    H5_POP_FUNC                                                               \
+    if(err_occurred)                                                          \
+       (void)H5E_dump_api_stack(TRUE);                                        \
+    FUNC_LEAVE_API_THREADSAFE                                                 \
+    return(ret_value);                                                        \
+}} /*end scope from beginning of FUNC_ENTER*/
+
+/* Use this macro to match the FUNC_ENTER_API_NOINIT_NOERR_NOFS macro */
 #define FUNC_LEAVE_API_NOFS(ret_value)                                        \
-        ;                                                                     \
-    } /*end scope from end of FUNC_ENTER*/                                    \
-    FINISH_MPE_LOG                                                            \
-    H5TRACE_RETURN(ret_value);                                                \
+    FUNC_LEAVE_API_COMMON(ret_value);                                         \
     FUNC_LEAVE_API_THREADSAFE                                                 \
     return(ret_value);                                                        \
 }} /*end scope from beginning of FUNC_ENTER*/
@@ -2269,6 +2331,13 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
     return(ret_value);                                                        \
 } /*end scope from beginning of FUNC_ENTER*/
 
+#define FUNC_LEAVE_NOAPI_VOL(ret_value)                                       \
+        ;                                                                     \
+    } /*end scope from end of FUNC_ENTER*/                                    \
+    H5_POP_FUNC                                                               \
+    return(ret_value);                                                        \
+} /*end scope from beginning of FUNC_ENTER*/
+
 #define FUNC_LEAVE_NOAPI_VOID                                                 \
         ;                                                                     \
     } /*end scope from end of FUNC_ENTER*/                                    \
@@ -2288,11 +2357,19 @@ extern hbool_t H5_MPEinit_g;   /* Has the MPE Library been initialized? */
 } /*end scope from beginning of FUNC_ENTER*/
 
 /* Use this macro when exiting a function that set up a metadata tag */
-#define FUNC_LEAVE_NOAPI_TAG(ret_value, err)                                  \
+#define FUNC_LEAVE_NOAPI_TAG(ret_value)                                       \
         ;                                                                     \
     } /*end scope from end of FUNC_ENTER*/                                    \
-    if(H5AC_tag(tag_dxpl_id, prev_tag, NULL) < 0)                             \
-        HDONE_ERROR(H5E_CACHE, H5E_CANTTAG, err, "unable to apply metadata tag") \
+    H5AC_tag(prev_tag, NULL);                                                 \
+    H5_POP_FUNC                                                               \
+    return(ret_value);                                                        \
+} /*end scope from beginning of FUNC_ENTER*/
+
+/* Use this macro when exiting a VOL entry-point function that set up a metadata tag */
+#define FUNC_LEAVE_NOAPI_VOL_TAG(ret_value)                                   \
+        ;                                                                     \
+    } /*end scope from end of FUNC_ENTER*/                                    \
+    H5AC_tag(prev_tag, NULL);                                                 \
     H5_POP_FUNC                                                               \
     return(ret_value);                                                        \
 } /*end scope from beginning of FUNC_ENTER*/
@@ -2550,15 +2627,12 @@ func_init_failed:                                                             \
 
 /* Macro to begin/end tagging (when FUNC_ENTER_*TAG macros are insufficient).
  * Make sure to use HGOTO_ERROR_TAG and HGOTO_DONE_TAG between these macros! */
-#define H5_BEGIN_TAG(dxpl, tag, err) {                                           \
-    haddr_t prv_tag = HADDR_UNDEF;                                               \
-    hid_t my_dxpl_id = dxpl;                                                     \
-    if(H5AC_tag(my_dxpl_id, tag, &prv_tag) < 0)                                  \
-        HGOTO_ERROR(H5_MY_PKG_ERR, H5E_CANTTAG, err, "unable to apply metadata tag")
-
-#define H5_END_TAG(err)                                                          \
-    if(H5AC_tag(my_dxpl_id, prv_tag, NULL) <0)                                   \
-        HGOTO_ERROR(H5_MY_PKG_ERR, H5E_CANTTAG, err, "unable to apply metadata tag") \
+#define H5_BEGIN_TAG(tag) {                                                 \
+    haddr_t prv_tag = HADDR_UNDEF;                                          \
+    H5AC_tag(tag, &prv_tag);                                                \
+
+#define H5_END_TAG                                                          \
+    H5AC_tag(prv_tag, NULL);                                                \
 }
 
 /* Compile-time "assert" macro */
@@ -2576,6 +2650,7 @@ H5_DLL void H5_term_library(void);
 H5_DLL int H5A_term_package(void);
 H5_DLL int H5A_top_term_package(void);
 H5_DLL int H5AC_term_package(void);
+H5_DLL int H5CX_term_package(void);
 H5_DLL int H5D_term_package(void);
 H5_DLL int H5D_top_term_package(void);
 H5_DLL int H5E_term_package(void);
diff --git a/src/H5public.h b/src/H5public.h
index cab90aa..9157366 100644
--- a/src/H5public.h
+++ b/src/H5public.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -41,6 +39,7 @@
 #endif
 #ifdef H5_STDC_HEADERS
 #   include <limits.h>		/*for H5T_NATIVE_CHAR defn in H5Tpublic.h    */
+#   include <stdarg.h>      /*for variadic functions in H5VLpublic.h     */
 #endif
 #ifndef __cplusplus
 # ifdef H5_HAVE_STDINT_H
@@ -94,10 +93,10 @@ extern "C" {
 /* Version numbers */
 #define H5_VERS_MAJOR	1	/* For major interface/format changes  	     */
 #define H5_VERS_MINOR	11	/* For minor interface/format changes  	     */
-#define H5_VERS_RELEASE	0	/* For tweaks, bug-fixes, or development     */
+#define H5_VERS_RELEASE	2	/* For tweaks, bug-fixes, or development     */
 #define H5_VERS_SUBRELEASE ""	/* For pre-releases like snap0       */
 				/* Empty string for real releases.           */
-#define H5_VERS_INFO    "HDF5 library version: 1.11.0"      /* Full version string */
+#define H5_VERS_INFO    "HDF5 library version: 1.11.2"      /* Full version string */
 
 #define H5check()	H5check_version(H5_VERS_MAJOR,H5_VERS_MINOR,	      \
 				        H5_VERS_RELEASE)
diff --git a/src/H5system.c b/src/H5system.c
index 1f92e19..719b7e0 100644
--- a/src/H5system.c
+++ b/src/H5system.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -979,7 +977,7 @@ Wround(double arg)
 float
 Wroundf(float arg)
 {
-    return arg < 0.0F ? HDceil(arg - 0.5F) : HDfloor(arg + 0.5F);
+    return (float)(arg < 0.0F ? HDceil(arg - 0.5F) : HDfloor(arg + 0.5F));
 }
 
 #endif /* H5_HAVE_WIN32_API */
@@ -1045,7 +1043,7 @@ H5_build_extpath(const char *name, char **extpath /*out*/)
          * Unix: does not apply
          */
         if(H5_CHECK_ABS_DRIVE(name)) {
-            drive = name[0] - 'A' + 1;
+            drive = HDtoupper(name[0]) - 'A' + 1;
             retcwd = HDgetdcwd(drive, cwdpath, MAX_PATH_LEN);
             HDstrncpy(new_name, &name[2], name_len);
         } /* end if */
@@ -1239,3 +1237,49 @@ H5_get_time(void)
 } /* end H5_get_time() */
 
 
+#ifdef H5_HAVE_WIN32_API
+
+#define H5_WIN32_ENV_VAR_BUFFER_SIZE    32767
+
+
+/*-------------------------------------------------------------------------
+ * Function:    H5_expand_windows_env_vars()
+ *
+ * Purpose:     Replaces windows environment variables of the form %foo%
+ *              with user-specific values.
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5_expand_windows_env_vars(char **env_var)
+{
+    long    n_chars = 0;
+    char   *temp_buf = NULL;
+    herr_t  ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /* Allocate buffer for expanded environment variable string */
+    if (NULL == (temp_buf = (char *)H5MM_calloc((size_t)H5_WIN32_ENV_VAR_BUFFER_SIZE)))
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTALLOC, FAIL, "can't allocate memory for expanded path")
+
+    /* Expand the environment variable string */
+    if ((n_chars = ExpandEnvironmentStringsA(*env_var, temp_buf, H5_WIN32_ENV_VAR_BUFFER_SIZE)) > H5_WIN32_ENV_VAR_BUFFER_SIZE)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_NOSPACE, FAIL, "expanded path is too long")
+
+    if (0 == n_chars)
+        HGOTO_ERROR(H5E_PLUGIN, H5E_CANTGET, FAIL, "failed to expand path")
+
+    *env_var = (char *)H5MM_xfree(*env_var);
+    *env_var = temp_buf;
+
+done:
+    if (FAIL == ret_value && temp_buf)
+        temp_buf = (char *)H5MM_xfree(temp_buf);
+
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5_expand_windows_env_vars() */
+#endif /* H5_HAVE_WIN32_API */
+
diff --git a/src/H5timer.c b/src/H5timer.c
index f36681e..0ba8bd1 100644
--- a/src/H5timer.c
+++ b/src/H5timer.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
diff --git a/src/H5trace.c b/src/H5trace.c
index c4e5473..eef268c 100644
--- a/src/H5trace.c
+++ b/src/H5trace.c
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*-------------------------------------------------------------------------
@@ -176,26 +174,26 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             if(H5_debug_g.ttimes) {
                 char tmp[128];
 
-                sprintf(tmp, "%.6f", event_time.etime-first_time.etime);
-                fprintf(out, " %*s ", (int)HDstrlen(tmp), "");
+                HDsprintf(tmp, "%.6f", event_time.etime-first_time.etime);
+                HDfprintf(out, " %*s ", (int)HDstrlen(tmp), "");
             } /* end if */
             for(i = 0; i < current_depth; i++)
                 HDfputc('+', out);
-            fprintf(out, "%*s%s = ", 2*current_depth, "", func);
+            HDfprintf(out, "%*s%s = ", 2*current_depth, "", func);
         } /* end if */
         else {
             /* Continue current line with return value */
-            fprintf(out, " = ");
+            HDfprintf(out, " = ");
         } /* end else */
     } /* end if */
     else {
         if(current_depth>last_call_depth)
             HDfputs(" = <delayed>\n", out);
         if(H5_debug_g.ttimes)
-            fprintf(out, "@%.6f ", event_time.etime - first_time.etime);
+            HDfprintf(out, "@%.6f ", event_time.etime - first_time.etime);
         for(i = 0; i < current_depth; i++)
             HDfputc('+', out);
-        fprintf(out, "%*s%s(", 2*current_depth, "", func);
+        HDfprintf(out, "%*s%s(", 2*current_depth, "", func);
     } /* end else */
 
     /* Clear array sizes */
@@ -228,33 +226,33 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
          * name is the null pointer then don't print the argument or the
          * following `='.  This is used for return values.
          */
-        argname = va_arg(ap, char *); /*lint !e64 Type mismatch not really occuring */
+        argname = va_arg(ap, char *);
         if(argname) {
-            unsigned n = (unsigned)MAX (0, (int)HDstrlen(argname) - 3); /*lint !e666 Allow expression with side effects */
+            unsigned n = (unsigned)MAX (0, (int)HDstrlen(argname) - 3);
 
             if(!HDstrcmp(argname + n, "_id")) {
                 HDstrncpy(buf, argname, (size_t)MIN((int)sizeof(buf) - 1, n));
                 buf[MIN((int)sizeof(buf) - 1, n)] = '\0';
                 argname = buf;
             } /* end if */
-                fprintf(out, "%s%s=", argno?", ":"", argname);
+                HDfprintf(out, "%s%s=", argno?", ":"", argname);
         } /* end if */
         else
             argname = "";
 
         /* The value */
         if(ptr)
-            vp = va_arg(ap, void *); /*lint !e64 Type mismatch not really occuring */
+            vp = va_arg(ap, void *);
         switch(type[0]) {
             case 'a':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
-                    haddr_t addr = va_arg(ap, haddr_t); /*lint !e732 Loss of sign not really occuring */
+                    haddr_t addr = va_arg(ap, haddr_t);
 
                     HDfprintf(out, "%a", addr);
                 } /* end else */
@@ -263,33 +261,33 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 'b':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                     } /* end if */
                 else {
                     /* Can't pass hbool_t to va_arg() */
                     hbool_t bool_var = (hbool_t)va_arg(ap, int);
                     if(TRUE == bool_var)
-                        fprintf(out, "TRUE");
+                        HDfprintf(out, "TRUE");
                     else if(!bool_var)
-                        fprintf(out, "FALSE");
+                        HDfprintf(out, "FALSE");
                     else
-                        fprintf(out, "TRUE(%u)", (unsigned)bool_var);
+                        HDfprintf(out, "TRUE(%u)", (unsigned)bool_var);
                 }
                 break;
 
             case 'd':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
                     double dbl = va_arg(ap, double);
 
-                    fprintf(out, "%g", dbl);
+                    HDfprintf(out, "%g", dbl);
                 } /* end else */
                 break;
 
@@ -298,36 +296,36 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'a':
                         if(ptr) {
                             if(vp)
-                                fprintf (out, "0x%lx", (unsigned long)vp);
+                                HDfprintf (out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_alloc_time_t alloc_time = (H5D_alloc_time_t)va_arg(ap, int);
 
                             switch(alloc_time) {
                                 case H5D_ALLOC_TIME_ERROR:
-                                    fprintf(out, "H5D_ALLOC_TIME_ERROR");
+                                    HDfprintf(out, "H5D_ALLOC_TIME_ERROR");
                                     break;
 
                                 case H5D_ALLOC_TIME_DEFAULT:
-                                    fprintf(out, "H5D_ALLOC_TIME_DEFAULT");
+                                    HDfprintf(out, "H5D_ALLOC_TIME_DEFAULT");
                                     break;
 
                                 case H5D_ALLOC_TIME_EARLY:
-                                    fprintf(out, "H5D_ALLOC_TIME_EARLY");
+                                    HDfprintf(out, "H5D_ALLOC_TIME_EARLY");
                                     break;
 
                                 case H5D_ALLOC_TIME_LATE:
-                                    fprintf(out, "H5D_ALLOC_TIME_LATE");
+                                    HDfprintf(out, "H5D_ALLOC_TIME_LATE");
                                     break;
 
                                 case H5D_ALLOC_TIME_INCR:
-                                    fprintf(out, "H5D_ALLOC_TIME_INCR");
+                                    HDfprintf(out, "H5D_ALLOC_TIME_INCR");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)alloc_time);
+                                    HDfprintf(out, "%ld", (long)alloc_time);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -336,24 +334,24 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'c':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5FD_mpio_collective_opt_t opt = (H5FD_mpio_collective_opt_t)va_arg(ap, int);
 
                             switch(opt) {
                                 case H5FD_MPIO_COLLECTIVE_IO:
-                                    fprintf(out, "H5FD_MPIO_COLLECTIVE_IO");
+                                   HDfprintf(out, "H5FD_MPIO_COLLECTIVE_IO");
                                     break;
 
                                 case H5FD_MPIO_INDIVIDUAL_IO:
-                                    fprintf(out, "H5FD_MPIO_INDIVIDUAL_IO");
+                                   HDfprintf(out, "H5FD_MPIO_INDIVIDUAL_IO");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)opt);
+                                   HDfprintf(out, "%ld", (long)opt);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -362,32 +360,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'f':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_fill_time_t fill_time = (H5D_fill_time_t)va_arg(ap, int);
 
                             switch(fill_time) {
                                 case H5D_FILL_TIME_ERROR:
-                                    fprintf(out, "H5D_FILL_TIME_ERROR");
+                                   HDfprintf(out, "H5D_FILL_TIME_ERROR");
                                     break;
 
                                 case H5D_FILL_TIME_ALLOC:
-                                    fprintf(out, "H5D_FILL_TIME_ALLOC");
+                                   HDfprintf(out, "H5D_FILL_TIME_ALLOC");
                                     break;
 
                                 case H5D_FILL_TIME_NEVER:
-                                    fprintf(out, "H5D_FILL_TIME_NEVER");
+                                   HDfprintf(out, "H5D_FILL_TIME_NEVER");
                                     break;
 
                                 case H5D_FILL_TIME_IFSET:
-                                    fprintf(out, "H5D_FILL_TIME_IFSET");
+                                   HDfprintf(out, "H5D_FILL_TIME_IFSET");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)fill_time);
+                                   HDfprintf(out, "%ld", (long)fill_time);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -396,32 +394,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'F':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_fill_value_t fill_value = (H5D_fill_value_t)va_arg(ap, int);
 
                             switch(fill_value) {
                                 case H5D_FILL_VALUE_ERROR:
-                                    fprintf(out, "H5D_FILL_VALUE_ERROR");
+                                   HDfprintf(out, "H5D_FILL_VALUE_ERROR");
                                     break;
 
                                 case H5D_FILL_VALUE_UNDEFINED:
-                                    fprintf(out, "H5D_FILL_VALUE_UNDEFINED");
+                                   HDfprintf(out, "H5D_FILL_VALUE_UNDEFINED");
                                     break;
 
                                 case H5D_FILL_VALUE_DEFAULT:
-                                    fprintf(out, "H5D_FILL_VALUE_DEFAULT");
+                                   HDfprintf(out, "H5D_FILL_VALUE_DEFAULT");
                                     break;
 
                                 case H5D_FILL_VALUE_USER_DEFINED:
-                                    fprintf(out, "H5D_FILL_VALUE_USER_DEFINED");
+                                   HDfprintf(out, "H5D_FILL_VALUE_USER_DEFINED");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)fill_value);
+                                   HDfprintf(out, "%ld", (long)fill_value);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -430,28 +428,28 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'h':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5FD_mpio_chunk_opt_t opt = (H5FD_mpio_chunk_opt_t)va_arg(ap, int);
 
                             switch(opt) {
                                 case H5FD_MPIO_CHUNK_DEFAULT:
-                                    fprintf(out, "H5FD_MPIO_CHUNK_DEFAULT");
+                                   HDfprintf(out, "H5FD_MPIO_CHUNK_DEFAULT");
                                     break;
 
                                 case H5FD_MPIO_CHUNK_ONE_IO:
-                                    fprintf(out, "H5FD_MPIO_CHUNK_ONE_IO");
+                                   HDfprintf(out, "H5FD_MPIO_CHUNK_ONE_IO");
                                     break;
 
                                 case H5FD_MPIO_CHUNK_MULTI_IO:
-                                    fprintf(out, "H5FD_MPIO_CHUNK_MULTI_IO");
+                                   HDfprintf(out, "H5FD_MPIO_CHUNK_MULTI_IO");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)opt);
+                                   HDfprintf(out, "%ld", (long)opt);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -460,36 +458,36 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'i':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_mpio_actual_io_mode_t actual_io_mode = (H5D_mpio_actual_io_mode_t)va_arg(ap, int);
 
                             switch(actual_io_mode) {
                                 case H5D_MPIO_NO_COLLECTIVE:
-                                    fprintf(out, "H5D_MPIO_NO_COLLECTIVE");
+                                   HDfprintf(out, "H5D_MPIO_NO_COLLECTIVE");
                                     break;
 
                                 case H5D_MPIO_CHUNK_INDEPENDENT:
-                                    fprintf(out, "H5D_MPIO_CHUNK_INDEPENDENT");
+                                   HDfprintf(out, "H5D_MPIO_CHUNK_INDEPENDENT");
                                     break;
 
                                 case H5D_MPIO_CHUNK_COLLECTIVE:
-                                    fprintf(out, "H5D_MPIO_CHUNK_COLLECTIVE");
+                                   HDfprintf(out, "H5D_MPIO_CHUNK_COLLECTIVE");
                                     break;
 
                                 case H5D_MPIO_CHUNK_MIXED:
-                                    fprintf(out, "H5D_MPIO_CHUNK_MIXED");
+                                   HDfprintf(out, "H5D_MPIO_CHUNK_MIXED");
                                     break;
 
                                 case H5D_MPIO_CONTIGUOUS_COLLECTIVE:
-                                    fprintf(out, "H5D_MPIO_CONTIGUOUS_COLLECTIVE");
+                                   HDfprintf(out, "H5D_MPIO_CONTIGUOUS_COLLECTIVE");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)actual_io_mode);
+                                   HDfprintf(out, "%ld", (long)actual_io_mode);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -498,44 +496,44 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'k':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_chunk_index_t idx = (H5D_chunk_index_t)va_arg(ap, int);
 
                             switch(idx) {
                                 case H5D_CHUNK_IDX_BTREE:
-                                    fprintf(out, "H5D_CHUNK_IDX_BTREE");
+                                   HDfprintf(out, "H5D_CHUNK_IDX_BTREE");
                                     break;
 
                                 case H5D_CHUNK_IDX_NONE:
-                                    fprintf(out, "H5D_CHUNK_IDX_NONE");
+                                   HDfprintf(out, "H5D_CHUNK_IDX_NONE");
                                     break;
 
                                 case H5D_CHUNK_IDX_FARRAY:
-                                    fprintf(out, "H5D_CHUNK_IDX_FARRAY");
+                                   HDfprintf(out, "H5D_CHUNK_IDX_FARRAY");
                                     break;
 
                                 case H5D_CHUNK_IDX_EARRAY:
-                                    fprintf(out, "H5D_CHUNK_IDX_EARRAY");
+                                   HDfprintf(out, "H5D_CHUNK_IDX_EARRAY");
                                     break;
 
                                 case H5D_CHUNK_IDX_BT2:
-                                    fprintf(out, "H5D_CHUNK_IDX_BT2");
+                                   HDfprintf(out, "H5D_CHUNK_IDX_BT2");
                                     break;
 
                                 case H5D_CHUNK_IDX_SINGLE:
-                                    fprintf(out, "H5D_CHUNK_IDX_SINGLE");
+                                   HDfprintf(out, "H5D_CHUNK_IDX_SINGLE");
                                     break;
 
                                 case H5D_CHUNK_IDX_NTYPES:
-                                    fprintf(out, "ERROR: H5D_CHUNK_IDX_NTYPES (invalid value)");
+                                   HDfprintf(out, "ERROR: H5D_CHUNK_IDX_NTYPES (invalid value)");
                                     break;
 
                                 default:
-                                    fprintf(out, "UNKNOWN VALUE: %ld", (long)idx);
+                                   HDfprintf(out, "UNKNOWN VALUE: %ld", (long)idx);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -544,40 +542,40 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'l':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_layout_t layout = (H5D_layout_t)va_arg(ap, int);
 
                             switch(layout) {
                                 case H5D_LAYOUT_ERROR:
-                                    fprintf(out, "H5D_LAYOUT_ERROR");
+                                   HDfprintf(out, "H5D_LAYOUT_ERROR");
                                     break;
 
                                 case H5D_COMPACT:
-                                    fprintf(out, "H5D_COMPACT");
+                                   HDfprintf(out, "H5D_COMPACT");
                                     break;
 
                                 case H5D_CONTIGUOUS:
-                                    fprintf(out, "H5D_CONTIGUOUS");
+                                   HDfprintf(out, "H5D_CONTIGUOUS");
                                     break;
 
                                 case H5D_CHUNKED:
-                                    fprintf(out, "H5D_CHUNKED");
+                                   HDfprintf(out, "H5D_CHUNKED");
                                     break;
 
                                 case H5D_VIRTUAL:
-                                    fprintf(out, "H5D_VIRTUAL");
+                                   HDfprintf(out, "H5D_VIRTUAL");
                                     break;
 
                                 case H5D_NLAYOUTS:
-                                    fprintf(out, "H5D_NLAYOUTS");
+                                   HDfprintf(out, "H5D_NLAYOUTS");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)layout);
+                                   HDfprintf(out, "%ld", (long)layout);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -586,9 +584,9 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'n':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_mpio_no_collective_cause_t nocol_cause_mode = (H5D_mpio_no_collective_cause_t)va_arg(ap, int);
@@ -596,69 +594,65 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
 
                             /* Check for all bit-flags which might be set */
                             if(nocol_cause_mode & H5D_MPIO_COLLECTIVE) {
-                                fprintf(out, "H5D_MPIO_COLLECTIVE");
+                               HDfprintf(out, "H5D_MPIO_COLLECTIVE");
                                 flag_already_displayed = TRUE;
                             } /* end if */
                             if(nocol_cause_mode & H5D_MPIO_SET_INDEPENDENT) {
-                                fprintf(out, "%sH5D_MPIO_SET_INDEPENDENT", flag_already_displayed ? " | " : "");
+                               HDfprintf(out, "%sH5D_MPIO_SET_INDEPENDENT", flag_already_displayed ? " | " : "");
                                 flag_already_displayed = TRUE;
                             } /* end if */
                             if(nocol_cause_mode & H5D_MPIO_DATATYPE_CONVERSION) {
-                                fprintf(out, "%sH5D_MPIO_DATATYPE_CONVERSION", flag_already_displayed ? " | " : "");
+                               HDfprintf(out, "%sH5D_MPIO_DATATYPE_CONVERSION", flag_already_displayed ? " | " : "");
                                 flag_already_displayed = TRUE;
                             } /* end if */
                             if(nocol_cause_mode & H5D_MPIO_DATA_TRANSFORMS) {
-                                fprintf(out, "%sH5D_MPIO_DATA_TRANSFORMS", flag_already_displayed ? " | " : "");
+                               HDfprintf(out, "%sH5D_MPIO_DATA_TRANSFORMS", flag_already_displayed ? " | " : "");
                                 flag_already_displayed = TRUE;
                             } /* end if */
                             if(nocol_cause_mode & H5D_MPIO_MPI_OPT_TYPES_ENV_VAR_DISABLED) {
-                                fprintf(out, "%sH5D_MPIO_MPI_OPT_TYPES_ENV_VAR_DISABLED", flag_already_displayed ? " | " : "");
+                               HDfprintf(out, "%sH5D_MPIO_MPI_OPT_TYPES_ENV_VAR_DISABLED", flag_already_displayed ? " | " : "");
                                 flag_already_displayed = TRUE;
                             } /* end if */
                             if(nocol_cause_mode & H5D_MPIO_NOT_SIMPLE_OR_SCALAR_DATASPACES) {
-                                fprintf(out, "%sH5D_MPIO_NOT_SIMPLE_OR_SCALAR_DATASPACES", flag_already_displayed ? " | " : "");
+                               HDfprintf(out, "%sH5D_MPIO_NOT_SIMPLE_OR_SCALAR_DATASPACES", flag_already_displayed ? " | " : "");
                                 flag_already_displayed = TRUE;
                             } /* end if */
                             if(nocol_cause_mode & H5D_MPIO_NOT_CONTIGUOUS_OR_CHUNKED_DATASET) {
-                                fprintf(out, "%sH5D_MPIO_NOT_CONTIGUOUS_OR_CHUNKED_DATASET", flag_already_displayed ? " | " : "");
-                                flag_already_displayed = TRUE;
-                            } /* end if */
-                            if(nocol_cause_mode & H5D_MPIO_FILTERS) {
-                                fprintf(out, "%sH5D_MPIO_FILTERS", flag_already_displayed ? " | " : "");
+                               HDfprintf(out, "%sH5D_MPIO_NOT_CONTIGUOUS_OR_CHUNKED_DATASET", flag_already_displayed ? " | " : "");
                                 flag_already_displayed = TRUE;
                             } /* end if */
 
                             /* Display '<none>' if there's no flags set */
                             if(!flag_already_displayed)
-                                fprintf(out, "<none>");
+                               HDfprintf(out, "<none>");
                         } /* end else */
                         break;
 
                     case 'o':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_mpio_actual_chunk_opt_mode_t chunk_opt_mode = (H5D_mpio_actual_chunk_opt_mode_t)va_arg(ap, int);
 
                             switch(chunk_opt_mode) {
                                 case H5D_MPIO_NO_CHUNK_OPTIMIZATION:
-                                    fprintf(out, "H5D_MPIO_NO_CHUNK_OPTIMIZATION");
+                                   HDfprintf(out, "H5D_MPIO_NO_CHUNK_OPTIMIZATION");
                                     break;
 
                                 case H5D_MPIO_LINK_CHUNK:
-                                    fprintf(out, "H5D_MPIO_LINK_CHUNK");
+                                   HDfprintf(out, "H5D_MPIO_LINK_CHUNK");
                                     break;
 
                                 case H5D_MPIO_MULTI_CHUNK:
-                                    fprintf(out, "H5D_MPIO_MULTI_CHUNK");
+                                   HDfprintf(out, "H5D_MPIO_MULTI_CHUNK");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)chunk_opt_mode);
+                                   HDfprintf(out, "%ld", (long)chunk_opt_mode);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -667,32 +661,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 's':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_space_status_t space_status = (H5D_space_status_t)va_arg(ap, int);
 
                             switch(space_status) {
                                 case H5D_SPACE_STATUS_NOT_ALLOCATED:
-                                    fprintf(out, "H5D_SPACE_STATUS_NOT_ALLOCATED");
+                                   HDfprintf(out, "H5D_SPACE_STATUS_NOT_ALLOCATED");
                                     break;
 
                                 case H5D_SPACE_STATUS_PART_ALLOCATED:
-                                    fprintf(out, "H5D_SPACE_STATUS_PART_ALLOCATED");
+                                   HDfprintf(out, "H5D_SPACE_STATUS_PART_ALLOCATED");
                                     break;
 
                                 case H5D_SPACE_STATUS_ALLOCATED:
-                                    fprintf(out, "H5D_SPACE_STATUS_ALLOCATED");
+                                   HDfprintf(out, "H5D_SPACE_STATUS_ALLOCATED");
                                     break;
 
                                 case H5D_SPACE_STATUS_ERROR:
-                                    fprintf(out, "H5D_SPACE_STATUS_ERROR");
+                                   HDfprintf(out, "H5D_SPACE_STATUS_ERROR");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)space_status);
+                                   HDfprintf(out, "%ld", (long)space_status);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -701,24 +695,24 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5FD_mpio_xfer_t transfer = (H5FD_mpio_xfer_t)va_arg(ap, int);
 
                             switch(transfer) {
                                 case H5FD_MPIO_INDEPENDENT:
-                                    fprintf(out, "H5FD_MPIO_INDEPENDENT");
+                                   HDfprintf(out, "H5FD_MPIO_INDEPENDENT");
                                     break;
 
                                 case H5FD_MPIO_COLLECTIVE:
-                                    fprintf(out, "H5FD_MPIO_COLLECTIVE");
+                                   HDfprintf(out, "H5FD_MPIO_COLLECTIVE");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)transfer);
+                                   HDfprintf(out, "%ld", (long)transfer);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -727,35 +721,35 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'v':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5D_vds_view_t view = (H5D_vds_view_t)va_arg(ap, int);
 
                             switch(view) {
                                 case H5D_VDS_ERROR:
-                                    fprintf(out, "H5D_VDS_ERROR");
+                                   HDfprintf(out, "H5D_VDS_ERROR");
                                     break;
 
                                 case H5D_VDS_FIRST_MISSING:
-                                    fprintf(out, "H5D_VDS_FIRST_MISSING");
+                                   HDfprintf(out, "H5D_VDS_FIRST_MISSING");
                                     break;
 
                                 case H5D_VDS_LAST_AVAILABLE:
-                                    fprintf(out, "H5D_VDS_LAST_AVAILABLE");
+                                   HDfprintf(out, "H5D_VDS_LAST_AVAILABLE");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)view);
+                                   HDfprintf(out, "%ld", (long)view);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf (out, "BADTYPE(D%c)", type[1]);
+                       HDfprintf (out, "BADTYPE(D%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -763,17 +757,17 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 'e':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                       HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                       HDfprintf(out, "NULL");
                 } /* end if */
                 else {
                     herr_t status = va_arg(ap, herr_t);
 
                     if(status >= 0)
-                        fprintf(out, "SUCCEED");
+                       HDfprintf(out, "SUCCEED");
                     else 
-                        fprintf(out, "FAIL");
+                       HDfprintf(out, "FAIL");
                 } /* end else */
                 break;
 
@@ -782,24 +776,24 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'd':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5E_direction_t direction = (H5E_direction_t)va_arg(ap, int);
 
                             switch(direction) {
                                 case H5E_WALK_UPWARD:
-                                    fprintf(out, "H5E_WALK_UPWARD");
+                                   HDfprintf(out, "H5E_WALK_UPWARD");
                                     break;
 
                                 case H5E_WALK_DOWNWARD:
-                                    fprintf(out, "H5E_WALK_DOWNWARD");
+                                   HDfprintf(out, "H5E_WALK_DOWNWARD");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)direction);
+                                   HDfprintf(out, "%ld", (long)direction);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -808,45 +802,45 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'e':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
-                            H5E_error2_t *error = va_arg(ap, H5E_error2_t *); /*lint !e64 Type mismatch not really occuring */
+                            H5E_error2_t *error = va_arg(ap, H5E_error2_t *);
 
-                            fprintf(out, "0x%lx", (unsigned long)error);
+                           HDfprintf(out, "0x%lx", (unsigned long)error);
                         } /* end else */
                         break;
 
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5E_type_t etype = (H5E_type_t)va_arg(ap, int);
 
                             switch(etype) {
                                 case H5E_MAJOR:
-                                    fprintf(out, "H5E_MAJOR");
+                                   HDfprintf(out, "H5E_MAJOR");
                                     break;
 
                                 case H5E_MINOR:
-                                    fprintf(out, "H5E_MINOR");
+                                   HDfprintf(out, "H5E_MINOR");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)etype);
+                                   HDfprintf(out, "%ld", (long)etype);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf(out, "BADTYPE(E%c)", type[1]);
+                       HDfprintf(out, "BADTYPE(E%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -856,32 +850,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'd':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5F_close_degree_t degree = (H5F_close_degree_t)va_arg(ap, int);
 
                             switch(degree) {
                                 case H5F_CLOSE_DEFAULT:
-                                    fprintf(out, "H5F_CLOSE_DEFAULT");
+                                   HDfprintf(out, "H5F_CLOSE_DEFAULT");
                                     break;
 
                                 case H5F_CLOSE_WEAK:
-                                    fprintf(out, "H5F_CLOSE_WEAK");
+                                   HDfprintf(out, "H5F_CLOSE_WEAK");
                                     break;
 
                                 case H5F_CLOSE_SEMI:
-                                    fprintf(out, "H5F_CLOSE_SEMI");
+                                   HDfprintf(out, "H5F_CLOSE_SEMI");
                                     break;
 
                                 case H5F_CLOSE_STRONG:
-                                    fprintf(out, "H5F_CLOSE_STRONG");
+                                   HDfprintf(out, "H5F_CLOSE_STRONG");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)degree);
+                                   HDfprintf(out, "%ld", (long)degree);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -890,33 +884,33 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'f':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5F_fspace_strategy_t fs_strategy = (H5F_fspace_strategy_t)va_arg(ap, int);
 
                             switch(fs_strategy) {
                                 case H5F_FSPACE_STRATEGY_FSM_AGGR:
-                                    fprintf(out, "H5F_FSPACE_STRATEGY_FSM_AGGR");
+                                   HDfprintf(out, "H5F_FSPACE_STRATEGY_FSM_AGGR");
                                     break;
 
                                 case H5F_FSPACE_STRATEGY_PAGE:
-                                    fprintf(out, "H5F_FSPACE_STRATEGY_PAGE");
+                                   HDfprintf(out, "H5F_FSPACE_STRATEGY_PAGE");
                                     break;
 
                                 case H5F_FSPACE_STRATEGY_AGGR:
-                                    fprintf(out, "H5F_FSPACE_STRATEGY_AGGR");
+                                   HDfprintf(out, "H5F_FSPACE_STRATEGY_AGGR");
                                     break;
 
                                 case H5F_FSPACE_STRATEGY_NONE:
-                                    fprintf(out, "H5F_FSPACE_STRATEGY_NONE");
+                                   HDfprintf(out, "H5F_FSPACE_STRATEGY_NONE");
                                     break;
 
                                 case H5F_FSPACE_STRATEGY_NTYPES:
                                 default:
-                                    fprintf(out, "%ld", (long)fs_strategy);
+                                   HDfprintf(out, "%ld", (long)fs_strategy);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -925,49 +919,49 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'm':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5F_mem_t mem_type = (H5F_mem_t)va_arg(ap, int);
 
                             switch(mem_type) {
                                 case H5FD_MEM_NOLIST:
-                                    fprintf(out, "H5FD_MEM_NOLIST");
+                                   HDfprintf(out, "H5FD_MEM_NOLIST");
                                     break;
 
                                 case H5FD_MEM_DEFAULT:
-                                    fprintf(out, "H5FD_MEM_DEFAULT");
+                                   HDfprintf(out, "H5FD_MEM_DEFAULT");
                                     break;
 
                                 case H5FD_MEM_SUPER:
-                                    fprintf(out, "H5FD_MEM_SUPER");
+                                   HDfprintf(out, "H5FD_MEM_SUPER");
                                     break;
 
                                 case H5FD_MEM_BTREE:
-                                    fprintf(out, "H5FD_MEM_BTREE");
+                                   HDfprintf(out, "H5FD_MEM_BTREE");
                                     break;
 
                                 case H5FD_MEM_DRAW:
-                                    fprintf(out, "H5FD_MEM_DRAW");
+                                   HDfprintf(out, "H5FD_MEM_DRAW");
                                     break;
 
                                 case H5FD_MEM_GHEAP:
-                                    fprintf(out, "H5FD_MEM_GHEAP");
+                                   HDfprintf(out, "H5FD_MEM_GHEAP");
                                     break;
 
                                 case H5FD_MEM_LHEAP:
-                                    fprintf(out, "H5FD_MEM_LHEAP");
+                                   HDfprintf(out, "H5FD_MEM_LHEAP");
                                     break;
 
                                 case H5FD_MEM_OHDR:
-                                    fprintf(out, "H5FD_MEM_OHDR");
+                                   HDfprintf(out, "H5FD_MEM_OHDR");
                                     break;
 
                                 case H5FD_MEM_NTYPES:
                                 default:
-                                    fprintf(out, "%ld", (long)mem_type);
+                                   HDfprintf(out, "%ld", (long)mem_type);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -976,24 +970,24 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 's':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5F_scope_t scope = (H5F_scope_t)va_arg(ap, int);
 
                             switch(scope) {
                                 case H5F_SCOPE_LOCAL:
-                                    fprintf(out, "H5F_SCOPE_LOCAL");
+                                   HDfprintf(out, "H5F_SCOPE_LOCAL");
                                     break;
 
                                 case H5F_SCOPE_GLOBAL:
-                                    fprintf(out, "H5F_SCOPE_GLOBAL");
+                                   HDfprintf(out, "H5F_SCOPE_GLOBAL");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)scope);
+                                   HDfprintf(out, "%ld", (long)scope);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1002,40 +996,47 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         break;
 
                     case 'v':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                               HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                               HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5F_libver_t libver_vers = (H5F_libver_t)va_arg(ap, int);
 
                             switch(libver_vers) {
                                 case H5F_LIBVER_EARLIEST:
-                                    fprintf(out, "H5F_LIBVER_EARLIEST");
+                                    HDfprintf(out, "H5F_LIBVER_EARLIEST");
+                                    break;
+
+                                case H5F_LIBVER_V18:
+                                    HDfprintf(out, "H5F_LIBVER_V18");
                                     break;
 
-                                case H5F_LIBVER_LATEST:
-                                    fprintf(out, "H5F_LIBVER_LATEST");
+                                case H5F_LIBVER_V110:
+                                    HDcompile_assert(H5F_LIBVER_LATEST == H5F_LIBVER_V110);
+                                    HDfprintf(out, "H5F_LIBVER_LATEST");
                                     break;
 
+                                case H5F_LIBVER_ERROR:
+                                case H5F_LIBVER_NBOUNDS:
                                 default:
-                                    fprintf(out, "%ld", (long)libver_vers);
+                                    HDfprintf(out, "%ld", (long)libver_vers);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf(out, "BADTYPE(F%c)", type[1]);
+                        HDfprintf(out, "BADTYPE(F%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -1046,46 +1047,46 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'o':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5G_obj_t obj_type = (H5G_obj_t)va_arg(ap, int);
 
                             switch(obj_type) {
                                 case H5G_UNKNOWN:
-                                    fprintf(out, "H5G_UNKNOWN");
+                                    HDfprintf(out, "H5G_UNKNOWN");
                                     break;
 
                                 case H5G_GROUP:
-                                    fprintf(out, "H5G_GROUP");
+                                    HDfprintf(out, "H5G_GROUP");
                                     break;
 
                                 case H5G_DATASET:
-                                    fprintf(out, "H5G_DATASET");
+                                    HDfprintf(out, "H5G_DATASET");
                                     break;
 
                                 case H5G_TYPE:
-                                    fprintf(out, "H5G_TYPE");
+                                    HDfprintf(out, "H5G_TYPE");
                                     break;
 
                                 case H5G_LINK:
-                                    fprintf(out, "H5G_LINK");
+                                    HDfprintf(out, "H5G_LINK");
                                     break;
 
                                 case H5G_UDLINK:
-                                    fprintf(out, "H5G_UDLINK");
+                                    HDfprintf(out, "H5G_UDLINK");
                                     break;
 
                                 case H5G_RESERVED_5:
                                 case H5G_RESERVED_6:
                                 case H5G_RESERVED_7:
-                                    fprintf(out, "H5G_RESERVED(%ld)", (long)obj_type);
+                                    HDfprintf(out, "H5G_RESERVED(%ld)", (long)obj_type);
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)obj_type);
+                                    HDfprintf(out, "%ld", (long)obj_type);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1094,20 +1095,20 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 's':
                         if(ptr) {
                             if(vp)
-                                fprintf (out, "0x%lx", (unsigned long)vp);
+                                HDfprintf (out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
-                            H5G_stat_t *statbuf = va_arg(ap, H5G_stat_t*); /*lint !e64 Type mismatch not really occuring */
+                            H5G_stat_t *statbuf = va_arg(ap, H5G_stat_t*);
 
-                            fprintf(out, "0x%lx", (unsigned long)statbuf);
+                            HDfprintf(out, "0x%lx", (unsigned long)statbuf);
                         }
                         break;
 #endif /* H5_NO_DEPRECATED_SYMBOLS */
 
                     default:
-                        fprintf(out, "BADTYPE(G%c)", type[1]);
+                        HDfprintf(out, "BADTYPE(G%c)", type[1]);
                         goto error;
                 }
                 break;
@@ -1115,25 +1116,25 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 'h':
                 if(ptr) {
                     if(vp) {
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                         if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                             hsize_t *p = (hsize_t *)vp;
 
-                            fprintf(out, " {");
+                            HDfprintf(out, " {");
                             for(i = 0; i < asize[asize_idx]; i++) {
                                 if(H5S_UNLIMITED == p[i])
                                     HDfprintf(out, "%sH5S_UNLIMITED", (i ? ", " : ""));
                                 else
                                     HDfprintf(out, "%s%Hu", (i ? ", " : ""), p[i]);
                             } /* end for */
-                            fprintf(out, "}");
+                            HDfprintf(out, "}");
                         } /* end if */
                     } /* end if */
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
-                    hsize_t hsize = va_arg(ap, hsize_t); /*lint !e732 Loss of sign not really occuring */
+                    hsize_t hsize = va_arg(ap, hsize_t);
 
                     if(H5S_UNLIMITED == hsize)
                         HDfprintf(out, "H5S_UNLIMITED");
@@ -1149,18 +1150,18 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 's':
                         if(ptr) {
                             if(vp) {
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                                 if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                                     hssize_t *p = (hssize_t *)vp;
 
-                                    fprintf(out, " {");
+                                    HDfprintf(out, " {");
                                     for(i = 0; i < asize[asize_idx]; i++)
                                         HDfprintf(out, "%s%Hd", (i ? ", " : ""), p[i]);
-                                    fprintf(out, "}");
+                                    HDfprintf(out, "}");
                                 } /* end if */
                             } /* end if */
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             hssize_t hssize = va_arg(ap, hssize_t);
@@ -1171,7 +1172,7 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                         break;
 
                     default:
-                        fprintf (out, "BADTYPE(H%c)", type[1]);
+                        HDfprintf (out, "BADTYPE(H%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -1179,130 +1180,130 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 'i':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
                     hid_t obj = va_arg(ap, hid_t);
 
                     if(H5P_DEFAULT == obj)
-                        fprintf(out, "H5P_DEFAULT");
+                        HDfprintf(out, "H5P_DEFAULT");
                     else if(obj < 0)
-                        fprintf(out, "FAIL");
+                        HDfprintf(out, "FAIL");
                     else {
                         switch(H5I_TYPE(obj)) { /* Use internal H5I macro instead of function call */
                             case H5I_UNINIT:
-                                fprintf(out, "%ld (uninit - error)", (long)obj);
+                                HDfprintf(out, "%ld (uninit - error)", (long)obj);
                                 break;
 
                             case H5I_BADID:
-                                fprintf(out, "%ld (error)", (long)obj);
+                                HDfprintf(out, "%ld (error)", (long)obj);
                                 break;
 
                             case H5I_FILE:
-                                fprintf(out, "%ld (file)", (long)obj);
+                                HDfprintf(out, "%ld (file)", (long)obj);
                                 break;
 
                             case H5I_GROUP:
-                                fprintf(out, "%ld (group)", (long)obj);
+                                HDfprintf(out, "%ld (group)", (long)obj);
                                 break;
 
                             case H5I_DATATYPE:
                                 if(obj == H5T_NATIVE_SCHAR_g)
-                                    fprintf(out, "H5T_NATIVE_SCHAR");
+                                    HDfprintf(out, "H5T_NATIVE_SCHAR");
                                 else if(obj == H5T_NATIVE_UCHAR_g)
-                                    fprintf(out, "H5T_NATIVE_UCHAR");
+                                    HDfprintf(out, "H5T_NATIVE_UCHAR");
                                 else if(obj == H5T_NATIVE_SHORT_g)
-                                    fprintf(out, "H5T_NATIVE_SHORT");
+                                    HDfprintf(out, "H5T_NATIVE_SHORT");
                                 else if(obj == H5T_NATIVE_USHORT_g)
-                                    fprintf(out, "H5T_NATIVE_USHORT");
+                                    HDfprintf(out, "H5T_NATIVE_USHORT");
                                 else if(obj == H5T_NATIVE_INT_g)
-                                    fprintf(out, "H5T_NATIVE_INT");
+                                    HDfprintf(out, "H5T_NATIVE_INT");
                                 else if(obj == H5T_NATIVE_UINT_g)
-                                    fprintf(out, "H5T_NATIVE_UINT");
+                                    HDfprintf(out, "H5T_NATIVE_UINT");
                                 else if(obj == H5T_NATIVE_LONG_g)
-                                    fprintf(out, "H5T_NATIVE_LONG");
+                                    HDfprintf(out, "H5T_NATIVE_LONG");
                                 else if(obj == H5T_NATIVE_ULONG_g)
-                                    fprintf(out, "H5T_NATIVE_ULONG");
+                                    HDfprintf(out, "H5T_NATIVE_ULONG");
                                 else if(obj == H5T_NATIVE_LLONG_g)
-                                    fprintf(out, "H5T_NATIVE_LLONG");
+                                    HDfprintf(out, "H5T_NATIVE_LLONG");
                                 else if(obj == H5T_NATIVE_ULLONG_g)
-                                    fprintf(out, "H5T_NATIVE_ULLONG");
+                                    HDfprintf(out, "H5T_NATIVE_ULLONG");
                                 else if(obj == H5T_NATIVE_FLOAT_g)
-                                    fprintf(out, "H5T_NATIVE_FLOAT");
+                                    HDfprintf(out, "H5T_NATIVE_FLOAT");
                                 else if(obj == H5T_NATIVE_DOUBLE_g)
-                                    fprintf(out, "H5T_NATIVE_DOUBLE");
+                                    HDfprintf(out, "H5T_NATIVE_DOUBLE");
 #if H5_SIZEOF_LONG_DOUBLE !=0
                                 else if(obj == H5T_NATIVE_LDOUBLE_g)
-                                    fprintf(out, "H5T_NATIVE_LDOUBLE");
+                                    HDfprintf(out, "H5T_NATIVE_LDOUBLE");
 #endif
                                 else if(obj == H5T_IEEE_F32BE_g)
-                                    fprintf(out, "H5T_IEEE_F32BE");
+                                    HDfprintf(out, "H5T_IEEE_F32BE");
                                 else if(obj == H5T_IEEE_F32LE_g)
-                                    fprintf(out, "H5T_IEEE_F32LE");
+                                    HDfprintf(out, "H5T_IEEE_F32LE");
                                 else if(obj == H5T_IEEE_F64BE_g)
-                                    fprintf(out, "H5T_IEEE_F64BE");
+                                    HDfprintf(out, "H5T_IEEE_F64BE");
                                 else if(obj == H5T_IEEE_F64LE_g)
-                                    fprintf(out, "H5T_IEEE_F64LE");
+                                    HDfprintf(out, "H5T_IEEE_F64LE");
                                 else if(obj == H5T_STD_I8BE_g)
-                                    fprintf(out, "H5T_STD_I8BE");
+                                    HDfprintf(out, "H5T_STD_I8BE");
                                 else if(obj == H5T_STD_I8LE_g)
-                                    fprintf(out, "H5T_STD_I8LE");
+                                    HDfprintf(out, "H5T_STD_I8LE");
                                 else if(obj == H5T_STD_I16BE_g)
-                                    fprintf(out, "H5T_STD_I16BE");
+                                    HDfprintf(out, "H5T_STD_I16BE");
                                 else if(obj == H5T_STD_I16LE_g)
-                                    fprintf(out, "H5T_STD_I16LE");
+                                    HDfprintf(out, "H5T_STD_I16LE");
                                 else if(obj == H5T_STD_I32BE_g)
-                                    fprintf(out, "H5T_STD_I32BE");
+                                    HDfprintf(out, "H5T_STD_I32BE");
                                 else if(obj == H5T_STD_I32LE_g)
-                                    fprintf(out, "H5T_STD_I32LE");
+                                    HDfprintf(out, "H5T_STD_I32LE");
                                 else if(obj == H5T_STD_I64BE_g)
-                                    fprintf(out, "H5T_STD_I64BE");
+                                    HDfprintf(out, "H5T_STD_I64BE");
                                 else if(obj == H5T_STD_I64LE_g)
-                                    fprintf(out, "H5T_STD_I64LE");
+                                    HDfprintf(out, "H5T_STD_I64LE");
                                 else if(obj == H5T_STD_U8BE_g)
-                                    fprintf(out, "H5T_STD_U8BE");
+                                    HDfprintf(out, "H5T_STD_U8BE");
                                 else if(obj == H5T_STD_U8LE_g)
-                                    fprintf(out, "H5T_STD_U8LE");
+                                    HDfprintf(out, "H5T_STD_U8LE");
                                 else if(obj == H5T_STD_U16BE_g)
-                                    fprintf(out, "H5T_STD_U16BE");
+                                    HDfprintf(out, "H5T_STD_U16BE");
                                 else if(obj == H5T_STD_U16LE_g)
-                                    fprintf(out, "H5T_STD_U16LE");
+                                    HDfprintf(out, "H5T_STD_U16LE");
                                 else if(obj == H5T_STD_U32BE_g)
-                                    fprintf(out, "H5T_STD_U32BE");
+                                    HDfprintf(out, "H5T_STD_U32BE");
                                 else if(obj == H5T_STD_U32LE_g)
-                                    fprintf(out, "H5T_STD_U32LE");
+                                    HDfprintf(out, "H5T_STD_U32LE");
                                 else if(obj == H5T_STD_U64BE_g)
-                                    fprintf(out, "H5T_STD_U64BE");
+                                    HDfprintf(out, "H5T_STD_U64BE");
                                 else if(obj == H5T_STD_U64LE_g)
-                                    fprintf(out, "H5T_STD_U64LE");
+                                    HDfprintf(out, "H5T_STD_U64LE");
                                 else if(obj == H5T_STD_B8BE_g)
-                                    fprintf(out, "H5T_STD_B8BE");
+                                    HDfprintf(out, "H5T_STD_B8BE");
                                 else if(obj == H5T_STD_B8LE_g)
-                                    fprintf(out, "H5T_STD_B8LE");
+                                    HDfprintf(out, "H5T_STD_B8LE");
                                 else if(obj == H5T_STD_B16BE_g)
-                                    fprintf(out, "H5T_STD_B16BE");
+                                    HDfprintf(out, "H5T_STD_B16BE");
                                 else if(obj == H5T_STD_B16LE_g)
-                                    fprintf(out, "H5T_STD_B16LE");
+                                    HDfprintf(out, "H5T_STD_B16LE");
                                 else if(obj == H5T_STD_B32BE_g)
-                                    fprintf(out, "H5T_STD_B32BE");
+                                    HDfprintf(out, "H5T_STD_B32BE");
                                 else if(obj == H5T_STD_B32LE_g)
-                                    fprintf(out, "H5T_STD_B32LE");
+                                    HDfprintf(out, "H5T_STD_B32LE");
                                 else if(obj == H5T_STD_B64BE_g)
-                                    fprintf(out, "H5T_STD_B64BE");
+                                    HDfprintf(out, "H5T_STD_B64BE");
                                 else if(obj == H5T_STD_B64LE_g)
-                                    fprintf(out, "H5T_STD_B64LE");
+                                    HDfprintf(out, "H5T_STD_B64LE");
                                 else if(obj == H5T_C_S1_g)
-                                    fprintf(out, "H5T_C_S1");
+                                    HDfprintf(out, "H5T_C_S1");
                                 else if(obj == H5T_FORTRAN_S1_g)
-                                    fprintf(out, "H5T_FORTRAN_S1");
+                                    HDfprintf(out, "H5T_FORTRAN_S1");
                                 else
-                                    fprintf(out, "%ld (dtype)", (long)obj);
+                                    HDfprintf(out, "%ld (dtype)", (long)obj);
                                 break;
 
                             case H5I_DATASPACE:
-                                fprintf(out, "%ld (dspace)", (long)obj);
+                                HDfprintf(out, "%ld (dspace)", (long)obj);
                                 /* Save the rank of simple dataspaces for arrays */
                                 /* This may generate recursive call to the library... -QAK */
                                 {
@@ -1315,47 +1316,47 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                                 break;
 
                             case H5I_DATASET:
-                                fprintf(out, "%ld (dset)", (long)obj);
+                                HDfprintf(out, "%ld (dset)", (long)obj);
                                 break;
 
                             case H5I_ATTR:
-                                fprintf(out, "%ld (attr)", (long)obj);
+                                HDfprintf(out, "%ld (attr)", (long)obj);
                                 break;
 
                             case H5I_REFERENCE:
-                                fprintf(out, "%ld (reference)", (long)obj);
+                                HDfprintf(out, "%ld (reference)", (long)obj);
                                 break;
 
                             case H5I_VFL:
-                                fprintf(out, "%ld (file driver)", (long)obj);
+                                HDfprintf(out, "%ld (file driver)", (long)obj);
                                 break;
 
                             case H5I_GENPROP_CLS:
-                                fprintf(out, "%ld (genprop class)", (long)obj);
+                                HDfprintf(out, "%ld (genprop class)", (long)obj);
                                 break;
 
                             case H5I_GENPROP_LST:
-                                fprintf(out, "%ld (genprop list)", (long)obj);
+                                HDfprintf(out, "%ld (genprop list)", (long)obj);
                                 break;
 
                             case H5I_ERROR_CLASS:
-                                fprintf(out, "%ld (err class)", (long)obj);
+                                HDfprintf(out, "%ld (err class)", (long)obj);
                                 break;
 
                             case H5I_ERROR_MSG:
-                                fprintf(out, "%ld (err msg)", (long)obj);
+                                HDfprintf(out, "%ld (err msg)", (long)obj);
                                 break;
 
                             case H5I_ERROR_STACK:
-                                fprintf(out, "%ld (err stack)", (long)obj);
+                                HDfprintf(out, "%ld (err stack)", (long)obj);
                                 break;
 
                             case H5I_NTYPES:
-                                fprintf (out, "%ld (ntypes - error)", (long)obj);
+                                HDfprintf (out, "%ld (ntypes - error)", (long)obj);
                                 break;
 
                             default:
-                                fprintf(out, "%ld (unknown class)", (long)obj);
+                                HDfprintf(out, "%ld (unknown class)", (long)obj);
                                 break;
                         } /* end switch */
                     } /* end else */
@@ -1367,32 +1368,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'i':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5_index_t idx_type = (H5_index_t)va_arg(ap, int);
 
                             switch(idx_type) {
                                 case H5_INDEX_UNKNOWN:
-                                    fprintf(out, "H5_INDEX_UNKNOWN");
+                                    HDfprintf(out, "H5_INDEX_UNKNOWN");
                                     break;
 
                                 case H5_INDEX_NAME:
-                                    fprintf(out, "H5_INDEX_NAME");
+                                    HDfprintf(out, "H5_INDEX_NAME");
                                     break;
 
                                 case H5_INDEX_CRT_ORDER:
-                                    fprintf(out, "H5_INDEX_CRT_ORDER");
+                                    HDfprintf(out, "H5_INDEX_CRT_ORDER");
                                     break;
 
                                 case H5_INDEX_N:
-                                    fprintf(out, "H5_INDEX_N");
+                                    HDfprintf(out, "H5_INDEX_N");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)idx_type);
+                                    HDfprintf(out, "%ld", (long)idx_type);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1401,36 +1402,36 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'o':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5_iter_order_t order = (H5_iter_order_t)va_arg(ap, int);
 
                             switch(order) {
                                 case H5_ITER_UNKNOWN:
-                                    fprintf(out, "H5_ITER_UNKNOWN");
+                                    HDfprintf(out, "H5_ITER_UNKNOWN");
                                     break;
 
                                 case H5_ITER_INC:
-                                    fprintf(out, "H5_ITER_INC");
+                                    HDfprintf(out, "H5_ITER_INC");
                                     break;
 
                                 case H5_ITER_DEC:
-                                    fprintf(out, "H5_ITER_DEC");
+                                    HDfprintf(out, "H5_ITER_DEC");
                                     break;
 
                                 case H5_ITER_NATIVE:
-                                    fprintf(out, "H5_ITER_NATIVE");
+                                    HDfprintf(out, "H5_ITER_NATIVE");
                                     break;
 
                                 case H5_ITER_N:
-                                    fprintf(out, "H5_ITER_N");
+                                    HDfprintf(out, "H5_ITER_N");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)order);
+                                    HDfprintf(out, "%ld", (long)order);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1439,23 +1440,23 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 's':
                         if(ptr) {
                             if(vp) {
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                                 if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                                     int *p = (int*)vp;
 
-                                    fprintf(out, " {");
+                                    HDfprintf(out, " {");
                                     for(i = 0; i < asize[asize_idx]; i++)
-                                        fprintf(out, "%s%d", (i ? ", " : ""), p[i]);
-                                    fprintf(out, "}");
+                                        HDfprintf(out, "%s%d", (i ? ", " : ""), p[i]);
+                                    HDfprintf(out, "}");
                                 } /* end if */
                             } /* end if */
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             int is = va_arg(ap, int);
 
-                            fprintf (out, "%d", is);
+                            HDfprintf (out, "%d", is);
                             asize[argno] = is;
                         } /* end else */
                         break;
@@ -1463,80 +1464,80 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5I_type_t id_type = (H5I_type_t)va_arg(ap, int);
 
                             switch (id_type) {
                                 case H5I_UNINIT:
-                                    fprintf(out, "H5I_UNINIT");
+                                    HDfprintf(out, "H5I_UNINIT");
                                     break;
 
                                 case H5I_BADID:
-                                    fprintf(out, "H5I_BADID");
+                                    HDfprintf(out, "H5I_BADID");
                                     break;
 
                                 case H5I_FILE:
-                                    fprintf(out, "H5I_FILE");
+                                    HDfprintf(out, "H5I_FILE");
                                     break;
 
                                 case H5I_GROUP:
-                                    fprintf(out, "H5I_GROUP");
+                                    HDfprintf(out, "H5I_GROUP");
                                     break;
 
                                 case H5I_DATATYPE:
-                                    fprintf(out, "H5I_DATATYPE");
+                                    HDfprintf(out, "H5I_DATATYPE");
                                     break;
 
                                 case H5I_DATASPACE:
-                                    fprintf(out, "H5I_DATASPACE");
+                                    HDfprintf(out, "H5I_DATASPACE");
                                     break;
 
                                 case H5I_DATASET:
-                                    fprintf(out, "H5I_DATASET");
+                                    HDfprintf(out, "H5I_DATASET");
                                     break;
 
                                 case H5I_ATTR:
-                                    fprintf(out, "H5I_ATTR");
+                                    HDfprintf(out, "H5I_ATTR");
                                     break;
 
                                 case H5I_REFERENCE:
-                                    fprintf(out, "H5I_REFERENCE");
+                                    HDfprintf(out, "H5I_REFERENCE");
                                     break;
 
                                 case H5I_VFL:
-                                    fprintf(out, "H5I_VFL");
+                                    HDfprintf(out, "H5I_VFL");
                                     break;
 
                                 case H5I_GENPROP_CLS:
-                                    fprintf(out, "H5I_GENPROP_CLS");
+                                    HDfprintf(out, "H5I_GENPROP_CLS");
                                     break;
 
                                 case H5I_GENPROP_LST:
-                                    fprintf(out, "H5I_GENPROP_LST");
+                                    HDfprintf(out, "H5I_GENPROP_LST");
                                     break;
 
                                 case H5I_ERROR_CLASS:
-                                    fprintf(out, "H5I_ERROR_CLASS");
+                                    HDfprintf(out, "H5I_ERROR_CLASS");
                                     break;
 
                                 case H5I_ERROR_MSG:
-                                    fprintf(out, "H5I_ERROR_MSG");
+                                    HDfprintf(out, "H5I_ERROR_MSG");
                                     break;
 
                                 case H5I_ERROR_STACK:
-                                    fprintf(out, "H5I_ERROR_STACK");
+                                    HDfprintf(out, "H5I_ERROR_STACK");
                                     break;
 
                                 case H5I_NTYPES:
-                                    fprintf(out, "H5I_NTYPES");
+                                    HDfprintf(out, "H5I_NTYPES");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)id_type);
+                                    HDfprintf(out, "%ld", (long)id_type);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1545,29 +1546,29 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'u':
                         if(ptr) {
                             if(vp) {
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                                 if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                                     unsigned *p = (unsigned*)vp;
 
-                                    fprintf(out, " {");
+                                    HDfprintf(out, " {");
                                     for(i = 0; i < asize[asize_idx]; i++)
                                         HDfprintf(out, "%s%u", i?", ":"", p[i]);
-                                    fprintf(out, "}");
+                                    HDfprintf(out, "}");
                                 } /* end if */
                             } /* end if */
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
-                            unsigned iu = va_arg(ap, unsigned); /*lint !e732 Loss of sign not really occuring */
+                            unsigned iu = va_arg(ap, unsigned);
 
-                            fprintf(out, "%u", iu);
+                            HDfprintf(out, "%u", iu);
                             asize[argno] = iu;
                         } /* end else */
                         break;
 
                     default:
-                        fprintf (out, "BADTYPE(I%c)", type[1]);
+                        HDfprintf (out, "BADTYPE(I%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -1577,43 +1578,43 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'l':
                         if(ptr) {
                             if(vp)
-                                fprintf (out, "0x%lx", (unsigned long)vp);
+                                HDfprintf (out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5L_type_t link_type = (H5L_type_t)va_arg(ap, int);
 
                             switch(link_type) {
                                 case H5L_TYPE_ERROR:
-                                    fprintf(out, "H5L_TYPE_ERROR");
+                                    HDfprintf(out, "H5L_TYPE_ERROR");
                                     break;
 
                                 case H5L_TYPE_HARD:
-                                    fprintf(out, "H5L_TYPE_HARD");
+                                    HDfprintf(out, "H5L_TYPE_HARD");
                                     break;
 
                                 case H5L_TYPE_SOFT:
-                                    fprintf(out, "H5L_TYPE_SOFT");
+                                    HDfprintf(out, "H5L_TYPE_SOFT");
                                     break;
 
                                 case H5L_TYPE_EXTERNAL:
-                                    fprintf(out, "H5L_TYPE_EXTERNAL");
+                                    HDfprintf(out, "H5L_TYPE_EXTERNAL");
                                     break;
 
                                 case H5L_TYPE_MAX:
-                                    fprintf(out, "H5L_TYPE_MAX");
+                                    HDfprintf(out, "H5L_TYPE_MAX");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)link_type);
+                                    HDfprintf(out, "%ld", (long)link_type);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf(out, "BADTYPE(G%c)", type[1]);
+                        HDfprintf(out, "BADTYPE(G%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -1623,15 +1624,15 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'c':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
 #ifdef H5_HAVE_PARALLEL
                         else {
                             MPI_Comm comm = va_arg(ap, MPI_Comm);
 
-                            fprintf(out, "%ld", (long)comm);
+                            HDfprintf(out, "%ld", (long)comm);
                         } /* end else */
 #endif /* H5_HAVE_PARALLEL */
                         break;
@@ -1639,15 +1640,15 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'i':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
 #ifdef H5_HAVE_PARALLEL
                         else {
                             MPI_Info info = va_arg(ap, MPI_Info);
 
-                            fprintf(out, "%ld", (long)info);
+                            HDfprintf(out, "%ld", (long)info);
                         } /* end else */
 #endif /* H5_HAVE_PARALLEL */
                         break;
@@ -1655,52 +1656,52 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5FD_mem_t mt = (H5FD_mem_t)va_arg(ap, int);
 
                             switch(mt) {
                                 case H5FD_MEM_NOLIST:
-                                    fprintf(out, "H5FD_MEM_NOLIST");
+                                    HDfprintf(out, "H5FD_MEM_NOLIST");
                                     break;
 
                                 case H5FD_MEM_DEFAULT:
-                                    fprintf(out, "H5FD_MEM_DEFAULT");
+                                    HDfprintf(out, "H5FD_MEM_DEFAULT");
                                     break;
 
                                 case H5FD_MEM_SUPER:
-                                    fprintf(out, "H5FD_MEM_SUPER");
+                                    HDfprintf(out, "H5FD_MEM_SUPER");
                                     break;
 
                                 case H5FD_MEM_BTREE:
-                                    fprintf(out, "H5FD_MEM_BTREE");
+                                    HDfprintf(out, "H5FD_MEM_BTREE");
                                     break;
 
                                 case H5FD_MEM_DRAW:
-                                    fprintf(out, "H5FD_MEM_DRAW");
+                                    HDfprintf(out, "H5FD_MEM_DRAW");
                                     break;
 
                                 case H5FD_MEM_GHEAP:
-                                    fprintf(out, "H5FD_MEM_GHEAP");
+                                    HDfprintf(out, "H5FD_MEM_GHEAP");
                                     break;
 
                                 case H5FD_MEM_LHEAP:
-                                    fprintf(out, "H5FD_MEM_LHEAP");
+                                    HDfprintf(out, "H5FD_MEM_LHEAP");
                                     break;
 
                                 case H5FD_MEM_OHDR:
-                                    fprintf(out, "H5FD_MEM_OHDR");
+                                    HDfprintf(out, "H5FD_MEM_OHDR");
                                     break;
 
                                 case H5FD_MEM_NTYPES:
-                                    fprintf(out, "H5FD_MEM_NTYPES");
+                                    HDfprintf(out, "H5FD_MEM_NTYPES");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)mt);
+                                    HDfprintf(out, "%ld", (long)mt);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1714,14 +1715,14 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 'o':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
                     off_t offset = va_arg(ap, off_t);
 
-                    fprintf (out, "%ld", (long)offset);
+                    HDfprintf (out, "%ld", (long)offset);
                 } /* end else */
                 break;
 
@@ -1730,43 +1731,43 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5O_type_t objtype = (H5O_type_t)va_arg(ap, int);
 
                             switch(objtype) {
                                 case H5O_TYPE_UNKNOWN:
-                                    fprintf(out, "H5O_TYPE_UNKNOWN");
+                                    HDfprintf(out, "H5O_TYPE_UNKNOWN");
                                     break;
 
                                 case H5O_TYPE_GROUP:
-                                    fprintf(out, "H5O_TYPE_GROUP");
+                                    HDfprintf(out, "H5O_TYPE_GROUP");
                                     break;
 
                                 case H5O_TYPE_DATASET:
-                                    fprintf(out, "H5O_TYPE_DATASET");
+                                    HDfprintf(out, "H5O_TYPE_DATASET");
                                     break;
 
                                 case H5O_TYPE_NAMED_DATATYPE:
-                                    fprintf(out, "H5O_TYPE_NAMED_DATATYPE");
+                                    HDfprintf(out, "H5O_TYPE_NAMED_DATATYPE");
                                     break;
 
                                 case H5O_TYPE_NTYPES:
-                                    fprintf(out, "H5O_TYPE_TYPES");
+                                    HDfprintf(out, "H5O_TYPE_TYPES");
                                     break;
 
                                 default:
-                                    fprintf(out, "BADTYPE(%ld)", (long)objtype);
+                                    HDfprintf(out, "BADTYPE(%ld)", (long)objtype);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf(out, "BADTYPE(S%c)", type[1]);
+                        HDfprintf(out, "BADTYPE(S%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -1774,9 +1775,9 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 'p':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
                     hid_t pclass_id = va_arg(ap, hid_t);
@@ -1787,23 +1788,23 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     /* (This may generate recursive call to the library... -QAK) */
                     if(NULL != (pclass = (H5P_genclass_t *)H5I_object(pclass_id)) &&
                             NULL != (class_name = H5P_get_class_name(pclass))) {
-                        fprintf(out, "%s", class_name);
+                        HDfprintf(out, "%s", class_name);
                         H5MM_xfree(class_name);
                     } /* end if */
                     else
-                        fprintf(out, "%ld", (long)pclass_id);
+                        HDfprintf(out, "%ld", (long)pclass_id);
                 } /* end else */
                 break;
 
             case 'r':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
-                    hobj_ref_t ref = va_arg(ap, hobj_ref_t); /*lint !e732 Loss of sign not really occuring */
+                    hobj_ref_t ref = va_arg(ap, hobj_ref_t);
 
                     HDfprintf(out, "Reference Object=%a", ref);
                 } /* end else */
@@ -1814,39 +1815,39 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5R_type_t reftype = (H5R_type_t)va_arg(ap, int);
 
                             switch(reftype) {
                                 case H5R_BADTYPE:
-                                    fprintf(out, "H5R_BADTYPE");
+                                    HDfprintf(out, "H5R_BADTYPE");
                                     break;
 
                                 case H5R_OBJECT:
-                                    fprintf(out, "H5R_OBJECT");
+                                    HDfprintf(out, "H5R_OBJECT");
                                     break;
 
                                 case H5R_DATASET_REGION:
-                                    fprintf(out, "H5R_DATASET_REGION");
+                                    HDfprintf(out, "H5R_DATASET_REGION");
                                     break;
 
                                 case H5R_MAXTYPE:
-                                    fprintf(out, "H5R_MAXTYPE");
+                                    HDfprintf(out, "H5R_MAXTYPE");
                                     break;
 
                                 default:
-                                    fprintf(out, "BADTYPE(%ld)", (long)reftype);
+                                    HDfprintf(out, "BADTYPE(%ld)", (long)reftype);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf(out, "BADTYPE(S%c)", type[1]);
+                        HDfprintf(out, "BADTYPE(S%c)", type[1]);
                         goto error;
                 }
                 break;
@@ -1856,32 +1857,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'c':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5S_class_t cls = (H5S_class_t)va_arg(ap, int);
 
                             switch(cls) {
                                 case H5S_NO_CLASS:
-                                    fprintf(out, "H5S_NO_CLASS");
+                                    HDfprintf(out, "H5S_NO_CLASS");
                                     break;
 
                                 case H5S_SCALAR:
-                                    fprintf(out, "H5S_SCALAR");
+                                    HDfprintf(out, "H5S_SCALAR");
                                     break;
 
                                 case H5S_SIMPLE:
-                                    fprintf(out, "H5S_SIMPLE");
+                                    HDfprintf(out, "H5S_SIMPLE");
                                     break;
 
                                 case H5S_NULL:
-                                    fprintf(out, "H5S_NULL");
+                                    HDfprintf(out, "H5S_NULL");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)cls);
+                                    HDfprintf(out, "%ld", (long)cls);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1890,56 +1891,56 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 's':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5S_seloper_t so = (H5S_seloper_t)va_arg(ap, int);
 
                             switch(so) {
                                 case H5S_SELECT_NOOP:
-                                    fprintf(out, "H5S_NOOP");
+                                    HDfprintf(out, "H5S_NOOP");
                                     break;
 
                                 case H5S_SELECT_SET:
-                                    fprintf(out, "H5S_SELECT_SET");
+                                    HDfprintf(out, "H5S_SELECT_SET");
                                     break;
 
                                 case H5S_SELECT_OR:
-                                    fprintf(out, "H5S_SELECT_OR");
+                                    HDfprintf(out, "H5S_SELECT_OR");
                                     break;
 
                                 case H5S_SELECT_AND:
-                                    fprintf(out, "H5S_SELECT_AND");
+                                    HDfprintf(out, "H5S_SELECT_AND");
                                     break;
 
                                 case H5S_SELECT_XOR:
-                                    fprintf(out, "H5S_SELECT_XOR");
+                                    HDfprintf(out, "H5S_SELECT_XOR");
                                     break;
 
                                 case H5S_SELECT_NOTB:
-                                    fprintf(out, "H5S_SELECT_NOTB");
+                                    HDfprintf(out, "H5S_SELECT_NOTB");
                                     break;
 
                                 case H5S_SELECT_NOTA:
-                                    fprintf(out, "H5S_SELECT_NOTA");
+                                    HDfprintf(out, "H5S_SELECT_NOTA");
                                     break;
 
                                 case H5S_SELECT_APPEND:
-                                    fprintf(out, "H5S_SELECT_APPEND");
+                                    HDfprintf(out, "H5S_SELECT_APPEND");
                                     break;
 
                                 case H5S_SELECT_PREPEND:
-                                    fprintf(out, "H5S_SELECT_PREPEND");
+                                    HDfprintf(out, "H5S_SELECT_PREPEND");
                                     break;
 
                                 case H5S_SELECT_INVALID:
-                                    fprintf(out, "H5S_SELECT_INVALID");
+                                    HDfprintf(out, "H5S_SELECT_INVALID");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)so);
+                                    HDfprintf(out, "%ld", (long)so);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -1948,47 +1949,47 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5S_sel_type st = (H5S_sel_type)va_arg(ap, int);
 
                             switch(st) {
                                 case H5S_SEL_ERROR:
-                                    fprintf(out, "H5S_SEL_ERROR");
+                                    HDfprintf(out, "H5S_SEL_ERROR");
                                     break;
 
                                 case H5S_SEL_NONE:
-                                    fprintf(out, "H5S_SEL_NONE");
+                                    HDfprintf(out, "H5S_SEL_NONE");
                                     break;
 
                                 case H5S_SEL_POINTS:
-                                    fprintf(out, "H5S_SEL_POINTS");
+                                    HDfprintf(out, "H5S_SEL_POINTS");
                                     break;
 
                                 case H5S_SEL_HYPERSLABS:
-                                    fprintf(out, "H5S_SEL_HYPERSLABS");
+                                    HDfprintf(out, "H5S_SEL_HYPERSLABS");
                                     break;
 
                                 case H5S_SEL_ALL:
-                                    fprintf(out, "H5S_SEL_ALL");
+                                    HDfprintf(out, "H5S_SEL_ALL");
                                     break;
 
                                 case H5S_SEL_N:
-                                    fprintf(out, "H5S_SEL_N");
+                                    HDfprintf(out, "H5S_SEL_N");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)st);
+                                    HDfprintf(out, "%ld", (long)st);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf(out, "BADTYPE(S%c)", type[1]);
+                        HDfprintf(out, "BADTYPE(S%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -1996,14 +1997,14 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 's':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
-                    const char *str = va_arg(ap, const char *); /*lint !e64 Type mismatch not really occuring */
+                    const char *str = va_arg(ap, const char *);
 
-                    fprintf(out, "\"%s\"", str);
+                    HDfprintf(out, "\"%s\"", str);
                 } /* end else */
                 break;
 
@@ -2012,24 +2013,24 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'c':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_cset_t cset = (H5T_cset_t)va_arg(ap, int);
 
                             switch(cset) {
                                 case H5T_CSET_ERROR:
-                                    fprintf(out, "H5T_CSET_ERROR");
+                                    HDfprintf(out, "H5T_CSET_ERROR");
                                     break;
 
                                 case H5T_CSET_ASCII:
-                                    fprintf(out, "H5T_CSET_ASCII");
+                                    HDfprintf(out, "H5T_CSET_ASCII");
                                     break;
 
                                 case H5T_CSET_UTF8:
-                                    fprintf(out, "H5T_CSET_UTF8");
+                                    HDfprintf(out, "H5T_CSET_UTF8");
                                     break;
 
                                 case H5T_CSET_RESERVED_2:
@@ -2046,11 +2047,11 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                                 case H5T_CSET_RESERVED_13:
                                 case H5T_CSET_RESERVED_14:
                                 case H5T_CSET_RESERVED_15:
-                                    fprintf(out, "H5T_CSET_RESERVED_%ld", (long)cset);
+                                    HDfprintf(out, "H5T_CSET_RESERVED_%ld", (long)cset);
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)cset);
+                                    HDfprintf(out, "%ld", (long)cset);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2059,28 +2060,28 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'd':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_direction_t direct = (H5T_direction_t)va_arg(ap, int);
 
                             switch(direct) {
                                 case H5T_DIR_DEFAULT:
-                                    fprintf(out, "H5T_DIR_DEFAULT");
+                                    HDfprintf(out, "H5T_DIR_DEFAULT");
                                     break;
 
                                 case H5T_DIR_ASCEND:
-                                    fprintf(out, "H5T_DIR_ASCEND");
+                                    HDfprintf(out, "H5T_DIR_ASCEND");
                                     break;
 
                                 case H5T_DIR_DESCEND:
-                                    fprintf(out, "H5T_DIR_DESCEND");
+                                    HDfprintf(out, "H5T_DIR_DESCEND");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)direct);
+                                    HDfprintf(out, "%ld", (long)direct);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2089,28 +2090,28 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'e':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_pers_t pers = (H5T_pers_t)va_arg(ap, int);
 
                             switch(pers) {
                                 case H5T_PERS_DONTCARE:
-                                    fprintf(out, "H5T_PERS_DONTCARE");
+                                    HDfprintf(out, "H5T_PERS_DONTCARE");
                                     break;
 
                                 case H5T_PERS_SOFT:
-                                    fprintf(out, "H5T_PERS_SOFT");
+                                    HDfprintf(out, "H5T_PERS_SOFT");
                                     break;
 
                                 case H5T_PERS_HARD:
-                                    fprintf(out, "H5T_PERS_HARD");
+                                    HDfprintf(out, "H5T_PERS_HARD");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)pers);
+                                    HDfprintf(out, "%ld", (long)pers);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2119,32 +2120,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'n':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_norm_t norm = (H5T_norm_t)va_arg(ap, int);
 
                             switch(norm) {
                                 case H5T_NORM_ERROR:
-                                    fprintf(out, "H5T_NORM_ERROR");
+                                    HDfprintf(out, "H5T_NORM_ERROR");
                                     break;
 
                                 case H5T_NORM_IMPLIED:
-                                    fprintf(out, "H5T_NORM_IMPLIED");
+                                    HDfprintf(out, "H5T_NORM_IMPLIED");
                                     break;
 
                                 case H5T_NORM_MSBSET:
-                                    fprintf(out, "H5T_NORM_MSBSET");
+                                    HDfprintf(out, "H5T_NORM_MSBSET");
                                     break;
 
                                 case H5T_NORM_NONE:
-                                    fprintf(out, "H5T_NORM_NONE");
+                                    HDfprintf(out, "H5T_NORM_NONE");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)norm);
+                                    HDfprintf(out, "%ld", (long)norm);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2153,40 +2154,40 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'o':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_order_t order = (H5T_order_t)va_arg(ap, int);
 
                             switch(order) {
                                 case H5T_ORDER_ERROR:
-                                    fprintf(out, "H5T_ORDER_ERROR");
+                                    HDfprintf(out, "H5T_ORDER_ERROR");
                                     break;
 
                                 case H5T_ORDER_LE:
-                                    fprintf(out, "H5T_ORDER_LE");
+                                    HDfprintf(out, "H5T_ORDER_LE");
                                     break;
 
                                 case H5T_ORDER_BE:
-                                    fprintf(out, "H5T_ORDER_BE");
+                                    HDfprintf(out, "H5T_ORDER_BE");
                                     break;
 
                                 case H5T_ORDER_VAX:
-                                    fprintf(out, "H5T_ORDER_VAX");
+                                    HDfprintf(out, "H5T_ORDER_VAX");
                                     break;
 
                                 case H5T_ORDER_MIXED:
-                                    fprintf(out, "H5T_ORDER_MIXED");
+                                    HDfprintf(out, "H5T_ORDER_MIXED");
                                     break;
 
                                 case H5T_ORDER_NONE:
-                                    fprintf(out, "H5T_ORDER_NONE");
+                                    HDfprintf(out, "H5T_ORDER_NONE");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)order);
+                                    HDfprintf(out, "%ld", (long)order);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2195,36 +2196,36 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'p':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_pad_t pad = (H5T_pad_t)va_arg(ap, int);
 
                             switch(pad) {
                                 case H5T_PAD_ERROR:
-                                    fprintf(out, "H5T_PAD_ERROR");
+                                    HDfprintf(out, "H5T_PAD_ERROR");
                                     break;
 
                                 case H5T_PAD_ZERO:
-                                    fprintf(out, "H5T_PAD_ZERO");
+                                    HDfprintf(out, "H5T_PAD_ZERO");
                                     break;
 
                                 case H5T_PAD_ONE:
-                                    fprintf(out, "H5T_PAD_ONE");
+                                    HDfprintf(out, "H5T_PAD_ONE");
                                     break;
 
                                 case H5T_PAD_BACKGROUND:
-                                    fprintf(out, "H5T_PAD_BACKGROUND");
+                                    HDfprintf(out, "H5T_PAD_BACKGROUND");
                                     break;
 
                                 case H5T_NPAD:
-                                    fprintf(out, "H5T_NPAD");
+                                    HDfprintf(out, "H5T_NPAD");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)pad);
+                                    HDfprintf(out, "%ld", (long)pad);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2233,32 +2234,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 's':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_sign_t sign = (H5T_sign_t)va_arg(ap, int);
 
                             switch(sign) {
                                 case H5T_SGN_ERROR:
-                                    fprintf(out, "H5T_SGN_ERROR");
+                                    HDfprintf(out, "H5T_SGN_ERROR");
                                     break;
 
                                 case H5T_SGN_NONE:
-                                    fprintf(out, "H5T_SGN_NONE");
+                                    HDfprintf(out, "H5T_SGN_NONE");
                                     break;
 
                                 case H5T_SGN_2:
-                                    fprintf(out, "H5T_SGN_2");
+                                    HDfprintf(out, "H5T_SGN_2");
                                     break;
 
                                 case H5T_NSGN:
-                                    fprintf(out, "H5T_NSGN");
+                                    HDfprintf(out, "H5T_NSGN");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)sign);
+                                    HDfprintf(out, "%ld", (long)sign);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2267,68 +2268,68 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 't':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_class_t type_class = (H5T_class_t)va_arg(ap, int);
 
                             switch(type_class) {
                                 case H5T_NO_CLASS:
-                                    fprintf(out, "H5T_NO_CLASS");
+                                    HDfprintf(out, "H5T_NO_CLASS");
                                     break;
 
                                 case H5T_INTEGER:
-                                    fprintf(out, "H5T_INTEGER");
+                                    HDfprintf(out, "H5T_INTEGER");
                                     break;
 
                                 case H5T_FLOAT:
-                                    fprintf(out, "H5T_FLOAT");
+                                    HDfprintf(out, "H5T_FLOAT");
                                     break;
 
                                 case H5T_TIME:
-                                    fprintf(out, "H5T_TIME");
+                                    HDfprintf(out, "H5T_TIME");
                                     break;
 
                                 case H5T_STRING:
-                                    fprintf(out, "H5T_STRING");
+                                    HDfprintf(out, "H5T_STRING");
                                     break;
 
                                 case H5T_BITFIELD:
-                                    fprintf(out, "H5T_BITFIELD");
+                                    HDfprintf(out, "H5T_BITFIELD");
                                     break;
 
                                 case H5T_OPAQUE:
-                                    fprintf(out, "H5T_OPAQUE");
+                                    HDfprintf(out, "H5T_OPAQUE");
                                     break;
 
                                 case H5T_COMPOUND:
-                                    fprintf(out, "H5T_COMPOUND");
+                                    HDfprintf(out, "H5T_COMPOUND");
                                     break;
 
                                 case H5T_REFERENCE:
-                                    fprintf(out, "H5T_REFERENCE");
+                                    HDfprintf(out, "H5T_REFERENCE");
                                     break;
 
                                 case H5T_ENUM:
-                                    fprintf(out, "H5T_ENUM");
+                                    HDfprintf(out, "H5T_ENUM");
                                     break;
 
                                 case H5T_VLEN:
-                                    fprintf(out, "H5T_VLEN");
+                                    HDfprintf(out, "H5T_VLEN");
                                     break;
 
                                 case H5T_ARRAY:
-                                    fprintf(out, "H5T_ARRAY");
+                                    HDfprintf(out, "H5T_ARRAY");
                                     break;
 
                                 case H5T_NCLASSES:
-                                    fprintf(out, "H5T_NCLASSES");
+                                    HDfprintf(out, "H5T_NCLASSES");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)type_class);
+                                    HDfprintf(out, "%ld", (long)type_class);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2337,28 +2338,28 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'z':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5T_str_t str = (H5T_str_t)va_arg(ap, int);
 
                             switch(str) {
                                 case H5T_STR_ERROR:
-                                    fprintf(out, "H5T_STR_ERROR");
+                                    HDfprintf(out, "H5T_STR_ERROR");
                                     break;
 
                                 case H5T_STR_NULLTERM:
-                                    fprintf(out, "H5T_STR_NULLTERM");
+                                    HDfprintf(out, "H5T_STR_NULLTERM");
                                     break;
 
                                 case H5T_STR_NULLPAD:
-                                    fprintf(out, "H5T_STR_NULLPAD");
+                                    HDfprintf(out, "H5T_STR_NULLPAD");
                                     break;
 
                                 case H5T_STR_SPACEPAD:
-                                    fprintf(out, "H5T_STR_SPACEPAD");
+                                    HDfprintf(out, "H5T_STR_SPACEPAD");
                                     break;
 
                                 case H5T_STR_RESERVED_3:
@@ -2374,18 +2375,18 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                                 case H5T_STR_RESERVED_13:
                                 case H5T_STR_RESERVED_14:
                                 case H5T_STR_RESERVED_15:
-                                    fprintf(out, "H5T_STR_RESERVED(%ld)",(long)str);
+                                    HDfprintf(out, "H5T_STR_RESERVED(%ld)",(long)str);
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)str);
+                                    HDfprintf(out, "%ld", (long)str);
                                     break;
                             } /* end switch */
                         } /* end else */
                         break;
 
                     default:
-                        fprintf (out, "BADTYPE(T%c)", type[1]);
+                        HDfprintf (out, "BADTYPE(T%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -2393,19 +2394,19 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 't':
                 if(ptr) {
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
                     htri_t tri_var = va_arg (ap, htri_t);
 
                     if(tri_var>0)
-                        fprintf (out, "TRUE");
+                        HDfprintf (out, "TRUE");
                     else if(!tri_var)
-                        fprintf (out, "FALSE");
+                        HDfprintf (out, "FALSE");
                     else
-                        fprintf(out, "FAIL(%d)", (int)tri_var);
+                        HDfprintf(out, "FAIL(%d)", (int)tri_var);
                 } /* end else */
                 break;
 
@@ -2414,23 +2415,23 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'l':
                         if(ptr) {
                             if(vp) {
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                                 if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                                     unsigned long *p = (unsigned long *)vp;
 
-                                    fprintf(out, " {");
+                                    HDfprintf(out, " {");
                                     for(i = 0; i < asize[asize_idx]; i++)
                                         HDfprintf(out, "%s%lu", i?", ":"", p[i]);
-                                    fprintf(out, "}");
+                                    HDfprintf(out, "}");
                                 } /* end if */
                             } /* end if */
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
-                            unsigned long iul = va_arg(ap, unsigned long); /*lint !e732 Loss of sign not really occuring */
+                            unsigned long iul = va_arg(ap, unsigned long);
 
-                            fprintf(out, "%lu", iul);
+                            HDfprintf(out, "%lu", iul);
                             asize[argno] = (hssize_t)iul;
                         } /* end else */
                         break;
@@ -2438,29 +2439,29 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'L':
                         if(ptr) {
                             if(vp) {
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                                 if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                                     unsigned long long *p = (unsigned long long *)vp;
 
-                                    fprintf(out, " {");
+                                    HDfprintf(out, " {");
                                     for(i = 0; i < asize[asize_idx]; i++)
                                         HDfprintf(out, "%s%llu", i?", ":"", p[i]);
-                                    fprintf(out, "}");
+                                    HDfprintf(out, "}");
                                 } /* end if */
                             } /* end if */
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
-                            unsigned long long iull = va_arg(ap, unsigned long long); /*lint !e732 Loss of sign not really occuring */
+                            unsigned long long iull = va_arg(ap, unsigned long long);
 
-                            fprintf(out, "%llu", iull);
+                            HDfprintf(out, "%llu", iull);
                             asize[argno] = (hssize_t)iull;
                         } /* end else */
                         break;
 
                     default:
-                        fprintf (out, "BADTYPE(U%c)", type[1]);
+                        HDfprintf (out, "BADTYPE(U%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
@@ -2468,51 +2469,51 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
             case 'x':
                 if(ptr) {
                     if(vp) {
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                         if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                             void **p = (void**)vp;
 
-                            fprintf(out, " {");
+                            HDfprintf(out, " {");
                             for(i = 0; i < asize[asize_idx]; i++) {
                                 if(p[i])
-                                    fprintf(out, "%s0x%lx", (i ? ", " : ""), (unsigned long)(p[i]));
+                                    HDfprintf(out, "%s0x%lx", (i ? ", " : ""), (unsigned long)(p[i]));
                                 else
-                                    fprintf(out, "%sNULL", (i ? ", " : ""));
+                                    HDfprintf(out, "%sNULL", (i ? ", " : ""));
                             } /* end for */
-                            fprintf(out, "}");
+                            HDfprintf(out, "}");
                         } /* end if */
                     } /* end if */
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
-                    vp = va_arg (ap, void *); /*lint !e64 Type mismatch not really occuring */
+                    vp = va_arg (ap, void *);
 
                     if(vp)
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end else */
                 break;
 
             case 'z':
                 if(ptr) {
                     if(vp) {
-                        fprintf(out, "0x%lx", (unsigned long)vp);
+                        HDfprintf(out, "0x%lx", (unsigned long)vp);
                         if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                             size_t *p = (size_t *)vp;
 
-                            fprintf(out, " {");
+                            HDfprintf(out, " {");
                             for(i = 0; i < asize[asize_idx]; i++)
                                 HDfprintf(out, "%s%Zu", (i ? ", " : ""), p[i]);
-                            fprintf(out, "}");
+                            HDfprintf(out, "}");
                         } /* end if */
                     } /* end if */
                     else
-                        fprintf(out, "NULL");
+                        HDfprintf(out, "NULL");
                 } /* end if */
                 else {
-                    size_t size = va_arg(ap, size_t); /*lint !e732 Loss of sign not really occuring */
+                    size_t size = va_arg(ap, size_t);
 
                     HDfprintf(out, "%Zu", size);
                     asize[argno] = (hssize_t)size;
@@ -2524,28 +2525,28 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'a':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5Z_SO_scale_type_t scale_type = (H5Z_SO_scale_type_t)va_arg(ap, int);
 
                             switch(scale_type) {
                                 case H5Z_SO_FLOAT_DSCALE:
-                                    fprintf(out, "H5Z_SO_FLOAT_DSCALE");
+                                    HDfprintf(out, "H5Z_SO_FLOAT_DSCALE");
                                     break;
 
                                 case H5Z_SO_FLOAT_ESCALE:
-                                    fprintf(out, "H5Z_SO_FLOAT_ESCALE");
+                                    HDfprintf(out, "H5Z_SO_FLOAT_ESCALE");
                                     break;
 
                                 case H5Z_SO_INT:
-                                    fprintf(out, "H5Z_SO_INT");
+                                    HDfprintf(out, "H5Z_SO_INT");
                                     break;
 
                                 default:
-                                    fprintf(out, "%ld", (long)scale_type);
+                                    HDfprintf(out, "%ld", (long)scale_type);
                                     break;
                             } /* end switch */
                         } /* end else */
@@ -2554,68 +2555,68 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                     case 'c':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
-                            H5Z_class2_t *filter = va_arg(ap, H5Z_class2_t*); /*lint !e64 Type mismatch not really occuring */
+                            H5Z_class2_t *filter = va_arg(ap, H5Z_class2_t*);
 
-                            fprintf(out, "0x%lx", (unsigned long)filter);
+                            HDfprintf(out, "0x%lx", (unsigned long)filter);
                         } /* end else */
                         break;
 
                     case 'e':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5Z_EDC_t edc = (H5Z_EDC_t)va_arg(ap, int);
 
                             if(H5Z_DISABLE_EDC == edc)
-                                fprintf(out, "H5Z_DISABLE_EDC");
+                                HDfprintf(out, "H5Z_DISABLE_EDC");
                             else if (H5Z_ENABLE_EDC == edc)
-                                fprintf(out, "H5Z_ENABLE_EDC");
+                                HDfprintf(out, "H5Z_ENABLE_EDC");
                             else
-                                fprintf(out, "%ld", (long)edc);
+                                HDfprintf(out, "%ld", (long)edc);
                         } /* end else */
                         break;
 
                     case 'f':
                         if(ptr) {
                             if(vp)
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             H5Z_filter_t id = va_arg(ap, H5Z_filter_t);
 
                             if(H5Z_FILTER_DEFLATE == id)
-                                fprintf(out, "H5Z_FILTER_DEFLATE");
+                                HDfprintf(out, "H5Z_FILTER_DEFLATE");
                             else
-                                fprintf(out, "%ld", (long)id);
+                                HDfprintf(out, "%ld", (long)id);
                         } /* end else */
                         break;
 
                     case 's':
                         if(ptr) {
                             if(vp) {
-                                fprintf(out, "0x%lx", (unsigned long)vp);
+                                HDfprintf(out, "0x%lx", (unsigned long)vp);
                                 if(asize_idx >= 0 && asize[asize_idx] >= 0) {
                                     ssize_t *p = (ssize_t *)vp;
 
-                                    fprintf(out, " {");
+                                    HDfprintf(out, " {");
                                     for(i = 0; i < asize[asize_idx]; i++)
                                         HDfprintf(out, "%s%Zd", (i ? ", " : ""), p[i]);
-                                    fprintf(out, "}");
+                                    HDfprintf(out, "}");
                                 } /* end if */
                             } /* end if */
                             else
-                                fprintf(out, "NULL");
+                                HDfprintf(out, "NULL");
                         } /* end if */
                         else {
                             ssize_t ssize = va_arg(ap, ssize_t);
@@ -2626,32 +2627,32 @@ H5_trace(const double *returning, const char *func, const char *type, ...)
                         break;
 
                     default:
-                        fprintf(out, "BADTYPE(Z%c)", type[1]);
+                        HDfprintf(out, "BADTYPE(Z%c)", type[1]);
                         goto error;
                 } /* end switch */
                 break;
 
             default:
                 if(HDisupper(type[0]))
-                    fprintf(out, "BADTYPE(%c%c)", type[0], type[1]);
+                    HDfprintf(out, "BADTYPE(%c%c)", type[0], type[1]);
                 else
-                    fprintf(out, "BADTYPE(%c)", type[0]);
+                    HDfprintf(out, "BADTYPE(%c)", type[0]);
                 goto error;
         } /* end switch */
     } /* end for */
 
     /* Display event time for return */
     if(returning && H5_debug_g.ttimes)
-        fprintf(out, " @%.6f [dt=%.6f]", (event_time.etime - first_time.etime),
+        HDfprintf(out, " @%.6f [dt=%.6f]", (event_time.etime - first_time.etime),
                 (event_time.etime - *returning));
 
 error:
     va_end(ap);
     if(returning)
-        fprintf(out, ";\n");
+        HDfprintf(out, ";\n");
     else {
         last_call_depth = current_depth++;
-        fprintf (out, ")");
+        HDfprintf (out, ")");
     } /* end else */
     HDfflush(out);
 
diff --git a/src/H5vers.txt b/src/H5vers.txt
index 07d2c4b..0303bf5 100644
--- a/src/H5vers.txt
+++ b/src/H5vers.txt
@@ -4,12 +4,10 @@
 #
 # This file is part of HDF5.  The full HDF5 copyright notice, including
 # terms governing use, modification, and redistribution, is contained in
-# the files COPYING and Copyright.html.  COPYING can be found at the root
-# of the source code distribution tree; Copyright.html can be found at the
-# root level of an installed copy of the electronic HDF5 document set and
-# is linked from the top-level documents page.  It can also be found at
-# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
-# access to either file, you may request a copy from help@hdfgroup.org.
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
 #
 
 # This file is used to generate the various headers that are needed for
diff --git a/src/H5win32defs.h b/src/H5win32defs.h
index e005b51..4522228 100644
--- a/src/H5win32defs.h
+++ b/src/H5win32defs.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /* Programmer:  Scott Wegner
@@ -50,9 +48,13 @@ typedef __int64             h5_stat_size_t;
 #define HDnanosleep(N, O)   Wnanosleep(N, O)
 #define HDoff_t             __int64
 /* _O_BINARY must be set in Windows to avoid CR-LF <-> LF EOL
- * transformations when performing I/O.
+ * transformations when performing I/O. Note that this will
+ * produce Unix-style text files, though.
+ *
+ * Also note that the variadic macro is using a VC++ extension
+ * where the comma is dropped if nothing is passed to the ellipsis.
  */
-#define HDopen(S,F,M)       _open(S,F|_O_BINARY,M)
+#define HDopen(S,F,...)       _open(S, F | _O_BINARY, __VA_ARGS__)
 #define HDread(F,M,Z)       _read(F,M,Z)
 #define HDrmdir(S)          _rmdir(S)
 #define HDsetvbuf(F,S,M,Z)  setvbuf(F,S,M,(Z>1?Z:2))
@@ -117,6 +119,7 @@ extern "C" {
     H5_DLL int c99_snprintf(char* str, size_t size, const char* format, ...);
     H5_DLL int c99_vsnprintf(char* str, size_t size, const char* format, va_list ap);
     H5_DLL int Wnanosleep(const struct timespec *req, struct timespec *rem);
+    H5_DLL herr_t H5_expand_windows_env_vars(char **env_var);
 
     /* Round functions only needed for VS2012 and earlier.
      * They are always built to ensure they don't go stale and
diff --git a/src/Makefile.am b/src/Makefile.am
index 59df4c2..21f3966 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -5,12 +5,10 @@
 #
 # This file is part of HDF5.  The full HDF5 copyright notice, including
 # terms governing use, modification, and redistribution, is contained in
-# the files COPYING and Copyright.html.  COPYING can be found at the root
-# of the source code distribution tree; Copyright.html can be found at the
-# root level of an installed copy of the electronic HDF5 document set and
-# is linked from the top-level documents page.  It can also be found at
-# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
-# access to either file, you may request a copy from help@hdfgroup.org.
+# the COPYING file, which can be found at the root of the source code
+# distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.
+# If you do not have access to either file, you may request a copy from
+# help@hdfgroup.org.
 ##
 ## Makefile.am
 ## Run automake to generate a Makefile.in from this file.
@@ -49,6 +47,7 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5C.c H5Cdbg.c H5Cepoch.c H5Cimage.c H5Clog.c H5Cprefetched.c \
         H5Cquery.c H5Ctag.c H5Ctest.c \
         H5CS.c \
+        H5CX.c \
         H5D.c H5Dbtree.c H5Dbtree2.c H5Dchunk.c H5Dcompact.c H5Dcontig.c H5Ddbg.c \
         H5Ddeprec.c H5Dearray.c H5Defl.c H5Dfarray.c H5Dfill.c H5Dint.c \
         H5Dio.c H5Dlayout.c H5Dnone.c \
@@ -57,8 +56,8 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5E.c H5Edeprec.c H5Eint.c \
         H5EA.c H5EAcache.c H5EAdbg.c H5EAdblkpage.c H5EAdblock.c H5EAhdr.c \
         H5EAiblock.c H5EAint.c H5EAsblock.c H5EAstat.c H5EAtest.c \
-        H5F.c H5Fint.c H5Faccum.c H5Fcwfs.c \
-        H5Fdbg.c H5Fdeprec.c H5Fefc.c H5Ffake.c H5Fio.c \
+        H5F.c H5Faccum.c H5Fcwfs.c \
+        H5Fdbg.c H5Fdeprec.c H5Fefc.c H5Ffake.c H5Fint.c H5Fio.c \
         H5Fmount.c H5Fquery.c \
         H5Fsfile.c H5Fspace.c H5Fsuper.c H5Fsuper_cache.c H5Ftest.c \
         H5FA.c H5FAcache.c H5FAdbg.c H5FAdblock.c H5FAdblkpage.c H5FAhdr.c \
@@ -86,7 +85,7 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5Ochunk.c \
         H5Ocont.c H5Ocopy.c H5Odbg.c H5Odrvinfo.c H5Odtype.c H5Oefl.c \
         H5Ofill.c H5Oflush.c H5Ofsinfo.c H5Oginfo.c \
-        H5Olayout.c \
+        H5Oint.c H5Olayout.c \
         H5Olinfo.c H5Olink.c H5Omessage.c H5Omtime.c \
         H5Oname.c H5Onull.c H5Opline.c H5Orefcount.c \
         H5Osdspace.c H5Oshared.c \
@@ -99,8 +98,8 @@ libhdf5_la_SOURCES= H5.c H5checksum.c H5dbg.c H5system.c H5timer.c H5trace.c \
         H5Pgcpl.c H5Pint.c \
         H5Plapl.c H5Plcpl.c H5Pocpl.c H5Pocpypl.c H5Pstrcpl.c H5Ptest.c \
         H5PB.c \
-        H5PL.c \
-        H5R.c H5Rdeprec.c \
+        H5PL.c H5PLint.c H5PLpath.c H5PLplugin_cache.c \
+        H5R.c H5Rint.c H5Rdeprec.c \
         H5UC.c \
         H5RS.c \
         H5S.c H5Sall.c H5Sdbg.c H5Shyper.c H5Snone.c H5Spoint.c \
diff --git a/src/hdf5.h b/src/hdf5.h
index 7a10507..1709375 100644
--- a/src/hdf5.h
+++ b/src/hdf5.h
@@ -5,12 +5,10 @@
  *                                                                           *
  * This file is part of HDF5.  The full HDF5 copyright notice, including     *
  * terms governing use, modification, and redistribution, is contained in    *
- * the files COPYING and Copyright.html.  COPYING can be found at the root   *
- * of the source code distribution tree; Copyright.html can be found at the  *
- * root level of an installed copy of the electronic HDF5 document set and   *
- * is linked from the top-level documents page.  It can also be found at     *
- * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
- * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
 
 /*
@@ -22,35 +20,35 @@
 #define _HDF5_H
 
 #include "H5public.h"
-#include "H5Apublic.h"		/* Attributes				*/
-#include "H5ACpublic.h"		/* Metadata cache			*/
-#include "H5Dpublic.h"		/* Datasets				*/
-#include "H5Epublic.h"		/* Errors				*/
-#include "H5Fpublic.h"		/* Files				*/
-#include "H5FDpublic.h"		/* File drivers				*/
-#include "H5Gpublic.h"		/* Groups				*/
-#include "H5Ipublic.h"		/* ID management			*/
-#include "H5Lpublic.h"		/* Links				*/
-#include "H5MMpublic.h"		/* Memory management			*/
-#include "H5Opublic.h"		/* Object headers			*/
-#include "H5Ppublic.h"      /* Property lists           */
-#include "H5PLpublic.h"     /* Plugins           */
-#include "H5Rpublic.h"		/* References				*/
-#include "H5Spublic.h"		/* Dataspaces				*/
-#include "H5Tpublic.h"		/* Datatypes				*/
-#include "H5Zpublic.h"		/* Data filters				*/
+#include "H5Apublic.h"          /* Attributes                               */
+#include "H5ACpublic.h"         /* Metadata cache                           */
+#include "H5Dpublic.h"          /* Datasets                                 */
+#include "H5Epublic.h"          /* Errors                                   */
+#include "H5Fpublic.h"          /* Files                                    */
+#include "H5FDpublic.h"         /* File drivers                             */
+#include "H5Gpublic.h"          /* Groups                                   */
+#include "H5Ipublic.h"          /* ID management                            */
+#include "H5Lpublic.h"          /* Links                                    */
+#include "H5MMpublic.h"         /* Memory management                        */
+#include "H5Opublic.h"          /* Object headers                           */
+#include "H5Ppublic.h"          /* Property lists                           */
+#include "H5PLpublic.h"         /* Plugins                                  */
+#include "H5Rpublic.h"          /* References                               */
+#include "H5Spublic.h"          /* Dataspaces                               */
+#include "H5Tpublic.h"          /* Datatypes                                */
+#include "H5Zpublic.h"          /* Data filters                             */
 
 /* Predefined file drivers */
-#include "H5FDcore.h"		/* Files stored entirely in memory	*/
-#include "H5FDdirect.h"     	/* Linux direct I/O			*/
-#include "H5FDfamily.h"		/* File families 			*/
-#include "H5FDlog.h"        	/* sec2 driver with I/O logging (for debugging) */
-#include "H5FDmpi.h"            /* MPI-based file drivers		*/
-#include "H5FDmulti.h"		/* Usage-partitioned file family	*/
-#include "H5FDsec2.h"		/* POSIX unbuffered file I/O		*/
-#include "H5FDstdio.h"		/* Standard C buffered I/O		*/
+#include "H5FDcore.h"           /* Files stored entirely in memory              */
+#include "H5FDdirect.h"         /* Linux direct I/O                             */
+#include "H5FDfamily.h"         /* File families                                */
+#include "H5FDlog.h"            /* sec2 driver with I/O logging (for debugging) */
+#include "H5FDmpi.h"            /* MPI-based file drivers                       */
+#include "H5FDmulti.h"          /* Usage-partitioned file family                */
+#include "H5FDsec2.h"           /* POSIX unbuffered file I/O                    */
+#include "H5FDstdio.h"          /* Standard C buffered I/O                      */
 #ifdef H5_HAVE_WINDOWS
-#include "H5FDwindows.h"        /* Windows buffered I/O     */
+#include "H5FDwindows.h"        /* Win32 I/O                                    */
 #endif
 
 #endif
diff --git a/src/libhdf5.settings.in b/src/libhdf5.settings.in
index 8017594..51b24dc 100644
--- a/src/libhdf5.settings.in
+++ b/src/libhdf5.settings.in
@@ -28,6 +28,7 @@ Linking Options:
                      AM_LDFLAGS: @AM_LDFLAGS@
                 Extra libraries: @LIBS@
                        Archiver: @AR@
+                       AR_FLAGS: @AR_FLAGS@
                          Ranlib: @RANLIB@
 
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